Centralized integrated air duct for subway train

Abstract

The invention discloses a centralized integrated air duct for a subway train, which belongs to the technical field of subway trains, and comprises a longitudinal and transverse beam mounting framework, a static pressure air duct assembly and an air duct flow guide assembly, the upper part of the longitudinal and transverse beam mounting framework is provided with a plurality of top connecting seats; the static pressure air duct assemblies are arranged on the two sides of the longitudinal and transverse beam installation framework, the air duct flow guide assembly is arranged between the two static pressure air duct assemblies and arranged in the middle of the longitudinal and transverse beam installation framework, and the longitudinal and transverse beam installation framework, the static pressure air duct assemblies and the air duct flow guide assembly are integrated into an integrated structure. The framework and the ceiling are sequentially installed, the integrated middle roof is adopted for overall assembly, the installation procedures are greatly reduced, the static pressure air duct assembly is installed in a modularized and regional mode, and the butt joint mode is faster and more convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of subway trains, and in particular is a centralized integrated air duct for subway trains. Background Art

[0002] The air duct system of subway trains plays a key role in improving passenger comfort and air quality inside the train. The air duct effectively guides and distributes air to ensure the appropriate temperature and smooth air circulation inside the train, thereby optimizing the passenger experience. In addition, the air duct design also affects the energy efficiency and operating noise of the train. Therefore, an efficient and reliable air duct system is crucial for modern subway trains. The structural design of the standardized subway better meets the standardized design of the subway interior, while also making the interior lighter.

[0003] However, the traditional air duct installation method has significant shortcomings. Usually, the air duct, frame and ceiling need to be installed in sequence, resulting in cumbersome procedures, long and complicated installation time, increased labor costs, and more difficult maintenance and inspection processes. Since traditional air ducts often need to be disassembled as a whole for inspection, the advantages of the overall structure of the train are not effectively utilized, resulting in low overall maintenance efficiency. Summary of the invention

[0004] The object of the present invention is to provide a centralized integrated air duct for a subway train to solve the problems raised in the above-mentioned prior art.

[0005] Provided is a centralized integrated air duct for a subway train, comprising:

[0006] A longitudinal and transverse beam installation frame, wherein a plurality of top connection seats are arranged on the upper part of the longitudinal and transverse beam installation frame;

[0007] Static pressure air duct components, which are arranged on both sides of the longitudinal and transverse beam mounting frame;

[0008] An air duct guide component is provided between the two static pressure air duct components, and the air duct guide component is provided in the middle of the longitudinal and transverse beam mounting frame.

[0009] As a further embodiment of the present invention: the longitudinal and transverse beam mounting frames are connected to the vehicle body roof cover plate through the top connecting seat, the lower part of the longitudinal and transverse beam mounting frames is connected to the middle top plate, the lower part of the longitudinal and transverse beam mounting frames is connected to the vehicle body middle top plate, the cross beam mounting frames are connected to the vehicle body roof cover plate through the top connecting seat, and the lower part of the longitudinal and transverse beam mounting frames is connected to the vehicle body middle top plate. This connection method ensures the stability and integrity of the cross beams, can effectively bear the weight of the air duct and the airflow pressure, and uses welding technology to reduce the process of fastener connection, simplify the installation process, reduce labor and time costs, and at the same time, reduce the overall weight of the longitudinal and transverse beam mounting frames to achieve a lightweight design.

[0010] As a further embodiment of the present invention: the static pressure air duct assembly includes a plurality of air duct connection boxes, which are connected to each other end to end. A modular design is adopted so that each air duct connection box can be independently produced and maintained, and is convenient for assembly and replacement. In the design of the air duct connection box, lightweight materials and structural optimization are adopted to reduce the overall weight of the air duct. The lightweight design reduces the burden on the vehicle body structure, helps to improve the overall energy efficiency and operating performance of the train. At the same time, the lightweight air duct assembly also makes the transportation and installation process more convenient. The fast and seamless docking method reduces the installation time and process, reduces labor costs, and improves the overall efficiency of the production and assembly of the entire centralized integrated air duct.

