Air path brake system of railroad tractor

Abstract

The utility model relates to the technical field of brake control of highway-railway dual-purpose tractors, in particular to a gas circuit brake system of a railroad tractor. According to the technical scheme, a combined type air storage tank is arranged and connected to a brake air cylinder through a brake air pipe, an air compressor is connected with the combined type air storage tank through a filter and a first pipeline, the combined type air storage tank is provided with two sets of air outlet pipelines, and the first air outlet pipeline is sequentially provided with a first electromagnetic valve and an air cut-off brake mechanism. A pressure regulating valve, a second electromagnetic valve and an air inlet end of a six-way valve are sequentially arranged on the first air outlet pipeline, the six-way valve is provided with four groups of air outlet ends, two groups of air outlet ends are respectively connected with two groups of brake air pipes, one group of air outlet ends is connected with a second pipeline, a third electromagnetic valve is arranged on the second pipeline, and the tail end is connected with a pressure retaining valve. According to the device, air path braking can be carried out on the road-rail car, and the redundancy control safety performance is high; and the air pressure control modes are multiple, and the device can be used on various rail tractors.

Description

Technical Field

[0001] The invention relates to the technical field of brake control for road-rail dual-purpose tractors, and in particular to an air circuit brake system for rail tractors. Background Art

[0002] The braking system (brake equipment) is the general term for all braking and deceleration systems installed in a car. Its function is to slow down or stop a moving car, or to keep a stopped car stationary. Since the structure and performance of the braking system are directly related to the safety of the vehicle and personnel, it is considered an important safety part of the car and is widely valued.

[0003] Braking control devices are generally used for locomotive brakes, which can achieve train speed reduction, normal braking, and emergency braking. The current road-rail dual-use vehicle braking system on the market includes train braking, which is divided into electric braking and air braking. Electric braking is further divided into regenerative braking and resistance braking. The so-called electric braking is the braking of the traction system. To brake a car, you must first release the accelerator to stop the car from providing power. The subway train is a traction system that no longer supplies power to the traction motor, which is electric braking. Air braking mainly uses the air pressure of the cylinder to perform some mechanical actions, and finally achieves braking through the friction of the brake shoe against the wheel hub.

[0004] The rail tractor's air circuit control safety redundancy is insufficient. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a device which is simple to operate, realizes the control of multiple brake air pressures, and improves the safety redundancy during emergency braking.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a rail tractor air circuit brake system, which is provided with a combined air tank, which is connected to a brake air cylinder through a brake air duct, and is characterized in that: it also includes an air compressor, which is connected to the combined air tank through a first pipeline via a filter, and the combined air tank is provided with two groups of air outlet pipelines, the first air outlet pipeline is provided with a first solenoid valve and an air cut-off brake mechanism in sequence, the first air outlet pipeline is provided with a pressure regulating valve, a second solenoid valve, and an air inlet end of a six-way valve in sequence, the six-way valve is provided with four groups of air outlet ends, two groups of air outlet ends are respectively connected to two groups of brake air ducts, one group of air outlet ends is connected to a second pipeline, a third solenoid valve is provided on the second pipeline, the end is connected to a pressure-maintaining valve, and one group of air outlet ends is connected to a fourth solenoid valve through an air outlet pipeline.

[0008] According to the rail tractor air circuit brake system, an air pressure sensing plug is also provided at the six-way valve.

[0009] According to the air circuit brake system of a rail tractor, a manual valve is provided on the brake air duct.

[0010] According to the air circuit brake system of a rail tractor, when the pressure of the combined air storage tank is lower than 0.6MPa, the air compressor automatically starts, and when the pressure of the combined air storage tank recovers to 0.75MPa, the air compressor automatically stops after unloading for a period of time.

[0011] The utility model has the advantages that: the device can perform air circuit braking on a road-rail dual-purpose vehicle, and has high control redundancy safety performance; there are multiple air pressure control modes, and the device can be used on a variety of rail tractors. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the gas circuit wiring diagram of the utility model;

[0013] Figure numerals: 1. air compressor, 2. combined air storage tank, 3. pressure regulating valve, 41. first solenoid valve, 42. second solenoid valve, 43. third solenoid valve, 44. fourth solenoid valve, 5. air pressure sensing plug, 6. brake air duct, 7. air brake, 8. pressure maintaining valve, 9. filter element, 10. six-way valve, 11. first pipeline, 12. second pipeline, 13. first air outlet pipe, 14. second air outlet pipe, 15. manual valve. DETAILED DESCRIPTION

[0014] The preferred examples of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred examples described herein are only used to illustrate and explain the present invention, and do not limit the present invention.

