Crane anti-collision early warning device

Abstract

A crane anti-collision early warning device is provided to solve the problem of poor anti-collision effect of the crane, and comprises a lifting tool and a collision block. A protection device is installed at the lower end of a trolley. The protection device comprises a support plate, which is fixedly connected with the trolley. A buffer block is arranged at the middle position of the support plate. The buffer block corresponds to the collision block in an up-down manner. A plurality of guide rods are fixedly arranged on the buffer block. The guide rods slide up and down in the support plate. A spring is sleeved on the guide rod. The spring is located between the support plate and the buffer block. Supports are fixedly arranged at the left and right ends of the support plate. A rotating shaft is arranged in the support. A disc is coaxially fixedly arranged on the rotating shaft. A swing rod is fixedly arranged on the disc. The swing rod faces the buffer block. A roller is rotatably connected to the end of the swing rod. The roller can contact the collision block. A first switch is arranged in the left support. A first boss corresponding to the first switch is fixedly arranged on the left disc. A second switch is arranged in the right support. A second boss corresponding to the second switch is fixedly arranged on the right disc.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, and in particular relates to a crane anti-collision early warning device. Background Technology

[0002] Cranes, as core equipment for modern industrial material handling, are widely used in workshops, warehouses, docks, and other places. In dense working environments, especially when multiple cranes are working together or in situations with limited space, detection units are installed above the crane to detect the lifting equipment in order to ensure the safety of crane use and prevent accidents caused by the lifting equipment moving upwards. However, existing detection units generally use a single limit switch for detection, which has a small detection stroke. In addition, direct detection can easily damage the limit switch, affecting the stability during use. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a crane anti-collision warning device to solve the problem of poor anti-collision effect of cranes.

[0004] The technical solution to the technical problem is as follows: including a main beam, outriggers, trolley traveling mechanism, cab, crane trolley, drum, wire rope and lifting gear. A top block is fixed at the upper end of the lifting gear. A protective device corresponding to the top block is installed at the lower end of the crane trolley. The protective device includes a support plate, which is fixedly connected to the crane trolley. A buffer block is provided in the middle of the support plate, which corresponds to the top block. Multiple guide rods are evenly fixed at the upper end of the buffer block. The guide rods slide up and down inside the support plate. Springs are sleeved on the guide rods, and the springs are located between the support plate and the buffer block. The support plate has brackets fixed at both ends. A rotating shaft with a front-to-back orientation is rotatably connected inside the brackets. A disc is fixed coaxially to the rotating shaft. A horizontal swing arm is fixed on the disc, facing the buffer block. A roller is rotatably connected to the end of the swing arm, and the roller can contact the impact block. A first switch is installed in the bracket on the left side. A first boss corresponding to the first switch is fixed on the disc on the left side. When the swing arm on the left side swings upward, the first boss presses against the first switch to open it. A second switch is installed in the bracket on the right side. A second boss corresponding to the second switch is fixed on the disc on the right side. When the swing arm on the right side swings upward, the second boss presses against the second switch to open it.

[0005] Preferably, the bracket is equipped with a spring box corresponding to the rotating shaft.

[0006] Preferably, a PLC controller is installed on the left side of the support plate. The first switch controls the PLC controller, which controls the operation of the drum and the wire rope. When the PLC controller is turned on, the drum cannot drive the wire rope to move upward.

[0007] Preferably, multiple alarms are installed on the right side of the support plate, and the second switch controls the multiple alarms.

[0008] This invention has the following advantages over traditional equipment: simple operation; when the top block moves upward, it drives the swing arms on the left and right sides to move; under the action of the first and second protrusions, the first and second switches are turned on simultaneously, the PLC controller is turned on, the drum and wire rope cannot move upward, the alarm sounds and provides early warning, and the protection effect is good; at the same time, combined with the buffer structure, it avoids the top block from impacting the lifting trolley, making it safe and stable; the mechanical structure has low cost, is economical and practical, and has high reliability. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the front view of this utility model; Figure 2 This is a schematic diagram of the main view of the protective device in this utility model; Figure 3 This is a schematic diagram of the three-dimensional structure of the protective device in this utility model.

