Snow prevention device for railway vehicles and their bogies

Abstract

The present invention discloses a railway vehicle and its bogie bogie snow prevention device, which includes at least one guide duct (1), the flow direction of air in all of the guide ducts being opposite to the direction of vehicle travel, each guide duct including a first duct (11) and at least one second duct (12), each second duct intersecting and communicating with one end of the first duct, the first duct guiding the air flow to flow over the bogie bogie along the upper surface of the bogie bogie (2), the first duct having at least one air outlet (111) provided therein, each air outlet blowing air onto the bogie bogie from top to bottom to melt ice and snow accumulated on the bogie bogie, and each second duct guiding the air flow to flow from the end of the bogie bogie to its bottom, thereby preventing snow from flowing into the bogie bogie. To provide a method for preventing airflow from flowing into a bogie truck in heavy snow weather, melting ice and snow piled up on the bogie truck, and cooling and lowering the temperature of the bogie truck in hot weather, thereby reducing adverse factors that threaten the safe running of a railway vehicle and improving the safety of the running of the railway vehicle.

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application filed with the China Patent Office on August 8, 2023, bearing application number 2023109901680 and entitled "Railway vehicle and its bogie snow prevention device," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the technical field of rail transport, and more particularly to a snow prevention device for a rail vehicle and its bogie. [Background technology]

[0003] Bogies are an important component of the running system of railway vehicles, and snow accumulation and icing on bogies in cold, icy, and snowy environments, as well as temperature increases in heat-generating components such as brake calipers and traction motors, are major factors affecting the safe running of railway vehicles.

[0004] When traveling in heavy snow in cold regions, the spoilers in the bogie area cause snow to be drawn in and pile up on the bogie. The heating elements in the bogie, such as the motor, gearbox, and disc brakes, melt the snow into water and then turn it into ice. This process repeatedly leads to large ice formations on the bogie, which alters the bogie's dynamic characteristics, impairs the railcar's ability to negotiate curves, and reduces the operational stability of the railcar's braking system. To prevent snow accumulation from threatening the safe operation of railcars, snow removal and de-icing are one of the main tasks in winter operation and maintenance of railcars. Furthermore, when traveling in hot weather, high temperatures cause the metal parts in the bogie to expand, narrowing the gaps between them and altering the lubricating oil, weakening its performance, resulting in severe friction and wear between the metal parts. To prevent high temperatures from threatening the safe operation of railcars, temperature control of heating elements is one of the main criteria for bogie design. Therefore, when designing a railroad vehicle running system, the main considerations are to reduce snow and ice accumulation on the bogies and to improve the heat dissipation efficiency of heat-generating components.

[0005] Conventional bogies are each provided with a snow prevention device at each end. The snow prevention device is generally mechanical, with an inclined guide surface that guides airflow away from the bogie, preventing the airflow from flowing onto the bogie and reducing the amount of snow that enters the bogie, thereby achieving the purpose of snow prevention. However, due to limitations in the conventional technology, a small amount of snow still enters the bogie, and conventional snow prevention devices are unable to dissipate heat from the bogie when traveling at high temperatures, which still poses a threat to traveling safety. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to provide a railway vehicle and a snow accumulation prevention device for its bogie bogie that can prevent airflow from flowing into the bogie bogie in heavy snow weather, melt ice and snow piled up on the bogie bogie, and cool and lower the temperature of the bogie bogie in hot weather, thereby effectively reducing adverse factors that threaten the safe running of the railway vehicle and improving the safety of the running of the railway vehicle. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a snow accumulation prevention device for bogie bogies of a railway vehicle, which includes at least one guide duct, the flow direction of air in all of the guide ducts being opposite to the direction of vehicle body travel, each guide duct including a first duct and at least one second duct, each second duct crossing and communicating with one end of the first duct, the first duct guiding the air flow to flow along the top surface of the bogie bogie and over the bogie bogie, the first duct having at least one air outlet, each air outlet blowing air onto the bogie bogie from top to bottom to melt ice and snow accumulated on the bogie bogie, and each second duct guiding the air flow to flow from the end of the bogie bogie to its bottom, thereby preventing snow from flowing into the bogie bogie.

[0008] Preferably, the width of the second duct gradually decreases in a direction approaching the bottom of the bogie.

