Control system for controlling lifting of cab and broadening of crawler belt of crawler crane by using CPM

Abstract

The utility model discloses a control system for controlling the lifting of a cab of a crawler crane and the broadening function of a crawler belt by utilizing a CPM. A power supply is connected with a power supply port of a PLC (Programmable Logic Controller) through a fuse; the operating handle is connected with a CAN line port of the PLC through a CAN bus. The CAN key panel is connected with a CAN line port of the PLC through a CAN bus; the display is connected with a CAN line port of the PLC through a CAN bus; an on-off output port of the PLC is connected with the CPM through a CAN (Controller Area Network) bus; the CPM is connected with the M4 hydraulic valve block, and the M4 hydraulic valve block is respectively connected with the cab lifting oil cylinder and the caterpillar band broadening oil cylinder to drive the cab lifting oil cylinder and the caterpillar band broadening oil cylinder to act. According to the utility model, the extension and retraction of the crawler widening oil cylinder and the ascending and descending functions of the cab of the crawler crane can be controlled, the complexity and limitation of a common hydraulic valve control mode are improved, and the control flow is greatly simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of crawler crane control, and relates to a control system that utilizes CPM to control the lifting and lowering of a crawler crane cab and the widening of crawler tracks. Background Art

[0002] The existing hydraulic control method has problems such as complex connection, single control method, inability to find faults and read parameters in time, and difficulty in observation and adjustment due to site restrictions during operation.

[0003] The CPM (CAN-controlled Pilot Module) is a new-generation CAN-controlled PWM module that can control the flow of the M4 hydraulic valve block via digital electrical signals. The CPM has its own status indicator, which can be used to determine whether the valve power supply and other conditions are normal. The CPM also displays communication status and fault feedback on the display screen, allowing real-time feedback to determine whether the valve is executing according to the control value. It can also quickly provide feedback on fault codes and determine the cause of the fault based on the corresponding fault code, making it very convenient for handling harsh working conditions. Currently, there is no control system that uses CPM to control the hydraulic flow of the M4 hydraulic valve block via digital electrical signals to control the cab raising and lowering and track widening functions of crawler cranes, making it difficult to meet actual work needs. Utility Model Content

[0004] The purpose of this utility model is to provide a control system that uses CPM to control the lifting and lowering of the crawler crane cab and the widening of the crawler tracks, filling the gap in such control systems to meet actual work needs and achieve simpler and more stable control.

[0005] The technical solution adopted by the utility model is: the control system includes the following modules: a CAN button panel, an operating handle, a PLC controller, a display screen, a CPM and an M4 hydraulic valve block; wherein: the power supply is connected to the power port of the PLC controller via a fuse; the operating handle is connected to the CAN line port of the PLC controller via a CAN bus; the CAN button panel is connected to the CAN line port of the PLC controller via a CAN bus; the display is connected to the CAN line port of the PLC controller via a CAN bus; the switching output port of the PLC controller is connected to the CPM via a CAN bus; the CPM is connected to the M4 hydraulic valve block, and the M4 hydraulic valve block is respectively connected to the driver's cab lifting cylinder and the track widening cylinder to drive them to operate.

[0006] When the utility model is working, the input operation signals collected by the operating handle and the CAN button panel are sent to the PLC controller through the CAN bus. The PLC controller calculates the control signal according to the collected operation signal and sends it to the CPM. The CPM judges the received signal to control the hydraulic flow of the M4 hydraulic valve block, drives the cab lifting cylinder and the track widening cylinder to move, thereby controlling the cab pitching and track widening functions of the crawler crane.

[0007] This utility model can control the extension and retraction of the crawler crane's track extension cylinder and the raising and lowering of the driver's cab, improving the complexity and limitations of conventional hydraulic valve control methods and greatly simplifying the control process. Connected via the CAN bus, it is safe and reliable and can be applied to other similar control functions.

[0008] It has the following beneficial effects:

[0009] 1. The entire control process uses CANBUS connection mode, which has simple wiring, stable effect, easy expansion, and can prepare for other functions.

[0010] 2. The entire process fully complies with the CANOPEN communication method, and the communication status and data can be displayed in real time on the display screen, facilitating timely observation, analysis, setting and adjustment of parameters.

[0011] 3. CPM can self-diagnose to ensure that all functions are started normally.

[0012] 4. CPM itself has a status indicator light, which can be used to determine whether the valve body power supply and other conditions are normal, making it easier to find faults more intuitively.