[0011] As a further embodiment of the present invention: a concave clamping strip and a convex clamping strip are respectively arranged on both sides of the upper part of each of the air duct connection boxes, and the head and tail of two adjacent air duct connection boxes are clamped together by the concave clamping strip and the convex clamping strip, and the head and tail of two adjacent air duct connection boxes are clamped together by the concave clamping strip and the convex clamping strip. The concave and convex surface designs can effectively prevent airflow leakage, improve the static pressure performance of the overall airflow, and ensure the smooth flow of air in the air duct. The clamping method simplifies the installation process. The operator only needs to align the clamping strip for plugging, and there is no need to use additional tools or fasteners, thereby significantly improving the assembly efficiency.

[0012] As a further embodiment of the present invention: static pressure partitions are arranged inside several of the air duct connection boxes, which help to divide the internal space of the air duct, evenly distribute the airflow, and reduce the static pressure difference caused by uneven airflow, thereby ensuring that the air flows at a stable speed in the entire air duct.

[0013] As a further embodiment of the present invention: air outlet grilles are provided on both sides of the lower part of the longitudinal and transverse beam mounting frame. The air outlet grilles are located on both sides of the lower part of the longitudinal and transverse beam mounting frame, and can evenly guide the air to be discharged from the inside of the air duct. This layout ensures the uniform distribution of airflow inside the car, effectively improves the air quality in the car and the comfort of passengers. The design of the air outlet grille can reduce airflow resistance and ensure that no eddy currents or turbulence are generated when the air flows through the air duct system, thereby improving air flow efficiency and reducing operating noise. The detachable design of the air outlet grille makes the maintenance of the air duct system more convenient. When the air duct needs to be inspected or cleaned, it is only necessary to remove the air outlet grille to directly access the internal air duct without dismantling most of the structure, which significantly improves the maintenance efficiency.

[0014] As a further embodiment of the present invention: the air duct guide assembly includes a plurality of air duct partitions and a plurality of guide plates, and the plurality of air duct partitions are evenly arranged above the longitudinal and transverse beam mounting frames along the length direction, and the plurality of guide plates are evenly arranged above the longitudinal and transverse beam mounting frames along the length direction. The arrangement of the air duct partitions and guide plates helps to evenly distribute the airflow, reduce dead angles, ensure smooth air flow in the air duct, and improve static pressure efficiency. The guide plate is welded from two semicircular arc plates, and the semicircular arc is between 30 and 60°, which can effectively guide the airflow without generating too much resistance. A small arc may cause the airflow to be not smooth, while a large arc may cause airflow separation. The layout of the partitions and guide plates enhances the stability of the overall structure, ensures that it is not easily deformed under airflow pressure, and maintains the performance of the air duct.

[0015] As a further embodiment of the present invention: several of the air duct partitions are provided with air duct sealing cotton boards on their upper parts. The setting of the air duct sealing cotton boards can effectively prevent airflow leakage and enhance the air tightness of the air duct, thereby improving the overall static pressure performance and ensuring that the air can flow more effectively in the air duct. The air duct sealing cotton boards have good sound absorption properties and can effectively reduce the noise generated when the airflow passes through the air duct, thereby improving the comfort of the passengers. The design of the air duct sealing cotton boards makes it easy to disassemble and replace, and facilitates subsequent maintenance and maintenance, thereby ensuring the long-term and effective operation of the air duct system.

[0016] As a further embodiment of the present invention: both end faces of the static pressure air duct assembly are provided with end sealing plates, which seal the openings on both sides of the static pressure air duct assembly to prevent airflow from leaking at the end of the air duct, and ensure that the air flows in the air duct according to the designed path. This design effectively improves the efficiency of the airflow and reduces energy loss. The end sealing plates enhance the air tightness of the air duct assembly, ensuring that the air pressure in the air duct can be maintained stable, and the performance will not be reduced due to poor sealing at the end of the air duct, thereby ensuring the overall stability and effectiveness of the air duct system.