[0009] Preferably, the first duct and / or the second duct is provided with a heating device for heating the air flow.

[0010] Preferably, a temperature detection member for detecting a current ambient temperature; a control device coupled to the temperature sensing element and the heating device, respectively; When the temperature detecting element detects that the current environmental temperature is higher than a predetermined temperature, the control device controls the heating device to stop heating based on the signal transmitted from the temperature detecting element; When the temperature detecting member detects that the current environmental temperature is lower than the set temperature, the control device controls the heating device to start heating based on the signal sent from the temperature detecting member.

[0011] Preferably, a heat insulating layer is provided outside the guide duct.

[0012] Preferably, each nozzle is aligned with a wheel of a bogie.

[0013] Preferably, each of the second ducts has an outlet provided with a valve.

[0014] Preferably, the vehicle further includes a base fixedly disposed above the bogie, all of the guide ducts being provided within the base, and at least one press air intake port being provided on a side wall of the base, each press air intake port communicating with one end of all of the guide ducts, and the press air intake port guides air flowing around the car body so that it flows into the guide duct to which it is connected.

[0015] Preferably, the width of the press inlet gradually increases in the direction approaching the guide duct.

[0016] The present invention further provides a railway vehicle, including the bogie snow prevention device according to any one of the above aspects. [Effects of the Invention]

[0017] In contrast to the background art, the present invention provides a snow prevention device for bogie trucks of railway vehicles, which includes at least one guide duct, each guide duct including a first duct and at least one second duct, each second duct intersecting and communicating with one end of the first duct, and the first duct is provided with at least one air outlet.

[0018] When a railway vehicle is traveling in cold and snowy weather, the car body causes the surrounding air to flow, and the air flow direction in all the guide ducts is opposite to the direction of travel of the car body, so the high-speed air flow naturally flows into each guide duct. Within each guide duct, the air flow is divided into two paths. One path flows along the first duct from the top of the bogie to the bogie, and then through the various air outlets it is blown onto the bogie from top to bottom, melting the ice and snow accumulated on the bogie and preventing large pieces of ice from forming on the bogie, thereby preventing snow from accumulating. The other path flows along the second duct from the end of the bogie to its bottom, preventing snow from entering the bogie and ensuring that it flows onto the rail or ground at the bottom of the bogie. By changing the flow direction of the snow, the amount of snow flowing onto the bogie is reduced, thereby achieving the purpose of preventing snow from accumulating.

[0019] When a railway vehicle is running in hot weather, the air flowing around the vehicle body still flows into each guide duct spontaneously, and the air flow in each guide duct can blow away the hot air piled up on the top surface of the bogie along the first duct, and also blow the hot air at the end of the bogie to the bottom of the bogie along the second duct, thereby realizing cooling and temperature reduction inside the bogie through natural air cooling.

[0020] Therefore, the snow accumulation prevention device for railway vehicle bogies provided by the present invention prevents airflow from flowing into the bogies in heavy snow weather, melts ice and snow accumulated on the bogies, and can cool and lower the temperature of the bogies in hot weather, effectively reducing adverse factors that threaten the safe operation of railway vehicles and improving the safety of railway vehicle operation.

[0021] The railway vehicle provided by the present invention includes the above-mentioned bogie snow prevention device, and therefore has the same beneficial effects.

[0022] In order to more clearly explain the technical solutions of the embodiments of the present invention or the prior art, the following briefly introduces the drawings necessary for the description of the embodiments or the prior art. The drawings described below are only embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without making any efforts that amount to inventive step. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a structural diagram of a railway vehicle bogie snow prevention device provided by a specific embodiment of the present invention; [Figure 2] FIG. 2 is a cross-sectional view of FIG. 1. [Figure 3] 1 is a diagram showing a state in which the snow prevention device for bogies of a railway vehicle provided in a specific embodiment of the present invention prevents snow accumulation when traveling in heavy snow. [Figure 4] 3 is a diagram showing the air-cooled temperature drop state of the railway vehicle bogie snow prevention device provided by a specific embodiment of the present invention when traveling in hot weather. [Figure 5] FIG. 5 is a locally enlarged view of a portion I in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following clearly and completely describes the technical solutions of the embodiments of the present invention, combined with the drawings of the embodiments of the present invention, and the described embodiments are only some of the embodiments of the present invention, not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without any inventive effort fall within the scope of protection of the present invention.

