A warning device for tower cranes

Abstract

This invention relates to an early warning device for tower cranes, specifically within the technical field of tower crane equipment. The device includes a wire rope and a steel structure block located at the lower end of the wire rope. The steel structure block has an assembly groove and a pre-control device. The pre-control device includes an assembly circular protrusion fixedly mounted on the lower side of the steel structure block, with a rope hook fixedly installed at the lower end of the assembly circular protrusion. Both the rope hook and the steel structure block are equipped with a pre-locking mechanism. This invention provides real-time early warning and protection during the lifting of goods by the tower crane. When goods are at risk of detachment or falling due to external influences, timely safety control is implemented to prevent sudden falls, further reducing safety hazards.

Description

Technical Field

[0001] This application relates to the technical field of tower crane equipment, and in particular to an early warning device for tower cranes. Background Technology

[0002] Tower cranes are common lifting equipment with a large working range, mainly used for the vertical transportation of materials and the installation of components in multi-story and high-rise building construction. The main structure of a tower crane is typically made of steel and consists of a tower structure, a slewing mechanism, a hoisting mechanism, a luffing mechanism, and a counterweight. The hoisting mechanism uses a winch and wire ropes to vertically lift and lower goods. The tower crane hook, as the carrier of the goods being transported, plays a crucial role in the lifting operation. During the lifting process, swaying often occurs due to wind in the air and improper operation by workers, resulting in the goods slipping off the hook, posing a certain safety hazard. Currently, goods are usually suspended from the hook by ropes without other warning and protective devices. Swaying during lifting and insecure rope fixation can easily lead to goods slipping off the hook.

[0003] For example, in the existing Chinese patent with publication number CN116443722A, a tower crane deformation monitoring device and monitoring method are disclosed. It includes a tower crane for hoisting profiles. A rotating assembly is installed on the lower surface of the tower crane to drive it to rotate at a constant speed to transport the profiles. The rotating assembly includes a rotating motor and a connecting block for connection and support. A tower base for supporting the tower crane is installed on the lower surface of the rotating assembly. A hoisting steel rope is provided on the surface of the tower crane. Buffer mechanisms are provided on both outer surfaces of the tower crane. Limit mechanisms are provided on the outer surface of the hoisting steel rope. An alarm mechanism is provided on the outer surface of the tower crane. The aforementioned existing technology, with its set limiting mechanism, can guide and limit the operation of the hoisting steel rope and provide early warning when it sways. During the adjustment process, the hoisting steel rope passes through the guide cylinder and is clamped and guided by the circular array of guide blocks to hoist the profile. Tension and compression sensors monitor the hoisting of the steel rope. Rubber rings bind the lower end of the guide blocks, which are in an open state due to the action of torsion springs. When the hoisting steel rope is impacted and sways, the rubber rings rub against the groove at the lower end of the guide blocks. When the impact force exceeds the limit value, the rubber rings break, the guide blocks expand and compress the compression spring, thereby triggering the sensing ring and stopping the tower crane from operating, thus preventing structural damage or accidents.

[0004] However, the aforementioned existing technologies have the following technical defects:

[0005] The aforementioned existing technology can monitor the lifting steel rope during cargo lifting. The lifting steel rope will sway when impacted. When the impact force exceeds a certain value, it triggers a sensing ring by compressing a spring, causing the crane to stop. However, the cargo being lifted by the steel rope will not stop swaying simply because the crane stops; on the contrary, the sudden stop will increase the swaying amplitude, further increasing the risk of cargo falling and raising safety hazards. Furthermore, when cargo sways during lifting, the aforementioned device can only issue an alarm to warn workers; it cannot provide timely and effective protective measures to prevent sudden cargo falls that could cause serious safety accidents and property damage when there is a risk of cargo falling.

[0006] Based on this, there is still room for improvement in the existing tower crane deformation monitoring device and method in order to overcome the aforementioned technical defects. Summary of the Invention

[0007] In order to provide real-time early warning and protection when tower cranes are lifting goods, and to promptly implement safety control to prevent sudden falls of goods when they are at risk of detachment or falling due to external influences, thereby further reducing safety hazards, this application provides an early warning device for tower cranes.

[0008] This application provides a warning device for tower cranes, which adopts the following technical solution:

[0009] A warning device for a tower crane includes a wire rope and a steel structure block disposed at the lower end of the wire rope. The steel structure block has an assembly groove and a pre-control device.

