Cold-resistant and anti-freezing tunnel drainage blind pipe

Abstract

The utility model relates to the technical field of cold-proof drainage pipelines, and discloses a cold-proof anti-freezing tunnel drainage blind pipe which comprises a pipeline body, a connecting shell is fixedly connected to the front end of the pipeline body, exhaust holes are formed in the four sides of the outer wall of the rear end of the pipeline body, and blades are connected to a gas transmission set on the inner wall of the connecting shell. Supporting pipes are rotationally connected to the outer walls of the blades, a heat preservation layer is arranged on the outer side of the pipeline body, and a ventilation frame is arranged on the inner side of the heat preservation layer. According to the utility model, continuous heating and air renewal in the pipeline are realized, the cold-proof effect of the pipeline is maintained, the adaptability and the flexibility of the pipeline are improved, the functionality and the safety of the pipeline can be effectively maintained under different environmental conditions, the service life of the pipeline in the conveying process can be remarkably prolonged, and the pipeline is convenient to use. And long-term reliable operation is ensured, so that the pipeline not only can cope with complex environmental conditions.

Description

Technical Field

[0001] This utility model relates to the field of cold-proof drainage pipe technology, and in particular to a cold-resistant and frost-proof tunnel drainage blind pipe. Background Technology

[0002] Cold-resistant and frost-resistant tunnel drainage blind pipes are a type of pipe specifically designed for waterproofing and drainage in tunnels in cold regions. In tunnel construction, especially in cold regions or areas with large seasonal temperature differences, the proper drainage of groundwater and the waterproofing of the tunnel's internal structure are crucial technical aspects. These not only directly affect the safety of the tunnel project but also its service life.

[0003] A search revealed a cold-resistant and frost-proof tunnel drainage blind pipe (publication number CN219865148U), comprising a blind pipe body, an outer insulating layer for filtering impurities in seepage water, a heating component for heating the blind pipe body between the insulating layer and the blind pipe body, and permeable holes on the side wall of the blind pipe body. This application has the effect of reducing the occurrence of poor seepage in tunnel surrounding rock due to freezing of the blind pipe.

[0004] Based on the aforementioned patent, seepage water from the surrounding rock of the tunnel flows into the blind pipe body through permeable holes. The heating wire heats the blind pipe body, thereby reducing the possibility of seepage water freezing inside the blind pipe body and keeping the water inside the blind pipe body in a flowing state, reducing the occurrence of blind pipe freezing problems. However, when the heating wire used in the patent is used for heating, different pipe lengths need to be produced due to different requirements, which means that the pipe needs to be produced with corresponding heating wires. When the produced pipes are actually assembled, if it is necessary to shorten the pipe, a part of the pipe must be cut off. The heating wire is cut off or exposed to the environment, affecting the heating effect of the device and causing the pipe's cold resistance to decrease. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cold-resistant and antifreeze tunnel drainage blind pipe. This pipe achieves continuous heating and air renewal inside the pipe, maintaining its cold-resistant effect, improving its adaptability and flexibility, ensuring that it can effectively maintain its functionality and safety under different environmental conditions, and significantly extending its service life during transportation. This ensures long-term reliable operation and enables the pipe to cope with complex environmental conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A cold-resistant and frost-proof tunnel drainage blind pipe includes a pipe body, a connecting shell fixedly connected to the front end of the pipe body, and exhaust holes on all four sides of the outer wall of the rear end of the pipe body. A blade is connected to the air supply assembly on the inner wall of the connecting shell, and a support pipe is rotatably connected to the outer wall of the blade. An insulation layer is provided on the outer side of the pipe body, and a ventilation frame is provided on the inner side of the insulation layer.

[0008] Furthermore, the gas delivery unit includes a drive motor fixedly connected to the inner wall of the connecting shell, and a transmission gear is fixedly connected to the drive end of the drive motor.

[0009] Furthermore, a gear ring is fixedly connected to the inner diameter of the blade, and the gear ring and the transmission gear are meshed together.

[0010] Furthermore, dust filters are fixedly connected to all four sides of the outer wall of the connecting shell, and electrode points are provided at the front end of the connecting shell.

[0011] Furthermore, a heater is installed on the rear end of the inner wall of the connecting shell, and a connecting groove is provided on all four sides of the rear end of the connecting shell.

[0012] Furthermore, a polypropylene layer is provided on the inner side of the ventilation frame, and a nylon mesh is provided on the inner side of the polypropylene layer.

[0013] Furthermore, an EPDM rubber layer is provided on the inner side of the nylon mesh, a reinforcing rib is provided on the inner side of the EPDM rubber layer, and a polyvinylidene fluoride layer is provided on the inner side of the reinforcing rib.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, the drive motor is started, which drives the transmission gear to rotate the gear ring, thereby causing the blades to rotate and drawing air in from the dust filter. When the heater is started, the temperature inside the connecting shell rises, and the wind force generated by the blades transports the high-temperature air from the connecting groove to the space between the insulation layer and the ventilation frame, increasing the temperature inside the pipe body. The air is finally discharged from the exhaust port. After the staff cuts the pipe length, they can drill new exhaust ports themselves to ensure that the pipe body still maintains the cold protection effect after being cut off.

