Air supplement device for long-distance tunneling tunnel
The combined use of exhaust fans, exhaust pipes and support components solves the problem of poor ventilation in long-distance shield tunnels, achieves efficient ventilation control and safe construction, and is suitable for tunnel environments of different lengths.
Patent Information
- Application Number
- CN202422730001.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-09
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-09
AI Technical Summary
During the construction of long-distance shield tunnels, traditional ventilation methods lead to the accumulation of hot and humid air, resulting in poor ventilation effects, increased construction costs and detrimental to personnel safety. Existing ventilation systems make it difficult to effectively control the wind direction and flow rate.
The exhaust fan, exhaust pipe and support assembly are used in combination. The exhaust pipe opening is ensured to be aligned with the source of polluted air through the extension and adjustment of the support assembly. Multiple groups of support assemblies and exhaust pipes are linked to control the flow direction and velocity of polluted air. The exhaust efficiency is improved by combining with the fan motor assembly, and dust is filtered through the dust filter assembly.
It effectively reduces the distance of polluted air circulation, improves ventilation effect, reduces construction costs, enhances construction safety, is suitable for tunnels of different lengths, and improves the flexibility and applicability of the ventilation system.
Smart Images
Figure CN223410881U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of air supply devices, and in particular to an air supply device for long-distance tunneling. Background Art
[0002] At present, shield tunneling has been widely used in urban rail transit, water, electricity, gas pipelines and other fields. The advantages of shield tunneling are more obvious in the construction of tunnels with a length of more than 750 meters. Therefore, more and more long-distance or ultra-long-distance shield tunnel projects have emerged.
[0003] During shield tunneling, the operating power of a shield machine can reach thousands of kilowatts, releasing enormous amounts of heat. Long tunnels increase frictional resistance to airflow, leading to high temperatures, humidity, and turbid air at the tunnel working surface. This prevents workers from performing their tasks and increases equipment failure rates, severely impacting the safety of construction workers and limiting shield tunneling efficiency. If a fire or a sudden encounter with toxic or hazardous gas formations occurs within the tunnel, the gases will fill the tunnel. Long tunnels hinder escape and can easily lead to accidents.
[0004] Currently, traditional tunnel ventilation in construction mostly uses a ventilation shaft supply and exhaust longitudinal ventilation method. Supply and exhaust shafts are set up approximately 50 meters apart, and jet fans are used to create short-circuit airflow, forming a ventilation system. However, when this method is applied to long-distance or ultra-long-distance shield tunnels, the frequent installation of supply shafts not only greatly increases construction costs but also leads to irrational resource and cost allocation. If the spacing between exhaust and supply shafts is increased, the wind flow and direction cannot be effectively controlled, which greatly reduces the ventilation effect. Moreover, this exhaust method is not effective for air circulation at working surfaces deep within the construction site. Utility Model Content
[0005] In order to reduce the ventilation cost of long tunnels and improve ventilation efficiency, the present application provides an air supply device for long-distance tunneling.
[0006] The present application provides an air supply device for long-distance tunneling, which adopts the following technical solutions:
[0007] A ventilation device for long-distance tunnel excavation includes an exhaust fan located on the ground, an exhaust pipe connected to the exhaust fan and located in the tunnel, and a support assembly supporting the exhaust pipe. The support assembly includes a base, a lower telescopic rod connected to the base, an upper telescopic rod connected to the lower telescopic rod, and a fixing ring fixedly connected to the top end of the upper telescopic rod. The top end of the lower telescopic rod is downwardly provided with a first groove for the upper telescopic rod to move up and down. The upper and lower telescopic rods are fixed by bolts, and the fixing ring is connected to the exhaust pipe.
[0008] By adopting the above technical solution, the present application uses an exhaust fan, an exhaust pipe and a support assembly in combination, aligns the exhaust pipe opening with the position where air needs to be extracted, turns on the exhaust fan, and thereby discharges the polluted air that needs to be replaced from the exhaust duct relatively close to the construction work surface, greatly reducing the circulation distance of the polluted air. In addition, the present application is provided with an exhaust pipe, which effectively controls the flow direction and flow rate of the polluted air, and achieves a better ventilation effect.
