Ventilation device and rail vehicle

Abstract

The ventilation device and the rail vehicle are provided, the ventilation device is installed on the oil tank of the internal combustion engine power or hybrid power rail vehicle, the ventilation device comprises a first pipeline, a second pipeline, a third pipeline and a switching assembly, the first pipeline is installed above the oil tank and communicates with the oil tank, one end of the second pipeline is connected with the other end of the first pipeline, and the other end extends downward along the height direction; one end of the third pipeline is connected with the other end of the first pipeline, and the other end extends upward along the height direction; the switching assembly is installed between the first pipeline, the second pipeline and the third pipeline, is suitable for communicating the first pipeline with the second pipeline in the case that the rail vehicle normally operates, so as to balance the internal and external pressures of the oil tank, and in the case that the rail vehicle accelerates or decelerates, the fuel in the oil tank rising along the first pipeline drives the switching assembly, so that the first pipeline communicates with the third pipeline.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the technical field of rail vehicles, and more particularly, to a ventilation device and a rail vehicle. Background Art

[0002] Diesel locomotives and hybrid electric multiple units (HEMs) are typically powered directly by a diesel engine or by a generator driven by a diesel engine. Both require a sufficiently large fuel tank to sustain long-distance travel.

[0003] Large-capacity fuel tanks are generally equipped with breathers. On the one hand, when the engine consumes fuel, negative pressure (vacuum) is generated inside the fuel tank. Without a breather, the negative pressure may prevent the flow of fuel and make it difficult for the engine to operate normally. By providing a breather, air can be allowed to enter the fuel tank to balance the air pressure inside and outside the tank, thereby ensuring that the fuel can flow smoothly to the engine. On the other hand, if the fuel tank cannot discharge the diesel vapor generated when the engine is running, the positive pressure inside the tank may increase, and there may even be a risk of the fuel tank exploding. By providing a breather, excess diesel vapor can be released, preventing excessive positive pressure from forming inside the fuel tank and ensuring that the positive pressure inside the tank remains at a safe level.

[0004] However, unlike automobiles and other moving machinery, rail vehicles have longer acceleration and braking times. Conventional braking for a rail vehicle typically takes approximately one minute to decelerate from speeds above 200 km / h to a standstill. Prolonged acceleration or deceleration can cause the oil level in the fuel tank to shift, leading to fuel leakage from the breather. Summary of the Invention

[0005] In view of this, the present disclosure provides a ventilation device and a rail vehicle, which can reduce fuel leakage during acceleration and deceleration of the rail vehicle.

[0006] As one aspect of an embodiment of the present disclosure, there is provided a ventilation device installed on a fuel tank of a rail vehicle powered by an internal combustion engine or a hybrid power, wherein the ventilation device includes a first pipe, a second pipe and a third pipe. The first pipe is installed above the fuel tank and is connected to the fuel tank. One end of the second pipe is connected to the other end of the first pipe, and the other end extends downward in the height direction. One end of the third pipe is connected to the other end of the first pipe, and the other end extends upward in the height direction. A switching assembly is installed between the first pipe, the second pipe and the third pipe, and is adapted to connect the first pipe with the second pipe to balance the internal and external pressures of the fuel tank when the rail vehicle is operating normally; and when the rail vehicle is accelerating or decelerating, the fuel in the fuel tank rising along the first pipe shifts the switching assembly to connect the first pipe with the third pipe to reduce leakage of the fuel from the second pipe.

[0007] According to an embodiment of the present disclosure, an installation area is formed between the first pipeline, the second pipeline, and the third pipeline, and the switching assembly includes a connector, a first stopper, and a second stopper. The connector is rotatably installed in the installation area around a rotation axis that is perpendicular to the axial direction of the first pipeline and parallel to the horizontal plane. The first stopper is installed at one end of the connector, and the second stopper is installed at the other end of the connector. In the case of normal operation of the rail vehicle, the switching assembly is in a first state in which the first stopper connects the first pipeline with the second pipeline and the second stopper isolates the first pipeline from the third pipeline; when the rail vehicle accelerates or decelerates, the fuel in the first pipeline drives the first stopper and the second stopper to rotate around the rotation axis, and the switching assembly is in a second state in which the first stopper connects the first pipeline with the third pipeline and the second stopper isolates the first pipeline from the second pipeline.

