CN114243613A - Vehicle-mounted microwave-vibration cooperative deicing device and method for electrified railway contact network - Google Patents
Vehicle-mounted microwave-vibration cooperative deicing device and method for electrified railway contact network Download PDFInfo
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
A vehicular microwave-vibration cooperative deicing device for an electrified railway contact network comprises a microwave deicing unit, a vibration deicing unit, a data acquisition unit and a data analysis and control unit; the data acquisition unit acquires the data of the environmental information of the contact network and transmits the acquired environmental information to the data analysis and control unit; the data analysis and control unit analyzes the environmental information to obtain an analysis result and controls the microwave deicing unit and the vibration deicing unit according to the analysis result so that the microwave deicing unit carries out microwave deicing firstly and then vibrates the deicing unit to carry out vibration deicing. A vehicular microwave-vibration cooperative deicing method for an electrified railway contact network comprises the steps of carrying out data acquisition on environmental information of the contact network through a data acquisition unit and transmitting the environmental information to a data analysis and control unit; the data analysis and control unit analyzes the environmental information and controls the microwave deicing unit and the vibration deicing unit.
Description
Technical Field
The invention relates to the field of railway electricity, in particular to a vehicle-mounted microwave-vibration cooperative deicing device and method for an electrified railway contact network.
Background
The electrified railway contact net is exposed outdoors throughout the year and is very easily influenced by freezing, rain and weather. A large amount of icing of the contact network caused by freezing rain can cause a series of problems of line electric leakage, deformation, pantograph damage and the like, and meanwhile, the locomotive can be subjected to unstable power receiving, so that the normal and safe operation of the locomotive is influenced. The problem of icing of the contact net of the electrified railway is absolutely solved effectively.
Aiming at the problem of deicing of a railway overhead line system, in addition to an artificial mechanical beating deicing mode which consumes a large amount of manpower and material resources, the novel deicing technology disclosed in the literature mainly comprises the following modes. Vibrating deicers such as adjustable amplitude, frequency, contact pressure vibrating deicers (CN201510681270.8), pneumatic vibrating (CN201520812209.8, CN 201310457472.5); water-sprayed (cn202110370651. x); burst (201720064893.5); thermal deicing, such as conventional heating wire heating (CN201920498503.4) (CN202011485362.6), short circuit thermal resistance: (CN201910023412.6) and the like. Microwave deicing formula: (CN201710550954.3) and the like. Vehicles on which such apparatuses are mounted generally employ locomotives, unmanned planes (CN201820155901.1), and the like. Because the material of the contact net is generally magnesium-copper alloy, the contact net is in close contact with an ice layer, the binding force is strong, and when the outdoor temperature is low, the deicing efficiency and the implementation effect are not obvious enough only by adopting modes of air injection, water injection and the like. Blasting type deicing needs to be carried out on the outer side of the overhead line system in advance, and the blasting type deicing system is complex in arrangement and installation and cannot be applied for multiple times and is one-time deicing. The electrothermal heating type deicing method needs to consume a large amount of electric energy, can damage a contact net if the control is not good, and is inconvenient to operate. The short-circuit thermal resistance deicing needs to cut off the normal power transmission of a contact network firstly, so that the locomotive stops running and cannot be applied in a large range.
How to reduce the damage to the contact network under the premise of automatic deicing is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a vehicle-mounted microwave-vibration cooperative deicing device and method for an electrified railway contact network, wherein the contact network is not damaged by the method of deicing by microwave firstly and then vibration, the circuit safety is ensured, and the deicing is effectively realized; the automation degree is high, and the labor cost is reduced.
The purpose of the invention is realized by the following technical scheme:
a vehicular microwave-vibration cooperative deicing device for an electrified railway contact network comprises a microwave deicing unit, a vibration deicing unit, a data acquisition unit and a data analysis and control unit;
the microwave deicing unit, the vibration deicing unit and the data acquisition unit are electrically connected with the data analysis and control unit;
the microwave deicing unit is used for carrying out microwave deicing on the contact network under the control of the data analysis and control unit;
the vibration deicing unit is used for vibrating and deicing the contact network under the control of the data analysis and control unit;
the data acquisition unit acquires the data of the environmental information of the contact network and transmits the acquired environmental information to the data analysis and control unit;
the data analysis and control unit analyzes the environmental information to obtain an analysis result and controls the microwave deicing unit and the vibration deicing unit according to the analysis result so that the microwave deicing unit carries out microwave deicing firstly and then vibrates the deicing unit to carry out vibration deicing.