[0010] The pre-control device includes an assembly round protrusion fixedly installed on the lower side of the steel structure configuration block, a rope hook fixedly installed at the lower end of the assembly round protrusion, and a pre-locking mechanism provided on the rope hook and the steel structure configuration block.

[0011] Preferably, the pre-locking mechanism includes a T-shaped rod block, a safety buckle, and an anti-disengagement unit. The T-shaped rod block is fixedly mounted on the rope hook, and the two safety buckles are symmetrically rotated and installed on the T-shaped rod block. The anti-disengagement unit is located in the assembly groove of the rope hook and the steel structure configuration block.

[0012] Preferably, the anti-disengagement unit includes a hydraulic cylinder, an arc-shaped locking block, an inner connecting block, and a reaction component. The hydraulic cylinder is fixedly installed in the assembly groove of the steel structure configuration block, and its telescopic end extends downward through the steel structure configuration block and the assembly round protrusion toward the rope hook. The steel structure configuration block and the assembly round protrusion are both provided with round through holes that communicate with the assembly groove for the installation of the hydraulic cylinder. The arc-shaped locking block is fixedly installed on the telescopic end of the hydraulic cylinder through a middle connecting block. The rope hook is provided with a sliding port that communicates with the round through holes for the installation of the arc-shaped locking block.

[0013] One end of the inner connecting block is rotatably mounted on the end of the arc-shaped locking block facing the safety buckle, and the other end is hinged and limited to the two safety buckles by the central round rod. The two safety buckles are provided with arc-shaped grooves for the central round rod to slide. The reaction component is located on the rope hook.

[0014] Preferably, the reaction assembly includes an arc-shaped abutment, a lifting spring, a pressure sensor, and a lateral linkage. The arc-shaped abutment is symmetrically embedded and slidably mounted on the rope hook via an inner rectangular block. The rope hook has symmetrically formed arc-shaped grooves for mounting the arc-shaped abutment and rectangular inner grooves communicating with the arc-shaped grooves for mounting the inner rectangular block. The lifting spring is disposed in the rectangular inner groove, with one end fixedly connected to the bottom wall of the rectangular inner groove and the other end fixedly connected to the inner rectangular block. The inner rectangular block has an inner circular hole for the lifting spring to retract. The pressure sensor is mounted in the arc-shaped groove, and the lateral linkages are symmetrically disposed on both sides of the rope hook.

[0015] Preferably, the lateral linkage includes a rectangular side block, a dovetail brace, a lateral roller, a U-shaped end block, a push spring, and a monitor. The rectangular side block is symmetrically fixedly installed on both sides of the rope hook. The dovetail brace is slidably positioned on the rectangular side block. The rectangular side block has a dovetail vertical groove for mounting the dovetail brace. The lateral roller is rotatably positioned at the end of the dovetail brace away from the rectangular side block via an inner connecting rod. The U-shaped end block is fixedly engaged at the upper end of the rectangular side block. The push spring is located in the dovetail vertical groove of the rectangular side block, with one end fixedly connected to the rectangular side block and the other end fixedly connected to the lower end of the dovetail brace. The monitor is located on the inner connecting rod and the dovetail brace.

[0016] Preferably, the monitor includes a sensing support rod, an inner rotating cylinder, and an inner rectangular block. The sensing support rod is fixedly installed on a dovetail brace. One end of the inner rotating cylinder is rotatably mounted on the sensing support rod, and the other end extends into the inner connecting rod. The inner connecting rod has an inner circular groove for the inner rotating cylinder to be inserted into. One end of the inner rectangular block is fixedly installed in the inner circular groove, and the other end extends into the inner rotating cylinder. The inner rotating cylinder has an inner groove that matches the inner rectangular block.

[0017] Preferably, a warning light controlled by a sensing support rod and a pressure sensor is provided on the upper side of the steel structure block.

[0018] Preferably, the steel structure configuration block is fixedly covered with an outer panel on the assembly groove.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. First, the goods to be hoisted are tied to the rope hook with ropes. The safety buckle installed on the rope hook by the T-shaped bar block has an initial restraining effect on the rope tied to the goods, which can prevent the rope from easily detaching and falling. When the goods are hoisted, the rope will drive the arc-shaped abutment block and the side roller to slide down, so that the arc-shaped abutment block will contact the pressure sensor and operate. The side rollers located on both sides of the rope hook are always in contact with the rope tied to the goods under the action of the push spring, and the sensing support rod is operated.

