Ventilation system for self-flowing drainage tunnel construction of pumped storage power station

Abstract

The utility model discloses a construction ventilation system for a self-flowing drainage tunnel of a pumped storage power station, which structurally mainly comprises an outer tunnel, a fan, a ventilation pipeline and a dust removal piece, and is characterized in that fresh air is conveyed into the tunnel through the fan arranged at a tunnel opening and the ventilation pipeline connected to the fan; and then most of the vitiated air in the tunnel is absorbed and filtered through the dust removal piece, so that the vitiated air in the tunnel and discharged out of the tunnel is reduced, and the pollution of the vitiated air to the environment in the tunnel and outside the tunnel is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation systems, in particular to a ventilation system for the construction of a gravity drainage tunnel in a pumped storage power station. Background Art

[0002] When excavating gravity drainage tunnels, long-distance single-headed excavation construction is usually adopted, that is, single-direction excavation. Depending on the geological environment and construction requirements of the drainage tunnel excavation area, the construction process generally includes blasting, slag removal, support, spraying, drilling, etc., which often causes a large amount of dust to appear on the construction site. Since fuel engines and other equipment are often needed on the construction site, gases such as oil smoke are emitted. As the tunnel is excavated, the longer the tunnel is, the lower the oxygen content in the tunnel is. In addition, the dust, oil smoke and other impurities during construction affect the air quality, making it impossible for construction workers to work safely and efficiently.

[0003] In the existing technology, ventilation equipment such as fans are usually set up to ventilate the tunnel, thereby bringing fresh air from the outside into the tunnel, thereby maintaining the oxygen content in the tunnel. At the same time, the dirty air in the tunnel contaminated by impurities such as dust and oil smoke is blown out or slowly discharged from the tunnel through air pressure, thereby providing a working environment with better air quality for construction workers. However, directly discharging the dirty air and the impurities brought out by the dirty air have a greater impact on the environment. In addition, some dust impurities will fall into the dirty air on the way out of the tunnel, thereby causing dust accumulation in the tunnel, affecting the construction progress. Some oil smoke will also float in the tunnel for a long time due to insufficient power, thereby affecting the construction environment.

[0004] Therefore, there is an urgent need for a ventilation system that can replenish fresh air into the tunnel while reducing the pollution of dust and oil smoke to the outside world and the construction site environment during the construction of a gravity drainage tunnel. Utility Model Content

[0005] The purpose of the utility model is to provide a ventilation system for the construction of a gravity drainage tunnel in a pumped storage power station, which solves the technical problem of replenishing fresh air into the tunnel during the construction of the gravity drainage tunnel while reducing the pollution of impurities such as dust and oil smoke to the outside world and the construction site.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A ventilation system for the construction of a gravity drainage tunnel in a pumped storage power station, comprising a tunnel, characterized in that it further comprises:

[0008] The fan is installed outside the tunnel entrance;

[0009] Ventilation ducts connecting fans and tunnels; and

[0010] The dust removal component is arranged in the tunnel and is connected to the ventilation duct. The dust removal component is used to absorb the dirty air in the tunnel.

[0011] Among them, the ventilator and ventilation duct transport fresh air into the tunnel, and most of the dirty air in the tunnel is absorbed and filtered through the dust removal parts, thereby reducing the amount of dirty air discharged from the tunnel, thereby reducing the pollution of the dirty air to the environment inside and outside the tunnel.

[0012] In some embodiments, the dust removal component includes a negative pressure pump, a dust collecting box and a filter layer. The dust collecting box is connected to the ventilation duct through the negative pressure pump. The filter layer is arranged between the dust collecting box and the negative pressure pump, thereby filtering and collecting dust and other impurities for recycling.

[0013] In order to further improve the ventilation system's absorption effect on polluted air, there are multiple dust removal components, which are arranged in sequence and at intervals along the axial and circumferential directions of the ventilation duct.

[0014] In some relatively complete solutions, the dust collecting box is provided with a ventilation cavity and a dust collecting cavity which are interconnected, the ventilation cavity is connected to the negative pressure pump, and the dust collecting cavity is arranged at the bottom of the ventilation cavity.

[0015] In some embodiments, the dust collecting chamber is provided with a detachable dust collecting member.

[0016] Furthermore, the dust collecting box is provided with a pressure sensor and a prompting member electrically connected to each other, the pressure sensor is arranged between the lower inner wall of the dust collecting cavity and the dust collecting member, and the prompting member is arranged on the outer wall of the dust collecting box.

