CN106080650A - A kind of gas brak control unit used for rail vehicle - Google Patents
A kind of gas brak control unit used for rail vehicle Download PDFInfo
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- CN106080650A CN106080650A CN201610705109.4A CN201610705109A CN106080650A CN 106080650 A CN106080650 A CN 106080650A CN 201610705109 A CN201610705109 A CN 201610705109A CN 106080650 A CN106080650 A CN 106080650A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention provides a kind of gas brak control unit used for rail vehicle, it includes nine pressure measuring tie-ins of pressure in detecting corresponding pipeline, for the pressure signal in corresponding pipeline being converted to the signal of telecommunication four pressure transducers exported, being used for detecting the pressure in pipeline, show, report to the police, control output, to guarantee properly functioning two pressure switch of whole gas brak control unit used for rail vehicle, for controlling aerofluxus or the relay valve of inflation according to internal pressure change.Integration degree of the present invention is high, control accuracy is high, stability good, improves safe performance indexes and the maintainability index of brakes, and the safety of simultaneity factor is high.
Description
Technical field
The present invention relates to field of track traffic, in particular it relates to a kind of gas brak control unit used for rail vehicle.
Background technology
Gas brak control unit is a nucleus module of rail vehicle braking system, especially city rail vehicle and EMUs
The pneumatic control core component of train braking system, its Main Function is that braking instruction is converted into corresponding brake pressure, control
System to unit brake is braked alleviation.
Gas brak control unit is an electricity, gas Logic control module, and its performance directly decides braking control system energy
No stable, accurate, realize the control of brake force reliably, train operating safety is played vital effect.
Patent publication No. is the open a kind of EMU of Chinese invention patent and the city rail traffic of CN 103010251 A
Vehicle brak control unit, including EP (control pilot valve) valve, pop valve, empty and load brake regulator and relay valve, it is possible to realize checking cylinder pressure
The ratio output of power, and connected by internal duct between each valve, internal duct is integrated on gas circuit base plate, has higher
Interchangeability and maintainability, but it has the disadvantage in that as single brake-cylinder pressure output mode, does not meet EMUs
The function of different brake-cylinder pressures is exported under different operating modes；Non-relay valve failover backup function, owing to relay valve is frequent
Action component, once breaks down, and has a strong impact on the operation safety of train, and such as pre-control signal pressure chamber diaphragm damages or disconnected
Splitting, relay valve loses the ability of brake pressure output；Non-relay valve fault or other reasons cause cannot alleviate brake-cylinder pressure
Time, needing to be manually operated the alleviation being braked cylinder, operation is inconvenient and dangerous；Backup functionality without pop valve, above-mentioned system
Dynamic control unit, when pop valve fault, can lose all brake control pressures, and the operation to vehicle causes safely great prestige
The side of body.
Patent publication No. is that the Chinese invention patent of CN 104260745 A discloses a kind of EMUs brak control unit,
Including the gas brak control unit being integrated within same brake cabinet and electronic brake control unit, in its gas brak control unit
Relay valve use double pre-control relay valve, EP valve module connects service braking pre-control pressure port, and it is pre-that pop valve connects brake hard
Governor pressure mouth, adds the Safety Redundancy of system, additionally have employed and remotely force mitigation capability, force alleviation operation at needs
Time directly brake-cylinder pressure is remotely alleviated by the switch being arranged on train, the operation effectively reducing system is complicated
Property, improve the maintainability of system, but it still has the disadvantage in that without pop valve backup functionality, above-mentioned control for brake list
Unit, when pop valve fault, can lose all brake control pressures, and the operation to vehicle causes safely threat greatly；Non-relay
The pre-governor pressure of valve drastically reduce or disappear in the case of backup functionality, this function is Safety Redundancy function, this Safety Redundancy
Menu is present: a kind of situation is when relay valve pre-control signal pressure loine pressure is reduced rapidly to zero, and relay valve still has pressure
Output, it is ensured that the braking function that train is basic, another kind of situation is that the diaphragm in relay valve pre-control signal pressure chamber damages or fracture,
Pre-governor pressure the most quickly enters in the middle of air, and relay valve still has pressure to export, it is ensured that the brake riggings function of train；Without directly
Connect electric pneumatic breaking control malfunctioning in the case of, use the function of the pressure interface indirectly controlled, reduce the Safety Redundancy of system
Property.
Summary of the invention
For defect of the prior art, it is an object of the invention to provide a kind of gas brak control unit used for rail vehicle,
Its integration degree is high, control accuracy is high, stability good, and is provided with multiple Safety Redundancy, improves the safety of brakes
Performance indications and maintainability index, the safety that simultaneously improve system is high.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of gas control for brake used for rail vehicle
Unit, it is characterised in that comprising:
Multiple pressure measuring tie-ins, are placed on the pipeline of gas circuit base plate, the pressure in detecting corresponding pipeline；
Multiple pressure transducers, are placed on the pipeline of gas circuit base plate, for by the pressure signal conversion in corresponding pipeline
For the signal of telecommunication and export；
Multiple pressure switches, are placed on the pipeline of gas circuit base plate, for the pressure in pipeline being detected, showing,
Report to the police, control output, to guarantee the properly functioning of whole gas brak control unit used for rail vehicle；
Relay valve, is placed on gas circuit base plate, controls aerofluxus or inflation for the change according to pre-governor pressure.