[0017] As a further embodiment of the present invention: a subway train includes a vehicle body roof cover and a centralized integrated air duct arranged on the upper part of the vehicle body roof cover, and the centralized integrated air duct is specifically any one of the centralized integrated air ducts described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The design of this application realizes modular and regional installation by concentrating the static pressure air duct components at the middle top position, so that each module can be installed, maintained and replaced independently, improving the flexibility of the system. The use of concave and convex flange docking method simplifies the connection process, reduces installation time and complexity, and the fast and convenient docking method enables multiple modules to be quickly assembled, thereby improving production efficiency.

[0020] 2. Integrate the longitudinal and transverse beam installation frame, static pressure air duct components and air duct guide components into an integrated structure, change the traditional order of installing the air duct, frame and ceiling in sequence, adopt integrated middle top overall assembly, greatly reduce the installation process, modularize and install the static pressure air duct components in different areas, and use concave and convex flanges to connect each module of the static pressure air duct components, which is faster and more convenient. The centralized middle top is modularly installed in different areas through the handrail position, and the air duct concave and convex flanges are used for connection, which is faster and more convenient. The longitudinal and transverse beams are connected by small cross beam frame bolts, and the end connection strength is higher, which can simplify the installation process, improve the flexibility and maintenance convenience of the system, thereby improving the operating efficiency of subway trains. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present drawings or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present drawings. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 A schematic top view of the overall structure provided by the present invention;

[0024] Figure 3 A schematic diagram of a side view structure provided by an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of an air duct guide assembly provided in an embodiment of the present invention;

[0026] Figure 5 A schematic cross-sectional structure diagram of a static pressure air duct assembly provided in an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of a test position provided in an embodiment of the present invention.

[0028] In the figure: 1. longitudinal and transverse beam mounting frame; 101. top connecting seat; 102. air outlet grille; 2. static pressure air duct assembly; 201. air duct connecting box; 2011. concave clamping strip; 2012. convex clamping strip; 2013. static pressure partition; 3. air duct guide assembly; 301. air duct partition; 302. guide plate; 303. air duct sealing cotton plate; 4. end sealing plate; 5. vehicle body roof cover plate; 6. vehicle body middle top plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0030] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0031] However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application and are not intended to limit the subject matter described in the claims.

[0032] See also Figure 1-6 As shown, a centralized integrated air duct for a subway train in an embodiment of the present invention comprises a longitudinal and transverse beam mounting frame 1, a static pressure air duct assembly 2 and an air duct guide assembly 3, and a plurality of top connecting seats 101 are arranged on the upper part of the longitudinal and transverse beam mounting frame 1;

[0033] Static pressure air duct assembly 2, the static pressure air duct assembly 2 is arranged on both sides of the longitudinal and transverse beam mounting frame 1, the static pressure air duct assembly 2 is responsible for balancing the airflow in the vehicle to ensure that the air flows at a uniform speed, the static pressure air duct assembly 2 removes the bottom plate and the top plate to divide the entire air duct into multiple modular components, and becomes two static pressure air duct assemblies 2 on the side, each modular component adopts a head-to-tail mutual clamping structure, and is sealed with a sealing strip to ensure seamless connection between the components, thereby reducing airflow loss and improving airflow efficiency;

[0034] An air duct guide component 3 is arranged between the two static pressure air duct components 2. The air duct guide component 3 is arranged in the middle of the longitudinal and transverse beam mounting frame 1. The air duct guide component 3 is responsible for guiding and distributing the airflow to ensure that the airflow is evenly distributed in various areas in the vehicle. Its shape and layout are optimized to reduce the turbulence and resistance of the airflow.

[0035] The longitudinal and transverse beam installation skeleton 1 is used as the supporting structure of the entire air duct. The structure of the longitudinal and transverse beam installation skeleton 1 is optimized. The welding structure has higher strength than the bolt connection, and reduces the fastener connection process and weight. The air duct beam and the cross beam are locked. The profile has no slider groove section, and the longitudinal and transverse beam profile is lighter. The weight of a single module is reduced from 67kg to 48kg. The longitudinal and transverse beam installation skeleton 1 provides the necessary strength and stability. The longitudinal and transverse beam installation skeleton 1 is used as the supporting structure of the entire air duct. The longitudinal and transverse beam installation skeleton 1 is butt-jointed and installed with a welding structure, and the module is butt-jointed with an L-shaped bracket bolt. Through welding and bolt connection, each beam body forms a solid frame to support other components and ensure the durability of the overall structure. Through welding and bolt connection, each beam body forms a solid frame to support other components and ensure the durability of the overall structure. The static pressure air duct component 2 is responsible for balancing the airflow in the car and ensuring that the air flows at a uniform speed. The design adopts concave and convex flange docking to ensure seamless connection between components, thereby reducing airflow loss and improving airflow efficiency.

