Bridge crane control system simulation training system

Abstract

The present application relates to the technical field of bridge crane, in particular to a bridge crane control system simulation training system, which comprises a lifting appliance, a container and a lock head arranged on the top of the container; the lifting appliance comprises a main beam and a support arm arranged at both ends of the main beam and capable of moving relative to the main beam; the bottom of both ends of the support arm is provided with a lock tongue used for locking with the lock head on the top of the container; the bottom center of the support arm and the main beam is provided with a detection assembly, which comprises a laser range finder, a driving assembly for driving the laser range finder to move along the length direction of the main beam and an alarm connected with a controller; after the lock tongue is locked with the lock head, the electric push rod pushes the lock column to insert into the lock hole to lock the rotating shaft to prevent it from rotating; the rotating shaft is locked, which can prevent the container from falling due to the rotating of the rotating shaft caused by failure or the rotating of the rotating shaft caused by the misoperation of the operator during the transfer of the container, thereby improving the safety of the operation of the container.

Description

Technical Field

[0001] This invention relates to the field of bridge crane technology, and more specifically, to a bridge crane control system simulation training system. Background Technology

[0002] Bridge cranes are mainly used for loading and unloading containers in ports. During the container transfer process, the spreaders on the bridge crane are used to hook and lock the containers to connect them to the spreaders. Generally, there are lock heads at the four corners of the top of the container. The spreaders on the bridge crane are equipped with locking tongues that correspond to the lock heads. After the locking tongue is inserted into the lock head, it can be rotated 90 degrees to lock with the lock head, so that subsequent lifting work can be carried out.

[0003] A search revealed that patent CN113511593A discloses an integrated bridge crane lifting control system, including a PLC and a lifting device; the lifting device includes a main beam and is equipped with...

[0004] The support arm is located at both ends of the main beam and can be displaced relative to the main beam. The bottom of both ends of the support arm is provided with twist locks for locking with the top lock of the container. The support arm also includes a detection mechanism, which includes a scanning component located at the bottom of the support arm and a drive mechanism for driving the scanning component to move along the length of the main beam.

[0005] The aforementioned patent can scan the gap between two adjacent containers, thus avoiding the spreader clamping two containers. However, after the torsion lock is locked with the lock head by a motor, the patent does not add an additional locking mechanism to the shaft to prevent the shaft from rotating. If the shaft rotates due to a malfunction or operator error, it is easy for the torsion lock and lock head to become misaligned. The torsion lock may disengage from the lock head, causing the container to fall, thus posing a safety hazard. Therefore, improvements are needed. Summary of the Invention

[0006] The purpose of this invention is to provide a bridge crane control system simulation training system to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A bridge crane control system simulation training system includes a spreader, a container, and a lock head on the top of the container. The spreader includes a main beam and outriggers at both ends of the main beam that can move relative to the main beam. The bottom of each outrigger has a locking tongue for engaging with the lock head on the top of the container. Both the outriggers and the main beam have a detection component at their bottom center. The detection component includes a laser rangefinder, a drive component for moving the laser rangefinder along the length of the main beam, and an alarm connected to a controller. The laser rangefinder scans the top area of ​​the container to determine if there is a gap on the top of the container. When the laser rangefinder detects a gap on the top of the container, the controller activates the alarm.

[0009] The lock cylinder has a lock cavity with a slot communicating with it. The bolt extends into the lock cavity from the slot and rotates 90 degrees to lock with the lock cylinder. The bolt has a receiving cavity with a sliding block inside. The upper surface of the sliding block includes an inclined surface, a horizontal surface, and an arc surface. The horizontal surface is located in the middle, and the inclined surface and arc surface are located on both sides of the horizontal surface. The lock cylinder also includes a wedge block that wedges with the inclined surface, a pressure rod, a pressure plate, and a lifting column. The bottom end of the lifting column is fixedly connected to the wedge block, and the top end of the pressure rod extends to the outside of the receiving cavity and is fixedly connected to a pressure plate. The lock cylinder also includes a lifting column with a roller rotatably mounted at its bottom end. The roller is placed on the arc surface, and the top end of the lifting column extends out of the receiving cavity. The top of the lock cylinder has a second through hole communicating with the lock cavity. When the bolt locks with the lock cylinder, the bolt is raised. The pressure plate abuts against the top of the inner wall of the receiving cavity, pushing the wedge block down. The wedge block drives the sliding block to slide, causing the lifting column to rise and insert into the second through hole.

