Early warning device for tower crane

Abstract

The invention relates to an early warning device for a tower crane, and relates to the technical field of tower crane equipment, the early warning device comprises a steel wire rope and a steel structure configuration block arranged at the lower end of the steel wire rope, the steel structure configuration block is provided with an assembly groove, and the steel structure configuration block is provided with a pre-control device; the pre-control device comprises an assembly round protruding block fixedly arranged on the lower side of the steel structure configuration block, a rope lifting hook is fixedly installed at the lower end of the assembly round protruding block, and pre-locking mechanisms are arranged on the rope lifting hook and the steel structure configuration block. The tower crane has the beneficial effects that early warning protection can be conducted in real time when the tower crane lifts goods, when the goods have unhooking and falling risks due to external influences, safety control is conducted in time to prevent the goods from falling suddenly, and potential safety hazards are further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of tower crane equipment, and in particular to an early warning device for a tower crane. Background Art

[0002] Tower crane is a common lifting equipment with a large working range. It is mainly used for vertical transportation of materials and component installation in multi-story and high-rise building construction. The main structure of a tower crane is usually composed of a steel structure, consisting of a tower structure, a rotating mechanism, a lifting mechanism, a luffing mechanism and a counterweight; the lifting mechanism realizes the vertical lifting and lowering of goods through a winch mechanism and a wire rope. The hook of a tower crane, as a carrier for transporting and carrying goods, plays a vital role in the lifting operation. In the process of lifting goods, it often shakes due to wind in the air and improper operation of the staff and excessive speed. Nowadays, goods are usually hung on the hook with ropes, without other early warning and protection devices. The shaking caused by the lifting process and the loose fixing of the ropes are prone to unhooking of goods, which poses certain safety hazards.

[0003] For example, in the existing Chinese patent with publication number CN116443722A, a deformation monitoring device and monitoring method for a tower crane are disclosed, which includes a tower crane for hoisting profiles, a rotating assembly for driving it to rotate at a uniform speed to transport the profiles is installed on the lower surface of the tower crane, the rotating assembly includes a rotating motor and a connecting block for connecting and supporting, a tower base for supporting the tower crane is installed on the lower surface of the rotating assembly, a hoisting steel rope is arranged on the surface of the tower crane, a buffer mechanism is arranged on the outer surfaces of both sides of the tower crane, a limiting mechanism is arranged on the outer surface of the hoisting steel rope, and an alarm mechanism is arranged on the outer surface of the tower crane. Through the above-mentioned existing technology, the limit mechanism set can guide and limit the lifting rope during operation, and realize early warning when it shakes. In the process of adjustment, the lifting rope passes through the guide cylinder and is clamped and guided by the guide blocks of the annular array to lift the profile. The tension pressure sensor monitors the lifting of the lifting rope. The rubber ring binds the lower end of the guide block that is in an open state due to the action of the torsion spring. When the lifting rope is hit and shakes, the rubber ring rubs in the lower end slide groove of the guide block. When the impact force exceeds the limit value, the rubber ring breaks, and the guide block expands and squeezes the extrusion spring, thereby triggering the induction ring to stop the tower crane from operating, thereby preventing structural damage or accidents.

[0004] However, the above prior art has the following technical defects: The above-mentioned prior art can monitor the hoisting rope during the process of lifting goods. The hoisting rope will shake when hit. When the impact force exceeds the limit value, the induction ring is triggered by squeezing the spring, prompting the crane to stop running. However, at this time, the goods lifted by the hoisting rope will not stop shaking because the crane stops running. On the contrary, the sudden stop of operation will increase the shaking amplitude, further increasing the risk of goods falling and increasing safety hazards. Moreover, when the goods shake during the lifting process, the above-mentioned device can only alarm to warn the staff, and cannot take effective protective measures in time to prevent the goods from falling suddenly when there is a risk of falling during the lifting process, thereby causing serious safety accidents and property losses.

[0005] Based on this, on the basis of the existing tower crane deformation monitoring device and monitoring method, in order to overcome the above-mentioned technical defects, there is still room for improvement. Summary of the invention

[0006] In order to provide real-time early warning and protection when a tower crane is lifting cargo, when the cargo is at risk of unhooking and falling due to external influences, timely safety control can be carried out to prevent the cargo from suddenly falling, thereby further reducing safety hazards, the present application provides an early warning device for a tower crane.