[0008] According to an embodiment of the present disclosure, a stopper is installed at the top of one end of the second pipe close to the installation area, and the stopper is suitable for blocking the second stopper from further rotating toward the second pipe when the switching assembly is in the first state, and blocking the first stopper from further rotating toward the first pipe when the switching assembly is in the second state.

[0009] According to an embodiment of the present disclosure, an extension portion extending horizontally toward the second pipe is provided on a side of the one end of the first pipe connected to the third pipe, which is away from the second pipe. The extension portion is suitable for contacting the upper surface of the second stopper when the second stopper is in the first state, thereby isolating the third pipe from the first pipe.

[0010] According to an embodiment of the present disclosure, the first weight of the above-mentioned first stop is greater than the second weight of the above-mentioned second stop, so that when the above-mentioned rail vehicle operates normally, the above-mentioned switching assembly remains in the above-mentioned first state based on the weight difference between the above-mentioned first stop and the above-mentioned second stop.

[0011] According to an embodiment of the present disclosure, the first stopper is made of metal, and the second stopper is made of rubber.

[0012] According to an embodiment of the present disclosure, in the above-mentioned first state, a connecting channel is formed between the above-mentioned first stopper and the bottom wall of the above-mentioned first pipe to allow air from the second pipe to pass through the above-mentioned connecting channel and enter the above-mentioned oil tank via the above-mentioned first pipe, so that the internal and external pressures of the above-mentioned oil tank are kept balanced.

[0013] According to an embodiment of the present disclosure, an upwardly extending oil baffle is provided at one end of the second pipeline connected to the first pipeline. The oil baffle is suitable for cooperating with the second pipeline and the second stop member to form an upwardly opening oil storage tank when the second stop member is in the second state, so as to at least partially store the fuel that flows into the horizontal part of the second pipeline due to the rotation of the first stop member.

[0014] According to an embodiment of the present disclosure, one end of the second pipe connected to the first pipe extends upwardly and obliquely in a direction away from the first pipe, so that the fuel stored in the oil storage tank can flow back to the fuel tank when the rail vehicle operates normally.

[0015] As another aspect of the embodiments of the present disclosure, a rail vehicle is provided, comprising a fuel tank and any one of the above-mentioned ventilation devices. The fuel tank is mounted on an underframe of the rail vehicle, and any one of the above-mentioned ventilation devices is mounted on the fuel tank.

[0016] According to the ventilation device of the embodiment of the present disclosure, a third pipe extending upward is provided between the first pipe and the second pipe, and by installing the switching component between the first pipe, the second pipe and the third pipe, when the rail vehicle is operating normally, the first pipe is connected to the second pipe, and the interior of the fuel tank is connected to the external atmosphere, so that pressure balance is achieved and the smooth flow of fuel is ensured; when the rail vehicle accelerates or decelerates, the fuel in the fuel tank that rises along the first pipe generates thrust, and the switching component is switched to connect the first pipe with the third pipe. The fuel flowing from the fuel tank to the first pipe is temporarily stored through the third pipe. Under the premise of ensuring that the second pipe serves as a ventilation pipe, the leakage of fuel from the second pipe is reduced. At the same time, it is ensured to a great extent that the fuel vapor can be discharged from the fuel tank in time, and the fuel vapor is prevented from flowing back into the fuel tank, thereby improving the safety and reliability of the rail vehicle operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0018] Figure 1 A perspective view schematically shows a breather device and a fuel tank according to an embodiment of the present disclosure;

[0019] Figure 2 Schematically shows Figure 1 a side view of the breather and fuel tank shown;

[0020] Figure 3 A perspective view schematically shows the internal structure of a fuel tank according to an embodiment of the present disclosure;

[0021] Figure 4 A partial cross-sectional view schematically shows a ventilation device according to an embodiment of the present disclosure in a first state; and

[0022] Figure 5 A partial cross-sectional view schematically shows a ventilation device in a second state according to an embodiment of the present disclosure.

