Safety lifting hook capable of being automatically disassembled after lifting steel wire rope is broken

Abstract

A safety hook capable of being automatically disassembled after a lifting steel wire rope is broken comprises a pulley and a hook head, and the pulley and the hook head are connected through a stable connecting assembly so that a heavy object can be kept stable when being lifted; the stable connecting assembly comprises a connecting frame and a balance beam, the connecting frame is connected with the pulley and the balance beam, and the balance beam is connected with the connecting frame and the lifting hook head; the connecting frame is connected with the pulley through a rotating shaft on the pulley connecting lug plate, a safety device is arranged at the joint of the connecting frame and the pulley, and the safety device triggers the safety hook to be disassembled when a rope breaking accident occurs; the safety lifting hook is disassembled, so that a lifting and hoisting mechanism on one side of the lifting equipment without rope breakage can be prevented from being damaged due to excessive overload, metal structures except the lifting hook head are prevented from being damaged due to serious unbalance loading, the caused damage and property loss are reduced, and the safety of the lifting equipment in the using process is also greatly improved.

Description

Technical Field

[0001] The test bench relates to the field of wear and fatigue testing, in particular to wear and fatigue testing and detection of a bulk cargo hopper vehicle bottom door component. Background Art

[0002] In the construction of buildings, wind power and nuclear power, construction cranes are essential lifting equipment for lifting and moving heavy objects. As the lifting weight of lifting equipment increases, the load-bearing capacity of the lifting winch mechanism is also getting higher and higher, so a single lifting winch mechanism is gradually unable to meet the lifting weight requirements of lifting equipment. At present, heavy lifting equipment often uses double lifting winches and other methods to increase the lifting capacity of the equipment.

[0003] Lifting equipment often uses a winch mechanism and a hook to lift heavy objects. During the lifting process, it is difficult to avoid the possibility of a dangerous situation where the lifting wire rope breaks. For lifting equipment using a single hoisting winch mechanism, when the lifting wire rope breaks, the hook will fall off completely. At this time, the entire lifting equipment can be protected by anti-overturning measures. For lifting equipment using double hoisting mechanisms, the lifting wire ropes of the double hoisting mechanisms form a synergistic whole through the hook. When a single hoisting wire rope breaks, the hook will not fall off completely due to the existence of the other hoisting wire rope, and the weight of the hoisted object will be instantly applied to the hoisting mechanism that has not broken. At this time, the hoisting mechanism is in a state of overload of 200% of its carrying capacity, and the hoisting mechanism will be seriously damaged due to the large overload; and if the double hoisting mechanisms of the lifting equipment are distributed side by side, the equipment will also be seriously overloaded, which will also cause serious damage to the bearing structure of the lifting equipment. More seriously, the anti-overturning measures of the whole machine will fail, and the whole machine will overturn sideways, causing more serious damage. After the hoisting winch mechanism and the bearing structure of the lifting equipment are damaged, the anti-overturning measures of the whole machine will also fail to a certain extent, and it will inevitably cause unpredictable damage and property losses such as the overturning of the whole machine. Summary of the invention

[0004] In view of the serious damage to the lifting equipment and the lifting hoisting mechanism caused by the disconnection of a single rope of the double lifting hoisting mechanism, the present invention provides a safety hook that can automatically disintegrate after the lifting wire rope breaks, so as to solve the above problem.

[0005] Technical solution: A safety hook that can automatically disintegrate after a lifting wire rope breaks, comprising a pulley and a hook head, characterized in that the pulley and the hook head are connected by a stable connection assembly so that the heavy object remains stable when being lifted; the stable connection assembly comprises a connecting frame and a balance beam, the connecting frame connects the pulley and the balance beam, and the balance beam connects the connecting frame and the hook head; The connecting frame is connected to the pulley via a rotating shaft on a pulley connecting ear plate. A safety device is arranged at the connection between the connecting frame and the pulley. The safety device triggers the safety hook to disintegrate when a rope breaking accident occurs.

[0006] Furthermore, the number of the balance beam and the connecting frame is two, and the two balance beams are arranged in parallel, the two connecting frames are arranged in parallel, the connecting ear plates of the balance beam are arranged at both ends of the balance beam, and the connecting ear plates of the connecting frame are arranged in the middle of the connecting frame; the setting direction of the balance beam is perpendicular to the connecting frame, and the connecting ear plates at both ends of the balance beam are pin-connected with the connecting ear plates in the middle of the connecting frame.

[0007] Furthermore, half-open grooves are symmetrically arranged at both ends of the connecting frame, the half-open grooves cooperate with the rotating shaft and are located on the rotating shaft, and safety pin holes are arranged at the ends of the groove wings of the half-open grooves.