Preferably, described gas brak control unit used for rail vehicle include pilot solenoid valve, air relief valve, Pneumatic valve, first
Double check valve, cutout cock, equalizing valve, relay valve, the second double check valve, empty and load brake regulator, throttle orifice, multiple pressure measuring tie-ins
It is that the first pressure measuring tie-in, the second pressure measuring tie-in, the 3rd pressure measuring tie-in, the 4th pressure measuring tie-in, the 5th pressure measuring tie-in, the 6th pressure measurement connect
Head, the 7th pressure measuring tie-in, the 8th pressure measuring tie-in, the 9th pressure measuring tie-in, multiple pressure transducers be the first pressure transducer, second
Pressure transducer, the 3rd pressure transducer, the 4th pressure transducer, multiple pressure switches are the first pressure switch, the second pressure
Switch, the IN mouth of pilot solenoid valve and the R1 mouth of the second wind regime be connected, the R2 mouth phase of the OUT port of pilot solenoid valve and relay valve
Even, the first pressure switch is connected on the pipeline between pilot solenoid valve and relay valve, and three total wind pressures of relay valve connect
The R mouth of pipeline and the first wind regime that mouth R3 mouth, R4 mouth, R5 mouth all pass through inside is connected, the C mouth of relay valve and the C1 mouth of checking cylinder
Be connected, on the pipeline between the C mouth and the C1 mouth of checking cylinder of relay valve and be connected to the 4th pressure transducer, the 9th pressure measurement connects
Head, the second pressure switch, the first pressure measuring tie-in and the first pressure transducer are all connected to the R of the first wind regime by internal pipeline
On mouth, the IN mouth of air relief valve and the R mouth of the first wind regime are connected, and the OUT port of air relief valve is connected with the IN mouth of Pneumatic valve, the second pressure measurement
Joint is connected between air relief valve and the pipeline of Pneumatic valve, and the OUT port of Pneumatic valve and the IN1 mouth of the first double check valve are connected,
3rd pressure measuring tie-in is connected on the pipeline between the OUT port of Pneumatic valve and the IN1 mouth of the first double check valve, first two-way only
The IN2 mouth returning valve is connected with the OUT port of equalizing valve and pipe between IN2 mouth and the OUT port of equalizing valve of the first double check valve
On road and connect a pipeline being connected with the T mouth of Pneumatic valve, the IN3 mouth of equalizing valve and the R mouth of the first wind regime be connected, equalizing valve
IN1 mouth, the IN2 mouth of equalizing valve are connected with T1 mouth, the T2 mouth of sky spring pressure of empty spring pressure respectively, and the 4th pressure measuring tie-in is connected to
On pipeline between IN1 mouth and the T1 mouth of empty spring pressure of equalizing valve, the 5th pressure measuring tie-in is connected to IN2 mouth and the sky of equalizing valve
On pipeline between the T2 mouth of spring pressure, the OUT port of the first double check valve is connected with the IN mouth of cutout cock, cutout cock
OUT port is connected with the T mouth of empty and load brake regulator, between OUT port and the T mouth of empty and load brake regulator of cutout cock and be connected to the 3rd pressure sensing
Device, the 8th pressure measuring tie-in, throttle orifice, the OUT port of empty and load brake regulator is connected with the T mouth of relay valve, and the 6th pressure measuring tie-in is connected to sky
Between OUT port and the T mouth of relay valve of loaded vehicle valve, the IN1 mouth of empty and load brake regulator and the OUT port of the second double check valve are connected, the
The IN2 mouth of two double check valves is connected with the EPout mouth of relay valve, the IN1 mouth of the second double check valve and indirect brake interface
DV mouth be connected, between the IN1 mouth of the second double check valve and the DV mouth of indirect brake interface and be connected to the second pressure sensing
Device, the 7th pressure measuring tie-in.
Preferably, described relay valve includes adjusting air valve, relaying air valve, emergency backup valve, urgent electromagnetic valve, braking electromagnetism
Valve, release electromagnetic valve, relay valve pressure transducer, long-range release electromagnetic valve, remotely alleviate air valve, adjusting air valve and relay valve
R2 mouth is connected, and the two ends of relaying air valve are connected with the R3 mouth of relay valve and the T mouth of relay valve respectively, the IN1 mouth of emergency backup valve
Being connected with the R4 mouth of relay valve, the OUT port of emergency backup valve is connected with the EPout mouth of relay valve, the IN1 mouth of urgent electromagnetic valve with
The IN1 mouth of emergency backup valve is connected, and the OUT port of urgent electromagnetic valve is connected with the OUT port of emergency backup valve, urgent electromagnetic valve
IN2 mouth is connected with the OUT port of braking electromagnetic valve, the IN mouth of release electromagnetic valve, and relay valve pressure transducer is connected to urgent electromagnetism
The IN2 mouth of valve, the OUT port of braking electromagnetic valve, release electromagnetic valve IN mouth between pipeline on, long-range release electromagnetic valve and relaying
The R2 mouth of valve, remotely alleviation air valve are connected, and remotely alleviate air valve and are connected with relaying air valve, the C mouth of relay valve.
Preferably, described gas brak control unit used for rail vehicle is positioned on gas circuit base plate, the inside of described gas circuit base plate
Being drilled with gas circuit hole, described gas circuit base plate also includes keyset, also is provided with gas circuit hole inside described keyset, is externally screwed hole,
In order to connect outside gas circuit and output pressure to external system, described keyset is positioned at the valve installed surface of described gas circuit base plate
The back side.
Preferably, the back side of described gas circuit base plate is additionally provided with electric connector.
Preferably, described gas circuit base plate is provided with installation screwed hole and the installation screw thread of pressure measuring tie-in of pressure transducer
Hole, the peripheral side of described gas circuit base plate is provided with the screwed hole installing screw plug, and described keyset is provided with six external spiral shells
Stricture of vagina interface, be respectively the first wind regime interface, the second wind regime interface, the TI mouth interface of empty spring pressure, the T2 mouth interface of empty spring pressure,
The C1 mouth interface of checking cylinder, indirect brake pressure DV mouth interface.
Preferably, described first pressure transducer, described second pressure transducer, described 3rd pressure transducer, described
The interface of the 4th pressure transducer is all external thread form, and working pressure range is all 0-10bar.
Preferably, described first pressure measuring tie-in, described second pressure measuring tie-in, described 3rd pressure measuring tie-in, described 4th survey
Crimp head, described 5th pressure measuring tie-in, described 6th pressure measuring tie-in, described 7th pressure measuring tie-in, described 8th pressure measuring tie-in, institute
Stating the 9th pressure measuring tie-in is all externally threaded connected mode, is designed with dust cap, and side is designed with dust cap ejector button, is all
Manual one-way valve structure, after corresponding plug presses down, can derive internal pressure.