[0036] The air duct guide component 3 is located between the two static pressure air duct components 2, and is responsible for guiding and distributing the airflow to ensure that the airflow is evenly distributed in various areas of the vehicle. Its shape and layout have been optimized to reduce the turbulence and resistance of the airflow. The integrated mid-top design combines the air duct and the body structure to make the airflow channel smoother. By using the top cover and the mid-top plate as the upper and lower cover plates, the redundant components in the traditional structure are reduced, and the weight and installation difficulty are reduced. By concentrating the static pressure air duct component 2 at the mid-top position, modular and regional installation is achieved, so that each module can be independently installed, maintained and replaced, which improves the flexibility of the system. The use of concave and convex flange docking simplifies the connection process, reduces installation time and complexity, and the fast and convenient docking method enables multiple modules to be quickly assembled, improving production efficiency.

[0037] The longitudinal and transverse beam mounting frame 1, the static pressure air duct assembly 2 and the air duct guide assembly 3 are integrated into an integrated structure, changing the traditional order of installing the air duct, the frame and the ceiling in sequence. The integrated middle top is adopted for overall assembly, and the installation process is greatly reduced. The static pressure air duct assembly 2 is modularly installed in different areas. Each module of the static pressure air duct assembly 2 is connected by concave and convex flanges, which is faster and more convenient. The centralized middle top is modularly installed in different areas through the handrail position, and the air duct concave and convex flanges are used for connection, which is faster and more convenient. The longitudinal and transverse beams and small cross beam frame bolts are used for connection, and the end connection strength is higher.

[0038] In a specific embodiment, please refer to Figure 1The longitudinal and transverse beam mounting frame 1 is connected to the vehicle body roof cover plate 5 through the top connecting seat 101, and the lower part of the longitudinal and transverse beam mounting frame 1 is connected to the vehicle body middle roof plate 6. The longitudinal and transverse beam mounting frame 1 is connected to the vehicle body roof cover plate 5 through the top connecting seat 101, and the lower part of the longitudinal and transverse beam mounting frame 1 is connected to the vehicle body middle roof plate 6, which ensures the stability and integrity of the longitudinal and transverse beam mounting frame 1, and can effectively bear the weight and airflow pressure of the static pressure air duct assembly 2. The use of welding technology reduces the process of fastener connection, simplifies the installation process, and reduces labor and time costs. At the same time, the overall weight of the longitudinal and transverse beam mounting frame 1 is reduced, and a lightweight design is achieved. The integrated middle roof solution is adopted, and the inspection and maintenance of the air duct is more convenient and quick, and fewer cleaning parts are required during air duct maintenance.

[0039] In one embodiment, see Figure 1 , Figure 4 and Figure 5 The static pressure air duct assembly 2 is composed of a plurality of air duct connection boxes 201, which are connected to each other end by end. The modular design allows each air duct connection box 201 to be independently produced and maintained, and is easy to assemble and replace. In the design of the air duct connection box 201, lightweight materials and structural optimization are used to reduce the overall weight of the air duct. The lightweight design reduces the burden on the body structure, which helps to improve the overall energy efficiency and operating performance of the train. At the same time, the lightweight air duct assembly also makes the transportation and installation process more convenient. The fast and seamless docking method reduces the installation time and process, reduces labor costs, and improves the overall efficiency of the production and assembly of the entire centralized integrated air duct. The air duct adopts an integrated structure for self-sealing at the end. Since the integrated top component has no upper cover plate and lower bottom plate, the end needs to form a sealed space with the body and ceiling. The end sealing plate is riveted to ensure the enclosed space of the entire air duct to prevent cold and warm air flows from leaking from the end.

