A single-lane series ventilation system and a ventilation method

Abstract

The application discloses a kind of single-end roadway series connection ventilation systems, including the air inlet component and return air component being arranged in each series connection single-end roadway, and the isolation wind cover being arranged in the communication lane, the isolation wind cover is connected with each return air component;Return air component is close to the isolation wind cover and is provided with monitoring device and wind direction adjusting device, can adjust the wind flow in return air component and blow in communication lane or blow to the isolation wind cover.The application sets up dirty air isolation wind cover, isolates the dirty air generated by each single-end roadway and fresh air, prevents dirty air from entering the working face of next roadway;Avoid the air quality pollution of multiple series connection ventilation, ensure the air quality of subsequent roadway, improve the overall ventilation efficiency;Setting monitoring device monitors the air quality of each roadway, opens the baffle when meeting the ventilation requirement, guides the air flow into the roadway, and stops the relay fan in dirty air isolation wind cover;Reduce unnecessary energy consumption, improve the energy-saving effect of system.

Description

Technical Field

[0001] This invention belongs to the field of local ventilation technology for single-ended mine roadways, specifically a series ventilation system and ventilation method for single-ended roadways. Background Technology

[0002] Maintaining good air quality is crucial during tunneling operations in single-ended mine roadways. Blasting operations generate large amounts of smoke and toxic gases, such as carbon monoxide and nitrogen oxides. If these pollutants are not removed promptly, they can threaten worker health, increasing the risk of poisoning or suffocation, and also reduce visibility, affecting safe operations.

[0003] Traditional tunnel ventilation systems typically employ a combination of local fans and diversion ducts to introduce fresh air into the working face through forced inlet, extraction, or a combination of both, while expelling smoke and toxic gases generated during tunneling.

[0004] However, to ensure tunneling efficiency, multiple single-ended tunnels are often excavated simultaneously, leading to a situation where ventilation is connected in series for these tunnels. The aforementioned ventilation system has the following significant drawbacks in scenarios involving multiple single-ended tunnels with series ventilation:

[0005] 1. In existing systems with multi-stage series ventilation, the extracted polluted air mixes with fresh air, contaminating the air quality in subsequent roadways. This phenomenon reduces the system's ventilation efficiency and jeopardizes the air environment for subsequent tunneling operations.

[0006] 2. Blasting operations generate a large amount of smoke and dust. Traditional systems can effectively remove the smoke and dust in the initial ventilation stage, but as ventilation time increases, the smoke and dust tend to accumulate in eddies inside the tunnel, leading to a significant decrease in ventilation efficiency. This situation is particularly prominent in long-distance tunneling, resulting in extended operation cycle times.

[0007] 3. The equipment layout in the tunnel is relatively complex. To ensure ventilation, multiple local fans and auxiliary equipment need to be installed in the tunnel, which increases the complexity of the layout and maintenance costs. Summary of the Invention

[0008] The main objective of this invention is to provide a series ventilation system and method for single-ended roadways that prevents cross-flow of fresh and polluted air.

[0009] The single-ended roadway series ventilation system provided by the present invention includes an air intake component and a return air component installed in each series single-ended roadway, and an isolation hood installed in the connecting roadway. The isolation hood is connected to each return air component. A monitoring device and a wind direction adjustment device are installed near the isolation hood of the return air component, which can adjust the airflow in the return air component to blow into the connecting roadway or into the isolation hood.

[0010] In one embodiment of the above system, the air intake assembly and the air return assembly are respectively installed on the two side walls along the length of the single-ended tunnel.

[0011] In one embodiment of the above system, the air intake assembly includes an air intake fan and an air intake duct, with the air intake fan located at the end of the air intake duct; the air intake fan is installed at one end of the air intake of the single-ended roadway.

[0012] In one embodiment of the above system, the return air assembly includes a return air fan and a return air duct, with the return air fan located at the end of the return air duct; the return air fan is installed at one end of the working face of the single-ended roadway.

[0013] In one embodiment of the above system, the sewage wind isolation hood is installed at the top of the connecting roadway between each section of the roadway.

[0014] In one embodiment of the above system, the waste air isolation hood is directly connected to the end of the return air duct of the first roadway and Y-shaped connected to the end of the return air duct of each subsequent roadway.

[0015] In one embodiment of the above system, the air outlet of the air inlet duct is positioned higher than the air inlet of the return air fan.

[0016] In one embodiment of the above system, the air volume of the return air fan is greater than the air volume of the intake air fan.

[0017] In one embodiment of the above system, the wind direction adjustment device includes a baffle plate with one end hinged to the polluted air isolation hood, and the baffle plate is connected to a motor; a relay fan is provided in each section of the air duct near the wind direction adjustment device in the polluted air isolation hood.

