Ventilation cooling trolley and system for high-ground-temperature tunnel

Abstract

The invention discloses a ventilation cooling trolley and system for a high-ground-temperature tunnel. The ventilation cooling trolley comprises a movable trolley support, and an arched light heat insulation layer is arranged on the outer ring of the movable trolley support; a heat recovery fan, a plugging module, a cold air conveying fan and an external hot air blower are further arranged on the movable trolley bracket; the plugging modules are arranged at the end of the movable trolley support, the number of the plugging modules is multiple, and all the plugging modules are arranged adjacently. Each plugging module is driven by a ball screw sliding table to move, so that the tunnel is sealed; a first nozzle and a second nozzle are arranged on the plugging module, the first nozzle is used for spraying grease to a gap between the plugging module, and the second nozzle is used for spraying grease to a binding surface of the plugging module and the surrounding rock.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature tunnel construction, and particularly to a ventilation and cooling trolley and system for high geothermal tunnels. Background Art

[0002] With the continuous advancement of transportation construction, especially in areas with complex geological conditions and high geothermal temperatures, the number of high geothermal tunnels under construction has shown a significant increasing trend. However, such tunnels face many severe challenges during construction, among which the high-temperature environment has a particularly prominent impact on the health of construction workers. High geothermal temperatures not only greatly increase the construction difficulty but also pose a serious threat to the safety and health of workers, resulting in a significant decline in work efficiency and a sharp increase in construction costs.

[0003] The heading face is not only the main source of heat release but also the area where construction workers work intensively. Therefore, the temperature management of the heading face has become a major problem in the construction of high geothermal tunnels. It is difficult to control the temperature of the heading face by ventilation on-site. Therefore, existing technical solutions use a combined action of a ventilation system and a heat insulation layer, adopting a ventilation-exhaust separation mode, aiming to create a low-temperature working environment for the heading face. However, due to differences in surrounding rock grades and changes in dynamic excavation volume, the tunnel cross-section shows non-regular dynamic deformation characteristics, resulting in the inability to form a continuous and effective seal between the heat insulation layer and the surrounding rock. This gap further causes the mixing of cold and hot airflows, weakens the thermal resistance performance of the heat insulation layer, causes cold energy loss and local temperature control failure, and ultimately significantly reduces the cooling efficiency of the system. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, especially aiming at the problems of seal failure and high-temperature environment control caused by differences in surrounding rock grades and dynamic cross-section changes during the construction of high geothermal tunnels, the present invention aims to provide a ventilation and cooling trolley and system for high geothermal tunnels. Through the dynamic seal technology driven by a ball screw slide, it solves the seal failure problem caused by the uneven tunnel cross-section due to differences in surrounding rock grades and excavation volume changes, and realizes efficient isolation of cold and hot air and precise temperature control. Through the modular independent installation and slide adjustment mechanism, the construction safety, adjustment efficiency, and seal reliability are significantly improved. And through innovative structural design and dynamic seal technology, efficient collection, directional transfer, and recycling of heat inside the tunnel are realized, significantly reducing the temperature in the heading face area, improving the construction environment, and enhancing the safety and work efficiency of workers.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a high geothermal tunnel ventilation and cooling trolley, which includes a movable trolley support, and an arched lightweight heat insulation layer is arranged on the outer circle of the movable trolley support; a heat recovery fan, a sealing module, a cold air delivery fan, and a hot air delivery fan are also arranged on the movable trolley support; the sealing module is arranged at the end of the movable trolley support, and there are several sealing modules, and each sealing module is arranged adjacent to each other; each sealing module is driven by a ball screw slide to move to seal the tunnel; a first nozzle and a second nozzle are arranged on the sealing module, the first nozzle is used to spray grease into the gap between the sealing modules, and the second nozzle is used to spray grease onto the joint surface between the sealing module and the surrounding rock.

[0007] As a further technical solution, the sealing module is an elastic rubber part.