[0040] In a specific embodiment, an integrated middle top is used for overall assembly, with fewer installation processes, lightweight structure, high interchangeability, and low use cost. The bottom plate and top plate are removed, and the air duct as a whole is lighter. A flange concave-convex seamless docking structure is used to ensure the strength of the docking, achieve the limit position of the front, back, left, and right positions of the air duct, and the plug-in sealing is higher than that of the plane docking.

[0041] In one embodiment, see Figure 1 , Figure 4 and Figure 5A concave card strip 2011 and a convex card strip 2012 are respectively arranged on both sides of the upper part of each air duct connection box 201. The ends of two adjacent air duct connection boxes 201 are connected to each other through the concave card strip 2011 and the convex card strip 2012. The concave and convex designs can effectively prevent airflow leakage, improve the static pressure performance of the overall airflow, and ensure the smooth flow of air in the air duct. The card connection method simplifies the installation process. The operator only needs to align the card strips for plugging, without using additional tools or fasteners, which significantly improves the assembly efficiency.

[0042] In one embodiment, see Figure 1 , Figure 4 and Figure 5 Several air duct connection boxes 201 are provided with static pressure baffles 2013 inside. The static pressure baffles 2013 help to separate the internal space of the air duct, evenly distribute the airflow, and reduce the static pressure difference caused by uneven airflow, thereby ensuring that the air flows at a stable speed in the entire air duct. The static pressure baffles 2013 can guide the airflow to flow along a predetermined path, reduce the turbulence and disorder of the airflow, thereby improving the airflow efficiency and reducing noise. The static pressure baffles 2013 can increase the overall structural strength of the air duct connection box 201, prevent deformation caused by airflow pressure, and maintain the stability and integrity of the air duct. The static pressure baffles 2013 help to improve the static pressure performance of the air duct, so that the air duct can better maintain the required airflow pressure during operation. The static pressure baffles 2013 can prevent dust and debris from accumulating in the air duct, facilitate maintenance and cleaning, and ensure the long-term and efficient operation of the air duct.

[0043] In one embodiment, see Figure 1 , Figure 2 and Figure 3 Air outlet grilles 102 are provided on both sides of the lower part of the longitudinal and transverse beam mounting frame 1. The air outlet grilles 102 are located on both sides of the lower part of the longitudinal and transverse beam mounting frame 1, and can evenly guide the air to be discharged from the inside of the air duct. This layout ensures the uniform distribution of airflow inside the car, effectively improving the air quality and passenger comfort in the car. The design of the air outlet grilles 102 can reduce airflow resistance and ensure that no eddy currents or turbulence are generated when the air flows through the air duct system, thereby improving air flow efficiency and reducing operating noise. The detachable design of the air outlet grilles 102 makes the maintenance of the air duct system more convenient. When the air duct needs to be inspected or cleaned, it is only necessary to remove the air outlet grilles 102 to directly access the internal air duct without dismantling most of the structure, which significantly improves the maintenance efficiency.

[0044] Specifically, see Figure 1 , Figure 3 and Figure 4The air duct guide assembly 3 includes a plurality of air duct partitions 301 and a plurality of air guide plates 302. The plurality of air duct partitions 301 are evenly arranged above the longitudinal and transverse beam mounting frame 1 along the length direction, and the plurality of air guide plates 302 are evenly arranged above the longitudinal and transverse beam mounting frame 1 along the length direction. The arrangement of the air duct partitions 301 and the air guide plates 302 helps to evenly distribute the airflow, reduce dead angles, ensure smooth air flow in the air duct, and improve static pressure efficiency. The air guide plate 302 is welded by two semicircular arc plates, which can effectively guide the airflow without generating too much resistance. If the arc is too small, the airflow may not be smooth, while if it is too large, it may cause airflow separation. The layout of the air duct partitions 301 and the air guide plates 302 enhances the stability of the overall structure, ensures that it is not easy to deform under the airflow pressure, and maintains the performance of the air duct.