[0021] 2. When one end of the rope binding the goods detaches from the goods, the goods fall and the rope rapidly passes through the rope hook. At this time, the pressure of the rope on the arc-shaped stop block changes. Under the action of the push spring, the arc-shaped stop block separates from the pressure sensor. The pressure sensor will quickly drive the hydraulic cylinder to operate, causing the arc-shaped locking block to quickly snap down and press against the passing rope, thereby locking the rope and preventing the goods from falling further. Simultaneously, under the linkage of the inner connecting block, the safety buckle will further tighten and limit the rope.

[0022] 3. During hoisting, if the operator rotates the goods too quickly or encounters strong winds at high altitudes, the goods may sway, causing instability and the rope to slip on the hook. In this case, the side rollers that are in contact with the rope will rotate. If the rotation time is too long, it indicates that the center of gravity of the goods is continuously shifting, causing the rope to continue to slide on the hook. At this time, the inner rectangular block will synchronously drive the inner rotating cylinder installed on the sensing support rod to rotate when the side rollers rotate. When the inner rotating cylinder rotates a large number of times, the sensing support rod will also quickly drive the hydraulic cylinder to operate, and the rope will be fastened through the arc-shaped locking block to prevent the center of gravity of the goods from continuously shifting and affecting the hoisting safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall invention.

[0024] Figure 2 This is a schematic diagram of the pre-control device and pre-locking mechanism of the present invention.

[0025] Figure 3 This is a schematic diagram of the anti-detachment hook unit and warning light of the present invention.

[0026] Figure 4 This is the present invention. Figure 3 Enlarged view of region A in the middle.

[0027] Figure 5 This is a schematic diagram of some components of the anti-detachment unit of the present invention.

[0028] Figure 6 This is a cross-sectional view of the rope hook and an installation diagram of some components of the anti-disengagement unit of the present invention.

[0029] Figure 7This is a schematic diagram of the reaction components of the present invention.

[0030] Figure 8 This is a cross-sectional view of the rope hook and an installation diagram of some components of the reaction assembly of the present invention.

[0031] Figure 9 This is a schematic diagram of the side linkage component of the present invention.

[0032] Figure 10 This is an exploded view of some components of the side linkage of the present invention.

[0033] Figure 11 This is a cross-sectional view of the monitor of the present invention.

[0034] Figure 12 This is an exploded view of some components of the monitor of the present invention.

[0035] Figure 13 This is an exploded cross-sectional view of the protective structure of the present invention.

[0036] Figure 14 These are cross-sectional views of the steel structure configuration block and schematic diagrams of the driving unit of the present invention.

[0037] Explanation of reference numerals in the attached drawings: 1. Wire rope; 11. Steel structure configuration block; 111. Assembly groove; 2. Pre-control device; 21. Assembly round protrusion; 22. Rope hook; 3. Pre-locking mechanism; 31. T-shaped bar block; 32. Safety buckle; 4. Anti-disengagement unit; 41. Hydraulic cylinder; 42. Arc-shaped locking block; 43. Inner connecting block; 5. Reaction component; 211. Round through hole; 44. Central connecting block; 221. Sliding opening; 45. Central round rod; 321. Arc-shaped sliding groove; 51. Arc-shaped abutment block; 52. Push spring; 53. Pressure sensor; 6. Side linkage component; 54. Inner rectangular block; 222. Embedded arc-shaped groove; 223. Rectangular inner groove; 541. Inner round hole; 61. 62. Rectangular side block; 63. Dovetail diagonal bar; 64. Side roller; 65. U-shaped end block; 7. Push spring; 8. Monitor; 9. Dovetail vertical groove; 10. Inner connecting round rod; 11. Sensing support rod; 12. Inner rotating cylinder; 13. Inner central rectangular block; 14. Inner round groove hole; 15. Inner groove; 16. Warning light; 17. Outer side plate; 18. Preventive protection mechanism; 19. Arc-shaped toothed rod; 10. Limiting end block; 11. Inner round rod; 12. Drive gear; 13. Drive unit; 14. Arc-shaped limiting strip; 15. Convex sliding mouth; 16. Dual-shaft motor; 17. Transmission round rod; 18. Bevel gear one; 19. Bevel gear two; 10. Motor base; 11. Stabilizing support plate. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1-14 This application will be described in further detail.

