Ventilation structure for long-distance small-section tunnel construction

Abstract

The utility model discloses a long distance small section tunnel construction ventilation structure relates to tunnel construction ventilation technical field, including support frame, the upside fixed coupling of support frame has fixed seat and the air pipe, the inboard fixed mounting of fixed seat has the fan, the upside fixed coupling of air pipe has the support seat, the upside fixed coupling of support seat has the mounting seat, the inboard mounting of mounting seat has the pullback mechanism, the bottom connection of pullback mechanism has the mounting panel, the bottom fixed coupling of mounting panel has the connecting rod, the outside fixed coupling of connecting rod has the wind speed detector, and the outside mounting of connecting rod has the plugging mechanism, and the upside mounting of mounting panel has the down mechanism. The device is through the baffle alternate plugging technology, and the dynamic isolation pipe section is accurately wind speed detection in the fan operation, and utilizes mechanical linkage to realize detection unit lifting, and both block airflow interference and keep main air duct seal, realize not to stop machine sectional positioning air leakage point, and the overhaul efficiency and safety are greatly promoted.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction ventilation technology, and more specifically, to a ventilation structure for long-distance, small-section tunnel construction. Background Technology

[0002] In the construction of long-distance, small-section tunnels, ventilation systems are prone to air pressure loss and air leakage due to the long pipeline extension distance and narrow cross-section. Traditional inspection requires stopping the machine and disassembling the air supply pipes in sections, which is not only inefficient, but also has poor accuracy in manually checking for leaks and makes it difficult to locate minor damage. Interruption of ventilation during construction will directly threaten the safety of personnel inside the tunnel and delay the construction period, becoming a key bottleneck restricting the safe progress of the project.

[0003] Existing ventilation systems lack online leak detection capabilities. When the fan power is constant but the air volume drops abnormally, the leak section can only be inferred from experience, resulting in a high degree of blindness in maintenance. In particular, the space is limited in small-section tunnels, making it impossible to deploy complex detection equipment. Therefore, in order to address the above technical problems, a ventilation structure for long-distance small-section tunnel construction is proposed here. Utility Model Content

[0004] The purpose of this utility model is to provide a ventilation structure for long-distance, small-section tunnel construction. Through the alternating baffle sealing technology, the pipe section is dynamically isolated during the operation of the fan for accurate wind speed detection. The detection unit is raised and lowered by mechanical linkage, which not only blocks airflow interference but also keeps the main air duct sealed, enabling segmented location of air leakage points without stopping the machine, and greatly improving maintenance efficiency and safety.

[0005] This utility model is achieved through the following technical solution:

[0006] A ventilation structure for long-distance, small-section tunnel construction includes a support frame fixedly installed inside the tunnel body. A fixed base and an air supply pipe are fixedly connected to the upper side of the support frame. The air supply pipe is fixedly connected to one side of the fixed base. A fan is fixedly installed inside the fixed base. A support base is fixedly connected to the upper side of the air supply pipe. An installation base is fixedly connected to the upper side of the support base. A first connecting groove is formed between the installation base and the support base. A second connecting groove is formed between the air supply pipe and the support base. A pull-back mechanism is installed inside the installation base. An installation plate is connected to the bottom of the pull-back mechanism. A connecting rod is fixedly connected to the bottom of the installation plate, and the connecting rod is located inside the first connecting groove, the support base, and the second connecting groove. A wind speed detector is fixedly connected to the outside of the connecting rod. A sealing mechanism is installed outside the connecting rod. A pressing mechanism is installed on the upper side of the installation plate.

[0007] Preferably, the number of the support bases is several groups arranged at equal intervals.

[0008] Preferably, the pull-back mechanism includes a tension spring and a telescopic rod, the tension spring and the telescopic rod being fixedly connected to the inner top of the mounting base, and the mounting plate being fixedly connected to the bottom of the tension spring and the telescopic rod.

[0009] Preferably, the blocking mechanism includes a first baffle and a second baffle, both of which are fixedly connected to the outside of the connecting rod.

[0010] Preferably, the first baffle is slidably connected to the inner side of the support base, and the second baffle abuts against the top of the inner side of the air duct and seals the second connecting groove.

[0011] Preferably, the pressing mechanism includes a rotating shaft and a support rod. The rotating shaft is rotatably connected to the inner side of the mounting base and is mounted above the mounting plate. The support rod is fixedly connected to the outside of the rotating shaft, and the end of the support rod is smoothed.

[0012] Preferably, a drive motor is fixedly connected to the outside of the mounting base, and the rotating shaft is fixedly connected to one side of the output shaft of the drive motor.