[0018] A method for ventilation using a series ventilation system for a single-ended roadway as described above, comprising the following specific steps:

[0019] 1. Fresh air in the connecting roadway is supplied to the air intake duct by the air intake fans of each section of the single-ended roadway, and enters the working face of the single-ended roadway through the air intake duct outlet.

[0020] 2. The gas generated at the work site is extracted by the return air fan through the return air duct;

[0021] 3. After the gas from the work surface enters the return air duct, it is monitored by a monitoring device;

[0022] 4. If the detected wind quality is poor, it is considered polluted wind. At this time, when the wind deflector falls, it will close the return air duct. The polluted wind will then be blown into the polluted wind isolation hood and blown out by the subsequent relay fan.

[0023] 5. If the monitored air quality is good and is fresh air, the baffle plate will open upwards to close the sludge isolation hood. The airflow will then blow out from the opening of the return air duct and merge into the fresh air in the connecting tunnel; at the same time, the subsequent relay fan will be shut off for energy saving.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. Install contaminated air isolation hoods to isolate contaminated air from fresh air generated in each single-ended roadway, preventing contaminated air from entering the working face of the next roadway; avoid air quality pollution from multi-section series ventilation, ensure air quality in subsequent roadways, and improve overall ventilation efficiency;

[0026] 2. A monitoring device is installed to monitor the air quality of each roadway section. When the ventilation requirements are met, the damper is opened to direct the airflow into the roadway, and the relay fan in the sewage air isolation hood is shut down; this reduces unnecessary energy consumption and improves the energy-saving effect of the system.

[0027] 3. Position the air outlet of the air inlet duct above the return air fan to prevent toxic and harmful gases and dust from accumulating above the roadway, which helps to achieve more thorough emission and ensures the safety of workers. Attached Figure Description

[0028] Figure 1 This is a top view of an embodiment of the present invention.

[0029] Figure 2 for Figure 1 A frontal structural diagram of one of the tunnels.

[0030] Figure 3 for Figure 1 A front view schematic diagram of the wind direction adjustment device. Detailed Implementation

[0031] The relevant technical solutions will now be clearly and completely described with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, the single-ended tunnel series ventilation system disclosed in this embodiment includes an air intake assembly 1, a return air assembly 2, a waste air isolation hood 3, a monitoring device 4, an air direction adjustment device 5, and a relay fan 6.

[0033] The air intake assembly 1 and the air return assembly 2 are respectively installed on the two side walls along the length of each single-ended roadway.

[0034] The air intake assembly 1 includes an air intake local fan (referred to as a local fan) 11 and an air intake duct 12. The air intake local fan 11 is located at the end of the air intake duct 12. The air intake local fan is installed on one side of the air intake of the single-ended roadway to deliver fresh air into the working face.

[0035] The return air assembly 2 includes a return air fan 21 and a return air duct 22. The return air fan 21 is located at the end of the return air duct 22. The return air fan is installed on one side of the working face of the single-ended roadway to extract the polluted air generated at the working face.

[0036] The sewage wind isolation hood 3 is installed at the top of the connecting roadway between each section of the roadway to avoid obstructing the entry and exit of workers and equipment in the roadway.

[0037] The contaminated air isolation hood 3 is directly connected to the end of the return air duct 22 of the first roadway, and Y-shapedly connected to the ends of the return air ducts 22 of subsequent roadways to ensure smooth ventilation. The contaminated air isolation hood can isolate fresh air from contaminated air, preventing polluted air from entering the next roadway.

[0038] like Figure 2 As shown, the outlet of the air inlet duct 12 is positioned higher than the inlet of the return air fan 21 to ensure that polluted air does not accumulate in eddies in the roadway working face, thus facilitating the discharge of toxic gases and dust. The return air duct 22 is inclined and connected from the lower return air fan 21 to the upper polluted air isolation hood 3.

[0039] The rated air volume of the return air fan is greater than that of the intake air fan, ensuring that the polluted air in each section of the tunnel is completely extracted, and preventing smoke and dust from accumulating in the tunnel.

[0040] like Figure 3 As shown, each return air assembly 2 is equipped with a monitoring device 4 and a wind direction adjustment device 5 at its air outlet. The monitoring device 4 can monitor the air quality of the passing airflow. The wind direction adjustment device 5 includes a baffle plate 51 with one end hinged to the polluted air isolation hood 3. The baffle plate is controlled by a motor.

[0041] Each section of the air duct near the air direction adjustment device 5 in the sewage wind isolation hood 3 is equipped with a relay fan.