Further, the data analysis and control unit calculates the melting time of the microwave deicing unit for carrying out microwave deicing on the contact net and the vibration parameters of the vibration deicing unit according to the environmental information, and controls the microwave deicing unit and the vibration deicing unit.
Further, the microwave deicing unit comprises a microwave generating module, a microwave focusing module and a position adjusting module;
the microwave generating module generates microwaves, the microwave focusing module focuses the microwaves generated by the microwave generating module on the contact net, and the position adjusting module detects the position of the contact net and adjusts the position of microwave emission according to the position of the contact net.
Further, the microwave generation module comprises an amplifier and a plurality of microwave generators, wherein the microwave generators generate microwaves, and the amplifier amplifies the microwaves.
Further, the microwave generator is connected with a position adjusting structure, and the position adjusting structure adjusts the position of microwave emission;
the position adjusting module comprises a contact net position detecting sensor and a microwave generator displacement controller, the contact net position detecting sensor detects the position of a contact net in real time and sends the position of the contact net to the microwave generator displacement controller, and the microwave generator displacement controller sends a control signal to the position adjusting structure according to the position of the contact net.
Further, the vibration deicing unit comprises a servo motor and a pick-axe type contact rod; the servo motor drives the axe-type contact rod to move up and down to knock the contact net;
the servo motor can adjust the rotating speed according to the control instruction of the data analysis and control unit.
A vehicular microwave-vibration cooperative deicing method for an electrified railway contact network comprises the following steps:
s1: the data acquisition unit is used for acquiring the data of the environmental information of the contact network and transmitting the acquired environmental information to the data analysis and control unit;
s2: the data analysis and control unit analyzes the environmental information to obtain an analysis result and controls the microwave deicing unit and the vibration deicing unit according to the analysis result so that the microwave deicing unit carries out microwave deicing firstly and then vibrates the deicing unit to carry out vibration deicing.
Further, the step S2 includes the following sub-steps:
s201: the data analysis and control unit calculates the melting time of the microwave deicing unit for carrying out microwave deicing on the contact network according to the environmental information;
s202: the data analysis and control unit starts the microwave deicing unit to perform microwave deicing according to the melting time of the microwave deicing unit for performing microwave deicing on the contact network, which is obtained through calculation;
s203: after the time for the microwave deicing unit to perform microwave deicing reaches the melting time for the microwave deicing unit to perform microwave deicing on the contact network, the data analysis and control unit performs calculation and analysis according to the environmental information to obtain the vibration parameters of the vibration deicing unit and starts the vibration deicing unit to perform vibration deicing according to the vibration parameters of the vibration deicing unit.
Further, the calculation formula of the melting time of the microwave deicing unit for performing microwave deicing on the contact network is as follows:
in the formula, t is melting time; j' is total Joule heat; eta1Is the electric heating coupling power; p is the total power of the microwave generator; τ is the microwave transmittance in ice;
the total joule heating is calculated as:
wherein J' is total Joule heating; j is actual Joule fever; eta is the microwave heat transfer efficiency;
the actual joule heating is calculated as:
J＝cρπr2LΔT
wherein J is actual Joule fever; c is the specific heat capacity of ice; rho is the density of the ice layer; r is the microwave action radius; l is the distance of the microwave penetrating the ice layer; Δ T is the temperature difference;
the calculation formula of the microwave heat transfer efficiency is as follows:
wherein eta is the microwave heat transfer efficiency; d is the thickness of the heating ice layer; d is the microwave heat transfer depth;
the calculation formula of the microwave heat transfer depth is as follows:
in the formula, D is the microwave heat transfer depth; λ is the center wavelength; tan μ is the dielectric loss tangent; ε is the relative dielectric constant of ice.
