A ventilation system for improving tunnel environment

Abstract

This invention discloses a ventilation system for improving the tunnel environment in the field of tunnel ventilation system technology. It includes a lower positioning plate, an upper positioning plate, and a chiller. An air inlet duct assembly is installed in the lower positioning plate, and an air outlet duct assembly is installed in the upper positioning plate. Multiple circulation units are arranged between the air inlet and outlet duct assemblies. Each circulation unit includes: a diversion duct assembly, which consists of two symmetrically arranged connecting duct assemblies. Each connecting duct assembly includes a side connecting pipe, an outlet pipe, and a return pipe. The side connecting pipe is vertically arranged, with its upper end connected to the outlet duct assembly via the outlet pipe, and its lower end connected to the air inlet duct assembly via the return pipe. Temperature sensors are installed at both ends of the side connecting pipe. A control unit is also included. This invention can guide tunnel air into the diversion duct assembly during ventilation when there is low passenger flow. Due to the sinking characteristic of cold air, the cold air sinks and is reintroduced into the tunnel, reducing the cooling energy consumption inside the tunnel.

Description

Technical Field

[0001] This invention relates to the field of tunnel ventilation system technology, specifically a ventilation system for improving the tunnel environment. Background Technology

[0002] Tunnel ventilation systems are an important component of tunnel engineering. Existing common subway station ventilation systems need to work in conjunction with air conditioning systems to maintain a low-temperature environment within the station. However, keeping the ventilation system running at high speed continuously would result in significant energy waste during periods of low passenger traffic.

[0003] Modern subway station ventilation systems are generally equipped with temperature control sensors that automatically adjust their operating intensity based on passenger flow: low speed during low passenger flow and high speed during high passenger flow. However, this adjustment method mostly achieves its effect by reducing the workload of the fans, resulting in limited energy savings. Especially in the high temperatures of summer, the ventilation system not only needs to start the fans but also requires air conditioning to cool the hot outside air before introducing it into the station. At this time, even during periods of low passenger flow, the air conditioning still needs to run continuously to maintain a low temperature, but the heat dissipation demand of people inside the station is relatively low, resulting in the underutilization of the cool air and a double waste of energy: fan energy consumption and cooling energy consumption. Summary of the Invention

[0004] The technical problem of the present invention is to provide a ventilation system for improving the tunnel environment, which can guide the tunnel cavity into the diversion pipe group during ventilation when the traffic flow is low. Due to the sinking characteristic of cold air, the low temperature air sinks and is reintroduced into the tunnel, thereby reducing the cooling energy consumption inside the tunnel.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ventilation system for improving tunnel environment, comprising a lower positioning plate, an upper positioning plate, and a chiller, wherein the upper and lower positioning plates are respectively installed on the upper and lower sides of the tunnel, an air inlet pipe assembly is provided in the lower positioning plate, and an air outlet pipe assembly is provided in the upper positioning plate, wherein multiple sets of circulation units are provided between the air inlet pipe assembly and the air outlet pipe assembly, and the circulation unit includes:

[0006] The diversion pipe assembly consists of two symmetrically arranged connecting pipe assemblies. Each connecting pipe assembly includes a side connecting pipe, an exhaust pipe, and a return pipe. The side connecting pipe is vertically arranged and its upper end is connected to the exhaust pipe assembly through the exhaust pipe, while its lower end is connected to the air inlet pipe assembly through the return pipe. Temperature sensors are installed at both the upper and lower ends of the side connecting pipe, and an internal control valve is fixedly installed in the middle of the side connecting pipe.

[0007] The control unit includes a remote control system, a lower control valve, an upper control valve, a temperature sensor located on the side connecting pipe, and a carbon dioxide sensor located inside the tunnel. The remote control system can control the opening and closing of the inner control valve, the lower control valve, and the upper control valve based on the electrical signals transmitted by the temperature sensor and the carbon dioxide sensor. The upper control valve is fixedly installed on the discharge pipe, and the lower control valve is fixedly installed on the return pipe.