[0039] This application discloses an early warning device for tower cranes, which can provide real-time early warning and protection when tower cranes are lifting goods. When goods are at risk of detachment or falling due to external influences, timely safety control can be implemented to prevent the goods from falling suddenly, thereby further reducing safety hazards.

[0040] Example 1:

[0041] Reference Figure 1 and Figure 2 As shown, this application provides a warning device for a tower crane, including a wire rope 1 and a steel structure configuration block 11 located at the lower end of the wire rope 1. The other end of the wire rope 1 is connected to the hoisting mechanism of the tower crane. The steel structure configuration block 11 has an assembly groove 111 and a pre-control device 2. The pre-control device 2 includes an assembly round protrusion 21 fixedly installed on the lower side of the steel structure configuration block 11. A rope hook 22 is fixedly installed at the lower end of the assembly round protrusion 21. The rope hook 22 is fixedly installed on the lower side of the steel structure configuration block 11 through the assembly round protrusion 21, which can increase the working area between the rope hook 22 and the steel structure configuration block 11, so that the rope hook 22 can increase stability when lifting goods. The rope hook 22 and the steel structure configuration block 11 are provided with a pre-locking mechanism 3, which is used to fasten and lock the goods that sway abnormally during lifting, thereby improving the safety and anti-falling effect of the goods during the transfer process. The steel structure configuration block 11 is fixedly covered with an outer panel 12 on the assembly slot 111 to protect the relevant equipment installed in the assembly slot 111.

[0042] During hoisting, the goods to be transferred are first suspended on the rope hook 22 by ropes. The weight of the goods acts directly on the rope hook 22 through the ropes. The staff starts the tower crane and controls the rope hook 22 to hoist the goods through the wire rope 1. During the hoisting process, the pre-locking mechanism 3 can quickly lock and control the rope if the swaying amplitude is too large or if the rope is not properly tied to the goods and there is a risk of falling, further reducing the occurrence of falling.

[0043] Reference Figure 3 and Figure 4As shown, specifically, the pre-locking mechanism 3 includes a T-shaped rod block 31, safety buckles 32, and an anti-disengagement unit 4. The T-shaped rod block 31 is fixedly mounted on the rope hook 22, and the two safety buckles 32 are symmetrically rotated and installed on the T-shaped rod block 31. It should be noted that the length of the two safety buckles 32 is relatively long, so they cannot rotate outward from the lifting opening of the rope hook 22. When the goods are suspended on the rope hook 22 by the rope, the two safety buckles 32 can initially protect the rope from disengagement, preventing the goods from easily disengaging and falling when they sway in the air. The anti-disengagement unit 4 is located in the assembly groove 111 of the rope hook 22 and the steel structure configuration block 11, and is used to further improve the anti-disengagement performance during suspension in conjunction with the safety buckles 32. At the same time, it can firmly fasten and lock the rope in case of abnormal situations.

[0044] Reference Figure 5 and Figure 6 As shown, considering that during the lifting process of a tower crane, goods are easily affected by strong winds in the air and by excessively fast rotation and transfer by operators, causing the goods to sway and easily fall off the hook, in order to reduce this risk, the anti-disengagement unit 4 includes a hydraulic cylinder 41, an arc-shaped locking block 42, an inner connecting block 43, and a reaction component 5; the hydraulic cylinder 41 is fixedly installed in the assembly groove 111 of the steel structure configuration block 11, and its telescopic end extends downward through the steel structure configuration block 11 and the assembly round protrusion 21 toward the rope hook 22. Both the 1 and the assembly round protrusion 21 are provided with round through holes 211 that communicate with the assembly groove 111 for the installation of the hydraulic cylinder 41. The arc-shaped locking block 42 is fixed to the extension end of the hydraulic cylinder 41 by the middle connecting block 44. The rope hook 22 is provided with a sliding port 221 that communicates with the round through hole 211 for the installation of the arc-shaped locking block 42. When the hydraulic cylinder 41 is started, it can push the arc-shaped locking block 42 downward to press against the rope hanging on the rope hook 22. The powerful pushing force of the hydraulic cylinder 41 locks and controls the rope used to bind the goods on the rope hook 22.