Further, the sub-step S202 includes the steps of:
(1) starting a position adjusting module of the microwave deicing unit, detecting the position of a contact net by a contact net position detecting sensor of the position adjusting module, and sending the position of the contact net to a microwave generator displacement controller of the position adjusting module;
(2) the microwave generator displacement controller adjusts the position of microwave emission according to the position of a contact net;
(3) and starting a microwave generating module and a microwave focusing module of the microwave deicing unit, generating microwaves by the microwave generating module, and focusing the microwaves on the contact net by the microwave focusing module.
The invention has the beneficial effects that:
by the method of deicing by microwave and then vibrating for deicing, the contact network is not damaged, the safety of the line is ensured, and the deicing is effectively realized; the automation degree is high, and the labor cost is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top plan view of the present invention on a locomotive;
FIG. 3 is a schematic diagram of a microwave deicing unit mechanism;
FIG. 4 is a schematic diagram of the calculation of the microwave generator displacement controller;
FIG. 5 is a schematic diagram of a microwave generator;
FIG. 6 is a schematic mechanical view of a vibratory deicing unit;
FIG. 7 is a flow chart of the present invention.
In the figure, 1-a contact network, 2-a locomotive, 3-a microwave generator, 4-a vibration deicing unit, 5-a data analysis and control unit, 6-a contact network position detection sensor, 7-a microwave generator displacement controller, 8-a slide rail, 9-a position adjusting module, 10-a microwave focusing module, 11-a magnetron, 12-a high-voltage diode, 13-a waveguide amplifier, 14-a support rod, 15-a microwave deicing unit, 16-a servo motor, 17-a pick-axe type contact rod, 18-a data calculation analysis module and 19-a control instruction output module.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The first embodiment is as follows:
as shown in fig. 1 to 7, a vehicle-mounted microwave-vibration cooperative deicing device for an electrified railway contact network 1,
the device comprises a microwave deicing unit 15, a vibration deicing unit 4, a data acquisition unit and a data analysis and control unit 5;
the microwave deicing unit 15, the vibration deicing unit 4 and the data acquisition unit are electrically connected with the data analysis and control unit 5;
the microwave deicing unit 15 performs microwave deicing on the contact network 1 under the control of the data analysis and control unit 5;
the vibration deicing unit 4 is used for performing vibration deicing on the contact network 1 under the control of the data analysis and control unit 5;
the data acquisition unit acquires the data of the environmental information of the contact network 1 and transmits the acquired environmental information to the data analysis and control unit 5;
the data analysis and control unit 5 analyzes the environmental information to obtain an analysis result, and controls the microwave deicing unit 15 and the vibration deicing unit 4 according to the analysis result, so that the microwave deicing unit 15 performs microwave deicing first and then the vibration deicing unit 4 performs vibration deicing.
The data analysis and control unit 5 calculates the melting time of the microwave deicing unit 15 for performing microwave deicing on the contact network 1 and the vibration parameters of the vibration deicing unit 4 according to the environmental information, and controls the microwave deicing unit 15 and the vibration deicing unit 4.
The vibration deicing unit 4 and the data analysis and control unit 5 carry out information interaction.
A vehicle-mounted microwave-vibration cooperative deicing device for an electrified railway contact network 1 is arranged on the top of a locomotive 2.
A vehicular microwave-vibration cooperative deicing device for an electrified railway contact network 1 utilizes a locomotive 2 for power supply.
The locomotive 2 is a vehicle and an energy supply unit. The length of a single car of the locomotive 2 is about 25.4 m.
The microwave deicing unit 15 and the vibration deicing unit 4 deice in cooperation.
The microwave deicing unit 15 includes a microwave generation module, a microwave focusing module 10, and a position adjustment module 9.
The microwave generating module generates microwaves, the microwave focusing module 10 focuses the microwaves generated by the microwave generating module on the contact net 1, and the position adjusting module 9 detects the position of the contact net 1 and adjusts the position of microwave emission according to the position of the contact net 1.
The microwave generation module comprises an amplifier and a plurality of microwave generators 3, wherein the microwave generators 3 generate microwaves, and the amplifier amplifies the microwaves.
