A subway adjustable ventilation type platform door air outlet adjusting method and adjusting system

Abstract

The application discloses a subway adjustable ventilation type platform door air outlet adjusting method and adjusting system, relates to the subway ventilation technical field, solves the problem of uneven distribution of the existing platform length direction piston air volume, improves the adaptability of the platform door air outlet, and specifically has the following solutions: the design wind speed corresponding to the air outlet at different positions of a standard subway station platform and the preset piston air flow are input into a remote control terminal; the initial opening height of the air outlet at different positions is calculated, and the initial adjustment of the air outlet opening degree is carried out; the instantaneous wind speed at the corresponding air outlet is calculated according to the piston air pressure; the instantaneous wind speed is compared with the design wind speed, when the difference exceeds the preset difference range, the height adjustment stroke corresponding to each air outlet is calculated, and the corresponding air valve is controlled to be adjusted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of subway ventilation, in particular to a subway adjustable ventilation type platform door air outlet adjusting method and adjusting system. BACKGROUND

[0002] The ventilation and air conditioning system accounts for 30% to 50% of the total energy consumption of the subway, and is a major energy consumer of the subway project. In addition, the subway environment control cooling system occupies a large area, has poor urban appearance, and has serious environmental problems such as noise. At present, research has proved that in the non-air conditioning season, the ventilation volume caused by the train piston effect can meet the design requirements of the station ventilation, so the station fan can be closed in the non-air conditioning season, thereby effectively reducing the energy consumption of the ventilation system.

[0003] The inventor found that the wind speed distribution of the subway platform door air outlet is extremely uneven, and along the train entering direction, the wind speed of the platform air outlet shows a steep drop trend. Most of the piston wind enters the platform from the air outlet at 0m-55m of the train entering end (0m is the position of the first air outlet passed by the train when entering the station), and the wind speed at the air outlet at 55m-105m of the platform is very small (<1m / s, see the attached figure). Figure 1 This kind of wind speed distribution is extremely unfavorable for the air distribution of the platform and the station. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide a subway adjustable ventilation type platform door air outlet adjusting method and adjusting system. A plurality of height-adjustable air outlets are arranged along the driving direction of the platform door, the initial height of the air outlets at different positions is adjusted to the initial height by using the air outlet initial height calculation method provided by the present application, a pressure sensor is arranged at each air outlet, and the height stroke of the air outlet that needs to be fine-tuned during different train operations is calculated by detecting the piston wind pressure, thereby solving the problem of uneven distribution of the piston wind speed in the length direction of the existing platform.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] In the first aspect, the present application provides a subway adjustable ventilation type platform door air outlet adjusting method, which is specifically as follows:

[0007] The design wind speed corresponding to the air outlet at different positions of the standard subway station platform and the preset piston wind flow are input into the remote control terminal;

[0008] The initial opening height of the air outlet at different positions is calculated and the opening degree of the air outlet is initially adjusted;

[0009] The instantaneous wind speed at the corresponding air outlet is calculated according to the piston wind pressure;

[0010] When the difference exceeds a preset difference range, the height adjustment stroke corresponding to each air port is calculated and the corresponding air valve is controlled to adjust.

[0011] As a further implementation, the design wind speed is obtained according to multiple tests on the wind speed of a standard subway station air port, and the preset piston wind flow is the piston wind flow corresponding to the air port at different positions of the station design.

[0012] As a further implementation, the initial opening height of the air port is obtained according to the preset piston wind flow, the design wind speed, and the length of a single air port.

[0013] As a further implementation, the instantaneous wind speed is obtained by calculating the piston wind pressure and the air density.

[0014] As a further implementation, the height adjustment stroke is obtained by calculating the instantaneous wind speed, the preset piston wind flow, the length of a single air port, and the initial opening height of the air port.

[0015] In a second aspect, the application provides a subway adjustable ventilation type platform door air port adjustment system, which comprises a platform door, a plurality of air ports arranged at intervals along the length direction and arranged above the platform door, an air valve installed in the air port, and a remote control terminal, and a pressure sensor for detecting the piston wind pressure is arranged at each air port; the remote control terminal is connected with the air valve and the pressure sensor, and the remote control terminal is used for receiving the piston wind pressure and calculating the height adjustment stroke corresponding to the air port at different positions.

[0016] As a further implementation, the pressure sensor is arranged on the side of the platform door close to the track.

[0017] As a further implementation, the pressure sensor is arranged at an arbitrary position consistent with the length direction coordinate of the corresponding air port.