[0025] In order to make those skilled in the art better understand the solutions of the present invention, the present invention will be further described in detail hereinafter in combination with drawings and specific embodiments.

[0026] An embodiment of the present invention discloses a snow accumulation prevention device for a bogie bogie of a railway vehicle, which includes at least one guide duct 1, all of which are arranged in parallel, and each guide duct 1 guides airflow from outside the vehicle body into the bogie bogie 2, as shown in Figures 1 to 5.

[0027] Each guide duct 1 includes a first duct 11 and at least one second duct 12, and each second duct 12 crosses and communicates with one end of the first duct 11, so that the air flowing into the guide duct 1 is divided into two paths, one flowing along the first duct 11 and the other flowing along the second duct 12. Considering that a railway train runs in both directions, one second duct 12 is provided at each end of the first duct 11, and the air flow flows into only one of the second ducts 12 during the running process of the railway train.

[0028] The first duct 11 is a duct of uniform cross section and is provided above the bogie 2, guiding the airflow so that it flows over the bogie 2 along the upper surface of the bogie 2. The first duct 11 is provided with at least one air outlet 111, and each air outlet 111 blows air onto the bogie 2 from top to bottom, melting ice and snow accumulated on the bogie 2 and causing the melted water to flow to the bottom of the bogie 2. All the air outlets 111 are uniformly arranged along the length of the bogie 2, ensuring that ice and snow accumulated on the bogie 2 are sufficiently removed. Of course, the positions of the air outlets 111 may be appropriately set depending on the snow and ice accumulation area of ​​the bogie 2.

[0029] Each second duct 12 guides the air flow from the end of the bogie 2 to its bottom, preventing the snow from flowing downwards into the bogie 2, and changes the flow direction of the snow, causing the snow to flow onto the rail or ground at the bottom of the bogie 2, reducing the amount of snow flowing into the bogie 2 and achieving the effect of preventing snow accumulation.

[0030] As shown in FIG. 3, when a railway vehicle is running in heavy snow in a cold region, the vehicle body causes the surrounding air flow, and the flow direction of the air flow in all guide ducts 1 is opposite to the running direction of the vehicle body, so the high-speed flowing air flow spontaneously flows into each guide duct 1, and in each guide duct 1, the air flow is divided into two paths, one of which flows along the first duct 11 from the top surface of the bogie 2 to the bogie 2, and then flows from top to bottom through each blower 111 to the bogie 2. The air is blown out from the first duct 12 to melt the ice and snow piled up on the bogie 2, preventing large pieces of ice from forming on the bogie 2 and preventing snow from accumulating, while the other flows along the second duct 12 from the end of the bogie 2 to its bottom, preventing the snow from flowing into the bogie 2 and ensuring that the snow flows to the rail or ground at the bottom of the bogie 2, thereby changing the flow direction of the snow and reducing the amount of snow flowing into the bogie 2, thereby achieving the purpose of preventing snow from accumulating.

[0031] As shown in Figure 4, when a railway vehicle is running in hot weather, the air flowing around the car body still flows spontaneously into each guide duct 1, and the air flow in each guide duct 1 can blow away the hot air piled up on the top surface of the bogie 2 along the first duct 11, and also blow the hot air at the end of the bogie 2 to the bottom of the bogie 2 along the second duct 12, thereby cooling and lowering the temperature inside the bogie 2 by natural air cooling. Of course, the air flow can also flow only along the first duct 11 to cool and lower the temperature locally on the bogie 2.

[0032] As described above, the snow accumulation prevention device for railway vehicle bogies provided by the present invention prevents airflow from flowing into the bogie bogie 2 in heavy snow weather, melts ice and snow accumulated on the bogie bogie 2, and can cool and lower the temperature of the bogie bogie 2 in hot weather, effectively reducing unfavorable factors that threaten the safe operation of railway vehicles and improving the safety of railway vehicle operation.

[0033] In addition, the guide duct 1 consisting of the first duct 11 and the second duct 12 is easy to process, manufacture and maintain, and can significantly reduce the amount of snow that accumulates on the bogie bogie 2, provided that the structure and performance of the bogie bogie are not changed. This is suitable for railway vehicles and bogie bogie structures of different speed levels, and the higher the running speed of the vehicle body, the better the snow removal and heat dissipation effects.