[0045] One end of the inner connecting block 43 is rotatably mounted on the end of the arc-shaped locking block 42 facing the safety buckle 32, and the other end is hinged and limited to the sliding position between the two safety buckles 32 via the central round rod 45. The two safety buckles 32 are provided with arc-shaped sliding grooves 321 for the central round rod 45 to slide. When the arc-shaped locking block 42 is driven down by the hydraulic cylinder 41, the inner connecting block 43 and the safety buckle 32 are connected and cooperated to form a firm closed loop for the rope hook 22. The rope for lifting goods cannot get off the rope hook 22 and will be locked on the rope hook 22. The reaction component 5 is provided on the rope hook 22 and is used to quickly protect and control different abnormal situations of the rope.

[0046] Reference Figure 7 and Figure 8As shown, in order to respond quickly to abnormal conditions that occur during hoisting and to prevent the occurrence of danger in time, the reaction component 5 includes an arc-shaped abutment block 51, a lifting spring 52, a pressure sensor 53, and a side linkage component 6. The arc-shaped abutment block 51 is symmetrically embedded and slidably mounted on the rope hook 22 via an inner rectangular block 54. The rope hook 22 is symmetrically provided with an arc-shaped groove 222 for embedding and installing the arc-shaped abutment block 51 and a rectangular inner groove 223 communicating with the arc-shaped groove 222 for installing the inner rectangular block 54. The lifting spring 52 is disposed in the rectangular inner groove 223. In section 23, one end is fixedly connected to the bottom wall of the inner rectangular groove 223, and the other end is fixedly connected to the inner rectangular block 54. The lifting spring 52 always has the tendency to push the arc-shaped abutment block 51 upward through the inner rectangular block 54. The inner rectangular block 54 has an inner circular hole 541 for the lifting spring 52 to retract. The pressure sensor 53 is installed in the embedded arc-shaped groove 222 and can control the hydraulic cylinder 41 to start operation. The side linkage 6 is symmetrically arranged on both sides of the rope hook 22 and is used to control and protect against different abnormal states that occur during the rope hoisting of goods.

[0047] When goods are hoisted by ropes and hooks 22, the weight of the goods acts on the arc-shaped abutment 51 through the ropes, causing the arc-shaped abutment 51 to slide downwards and retract into the arc-shaped groove 222. At this time, the lower side of the arc-shaped abutment 51 abuts against the pressure sensor 53. If the force acting on the arc-shaped abutment 51 changes during the hoisting process, such as when one end of the rope binding the goods breaks or is not securely bound, causing one end of the rope to separate from the goods, the reduced force allows the push spring 52 to push the arc-shaped abutment 51. When block 51 separates upward from pressure sensor 53, the falling cargo causes a portion of the rope to rapidly travel along the rope hook 22. Since pressure sensor 53 is separated from arc-shaped block 51, pressure sensor 53 feeds back information to the central controller (such as a PLC controller) through the sensor module, so that the central controller drives hydraulic cylinder 41 to start, pushing arc-shaped locking block 42 down to fasten the rope. Under the force of hydraulic cylinder 41, the rope is locked on rope hook 22 to prevent the cargo from falling.

[0048] Reference Figure 9 and Figure 10As shown, in order to cope with various abnormal situations and further improve safety protection, the side linkage component 6 includes a rectangular side block 61, a dovetail diagonal rod 62, a side roller 63, a U-shaped end block 64, a push spring 65, and a monitor 7; the rectangular side block 61 is symmetrically fixedly installed on both sides of the rope hook 22, the dovetail diagonal rod 62 is limited and slidably mounted on the rectangular side block 61, and the rectangular side block 61 has a dovetail vertical groove 611 for the installation of the dovetail diagonal rod 62. The side roller 63 is rotatably mounted on the dovetail diagonal rod 62 away from the rectangular side block 61 via the inner connecting round rod 66. One end of the rectangular side block 61 is fixedly fitted with a U-shaped end block 64 at the upper end of the rectangular side block 61, so that the dovetail vertical groove 611 is constructed as a sliding area that has a limiting effect on the dovetail inclined rod 62; the push spring 65 is provided in the dovetail vertical groove 611 of the rectangular side block 61, one end is fixedly connected to the rectangular side block 61, and the other end is fixedly connected to the lower end of the dovetail inclined rod 62. The push spring 65 always has the tendency to push the dovetail inclined rod 62 upward; the monitor 7 is provided on the inner connecting round rod 66 and the dovetail inclined rod 62 to monitor the rotation of the side roller 63.