[0007] The present application provides an early warning device for a tower crane, which adopts the following technical solution: An early warning device for a tower crane comprises a steel wire rope and a steel structure configuration block arranged at the lower end of the steel wire rope, wherein the steel structure configuration block is provided with an assembly groove and a pre-control device; The pre-control device comprises a circular assembly protrusion fixedly arranged on the lower side of the steel structure configuration block, a rope hook is fixedly installed on the lower end of the circular assembly protrusion, and a pre-locking mechanism is arranged on the rope hook and the steel structure configuration block.

[0008] Preferably, the pre-locking mechanism includes a T-shaped rod block, a safety buckle and an anti-unhooking unit, the T-shaped rod block is fixedly arranged on the rope hook, the two safety buckles are symmetrically rotated and installed on the T-shaped rod block, and the anti-unhooking unit is arranged in the assembly groove of the rope hook and the steel structure configuration block.

[0009] Preferably, the anti-unhooking unit comprises a hydraulic cylinder, an arc-shaped locking block, an inner connecting block and a reaction assembly, the hydraulic cylinder is fixedly arranged in the assembly groove of the steel structure configuration block, and the telescopic end penetrates downwardly through the steel structure configuration block and the assembly round protrusion to extend toward the rope hook, the steel structure configuration block and the assembly round protrusion are both provided with a round through hole connected to the assembly groove for the installation of the hydraulic cylinder, the arc-shaped locking block is fixedly arranged at the telescopic end of the hydraulic cylinder through the middle connecting block, and the rope hook is provided with a sliding port connected to the round through hole for the installation of the arc-shaped locking block; One end of the inner connecting block is rotatably mounted on one end of the arc-shaped locking block facing the safety buckle, and the other end is hinged through a middle round rod and limitedly slidably arranged between the two safety buckles. The two safety buckles are provided with an arc-shaped sliding groove for sliding installation of the middle round rod, and the reaction component is arranged on the rope hook.

[0010] Preferably, the reaction component includes an arc-shaped resistance block, a push-up spring, a pressure sensor and a side linkage. The arc-shaped resistance block is symmetrically embedded and slidably arranged on the rope hook through an inner rectangular block. The rope hook is symmetrically provided with an embedded arc groove for the arc-shaped resistance block to be embedded and installed, and a rectangular inner groove connected with the embedded arc groove for the installation of the inner rectangular block. The push-up spring is arranged in the rectangular inner groove, one end of which is fixedly connected to the inner bottom wall of the rectangular inner groove, and the other end is fixedly connected to the inner rectangular block. The inner rectangular block is provided with an inner circular hole for the push-up spring to contract. The pressure sensor is installed in the embedded arc groove, and the side linkage is symmetrically arranged on both sides of the rope hook.

[0011] Preferably, the side linkage comprises a rectangular side block, a dovetail inclined rod, a side roller, a U-shaped end block, a push spring and a monitor, the rectangular side blocks are symmetrically fixedly installed on both sides of the rope hook, the dovetail inclined rod is limitedly slidably arranged on the rectangular side blocks, the rectangular side blocks are provided with a dovetail vertical groove for the installation of the dovetail inclined rod, the side roller is rotatably arranged at the end of the dovetail inclined rod away from the rectangular side block through an inner connecting round rod, the U-shaped end block is fixedly clamped at the upper end of the rectangular side block, the push spring is arranged in the dovetail vertical groove of the rectangular side block, one end is fixedly connected to the rectangular side block, and the other end is fixedly connected to the lower end of the dovetail inclined rod, and the monitor is arranged on the inner connecting round rod and the dovetail inclined rod.

[0012] Preferably, the monitor includes a sensing support rod, an inner rotating cylinder and an inner center rectangular block, the sensing support rod is fixedly mounted on the dovetail inclined rod, one end of the inner rotating cylinder is rotatably mounted on the sensing support rod, and the other end extends into the inner connecting circular rod, the inner connecting circular rod is provided with an inner circular groove hole for the inner rotating cylinder to be inserted and installed, one end of the inner center rectangular block is fixedly mounted in the inner circular groove hole, and the other end extends into the inner rotating cylinder, and the inner rotating cylinder is provided with an inner entry groove adapted to the inner center rectangular block.

[0013] Preferably, a warning light controlled by an induction support rod and a pressure sensor is arranged on the upper side of the steel structure configuration block.