[0010] Reference numerals in the attached drawings: 1. Main beam; 2. Lifting trolley; 3. Drum; 4. Wire rope; 5. Lifting device; 6. Top block; 7. Protective device; 8. Support plate; 9. Buffer block; 10. Guide rod; 11. Spring; 12. Bracket; 13. Rotating shaft; 14. Disc; 15. Swing rod; 16. Roller; 17. First switch; 18. First boss; 19. Second switch; 20. Second boss; 21. Clockwork box; 22. PLC controller; 23. Alarm. Detailed Implementation

[0011] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0012] Depend on Figures 1 to 3 A crane anti-collision warning device is provided, comprising a main beam 1, outriggers, a trolley traveling mechanism, a cab, a crane trolley 2, a drum 3, a wire rope 4, and a lifting device 5. A top block 6 is fixed to the upper end of the lifting device 5. A protective device 7 corresponding to the top block 6 is installed at the lower end of the crane trolley 2. The protective device 7 includes a support plate 8, which is fixedly connected to the crane trolley 2. A buffer block 9 is provided in the middle of the support plate 8, which corresponds to the top block 6. A plurality of guide rods 10 are evenly fixed to the upper end of the buffer block 9. The guide rods 10 slide up and down within the support plate 8. A spring 11 is sleeved on the guide rod 10, and the spring 11 is located between the support plate 8 and the buffer block 9. Support plates 8 are fixed with brackets 12 at both ends. A rotating shaft 13 with a front-to-back orientation is rotatably connected inside the brackets 12. A disc 14 is coaxially fixed to the rotating shaft 13. A horizontal swing rod 15 is fixed on the disc 14, facing the buffer block 9. A roller 16 is rotatably connected to the end of the swing rod 15, and the roller 16 can contact the impact block 6. A first switch 17 is installed inside the bracket 12 on the left side. A first boss 18 corresponding to the first switch 17 is fixed on the disc 14 on the left side. When the swing rod 15 on the left side swings upward, the first boss 18 presses the first switch 17 to open. A second switch 19 is installed inside the bracket 12 on the right side. A second boss 20 corresponding to the second switch 19 is fixed on the disc 14 on the right side. When the swing rod 15 on the right side swings upward, the second boss 20 presses the second switch 19 to open.

[0013] To ensure that the swing arm 15 can be successfully reset, a spring box 21 corresponding to the rotating shaft 13 is installed on the bracket 12.

[0014] A PLC controller 22 is installed on the left side of the support plate 8. The first switch 17 controls the PLC controller 22, which controls the operation of the drum 3 and the wire rope 4. When the PLC controller 22 is turned on, the drum 3 cannot drive the wire rope 4 to move upward.

[0015] Multiple alarms 23 are installed on the right side of the support plate 8, and the second switch 19 controls the multiple alarms 23.