[0010] Preferably, the driving assembly includes a strip seat, a lead screw, and a second motor. The bottom of the strip seat has a groove, and a slider is slidably connected in the groove. The lead screw is rotatably connected in the groove, and the slider is threadedly connected to the lead screw. The second motor drives the lead screw to rotate, and the laser rangefinder is installed at the bottom of the slider.

[0011] Preferably, both ends of the support arm are equipped with fixed seats. The fixed seats are provided with an upper cavity and a lower cavity from top to bottom. A first motor is installed in the upper cavity, and a rotating shaft is rotatably connected in the lower cavity. The bottom end of the rotating shaft extends downward out of the lower cavity and is fixedly connected to the locking tongue. The top end of the rotating shaft extends upward into the upper cavity and is coaxially connected to the output shaft of the first motor.

[0012] Preferably, an electric push rod is installed on one side of the inner wall of the lower cavity. The extended end of the electric push rod is connected to a locking pin. A locking hole is opened on the rotating shaft. When the lock tongue is locked with the lock head, the locking hole is aligned with the locking pin. The electric push rod pushes the locking pin into the locking hole to lock the rotating shaft and prevent it from rotating.

[0013] Preferably, a positive electrode contact, a negative electrode contact, and a first pressure sensor are installed on one side of the inner wall of the lower cavity. A meshing gear and a rack are provided inside the lower cavity. The gear is fixedly connected to a rotating shaft, and the rack is slidably connected to the inner wall of the lower cavity. A conductive plate is fixedly connected to the end of the rack near the positive electrode contact, and an upper plate is fixed to the top of the conductive plate. When the conductive plate moves to the position of the positive electrode contact, the first pressure sensor is energized when the conductive plate simultaneously abuts against both the positive and negative electrodes. At this time, the upper plate abuts against the first pressure sensor. When the first pressure sensor detects a pressure value, the controller controls the laser rangefinder to work. When the first pressure sensor does not detect a pressure value, the controller controls the laser rangefinder to stop working.

[0014] Preferably, a second pressure sensor is installed on the top of the latch below the pressure plate. When the conductive plate simultaneously abuts against the positive and negative contacts, the second pressure sensor is energized. When the pressure plate moves down and abuts against the second pressure sensor, causing the second pressure sensor to detect a pressure value, the controller controls the electric push rod to push the lock pin into the lock hole. When the second pressure sensor does not detect a pressure value, the controller controls the electric push rod to pull the lock pin out of the lock hole.

[0015] Preferably, a first spring is sleeved on the pressure rod, the top end of the first spring is fixedly connected to the top of the inner wall of the accommodating cavity, and the bottom end of the first spring is fixedly connected to the wedge block. It also includes a horizontally arranged second spring, one end of the second spring is fixedly connected to the moving block, and the other end of the second spring is fixedly connected to the inner side wall of the accommodating cavity. A limit ring is fixedly fixed at the lower part of the lifting column, and a sleeve is sleeved on the upper part of the lifting column. The sleeve is fixedly connected to the top of the inner wall of the accommodating cavity. A third spring is sleeved in the middle of the lifting column, and the top and bottom ends of the third spring are fixedly connected to the sleeve and the limit ring, respectively.

[0016] Beneficial effects:

[0017] First, after the locking tongue and the lock head are engaged, the electric push rod pushes the locking pin into the lock hole to lock the shaft and prevent it from rotating. Locking the shaft can prevent the container from falling due to a faulty shaft or operator error during container transfer, thus improving the safety of container operation.

[0018] Secondly, when the latch and the lock head are engaged, during the lifting of the spreader, the latch moves upward to first bring the pressure plate against the top of the inner wall of the lock cavity. As the latch continues to move upward, it causes the pressure plate to press down on the pressure rod, which in turn moves the wedge block downward. The downward movement of the wedge block stretches the first spring. Since the wedge block is engaged with the inclined plane, it can move the moving block horizontally. The movement of the moving block compresses the second spring. When the moving block moves horizontally, the roller rolls along the arc surface. When the latch moves upward and the top of the latch comes into contact with the top of the inner wall of the lock cavity, the pressure plate stops moving downward. The roller moves from the arc surface to the horizontal surface, and the third spring is compressed. During this process, the lifting column is always in an upward state. When the roller moves from the arc surface to the horizontal surface, the top of the lifting column extends into the second through hole. At this time, when lifting the container spreader, the latch will not slide a large distance in the lock cavity of the lock head, thus avoiding large-distance swaying of the container when the spreader is moved, resulting in better stability.