[0014] Preferably, the steel structure configuration block is located on the assembly groove and is fixedly covered with an outer clamping plate.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. First, the goods to be lifted are bound and hung on the rope hook by ropes. The safety buckle installed on the rope hook through the T-shaped rod block has a preliminary limiting effect on the rope binding the goods, which can prevent the rope from being easily unhooked and falling; and when the goods are lifted, the rope will drive the arc-shaped block and the side roller to slide down, so that the arc-shaped block will contact the pressure sensor for operation, and the side rollers on both sides of the rope hook will always contact the rope binding the goods under the action of the push spring to operate the sensing support rod.

[0016] 2. When one end of the rope bound to the cargo is separated from the cargo, the cargo falls and the rope passes rapidly through the rope hook. At this time, the pressure of the rope originally acting on the arc-shaped block changes. Under the action of the push-up spring, the arc-shaped block is separated from the pressure sensor. The pressure sensor will quickly drive the hydraulic cylinder to operate, so that the arc-shaped locking block quickly buckles down and presses against the shuttle rope, thereby locking the rope so that the cargo will no longer fall. Synchronously, the safety buckle will be driven by the linkage of the inner connecting block to further tighten the rope to limit the position.

[0017] 3. During the lifting process, when the staff operates the crane to rotate the goods too fast or encounters strong winds at high altitudes, the goods will shake, and the center of gravity will be unstable, causing the rope to slide on the rope hook. At this time, the side rollers that are in contact with the rope will rotate. When the rotation time is too long, it means that the center of gravity of the goods is continuously shifting, driving the rope to continue to slide on the rope hook. At this time, the inner center block will synchronously drive the inner rotating cylinder installed on the induction support rod to rotate when the side roller rotates. When the inner rotating cylinder rotates a large number of circles, the induction support rod will also quickly drive the hydraulic cylinder to operate, and tighten the rope through the arc-shaped locking block to prevent the center of gravity of the goods from continuously shifting and affecting the safety of lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the pre-control device and the pre-locking mechanism of the present invention.

[0020] Figure 3 It is a schematic diagram of the anti-unhooking unit and the warning light of the present invention.

[0021] Figure 4 The present invention Figure 3 A magnified image of area A.

[0022] Figure 5 It is a schematic diagram of some components of the anti-unhooking unit of the present invention.

[0023] Figure 6 It is a cross-sectional view of the rope hook of the present invention and an installation view of some components of the anti-unhooking unit.

[0024] Figure 7Schematic diagram of the reaction assembly of the present invention.

[0025] Figure 8 It is a cross-sectional view of the rope hook of the present invention and an installation view of some parts of the reaction assembly.

[0026] Fig. 9 It is a schematic diagram of the side linkage member of the present invention.

[0027] Fig.10 It is an exploded view of some components of the side linkage member of the present invention.

[0028] Fig.11 It is a cross-sectional view of the monitor of the present invention.

[0029] Fig.12 It is an exploded view of some components of the monitor of the present invention.

[0030] Fig.13 It is a cross-sectional exploded view of the preventive protection mechanism of the present invention.

[0031] Fig.14 It is a cross-sectional view of the steel structure configuration block and a schematic diagram of the drive unit of the present invention.

[0032] Description of the reference numerals: 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 rod block; 32. Safety buckle; 4. Anti-unhooking unit; 41. Hydraulic cylinder; 42. Arc-shaped locking block; 43. Inner connecting block; 5. Reaction component; 211. Round perforation; 44. Middle connecting block; 221. Sliding port; 45. Middle round rod; 321. Arc-shaped slide groove; 51. Arc-shaped block; 52. Push-up spring; 53. Pressure sensor; 6. Side linkage; 54. Inner rectangular block; 222. Embedded arc groove; 223. Rectangular inner groove; 541. Inner circular hole; 61. Rectangular side block; 62, dovetail inclined rod; 63, side roller; 64, U-shaped end block; 65, push spring; 7, monitor; 611, dovetail vertical groove; 66, inner connecting round rod; 71, induction support rod; 72, inner rotating cylinder; 73, inner center block; 661, inner circular groove hole; 721, inner entry groove; 74, warning light; 12, outer side joint plate; 8, preventive protection mechanism; 81, arc gear rod; 82, limit end block; 83, round rod in groove; 84, driving gear; 9, driving unit; 85, arc limit strip; 112, convex sliding mouth; 91, dual-axis motor; 92, transmission round rod; 93, bevel gear one; 94, bevel gear two; 95, motor seat; 96, stable support plate. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-Figure 14 This application is described in further detail.

