A crane wind protection system

Abstract

The invention discloses a crane windproof system, comprising a windproof control unit and a windproof device, wherein the windproof control unit comprises a main control unit, a walking sampling unit and a displacement sampling unit, wherein the displacement sampling unit is used to detect the position state of the crane in real time, calculate the displacement distance and speed, and transmit them to the main control unit in time; the walking sampling unit is used to detect whether the crane is in a walking state, and transmit a state signal to the main control unit in real time; the main control unit is used to control the windproof device to perform windproof operation on the crane according to the monitoring data of the walking sampling unit and the displacement sampling unit. The invention has the advantages of simple and compact structure, easy operation, and greatly improved safety.

Description

Technical Field

[0001] The invention mainly relates to the technical field of cranes, in particular to a wind protection system for cranes. Background Art

[0002] Cranes (such as portal cranes) are cranes that frequently start, brake, and have complex movements for lifting, loading, and unloading. They are currently widely used in my country's ports. When working, the frequent starting, acceleration, movement, deceleration, braking, and stopping of various mechanisms such as lifting, luffing, and rotation will cause strong vibration and impact, and produce attenuated vibrations that last for a certain period of time. The dynamic load stress generated causes the wheels of the trolley travel mechanism to move back and forth on the track.

[0003] In order to ensure the windproof safety requirements of the crane during operation, a windproof device is usually installed on the traveling mechanism. The windproof device generally adopts a braking mechanism. The windproof device is generally started manually, and once started, it can only be closed manually. Alternatively, a single control method is adopted, that is, either normally closed or normally open, and it is impossible to achieve real-time adjustment, or adjust according to actual needs. In the prior art, the windproof device usually adopts the method of preventing the crane from moving to meet the windproof safety requirements during the crane loading and unloading operation. The following problems exist when using this method:

[0004] 1. The crane is prevented from moving by the windproof device, resulting in the inability to release the dynamic load stress.

[0005] 2. It is easy to cause fatigue damage to the crane's steel structure and reduce the service life of the crane.

[0006] 3. Cranes (such as gantry cranes) shake frequently during operation, making it difficult to position the spreader, causing the driver to become fatigued and affecting operating efficiency.

[0007] 4. It causes rapid wear of the brake pads, leading to safety hazards such as failure of the brake system.

[0008] If the crane is operated with its wind protection device open during loading and unloading operations, it may be easily blown away by sudden gusts of wind, causing dangers of collision, capsizing and falling into the sea, which also poses a safety hazard. Summary of the invention

[0009] The technical problem to be solved by the present invention is: in view of the technical problems existing in the prior art, the present invention provides a crane wind protection system with a simple and compact structure, easy operation and greatly improved safety.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0011] A crane windproof system comprises a windproof device and a windproof control unit, wherein the windproof control unit comprises a main control unit, a travel sampling unit and a displacement sampling unit, wherein the displacement sampling unit is used to detect the position state of the crane in real time, calculate the displacement distance and speed, and transmit the same to the main control unit in time; the travel sampling unit is used to detect whether the crane is in a travel state, and transmit a state signal to the main control unit in real time; the main control unit is used to control the windproof device to perform windproof operations on the crane according to the monitoring data of the travel sampling unit and the displacement sampling unit.

[0012] As a further improvement of the present invention: the displacement sampling unit is directly connected to the wheel axle of the crane.

[0013] As a further improvement of the present invention: the displacement sampling unit includes a support, a sampling component, an adjusting component and a transmission wheel, the transmission wheel is connected to the trolley through the support and an adjusting component is arranged between the transmission wheel and the trolley; the sampling component is connected to the axle of the transmission wheel.

[0014] As a further improvement of the present invention: the sampling component adopts an encoder structure.

[0015] As a further improvement of the present invention, it also includes a wind speed sampling unit, which is installed on the crane and connected to the main control unit to detect the wind speed and wind direction at the work site in real time and transmit relevant signals to the main control unit.