[0017] In some embodiments, a relay fan and an exhaust fan are also included. The relay fan is arranged at one end of the ventilation duct in the tunnel, and the blowing end of the exhaust fan is arranged toward the tunnel entrance.

[0018] In some embodiments, a plurality of temperature control units are further included, and the plurality of temperature control units are respectively arranged at one end of the fan and the relay fan facing the tunnel.

[0019] Preferably, the distance between the fan and the tunnel crossing is greater than 30m.

[0020] In some embodiments, the tunnel entrance is provided with a spray atomizer.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] In the present invention, fresh air is delivered into the tunnel through a fan arranged at the tunnel entrance and a ventilation duct connected to the fan, and most of the dirty air in the tunnel is absorbed and filtered by the dust removal component, thereby reducing the amount of dirty air in the tunnel and discharged to the outside of the tunnel, thereby reducing the pollution of the dirty air to the environment inside and outside the tunnel, and ensuring the health of the construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A cross-sectional schematic diagram of a ventilation system for the construction of a gravity drainage tunnel in a pumped storage power station according to an embodiment of the present application;

[0025] Figure 2 A cross-sectional schematic diagram of the connection between the ventilation duct and the dust removal component of the ventilation system for the construction of a gravity drainage tunnel of a pumped storage power station according to an embodiment of the present application;

[0026] Figure 3 Schematic diagram of ventilation ducts and dust removal components of a construction ventilation system for a gravity drainage tunnel in a pumped storage power station according to an embodiment of the present application;

[0027] Figure 4 A schematic diagram of a dust removal component of a construction ventilation system for a gravity drainage tunnel of a pumped storage power station according to an embodiment of the present application;

[0028] Figure 5 For the embodiment of this application Figure 1 An enlarged schematic diagram of the symbol A in FIG;

[0029] Reference numerals:

[0030] 100-Tunnel,

[0031] 200-fan,

[0032] 300-ventilation duct,

[0033] 400-dust collection parts, 410-negative pressure pump, 420-dust collection box, 421-ventilation chamber, 422-dust collection chamber, 430-filter layer, 431-sub-filter layer, 440-dust collection parts, 450-purge parts, 460-controller, 461-manual reset switch, 470-dust collection pipe,

[0034] 500-pressure sensor,

[0035] 600-prompt piece, 610-prompt light, 620-prompt horn,

[0036] 700-Relay fan,

[0037] 800-Exhaust Fan,

[0038] 900-temperature control unit, 910-temperature detector, 920-temperature controller,

[0039] 1000-Spray atomizer parts. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms "first", "second", "third", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0044] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0045] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0046] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0047] It should be understood that in the prior art, when constructing a gravity drainage tunnel, due to the use of a long-distance single-headed excavation construction method, the dust, oil smoke and impurities generated during the construction period can only be discharged from the tunnel 100 along the tunnel 100 from the tunnel entrance under the action of the fan 200, thereby causing greater pollution to the environment near the tunnel 100. Secondly, with the further modification of the tunnel 100, the length of the tunnel 100 increases, and the force of the fan 200 becomes smaller and smaller. The dust discharged along with the polluted air will accumulate in the tunnel 100 due to its own gravity and other reasons, thereby affecting the environment in the tunnel 100 and the health of the construction workers. If there is too much dust accumulated in the tunnel 100, it will affect the construction workers' entry and exit of the tunnel 100, thereby affecting the construction progress. On the other hand, due to the distance from the air outlet of the ventilation duct 300, the wind speed blowing the oil smoke out of the tunnel 100 is reduced, and the time for the oil smoke to be discharged from the tunnel 100 is slow. At this time, it will cause damage to the health of the construction workers in the tunnel 100.

[0048] In order to solve the above problems, this embodiment provides a ventilation system for the construction of a gravity drainage tunnel in a pumped storage power station, which further processes and discharges dust, oil smoke and other impurities at the gravity drainage tunnel construction site, thereby bringing fresh air into the tunnel 100 while reducing the pollution of the environment outside and inside the tunnel 100 by dirty air containing impurities such as dust and oil smoke.

