A snow and sand prevention device, method and system for railway main line wheel detection equipment

Abstract

The present invention discloses a snow and sand prevention device for railway main line wheel detection equipment, comprising a fan, wherein the air outlet of the fan is connected to a cross arm, and a plurality of air outlets are arranged at intervals on the top of the cross arm; the air duct plate is provided with a wind speed sensor, the air duct plate is fixed with an end face of a detection equipment, an air duct is opened inside the air duct plate, and a viewport 1 and a viewport 2 connected to the air duct are arranged on the air duct plate, the air duct is connected to the air outlet, the air blown out by the fan passes through the cross arm and the air duct to viewport 1 and viewport 2. The present invention also discloses a snow and sand prevention method and system for railway main line wheel detection equipment matched with the device.

Description

Technical Field

[0001] The invention relates to a snow and sand prevention device, method and system for railway main line wheel detection equipment, belonging to the technical field of railway line operation and maintenance detection. Background Art

[0002] Currently, more and more wheelset detection equipment is used in railway mainlines and installed on both sides of the rails. The detection method is visual detection. In severe weather conditions such as heavy snow or sandstorms, the sensor's field of view is blocked, and the equipment may even be buried, resulting in the inability to collect valid data and the equipment being unable to work normally.

[0003] Origin of the prior art: The current prior art uses a heater to heat the fluid that flows through the sensor window front panels of each box through a circulation pipe, and uses the heat in the circulation pipe to melt the ice and snow accumulated on the window front panels, thereby ensuring that the wheelset detection equipment works normally in icy and snowy weather.

[0004] Problems:

[0005] 1. Low snow removal efficiency. In heavy snow or blizzard weather, the heat in the circulation pipe cannot melt the ice and snow on the front panel of the window in time, resulting in heavy snow accumulation, burying the equipment, and making the equipment unable to work;

[0006] 2. The laying of fluid circulation pipelines is complicated. The wheelset inspection equipment has a total of eight boxes, all of which need to be heated to melt ice and snow. The fluid circulation pipelines have many branches, forming tree-like forks, which are complicated to lay. Each pipeline needs to be insulated, which is not easy to maintain;

[0007] 3. High energy consumption. Because the overall fluid circulation pipeline has many branches and a large span, the heat loss is increased and the energy utilization rate is low;

[0008] 4. The detection accuracy is low in bad weather. In bad weather conditions such as snow or sandstorms, the sensor viewport optical path is blocked by snow or dust, which affects the data collection of the wheelset detection equipment and causes large measurement errors. When the amount of snow or dust is heavy, the sensor viewport is directly covered and cannot be detected;

[0009] 5. Low reliability. When a power outage occurs, the heating source stops working. In cold climates, the fluid will freeze, causing the entire system to shut down and making maintenance extremely difficult. Summary of the invention

[0010] The purpose of the present invention is to provide a snow and sand prevention device, method and system for railway mainline wheel detection equipment, so as to solve the defects of the prior art that the field of view of the sensor is blocked under severe weather conditions such as heavy snow or sandstorms, and the equipment may even be buried, resulting in the inability to collect valid data and the equipment cannot work normally.

[0011] A snow and sand prevention device for railway main line wheel detection equipment, comprising:

[0012] A fan, wherein the fan outlet is connected to a cross arm, and a plurality of air outlets are arranged at intervals on the top of the cross arm;

[0013] An air duct plate, wherein the air duct plate is provided with a wind speed sensor, the air duct plate is fixed with an end face of a detection device, an air duct is opened inside the air duct plate, a viewport one and a viewport two connected to the air duct are provided on the air duct plate, the air duct is connected to the air outlet, and the air blown out by the fan passes through the air outlet of the cross arm and the air duct guide viewport one and viewport two.

[0014] Furthermore, a fan base is provided at the bottom of the fan, and the fan base is fixed on a concrete foundation.

[0015] Furthermore, the air outlet of the fan is also connected to a ventilation hose, the ventilation hose is connected to a reducer, and the reducer is connected to the cross arm.

[0016] Furthermore, one end of the cross arm is connected to the reducer, and the other end is sealed.

[0017] Furthermore, the cross arm is a rectangular air duct, and the cross-sectional area of ​​the rectangular air duct is larger than the cross-sectional area of ​​the circular end of the reducer.

[0018] Furthermore, the air outlets are provided in at least four groups, which are correspondingly arranged on four groups of air duct plates.