[0008] When there is low traffic, open the upper control valve and the inner control valve, close the lower control valve, and exhaust air into the side connecting pipe through the exhaust pipe. Then close the upper control valve and open the inner control valve to allow the exhaust air to remain in the side connecting pipe. When the temperature sensor difference between the two ends of the side connecting pipe is large, close the inner control valve and open the lower control valve and the upper control valve, so that the high-temperature air enters the exhaust duct assembly through the exhaust pipe, and the low-temperature air enters the air inlet duct assembly through the return pipe.

[0009] As a further embodiment of the present invention, the air inlet pipe assembly includes two sets of long air inlet pipes, a chiller, and an air inlet suction component. The two sets of long air inlet pipes are symmetrically installed at both ends of the lower positioning plate. The chiller is fixedly installed inside the lower positioning plate and located between the two sets of long air inlet pipes. The chiller can cool the outside air and then input it into the long air inlet pipes. Multiple sets of air inlet suction components are provided and are equidistantly connected to the upper end of the long air inlet pipes. The upper end of the air inlet suction component extends through the lower positioning plate into the tunnel.

[0010] As a further embodiment of the present invention, the exhaust pipe assembly includes an exhaust pipe and an exhaust suction component. Two sets of exhaust pipes are provided and symmetrically installed in the upper positioning plate. An exhaust block is fixedly installed at the lower end of each exhaust pipe, and the lower end of the exhaust block passes through the upper positioning plate and is introduced into the tunnel. Multiple sets of exhaust suction components are provided and equidistantly connected to the upper end of the exhaust pipe.

[0011] As a further embodiment of the present invention, the air intake suction component and the air exhaust suction component include an extension pipe and an air pump. The extension pipe is fixedly installed at the inlet end of the air pump. The end of the extension pipe away from the air pump is connected to the exhaust long pipe and the air intake long pipe. The output end of the air pump is provided with a filter screen.

[0012] As a further embodiment of the present invention, a lower fan is rotatably mounted at the middle position of the lower positioning plate, and an upper fan is rotatably mounted at the middle position of the upper positioning plate. The upper fan and the lower fan are arranged opposite to each other and rotate in opposite directions.

[0013] As a further embodiment of the present invention, the end of the discharge pipe away from the side connecting pipe is fixedly connected to the exhaust pipe, the upper control valve is fixedly installed on the discharge pipe, the end of the return pipe away from the side connecting pipe is fixedly connected to the air inlet pipe, and the lower control valve is fixedly installed on the return pipe.

[0014] As a further embodiment of the present invention, the exhaust block is a long strip-shaped sealing block with multiple sets of ventilation slots on it. The ventilation slots penetrate the exhaust block. A sealing plate is rotatably installed on the lower surface of the exhaust block. The sealing plate can seal the ventilation slots. The remote control system consists of a remote intelligent terminal and an information transmission module. The remote control system realizes the transmission of control commands and status feedback of the remote intelligent terminal to various components of the ventilation system through the information transmission module.

[0015] As a further embodiment of the present invention, the side connecting pipe is located inside the tunnel, the side connecting pipe is evenly divided into upper and lower sections and connected in the middle by a threaded pipe, a sealing gasket is provided at the connection between the threaded pipe and the side connecting pipe, and both the discharge pipe and the return pipe are flexible hoses.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In this invention, during periods of low passenger flow, the exhaust air from the subway tunnel enters the diversion pipe assembly. Through a static setting process, the low-temperature and high-temperature portions of the exhaust air are separated. The high-temperature air then enters the exhaust duct assembly through the exhaust pipe and is subsequently discharged outside the subway tunnel. The low-temperature air enters the air inlet duct assembly through the return pipe, where it mixes with the outside air, thus cooling the outside air and reducing the cooling energy consumption of the ventilation system, further reducing energy waste in the ventilation system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 For the present invention Figure 1 A partial structural diagram at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the structure from a side view of the present invention;

[0022] Figure 4 For the present invention Figure 3 A partial structural diagram at point B;

[0023] Figure 5 This is a drainage flow diagram of the present invention.