[0016] As a further improvement of the present invention: it also includes a human-computer interaction unit, which is connected to the main control unit and is used to display the system status in real time and set system parameters.

[0017] As a further improvement of the present invention: it also includes a data storage unit, which is used to store system status, wind speed, displacement parameters and status values.

[0018] As a further improvement of the present invention: the windproof device adopts one or more of braking wheels, clamping wheels, clamping rails, supporting rails, wedging wheels and the like to perform windproof operations on the crane.

[0019] As a further improvement of the present invention: it also includes a communication unit, which is one or more commonly used industrial communication methods such as PROFIBUS, PROFINET, CAN, Internet of Things terminal, etc., and is used to communicate with one or more PLCs, industrial computers or remote monitoring systems.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] 1. The crane windproof system of the present invention has a simple and compact structure, is easy to operate, and can be monitored and adjusted in real time, thereby greatly improving safety. During the crane loading and unloading operation, the windproof device can be loosened to allow the crane to move back and forth freely, releasing the dynamic load stress generated during the loading and unloading operation, reducing the fatigue of the crane structure and improving the driver's working environment. At the same time, it can automatically detect and intelligently distinguish when it is rolled by sudden gusts of wind, and automatically control the windproof device to perform windproof operations on the crane, effectively ensuring the safety of the crane. This control method based on working conditions and real-time conditions can improve the reliability of the crane's operation in real time.

[0022] 2. A crane windproof system of the present invention can automatically determine whether the crane is in a normal walking state or a parking state through a walking sampling unit and a displacement sampling unit to prevent malfunctions, and can automatically identify the displacement distance of the crane and calculate the displacement speed at the same time. The present invention can realize fully intelligent real-time control. The present invention can automatically detect the displacement size caused by the reciprocating movement of the whole machine due to the release of dynamic load stress during the rotation, amplitude change and lifting operations of the crane, automatically set the detection threshold, intelligently adapt to different types of cranes, and eliminate malfunctions caused by the reciprocating movement of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structural composition of the present invention.

[0024] Figure 2 It is a schematic diagram of the structural principle of a displacement sampling unit in a specific application example of the present invention.

[0025] Figure 3 It is a schematic diagram of the structural principle of a displacement sampling unit in another specific application example of the present invention.

[0026] Figure 4 It is a schematic diagram of the workflow of the present invention in a specific application example.

[0027] Figure 5 It is a schematic diagram of the workflow of performing zero position calibration in a specific application example of the present invention.

[0028] Legend:

[0029] 1. Windproof device; 2. Main control unit; 3. Wind speed sampling unit; 4. Walking sampling unit; 5. Displacement sampling unit; 6. Human-computer interaction unit; 7. Data storage unit; 8. Communication unit; 100. Trolley; 200. Wheel; 300. Wheel axle; 501. Support; 502. Sampling component; 503. Adjustment component; 504. Transmission wheel. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1 As shown, a crane windproof system of the present invention comprises a windproof device 1 and a windproof control unit, wherein the windproof device 1 is used to brake the wheel 200 to prevent the crane (such as a portal crane) from being displaced. The windproof control unit comprises a main control unit 2, a walking sampling unit 4 and a displacement sampling unit 5. The displacement sampling unit 5 is used to detect the position state of the crane in real time, calculate the displacement distance and speed, and transmit them to the main control unit 2 in time. The walking sampling unit 4 is used to detect whether the crane is in a walking state, and transmit a state signal to the main control unit 2 in real time. The main control unit 2 is used to control the windproof device 1 to brake the wheel 200 according to the monitoring data of the walking sampling unit 4 and the displacement sampling unit 5. The control unit also comprises a wind speed sampling unit 3, wherein the wind speed sampling unit 3 is used to detect the wind speed and wind direction at the work site in real time, and transmit the relevant signal to the main control unit 2. The key of the present invention is that it is possible to monitor the operation and wind speed of the whole vehicle in real time, and to control the working state of the windproof device 1 in combination with the wind speed and the operation, and finally realize intelligent real-time control. Therefore, the innovation key of the present invention lies in the combination of the above-mentioned components and their mutual support in function.