[0019] A method for preventing snow and sand from occurring in railway mainline wheel detection equipment, the method comprising:

[0020] Get the environmental photos captured by the viewport industrial camera and send them to the host computer software, and judge different climate conditions based on the environmental photos;

[0021] The wind speed sensor obtains the wind speed of the current environment and sends it to the host computer software;

[0022] The host computer software calculates the required fan static pressure and air volume based on the current climate conditions and ambient wind speed;

[0023] The obtained fan static pressure and air volume are sent to the PLC, and the PLC adjusts the fan frequency to the required static pressure and air volume, so that the positive line wheel detection equipment can work normally around the clock.

[0024] Furthermore, the formula for calculating the wind speed at the industrial camera viewport outlet is as follows:

[0025] Object speed in front of the viewport: The maximum vertical speed V of falling snow, rain or gravel 11 :

[0026] Air resistance

[0027] When F 1 = mg, where: C is the air resistance coefficient, ρ is the air density, S is the windward area of ​​the object, V 11 is the vertical velocity of the object, m is the weight of the object, g is the acceleration due to gravity, V 12 Wind speed in the working environment of the equipment;

[0028]

[0029] The speed of the object in front of the viewport The windward area S and the weight m of the object are obtained from the local climate statistics table over the years;

[0030] The calculation formula of the sensor viewport wind speed is as follows:

[0031] Sensor viewport wind speed V 2 :According to the impulse theorem: Ft=mV 1

[0032] F=P 动 *S, obtained from Bernoulli's equation

[0033] Where: F is the force of wind acting on the object, t is the action time, P 动 The dynamic pressure generated by the wind blowing out of the viewport;

[0034] When Can blow objects away.

[0035] Furthermore, the air volume is calculated as follows: H = 4*(S 1 +S 2 )*V*3600

[0036] Where: S 1 is the cross-sectional area of ​​the air outlet of viewport 1, S 2 is the cross-sectional area of ​​the air outlet of viewport 2, and H is the required air output per hour of the fan;

[0037] The fan static pressure calculation:

[0038] Air duct resistance at circular air duct:

[0039] Where: P 1 is the air duct resistance at the circular air duct, L 1 is the length of the circular duct, λ 1 is the friction resistance coefficient, D is the diameter of the circular duct, ρ is the air density, and V is the average velocity of the air in the duct;

[0040] Duct resistance at rectangular duct:

[0041] Where: P 2 is the duct resistance in the rectangular duct, L 2 is the length of the rectangular duct, λ 2 is the friction resistance coefficient, a is the length of the rectangular duct section, b is the width of the rectangular duct section, ρ is the air density, and V is the average velocity of the air in the duct;

[0042] Local resistance calculation:

[0043] Where: ζ is the local resistance coefficient, ρ is the air density, and V is the average velocity of the air in the duct;

[0044] Fan static pressure P 静 ≥P 1 +P 2 +P 3 +P 动 .

[0045] A snow and sand prevention system for railway mainline wheel detection equipment, the system comprising:

[0046] Industrial camera, used to capture photos of the current environment and send them to the host computer software;

[0047] Wind speed sensor, used to measure the wind speed in the current environment and send it to the host computer software;

[0048] The host computer software is used to judge the current different climate conditions based on the environmental photos, and calculate the required fan static pressure and air volume through the current different climate conditions and the current environmental wind speed;

[0049] The PLC module is used to adjust the fan frequency to the required static pressure and air volume according to the fan static pressure and air volume.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The present invention uses a fan and a cross arm to blow high-speed wind to the viewport 1 and the viewport 2 to directly blow away foreign objects such as rain, snow, and dust, so that there will not be a large amount of snow accumulation that causes the equipment to be unable to be used, thereby improving the efficiency of snow removal and dust removal. Furthermore, the viewport 1 and the viewport 2 blow high-speed wind to directly blow away foreign objects such as rain, snow, and dust, so that the visual sensor has a clean field of view, is not affected by debris when collecting data, and the collected data is accurate;

[0052] Due to the operation of the snow and sand prevention system, the visual sensor's viewport is always kept in a positive pressure state, and dust, stains, etc. are not easy to adhere to the optical glass window, so that the entire wheelset detection system can operate for a long time without maintenance;

[0053] In the present invention, the fan blows air into the cross arm through the ventilation hose, and then the wind blows out from the viewports of each sensor of the box along the wind duct to blow away foreign objects in the sensor's field of view; because the air outlet is designed with an air guide structure with the same angle as the sensor's field of view, the wind blown out of the air outlet fills the sensor's field of view; the fan is connected to an intelligent frequency modulation device, so that the system can adjust the air volume of the air outlet according to different climatic conditions such as rain, snow, wind and sand, and can meet the normal operation of the wheelset detection equipment around the clock;