[0042] When the baffle plate is opened upwards, it can close the sludge isolation hood, and the airflow is blown out from the opening of the return air duct and flows into the connecting tunnel; when the baffle plate is lowered, it closes the return air duct, and the airflow is blown into the sludge isolation hood and then blown out by the subsequent relay fan.

[0043] The method for using this series ventilation system is as follows:

[0044] 1. Fresh air in the connecting roadway is supplied to the air intake duct by the air intake fans of each section of the single-ended roadway, and enters the working face of the single-ended roadway through the air intake duct outlet.

[0045] 2. The gas generated at the work site is extracted by the return air fan through the return air duct.

[0046] 3. After the gas from the work surface enters the return air duct, it is monitored by a monitoring device.

[0047] 4. If the detected wind quality is poor, it is considered polluted wind. In this case, when the wind deflector falls, it will close the return air duct. The polluted wind will then be blown into the polluted wind isolation hood and blown out by the subsequent relay fan.

[0048] 5. If the monitored air quality is good and is fresh air, the baffle plate will open upwards to close the sludge isolation hood. The airflow will then blow out from the opening of the return air duct and merge into the fresh air in the connecting tunnel; at the same time, the subsequent relay fan will be shut off for energy saving.

[0049] The advantages of using this series ventilation system are:

[0050] 1. Installing contaminated air isolation hoods in connecting roadways effectively isolates contaminated air from fresh air generated in each single-ended roadway, preventing contaminated air from entering the working face of the next roadway; it can avoid air quality pollution from multiple connected ventilation sections, ensure air quality in subsequent roadways, and improve overall ventilation efficiency.

[0051] 2. By replacing the return air ducts of multiple single-ended roadways with waste air isolation hoods, the number of ducts and ventilation resistance are reduced, making the roadway layout simpler; at the same time, the complexity of equipment installation and maintenance is reduced, and operation and maintenance costs are lowered.

[0052] 3. Position the air outlet of the air inlet duct above the return air fan to prevent toxic and harmful gases and dust from accumulating above the roadway, which helps to achieve more thorough emission and ensures the safety of workers.

[0053] 4. By monitoring the air quality of each roadway section through the monitoring device, the damper of the air direction control device is automatically opened when the ventilation requirements are met, so that the airflow is introduced into the roadway and the relay fan in the sewage air isolation hood is shut down; this reduces unnecessary energy consumption and improves the energy-saving effect of the system.

[0054] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A series ventilation system for a single-ended roadway, characterized in that: It includes air intake and return air components installed in each series of single-ended roadways, as well as isolation hoods at the top of the connecting roadways between the single-ended roadways. The isolation hoods are connected to each return air component. A monitoring device and a wind direction adjustment device are installed near the isolation hoods in the return air components. The wind direction adjustment device includes a baffle plate with one end hinged to the isolation hood, which can adjust the airflow in the return air components to blow into the connecting roadway or towards the isolation hoods. A relay fan is installed in each section of the air duct near the wind direction adjustment device in the isolation hoods. The air intake assembly includes an air intake fan and an air intake duct, and the air return assembly includes a air return fan and a air return duct; the air outlet of the air intake duct is higher than the air inlet of the air return fan; the air volume of the air return fan is greater than the air volume of the air intake fan. When the gas from the work face enters the return air duct, it is monitored by a monitoring device. If the air quality is detected as poor, the baffle plate will fall to close the return air duct, and the airflow will then be blown into the isolation hood and blown out by the subsequent relay fan. If the air quality is detected as good, the baffle plate will open upwards to close the isolation hood, and the airflow will then be blown out from the opening of the return air duct and merge into the fresh air in the connecting roadway. At the same time, the subsequent relay fan will be shut off for energy saving. The isolation hood is a polluted air isolation hood.

2. The series ventilation system for a single-ended roadway as described in claim 1, characterized in that: The air intake assembly and the air return assembly are respectively installed on the two side walls along the length of the single-ended tunnel.

3. The series ventilation system for a single-ended roadway as described in claim 1, characterized in that: The air intake fan is located at the end of the air intake duct; the air intake fan is installed at one end of the air intake of the single-ended roadway.

4. The series ventilation system for a single-ended roadway as described in claim 3, characterized in that: The return air fan is located at the end of the return air duct; the return air fan is installed at one end of the working face of the single-ended roadway.

5. The series ventilation system for a single-ended roadway as described in claim 4, characterized in that: The wastewater isolation hood is directly connected to the end of the return air duct of the first single-ended roadway, and is Y-shaped connected to the end of the return air duct of each subsequent single-ended roadway.

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