[0049] This embodiment provides a ventilation system for construction of a gravity drainage tunnel of a pumped storage power station, including a tunnel 100, a fan 200, a ventilation duct 300, and a dust removal element 400. Figure 1-Figure 2As shown, the fan 200 is arranged outside the tunnel 100, and the air outlet end of the fan 200 is arranged toward the entrance of the tunnel 100. The air outlet end of the fan 200 is connected to the ventilation duct 300. The ventilation duct 300 is arranged along the axial center line of the tunnel 100, and a supporting device is provided at the bottom of the ventilation duct 300 to ensure that the axial center line of the ventilation duct 300 is consistent with the axial center line of the tunnel 100, so that when the fresh air brought in by the fan 200 enters the tunnel 100 through the ventilation duct 300, the distance from one end of the outlet of the ventilation duct 300 to the inner wall of the tunnel 100 can be consistent, so that the content of fresh air in the tunnel 100 is more uniform.

[0050] Among them, the fan 200 can adopt equipment such as stepless speed variable frequency axial flow fans, jet tunnel fans, mixed flow tunnel fans and centrifugal fans. In this embodiment, the fan 200 adopts a stepless speed variable frequency axial flow fan. Specifically, the stepless speed variable frequency axial flow fan has the advantages of intelligence and remote control, so that construction personnel can remotely start and stop the fan 200, thereby improving construction efficiency, and can also immediately remotely stop the operation of the equipment when a safety hazard occurs, thereby reducing the safety impact. At the same time, the stepless speed variable frequency axial flow fan also has the advantages of energy saving and environmental protection, high efficiency and stability, low noise and low vibration, so that the stepless speed variable frequency axial flow fan is in line with my country's green construction concept, reducing energy consumption and reducing pollution.

[0051] The ventilation duct 300 can be made of high-strength polyester synthetic materials, hard metal tubes and other materials. In this embodiment, the ventilation duct 300 is made of high-strength polyester synthetic materials. Among them, the high-strength polyester synthetic materials have high mechanical strength and can withstand large tensile and compressive forces. Secondly, this material also has strong thermal stability and can maintain stable performance at high temperatures. At the same time, the strong corrosion resistance and flame retardancy enable the material to reduce safety hazards at the construction site while ensuring sufficient air volume. Among them, the ventilation duct 300 is laid as the tunnel 100 extends and bends.

[0052] The dust removal member 400 is disposed in the tunnel 100 and is communicated with the ventilation duct 300. Figure 1-Figure 3 As shown, specifically, the dust removal component 400 includes a negative pressure pump 410, a dust collecting box 420 and a filter layer 430, wherein the air outlet of the negative pressure pump 410 is connected to the ventilation duct 300 through a pipe, and the air inlet of the negative pressure pump 410 is connected to the dust collecting box 420 through a pipe, and a filter layer 430 is provided between the negative pressure pump 410 and the dust collecting box 420 for filtering impurities in the dirty air, such as dust, oil smoke, etc., wherein the negative pressure pump 410 can also adopt equipment such as an exhaust pump, a fan, and a vacuum cleaner.

[0053] Among them, when the negative pressure pump 410 is working, the dirty air enters the dust box 420 from the air inlet end of the dust box 420, and then the dirty air passes through the filter layer 430, so that the dust, oil smoke and other impurities in the dirty air are filtered in the dust box 420, and the filtered clean air enters the ventilation duct 300 through the pipe for recycling, thereby compensating for the air volume lost during long-distance transmission.

[0054] In a more complete solution, such as Figure 1-Figure 3 As shown, one end of the pipe between the negative pressure pump 410 and the ventilation duct 300 is arranged in the ventilation duct 300, and the extension direction is consistent with the transmission direction of the wind in this section of the ventilation duct 300, thereby preventing more wind in the ventilation duct 300 from entering the negative pressure pump 410 through the pipe.

[0055] In some embodiments, as Figure 1 As shown, there are multiple dust removal parts 400, and the multiple dust removal parts 400 are arranged on the outer wall of the ventilation duct 300 in the axial and circumferential directions of the ventilation duct 300 at intervals, thereby improving the absorption efficiency and quantity of the dust removal parts 400 for polluted air, thereby further reducing the total amount of polluted air in the tunnel 100, further improving the working environment of the construction workers, and reducing environmental pollution inside and outside the tunnel 100. In this embodiment, the number of dust removal parts 400 can be determined according to the extension length and radial size of the tunnel 100.