[0054] The cross arm of the present invention is not only a basic installation part of the detection equipment but also serves as a ventilation duct connecting the boxes, without adding additional structural parts, and the overall design is simple and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a schematic diagram of the structural application of the present invention;

[0056] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0057] Figure 3 is a schematic diagram of the testing equipment;

[0058] Figure 4 It is a schematic diagram of the structure of the air duct plate of the present invention;

[0059] In the figure: 1. Fan; 2. Fan base; 3. Ventilation hose; 4. Reducer; 5. Cross arm; 6. Duct plate; 7. Testing equipment; 8. Air outlet one; 9. Air outlet two; 10. Air outlet three; 11. Air outlet four; 12. Wind speed sensor; 13. Viewport one; 14. Viewport two; 15. Air duct. DETAILED DESCRIPTION

[0060] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0061] Example 1

[0062] like Figure 1-Figure 4 As shown, a snow and sand prevention device for railway main line wheel detection equipment is disclosed, comprising:

[0063] A fan 1, wherein the air outlet of the fan 1 is connected to a cross arm 5, and a plurality of air outlets are arranged at intervals on the top of the cross arm 5;

[0064] The air duct plate 6 is provided with a wind speed sensor 12, the air duct plate 6 is fixed with an end face of a detection device, an air duct 15 is opened inside the air duct plate 6, a viewport 13 and a viewport 2 14 connected to the air duct 15 are provided on the air duct plate 6, the air duct 15 is connected to the air outlet, and the air blown out of the fan 1 is guided to the viewport 1 13 and the viewport 2 14 through the air outlet of the cross arm 5 and the air duct 15.

[0065] In this embodiment, in order to make the fan 1 firmly fixed, a fan base 2 is provided at the bottom of the fan 1, and the fan base 2 is fixed on the concrete foundation, which provides a stable and reliable working foundation for the fan;

[0066] In this embodiment, the air outlet of the fan 1 is also connected to a ventilation hose 3, and the ventilation hose 3 is connected to a reducer 4. The reducer 4 is connected to a cross arm 5, one end of the cross arm 5 is connected to the reducer 4, and the other end is sealed. The cross arm 5 is a rectangular air duct, and the cross-sectional area of ​​the rectangular air duct is larger than the cross-sectional area of ​​the circular end of the reducer. The purpose of setting the reducer 4 here is to convert the circular air duct of the fan into a rectangular air duct of the cross arm. The cross-sectional area of ​​the rectangular end is preferably larger than the cross-sectional area of ​​the circular end, so the air volume and air pressure of the fan will not be reduced when the diameter is changed; a hose is used to connect the fan and the reducer, so that the vibration of the equipment is avoided from being transmitted to the fan, and the service life and reliability of the fan are improved.

[0067] The cross arm 5 is installed on the embedded base. The top surface of the cross arm is provided with a fixing hole for the detection equipment. The overall hole position is symmetrical with the center of the rail. One end of the cross arm is fixed with a reducer and the other end is sealed. The better cross arm is hollow, and the top surface is provided with a ventilator connected to the air duct plate, which connects the air ducts of each box so that one fan can ventilate four boxes.

[0068] The device of the present invention is blown by a fan through a ventilation hose into the cross arm, and then the wind blows out from the viewports of each sensor of the box along the wind duct to blow away foreign objects in the sensor's field of view; because the air outlet is designed with a wind guide structure with the same angle as the sensor's field of view, the wind blown out of the air outlet fills the sensor's field of view; the fan is connected to an intelligent frequency modulation device, so that the system can adjust the air volume of the air outlet according to different climatic conditions such as rain, snow, wind and sand, and can meet the normal operation of the wheelset detection equipment around the clock;

[0069] The cross arm of the present invention is not only a basic installation part of the detection equipment but also serves as a ventilation duct connecting the boxes, without adding additional structural parts, and the overall design is simple and reliable.

[0070] Example 2

[0071] The present invention also provides a method for preventing snow and sand for railway main line wheel detection equipment, the method comprising:

[0072] Step 1: Obtain environmental photos captured by the viewport industrial camera and send them to the host computer software, and judge different climate conditions based on the environmental photos;

[0073] Step 2: The wind speed sensor obtains the wind speed of the current environment and sends it to the host computer software;

[0074] Step 3, the host computer software calculates the required fan static pressure and air volume according to the current climate conditions and ambient wind speed;

[0075] Step 4, sending the obtained fan static pressure and air volume to the PLC, and the PLC adjusts the fan frequency to the required static pressure and air volume, so that the positive line wheel detection equipment can work normally around the clock.

