Tunnel cable trench thermal insulation, temperature control and moisture-proof system

Abstract

The present invention belongs to the technical field of tunnel engineering, and specifically relates to a tunnel cable trench thermal insulation, temperature control and moisture-proof system, including a cable trench thermal insulation module and a cable trench temperature control and moisture-proof module, the cable trench thermal insulation module includes a cable trench cover, an aerogel felt and an elastic member, the elastic member is located between the aerogel felt and the inner wall of the cable trench; the cable trench temperature control and moisture-proof module includes a temperature sensor, a humidity sensor, a controller, a plurality of vents opened on the side wall of the cable trench, an adjustment plate for closing the vents, and a driving assembly for driving the adjustment plate to slide, the controller controls the driving assembly to work according to the temperature sensor and the humidity sensor, the adjustment plate is horizontally slidably connected to the inner wall of the cable trench, and a plurality of ventilation holes are opened on the adjustment plate, and the ventilation holes correspond to the ventilation holes one by one. The present invention has the functions of thermal insulation, temperature control and moisture-proof, and can effectively solve the problem that the cable trench cannot be dehumidified and the cable trench structure is damaged by water freezing in a low temperature environment.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a tunnel cable trench heat insulation, temperature control and moisture-proof system. Background Art

[0002] In the process of tunnel construction in areas with complex geological conditions such as Tibet, Sichuan, and Yunnan, geothermal areas or high-cold areas are inevitably encountered. However, in high-temperature environments, temperature stress causes cracks in concrete structures, and there is a high risk of sudden hot water surges from faults. Leakage water flows into the cable trench along the side walls of the tunnel, posing a threat to the power supply lines in the cable trench. High temperature and humidity conditions accelerate the aging of power supply lines, increasing the workload of maintenance. In high-cold environments, tunnel drainage is poor, underground seepage water seeps out and flows into the cable trench, and the accumulated water in the cable trench freezes in low-temperature environments, damaging the cable trench structure and then the tunnel structure, posing a structural safety hazard. Summary of the invention

[0003] The present invention aims to provide a tunnel cable trench heat insulation, temperature control and moisture-proof system to solve the problem that the tunnel cable trench cannot be dehumidified and the accumulated water freezes and damages the tunnel cable trench structure in a low temperature environment.

[0004] In order to achieve the above-mentioned purpose, the scheme of the present invention is as follows: a tunnel cable trench thermal insulation, temperature control and moisture-proof system, including a cable trench thermal insulation module and a cable trench temperature control and moisture-proof module, the cable trench thermal insulation module includes a cable trench cover, an aerogel felt and a plurality of elastic parts, the plurality of elastic parts are located between the aerogel felt and the inner side wall of the cable trench, the aerogel felt is distributed on the bottom surface of the cable trench cover and the inner side wall of the cable trench, and the part of the aerogel felt distributed on the inner side wall of the cable trench is fixedly connected to the inner side wall of the cable trench; the cable trench temperature control and moisture-proof module includes a temperature sensor, a humidity sensor, a controller, a plurality of vents opened on the side wall of the cable trench, an adjustment plate for closing the vents, and a drive assembly for driving the adjustment plate to slide, the temperature sensor and the humidity sensor are both located in the cable trench, the temperature sensor and the humidity sensor are both connected to the controller signal, the controller controls the operation of the drive assembly according to the temperature sensor and the humidity sensor, the adjustment plate is horizontally slidably connected to the inner side wall of the cable trench, a plurality of ventilation holes are opened on the adjustment plate, and the ventilation holes correspond to the vents one by one.

[0005] The working principle and beneficial effects of this solution are:

[0006] 1) In this solution, the aerogel felt has a low thermal conductivity and excellent thermal insulation effect. Therefore, the aerogel felt is used to insulate the internal space of the cable trench, and the heat emitted by the cable when it is powered on is better retained in the cable trench. In this way, in a low temperature environment, the accumulated water in the cable trench is not easy to freeze, which effectively reduces the impact of the freezing of accumulated water on the cable trench structure. In addition, in this solution, the heat emitted by the cable when it is powered on is used to insulate the internal space of the cable trench, and no additional heating equipment is added, which is more conducive to achieving carbon neutrality.