[0024] In the attached diagram, the components represented by each number are as follows:

[0025] 1. Lower positioning plate; 2. Upper positioning plate; 3. Exhaust long pipe; 4. Inlet long pipe; 5. Inlet suction unit; 6. Exhaust suction unit; 7. Lower fan; 8. Side connecting pipe; 9. Discharge pipe; 10. Return pipe; 11. Lower control valve; 12. Upper control valve; 13. Temperature sensor; 14. Internal control valve; 15. Air pump; 16. Extension pipe; 17. Upper fan; 18. Exhaust block; 19. Refrigeration unit. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-5 This invention provides a technical solution: a ventilation system for improving tunnel environment, comprising a lower positioning plate 1, an upper positioning plate 2, and a chiller 19. The upper positioning plate 2 and the lower positioning plate 1 are respectively installed on the upper and lower sides of the tunnel. An air inlet pipe assembly is provided inside the lower positioning plate 1, and an air outlet pipe assembly is provided inside the upper positioning plate 2. Multiple sets of circulation units are provided between the air inlet pipe assembly and the air outlet pipe assembly. The circulation unit includes:

[0028] The diversion pipe assembly consists of two symmetrically arranged connecting pipe assemblies. The connecting pipe assembly includes a side connecting pipe 8, an exhaust pipe 9, and a return pipe 10. The side connecting pipe 8 is vertically arranged and its upper end is connected to the exhaust pipe assembly through the exhaust pipe 9. Its lower end is connected to the air inlet pipe assembly through the return pipe 10. Temperature sensors 13 are installed at both the upper and lower ends of the side connecting pipe 8. An internal control valve 14 is fixedly installed in the middle of the side connecting pipe 8.

[0029] A control unit is also provided, which includes a remote control system, a lower control valve 11, an upper control valve 12, a temperature sensor 13 on the side connecting pipe 8, and a carbon dioxide sensor inside the tunnel. The remote control system is a PLC, which can control the opening and closing of the inner control valve 14, the lower control valve 11, and the upper control valve 12 according to the temperature change signal monitored by the temperature sensor 13 and the carbon dioxide concentration change signal monitored by the carbon dioxide sensor. The inner control valve 14, the lower control valve 11, and the upper control valve 12 are all gas valves that can be controlled by the PLC. The upper control valve 12 is fixedly installed on the discharge pipe 9, and the lower control valve 11 is fixedly installed on the return pipe 10.

[0030] When there is low traffic, open the upper control valve 12 and the inner control valve 14, close the lower control valve 11, and discharge air into the side connecting pipe 8 through the discharge pipe 9. Then close the upper control valve 12 and open the inner control valve 14 to allow the discharged air to remain in the side connecting pipe 8. When the temperature difference between the two ends of the side connecting pipe 8 is large, close the inner control valve 14 and open the lower control valve 11 and the upper control valve 12 to allow high-temperature air to enter the exhaust pipe group through the discharge pipe 9, and low-temperature air to enter the air inlet pipe group through the return pipe 10.