[0013] The technical solution of this utility model has at least the following beneficial effects:

[0014] This invention proposes a ventilation structure for long-distance, small-section tunnel construction. Through a baffle linkage structure, it achieves online segmented wind speed detection, accurately locating air leaks in the air supply pipe without stopping the machine, significantly improving maintenance efficiency. During the detection process, airflow interference is avoided, ensuring accurate and reliable measurement results. The lifting design allows the anemometer to quickly enter and exit the air duct while maintaining pipe sealing, ensuring uninterrupted ventilation. The entire detection process is highly automated and easy to operate, effectively solving the problems of low efficiency and poor accuracy in traditional manual inspection. It significantly improves the safety and continuity of ventilation during long-distance tunnel construction, providing a reliable guarantee for rapid maintenance in complex environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a partial side sectional view of the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of A in the middle;

[0019] Reference numerals in the attached drawings: 1. Tunnel main body; 2. Support frame; 3. Fixed seat; 4. Air supply pipe; 5. Fan; 6. Support seat; 7. Mounting seat; 8. First connecting groove; 9. Second connecting groove; 10. First baffle; 11. Connecting rod; 12. Mounting plate; 13. Tension spring; 14. Telescopic rod; 15. Second baffle; 16. Wind speed detector; 17. Drive motor; 18. Rotating shaft; 19. Support rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-4 This utility model proposes a ventilation structure for long-distance, small-section tunnel construction, including a support frame 2 fixedly installed inside the tunnel body 1. The support frame 2 serves as the basic support frame for the entire ventilation structure. A fixed seat 3 and an air supply pipe 4 are fixedly connected to the upper side of the support frame 2. The fixed seat 3 is used to fix a fan 5 and provide a stable installation foundation. The air supply pipe 4 serves as the main ventilation duct responsible for transporting airflow. The air supply pipe 4 is fixedly connected to one side of the fixed seat 3. The fan 5 is fixedly installed inside the fixed seat 3. The fan 5 serves as the core power source to provide airflow power for the entire ventilation system. A support seat 6 is fixedly connected to the upper side of the air supply pipe 4. The support seat 6 serves as the installation platform for the detection unit.

[0022] A mounting base 7 is fixedly connected to the upper side of the support base 6. The mounting base 7 provides a sealed installation space for the detection mechanism. A first connecting groove 8 is provided between the mounting base 7 and the support base 6. The first connecting groove 8 provides a channel for the connecting rod 11 to move up and down. A second connecting groove 9 is provided between the air supply pipe 4 and the support base 6. The second connecting groove 9 serves as an airflow channel to connect the air supply pipe 4 and the detection unit. A pull-back mechanism is installed on the inner side of the mounting base 7. The pull-back mechanism is used to realize the automatic reset function of the detection unit.

[0023] The bottom of the pull-back mechanism is connected to a mounting plate 12, which serves as a fixed platform for the connecting rod 11. The bottom of the mounting plate 12 is fixedly connected to the connecting rod 11, which serves as the core transmission component of the detection unit. The connecting rod 11 is located inside the first connecting groove 8, the support seat 6, and the second connecting groove 9. An anemometer 16 is fixedly connected to the outside of the connecting rod 11. The anemometer 16 is used to monitor the changes in wind speed inside the air duct 4 in real time. A sealing mechanism is installed on the outside of the connecting rod 11. The sealing mechanism realizes the airflow isolation function of the detection area. A pressing mechanism is installed on the upper side of the mounting plate 12. The pressing mechanism provides the downward power for the detection unit.

[0024] The number of support seats 6 is several groups arranged at equal intervals. The distribution of support seats 6 ensures comprehensive inspection coverage of the entire air duct 4.

[0025] The pull-back mechanism includes a tension spring 13 and a telescopic rod 14. The tension spring 13 provides the reset force for the detection unit, and the telescopic rod 14 ensures the vertical movement trajectory of the connecting rod 11. The tension spring 13 and the telescopic rod 14 are fixedly connected to the inner top of the mounting base 7, and the mounting plate 12 is fixedly connected to the bottom of the tension spring 13 and the telescopic rod 14.

[0026] The sealing mechanism includes a first baffle 10 and a second baffle 15. The first baffle 10 seals the lower part of the detection area, and the second baffle 15 maintains the pipe sealing in the non-detection state. Both the first baffle 10 and the second baffle 15 are fixedly connected to the outside of the connecting rod 11.

[0027] The first baffle 10 is slidably connected to the inner side of the support base 6, and the second baffle 15 abuts against the top of the inner side of the air duct 4 and seals the second connecting groove 9. This combination ensures airtight isolation during testing.

[0028] The pressing mechanism includes a rotating shaft 18 and a support rod 19. The rotating shaft 18 serves as the central component for power transmission, and the support rod 19 converts the rotational motion into downward force. The rotating shaft 18 is rotatably connected to the inner side of the mounting base 7 and is mounted above the mounting plate 12. The support rod 19 is fixedly connected to the outside of the rotating shaft 18, and the end of the support rod 19 is smoothed to reduce frictional loss.