[0023] The following are the descriptions of the reference numerals:

[0024] 1-First pipeline;

[0025] 2- Second pipeline;

[0026] 21-block;

[0027] 22-Oil baffle;

[0028] 3- The third pipeline;

[0029] 4- Switch components;

[0030] 41-connector;

[0031] 42-first stopper;

[0032] 43- second stopper;

[0033] 5- extension;

[0034] 6-Fuel tank;

[0035] 61- baffle;

[0036] 62-Through hole. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0038] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "includes" and tautological expressions thereof, such as "including," "includes," "include," "contains," "containing," and so forth, mean "comprising."

[0039] All terms used herein including technical and scientific terms have the meanings commonly understood by one of ordinary skill in the art unless otherwise defined. It should be noted that the terms used herein are defined as having a meaning that is consistent with the context of the specification in which the terms are utilized and the terms should not be interpreted in an idealized or overly formal sense.

[0040] In situations where similar terminology is used for similar items, one of ordinary skill in the art would understand the terminology to have a meaning consistent with the context of that specific implementation. For example, "a system having at least one of A, B, or C" should be understood to include, among other things, a system having A alone, a system having B alone, a system having C alone, a system having both A and B, a system having both A and C, a system having both B and C, and / or a system having all of A, B, and C, etc. In situations where similar terminology is used for similar items, one of ordinary skill in the art would understand the terminology to have a meaning consistent with the context of that specific implementation. For example, "a system having at least one of A, B, or C" should be understood to include, among other things, a system having A alone, a system having B alone, a system having C alone, a system having both A and B, a system having both A and C, a system having both B and C, and / or a system having all of A, B, and C, etc.

[0041] It should also be noted that the directional phrases mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", etc., are only the directions of the drawings and are not intended to limit the scope of protection of the disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. When the conventional structure or configuration may cause confusion to the understanding of the disclosure, it will be omitted.

[0042] It is found in the process of implementing the disclosure that, for the sake of safety and practicality, the end of the ventilation pipe in communication with the atmosphere in the ventilation device needs to be extended downward, that is, vertically to the ground. In this way, it can be ensured that the ventilation pipe effectively maintains the pressure inside the oil tank within a safe range, preventing safety hazards caused by excessive pressure difference between the inside and outside of the oil tank, and helping to balance the pressure inside and outside the oil tank, avoiding safety problems such as oil tank expansion or rupture caused by excessive pressure.

[0043] In addition, the change of the pressure inside the oil tank may affect the normal supply of fuel, especially during the operation of the locomotive. Through the design of the ventilation pipe vertically to the ground, the pressure inside the oil tank can be effectively adjusted to ensure stable supply of fuel when needed, thereby ensuring the normal operation of the locomotive.

[0044] Furthermore, the vertical ground design of the ventilation duct can alleviate the uneven pressure distribution inside and outside the fuel tank during the stable operation of the train. This design also takes into account the vibration and impact that the train may encounter during operation. Through reasonable layout design, the air flow in the fuel tank can be organized and flow smoothly, reducing the adverse effects of vibration and impact on the flow of oil in the tank.

[0045] Furthermore, the vertical ground-level ventilation duct design makes maintenance and inspection easier because it is more accessible, reducing the difficulty and time of maintenance. At the same time, this design also helps to promptly identify and address potential safety hazards, further improving the safety of locomotive operation.