[0009] In addition, the support assembly in the present application can also be telescopic. According to the height of the tunnel and the position where exhaust is required, the upper telescopic rod can be moved up and down in the first groove in the lower telescopic rod, the position of the fixing ring and the exhaust pipe can be determined, and then the upper telescopic rod and the lower telescopic rod can be fixed with bolts to complete the adjustment process; the support assembly in the present application occupies a small area, can be extended and retracted up and down, can be twisted left and right, is easy to move, and is flexible to use on site.
[0010] Optionally, a fixing nail is fixedly connected to the bottom of the base.
[0011] By adopting the above technical solution, the fixing nails are inserted into the ground to fix the base, thereby increasing the stability of the support assembly.
[0012] Optionally, a rubber ring is fixedly connected to the bottom of the lower telescopic rod, a second groove for accommodating the bottom of the lower telescopic rod is provided on the base, and a ring groove for accommodating the rubber ring is provided on the vertical side wall of the second groove. The ring groove is tightly abutted against the rubber ring, and the bottom of the lower telescopic rod can rotate in the second groove.
[0013] By adopting the above technical solution, the base is fixed, which limits the rotation of the support assembly. The present application restores the function of the support assembly to rotate left and right by setting a second groove and allowing the lower telescopic rod to rotate in the second groove. The present application also sets a circle of rubber ring at the bottom of the lower telescopic rod, and limits the movement of the rubber ring through the annular groove, thereby reducing the possibility of the lower telescopic rod detaching from the second groove and increasing the stability of the lower telescopic rod in the second groove.
[0014] Optionally, the support components are arranged into multiple groups, and the exhaust pipes are arranged into multiple groups accordingly. One end of the fixing ring on the support component at the air suction port is clamped with the exhaust pipe, and the other end is clamped with an air expansion nozzle. The remaining fixing rings on each of the support components are connected to two adjacent exhaust pipes.
[0015] By adopting the above technical solution, the present application sets up multiple groups of support components and multiple groups of exhaust pipes for use in combination, so that the air supply device is suitable for tunnels of different lengths, thereby improving the applicability of the air supply device.
[0016] Optionally, a fan motor assembly is also fixedly installed in the fixing ring.
[0017] By adopting the above technical solution, the combination of multiple fan motor assemblies and exhaust fans further improves the exhaust efficiency.
[0018] Optionally, the cross section of the rubber ring is semicircular.
[0019] By adopting the above technical solution, the present application sets the cross section of the rubber ring to be semicircular, which facilitates the insertion of the lower telescopic rod into the first groove and the installation of the lower telescopic rod and the base.
[0020] Optionally, the exhaust pipe is a plastic telescopic pipe.
[0021] By adopting the above technical solution, the plastic is light and durable, and the exhaust pipe is retractable, which is convenient for use in tunnels of different lengths.
[0022] Optionally, a dust filter assembly is fixedly installed in the exhaust fan.
[0023] By adopting the above technical solution, the dust filter component absorbs and filters most of the dust in the polluted air, reducing air pollution.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. This application uses an exhaust fan, an exhaust pipe, and a support assembly in combination. The exhaust pipe opening is aimed at the location where air needs to be extracted, and the exhaust fan is turned on, thereby discharging the polluted air that needs to be replaced from the exhaust duct relatively close to the construction work surface, greatly reducing the circulation distance of the polluted air. In addition, this application is equipped with an exhaust pipe to effectively control the flow direction and flow rate of the polluted air, and the ventilation effect is better;
[0026] 2. The support assembly in the present application can also be retracted. According to the height of the tunnel and the position where exhaust is required, the upper telescopic rod can be moved up and down in the first groove in the lower telescopic rod, the position of the fixing ring and the exhaust pipe can be determined, and then the upper telescopic rod and the lower telescopic rod can be fixed with bolts to complete the adjustment process; the support assembly in the present application occupies a small area, can be retracted up and down, can be twisted left and right, is easy to move, and is flexible to use on site. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural diagram of an embodiment of the present application;
[0028] Figure 2 is a schematic diagram showing the structure of a support assembly according to an embodiment of the present application;
[0029] Figure 3 It is a structural schematic diagram showing the ring groove and the rubber ring according to an embodiment of the present application.
