Ventilation device for balancing train end air pressure difference

Abstract

In order to solve the problem of bulging deformation of an inner windshield caused by air pressure fluctuation in the external environment of a high-speed motor train unit, the invention provides the ventilation device for balancing the air pressure difference at the train end of the train. Comprising a ventilation window communicating the inside and the outside of a vehicle, a gas circuit partition installed in the ventilation window and a turnover cover plate installed at one end of the ventilation window. The ventilation window is fixed in a through opening of the inner windshield middle frame in the thickness direction; the gas path partition consists of zigzag plates which are distributed at intervals and form channels; the zigzag plates are fixedly connected with the ventilation window and are low in two ends and high in the middle along the thickness direction of the ventilation window; a turnover cover plate is arranged at one end of the ventilation window, and the cover plate and the ventilation window are in a sealed state before the cover plate is turned over; before and after the cover plate is overturned, one end, far away from the overturning center shaft, of the cover plate is detachably and fixedly connected with the middle frame; the device has the advantage that when a train encounters air pressure fluctuation, air can be kept to flow freely so as to balance the pressure.

Description

Technical Field

[0001] The invention relates to a rail vehicle, in particular to a ventilation device for balancing the air pressure difference at a train end of the rail vehicle. Background Art

[0002] Windshields are installed between two adjacent carriages of the train. After the windshields are installed, a sealed space is formed at the end of the train, so that wind, rain, snow, dust and other external environment of the train cannot enter the interior of the train. When two high-speed EMUs are traveling in opposite directions and meet each other, there will be huge air pressure fluctuations in the air around the trains. In terms of passenger perception, it will appear as a sudden sway of the train toward the non-meeting side. This air pressure fluctuation will have a great impact on the windshield inside the flexible component installed at the adjacent ends of the train. The external air pressure of the train drops sharply in an instant, causing the inner windshield to swell and deform. When the external air pressure returns to the same air pressure as that inside the passenger compartment, the inner windshield returns to normal. If the external air pressure of the train frequently experiences air pressure fluctuations in a short period of time, the inner windshield will frequently swell, deform, recover and deform again, affecting the riding comfort of the driver and passengers and reducing the service life of the windshield. Since this deformation is an inevitable phenomenon in the windshield structure of existing EMUs during the train meeting stage, and my country has a vast territory and a long operating mileage of high-speed trains, meeting is a common and frequent phenomenon, and the external air pressure fluctuations may also be caused by other conditions, as long as this air pressure fluctuation exists, the inner windshield will cause deformation and recovery alternately. Summary of the invention

[0003] In order to solve the problem that the inner windshield of a high-speed EMU train may bulge and deform due to air pressure fluctuations in the external environment of the train, the present invention provides a ventilation device for balancing the air pressure difference at the train end.

[0004] The ventilation device for balancing the air pressure difference at the end of a train described in the present invention comprises a ventilation window connecting the inside and outside of the car, an air path partition fixedly installed in the ventilation window, and a flippable cover plate fixedly installed at one end of the ventilation window; the ventilation window is fixedly installed in a through opening of the middle frame of the inner windshield along the thickness direction; the air path partition is composed of folding plates that are spaced apart from each other and form channels with each other, the folding plates are fixedly connected to the ventilation window and are low at both ends and high in the middle along the thickness direction of the ventilation window; a flippable cover plate is provided at one end of the ventilation window, and the cover plate is in a sealed state with the ventilation window before it is flipped; before and after the cover plate is flipped, the end of the cover plate away from the flipping center axis is detachably fixedly connected to the middle frame.

[0005] Furthermore, the cover plate is arranged at one end of the ventilation window outside the vehicle, and a sealing cotton higher than the inner surface of the cover plate is provided on the inner surface of the cover plate. Before the cover plate is flipped over, it is sealed with the ventilation window through the sealing cotton.

