CN100398372C

CN100398372C - Method and apparatus for detecting and controlling railway freight-car derailment

Info

Publication number: CN100398372C
Application number: CNB2004100704222A
Authority: CN
Inventors: 徐春广; 孟凡武; 周世圆
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2004-08-04
Filing date: 2004-08-04
Publication date: 2008-07-02
Anticipated expiration: 2024-08-04
Also published as: CN1730335A

Abstract

The present invention relates to a detection method based on a mechanical vibration acceleration detection principle and used for a derailing state of a railway freight train, and a brake control device for preventing the freight train from overturning. The whole measuring device is composed of a valve body, a spring, a conical valve rod, a pneumatic control reversing valve, etc. The present invention has the advantage of simple structure and convenient operation. The detection control device can be arranged on the freight train body. A quality spring damping system formed by the valve rod and the spring in the device is used for detecting the change of the vertical vibration accelerated speed of the freight train so as to detect the derailing state of the freight train. Simultaneously, one pneumatic control reversing valve connected with the original brake pipe of the freight train is used for realizing the decompression brake of the freight train. The present invention can be used for detecting freight train derailment, and can be also used for overturn prevention and brake control of other wheeled vehicles (such as highway transportation vehicles) in operation.

Description

Railway freight-car derailment detection and control method and device

Technical field

Patent of the present invention relates to a kind of braking force control system of overturning based on the method for measurement that is used for the railway freight-car derailment state and the prevention lorry of mechanical vibration acceleration detection principle.

Background technology

At present, China is except that targetedly the special fixedly driving of railway truck section is installed the fixed derail autoalarm in ground, automatic checkout equipment is not installed on most Crane Rails, because this type automatic checkout equipment can not be all installed in economy and practical operation on the railway in the whole nation.Because the single-unit lorry is not charged work when operation, only depend on the traction of machinery hook, realize braking by the pressurized air decompression simultaneously, therefore, on the basis that does not change original operation scheme of lorry and structure, the lorry derailing detects and can only rely on pure mechanical system to realize.Also do not find at present simple and practical method of inspection and the detecting device that can install with car, monitoring device or instrument and equipment that the derailing state of lorry is detected and in time reports to the police and stop.

Summary of the invention

In order to adapt to existing lorry operation scheme and structure, realize on the basis that does not increase electric power that to lorry derailing status detection and control patent of the present invention has been described a kind of measurement and braking method and detection of developing and braking force control system that detects lorry derailing running state based on mechanical vibration acceleration detection principle on the method basis.The acceleration analysis sensor that utilizes on the one hand spring-conical valve stem-damper to constitute, the vertical shake acceleration/accel of the displacement detecting lorry by conical valve stem; On the other hand, gas passage by conical valve stem and damping hole formation, the Pneumatic reversal valve control signal is provided, make change-over valve when control signal reaches setting pressure, in time commutate, the admission port of change-over valve communicates with exhausr port, realize the pressurized air step-down of brake piping, make the lorry decompression brake.This railway freight-car derailment detection and the braking force control system developed are simple in structure, easy to operate, can realize the measurement to lorry derailing vertical shake acceleration condition, and decompression braking in time.

Description of drawings

Fig. 1 and Fig. 2 are this measurement and control method and Device Testing and structural principle scheme drawing.The derailing of Fig. 1 lorry detects and control setup structure cutaway view, and the derailing of Fig. 2 lorry detects and the control setup top plan view.

The specific embodiment

The method of inspection of this detecting device and control structure principle schematic are as depicted in figs. 1 and 2.When lorry was normally exercised, because the vertical shake acceleration/accel is very little, conical valve stem 2 was under spring 3 effects, and with the restriction sealing, restriction is in closed state; Gas communicates with atmosphere by damping hole in the air chamber, is in low-pressure state; Piston 14 and spool 12 are positioned at the front end end position under the effect of retracing spring and gaseous tension, be in closed condition, and admission port and exhausr port are obstructed.

When lorry because through situations such as passageway fork or hooks, can produce bigger vibration, the vertical shake acceleration/accel of lorry has bigger increase, also vibration thereupon of valve body 1 grade of Lian Jieing with it, conical valve stem 2 in the device is under the effect of acceleration/accel, produce force of inertia, when force of inertia during greater than spring force and air resistance, conical valve stem 2 upward movements.Conical valve stem 2 produces less displacement under the effect of acceleration/accel, the conical valve stem catch gear is not had an effect, the interrupted conducting of cutoff port, the pressurized air in the brake piping intermittently enters in the air chamber by cutoff port, and the damping hole on the air chamber is discharged the gas in the air chamber simultaneously.During gas flow that the gas flow that enters air chamber is discharged less than damping hole, air chamber pressure is lower than setting pressure, and piston 14 and spool 12 can not move, and change-over valve still is in closed condition.