[0008] Furthermore, the safety device comprises: A safety pin is provided on the pulley connecting lug plate, and the safety pin matches the safety pin hole on the connecting frame; A safety connecting plate, wherein a pin hole is arranged on the safety connecting plate, and the pin hole matches with the safety pin, and the safety connecting plate and the connecting frame are mounted on the safety pin to form a closed structure rotating around the rotating axis; The trigger device is used to trigger the unlocking of the closed structure formed by the safety connecting plate and the connecting frame when the rope is broken.

[0009] Furthermore, the trigger device comprises: A safety bumper, wherein the outer end of the safety connecting plate extends outward horizontally to form a safety bumper; A safety impact plate is arranged at the end of an outer panel of the pulley, and the outer panel of the pulley extends outwardly to tilt to form a safety impact plate. The distance from the end of the safety impact plate to the center of the rotating shaft is greater than the distance from the outer contour of the connecting frame to the center of the rotating shaft, and the distance from the outermost end of the safety impact block to the center of the rotating shaft is greater than the distance from the end of the safety impact plate to the center of the rotating shaft.

[0010] Furthermore, the connecting frame, the safety connecting plate, and the pulley connecting ear plate are double-layer structures, which are sequentially sleeved on the rotating shaft and the safety pin arranged between the double-layer pulley connecting ear plates.

[0011] Furthermore, the connection strength between the safety pin and the pulley connecting ear plate is smaller than the connection strength between the rotating shaft and the pulley ear plate.

[0012] Furthermore, a method for using a lifting wire rope that can automatically disintegrate after the wire rope breaks comprises the following steps: Step 1: The lifting equipment is used to lift the object. The hook head lifts the object. After lifting, the balance beam and the connecting frame are set vertically. The two restrain each other to keep the lifting process stable. Step 2: One of the lifting ropes of the double hoisting winch mechanism breaks, causing the lifting equipment to be suddenly unloaded, and the connecting frame connecting the hook head and the weight to fall; Step 3: The connecting frame on the side where the rope is not broken is tilted upward, so that the safety bumper on the outer side of the safety connecting plate that forms a closed structure together with the connecting frame is also tilted upward; Step 4: The safety impact block hits the safety impact plate, the safety pin breaks, and the closed structure is unlocked.

[0013] Beneficial effects: Due to the adoption of the above technical solution, the present invention has the following advantages compared with the prior art: The present invention designs a safety device by utilizing the eccentric load effect generated after the rope of the double hoisting winch mechanism is broken. When the safety device is triggered, the connecting frame and the pulley on the side where the rope is not broken are automatically disassembled. The disassembly of the safety hook can prevent the hoisting winch mechanism on the side where the rope is not broken from being damaged due to excessive overload, and prevent the metal structure other than the hook head from being seriously eccentrically loaded and damaged, thereby reducing the damage and property loss caused, and greatly improving the safety of the hoisting equipment during use. The I-shaped structure between the connecting frame and the balance beam restrains each other, so that the heavy object remains basically stable during the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main view of the safety hook that can automatically disintegrate after the lifting wire rope breaks; Figure 2 It is a side view of the safety hook that can automatically disintegrate after the lifting wire rope breaks; Figure 3 It is a detail diagram of the safety device of the safety hook which can automatically disintegrate after the lifting wire rope breaks; Figure 4 It is a schematic diagram of the connection frame of the safety hook which can automatically disintegrate after the lifting wire rope breaks; Figure 5 It is a schematic diagram of the working of a safety hook which can automatically disintegrate after the lifting wire rope breaks; In the figure: 1-pulley; 2-hook head; 3-connecting frame; 4-balance beam; 5-rotating axis; 6-semi-open groove; 7-safety pin hole; 8-pulley connecting ear plate; 9-safety pin; 10-safety connecting plate; 11-safety impact block; 12-safety impact plate; 13-outer panel of pulley. DETAILED DESCRIPTION

[0015] Example 1 A safety hook that can automatically disintegrate after a lifting wire rope breaks, comprising a pulley 1 and a hook head 2, wherein the pulley 1 and the hook head 2 are connected by a stable connection assembly, so that the heavy object remains stable when being lifted; the stable connection assembly comprises a connecting frame 3 and a balance beam 4, wherein the connecting frame 3 connects the pulley 1 and the balance beam 4, and the balance beam 4 connects the connecting frame 3 and the hook head 2; A safety device is provided at the connection between the connecting frame 3 and the pulley 1. The connecting frame 3 and the pulley 1 are connected via the rotating shaft 5 on the pulley connecting ear plate 8. When the lifting wire rope breaks, the safety device triggers the safety hook to disintegrate, thereby protecting the lifting equipment from damage.