[0019] Finally, when the conductive plate moves and comes into contact with the positive and negative contacts, an electrical circuit is formed. At this time, the second pressure sensor and the first pressure sensor are energized and work. Before the conductive plate moves and comes into contact with the positive and negative contacts to form an electrical circuit, the second pressure sensor and the first pressure sensor do not work. This can save energy and also prevent the second pressure sensor and the first pressure sensor from working for a long time, which will affect their service life. Attached Figure Description

[0020] Figure 1 This is one of the structural schematic diagrams of the lifting device in this invention.

[0021] Figure 2 This is the second schematic diagram of the lifting device in this invention.

[0022] Figure 3 This is one of the schematic diagrams showing the state in which the spreader is simultaneously clamped between two containers in this invention.

[0023] Figure 4 This is the second schematic diagram of the state in which the spreader is simultaneously clamped between two containers in this invention.

[0024] Figure 5 This is a schematic diagram of the structure after the locking tongue extends into the lock head in this invention.

[0025] Figure 6 This is a cross-sectional view of the fixing base and the lock head in this invention.

[0026] Figure 7 For the present invention Figure 6 A magnified structural diagram of point A in the middle.

[0027] Figure 8 This is a schematic diagram of the detection component in this invention.

[0028] Figure 9 This is a schematic diagram of the locking tongue in this invention.

[0029] Figure 10 This is a cross-sectional view of the locking tongue in this invention.

[0030] Figure 11 This is a schematic diagram of the structure of the moving block, wedge block, and lifting column in this invention.

[0031] The meanings of the labels in the diagram are as follows: 10. Main beam; 11. Support arm; 2. Fixed seat; 20. Upper cavity; 21. Lower cavity; 3. Locking tongue; 30. First through hole; 31. Groove; 32. Slide rail; 33. Pressure plate; 34. Pressure rod; 35. First spring; 36. Wedge block; 37. Moving block; 370. Inclined surface; 371. Horizontal surface; 372. Arc surface; 38. Second spring; 39. Second pressure sensor; 40. First motor; 41. Rotating shaft; 410. Locking hole; 42. Gear; 43. Rack; 44. Conductive plate; 45. Upper plate; 46. Positive contact; 47. Negative contact; 48. First pressure sensor; 50. Electric push rod; 51. Locking column; 6. Lifting column; 60. Limiting ring; 61. Sleeve; 62. Roller; 63. Third spring; 7. Container; 70. Lock head; 700. Lock cavity; 701. Groove; 702. Second through hole; 80. Strip seat; 800. Slide groove; 81. Lead screw; 82. Second motor; 83. Slider; 9. Laser rangefinder. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0035] This invention provides a technical solution:

[0036] Please refer to a bridge crane control system simulation training system. Figures 1-11 The system includes a spreader, a container 7, and a lock 70 located on the top of the container 7. Specifically, the lock 70 is fixedly installed at the four top corners of the container 7. The spreader includes a main beam 10 and support arms 11 located at both ends of the main beam that can move relative to the main beam. That is, the support arms 11 can move along the length of the main beam 10 to adjust the distance between the two support arms 11 to adapt to the length of the container 7. There are many existing documents that disclose this movement and adjustment structure of the main beam 10 and the support arms 11, so it will not be described in detail here.

[0037] Please see Figures 5-6 At the bottom of both ends of the support arm 11, there are locking tongues 3 for locking with the top lock head 70 of the container. The lock head 70 has a lock cavity 700. The top of the lock head 70 has a slot 701 that communicates with the lock cavity 700. The locking tongue 3 extends into the lock cavity 700 from the slot 701 and rotates 90 degrees to lock with the lock head. The length of the slot 701 is slightly greater than the length of the locking tongue 3, and the width of the slot 701 is slightly greater than the width of the locking tongue 3. After the locking tongue 3 extends into the lock cavity 700 from the slot 701 and rotates 90 degrees, the locking tongue 3 is then raised upward so that the locking tongue 3 abuts against the top of the inner wall of the lock cavity 700. Continuing to raise the locking tongue 3 upward can lift the lock head 70 together with the container 7.

