Purging type railway turnout snow removing device

Abstract

The utility model discloses a purging type railway turnout snow removal device, belongs to the technical field of turnout snow removal, and solves the problems that blown snow cannot be effectively guided, and even snow accumulation in a turnout may be increased. The exhaust pipeline is communicated with the high-pressure fan, one end of the exhaust pipeline is open, the other end of the exhaust pipeline is closed, the airflow pressurizing nozzles are communicated with the exhaust pipeline, and the airflow pressurizing nozzles are used for being arranged in turnout gaps of railway stock rails. In practical application, after the snowfall is detected by the snowfall sensor, a signal is transmitted to the central controller, and the controller controls the high-pressure fan to work and guides air to flow in the exhaust pipeline. After air enters the airflow pressurizing nozzles, part of the air directly flows through the main air pipe to form an air curtain, and part of the air enters the inclined air pipe and then obliquely leaves from the flat grooves of the branch pipes, so that the air curtain directly flows and diffuses outwards, snow is prevented from falling into turnout gaps and being guided to diffuse out of a railway, and the accumulation amount in the turnout is reduced.

Description

Technical Field

[0001] This utility model relates to the field of turnout snow removal technology, and in particular to a blow-type railway turnout snow removal device. Background Technology

[0002] Snow removal from railway switches is crucial for ensuring railway safety. In winter, switches are easily covered by snow, affecting their normal operation. Traditional methods include manual sweeping using brooms and shovels, but this is inefficient. Currently, mechanical and heating equipment are widely used for snow removal. Electric heating snow melting systems for switches automatically activate heating elements on key components such as the switch rails and stock rails to melt snow. Other methods include pneumatic snow removal, which uses compressed air to disperse snow, and rotary snowplows whose rotating parts can throw away snow. These methods effectively prevent switch blockages caused by snow accumulation, ensuring train operation safety and reducing delays and other problems caused by switch malfunctions.

[0003] A specific pneumatic snow removal method, such as the airflow incremental type railway turnout snow removal device with application number CN202123445064.7, has the following technical features: it includes an exhaust duct, a high-pressure blower, a central controller, a snow volume sensor, a fixed bracket, and airflow booster nozzles. An exhaust duct is provided on one side of the railway main rail. The exhaust duct is a pipe with one open end and one closed end, and the open end of the exhaust duct is fixedly connected to the output end of the high-pressure blower. The outer surface of the exhaust duct is uniformly provided with n airflow booster nozzles along the length direction, where n is a positive integer. Each airflow booster nozzle is connected to the exhaust duct. The output end of each airflow booster nozzle is inserted into the turnout gap of the railway main rail, and each airflow booster nozzle is fixed to the railway main rail by a fixed bracket. The central controller and the snow volume sensor are arranged sequentially from left to right on one side of the high-pressure blower.

[0004] In the aforementioned airflow-increasing railway turnout snow removal device, an airflow booster nozzle sprays an air curtain located above the turnout gap. The air curtain is located between adjacent airflow booster nozzles. When snow falls, it is guided by the air curtain and falls to both sides of the turnout gap. Although this can prevent snow from entering the turnout gap, the blown snow cannot be effectively guided and may even increase the amount of snow accumulating inside the turnout.

[0005] Therefore, a snow removal device for railway turnouts with a blowing mechanism was proposed to solve or alleviate the above problems. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a snow removal device for railway turnouts that involves blowing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A snow removal device for railway turnouts using a blowing method includes a high-pressure blower, an exhaust duct connected to the high-pressure blower and open at one end and closed at the other, and several airflow boosting nozzles connected to the exhaust duct. These airflow boosting nozzles are installed within the turnout gaps of the railway main rails. Each airflow boosting nozzle includes a main duct whose axis is parallel to the length of the railway main rails, and an inclined duct open at one end and closed at the other. The axes of the inclined duct and the main duct are on the same horizontal plane, and the inclined duct is inclined towards the inner side of the railway main rails. An angle of 1-15° exists between the axis of the inclined duct and the axis of the main duct. Several flat grooves communicating with the interior of the inclined duct are located on the inclined duct, facing outwards from the railway main rails. An angle of 1-15° exists between the axis of the flat grooves and the axis of the main duct.

[0009] Preferably, the airflow booster nozzle further includes a three-way connector and a connecting pipe connected to the three-way connector. The connecting pipe is L-shaped, and both the main air duct and the inclined air duct are connected to the end of the three-way connector away from the connecting pipe. A partition separating the main air duct and the inclined air duct is fixedly connected inside the three-way connector.