[0056] In some embodiments, as Figure 1-Figure 3 As shown, the dust collecting box 420 is provided with a ventilation chamber 421 and a dust collecting chamber 422. The ventilation chamber 421 is connected to the tunnel 100 through a dust collection pipe 470423. The pipe is arranged at one end of the ventilation chamber 421 away from the negative pressure pump 410, wherein the dust collecting chamber 422 and the ventilation chamber 421 are connected to each other, and the dust collecting chamber 422 is arranged at the bottom of the ventilation chamber 421. The ventilation chamber 421 is connected to the negative pressure pump 410. The filter layer 430 is arranged between the ventilation chamber 421 and the negative pressure pump 410. When dirty air enters the dust collecting box 420, it is collected by the dust collecting pipe 470423. The air inlet end of the dust box 420 enters the ventilation cavity 421, wherein the polluted air passes through the ventilation cavity 421 and then passes through the filter layer 430. Thereafter, the filtered clean air enters the ventilation duct 300, and the dust and the like filtered in the ventilation cavity 421 are collected in the dust collecting cavity 422. The collected dust can then be recycled, such as for paving tunnels, repairing damaged roads, etc., thereby cleaning the polluted air and reducing the pollution of dust and other impurities to the environment by recycling dust and the like.

[0057] Among them, such as Figure 4As shown, the ventilation cavity 421 and the dust collecting cavity 422 are perpendicular to each other. Specifically, the axial direction of the ventilation cavity 421 is perpendicular to the axial direction of the dust collecting cavity 422, and the channel between the ventilation cavity 421 and the dust collecting cavity 422 is perpendicular to the axial direction of the ventilation cavity 421.

[0058] A blowing piece 450 is provided on the upper inner wall of the ventilation chamber 421. The blowing direction of the blowing piece 450 is set to the channel between the ventilation chamber 421 and the dust collecting chamber 422. The blowing piece 450 can set a blowing interval, and then blow the dust filtered into the ventilation chamber 421 to the dust collecting chamber 422, so that the dust and other impurities in the ventilation chamber 421 have greater power to enter the dust collecting chamber 422.

[0059] In some embodiments, as Figure 2 As shown, the filter layer 430 includes multiple sub-filter layers 431, wherein the number of sub-filter layers 431 can be increased or decreased according to the geological conditions of the tunnel 100. In this embodiment, the filter layer 430 has two sub-filter layers 431, and the multiple sub-filter layers 431 are arranged in sequence along the wind transmission direction in the ventilation cavity 421. Specifically, the first sub-filter layer 431 adopts a dust bag, wherein the dust bag filters dust while allowing gas to pass through. The second sub-filter layer 431 is a gas filter layer 430 such as toxic gas and oil smoke, which is used to filter toxic and harmful substances, thereby making the gas entering the ventilation duct 300 cleaner.

[0060] In some embodiments, as Figure 2 As shown, a detachable dust collecting member 440 is provided in the dust collecting chamber 422, wherein the dust collecting member 440 can be a metal box, a dust collecting bag or a plastic bag. In this embodiment, the dust collecting member 440 is a dust collecting bag. The surface of the dust collecting bag is smooth and porous. When the gas containing dust passes through the bag, the dust particles will be captured by the surface of the bag and gradually accumulate on the outer surface of the bag as the filtering time increases. This filtering mechanism effectively prevents the passage of dust particles, thereby realizing the collection of dust.

[0061] Secondly, the structural design of the dust bag also enhances its filtering effect. The wrinkles and folds of the bag increase the filtering area and improve the filtering efficiency. At the same time, the bag has good sealing performance, which can effectively prevent dust from leaking out from the gaps in the bag.

[0062] In addition, the cleaning process of the dust bag is relatively simple. The dust inside or on the bag can be cleaned by manually patting it, or the dust particles on the surface of the bag can be shaken off or blown off by high-pressure airflow or mechanical vibration, thereby restoring the filtering performance of the bag and making the dust bag reusable.

[0063] In some embodiments, as Figure 2As shown, a pressure sensor 500 is provided on the lower inner wall of the dust collecting chamber 422, and a prompt piece 600 is provided on the outer wall of the dust collecting box 420. Specifically, the pressure sensor 500 is used to measure the weight of the dust bag. When the weight of the dust bag reaches a specified value, the pressure sensor 500 transmits a signal to the prompt piece 600, and the prompt piece 600 issues a prompt, and then the dust bag can be removed and replaced.

