Simulation detection system for super-lifting mechanism of large crane

Abstract

The utility model belongs to the field of cranes, and discloses a simulation detection system for a superlift mechanism of a large crane, which comprises a sensor unit and a detection unit, comprising a winch encoder calibration sensor, an angle encoder zero calibration sensor, a radio frequency signal detection sensor, a tensioning cylinder upper locking lock detection sensor and a superlift pressure sensor. The number of the superlift supports is two, each superlift support is provided with a sensor unit, each detection unit comprises a PLC, an action logic solenoid valve relation detection module is arranged in the PLC, and the PLC is connected with the two sets of sensor units and the display device through input and output cables. The sensor unit is used for carrying out operation test on each part of the superlift mechanism, the PLC is used for summarizing and generating a related detection report, and the related detection report is displayed on the display equipment, so that whether the operation of the two superlift supports has an error can be intuitively judged, error correction and debugging are facilitated, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of cranes, in particular to a simulation detection system for a superlifting mechanism of a large crane. Background Art

[0002] Super-lifting mechanism: The super-lifting mechanism is a "V"-shaped boom-type super-lifting support arm set between the main boom and the tip of the main boom to improve the parallel geometric relationship between the main boom and the wire cable. At the same time, the super-lifting support arm is connected to the tail of the turntable to form a double triangle stable form, which increases the stability of the entire crane boom, thereby improving the performance of the crane, expanding the scope of use of the crane, and improving the utilization rate of the crane.

[0003] At present, after the super-lifting mechanism is assembled, there is no device that can test and verify the qualification of its related functions. It is first installed on the whole machine, and then the corresponding parameters of the electrical system, hydraulic system, and control system on the super-lifting device are adjusted and calibrated. When the super-lifting device is installed on the whole crane, due to the need to adjust and calibrate the parameters of the hydraulic and electrical components, the operator needs to climb up and inspect it many times, and the height is about 7 meters. Due to the limited space above the crane boom and the need for 2-3 people to cooperate in the operation, safety accidents are prone to occur. At the same time, since it is impossible to provide power for the super-lifting device, the super-lifting winch wire rope can only be wound on the outdoor crane machine, making the super-lifting device a semi-finished product state that enters the next process, and the assembly process of assembly-testing-calibration-finished product is not realized. This leads to other problems such as product quality during the debugging process of the super-lifting mechanism. Due to the complex components of the super-lifting mechanism, it is easy to cause hydraulic, electrical, control system and other faults, which makes its maintenance cost high and the cycle long, restricting the debugging and production progress of the whole crane.

[0004] It can be seen from this that how to complete the parameter adjustment and calibration of the super-lifting mechanism after assembly without installing the whole machine is a technical problem that needs to be solved at present. Summary of the invention

[0005] In view of the above problems, the utility model provides a simulation detection system for detecting the operation of each component of the super-lifting mechanism through sensors, which can complete the parameter adjustment and calibration of the super-lifting mechanism without installing the whole machine. The specific scheme is as follows:

[0006] A large crane super-lifting mechanism simulation detection system includes a sensor unit and a detection unit, wherein the sensor unit is installed on a super-lifting bracket and includes:

[0007] The hoisting encoder calibration sensor is an encoder sensor, which is located at the central axis of the hoisting drum of the superlifting bracket and is used to detect the rotation degree of the hoisting drum;

[0008] Angle encoder zero point calibration sensor, which is an angle sensor, is located at the rotation axis connecting the superlift support and the boom, and is used to detect the deployment angle of the superlift support;

[0009] A radio frequency signal detection sensor, which is located on the side of the rotating gear at the end of the hoist drum and is used to record the number of teeth of the current gear passing through the sensor;

[0010] The locking detection sensor on the tensioning cylinder is a position detection switch, which is located on the cylinder locking ratchet and is used to detect whether the cylinder locking is stable;

[0011] The pressure sensor is located in the superlift control main valve and is used to detect the pressure of the superlift when performing luffing, tensioning, unfolding and hoisting actions;

[0012] There are two super-lifting brackets, which are symmetrical to each other to form a V-shaped bracket, and each super-lifting bracket is equipped with the sensor unit;

[0013] The detection unit comprises:

[0014] AC power supply,

[0015] A power step-down device connected to an AC power source;

[0016] A PLC controller, which is electrically connected to the power step-down device and transmits data with the two sets of sensor units through input cables;

[0017] The PLC controller is provided with an action logic solenoid valve relationship detection module, which is electrically connected to the super lift control main valve solenoid to detect the action execution of the solenoid valve;

[0018] The display device is electrically connected to the power step-down device and transmits data to the PLC controller through an output cable.