[0010] Preferably, the inclined duct is fixedly connected to a plurality of branch pipes that are evenly spaced along the length of the inclined duct and communicate with the interior of the inclined duct on the side facing the main duct, and the inner opening of the branch pipe is a flat groove.

[0011] Preferably, the length of the inclined duct is greater than the length of the main duct.

[0012] Preferably, it also includes a snow volume sensor and a central controller, wherein the output terminal of the snow volume sensor is coupled to the input terminal of the central controller, and the input and output terminals of the central processor are coupled to the high-pressure blower.

[0013] Preferably, it also includes a fan protection circuit, which is coupled to the high-pressure fan.

[0014] Preferably, the wind turbine protection circuit includes an input power module, a soft start module, and a bypass contactor module;

[0015] The input power module is used to connect to an external power source. The output terminal of the input power module is connected to the soft start module and the bypass contactor module respectively. The soft start module and the bypass contactor module are both coupled to the power connection terminal of the high-pressure blower. The soft start module is used to regulate and control the starting voltage of the high-pressure blower. The bypass contactor module is used to switch to direct power supply after the high-pressure blower starts.

[0016] Preferably, the input power module includes a three-phase circuit breaker and an EMI filter. The L1, L2, and L3 input pins of the three-phase circuit breaker are used to connect to an external power supply. The T1, T2, and T3 output pins of the three-phase circuit breaker are connected to the input terminal of the EMI filter. The output terminal of the EMI filter is connected to the anode group of the three-phase thyristors in the soft-start module. The soft-start module includes a three-phase thyristor and a KC04 integrated phase-shift trigger. The cathode group of the three-phase thyristor is connected to the input terminal of the bypass contactor module. The output terminal of the KC04 integrated phase-shift trigger is connected to the control electrode of the three-phase thyristor. The input terminal of the KC04 integrated phase-shift trigger is powered by an external power supply. The bypass contactor module includes an AC contactor and a bimetallic strip temperature control switch. The main contact input terminal of the AC contactor is connected to the output terminal of the three-phase thyristor. The U, V, and W output terminals of the AC contactor are connected to the power supply terminal of the high-pressure blower.

[0017] Preferably, the fan protection circuit further includes a low-temperature start-up optimization module, a current monitoring module, and an over-temperature protection module;

[0018] The over-temperature protection module includes a bimetallic strip temperature control switch, a PTC thermistor, a temperature control relay, and a cooling fan. The cooling fan is installed inside the casing of the high-pressure blower. The coil of the AC contactor is connected to an external power source via the bimetallic strip temperature control switch. One end of the PTC thermistor is grounded, and the other end is connected to the coil of the temperature control relay. The normally open contact of the temperature control relay is connected to the power supply terminal of the cooling fan. The power supply terminal and the coil of the temperature control relay are energized. The low-temperature start-up optimization module includes an NTC thermistor and a time-delay relay. The NTC thermistor is installed on the high-pressure blower. One end of the resistor is connected to the main contact output terminal of the AC contactor, and the other end of the NTC thermistor is connected to the normally closed contact terminal of the time delay relay. One end of the coil of the time delay relay is connected to one end of the coil of the AC contactor, and the other end of the coil of the time delay relay is connected to an external power supply. The normally closed contact terminal of the time delay relay is short-circuited to the NTC thermistor. The current monitoring module includes a current transformer, an overcurrent relay, and a circuit breaker. The primary side of the current transformer is connected through a core to the U-phase line of the motor in the high-voltage blower. The secondary side of the current transformer is connected to the input terminal of the overcurrent relay. The normally closed contact of the overcurrent relay is connected in series in the trip coil circuit of the three-phase circuit breaker.

[0019] This utility model has the following beneficial effects:

[0020] In practical applications, after the snowfall sensor detects the snowfall, it transmits the signal to the central controller. The controller then controls the high-pressure blower to operate, guiding the air to flow within the exhaust duct. After the air enters the airflow booster nozzle, some air is directly projected through the main duct to form an air curtain, while some enters the inclined duct and exits at an angle from the branch pipe's flat groove. This direct and outward diffusion of the air curtain prevents snow from falling into the switch gaps and guides the snow to diffuse outwards from the railway, reducing the amount of snow accumulating inside the switch. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural block diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the airflow booster nozzle in this utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 This is a cross-sectional view of the airflow booster nozzle in this utility model;

[0026] Figure 5 This is a structural block diagram of the fan protection circuit in this utility model.