When derailing takes place, wheel is exercised on sleeper, produce high vibration, the vertical shake acceleration/accel of lorry sharply increases, if acceleration/accel surpasses setting threshold, the displacement of conical valve stem 2 surpasses when limiting the position, position-limited lever 4 is had an effect, block conical valve stem 2, make conical valve stem 2 not move down, restriction is in normal open state.The pressurized air of being come by brake piping enters in the air chamber by restriction.Enter the gas of the gas flow of air chamber greater than the damping hole discharge, the air chamber internal pressure reaches setting pressure very soon.Under the gaseous tension effect of piston 14 in air chamber, overcome the elastic force of retracing spring 10 and the gaseous tension and the leak free friction force of spool 12 lower ends, begin to move down, make spool 12 move down, in case spool 12 displacements surpass setpoint distance, admission port and exhausr port conducting thereupon, the rapid exhaust to atmosphere of pressurized air in the brake piping, gaseous tension in the brake piping descends rapidly, forms the step-down braking, makes train stop.

Circular groove when spool 12 bottoms arrives locking lever 9 places, and locking lever 9 blocks spool 12, and spool 12 can't continue to move.Like this after the air chamber internal pressure descends, the application force of spring is during greater than the gas load on spool 12 tops and seal friction power, and spool 12 also can't automatically reset, and prevents that lorry from alleviating automatically.After trouble-shooting,, conical valve stem 2 and change-over valve core 12 and piston 14 are automatically reset by manually unpluging position-limited lever 4 and locking lever 9.

The operation pressure different to lorry, monitoring device can divide into groups, the construction parameter of monitoring device on the same group is not different, therefore not on the same group the monitoring device size and the parameter size of each assembly also different.

With said apparatus and truck body affixed (but bolt up), vertically upward.Simultaneously, the admission port on this device connects by the original brake pipe of pipeline and lorry.When lorry derailed, the vertical shake acceleration change of wheel was reflected in the displacement of conical valve stem 2.Pressurized air in the brake pipe enters air chamber by restriction, makes spool 12 actions with admission port and exhausr port conducting, to realize the pressurized air step-down braking in the brake pipe.Compressed-air actuated variation simultaneously is reflected on the bridge instrumentation, and driver is in time taken measures, handling failure.

Claims

1. a railway freight-car derailment detects and control method, comprises and detects step and controlled step, it is characterized in that,

Detect in the step,

The acceleration analysis sensor that utilizes spring (3)-conical valve stem (2)-damping needle-valve core (7) to constitute, the vertical shake acceleration/accel of the displacement detecting lorry by conical valve stem (2);

In the controlled step,

When the vertical shake acceleration/accel seals restriction or interrupted conducting under the effect of spring (3) than hour conical valve stem (2); Change-over valve is in closed condition when restriction seals; During gas flow that passing through of coming when the interrupted conducting of restriction and in by the brake piping compressed air require that restriction enters air chamber is discharged less than the damping hole that matches with damping needle-valve core (7), change-over valve still is in closed condition;

When the vertical shake acceleration/accel less, interrupted conducting of restriction and the compressed air require that enters air chamber are greater than the gas flow of discharging, perhaps the displacement of conical valve stem (2) surpasses and enters the gas flow of the compressed air require of air chamber greater than discharge when limiting the position and therefore being in normal open state by the position restriction that position-limited lever (4) limits conical valve stem (2) when the vertical shake acceleration/accel reaches certain numerical value, both of these case lower chamber internal gas pressure rises and the Pneumatic reversal valve control signal is provided thus, change-over valve in time commutates when control signal reaches setting pressure, the admission port of change-over valve communicates with exhausr port, realize the pressurized air step-down of brake piping, make the lorry decompression brake, auto lock after latching device (9) on the change-over valve makes change-over valve move simultaneously, must manually remove, prevent that lorry from alleviating automatically.

2. implement that railway freight-car derailment as claimed in claim 1 detects and the device of control method for one kind, it is characterized in that, this device comprises railway freight-car derailment detecting device and control setup, detecting device comprises spring (3), conical valve stem (2), damping needle-valve core (7), control setup comprises air chamber and by piston (14), spool (12), the change-over valve that retracing spring (10) and valve pocket (13) constitute, wherein, piston (14) and spool (12) axially link along valve pocket (13), and can in valve pocket (13), slide, valve pocket is formed with admission port and exhausr port on (13), detecting device detects vertical shake and provides the Pneumatic reversal valve control signal by air chamber to change-over valve, move under the effect of the piston in the control setup (14) and spool (12) gaseous tension in air chamber, be communicated with admission port and exhausr port, implement braking, wherein, the opposite sense application of force of retracing spring (10) gaseous tension direction in the air chamber that is subjected to it to piston (14) and spool (12).