[0032] It should be noted that the wind speed sampling unit 3 is only used to detect the wind speed and wind direction at the work site in real time. In practical applications, it only needs to meet the actual needs of wind speed and wind direction detection. No matter what form of wind speed sampling unit 3 is used, it is within the protection scope of the present invention.

[0033] In a specific application example, the wind speed sampling unit 3 can be installed at a crane boom, a beam, a machine room roof, etc. according to actual needs. From the function of the wind speed sampling unit 3, its installation position can be selected according to actual installation needs and measurement accuracy.

[0034] In specific application examples, it is also necessary to decide whether to configure the wind speed sampling unit 3 based on actual needs such as the geographical location of the crane, environmental factors (such as wind force levels in previous years), and wind resistance requirements. It should be determined based on actual needs.

[0035] For specific application examples, see Figure 2 In a specific application scenario, a wheel 200 and a wheel axle 300 are installed on the trolley 100, and the displacement sampling unit 5 is directly connected to the wheel axle 300. The displacement sampling unit 5 can adopt an encoder structure according to actual needs.

[0036] For specific application examples, see Figure 3In another specific application scenario, a wheel 200 and a wheel axle 300 are installed on the trolley 100, and the displacement sampling unit 5 includes a support 501, a sampling component 502, an adjustment component 503 and a transmission wheel 504. The transmission wheel 504 is connected to the trolley 100 through the support 501 and an adjustment component 503 is arranged between the trolley 100. The adjustment component 503 can adopt a spring adaptive structure; the sampling component 502 is connected to the axle of the transmission wheel 504. The sampling component 502 can adopt an encoder structure according to actual needs.

[0037] In a specific application example, the present invention further includes a human-computer interaction unit 6, which is connected to the main control unit 2 and is used to display the system status in real time and to set system-related parameters.

[0038] In a specific application example, the present invention further includes a data storage unit 7, and the data storage unit 7 is used to store relevant parameters and state values ​​such as system state, wind speed, displacement, etc.

[0039] In a specific application example, the present invention further includes a communication unit 8, which can select common industrial communication modules such as PROFIBUS, PROFINET, CAN, Internet of Things terminals, etc. alone or in combination, and realize separate or combined communication with PLC, industrial computer or remote monitoring system through the corresponding communication module.

[0040] See also Figure 4 , the working principle of the present invention is:

[0041] After the system is powered on, the main control unit 2 reads the relevant parameters and enters the working state;

[0042] The main control unit 2 determines in real time whether the crane is in a parking state or a moving state according to the data sampled by the displacement sampling unit 5;

[0043] When the crane is in the moving state, no relevant detection is performed;

[0044] When the crane is in the parking state, the main control unit 2 performs displacement detection, calculates the crane displacement in real time, and compares the calculated displacement with the stored threshold value;

[0045] When the pressure is less than the threshold, the wind protection device 1 is not activated and the crane is not protected;

[0046] Once the displacement is greater than the threshold, it indicates that the crane is in an abnormal state, and the main control unit 2 immediately issues a command to control the wind protection device 1 to brake the wheel 200 to prevent accidents.

[0047] As can be seen from the above, the present invention can automatically determine whether the crane is in a normal walking state or a parking state, prevent misoperation, and can automatically identify the displacement distance of the crane, and simultaneously calculate the displacement speed. The present invention can automatically detect the displacement size caused by the reciprocating movement of the whole machine when the torque is released during the rotation and luffing operation of the crane, automatically set the detection threshold, intelligently adapt to different types of cranes, and eliminate misoperation caused by the reciprocating movement of the whole machine.