[0046] Therefore, the design of the ventilation pipe of the rail vehicle fuel tank vertically to the ground is to ensure the safe operation of the oil system. By balancing the pressure inside and outside the fuel tank, safety problems caused by excessive pressure differences are prevented. The air flow organization in the fuel tank is smoother, which is also conducive to the stable supply of fuel and the convenience of maintenance.

[0047] Furthermore, during rail vehicle operation, air flow creates a certain amount of airflow along the sides of the vehicle. If the ventilation device is installed across the width of the vehicle, it may be more susceptible to airflow, causing impurities and moisture to be drawn into the fuel tank. Installing it at one end of the vehicle's length can better avoid these problems.

[0048] However, the ventilation device is arranged at one end of the rail vehicle in the longitudinal direction. When the rail vehicle accelerates or decelerates for a long time (about one minute), the fuel in the fuel tank is likely to leak through the ventilation pipe vertical to the ground.

[0049] In addition, since fuel may evaporate slowly at room temperature and generate fuel vapor in the fuel tank, if the ventilation pipe is raised, the fuel vapor may not be discharged in time, resulting in fuel dilution and affecting engine performance.

[0050] Figure 1 Schematically shows a perspective view of a breather device and a fuel tank according to an embodiment of the present disclosure, Figure 2 Schematically shows Figure 1 Side view of the breather and fuel tank shown.

[0051] As one aspect of the embodiments of the present disclosure, a ventilation device is provided, such as Figure 1 and Figure 2As shown, the ventilation device is installed on the fuel tank 6 of a rail vehicle powered by an internal combustion engine or a hybrid power. The ventilation device includes a first pipe 1, a second pipe 2, a third pipe 3 and a switching assembly 4. The first pipe 1 is installed above the fuel tank 6 and is connected to the fuel tank 6. One end of the second pipe 2 is connected to the other end of the first pipe 1, and the other end extends downward in the height direction. One end of the third pipe 3 is connected to the other end of the first pipe 1, and the other end extends upward in the height direction. The switching assembly 4 is installed between the first pipe 1, the second pipe 2 and the third pipe 3, and is suitable for connecting the first pipe 1 with the second pipe 2 when the rail vehicle is operating normally to balance the internal and external pressures of the fuel tank 6; and when the rail vehicle accelerates or decelerates, the fuel in the fuel tank 6 that rises along the first pipe 1 toggles the switching assembly 4 to connect the first pipe 1 with the third pipe 3 to reduce fuel leakage from the second pipe 2.

[0052] According to the ventilation device of the embodiment of the present disclosure, an upwardly extending third pipe 3 is provided between the first pipe 1 and the second pipe 2. By installing the switching component 4 between the first pipe 1, the second pipe 2 and the third pipe 3, when the rail vehicle is operating normally, the first pipe 1 is connected to the second pipe 2, and the interior of the fuel tank 6 is connected to the outside atmosphere, so that pressure balance is achieved and the smooth flow of fuel is ensured; when the rail vehicle accelerates or decelerates, the fuel in the fuel tank 6 that rises along the first pipe 1 generates thrust, and the switching component 4 is switched to connect the first pipe 1 with the third pipe 3. The fuel flowing from the fuel tank 6 to the first pipe 1 is temporarily stored through the third pipe 3. On the premise of ensuring that the second pipe 2 serves as a ventilation pipe, the leakage of fuel from the second pipe 2 is reduced. At the same time, it is ensured to a great extent that the fuel vapor can be discharged from the fuel tank in time, and the fuel vapor is prevented from flowing back into the fuel tank, thereby improving the safety and reliability of the rail vehicle operation.

[0053] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the upper end of the third pipe 3 may further form a first extension pipe parallel to the top surface of the oil tank 6 and extending in the longitudinal direction of the rail vehicle to prevent impurities and water vapor from being affected by the airflow and being drawn into the oil tank 6. Furthermore, the other end of the first extension pipe, opposite to the third pipe 3, may further form a second extension pipe extending downward to further prevent impurities and water vapor from being affected by the airflow and being drawn into the oil tank 6.