[0018] As a further implementation, the remote control terminal is located in a remote control room, and the remote control terminal is provided with an instantaneous wind speed calculation module for calculating the instantaneous wind speed according to the piston wind pressure, a comparison module for comparing the instantaneous wind speed with the design wind speed, and an air port height adjustment module for calculating the height adjustment stroke according to the instantaneous wind speed, the preset piston wind flow, and the preset initial height of the air port.

[0019] As a further implementation, the air valve is an electric valve structure.

[0020] The beneficial effects of the application are as follows:

[0021] (1) The present application is provided with a plurality of height-adjustable air outlets at intervals along the length direction of the platform door, and a pressure sensor is arranged at each air outlet, so that the remote control terminal can detect the piston wind pressure at different positions of the air outlets through the pressure sensor, and calculate the height adjustment stroke required by each air outlet at different positions, so that the piston wind flow of the air outlets at different positions meets the design requirements, solving the problem of uneven distribution of piston wind flow at different air outlets in the length direction of the existing platform.

[0022] (2) The pressure sensor of the present application is arranged on the side of the platform door close to the track, and is consistent with the length direction coordinate of the corresponding air outlet, which can ensure the accuracy of the piston wind pressure detection, and avoid hindering the normal operation of the train.

[0023] (3) The present application presets the design wind speed, the preset piston wind flow and the initial opening height of the air outlet, which can calculate the height adjustment stroke of the corresponding air outlet combined with the piston wind pressure at the air outlet, avoid the influence of different vehicle speeds on the uniformity of the piston wind, and greatly improve the adaptability of the platform door air outlet. BRIEF DESCRIPTION OF DRAWINGS

[0024] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and their explanation serve to explain the present application, and do not constitute an improper limitation of the present application.

[0025] Figure 1 is a schematic diagram of the wind speed distribution of the piston wind of the subway platform door air outlet described in the background art;

[0026] Figure 2 is a structural schematic diagram of the adjustable ventilation type platform door air outlet adjustment system of the present application according to one or more embodiments;

[0027] Figure 3 is a schematic diagram of the initial adjustment of the height of the air outlet at different positions according to one or more embodiments of the present application;

[0028] In the drawings: the mutual distance or size is exaggerated for the purpose of showing the position of each part, and the schematic diagram is only for illustrative use;

[0029] Among them, 1, platform door; 1.1, fixed door; 1.2, movable door; 2, air valve; 3, pressure sensor; 4, remote control terminal. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0031] As introduced in the background, the wind speed distribution of the subway platform door air outlet is extremely uneven, along the train entering direction, the wind speed of the platform air outlet shows a steep drop trend, most of the piston wind enters the platform from the air outlet at 0m-55m of the train entering end (0m is the position of the first air outlet passed by the train when entering the station), the wind speed at the air outlet of 55m-105m of the platform is very small (<1m / s, see the attached Figure 1 ), such wind speed distribution is extremely unfavorable for the air flow distribution of the platform and the station, in order to solve the above technical problems, the present application proposes a subway adjustable ventilation type platform door air outlet adjusting method and adjusting system.

[0032] Embodiment 1

[0033] In a typical embodiment of the present application, as shown in Figure 2 , a subway adjustable ventilation type platform door air outlet adjusting system is proposed, which comprises a platform door 1, a plurality of air outlets are arranged on the platform door 1 in the length direction (also understood as the train running direction) of the platform door 1, a wind valve 2 for adjusting the height (also understood as adjusting the area) of the air outlet is installed in the air outlet, a pressure sensor 3 is arranged near each air outlet, which is mainly used for detecting the piston wind pressure at each air outlet.

[0034] Among them, the pressure sensor 3 is arranged on the side of the platform door 1 close to the track, and the pressure sensor 3 can be arranged at any position consistent with the length direction coordinate of the corresponding air outlet.

[0035] Among them, the platform door 1 is divided into a fixed door 1.1 and a movable door 1.2, wherein the fixed door 1.1 is mainly used to isolate the train track from the platform, and the movable door 1.2 can be opened to assist passengers to get on or off the train.

[0036] A remote control terminal 4 is also provided, which is located in a remote control room, and the remote control terminal 4 is connected with the wind valve 2 and the pressure sensor 3, and the remote control terminal 4 is provided with an air outlet control strategy, which can convert the received pressure values at different air outlets into the instantaneous wind speed at the corresponding air outlet, and then compare it with the designed wind speed, and can control the wind valve 2 to adjust the height of the air outlet according to the comparison result.