[0007] 2) In this solution, in the cable trench temperature control and moisture-proof module, the temperature sensor and humidity sensor monitor the temperature and humidity in the cable trench respectively. When the temperature or humidity is too high, the controller controls the driving component to work, and the driving component drives the adjustment plate to slide, so that the ventilation holes on the adjustment plate are highly overlapped with the vents, increasing the exchange volume between the air in the cable trench and the air outside the cable trench, reducing the temperature and humidity in the cable trench, and achieving the purpose of moisture-proof and cooling; and when the humidity is kept below the preset value but the temperature is too low, the driving component drives the adjustment plate to slide, so that the ventilation holes and the vents are completely staggered, thereby reducing the heat loss in the cable trench and increasing the temperature in the cable trench. In this way, the temperature and humidity in the cable trench are controlled, the cable is prevented from being in a high temperature and high humidity environment, and the accumulation of water in the cable trench is also avoided as much as possible. Ice.

[0008] 3) In a low temperature environment, when the heat dissipated by the cable is not enough to resist the low temperature, the accumulated water in the cable trench freezes and the volume of the frozen water increases. During this process, the ice squeezes the aerogel felt. Due to the presence of the elastic part, there is a gap between the aerogel felt and the inner wall of the cable trench, which reserves space for the volume increase during the freezing process of the accumulated water, effectively reducing the damage caused by the frozen water to the cable trench structure.

[0009] Optionally, a frame for the adjustment plate to slide is fixedly connected to the inner wall of the cable trench, and the frame includes an upper L-shaped plate and a lower L-shaped plate. An upper sliding groove for the top end of the adjustment plate to be inserted into is formed between the upper L-shaped plate and the inner wall of the cable trench, and a lower sliding groove for the bottom end of the adjustment plate to be inserted into is formed between the lower L-shaped plate and the inner wall of the cable trench.

[0010] In this solution, the adjustment plate is slidably connected to the inner wall of the cable trench through the frame, and the adjustment plate is not easy to separate from the upper slide groove and the lower slide groove, ensuring that the adjustment plate fits the inner wall of the cable trench.

[0011] Optionally, the driving assembly includes a linear motion actuator and a connecting rod, one end of the connecting rod is fixedly connected to the adjustment plate, and the other end of the connecting rod is fixedly connected to the output end of the linear motion actuator.

[0012] In this solution, the linear motion actuator in the driving assembly works under the control of the controller, and drives the adjustment plate to slide back and forth horizontally through the connecting rod, thereby adjusting the overlap between the air vent and the vent.

[0013] Optionally, the linear motion actuator is an electric push rod or a telescopic cylinder or a telescopic hydraulic cylinder.

[0014] In this solution, the electric push rod, telescopic cylinder and telescopic hydraulic cylinder can all achieve linear reciprocating motion.

[0015] Optionally, the driving assembly includes a gear, a rack and a driving motor for driving the gear to rotate, the gear is meshed with the rack, and the rack is arranged on the adjustment plate.

[0016] In this solution, the driving motor works under the control of the controller, driving the gear to rotate, and the gear and the rack are engaged to achieve horizontal reciprocating sliding of the adjustment plate, thereby adjusting the overlap between the air vents and the vents.

[0017] Optionally, the vent is arranged at an angle, and a high end of the vent is close to the adjustment plate.

[0018] In this solution, the vent is arranged in such a way as to prevent water outside the cable trench from entering the cable trench through the vent.

[0019] Optionally, the system further comprises a water collecting ditch, which is located between the cable trench and the tunnel side wall.

[0020] In this scheme, the drainage ditch is located between the cable trench and the tunnel side wall. Therefore, the leakage water flowing down the tunnel side wall will be accumulated in the drainage ditch and discharged along the drainage ditch to prevent the leakage water flowing down the tunnel side wall from flowing into the cable trench.