[0019] Furthermore, a wireless transmission module is provided in the detection unit, and the wireless transmission module is electrically connected to the power buck and transmits data to the PLC controller via an output cable.

[0020] Furthermore, a terminal block is provided between the PLC controller and the sensor unit.

[0021] Furthermore, a fuse box is provided in the output circuit of the power step-down device.

[0022] Furthermore, the angle encoder zero point calibration sensor performs zero point calibration when the superlift support is horizontal with the boom axis.

[0023] Furthermore, a radio frequency signal sensing element is provided on any tooth of the rotating gear, and the radio frequency signal detection sensor receives a feedback signal of the radio frequency signal sensing element.

[0024] Compared with the prior art, the advantages of the utility model are as follows:

[0025] 1. The utility model detects the operating parameters of each component of the super-lifting mechanism through sensors, and feeds back the detection results through the detection unit, so that the parameter adjustment and calibration of the super-lifting mechanism can be completed without installing the whole machine.

[0026] 2. The utility model can output the test report remotely by setting a wireless transmission module in the detection unit, without having to wait for the result on site.

[0027] 3. The utility model has the advantage of regularizing the sensor circuit and avoiding entanglement of the circuits by arranging the terminal block in the detection unit.

[0028] 4. The utility model performs zero point calibration by setting the angle encoder zero point calibration sensor when the superlift support is horizontal with the boom axis, which has the advantages of simple measurement and can avoid incorrect vibration detection when the boom is running.

[0029] 5. The utility model provides a radio frequency signal sensing element on any tooth of the rotating gear, and can determine whether an error occurs between the rotations of the two sets of winch drums by receiving a feedback signal between the radio frequency signal sensing element and the radio frequency signal detection sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a position relationship diagram between the sensor unit and the super-lifting mechanism;

[0031] Figure 2 A diagram showing the position relationship between the radio frequency signal detection sensor and the rotating gear;

[0032] Figure 3 is a structural diagram of the detection unit;

[0033] Figure 4 To detect the corresponding circuit diagram;

[0034] Reference numerals:

[0035] 1. Super lifting bracket; 2. Winch encoder calibration sensor; 3. Angle encoder zero point calibration sensor; 4. Radio frequency signal detection sensor; 5. Tension cylinder lock detection sensor; 7. Super lifting pressure sensor; 8. Plug; 9. Power step-down device; 10. PLC controller; 11. Display device; 12. Wireless transmission module; 13. Terminal block; 14. Fuse box. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments.

[0037] Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the utility model.

[0038] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances. Example

[0040] A large crane super lifting mechanism simulation detection system includes a sensor unit and a detection unit, such as Figure 1 As shown, the sensor unit is mounted on a super-lifting bracket and includes:

[0041] The hoisting encoder calibration sensor is an encoder sensor, which is located at the central axis of the hoisting drum of the superlifting bracket and is used to detect the rotation degree of the hoisting drum;

[0042] The angle encoder zero point calibration sensor is an angle sensor, which is located at the rotating shaft connecting the superlift support and the boom, and is used to detect the deployment angle of the superlift support; the angle encoder zero point calibration sensor performs zero point calibration when the superlift support and the boom axis are horizontal.

[0043] like Figure 2 As shown, a radio frequency signal detection sensor is located on the side of the rotating gear at the end of the hoisting drum, and is used to record the number of teeth of the current gear passing through the sensor. A radio frequency signal sensing element is provided on any tooth of the rotating gear, and the radio frequency signal detection sensor receives a feedback signal from the radio frequency signal sensing element;

[0044] The locking detection sensor on the tensioning cylinder is a position detection switch, which is located on the cylinder locking ratchet and is used to detect whether the cylinder locking is stable;

[0045] The pressure sensor is located in the superlift control main valve and is used to detect the pressure of the superlift when performing luffing, tensioning, unfolding and hoisting actions;

[0046] There are two super-lifting brackets, which are symmetrical to each other to form a V-shaped bracket, and each super-lifting bracket is equipped with the sensor unit;

[0047] like Figure 3 , Figure 4 As shown, the detection unit includes:

[0048] AC power supply. The detection unit is provided with a plug connected to the AC power supply.