Compared with prior art, the present invention has following beneficial effect: each duty valve block of the present invention is installed concentratedly
On one piece of gas path plate, carrying out logical combination by inner air path passage, integration degree is high, control accuracy is high, stability good, carries
The safe performance indexes of high brakes and maintainability index；The present invention is provided with a kind of novel relay valve, it is provided that often
With the brake force output of the coupling that realization under braking and two kinds of operating modes of brake hard is adapted under two kinds of operating modes, improve system
Safety Redundancy；The present invention is provided with the backup functionality of urgent electromagnetic valve, when urgent solenoid valve failure, can substitute for urgent electromagnetic valve
Realize emergency function, cannot apply the emergency brake and provide solution due to urgent solenoid valve failure for train in running
Way, increases the Safety Redundancy of system；The invention provides and export one by a series of device in the case of empty spring explosion
The individual empty spring pressure of constant simulation to the signal chamber of empty and load brake regulator realizes the adjustment of urgent pre-governor pressure, adds the safety of system
Property；The present invention is provided with a device forcing remotely to alleviate, and is placed on the pipeline between relay valve and checking cylinder, and car is provided with control
System remotely alleviates the press button of device, can be alleviated remotely alleviating device by switch, improve processing safety and
The maintainability of system；Present invention also offers the pressure interface of a kind of indirect braking, it is simple to hang together or electric pneumatic breaking at train
Backup braking is carried out during fault, i.e. the same with locomotive, alleviation and the braking of train is realized by the increase and decrease pressure of operation train pipe.
Accompanying drawing explanation
By the detailed description non-limiting example made with reference to the following drawings of reading, the further feature of the present invention,
Purpose and advantage will become more apparent upon:
Fig. 1 is the logic schematic diagram of gas circuit of the present invention.
Fig. 2 is the logic schematic diagram of gas circuit of the relay valve of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.Following example will assist in the technology of this area
Personnel are further appreciated by the present invention, but limit the present invention the most in any form.It should be pointed out that, the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement.These broadly fall into the present invention
Protection domain.
Present invention gas used for rail vehicle brak control unit includes:
Multiple pressure measuring tie-ins, are placed on the pipeline of gas circuit base plate, the pressure in detecting corresponding pipeline；
Multiple pressure transducers, are placed on the pipeline of gas circuit base plate, for by the pressure signal conversion in corresponding pipeline
For the signal of telecommunication and export；
Multiple pressure switches, are placed on the pipeline of gas circuit base plate, for the pressure in pipeline being detected, showing,
Report to the police, control output, to guarantee the properly functioning of whole gas brak control unit used for rail vehicle；
Relay valve, is placed on gas circuit base plate, controls aerofluxus or inflation for the change according to pre-governor pressure.
As shown in Figure 1 to Figure 2, present invention gas used for rail vehicle brak control unit also includes pilot solenoid valve 6, air relief valve
7, Pneumatic valve the 8, first double check valve 9, cutout cock 10, equalizing valve 11, relay valve the 15, second double check valve 18, bare weight
Car valve 19, throttle orifice 20, multiple pressure measuring tie-ins are first pressure measuring tie-in the 1, second pressure measuring tie-in the 3, the 3rd pressure measuring tie-ins the 4, the 4th
Pressure measuring tie-in the 5, the 5th pressure measuring tie-in the 12, the 6th pressure measuring tie-in the 14, the 7th pressure measuring tie-in the 17, the 8th pressure measuring tie-in the 22, the 9th is surveyed
Crimp head 24, multiple pressure transducers be first pressure transducer the 2, second pressure transducer 16, the 3rd pressure transducer 21,
Four pressure transducers 23, multiple pressure switches are first pressure switch the 13, second pressure switches 25, the IN mouth of pilot solenoid valve 6
Being connected with the R1 mouth of the second wind regime, the OUT port of pilot solenoid valve 6 is connected with the R2 mouth of relay valve 15, and the first pressure switch 13 is also
Be connected on the pipeline between pilot solenoid valve 6 and relay valve 15, three total wind pressure connector R3 mouths of relay valve 15, R4 mouth,
R5 mouth all pass through inside pipeline and the first wind regime R mouth be connected, the C mouth of relay valve 15 is connected with the C1 mouth of checking cylinder, in
Continue on the pipeline between C mouth and the C1 mouth of checking cylinder of valve 15 and be connected to the 4th pressure transducer 23, the 9th pressure measuring tie-in 24,
Two pressure switches 25, the first pressure measuring tie-in 1 and the first pressure transducer 2 are all connected to the R of the first wind regime by internal pipeline
On mouth, the IN mouth of air relief valve 7 and the R mouth of the first wind regime are connected, and the OUT port of air relief valve 7 is connected with the IN mouth of Pneumatic valve 8, and second
Pressure measuring tie-in 3 is connected between the pipeline of air relief valve 7 and Pneumatic valve 8, the OUT port of Pneumatic valve 8 and the first double check valve 9
IN1 mouth is connected, and the 3rd pressure measuring tie-in 4 is connected to the pipeline between the OUT port of Pneumatic valve 8 and the IN1 mouth of the first double check valve 9
On, the IN2 mouth of the first double check valve 9 is connected with the OUT port of equalizing valve 11 and the IN2 mouth of the first double check valve 9 and all pressing
On pipeline between the OUT port of valve 11 and connect a pipeline being connected with the T mouth of Pneumatic valve 8, the IN3 mouth of equalizing valve 11 and first
The R mouth of wind regime is connected, the IN1 mouth of equalizing valve 11, equalizing valve 11 IN2 mouth respectively with the T1 mouth of empty spring pressure, empty spring pressure
T2 mouth is connected, and the 4th pressure measuring tie-in 5 is connected on the pipeline between the IN1 mouth of equalizing valve 11 and the T1 mouth of empty spring pressure, and the 5th
Pressure measuring tie-in 12 is connected on the pipeline between the IN2 mouth of equalizing valve 11 and the T2 mouth of empty spring pressure, the first double check valve 9
OUT port is connected with the IN mouth of cutout cock 10, and the OUT port of cutout cock 10 is connected with the T mouth of empty and load brake regulator 19, cutout cock 10
OUT port and the T mouth of empty and load brake regulator 19 between and be connected to the 3rd pressure transducer the 21, the 8th pressure measuring tie-in 22, throttle orifice 20, empty
The OUT port of loaded vehicle valve 19 is connected with the T mouth of relay valve 15, the 6th pressure measuring tie-in 14 be connected to empty and load brake regulator 19 OUT port and in
Continuing between the T mouth of valve 15, the IN1 mouth of empty and load brake regulator 19 and the OUT port of the second double check valve 18 are connected, the second double check valve
The IN2 mouth of 18 is connected with the EPout mouth of relay valve 15, the IN1 mouth of the second double check valve 18 and the DV mouth of indirect brake interface
Be connected, between the IN1 mouth of the second double check valve 18 and the DV mouth of indirect brake interface and be connected to the second pressure transducer 16,
7th pressure measuring tie-in 17.
