A port crane with real-time weighing system

Abstract

The present invention discloses a port crane with a real-time weighing system, including a boom, the boom is mounted on the crane, the movement of the boom is controlled by the crane, and the bottom surface of the boom forms a mounting surface; a first rope group and a second rope group with a weighing system, the first rope group and the second rope group are mounted on the bottom mounting surface of the boom, the first rope group and the second rope group have different lifting heights, and the cargo is lifted by the first rope group and the second rope group in sections; a lifting switching mechanism is slidably mounted on the mounting surface at the bottom of the boom, and the first rope group and the second rope group pass through the lifting switching mechanism respectively. The present invention can achieve high-precision weighing of cargo during the lifting process by combining staged lifting with static testing without affecting the lifting efficiency, thereby meeting the dual requirements of efficiency and precision in port operations.

Description

Technical Field

[0001] The invention relates to a crane, in particular to a port crane with a real-time weighing system. Background Art

[0002] In port cargo handling operations, cranes are one of the main transport equipment, and their role is to quickly and safely complete the lifting and transfer of cargo. With the continuous improvement of modern port logistics management requirements for cargo transportation efficiency and management accuracy, cranes have been given more additional functions, among which cargo weighing function has become an indispensable core technology.

[0003] At present, there are two main ways to implement cargo weighing of port cranes:

[0004] Dynamic weighing refers to the real-time measurement of cargo weight using a load cell installed on a hook or boom during the process of cargo lifting or moving. This method has certain efficiency advantages, but its accuracy is easily affected by dynamic factors such as cargo acceleration, vibration, and swing, as shown in the following:

[0005] During the lifting process, the inertial force caused by the acceleration of the cargo will be superimposed on the static weight of the cargo, resulting in inaccurate weighing results;

[0006] The goods will inevitably vibrate and swing during the lifting and moving process, which will cause the measurement signal of the weighing sensor to fluctuate, further reducing the measurement accuracy;

[0007] Dynamic weighing systems usually require complex algorithms to compensate for inertial forces and vibrations, which not only increases the complexity of equipment design, but also increases the difficulty of system maintenance.

[0008] Static weighing refers to weighing the goods when they are completely still. It is usually done by placing the goods on the ground or on a special weighing device. Static weighing has high accuracy, but its application has the following limitations:

[0009] The cargo requires extra handling and stop time to complete weighing, which is not conducive to efficient port operations;

[0010] The separation of weighing and lifting processes increases the complexity of cargo management and operation time.

[0011] In the existing technology, dynamic weighing and static weighing have their own advantages and disadvantages, but in practical applications, it is difficult to fully meet the efficiency and accuracy requirements of port operations:

[0012] Dynamic weighing is often difficult to achieve high-precision weighing due to its inevitable dynamic interference.

[0013] Although static weighing has high accuracy, it has a great impact on the efficiency of the operating process, especially in high-frequency lifting tasks where the efficiency advantage is insufficient. Summary of the invention

[0014] In order to solve the above problems, the present invention provides a port machinery crane with a real-time weighing system, which can achieve high-precision weighing of cargo during the lifting process by combining staged lifting and static testing without affecting the lifting efficiency, thereby meeting the dual requirements of efficiency and accuracy in port operations and effectively solving the shortcomings of the prior art.

[0015] The present invention is realized by the following technical scheme: a port crane with a real-time weighing system, comprising:

[0016] A boom, the boom being mounted on the crane, the movement of the boom being controlled by the crane, and the bottom surface of the boom forming a mounting surface;

[0017] A first lifting rope group and a second lifting rope group with a weighing system, wherein the first lifting rope group and the second lifting rope group are mounted on the bottom mounting surface of the boom, and cargo is lifted by sections between the first lifting rope group and the second lifting rope group;

[0018] A hoisting switching mechanism is slidably mounted on the mounting surface at the bottom of the boom, and the first hoisting rope group and the second hoisting rope group pass through the hoisting switching mechanism respectively;

[0019] A winding mechanism is installed on the bottom surface of the boom and away from the lifting ends of the first lifting rope group and the second lifting rope group. The winding mechanism is connected to the lifting switching mechanism through a connecting steel wire. After the connecting steel wire is wound up by the winding mechanism, the lifting switching mechanism is driven to move along the length direction of the boom and lift the first lifting rope group and the second lifting rope group.

[0020] The working states of the first lifting rope group and the second lifting rope group are switched by the lifting switching mechanism, and the first lifting rope group and the second lifting rope group are made to realize static weighing at different detection point positions.