[0034] The second duct 12 is a contracting type variable cross-section duct, and the width of the second duct 12 gradually decreases in the direction approaching the bottom of the bogie 2. The second duct 12 continuously contracts its duct cross-section, thereby improving the wind speed at the exhaust port of the second duct 12 and ensuring that the air flow ejected from the second duct 12 has sufficient pressure to prevent snow from entering the bogie 2.

[0035] The first duct 11 and / or the second duct 12 are provided with a heating device for heating the airflow, which accelerates the melting of ice and snow and improves snow accumulation prevention performance. The heating device may specifically be, but is not limited to, a resistance wire. To further optimize the above technical solution, based on the above embodiment, preferably, a heating device is provided in the first duct 11 to sufficiently melt the ice and snow accumulated on the bogie 2.

[0036] The snow prevention device for a bogie truck of a railway vehicle further includes a temperature detecting element and a control device, the temperature detecting element detects the current ambient temperature and may be, but is not limited to, a temperature sensor, and the control device is connected to the temperature detecting element and the heating device, respectively.

[0037] When the railway vehicle is running in hot weather, if the temperature detecting element detects that the current ambient temperature is higher than the predetermined temperature, the control device receives the signal sent from the temperature detecting element and sends the signal to the heating device to control the heating device to stop heating, so that the heating device realizes automatic stopping of heating. That is, when the guide duct 1 is radiating heat, the heating device is not operating, and the first duct 11 and the second duct 12 are mainly used for ventilation.

[0038] When the railway vehicle is traveling in a cold region with heavy snow, if the temperature detecting element detects that the current ambient temperature is lower than the set temperature, the control device receives the signal sent from the temperature detecting element and sends the signal to the heating device to control the heating device to start heating, so that the heating device realizes automatic heating. The predetermined temperature and the set temperature in the specification may both be preset and stored in the control device.

[0039] Here, the control device should include a signal receiving unit, a signal determining unit, and a signal transmitting unit. The signal receiving unit receives an electrical signal transmitted from the temperature detecting element. The signal determining unit is electrically connected to the signal receiving unit to determine whether the signal received by the signal receiving unit is a trigger signal. The signal transmitting unit is electrically connected to the signal determining unit to transmit the determination signal generated by the signal determining unit to the heating device. The specific installation methods of the signal receiving unit, signal determining unit, and signal transmitting unit can be referenced from the prior art. The present invention does not make any substantial improvements, but only changes the application scenario of the above three units. A control device having this structure is widely applicable to conventional automatic control devices, such as MCUs, DSPs, or single-chip microcomputers. The key feature of the present invention is that the control device combines both the temperature detecting element and the heating device.

[0040] An insulating layer is provided outside the guide duct 1, which separates the guide duct 1 from the external environment when the heating device heats the airflow, thereby avoiding significant heat loss and affecting heating efficiency. Specifically, the heating device is provided in the first duct 11, and an insulating layer is provided outside the first duct 11. The type of insulating layer can be specifically referred to in the prior art, and will not be described in detail here.

[0041] Each air outlet 111 is aligned with the wheels of the bogie 2 to prevent excessive ice and snow from accumulating on the wheels, which would affect the railcar's ability to negotiate curves and the stability of the braking system. Of course, the installation method of the air outlets 111 is not limited to this.

[0042] A valve 121 is provided at the exhaust port of each second duct 12, and when the train is running at normal temperature or dissipating heat at high temperature, as shown in Figure 5, the valve 121 remains closed, in which case there is no need to remove snow or dissipate heat, and the second duct 12 does not spray air, which prevents foreign objects from entering the bogie 2 along the second duct 12 and causing abnormal operation of the bogie 2, and is of positive significance in improving running safety. When snow needs to be removed, the valve 121 is opened to ensure that the air in the second duct 12 can flow out smoothly.

