Monorail crane brake pilot control hydraulic system

Abstract

The utility model belongs to the technical field of mechanical braking, and provides a monorail crane braking pilot control hydraulic system which comprises an oil pump motor set, a system overflow valve, a system one-way valve, a pilot oil one-way valve, a pressure gauge, a braking pilot control valve set, an energy accumulator, a braking oil cylinder, a hydraulic control braking main valve and an electro-hydraulic reversing valve. The oil pump motor set is arranged on an oil supply pipeline of the brake oil cylinder, a hydraulic control brake main valve and an electro-hydraulic reversing valve are arranged between the oil supply pipeline and an oil return pipeline of the brake oil cylinder, a system overflow valve is further arranged between the oil supply pipeline and the oil return pipeline of the brake oil cylinder, and a system one-way valve is further arranged on the oil supply pipeline of the brake oil cylinder. The brake pilot control valve set is connected between the system one-way valve and the electro-hydraulic directional control valve and the hydraulic control brake main valve, high-pressure pilot control oil is led out by the energy accumulator and fed into the brake pilot control valve set after passing through the pilot oil one-way valve, and the pressure gauge is arranged between the pilot oil one-way valve and the brake pilot control valve set. According to the utility model, the problem that hydraulic oil in the brake oil cylinder is slowly released and cannot be braked in time when an emergency brake ball valve is opened for emergency braking in case of emergency of the existing monorail crane locomotive is solved, and meanwhile, the problem that a speed-limiting trolley must use a large-drift-diameter inlet stop valve is solved, so that the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical braking, and relates to a braking hydraulic system for an electric traction monorail crane locomotive, in particular to a monorail crane braking pilot control hydraulic system. Background Art

[0002] With the rapid increase in domestic coal demand, coal mining has experienced significant growth, and monorail cranes offer significant advantages in transportation. However, to date, the effectiveness of monorail cranes has been suboptimal, with accidents often occurring due to slow or ineffective emergency braking. Therefore, continuous improvement and optimization of monorail crane performance are needed to ensure increased transport efficiency while maintaining safety.

[0003] When a monorail crane is currently operating in a tunnel with a steep slope and a long slope, if the monorail crane encounters an emergency, the driver operates the emergency brake ball valve in the driver's cab for emergency braking. At this time, the oil in the brake accumulator and the oil in the oil pump return to the hydraulic oil tank from the ball valve at the same time, resulting in the oil in the brake cylinder unable to release pressure in time, and the brake mechanism unable to brake and stop in time, which causes the monorail crane locomotive to slip and cause a safety accident. Utility Model Content

[0004] The purpose of the utility model is to provide a monorail crane brake pilot control hydraulic system, which can quickly relieve the pressure of the brake cylinder and return the oil to achieve the purpose of emergency braking, thereby ensuring that the monorail crane can stop immediately in an emergency and making the monorail crane safer to drive.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0006] A monorail crane brake pilot control hydraulic system includes an oil pump motor unit, a system overflow valve, a system check valve, a pilot oil check valve, a pressure gauge, a brake pilot control valve group, an accumulator, a brake cylinder, a brake hydraulic control main valve, and an electro-hydraulic reversing valve. The oil pump motor unit is arranged on the oil supply pipeline of the brake cylinder, and a brake hydraulic control main valve and an electro-hydraulic reversing valve are arranged between the oil supply pipeline and the return oil pipeline of the brake cylinder. A system overflow valve is also arranged between the oil supply pipeline and the return oil pipeline of the brake cylinder, and a system check valve is also arranged on the oil supply pipeline of the brake cylinder. The brake pilot control valve group is connected to the brake hydraulic control main valve between the system check valve and the electro-hydraulic reversing valve. The accumulator draws out high-pressure pilot control oil, which is sent into the brake pilot control valve group after passing through the pilot oil check valve. The pressure gauge is arranged between the pilot oil check valve and the brake pilot control valve group.

[0007] The brake pilot control valve group includes an emergency brake roller type reversing valve 1, a pedestrian and vehicle emergency brake roller type reversing valve, an emergency brake roller type reversing valve 2, a speed limiting trolley roller type reversing valve, and a brake valve solenoid reversing valve. The emergency brake roller type reversing valve 1, the pedestrian and vehicle emergency brake roller type reversing valve, the emergency brake roller type reversing valve 2, the speed limiting trolley roller type reversing valve, and the brake valve solenoid reversing valve are connected in series.

[0008] The beneficial effects of the utility model are: it solves the problem of slow emergency braking of the monorail crane, and when the brake pilot control hydraulic system is in emergency braking, the brake hydraulic system cuts off the main oil circuit and the high-pressure oil in the brake cylinder can be quickly depressurized and returned to the oil, and the brake mechanism can brake quickly to prevent slipping and ensure driving safety. At the same time, it solves the problem that traditional speed-limited trolleys must use large-diameter imported stop valves, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the hydraulic system of the utility model;

[0010] In the figure, 1. Oil pump motor unit; 2. System overflow valve; 3. System check valve; 4. Pilot oil check valve; 5. Pressure gauge; 6. Emergency brake roller-type reversing valve 1; 7. Passenger-vehicle emergency brake roller-type reversing valve; 8. Emergency brake roller-type reversing valve 2; 9. Speed ​​limiting trolley roller-type reversing valve; 10. Brake valve solenoid reversing valve; 11. Accumulator; 12. Brake cylinder; 13. Brake hydraulic control main valve; 14. Electro-hydraulic reversing valve. DETAILED DESCRIPTION

