CN116398210A - Circulating ventilation equipment and method for subway tunnel - Google Patents

Abstract

The invention discloses circulating ventilation equipment and a circulating ventilation method for a subway tunnel, wherein the ventilation equipment comprises an air inlet mechanism and an air exhaust mechanism which are arranged in a tunnel channel; the two groups of air inlet mechanisms are symmetrically arranged, are distributed on two sides of the exhaust mechanism and are positioned below the exhaust mechanism; fresh air is continuously fed in by the air inlet mechanism, and is uniformly and oppositely fed in from two sides of the tunnel channel, and the air in the tunnel channel is continuously sucked and discharged by the air outlet mechanism; in the tunnel ventilation, air flows from the air inlet mechanisms on two sides to the middle part in opposite directions and is sucked upwards by the air exhaust mechanism, so that an opposite circulating type flowing ventilation path of the air in the tunnel passage is formed. According to the invention, through the distributed arrangement of the air inlet mechanism and the air outlet mechanism, a circulating ventilation effect of opposite flow is formed, and the speed of air inlet and air outlet is increased, so that the update speed of the air environment in the tunnel can be increased, and the ventilation effect is further improved.

Description

A kind of circulating ventilation equipment and method for subway tunnel

technical field

The invention relates to a ventilation device and a method, in particular to a subway tunnel circulating ventilation device and a method.

Background technique

During the construction of subway tunnels, it is necessary to supply fresh air to the interior of the project to discharge harmful substances such as harmful gases, steam, dust and gun smoke, so that the temperature, relative humidity and flow velocity of the air inside the project can reach the specified standards. At present, tunnel construction ventilation mainly adopts exhaust type (or extraction type), air supply type (or press-in type), or a hybrid ventilation method combining the two, but it is limited to the setting of exhaust and air supply devices. The ventilation effect of circular flow cannot be formed in the channel, which makes the air flow update speed in the tunnel slower and the ventilation effect is not satisfactory.

Contents of the invention

In order to solve the deficiencies in the above-mentioned technologies, the present invention provides a subway tunnel circulating ventilation device and method.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a subway tunnel circulation ventilation equipment, which includes an air intake mechanism and an exhaust mechanism arranged in the tunnel passage; the air intake mechanism is symmetrically provided with two groups, two groups The intake mechanism is distributed on both sides of the exhaust mechanism and located under the exhaust mechanism;

The fresh air is continuously sent in by the air intake mechanism, and the fresh air is evenly introduced from both sides of the tunnel passage, and the exhaust mechanism continuously sucks and discharges the air in the tunnel passage; in the tunnel passage, the air enters from both sides The air mechanism counterflows to the middle and then is sucked upward by the exhaust mechanism, forming a countercirculating flow ventilation path of air in the tunnel channel.

Further, the air intake mechanism includes a press-in axial flow fan and a jet flow fan. The press-in axial flow fan is provided with one set and is located at the intake end of the air intake mechanism. The jet flow fan is provided with multiple sets, and multiple sets of jet flow fans are arranged in sequence and the air delivered at the conveying inlet;

The press-in axial flow fan and the jet fan, and adjacent jet fans are connected through flexible fiber air inlet pipes, and the air in the air intake mechanism is discharged from the flexible fiber air inlet pipes.

Further, each group of flexible fiber air inlet pipes is connected with a drooping extension pipe, and the extension pipe is used to increase the lateral air inlet area;

Ventilation holes are respectively opened on one side wall of the flexible fiber air inlet pipe and the pipe wall of the extension pipe.

Furthermore, both ends of the flexible fiber air inlet pipe are provided with clamps that can be assembled with a press-in axial flow fan or a jet fan, and the inside of the flexible fiber air inlet pipe is provided with a dust-proof filter screen that surrounds the inner wall of the pipe. The dust filter is locked by a clamp.

Furthermore, the inlet end of the press-in axial flow fan is provided with a detachable filter mechanism, and the filter mechanism is provided with a filter layer for dust filtering and a drying layer for dehumidification.

Further, the filter mechanism also includes an outer frame, and the bottom of the outer frame is provided with an installation opening;

The filter layer and the drying layer are installed on the frame plate, and the frame plate extends into the outer frame from the installation opening, and the frame plate can be detachably installed through side ears and locking screws.

Furthermore, both the press-in axial flow fan and the jet flow fan are equipped with air volume regulating valves.

Further, the exhaust mechanism includes a plurality of induced draft fans that are sequentially connected through flexible fiber exhaust pipes. The flexible fiber exhaust pipes between adjacent induced draft fans are connected to the tee pipe, and the tee pipes of the induced draft fans located at the head and end of the exhaust mechanism are also connected to the gas treatment device, and the exhausted gas is processed by the gas treatment device back row.