[0045] For further information, see Figure 1 , Figure 3 and Figure 4 A plurality of duct partitions 301 are each provided with duct sealing cotton plates 303 on their upper parts. The setting of the duct sealing cotton plates 303 can effectively prevent airflow leakage and enhance the air tightness of the duct, thereby improving the overall static pressure performance and ensuring that the air can flow more effectively in the duct. The duct sealing cotton plates 303 have good sound absorption properties and can effectively reduce the noise generated when the airflow passes through the duct, thereby improving the comfort of the passengers. The design of the duct sealing cotton plates 303 makes it easy to disassemble and replace, and facilitates subsequent maintenance and maintenance, thereby ensuring the long-term and effective operation of the duct system.

[0046] For further information, see Figure 1 , Figure 3 and Figure 4 The end faces of the static pressure air duct assembly 2 are both provided with end sealing plates 4, which seal the openings on both sides of the static pressure air duct assembly 2 to prevent airflow from leaking at the end of the air duct, and ensure that the air flows in the air duct according to the designed path. This design effectively improves the efficiency of the airflow and reduces energy loss. The end sealing plates 4 enhance the air tightness of the air duct assembly, ensuring that the air pressure in the air duct can be maintained stable, and the performance will not be reduced due to poor sealing at the end of the air duct, thereby ensuring the overall stability and effectiveness of the air duct system.

[0047] Furthermore, the mid-top integration project completes the integrated assembly of the top of the vehicle body by integrating the mid-top panel 6, static pressure air duct assembly 2, longitudinal and transverse beam mounting frame 1 and air outlet grille into a single module. The overall assembly efficiency is higher and the interior products are lighter. Through air duct tests and integrated module vibration and impact tests, it can be concluded that the roof as the air duct top cover and the mid-top panel as the air duct bottom plate are feasible, and the overall air volume, uniformity and noise tests are all qualified. In addition, the longitudinal and transverse beam mounting frame 1 has higher welding strength and better fatigue resistance.

[0048] In Table 1-4, side A is the front of the centralized integrated air duct (such as Figure 1 As shown); Side B is the rear of the centralized integrated air duct (as shown Figure 1 As shown); Side C is the bottom of the centralized integrated air duct (as shown Figure 3 shown).

[0049] The present invention is described in more detail below in conjunction with specific example experimental data.

[0050] The centralized integrated air duct for subway trains in this implementation includes the following designs:

[0051] 1. The middle roof panel 6 of the vehicle body is welded by aluminum plate and profile frame; 2mm aluminum plate is used to reduce the overall weight of the middle roof panel 6 of the vehicle body, and the overall structural strength is enhanced by frame welding. The joint gap of the middle roof panel is blocked by seam blocking strips. The connection position of the middle roof panel 6 of the vehicle body is connected by welding the middle roof panel clip strips and the upper longitudinal and transverse beam mounting frame 1 bolt connection and the side air outlet grille 102 clip connection;

[0052] 2. The cross-beam installation frame 1 adopts cross-section optimization, reduces slots, and is connected by welding to achieve lightweight while increasing structural strength. At the same time, the cross-beam docking position is connected by L-shaped bracket bolts to increase docking strength.

[0053] 3. The static pressure air duct assembly 2 removes the upper and lower covers and uses the vehicle body top cover 5 and the vehicle body middle top plate 6 as the upper cover and lower bottom plate structures of the air duct. At the same time, the air duct is butt-jointed by concave and convex flanges to ensure seamless connection at the air duct joint position.

[0054] 4. The air outlet grille 102 and the handrail are installed in an avoidance position and are installed using grille clips.

[0055] The above-mentioned technical solution was tested, and the test results and data are as follows. The performance test methods and results of some of the above-mentioned embodiments are as follows:

[0056] Centralized integrated air duct uniformity test;

[0057] Test location: half section of TC car air duct; Measuring instrument: flow hood; Test conditions: the air duct is not covered with a top cover;

[0058] Wind speed unit: m / s; air volume unit: m 3 / h; s represents the air volume;

[0059] Table 1 shows the test results of air volume uniformity of the integrated middle top air duct;

[0060]

[0061]

[0062] Noise test at 200mm from the bottom of the centralized integrated air duct;

[0063] Noise test:

[0064] Test location: Side A is in front of the centralized integrated air duct; Side B is behind the centralized integrated air duct;