[0038] Since the operator controls the gantry crane from the cab, it is difficult to distinguish between single and double containers. To prevent the spreader from lifting two containers 7 at the same time, detection components are installed at the bottom of the boom 11 and the center of the bottom of the main beam 10. The detection components include a laser rangefinder 9, a drive component that moves the laser rangefinder 9 along the length of the main beam, and an alarm connected to the controller. The alarm can be installed in the cab for easy warning to the operator. The laser rangefinder 9 is used to scan the top area of ​​the container to determine whether there is a gap at the top of the container. When the laser rangefinder 9 detects a gap at the top of the container, it indicates that it is a gap connecting two containers, meaning that the spreader is lifting two containers across the same area at the same time. The controller then activates the alarm.

[0039] Specifically, both the laser rangefinder 9 and the alarm are electrically connected to the controller. When the spreader descends to the container position, the locking tongue 3 engages with the locking head 70. At this time, the spreader is not lifted. The laser rangefinder 9 detects whether the container being clamped by the spreader is a double container. The drive assembly moves the laser rangefinder 9. When the distance detected by the laser rangefinder 9 is greater than the set value, it indicates that the spreader is clamping two containers. At this time, the laser rangefinder 9 transmits a signal to the controller, and the controller activates the alarm to alert the operator. If the distance detected by the laser rangefinder 9 is less than or equal to the set value, it indicates that the spreader is clamping one container, and the spreader can be lifted. Figure 3 and Figure 4 The diagram shows the state of the spreader when it is lifting two containers.

[0040] Please see Figure 8 The aforementioned drive assembly includes a strip seat 80, a lead screw 81, and a second motor 82. A groove 800 is provided at the bottom of the strip seat 80, and a slider 83 is slidably connected within the groove 800. The lead screw 81 is rotatably connected within the groove 800 and is positioned along the length of the strip seat 80. The slider 83 is threadedly connected to the lead screw 81. The second motor 82 drives the lead screw 81 to rotate. The second motor 82 is bolted to one side of the strip seat 80, and the output shaft of the second motor 82 is coaxially connected to one end of the lead screw 81. A laser rangefinder 9 is installed at the bottom of the slider 83. Specifically, the strip seat 80 is installed at the bottom of the support arm 11 and the center of the bottom of the main beam 10, allowing the laser rangefinder 9 to detect multiple positions.

[0041] Please see Figure 6 Both ends of the support arm 11 are fixedly installed with a fixed seat 2. The fixed seat 2 has an upper cavity 20 and a lower cavity 21 arranged from top to bottom. The first motor 40 is installed in the upper cavity 20. The outer wall of the fixed seat 2 can be opened with a vent hole communicating with the inside of the upper cavity 20 to facilitate heat dissipation in the upper cavity 20. The lower cavity 21 is rotatably connected with a rotating shaft 41. The rotating shaft 41 is set vertically. The bottom end of the rotating shaft 41 extends downward out of the lower cavity 21 and is fixedly connected to the top of the locking tongue 3. The top end of the rotating shaft 41 extends upward into the upper cavity 20 and is coaxially connected to the output shaft of the first motor 40.

[0042] In use, when it is necessary to lock the bolt 3 and the lock head 70, the lifting device is used to move the lifting device downward so that the bolt 3 extends into the locking cavity 700 of the lock head 70. Then, the first motor 40 is started to drive the rotating shaft 41 to rotate 90 degrees (e.g., Figure 6 (As shown in the diagram), the bolt 3 and the lock head 70 can be locked; when it is necessary to unlock the bolt 3 and the lock head 70, in the following state... Figure 6 In the indicated state, the first motor 40 is started to drive the rotating shaft 41 to rotate another 90 degrees. At this time, the locking tongue 3 and the locking head 70 are unlocked. The lifting device is used to move the lifting device upward, so that the locking tongue 3 can be moved out of the locking cavity 700.