[0021] As a preferred technical solution, when the first lifting rope group is weighed, the lifting switching mechanism disconnects the connection with the second lifting rope group, and the winding mechanism winds up the first lifting rope group, and the lifting switching mechanism moves along the length direction of the boom to lift the first lifting rope group. During this process, the second lifting rope group remains stationary, and stops after the first lifting rope group reaches the first detection point and starts the static test of the first lifting rope group.

[0022] When the second lifting rope group is being weighed, the lifting switching mechanism disconnects the first lifting rope group, and the winding mechanism winds up the second lifting rope group, and the lifting switching mechanism continues to move along the length direction of the boom to lift the second lifting rope group. During this process, the first lifting rope group is kept in a stationary weighing state by the locking mechanism, and stops when the second lifting rope group exceeds the first detection point and reaches the second detection point;

[0023] When the second lifting rope group is subjected to a static test at the second detection point, the lifting switching mechanism disconnects the second lifting rope group and connects the first lifting rope group. At this time, the winding mechanism continues to lift the first lifting rope group along the length direction of the boom. At this time, the second lifting rope group maintains a static weighing state through the locking mechanism. When the goods on the first lifting rope group arrives at the second detection point, the weighing of the goods on the second lifting rope group is completed. At this time, the lifting switching mechanism is respectively connected to the first lifting rope group and the second lifting rope group, and the winding mechanism drives the lifting switching mechanism to lift the first lifting rope group and the second lifting rope group at the same time to complete the lifting.

[0024] As a preferred technical solution, the first lifting rope group includes a first lifting rope, a first guide wheel mechanism, a first hook and a first retracting mechanism. The first retracting mechanism is fixedly mounted on the bottom mounting surface of the boom through a retracting fixing bracket. The first guide wheel mechanism is mounted on the bottom surface of the boom farthest from the first retracting mechanism. One end of the first lifting rope is fixedly wound on the first retracting mechanism. The locking mechanism is mounted on one side of the input end of the first guide wheel mechanism. The other end of the lifting rope passes through the lifting switching mechanism, the locking mechanism and the first guide wheel mechanism and is connected to the first hook. A weighing sensor system is provided on the contact lifting surface of the first hook and the cargo.

[0025] As a preferred technical solution, the first retractable mechanism includes a first retractable wheel and a first retractable motor, the first retractable motor is installed on one side of the retractable fixed bracket, and the output end of the first retractable motor is connected to the first retractable wheel, and the first retractable motor is a brake motor.

[0026] As a preferred technical solution, the second lifting rope group includes a second lifting rope, a second guide wheel mechanism, a second hook and a second retracting mechanism. The second retracting mechanism is fixedly mounted on the bottom mounting surface of the boom through a retracting fixing bracket. The second guide wheel mechanism is mounted on one side of the first guide wheel mechanism. One end of the second lifting rope is fixedly wound on the second retracting mechanism. The locking mechanism is mounted on one side of the input end of the second guide wheel mechanism. The other end of the lifting rope passes through the lifting switching mechanism, the locking mechanism and the second guide wheel mechanism and is connected to the second hook. A weighing sensor system is provided on the contact lifting surface of the second hook and the cargo.

[0027] As a preferred technical solution, the second retracting and deploying mechanism includes a second retracting and deploying wheel and a second retracting and deploying motor. The second retracting and deploying motor is installed on one side of the retracting and deploying fixed bracket, and the output end of the second retracting and deploying motor is connected to the second retracting and deploying wheel. The second retracting and deploying motor is a braking motor.

[0028] As a preferred technical solution, the hoisting switching mechanism includes a sliding box. The sliding box has two independent chambers. A first switching and locking mechanism is installed in one chamber, and a second switching and locking mechanism is installed in the other chamber;

[0029] Both the first switching and locking mechanism and the second switching and locking mechanism include a metal suction block fixedly installed on the top surface of the chamber and an electromagnet located at the bottom of the metal suction block. A guiding connecting shaft is provided between the top end face of the electromagnet and the top surface of the chamber. A wire hole is provided between the electromagnet and the metal block. The lifting ropes respectively pass through the wire holes. When the electromagnet is powered off, the electromagnet moves away from the metal suction block through the guiding connecting shaft, and a gap chamber is formed between the electromagnet and the metal suction block. At this time, the lifting ropes are in a loose and unlocked state. The connecting steel wire is connected to a connecting ear on one side of the sliding box;

[0030] The sliding box is provided with a slider on the surface slidably assembled with the lifting arm, and the lifting arm is provided with a chute corresponding to the position of the slider. The slider is slidably installed in the chute.