[0034] The embodiment of the present application discloses an early warning device for a tower crane, which can provide real-time early warning protection when the tower crane is lifting goods. When the goods are affected by external factors and there is a risk of unhooking and falling, timely safety control can be performed to prevent the goods from falling suddenly, thereby further reducing safety hazards.

[0035] Embodiment 1: Reference Figure 1 and Figure 2 As shown, the present application provides an early warning device for a tower crane, comprising a steel wire rope 1 and a steel structure configuration block 11 arranged at the lower end of the steel wire rope 1, and the other end of the steel wire rope 1 is connected to the lifting mechanism of the tower crane; the steel structure configuration block 11 is provided with an assembly groove 111, and the steel structure configuration block 11 is provided with a pre-control device 2. The pre-control device 2 includes an assembly circular protrusion 21 fixedly arranged at the lower side of the steel structure configuration block 11, and a rope hook 22 is fixedly installed at the lower end of the assembly circular protrusion 21. The rope hook 22 is fixedly arranged at the lower side of the steel structure configuration block 11 through the assembly circular protrusion 21, which can increase the action area of ​​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 shake abnormally during lifting, so as to improve the safety and anti-falling effect of the goods during transportation. The steel structure configuration block 11 is located on the assembly groove 111 and is fixedly covered with an outer plywood 12 for protecting related equipment installed in the assembly groove 111 .

[0036] When lifting, the goods to be transferred are first hung on the rope hook 22 by a rope. The gravity of the goods acts directly on the rope hook 22 through the rope. The staff starts the tower crane to control the rope hook 22 to lift the goods through the wire rope 1. During the lifting process, the pre-locking mechanism 3 can be used to quickly lock and control the rope when there is a risk of falling due to excessive shaking or the rope is not firmly bound to the goods and separates, thereby further reducing the occurrence of falling.

[0037] Reference Figure 3 and Figure 4As shown, specifically, the pre-locking mechanism 3 includes a T-shaped rod block 31, a safety buckle 32 and an anti-unhooking unit 4; the T-shaped rod block 31 is fixedly arranged on the rope hook 22, and the two safety buckles 32 are symmetrically mounted on the T-shaped rod block 31. It should be noted that the two safety buckles 32 are so long that they cannot be rotated outside the hanging mouth of the rope hook 22; when the cargo is hung on the rope hook 22 by a rope, the two safety buckles 32 can initially prevent the rope from unhooking to prevent the cargo from easily unhooking and falling when it shakes in the air; the anti-unhooking unit 4 is arranged in the assembly groove 111 of the rope hook 22 and the steel structure configuration block 11, and is used to cooperate with the safety buckle 32 to further improve the anti-unhooking property during hanging, and at the same time, the rope can be firmly fastened and locked when an abnormal situation occurs.

[0038] Reference Figure 5 and Figure 6 As shown, considering that in the process of lifting goods by the tower crane, the goods in the air are easily affected by strong winds and the workers' operation and rotation and transfer are too fast, the goods are shaken and easily unhooked and fall. In order to reduce the increase of this risk, the anti-unhooking 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 arranged in the assembly groove 111 of the steel structure configuration block 11, and the telescopic end penetrates the steel structure configuration block 11 and the assembly round protrusion 21 downward to extend toward the rope hook 22, and the steel structure configuration block 1 1 and the assembly circular protrusion 21 are both provided with a circular through hole 211 which is connected with the assembly groove 111 for installing the hydraulic cylinder 41. The arc-shaped locking block 42 is fixedly arranged at the telescopic end of the hydraulic cylinder 41 through the middle connecting block 44. The rope hook 22 is provided with a sliding opening 221 which is connected with the circular through hole 211 for installing the arc-shaped locking block 42. When the hydraulic cylinder 41 is started, the arc-shaped locking block 42 can be pushed downward to be tightly buckled on the rope hung on the rope hook 22. The rope used for binding the goods is locked and controlled on the rope hook 22 by the powerful driving force of the hydraulic cylinder 41.