[0021] Optionally, the elastic member is a rubber sheet, which is arranged to fit the inner wall of the cable trench, a cavity is arranged inside the rubber sheet, and a vent hole for connecting the cavity with the outside is arranged on the rubber sheet.

[0022] In this solution, when the accumulated water in the cable trench freezes, the ice squeezes the rubber sheet, causing the rubber sheet to become thinner, providing space for the ice to expand, effectively reducing the damage to the cable trench structure caused by the accumulation of water and freezing.

[0023] Optionally, a partition wall is provided in the cable trench, and the partition wall divides the internal space of the cable trench into a cable cavity and a fire-fighting cavity.

[0024] In this solution, the partition wall divides the internal space of the cable trench into a cable cavity and a fire-fighting cavity. In this way, the cable is placed in the cable cavity and the fire-fighting pipe is placed in the fire-fighting cavity, eliminating the hidden danger of fire caused by leakage or burst of the fire-fighting pipe, which may cause the cable to become damp and short-circuit.

[0025] Optionally, a cable bracket for placing cables is provided in the cable trench.

[0026] In this solution, the cables are placed on cable supports to prevent the cables from being laid directly on the bottom wall of the cable trench and being submerged by accumulated water. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a tunnel cable trench heat insulation, temperature control and moisture-proof system in Embodiment 1 of the present invention;

[0028] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0029] Figure 3 for Figure 1 A magnified schematic diagram of B;

[0030] Figure 4 for Figure 1 Right view at the middle adjustment plate;

[0031] Figure 5 A schematic diagram of the structure of the tunnel cable trench heat insulation, temperature control and moisture-proof system in the second embodiment of the present invention;

[0032] Figure 6 It is a schematic structural diagram of the thermal insulation, temperature control and moisture-proof system of the tunnel cable trench in the third embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The marks in the drawings of the specification include: cable trench cover 1, aerogel felt 2, cable trench 3, cable cavity 310, fire cavity 320, partition wall 4, cable bracket 5, cable 6, fire pipe 7, rubber sheet 8, cavity 801, vent 802, temperature sensor 9, humidity sensor 10, controller 11, vent 12, adjustment plate 13, ventilation hole 131, connecting rod 14, electric push rod 15, mounting plate 16, frame 17, upper L-shaped plate 171, lower L-shaped plate 172, tunnel 18, tunnel side wall 19, ditch 20, gear 21, rack 22, drive motor 23.

[0035] Embodiment 1

[0036] This embodiment is basically Figure 1 , Figure 2 and Figure 3As shown: a heat insulation, temperature control and moisture-proof system for a tunnel cable trench, including a cable trench heat insulation module and a cable trench temperature control and moisture-proof module, wherein the cable trench heat insulation module includes a cable trench cover 1, an aerogel felt 2 and a plurality of elastic parts. The cable trench cover 1 covers the top of the cable trench 3, and a partition wall 4 is provided in the cable trench 3. The partition wall 4 divides the internal space of the cable trench 3 into a cable cavity 310 and a firefighting cavity 320. A cable bracket 5 is fixedly installed on the right side wall of the cable cavity 310 (on the left side wall of the partition wall 4) by bolts, so that construction personnel can place the cable 6 on the cable bracket 5. In addition, the firefighting pipe 7 is placed in the firefighting cavity 320, thereby separating the cable 6 from the firefighting pipe 7, and eliminating the hidden danger of fire caused by the leakage or bursting of the firefighting pipe 7, which causes the cable 6 to be damp and short-circuited.