[0037] Specifically, the remote control terminal 4 is provided with an instantaneous wind speed calculation module, a comparison module and an air outlet height calculation module, the instantaneous wind speed calculation module is used to collect the pressure data acting on the air outlet, and calculate the instantaneous wind speed at the corresponding air outlet according to the pressure data;

[0038] The comparison module can receive the instantaneous wind speed value transmitted by the instantaneous wind speed calculation module, and the comparison module is also pre-provided with a design wind speed corresponding to each different air port. Each air port corresponds to a design wind speed (the design wind speed between adjacent air ports is different). The comparison module can compare the received instantaneous wind speed with the design wind speed corresponding to the air port to determine whether to adjust the air valve 2.

[0039] The air port height calculation module is connected with the comparison module, and the air port height calculation module is mainly used for the calculation of air port height adjustment. The air port height calculation module is pre-provided with an initial height corresponding to each different air port. When the comparison module determines that the difference between the instantaneous wind speed and the corresponding design wind speed is large, the air port height calculation module can calculate the corresponding air port height according to the instantaneous wind speed, and then transmit the air port height adjustment value to the air valve 2, so that the air valve 2 adjusts according to the calculation value.

[0040] It can be understood that the air volume of the air port is adjusted by adjusting the area of the air port, and the area of the air port is equal to the length multiplied by the height. In the embodiment, the length of the air port is fixed and unchanged, and therefore, the height of the air valve 2 is changed to realize the change of the area of the air port.

[0041] The air valve 2 is an existing electric valve structure with automatic adjustment function, and the specific structure form will not be described here.

[0042] Embodiment 2

[0043] In another typical embodiment of the present application, considering the difference between the running speeds of trains, the adjustment of the air port height adopts process control adjustment, and a subway adjustable ventilation type platform door air port adjustment method is proposed. The remote control terminal 4 and the pressure sensor 3 are connected by a data acquisition line to collect the pressure data corresponding to different air ports of the platform door 1 and complete the calculation of the instantaneous wind speed at the corresponding air port according to the pressure data, so as to realize the real-time monitoring of the instantaneous wind speed of the air port. The path of the louver angle adjustment of the air port is calculated according to the size of the instantaneous wind speed of the air port. The air valve 2 adjusts according to the calculation path after receiving the adjustment signal, so as to realize the process control of the uniform distribution of the piston wind of the air port of the platform door 1.

[0044] Specifically as follows:

[0045] According to the multiple test data of the standard subway station air port wind speed, the functional relationship between the air port wind speed at different positions of the platform and the air port position is obtained, which is represented by formula (1):

[0046]

[0047] Wherein,

[0048] v c—The measured wind speed at different locations of the vent, in m / s;

[0049] x — Location of the air vent, in meters;

[0050] The design wind speed values ​​that meet the design requirements at different locations of the air vents during the train's entry into the station are calculated using formula (1), and the design wind speed values ​​at different locations of the air vents calculated using formula (1) are input into the remote control terminal 4.

[0051] Since the instantaneous wind speed at different locations of the air vents is different, to ensure that the air volume of each air vent is equal to the designed air volume, this is achieved by adjusting the area of ​​the air vent. The area of ​​the air vent is equal to the length multiplied by the height. In this embodiment, the length of the air vent is kept constant while the height is adjusted. The initial height of the air vents at different locations is determined by formula (2):

[0052]

[0053] in,

[0054] h c —Initial height of air vents at different locations, m / s;

[0055] Q g —The piston airflow rate (m) at different locations of the air vents as specified in the station design. 3 / s;

[0056] l — The length of a single air vent, which is a constant, in meters.

[0057] Formula (2) can be used to calculate the initial height of the air vent (e.g., the initial value of the piston airflow at the air vent at different locations that meets the station design specifications). Figure 3 As shown in the figure, the air vent opening is initially adjusted based on the calculated initial height, which serves as the adjustment benchmark for subsequent air vent height adjustment, facilitating the calculation of the height adjustment stroke of air valve 2.