Described empty and load brake regulator still has brake riggings to control pressure output in the case of empty spring pressure is zero.Described air relief valve
Use the mounting means of plate connecting type, can be by the wind regime pressure of import to required stable pressure.Described first pair
It is respectively adopted the form of shuttle valve to check-valves and described second double check valve, has two pressure introduction port and a pressure respectively
Delivery outlet, exports according to the size of input pressure, and the input pressure that selection pressure is big is output pressure, cuts simultaneously
The input that only pressure is little.Described equalizing valve has three pressure introduction port and a pressure output, can be by the pressure of two inputs
Power is kept forging ahead and is exported after meansigma methods.Described first pressure switch and described second pressure switch are all the mounting means of plate connecting type, pressure
Difference is non-adjustable, and contact form is all single-pole double throw.Described cutout cock is the mounting means of plate connecting type, two-bit triplet, and band side is arranged
Form, exhaust source is downstream pressure.Described pilot solenoid valve is defeated to control relay valve in order to the control relay valve first auxiliary air valve
Go out the brake-cylinder pressure of different series, meet the demand of train difference operating mode, the normal dead electricity of described electromagnetic valve, the work of described electromagnetic valve
It is DC110V as voltage.
Described relay valve 15 include adjusting air valve 151, relaying air valve 152, emergency backup valve 153, urgent electromagnetic valve 154,
Braking electromagnetic valve 155, release electromagnetic valve 156, relay valve pressure transducer 157, long-range release electromagnetic valve 158, remotely alleviate gas
Valve 159, adjusting air valve 151 is connected with the R2 mouth of relay valve 15, the two ends of relaying air valve 152 respectively with the R3 mouth of relay valve 15 and
The T mouth of relay valve 15 is connected, and the IN1 mouth of emergency backup valve 153 is connected with the R4 mouth of relay valve 15, the OUT of emergency backup valve 153
Mouth is connected with the EPout mouth of relay valve 15, and the IN1 mouth of urgent electromagnetic valve 154 is connected, promptly with the IN1 mouth of emergency backup valve 153
The OUT port of electromagnetic valve 154 is connected with the OUT port of emergency backup valve 153, the IN2 mouth of urgent electromagnetic valve 154 and braking electromagnetic valve
The OUT port of 155, the IN mouth of release electromagnetic valve 156 are connected, and relay valve pressure transducer 157 is connected to urgent electromagnetic valve 154
IN2 mouth, the OUT port of braking electromagnetic valve 155, release electromagnetic valve 156 IN mouth between pipeline on, long-range release electromagnetic valve 158
It is connected with the R2 mouth of relay valve 15, remotely alleviation air valve 159, remotely alleviates air valve 159 and relaying air valve 152, the C of relay valve 15
Mouth is connected.
Described relay valve is by adjusting air valve, relaying air valve, emergency backup valve, urgent electromagnetic valve, braking electromagnetic valve, alleviation electricity
Magnet valve, long-range release electromagnetic valve, remotely alleviation air valve are integrated on valve, it is provided that Safety Redundancy function, can export different series
Brake-cylinder pressure, also provide for a kind of pop valve backup functionality, when pop valve fault, pop valve can be substituted and promptly press
Power exports, and also provides the function of remotely alleviation simultaneously.
Described gas brak control unit used for rail vehicle is positioned on gas circuit base plate, and the inside of described gas circuit base plate is drilled with gas circuit
Hole, each valve is all attached by the gas circuit hole of the inside of described gas circuit base plate, and described gas circuit base plate also includes keyset, described
It also is provided with gas circuit hole inside keyset, is externally screwed hole, in order to connect outside gas circuit and output pressure to external system, described
Keyset is positioned at the back side of the valve installed surface of described gas circuit base plate.
The back side of described gas circuit base plate is additionally provided with electric connector, the valve of front band live wire, pressure transducer, pressure
Switch isoelectric line is linked on the public pin of electric connector, and described gas brak control unit is by this electric connector and electronics system
Dynamic control unit connects.
Described gas circuit base plate is provided with installation screwed hole and the installation screwed hole of pressure measuring tie-in, the described gas of pressure transducer
The peripheral side of road base plate be provided with install screw plug screwed hole, described keyset be provided with six to external screw joint, point
It not the first wind regime interface, the second wind regime interface, the TI mouth interface of empty spring pressure, empty the T2 mouth interface of spring pressure, checking cylinder
C1 mouth interface, the DV mouth interface of indirect brake pressure port.
Described first pressure transducer, described second pressure transducer, described 3rd pressure transducer, described 4th pressure
The interface of sensor is all external thread form, and working pressure range is all 0-10bar, for measuring the pressure of checking cylinder, load-carrying
Pressure, total wind pressure and the pressure of indirect brake interface, so measure accurately and be easy to fix.
Described first pressure measuring tie-in, described second pressure measuring tie-in, described 3rd pressure measuring tie-in, described 4th pressure measuring tie-in,
Described 5th pressure measuring tie-in, described 6th pressure measuring tie-in, described 7th pressure measuring tie-in, described 8th pressure measuring tie-in, the described 9th
Pressure measuring tie-in is all externally threaded connected mode, is designed with dust cap, and side is designed with dust cap ejector button, is all the most single
To valve arrangement, after corresponding plug presses down, internal pressure can be derived, for total wind pressure, relay valve pre-control
Pressure, indirect brake interface pressure, empty spring pressure, brake-cylinder pressure and load-carrying pressure carry out pressure measurement, such good dustproof effect.
The operation principle of present invention gas used for rail vehicle brak control unit is as follows:
Before elaborating the operation principle of this gas brak control unit used for rail vehicle, the most each first gas channels
Connecting source and target source, the second wind regime outside the connection of R1 mouth, the first wind regime outside the connection of R mouth, T1 mouth connects empty spring pressure
One end, T2 mouth connects the other end of empty spring pressure, and C1 mouth connects checking cylinder, and DV mouth connects indirect brake interface.