[0031] As a preferred technical solution, the locking mechanism includes a first locking mechanism and a second locking mechanism. Both the first locking mechanism and the second locking mechanism include a locking frame in a "Ji" shape. The two ends of the locking frame respectively pass through through slots opened on the lifting arm and extend into the hollow cavity at the upper end of the lifting arm. A locking cavity is formed in the middle of the locking frame. The lifting ropes pass through the locking cavity. A locking gasket is fixedly installed on the lifting arm at the position of the top surface of the locking cavity. The through slots are located on both sides of the locking gasket. The locking gasket has an arc-shaped positioning groove for positioning the lifting ropes;

[0032] An extension convex part is respectively formed on both sides of the top of the locking frame. An oil cylinder or a cylinder is fixedly installed on the lifting arm at the bottom of the extension convex part. The locking frame is driven to rise by the upward movement of the oil cylinder or the cylinder, thereby locking the lifting ropes located in the locking cavity.

[0033] As a preferred technical solution, a guiding transition wheel is further provided at the bottom of the second guide wheel mechanism. The first lifting rope is in guiding contact with the guiding transition wheel and the first guide wheel mechanism.

[0034] As a preferred technical solution, the winding mechanism includes a winding wheel and a winding motor, the winding motor is connected to the winding wheel, the winding motor is fixedly mounted on a motor bracket, the motor bracket is fixedly mounted on the boom, and the connecting steel wire is fixedly wound on the winding wheel.

[0035] The beneficial effects of the present invention are as follows: the present invention divides the cargo of the rated hoisting weight into two piles, and hoists them successively, and utilizes the time interval when one pile of cargo is lifted to realize the static weighing of the other pile of cargo. The present invention can realize the rapid switching of the lifting of the two piles of cargo through the lifting switching mechanism, and the winding mechanism is in a continuous winding state without stopping, thereby ensuring the continuity of the entire lifting process, achieving the purpose of static weighing in the dynamic lifting process, greatly improving the working efficiency, and ensuring the accuracy of weighing;

[0036] And because the heavier mass goods are divided into two piles and lifted one after another, the lifting mass of each pile of goods will be reduced, so the lifting speed can be greatly improved, making up for the time loss problem caused by lifting one after another. Compared with lifting the total mass of goods at the same time, the method of lifting one after another can increase the lifting speed. In this way, the purpose of static weighing can be achieved by utilizing the time gap without losing efficiency, and static weighing can be realized during dynamic lifting, so that the weighing accuracy is greatly improved compared with the dynamic weighing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0039] Figure 2 The bottom structure of the present invention is shown in FIG. Figure 1 ;

[0040] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A;

[0041] Figure 4 The bottom structure of the present invention is shown in FIG. Figure 2 ;

[0042] Figure 5 It is a partial enlarged view of the present invention;

[0043] Figure 6The overall structure of the present invention is shown in FIG. Figure 2 ;

[0044] Figure 7 For the present invention Figure 6 A partial enlarged view of point B in the middle;

[0045] Description of reference numerals:

[0046] 1. Boom; 4. Hoisting switching mechanism; 5. First lifting rope; 6. Second lifting rope; 18. First guide wheel mechanism; 16. Second guide wheel mechanism; 7. First lifting hook; 8. Second lifting hook; 12. First retractable wheel; 14. Second retractable wheel; 11. First retractable motor; 40. Second retractable motor; 41. Sliding box; 26. First switching locking mechanism; 25. Second switching locking mechanism; 28. Metal suction block; 31. Electromagnet; 30. Guide connecting shaft; 15. Connecting steel wire; 29. ​​Sliding block; 3. First locking mechanism; 2. Second locking mechanism; 24. Locking frame; 21. Locking gasket; 22. Cylinder; 17. Guide transition wheel; 9. Winding wheel; 20. Winding motor; 10. Motor bracket; 13. Retractable fixing bracket; 19. Mounting surface; 23. Extended protrusion; 27. Wire hole; 32. Connecting ear. DETAILED DESCRIPTION

[0047] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0048] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0049] like Figure 1 and Figure 2 As shown, a port crane with a real-time weighing system of the present invention comprises a boom 1, wherein the boom 1 is mounted on the crane, and the movement of the boom 1 is controlled by the crane, and the bottom surface of the boom 1 forms a mounting surface 19;

[0050] The first lifting rope group 5 and the second lifting rope group 6 with a weighing system are installed on the bottom mounting surface 19 of the boom 1. The first lifting rope group 5 and the second lifting rope group 6 have different lifting heights. The cargo is lifted by dividing the first lifting rope group 5 and the second lifting rope group 6 into sections. In this embodiment, the first lifting rope group 5 and the second lifting rope group 6 can also have the same lifting height. The different lifting heights mentioned here refer to the different lengths of the first lifting rope group 5 and the second lifting rope group 6 when lifting. For example, the length of the first lifting rope group 5 can be shorter than the length of the second lifting rope group 6. The purpose is to lift the first lifting rope group 5 first, while the second lifting rope group 6 is still in a static lifting state of the cargo. Of course, the lifting heights of the first lifting rope group 5 and the second lifting rope group 6 can be set to be the same. When lifting the first lifting rope group 5, the second lifting rope group 6 can be disconnected first, which can also meet the lifting requirements.

