The invention relates to a multi-load hydraulic sensing system for single-power source and multi-system working, comprising a main liquid-control handle, an assistant liquid-control handle a load-sensitive variable pump, a load-sensing main steerer, a load-sensing assistant steerer, a front wheel steering oil cylinder, a back wheel steering oil cylinder, a front wheel hydraulic motor, a back wheel hydraulic motor and an operation actuating mechanism, wherein the load-sensitive variable pump is connected with a PVG multipath integrated valve, and the PVG multipath integrated valve is respectively connected with the main liquid-control handle and the assistant liquid-control handle, the front wheel steering oil cylinder and the rear wheel steering oil cylinder, and the operation actuating mechanism and also respectively connected with the load-sensing main steerer and the load-sensing assistant steerer through an anti-explosion two-position three-way electromagnetic valve; the load-sensing main steerer is connected with the front wheel steering oil cylinder, the load-sensing assistant steerer is connected with the back wheel steering oil cylinder, and the front wheel steering oil cylinder and the back wheel steering oil cylinder are connected through a three-position four-way electromagnetic valve; and a posture-adjusting valve and an anti-explosion two-position four-way electrohydraulic valve are arranged between the front wheel hydraulic motor and the back wheel hydraulic motor. The multi-load hydraulic sensing system can realize single-pump oil supply of a running system, a steering system and an operation actuating mechanism, and can also realize electric explosion prevention, two-way driving and all-around steering of the hydraulic system.

Multi-load hydraulic sensing system for single-power source and multi-system working

The invention discloses a two-man ladle transportation vehicle, which relates to the technical field of a transportation vehicle and comprises a weighing system and a tilting prevention device, wherein the weighing system comprises a weighing sensor, an installing module, a weighing controller and a weight information display screen, the weighing sensor is arranged at the lower end of a two-man ladle platform of the two-man ladle transportation vehicle through the installing module, the weighing controller is respectively connected with the weighing sensor and the weight information display screen, and the tilting prevention device is arranged at the periphery of the two-man ladle platform. The invention provides a new transfer tool for the steel ladle transportation in a factory, and thetwo-man ladle transportation vehicle is improved, so the two-man ladle transportation vehicle has the weighing and tilting prevention function, a power storage battery device is used as motive power,the static hydraulic transmission is adopted, a lifting function and a multi-mode steering function are realized, the two-man ladle transportation vehicle belongs to a tire type transportation devicerealizing wireless communication of central control instructions and vehicle-mounted information, the two-man ladle transportation vehicle is environmental-friendly and does not cause pollution, and the conveyance work of magnesium chloride high-temperature melt is completed under the condition of ensuring the safety.

Two-man ladle transportation vehicle

The invention relates to a control system, in particular to a hydraulic brake device, which is characterized by comprising a hydraulic valve, a gear pump, a motor, an overflow valve, an electromagnetic valve and an energy accumulator. The gear pump is connected to the hydraulic valve, the motor is used for driving the gear pump, a hydraulic outlet of the gear pump is connected with a first pressure switch through a one-way valve to form a first pressure pipeline, and the overflow valve is parallelly connected to a hydraulic outlet and the hydraulic inlet of the gear pump to form a loop with the gear pump. The electromagnetic valve is connected to the hydraulic valve and sequentially connected with a second pressure switch and a second pressure switch through a proportional valve to form a second pressure pipeline. The energy accumulator is divided into three ways, one way is connected with the hydraulic valve through a manual valve, and the other ways are connected with a pressure monitoring end of the first pressure pipeline and the proportional valve of the second pressure pipeline respectively. Compared with the prior art, the hydraulic brake device has the advantages that any pressure compensation energy saving modes can be met, and the service lives of parts such as the motor and the like can be prolonged.

Hydraulic brake device

The invention discloses a synchronous control device of revolving speed of a hydraulic walking mechanism engine and discharge of a main pump, belonging to the filed of mine and engineering machinery. The synchronous control device comprises a proportional pressure reducing valve, a main pump servo valve and an accelerator control cylinder, wherein a valve block is arranged between the proportional pressure reducing valve and the main pump servo valve; a shuttle valve and two throttle plugs are embedded into the pressure reducing valve. Two ends of the shuttle valve are respectively connected between an output port A and an output port B of the proportional pressure reducing valve. The proportional pressure reducing valve controls the servo valve of a variable pump through a throttle plug hole; an output pressure signal of the proportional pressure reducing valve at the left side or the right side is output to the accelerator control cylinder through the output port of the shuttle valve to control the stroke of an oil cylinder so as to control an accelerator of the engine. The synchronous control device disclosed by the invention has the advantages that a motor car can be operated to move forwards or backwards or to change speed by operating a discharge handle of the pump only; the revolving speed of the engine is automatically adjusted to match with the power requirement of the pump while the variable of the pump is controlled, and therefore the problem that the engine is suffocated and switched off due to mismatching between the discharge of the pump and the accelerator of the engine during starting the motor car can be prevented.

Synchronous control device of revolving speed of hydraulic walking mechanism engine and discharge of main pump

Controlling a functional system of a materials handling vehicle (10) includes monitoring a current (IBATT) delivered by an energy storage system (15) for powering the functional system, wherein the energy storage system may include at least one of a battery and a fuel cell. When the current delivered by the energy storage system exceeds a first predetermined amount, performance of the functional system is reduced from a first operating level to a second operating level for at least one task of the functional system to attempt to reduce the current delivered by the energy storage system.