[0016] The stable connection assembly consists of a balance beam 4 and a connecting frame 3, wherein the balance beam 4 and the connecting frame 3 are both provided in two numbers, and the two balance beams 4 are provided in parallel, and the two connecting frames 3 are provided in parallel, and the connecting ear plates of the balance beam 4 are provided at both ends of the balance beam 4 for connecting with the connecting frame 3, and the connecting ear plates for connecting the connecting frame 3 and the balance beam 4 are provided in the middle of the connecting frame 3; the setting direction of the balance beam 4 is perpendicular to the connecting frame 3, the connecting ear plates at both ends of the balance beam 4 are connected with the connecting ear plate pins in the middle of the connecting frame 3, and the hook head 2 is connected with the connecting ear plate pins in the middle of the balance beam 4; through the connection between the balance beam 4 and the connecting frame 3 mentioned above, the top view after the two are connected presents an I-shaped structure, and the I-shaped structures of the connecting frame 3 and the balance beam 4 restrict each other's relative movement during operation, so that the entire safety hook structure is more stable during operation.

[0017] In order to avoid losses caused by the overturning of the whole machine, a safety device is set at the connection between the connecting frame 3 and the pulley 1. By symmetrically setting half-open grooves 6 at both ends of the connecting frame 3, the half-open grooves 6 are matched with the rotating shaft 5 and are located on the rotating shaft 5. Safety pin holes 7 are set at the ends of the groove wings of the half-open grooves 6 for subsequent fixing. The safety device includes: The safety pin 9 arranged on the pulley connecting ear plate 8 matches the safety pin hole 7 on the connecting frame 3, so that the semi-open groove 6 and the safety pin hole 7 of the connecting frame 3 can just fit the safety pin 9 and the rotating shaft 5 in a harmonious manner; the connection strength between the safety pin 9 and the pulley connecting ear plate 8 is less than the connection strength between the rotating shaft 5 and the pulley connecting ear plate 8, which is conducive to the triggering of the safety device in a critical moment.

[0018] The safety connecting plate 10 is provided with a pin hole, which matches the safety pin 9 , and the connecting frame 3 and the safety connecting plate 10 are sequentially mounted on the safety pin 9 to form a closed structure rotating around the rotating shaft 5 .

[0019] The trigger device is used to trigger the safety device when the rope breaks. The trigger device mainly includes: A safety bumper 11 is formed by horizontally extending outward from the outer end of the safety connecting plate 10; The safety impact plate 12 is arranged at the end of the outer panel 13 of the pulley, and the outer panel 13 of the pulley continues to extend outward at its end to form the safety impact plate 12. The distance from the end of the safety impact plate 12 to the center of the rotating shaft 5 is greater than the distance from the outer contour of the connecting frame 3 to the center of the rotating shaft 5, ensuring that the connecting frame 3 does not touch the safety impact plate 12 when the connecting frame 3 rotates around the rotating shaft 5; the distance from the outermost end of the safety impact block 11 to the center of the rotating shaft 5 is greater than the distance from the end of the safety impact plate 12 to the center of the rotating shaft 5, ensuring that the safety impact block 11 can be blocked by the safety impact plate 12 after touching the safety impact plate 12, and the connecting frame 3 will not continue to rotate around the rotating shaft 5.

[0020] When the double lifting winch mechanism is working, the two lifting ropes pass through the pulley 1 to lift the safety hook with the weight. During the lifting process, when the weight shakes, the I-shaped structure composed of the connecting frame 3 and the balance beam 4 can stabilize it. When the lifting rope on one side breaks due to the lifting of the weight or other sudden unloading, the weight falls suddenly, causing the connecting frame 3 to tilt up. Since the lifting rope on the tilted side is not broken, an eccentric load effect is generated. The tilting of the connecting frame 3 drives the safety block 11 on the outer side of the safety connecting plate 10 that forms a closed structure together with the connecting frame 3 to tilt up together. Since the distance from the outermost end of the safety block 11 to the center of the rotating shaft 5 is greater than the distance from the end of the safety block 12 to the center of the rotating shaft 5, the safety block 11 violently hits the safety block 12, which makes the connection strength between the safety pin 9 and the pulley connecting ear plate 8 less than the connection strength between the rotating shaft 5 and the pulley connecting ear plate 8 The connecting frame 3 is broken, thereby unlocking the closed structure formed by the connecting frame 3 and the safety connecting plate 10. The connecting frame 3 connected to the hook head 2, the balance beam 4 and the pulley 1 on the broken rope side fall down and separate from the lifting equipment, thereby avoiding damage to the lifting equipment.