[0054] In an illustrative embodiment, Figure 1 and Figure 2 As shown, the first pipeline 1 includes a first section of the first pipeline 1 extending upward from the oil tank 6 and a second section of the first pipeline 1 extending from the first section of the first pipeline 1 in a direction parallel to the top surface of the oil tank 6 .

[0055] In an illustrative embodiment, Figure 1and Figure 2 As shown, the second pipeline 2 includes a first section of the second pipeline 2 extending from the first pipeline 1 and a second section of the second pipeline 2 extending downward from the first section of the second pipeline 2. One end of the second section of the second pipeline 2 is connected to the atmosphere.

[0056] According to the embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the ventilation device is installed on the fuel tank 6 and is located at one end in the length direction of the rail vehicle to prevent impurities and water vapor from being sucked into the fuel tank 6 due to the influence of airflow, thereby ensuring the cleanliness and stability of the fuel in the fuel tank 6.

[0057] Figure 3 A perspective view schematically shows the internal structure of a fuel tank according to an embodiment of the present disclosure.

[0058] According to the embodiments of the present disclosure, Figure 3 As shown, a plurality of baffles 61 are arranged in the width direction and the length direction of the rail vehicle in the fuel tank 6. A plurality of through holes 62 are provided on the baffles 61. The baffles 61 limit the flow of fuel in the fuel tank 6 to reduce the surge of fuel during the acceleration or deceleration of the rail vehicle.

[0059] In such an embodiment, the baffle 61 can also disperse the pressure of the fuel during its flow, reduce the pressure fluctuation on the inner wall of the fuel tank 6 , and extend the service life of the fuel tank 6 .

[0060] Figure 4 Schematically shows a partial cross-sectional view of a ventilation device according to an embodiment of the present disclosure in a first state, Figure 5 A partial cross-sectional view schematically shows a ventilation device in a second state according to an embodiment of the present disclosure.

[0061] According to an embodiment of the present disclosure, an installation area is formed between the first pipe 1, the second pipe 2 and the third pipe 3, and the switching assembly 4 includes a connector 41, a first stopper 42 and a second stopper 43. The connector 41 is rotatably installed in the installation area around a rotation axis that is perpendicular to the axial direction of the first pipe 1 and parallel to the horizontal plane. The first stopper 42 is installed at one end of the connector 41, and the second stopper 43 is installed at the other end of the connector 41. In the case of normal operation of the rail vehicle, as shown in FIG. Figure 4 As shown, the switching assembly 4 is in a first state where the first stopper 42 connects the first pipe 1 with the second pipe 2 and the second stopper 43 isolates the first pipe 1 from the third pipe 3; when the rail vehicle accelerates or decelerates, as shown in FIG. Figure 5As shown, the fuel in the first pipeline 1 drives the first stopper 42 and the second stopper 43 to rotate around the rotation axis, and the switching assembly 4 is in a second state in which the first stopper 42 connects the first pipeline 1 with the third pipeline 3 and the second stopper 43 isolates the first pipeline 1 from the second pipeline 2.

[0062] According to the embodiments of the present disclosure, by installing first and second stoppers 42 and 43 at both ends of connector 41, leveraging the principle of leverage, the first and second positions can be flexibly switched to accommodate the various operating states of the rail vehicle (normal operation, acceleration, and deceleration). The rotation of first and second stoppers 42 and 43 precisely controls the direction of fuel flow, minimizing fuel leakage.

[0063] In such an embodiment, during the acceleration or deceleration of the rail vehicle, the fuel flowing into the first pipe 1 pushes the first stopper 42, connecting the first pipe 1 with the third pipe 3, and guiding the fuel to the third pipe 3, thereby preventing the fuel from leaking from the second pipe 2, thereby improving the safety of the rail vehicle operation.