The ventilation method of circulating ventilation equipment in a subway tunnel is as follows:

1) Determine the length of the air intake mechanism and exhaust mechanism according to the length of the tunnel passage, and determine the installation quantity and air intake volume of the jet fan according to the length of the intake mechanism, and determine the installation quantity of the induced draft fan according to the length of the exhaust mechanism;

2) An exhaust mechanism is installed along the length direction at the center of the top of the tunnel passage, and an air intake mechanism is installed along the length direction at the positions of the side walls on both sides of the tunnel passage. The intake mechanism is distributed on both sides of the exhaust mechanism and located below the exhaust mechanism;

3) Start the press-in axial flow fan, jet flow fan, and induced draft fan. During the tunnel construction process, the three continue to work;

The fresh air is continuously sent in by the air intake mechanism, and the air flows out from the ventilation hole of the flexible fiber air inlet pipe and is discharged from the ventilation pipe of the extension pipe. The mechanism pumps air in the tunnel passage, and the counterflow air intake flows out upwards under the suction action of the intake mechanism, and so on, and the countercirculation flow ventilation is realized in the tunnel passage.

The invention discloses a circulating ventilation device and method for a subway tunnel. Through the distributed arrangement of an air intake mechanism and an exhaust mechanism, a circulating ventilation effect of opposite flow is formed, and the speed of air intake and exhaust is accelerated, thereby improving The update speed of the air environment in the tunnel, thereby improving the ventilation effect. Moreover, the coordinated design of the flexible fiber air inlet pipe and the extension pipe increases the radiation range of the air inlet, which is more conducive to improving the renewal speed of the air environment.

Description of drawings

Fig. 1 is a schematic diagram of the distribution of the present invention in a tunnel passage.

Fig. 2 is a partial structural schematic diagram of the intake mechanism in Fig. 1 .

Fig. 3 is a partial structural schematic diagram of the exhaust mechanism in Fig. 1 .

Fig. 4 is a structural schematic diagram of the filtering mechanism in Fig. 2 .

In the figure: a, air intake mechanism; b, exhaust mechanism; 1, filter mechanism; 2, press-in axial flow fan; 3, flexible fiber air inlet pipe; Extension pipe; 7, ventilation hole; 8, clamp; 101, outer frame; 102, installation opening; 103, filter layer; 104, drying layer; 105, shelf plate; 106, side ear; 21, induced draft fan; 22, Tee pipe; 23, flexible fiber exhaust pipe.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

A subway tunnel circulation ventilation equipment, as shown in Figure 1, it includes an air intake mechanism a and an exhaust mechanism b arranged in the tunnel passage; wherein, the air intake mechanism a is symmetrically arranged in two groups, and the air intake mechanisms on both sides Arranged along the walls on both sides of the tunnel passage, the exhaust mechanism b is arranged along the top centerline of the tunnel passage, so that the two groups of intake mechanisms are distributed on both sides of the exhaust mechanism b and located below the exhaust mechanism b. Triangular distribution.

As a result, the fresh air is continuously fed in by the intake mechanism a, and the fresh air is evenly introduced from both sides of the tunnel passage, and the exhaust mechanism b continuously sucks and discharges the air in the tunnel passage; in the tunnel passage, through Exhaust mechanism a and air intake mechanism b are arranged in a specific way. The air flows from the intake mechanism a on both sides to the middle and then is sucked upward by the exhaust mechanism b, forming a counter-circulation type of air in the tunnel passage. Flow ventilation path.

As shown in Figure 2, the air intake mechanism a includes a press-in axial fan 2 and a jet fan 5. The press-in axial fan 2 is provided with a group and is located at the intake end of the air intake a To the air intake mechanism, it realizes the air supply for the tunnel channel; the jet fan 5 is provided with multiple groups, and the multiple groups of jet fans are arranged in sequence and used to transmit the air sent in by the intake end.

Between the press-in axial flow fan 2 and the jet fan, and between adjacent jet fans are connected through the flexible fiber air inlet pipe 3, and the flexible fiber pipe is used as the air pipe, so that the layout of the air intake mechanism a is more convenient. easy.

Each group of flexible fiber air inlet pipes 3 is connected with a hanging extension pipe 6, and the extension pipe 6 is used to increase the lateral air inlet area. One side of the flexible fiber air inlet pipe 3 and the pipe wall of the extension pipe 6 are respectively provided with ventilation holes 7, and the air in the air intake mechanism a passes through the ventilation holes on the flexible fiber air inlet pipe 3 and the extension pipe 6. 7 discharge.