[0043] Please see Figures 6-7 A positive contact 46, a negative contact 47, and a first pressure sensor 48 are installed on one side of the inner wall of the lower cavity 21. A meshing gear 42 and a rack 43 are provided inside the lower cavity 21. The rack 43 is horizontally positioned, and the gear 42 is fixedly connected to the rotating shaft 41. The rack 43 is slidably connected to the inner wall of the lower cavity 21. Specifically, a horizontally positioned bar rail is fixed to the inner wall of the lower cavity 21. The side of the rack 43 facing away from the toothed portion is located in a groove of the bar rail that is adapted to slide along the bar rail. The rack 43 slides along the bar rail. The rack 43 is close to the positive contact... A conductive plate 44 is fixedly connected to one end of the head 46, and an upper plate 45 is fixed to the top of the conductive plate 44. When the conductive plate 44 moves to the position of the positive contact 46, the first pressure sensor 48 is energized when the conductive plate 44 simultaneously contacts the positive contact 46 and the negative contact 47. At this time, the upper plate 45 contacts the first pressure sensor 48. When the first pressure sensor 48 detects a pressure value, the controller controls the laser rangefinder 9 to work. When the first pressure sensor 48 does not detect a pressure value, the controller controls the laser rangefinder 9 to stop working.

[0044] When the bolt 3 extends into the lock head, the first motor 40 is activated, driving the shaft and bolt 3 to rotate 90 degrees, thus locking the bolt 3 into the lock head 70. As the shaft rotates, it drives the gear 42 to rotate. Since the gear 42 and rack 43 mesh, the rack 43 moves. After rotating 90 degrees, the rack 43 moves so that the conductive plate 44 simultaneously contacts the positive contact 46 and the negative contact 47, and the upper plate 45 contacts the first pressure sensor 48. The contact of the conductive plate 44 with the positive and negative contacts 47 forms an electrical circuit, at which point the first pressure sensor 48 is energized. Before this, the first pressure sensor 48 was not energized and did not consume power. When the upper plate 45 contacts the first pressure sensor 48, the first pressure sensor 48 detects a pressure value and transmits a signal to the controller, which then controls the laser rangefinder 9 to operate. When the first pressure sensor 48 does not detect a pressure value, the laser rangefinder 9 does not operate, preventing prolonged operation from affecting its service life.

[0045] In addition, when the first motor 40 is started, it drives the rotating shaft and the locking tongue 3 to rotate 90 degrees in the opposite direction, and the locking tongue 3 unlocks the lock head 70. At this time, the gear 42 rotates and drives the rack 43 to move in the opposite direction, so that the conductive plate 44 moves away from the positive contact 46 and the negative contact 47, and the upper plate 45 moves away from the first pressure sensor 48. At this time, the laser rangefinder 9 stops working and does not consume power.

[0046] It should be added that when the bolt 3 extends into the lock head 70 and needs to lock with the lock head 70, the first motor 40 controls the rotating shaft 41 to rotate 90 degrees counterclockwise; when the bolt 3 unlocks from the lock head 70, the first motor 40 controls the rotating shaft 41 to rotate 90 degrees clockwise.

[0047] Please see Figures 10-11 The latch 3 has a receiving cavity inside, and a moving block 37 is slidably arranged inside the receiving cavity. A slide rail 32 is fixedly connected to the bottom of the inner wall of the receiving cavity. The slide rail 32 is arranged along the length direction of the latch 3. The bottom of the moving block 37 is opened in a slide rail groove that matches the slide rail 32. The moving block 37 slides along the slide rail 32. The upper surface of the moving block 37 includes an inclined surface 370, a horizontal surface 371, and an arc surface 372. The horizontal surface 371 is located in the middle, and the inclined surface 370 and the arc surface 372 are located on both sides of the horizontal surface 371. It also includes a wedge block 36 that wedges into the inclined surface 370, and a pressure rod 34. The bottom end of the pressure rod 34 is fixedly connected to the top of the wedge block 36. The top end of the pressure rod 34 extends to the outside of the receiving cavity and is fixedly connected to a pressure plate 33. The width of the pressure plate 33 is equal to the width of the latch 3, and the length of the pressure plate 33 is greater than the width of the groove 701.

