Power distribution and control integrated system for crane

Abstract

The invention discloses a power distribution and control integrated system for a crane, which comprises a power supply and a whole vehicle electric device, components contained in the whole vehicle electric device are all electrically connected with the power supply, and the connecting end of the power supply is electrically connected with an upper vehicle power distribution and controller integrated circuit and a lower vehicle power distribution and controller integrated circuit. By designing an independent circuit integrating upper and lower vehicle power distribution and the controller, an electric appliance load can be directly driven through a control logic or a communication network instruction, direct control of the controller is canceled, intelligent power distribution and management are realized, the port utilization rate of the controller and the use number of the controller are optimized, and the design and production cost is reduced; a power distribution mode that a fuse relay box and a controller are combined by a current crane is replaced, fuses do not need to be replaced, automatic recovery is achieved after faults disappear, meanwhile, use of various relays and a large number of wire harnesses is avoided, and system design and application are simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery electrical system and power management, in particular to a power distribution and control integrated system for cranes. Background Art

[0002] At present, the electrical system of cranes widely uses traditional fuse relay boxes for power distribution. The fuses are blown to prevent the circuit from failing or the abnormal current change during overload, which may cause the crane line to heat up too high and burn out the line or equipment, thus ensuring the safe operation of the crane. In this case, the fuses need to be inspected, repaired or replaced, which increases the maintenance cost. Figure 2 As shown, its power management system includes a power supply, a controller and a fuse relay box. The power input end of the fuse relay box is connected to the power supply, at least one output power end is connected to the input power end of the controller, and the other power output ends are respectively connected to the power input end of the load of the crane vehicle electrical system. There are two channels inside the fuse relay box, namely, fuse, relay and fuse combination. The input power end of the controllable loads such as electrical system lights, wipers, rearview mirrors, horns, etc. is connected to the relay and the fuse channel, and the input power end of other loads (for example: air heater power supply, ceiling light power supply, seat power supply, etc.) is connected to the fuse channel. The output control end of the controller is connected to the input control end of the fuse relay box, corresponding to different channels of the fuse relay box. The controller collects input signals and controls the relay to drive the corresponding electrical load to work according to the control logic. When the crane electrical system encounters a fault or abnormal situation, such as overcurrent, short circuit, etc., the fuse blows and the relay disconnects the contacts to cut off the power supply line, thereby protecting the crane power supply circuit. The crane is equipped with power management modules of controllers and fuse relay boxes of different specifications. The onboard controller and the offboard controller are connected through the CAN network. While driving the corresponding electrical equipment of the onboard and offboard, the working status of the connected electrical equipment can be obtained, so as to realize the power supply switching of the crane onboard and offboard. During the operation of the onboard, the offboard controller obtains the working status of the onboard electrical equipment through the CAN bus, and controls the relay disconnection contact to cut off the power supply of the electrical equipment that is not necessary for the offboard (such as air conditioning, offboard central control display, etc.); during the offboard operation, the onboard controller obtains the working status of the offboard electrical equipment through the CAN bus, and controls the relay disconnection contact to cut off the power supply of the onboard electrical equipment (such as handles, onboard display, boom lighting, etc.) according to the logic control.

[0003] The crane fuse relay box of the above scheme is connected to the power supply of the whole vehicle, and supplies power to each power branch through the fuse. In addition, after the controller is powered normally, the relay is controlled to drive the electrical load according to the control logic. Due to the poor characteristics of the fuse, the fault protection time is long and the wiring harness design margin is large. The relay needs to be controlled by the controller, and its mechanical contacts are also easily burned out due to faults. The fuse relay box has no working status monitoring function, and the degree of digitization and intelligence is low, which limits the application of new crane technologies. In addition, this scheme also has the following disadvantages: 1) The fuse relay box needs to be logically controlled by the controller to drive the crane electrical load, which increases the number of controller ports. The controller ports cannot be effectively used and the supporting cost is high; 2) The fuse relay box is controlled by relays, fuses and signal lines. The logic cannot be changed. The fixed fuse specifications determine that the protection current cannot be adjusted, the design flexibility is poor, and the power distribution efficiency is low; 3) The poor characteristics of the fuse require a large wiring harness design margin when matching, and the fuse cannot self-recover. After it is blown or burned, it needs to be checked and replaced, which has high maintenance costs; 4) Fuses and relays are passive components that cannot monitor working status and diagnose faults, and have a low level of intelligence.