[0030] In the figure, 1. exhaust fan; 2. exhaust pipe; 3. support assembly; 31. base; 311. fixing nail; 312. second groove; 313. ring groove; 32. lower telescopic rod; 322. rubber ring; 321. first groove; 33. upper telescopic rod; 34. fixing ring; 4. air diffuser; 5. fan motor assembly. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-3 This application is described in further detail.
[0032] The embodiment of the present application discloses an air supply device for long-distance tunnel excavation.
[0033] like Figure 1 As shown, an air supply device for long-distance tunnel excavation includes an exhaust fan 1 located on the ground, an exhaust pipe 2 connected to the exhaust fan 1 and located in the tunnel, and a support assembly 3 supporting the exhaust pipe 2. The support assembly 3 is arranged in multiple groups, and the exhaust pipe 2 is arranged in multiple groups accordingly.
[0034] When it is necessary to discharge the polluted air in the tunnel, align the exhaust pipe 2 with the position where air needs to be extracted, turn on the exhaust fan 1, and thus discharge the polluted air that needs to be replaced from the exhaust duct relatively close to the construction work surface, greatly reducing the circulation distance of the polluted air. In addition, the present application is provided with an exhaust pipe 2 to effectively control the flow direction and flow rate of the polluted air, and the ventilation effect is better.
[0035] like Figure 1 and Figure 2 As shown, the support assembly 3 includes a base 31, a lower telescopic rod 32 connected to the base 31, an upper telescopic rod 33 connected to the lower telescopic rod 32, and a fixing ring 34 fixedly connected to the top of the upper telescopic rod 33. The top of the lower telescopic rod 32 has a first groove 321 defined downwardly, and the upper telescopic rod 33 can move up and down within the first groove 321. The upper and lower telescopic rods 33 and 32 are fixed by bolts. The fixing ring 34 on the support assembly 3 at the air intake is engaged with the outlet of the exhaust pipe 2 at one end and with the air diffuser 4 at the other end. The fixing ring 34 on each of the remaining support assemblies 3 is engaged with two adjacent exhaust pipes 2.
[0036] The support assembly 3 is telescopic. According to the height of the tunnel and the position where exhaust is required, the upper telescopic rod 33 can be moved up and down in the first groove 321 in the lower telescopic rod 32, the position of the fixing ring 34 and the exhaust pipe 2 is determined, and then the upper telescopic rod 33 and the lower telescopic rod 32 are fixed with bolts to complete the adjustment process; the support assembly 3 in this application occupies a small area, can be extended and retracted up and down, can be twisted left and right, is easy to move, and is flexible to use on site; this application sets up multiple groups of support assemblies 3 and multiple groups of exhaust pipes 2 for use in combination, so that the air supply device is suitable for tunnels of different lengths, thereby improving the applicability of the air supply device.
[0037] The exhaust pipe 2 is a plastic telescopic pipe. The plastic is light and durable. The exhaust pipe 2 is telescopic and can be easily adapted to tunnels of different lengths.
[0038] like Figure 2 and Figure 3 As shown, a fixing nail 311 is fixedly connected to the bottom of the base 31, and a circle of rubber ring 322 is fixedly connected to the bottom of the lower telescopic rod 32. The cross-section of the rubber ring 322 is semicircular. A second groove 312 is provided on the base 31 to accommodate the bottom of the lower telescopic rod 32. A circle of annular groove 313 capable of accommodating the rubber ring 322 is provided on the vertical side wall of the second groove 312. The rubber ring 322 is tightly abutted against the annular groove 313. When a certain degree of external force is applied to the bottom of the lower telescopic rod 32, the lower telescopic rod 32 can rotate in the second groove 312.