[0049] When the goods are suspended on the rope hook 22 by the rope, on the one hand, the arc-shaped abutment block 51 will slide downward and retract into the arc-shaped groove 222. On the other hand, due to the action of the push spring 65, the height of the side roller 63 in the initial state will be higher than the height of the lowest point of the rope hook 22. As a result, the rope will push down the side roller 63 and the dovetail rod 62 and slide down. The side roller 63 will always be in contact with the rope under the action of the push spring 65. When the rope moves on the rope hook 22, it will drive the side roller 63 to rotate.

[0050] Reference Figure 11 and Figure 12 The diagram shows the structure of the monitor 7 in this embodiment. The monitor 7 includes a sensing rod 71, an inner rotating cylinder 72, and an inner rectangular block 73. The sensing rod 71 is fixedly installed on the dovetail brace 62. The sensing rod 71 has the same function as the pressure sensor 53, both of which can control the start of the hydraulic cylinder 41. One end of the inner rotating cylinder 72 is rotatably mounted on the sensing rod 71, and the other end extends into the inner connecting rod 66. The inner connecting rod 66 has an inner circular groove 661 for the inner rotating cylinder 72 to be inserted. One end of the inner rectangular block 73 is fixedly installed in the inner circular groove 661, and the other end extends into the inner rotating cylinder 72. The inner rotating cylinder 72 has an inner groove 721 that matches the inner rectangular block 73. When the side roller 63 rotates, the inner connecting rod 66 will rotate synchronously, which will drive the inner rotating cylinder 72 to rotate through the inner rectangular block 73.

[0051] When the cargo sways excessively during hoisting, the rope will slide on the rope hook 22, causing the side roller 63 to rotate. The rotating side roller 63, through the inner rectangular block 73 installed in the inner circular slot 661, can drive the inner rotating cylinder 72 to rotate synchronously. When the cargo's center of gravity continues to shift, causing the rope to continue sliding on the rope hook 22, the side roller 63 and the inner rotating cylinder 72 will continue to rotate. If the inner rotating cylinder 72 rotates for too long, it can trigger the sensing support rod 71 to operate, driving the hydraulic cylinder 41 to push the arc-shaped locking block 42 down and fasten it to the sliding rope. This ensures that when the cargo sways excessively, the rope suspending the cargo can be locked and limited in time to prevent the continuous shift of the cargo's center of gravity from causing safety hazards.

[0052] Looking back Figure 3 As shown, to ensure immediate alert to staff in case of abnormal situations, a warning light 74 controlled by the sensing rod 71 and pressure sensor 53 is installed on the upper side of the steel structure block 11. When the pressure sensor 53 and the sensing rod 71 trigger the operation of the hydraulic cylinder 41, the warning light 74 will illuminate immediately to alert the staff.

[0053] Example 2:

[0054] Reference Figure 13 and Figure 14 As shown, based on Embodiment 1, in order to further improve the early warning of staff and provide effective backup protection in the event of an anomaly, the steel structure configuration block 11 is also provided with a protective mechanism 8. The protective mechanism 8 includes an arc-shaped toothed rod 81, a limiting end block 82, a grooved round rod 83, a drive gear 84, and a drive unit 9. The two arc-shaped toothed rods 81 are symmetrically slidably disposed in the assembly groove 111 of the steel structure configuration block 11 through the arc-shaped limiting strip 85. The steel structure configuration block 11 is symmetrically provided with convex sliding openings 112 that communicate with the assembly groove 111 for sliding installation of the arc-shaped toothed rods 81 and the arc-shaped limiting strip 85. The limiting end block 82 is fixedly locked at one end of the arc-shaped limiting strip 85 located in the assembly groove 111. When the arc-shaped toothed rod 81 is subjected to force, it can extend out of the steel structure configuration block 11. However, due to the action of the limiting end block 82, one end of the arc-shaped toothed rod 81 is always in the assembly groove 111 and will not detach from the steel structure configuration block 11.