[0008] As a further technical solution, the sealing module includes a first inclined part arranged vertically and obliquely and a second inclined part arranged horizontally and obliquely; an obtuse angle is formed between the first inclined part and the second inclined part, and a first nozzle is arranged on the side surface of the first inclined part and the second inclined part; a second nozzle is arranged on the top surface of the second inclined part; the first inclined part is connected to the ball screw slide.

[0009] As a further technical solution, the lightweight heat insulation layer includes a steel plate skeleton, a double-layer arc-shaped thin steel plate, a honeycomb heat insulation rubber skeleton, and lightweight heat insulation ceramsite; the double-layer arc-shaped thin steel plate includes an upper arc-shaped thin steel plate and a lower arc-shaped thin steel plate, a honeycomb heat insulation rubber skeleton is arranged between the upper arc-shaped thin steel plate and the lower arc-shaped thin steel plate, and lightweight heat insulation ceramsite is filled in the honeycomb heat insulation rubber skeleton; a steel plate skeleton is arranged on the outer layer of the upper arc-shaped thin steel plate and the lower arc-shaped thin steel plate.

[0010] As a further technical solution, the ball screw slide is connected to the steel plate skeleton.

[0011] As a further technical solution, the heat recovery fan is arranged at one end of the high geothermal tunnel ventilation and cooling trolley close to the heading face; the cold air delivery fan is arranged at one end of the high geothermal tunnel ventilation and cooling trolley far from the heading face.

[0012] As a further technical solution, multiple heat recovery fans are arranged, and the multiple heat recovery fans are arranged along the circumferential direction of the lightweight heat insulation layer.

[0013] As a further technical solution, a rubber gasket is also arranged in the gap formed by the slide and the heat insulation layer.

[0014] As a further technical solution, the moving path of the ball screw slide is consistent with the slope of the curtain surface.

[0015] In a second aspect, the present invention further provides a system, including the high geothermal tunnel ventilation and cooling trolley described above.

[0016] As a further technical solution, the heat recovery fan is connected to the heat exchange station through a hot air extraction pipeline system, and the heat exchange station is connected to the cold air delivery fan through a cold air delivery pipeline system; thus forming a ventilation and cooling system.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. In the present invention, a sealing module is provided on the movable trolley support, and each sealing module is driven to move by a ball screw slide table, so that the sealing module can adapt to uneven surrounding rocks; at the same time, a first nozzle and a second nozzle are provided on the sealing module, the first nozzle is used to spray grease into the gap between the sealing modules, and the second nozzle is used to spray grease onto the joint surface between the sealing module and the surrounding rock; then, in cooperation with the lightweight heat insulation layer, a sealed heat flow area is formed, so that the heat in the tunnel can only flow through the sealed area, improving the cooling efficiency of the entire system;

[0019] The sealing module of the present invention is controlled by a ball screw slide table, with improved adaptation efficiency and shortened adjustment time; the dynamic sealing technology is realized by driving the sealing module with a ball screw slide table, solving the problem of sealing failure caused by different tunnel excavation amounts and uneven tunnel cross-sections due to different surrounding rock grades, realizing efficient isolation of hot and cold air and precise cooling; through the independent installation of the sealing module and the slide table adjustment mechanism, the construction safety, adjustment efficiency and sealing reliability are significantly improved, and through the innovative structural design and dynamic sealing technology, the efficient collection, directional transfer and recycling of the heat inside the tunnel are realized, significantly reducing the temperature in the heading face area, improving the construction environment, and enhancing the safety and work efficiency of the operators.

[0020] 2. By designing the shape of the sealing module and making the moving path of the ball screw slide table consistent with the slope of the curtain surface, the sealing module moves obliquely along the slope of the curtain surface, combined with the continuous dynamic sealing of the internal grease injection pipeline, the air leakage rate is reduced, effectively blocking the mixing of hot and cold air;

[0021] 3. Synergistic effect of rubber gaskets: A rubber gasket is also provided in the gap formed by the slide table and the heat insulation layer, and the rubber gasket seals the gap between the slide table and the heat insulation layer, further reducing the risk of air leakage caused by mechanical movement.