[0037] The elastic member is a rubber sheet 8, which is arranged to fit the inner wall of the cable trench 3. Figure 2 As shown, a cavity 801 is provided inside the rubber sheet 8, and a vent hole 802 is provided on the rubber sheet 8 for connecting the cavity 801 with the outside. Thus, when the rubber sheet 8 is squeezed, the air in the cavity 801 is discharged through the vent hole 802, and the rubber sheet 8 is easily thinned under the squeezing force, thereby providing a deformation space for the increase of the volume of the accumulated water and ice. In addition, in this embodiment, the rubber sheet 8 is pasted on the left inner wall of the cable trench 3 and the right inner wall of the cable trench 3.

[0038] The aerogel felt 2 is a hydrophobic aerogel felt 2, and the aerogel felt 2 is distributed on the bottom surface of the cable trench cover 1 and the inner wall of the cable trench 3. Specifically, in this embodiment, the aerogel felt 2 is attached to the bottom surface of the cable trench cover 1, the aerogel felt 2 is attached to the left inner wall of the cable trench 3, and the aerogel felt 2 is attached to the right inner wall of the cable trench 3. Moreover, only the upper half of the aerogel felt 2 distributed on the left inner wall and the right inner wall of the cable trench 3 is attached to the inner wall of the cable trench 3, and the bottom of the aerogel felt 2 distributed on the left inner wall and the right inner wall of the cable trench 3 is laid on the bottom wall of the cable trench 3. In this way, the rubber sheet 8 is located between the aerogel felt 2 and the inner wall of the cable trench 3.

[0039] The cable trench temperature control and moisture-proof module includes a temperature sensor 9, a humidity sensor 10, a controller 11, a plurality of vents 12 opened on the side wall of the cable trench 3, an adjustment plate 13 for closing the vents 12, and a driving component for driving the adjustment plate 13 to slide. Figure 3 As shown, the vent 12 is tilted, and the left end of the vent 12 is lower than the right end, so as to prevent external water from flowing into the cable trench 3 through the vent 12.

[0040] The driving assembly includes a linear motion actuator and a connecting rod 14, one end of the connecting rod 14 is fixedly connected to the adjustment plate 13, and the other end of the connecting rod 14 is fixedly connected to the output end of the linear motion actuator. The linear motion actuator is an electric push rod 15 or a telescopic cylinder or a telescopic hydraulic cylinder. In this embodiment, the linear motion actuator is an electric push rod 15, and the electric push rod 15 is fixedly installed on the bottom surface of the cable trench cover 1. Specifically, the electric push rod 15 is fixedly installed on the mounting plate 16, and the top of the mounting plate 16 is fixedly installed on the bottom surface of the cable trench cover 1.

[0041] The temperature sensor 9 and the humidity sensor 10 are both located in the cable trench 3. Specifically, the temperature sensor 9, the humidity sensor 10 and the controller 11 are all installed on the left wall of the partition wall 4. The temperature sensor 9 and the humidity sensor 10 are both connected to the controller 11 signal. The controller 11 controls the linear motion actuator in the drive assembly to work according to the temperature sensor 9 and the humidity sensor 10.

[0042] The adjustment plate 13 is horizontally slidably connected to the inner wall of the cable trench 3. Specifically, a frame 17 for the adjustment plate 13 to slide is fixedly connected to the inner wall of the left side wall of the cable trench 3. The frame 17 includes an upper L-shaped plate 171 and a lower L-shaped plate 172. An upper slide groove for the top end of the adjustment plate 13 to be inserted into is formed between the upper L-shaped plate 171 and the inner wall of the left side of the cable trench 3. A lower slide groove for the bottom end of the adjustment plate 13 to be inserted into is formed between the lower L-shaped plate 172 and the inner wall of the left side of the cable trench 3. Figure 4 As shown, a plurality of ventilation holes 131 are provided on the adjustment plate 13, and the ventilation holes 131 correspond one to one with the vents 12. In addition, in this embodiment, the cable 6 is used to supply power to the cable trench temperature control and moisture-proof module.