[0058] Since different trains enter the station at different speeds, the wind speed at the vent when different trains enter the station is expressed by formula (3):

[0059]

[0060] in,

[0061] P s —Instantaneous piston air pressure at a certain air outlet, measured by a pressure sensor, in Pa;

[0062] v s —Instantaneous wind speed at the vent, m / s;

[0063] ρ—air density, kg / m³ 3 ;

[0064] The instantaneous wind speed of the air port at the position can be calculated according to the instantaneous piston wind pressure at the position measured by the pressure sensor 3 by using formula (3), and then the instantaneous wind speed can be compared with the preset wind speed design value of the air port at the corresponding position, when the wind speed difference between the instantaneous wind speed and the wind speed design value is within the difference range, the height of the air port is not adjusted, when the wind speed difference between the instantaneous wind speed and the wind speed design value exceeds the difference range, the height adjustment stroke is calculated and the height of the air valve 2 is controlled to be adjusted.

[0065] Specifically, the height adjustment stroke is represented by formula (4):

[0066]

[0067] Wherein,

[0068] Delta h is the stroke of the air port louver angle adjustment, m.

[0069] The height adjustment stroke can be calculated according to the instantaneous wind speed, the design specified piston wind flow, the length of the single air port and the initial opening height of the air port meeting the design requirements by using formula (4), so that the piston wind flow of the air port at different positions meets the design requirements, which can adapt to different vehicle speeds, and greatly improves the adaptability of the platform door air port.

[0070] It can be understood that the wind speed difference range of the instantaneous wind speed and the wind speed design value is set by the operator or the station management department, and the specific range is not limited here.

[0071] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A subway adjustable ventilation type platform door air outlet adjustment method, characterized in that, Specifically as follows: The design wind speed corresponding to the air outlet at different positions of the standard subway station platform and the preset piston wind flow are input into the remote control terminal; The initial opening height of the air outlet at different positions is calculated and the opening degree of the air outlet is initially adjusted; The instantaneous wind speed at the corresponding air outlet is calculated according to the piston wind pressure; The instantaneous wind speed is compared with the design wind speed, and when the difference exceeds the preset difference range, the height adjustment stroke corresponding to each air outlet is calculated and the corresponding air valve is controlled to be adjusted; The design wind speed is obtained according to multiple tests of the air outlet wind speed of the standard subway station, and a functional relationship between the air outlet wind speed at different positions of the platform and the air outlet position is obtained, which is represented by formula (1): （1） wherein, — measured wind speed at the tuyere at different positions, m / s; x — position of the tuyere, m; The design wind speed corresponding to the air outlet at different positions is calculated by formula (1), and the design wind speed corresponding to the air outlet at different positions calculated by formula (1) is input into the remote control terminal.

2. The method of claim 1, wherein, The preset piston wind flow is the piston wind flow corresponding to the air outlet at different positions specified by the station design.

3. The method of claim 1, wherein the method further comprises: The initial opening height of the air outlet is calculated according to the preset piston wind flow, the design wind speed and the length of a single air outlet.

4. The method of claim 1, wherein the method further comprises: The instantaneous wind speed is calculated by the piston wind pressure and the air density.

5. The method of claim 1, wherein the method further comprises: The height adjustment stroke is calculated by the instantaneous wind speed, the preset piston wind flow, the length of a single air outlet and the initial opening height of the air outlet.

6. A metro adjustable ventilation type platform screen door air port adjustment system according to the method of any one of claims 1-5, characterized in that, It comprises a platform door, a plurality of air outlets arranged above the platform door and spaced along the length direction, an air valve installed in the air outlet, and a remote control terminal, and a pressure sensor for detecting the piston wind pressure is arranged at each air outlet; the remote control terminal is connected with the air valve and the pressure sensor, and the remote control terminal is used for receiving the piston wind pressure and calculating the height adjustment stroke corresponding to the air outlet at different positions.

7. The metro adjustable ventilation type platform door air outlet adjusting system according to claim 6, characterized in that, The pressure sensor is arranged on the side of the platform door close to the track.

8. The metro adjustable ventilation type platform door air outlet adjusting system according to claim 6, characterized in that, The pressure sensor is arranged at any position consistent with the length direction coordinate of the corresponding air outlet.

9. The metro adjustable ventilation type platform door air outlet adjusting system according to claim 6, characterized in that, The remote control terminal is located in the remote control room, and the remote control terminal is provided with an instantaneous wind speed calculation module for calculating the instantaneous wind speed according to the piston wind pressure, a comparison module for comparing the instantaneous wind speed with the design wind speed, and an air outlet height adjustment module for calculating the height adjustment stroke according to the instantaneous wind speed, the preset piston wind flow and the preset initial height of the air outlet.

10. The metro adjustable ventilation type platform door air outlet adjusting system according to claim 6, characterized in that, The air valve is an electric valve structure.

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