[0022] 4. Closed-loop hot and cold isolation and efficient cooling

[0023] The heat recovery fan accurately extracts and discharges the heat source at the heading face, combined with the external heat exchange station to form a closed-loop ventilation system, blocking the heat conduction path, and the cooling effect is remarkable.

[0024] 5. The movable support frame and the arc-shaped lightweight heat insulation layer are designed in coordination, compatible with the requirements of different construction stages, and the flexibility of the system is improved. Brief Description of the Drawings

[0025] Figure 1 It is the overall layout drawing of the outside of the trolley;

[0026] Figure 2 It is the layout drawing of the plugging module;

[0027] Figure 3 It is the detailed connection drawing between the plugging modules;

[0028] Figure 4 It is the schematic diagram of the plugging module;

[0029] Figure 5 It is the detailed drawing of the lightweight heat insulation layer;

[0030] Figure 6 It is the detailed drawing of the heat recovery fan;

[0031] Figure 7 It is the layout drawing of the curtain surface of the trolley door;

[0032] Figure 8 It is the layout drawing of the side of the trolley facing the heading face;

[0033] Figure 9 It is the overall operation drawing;

[0034] In the figure: 1 - heading face; 2 - heat recovery fan; 3 - plugging module; 3-1 - first inclined part; 3-2 - second inclined part; 4 - primary support; 5 - cold air; 6 - secondary lining; 7 - heat exchange station; 8 - cold air supply pipeline system; 9 - hot air extraction pipeline system; 10 - hot gas; 11 - tunnel trolley; 12 - cold air delivery fan; 13 - lightweight heat insulation layer; 14 - movable trolley support; 15 - hot air external delivery fan; 16 - surrounding rock; 17 - curtain; 18 - movable end; 19 - fan; 20 - lightweight insulating ceramsite; 21 - honeycomb-shaped heat insulation rubber skeleton; 22 - steel plate skeleton; 23 - thin steel plate; 24 - connecting grease pump pipeline; 25 - ball screw slide table; 26 - grease pump; 27 - first nozzle; 28 - second nozzle; 29 - sealing rubber pad; 30 - telescopic pipeline. Detailed Implementation Modes

[0035] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0037] In view of the problems of seal failure and high-temperature environment control caused by the difference in surrounding rock grades and dynamic cross-section changes during the construction of high-geothermal tunnels, this embodiment provides a ventilation and cooling trolley and system for high-geothermal tunnels. Through the dynamic sealing technology driven by a ball screw slide, it solves the problem of seal failure caused by the uneven tunnel cross-section due to the difference in surrounding rock grades and the change in excavation volume, and realizes the efficient isolation of cold and hot air and precise cooling. Through the independent installation of modules and the slide adjustment mechanism, the construction safety, adjustment efficiency, and seal reliability are significantly improved. Through the innovative structural design and dynamic sealing technology, the efficient collection, directional transfer, and recycling of heat inside the tunnel are realized, the temperature in the heading face area is significantly reduced, the construction environment is improved, and the safety and work efficiency of the operators are enhanced.