[0011] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0012] A monorail crane brake pilot control hydraulic system, such as Figure 1As shown, it includes an oil pump motor group 1, a system overflow valve 2, a system check valve 3, a pilot oil check valve 4, a pressure gauge 5, a brake pilot control valve group, an accumulator 11, a brake cylinder 12, a brake hydraulic control main valve 13, and an electro-hydraulic reversing valve 14. The oil pump motor group 1 is arranged on the oil supply pipeline of the brake cylinder 12, and a brake hydraulic control main valve 13 and an electro-hydraulic reversing valve 14 are arranged between the oil supply pipeline and the return pipeline of the brake cylinder 12. A overflow valve 2 is also arranged between the oil supply pipeline and the return pipeline of the brake cylinder. A system one-way valve 3 is also provided on the oil supply pipeline of the cylinder. The brake pilot control valve is connected to the brake hydraulic control main valve 13 between the system one-way valve 3 and the electro-hydraulic reversing valve 14. The accumulator 11 draws out the high-pressure pilot control oil, which is sent into the brake pilot control valve after passing through the pilot oil one-way valve 4. The pilot oil one-way valve 4 prevents the oil from flowing back and affecting the reversing of the hydraulic control valve; the pressure gauge 5 is set between the pilot oil one-way valve 4 and the brake pilot control valve. When a fault occurs in the brake hydraulic system, the pressure gauge 5 is observed to determine whether it is a pilot oil circuit fault.

[0013] The brake pilot control valve group includes an emergency brake roller type reversing valve 1 6, a pedestrian and vehicle emergency brake roller type reversing valve 7, an emergency brake roller type reversing valve 2 8, a speed limiting trolley roller type reversing valve 9, and a brake valve electromagnetic reversing valve 10, and each pilot control valve is connected in series.

[0014] The monorail crane brake pilot control hydraulic system draws out high-pressure pilot control oil from the accumulator 11 and passes through the pilot oil one-way valve 4 and then is sent to the emergency brake roller type reversing valve 1 6 of the first driver's cab, the emergency brake roller type reversing valve 7 of the vehicle, the emergency brake roller type reversing valve 2 8 of the second driver's cab, the speed limit trolley roller type reversing valve 9, and the brake valve solenoid reversing valve 10. The pilot oil enters the brake hydraulic control main valve 13, the brake hydraulic control main valve 13 valve core moves, the brake cylinder moves, the brake mechanism is released, and the monorail crane starts to travel. Due to the emergency brake roller type reversing valve 1 6 of the first driver's cab, the emergency brake roller type reversing valve 7 of the vehicle, the emergency brake roller type reversing valve 2 8 of the second driver's cab, the speed limit trolley roller type reversing valve The directional valve 9 and the brake valve solenoid reversing valve 10 are connected in series, so when an emergency occurs, any one of the pilot control valves is triggered, and the pilot control oil of the brake hydraulic control main valve quickly returns to the hydraulic oil tank through the pilot control valve, and the amount of hydraulic valve pilot control oil is very small, and the pilot control oil of the brake hydraulic control main valve can be quickly depressurized. After the pilot control oil returns, the valve core of the brake hydraulic control main valve 13 quickly reverses under the action of the reset spring, thereby cutting off the oil from the brake hydraulic control main valve 13P port, that is, the oil from the accumulator 11 and the oil pump is no longer supplied to the brake cylinder 12. At the same time, the pressure oil in the brake cylinder 12 quickly returns to the brake hydraulic control main valve 13 to depressurize, and the brake mechanism brakes quickly to ensure the safety of the monorail crane during operation.

[0015] The utility model effectively solves the problem that when the emergency brake ball valve is opened for emergency braking in an emergency situation, the hydraulic oil pressure in the brake cylinder of the existing monorail crane locomotive is slowly released and the brake cannot be applied in time. At the same time, the speed limiting trolley stop valve no longer needs to use a large-diameter imported stop valve, which greatly reduces the production cost. The production cycle of the monorail crane is no longer affected by the supply cycle of the imported stop valve.

[0016] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A monorail crane brake pilot control hydraulic system, characterized by: It includes an oil pump motor group, a system overflow valve, a system check valve, a pilot oil check valve, a pressure gauge, a brake pilot control valve group, an accumulator, a brake cylinder, a brake hydraulic control main valve, and an electro-hydraulic reversing valve. The oil pump motor group is arranged on the oil supply pipeline of the brake cylinder, and a brake hydraulic control main valve and an electro-hydraulic reversing valve are arranged between the oil supply pipeline and the return oil pipeline of the brake cylinder. A system overflow valve is also arranged between the oil supply pipeline and the return oil pipeline of the brake cylinder, and a system check valve is also arranged on the oil supply pipeline of the brake cylinder. The brake pilot control valve group is connected to the brake hydraulic control main valve between the system check valve and the electro-hydraulic reversing valve. The accumulator draws out high-pressure pilot control oil, which is sent into the brake pilot control valve group after passing through the pilot oil check valve. The pressure gauge is arranged between the pilot oil check valve and the brake pilot control valve group.

2. A monorail crane brake pilot control hydraulic system according to claim 1, characterized in that: The brake pilot control valve group includes an emergency brake roller type reversing valve 1, a pedestrian and vehicle emergency brake roller type reversing valve, an emergency brake roller type reversing valve 2, a speed limiting trolley roller type reversing valve, and a brake valve solenoid reversing valve. The emergency brake roller type reversing valve 1, the pedestrian and vehicle emergency brake roller type reversing valve, the emergency brake roller type reversing valve 2, the speed limiting trolley roller type reversing valve, and the brake valve solenoid reversing valve are connected in series.

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