[0048] The present invention automatically detects wind speed and wind direction. For example, when the wind speed exceeds level 7, an alarm can be sent to the crane. When the wind speed exceeds level 11, the wind protection device 1 is controlled to automatically brake the wheel 200 to prevent accidents.

[0049] The present invention can distinguish and detect the displacement of the crane in real time. Once the abnormal displacement exceeds the detection threshold, the wind protection device 1 is automatically controlled to automatically brake the wheel 200 to prevent accidents.

[0050] Furthermore, the present invention is also provided with a zero position calibration process, wherein the zero position calibration is required to be performed after each crane travel, that is, the crane automatically detects and sets the parking zero position after each travel. Its working principle is: after the travel sampling unit 4 samples that the crane is in the stop command state, the main control unit 2 enters the zero position calibration state; the main control unit 2 determines whether the crane is in the inertial displacement state, and if there is no displacement, it will be judged again after a delay, and if there is still no displacement, the current position is calibrated as zero position. If there is displacement, the crane reverse judgment is performed, and once there is a reverse signal, the main control unit 2 immediately performs zero position calibration.

[0051] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A crane wind protection system, It is characterized in that The system comprises a windproof device (1) and a windproof control unit, wherein the windproof control unit comprises a main control unit (2), a walking sampling unit (4) and a displacement sampling unit (5), wherein the displacement sampling unit (5) is used to detect the position state of the crane in real time, calculate the displacement distance and speed, and transmit the same to the main control unit (2) in time; the walking sampling unit (4) is used to detect whether the crane is in a walking state, and transmit a state signal to the main control unit (2) in real time; the main control unit (2) is used to control the windproof device (1) to perform windproof operation on the crane according to the monitoring data of the walking sampling unit (4) and the displacement sampling unit (5); the main control unit (2) enters a zero position calibration state after the walking sampling unit (4) samples that the crane is in a stop command state; the main control unit (2) determines whether the crane is in an inertial displacement state, and if there is no displacement, it makes another determination after a delay, and if there is still no displacement, it calibrates the current position as zero position; if there is displacement, it performs a crane reverse determination, and once there is a reverse signal, the main control unit (2) immediately performs zero position calibration.

2. The crane wind protection system according to claim 1, It is characterized in that The displacement sampling unit (5) is directly connected to the wheel axle (300) of the crane.

3. The crane wind protection system according to claim 1, It is characterized in that The displacement sampling unit (5) comprises a support (501), a sampling component (502), an adjusting component (503) and a transmission wheel (504); the transmission wheel (504) is connected to the trolley (100) via the support (501) and an adjusting component (503) is arranged between the transmission wheel (504) and the trolley (100); the sampling component (502) is connected to the axle of the transmission wheel (504).

4. The crane wind protection system according to claim 2 or 3, It is characterized in that The sampling component (502) adopts an encoder structure.

5. The crane wind protection system according to any one of claims 1 to 3, It is characterized in that It also includes a wind speed sampling unit (3), which is installed on the crane and connected to the main control unit (2) to detect the wind speed and wind direction at the work site in real time and transmit relevant signals to the main control unit (2).

6. The crane wind protection system according to any one of claims 1 to 3, It is characterized in that It also comprises a human-machine interaction unit (6), which is connected to the main control unit (2) and is used to display the system status in real time and set system parameters.

7. The crane wind protection system according to any one of claims 1 to 3, It is characterized in that It also comprises a data storage unit (7), wherein the data storage unit (7) is used to store system status, wind speed, displacement parameters and status values.

8. The crane wind protection system according to claims 1-3, It is characterized in that The windproof device (1) uses one or more of braking wheels, clamping wheels, clamping rails, supporting rails, and wedging wheels to perform windproof operations on the crane.

9. The crane wind protection system according to any one of claims 1 to 3, It is characterized in that It also includes a communication unit (8), which is one or more of PROFIBUS, PROFINET, CAN, and an Internet of Things terminal, and is used to communicate with one or more of a PLC, an industrial computer, or a remote monitoring system.

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