[0049] A power step-down device is connected to an AC power source, and a fuse box is provided in an output circuit of the power step-down device;

[0050] A PLC controller, which is electrically connected to the power step-down device and transmits data with the two sets of sensor units through input cables;

[0051] The PLC controller is provided with an action logic solenoid valve relationship detection module, which is electrically connected to the super lift control main valve solenoid to detect the action execution of the solenoid valve;

[0052] A display device, which is electrically connected to the power step-down device and transmits data to the PLC controller via an output cable;

[0053] The detection unit is provided with a wireless transmission module, the wireless transmission module is electrically connected to the power supply step-down device, and transmits data with the PLC controller through an output cable;

[0054] A wiring terminal row is arranged between the PLC controller and the sensor unit. Example

[0055] The diagnostic scheme of the superlift mechanism of the utility model:

[0056] A sensor network structure is constructed using the bus. Each sensor is an intelligent node on the bus network. Each node can detect the operating status of the equipment. Some sensors output signal types mainly of voltage, current or switch signal. We can use the PLC AD conversion of this type of sensor to obtain specific data and then send the data of this type of sensor through the bus network. The relevant data of the sensor bus network and some external sensor data are received and processed by the online diagnostic system. The system gives corresponding conclusions based on the detection information and stores and displays them.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of each embodiment of the utility model.

Claims

1. A large crane super lifting mechanism simulation detection system, comprising a sensor unit and a detection unit, characterized in that: The sensor unit is mounted on a super-lifting bracket and includes: The hoisting encoder calibration sensor is an encoder sensor, which is located at the central axis of the hoisting drum of the superlifting support and is used to detect the rotation degree of the hoisting drum; Angle encoder zero point calibration sensor, which is an angle sensor, is located at the rotation axis connecting the superlift support and the boom, and is used to detect the deployment angle of the superlift support; A radio frequency signal detection sensor, which is located on the side of the rotating gear at the end of the hoist drum and is used to record the number of teeth of the current gear passing through the sensor; The locking detection sensor on the tensioning cylinder is a position detection switch, which is located on the cylinder locking ratchet and is used to detect whether the cylinder locking is stable; The pressure sensor is located in the superlift control main valve and is used to detect the pressure of the superlift when performing luffing, tensioning, unfolding and hoisting actions; There are two super-lifting brackets, which are symmetrical to each other to form a V-shaped bracket, and each super-lifting bracket is equipped with the sensor unit; The detection unit comprises: AC power supply, A power step-down device connected to an AC power source; A PLC controller, which is electrically connected to the power step-down device and transmits data with the two sets of sensor units through input cables; The PLC controller is provided with an action logic solenoid valve relationship detection module, which is electrically connected to the super lift control main valve solenoid to detect the action execution of the solenoid valve; The display device is electrically connected to the power step-down device and transmits data to the PLC controller through an output cable.

2. The large crane superlifting mechanism simulation detection system according to claim 1 is characterized in that: The detection unit is provided with a wireless transmission module, which is electrically connected to the power buck and transmits data to the PLC controller via an output cable.

3. The large crane superlifting mechanism simulation detection system according to claim 1 is characterized in that: A wiring terminal row is arranged between the PLC controller and the sensor unit.

4. The large crane superlifting mechanism simulation detection system according to claim 1 is characterized in that: A fuse box is arranged in the output circuit of the power step-down device.

5. The large crane superlifting mechanism simulation detection system according to claim 1 is characterized in that: The angle encoder zero point calibration sensor performs zero point calibration when the super lifting bracket is horizontal with the boom axis.

6. The large crane superlifting mechanism simulation detection system according to claim 1 is characterized in that: A radio frequency signal sensing element is arranged on any tooth of the rotating gear, and the radio frequency signal detection sensor receives a feedback signal of the radio frequency signal sensing element.

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