[0076] In this embodiment, the specific steps for calculating the required fan static pressure and air volume are as follows:

[0077] The formula for calculating the wind speed at the industrial camera viewport outlet is as follows:

[0078] Object speed in front of the viewport: The maximum vertical speed V of falling snow, rain or gravel 11 :

[0079] Air resistance

[0080] When F 1 = mg, where: C is the air resistance coefficient, ρ is the air density, S is the windward area of ​​the object, V 11 is the vertical velocity of the object, m is the weight of the object, g is the acceleration due to gravity, V 12 Wind speed in the working environment of the equipment;

[0081]

[0082] The speed of the object in front of the viewport The windward area S and the weight m of the object are obtained from the local climate statistics table over the years;

[0083] The calculation formula of the sensor viewport wind speed is as follows:

[0084] Sensor viewport wind speed V 2 :According to the impulse theorem: Ft=mV 1

[0085] F=P 动 *S, obtained from Bernoulli's equation

[0086] Where: F is the force of wind acting on the object, t is the action time, P 动 The dynamic pressure generated by the wind blowing out of the viewport; When Can blow objects away.

[0087] Air volume calculation: H = 4*(S 1 +S 2 )*V*3600

[0088] Where: S1 is the cross-sectional area of ​​the air outlet of viewport 1, S 2 is the cross-sectional area of ​​the air outlet of viewport 2, and H is the required air output per hour of the fan;

[0089] The fan static pressure calculation:

[0090] Air duct resistance at circular air duct:

[0091] Where: P 1 is the air duct resistance at the circular air duct, L 1 is the length of the circular duct, λ 1 is the friction resistance coefficient, D is the diameter of the circular duct, ρ is the air density, and V is the average velocity of the air in the duct;

[0092] Duct resistance at rectangular duct:

[0093] Where: P 2 is the duct resistance in the rectangular duct, L 2 is the length of the rectangular duct, λ 2 is the friction resistance coefficient, a is the length of the rectangular duct section, b is the width of the rectangular duct section, ρ is the air density, and V is the average velocity of the air in the duct;

[0094] Local resistance calculation:

[0095] Where: ζ is the local resistance coefficient, ρ is the air density, and V is the average velocity of the air in the duct;

[0096] Fan static pressure P 静 ≥P 1 +P 2 +P 3 +P 动 .

[0097] Example 3

[0098] The present invention also discloses a snow and sand prevention system for railway main line wheel detection equipment, the system comprising:

[0099] Industrial camera, used to capture photos of the current environment and send them to the host computer software;

[0100] Wind speed sensor, used to measure the wind speed in the current environment and send it to the host computer software;

[0101] The host computer software is used to judge the current different climate conditions based on the environmental photos, and calculate the required fan static pressure and air volume through the current different climate conditions and the current environmental wind speed;

[0102] The PLC module is used to adjust the fan frequency to the required static pressure and air volume according to the fan static pressure and air volume.

[0103] The system of the present invention can set the working condition of the fan according to different climatic conditions such as rain, snow, sandstorm, etc.; the preferred control system can also automatically adjust the air volume and static pressure, etc., firstly, the environmental photos (such as rain, snow, wind and sand, etc.) captured by the viewport two industrial camera are sent to the host computer software, and the host computer software judges different climatic conditions based on this, and at the same time the wind speed sensor measures the wind speed of the current environment and sends it to the host computer software; the host computer software calculates the required fan static pressure and air volume according to the current climatic conditions and environmental wind speed and the following formula; then the host computer software transmits the information to the PLC, and the PLC adjusts the required static pressure and air volume by adjusting the frequency of the fan, so that the wheelset detection equipment can work normally around the clock, meeting the normal work of the wheelset detection equipment around the clock.

[0104] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A snow and sand prevention device for railway main line wheel detection equipment, characterized in that: include: A fan (1), wherein an air outlet of the fan (1) is connected to a cross arm (5), and a plurality of air outlets are arranged at intervals on the top of the cross arm (5); An air duct plate (6), wherein the air duct plate (6) is provided with a wind speed sensor (12), and the wind speed sensor (12) is used to obtain the wind speed of the current environment; the air duct plate (6) is fixedly provided with an end face of a detection device, and an air duct (15) is opened inside the air duct plate (6); a viewport 1 (13) and a viewport 2 (14) connected to the air duct (15) are provided on the air duct plate (6), and the air duct (15) is connected to an air outlet; the wind blown out by the fan (1) is guided to the viewport 1 (13) and the viewport 2 (14) through the air outlet of the cross arm (5) and the air duct (15), so as to blow away foreign objects in the field of view of the sensor; the air outlet is provided with an air guide structure with the same angle as the field of view of the sensor, so that the wind blown out of the air outlet fills the field of view of the sensor.