[0051] In order to arbitrarily connect and disconnect the first lifting rope group 5 and the second lifting rope group 6 during the lifting process, the present embodiment further includes a lifting switching mechanism 4, which is slidably mounted on the mounting surface 19 at the bottom of the boom 1. The first lifting rope group 5 and the second lifting rope group 6 pass through the lifting switching mechanism 4 respectively. Through the lifting switching mechanism 4, the first lifting rope group 5 and the second lifting rope group 6 can be quickly switched to be connected or disconnected with the lifting switching mechanism 4 during the dynamic lifting process. The disconnected lifting rope group is in a static weighing state and is not affected by the pulling lifting action.

[0052] In order to lift the first lifting rope group 5 and the second lifting rope group 6, the present embodiment also includes a winding mechanism, which is installed on the bottom surface of the boom 1 and away from the lifting ends of the first lifting rope group 5 and the second lifting rope group 6. The winding mechanism is connected to the lifting switching mechanism 4 by a connecting wire 15. After the connecting wire 15 is wound up by the winding mechanism, the lifting switching mechanism 4 is driven to move along the length direction of the boom 1, and the first lifting rope group 5 and the second lifting rope group 6 are lifted. When the first lifting rope group 5 is disconnected from the lifting switching mechanism 4 and the second lifting rope group 6 is connected to the lifting switching mechanism 4, the winding mechanism of the winding mechanism will only drive the second lifting rope group 6 to perform lifting action, and the first lifting rope group 5 is in a static weighing state.

[0053] In this embodiment, the working states of the first lifting rope group 5 and the second lifting rope group 6 can be switched by the lifting switching mechanism 4, and the first lifting rope group 5 and the second lifting rope group 6 can be made to perform static weighing at different detection point positions.

[0054] Specifically, when the first lifting rope 5 group is weighed, the lifting switching mechanism 4 disconnects the connection with the second lifting rope 6 group, and the winding mechanism is wound at this time, and the first lifting rope 5 group is lifted by moving along the length direction of the boom 1 through the lifting switching mechanism 4. During this process, the second lifting rope 6 group remains stationary (i.e., remains in the initial lifting position), and stops after the first lifting rope 5 group reaches the first detection point and starts the static test of the first lifting rope 5 group;

[0055] When the second lifting rope group 6 is being weighed, the lifting switching mechanism 4 disconnects the first lifting rope group 5 from the second lifting rope group. The second lifting rope group 6 is then reeled in by the reeling mechanism, and the lifting switching mechanism 4 continues to move along the length direction of the boom 1 to lift the second lifting rope group 6. During this process, the first lifting rope group 5 is kept in a static weighing state (suspended) by the locking mechanism, and stops after the second lifting rope group 6 exceeds the first detection point and reaches the second detection point (the second detection point is located at the upper end of the first detection point, such as a height difference of 2-3 meters);

[0056] When the second lifting rope group 6 is subjected to a static test at the second detection point, the lifting switching mechanism 4 disconnects the second lifting rope group 6 and connects the first lifting rope group 5. At this time, the winding mechanism continues to lift the first lifting rope group 5 along the length direction of the boom 1. At this time, the second lifting rope group 6 is kept in a static weighing state by the locking mechanism. When the goods on the first lifting rope group 5 arrives at the second detection point, the weighing of the goods on the second lifting rope group 6 is completed. At this time, the lifting switching mechanism 4 is respectively connected to the first lifting rope group 5 and the second lifting rope group 6, and the winding mechanism drives the lifting switching mechanism 4 to lift the first lifting rope group 5 and the second lifting rope group 6 at the same time to complete the lifting.