[0055] The circular rods 83 are symmetrically rotated within the assembly slots 111 of the steel structure configuration block 11. Two drive gears 84 are fixedly sleeved on the two circular rods 83 and mesh with the two arc-shaped toothed rods 81 respectively. The drive unit 9 is located within the assembly slots 111 and is used to synchronously drive the two arc-shaped toothed rods 81. Under the drive of the drive unit 9, the two arc-shaped toothed rods 81 can slide synchronously downwards from the steel structure configuration block 11, eventually forming a ring below the rope hook 22. This provides secondary protection for the rope that may detach in extreme situations. The rope that detaches from the rope hook 22 will be suspended in the closed loop formed by the two arc-shaped toothed rods 81.

[0056] Reference Figure 14 As shown, since it is necessary to drive the two arc-shaped gear rods 81 synchronously for safe and effective protection, the drive unit 9 includes a dual-axis motor 91, transmission rods 92, bevel gear 1 93, and bevel gear 2 94. The dual-axis motor 91 is fixedly installed on the inner side wall of the assembly slot 111 of the steel structure configuration block 11 through the motor base 95. The two transmission rods 92 are symmetrically rotated on both sides of the dual-axis motor 91 through the stabilizing support plate 96, and are fixedly connected to the two rotating ends of the dual-axis motor 91 respectively. The two bevel gears 1 93 are fixedly sleeved on the ends of the two transmission rods 92 away from the dual-axis motor 91 respectively. The two bevel gears 2 94 are fixedly sleeved on the two inner rods 83 in the slots respectively, and mesh with the two bevel gears 1 93 respectively.

[0057] When lifting and hoisting goods, the dual-shaft motor 91 will start and drive the inner rod 83 of the drive groove through the meshing of bevel gear 1 93 and bevel gear 2 94. This causes the drive gear 84 to drive the arc-shaped toothed rod 81 to slide out of the steel structure block 11 and form a closed loop below the rope hook 22. In extreme cases, such as when the safety buckle 32 falls off and breaks, or when the pressure sensor 53 and the sensing support rod 71 fail, the rope for hoisting goods will be reattached to the closed loop formed below the rope hook 22 when it comes off. This achieves the effect of effective early warning and protection for the goods during the hoisting process.

[0058] The implementation principle of this embodiment is as follows:

[0059] (1) Lifting and hoisting: Tie the two ends of the goods to be transferred with ropes, then hang the ropes on the rope hook 22, and start the tower crane to lift the goods by ropes.

[0060] (2) Early warning and protection: When the cargo is lifted, the dual-axis motor 91 starts and drives the inner round rods 83 of the two slots to rotate synchronously. The two drive gears 84 fixedly sleeved on the inner round rods 83 of the two slots can synchronously drive the two arc-shaped toothed rods 81 to slide out of the steel structure block 11, forming a closed loop below the rope hook 22, so as to provide early warning and protection against the situation of rope detachment in extreme cases.

[0061] (3) Rope release locking: When the goods are suspended on the rope hook 22 by the rope, the weight of the goods will act on the arc-shaped stop block 51 through the rope, causing the arc-shaped stop block 51 to slide downward and retract into the arc-shaped groove 222 to contact the pressure sensor 53. Once the end of the rope binding the goods breaks or is not firmly bound during the hoisting process, the end of the rope will separate from the goods. At this time, due to the reduced force, the push spring 52 can push the arc-shaped stop block 51 upward to separate from the pressure sensor 53. The falling of the goods will cause part of the rope to quickly shuttle on the rope hook 22. The separation of the pressure sensor 53 from the arc-shaped stop block 51 will quickly drive the hydraulic cylinder 41 to start, pushing the arc-shaped locking block 42 to slide down and lock the rope, so as to prevent the goods from falling further.

