CN-122009118-A - Derailment braking system for railway freight car

CN122009118ACN 122009118 ACN122009118 ACN 122009118ACN-122009118-A

Abstract

The invention discloses a railway wagon derailment braking system which comprises a measurement and control unit, a battery unit and an execution unit, wherein the units are detachably connected through cables with quick connectors, the measurement and control unit is arranged right above 2 and 3 wheels of a railway wagon, the battery unit is arranged close to the measurement and control unit and is used for providing continuous power supply for the system, and the execution unit is connected in series between a telecentric dust collector and a braking valve. The invention abandons the traditional mechanical axle-locking structure, greatly reduces the disassembly and assembly workload and the damage risk of parts during the overhaul of the vehicle, improves the maintenance convenience by the modularized layout and quick-insertion connection design, enhances the adaptability of the system to the severe running working conditions of the railway freight car by the material technology of high-protection-level encapsulation and extreme environment resistance, reduces the cost of frequently replacing consumable materials by matching with a low-power-consumption hardware design and a long-service-life power supply unit, and optimizes the practicability and reliability of the derailment brake of the railway freight car from the aspects of structural design and basic performance.

Inventors

REN WANXING
FANG ZHIJIAN
YI LIDONG
YI XINBING
LI YANGYANG
WAN FENG

Assignees

株洲科盟车辆配件有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260304

Claims (10)

1. The derailment braking system of the railway wagon is characterized by comprising a measurement and control unit, a battery unit and an execution unit, wherein the units are detachably connected through a cable with a quick connector; The measurement and control unit is arranged above the wheel alignment of the railway wagon 2 and 3 wheel sets of the railway wagon and is connected with a mounting seat bolt fixed on a middle beam at the bottom of the wagon body, and is used for detecting the displacement of the wheel sets relative to the wagon body and outputting a braking control instruction; The battery unit is arranged close to the measurement and control unit and provides continuous power supply for the system; The execution unit is connected in series between the telecentric dust collector and the brake valve, and receives the instruction of the measurement and control unit to realize the exhaust of the train pipe.
2. The derailment brake system of railway freight car according to claim 1, wherein each system is provided with 2 sets of measurement and control units, each system of 2 sets of battery units is provided with 4 sets of measurement and control units, 4 sets of battery units and 1 set of execution unit, and the measurement and control units are fixed with the mounting seat through 4M 10 bolts.
3. The derailment braking system of a railway wagon according to claim 1, wherein the measurement and control unit is based on an electromagnetic induction ranging principle to realize non-contact displacement detection, the measurement and control unit is disc-shaped in appearance, a cable socket, a status indicator lamp and a function button are arranged on the side face of the measurement and control unit, an ultra-low power consumption system-level chip is integrated inside the measurement and control unit, and the chip integrates sensing, calculating, storing and communication functions and has an intelligent power management function of dormancy when a vehicle is stationary and waking up when the vehicle moves.
4. The derailment brake system of railway freight car according to claim 1, wherein the displacement acquisition frequency of the measurement and control unit is 1Hz, the displacement acquisition frequency is 10Hz, the acquisition resolution reaches 0.01mm, and the continuous detection precision is stabilized at + -1 mm after the software filtering treatment.
5. The derailment brake system of railway wagon according to claim 1, wherein the battery unit is a disposable lithium-ion battery Li-SOCl 2 , and comprises an electric core, a protection circuit and a plastic shell, and is packaged by adopting an integral glue filling process.
6. The derailment brake system of railway wagon according to claim 1, wherein the executing unit comprises a ball valve motor and a ball valve, the ball valve adopts a stainless steel ball core cutting-off plug door structure special for railway wagon, and the ball valve motor has the functions of manual reset and electric reset.
7. The derailment braking system of the railway wagon according to claim 1, wherein the glue filling process of the measurement and control unit and the battery unit adopts high-low temperature resistant epoxy pouring sealant, has no gap inside, has the anti-corrosion, dustproof and waterproof invasion capabilities, and can bear extreme mechanical vibration impact of the bogie of the wagon.
8. The derailment braking system of a railway wagon according to claim 1, wherein the measurement and control unit is further integrated with a triaxial acceleration sensor, an inclination angle sensor and a speed acquisition module, and the derailment state is accurately judged by adopting a multi-parameter dynamic fusion algorithm, and the method comprises the following specific steps of: S1, synchronously collecting displacement variation of wheel set relative to vehicle body Lateral acceleration of vehicle body Vertical acceleration Inclination angle of wheel set Vehicle running speed The acquisition frequencies are 1Hz and 10Hz, so that the data time sequence consistency is ensured; s2, preprocessing the collected original data through a moving average filtering algorithm, wherein a filtering formula is as follows: Wherein, the In order to filter the data, Is continuous Raw data of the sampling points; S3, according to the running speed of the vehicle Working condition segmentation is carried out, and weight coefficients of all parameters are dynamically adjusted; s4, performing time sequence consistency check on the filtered data, and judging the parameter change trend through a sliding time window; and S5, calculating derailment risk coefficients and early warning coefficients based on the dynamic weight and the checked data, and realizing hierarchical response.
9. The derailment brake system of railway freight car according to claim 8, wherein the condition segmentation and dynamic weight adjustment in step S3 satisfy: When (when) When the speed is less than or equal to 60km/h, the initial value of the weight coefficient is 、、、 ; When 60km/h < When the speed is less than or equal to 100km/h, the initial value of the weight coefficient is 、、、 ; When (when) When the speed is 100km/h, the initial value of the weight coefficient is 、、、 ; Wherein the method comprises the steps of Respectively represent the displacement variation of the wheel pair relative to the vehicle body Weight coefficient of (2) and vehicle transverse acceleration Weight coefficient, vertical acceleration of (2) Weight coefficient of (2), wheel set inclination angle Weight coefficient of (2); The dynamic weight correction formula is: Wherein, the To be corrected after The weight of the individual parameter(s), As an initial weight to be used, =0.3 Is the sensitivity coefficient, For the current parameter to be a filtered value, For a parameter average value of approximately 30s, Is a parameter threshold; derailment risk coefficient And early warning coefficient The calculation formula is as follows: Wherein, the 、、、、、、、 ; Wherein, the For the upper threshold value of the relative displacement of the wheel rail under the normal operation condition, when reaching or exceeding Indicating that the wheel-rail relationship is abnormal and derailment risk exists; In order to judge that the vehicle is at extremely high derailment risk when the transverse acceleration reaches or exceeds 30g, the system needs to trigger a corresponding braking or early warning mechanism in time; The method is based on a large number of test data of railway freight car operation conditions and a critical value determined by simulation analysis, and when the acceleration in the vertical direction exceeds the threshold value, the method indicates that the freight car is subjected to abnormal vertical impact force or is subjected to severe jolt, and the derailment risk is obviously increased; In order to increase the risk of derailment of the vehicle significantly when the wheel deflection angle with respect to the track reaches 5 °.
10. The derailment brake system of railway freight car according to claim 9, wherein the step response mechanism is that when the early warning coefficient is And is also provided with Triggering pre-alarm signal and recording data when derailing risk coefficient And when the test control unit judges the derailment state, the test control unit immediately sends an emergency braking instruction to the execution unit, the time sequence consistency check adopts a 5s sliding time window, at least 3 continuous sampling points in the time window are required to meet the requirement that the parameter change trend is consistent, and otherwise, the test control unit judges the instantaneous interference and discards the group of data.

