Drain seal valve structure suitable for air tight vehicles

Abstract

A drainage sealing valve structure suitable for vehicles with air tightness, characterized in that it comprises a valve body, two independent valve cores in the valve body and valve covers at both ends, each valve cover is connected with a valve core, the valve core is an elastic body with elastic deformation property, which can deform to seal the valve body when the pressure change inside and outside the vehicle is compressed, and can smoothly drain when there is no pressure change inside and outside the vehicle and there is water in the vehicle. The new drainage sealing valve structure has the function of "two-way automatic opening and closing". It can maintain the connection between the inside and outside of the vehicle through the valve when there is no pressure change inside and outside the vehicle, and smoothly drain when there is water in the vehicle. It can also sense the air pressure change inside and outside the vehicle and automatically trigger the valve closure in the corresponding direction when the vehicle is subjected to positive or negative pressure, so as to seal the vehicle, reduce the air pressure change in the vehicle, ensure the comfort of riding, and overcome the problem that the original rail vehicle cannot consider both sealing and drainage.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle body system manufacturing technology, and in particular relates to a vehicle drainage sealing structure. Background Technology

[0002] When a train enters a tunnel at high speed and runs inside, compression waves and expansion waves alternate within the tunnel, causing drastic changes in air pressure. If the train car is not airtight, these pressure changes can cause severe discomfort to passengers, even dizziness and vomiting, affecting their comfort and leading to aerodynamic problems in the train tunnel.

[0003] Currently, rail transit requires vehicles to have a certain level of sealing performance, meaning there should be no leaks between the inside and outside of the vehicle, in order to reduce pressure changes inside the train when entering a tunnel. However, due to structural limitations, drainage holes need to be installed in certain locations on the vehicle to drain rainwater or air conditioning condensate that may enter the vehicle. The placement of these drainage holes conflicts with the vehicle's sealing capabilities; currently, there is no mature structure or component that can both drain water from the vehicle and ensure a certain level of sealing performance. Summary of the Invention

[0004] This invention addresses the conflict between the placement of drainage holes and vehicle sealing in conventional rail vehicles by proposing a new drainage and sealing valve structure. This structure allows for smooth drainage when water is present inside the vehicle, while also sensing changes in air pressure inside and outside the vehicle and automatically triggering the valve in the corresponding direction to close, thus sealing the vehicle, reducing changes in air pressure inside the vehicle, and ensuring passenger comfort.

[0005] To achieve the above-mentioned objectives, this invention provides a drainage sealing valve structure suitable for vehicles with airtightness, characterized in that: it includes a valve body, two independent valve cores inside the valve body, and valve covers at both ends, each valve cover at both ends being connected to a valve core, the valve core being an elastic body with elastic deformation properties, which can deform and seal the valve body when compressed due to pressure changes inside and outside the vehicle, and can smoothly drain water when there are no pressure changes inside and outside the vehicle and water is stored in the vehicle.

[0006] Furthermore, the valve core is a threaded or cylindrical elastomer.

[0007] Furthermore, the valve cover is funnel-shaped.

[0008] Furthermore, a support plate with a drain hole is provided between the two valve cores inside the valve body.

[0009] The novel drainage and sealing valve structure proposed in this invention has a "bidirectional automatic opening and closing" function. It can maintain communication between the inside and outside of the vehicle through the valve when there is no pressure change, allowing for smooth drainage when water is trapped inside. Simultaneously, when the vehicle is subjected to positive or negative pressure, it senses changes in air pressure inside and outside the vehicle and automatically triggers the corresponding valve to close, sealing the vehicle, reducing air pressure fluctuations inside, ensuring passenger comfort, and overcoming the problem of existing rail vehicles being unable to simultaneously achieve sealing and drainage. Attached Figure Description

[0010] Figure 1 A schematic diagram of the natural working state of a drain sealing valve when it is not under pressure.

[0011] Figure 2 A schematic diagram showing the working state of the drain sealing valve under external air pressure.

[0012] Figure 3 This is a schematic diagram showing the working state of the drain sealing valve under the air pressure inside the vehicle.

[0013] The top image shows the inside of the vehicle, and the bottom image shows the outside. Detailed Implementation

[0014] Reference Figure 1 The specific embodiment of this invention includes a valve body 1, an upper elastic valve core 1, an upper valve cover 3, a central support plate 4 with a drain hole 4, a lower elastic valve core 5, and a lower valve cover 6. The valve body is hollow, and the central support plate 4 is located in the middle of the valve body. The drain hole is permeable to water and serves as a support for the upper and lower elastic valve cores to reset. The upper and lower elastic valve cores are installed in the valve body and are threaded elastic bodies with high sensitivity, capable of deformation upon compression. The upper and lower valve covers are funnel-shaped, providing a better sealing effect.

[0015] When the train is stationary or running normally on the track, the pressure inside and outside the vehicle remains balanced. The drain sealing valve is not under pressure inside and outside, and the upper and lower elastic valve cores are in a natural state. The upper and lower valve cores and the upper and lower valve covers are higher than the two ends of the valve body. The upper and lower valve covers are not sealed to the valve body. If rainwater or air conditioning condensate leaks locally inside the vehicle, the water can be discharged outside the vehicle through the threaded gap between the upper elastic valve core 2, the lower elastic valve core 5 and the valve body 1 and the drain hole on the middle support plate 4.

[0016] Reference Figure 2 When the drain sealing valve is subjected to external air pressure, the external air pressure triggers the lower elastic valve core 5 to be compressed, which drives the lower valve cover 6 to press tightly against the valve body 1, thereby achieving a seal at the bottom of the drain sealing valve, reducing pressure changes inside the vehicle, and improving ride comfort.

[0017] Reference Figure 3When air pressure enters the vehicle, the vehicle interior is under negative pressure. When the drain sealing valve is subjected to the air pressure inside the vehicle, the pressure inside the vehicle triggers the upper elastic valve core 1 to be compressed, which drives the upper valve cover 2 to press tightly against the valve body 1, thereby achieving a seal at the top of the drain sealing valve, reducing pressure changes inside the vehicle, and improving passenger comfort.

[0018] The new drain sealing valve structure can maintain the connection between the inside and outside of the vehicle when there is no pressure change, so that water inside the vehicle can be drained smoothly; when the vehicle is subjected to positive or negative pressure, it can automatically sense the change in air pressure inside and outside the vehicle and trigger the valve in the corresponding direction to close, so as to seal the vehicle, reduce the pressure change inside the vehicle, and ensure the comfort of passengers.

Claims

1. A drain seal valve structure suitable for use with an air tight vehicle, characterized by: It includes valve body, two independent valve core in valve body and valve cover at both ends, valve cover at both ends is connected with one valve core respectively, valve core is screw thread elastic body with elastic deformation property, it can deform to seal valve body when vehicle internal and external pressure change is compressed, it can be discharged smoothly when vehicle internal and external pressure change is not and water is stored in vehicle; support plate with drain hole is arranged between two valve cores in valve body, support plate is located in middle part of valve body and is used as support for valve core reset, valve cover is funnel shape.

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