[0031] In this invention, the ventilation system mainly consists of an air inlet duct assembly and an air outlet duct assembly. External air enters the subway tunnel through the chiller 19 and the air inlet duct assembly, and is then discharged to the outside of the subway tunnel through the air outlet duct assembly. During periods of high passenger flow, the subway exhaust system outputs directly from the air outlet duct assembly, shortening the ventilation process and improving ventilation efficiency, allowing the subway tunnel to adapt to high passenger flow conditions. However, during periods of low passenger flow, the low-temperature air is not saturated during ventilation inside the subway. After the air inside the subway tunnel enters the air outlet duct assembly, the upper control valve 12 and the inner control valve 14 are opened, and the lower control valve 11 is closed. The discharged air enters the side connecting pipe 8 through the discharge pipe 9, and then the upper control valve 12 is closed and the inner control valve 14 is opened. This allows the exhaust air to settle within the side connecting pipe 8. During this settling process, the low-temperature air sinks to the bottom of the side connecting pipe 8, while the high-temperature air enters the upper part of the side connecting pipe 8. When the temperature difference between the two ends of the side connecting pipe 8 (temperature sensor 13) is large, the inner control valve 14 is closed, and the lower control valve 11 and the upper control valve 12 are opened. This allows the high-temperature air to enter the exhaust duct assembly through the exhaust pipe 9 and be discharged to the outside of the subway tunnel. The low-temperature air enters the air inlet duct assembly through the return pipe 10, where it mixes with the outside air, cooling the outside air and reducing the cooling energy consumption of the ventilation system, further reducing energy waste in the ventilation system. In addition, the volume of the side connecting pipe 8 can be adaptively adjusted according to specific application scenarios to ensure that the cooling energy consumption is reduced to the optimal level.

[0032] As a further embodiment of the present invention, the air inlet pipe assembly includes two sets of long air inlet pipes 4, a chiller 19, and an air inlet suction component 5. The two sets of long air inlet pipes 4 are symmetrically installed at both ends of the lower positioning plate 1. The chiller 19 is fixedly installed inside the lower positioning plate 1 and located between the two sets of long air inlet pipes 4. The chiller 19 can cool the outside air and input it into the long air inlet pipes 4. Multiple sets of air inlet suction components 5 are provided and are equidistantly connected to the upper end of the long air inlet pipes 4. The upper end of the air inlet suction component 5 extends through the lower positioning plate 1 into the tunnel.

[0033] During operation, the air intake pipe 4 in this invention is set parallel to the direction of the subway tunnel, and the air intake suction components 5 are equidistantly distributed on it. This allows the air inside and outside the air intake pipe 4 to be equidistantly distributed inside the subway tunnel under the action of the air intake suction components 5, making the distribution in the subway tunnel more uniform.

[0034] As a further embodiment of the present invention, the exhaust pipe assembly includes an exhaust pipe 3 and an exhaust suction component 6. The exhaust pipe 3 is provided in two sets and symmetrically installed in the upper positioning plate 2. An exhaust block 18 is fixedly installed at the lower end of each exhaust pipe 3, and the lower end of the exhaust block 18 passes through the upper positioning plate 2 and is introduced into the tunnel. The exhaust suction component 6 is provided in multiple sets equidistantly connected to the upper end of the exhaust pipe 3.

[0035] During operation, the exhaust pipe 3 is located at the upper end of the subway tunnel and the air inlet pipe 4 is located at the lower end of the subway tunnel. This allows the high-temperature air accumulated at the upper part of the subway tunnel to enter the exhaust pipe 3 first when the air is exhausted.

[0036] As a further embodiment of the present invention, the air intake suction component 5 and the air exhaust suction component 6 have the same structure, both including an extension pipe 16 and an air pump 15. The extension pipe 16 is fixedly installed at the inlet end of the air pump 15, and the end of the extension pipe 16 away from the air pump 15 is connected to the exhaust long pipe 3 or the air intake long pipe 4. The output end of the air pump 15 is provided with a filter screen.

[0037] During operation, both the air intake suction component 5 and the exhaust suction component 6 of this invention are equipped with filter screens at their output ends. The air intake suction component 5 can perform final filtration on the air introduced into the tunnel, improving the quality of the air introduced into the tunnel, while the exhaust suction component 6 performs preliminary filtration on the exhaust air, reducing the pollution of the exhaust air to the outside air.