[0039] One end of the inner connecting block 43 is rotatably mounted on one end of the arc-shaped locking block 42 facing the safety buckle 32, and the other end is hinged through the middle round rod 45 and limitedly slidably arranged between the two safety buckles 32. The two safety buckles 32 are provided with an arc-shaped slide groove 321 for the sliding installation of the middle round rod 45. When the arc-shaped locking block 42 is driven to slide 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 with the rope hook 22. The rope for lifting the goods cannot be separated from the rope hook 22 and will be fastened and locked on the rope hook 22; the reaction component 5 is arranged on the rope hook 22, which is used to quickly protect and control different abnormal conditions of the rope.

[0040] Reference Figure 7 and Figure 8As shown, since it is necessary to react quickly to abnormal conditions occurring during lifting and to prevent the occurrence of dangerous situations in time, the reaction assembly 5 includes an arc-shaped stopper 51, a push-up spring 52, a pressure sensor 53 and a side linkage 6; the arc-shaped stopper 51 is symmetrically embedded and slidably arranged on the rope hook 22 through an inner rectangular block 54, and the rope hook 22 is symmetrically provided with an embedded arc groove 222 for embedding and installation of the arc-shaped stopper 51 and a rectangular inner groove 223 connected to the embedded arc groove 222 for installation of the inner rectangular block 54, and the push-up spring 52 is arranged in the rectangular inner groove 2 23, one end is fixedly connected to the inner bottom wall of the rectangular inner groove 223, and the other end is fixedly connected to the inner rectangular block 54. The push-up spring 52 always has the tendency to push the arc-shaped stop block 51 upward through the inner rectangular block 54; the inner rectangular block 54 is provided with an inner circular hole 541 for the push-up spring 52 to contract, and the pressure sensor 53 is installed in the embedded arc-shaped groove 222, which can control the hydraulic cylinder 41 to start operation; the side linkage parts 6 are symmetrically arranged on both sides of the rope hook 22, which are used to make corresponding control protection for different abnormal conditions that occur during the rope lifting of goods.

[0041] When the cargo is hung on the rope hook 22 by a rope for lifting, the gravity of the cargo acts on the arc-shaped stop block 51 through the rope, driving the arc-shaped stop block 51 to slide downward and shrink into the embedded arc-shaped groove 222. At this time, the lower side of the arc-shaped stop block 51 conflicts with the pressure sensor 53. Once the force acting on the arc-shaped stop block 51 changes during the lifting process, such as one end of the rope bound to the cargo breaks or is not firmly bound, and one end of the rope is separated from the cargo; at this time, the force becomes lighter, so that the push spring 52 can push the arc-shaped stop block 51. The block 51 is separated upward from the pressure sensor 53. At this time, the cargo falls, causing a part of the rope to rapidly shuttle on the rope hook 22. Since the pressure sensor 53 is separated from the arc-shaped stop block 51, the 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 the hydraulic cylinder 41 to start, pushes the arc-shaped locking block 42 to slide down and tighten the rope, so that the rope is locked on the rope hook 22 under the force of the hydraulic cylinder 41 to achieve the effect of preventing the cargo from falling.

[0042] Reference Fig. 9 and Fig.10As shown, in order to cope with various abnormal situations and further improve safety protection, the side linkage 6 includes a rectangular side block 61, a dovetail inclined 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 inclined rod 62 is limitedly slidably arranged on the rectangular side block 61, and a dovetail vertical groove 611 for installing the dovetail inclined rod 62 is opened on the rectangular side block 61, and the side roller 63 is rotatably arranged on the dovetail inclined rod 62 away from the rectangular side block 61 through the inner connecting round rod 66. One end of the U-shaped side block 61, the U-shaped end block 64 is fixedly clamped on the upper end of the rectangular side block 61, so that the dovetail vertical groove 611 is constructed as a sliding area with a limiting effect on the dovetail inclined rod 62; the push spring 65 is arranged 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, and the push spring 65 always has a tendency to push the dovetail inclined rod 62 upward; the monitor 7 is arranged on the inner connecting round rod 66 and the dovetail inclined rod 62, and is used to monitor the rotation of the side roller 63.

[0043] When the cargo is hung on the rope hook 22 by a rope, on the one hand, the arc-shaped resistance block 51 will be driven to slide downward and shrink into the embedded 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, and then the rope will resist and press the side roller 63 and the dovetail inclined rod 62 to slide down. The side roller 63 is always 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.