[0048] When the locking tongue 3 is locked with the locking head 70, during the lifting of the hoist, the locking tongue 3 moves upward to make the pressure plate 33 abut against the top of the inner wall of the locking cavity 700. As the locking tongue 3 continues to move upward, it will cause the pressure plate 33 to press down on the pressure rod 34, causing the wedge block 36 to move downward. Since the wedge block 36 is wedged with the inclined surface 370, it can drive the moving block 37 to move horizontally.

[0049] It also includes a lifting column 6, with a roller 62 rotatably mounted at the bottom of the lifting column 6. The roller 62 is placed on the arc surface 372, and the top of the lifting column 6 extends out of the receiving cavity. Specifically, the top of the latch 3 has a first through hole 30 communicating with the receiving cavity, and the top of the lifting column 6 passes through the first through hole 30. The top of the lock head 70 has a second through hole 702 communicating with the lock cavity. When the latch 3 is locked with the lock head, the first through hole 30 is located directly below the second through hole 702, and the diameter of the second through hole 702 is slightly larger than the diameter of the first through hole 30. When the latch 3 is locked with the lock head, the latch 3 is raised, and the pressure plate 33 will abut against the top of the inner wall of the receiving cavity, pushing the wedge block 36 to move down. The wedge block 36 drives the moving block to slide, causing the lifting column 6 to rise and insert into the second through hole 702.

[0050] Specifically, a first spring 35 is sleeved on the pressure rod 34. The top end of the first spring 35 is fixedly connected to the top of the inner wall of the accommodating cavity, and the bottom end of the first spring 35 is fixedly connected to the top of the wedge block 36. A second spring 38 is also included, which is horizontally arranged. One end of the second spring 38 is fixedly connected to the moving block 37, and the other end of the second spring 38 is fixedly connected to the inner wall of the accommodating cavity. A limit ring 60 is fixedly fixed at the lower part of the lifting column 6, and a sleeve 61 is sleeved on the upper part of the lifting column 6. The sleeve 61 is fixedly connected to the top of the inner wall of the accommodating cavity, and the diameter of the sleeve 61 is aligned with the diameter of the first through hole 30. A third spring 63 is sleeved in the middle of the lifting column 6. The top and bottom ends of the third spring 63 are fixedly connected to the sleeve 61 and the limit ring 60, respectively.

[0051] When the latch 3 is engaged with the lock head 70, during the lifting of the hoist, the latch 3 moves upward, first causing the pressure plate 33 to abut against the top of the inner wall of the lock cavity 700. As the latch 3 continues to move upward, it causes the pressure plate 33 to press down on the pressure rod 34, causing the wedge block 36 to move downward. The downward movement of the wedge block 36 stretches the first spring 35. Since the wedge block 36 is engaged with the inclined surface 370, it can drive the moving block 37 to move horizontally. The movement of the moving block 37 compresses the second spring 38. When the moving block 37 moves horizontally, the roller 62 rolls along the arc surface 372. When the latch 3 moves upward, causing the top of the latch 3 to contact the top of the lock cavity 700... When the top of the inner wall of the container 0 comes into contact with the container, the pressure plate 33 stops moving downwards, and the roller 62 moves from the arc surface 372 to the horizontal surface 371. The third spring 63 is compressed. During this process, the lifting column 6 is always in an upward state. When the roller 62 moves from the arc surface 372 to the horizontal surface 371, the top of the lifting column 6 just extends into the second through hole 702. At this time, when the container is lifted, the locking tongue 3 will not slide a large distance in the locking cavity 700 of the lock head 70, thus avoiding large-distance shaking of the container when the lifting device is moved, resulting in better stability.

[0052] When the spreader lowers the container and continues to move the locking tongue 3 downward, the first spring 35 will pull the wedge block 36 upward. The upward movement of the wedge block 36 will cause the second spring 38 to push the moving block 37 to move horizontally in the direction of the wedge block 36, so that the roller 62 can roll from the horizontal surface 371 into the arc surface 372. With the help of the third spring 63, the top of the lifting column 6 can be moved downward out of the second through hole 702.

[0053] An electric push rod 50 is installed on one side of the inner wall of the lower cavity 21. The extended end of the electric push rod 50 is connected to a locking pin 51. A locking hole 410 is opened on the rotating shaft 41. When the locking tongue 3 is locked with the lock head, the locking hole 410 on the rotating shaft 41 is aligned with the locking pin 51. At this time, the electric push rod 50 pushes the locking pin 51 to insert into the locking hole 410 to lock the rotating shaft 41 and prevent it from rotating. Locking the rotating shaft can prevent the container from falling due to the rotating shaft rotating due to a malfunction or operator misoperation (including but not limited to operator misoperation of the motor). This improves the safety of container operation.