[0039] The support assembly 3 can rotate left and right, making it convenient for the air diffuser 4 to be aligned with the location where dust is generated, thereby facilitating the discharge of polluted air, and limiting the movement of the rubber ring 322 through the annular groove 313, thereby reducing the possibility of the lower telescopic rod 32 detaching from the second groove 312, and increasing the stability of the lower telescopic rod 32 in the second groove 312.
[0040] like Figure 1 and Figure 2 As shown, a fan motor assembly 5 is also fixedly mounted within the fixing ring 34. The combination of multiple fan motor assemblies 5 and the exhaust fan 1 further improves exhaust efficiency. A dust filter assembly (not shown) is fixedly mounted within the exhaust fan 1. This filter absorbs and filters most of the dust in the polluted air, reducing air pollution.
[0041] The implementation principle of an air supply device for a long-distance tunnel excavation in an embodiment of the present application is as follows: according to the height of the tunnel and the position where exhaust is required, the upper telescopic rod 33 is moved up and down in the first groove 321 in the lower telescopic rod 32, the position of the fixing ring 34 and the exhaust pipe 2 is determined, and then the upper telescopic rod 33 and the lower telescopic rod 32 are fixed with bolts to complete the adjustment process, and the exhaust fan 1 and the fan motor assembly 5 are turned on to discharge the polluted air that needs to be replaced from the exhaust duct relatively close to the construction work surface.
[0042] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. An air supply device for long-distance tunneling, characterized by: The invention comprises an exhaust fan (1) located on the ground, an exhaust pipe (2) connected to the exhaust fan (1) and located in a tunnel, and a support assembly (3) supporting the exhaust pipe (2), wherein the support assembly (3) comprises a base (31), a lower telescopic rod (32) connected to the base (31), an upper telescopic rod (33) connected to the lower telescopic rod (32), and a fixing ring (34) fixedly connected to the top of the upper telescopic rod (33), a first groove (321) for the upper telescopic rod (33) to move up and down is formed downward at the top of the lower telescopic rod (32), the upper telescopic rod (33) and the lower telescopic rod (32) are fixed by bolts, and the fixing ring (34) is connected to the exhaust pipe (2).
2. The air supply device for long-distance tunneling according to claim 1, characterized in that: A fixing nail (311) is fixedly connected to the bottom of the base (31).
3. The air supply device for long-distance tunneling according to claim 2, characterized in that: The bottom of the lower telescopic rod (32) is fixedly connected to a circle of rubber ring (322); the base (31) is provided with a second groove (312) for accommodating the bottom of the lower telescopic rod (32); the vertical side wall of the second groove (312) is provided with a circle of annular groove (313) capable of accommodating the rubber ring (322); the annular groove (313) is in close contact with the rubber ring (322); and the bottom of the lower telescopic rod (32) can rotate in the second groove (312).
4. The air supply device for long-distance tunneling according to claim 1 is characterized in that: The support components (3) are arranged in multiple groups, and the exhaust pipes (2) are arranged in multiple groups accordingly. One end of the fixing ring (34) on the support component (3) at the air inlet is clamped with the exhaust pipe (2), and the other end is clamped with the air expansion nozzle (4). The other fixing rings (34) on each of the support components (3) are connected to two adjacent exhaust pipes (2).
5. The air supply device for long-distance tunneling according to claim 2, characterized in that: A fan motor assembly (5) is also fixedly installed in the fixing ring (34).
6. The air supply device for long-distance tunneling according to claim 3, characterized in that: The cross section of the rubber ring (322) is semicircular.
7. The air supply device for long-distance tunneling according to claim 1, characterized in that: The exhaust pipe (2) is a plastic telescopic pipe.
8. The air supply device for long-distance tunneling according to claim 1, characterized in that: A dust filter assembly is fixedly installed in the exhaust fan (1).