For the flexible fiber air inlet pipe 3, which is used for air supply, the air hole is smaller than the air pipe aperture. The inner wall of the pipe 3 is surrounded by a dust-proof filter, and the two ends of the flexible fiber air inlet pipe 3 are provided with a clamp 8 that can be assembled with the press-in axial flow fan 2 or jet flow fan 5, and the clamp 8 is connected to the fan through thread matching. Simultaneously, the dust-proof filter screen is pressed against the clamp 8, and the locking installation of the dust-proof filter screen is realized by the cooperation of the clamp 8 and the locking screw.

Simultaneously, there is filtering mechanism 1 to carry out filtering and drying treatment for intake air in advance, also as described in Figure 1, the inlet end of press-in type axial flow fan 2 is provided with detachable filtering mechanism 1, as shown in Figure 4, The filter mechanism 1 is provided with a filter layer 103 for filtering dust and a drying layer 104 for dehumidification.

In order to facilitate the replacement of the filter layer 103 and the drying layer 104, the filter mechanism 1 is configured as a detachable structure, and as shown in Figure 4, the filter mechanism 1 also includes an outer frame 101, and the bottom of the outer frame 101 is provided with an installation opening 102; The filter layer 103 and the drying layer 104 are installed on the frame plate 105, and the frame plate 105 extends into the outer frame 101 from the installation opening 102, and the frame plate 105 is detachably installed through the side ears 106 and locking screws.

In addition, both the press-in axial flow fan 2 and the jet flow fan 5 are equipped with an air volume regulating valve 4 to facilitate the adjustment of the air intake air volume.

As shown in FIG. 3 , the exhaust mechanism b includes a plurality of induced draft fans 21 sequentially connected through flexible fiber exhaust pipes 23 , and the intake ends of the induced draft fans 21 are located at the bottom of the fan main body. Also adopt the flexible fiber air pipe to connect the adjacent induced draft fan, the flexible pipeline is convenient for the layout of the exhaust mechanism; the induced draft fan 21 sucks the air in the tunnel channel, and the sucked air enters from the air inlet section at the bottom, The air outlet end of the induced draft fan 21 is set as a three-way pipe 21, and the flexible fiber exhaust pipe 23 between adjacent induced draft fans is connected on the three-way pipe 21. The three-way pipe of the blower is also externally connected to a gas treatment device, and the discharged gas is discharged outside after being processed by the gas treatment device.

At the same time, the air intake mechanism and exhaust mechanism are arranged, so that the intake and exhaust processes are passive processes. The distributed arrangement of the intake mechanism and exhaust mechanism forms a circular ventilation effect of counterflow, and the air intake and exhaust The speed is accelerated, which can increase the renewal speed of the air environment in the tunnel, thereby improving the ventilation effect.

Thus, for the subway tunnel circulating ventilation equipment disclosed in the present invention, its ventilation method is:

1) Determine the length of the air inlet mechanism a and the exhaust mechanism b according to the length of the tunnel passage, and determine the installation quantity and air intake volume of the jet fan 5 according to the length of the air inlet mechanism a, and determine the installation of the induced draft fan 21 according to the length of the exhaust mechanism b quantity;

2) Install the exhaust mechanism b along the length direction at the top center of the tunnel passage, install the air intake mechanism a along the length direction at the side walls on both sides of the tunnel passage, and the drooping extension pipe 6 hangs down along the wall of the tunnel passage Installed so that the intake mechanism a is distributed on both sides of the exhaust mechanism b and located below the exhaust mechanism b;

3) Start the press-in axial flow fan 2, jet flow fan 5, and induced draft fan 21. During the tunnel construction process, the three continue to work;

The fresh air is continuously sent in by the air intake mechanism a, and the air flows out from the ventilation hole of the flexible fiber air inlet pipe 3 and is discharged from the ventilation pipe of the extension pipe 6, and the air intake mechanism a on both sides forms the air intake of opposite flow; it is located in the middle The upper air intake mechanism a draws air in the tunnel passage, and the counterflow air intake flows upward under the air intake action of the air intake mechanism a, and so on, so as to realize countercirculation flow ventilation in the tunnel passage.

The above-mentioned embodiments are not limitations to the present invention, and the present invention is not limited to the above-mentioned examples, and changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present invention also belong to this invention. protection scope of the invention.

