Mine wide-body dumper steering and lifting mutual rescue hydraulic system
By introducing the two-position three-way solenoid valve DT10, cartridge valve, two-position two-way solenoid valve DT9 and two-position two-way solenoid valve DT8 into wide-body mining dump trucks, mutual rescue of the steering and lifting systems is achieved, solving the problems of low emergency steering flow and dangerous switching during emergency lifting and disembarking, and improving the vehicle's operational safety and maintainability.
Patent Information
- Application Number
- CN202422240575.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The steering system and lifting system of existing wide-body dump trucks in mines are independent of each other, resulting in small emergency steering flow and short cruising range, and there is a danger in switching the emergency valve when getting off the vehicle for emergency lifting.
A steering and lifting mutual rescue hydraulic system for wide-body dump trucks in mining is designed. By adding a two-position three-way solenoid valve DT10, a cartridge valve, a two-position two-way solenoid valve DT9 and a two-position two-way solenoid valve DT8, a steering and lifting mutual rescue function is formed, realizing mutual rescue of hydraulic oil between the steering and lifting systems.
It improves the safety and dispatchability of vehicle operation, ensures that the vehicle can still steer and lift normally in the event of a fault, and improves the maintainability of the vehicle.
Smart Images
Figure CN223398986U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dump trucks, in particular to a steering, lifting and mutual rescue hydraulic system for a wide-body dump truck in a mine. Background Art
[0002] Domestic mining is currently experiencing rapid growth, and a wide variety of mining machinery is also flourishing. Pure electric wide-body dump trucks are highly favored by major mines due to their light weight, large payload capacity, and environmentally friendly features. A reliable steering system ensures safe operation of pure electric wide-body dump trucks; a reliable lifting system ensures their continued operation and maintainability.
[0003] The existing steering and lifting systems are independent and do not interfere with each other. They provide emergency steering in the event of a steering pump failure; the lifting system also has an emergency lift function, which requires the driver to exit the vehicle and manually switch the emergency valve after the failure occurs. The existing hydraulic system has the following drawbacks: a. If the vehicle's steering system fails, it will be forced to stop, and the emergency steering system's flow rate is very low, making it inadequate for quick avoidance of sharp turns; b. The emergency steering system relies on a lead-acid battery, which has a short service life and is not suitable for long-distance towing; c. If the vehicle's lifting system fails, exiting the vehicle to switch the emergency valve poses a risk. Summary of the Invention
[0004] The technical problem to be solved by the utility model is to provide a steering, lifting and mutual rescue hydraulic system for wide-body dump trucks in mines, which solves the problems of small emergency steering flow and short driving range; and solves the problem of emergency lifting and disembarking switching emergency valves.
[0005] In order to solve the above technical problems, the technical solution of the utility model is: a hydraulic system for steering, lifting and mutual rescue of wide-body dump trucks in mines, including a lifting pump, an oil tank and a steering pump, and also including a two-position three-way solenoid valve DT10, a cartridge valve, a two-position two-way solenoid valve DT9 and a two-position two-way solenoid valve DT8; one end of the two-position two-way solenoid valve DT8 is connected to the oil outlet of the lifting pump, and the other end of the two-position two-way solenoid valve DT8 is connected to the oil inlet of the high-pressure filter, and a one-way valve is provided between the high-pressure filter and the steering pump to prevent the hydraulic oil output by the lifting pump from flowing back to the oil tank. Valve; the cartridge valve and the two-position two-way solenoid valve DT9 are combined to form a rescue valve group, the front oil inlet of the rescue valve group is connected to the oil outlet of the lifting pump and in parallel with the two-position two-way solenoid valve DT8, and the rear oil outlet of the rescue valve group is connected in parallel with the hydraulic pipe connected to the normally closed oil port of the two-position three-way solenoid valve DT10; the oil inlet of the two-position three-way solenoid valve DT10 is connected to the EF port of the priority valve, the normally closed oil port of the two-position three-way solenoid valve DT10 is connected in parallel with the rescue valve group and then connected to the oil inlet of the lifting valve, and the normally open oil port of the two-position three-way solenoid valve DT10 is connected to the oil inlet of the electromagnetic proportional valve group. Principle of the utility model: When the steering pump or the steering motor fails, the driver presses the steering rescue switch, the two-position two-way solenoid valve DT9, the two-position two-way solenoid valve DT8, and the lifting motor are all energized and the lifting motor runs at a lower speed, and the hydraulic oil pumped out by the lifting pump flows into the steering system through the two-position two-way solenoid valve DT8, flows through the high-pressure filter and the priority valve, and then enters the steering gear or the electromagnetic proportional valve group, and finally enters the steering cylinder to push the wheel to steer; when the lifting pump or the lifting motor fails and lifting is required, the driver presses the lifting rescue switch, the two-position three-way solenoid valve DT10 is energized, and the hydraulic oil pumped out by the steering pump flows into the lifting system through the two-position three-way solenoid valve DT10.