[0016] When this utility model is in use, when the drum 3 drives the wire rope 4 and the lifting device 5 to move upward, the lifting device 5 drives the top block 6 to move upward. The top block 6 runs into the protective device 7, and the roller 16 first rolls and connects with the top block 6. The top block 6 is an isosceles trapezoid. The top block 6 drives the left and right swing arms 15 to swing upward synchronously. The left swing arm 15 drives the left disc 14 to rotate. The left disc 14 drives the first boss 18 to rotate towards the first switch 17. The first boss 18 presses the first switch 17, the first switch 17 is opened, and the PLC controller 22 starts to run. At this time, the drum 3 is closed, and the drum 3 cannot drive the wire rope 4 to move upward. The switch controlling the upward movement of the wire rope 4 is ineffective, while the switch controlling the downward movement of the wire rope 4 can continue to be used. At the same time, the right-side lever 15 drives the right-side disc 14 to rotate, and the right-side disc 14 drives the second protrusion 20 to rotate toward the second switch 19. The second protrusion 20 presses the second switch 19, the second switch 19 is opened, and multiple alarms 23 start to warn. At this time, the spring box 21 is in a compressed state. Since the wire rope 4 suddenly stops running, the lifting device 5 will continue to move upward due to inertia. The top block 6 presses the buffer block 9. The buffer block 9 is made of rubber and has a good protective effect. The buffer block 9 drives multiple guide rods 10 to move upward in the support plate 8. The spring 11 is in a compressed state, which can effectively reduce the upward impact force generated by the top block 6 due to inertia and has a good anti-collision effect. Since the first protrusion 18 and the second protrusion 20 are both annular blocks, the range of action is wide, which can ensure the continuous contact effect between the first protrusion 18 and the first switch 17, the second protrusion 20 and the second switch 19, and ensure that the first switch 17 and the second switch 19 are always in the open state during the upward movement of the top block 6 due to inertia. When the lifting device 5 needs to move downwards, press the switch for the wire rope 4 to move downwards. The drum 3 reverses, and the wire rope 4 drives the lifting device 5 and the top block 6 to move downwards. The top block 6 moves downwards away from the buffer block 9, the spring 11 resets, the buffer block 9 and the guide rod 10 reset, the roller 16 disengages from the top block 6, and under the action of the spring box 21, the disc 14 and the swing rod 15 reset. The first boss 18 disengages from the first switch 17, and the first switch 17 is in the closed state. The switch controlling the upward movement of the wire rope 4 can be used normally. The second boss 20 moves away from the second switch 19, and the second switch 19 is in the closed state. Multiple alarms 23 are in the closed state. The operation is flexible, the reset effect is good, and it is safe and reliable.

[0017] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A crane anti-collision warning device, comprising a main beam (1), outriggers, a trolley traveling mechanism, a cab, a crane trolley (2), a drum (3), a wire rope (4), and a lifting device (5), characterized in that, The upper end of the lifting device (5) is fixed with a top block (6), and the lower end of the lifting trolley (2) is equipped with a protective device (7) corresponding to the top block (6). The protective device (7) includes a support plate (8), which is fixedly connected to the lifting trolley (2). A buffer block (9) is provided in the middle of the support plate (8), which corresponds to the top block (6). Multiple guide rods (10) are evenly fixed on the upper end of the buffer block (9). The guide rods (10) slide up and down in the support plate (8). A spring (11) is sleeved on the guide rod (10), and the spring (11) is located between the support plate (8) and the buffer block (9). The support plate (8) has brackets (12) fixed at both ends. A rotating shaft (13) with a front-to-back direction is rotatably connected inside the bracket (12). A disc (14) is fixed coaxially to the rotating shaft (13). A horizontal swing rod (15) is fixed on the disc (14). The swing rod (15) faces the buffer block (9). A roller (16) is rotatably connected to the end of the swing rod (15). The roller (16) can contact the top block (6). A first switch (17) is installed inside the bracket (12) on the left side. A first boss (18) corresponding to the first switch (17) is fixed on the disc (14) on the left side. A second switch (19) is installed inside the bracket (12) on the right side. A second boss (20) corresponding to the second switch (19) is fixed on the disc (14) on the right side.

2. The crane anti-collision early warning device according to claim 1, characterized in that, The bracket (12) is equipped with a spring box (21) corresponding to the rotating shaft (13).

3. The crane anti-collision early warning device according to claim 1, characterized in that, A PLC controller (22) is installed on the left side of the support plate (8). The first switch (17) controls the PLC controller (22). The PLC controller (22) controls the operation of the drum (3) and the wire rope (4). When the PLC controller (22) is turned on, the drum (3) cannot drive the wire rope (4) to move upward.

4. A crane anti-collision early warning device according to claim 1, characterized in that, Multiple alarms (23) are installed on the right side of the support plate (8), and the second switch (19) controls the multiple alarms (23).

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