[0057] Specific examples are as follows:

[0058] The rated lifting weight is set to N tons. The first lifting rope group 5 and the second lifting rope group 6 lift N / 2 tons respectively (in the actual process, the lifting weight values ​​of the two piles of goods cannot be evenly distributed due to various reasons, and are not necessarily evenly divided. For the sake of better example, the weight divided in this embodiment is exactly half). The entire lifting height is assumed to be 16 meters. The first detection point is 5 meters from the ground, and the second detection point is 10 meters from the ground. When the first lifting rope group 5 is lifting, the second lifting rope group 6 is disconnected. At this time, the first lifting rope group 5 and the upper cargo are lifted. It is assumed that the lifting speed of the cargo with a weight of N / 2 tons is 1 meter per second, and the lifting speed of the cargo lifted by N tons at the same time is 0.5 meters per second (the greater the load, the lower the lifting speed needs to be, so as not to damage the crane due to excessive load). When the first lifting rope group 5 is lifting, the cargo with a weight of N / 2 tons is lifted to the first detection point at a speed of 1 meter per second and then stopped to achieve static weighing;

[0059] At this time, the first lifting rope group 5 is disconnected, and the first lifting rope group 5 is locked by the locking mechanism and maintained in a static weighing state, and the second lifting rope group 6 is connected to the lifting switching mechanism 4. At this time, the second lifting rope group 6 is continued to be reeled in and lifted by the reeling mechanism. The second lifting rope group 6 lifts N / 2 tons of cargo and rises to the second detection point at a speed of 1 meter per second, that is, stops after the position of 10 meters. At this time, the second lifting rope group 6 is locked by the locking mechanism. At this time, the second lifting rope group 6 is disconnected from the lifting switching mechanism 4, and the lifting switching mechanism 4 is connected to the first lifting rope. Rope 5 groups are connected, and the winding mechanism keeps winding continuously. The first lifting rope group 5 rises to the second detection point, that is, from the 5-meter position to the 10-meter position. This process completes the static weighing of the second lifting rope group 6. When the second detection point is reached, the first lifting rope group 5 and the second lifting rope group 6 are both connected to the lifting switching mechanism 4. At this time, the winding mechanism simultaneously lifts the first lifting rope group 5 and the second lifting rope group 6 to the specified height, and the weight values ​​measured by the first lifting rope group 5 and the second lifting rope group 6 are added together, which is the total mass of the lifted goods.

[0060] like Figure 2-Figure 5 As shown, the first lifting rope group 5 includes a first lifting rope 5, a first guide wheel mechanism 18, a first hook 7 and a first retracting mechanism. The first retracting mechanism is fixedly mounted on the bottom mounting surface 19 of the boom 1 through a retracting fixing bracket 13. The first guide wheel mechanism 18 is mounted on the bottom surface of the boom 1 farthest from the first retracting mechanism. One end of the first lifting rope 5 is fixedly wound on the first retracting mechanism. The locking mechanism is mounted on one side of the input end of the first guide wheel mechanism 18. The other end of the lifting rope passes through the lifting switching mechanism 4, the locking mechanism and the first guide wheel mechanism 18 and is connected to the first hook 7. The contact lifting surface of the first hook 7 with the cargo is provided with a weighing sensor system. The weighing sensor system can be a weighing sensor arranged between the hook and the cargo hooking surface. When lifting the cargo, the weight is borne on the weighing sensor to complete the weighing. The first guide wheel mechanism 18 is used as a movement guide for the first lifting rope 5.

[0061] like Figure 2 As shown, the first retractable mechanism includes a first retractable wheel 12 and a first retractable motor 11, wherein the first retractable motor 11 is mounted on one side of the retractable fixed bracket 13, and the output end of the first retractable motor 11 is connected to the first retractable wheel 12, and the first retractable motor 11 is a brake motor, and the first suspension rope 5 is retracted and released by the first retractable motor 11, and the first suspension rope 5 is wound around the first retractable wheel 12, or the first suspension rope 5 is released from the first retractable wheel 12.

[0062] The second lifting rope group 6 includes a second lifting rope 6, a second guide wheel mechanism 16, a second hook 8 and a second retracting mechanism. The second retracting mechanism is fixedly mounted on the bottom mounting surface 19 of the boom 1 through a retracting fixing bracket 13. The second guide wheel mechanism 16 is mounted on one side of the first guide wheel mechanism 18. One end of the second lifting rope 6 is fixedly wound on the second retracting mechanism. The locking mechanism is mounted on one side of the input end of the second guide wheel mechanism 16. The other end of the lifting rope passes through the lifting switching mechanism 4, the locking mechanism and the second guide wheel mechanism 16 and is connected to the second hook 8. A weighing sensor system is provided on the contact lifting surface of the second hook 8 with the cargo.