[0013] 5. CAN bus communication can display the working status and fault feedback in detail. It can judge whether the valve body is executing according to the control value by feeding back the feedback value of CPM to PLC controller in real time. With fault feedback, the fault code can be quickly fed back on the display screen, and the cause of the fault can be judged by the corresponding fault code, which is very convenient.

[0014] 6. The PLC controller calculates the control signal based on the collected operation signal and sends it to the CPM with its own direction judgment. It distinguishes the action direction by the control value to avoid errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural block diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the self-diagnosis process of the CPM of the present utility model;

[0017] Figure 3 This is a flow chart of the control method of the utility model;

[0018] Figure 4 This is the circuit schematic diagram of the utility model;

[0019] Figure 5a 、 Figure 5b This is a schematic diagram of the appearance of the CPM of the utility model;

[0020] Figure 6 Wiring diagram of the CPM of the utility model;

[0021] Figure 7a 、 Figure 7b This is a schematic diagram of the interface of the display of the present invention. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, the utility model includes the following modules:

[0023] The CAN key panel located in the crawler crane driver's cab is used to collect input operation signals.

[0024] The operating handle located in the crawler crane driver's cab is used to collect input operation signals.

[0025] The PLC controller located in the electric control cabinet is used to calculate the control signal based on the collected operation signal.

[0026] Display screen, used to display communication status and working status, etc.

[0027] The CPM, mounted on the crawler crane platform, compares the digital input signal with the signal from the integrated position sensor and controls the hydraulic flow of the M4 hydraulic valve block via a digital electrical signal.

[0028] Among them: the power supply is connected to the power port of the PLC controller via a fuse; the operating handle is connected to the CAN line port of the PLC controller via a CAN bus; the CAN key panel is connected to the CAN line port of the PLC controller via a CAN bus; the display is connected to the CAN line port of the PLC controller via a CAN bus; the switching output port of the PLC controller is connected to the CPM via a CAN bus; the CPM is connected to the M4 hydraulic valve block, and the M4 hydraulic valve block is respectively connected to the cab lifting cylinder and the track widening cylinder to drive them to operate.

[0029] like Figure 3As shown, the specific working process of the present invention is as follows: after the power unit (diesel engine or motor) is started, the mode is selected by the CAN key panel, and the collected input operation signal is sent to the PLC controller via the CAN bus. The operating handle is then used to input the signal, which is sent to the PLC controller via the CAN bus. The PLC controller calculates and processes the received signal and sends it to the CPM via the CAN bus. The electronic components of the CPM's pilot module compare the digital (CAN bus) input signal with the signal of the integrated position sensor, and control the flow of the M4 hydraulic valve block through the digital electrical signal, thereby improving the control accuracy. The M4 hydraulic valve block is respectively connected to the cab lifting cylinder and the track widening cylinder to drive them to operate.

[0030] like Figure 4 As shown, the circuit connection of the present invention is as follows: the power supply is connected to the power port of the CAN key panel via fuses FU14, FU24, FU18, and FU25 respectively; the CAN key panel is connected to the CAN line port of the PLC controller via the CAN bus; the operating handle 1 and the operating handle 2 are connected to the CAN line port of the PLC controller via the CAN bus; the display is connected to the CAN line port of the PLC controller via the CAN bus; the CPM is connected to the CAN line port of the PLC controller via the CAN bus; and a 120Ω resistor is installed between the CAN buses.

Claims

1. A control system for controlling the cab raising and lowering and crawler track widening functions of a crawler crane using CPM, characterized by: The control system includes the following modules: CAN button panel, operating handle, PLC controller, display screen, CPM and M4 hydraulic valve block; among them: the power supply is connected to the power port of the PLC controller via a fuse; the operating handle is connected to the CAN line port of the PLC controller via a CAN bus; the CAN button panel is connected to the CAN line port of the PLC controller via a CAN bus; the display screen is connected to the CAN line port of the PLC controller via a CAN bus; the switching output port of the PLC controller is connected to the CPM via a CAN bus; the CPM is connected to the M4 hydraulic valve block, and the M4 hydraulic valve block is respectively connected to the cab lifting cylinder and the track widening cylinder to drive them to operate.

2. The control system for controlling the cab raising and lowering and crawler track widening functions of a crawler crane using CPM according to claim 1 is characterized by: There are two operating handles, namely operating handle I (1) and operating handle II (2).

3. The control system for controlling the cab raising and lowering and crawler track widening functions of a crawler crane using CPM according to claim 1 is characterized by: There are four fuses, namely fuses FU14, FU24, FU18, and FU25.

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