[0038] Specifically, the ventilation and cooling trolley for high-geothermal tunnels proposed in this embodiment, as Figure 1 shown, includes a movable trolley support 14, and an arched lightweight heat insulation layer 13 is arranged on the outer circle of the movable trolley support 14; a heat recovery fan 2, a plugging module 3, a cold air delivery fan 12, and a hot air external delivery fan 15 are also arranged on the movable trolley support 14; the plugging module 3 is arranged at the end of the movable trolley support 14, and several plugging modules 3 are arranged adjacent to each other; each plugging module 3 is driven by a ball screw slide 25 to move to seal the tunnel;

[0039] Furthermore, the plugging module 3 and the ball screw slide 25 in this embodiment are designed as Figure 2 , Figure 3 shown. The plugging module 3 is directly fixed to the movable end of the ball screw slide 25, and the ball screw slide 25 can drive the plugging module 3 to move; the slide base is connected to the steel plate skeleton 22 of the lightweight heat insulation layer 13 through high-strength bolts;

[0040] This embodiment also realizes the oblique movement compensation of the ball screw slide 25: the inclination angle of the movement path of the ball screw slide 25 is the same as the slope of the curtain surface. When the plugging module 3 moves along the oblique path, a rubber sealing pad 29 is provided, and the rubber sealing pad 29 closely adheres to the inclined surface of the heat insulation layer to seal the movement gap of the slide.

[0041] Furthermore, to achieve better sealing, a grease injection sealing system is also included. Specifically, a first nozzle 27 and a second nozzle 28 are provided on the plugging module 3, and an injection channel communicating with the first nozzle 27 and an injection channel communicating with the second nozzle 28 are formed inside the plugging module 3; the first nozzle 27 is used to inject grease into the gap between the plugging modules 3, and the second nozzle 28 is used to inject grease onto the contact surface between the plugging module 3 and the surrounding rock 16. The injection channels are all connected to the bottom grease pump 26 through retractable hoses 32. After startup, high-temperature lubricating grease covers the gap between the modules and the contact surface, forming a continuous dynamic sealing layer, and the air leakage rate is reduced (see Figure 3 ).

[0042] Furthermore, in this embodiment, by arranging the plugging module 3 on the movable trolley bracket, each plugging module 3 is driven to move by a ball screw slide 25, so that the plugging module 3 can adapt to the uneven surrounding rock 16; at the same time, a first nozzle 27 and a second nozzle 28 are provided on the plugging module 3. The first nozzle 27 is used to inject grease into the gap between the plugging modules 3, and the second nozzle 28 is used to inject grease onto the contact surface between the plugging module 3 and the surrounding rock 16; then, in cooperation with the lightweight heat insulation layer, a sealed heat flow area is formed, so that the heat in the tunnel can only flow through the sealed area, improving the cooling efficiency of the entire system;

[0043] Furthermore, the plugging module 3 in this embodiment is an elastic rubber part, including a first inclined part 3-1 inclined vertically and a second inclined part 3-2 inclined horizontally; an obtuse angle is formed between the first inclined part 3-1 and the second inclined part 3-2. A first nozzle 27 is provided on the side surfaces of the first inclined part 3-1 and the second inclined part 3-2 to inject grease into the gap between the plugging modules 3; a second nozzle 28 is provided on the top surface of the second inclined part 3-2; the second nozzle 28 is used to inject grease onto the contact surface between the plugging module 3 and the surrounding rock 16; the first inclined part 3-1 is connected to the ball screw slide 25. In this embodiment, by designing the shape of the sealing module 3 and making the moving path of the ball screw slide 25 consistent with the slope of the curtain surface, the plugging module 3 moves obliquely along the slope of the curtain surface. Combined with the continuous dynamic sealing of the internal grease injection pipeline, the air leakage rate is reduced, effectively blocking the mixing of cold and hot air.

[0044] Furthermore, the sealing operation process of the above plugging module 3 adapting to the concave-convex surface is as follows: First, when fitting the concave surface, drive the slide to move the plugging module 3 obliquely upward to fit the concave surface. After locking, start the grease injection to fill the gap; Second, when pressing the convex surface, drive the slide to press the convex surface obliquely downward, and synchronously inject grease to ensure the continuity of sealing.