[0043] When in use, the temperature sensor 9 and the humidity sensor 10 transmit the temperature signal and the humidity signal to the controller 11 in real time. When the temperature inside the cable trench 3 exceeds the temperature threshold, or when the humidity inside the cable trench 3 exceeds the threshold, the controller 11 controls the electric push rod 15 to work according to the received signal. The electric push rod 15 drives the adjustment plate 13 to slide horizontally in the frame 17 through the connecting rod 14 until the ventilation hole 131 on the adjustment plate 13 completely overlaps with the ventilation hole 12 on the left side wall of the cable trench 3. At this time, due to the passage of vehicles in the tunnel 18, there is a difference in air flow rate between the inside of the cable trench 3 and the outside of the cable trench 3. The air pressure in the tunnel 18 is lower than the air pressure inside the cable trench 3. Therefore, the inside of the cable trench 3 and the outside of the cable trench 3 realize air exchange through the ventilation hole 12 and the ventilation hole 131, and the high-temperature and humid air inside the cable trench 3 is exchanged with the dry and cold air in the tunnel 18, so that the temperature and humidity inside the cable trench 3 are reduced, achieving the purpose of cooling and moisture-proofing.

[0044] When the humidity inside the cable trench 3 is below the threshold, but the temperature inside the cable trench 3 is lower than the threshold, the controller 11 controls the electric push rod 15 to work, and the electric push rod 15 drives the adjustment plate 13 to slide horizontally in the frame 17 through the connecting rod 14, until the ventilation hole 131 on the adjustment plate 13 is completely offset from the vent 12 on the left wall of the cable trench 3, and the vent 12 is closed by the adjustment plate 13 to avoid air exchange between the inside of the cable trench 3 and the outside of the cable trench 3. In addition, since the aerogel felt 2 is designed in the cable trench 3, the aerogel felt 2 has a low thermal conductivity and excellent thermal insulation effect, so the heat emitted by the cable 6 when it is powered on can be better retained in the cable trench 3, thereby increasing the temperature in the cable trench 3, realizing the regulation of the temperature inside the cable trench 3, making it difficult for the accumulated water in the cable trench 3 to freeze, and effectively reducing the impact of the freezing of accumulated water on the structure of the cable trench 3. In addition, it should be noted that, in the present embodiment, the controller 11 preferentially controls the operation of the electric push rod 15 according to the humidity signal, that is, when the humidity exceeds the threshold value, regardless of whether the temperature exceeds the threshold value or is lower than the threshold value, the controller 11 controls the operation of the electric push rod 15 so that the air vent 131 completely overlaps with the vent 12 to achieve moisture removal and achieve the purpose of moisture-proofing.

[0045] In addition, when the heat emitted by the cable 6 when it is energized is not enough to prevent the accumulated water in the cable trench 3 from freezing, the accumulated water in the cable trench 3 (including the accumulated water on the surface of the aerogel felt 2 and the accumulated water between the aerogel felt 2 and the inner wall of the cable trench 3) freezes. During the freezing process, the volume of the ice body increases, squeezing the rubber sheet 8, and the rubber sheet 8 becomes thinner, thereby preventing the ice body from directly exerting an extrusion force on the inner wall of the cable trench 3, thereby effectively reducing the damage to the structure of the cable trench 3 caused by the freezing of the accumulated water and reducing safety hazards.

[0046] Embodiment 2

[0047] The difference between this embodiment and the first embodiment is that: Figure 5 As shown, the system in this embodiment further includes a water collecting ditch 20 , which is located between the cable trench 3 and the tunnel side wall 19 .

[0048] In this embodiment, the leakage water flowing down the tunnel side wall 19 will first flow into the ditch 20 and be discharged from the ditch 20, thereby reducing or even preventing the leakage water flowing down the tunnel side wall 19 from flowing into the cable trench 3.

[0049] Embodiment 3

[0050] The difference between this embodiment and the first embodiment is that the driving assembly in this embodiment is different from the driving assembly in the first embodiment. Figure 6As shown, the driving assembly in this embodiment includes a gear 21, a rack 22 and a driving motor 23 for driving the gear 21 to rotate. The driving motor 23 is controlled by the controller 11. The driving motor 23 is fixedly mounted on the bottom surface of the cable trench cover 1. The gear 21 is meshed with the rack 22, and the rack 22 is welded to the adjustment plate 13.