[0021] Example 2 As a further preferred embodiment of the technical solution of the present invention, the difference from Embodiment 1 is that, in order to make the connection structure more secure, the connecting frame 3, the safety connecting plate 10, and the pulley connecting ear plate 8 are all double-layer structures, which are sequentially mounted on the rotating shaft 5 and the safety pin 9 arranged between the double-layer pulley connecting ear plates 8.

[0022] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A safety hook that can automatically disintegrate after the lifting wire rope breaks, comprising a pulley and a hook head, characterized in that: The pulley and the hook head are connected by a stable connection assembly to keep the weight stable when it is lifted; the stable connection assembly includes a connecting frame and a balance beam, the connecting frame connects the pulley and the balance beam, and the balance beam connects the connecting frame and the hook head; The connecting frame is connected to the pulley via a rotating shaft on a pulley connecting ear plate. A safety device is arranged at the connection between the connecting frame and the pulley. The safety device triggers the safety hook to disintegrate when a rope breaking accident occurs.

2. A safety hook that can automatically disintegrate after the lifting wire rope breaks according to claim 1, characterized in that: The number of the balance beam and the connecting frame is two, and the two balance beams are arranged in parallel, the two connecting frames are arranged in parallel, the connecting ear plates of the balance beam are arranged at both ends of the balance beam, and the connecting ear plates of the connecting frame are arranged in the middle of the connecting frame; the setting direction of the balance beam is perpendicular to the connecting frame, and the connecting ear plates at both ends of the balance beam are pin-connected with the connecting ear plate in the middle of the connecting frame.

3. A safety hook that can automatically disintegrate after the lifting wire rope breaks according to claim 1, characterized in that: The two ends of the connecting frame are symmetrically provided with half-open grooves, the half-open grooves cooperate with the rotating shaft and are located on the rotating shaft, and the ends of the groove wings of the half-open grooves are provided with safety pin holes.

4. A safety hook that can automatically disintegrate after the lifting wire rope breaks according to claim 3, characterized in that: The safety device comprises: A safety pin is provided on the pulley connecting lug plate, and the safety pin matches the safety pin hole on the connecting frame; A safety connecting plate, wherein a pin hole is arranged on the safety connecting plate, and the pin hole matches with the safety pin, and the safety connecting plate and the connecting frame are mounted on the safety pin to form a closed structure rotating around the rotating axis; The trigger device is used to trigger the unlocking of the closed structure formed by the safety connecting plate and the connecting frame when the rope is broken.

5. A safety hook that can automatically disintegrate after the lifting wire rope breaks according to claim 4, characterized in that: The trigger device comprises: A safety bumper, wherein the outer end of the safety connecting plate extends outward horizontally to form a safety bumper; A safety impact plate is arranged at the end of an outer panel of the pulley, and the outer panel of the pulley extends outwardly to tilt to form a safety impact plate. The distance from the end of the safety impact plate to the center of the rotating shaft is greater than the distance from the outer contour of the connecting frame to the center of the rotating shaft, and the distance from the outermost end of the safety impact block to the center of the rotating shaft is greater than the distance from the end of the safety impact plate to the center of the rotating shaft.

6. A safety hook that can automatically disintegrate after the lifting wire rope breaks according to claim 4, characterized in that: The connecting frame, the safety connecting plate and the pulley connecting ear plate are double-layer structures, and are sequentially sleeved on the rotating shaft and the safety pin arranged between the double-layer pulley connecting ear plates.

7. A safety hook that can automatically disintegrate after the lifting wire rope breaks according to claim 5, characterized in that: The connection strength between the safety pin and the pulley connecting ear plate is smaller than the connection strength between the rotating shaft and the pulley ear plate.

8. The method for using a lifting wire rope that can automatically disintegrate after the wire rope breaks according to claim 5, characterized in that: Step 1: The lifting equipment is used to lift the object. The hook head lifts the object. After lifting, the balance beam and the connecting frame are set vertically. The two restrain each other to keep the lifting process stable. Step 2: One of the lifting ropes of the double hoisting winch mechanism breaks, causing the lifting equipment to be suddenly unloaded, and the connecting frame connecting the hook head and the weight to fall; Step 3: The connecting frame on the side where the rope is not broken is tilted upward, so that the safety bumper on the outer side of the safety connecting plate that forms a closed structure together with the connecting frame is also tilted upward; Step 4: The safety impact block hits the safety impact plate, the safety pin breaks, and the closed structure is unlocked.

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