[0006] As an improvement, the cartridge valve and the two-position two-way solenoid valve DT9 are connected in parallel through the front and rear ends of the oil passage, and the control port of the cartridge valve is connected to the oil outlet of the two-position two-way solenoid valve DT9.
[0007] As an improvement, the P port of the priority valve is connected to the high-pressure filter, and the CF port of the priority valve is connected to the steering gear.
[0008] As an improvement, the oil inlet at the front end of the steering gear is connected to the priority valve, and the oil outlet at the rear end of the steering gear is connected to the steering cylinder and the hydraulic oil tank.
[0009] As an improvement, the front oil inlet of the electromagnetic proportional valve group is connected to the two-position three-way solenoid valve DT10, and the rear oil outlet of the electromagnetic proportional valve group is connected to the steering cylinder and the hydraulic oil tank.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] A two-position three-way solenoid valve DT10, a cartridge valve, a two-position two-way solenoid valve DT9 and a two-position two-way solenoid valve DT8 are added to the steering system and the lifting system to form a steering and lifting mutual rescue function; the steering rescue function can greatly improve the safety of vehicle operation, that is, when the steering rescue function is used, the steering system still has the ability to steer normally; the lifting rescue function can improve the vehicle's dispatchability, that is, when the lifting pump fails and the vehicle is missing, the vehicle can be allowed to run to a rest interval and then repaired, thereby improving production capacity; the lifting rescue function can also improve the vehicle's maintainability, that is, when the vehicle's high-voltage electricity fails and the components in the middle of the frame at the bottom of the cargo compartment need to be replaced, it still has the ability to lift the cargo compartment. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is the pipeline diagram of this utility model. DETAILED DESCRIPTION
[0013] The present invention will be further described below in conjunction with the accompanying drawings.
[0014] like Figure 1 As shown, a hydraulic system for steering, lifting and mutual rescue of wide-body dump trucks in a mine includes a lifting pump 10, an oil tank 1, a steering pump 3, a two-position three-way solenoid valve DT10, a cartridge valve 11, a two-position two-way solenoid valve DT9 and a two-position two-way solenoid valve DT8. One end of the two-position two-way solenoid valve DT8 is connected to the oil outlet of the lifting pump 10, and the other end of the two-position two-way solenoid valve DT8 is connected to the oil inlet of the high-pressure filter 4. A one-way valve is provided between the high-pressure filter 4 and the steering pump 3 to prevent the hydraulic oil output by the lifting pump 10 from flowing back to the oil tank 1; the cartridge valve 11 and the two-position two-way solenoid valve DT9 are combined to form a rescue valve group, and the cartridge valve 11 and the two-position two-way solenoid valve DT9 are connected in parallel through the front and rear ends of the oil channel, and the control port of the cartridge valve 11 is connected to the oil outlet of the two-position two-way solenoid valve DT9; the front oil inlet of the rescue valve group is connected to the oil outlet of the lifting pump 10 and in parallel with the two-position two-way solenoid valve DT8, and the rear oil outlet of the rescue valve group is connected to the two-position three-way solenoid valve DT 10 normally closed oil port is connected in parallel with the hydraulic pipe; the oil inlet of the two-position three-way solenoid valve DT10 is connected to the EF port of the priority valve 5, the normally closed oil port of the two-position three-way solenoid valve DT10 is connected in parallel with the rescue valve group and then connected to the oil inlet of the lifting valve 9, and the normally open oil port of the two-position three-way solenoid valve DT10 is connected to the oil inlet of the electromagnetic proportional valve group 8; the P port of the priority valve 5 is connected to the high-pressure filter 4, and the CF port of the priority valve 5 is connected to the steering gear 6; the front end oil inlet of the steering gear 6 is connected to the priority valve 5, and the rear end oil outlet of the steering gear 6 is connected to the steering cylinder 7 and the hydraulic oil tank 1; the front end oil inlet of the electromagnetic proportional valve group 8 is connected to the two-position three-way solenoid valve DT10, and the rear end oil outlet of the electromagnetic proportional valve group 8 is connected to the steering cylinder 7 and the hydraulic oil tank 1.