[0065] Noise unit: dB;

[0066] Noise test:

[0067] Test location: 200mm from the bottom of the centralized integrated air duct (TC car half-section air duct);

[0068] Measuring instrument: handheld noise meter; Test conditions: the air duct is not covered with a top cover; P represents noise (dB);

[0069] Table 2 shows the noise test results at a distance of 200mm from the bottom of the centralized integrated air duct (TC car half-section air duct);

[0070]

[0071]

[0072] Noise test at 500mm from the bottom of the centralized integrated air duct;

[0073] Test location: Side A is in front of the centralized integrated air duct; Side B is behind the centralized integrated air duct;

[0074] Noise unit: dB;

[0075] Noise test:

[0076] Test location: 500mm from the bottom of the centralized integrated air duct (TC car half-section air duct);

[0077] Measuring instrument: handheld noise meter; Test conditions: the air duct is not covered with a top cover; P represents noise (dB);

[0078] Table 3 shows the noise test results at a distance of 500mm from the bottom of the centralized integrated air duct (TC car half-section air duct);

[0079]

[0080]

[0081] Centralized integrated air duct resistance test:

[0082] Test location: 1. The connection between the air duct and the air conditioner (area D in the figure); 2. The air outlet of the air duct (area E in the figure);

[0083] Resistance unit: dB;

[0084] Resistance test:

[0085] Test location: 200mm from the bottom of the centralized integrated air duct (TC car half-section air duct);

[0086] Measuring instrument: YJB-2500 compensated micromanometer; Test conditions: The air duct is not covered with a top cover; P represents noise (dB);

[0087] Test position 1 is Figure 6 Middle D area; test position 2 is Figure 6 Middle E area;

[0088] Test location 3 is Figure 6 Middle F area; test position 3 is Figure 6 Middle G area.

[0089] Table 4 shows the integrated middle top wind duct resistance test results;

[0090]

[0091] This integrated center roof air duct test meets the requirements of the integrated center roof air volume uniformity, air duct resistance, air tightness and noise specified in the test outline. Overall qualified

[0092] 1. The research on integrated center roof has realized the centralized direction: the longitudinal and transverse beam installation frame 1, the static pressure air duct assembly 2, the roof center roof panel 6, and the air outlet grille 102 are integrated into an integrated structure, breaking the traditional order of installing the air duct, frame and ceiling in sequence, and adopting the integrated center roof as a whole assembly, which greatly reduces the installation process.

[0093] 2. The research on integrated center top realizes the modularization direction: the centralized center top is modularly installed in different areas through the handrail position, and the concave and convex flanges of the air duct are used for docking, which is faster and more convenient. The longitudinal and transverse beams and small cross beams are connected by bolts, and the end connection strength is higher.

[0094] 3. The research on integrated top-up has achieved the direction of lightweighting: by welding the longitudinal and transverse beam installation frame 1 and optimizing the profile cross-section, the upper and lower covers of the air duct are optimized to achieve weight reduction. The longitudinal and transverse beam installation frame 1 is welded and the redundant bolt fasteners are removed to reduce the weight. The static pressure air duct assembly 2 adopts the structure of the vehicle body roof cover plate 5 as the top plate and the vehicle body roof cover plate 5 as the bottom plate.

[0095] 4. The research on integrated top-down has achieved low-cost and high-efficiency development. The weight has been reduced by 33.3% through lightweight processing of the integrated structure, and the production cost has been reduced by 40%. While achieving rapid assembly, the production cost has been greatly reduced.

[0096] 5. The integrated center-top research has passed the requirements of the center-top integrated procurement technical specifications, and the tests have passed all the regulations of the center-top integration test outline. The overall appearance size and performance tests are qualified, and this research plan is feasible.