[0064] Among them, such as Figure 1-Figure 3 As shown, the prompt member 600 includes a prompt light 610 and a prompt horn 620. When the prompt member 600 receives a pressure sensor signal, the prompt light 610 flashes and the prompt horn 620 makes a sound, and at the same time, it prompts the construction workers visually and auditorily to ensure that the construction workers can discover and perform corresponding operations in time.

[0065] Among them, the dust removal component 400 also includes a controller 460, which is electrically connected to the negative pressure pump 410, the pressure sensor 500 and the prompt component 600. Among them, the controller 460 has a manual reset switch 461. When the pressure sensor 500 detects that the weight of the dust bag reaches the specified value, the pressure sensor 500 simultaneously sends a signal to the prompt component 600 and the controller 460. At this time, the prompt component 600 issues a prompt, and the controller 460 transmits a signal toward the negative pressure pump 410, thereby stopping the negative pressure pump 410. When the construction personnel reinstall the dust bag into the dust collecting box 420, click the manual reset switch 461, the dust removal component 400 continues to work, and the prompt component 600 stops issuing prompts, thereby avoiding the overflow of dust and other impurities caused by the continuous operation of the dust removal component 400 when the dust bag is removed.

[0066] It should be understood that when the tunnel 100 is excavated for a long distance, if the power of the fan 200 is insufficient to transport fresh air into the tunnel 100, the oxygen content in the tunnel 100 will be reduced, and toxic gases and dust such as oil smoke cannot be discharged in time, which will have a greater impact on the health of the construction workers.

[0067] In order to improve the above situation, in some embodiments, as Figure 1-Figure 2 The ventilation system also includes a relay fan 700 and an exhaust fan 800. The relay fan 700 is arranged at one end of the ventilation duct 300 located in the tunnel 100, and the blowing end of the exhaust fan 800 is arranged toward the entrance of the tunnel 100. There are multiple ventilation ducts 300, and the multiple ventilation ducts 300 are respectively connected to the fan 200, the relay fan 700 and the exhaust fan 800.

[0068] In this embodiment, the relay fan 700 and the ventilation duct 300 connected to the relay fan 700 are arranged along the axis of the tunnel 100, and the relay fan 700 and one end of the outlet of the ventilation duct 300 connected to the fan 200 are spaced apart, so that the fresh air outside the tunnel 100 is transported to the subsequent tunnel 100 under the action of the relay fan 700, thereby ensuring the oxygen content in the tunnel 100 and cleaning up the toxic gas, dust, etc. in the subsequent tunnel 100. Specifically, the spacing distance between the relay fan 700 and one end of the ventilation duct 300 connected to the fan 200 can be set according to data such as the air supply volume.

[0069] Among them, the dust collecting piece 440 is also arranged on the outer wall of the relay fan 700, and the connection method and function are consistent with the dust collecting piece 440 arranged on the fan 200. Specifically, the dust collecting piece 440 is arranged in sequence along the axial and circumferential directions of the relay fan 700, and is used to absorb and filter dirty air.

[0070] In this embodiment, the number of exhaust fans 800 can be multiple, and the multiple exhaust fans 800 are sequentially spaced along the axial direction and circumferential direction of the tunnel 100, such as Figure 1 As shown, for ease of observation, only the exhaust fan 800 near the upper inner wall of the tunnel 100 is drawn in the figure, wherein the exhaust fan 800 provides power for the polluted air that is free in the air and not absorbed by the dust removal unit 400, and discharges the polluted supply air out of the tunnel 100. Since most of the polluted air is absorbed and filtered by the dust removal unit 400, the impact of the polluted air discharged from the tunnel 100 on the environment can be reduced.

[0071] In some embodiments, as Figure 1 As shown, the ventilation system also includes a plurality of temperature control units 900, wherein the temperature control unit 900 includes a temperature detector 910 and a temperature controller 920. Specifically, the plurality of temperature controllers 920 are respectively arranged between the fan 200 and the ventilation duct 300, and between the relay fan 700 and the ventilation duct 300. The plurality of temperature detectors 910 are respectively arranged on the outer wall of the ventilation duct 300 connected to the fan 200 and the outer wall of the ventilation duct 300 connected to the relay fan 700. Specifically, the temperature detector 910 will continuously detect the temperature of the space in which it is located, and then transmit the signal to the outer wall of the ventilation duct 300. To the temperature controller 920, when the temperature in the space is lower than or higher than a pre-set temperature threshold, the fresh air passing through the fan 200 and the relay fan 700 will be heated or cooled by the temperature control unit 900 when entering the temperature control unit 900, so that the air discharged from the ventilation duct 300 heats up or cools the space in the tunnel 100, thereby ensuring that the temperature in the tunnel 100 is in a relatively stable state, making the working environment of the construction workers relatively comfortable, thereby reducing the damage to the construction workers' bodies caused by environmental temperature changes.