[0064] In an exemplary embodiment, the first pipe 1, the second pipe 2, and the third pipe 3 are connected via a three-way pipe, the installation area is located within the three-way pipe, and the switching assembly 4 is installed within the three-way pipe. This facilitates replacement and maintenance of the switching assembly 4.

[0065] In an illustrative embodiment, the first stopper 42 may be integrally formed with the connecting member 41 , or may be installed on the first end of the connecting member 41 by welding, riveting, screwing, or other installation methods.

[0066] In an exemplary embodiment, the connecting member 41 is symmetrical about the rotation axis.

[0067] In an illustrative embodiment, Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the cross-sections of the first pipe 1, the second pipe 2 and the third pipe 3 are circular, the inner diameters of the third pipe 3 and the second pipe 2 are equal, the rotation axis is perpendicular to and intersects with the axis of the second pipe 2, and the connecting piece 41 is symmetrical about the rotation axis.

[0068] In an exemplary embodiment, when the switching component 4 is in Figure 4In the first state shown, the first stopper 42 extends perpendicular to the axis of the first pipe 1, and the second stopper 43 extends parallel to the axis of the first pipe 1. The shape of the connecting member 41 matches the shape of the second pipe 2, the shape of the end of the first stopper 42 facing the second pipe 2 matches the shape of the second pipe 2, and the shape of the end of the second stopper 43 facing the second pipe 2 matches the shape of the second pipe 2. In this way, in the first state, the first pipe 1 and the second pipe 2 can be connected, while the first pipe 1 is isolated from the third pipe 3. In the second state, the first pipe 1 and the third pipe 3 can be connected, while the first pipe 1 is isolated from the second pipe 2.

[0069] In such an embodiment, the cross-sections of the first stopper 42 and the second stopper 43 in a direction perpendicular to the axis of the first pipe may be substantially fan-shaped.

[0070] In another exemplary embodiment, the cross-sections of the first pipe 1, the second pipe 2, and the third pipe 3 may also be rectangular or square. In such an embodiment, the connector 41 may be asymmetrical about the rotation axis, and in the second state, the angle between the second stopper 43 and the bottom surface of the second pipe may be an acute angle.

[0071] According to an embodiment of the present disclosure, the ventilation assembly further includes a rotating shaft, which passes through the connector 41 and is installed on the wall of the second pipe 2 located in the installation area, so that the connector 41 can rotate relative to the second pipe 2.

[0072] In an alternative embodiment, there may be two rotating shafts, both of which have axes of rotation, and are located at both ends of the connector 41 adjacent to the wall of the second pipe 2. One end of the rotating shaft extends into the connector 41, and the other end extends into the wall of the second pipe 2.

[0073] According to an embodiment of the present disclosure, the connector 41 can rotate relative to the rotating shaft, and the rotating shaft can be stationary relative to the second pipe 2. Alternatively, the connector 41 can be stationary relative to the rotating shaft, and the rotating shaft rotates with the connector 41.

[0074] According to an embodiment of the present disclosure, the first weight of the first stop 42 is greater than the second weight of the second stop 43, so that when the rail vehicle operates normally, the switching assembly 4 remains in the first state based on the weight difference between the first stop 42 and the second stop 43.

[0075] According to an embodiment of the present disclosure, when the switching assembly 4 is in the second state, the switching assembly 4 is maintained in the second state due to the action of the fuel. When the fuel flows back into the fuel tank 6 through the first pipe 1, the switching assembly 4 returns to the first state based on the weight difference between the first stop member 42 and the second stop member 43.

[0076] According to an embodiment of the present disclosure, the first stopper 42 is made of metal (eg, iron or stainless steel), and the second stopper 43 is made of hard rubber (eg, silicone rubber or nitrile rubber).

[0077] According to an embodiment of the present disclosure, in the first state, a connecting passage is formed between the first stopper 42 and the bottom wall of the first pipe 1 to allow air from the second pipe 2 to pass through the connecting passage and enter the fuel tank 6 via the first pipe 1, so that the internal and external pressures of the fuel tank 6 are balanced, thereby ensuring the normal flow of fuel.