[0027] In the diagram: 1. Snow sensor; 2. Central controller; 3. High-pressure blower; 4. Connecting pipe; 5. Three-way connector; 6. Main duct; 7. Inclined duct; 8. Branch pipe; 9. Flat trough; 10. Partition; 11. Input power module; 12. Soft start module; 13. Bypass contactor module; 14. Low temperature start optimization module; 15. Current monitoring module; 16. Temperature protection module. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Snow removal devices for railway turnouts, such as blow-type snow removal systems. Figure 1 As shown, the system includes a snow sensor 1, a central controller 2, a high-pressure blower 3, an exhaust duct connected to the high-pressure blower 3 (open at one end and closed at the other), and several airflow booster nozzles connected to the exhaust duct. The output of the snow sensor 1 is coupled to the input of the central controller 2, and the input / output of the central processor is coupled to the high-pressure blower 3. The airflow booster nozzles are used to install in the gaps of the railway track switches, such as... Figures 2 to 4As shown, the airflow booster nozzle includes a main air duct 6 whose axis is in the same direction as the length of the railway main rail, and an inclined air duct 7 that is open at one end and closed at the other. The axes of the inclined air duct 7 and the main air duct 6 are on the same horizontal plane, and the inclined air duct 7 is inclined towards the inside of the railway main rail. There is an angle of 1-15° between the axis of the inclined air duct 7 and the axis of the main air duct 6. There are several flat grooves 9 on the inclined air duct 7 that communicate with its interior. The flat grooves 9 are arranged towards the outside of the railway main rail, and there is an angle of 1-15° between the axis of the flat grooves 9 and the axis of the main air duct 6.

[0035] like Figures 2 to 4 As shown, the airflow booster nozzle also includes a three-way connector 5 and a connecting pipe 4 connected to the three-way connector 5. The connecting pipe 4 is L-shaped, and both the main air duct 6 and the inclined air duct 7 are connected to the end of the three-way connector 5 away from the connecting pipe 4. A partition plate 10 is fixedly connected inside the three-way connector 5 to separate the main air duct 6 and the inclined air duct 7. Several branch pipes 8 are fixedly connected to the side of the inclined air duct 7 facing the main air duct 6, which are evenly spaced along the length of the inclined air duct 7 and connected to the inside of the inclined air duct 7. The inner opening of the branch pipe 8 is a flat groove 9. The length of the inclined air duct 7 is greater than the length of the main air duct 6.

[0036] like Figure 5 As shown, it also includes a fan protection circuit, which is coupled to the high-pressure fan 3. The fan protection circuit includes an input power module 11, a soft start module 12, a bypass contactor module 13, a low temperature start optimization module 14, a current monitoring module 15, and an over-temperature protection module 16.

[0037] The input power module 11 is used to connect to an external power source. The output terminal of the input power module 11 is connected to the soft start module 12 and the bypass contactor module 13 respectively. Both the soft start module 12 and the bypass contactor module 13 are coupled to the power supply terminal of the high-pressure blower 3. The soft start module 12 is used to regulate and control the starting voltage of the high-pressure blower 3. The bypass contactor module 13 is used to switch to direct power supply after the high-pressure blower 3 starts.

[0038] The input power module 11 includes a three-phase circuit breaker and an EMI filter. The L1, L2, and L3 input pins of the three-phase circuit breaker are used to connect to an external power supply. The T1, T2, and T3 output pins of the three-phase circuit breaker are connected to the input terminals of the EMI filter. The output terminals of the EMI filter are connected to the anode group of the three-phase thyristors in the soft-start module 12. The soft-start module 12 includes a three-phase thyristor and a KC04 integrated phase-shift trigger. The cathode group of the three-phase thyristor is connected to the input terminal of the bypass contactor module 13. The output terminal of the KC04 integrated phase-shift trigger is connected to the control electrode of the three-phase thyristor. The input terminal of the KC04 integrated phase-shift trigger is powered by an external power supply. The bypass contactor module 13 includes an AC contactor and a bimetallic strip temperature control switch. The main contact input terminal of the AC contactor is connected to the output terminal of the three-phase thyristor. The U, V, and W output terminals of the AC contactor are connected to the power supply terminals of the high-pressure blower 3.