[0045] Furthermore, the lightweight heat insulation layer in this embodiment is as Figure 5As shown in the figure, it includes a steel plate skeleton 22, a double-layer arc-shaped thin steel plate 23, a honeycomb heat-insulating rubber skeleton 21, and lightweight heat-insulating ceramsite 20; the double-layer arc-shaped thin steel plate 23 includes an upper-layer arc-shaped thin steel plate and a lower-layer arc-shaped thin steel plate. The honeycomb heat-insulating rubber skeleton 21 is arranged between the upper-layer arc-shaped thin steel plate and the lower-layer arc-shaped thin steel plate, and the lightweight heat-insulating ceramsite 20 is filled in the honeycomb heat-insulating rubber skeleton 21; the steel plate skeleton 22 is arranged on the outer layer of the upper-layer arc-shaped thin steel plate and the lower-layer arc-shaped thin steel plate; standardized bolt holes are arranged on the steel plate skeleton 22, and the ball screw slide 25 is fixed on the steel plate skeleton 22. After the slide is fixed, the load-bearing stability of the whole device is improved; at the same time, the honeycomb heat-insulating ceramsite 20 is filled between the double-layer arc-shaped thin steel plates 23, the thermal conductivity is increased, an efficient heat-insulating barrier is formed, and a curtain 17 is arranged to further achieve the sealing effect.

[0046] Furthermore, based on the above high-geotemperature tunnel ventilation and cooling trolley, this embodiment also provides an air extraction and heat exchange system, as Figure 9 shown, which includes a heat recovery fan 2, a cold air delivery fan 12, a heat exchange station 7, a hot air extraction transportation pipeline system 9, a cold air delivery transportation pipeline system 8, etc.;

[0047] Among them, the heat recovery fan 2 that realizes the directional extraction and discharge of heat recovery can adjust the air extraction direction by 360°, accurately capture the heat dissipated from the heading face. The heat recovery fan 2 is arranged at one end of the high-geotemperature tunnel ventilation and cooling trolley close to the heading face, and multiple heat recovery fans 2 are arranged along the circumferential direction of the lightweight heat-insulating layer 13, as Figure 8 shown; the cold air delivery fan 12 is arranged at one end of the high-geotemperature tunnel ventilation and cooling trolley far from the heading face; in this embodiment, two cold air delivery fans 12 are arranged, and the two cold air delivery fans 12 are respectively located at the bottom of the tunnel ventilation and cooling trolley; the heat recovery fan 2 is connected to the heat exchange station 7 through the hot air extraction transportation pipeline system 9, and the heat exchange station 7 is connected to the cold air delivery fan 12 through the cold air delivery transportation pipeline system 8; a ventilation and cooling system is formed.

[0048] Furthermore, a telescopic support rod is arranged on the movable support frame 14 in this embodiment, and the lightweight heat-insulating layer 13 is arranged on the telescopic support rod. By adjusting the telescopic support rod, the height of the lightweight heat-insulating layer 13 can be adjusted to better fit the surrounding rock 16.

[0049] The specific construction method is as follows:

[0050] I. Trolley Deployment and Installation of Dynamic Sealing System

[0051] 1.1 Trolley Structure Assembly and Positioning

[0052] Installation of the arc-shaped lightweight heat-insulating layer: Connect the prefabricated arc-shaped lightweight heat-insulating layer 13 to the steel plate skeleton 22 of the trolley frame through high-strength bolts to ensure structural rigidity;

[0053] Adjustment of the movable support frame: According to the actually measured dimensions of the tunnel section, adjust the telescopic length of the internal movable support frame 14 to adapt to the section changes in different construction stages.

[0054] 1.2 Installation of the plugging module 3 and the ball screw slide table 25:

[0055] Fixing the slide table: Fix the base of the ball screw slide table 25 to the steel plate skeleton of the lightweight heat insulation layer with high-strength bolts. The inclination angle of the slide table track should be consistent with the slope of the curtain surface;

[0056] Assembly of the plugging module 3: Connect the plugging module 3 to the movable end of the slide table through a flange interface.