[0063] The second retractable mechanism includes a second retractable wheel 14 and a second retractable motor 40. The second retractable motor 40 is installed on one side of the retractable fixed bracket 13, and the output end of the second retractable motor 40 is connected to the second retractable wheel 14. The second retractable motor 40 is a brake motor. The working principle of the second suspension rope group 6 is the same as that of the first suspension rope group 5, which will not be described in detail here. The first retractable mechanism and the second retractable mechanism can be manually controlled to retract the suspension rope, or the retractable time and interval can be automatically set to achieve automatic retraction.

[0064] like Figure 5-Figure 7 As shown, the lifting switch mechanism 4 includes a sliding box 41, and the sliding box 41 has two independent chambers, wherein the first switch locking mechanism 26 is installed in one chamber, and the second switch locking mechanism 25 is installed in the other chamber, the first lifting rope 5 passes through the first switch locking mechanism 26, and the second lifting rope 6 passes through the second switch locking mechanism 25;

[0065] Among them, both the first switching and locking mechanism 26 and the second switching and locking mechanism 25 include a metal suction block 28 fixedly installed on the top surface of the chamber, and an electromagnet 31 located at the bottom of the metal suction block 28. A guiding connecting shaft 30 is provided between the top end face of the electromagnet 31 and the top surface of the chamber. A wire hole 27 is provided between the electromagnet 31 and the metal block. The lifting ropes pass through the wire holes 27 respectively. When the electromagnet 31 is powered off, the electromagnet 31 moves away from the metal suction block 28 through the guiding connecting shaft 30, and a clearance cavity is formed between the electromagnet 31 and the metal suction block 28. At this time, the lifting ropes are in a loose and unlocked state. The connecting steel wire 15 is connected to the connecting ear 32 on one side of the sliding box 41. Specifically, when it is necessary to disconnect the first group of lifting ropes 5 and connect the second group of lifting ropes 6, only the electromagnet 31 in the first switching and locking mechanism 26 needs to be powered off. At this time, the clearance of the wire hole 27 can be increased, and the first lifting rope 5 is loosened in the wire hole 27. At this time, the entire sliding box 41 can pass through the first lifting rope 5 during movement without pulling the first lifting rope 5. On the contrary, the second lifting ropes 6 of the second group of lifting ropes 6 are attracted and pressed by the electromagnet 31 and the metal suction block 28. In this way, the movement of the sliding box 41 can pull the second group of lifting ropes 6 and the goods at the upper end. The electromagnet 31 can be a high-magnetic-attraction electromagnet 31 to increase the pressing force on the lifting ropes. Therefore, the entire switching process needs to be completed by energizing and de-energizing the electromagnet 31, which is very convenient. The electromagnet 31 can be controlled and set by a controller to achieve automatic power-on and power-off.

[0066] In order to enable the sliding box 41 to slide along the length direction of the boom 1, in this embodiment, a slider 29 is provided on the surface of the sliding box 41 that is slidably assembled with the boom 1. A chute is provided on the boom 1 at the position corresponding to the slider 29, and the slider 29 is slidably installed in the chute.

[0067] Among them, as Figure 5 shown, the locking mechanism includes a first locking mechanism 3 and a second locking mechanism 2. Both the first locking mechanism 3 and the second locking mechanism 2 include a locking frame 24 in a "ji" shape. Both ends of the locking frame 24 pass through the through slots opened on the boom 1 and extend into the hollow cavity at the upper end of the boom 1. A locking cavity is formed in the middle of the locking frame 24. The lifting rope passes through the locking cavity. A locking gasket 21 is fixedly installed on the boom 1 at the position of the top surface of the locking cavity. The through slots are located on both sides of the locking gasket 21. The locking gasket 21 has an arc-shaped positioning groove for positioning the lifting rope;

[0068] An extended protrusion 23 is formed on both sides of the top of the locking frame 24, and an oil cylinder or an air cylinder 22 is fixedly installed on the boom 1 at the bottom of the extended protrusion 23. The locking frame 24 is driven to rise by the upward action of the oil cylinder or the cylinder 22, thereby locking the lifting rope in the locking chamber. In this embodiment, the lifting rope can be pressed against the locking gasket 21 by controlling the air cylinder 22 or the oil cylinder to lift the locking frame 24, so as to achieve the locking purpose. The locking mechanism is set to keep the cargo on the first lifting rope group 5 or the second lifting rope group 6 statically suspended, and the locking mechanism can be released when rising.

[0069] like Figure 5 As shown, a guide transition wheel 17 is also provided on the bottom of the second guide wheel mechanism 16, and the first suspension rope 5 is in guiding contact with the guide transition wheel 17 and the first guide wheel mechanism 18. The first suspension rope 5 is guided by the guide transition wheel 17 and the first guide wheel mechanism 18 to complete the routing.

