Series ventilation system for blind roadway

Abstract

The utility model discloses a blind roadway series connection ventilation system which comprises air inlet assemblies and air return assemblies which are arranged in all blind roadways connected in series and an isolation fan cover arranged in a connection roadway, and the isolation fan cover is connected with all the air return assemblies. A monitoring device and an air direction adjusting device are arranged at the position, close to the isolation fan cover, of the air return assembly, and air flow in the air return assembly can be adjusted to be blown to the connection roadway or the isolation fan cover. According to the utility model, the dirty air isolation fan cover is arranged to isolate dirty air and fresh air generated by each section of the blind roadway, so that the dirty air is prevented from entering the working surface of the next roadway; the air quality pollution caused by multi-section series ventilation is avoided, the air quality of a subsequent roadway is ensured, and the overall ventilation efficiency is improved; a monitoring device is arranged to monitor the air quality of each section of roadway, a baffle is opened when the ventilation requirement is met, air flow is guided into the roadway, and a relay fan in a dirty air isolation fan cover is shut down; unnecessary energy consumption is reduced, and the energy-saving effect of the system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of local ventilation of dead-end tunnels in mines, in particular to a series ventilation system for dead-end tunnels. Background Art

[0002] Maintaining good air quality is crucial during tunneling operations in blind mine tunnels. Blasting during tunneling produces large amounts of smoke and toxic gases, such as carbon monoxide and nitrogen oxides. If these pollutants are not promptly discharged, they pose a threat to worker health, increasing the risk of poisoning or asphyxiation. They also reduce visibility and compromise safe operations.

[0003] Traditional tunnel ventilation systems usually use a combination of local fans and drainage ducts to introduce fresh air into the working face through pressure-in, extraction-out or pressure-extraction mixed ventilation methods, and discharge the smoke and toxic and harmful gases generated during the excavation process.

[0004] However, in order to ensure excavation efficiency, multiple blind tunnels are often excavated simultaneously, resulting in the situation where multiple blind tunnels are ventilated in series. The above ventilation system has the following obvious defects in the scenario where multiple blind tunnels are ventilated in series:

[0005] 1. When the existing system uses multiple ventilation stages in series, the extracted polluted air mixes with the fresh air, polluting the air quality in subsequent tunnels. This phenomenon reduces the system's ventilation efficiency and jeopardizes the air environment for subsequent tunneling operations.

[0006] 2. Blasting operations generate large amounts of smoke and dust. Traditional systems can effectively remove smoke and dust in the initial ventilation stages, but as ventilation time increases, smoke and dust tend to form eddies and accumulate within the tunnel, significantly reducing ventilation efficiency. This situation is particularly prominent during long-distance excavation, resulting in extended operation cycle times.

[0007] 3. The equipment layout in the tunnel is relatively complicated. In order to ensure the ventilation effect, multiple local fans and auxiliary equipment need to be installed in the tunnel, which increases the layout complexity and maintenance cost. Utility Model Content

[0008] The main purpose of the utility model is to provide a dead-end tunnel series ventilation system which can prevent the cross-flow of fresh air and polluted air.

[0009] The dead-end tunnel series ventilation system provided by the utility model includes an air inlet assembly and a return air assembly respectively arranged on the two side walls in the length direction of each series-connected dead-end tunnel, and an isolation wind hood arranged at the top of the connecting tunnel, and the isolation wind hood is connected to each return air assembly; the return air assembly is provided with a monitoring device and a wind direction adjustment device near the isolation wind hood, which can adjust the airflow in the return air assembly to blow into the connecting tunnel or to the isolation wind hood.

[0010] In one embodiment of the above system, the air intake assembly includes an air intake fan and an air intake duct, and the air intake fan is arranged at the end of the air intake duct; the air intake fan is installed at one end of the air inlet of the dead-end tunnel.

[0011] In one embodiment of the above system, the return air assembly includes a return air local fan and a return air duct, and the return air local fan is arranged at the end of the return air duct; the return air local fan is installed at one end of the working surface of the dead-end tunnel.