[0054] The top of the latch 3 is provided with a groove 31 located below the pressure plate 33. A second pressure sensor 39 is installed in the groove 31. When the conductive plate 44 simultaneously abuts against the positive contact 46 and the negative contact 47, the second pressure sensor 39 is energized. When the pressure plate 33 moves down and abuts against the second pressure sensor 39, the upper surface of the pressure plate 33 is at the same height as the top of the latch 3. When the pressure plate 33 moves down and abuts against the second pressure sensor 39, causing the second pressure sensor 39 to detect a pressure value, the controller controls the electric push rod 50 to push the lock pin 51 into the lock hole 410. When the second pressure sensor 39 does not detect a pressure value, the controller controls the electric push rod 50 to pull the lock pin 51 out of the lock hole 410.

[0055] It should be added that the second pressure sensor 39 and the electric push rod 50 are both electrically connected to the controller. When the second pressure sensor 39 detects a pressure value, it transmits a signal to the controller, which then controls the electric push rod 50 to push the locking pin 51 into the lock hole 410.

[0056] This invention includes a power supply, which can be installed inside the lower cavity 21. The power supply, the second pressure sensor 39, the first pressure sensor 48, the positive contact 46, and the negative contact 47 are connected in series via wires. The positive contact 46 and the negative contact 47 do not contact each other. When the conductive plate 44 moves and comes into contact with the positive contact 46 and the negative contact 47, a power-conducting circuit is formed. At this time, the second pressure sensor 39 and the first pressure sensor 48 are energized and work. Before the conductive plate 44 moves and comes into contact with the positive contact 46 and the negative contact 47 to form a power-conducting circuit, the second pressure sensor 39 and the first pressure sensor 48 are not working, which can save energy and also prevent the second pressure sensor 39 and the first pressure sensor 48 from working for a long time, thus affecting their service life.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge crane control system simulation training system, comprising a spreader, a container (7) and a lock head (70) arranged on the top of the container (7); the spreader comprises a main beam (10) and a branch arm (11) arranged at both ends of the main beam and capable of displacement relative to the main beam, and a lock tongue (3) is arranged at the bottom of both ends of the branch arm (11) to lock with the lock head on the top of the container, characterized in that, Both the support arm (11) and the main beam (10) are equipped with detection components at their bottom centers. The detection components include a laser rangefinder (9), a drive component that drives the laser rangefinder (9) to move along the length of the main beam, and an alarm connected to the controller. The laser rangefinder (9) is used to scan the top area of ​​the container to determine whether there is a gap on the top of the container. When the laser rangefinder (9) detects that there is a gap on the top of the container, the controller controls the alarm to sound an alarm. The lock head (70) has a lock cavity (700) inside, and a slot (701) communicating with the lock cavity is provided inside the lock head (701). The lock tongue (3) extends into the lock cavity (700) from the slot (701) and rotates 90 degrees to lock with the lock head. The lock tongue (3) has a receiving cavity inside, and a moving block (37) is slidably provided in the receiving cavity. The upper surface of the moving block (37) includes an inclined surface (370), a horizontal surface (371), and an arc surface (372). The horizontal surface (371) is located in the middle, and the inclined surface (370) and the arc surface (372) are located on both sides of the horizontal surface (371). It also includes a wedge block (36) wedged with the inclined surface (370), and a pressure rod (34). The bottom end of the lock is fixedly connected to the wedge block (36), and the top end of the pressure rod (34) extends to the outside of the accommodating cavity and is fixedly connected to the pressure plate (33); it also includes a lifting column (6), the bottom end of the lifting column (6) is rotatably mounted with a roller (62), the roller (62) is placed on the arc surface (372), the top end of the lifting column (6) passes through the accommodating cavity, and the top of the lock head (70) is provided with a second through hole (702) communicating with the lock cavity; when the lock tongue (3) is locked with the lock head, the lock tongue (3) is raised, the pressure plate (33) will abut against the top of the inner wall of the accommodating cavity and push the wedge block (36) to move down, the wedge block (36) drives the moving block to slide, and drives the lifting column (6) to rise and insert into the second through hole (702). 2.The bridge crane control system simulation training system of claim 1, wherein: The drive assembly includes a strip seat (80), a lead screw (81), and a second motor (82). The bottom of the strip seat (80) is provided with a groove (800). A slider (83) is slidably connected in the groove (800). The lead screw (81) is rotatably connected in the groove (800). The slider (83) is threadedly connected to the lead screw (81). The second motor (82) drives the lead screw (81) to rotate. The laser rangefinder (9) is installed at the bottom of the slider (83). 3.The bridge crane control system simulation training system of claim 1, wherein: Both ends of the support arm (11) are equipped with fixed seats (2). The fixed seats (2) are provided with an upper cavity (20) and a lower cavity (21) from top to bottom. The upper cavity (20) is equipped with a first motor (40). The lower cavity (21) is rotatably connected with a rotating shaft (41). The bottom end of the rotating shaft (41) extends downward into the lower cavity (21) and is fixedly connected to the locking tongue (3). The top end of the rotating shaft (41) extends upward into the upper cavity (20) and is coaxially connected to the output shaft of the first motor (40).