Especially it is emphasised that: relay valve is integrated with adjusting air valve, relaying air valve, emergency backup valve, urgent electromagnetic valve, braking
Electromagnetic valve, release electromagnetic valve, long-range release electromagnetic valve, remotely alleviate air valve, there are numerous important functions such as Safety Redundancy, tightly
Urgent telegram magnet valve is the most charged, and emergency backup valve is normal dead electricity.
Especially it is emphasised that: under normal circumstances, the pressure treatment mode of the T mouth of empty and load brake regulator 19 is the T1 mouth of sky spring pressure
It is separately input into the IN1 mouth of equalizing valve 11 and the IN2 mouth of equalizing valve 11 with the T2 mouth of empty spring pressure, all presses through equalizing valve 11
After, respectively the meansigma methods of two ends sky spring pressure is exported the IN2 mouth to the first double check valve 9 and the T mouth of Pneumatic valve 8, decompression
The IN mouth of valve 7 connects the first wind regime, exports the IN mouth to Pneumatic valve 8 after decompression, and the pressure of the T mouth of Pneumatic valve 8 is more than gas control
The setting high point switching value of valve 8, the OUT port output of Pneumatic valve 8 and the pressure of the equal size of T mouth pressure of Pneumatic valve 8 are to first
The IN1 mouth of double check valve 9, through cutout cock 10 and export the T mouth to empty and load brake regulator 19.
When any one end explosion of empty spring pressure, empty spring pressure drastically reduces, the pressure after equalizing valve 11 is all pressed
Also drastically reducing, the pressure of the T mouth arriving Pneumatic valve 8 is less than the setting low spot switching value of Pneumatic valve 8, and the OUT port of Pneumatic valve 8 is defeated
The pressure that the pressure gone out exports with air relief valve 7 is consistent, and for constant pressure, this pressure is through the first double check valve 9 and blocks plug
Door 10 exports the T mouth to empty and load brake regulator 19, it is achieved the output of the pre-governor pressure of brake hard.
The operation principle of described gas brak control unit is illustrated below from Four processes:
One, service braking, under service braking operating mode, gas brak control unit used for rail vehicle response deceleration of electrons controls
The braking signal of telecommunication of unit, according to the load-carrying pressure of the Current vehicle of empty and load brake regulator output, controls the regulation of the inside of relay valve
Wind regime pressure is adjusted to the pre-governor pressure of satisfactory relay valve by air valve, makes relay valve export satisfactory big flow
Brake-cylinder pressure, under service braking operating mode, pilot solenoid valve energized action, wind regime pressure by the R1 mouth of the first wind regime to guide
The IN mouth of electromagnetic valve, then the OUT port to pilot solenoid valve, then the R2 mouth to relay valve, the more pre-governor pressure to modulating gas valve valve
Chamber, modulating gas valve valve events, relaying air valve is switched to low-pressure output mode, and main process of gas path is: electronic brake control unit
Send the signal of telecommunication and control braking electromagnetic valve and release electromagnetic valve, wind regime by the IN mouth of the R5 mouth of relay valve to braking electromagnetic valve, then
To the IN2 mouth of urgent electromagnetic valve, then the OUT port to urgent electromagnetic valve, then the EPout mouth to relay valve, then to second two-way only
Return the IN2 mouth of valve, then the OUT port to the second double check valve, then the IN1 mouth to empty and load brake regulator, then the OUT to empty and load brake regulator 19
Mouthful, then the T mouth to relay valve, then to relaying the pre-control pressure chamber of air valve, meanwhile, electronic brake control unit can gather the 4th pressure
The force value of force transducer also compares with target pressure value, and in real time, stable, quickly adjust the pre-governor pressure of relay valve,
Realize the applying of service braking.
Two, brake hard, under brake hard operating mode, pilot solenoid valve dead electricity, relaying air valve is switched to high pressure output
Pattern, meanwhile, urgent electromagnetic valve dead electricity, wind regime pressure is exported empty and load brake regulator through urgent electromagnetic valve and is adjusted by empty and load brake regulator
Whole exporting to relaying air valve for urgent pre-governor pressure, it is achieved the quick output of emergency brake pressure, main process of gas path is: wind regime by
The R4 mouth of relay valve is to the IN1 mouth of urgent electromagnetic valve, then the OUT port to urgent electromagnetic valve, then the EPout mouth to relay valve, then
To the IN2 mouth of the second double check valve, then the OUT port to the second double check valve, then the IN1 mouth to empty and load brake regulator, then to empty
The OUT port of loaded vehicle valve, then the T mouth to relay valve, then to relaying the pre-control pressure chamber of air valve, relaying air valve output big-flow high-pressure
The emergency brake pressure of power is to checking cylinder, it is achieved the applying of brake hard.
In train travelling process, owing to certain situation causes urgent solenoid valve failure, urgent electromagnetic valve cannot be the most defeated
In the case of going out pressure, emergency backup pattern can be started, emergency backup valve complete the work of urgent electromagnetic valve, the most standby
Part valve is dead electricity under normal circumstances, can become to obtain electricity condition so being once activated, and concrete process of gas path is: wind regime by
The continue R4 mouth of valve is to the IN1 mouth of emergency backup valve, then the OUT port to emergency backup valve, then the EPout mouth to relay valve, more extremely
The IN2 mouth of the second double check valve, then the OUT port to the second double check valve, then the IN1 mouth to empty and load brake regulator, then to bare weight
The OUT port of car valve, then the T mouth to relay valve, then to relaying the pre-control pressure chamber of air valve, relaying air valve output big-flow high-pressure power
Emergency brake pressure to checking cylinder.