[0012] In one embodiment of the above system, the dirty air isolation hood is directly connected to the end of the return air duct of the first section of the tunnel, and is Y-connected to the end of the return air duct of each subsequent tunnel.

[0013] In one embodiment of the above system, the air outlet position of the air inlet duct is higher than the air inlet position of the return air fan.

[0014] In one embodiment of the above system, the air outlet volume of the return air local fan is greater than the air intake volume of the intake air local fan.

[0015] In one embodiment of the above system, the wind direction adjustment device includes a wind shield hinged to the dirty wind isolation hood at one end, and the wind shield is connected to the motor; a relay fan is provided in each air duct section near the wind direction adjustment device in the dirty wind isolation hood.

[0016] The beneficial effects of the utility model are:

[0017] 1. Install polluted air isolation hoods to isolate polluted air from fresh air in each dead-end tunnel, preventing polluted air from entering the working surface of the next tunnel. This also avoids air quality contamination from multiple series ventilation, ensuring the air quality of subsequent tunnels and improving overall ventilation efficiency.

[0018] 2. A monitoring device is installed to monitor the air quality in each tunnel section. When the ventilation requirements are met, the dampers are opened to direct the airflow into the tunnel, and the relay fans in the polluted air isolation hood are shut down; this reduces unnecessary energy consumption and improves the energy-saving effect of the system.

[0019] 3. Set 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 tunnel, which helps to achieve more thorough discharge and ensure the safety of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the top structure of an embodiment of the utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the front view structure of a tunnel.

[0022] Figure 3 for Figure 1 Schematic diagram of the front view of the wind direction adjustment device. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technical solutions. Obviously, the embodiments described are only some embodiments, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, the dead-end tunnel series ventilation system disclosed in this embodiment includes an air inlet component 1, a return air component 2, a dirty air isolation hood 3, a monitoring device 4, a wind direction adjustment device 5 and a relay fan 6.

[0025] The air inlet assembly 1 and the air return assembly 2 are respectively arranged on the two side walls of each dead-end tunnel in the length direction.

[0026] The air intake assembly 1 includes an air intake local fan (abbreviated as local fan) 11 and an air intake duct 12. The air intake local fan 11 is arranged at the end of the air intake duct 12; the air intake local fan is installed on one side of the air inlet of the dead-end tunnel to deliver fresh air into the working surface.

[0027] The return air assembly 2 includes a return air fan 21 and a return air duct 22. The return air fan 21 is arranged at the end of the return air duct 22; the return air fan is installed on the working surface side of the dead-end tunnel to extract the polluted air generated by the working surface.

[0028] The dirty air isolation hood 3 is set at the top of the connecting tunnel between each section of the tunnel to avoid blocking the entry and exit of workers and equipment in the tunnel.

[0029] The polluted air isolation hood 3 is directly connected to the end of the return air duct 22 of the first section of the laneway and is connected to the end of the return air duct 22 of each subsequent laneway in a Y-shaped manner to ensure smooth ventilation. The setting of the polluted air isolation hood can isolate fresh air from polluted air, preventing polluted air from entering the next section of the laneway.

[0030] like Figure 2 As shown, the air outlet of the air inlet duct 12 is higher than the air inlet of the return air fan 21 to ensure that the polluted air does not accumulate in the tunnel working surface, which helps to discharge toxic gases and dust. The return air duct 22 is inclined and connected from the low return air fan 21 to the top polluted air isolation hood 3.

[0031] The rated air volume of the return air fan is greater than that of the inlet air fan, ensuring that the polluted air in each section of the tunnel is completely extracted to avoid the accumulation of smoke and dust in the tunnel.

[0032] like Figure 3As shown, the air outlet of each return air assembly 2 is provided with a monitoring device 4 and a wind direction adjustment device 5. The monitoring device 4 can monitor the air quality passing through the airflow; the wind direction adjustment device 5 includes a wind shield 51 hinged at one end to the dirty air isolation hood 3, and the wind shield is controlled by a motor.

[0033] A relay fan is provided in each section of the air duct near the wind direction regulating device 5 in the dirty air isolation hood 3.