Description

Derailment braking system for railway freight car Technical Field The invention relates to the technical field of railway freight car derailment braking, in particular to a railway freight car derailment braking system. Background The conventional railway freight car derailment braking device has the technical defects that the conventional mechanical device relies on a holding shaft pull ring to collect displacement, the disassembly and assembly workload is large and the device is easy to damage during maintenance, part of electronic devices adopt a single criterion (such as acceleration or displacement only) and are easy to be misjudged and missed by line jolt and instantaneous vibration interference, a few multi-parameter fusion schemes adopt fixed weight coefficients, cannot adapt to working condition differences under different running speeds, lack of time sequence consistency verification, and are difficult to distinguish instantaneous interference from real derailment trend, and meanwhile, the conventional device has no grading response mechanism, only can realize emergency braking, cannot early warn in advance and is unfavorable for the prejudging treatment of a driver. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a railway wagon derailment braking system, which solves the problems in the background art. The derailment braking system of the railway wagon comprises a measurement and control unit, a battery unit and an execution unit, wherein the units are detachably connected through a cable with a quick connector; The measurement and control unit is arranged above the railway wagon wheel pair, is connected with a mounting seat bolt fixed on a middle beam at the bottom of the wagon body, and is used for detecting the displacement of the wagon wheel pair relative to the wagon body and outputting a braking control instruction; The battery unit is arranged close to the measurement and control unit and provides continuous power supply for the system; The execution unit is connected in series between the telecentric dust collector and the brake valve, and receives the instruction of the measurement and control unit to realize the exhaust of the train pipe. Further, each set of system is provided with 2 sets of measurement and control units, each set of system of 2 sets of battery units is provided with 4 sets of measurement and control units, 4 sets of battery units and 1 set of execution unit, and the measurement and control units are fixed with the mounting seat through 4M 10 bolts. Furthermore, the measurement and control unit realizes non-contact displacement detection based on electromagnetic induction ranging principle, the appearance is disc, and the side is equipped with cable socket, status indicator lamp and function button moreover, and the ultra-low power consumption system level chip of internal integration, chip integrated sensing, calculation, storage and communication function, and possess the intelligent power management function that dormancy when the vehicle was stationary, awakened during the motion. Furthermore, the displacement acquisition frequency of the measurement and control unit is 1Hz, the displacement acquisition frequency is 10Hz, the acquisition resolution reaches 0.01mm, and the continuous detection precision is stabilized at +/-1 mm after software filtering treatment. Furthermore, the battery unit adopts a disposable lithium-ion battery Li-SOCl 2, consists of a battery core, a protection circuit and a plastic shell, and is packaged by adopting an integrated glue filling process. Further, the execution unit is composed of a ball valve motor and a ball valve, the ball valve adopts a stainless steel ball core cutting-off plug door structure special for a railway wagon, and the ball valve motor has the functions of manual reset and electric reset. Furthermore, the glue filling process of the measurement and control unit and the battery unit adopts high-low temperature resistant epoxy pouring sealant, has no gap inside, has the anti-corrosion, dustproof and waterproof invasion capacity, and can bear the extreme mechanical vibration impact of the truck steering frame. Furthermore, the measurement and control unit is also integrated with a triaxial acceleration sensor, an inclination angle sensor and a speed acquisition module, and the precise judgment of the derailment state is realized by adopting a multi-parameter dynamic fusion algorithm, and the specific steps comprise: S1, synchronously collecting displacement variation of wheel set relative to vehicle body Lateral acceleration of vehicle bodyVertical accelerationInclination angle of wheel setVehicle running speedThe acquisition frequencies are 1Hz and 10Hz, so that the data time sequence consistency is ensured; s2, preprocessing the collected original data through a moving average filtering algorithm, wherein a filtering formula is as follows: Wherein, the In order to filter the d