[0016] 2. In this utility model, the polypropylene layer has a high melting point and good rigidity, and is impact resistant at low temperatures. The nylon mesh supports the stability of the pipe body. The EPDM rubber layer is weather resistant, ozone resistant, and low temperature resistant, and is not easy to age or crack. The reinforcing ribs improve the strength of the polyvinylidene fluoride layer, making it resistant to chemical corrosion, heat, and mechanical wear, thus extending the service life of the pipe. Attached Figure Description

[0017] Figure 1 A perspective view of a cold-resistant and frost-proof tunnel drainage blind pipe proposed in this utility model;

[0018] Figure 2 This is a half-sectional view of the connecting shell of a cold-resistant and frost-proof tunnel drainage blind pipe proposed in this utility model;

[0019] Figure 3 This is a half-sectional view of the support pipe of a cold-resistant and frost-proof tunnel drainage blind pipe proposed in this utility model;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a cross-sectional view of the insulation layer of a cold-resistant and frost-proof tunnel drainage blind pipe proposed in this utility model;

[0022] Figure 6 This is a cross-sectional view of the polypropylene layer of a cold-resistant and frost-proof tunnel drainage blind pipe proposed in this utility model.

[0023] Figure 7 This is a schematic diagram of the reinforcing rib structure of a cold-resistant and frost-proof tunnel drainage blind pipe proposed in this utility model.

[0024] Legend:

[0025] 1. Pipe body; 2. Connecting shell; 3. Exhaust port; 4. Dust filter; 5. Electrode point; 6. Gear ring; 7. Blade; 8. Heater; 9. Connecting groove; 10. Support pipe; 11. Drive motor; 12. Transmission gear; 13. Insulation layer; 14. Ventilation frame; 15. Polypropylene layer; 16. Nylon mesh; 17. EPDM rubber layer; 18. Reinforcing rib; 19. Polyvinylidene fluoride layer. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1-3 This utility model provides an embodiment of a cold-resistant and frost-proof tunnel drainage blind pipe, comprising a pipe body 1, a connecting shell 2 fixedly connected to the front end of the pipe body 1, and vent holes 3 on all four sides of the outer wall of the rear end of the pipe body 1. A drive motor 11 is fixedly connected to the inner wall of the connecting shell 2. (Refer to...) Figure 4The drive motor 11 is fixedly connected to the drive end of the transmission gear 12. The inner diameter of the blade 7 is fixedly connected to the gear ring 6. The gear ring 6 and the transmission gear 12 are meshed. The four sides of the outer wall of the connecting shell 2 are fixedly connected to the dust filter screen 4. The front end of the connecting shell 2 is provided with the electrode point 5. The rear end of the inner wall of the connecting shell 2 is installed with the heater 8. The four sides of the rear end of the connecting shell 2 are provided with the connecting groove 9. The outer wall of the blade 7 is rotatably connected to the support tube 10.

[0028] Specifically: Electrode point 5 serves as the power input point, providing necessary power support for the entire system. When the power is turned on, the drive motor 11 and heater 8 start working. After the drive motor 11 starts, it drives the transmission gear 12 to rotate through its output shaft, which in turn drives the gear ring 6 to rotate. The rotation of the gear ring 6 drives the blades 7 connected to it to rotate. The rotation of the blades 7 generates negative pressure, drawing in external air from the dust filter 4. At the same time, after the heater 8 starts, the heat it generates causes the ambient temperature inside the connecting shell 2 to gradually rise. As the blades 7 continue to rotate, the generated wind force transports the high-temperature air inside the connecting shell 2 through the connecting groove 9 to the space between the insulation layer 13 and the ventilation frame 14. This process not only increases the internal temperature of the pipe body 1, but also ensures air circulation. The high-temperature air circulates inside the pipe and is eventually discharged through the exhaust port 3, thus achieving continuous heating and air renewal inside the pipe. In practical applications, if workers need to shorten the pipe length according to the site conditions, they can drill new exhaust ports 3 at appropriate locations. In this way, even if the pipe body 1 is cut off, the new exhaust ports 3 can still ensure air circulation and temperature maintenance inside the pipe, thereby maintaining the pipe's cold-proof effect. This design not only improves the adaptability and flexibility of the pipe, but also ensures that the functionality and safety of the pipe can be effectively maintained under different environmental conditions.