[0044] Reference Fig.11 and Fig.12 As shown, it is a schematic diagram of the structure of the monitor 7 in this embodiment. The monitor 7 includes a sensing support rod 71, an inner rotating cylinder 72 and an inner center block 73; the sensing support rod 71 is fixedly installed on the dovetail inclined rod 62, and the sensing support rod 71 has the same function as the pressure sensor 53, and both can start and control the hydraulic cylinder 41; one end of the inner rotating cylinder 72 is rotatably arranged on the sensing support rod 71, and the other end extends into the inner connecting rod 66, and the inner connecting rod 66 is provided with an inner circular groove hole 661 for the inner rotating cylinder 72 to be inserted and installed, one end of the inner center block 73 is fixedly installed in the inner circular groove hole 661, and the other end extends into the inner rotating cylinder 72, and the inner rotating cylinder 72 is provided with an inner entry groove 721 adapted to the inner center block 73, when the side roller 63 rotates, the inner connecting rod 66 will rotate synchronously, and the inner rotating cylinder 72 will be driven to rotate through the inner center block 73.

[0045] When the cargo shakes and the center of gravity shifts too much during lifting, the rope will be pulled to slide on the rope hook 22, thereby driving the side roller 63 to rotate. The rotating side roller 63 can drive the inner rotating cylinder 72 to rotate synchronously through the inner middle moment block 73 installed in the inner circular groove hole 661. When the center of gravity of the cargo continues to shift and the rope continues to slide on the rope hook 22, the side roller 63 and the inner rotating cylinder 72 will be driven to rotate continuously. If the inner rotating cylinder 72 rotates for too long, it can trigger the sensing support rod 71 to operate and drive the hydraulic cylinder 41 to push the arc locking block 42 to press down and buckle on the sliding rope, so that when the cargo shakes and shifts excessively, the rope hanging the cargo can be locked and limited in time to prevent the continuous shift of the center of gravity of the cargo from forming a safety hazard.

[0046] Replay Figure 3 As shown, in order to warn the staff immediately when an abnormal situation occurs, a warning light 74 controlled by the sensing support rod 71 and the pressure sensor 53 is provided on the upper side of the steel structure configuration block 11. When the pressure sensor 53 and the sensing support rod 71 trigger the hydraulic cylinder 41 to operate, the warning light 74 will light up immediately to warn the staff.

[0047] Embodiment 2: Reference Fig.13 and Fig.14 As shown, on the basis of the first embodiment, in order to further improve the early warning of the staff and provide effective backup protection when an abnormality occurs, a preventive protection mechanism 8 is further provided on the steel structure configuration block 11. The preventive protection mechanism 8 includes an arcuate gear rod 81, a limit end block 82, a round rod 83 in the groove, a driving gear 84 and a driving unit 9. The two arcuate gear rods 81 are symmetrically penetrated and slidably arranged in the assembly groove 111 of the steel structure configuration block 11 through the arcuate limit strip 85 respectively. The steel structure configuration block 11 is symmetrically provided with convex sliding openings 112 connected to the assembly groove 111 for sliding installation of the arcuate gear rod 81 and the arcuate limit strip 85. The limit end block 82 is fixedly clamped on one end of the arcuate limit strip 85 in the assembly groove 111. When the arcuate gear rod 81 is subjected to force, it can extend out of the steel structure configuration block 11, but due to the action of the limit end block 82, one end of the arcuate gear rod 81 is always in the assembly groove 111 and will not separate from the steel structure configuration block 11.

[0048] The round rod 83 in the groove is symmetrically rotated and arranged in the assembly groove 111 of the steel structure configuration block 11. The two driving gears 84 are respectively fixedly sleeved on the round rods 83 in the two grooves and respectively mesh with the two arc-shaped toothed rods 81. The driving unit 9 is arranged in the assembly groove 111 to synchronously drive the two arc-shaped toothed rods 81; under the drive of the driving unit 9, the two arc-shaped toothed rods 81 can synchronously slide out to the bottom of the steel structure configuration block 11, and finally form a ring under the rope hook 22, which can provide secondary protection for the rope that is unhooked in extreme cases. The rope that has detached from the rope hook 22 will be hung in the closed loop formed by the two arc-shaped toothed rods 81.