[0034] When the wind shield is opened upward, the dirty air isolation hood can be closed, and the air flow is blown out from the opening of the return air duct and merged into the connecting tunnel; when the wind shield is dropped, the return air duct is closed, and the air flow is blown into the dirty air isolation hood and blown out by the subsequent relay fan.

[0035] When using this series ventilation system for ventilation, the method is as follows:

[0036] 1. The fresh air in the connecting tunnel is sent into the air inlet duct by the air inlet fans of each section of the dead-end tunnel, and enters the working surface of the dead-end tunnel through the air inlet duct outlet.

[0037] 2. The gas generated on the working surface is extracted by the return air fan through the return air duct.

[0038] 3. After the gas from the working surface enters the return air duct, it is detected by a monitoring device.

[0039] 4. If the monitored wind quality is poor, it is polluted air. At this time, the wind shield will fall and the return air duct will be closed. The polluted air flow will be blown into the polluted air isolation hood and blown out by the subsequent relay fan.

[0040] 5. If the monitored wind quality is good and is fresh air, the wind shield will be opened upwards to close the dirty air isolation hood. The air will be blown 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 fans will be turned off to save power.

[0041] The advantages of using this series ventilation system for ventilation are:

[0042] 1. Install polluted air isolation hoods in connecting lanes to effectively isolate polluted air from fresh air in each dead-end lane, preventing polluted air from entering the working surface of the next lane. This can avoid air quality pollution caused by multiple series ventilation, ensure the air quality of subsequent lanes, and improve overall ventilation efficiency.

[0043] 2. Using polluted air isolation hoods to replace the return air ducts of multiple dead-end lanes reduces the number of ducts and ventilation resistance, making the lane layout simpler; at the same time, it reduces the complexity of equipment installation and maintenance, and reduces operation and maintenance costs;

[0044] 3. Place 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 tunnel, which helps to achieve more thorough discharge and ensure the safety of workers;

[0045] 4. The air quality in each section of the tunnel is monitored by a monitoring device. When the ventilation requirements are met, the damper of the wind direction control device is automatically opened to direct the airflow into the tunnel, and the relay fan in the dirty air isolation hood is shut down; thus, unnecessary energy consumption is reduced and the energy-saving effect of the system is improved.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although detailed with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalent features for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A blind tunnel series ventilation system, characterized by: It includes air inlet components and return air components respectively arranged on the two side walls in the length direction of each series-connected dead-end tunnel, and an isolation wind hood arranged at the top of the connecting tunnel, and the isolation wind hood is connected to each return air component; the return air component is provided with a monitoring device and a wind direction adjustment device near the isolation wind hood, which can adjust the airflow in the return air component to blow into the connecting tunnel or towards the isolation wind hood.

2. The dead-end tunnel series ventilation system according to claim 1, characterized in that: The air inlet assembly comprises an air inlet fan and an air inlet duct. The air inlet fan is arranged at the end of the air inlet duct; the air inlet fan is installed at one end of the air inlet of the dead-end tunnel.

3. The dead-end tunnel series ventilation system according to claim 2, characterized in that: The return air assembly includes a return air local fan and a return air duct. The return air local fan is arranged at the end of the return air duct; the return air local fan is installed at one end of the working surface of the dead-end tunnel.

4. The dead-end tunnel series ventilation system according to claim 3, characterized in that: The dirty air isolation hood is directly connected to the end of the return air duct of the first section of the lane, and is Y-shaped connected to the end of the return air duct of each subsequent lane.

5. The dead-end tunnel series ventilation system according to claim 3, characterized in that: The air outlet position of the air inlet duct is higher than the air inlet position of the return air fan.

6. The dead-end tunnel series ventilation system according to claim 1, characterized in that: The air outlet volume of the return air fan is greater than the air intake volume of the air intake fan.

7. The dead-end tunnel series ventilation system according to claim 1, characterized in that: The wind direction regulating device comprises a wind shield plate hinged to the dirty wind isolation hood at one end, and the wind shield plate is connected to the motor; a relay fan is provided in each section of the air duct in the dirty wind isolation hood close to the wind direction regulating device.

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