[0097] Specific reference standards and reference documents for the tests of the present invention;

[0098] 7.1、EN15085《Railway applications - welding of rolling stock and rolling stock components》

[0099] 7.2、EN 45545-2-2020《Railway applications Fire protection for railway vehicles Part 2: Fire performance requirements for materials and components》

[0100] 7.3. TB / T 3139-2021 "Limits of Hazardous Substances in Non-metallic Materials of Rolling Stocks and Indoor Air"

[0101] 7.4. QTXQ2-003-2015 "Prohibited Substances in Rail Transit Products"

[0102] 7.5. GB / T21563-2018 Shock and vibration test for rail transit rolling stock equipment

[0103] 7.6、ISO3381-2005 Acoustics 《Measurement of interior noise of rail transit vehicles》

[0104] 7.7. DIN6701-1-2004 "Bonding of rail vehicles and rail vehicle accessories"

[0105] 7.8. EN755-1 "Aluminium and aluminium alloy extruded short bars, tubes and profiles, inspection and delivery technical status"

[0106] 7.9. EN755-2 "Aluminium and aluminium alloy extruded rods / bars, tubes and profiles, mechanical properties"

[0107] 7.10, EN755-9 "Aluminium and aluminium alloy extruded short bars, tubes and profiles, profile size and shape tolerances"

[0108] 7.11、EN 573-3《Aluminium and aluminium alloys - Chemical composition and shape of wrought products》

[0109] 7.12, TB / T3246.2 "Design Guidelines for Rolling Stock and Its Components - Bolted Connections Part 2"

[0110] 7.13、ISO2768-mK "Standard for shape tolerance requirements without tolerance requirements in machining"

[0111] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A centralized integrated air duct for a subway train, characterized in that: include: A longitudinal and transverse beam installation frame (1), wherein a plurality of top connection seats (101) are arranged on the upper part of the longitudinal and transverse beam installation frame (1); A static pressure air duct assembly (2), wherein the static pressure air duct assembly (2) is arranged on both sides of the longitudinal and transverse beam mounting frame (1); An air duct guide component (3) is provided between the two static pressure air duct components (2), and the air duct guide component (3) is provided in the middle of the longitudinal and transverse beam mounting frame (1).

2. The centralized integrated air duct for subway trains according to claim 1, characterized in that: The longitudinal and transverse beam installation framework (1) is connected to a vehicle body roof cover plate (5) via a top connection seat (101), and the lower part of the longitudinal and transverse beam installation framework (1) is connected to a vehicle body middle roof plate (6).

3. The centralized integrated air duct for subway trains according to claim 2, characterized in that: The static pressure air duct assembly (2) comprises a plurality of air duct connection boxes (201), and the plurality of air duct connection boxes (201) are mutually clamped end to end.

4. The centralized integrated air duct for subway trains according to claim 3, characterized in that: A concave clamping strip (2011) and a convex clamping strip (2012) are respectively arranged on both sides of the upper part of each of the air duct connection boxes (201), and the ends of two adjacent air duct connection boxes (201) are mutually clamped by the concave clamping strip (2011) and the convex clamping strip (2012).

5. The centralized integrated air duct for subway trains according to claim 4, characterized in that: Static pressure baffles (2013) are arranged inside the plurality of air duct connection boxes (201).

6. The centralized integrated air duct for subway trains according to claim 1, characterized in that: Air outlet grilles (102) are arranged on both sides of the lower part of the longitudinal and transverse beam installation frame (1).

7. The centralized integrated air duct for subway trains according to claim 1, characterized in that: The air duct guide assembly (3) comprises a plurality of air duct partitions (301) and a plurality of guide plates (302), wherein the plurality of air duct partitions (301) are evenly arranged above the longitudinal and transverse beam mounting frame (1) along the length direction, and the plurality of guide plates (302) are evenly arranged above the longitudinal and transverse beam mounting frame (1) along the length direction.

8. The centralized integrated air duct for subway trains according to claim 7, characterized in that: An air duct sealing cotton plate (303) is arranged on the upper part of a plurality of the air duct partition plates (301).

9. The centralized integrated air duct for subway trains according to claim 1, characterized in that: End sealing plates (4) are provided on both side end surfaces of the static pressure air duct assembly (2).

10. A subway train, comprising a car body roof cover (5) and a centralized integrated air duct arranged on the upper part of the car body roof cover (5), characterized in that: The centralized integrated air duct is specifically the centralized integrated air duct described in any one of claims 1 to 9.

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