[0004] Therefore, it is necessary to research and develop an integrated power distribution and control system for cranes. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a power distribution and control integrated system for cranes in view of the deficiencies of the above-mentioned prior art, so as to solve the technical problems raised in the background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A power distribution and control integrated system for a crane, comprising a power supply and a vehicle electrical equipment, wherein the components of the vehicle electrical equipment are all electrically connected to the power supply, wherein the connection end of the power supply is electrically connected to an onboard power distribution and controller integrated circuit and an offboard power distribution and controller integrated circuit, wherein the onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit are connected in parallel, and the output ports of the onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit are respectively provided with an onboard display and an offboard central control display; The onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit both include an input / output module, a current detection module, a control module and a communication module, wherein: The input / output module is used to receive input current from the power supply and transmit the current to multiple output ports for installing electrical equipment of the whole vehicle; The control module is used to drive the crane vehicle electrical system composed of the vehicle electrical equipment; The current detection module is used to detect the current of each output port, and cooperates with the control module to realize the circuit on-off protection between the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit and the load; The communication module is used for mutual communication between the onboard power distribution and controller integrated circuit, the offboard power distribution and controller integrated circuit and the onboard display or the offboard central control display.

[0007] Preferably, the output port is provided with a relay, and the connection end of the control module is provided with a timer. The control module receives and processes the signal of the current detection module. When the detected current is greater than the set protection current value, the load input power supply end circuit is cut off after the set protection time.

[0008] Preferably, the input port of the input / output module is connected to the output port of the power supply, and the electrical equipment of the entire vehicle is installed in a one-to-one correspondence in the multiple output ports of the input / output module and is electrically connected.

[0009] Preferably, the electrical equipment of the whole vehicle includes on-board electrical equipment and off-board electrical equipment. The on-board electrical equipment includes boom lighting, handles, displays, external arm sensors, winches, pumps, pressure sensors, arm controllers and force limiters. The off-board electrical equipment includes start keys, ignition switches, position lights, horns, wipers, cameras, vehicle refrigerators, outrigger throttles, gearboxes, ECUs, daily lights, instrument panels, off-board central control displays, cab air conditioners and steering controllers.

[0010] Preferably, the electrical equipment for getting off the vehicle is divided into a power supply set for maintenance and a power supply set that can be cut off for onboard operation. When the crane is onboard, the power supply of the equipment that can be cut off for onboard operation is automatically cut off through the logic control of the control module. When the crane is getting off the vehicle, the input power supply terminals of all electrical equipment on the vehicle are automatically cut off through the logic control of the control module, wherein: The power supply set includes the start key, ignition switch, clearance lights, horn, wipers, camera, car refrigerator, outrigger throttle, transmission and ECU; The power supply can be cut off during on-board operation, including daily lights, instrument panel, central control display, cab air conditioning and steering controller; The power supply set for getting off the vehicle and cutting off the power supply includes the boom lighting, handle, on-vehicle display, arm external sensor, winch, pump, pressure sensor, arm controller and force limiter.

[0011] Preferably, the on-board display receives and displays the load conditions of each output port and the on-off status of the circuit from the on-board power distribution and controller integrated circuit.

[0012] Preferably, the alighting central control display receives and displays the load conditions of each output port and the on-off status of the circuit from the alighting power distribution and controller integrated circuit.

[0013] The power distribution and control integrated system for cranes also includes a control terminal. The control modules on the onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit are connected to the control terminal through a CAN bus or communication equipment, and can remotely and actively manage power.