The microwave generators 3 are arranged in the traveling direction of the locomotive 2.
The microwave generator 3 includes a magnetron 11 and a high voltage diode 12.
The amplifier is a waveguide amplifier 13, and the waveguide amplifier 13 amplifies the power of the microwave generated by the microwave generator 3, so that the generated microwave meets the deicing requirement.
The microwave focusing module 10 is installed at the emission port of the microwave generator 3.
The microwave focusing module 10 focuses microwaves on the contact net 1, and the microwave focusing module 10 is made of aluminum alloy materials.
The microwave deicing unit 15 adopts 5 groups of microwave generators 3, the inspection speed of the locomotive 2 is generally 3m/s, the microwave power generated by the five groups of microwave generators 3 is 5000W, and the frequency is 5.8 GHz.
The microwave generator 3 is mounted on top of the locomotive 2. The contact net 1 is arranged above the locomotive 2, the contact net 1 is made of copper-magnesium alloy, the diameter of the contact net 1 is 16mm, the contact net can be suspended above the locomotive 2 through a suspension line, and the five groups of microwave generators 3 are placed 1 meter below the contact line.
The situation shown in fig. 4 is a certain operating condition. Under actual working conditions, the contact net 1 is arranged in a Z shape.
Research shows that when the microwave technology is used for deicing, the capacity of an ice layer for absorbing microwaves is not strong, the temperature change of the ice layer is not obvious, the wave absorbing capacity of a contact net is far greater than that of the ice layer, the temperature of the contact surface of the contact net and the ice layer is increased, the binding force between the contact net and the ice layer is effectively reduced, and therefore the ice layer and the contact net can be effectively separated. Experimental tests show that 7mm ice layer loosening can be caused by 5s under the microwave action with the frequency of 5.8GHz and the power of 5 kW.
The analysis result includes the melting time of the microwave deicing unit 15 for microwave deicing of the contact net 1.
The calculation formula of the melting time of the microwave deicing unit 15 for performing microwave deicing on the contact network 1 is as follows:
in the formula, t is melting time; j' is total Joule heat; eta1The value is 0.52 for the electrothermal coupling power; p is the total power of the microwave generator 3; tau is the transmittance of the microwave in the ice and takes a value of 0.28;
the total joule heating is calculated as:
wherein J' is total Joule heating; j is actual Joule fever; eta is the microwave heat transfer efficiency;
the actual joule heating is calculated as:
J＝cρπr2LdT
wherein J is actual Joule fever; c is the specific heat capacity of ice, and the value is 2.1J/(g ℃); rho is the density of the ice layer and is 0.9g/cm 3; r is the microwave action radius; l is the distance of the microwave penetrating the ice layer; delta T is the temperature difference and takes the value of 20 ℃;
the calculation formula of the microwave heat transfer efficiency is as follows:
wherein eta is the microwave heat transfer efficiency; d is the thickness of the heating ice layer, and the value is 7 mm; d is the microwave heat transfer depth;
the calculation formula of the microwave heat transfer depth is as follows:
in the formula, D is the microwave heat transfer depth; lambda is the central wavelength and takes the value of 0.0052 m; tan mu is dielectric loss tangent, and the value is 0.009; epsilon is the relative dielectric constant of ice, and takes a value of 3.2.
It is known that 5000W of microwave acts on a 7mm ice layer, and the ice layer is loosened by continuously heating for 5 seconds.
Each set of microwave generators 3 is spaced 3 meters apart. Five sets of microwave generators 3 are placed at the top of the same carriage, so that when the locomotive 2 runs, the microwave generators 3 can continuously heat the ice layer of the contact net 1, and the deicing effect is achieved.
The microwave generator 3 is connected with a position adjusting structure, and the position adjusting structure adjusts the position of microwave emission.
The position adjustment structure comprises slide rails which adjust the distance between the microwave generators 3.
According to the actual working condition, when the power of the microwave generators 3 needs to be adjusted, the distance between the groups of microwave generators 3 is adjusted through the slide rails, and therefore the ideal deicing effect is achieved.