Method for controlling a functional system of a materials handling vehicle

The utility model discloses an independent steering system driven by a motor, which belongs to the steering technical field of heavy transportation facilities. The system comprises a hydraulic variable pump, a slewing bearing, an angle sensor, a hydraulic motor, a controller, a proportional multiway valve, an overflow valve and a hydraulic oil tank; the hydraulic variable pump is respectively connected with the hydraulic oil tank and the proportional multiway valve; the proportional multiway valve is respectively connected with the hydraulic motor and the controller; the hydraulic motor is respectively connected with the slewing bearing and the hydraulic oil tank; the angle sensor is connected with the slewing bearing; and the overflow valve is respectively connected with the hydraulic variable pump and the proportional multiway valve. The independent steering system drives the slewing bearing to steer through the hydraulic motor, thereby solving the problems of complex multi-mode steering operation and difficult arrangement of large-tonnage engineering vehicles, improving the accuracy of the steering angle of the large-tonnage engineering vehicles and reducing the complexity of the structure of the steering system.

Independent steering system driven by motor

The utility model relates to a throttle on-off control system of an engine used for a special car and a construction vehicle, which comprises a throttle control cylinder; the throttle control cylinder is a single rod cylinder of which a sucker-rod cavity is a pressure cavity, and a non-rod cavity is a non pressure cavity which is provided with a return spring; the pressure cavity of the throttle control cylinder is connected with output ends of two manual or pedal pressure regulating valves through a shuttle valve; the input ends of the manual or pedal pressure regulating valves are connected with pressure gas source The system has simple and reasonable structure, easy manufacture and arrangement, rapid response speed, high control precision and stable control performance, which can realize precise control of double cab and multi-point to the throttle and output power of the engine The system can also realize control of long distance by using pneumatic control; drivers can tread and control the manual or pedal pressure regulating valves according to working conditions of the vehicles to realize regulation of the size of the throttle of the engine through the change of the air pressure; by arranging reversing valves and pressure reducing valves on gas path, stable output power of the engine in full-load operation can be realized

Throttle two-position control system of engine

The utility model relates to a hydraulic pipeline two-way anti-explosion valve, which comprises a valve, a valve cavity and a valve core arranged in the valve core. The anti-explosion valve further comprises a pressure sensing port, wherein the pressure sensing port, a first pipe opening and a second pipe opening are arranged on two planes parallel to the valve cavity; the first and second pipe openings are communicated with two annular slots on the valve cavity; the front and back sides of the valve are vertical to two pressure releasing holes on the center of the valve cavity; and the valve core is a cylinder with an annular slot on the middle, is arranged in the valve cavity and can slide left and right in the valve cavity. When the pipeline between the two-way anti-explosion valve and a hanging oil tank is broken, the two-way anti-explosion valve is locked under the action of a differential pressure so as to close the hydraulic oil in the hydraulic system and separate the hanging oil tank which is in failure from the whole vehicle. When the pipeline between the two-way anti-explosion valve and the hanging oil tank is blasted, the two-way anti-explosion valve is locked under the action of a differential pressure so as to close the hydraulic oil in the hydraulic system and close the hanging oil tank which is in failure.

Hydraulic pipeline two-way anti-explosion valve

The utility model relates to a suspension steering system and discloses an independent-steering oil gas suspension system. The independent-steering oil gas suspension system comprises an axle, a rotary arm, a swinging arm, a swinging cylinder, a slewing bearing, a suspension oil cylinder, an energy accumulator and an oil cylinder travel transmitter, wherein the swinging cylinder is arranged on a frame and is connected with the rotary arm; the swinging cylinder is provided with a coder; an outer gear ring of the slewing bearing is connected with the frame, and an inner gear ring of the slewing bearing is connected with the rotary arm; the rotary arm is connected with the swinging arm; the swinging arm is connected with the axle; the energy accumulator is connected with a hydraulic source; the oil inlet of the suspension oil cylinder is connected with the energy accumulator; the cylinder barrel of the suspension oil cylinder is connected with the rotary arm; the piston rod of the suspension oil cylinder is connected with the swinging arm; and the oil cylinder travel transmitter is installed on the suspension oil cylinder. By adopting the swinging cylinder as the steering driving mechanism, the independent-steering oil gas suspension system provided by the utility model has the advantages of compact structure, good use effect and low cost, is convenient to assemble and disassemble, is especially suitable for vehicles with smaller space and is easy to maintain.

Independent-steering oil gas suspension system

The utility model relates to a proportional synchronous lifting system. The proportional synchronous lifting system comprises a proportional synchronous lifting valve bank, four groups of supporting oil cylinders, a controller and position sensors, wherein the proportional synchronous lifting valve bank comprises a valve block body and four groups of hydraulic control one-way valves, proportional directional valves, plate-type ball valves, pressure sensors and overflow valves; the four groups of hydraulic control one-way valves, proportional directional valves, plate-type ball valves, pressure sensors and overflow valves are arranged on the valve block body; the position sensors are connected with the controller and height sensors which are arranged at supporting points; the controller is connected with the proportional lifting valve bank; and the proportional lifting valve bank is connected with the supporting oil cylinders. Due to the adoption of the structure, closed-loop control can be realized, and the precision and the stability for synchronization of a lifting platform are improved.

Xuewei Tan

Papers

Independent steering system driven by motor

Throttle two-position control system of engine

Hydraulic pipeline two-way anti-explosion valve

Independent-steering oil gas suspension system

Proportional synchronous lifting system