[0015] like Figure 1As shown, under normal operation, the steering system's hydraulic oil is supplied by steering pump 3, and both the 2-position, 2-way solenoid valve DT9 and the 2-position, 2-way solenoid valve DT8 are de-energized. If the steering pump 3 or steering motor fails, the driver presses the steering rescue switch. The 2-position, 2-way solenoid valve DT9, 2-position, 2-way solenoid valve DT8, and the lift motor are all energized, and the lift motor operates at a lower speed. Hydraulic oil pumped by lift pump 10 flows through 2-position, 2-way solenoid valve DT8 into the steering system, passing through high-pressure filter 4 and priority valve 5, and then into the steering gear 6 or solenoid proportional valve assembly 8, ultimately entering the steering cylinder 7 to steer the wheels. This function requires that the vehicle's high-voltage power is available when the steering pump 3 fails, and that the lift pump 10 and lift motor are not faulty. If both the lift pump 10 and steering pump 3 fail and steering is required, the emergency steering switch can be pressed for a short period of time.
[0016] like Figure 1 As shown, under normal operation, the hydraulic oil of the lifting system is supplied by the lifting pump 10, and the two-position three-way solenoid valve DT10 is in the de-energized state. If the lifting pump 10 or the lifting motor fails and lifting is required, the driver presses the lift rescue switch, energizing the two-position three-way solenoid valve DT10. The hydraulic oil pumped from the steering pump 3 flows through the two-position three-way solenoid valve DT10 into the lifting system. When the lifting handle is moved to the lift position or the lift switch is pressed, the hydraulic oil flows through the lift valve 9 into the lifting cylinder, achieving an emergency lift. If both the lifting pump 10 and the steering pump 3 fail and lifting is required, the emergency steering switch and the lift rescue switch can be pressed. At this time, the hydraulic oil pumped from the emergency steering pump 2 can enter the lifting system to achieve the lifting action.
[0017] Working principle of cartridge valve 11: Under normal circumstances, the two-position, two-way solenoid valve DT9 is in the de-energized state. Ports P and C of cartridge valve 11 are blocked. Hydraulic oil entering port P can overcome the spring pressure to push open the valve core and flow out from port A. If hydraulic oil flows in from port A, it will also flow to port C. Because the valve core area at the port C end of the valve core is larger than that at the port A end, the hydraulic oil cannot push open the valve core, thus achieving unidirectional conduction of cartridge valve 11. When the solenoid valve DT9 is energized, ports C and P are connected. At this time, the valve core area at the port C end is larger than that at the port A end, and the hydraulic oil cannot push open the valve core, thus blocking the flow of hydraulic oil.
Claims
1. A hydraulic system for steering, lifting and mutual rescue of wide-body dump trucks in mines, comprising a lifting pump, a fuel tank and a steering pump, characterized in that: It also includes a two-position three-way solenoid valve DT10, a cartridge valve, a two-position two-way solenoid valve DT9 and a two-position two-way solenoid valve DT8; one end of the two-position two-way solenoid valve DT8 is connected to the oil outlet of the lifting pump, and the other end of the two-position two-way solenoid valve DT8 is connected to the oil inlet of the high-pressure filter. A one-way valve is provided between the high-pressure filter and the steering pump to prevent the hydraulic oil output by the lifting pump from flowing back into the oil tank; the cartridge valve and the two-position two-way solenoid valve DT9 are combined to form a rescue valve group, the front oil inlet of the rescue valve group is connected to the oil outlet of the lifting pump and in parallel with the two-position two-way solenoid valve DT8, and the rear end oil outlet of the rescue valve group is connected in parallel with the hydraulic pipe connected to the normally closed oil port of the two-position three-way solenoid valve DT10; the oil inlet of the two-position three-way solenoid valve DT10 is connected to the EF port of the priority valve, the normally closed oil port of the two-position three-way solenoid valve DT10 is connected in parallel with the rescue valve group and then connected to the oil inlet of the lifting valve, and the normally open oil port of the two-position three-way solenoid valve DT10 is connected to the oil inlet of the electromagnetic proportional valve group.
2. The steering, lifting and mutual rescue hydraulic system for wide-body dump trucks in mining according to claim 1 is characterized by: The cartridge valve and the two-position two-way solenoid valve DT9 are connected in parallel through the front and rear ends of the oil passage, and the control port of the cartridge valve is connected to the oil outlet of the two-position two-way solenoid valve DT9.
3. The steering, lifting and mutual rescue hydraulic system for wide-body dump trucks in mining according to claim 1 is characterized in that: The P port of the priority valve is connected to the high-pressure filter, and the CF port of the priority valve is connected to the steering gear.
4. The steering, lifting and mutual rescue hydraulic system for wide-body dump trucks in mining according to claim 1 is characterized in that: The oil inlet at the front end of the steering gear is connected to the priority valve, and the oil outlet at the rear end of the steering gear is connected to the steering cylinder and the hydraulic oil tank.
5. The steering, lifting and mutual rescue hydraulic system for wide-body dump trucks in mining according to claim 1 is characterized by: The front oil inlet of the electromagnetic proportional valve group is connected to the two-position three-way solenoid valve DT10, and the rear oil outlet of the electromagnetic proportional valve group is connected to the steering cylinder and the hydraulic oil tank.