[0043] The railway vehicle bogie snow prevention device further includes a base 3 fixedly disposed above the bogie 2, all of the guide ducts 1 being disposed within the base 3, and at least one press air inlet 31 being disposed on a side wall of the base 3, each press air inlet 31 being connected to one end of all of the guide ducts 1. Considering that the air flow direction in the guide ducts 1 is opposite to the direction of travel of the car body, the air flowing around the car body is naturally forced into the press air inlet 31, and the press air inlet 31 guides the air flowing around the car body to flow into the connected guide duct 1, thereby eliminating the need for a separate fan and effectively eliminating energy consumption by the fan. The amount of air intake through the press air inlet 31 is directly proportional to the traveling speed of the car body, so that the higher the traveling speed of the car body, the greater the amount of air intake through the press air inlet 31 and the faster the air flow velocity in the first duct 11 and the second duct 12.

[0044] The press air intake 31 is a variable cross-section air intake, specifically triangular in shape, and the width of the press air intake 31 gradually increases in the direction approaching the guide duct 1, thereby increasing the wind speed of the press air intake 31 and further improving the snow removal effect.

[0045] An embodiment of the present invention further discloses a railway vehicle, which includes the above bogie snow protection device, and thus has the same beneficial effects.

[0046] Herein, relational terms such as first and second are used merely to distinguish one entity from other entities, and do not require or imply that any such actual relationship or order exists between those entities.

[0047] In this specification, specific examples are used to explain the principle and embodiments of the present invention, and the description of the above examples is only used to understand the method and gist of the present invention. Here, those skilled in the art may make some improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention. [Explanation of symbols]

[0048] 1 ···Guide duct; 2 ···Bogie; 3 ··· base; 11 ···First duct; 12 ···Second duct; 111 ···fumarole; 121 ···valve; 31 ···Press air intake.

Claims

1. A snow accumulation prevention device for a bogie of a railway vehicle, comprising at least one guide duct (1), the flow direction of airflow in all of the guide ducts (1) being opposite to the running direction of the vehicle body, each of the guide ducts (1) comprising a first duct (11) and at least one second duct (12), each of the second ducts (12) crossing one end of the first duct (11) and communicating with it, and the first duct (11) directs air so as to flow through the bogie (2) along the upper surface of the bogie (2). a first duct (11) provided with at least one air outlet (111) that injects air from top to bottom onto the bogie (2) to melt ice and snow accumulated on the bogie (2); and a second duct (12) that guides the air flow so that it flows from the end of the bogie (2) to the bottom, thereby preventing snow from flowing into the bogie (2).

2. 2. The snow accumulation prevention device for a bogie truck of a railway vehicle according to claim 1, wherein the width of the second duct (12) gradually decreases in a direction approaching the bottom of the bogie truck (2).

3. 2. The snow prevention device for a bogie of a railway vehicle according to claim 1, wherein the first duct (11) and / or the second duct (12) is provided with a heating device for heating the air flow.

4. a temperature detection member for detecting a current ambient temperature; a control device coupled to the temperature detecting member and the heating device, when the temperature detecting element detects that the current environmental temperature is higher than a predetermined temperature, the control element controls the heating element to stop heating based on a signal transmitted from the temperature detecting element; A snow accumulation prevention device for bogie trucks of railway vehicles as described in claim 3, characterized in that when the temperature detection element detects that the current ambient temperature is lower than the set temperature, the control element controls the heating element to start heating based on a signal transmitted from the temperature detection element.

5. 4. The snow prevention device for bogies of a railway vehicle according to claim 3, wherein a heat insulating layer is provided outside the guide duct (1).

6. The snow accumulation prevention device for bogies of a railway vehicle according to any one of claims 1 to 5, characterized in that each of the air outlets (111) is aligned with a wheel of the bogie (2).

7. 6. The snow accumulation prevention device for a bogie of a railway vehicle according to claim 1, wherein a valve (121) is provided at the exhaust port of each of the second ducts (12).

8. 6. The snow accumulation prevention device for a bogie bogie of a railway vehicle according to claim 1, further comprising a base (3) fixedly disposed above the bogie bogie (2), wherein all of the guide ducts (1) are provided within the base (3), and at least one press air intake (31) is provided on a side wall of the base (3), each of the press air intakes (31) communicates with one end of all of the guide ducts (1), and the press air intakes (31) guide air flowing around the car body so that the air flows into the guide ducts (1) to which they are connected.

9. 9. The snow prevention device for a bogie of a railway vehicle according to claim 8, wherein the width of the press air intake (31) gradually increases in a direction approaching the guide duct (1).

10. A railway vehicle comprising the bogie snow prevention device according to any one of claims 1 to 9.

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