2. The snow and sand prevention device for railway main line wheel detection equipment according to claim 1 is characterized in that: A fan base (2) is provided at the bottom of the fan (1), and the fan base (2) is fixed on a concrete foundation.

3. The snow and sand prevention device for railway main line wheel detection equipment according to claim 1 is characterized in that: The air outlet of the fan (1) is also connected to a ventilation hose (3), the ventilation hose (3) is connected to a reducer (4), and the reducer (4) is connected to a cross arm (5).

4. The snow and sand prevention device for railway main line wheel detection equipment according to claim 3 is characterized in that: One end of the cross arm (5) is connected to the reducer (4), and the other end is sealed.

5. The snow and sand prevention device for railway main line wheel detection equipment according to claim 3 is characterized in that: The cross arm (5) is a rectangular air duct, and the cross-sectional area of ​​the rectangular air duct is larger than the cross-sectional area of ​​the circular end of the reducer.

6. The snow and sand prevention device for railway main line wheel detection equipment according to claim 1 is characterized in that: The air outlets are provided in at least four groups, which are correspondingly arranged on four groups of air duct plates (6).

7. A method for a snow and sand prevention device for railway main line wheel detection equipment based on any one of claims 1 to 6, characterized in that: The method comprises: Get the environmental photos captured by the viewport industrial camera and send them to the host computer software, and judge different climate conditions based on the environmental photos; The wind speed sensor obtains the wind speed of the current environment and sends it to the host computer software; The host computer software calculates the required fan static pressure and air volume based on the current climate conditions and ambient wind speed; The obtained fan static pressure and air volume are sent to the PLC, and the PLC adjusts the fan frequency to the required static pressure and air volume, so that the positive line wheel detection equipment can work normally around the clock.

8. The method for preventing snow and sand from railway mainline wheel detection equipment according to claim 7, characterized in that: The formula for calculating the wind speed at the industrial camera viewport outlet is as follows: Object speed in front of the viewport: The maximum vertical speed V of falling snow, rain or gravel 11 : Air resistance When F1 = mg, the object speed is the largest, where: C is the air resistance coefficient, ρ is the air density, S is the windward area of ​​the object, V 11 is the vertical velocity of the object, m is the weight of the object, g is the acceleration due to gravity, V 12 Wind speed in the equipment working environment; The speed of the object in front of the viewport The windward area S and the weight m of the object are obtained from the local climate statistics table over the years; The calculation formula of the sensor viewport wind speed is as follows: Sensor viewport wind speed V2: According to the impulse theorem: Ft = mV1 F=P 动 *S, obtained from Bernoulli's equation Where: F is the force of wind acting on the object, t is the action time, P 动 The dynamic pressure generated by the wind blowing out of the viewport; When The object can be blown away.

9. The method for preventing snow and sand from railway mainline wheel detection equipment according to claim 7, characterized in that: The air volume calculation: H = 4*(S1+S2)*V*3600 Where: S1 is the cross-sectional area of ​​the air outlet of viewport 1, S2 is the cross-sectional area of ​​the air outlet of viewport 2, and H is the required air volume of the fan per hour; The fan static pressure calculation: Air duct resistance at circular air duct: Where: P1 is the duct resistance at the circular duct, L1 is the length of the circular duct, λ1 is the friction resistance coefficient, D is the diameter of the circular duct, ρ is the air density, and V is the average speed of the air in the duct; Duct resistance at rectangular duct: Where: P2 is the duct resistance at the rectangular duct, L2 is the length of the rectangular duct, λ2 is the friction resistance coefficient, a is the length of the rectangular duct section, b is the width of the rectangular duct section, ρ is the air density, and V is the average speed of the air in the duct; Local resistance calculation: Where: ζ is the local resistance coefficient, ρ is the air density, and V is the average velocity of the air in the duct; Fan static pressure P 静 ≥P1+P2+P3+P 动 .

10. A system for preventing snow and sand for railway mainline wheel detection equipment based on claim 7, characterized in that: The system comprises: Industrial camera, used to capture photos of the current environment and send them to the host computer software; Wind speed sensor, used to measure the wind speed in the current environment and send it to the host computer software; The host computer software is used to judge the current different climate conditions based on the environmental photos, and calculate the required fan static pressure and air volume through the current different climate conditions and the current environmental wind speed; The PLC module is used to adjust the fan frequency to the required static pressure and air volume according to the fan static pressure and air volume.

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