[0014] The present invention has the following beneficial effects: By designing independent circuits integrating the power distribution and controllers for getting on and off the vehicle, the circuits are applied to the electrical systems of construction machinery, especially cranes, to distribute and manage power. The electrical loads can be driven directly through control logic or communication network instructions, and direct control by the controller is eliminated. Intelligent power distribution and management are achieved, the controller port utilization rate and the number of controllers used are optimized, and the design and production costs are reduced. The independent circuits integrated with the controller for the power distribution of the loading and unloading cranes replace the power distribution mode of the current cranes that uses a combination of a fuse relay box and a controller. There is no need to replace the fuse, and the crane automatically recovers after the fault disappears. At the same time, it avoids the use of multiple relays and a large number of wiring harnesses, simplifies system design and application, and reduces maintenance costs. It solves the limitations of the fuse relay box, which has fixed and discontinuous fuse specifications, resulting in limited drive load, low electrical design efficiency, and high design change costs. It does not need to use multiple relays, and achieves a high degree of integration and simple wiring. It has active power management function, which can realize power supply switching according to the two working states of crane loading and unloading, cut off the power supply of unnecessary electrical equipment, reduce power consumption and ensure operation safety, and avoid invalid power supply while ensuring safe operation; It realizes the networking function of the vehicle's power distribution data, and can remotely set working parameters while performing fault diagnosis. It can also monitor the crane's driving or working status in real time through the cloud remote mode in conjunction with the on-board display or the off-board central control display, thereby improving the level of intelligence and solving the current problem that the crane's insurance relay equipment failure cannot be monitored and diagnosed. It can realize data interconnection and real-time monitoring, and fully meet the functional safety characteristics of the crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The electrical system network architecture diagram of the integrated power distribution and control system for cranes provided by the present invention; Figure 2 This is a power management system architecture diagram in the prior art solution; DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0017] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0018] like Figure 1 As shown, the power distribution and control integrated system for cranes includes a power supply and a vehicle electrical equipment, the components included in the vehicle electrical equipment are all electrically connected to the power supply, the connection end of the power supply is electrically connected to the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit, the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit are connected in parallel, and the output ports of the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit are respectively provided with an on-board display and an off-board central control display; The onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit both include an input / output module, a current detection module, a control module and a communication module, wherein: The input / output module is used to receive input current from the power supply and transmit the current to multiple output ports for installing electrical equipment of the whole vehicle; The control module realizes port control logic, power output and fault protection through pre-setting, remote networking and other methods, and is used to drive the operation of the crane vehicle electrical system composed of the vehicle electrical equipment; The current detection module is connected in parallel with the input power supply end of each load through a hardware detection circuit to detect the current of each output port, and cooperates with the control module to realize the circuit on-off protection between the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit and the load; The communication module is used for mutual communication between the onboard power distribution and controller integrated circuit, the offboard power distribution and controller integrated circuit and the onboard display or the offboard central control display.

[0019] Specifically, the output port is provided with a relay, and the connection end of the control module is provided with a timer. The control module receives and processes the signal of the current detection module. When the detection current is greater than the set protection current value, the load input power supply end circuit is cut off after the set protection time. The protection current and protection time can be set according to the characteristics of the connected load and the application scenario. The design is more flexible and the power distribution efficiency is improved; the purpose of protecting the crane circuit is achieved, and it automatically recovers after the fault is eliminated.

[0020] Specifically, the input port of the input / output module is connected to the output port of the power supply, and the electrical equipment of the entire vehicle is installed in a one-to-one correspondence in multiple output ports of the input / output module and is electrically connected.