[0072] At the same time, the temperature in the tunnel 100 is relatively stable, so that the air pressure in the tunnel 100 is in a relatively stable state, so that the air supply volume required by the tunnel 100 can meet the specified value calculated in advance, avoiding the increase or decrease in the air supply volume required by the tunnel 100 due to the increase or decrease in the ambient temperature, thereby avoiding affecting the progress of the construction of the tunnel 100.

[0073] In some embodiments, as Figure 1 As shown, the fan 200 is disposed at the entrance of the tunnel 100 and is greater than 30 m away from the entrance of the tunnel 100 , thereby ensuring that the polluted air in the tunnel 100 is transported back into the tunnel 100 by the fan 200 .

[0074] In some embodiments, as Figure 1 As shown, the tunnel 100 entrance is provided with a spray atomizer 1000. Specifically, the spray atomizer 1000 is arranged in sequence along the axial direction of the tunnel 100 entrance, and the spraying port of the spray atomizer rack is simultaneously directed toward the center of the circle or the center of the tunnel 100 entrance, so that a water curtain is formed at the tunnel 100 entrance, and then the water-soluble impurities in the dirty gas passing through the water curtain are removed, thereby further purifying the dirty gas and reducing the pollution of the dirty gas to the environment.

Claims

1. A ventilation system for the construction of a gravity drainage tunnel in a pumped storage power station, comprising a tunnel (100), characterized in that: Also includes: A fan (200) is arranged outside the tunnel (100); a ventilation duct (300), connected to the fan (200) and the tunnel (100); A relay fan (700) is provided at one end of the ventilation duct (300) located in the tunnel (100); an exhaust fan (800), wherein the blowing end of the exhaust fan (800) is arranged toward the road crossing of the tunnel (100); a plurality of temperature control units (900), respectively disposed at one end of the fan (200) and the relay fan (700) facing the tunnel (100); and A dust removal component (400) is disposed in the tunnel (100) and is in communication with the ventilation duct (300). The dust removal component (400) is used to absorb polluted air in the tunnel (100).

2. The ventilation system for construction of gravity drainage tunnels in a pumped storage power station according to claim 1, characterized in that: The dust removal element (400) comprises a negative pressure pump (410), a dust collecting box (420) and a filter layer (430); the dust collecting box (420) is connected to the ventilation duct (300) via the negative pressure pump (410); and the filter layer (430) is arranged between the dust collecting box (420) and the negative pressure pump (410).

3. The ventilation system for construction of gravity drainage tunnels in a pumped storage power station according to claim 1, characterized in that: There are multiple dust removal pieces (400), and the multiple dust removal pieces (400) are sequentially spaced apart along the axial direction and the circumferential direction of the ventilation duct (300).

4. The ventilation system for construction of a gravity drainage tunnel for a pumped storage power station according to claim 2, characterized in that: The dust collecting box (420) is provided with a ventilation cavity (421) and a dust collecting cavity (422) which are communicated with each other, the ventilation cavity (421) is communicated with the negative pressure pump (410), and the dust collecting cavity (422) is arranged at the bottom of the ventilation cavity (421).

5. The ventilation system for construction of gravity drainage tunnels in a pumped storage power station according to claim 4, characterized in that: The dust collecting chamber (422) is provided with a detachable dust collecting component (440).

6. The ventilation system for construction of gravity drainage tunnels in a pumped storage power station according to claim 5, characterized in that: The dust collecting box (420) is provided with a pressure sensor (500) and a prompting member (600) electrically connected to each other; the pressure sensor (500) is arranged between the lower inner wall of the dust collecting cavity (422) and the dust collecting member (440); and the prompting member (600) is arranged on the outer wall of the dust collecting box (420).

7. The ventilation system for construction of gravity drainage tunnels in a pumped storage power station according to claim 1, characterized in that: The distance between the fan (200) and the tunnel (100) is greater than 30 m.

8. The ventilation system for construction of gravity drainage tunnels in a pumped storage power station according to claim 1, characterized in that: The tunnel (100) mouth is provided with a spraying atomization component (1000).

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