[0078] According to an embodiment of the present disclosure, a stopper 21 is installed at the top of one end of the second pipe 2 near the installation area. The stopper 21 is suitable for blocking the second stopper 43 from further rotating toward the second pipe 2 when the switching component 4 is in the first state, and blocking the first stopper 42 from further rotating toward the first pipe 1 when the switching component 4 is in the second state, thereby ensuring that the switching component 4 can accurately control the direction of fuel flow, reduce fuel leakage, improve the reliability and safety of the switching device, and extend the service life of the switching component 4.

[0079] In another alternative embodiment, the stopper 21 may also be installed on the side wall of the third pipe 3 intersecting with the second pipe 2 .

[0080] According to an embodiment of the present disclosure, an extension portion 5 extending horizontally toward the second pipe 2 is provided on a side of one end of the first pipe 1 connected to the third pipe 3, which is away from the second pipe 2. The extension portion 5 is suitable for contacting the upper surface of the second stop member 43 when the second stop member 43 is in the first state, thereby isolating the third pipe 3 from the first pipe 1.

[0081] According to an embodiment of the present disclosure, by providing an extension portion 5, the third pipe 3 and the first pipe 1 can be effectively isolated during normal operation of the rail vehicle, and the second pipe 2 can be used as a ventilation pipe to improve the reliability and safety of the ventilation device and enhance the sealing performance.

[0082] According to an embodiment of the present disclosure, an upwardly extending oil baffle 22 is provided at one end of the second pipe 2 connected to the first pipe 1. The oil baffle 22 is suitable for cooperating with the second pipe 2 and the second stop member 43 to form an upwardly opening oil storage tank when the second stop member 43 is in the second state, so as to at least partially store the fuel that flows to the horizontal part of the second pipe 2 due to the rotation of the first stop member 42.

[0083] According to an embodiment of the present disclosure, one end of the second pipe 2 connected to the first pipe 1 extends upwardly and obliquely in a direction away from the first pipe 1, so that the fuel stored in the oil storage tank can flow back to the fuel tank 6 when the rail vehicle operates normally.

[0084] According to the embodiment of the present disclosure, when fuel flows into the first conduit 1 due to acceleration or deceleration of the rail vehicle, a portion of the fuel rotated by the first stopper 42 flows into the second conduit 2 and is blocked by the oil baffle 22. When the second stopper 43 rotates to the second position, the second stopper 43 cooperates with the second conduit 2 and the second stopper 43 to form an upwardly opening oil reservoir, temporarily storing the portion of fuel blocked by the oil baffle 22 and preventing it from leaking from the second conduit 2. Furthermore, during normal operation of the rail vehicle, the fuel in the third conduit 3 flows back to the fuel tank 6 due to gravity. The first and second stoppers 42 and 43 return to the first position due to the weight difference. The portion of fuel blocked by the oil baffle 22 flows back to the fuel tank 6 through the tilted second conduit 2, preventing fuel leakage outside the vehicle body and maintaining a clean environment for the train and track.

[0085] As another aspect of the embodiments of the present disclosure, a rail vehicle is provided, comprising a fuel tank 6 and any one of the above-mentioned ventilation devices. The fuel tank 6 is mounted on a chassis of the rail vehicle, and the ventilation device is mounted on the fuel tank 6.

[0086] According to the ventilation device of the disclosed embodiment, a third pipe 3 extending upward is provided between the first pipe 1 and the second pipe 2, and a switching assembly 4 is provided in the installation area located between the first pipe 1, the second pipe 2, and the third pipe 3. The switching between the first state and the second state is achieved by the thrust of the fuel and the weight difference between the first stopper 42 and the second stopper 43. This achieves a balance of atmospheric pressure inside and outside the fuel tank 6 while effectively preventing oil leakage during braking or acceleration, thereby improving the operational safety of the rail vehicle. The switching assembly 4 is easy to install and replace. Furthermore, the ventilation device does not change other mounting and fixing structures of the rail vehicle and does not affect other mechanical properties of the rail vehicle fuel tank 6.