[0039] The over-temperature protection module 16 includes a bimetallic temperature control switch, a PTC thermistor, a temperature control relay, and a cooling fan. The cooling fan is installed inside the casing of the high-pressure blower 3. The coil of the AC contactor is connected to an external power supply through the bimetallic temperature control switch. One end of the PTC thermistor is grounded, and the other end is connected to the coil of the temperature control relay. The normally open contact of the temperature control relay is connected to the energized terminal of the cooling fan. The energized terminal and coil of the temperature control relay are connected. The low-temperature start-up optimization module 14 includes an NTC thermistor and a time-delay relay. The NTC thermistor is installed on the high-pressure blower 3. One end of the resistor is connected to the main contact output terminal of the AC contactor, and the other end of the NTC thermistor is connected to the normally closed contact terminal of the time delay relay. One end of the coil of the time delay relay is connected to one end of the coil of the AC contactor, and the other end of the coil of the time delay relay is connected to an external power supply. The normally closed contact terminal of the time delay relay is short-circuited to the NTC thermistor. The current monitoring module 15 includes a current transformer, an overcurrent relay, and a circuit breaker. The primary side of the current transformer is connected through a core to the U-phase line of the motor in the high-pressure fan 3. The secondary side of the current transformer is connected to the input terminal of the overcurrent relay. The normally closed contact of the overcurrent relay is connected in series in the trip coil circuit of the three-phase circuit breaker.

[0040] In practical application, after the snow sensor 1 detects the snowfall, it transmits the signal to the central controller 2. The central controller 2 then controls the high-pressure blower 3 to operate, thereby guiding the air to flow in the exhaust duct. After the air enters the airflow booster nozzle, some of the air leaves through the main air duct 6, appearing as a direct jet, forming an air curtain between adjacent airflow booster nozzles. Some of the air also enters the inclined air duct 7. Since the inclined air duct 7 is closed, the air is pressurized and leaves from the flat groove 9 of the branch pipe 8, appearing as an inclined outward airflow. This allows the air curtain to appear as a direct jet and diffuse outward. As a result, when the snow falls, it can not only prevent the snow from falling into the gaps of the switch through the air curtain, but also guide the snow to diffuse outward from the railway, reducing the amount of snow accumulation inside the switch.

[0041] Furthermore, when the high-pressure blower 3 needs to operate, the protection circuit of the high-pressure blower 3 also operates. The input power module 11 transmits the AC 380V external power supply to the soft start module 12 after purification by the three circuit breakers and EMI filters. The three-phase thyristors are triggered by the KC04 integrated phase-shift trigger to gradually increase the output voltage. At the same time, under low temperature conditions, the NTC thermistor is automatically connected in series in the motor circuit of the high-pressure blower 3 to suppress the cold start surge current. After the motor speed of the high-pressure blower 3 stabilizes, the time delay relay short-circuits the NTC thermistor and triggers the AC contactor in the bypass contactor to close, switching to the full-voltage direct power supply mode.

[0042] During operation, the bimetallic strip temperature control switch monitors the winding temperature in real time. If it exceeds 120°C, it physically cuts off the coil power supply circuit of the AC contactor and forces the machine to stop. At the same time, the temperature control relay is linked to start the auxiliary cooling fan to accelerate cooling. Meanwhile, the current transformer continuously monitors the motor operating current. When an overcurrent occurs, the overcurrent relay immediately triggers the three-phase circuit breaker to trip and cut off the power supply, thereby achieving protection from start-up suppression, overload protection to fault response.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A snow removal device for a switch of a railway track, characterized in that The system includes a high-pressure blower (3), an exhaust duct connected to the high-pressure blower (3) with one end open and the other end closed, and several airflow boosting nozzles connected to the exhaust duct. The airflow boosting nozzles are used to be installed in the turnout gaps of the railway main rail. The airflow boosting nozzles include a main air pipe (6) with the same axial direction as the length direction of the railway main rail, and an inclined air pipe (7) with one end open and the other end closed. The axes of the inclined air pipe (7) and the main air pipe (6) are located on the same horizontal plane, and the inclined air pipe (7) is inclined towards the inside of the railway main rail. There is an angle of 1-15° between the axis of the inclined air pipe (7) and the axis of the main air pipe (6). There are several flat grooves (9) on the inclined air pipe (7) that are connected to its interior. The flat grooves (9) are arranged towards the outside of the railway main rail. There is an angle of 1-15° between the axis of the flat grooves (9) and the axis of the main air pipe (6).