[0021] Specifically, the electrical equipment of the whole vehicle includes on-board electrical equipment and off-board electrical equipment. The on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit are respectively installed in the crane on-board power distribution cabinet and the off-board cab, and are respectively connected to the on-board electrical equipment and the off-board electrical equipment, and obtain the working status information of the connected electrical equipment. The on-board electrical equipment includes boom lighting, handles, on-board displays, external arm sensors, winches, pumps, pressure sensors, arm controllers and force limiters. The off-board electrical equipment includes starting keys, ignition switches, position lights, horns, wipers, cameras, on-board refrigerators, outrigger throttles, gearboxes, ECUs, daily lights, instrument panels, off-board central control displays, cab air conditioners and steering controllers.

[0022] Specifically, the electrical equipment for getting off the vehicle is divided into a power supply set for maintaining and a power supply set for getting on the vehicle that can be cut off. When the crane is getting on the vehicle, the logic control of the control module is used to automatically cut off the power supply of the equipment for the power supply set that can be cut off for the getting on the vehicle, so as to achieve partial power off of the electrical equipment for getting off the vehicle. When the vehicle is getting off and driving, the logic control of the control module is used to automatically cut off the input power supply of all the electrical equipment for getting on the vehicle, so as to achieve power off of the vehicle, wherein: The power supply set includes the start key, ignition switch, clearance lights, horn, wipers, camera, car refrigerator, outrigger throttle, transmission and ECU; The power supply can be cut off during on-board operation, including daily lights, instrument panel, central control display, cab air conditioning and steering controller; The power supply set for getting off the vehicle and cutting off the power supply includes the boom lighting, handle, on-vehicle display, arm external sensor, winch, pump, pressure sensor, arm controller and force limiter.

[0023] Specifically, the on-board display receives and displays the load conditions of each output port and the on-off status of the circuit from the on-board power distribution and controller integrated circuit; the off-board central control display receives and displays the load conditions of each output port and the on-off status of the circuit from the off-board power distribution and controller integrated circuit.

[0024] The power distribution and control integrated system provided in this embodiment can be applied to a variety of engineering machinery products, not limited to wheeled cranes, but can also be applied to crawler cranes, aerial work vehicles, concrete pump trucks and other engineering machinery equipment.

[0025] The power distribution and control integrated system for cranes also includes a control terminal. The control modules on the onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit are connected to the control terminal through the CAN bus or communication equipment. When wireless communication is adopted, the communication protocol includes but is not limited to: CAN, LIN, Ethernet and radio. It can remotely and actively manage the power supply, support network control or input signal logic control, cover various electrical equipment on and off the crane, and use the CAN bus or crane gateway / communication equipment to realize the networking function of the vehicle power distribution data. The working parameters of the power distribution and output ports are set remotely in advance or later, such as output current, protection current and protection time. Real-time monitoring of the crane status is achieved through remote start / shutdown control and working status query, including real-time monitoring of the voltage and current of all electrical equipment in the vehicle (through the background or cloud), and real-time monitoring of the working status, including whether it is working, whether overcurrent, short circuit and open circuit occur, etc., to realize digital and intelligent management of crane power distribution.

[0026] Working principle: This system is applied to the electrical system of the crane. According to the two working states of the crane getting on and getting off, the power supply switching is realized, the power supply of unnecessary electrical equipment is cut off, the power consumption is reduced and the operation safety is ensured. Specifically, during the loading operation, the communication end of the power distribution and controller integrated circuit of the unloading obtains the working state information of the electrical equipment sent by the power distribution and controller integrated circuit of the loading through the CAN network. After the loading operation is determined, the circuit between the input power end of the unnecessary electrical equipment of the unloading and the output power end of the power distribution and controller integrated circuit of the unloading is cut off through logical control, such as the input power end of the steering controller, the input power end of the air conditioner in the cab, the input power end of the central control display (multimedia) of the unloading, the input power end of the instrument panel (twin-engine crane) and the input power end of the daily lighting, etc., to realize the power off of some equipment of the unloading; during the unloading driving process, the communication end of the power distribution and controller integrated circuit of the loading obtains the working state information of the electrical equipment sent by the power distribution and controller integrated circuit of the unloading through the CAN network. After the unloading driving state is determined, the output power end and the input power end of all electrical equipment connected to the power distribution and controller integrated circuit of the loading are cut off through logical control to realize the power off of the loading.