[0057] 1.3 Commissioning of the grease injection sealing system is as follows:

[0058] Connecting the grease pipeline: Connect the grease injection channel set inside the plugging module 3 to the bottom grease pump 26 through a high-temperature resistant and telescopic hose 32. After starting the pump body, test the grease flow rate to ensure that the grease covers the gaps and mating surfaces between the modules;

[0059] Dynamic sealing test: Manually or electrically drive the ball screw slide table 25 to move the plugging module 3 along the inclined path. If there is local leakage, adjust the displacement accuracy of the slide table or increase the grease injection amount.

[0060] II. Starting and operation of the ventilation and cooling system

[0061] 2.1 Heat recovery and hot air supply

[0062] Directional adjustment of the fan: Start the heat recovery fan 2 and adjust its movable end 18 to the concentrated heat source area of the heading face through a remote control to control the air extraction angle;

[0063] Hot air supply: The hot air is transported by the heat recovery fan to the gap between the surrounding rock 16 and the heat insulation layer and is then transported to the external heat exchange station 7 by the hot air supply fan 15 through a heat preservation pipeline.

[0064] 2.2 Closed-loop circulation of cold air

[0065] Cold air transportation: The cold air (temperature ≤ 25°C) cooled by the heat exchange station is sent back to the inside of the trolley by the cold air transportation fan 12.

[0066] III. System maintenance and dynamic adjustment

[0067] 3.1 Quick replacement process of the plugging module 3

[0068] Disassembly of the damaged module: Disconnect the grease hose 30 and close the valve;

[0069] Loosen the bolts of the slide base, and use the hydraulic lifting device to remove the module and the slide assembly. Installation of the new module:

[0070] Install the new module according to the reverse steps, and calibrate the displacement accuracy of the slide.

[0071] Test the coverage effect of the grease injection to ensure that the sealing layer is continuous without breakpoints.

[0072] 3.2 Periodic maintenance

[0073] Maintenance of the grease system: Check the oil level of the grease pump 26 every shift, replenish the high-temperature resistant lubricating grease, and clean the blockage in the nozzle.

[0074] As shown above, in this embodiment, by setting the blocking module 3 on the movable trolley bracket, each blocking module 3 is driven by a ball screw slide 25 to move, so that the blocking module 3 can adapt to the uneven surrounding rock 16; at the same time, a first nozzle and a second nozzle are provided on the blocking module 3, the first nozzle is used to inject grease into the gap between the blocking modules 3, and the second nozzle is used to inject grease into the joint surface between the blocking module 3 and the surrounding rock 16; then, in cooperation with the lightweight heat insulation layer, a sealed heat flow area is formed, so that the heat in the tunnel can only flow through the area formed by the seal, improving the cooling efficiency of the entire system; the blocking module 3 in this embodiment is controlled by the ball screw slide 25, the adaptation efficiency is improved, and the adjustment time is shortened; the dynamic sealing technology is realized by driving the blocking module 3 by the ball screw slide 25, solving the problem of seal failure caused by different tunnel excavation amounts and uneven tunnel cross-sections due to different grades of surrounding rock 16, realizing efficient isolation of cold and hot air and precise cooling; through the independent installation of the blocking module 3 and the slide adjustment mechanism, the construction safety, adjustment efficiency and seal reliability are significantly improved, and through the innovative structural design and dynamic sealing technology, the efficient collection, directional transfer and recycling of the heat inside the tunnel are realized, significantly reducing the temperature in the heading face area, improving the construction environment, and enhancing the safety and work efficiency of the operators.

[0075] In this embodiment, by designing the shape of the sealing module and making the moving path of the ball screw slide 25 consistent with the slope of the curtain surface, the blocking module 3 moves obliquely along the slope of the curtain surface. Combined with the continuous dynamic sealing of the internal grease injection pipeline, the air leakage rate is reduced, effectively blocking the mixing of cold and hot air; a rubber gasket is also provided in the gap formed by the slide and the heat insulation layer, and the rubber gasket seals the gap between the slide and the heat insulation layer, further reducing the air leakage risk caused by mechanical movement.