4. The bridge crane control system simulation training system of claim 3, wherein: An electric push rod (50) is installed on one side of the inner wall of the lower cavity (21). The extended end of the electric push rod (50) is connected to a locking pin (51). A lock hole (410) is provided on the rotating shaft (41). When the lock tongue (3) is locked with the lock head, the lock hole (410) is aligned with the locking pin (51). The electric push rod (50) pushes the locking pin (51) to insert into the lock hole (410) to lock the rotating shaft (41) and prevent it from rotating.

5. The bridge crane control system simulation training system of claim 4, wherein: A positive contact (46), a negative contact (47), and a first pressure sensor (48) are installed on one side of the inner wall of the lower cavity (21). A gear (42) and a rack (43) mesh with each other inside the lower cavity (21). The gear (42) is fixedly connected to the rotating shaft (41), and the rack (43) is slidably connected to the inner wall of the lower cavity (21). A conductive plate (44) is fixedly connected to one end of the rack (43) near the positive contact (46). An upper plate (45) is fixed to the top of the conductive plate (44). When the conductive plate (44) moves to the position of the positive contact (46), the first pressure sensor (48) is energized when the conductive plate (44) simultaneously contacts the positive contact (46) and the negative contact (47). At this time, the upper plate (45) contacts the first pressure sensor (48). When the first pressure sensor (48) detects the pressure value, the controller controls the laser rangefinder (9) to work. When the first pressure sensor (48) does not detect the pressure value, the controller controls the laser rangefinder (9) to stop working.

6. The bridge crane control system simulation training system according to claim 5, characterized in that: The top of the latch (3) is located below the pressure plate (33) and a second pressure sensor (39) is installed. When the conductive plate (44) simultaneously contacts the positive contact (46) and the negative contact (47), the second pressure sensor (39) is energized. When the pressure plate (33) moves down and contacts the second pressure sensor (39) so that the second pressure sensor (39) detects a pressure value, the controller controls the electric push rod (50) to push the lock pin (51) into the lock hole (410). When the second pressure sensor (39) does not detect a pressure value, the controller controls the electric push rod (50) to pull the lock pin (51) out of the lock hole (410).

7. The bridge crane control system simulation training system according to claim 1, characterized in that: The pressure rod (34) is fitted with a first spring (35), the top end of the first spring (35) is fixedly connected to the top of the inner wall of the accommodating cavity, the bottom end of the first spring (35) is fixedly connected to the wedge block (36), and also includes a horizontally arranged second spring (38), one end of the second spring (38) is fixedly connected to the moving block (37), the other end of the second spring (38) is fixedly connected to the inner side wall of the accommodating cavity, the lower part of the lifting column (6) is fixed with a limit ring (60), the upper part of the lifting column (6) is fitted with a sleeve (61), the sleeve (61) is fixedly connected to the top of the inner wall of the accommodating cavity, the middle part of the lifting column (6) is fitted with a third spring (63), the top end and the bottom end of the third spring (63) are fixedly connected to the sleeve (61) and the limit ring (60) respectively.

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