[0051] In this embodiment, the temperature sensor 9 and the humidity sensor 10 respectively monitor the temperature and humidity in the cable trench 3 in real time, and transmit the temperature signal and the humidity signal to the controller 11. The controller 11 controls the driving motor 23 to work according to the received signal, and the driving motor 23 drives the gear 21 to rotate. Since the gear 21 is meshed with the rack 22, the rack 22 drives the adjustment plate 13 to slide back and forth horizontally between the upper L-shaped plate 171 and the lower L-shaped plate 172, so as to adjust the overlap between the air vent 131 and the vent 12, thereby changing the air exchange amount between the inside of the cable trench 3 and the outside of the cable trench 3, thereby realizing dehumidification and temperature regulation.

[0052] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the present invention. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. Tunnel cable trench thermal insulation, temperature control and moisture-proof system, including cable trench thermal insulation module and cable trench temperature control and moisture-proof module, characterized in that: The cable trench heat insulation module comprises a cable trench cover, an aerogel felt and a plurality of elastic members, the plurality of elastic members are located between the aerogel felt and the inner wall of the cable trench, the elastic member is a rubber sheet, the rubber sheet is arranged in contact with the inner wall of the cable trench, a cavity is arranged inside the rubber sheet, and a vent hole for connecting the cavity with the outside is arranged on the rubber sheet, the aerogel felt is distributed on the bottom surface of the cable trench cover and the inner wall of the cable trench, and the part of the aerogel felt distributed on the inner wall of the cable trench is fixedly connected to the inner wall of the cable trench; the cable trench temperature control and moisture-proof module comprises a temperature sensor, a humidity sensor, a controller, a plurality of vents opened on the side wall of the cable trench, an adjustment plate for closing the vents, and a driving assembly for driving the adjustment plate to slide, the temperature sensor and the humidity sensor are both located in the cable trench, the temperature sensor and the humidity sensor are both connected to the controller signal, the controller controls the driving assembly to work according to the temperature sensor and the humidity sensor, the adjustment plate is horizontally slidably connected to the inner wall of the cable trench, a plurality of ventilation holes are opened on the adjustment plate, and the ventilation holes correspond to the vents one by one.

2. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 1 is characterized by: A frame for the adjustment plate to slide is fixedly connected to the inner wall of the cable trench, and the frame includes an upper L-shaped plate and a lower L-shaped plate. An upper sliding groove for the top end of the adjustment plate to be inserted into is formed between the upper L-shaped plate and the inner wall of the cable trench, and a lower sliding groove for the bottom end of the adjustment plate to be inserted into is formed between the lower L-shaped plate and the inner wall of the cable trench.

3. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 1 is characterized by: The driving assembly comprises a linear motion actuator and a connecting rod, one end of the connecting rod is fixedly connected to the adjustment plate, and the other end of the connecting rod is fixedly connected to the output end of the linear motion actuator.

4. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 3 is characterized by: The linear motion actuator is an electric push rod or a telescopic cylinder or a telescopic hydraulic cylinder.

5. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 1 is characterized by: The driving assembly comprises a gear, a rack and a driving motor for driving the gear to rotate, the gear is meshed with the rack, and the rack is arranged on the adjustment plate.

6. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 1 is characterized by: The vent is arranged obliquely, and the high end of the vent is close to the adjustment plate.

7. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 1 is characterized by: The system also includes a water collecting ditch, which is located between the cable trench and the tunnel side wall.

8. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 1 is characterized by: A partition wall is arranged in the cable trench, and the partition wall divides the inner space of the cable trench into a cable cavity and a fire-fighting cavity.

9. The tunnel cable trench heat insulation, temperature control and moisture proof system according to claim 1, characterized in that: A cable bracket for placing cables is arranged in the cable trench.

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