[0038] As a further embodiment of the present invention, a lower fan 7 is rotatably mounted at the middle position of the lower positioning plate 1, and an upper fan 17 is rotatably mounted at the middle position of the upper positioning plate 2. The upper fan 17 and the lower fan 7 are arranged opposite to each other and rotate in opposite directions.

[0039] During operation, the rotation and convection of the upper fan 17 and the lower fan 7 in this invention can increase the airflow speed inside the subway tunnel, enhance the activity of the gas in the air, and prevent carbon dioxide accumulation.

[0040] As a further embodiment of the present invention, the end of the discharge pipe 9 away from the connecting pipe 8 is fixedly connected to the exhaust pipe 3, the upper control valve 12 is fixedly installed on the discharge pipe 9, the end of the return pipe 10 away from the connecting pipe 8 is fixedly connected to the air inlet pipe 4, and the lower control valve 11 is fixedly installed on the return pipe 10.

[0041] During operation, the upper control valve 12 and the lower control valve 11 in this invention can control the flow of gas in the discharge pipe 9 and the return pipe 10.

[0042] As a further embodiment of the present invention, the exhaust block 18 is a long strip-shaped sealing block with multiple sets of ventilation slots. The ventilation slots penetrate the exhaust block 18. A sealing plate is rotatably installed on the lower surface of the exhaust block 18. The sealing plate can seal the ventilation slots. The remote control system consists of a remote intelligent terminal and an information transmission module. The remote control system realizes the transmission of control commands and status feedback of the remote intelligent terminal to each component of the ventilation system through the information transmission module.

[0043] During operation, when it is necessary to exhaust high-temperature air from the upper end of the side connecting pipe 8, the sealing plate at the bottom of the exhaust block 18 needs to be closed. At this time, through the action of the exhaust suction component 6, the air at the upper end of the side connecting pipe 8 enters the exhaust long pipe 3 through the upper control valve 12. The remote control system can obtain the carbon dioxide content inside the subway tunnel based on the carbon dioxide sensor. The higher the carbon dioxide content, the greater the passenger flow in the subway, thereby adjusting the working efficiency of the ventilation system. The air diversion status inside the side connecting pipe 8 can be determined by the difference between the temperature sensors 13 at the upper and lower ends of the side connecting pipe 8.

[0044] As a further embodiment of the present invention, the side connecting pipe 8 is located inside the tunnel. The side connecting pipe 8 is evenly divided into upper and lower sections and connected in the middle by a threaded pipe. A sealing gasket is provided at the connection between the threaded pipe and the side connecting pipe 8. The discharge pipe 9 and the return pipe 10 are both flexible hoses.

[0045] During operation, the side connecting pipe 8 of this invention is located inside the subway tunnel and is connected in the middle by a threaded pipe, which facilitates the maintenance of the side connecting pipe 8.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A ventilation system for improving tunnel environment, comprising a lower positioning plate (1), an upper positioning plate (2), and a chiller (19), characterized in that: The upper positioning plate (2) and the lower positioning plate (1) are respectively installed on the upper and lower sides of the tunnel. An air inlet pipe assembly is provided inside the lower positioning plate (1), and an air outlet pipe assembly is provided inside the upper positioning plate (2). Multiple circulation units are provided between the air inlet pipe assembly and the air outlet pipe assembly. The circulation unit includes: The diversion pipe group consists of two symmetrically arranged connecting pipe groups. The connecting pipe group includes a side connecting pipe (8), an exhaust pipe (9), and a return pipe (10). The side connecting pipe (8) is vertically arranged and its upper end is connected to the exhaust pipe group through the exhaust pipe (9). Its lower end is connected to the air inlet pipe group through the return pipe (10). Temperature sensors (13) are installed at both the upper and lower ends of the side connecting pipe (8). An internal control valve (14) is fixedly installed in the middle position of the side connecting pipe (8). The control unit includes a remote control system, a lower control valve (11), an upper control valve (12), a temperature sensor (13) located on the side connecting pipe (8), and a carbon dioxide sensor located inside the tunnel. The remote control system can control the opening and closing of the inner control valve (14), the lower control valve (11), and the upper control valve (12) according to the electrical signals transmitted by the temperature sensor (13) and the carbon dioxide sensor. The upper control valve (12) is fixedly installed on the discharge pipe (9), and the lower control valve (11) is fixedly installed on the return pipe (10). When the flow of people is low, open the upper control valve (12) and the inner control valve (14), close the lower control valve (11), and exhaust air enters the side connecting pipe (8) through the exhaust pipe (9). Then close the upper control valve (12) and open the inner control valve (14) so ​​that the exhaust air stays in the side connecting pipe (8). When the temperature sensor (13) at both ends of the side connecting pipe (8) has a large difference, close the inner control valve (14), open the lower control valve (11) and the upper control valve (12) so that the high temperature air enters the exhaust pipe group through the exhaust pipe (9) and the low temperature air enters the air inlet pipe group through the return pipe (10).