[0006] Furthermore, a hinge is fixedly provided at one end of the cover plate, and is fixedly connected to the middle frame via the hinge, and the non-hinged end of the cover plate is fixedly connected to the middle frame via screws before and after flipping.

[0007] Furthermore, a partition is provided between the ventilation window and the cover plate, and a plurality of ventilation holes are provided on the partition plate. When the cover plate is kept in a closed state, the partition plate further provides support for the cover plate, the sealing cotton contacts with the partition plate to achieve the sealing of the inner windshield, and the opening of the partition plate provides an inlet and outlet for air flow.

[0008] Furthermore, the ventilation window is fixedly connected to a filter cotton installation frame at one end in the vehicle, and the filter cotton installation frame is pressed on the end surface of the filter cotton and is provided with a plurality of ventilation holes, and filter cotton is arranged between the ventilation window and the filter cotton installation frame. The filter cotton reduces the air flow speed under air pressure fluctuations, reduces the noise caused by excessive air flow speed, and can filter dust; the filter cotton installation frame provides a directional support for the filter cotton to prevent the filter cotton from falling, and the ventilation holes of the filter cotton installation frame provide an inlet and outlet for air flow.

[0009] Furthermore, after the cover plate is flipped 180° by the hinge, a buffer pad is arranged between the cover plate and the middle frame, and the buffer pad is fixedly connected to the middle frame. The buffer pad prevents the cover plate from colliding with the middle frame during the flipping process, and provides a supporting reaction force for the cover plate when the cover plate remains in the flipped state.

[0010] Furthermore, flanges are provided at the upper and lower edges of the ventilation window, mounting holes are provided on the flanges, sealing rivet nuts are provided at positions corresponding to the mounting holes in the middle frame, and the ventilation window and the middle frame are fixedly connected by screws and sealing rivet nuts. The sealing rivet nuts are installed in the middle frame to provide a mounting interface for the ventilation window, which can prevent air leakage and abnormal noise at the interface position.

[0011] Furthermore, filter cotton is provided between the partition and the ventilation window.

[0012] Furthermore, the folding plates constituting the air path partition are angular and fixedly connected to the ventilation windows in parallel with each other.

[0013] The ventilation device for balancing the air pressure difference at the train end of the present invention can achieve two functional states: sealing and ventilation. When the train is running, the cover is in an open state. When the train encounters air pressure fluctuations, the air can keep flowing freely to balance the pressure, avoid the disturbance of the air pressure fluctuations on the inner windshield, and at the same time do not affect the function of the inner windshield to block the wind, rain, snow, sand and dust of the external environment; when the inner windshield or the train needs to undergo positive and negative pressure airtightness tests, the cover is closed to make the inner windshield completely sealed, ensuring that the inner windshield or the train can undergo positive and negative pressure airtightness tests.

[0014] Figure 1 The present invention is a schematic diagram of installing the ventilation device for balancing the air pressure difference at the train end on the windshield inside the train.

[0015] Figure 2 This is a structural diagram of the ventilation device for balancing the air pressure difference at the vehicle end of a train according to the present invention when the cover is closed.

[0016] Figure 3 This is a structural diagram of the ventilation device for balancing the air pressure difference at the vehicle end of a train according to the present invention, when the cover plate is flipped over.

[0017] Figure 4 This is an exploded view of the ventilation window portion of the ventilation device for balancing the air pressure difference at the train end according to the present invention.

[0018] The markings in the figure are: 1-inner windshield; 2-middle frame; 3-ventilation device for balancing the air pressure difference at the train end; 4-sealing rivet nut; 5-screw; 6-ventilation window; 7-air path partition; 8-filter cotton installation frame; 9-cover plate; 10-folding leaf; 11-buffer pad; 12-partition; 13-sealing cotton; 14-flange; 15-filter cotton. DETAILED DESCRIPTION

[0019] Combine the following Figures 1 to 4 The ventilation device for balancing the air pressure difference at the vehicle end of a train according to the present invention is described in detail.