[0087] The embodiments of the present disclosure are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A ventilation device, characterized in that: Installed on the fuel tank of a rail vehicle powered by an internal combustion engine or a hybrid power, the ventilation device includes: a first pipe, installed above the oil tank and connected to the oil tank; a second pipe, one end of which is connected to the other end of the first pipe and the other end of which extends downward in the height direction; a third pipe, one end of which is connected to the other end of the first pipe and the other end of which extends upward in the height direction; and A switching assembly is installed in an installation area formed between the first pipeline, the second pipeline, and the third pipeline, and is adapted to connect the first pipeline with the second pipeline to balance the internal and external pressures of the fuel tank when the rail vehicle is operating normally; and when the rail vehicle is accelerating or decelerating, the fuel in the fuel tank rising along the first pipeline switches the switching assembly to connect the first pipeline with the third pipeline to reduce leakage of the fuel from the second pipeline. The switching assembly includes: a connecting member rotatably mounted in the mounting area around a rotation axis perpendicular to the axial direction of the first pipe and parallel to a horizontal plane; a first stopper mounted at one end of the connecting member; and a second stopper, mounted on the other end of the connecting member; Wherein, when the rail vehicle operates normally, the switching assembly is in a first state in which the first stop connects the first pipeline with the second pipeline and the second stop isolates the first pipeline from the third pipeline; when the rail vehicle accelerates or decelerates, the fuel in the first pipeline drives the first stop and the second stop to rotate around the rotation axis, and the switching assembly is in a second state in which the first stop connects the first pipeline with the third pipeline and the second stop isolates the first pipeline from the second pipeline.

2. The ventilation device according to claim 1, characterized in that A stopper is installed at the top of one end of the second pipe near the installation area, and the stopper is suitable for preventing the second stopper from rotating further toward the second pipe when the switching assembly is in the first state, and preventing the first stopper from rotating further toward the first pipe when the switching assembly is in the second state.

3. The ventilation device according to claim 2, characterized in that At the end where the first pipe is connected to the third pipe, an extension portion extending horizontally toward the second pipe is provided on a side away from the second pipe, and the extension portion is adapted to contact the upper surface of the second stopper when the second stopper is in the first state, thereby isolating the third pipe from the first pipe.

4. The ventilation device according to any one of claims 1 to 3, characterized in that The first weight of the first stopper is greater than the second weight of the second stopper, so that the switching assembly is maintained in the first state based on the weight difference between the first stopper and the second stopper when the rail vehicle operates normally.

5. The ventilation device according to claim 4, characterized in that The first stopper is made of metal, and the second stopper is made of rubber.

6. The ventilation device according to any one of claims 1 to 3, characterized in that In the first state, a communication channel is formed between the first stopper and the bottom wall of the first pipe to allow air from the second pipe to pass through the communication channel and enter the oil tank via the first pipe, so that the internal and external pressures of the oil tank are balanced.

7. The ventilation device according to any one of claims 1 to 3, characterized in that An upwardly extending oil baffle is provided at one end of the second pipeline connected to the first pipeline. The oil baffle is suitable for cooperating with the second pipeline and the second stop member to form an upwardly opening oil storage tank when the second stop member is in the second state, so as to at least partially store the fuel that flows into the horizontal part of the second pipeline by rotating the first stop member.

8. The ventilation device according to claim 7, characterized in that One end of the second pipe connected to the first pipe extends upwardly and obliquely in a direction away from the first pipe, so that the fuel stored in the oil storage tank can flow back to the fuel tank when the rail vehicle operates normally.

9. A rail vehicle, characterized in that: include: a fuel tank mounted on the underframe of the rail vehicle; The breather device according to any one of claims 1 to 8, mounted on the fuel tank.

Images