[0029] The mounting base 7 is externally fixedly connected to a drive motor 17, which provides power for the entire detection action, and the rotating shaft 18 is fixedly connected to one side of the output shaft of the drive motor 17.

[0030] The working principle of a ventilation structure for long-distance, small-section tunnel construction based on an embodiment is as follows: when the power of the fan 5 is stable but the ventilation volume in the tunnel is abnormally reduced, it is necessary to check for leaks in sections of the air supply pipe 4. At this time, the corresponding drive motors 17 at each section of the air supply pipe 4 are started in sequence, driving the rotating shaft 18 to rotate, so that the support rod 19 presses down on the mounting plate 12. Under the guidance of the telescopic rod 14, the mounting plate 12 moves down against the tension of the tension spring 13, driving the connecting rod 11 to move down along the first connecting groove 8. The second baffle 15 at the end of the connecting rod 11 then detaches from the top of the air supply pipe 4, while the first baffle 10 in the middle section moves down to abut the upper surface of the air supply pipe 4, completely sealing the second connecting groove 9.

[0031] During this process, the anemometer 16, fixed to the connecting rod 11, simultaneously enters the internal space of the air duct 4. Since the first baffle 10 blocks the airflow channel of the second connecting groove 9, the detection environment is isolated from the main air duct. The anemometer 16 can accurately measure the actual wind speed of this section of the duct without interference. After the detection is completed, the drive motor 17 reverses to reset the support rod 19, the tension spring 13 retracts and drives the mounting plate 12 to rise, and the connecting rod 11 moves upward. At this time, the first baffle 10 is removed from the air duct 4, and the second baffle 15 re-seals the second connecting groove 9, which restores ventilation and avoids affecting the detection of adjacent pipe sections. By driving the detection unit at the support seat 6 section by section, the air leakage point can be quickly located for targeted repair, effectively ensuring the safety of tunnel construction.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation structure for long-distance, small-section tunnel construction, characterized in that: The system includes a support frame (2) fixedly installed inside the tunnel body (1). A fixed base (3) and an air supply pipe (4) are fixedly connected to the upper side of the support frame (2). The air supply pipe (4) is fixedly connected to one side of the fixed base (3). A fan (5) is fixedly installed inside the fixed base (3). A support seat (6) is fixedly connected to the upper side of the air supply pipe (4). A mounting seat (7) is fixedly connected to the upper side of the support seat (6). A first connecting groove (8) is formed between the mounting seat (7) and the support seat (6). The air supply pipe (4) and the support seat... A second connecting groove (9) is provided between (6). A pull-back mechanism is installed on the inner side of the mounting base (7). A mounting plate (12) is connected to the bottom of the pull-back mechanism. A connecting rod (11) is fixedly connected to the bottom of the mounting plate (12). The connecting rod (11) is located inside the first connecting groove (8), the support base (6), and the second connecting groove (9). A wind speed detector (16) is fixedly connected to the outside of the connecting rod (11). A sealing mechanism is installed on the outside of the connecting rod (11). A pressing mechanism is installed on the upper side of the mounting plate (12).

2. The ventilation structure for long-distance, small-section tunnel construction according to claim 1, characterized in that: The number of the support bases (6) is several groups arranged at equal intervals.

3. The ventilation structure for long-distance, small-section tunnel construction according to claim 1, characterized in that: The pull-back mechanism includes a tension spring (13) and a telescopic rod (14). The tension spring (13) and the telescopic rod (14) are fixedly connected to the top inner side of the mounting base (7), and the mounting plate (12) is fixedly connected to the bottom of the tension spring (13) and the telescopic rod (14).

4. The ventilation structure for long-distance, small-section tunnel construction according to claim 1, characterized in that: The blocking mechanism includes a first baffle (10) and a second baffle (15), both of which are fixedly connected to the outside of the connecting rod (11).

5. The ventilation structure for long-distance, small-section tunnel construction according to claim 4, characterized in that: The first baffle (10) is slidably connected to the inner side of the support base (6), and the second baffle (15) abuts against the top of the inner side of the air duct (4) and blocks the second connecting groove (9).

6. The ventilation structure for long-distance, small-section tunnel construction according to claim 1, characterized in that: The pressing mechanism includes a rotating shaft (18) and a support rod (19). The rotating shaft (18) is rotatably connected to the inner side of the mounting base (7) and is mounted above the mounting plate (12). The support rod (19) is fixedly connected to the outside of the rotating shaft (18) and the end of the support rod (19) is smoothed.

7. The ventilation structure for long-distance, small-section tunnel construction according to claim 6, characterized in that: The mounting base (7) is externally fixedly connected to a drive motor (17), and the rotating shaft (18) is fixedly connected to one side of the output shaft of the drive motor (17).

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