Three, service braking is alleviated, the alleviation electricity of gas brak control unit used for rail vehicle response electronic brake control unit
Signal, control relay valve internal relaying air valve by the emptying of pre-governor pressure, owing to relay valve backs up with relay valve failure safe
Function, produces again a fixing pressure output, so collecting at electronic brake control unit in the short time after i.e. alleviating
When the pressure of the 4th pressure transducer is zero, control long-range release electromagnetic valve energized action simultaneously, by relay valve and checking cylinder it
Between pressure channel cut off, checking cylinder complete incidence graph, concrete process of gas path is: relaying air valve pre-governor pressure to empty and load brake regulator
OUT port, then the IN1 mouth to empty and load brake regulator, then the OUT port to the second double check valve, then the IN2 to the second double check valve
Mouthful, then the EPout mouth to relay valve, then the OUT port to urgent electromagnetic valve, then the IN2 mouth to urgent electromagnetic valve, then to alleviating electricity
The IN mouth of magnet valve, then the EXO mouth to release electromagnetic valve, then drain into air, it is achieved alleviate.
Four, brake hard is alleviated, and gas brak control unit used for rail vehicle is alleviated after applying the emergency brake, promptly electricity
Magnet valve obtains electric, and the IN1 mouth of urgent electromagnetic valve and the OUT port of urgent electromagnetic valve disconnect, the IN2 mouth of urgent electromagnetic valve and urgent electromagnetism
The OUT port conducting of valve, release electromagnetic valve obtains electric, the OUT port of the urgent pre-governor pressure of relaying air valve to empty and load brake regulator, then to bare weight
The IN1 mouth of car valve, then the OUT port to the second double check valve, then the IN2 mouth to the second double check valve, then to relay valve
EPout mouth, then the OUT port to urgent electromagnetic valve, then the IN2 mouth to urgent electromagnetic valve, then the IN mouth to release electromagnetic valve, more extremely
The EXO mouth of release electromagnetic valve, then drain into air, it is achieved brake hard is alleviated.
Five, force remotely to alleviate, when needs carry out forcing remotely to alleviate, press the press button forcing remotely to alleviate
After, long-range release electromagnetic valve obtains electric, and the pre-governor pressure remotely alleviating air valve is drained into air by long-range release electromagnetic valve, remotely alleviates
Air valve action, cuts off the pressure channel between relaying air valve and checking cylinder, and the pressure of braking cylinder end is drained into air, it is achieved be remote
Journey mitigation capability.
Six, empty spring burst conditions, when any one end explosion of empty spring pressure, empty spring pressure drastically reduces, through all pressing
Pressure after valve is all pressed also drastically reduces, and the pressure of the T mouth arriving Pneumatic valve is less than the setting low spot switching value of Pneumatic valve, gas control
The pressure of the OUT port output of valve is consistent with the pressure that air relief valve exports, and for constant pressure, this pressure is through the first double check valve
T mouth with cutout cock output to empty and load brake regulator, it is achieved the output of the pre-governor pressure of brake hard, and then realize brake hard, main
Process of gas path is: wind regime is by the IN mouth of the R mouth of the first wind regime to air relief valve, then the OUT port to air relief valve 7, then to Pneumatic valve
IN mouth, then the OUT port to Pneumatic valve, then the IN1 mouth to the first double check valve, then the OUT port to the first double check valve, then
To the IN mouth of cutout cock, then the OUT port to cutout cock, then the T mouth to empty and load brake regulator, when the 3rd pressure transducer detects
After constant pressure, control urgent electromagnetic valve dead electricity, it is achieved brake hard.
Described gas brak control unit be provided with relay valve fail safe redundant function, pop valve fail safe redundant function,
Remotely mitigation capability, output different series brake-cylinder pressure function and air spring damage or in the case of explosion required for adopt
The emergency safety measure taken.Described novel relay valve, described empty and load brake regulator, described double check valve, described air relief valve, described gas
Control valve, described equalizing valve, described pilot solenoid valve, described pressure transducer, described pressure switch, described cutout cock, described
Pressure measuring tie-in is installed concentratedly on described gas circuit base plate, and described gas circuit base plate interior is drilled with gas circuit hole, and each valve passes through described gas
The gas circuit hole of road base plate interior is attached, and also has gas circuit hole, be externally screwed hole, in order to connect outside inside described keyset
Gas circuit and output pressure are to external system, and described keyset is arranged on the back side of the valve installed surface of described gas circuit base plate.Described
Being additionally provided with the installation screwed hole of pressure transducer and pressure measuring tie-in on gas circuit base plate, gas circuit base plate peripheral side is provided with installation
The screwed hole of screw plug.Be provided with on described keyset five to external screw joint, be the first wind regime interface, the second wind respectively
Source interface, the first empty spring compression fittings, the second empty spring pressure interface, brake-cylinder pressure interface and indirect brake pressure port.Institute
State novel relay valve EP valve module, pop valve and emergency backup valve to be integrated on valve, it is provided that Safety Redundancy function, can export
The brake-cylinder pressure of different series, also provides for a kind of pop valve backup functionality, when pop valve fault, can substitute pop valve and enter
Row emergency pressure exports, and also provides the function of remotely alleviation simultaneously.Described control car valve can be according to vehicle load pressure
Change the pre-governor pressure to novel relay valve to be adjusted, and then revise the output of vehicle braking control pressure, described empty and load
Valve still has brake riggings to control pressure output in the case of empty spring pressure is zero.Described double check valve uses the shape of shuttle valve
Formula, has two pressure introduction port and a pressure output, and it exports according to the size of input pressure, selection pressure
Big input pressure is output pressure, the input that cutoff pressure is little simultaneously.Described air relief valve can be by import wind regime pressure
Being decompressed to required stable pressure, air relief valve uses plate connecting type mounting means.Described Pneumatic valve is internal pilot formula shuttle valve
Structure, can carry out the opening and closing of valve according to the pressure reduction of two inputs.It has two pressure introduction port and a pressure defeated
Outlet.The pressure of two inputs can be kept forging ahead and be exported after meansigma methods by described equalizing valve, and described equalizing valve has three pressure introduction port
With a pressure output.Described pilot solenoid valve exports to control relay valve in order to the control novel relay valve first auxiliary air valve
The brake-cylinder pressure of different series, meets the demand of train difference operating mode, the normal dead electricity of described electromagnetic valve, described electromagnetic valve work electricity
Pressure is DC110V.Described pressure transducer is current mode pressure transducer, and interface is external thread form, and working pressure range is 0-
10bar, can measure brake-cylinder pressure, load-carrying pressure, total wind pressure and indirect brake interface pressure.Described pressure switch is plate
Connecing formula mounting means, pressure reduction is non-adjustable, and contact form is single-pole double throw.Described cutout cock is plate connecting type mounting means, two
Threeway, band side row's form, exhaust source is downstream pressure.Described pressure measuring tie-in is external screw thread connected mode, described pressure measuring tie-in band
Having dust cap, side to have button, can eject dust cap after pressing down, pressure measuring tie-in is Manual one-way valve structure, by correspondence
Plug press down after, internal pressure can be derived, can be to total wind pressure, the pre-governor pressure of relay valve, indirect brake interface
Pressure, empty spring pressure, brake-cylinder pressure and load-carrying pressure carry out pressure measurement.It is also equipped with electrically connecing at the back side of described gas circuit base plate
Plug-in unit, the valve of front band live wire, pressure transducer, pressure switch isoelectric line be linked on the public pin of electric connector, institute
State gas brak control unit to be connected with EBCU electronic brake control unit by this electric connector.