The position adjusting module 9 comprises a contact net position detecting sensor 6 and a microwave generator displacement controller 7, the contact net position detecting sensor 6 detects the position of the contact net 1 in real time and sends the position of the contact net 1 to the microwave generator displacement controller 7, and the microwave generator displacement controller 7 sends a control signal to a position adjusting structure, namely a sliding rail at the bottom of the microwave generator 3 according to the position of the contact net 1, so that the position of microwave emission is adjusted.
The contact net position detection sensor 6 is installed on the roof of the locomotive 2.
The position of the contact net 1 comprises the horizontal position offset of the contact net 1;
when the locomotive 2 runs, the horizontal position of the contact net 1 deviates, and at the moment, the position of the microwave generator 3 is adjusted in real time.
The microwave generator displacement controller 7 calculates the horizontal displacement required by the microwave generator 3 according to the position of the overhead line system 1 according to the following formula:
tanλ＝L/Y
Y＝L/tanλ
R＝Y-X＝L/tanλ-X
in the formula, λ is a deflection angle, L is a vertical distance between the catenary position detection sensor 6 and the position adjustment structure, and X is a horizontal distance between a detection position of the catenary position detection sensor 6 and a central position thereof; y is the horizontal distance between the detection position of the contact net position detection sensor 6 and the position of the microwave generator 3; r is the amount of horizontal displacement required by the microwave generator 3, as shown in fig. 4.
Through position control module 9 and position control structure, realize that the microwave is to the continuous heating of tracking formula of contact net 1, can adjust in real time in order to ensure the effective transmission distance between a plurality of microwave generator 3 and contact net 1, and then improve the efficiency of the deicing of microwave deicing unit 15.
The vibration deicing unit 4 comprises a servo motor 16 and a pick-axe type contact rod 17; the servo motor 16 drives the axe-type contact rod 17 to move up and down to knock the contact net 1.
The servo motor 16 can adjust the rotating speed according to the control instruction of the data analysis and control unit 5.
The axe-type contact rod 17 is made of resin insulating materials.
The vibration deicing unit 4 is disposed behind the microwave deicing unit 15 with respect to the traveling direction of the locomotive 2, and deicing is performed in cooperation with the microwave generator 3.
One end of the vibration deicing unit 4 is fixed on a support rod 14, the support rod 14 is arranged on the roof of the locomotive 2, and when the vibration deicing unit 4 works, the support rod 14 lifts the vibration deicing unit 4 to a certain height; and a pickaxe type contact rod 17 is installed at the other end of the vibration deicing unit 4, and the deicing action is completed along with the movement of the pickaxe type contact rod 17.
The data analysis and control unit 5 controls the servo motor 16 to enable the axe-type contact rod 17 to make a semi-circular motion around a fixed point, so that the overhead contact system 1 above is covered with ice to complete mechanical knocking, the aim of deicing is further achieved, and the vibration deicing unit 4 is effectively controlled.
The data analysis and control unit 5 comprises a data calculation and analysis module 18 and a control instruction output module 19;
the data calculation and analysis module 18 analyzes according to the environmental information to obtain an analysis result; and the control instruction output module 19 controls the microwave deicing unit 15 and the vibration deicing unit 4 according to the analysis result.
The environment information comprises the advancing speed of the locomotive 2, the average thickness of an ice layer of the contact network 1 and microwave transmitting power; the vibration parameters of the vibrating deicing unit 4 of the analysis result include an optimum rotation speed range of the servo motor 16. The control instruction output module 19 outputs the optimum rotation speed range to the servo motor 16.
A vehicle-mounted microwave-vibration cooperative deicing method for an electrified railway contact network 1 comprises the following steps:
s1: the data acquisition unit acquires the environmental information of the contact network 1 and transmits the acquired environmental information to the data analysis and control unit 5;
s2: the data analysis and control unit 5 analyzes the environmental information to obtain an analysis result and controls the microwave deicing unit 15 and the vibration deicing unit 4 according to the analysis result, so that the microwave deicing unit 15 performs microwave deicing firstly and then the vibration deicing unit 4 performs vibration deicing;
s201: the data analysis and control unit 5 calculates the melting time of the microwave deicing unit 15 for performing microwave deicing on the contact network 1 according to the environmental information;
the environmental information includes a thickness of a heating ice layer, etc. The analysis result includes the melting time of the microwave deicing unit 15 for performing microwave deicing on the contact net 1.