[0062] (4) Offset Locking: When the goods are suspended on the rope hook 22 by the rope, the arc-shaped abutment block 51 will slide down and retract into the arc-shaped groove 222. At the same time, the rope will push down the side roller 63 and the dovetail rod 62 and slide down. The side roller 63 will always be in contact with the rope under the action of the push spring 65. When the center of gravity of the goods swings too much, it will pull the rope to slide on the rope hook 22, which will drive the side roller 63 to rotate. Through the inner rectangular block 73, it can drive the inner rotating cylinder 72 to rotate synchronously. If the inner rotating cylinder 72 rotates for too long, it can trigger the operation of the sensing support rod 71 to drive the hydraulic cylinder 41 to push the arc-shaped locking block 42 down and fasten it to the sliding rope, so as to lock and limit the rope of the suspended goods in time to prevent the continuous offset of the center of gravity of the goods from forming a safety hazard.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A warning device for a tower crane, comprising a wire rope and a steel structure block disposed at the lower end of the wire rope, the steel structure block having an assembly groove, characterized in that: The steel structure configuration block is equipped with a pre-control device; The pre-control device includes an assembly round protrusion fixedly installed on the lower side of the steel structure configuration block, a rope hook fixedly installed at the lower end of the assembly round protrusion, and a pre-locking mechanism provided on the rope hook and the steel structure configuration block; The pre-locking mechanism includes a T-shaped bar block, safety buckles, and an anti-disengagement unit. The T-shaped bar block is fixedly mounted on the rope hook, and the two safety buckles are symmetrically rotated and installed on the T-shaped bar block. The anti-disengagement unit is located in the assembly slot of the rope hook and the steel structure block. The anti-disengagement unit includes a hydraulic cylinder, an arc-shaped locking block, an inner connecting block, and a reaction component. The hydraulic cylinder is fixedly installed in the assembly slot of the steel structure configuration block, and its telescopic end extends downward through the steel structure configuration block and the assembly round protrusion to the rope hook. Both the steel structure configuration block and the assembly round protrusion have round through holes that communicate with the assembly slot for the installation of the hydraulic cylinder. The arc-shaped locking block is fixedly installed on the telescopic end of the hydraulic cylinder through the middle connecting block. The rope hook has a sliding port that communicates with the round through holes for the installation of the arc-shaped locking block. One end of the inner connecting block is rotatably installed on the end of the arc-shaped locking block facing the safety buckle, and the other end is hinged and limited to the two safety buckles through the middle round rod and slidably positioned between them. The two safety buckles are provided with arc-shaped grooves for the middle round rod to slide and install. The reaction component is located on the rope hook. The reaction assembly includes an arc-shaped stop block, a lifting spring, a pressure sensor, and a lateral linkage component. The arc-shaped stop block is symmetrically embedded and slidably mounted on the rope hook via an inner rectangular block. The rope hook has symmetrically opened arc-shaped grooves for the arc-shaped stop block to be embedded and a rectangular inner groove communicating with the arc-shaped grooves for the inner rectangular block to be installed. The lifting spring is set in the rectangular inner groove, with one end fixedly connected to the bottom wall of the rectangular inner groove and the other end fixedly connected to the inner rectangular block. The inner rectangular block has an inner circular hole for the lifting spring to retract. The pressure sensor is installed in the arc-shaped groove, and the lateral linkage components are symmetrically arranged on both sides of the rope hook. The side linkage includes a rectangular side block, a dovetail brace, a side roller, a U-shaped end block, a push spring, and a monitor. The rectangular side blocks are symmetrically fixed on both sides of the rope hook. The dovetail brace is slidably limited on the rectangular side block. The rectangular side block has a dovetail groove for the dovetail brace to be installed. The side roller is rotatably mounted on the end of the dovetail brace away from the rectangular side block via an inner connecting rod. The U-shaped end block is fixedly clamped on the upper end of the rectangular side block. The push spring is located in the dovetail groove of the rectangular side block, with one end fixedly connected to the rectangular side block and the other end fixedly connected to the lower end of the dovetail brace. The monitor is located on the inner connecting rod and the dovetail brace.

2. The early warning device for tower cranes according to claim 1, characterized in that: The monitor includes a sensing support rod, an inner rotating cylinder, and an inner rectangular block. The sensing support rod is fixedly installed on a dovetail brace. One end of the inner rotating cylinder is rotatably mounted on the sensing support rod, and the other end extends into the inner connecting rod. The inner connecting rod has an inner circular groove for the inner rotating cylinder to be inserted into. One end of the inner rectangular block is fixedly installed in the inner circular groove, and the other end extends into the inner rotating cylinder. The inner rotating cylinder has an inner groove that matches the inner rectangular block.

3. The early warning device for tower cranes according to claim 2, characterized in that: Warning lights, controlled by sensing rods and pressure sensors, are installed on the upper side of the steel structure block.

4. The early warning device for a tower crane according to claim 1, characterized in that: The steel structure configuration block is located on the assembly slot and is fixedly covered with an outer panel.

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