In sum, each duty valve block of the present invention is installed concentratedly on one piece of gas path plate, is entered by inner air path passage
Row logical groups, integration degree is high, control accuracy is high, stability good, improves safe performance indexes and the Ke Wei of brakes
Repairing property index；The present invention is provided with novel relay valve, it is provided that realize being adapted under service braking and two kinds of operating modes of brake hard
The brake force output of the coupling under two kinds of operating modes, improves the Safety Redundancy of system；The present invention is provided with the backup of urgent electromagnetic valve
Function, when urgent solenoid valve failure, can substitute for urgent electromagnetic valve and realizes function, for train in running due to promptly
Solenoid valve failure and cannot apply the emergency brake and provide solution, increase system Safety Redundancy；The invention provides
The empty spring pressure of constant simulation is exported to the signal chamber of empty and load brake regulator by a series of device in the case of empty spring explosion
Realize the adjustment of urgent pre-governor pressure, add the safety of system；The present invention is provided with a device forcing remotely to alleviate, and puts
On pipeline between relay valve and checking cylinder, car is provided with the press button controlling remotely to alleviate device, can be right by switch
Remotely alleviate device to alleviate, improve the maintainability of processing safety and system；Present invention also offers a kind of indirect
The pressure interface of braking, it is simple to hang together or carry out during electric pneumatic breaking fault backup braking at train is i.e. the same with locomotive, by behaviour
The increase and decrease pressure making train pipe realizes alleviation and the braking of train.
Above the specific embodiment of the present invention is described.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformation or amendment within the scope of the claims, this not shadow
Ring the flesh and blood of the present invention.
Claims (8)
1. a gas brak control unit used for rail vehicle, it is characterised in that described gas brak control unit bag used for rail vehicle
Include:
Multiple pressure measuring tie-ins, are placed on the pipeline of gas circuit base plate, the pressure in detecting corresponding pipeline；
Multiple pressure transducers, are placed on the pipeline of gas circuit base plate, for the pressure signal in corresponding pipeline is converted to electricity
Signal also exports；
Multiple pressure switches, are placed on the pipeline of gas circuit base plate, for the pressure in pipeline being detected, shows, reporting to the police,
Control output, to guarantee the properly functioning of whole gas brak control unit used for rail vehicle；
Relay valve, is placed on gas circuit base plate, controls aerofluxus or inflation for the change according to pre-governor pressure.
Gas brak control unit used for rail vehicle the most according to claim 1, it is characterised in that described gas used for rail vehicle
Brak control unit also include pilot solenoid valve, air relief valve, Pneumatic valve, the first double check valve, cutout cock, equalizing valve, in
Continue valve, the second double check valve, empty and load brake regulator, throttle orifice, multiple pressure measuring tie-ins be the first pressure measuring tie-in, the second pressure measuring tie-in,
3rd pressure measuring tie-in, the 4th pressure measuring tie-in, the 5th pressure measuring tie-in, the 6th pressure measuring tie-in, the 7th pressure measuring tie-in, the 8th pressure measurement connect
Head, the 9th pressure measuring tie-in, multiple pressure transducers be the first pressure transducer, the second pressure transducer, the 3rd pressure transducer,
4th pressure transducer, multiple pressure switches are the first pressure switch, the second pressure switch, the IN mouth of pilot solenoid valve and second
The R1 mouth of wind regime is connected, and the OUT port of pilot solenoid valve is connected with the R2 mouth of relay valve, and the first pressure switch is connected to first conductive magnetism
On pipeline between valve and relay valve, three total wind pressure connector R3 mouths of relay valve, R4 mouth, R5 mouth all pass through the pipe of inside
Road is connected with the R mouth of the first wind regime, and the C mouth of relay valve is connected with the C1 mouth of checking cylinder, at C mouth and the C1 of checking cylinder of relay valve
On pipeline between Kou and be connected to the 4th pressure transducer, the 9th pressure measuring tie-in, the second pressure switch, the first pressure measuring tie-in and
One pressure transducer is all connected on the R mouth of the first wind regime by internal pipeline, the IN mouth of air relief valve and the R mouth of the first wind regime
Be connected, the OUT port of air relief valve is connected with the IN mouth of Pneumatic valve, the second pressure measuring tie-in be connected to air relief valve and Pneumatic valve pipeline it
Between, the OUT port of Pneumatic valve and the IN1 mouth of the first double check valve are connected, the 3rd pressure measuring tie-in be connected to Pneumatic valve OUT port and
On pipeline between the IN1 mouth of the first double check valve, the IN2 mouth of the first double check valve be connected with the OUT port of equalizing valve and
On pipeline between IN2 mouth and the OUT port of equalizing valve of the first double check valve and connect a pipe being connected with the T mouth of Pneumatic valve
Road, the IN3 mouth of equalizing valve and the R mouth of the first wind regime are connected, the IN1 mouth of equalizing valve, equalizing valve IN2 mouth respectively with empty spring pressure
T1 mouth, the T2 mouth of empty spring pressure be connected, the 4th pressure measuring tie-in is connected between the IN1 mouth of equalizing valve and the T1 mouth of empty spring pressure
Pipeline on, the 5th pressure measuring tie-in is connected on the pipeline between the IN2 mouth of equalizing valve and the T2 mouth of empty spring pressure, and first is two-way
The OUT port of check-valves is connected with the IN mouth of cutout cock, and the OUT port of cutout cock is connected with the T mouth of empty and load brake regulator, cutout cock
OUT port and the T mouth of empty and load brake regulator between and be connected to the 3rd pressure transducer, the 8th pressure measuring tie-in, throttle orifice, empty and load brake regulator
OUT port is connected with the T mouth of relay valve, and the 6th pressure measuring tie-in is connected between the OUT port of empty and load brake regulator and the T mouth of relay valve, empty
The IN1 mouth of loaded vehicle valve and the OUT port of the second double check valve are connected, the IN2 mouth of the second double check valve and the EPout of relay valve
Mouth is connected, and the IN1 mouth of the second double check valve is connected with the DV mouth of indirect brake interface, at the IN1 mouth of the second double check valve
And between the DV mouth of indirect brake interface and be connected to the second pressure transducer, the 7th pressure measuring tie-in.