Claims (9)

1. A subway tunnel circulation type ventilator is characterized in that: it comprises the air intake mechanism (a), the exhaust mechanism (b) that are arranged in the tunnel channel; Described air intake mechanism (a) is symmetrically provided with two groups , two groups of intake mechanisms are distributed on both sides of the exhaust mechanism (b) and located below the exhaust mechanism (b); The air intake mechanism (a) continuously feeds in fresh air, and the fresh air enters evenly from both sides of the tunnel passage, and the exhaust mechanism (b) continuously sucks and discharges the air in the tunnel passage; In the tunnel, the air flows in opposite directions from the intake mechanism (a) on both sides to the middle and then is sucked upward by the exhaust mechanism (b), forming a countercirculating flow ventilation path of air in the tunnel passage. 2. The subway tunnel circulating ventilation device according to claim 1, characterized in that: the air intake mechanism (a) includes a press-in axial flow fan (2), a jet fan (5), and a press-in axial flow fan (5). The blower fan (2) is provided with one group and is located at the air intake end of the air intake mechanism (a), and the jet flow fan (5) is provided with multiple groups, and the multiple sets of jet flow fans are arranged in sequence and are used to transmit the air sent in by the air intake end; The press-in type axial flow fan (2) is communicated with the jet fan, and adjacent jet fans are connected through a flexible fiber air inlet pipe (3), and the air in the air intake mechanism (a) is formed from the flexible fiber The air inlet pipe (3) is discharged. 3. The subway tunnel circulating ventilation device according to claim 2, characterized in that: each group of flexible fiber air inlet pipes (3) is connected with a drooping extension pipe (6), and the extension pipe (6) is used for To increase the lateral air intake area; Ventilation holes (7) are opened on one side wall of the flexible fiber air inlet pipe (3) and the pipe wall of the extension pipe (6). 4. The subway tunnel circulating ventilation device according to claim 3, characterized in that: the two ends of the flexible fiber air inlet pipe (3) are provided with press-in type axial fans (2) or jet fans ( 5) Assembled clamp (8), the pipe body of the flexible fiber air inlet pipe (3) is provided with a dust-proof filter screen surrounding the inner wall of the pipe, and the dust-proof filter screen is locked by the clamp (8). 5. The subway tunnel circulating ventilation device according to claim 4, characterized in that: the inlet end of the press-in axial flow fan (2) is provided with a detachable filter mechanism (1), and the filter mechanism (1 ) is equipped with a filter layer (103) for filtering dust and a drying layer (104) for dehumidification. 6. The subway tunnel circulating ventilation device according to claim 5, characterized in that: the filter mechanism (1) also includes an outer frame (101), and the bottom of the outer frame (101) is provided with an installation opening (102) ; The filter layer (103) and drying layer (104) are installed on the frame plate (105), the frame plate (105) extends into the outer frame (101) from the installation opening (102), and the frame plate (105) passes through the side ear (106) with locking screw for removable mounting. 7. The subway tunnel circulating ventilation device according to claim 6, characterized in that: the press-in axial flow fan (2) and the jet flow fan (5) are equipped with air volume regulating valves (4). 8. The subway tunnel circulating ventilation device according to claim 7, characterized in that: said exhaust mechanism (b) includes a plurality of induced draft fans (21) connected sequentially through flexible fiber exhaust pipes (23) ), the air inlet end of the induced draft fan (21) is positioned at the bottom of the fan main body, and the outlet end of the induced draft fan (21) is set as a tee pipe (21), and the flexible joint between adjacent induced draft fans The fiber exhaust pipe (23) is connected to the tee pipe (21), and the tee pipe of the induced draft fan located at the head and end of the exhaust mechanism (b) is also connected to a gas treatment device, and the exhausted gas is processed by the gas treatment device back row. 9. A ventilation method of the subway tunnel circulating ventilation equipment as claimed in claim 8, characterized in that: the ventilation method is: 1) Determine the length of the air intake mechanism (a) and exhaust mechanism (b) according to the length of the tunnel passage, and determine the number of jet fans (5) installed and the air intake volume according to the length of the air intake mechanism (a), and the exhaust mechanism ( B) length determines the installation quantity of induced draft fan (21); 2) Install the exhaust mechanism (b) along the length direction at the top center of the tunnel passage, install the air intake mechanism (a) along the length direction at the side walls on both sides of the tunnel passage, and the drooping extension pipe (6) along the The wall of the tunnel passage is installed in a pendent manner, so that the air intake mechanism (a) is distributed on both sides of the exhaust mechanism (b) and is located below the exhaust mechanism (b); 3) Start the press-in axial flow fan (2), jet flow fan (5), and induced draft fan (21). During the tunnel construction process, the three continue to work; Fresh air is continuously fed in by the air intake mechanism (a), and the air flows out from the ventilation hole of the flexible fiber air inlet pipe (3) and is discharged from the ventilation pipe of the extension pipe (6). The air intake mechanisms (a) on both sides form a pair Air intake to the flow; the air intake mechanism (a) located above the middle part draws air in the tunnel passage, and the air intake air to the opposite flow flows out upwards under the action of the air intake mechanism (a), repeating this, in the tunnel passage The internal realization of rapid counter-circulation flow ventilation.

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