[0020] like Figure 1 As shown, the ventilation device 3 for balancing the air pressure difference at the train end of the present invention is arranged on the middle frame 2 of the outer bellows of the windshield 1 inside the train, and one is arranged on each of the left and right vertical frames of the middle frame 2.

[0021] like Figures 2 to 4 As shown, the ventilation device for balancing the air pressure difference at the train end of the present invention includes a ventilation window 6, an air path partition 7, a filter cotton installation frame 8, filter cotton 15, a partition plate 12, and a cover plate 9.

[0022] The middle frame 2 is provided with a through opening along the thickness direction, and the shape of the ventilation window 6 matches the opening of the middle frame.

[0023] The ventilation window 6 is fixedly connected to the middle frame 2, and flanges 14 are provided at the upper and lower edges of the ventilation window 6, and mounting holes are provided on the flanges 14. Sealing rivet nuts 4 are provided at positions corresponding to the mounting holes of the middle frame 2, and the ventilation window 6 is fixedly connected to the middle frame 2 through screws 5 and sealing rivet nuts 4. The sealing rivet nuts 4 are installed to the middle frame 2 to provide a mounting interface for the ventilation window 6, which can prevent air leakage and abnormal noise at the interface position.

[0024] The ventilation window 6 is provided with an air path partition 7 fixedly connected thereto along the thickness direction, and the air path partition 7 is composed of a number of right-angled folded plates spaced apart and distributed in parallel with each other; the air path partition reduces the air flow speed under air pressure fluctuations, reduces the noise caused by excessive air flow speed, prevents water backflow, and provides a directional support for the filter cotton to prevent the filter cotton from being deformed due to rapid air flow.

[0025] The ventilation window 6 is fixedly connected to the filter cotton installation frame 8 at one end in the vehicle, and the filter cotton 15 is arranged between the ventilation window 6 and the filter cotton installation frame 8; the filter cotton installation frame 8 is a groove-shaped frame, including side panels located on both sides and an end panel in the middle, and the side panels are sleeved on the outside of the ventilation window 6 on both sides and fixedly connected to the ventilation window 6 by screws; the middle end panel is pressed on the end surface of the filter cotton 15, and is separated by longitudinal beams and cross beams to form a number of connected vents to provide an inlet and outlet for air flow. The filter cotton 15 reduces the air flow speed under air pressure fluctuations, reduces the noise caused by excessive air flow speed, and can filter dust; the filter cotton installation frame 8 provides a directional support for the filter cotton 15 to prevent the filter cotton 15 from falling.

[0026] A partition plate 12 is provided at one end of the ventilation window 6 outside the vehicle. The partition plate 9 is fixedly connected to the middle frame 2 by screws. A plurality of ventilation holes are provided on the partition plate 12 to provide an inlet and outlet for air flow.

[0027] A cover plate 9 covering the ventilation window is provided outside the partition 12, and a sealing cotton 13 is provided between the cover plate 9 and the partition 12. A hinge 10 is provided at one end of the cover plate 9, and the hinge 10 is welded on the cover plate 9, and the hinge 10 is fixedly connected to the middle frame 2 by a rivet; the non-hinged end of the cover plate 9 is fixedly connected to the middle frame 2 by a screw 5, and the non-hinged end of the cover plate is connected to the middle frame by a screw 5 after the cover plate is turned 180° by the hinge.

[0028] After the cover plate 9 is flipped 180° by the hinge 10, a buffer pad 11 is arranged between the cover plate 9 and the middle frame 2, and the buffer pad 11 is fixedly connected to the middle frame 2. The buffer pad 11 prevents the cover plate from colliding with the middle frame during the flipping process, and provides a supporting reaction force for the cover plate when the cover plate remains in the flipped state.