[0049] Reference Fig.14 As shown, since the two arc-shaped gear rods 81 need to be driven synchronously for safe and effective protection, the drive unit 9 includes a dual-axis motor 91, a transmission round rod 92, a bevel gear 1 93 and a bevel gear 2 94; the dual-axis motor 91 is fixedly mounted on the inner wall of the assembly groove 111 of the steel structure configuration block 11 through a motor seat 95, and the two transmission round rods 92 are symmetrically rotatably arranged on both sides of the dual-axis motor 91 through a stabilizing support plate 96, and are respectively fixedly connected to the two rotating ends of the dual-axis motor 91, and the two bevel gears 1 93 are respectively fixedly sleeved on one end of the two transmission round rods 92 away from the dual-axis motor 91, and the two bevel gears 2 94 are respectively fixedly sleeved on the round rods 83 in the two grooves, and are respectively meshed with the two bevel gears 1 93.

[0050] When the cargo is lifted and hoisted, the dual-axis motor 91 will start to drive the round rod 83 in the groove to rotate through the meshing of bevel gear 1 93 and bevel gear 2 94, so that the driving gear 84 drives the arc-shaped gear rod 81 to slide out of the steel structure configuration block 11, forming a closed loop under the rope hook 22 to cope with extreme situations, for example: when the safety buckle 32 falls and breaks, the pressure sensor 53 and the induction support rod 71 fail, when the rope for hoisting the cargo detaches from the rope hook 22, it will be re-hung on the closed loop formed under the rope hook 22, thereby achieving the effect of effective early warning and protection of the cargo during the lifting process.

[0051] The implementation principle of this embodiment is: (1) Lifting and hoisting: Bind the two ends of the cargo to be transported with a rope, then hang the rope on the rope hook 22, and start the tower crane to lift the cargo with the rope for hoisting.

[0052] (2) Early warning and protection: When the cargo is lifted, the dual-axis motor 91 starts to synchronously drive the two groove inner round rods 83 to rotate. The two driving gears 84 fixedly mounted on the two groove inner round rods 83 can synchronously drive the two arc-shaped gear rods 81 to slide out of the steel structure configuration block 11, forming a closed loop under the rope hook 22, so as to provide early warning and protection against the rope being unhooked in extreme cases.

[0053] (3) Rope release locking: When the cargo is hung on the rope hook 22 by a rope, the gravity of the cargo will act on the arc-shaped stopper 51 through the rope, driving the arc-shaped stopper 51 to slide downward and shrink into the embedded arc-shaped groove 222 to collide with the pressure sensor 53. Once one end of the rope bound to the cargo breaks or is not firmly bound during the lifting process, one end of the rope will separate from the cargo. At this time, due to the lighter force, the push-up spring 52 can push the arc-shaped stopper 51 upward and separate from the pressure sensor 53. The cargo falls, causing a part of the rope to rapidly shuttle on the rope hook 22. The pressure sensor 53 separates from the arc-shaped stopper 51, which will quickly drive the hydraulic cylinder 41 to start, pushing the arc-shaped lock block 42 down to tighten the rope, so as to prevent the cargo from continuing to fall.

[0054] (4) Offset locking: When the cargo is hung on the rope hook 22 by a rope, on the one hand, the arc-shaped resistance block 51 will be driven to slide downward and shrink into the embedded arc-shaped groove 222, and at the same time, the rope will resist the downward pressure of the side roller 63 and the dovetail inclined rod 62 to slide down. The side roller 63 is always in conflict with the rope under the action of the push spring 65; when the center of gravity of the cargo is offset too much, it will pull the rope to slide on the rope hook 22, thereby driving the side roller 63 to rotate through the inner middle block 73, which can drive the inner rotating cylinder 72 to rotate synchronously. If the inner rotating cylinder 72 rotates for too long, it can trigger the induction support rod 71 to operate and drive the hydraulic cylinder 41 to push the arc-shaped locking block 42 downward to buckle on the sliding rope, so as to lock the rope for hanging the cargo in time to prevent the continuous offset of the center of gravity of the cargo from forming a safety hazard.

[0055] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An early warning device for a tower crane, comprising a steel wire rope and a steel structure configuration block arranged at the lower end of the steel wire rope, wherein the steel structure configuration block is provided with an assembly groove, and is characterized in that: The steel structure configuration block is provided with a pre-control device; The pre-control device comprises a circular assembly protrusion fixedly arranged on the lower side of the steel structure configuration block, a rope hook is fixedly installed on the lower end of the circular assembly protrusion, and a pre-locking mechanism is arranged on the rope hook and the steel structure configuration block.