[0029] Reference Figures 5-7 An insulation layer 13 is provided on the outside of the pipe body 1. A ventilation frame 14 is provided on the inside of the insulation layer 13. A polypropylene layer 15 is provided on the inside of the ventilation frame 14. A nylon mesh 16 is provided on the inside of the polypropylene layer 15. An EPDM rubber layer 17 is provided on the inside of the nylon mesh 16. A reinforcing rib 18 is provided on the inside of the EPDM rubber layer 17. A polyvinylidene fluoride layer 19 is provided on the inside of the reinforcing rib 18.

[0030] Specifically: the polypropylene layer 15 has a high melting point and good rigidity, while maintaining a certain impact resistance in low-temperature environments, ensuring the stability and durability of the pipeline under extreme temperature conditions. The nylon mesh 16 effectively supports the internal stability of the pipeline body 1, preventing deformation and damage caused by external forces or changes in internal pressure. The EPDM rubber layer 17 has excellent weather resistance, ozone resistance, and low-temperature resistance, and can withstand extreme temperature changes without aging or cracking, further enhancing the pipeline's environmental adaptability. The reinforcing ribs 18 improve the robustness of the polyvinylidene fluoride layer 19, enabling it to maintain good structural stability under high pressure and high temperature environments. The polyvinylidene fluoride layer 19 has excellent chemical corrosion resistance, heat resistance, and mechanical properties, which can significantly improve the service life of the pipeline during transportation and ensure long-term reliable operation. This multi-layered structural design allows the pipeline to not only cope with complex environmental conditions but also maintain high efficiency and safety when transporting various corrosive media.

[0031] Working principle: When the drive motor 11 starts, it drives the transmission gear 12 to rotate the gear ring 6, which in turn drives the blades 7 to rotate and draw air in from the dust filter 4. When the heater 8 starts, the ambient temperature inside the connecting shell 2 rises. The airflow generated by the blades 7 then forces the high-temperature air inside the connecting shell 2 through the connecting groove 9 to the space between the insulation layer 13 and the ventilation frame 14, raising the temperature inside the pipe body 1. The transported air is then discharged from the exhaust port 3. After the operator shortens the pipe length, they can manually open the exhaust port 3 to release the air. Even after the pipe body 1 is cut off, it still maintains its cold-proof effect. The polypropylene layer 15 has a high melting point and good rigidity, and can also maintain a certain impact resistance at low temperatures. The nylon mesh 16 can support the internal stability of the pipe body 1. The EPDM rubber layer 17 has excellent weather resistance, ozone resistance and low temperature resistance, and can withstand extreme temperature changes without aging or cracking. The reinforcing rib 18 improves the strength of the polyvinylidene fluoride layer 19. The polyvinylidene fluoride layer 19 has excellent chemical corrosion resistance, heat resistance and mechanical properties, which improves the service life of the pipeline during transportation.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cold-resistant and frost-proof tunnel drainage blind pipe, comprising a pipe body (1), characterized in that: The front end of the pipe body (1) is fixedly connected to a connecting shell (2), and the four sides of the outer wall of the rear end of the pipe body (1) are provided with exhaust holes (3). The inner wall of the connecting shell (2) is connected to a gas transmission group with blades (7). The outer wall of the blades (7) is rotatably connected to a support pipe (10). The outer side of the pipe body (1) is provided with a heat insulation layer (13), and the inner side of the heat insulation layer (13) is provided with a ventilation frame (14).

2. The cold-resistant and frost-proof tunnel drainage blind pipe according to claim 1, characterized in that: The gas delivery unit includes a drive motor (11) fixedly connected to the inner wall of the connecting shell (2), and a transmission gear (12) is fixedly connected to the drive end of the drive motor (11).

3. The cold-resistant and frost-proof tunnel drainage blind pipe according to claim 1, characterized in that: The inner diameter of the blade (7) is fixedly connected to a gear ring (6), and the gear ring (6) and the transmission gear (12) are meshed.

4. The cold-resistant and frost-proof tunnel drainage blind pipe according to claim 1, characterized in that: The connecting shell (2) has dust filters (4) fixedly connected to all four sides of its outer wall, and electrode points (5) are provided at the front end of the connecting shell (2).

5. A cold-resistant and frost-proof tunnel drainage blind pipe according to claim 1, characterized in that: A heater (8) is installed on the rear end of the inner wall of the connecting shell (2), and a connecting groove (9) is provided on all four sides of the rear end of the connecting shell (2).

6. The cold-resistant and frost-proof tunnel drainage blind pipe according to claim 1, characterized in that: The ventilation frame (14) has a polypropylene layer (15) on its inner side, and a nylon mesh (16) is provided on the inner side of the polypropylene layer (15).

7. A cold-resistant and frost-proof tunnel drainage blind pipe according to claim 6, characterized in that: The inner side of the nylon mesh (16) is provided with an EPDM rubber layer (17), the inner side of the EPDM rubber layer (17) is provided with a reinforcing rib (18), and the inner side of the reinforcing rib (18) is provided with a polyvinylidene fluoride layer (19).

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