Gas brak control unit used for rail vehicle the most according to claim 1, it is characterised in that described relay valve includes adjusting
Air throttle, relaying air valve, emergency backup valve, urgent electromagnetic valve, braking electromagnetic valve, release electromagnetic valve, relay valve pressure transducer,
Remotely release electromagnetic valve, remotely alleviate air valve, adjusting air valve is connected with the R2 mouth of relay valve, relay the two ends of air valve respectively with in
The R3 mouth of valve that continues is connected with the T mouth of relay valve, and the IN1 mouth of emergency backup valve is connected with the R4 mouth of relay valve, emergency backup valve
OUT port is connected with the EPout mouth of relay valve, and the IN1 mouth of urgent electromagnetic valve is connected with the IN1 mouth of emergency backup valve, urgent electromagnetism
The OUT port of valve is connected with the OUT port of emergency backup valve, the IN2 mouth of urgent electromagnetic valve and the OUT port of braking electromagnetic valve, alleviation electricity
The IN mouth of magnet valve is connected, and relay valve pressure transducer is connected to the IN2 mouth of urgent electromagnetic valve, the OUT port of braking electromagnetic valve, alleviation
On pipeline between the IN mouth of electromagnetic valve, long-range release electromagnetic valve is connected with the R2 mouth of relay valve, remotely alleviation air valve, remotely delays
Solve air valve to be connected with relaying air valve, the C mouth of relay valve.
Gas brak control unit used for rail vehicle the most according to claim 1, it is characterised in that described gas used for rail vehicle
Brak control unit is positioned on gas circuit base plate, and the inside of described gas circuit base plate is drilled with gas circuit hole, and described gas circuit base plate also includes turning
Fishplate bar, also is provided with gas circuit hole inside described keyset, be externally screwed hole, in order to connect outside gas circuit and output pressure to outside
System, described keyset is positioned at the back side of the valve installed surface of described gas circuit base plate.
Gas brak control unit used for rail vehicle the most according to claim 1, it is characterised in that the back of the body of described gas circuit base plate
Face is additionally provided with electric connector.
Gas brak control unit used for rail vehicle the most according to claim 1, it is characterised in that set on described gas circuit base plate
Have pressure transducer installs screwed hole and the installation screwed hole of pressure measuring tie-in, and the peripheral side of described gas circuit base plate is provided with installation
The screwed hole of screw plug, described keyset be provided with six to external screw joint, be the first wind regime interface, the second wind regime respectively
Interface, the TI mouth interface of empty spring pressure, empty the T2 mouth interface of spring pressure, the C1 mouth interface of checking cylinder, indirect brake pressure DV mouth
Interface.
Gas brak control unit used for rail vehicle the most according to claim 1, it is characterised in that described first pressure sensing
Device, described second pressure transducer, described 3rd pressure transducer, the interface of described 4th pressure transducer are all external screw thread shape
Formula, working pressure range is all 0-10bar.
Gas brak control unit used for rail vehicle the most according to claim 1, it is characterised in that described first pressure measurement connects
Head, described second pressure measuring tie-in, described 3rd pressure measuring tie-in, described 4th pressure measuring tie-in, described 5th pressure measuring tie-in, described
Six pressure measuring tie-ins, described 7th pressure measuring tie-in, described 8th pressure measuring tie-in, described 9th pressure measuring tie-in are all externally threaded connection
Mode, is designed with dust cap, and side is designed with dust cap ejector button, is all Manual one-way valve structure, presses at corresponding plug
After going down, internal pressure can be derived.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610705109.4A CN106080650B (en) | 2016-08-23 | 2016-08-23 | A kind of gas brak control unit used for rail vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610705109.4A CN106080650B (en) | 2016-08-23 | 2016-08-23 | A kind of gas brak control unit used for rail vehicle |
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| CN106080650A true CN106080650A (en) | 2016-11-09 |
| CN106080650B CN106080650B (en) | 2018-01-30 |
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| CN201610705109.4A Expired - Fee Related CN106080650B (en) | 2016-08-23 | 2016-08-23 | A kind of gas brak control unit used for rail vehicle |
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| CN106740806A (en) * | 2017-01-20 | 2017-05-31 | 深圳市远望谷信息技术股份有限公司 | A kind of air damping machine detecting device for rolling stock |
| CN107933603A (en) * | 2017-11-14 | 2018-04-20 | 中车长春轨道客车股份有限公司 | City railway train transportation resources |
| CN110065487A (en) * | 2019-04-30 | 2019-07-30 | 南京中车浦镇海泰制动设备有限公司 | A kind of rail traffic use for brake system pressure monitoring device |
| CN111016954A (en) * | 2019-12-26 | 2020-04-17 | 中车株洲电力机车有限公司 | Remote release control device for brake cylinder of railway vehicle |
| CN112193229A (en) * | 2020-10-19 | 2021-01-08 | 中车株洲电力机车有限公司 | Rail transit vehicle braking system and braking control method |
| CN113212405A (en) * | 2021-06-01 | 2021-08-06 | 中车青岛四方车辆研究所有限公司 | Locomotive backup brake device, control method thereof and locomotive |
| CN113859203A (en) * | 2021-10-22 | 2021-12-31 | 浙江瑞立空压装备有限公司 | Brake pressure control device and method |
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| CN112193229A (en) * | 2020-10-19 | 2021-01-08 | 中车株洲电力机车有限公司 | Rail transit vehicle braking system and braking control method |
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| CN106080650B (en) | 2018-01-30 |
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