[0070] Among them, the winding mechanism includes a winding wheel 9 and a winding motor 20, the winding motor 20 is connected to the winding wheel 9, the winding motor 20 is fixedly installed on the motor bracket 10, the motor bracket 10 is fixedly installed on the boom 1, the connecting steel wire 15 is fixedly wound on the winding wheel 9, and the winding of the connecting steel wire 15 is achieved by the winding motor 20, so that the sliding box 41 moves along the length direction of the boom 1.

[0071] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A port crane with a real-time weighing system, characterized in that: include: A boom (1), the boom (1) being mounted on the crane, the movement of the boom (1) being controlled by the crane, and the bottom surface of the boom (1) forming a mounting surface (19); A first lifting rope (5) group and a second lifting rope (6) group with a weighing system, wherein the first lifting rope (5) group and the second lifting rope (6) group are mounted on a bottom mounting surface (19) of the boom (1), and cargo is lifted in sections by means of the first lifting rope (5) group and the second lifting rope (6) group; A lifting switching mechanism (4) is slidably mounted on a mounting surface (19) at the bottom of the lifting arm (1), and the first lifting rope (5) group and the second lifting rope (6) group respectively pass through the lifting switching mechanism (4); A reeling mechanism is installed on the bottom surface of the boom (1) and away from the lifting ends of the first lifting rope (5) group and the second lifting rope (6) group. The reeling mechanism is connected to the lifting switching mechanism (4) via a connecting steel wire (15). After the reeling mechanism reels up the connecting steel wire (15), the lifting switching mechanism (4) is driven to move along the length direction of the boom (1) and lift the first lifting rope (5) group and the second lifting rope (6) group. The working states of the first lifting rope (5) group and the second lifting rope (6) group are switched by the lifting switching mechanism (4), and the first lifting rope (5) group and the second lifting rope (6) group are made to realize static weighing at different detection point positions.

2. The port crane with real-time weighing system according to claim 1, characterized in that: When the first lifting rope (5) group is weighed, the lifting switching mechanism (4) disconnects the connection with the second lifting rope (6) group, and the winding mechanism is wound up at this time, and the first lifting rope (5) group is lifted by moving along the length direction of the boom (1) through the lifting switching mechanism (4). During this process, the second lifting rope (6) group remains stationary, and stops after the first lifting rope (5) group reaches the first detection point and starts the static test of the first lifting rope (5) group; When the second lifting rope (6) group is being weighed, the lifting switching mechanism (4) disconnects the connection between the second lifting rope (6) group and the first lifting rope (5) group, and the second lifting rope (6) group is then reeled in by the reeling mechanism, and the second lifting rope (6) group is lifted by the lifting switching mechanism (4) and continues to move along the length direction of the boom (1). During this process, the first lifting rope (5) group is kept in a stationary weighing state by the locking mechanism, and stops after the second lifting rope (6) group exceeds the first detection point and reaches the second detection point; When the second lifting rope (6) group is subjected to a static test at the second detection point, the lifting switching mechanism (4) disconnects the second lifting rope (6) group and connects the first lifting rope (5) group. At this time, the winding mechanism continues to lift the first lifting rope (5) group along the length direction of the boom (1). At this time, the second lifting rope (6) group is kept in a static weighing state by the locking mechanism. When the goods on the first lifting rope (5) group arrives at the second detection point, the weighing of the goods on the second lifting rope (6) group is completed. At this time, the lifting switching mechanism (4) is respectively connected to the first lifting rope (5) group and the second lifting rope (6) group, and the winding mechanism drives the lifting switching mechanism (4) to lift the first lifting rope (5) group and the second lifting rope (6) group at the same time to complete the lifting.

3. The port crane with real-time weighing system according to claim 1, characterized in that: The first lifting rope (5) group comprises a first lifting rope (5), a first guide wheel mechanism (18), a first lifting hook (7) and a first retracting mechanism. The first retracting mechanism is fixedly mounted on the bottom mounting surface (19) of the boom (1) via a retracting fixing bracket (13). The first guide wheel mechanism (18) is mounted on the bottom surface of the boom (1) farthest from the first retracting mechanism. One end of the first lifting rope (5) is fixedly wound on the first retracting mechanism. The locking mechanism is mounted on one side of the input end of the first guide wheel mechanism (18). The other end of the lifting rope passes through the lifting switching mechanism (4), the locking mechanism and the first guide wheel mechanism (18) and is connected to the first lifting hook (7). A weighing sensor system is provided on the lifting surface of the first lifting hook (7) in contact with the cargo.