[0029] The ventilation device for balancing the air pressure difference at the train end of the present invention can achieve two functional states: sealing and ventilation. When the train is running, the cover is in an open state. When the train encounters air pressure fluctuations, the air can keep flowing freely to balance the pressure, avoid the disturbance of the air pressure fluctuations on the inner windshield, and at the same time do not affect the function of the inner windshield to block the wind, rain, snow, sand and dust of the external environment; when the inner windshield or the train needs to undergo positive and negative pressure airtightness tests, the cover can be closed to make the inner windshield completely sealed, ensuring that the inner windshield or the train can undergo positive and negative pressure airtightness tests.

[0030] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A ventilation device for balancing the air pressure difference at the end of a train, characterized in that: It comprises a ventilation window connecting the inside and outside of the vehicle, an air path partition fixedly installed in the ventilation window and a flippable cover plate fixedly installed at one end of the ventilation window; the ventilation window is fixedly installed in a through opening of the middle frame of the inner windshield along the thickness direction; the air path partition is composed of folding plates which are spaced apart from each other and form channels with each other, the folding plates are fixedly connected to the ventilation window and are low at both ends and high in the middle along the thickness direction of the ventilation window; a flippable cover plate is provided at one end of the ventilation window, and the cover plate is in a sealed state with the ventilation window before flipping; before and after the cover plate is flipped, the end of the cover plate away from the flipping center axis is detachably fixedly connected to the middle frame respectively.

2. The ventilation device for balancing the air pressure difference at the train end according to claim 1, characterized in that: The cover plate is arranged at one end of the ventilation window outside the vehicle, and a sealing cotton higher than the inner surface of the cover plate is arranged on the inner surface of the cover plate. Before the cover plate is turned over, it is sealed with the ventilation window through the sealing cotton.

3. The ventilation device for balancing the air pressure difference at the train end according to claim 1, characterized in that: A hinge is fixedly provided at one end of the cover plate, and is fixedly connected to the middle frame via the hinge. The non-hinged end of the cover plate is fixedly connected to the middle frame via screws before and after flipping.

4. The ventilation device for balancing the air pressure difference at the train end according to claim 2, characterized in that: A hinge is provided at one end of the cover plate, which is fixedly connected to the middle frame via the hinge, and the non-hinged end of the cover plate is fixedly connected to the middle frame via screws before and after flipping.

5. The ventilation device for balancing the air pressure difference at the vehicle end of a train according to any one of claims 1 to 4, characterized in that: A partition is arranged between the ventilation window and the cover plate, and a plurality of ventilation holes are arranged on the partition.

6. The ventilation device for balancing the air pressure difference at the train end according to claim 5, characterized in that: The ventilation window is fixedly connected to a filter cotton installation frame at one end in the vehicle, a plurality of ventilation holes are arranged on the end surface of the filter cotton installation frame covering the ventilation window, and filter cotton is arranged between the ventilation window and the filter cotton installation frame.

7. The ventilation device for balancing the air pressure difference at the vehicle end of a train according to claim 1, 2, 3, 4 or 6, characterized in that: A buffer pad is arranged between the cover plate and the middle frame after the cover plate is turned over 180 degrees by the hinge, and the buffer pad is fixedly connected to the middle frame.

8. The ventilation device for balancing the air pressure difference at the vehicle end of a train according to claim 1, 2, 3, 4 or 6, characterized in that: The upper and lower edges of the ventilation window are provided with flanges, mounting holes are provided on the flanges, sealing rivet nuts are provided at positions corresponding to the mounting holes in the middle frame, and the ventilation window and the middle frame are fixedly connected by screws and sealing rivet nuts.

9. The ventilation device for balancing the air pressure difference at the train end according to claim 1 or 2 or 3 or 4 or 6, characterized in that Filter cotton is arranged between the partition plate and the ventilation window.

10. The ventilation device for balancing the air pressure difference at the vehicle end of a train according to claim 1, 2, 3, 4 or 6, characterized in that: The folding plates constituting the air path partition are angular and are fixedly connected to the ventilation windows in parallel with each other.

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