The calculation formula of the melting time of the microwave deicing unit 15 for performing microwave deicing on the contact network 1 is as follows:
in the formula, t is melting time; j' is total Joule heat; eta1The value is 0.52 for the electrothermal coupling power; p is the total power of the microwave generator 3; tau is the transmittance of the microwave in the ice and takes a value of 0.28;
the total joule heating is calculated as:
wherein J' is total Joule heating; j is actual Joule fever; eta is the microwave heat transfer efficiency;
the actual joule heating is calculated as:
J＝cρπr2LΔT
wherein J is actual Joule fever; c is the specific heat capacity of ice, and the value is 2.1J/(g ℃); rho is the density of the ice layer and is 0.9g/cm3(ii) a r is the microwave action radius; l is the distance of the microwave penetrating the ice layer; delta T is the temperature difference and takes the value of 20 ℃;
the calculation formula of the microwave heat transfer efficiency is as follows:
wherein eta is the microwave heat transfer efficiency; d is the thickness of the heating ice layer, and the value is 7 mm; d is the microwave heat transfer depth;
the calculation formula of the microwave heat transfer depth is as follows:
in the formula, D is the microwave heat transfer depth; lambda is the central wavelength and takes the value of 0.0052 m; tan mu is dielectric loss tangent, and the value is 0.009; epsilon is the relative dielectric constant of ice, and takes a value of 3.2.
S202: the data analysis and control unit 5 starts the microwave deicing unit 15 to perform microwave deicing according to the melting time of the microwave deicing unit 15 obtained by calculation for performing microwave deicing on the contact network 1;
(1) starting a position adjusting module 9 of the microwave deicing unit 15, detecting the position of the overhead line system 1 by an overhead line system position detecting sensor 6 of the position adjusting module 9, and sending the position of the overhead line system 1 to a microwave generator displacement controller 7 of the position adjusting module 9;
(2) the microwave generator displacement controller 7 adjusts the position of microwave emission according to the position of the overhead line system 1 so as to ensure the effective emission distance between the plurality of microwave generators 3 and the overhead line system 1.
And the microwave generator displacement controller 7 sends a control signal to the position adjusting structure according to the position of the overhead line system 1, and the position adjusting structure adjusts the position of microwave emission.
(3) Starting a microwave generating module and a microwave focusing module 10 of the microwave deicing unit 15, generating microwaves by the microwave generating module, and focusing the microwaves on the contact net 1 by the microwave focusing module 10; the ice bag between the contact surface of the ice layer and the contact net 1 is melted and loosened, the binding force is reduced, and preliminary deicing is realized through microwave deicing;
the microwave generation module generates microwaves through a magnetron 11 and a high-voltage diode 12, and generates the microwaves after the microwaves are amplified by a waveguide amplifier 13;
focusing the microwave on the contact net 1 by the microwave focusing module 10 to realize microwave heating of the contact net 1;
when the locomotive 2 advances, a plurality of microwave generators 3 can continuously act on the local position of the contact net 1 with the microwave, and the sufficient microwave heating effect of the local position is ensured.
S203: after the time duration of the microwave deicing unit 15 for microwave deicing reaches the melting time of the microwave deicing unit 15 for microwave deicing on the contact network 1, the data analysis and control unit 5 performs calculation and analysis according to the environmental information to obtain the vibration parameters of the vibration deicing unit 4 and starts the vibration deicing unit 4 to perform vibration deicing according to the vibration parameters of the vibration deicing unit 4.
The data analysis and control unit 5 performs calculation and analysis according to the environmental information to obtain the optimal rotating speed range n of the servo motor 16 of the vibration deicing unit 41-n2The control instruction output module 19 outputs the optimal rotating speed range to the servo motor 16;
the environment information comprises the advancing speed of the locomotive 2, the average thickness of an ice layer of the contact network 1 and microwave transmitting power; the analysis result includes an optimum rotational speed range of the servo motor 16.