4. The port crane with real-time weighing system according to claim 3, characterized in that: The first retractable mechanism comprises a first retractable wheel (12) and a first retractable motor (11); the first retractable motor (11) is mounted on one side of the retractable fixed bracket (13); an output end of the first retractable motor (11) is connected to the first retractable wheel (12); and the first retractable motor (11) is a brake motor.

5. The port crane with real-time weighing system according to claim 1, characterized in that: The second lifting rope (6) group comprises a second lifting rope (6), a second guide wheel mechanism (16), a second lifting hook (8) and a second retracting and releasing mechanism. The second retracting and releasing mechanism is fixedly mounted on the bottom mounting surface (19) of the boom (1) via a retracting and releasing fixing bracket (13). The second guide wheel mechanism (16) is mounted on one side of the first guide wheel mechanism (18). One end of the second lifting rope (6) is fixedly wound on the second retracting and releasing mechanism. The locking mechanism is mounted on one side of the input end of the second guide wheel mechanism (16). The other end of the lifting rope passes through the lifting switching mechanism (4), the locking mechanism and the second guide wheel mechanism (16) and is connected to the second lifting hook (8). A weighing sensor system is provided on the lifting surface where the second lifting hook (8) contacts the cargo.

6. The port crane with real-time weighing system according to claim 5, characterized in that: The second retractable mechanism comprises a second retractable wheel (14) and a second retractable motor (40); the second retractable motor (40) is mounted on one side of the retractable fixed bracket (13); and the output end of the second retractable motor (40) is connected to the second retractable wheel (14); the second retractable motor (40) is a brake motor.

7. The port crane with real-time weighing system according to claim 1, characterized in that: The hoisting switching mechanism (4) includes a sliding box (41). The sliding box (41) has two independent chambers. A first switching and locking mechanism (26) is installed in one chamber, and a second switching and locking mechanism (25) is installed in the other chamber. Both the first switching and locking mechanism (26) and the second switching and locking mechanism (25) include a metal suction block (28) fixedly installed on the top surface of the chamber and an electromagnet (31) located at the bottom of the metal suction block (28). A guiding connecting shaft (30) is provided between the top end face of the electromagnet (31) and the top surface of the chamber. A wire hole (27) is provided between the electromagnet (31) and the metal block. The hoisting ropes respectively pass through the wire holes (27). When the electromagnet (31) is powered off, the electromagnet (31) moves away from the metal suction block (28) through the guiding connecting shaft (30), and a gap chamber is formed between the electromagnet (31) and the metal suction block (28). At this time, the hoisting ropes are in a loose and unlocked state. The connecting steel wire (15) is connected to a connecting ear (32) on one side of the sliding box (41). A slider (29) is provided on the surface where the sliding box (41) is slidably assembled with the boom (1). A chute is provided on the boom (1) corresponding to the position of the slider (29), and the slider (29) is slidably installed in the chute.

8. The port crane with real-time weighing system according to claim 2, characterized in that: The locking mechanism includes a first locking mechanism (3) and a second locking mechanism (2). Both the first locking mechanism (3) and the second locking mechanism (2) include a locking frame (24) in a "Ji" shape. The two ends of the locking frame (24) respectively pass through through slots opened on the boom (1) and extend into the hollow cavity at the upper end of the boom (1). A locking cavity is formed in the middle of the locking frame (24). The hoisting rope passes through the locking cavity. A locking gasket (21) is fixedly installed on the boom (1) at the top surface position of the locking cavity. The through slots are located on both sides of the locking gasket (21). The locking gasket (21) has an arc-shaped positioning groove for positioning the hoisting rope. An extension convex part (23) is respectively formed on both sides of the top of the locking frame (24). An oil cylinder or a cylinder (22) is fixedly installed on the boom (1) at the bottom of the extension convex part (23). The locking frame (24) is driven to rise by the upward movement of the oil cylinder or the cylinder (22), thereby locking the hoisting rope located in the locking cavity.

9. The port crane with real-time weighing system according to claim 5, characterized in that: A guiding transition wheel (17) is further provided at the bottom of the second guiding wheel mechanism (16). The first hoisting rope (5) is in guiding contact with the guiding transition wheel (17) and the first guiding wheel mechanism (18).

10. The port crane with real-time weighing system according to claim 1, characterized in that: The winding mechanism includes a winding wheel (9) and a winding motor (20). The winding motor (20) is connected to the winding wheel (9). The winding motor (20) is fixedly installed on a motor bracket (10). The motor bracket (10) is fixedly installed on the boom (1). The connecting steel wire (15) is fixedly wound on the winding wheel (9).

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