2. The snow removal apparatus of claim 1, wherein, The airflow booster nozzle also includes a three-head connector (5) and a connecting pipe (4) connected to the three-head connector (5). The connecting pipe (4) is L-shaped, and the main air duct (6) and the inclined air duct (7) are both connected to the end of the three-head connector (5) away from the connecting pipe (4). A partition (10) is fixedly connected inside the three-head connector (5) to separate the main air duct (6) and the inclined air duct (7).

3. The snow removal apparatus of claim 2, wherein, The inclined air duct (7) is fixedly connected to a number of branch pipes (8) that are evenly spaced along the length of the inclined air duct (7) and communicate with the interior of the inclined air duct (7). The inner opening of the branch pipe (8) is a flat groove (9).

4. A snow removal apparatus for a switch according to any one of claims 1-3, characterized in that, The length of the inclined duct (7) is greater than the length of the main duct (6).

5. The snow removal apparatus of claim 1, wherein, It also includes a snow sensor (1) and a central controller (2), the output of which is coupled to the input of the central controller (2), and the input and output of which are coupled to a high-pressure blower (3).

6. The snow removal apparatus of claim 1, wherein, It also includes a fan protection circuit, which is coupled to the high-pressure fan (3).

7. The snow removal apparatus of claim 6, wherein, The wind turbine protection circuit includes an input power module (11), a soft start module (12), and a bypass contactor module (13). The input power module (11) is used to connect to an external power source. The output terminal of the input power module (11) is connected to the soft start module (12) and the bypass contactor module (13) respectively. The soft start module (12) and the bypass contactor module (13) are both coupled to the power supply terminal of the high-pressure blower (3). The soft start module (12) is used to regulate the starting voltage of the high-pressure blower (3). The bypass contactor module (13) is used to switch to direct power supply after the high-pressure blower (3) starts.

8. The snow removal apparatus of claim 7, wherein, The input power module (11) includes a three-phase circuit breaker and an EMI filter. The L1, L2, and L3 input pins of the three-phase circuit breaker are used to connect to an external power supply. The T1, T2, and T3 output pins of the three-phase circuit breaker are connected to the input terminal of the EMI filter. The output terminal of the EMI filter is connected to the anode group of the three-phase thyristors in the soft start module (12). The soft start module (12) includes a three-phase thyristor and a KC04 integrated phase-shift trigger. The cathode group of the three-phase thyristor is connected to the input terminal of the bypass contactor module (13). The output terminal of the KC04 integrated phase-shift trigger is connected to the control electrode of the three-phase thyristor. The input terminal of the KC04 integrated phase-shift trigger is connected to an external power supply. The bypass contactor module (13) includes an AC contactor and a bimetallic strip temperature control switch. The main contact input terminal of the AC contactor is connected to the output terminal of the three-phase thyristor. The U, V, and W output terminals of the AC contactor are connected to the power supply terminal of the high-pressure blower (3).

9. The snow removal apparatus of claim 8, wherein, The fan protection circuit also includes a low temperature start-up optimization module (14), a current monitoring module (15), and an over-temperature protection module (16). The over-temperature protection module (16) includes a bimetallic strip temperature control switch, a PTC thermistor, a temperature control relay, and a cooling fan. The cooling fan is installed inside the casing of the high-pressure blower (3). The coil of the AC contactor is connected to an external power source through the bimetallic strip temperature control switch. One end of the PTC thermistor is grounded, and the other end is connected to the coil of the temperature control relay. The normally open contact of the temperature control relay is connected to the power supply terminal of the cooling fan. The power supply terminal of the temperature control relay and the coil of the temperature control relay are connected. The low-temperature start-up optimization module (14) includes an NTC thermistor and a time delay relay. The NTC thermistor is installed on the high-pressure blower (3). One end of the TC thermistor is connected to the main contact output terminal of the AC contactor, and the other end of the NTC thermistor is connected to the normally closed contact terminal of the time delay relay. One end of the coil of the time delay relay is connected to one end of the coil of the AC contactor, and the other end of the coil of the time delay relay is connected to an external power source. The normally closed contact terminal of the time delay relay is short-circuited to the NTC thermistor. The current monitoring module (15) includes a current transformer, an overcurrent relay, and a circuit breaker. The primary side of the current transformer is connected through the U-phase line of the motor in the high-pressure fan (3). The secondary side of the current transformer is connected to the input terminal of the overcurrent relay. The normally closed contact of the overcurrent relay is connected in series with the trip coil circuit of the three-phase circuit breaker.

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