And the servo motor 16 adjusts the current rotating speed value according to the optimal rotating speed range, and starts the vibration deicing unit 4 to perform vibration deicing.
The vibration deicing unit 4 knocks the ice layer loosened by microwave heating to realize microwave-vibration cooperative deicing.
The deicing method solves the problems that the existing deicing method for the railway contact network is low in automation degree, low in working efficiency, capable of influencing locomotive operation, damaging the contact network, high in energy consumption and the like.
The microwave deicing unit 15 utilizes the characteristics that the contact net 1 has stronger microwave absorbing capability than an ice layer and is easy to heat, so that the temperature of a contact surface is increased, a local ice layer is melted, and the binding force between the contact net 1 and the contact surface of an ice bag is reduced, so that the ice layer is loosened.
The advantages of the microwave technology and the vibration deicing technology are combined, the locomotive is used as a carrier, the microwave deicing unit and the vibration deicing unit are carried, the microwaves generated by the microwave deicing unit continuously act on an icing contact net in the locomotive running process, and efficient deicing is realized through the cooperation of microwave ice loosening and vibration ice knocking.
Firstly, the microwave cannot damage the contact net 1 or other equipment, the boiling point of ice water substances is 100 ℃ under the standard atmospheric pressure, the contact net 1 is mostly made of silver-copper alloy at present, the softening point is 300 ℃, and the metal material has the reflection effect on the microwave and has ice layer separation, so that electric sparks cannot be generated, and the safety of circuits and devices is ensured; secondly, the energy received by the local area of the contact net 1 is effectively ensured by utilizing the continuous action of a plurality of microwave generators 3; finally, the microwave technology and the vibration deicing are combined, the advantages of the two technologies are fully exerted, the continuous deicing in the advancing process of the locomotive 2 can be realized, and the safety and the high efficiency of construction operation are ensured.
By the method of deicing by microwave and then vibrating for deicing, the contact network is not damaged, the safety of the line is ensured, and the deicing is effectively realized; the automation degree is high, and the labor cost is reduced.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. The utility model provides an electronic railway connecting net vehicular microwave-vibration is defroster in coordination which characterized in that: the device comprises a microwave deicing unit, a vibration deicing unit, a data acquisition unit and a data analysis and control unit;
the microwave deicing unit, the vibration deicing unit and the data acquisition unit are electrically connected with the data analysis and control unit;
the microwave deicing unit is used for carrying out microwave deicing on the contact network under the control of the data analysis and control unit;
the vibration deicing unit is used for vibrating and deicing the contact network under the control of the data analysis and control unit;
the data acquisition unit acquires the data of the environmental information of the contact network and transmits the acquired environmental information to the data analysis and control unit;
the data analysis and control unit analyzes the environmental information to obtain an analysis result and controls the microwave deicing unit and the vibration deicing unit according to the analysis result so that the microwave deicing unit carries out microwave deicing firstly and then vibrates the deicing unit to carry out vibration deicing.
2. The vehicular microwave-vibration cooperative deicing device for the overhead contact system of the electrified railway according to claim 1, characterized in that: and the data analysis and control unit calculates the melting time of the microwave deicing unit for carrying out microwave deicing on the contact network and the vibration parameters of the vibration deicing unit according to the environmental information, and controls the microwave deicing unit and the vibration deicing unit.
3. The vehicular microwave-vibration cooperative deicing device for the overhead line system of the electrified railway according to claim 1 or 2, characterized in that: the microwave deicing unit comprises a microwave generating module, a microwave focusing module and a position adjusting module;
the microwave generating module generates microwaves, the microwave focusing module focuses the microwaves generated by the microwave generating module on the contact net, and the position adjusting module detects the position of the contact net and adjusts the position of microwave emission according to the position of the contact net.
4. The vehicular microwave-vibration cooperative deicing device for the overhead contact system of the electrified railway according to claim 3, characterized in that: the microwave generation module comprises an amplifier and a plurality of microwave generators, wherein the microwave generators generate microwaves, and the amplifier amplifies the microwaves.