[0015] As shown in the figure, a rail tractor air circuit brake system is used for rail tractor air circuit brake.

[0016] The device is connected to the brake cylinder to provide the brake cylinder with brake high-pressure gas.

[0017] Specifically, a combined air storage tank 2 and an air compressor 1 are provided. The combined air storage tank 2 is connected to the brake air cylinder through a brake air duct, and the air compressor 1 is connected to the combined air storage tank 2 through a filter through a first pipeline.

[0018] The combined gas storage tank 2 is provided with two sets of gas outlet pipelines. The first gas outlet pipeline is provided with the first solenoid valve 41 and the air cut-off brake mechanism 7 in sequence, and the second gas outlet pipeline is provided with the pressure regulating valve 3, the second solenoid valve 42, and the gas inlet end of the six-way valve in sequence.

[0019] The six-way valve is provided with four sets of air outlet ends, two sets of air outlet ends are respectively connected to two sets of brake air ducts, one set of air outlet ends is connected to the second pipeline, a third solenoid valve is arranged on the second pipeline, and the end is connected to a pressure maintaining valve, and one set of air outlet ends is connected to the fourth solenoid valve through the air outlet pipeline. The solenoid valve is used for manual control of emergency pressure relief and is controlled in the control room.

[0020] A gas pressure sensing plug 5 is also provided at the six-way valve. When the warning pressure is reached, the gas pressure sensing plug 5 will be deflated to control the gas pressure in the combined gas storage tank 2 .

[0021] A manual valve is installed on the brake air duct to manually control the on and off of the air pressure at the brake cylinder of the tractor for emergency on and off purposes.

[0022] When the pressure of the combined air storage tank 2 of the device is lower than 0.6MPa, the air compressor 1 automatically starts, and when the pressure of the combined air storage tank 2 recovers to 0.75MPa, the air compressor 1 automatically stops after a period of unloading.

[0023] The main function of the filter in this device is to filter out impurities entering the system and prevent impurities from entering the gas cylinder, causing the impurities in the gas cylinder to block the gas outlet pipeline, so as to ensure the normal operation of the system and extend the service life of the equipment.

[0024] The combined air storage tank 2 is a supporting device of the air compressor 1 and is installed outside. The air enters the compressor 1 and is sent into the combined air storage tank 2 after being pressurized.

[0025] When emergency braking is required, press the emergency stop button to control the opening of the fourth solenoid valve, directly connect the air duct to the atmosphere, release the brake cylinder pressure, cut off the air brake mechanism for emergency braking, and the train pipe pressure drops from 600kPa to 400kPa in ≤3s.

[0026] It should be noted that the directions or positional relationships indicated by terms such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the state or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

Claims

1. A rail tractor air circuit brake system, comprising a combined air storage tank (2), the combined air storage tank (2) being connected to a brake air cylinder via a brake air duct, characterized in that: The invention also comprises an air compressor (1), the air compressor (1) is connected to a combined air storage tank (2) through a filter via a first pipeline, the combined air storage tank (2) is provided with two sets of air outlet pipelines, the second air outlet pipeline is provided with a first solenoid valve (41) and an air cut-off brake mechanism (7) in sequence, the first air outlet pipeline is provided with a pressure regulating valve (3), a second solenoid valve (42), and an air inlet end of a six-way valve in sequence, the six-way valve is provided with four sets of air outlet ends, two sets of air outlet ends are respectively connected to two sets of brake air ducts, one set of air outlet ends is connected to a second pipeline, a third solenoid valve is provided on the second pipeline, the end of which is connected to a pressure-maintaining valve, and one set of air outlet ends is connected to a fourth solenoid valve via an air outlet pipeline.

2. A rail tractor air circuit brake system according to claim 1, characterized in that: An air pressure sensing plug (5) is also provided at the six-way valve.

3. A rail tractor air circuit brake system according to claim 1, characterized in that: A manual valve is arranged on the brake air duct.

4. A rail tractor air circuit brake system according to claim 1, characterized in that: When the pressure of the combined air storage tank (2) is lower than 0.6 MPa, the air compressor (1) automatically starts, and when the pressure of the combined air storage tank (2) recovers to 0.75 MPa, the air compressor (1) automatically stops after a period of unloading.

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