[0076] The heat recovery fan accurately exhausts the heat source at the heading face, and forms a closed-loop ventilation system in combination with the external heat exchange station, blocking the heat conduction path, and the cooling effect is remarkable. The movable support frame and the arc-shaped lightweight heat insulation layer are designed in coordination, compatible with the needs of different construction stages, and the flexibility of the system is improved.

Claims

1. A high ground temperature tunnel ventilation and cooling trolley, characterized in that: It includes a movable trolley bracket, and an arched lightweight insulation layer is arranged on the outer ring of the movable trolley bracket; and a heat recovery fan, a sealing module, a cold air conveying fan, and a hot air external supply fan are also arranged on the movable trolley bracket; the sealing module is arranged at the end of the movable trolley bracket, and the sealing modules include several, and each sealing module is arranged closely; each sealing module is driven to move by a ball screw slide to achieve sealing of the tunnel; a first nozzle and a second nozzle are arranged on the sealing module, the first nozzle is used to spray grease into the gap between the sealing modules, and the second nozzle is used to spray grease onto the fitting surface between the sealing module and the surrounding rock.

2. The high ground temperature tunnel ventilation and cooling trolley according to claim 1, characterized in that: The blocking module includes a first inclined portion arranged vertically and a second inclined portion arranged horizontally; the first inclined portion and the second inclined portion form an obtuse angle, and a first nozzle is arranged on the side of the first inclined portion and the second inclined portion; the second nozzle is arranged on the top surface of the second inclined portion; the first inclined portion is connected to the ball screw slide.

3. The high ground temperature tunnel ventilation and cooling trolley according to claim 1, characterized in that: The lightweight thermal insulation layer comprises a steel plate frame, a double-layer curved thin steel plate, a honeycomb thermal insulation rubber frame and lightweight thermal insulation ceramsite; the double-layer curved thin steel plate comprises an upper curved thin steel plate and a lower curved thin steel plate, a honeycomb thermal insulation rubber frame is arranged between the upper curved thin steel plate and the lower curved thin steel plate, and lightweight thermal insulation ceramsite is filled in the honeycomb thermal insulation rubber frame; a steel plate frame is arranged on the outer layer of the upper curved thin steel plate and the lower curved thin steel plate.

4. The high ground temperature tunnel ventilation and cooling trolley according to claim 3, characterized in that: The steel plate frame is connected to the ball screw slide.

5. The high ground temperature tunnel ventilation and cooling trolley according to claim 1, characterized in that: The heat recovery fan is arranged at one end of the high geothermal tunnel ventilation and cooling trolley close to the tunnel face; the cold air delivery fan is arranged at one end of the high geothermal tunnel ventilation and cooling trolley away from the tunnel face.

6. The high ground temperature tunnel ventilation and cooling trolley according to claim 1, characterized in that: The heat recovery fans are provided in plurality and are arranged along the circumference of the lightweight insulation layer.

7. The high ground temperature tunnel ventilation and cooling trolley according to claim 1, characterized in that: A rubber sealing pad is also arranged in the gap formed by the slide table and the heat insulation layer.

8. The high ground temperature tunnel ventilation and cooling trolley according to claim 1, characterized in that: The moving path of the ball screw slide is consistent with the slope of the door curtain surface.

9. A high ground temperature tunnel ventilation and cooling system, characterized in that: It comprises the high geothermal tunnel ventilation and cooling trolley as described in any one of claims 1-8.

10. The high ground temperature tunnel ventilation and cooling system according to claim 9, characterized in that: The heat recovery fan is connected to the heat exchange station through a hot air extraction transport pipeline system, and the heat exchange station is connected to the cold air delivery fan through a cold air delivery pipeline system, forming a ventilation and cooling system.

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