5. The vehicular microwave-vibration cooperative deicing device for the overhead contact system of the electrified railway according to claim 4, characterized in that: the microwave generator is connected with a position adjusting structure, and the position adjusting structure adjusts the position of microwave emission;
the position adjusting module comprises a contact net position detecting sensor and a microwave generator displacement controller, the contact net position detecting sensor detects the position of a contact net in real time and sends the position of the contact net to the microwave generator displacement controller, and the microwave generator displacement controller sends a control signal to the position adjusting structure according to the position of the contact net.
6. The vehicular microwave-vibration cooperative deicing device for the overhead line system of the electrified railway according to claim 1 or 2, characterized in that: the vibration deicing unit comprises a servo motor and a pick-axe type contact rod; the servo motor drives the axe-type contact rod to move up and down to knock the contact net;
the servo motor can adjust the rotating speed according to the control instruction of the data analysis and control unit.
7. A vehicle-mounted microwave-vibration cooperative deicing method for an electrified railway contact network is characterized by comprising the following steps: the method comprises the following steps:
s1: the data acquisition unit is used for acquiring the data of the environmental information of the contact network and transmitting the acquired environmental information to the data analysis and control unit;
s2: the data analysis and control unit analyzes the environmental information to obtain an analysis result and controls the microwave deicing unit and the vibration deicing unit according to the analysis result so that the microwave deicing unit carries out microwave deicing firstly and then vibrates the deicing unit to carry out vibration deicing.
8. The vehicular microwave-vibration cooperative deicing method for the overhead contact system of the electrified railway according to claim 7, characterized in that: the step S2 includes the following sub-steps:
s201: the data analysis and control unit calculates the melting time of the microwave deicing unit for carrying out microwave deicing on the contact network according to the environmental information;
s202: the data analysis and control unit starts the microwave deicing unit to perform microwave deicing according to the melting time of the microwave deicing unit for performing microwave deicing on the contact network, which is obtained through calculation;
s203: after the time for the microwave deicing unit to perform microwave deicing reaches the melting time for the microwave deicing unit to perform microwave deicing on the contact network, the data analysis and control unit performs calculation and analysis according to the environmental information to obtain the vibration parameters of the vibration deicing unit and starts the vibration deicing unit to perform vibration deicing according to the vibration parameters of the vibration deicing unit.
9. The vehicular microwave-vibration cooperative deicing method for the overhead contact system of the electrified railway according to claim 8, characterized in that: the calculation formula of the melting time of the microwave deicing unit for carrying out microwave deicing on the contact network is as follows:
in the formula, t is melting time; j' is total Joule heat; eta1Is the electric heating coupling power; p is the total power of the microwave generator; τ is the microwave transmittance in ice;
the total joule heating is calculated as:
wherein J' is total Joule heating; j is actual Joule fever; eta is the microwave heat transfer efficiency;
the actual joule heating is calculated as:
J＝cρπr2LΔT
wherein J is actual Joule fever; c is the specific heat capacity of ice; rho is the density of the ice layer; r is the microwave action radius; l is the distance of the microwave penetrating the ice layer; Δ T is the temperature difference;
the calculation formula of the microwave heat transfer efficiency is as follows:
wherein eta is the microwave heat transfer efficiency; d is the thickness of the heating ice layer; d is the microwave heat transfer depth;
the calculation formula of the microwave heat transfer depth is as follows:
in the formula, D is the microwave heat transfer depth; λ is the center wavelength; tan μ is the dielectric loss tangent; ε is the relative dielectric constant of ice.
10. The vehicular microwave-vibration cooperative deicing method for the overhead contact system of the electrified railway according to claim 8, characterized in that: the substep S202 comprises the steps of:
(1) starting a position adjusting module of the microwave deicing unit, detecting the position of a contact net by a contact net position detecting sensor of the position adjusting module, and sending the position of the contact net to a microwave generator displacement controller of the position adjusting module;
(2) the microwave generator displacement controller adjusts the position of microwave emission according to the position of a contact net;
(3) and starting a microwave generating module and a microwave focusing module of the microwave deicing unit, generating microwaves by the microwave generating module, and focusing the microwaves on the contact net by the microwave focusing module.
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