2. The early warning device for a tower crane according to claim 1, characterized in that: The pre-locking mechanism includes a T-shaped rod block, a safety buckle and an anti-unhooking unit. The T-shaped rod block is fixedly arranged on the rope hook, and the two safety buckles are symmetrically rotated and installed on the T-shaped rod block. The anti-unhooking unit is arranged in the assembly groove of the rope hook and the steel structure configuration block.

3. The early warning device for a tower crane according to claim 2, characterized in that: The anti-unhooking unit includes a hydraulic cylinder, an arc-shaped locking block, an inner connecting block and a reaction assembly. The hydraulic cylinder is fixedly arranged in the assembly groove of the steel structure configuration block, and the telescopic end penetrates downward through the steel structure configuration block and the assembly round protrusion to extend toward the rope hook. The steel structure configuration block and the assembly round protrusion are both provided with a round through hole connected to the assembly groove for the installation of the hydraulic cylinder. The arc-shaped locking block is fixedly arranged at the telescopic end of the hydraulic cylinder through the middle connecting block, and the rope hook is provided with a sliding port connected to the round through hole for the installation of the arc-shaped locking block. One end of the inner connecting block is rotatably mounted on one end of the arc-shaped locking block facing the safety buckle, and the other end is hinged through a middle round rod and limitedly slidably arranged between the two safety buckles. The two safety buckles are provided with an arc-shaped sliding groove for sliding installation of the middle round rod, and the reaction component is arranged on the rope hook.

4. The early warning device for a tower crane according to claim 3, characterized in that: The reaction component includes an arc-shaped resistance block, a push-up spring, a pressure sensor and a side linkage. The arc-shaped resistance block is symmetrically embedded and slidably arranged on the rope hook through an inner rectangular block. The rope hook is symmetrically provided with an embedded arc groove for the arc-shaped resistance block to be embedded and installed, and a rectangular inner groove connected with the embedded arc groove for the installation of the inner rectangular block. The push-up spring is arranged in the rectangular inner groove, one end of which is fixedly connected to the inner bottom wall of the rectangular inner groove, and the other end is fixedly connected to the inner rectangular block. The inner rectangular block is provided with an inner circular hole for the push-up spring to contract. The pressure sensor is installed in the embedded arc groove, and the side linkage is symmetrically arranged on both sides of the rope hook.

5. The early warning device for a tower crane according to claim 4, characterized in that: The side linkage comprises a rectangular side block, a dovetail inclined rod, a side roller, a U-shaped end block, a push spring and a monitor. The rectangular side blocks are symmetrically fixedly installed on both sides of the rope hook, the dovetail inclined rod is limitedly slidably arranged on the rectangular side blocks, and a dovetail vertical groove for the installation of the dovetail inclined rod is opened on the rectangular side block. The side roller is rotatably arranged on the end of the dovetail inclined rod away from the rectangular side block through an inner connecting round rod, and the U-shaped end block is fixedly clamped on the upper end of the rectangular side block. The push spring is arranged in the dovetail vertical groove of the rectangular side block, one end of which is fixedly connected to the rectangular side block, and the other end is fixedly connected to the lower end of the dovetail inclined rod. The monitor is arranged on the inner connecting round rod and the dovetail inclined rod.

6. The early warning device for a tower crane according to claim 5, characterized in that: The monitor includes a sensing support rod, an inner rotating cylinder and an inner center rectangular block. The sensing support rod is fixedly installed on the dovetail inclined rod. One end of the inner rotating cylinder is rotatably installed on the sensing support rod, and the other end extends into the inner connecting circular rod. The inner connecting circular rod is provided with an inner circular groove hole for the inner rotating cylinder to be inserted and installed. One end of the inner center rectangular block is fixedly installed in the inner circular groove hole, and the other end extends into the inner rotating cylinder. The inner rotating cylinder is provided with an inner entry groove adapted to the inner center rectangular block.

7. The early warning device for a tower crane according to claim 6, characterized in that: A warning light controlled by an induction support rod and a pressure sensor is arranged on the upper side of the steel structure configuration block.

8. 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 groove and is fixedly covered with an outer clamping plate.

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