[0027] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A power distribution and control integrated system for a crane, including a power supply and vehicle electrical equipment, wherein all components of the vehicle electrical equipment are electrically connected to the power supply, and wherein: The connection end of the power supply is electrically connected to the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit, the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit are connected in parallel, and the output ports of the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit are respectively provided with an on-board display and an off-board central control display; The onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit both include an input / output module, a current detection module, a control module and a communication module, wherein: The input / output module is used to receive input current from the power supply and transmit the current to multiple output ports for installing electrical equipment of the whole vehicle; The control module is used to drive the crane vehicle electrical system composed of the vehicle electrical equipment; The current detection module is used to detect the current of each output port, and cooperates with the control module to realize the circuit on-off protection between the on-board power distribution and controller integrated circuit and the off-board power distribution and controller integrated circuit and the load; The communication module is used for mutual communication between the onboard power distribution and controller integrated circuit, the offboard power distribution and controller integrated circuit and the onboard display or the offboard central control display.

2. The power distribution and control integrated system for crane according to claim 1, characterized in that: The output port is provided with a relay, and the connection end of the control module is provided with a timer. The control module receives and processes the signal of the current detection module. When the detected current is greater than the set protection current value, the load input power supply end circuit is cut off after the set protection time.

3. The integrated power distribution and control system for crane according to claim 1, characterized in that: The input port of the input / output module is connected to the output port of the power supply, and the electrical equipment of the whole vehicle is installed in a one-to-one correspondence in the multiple output ports of the input / output module and is electrically connected.

4. The power distribution and control integrated system for crane according to claim 1, characterized in that: The electrical equipment of the whole vehicle includes on-board electrical equipment and off-board electrical equipment. The on-board electrical equipment includes boom lighting, handles, on-board display, external arm sensors, winches, pumps, pressure sensors, arm controllers and force limiters. The off-board electrical equipment includes start key, ignition switch, position lights, horns, wipers, cameras, car refrigerators, outrigger throttles, gearboxes, ECUs, daily lights, instrument panels, off-board central control displays, cab air conditioners and steering controllers.

5. The power distribution and control integrated system for crane according to claim 4, characterized in that: The electrical equipment for getting off the vehicle is divided into a power supply set for maintenance and a power supply set that can be cut off for getting on the vehicle. When the crane is getting on the vehicle, the power supply of the equipment that can be cut off for getting on the vehicle is automatically cut off through the logic control of the control module. When the crane is getting off the vehicle, the input power supply of all the electrical equipment on the vehicle is automatically cut off through the logic control of the control module, wherein: The power supply set includes the start key, ignition switch, clearance lights, horn, wipers, camera, car refrigerator, outrigger throttle, transmission and ECU; The power supply can be cut off during on-board operation, including daily lights, instrument panel, central control display, cab air conditioning and steering controller; The power supply set for getting off the vehicle and cutting off the power supply includes the boom lighting, handle, on-vehicle display, arm external sensor, winch, pump, pressure sensor, arm controller and force limiter.

6. The power distribution and control integrated system for crane according to claim 1, characterized in that: The on-board display receives and displays the load conditions of each output port and the on-off status of the circuit from the on-board power distribution and controller integrated circuit.

7. The integrated power distribution and control system for crane according to claim 1, characterized in that: The central control display for getting off the vehicle receives and displays the load conditions of each output port and the on-off status of the circuit from the off-vehicle power distribution and controller integrated circuit.

8. The power distribution and control integrated system for crane according to claim 1, characterized in that: It also includes a control terminal. The control modules on the onboard power distribution and controller integrated circuit and the offboard power distribution and controller integrated circuit are connected to the control terminal through a CAN bus or a communication device, and can remotely and actively manage power.

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