2. The ventilation system for improving tunnel environment according to claim 1, characterized in that: The air inlet pipe assembly includes two sets of long air inlet pipes (4), a chiller (19), and an air intake suction component (5). The two sets of long air inlet pipes (4) are symmetrically installed at both ends of the lower positioning plate (1). The chiller (19) is fixedly installed inside the lower positioning plate (1) and located between the two sets of long air inlet pipes (4). The chiller (19) can cool the outside air and input it into the long air inlet pipes (4). The air intake suction component (5) is provided in multiple sets and is equidistantly connected to the upper end of the long air inlet pipes (4). The upper end of the air intake suction component (5) extends through the lower positioning plate (1) into the tunnel.

3. A ventilation system for improving tunnel environment according to claim 2, characterized in that: The exhaust pipe assembly includes an exhaust pipe (3) and an exhaust suction component (6). The exhaust pipe (3) is provided in two sets and is symmetrically installed in the upper positioning plate (2). An exhaust block (18) is fixedly installed at the lower end of each exhaust pipe (3), and the lower end of the exhaust block (18) passes through the upper positioning plate (2) and is introduced into the tunnel. The exhaust suction component (6) is provided in multiple sets that are equidistantly connected to the upper end of the exhaust pipe (3).

4. A ventilation system for improving tunnel environment according to claim 3, characterized in that: The air intake suction component (5) and the air exhaust suction component (6) include an extension pipe (16) and an air pump (15). The extension pipe (16) is fixedly installed at the inlet end of the air pump (15). The end of the extension pipe (16) away from the air pump (15) is connected to the exhaust pipe (3) and the air intake pipe (4). The output end of the air pump (15) is equipped with a filter screen.

5. A ventilation system for improving tunnel environment according to claim 3, characterized in that: A lower fan (7) is rotatably installed at the middle position of the lower positioning plate (1), and an upper fan (17) is rotatably installed at the middle position of the upper positioning plate (2). The upper fan (17) and the lower fan (7) are arranged opposite to each other and rotate in opposite directions.

6. A ventilation system for improving tunnel environment according to claim 3, characterized in that: The exhaust block (18) is a long strip-shaped sealing block with multiple sets of ventilation slots. The ventilation slots penetrate the exhaust block (18). A sealing plate is rotatably installed on the lower surface of the exhaust block (18). The sealing plate can seal the ventilation slots. The remote control system consists of a remote intelligent terminal and an information transmission module. The remote control system realizes the transmission of control commands and status feedback of the remote intelligent terminal to each component of the ventilation system through the information transmission module.

7. A ventilation system for improving tunnel environment according to claim 1, characterized in that: The side connecting pipe (8) is located inside the tunnel. The side connecting pipe (8) is evenly divided into upper and lower sections and connected in the middle by a threaded pipe. A sealing gasket is provided at the connection between the threaded pipe and the side connecting pipe (8). The discharge pipe (9) and the return pipe (10) are both flexible hoses.

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