Lanyard emergency device, method of using a lanyard emergency device, and crane

Abstract

The present application belongs to the technical field of engineering machinery, and particularly relates to a waist rope emergency device, a use method of the waist rope emergency device and a crane. The waist rope emergency device is used for the crane, and the crane comprises a main arm frame and a main pull plate. The waist rope emergency device comprises: a connecting pull plate assembly, which comprises a first connecting end, a second connecting end and a third connecting end connected with the main pull plate; an auxiliary sling mechanism, one end of which is connected with the first connecting end, and the other end of which is connected with the main arm frame, the auxiliary sling mechanism being used for driving the main pull plate to swing and reset towards the main arm frame; and an emergency sling, one end of which is connected with the second connecting end, and the other end of which is used for being connected with the main arm frame after the main pull plate swings and resets. The waist rope emergency device can connect the main pull plate and the main arm frame through the emergency sling when the waist rope fails, so that the main arm frame of the crane can perform emergency operation.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery technology, specifically relating to a waist rope emergency device, a method of using the waist rope emergency device, and a crane. Background Technology

[0002] Wind turbine installation operations have strict safety limits on operating wind speeds. Therefore, cranes often need to be idle for extended periods during the construction cycle, waiting for wind speed windows that meet the operating standards. During the idle period, due to multiple constraints such as site space limitations, operational efficiency control requirements, and equipment and material safety, crawler cranes usually cannot fully lower their booms to the ground. At the same time, wind power installations commonly employ ultra-long main booms or long booms with superlifts, meaning that in the idle state, cranes often maintain an empty hook and a large boom elevation angle.

[0003] In the aforementioned empty hook, high-angle parking state, the boom tie plate system is under low stress. When encountering wind loads such as gusts or crosswinds, the relaxed tie plate is prone to large-scale reciprocating swaying, resulting in continuous alternating loads at the connection lugs between the waist rope support and the tie plate. Long-term repeated alternating loads can cause metal fatigue damage to the connection lugs of the waist rope, and in severe cases, even waist rope breakage. Waist rope failure will directly prevent the crane boom from performing normal boom-lowering operations, not only delaying the wind power installation progress but also potentially causing component falls, boom instability, and other safety risks, threatening the safety of equipment and personnel at the construction site. Summary of the Invention

[0004] The purpose of this invention is to provide a waist rope emergency device, a method for using the waist rope emergency device, and a crane, so as to solve the problem that cranes are difficult to operate in emergency situations after the waist rope fails in the prior art.

[0005] To achieve the above objectives, the present invention provides a waist rope emergency device for a crane, the crane including a main boom and a main tie plate, the waist rope emergency device comprising: A connecting plate assembly includes a first connecting end, a second connecting end, and a third connecting end connected to the main connecting plate; The auxiliary sling mechanism is connected at one end to the first connecting end and at the other end to the main boom. The auxiliary sling mechanism is used to drive the main pull plate to swing and reset towards the main boom. The emergency sling has one end connected to the second connecting end and the other end used to connect to the main boom after the main pull plate swings and resets.

[0006] In some embodiments, the auxiliary sling mechanism includes: a first auxiliary sling, a first end of which is connected to a first connecting end; a second auxiliary sling, a first end of which is connected to the main boom; and a tension drive assembly, the two ends of which are respectively connected to the second ends of the first and second auxiliary slings, the tension drive assembly being used to provide tension to swing the main boom plate back to its original position.

[0007] In some embodiments, the pull drive assembly is a hand-operated hoist assembly, which includes two pull connection ends, which are respectively connected to the second end of the first auxiliary sling and the second end of the second auxiliary sling.

[0008] In some embodiments, the connecting pull plate assembly includes: a three-pulling plate module, which is sleeved on the main pull plate and has a first hinge hole; and a double-pulling plate module, which has a second hinge hole corresponding to the first hinge hole, with the first connecting end and the second connecting end located at the end of the double-pulling plate module away from the second hinge hole.

[0009] In some embodiments, the main pull plate includes two pull plate members arranged in parallel and spaced apart. The three-pull plate module includes: three stacked three-hole pull plates, which are arranged in parallel and spaced apart. Each three-hole pull plate has a first hinge hole, a third hinge hole, and a fourth hinge hole on its surface. The first hinge hole, the third hinge hole, and the fourth hinge hole are spaced apart. The two pull plate members are inserted between any two adjacent three-hole pull plates. A first pin passes through the three third hinge holes in sequence. A second pin passes through the three fourth hinge holes in sequence. The pull plate members are located between the third hinge holes and the fourth hinge holes. The first pin and the second pin are used to sleeve the three three-hole pull plates onto the pull plate members.

[0010] In some embodiments, the pull plate component includes an integrally formed extension section and a pin connecting section, a baffle is provided on the extension section, and three three-hole pull plates are sleeved on the extension section between the baffle and the pin connecting section.

[0011] In some embodiments, the main boom is provided with a waist rope connector for connecting the waist rope, and the emergency sling includes: a rope body, a first end of the rope body connected to a second connecting end, and a second end of the rope body sleeved on the waist rope connector.

[0012] A second aspect of the present invention provides a method for using a waist rope emergency device, applied to the aforementioned waist rope emergency device. The method includes: in the event of a failure of the crane's waist rope, connecting a third connecting end to the main pull plate; connecting one end of an auxiliary sling mechanism to a first connecting end; connecting the other end of the auxiliary sling mechanism to the main boom; controlling the retraction of the auxiliary sling mechanism to allow the main pull plate to swing back towards the main boom; connecting one end of an emergency sling to a second connecting end, and connecting the other end of the emergency sling to the main boom; and dismantling the auxiliary sling mechanism.

[0013] In some embodiments, the auxiliary sling mechanism includes a first auxiliary sling, a second auxiliary sling, and a tension drive assembly. A first end of the first auxiliary sling is connected to a first connecting end, and a first end of the second auxiliary sling is connected to the main boom. Controlling the retraction of the auxiliary sling mechanism to allow the main boom plate to swing back towards the main boom includes: connecting both ends of the tension drive assembly to the second ends of the first and second auxiliary slings respectively; outputting tension through the tension drive assembly to retract the first or second auxiliary sling; and controlling the tension drive assembly to keep the first and second auxiliary slings stationary after the main boom plate has reset.

[0014] A third aspect of the present invention provides a crane including the aforementioned waist rope emergency device.

[0015] In the above technical solution, the waist rope emergency device includes a connecting pull plate assembly, an auxiliary sling mechanism, and an emergency sling. The connecting pull plate assembly includes three connecting ends, with the third connecting end connected to the main pull plate. One end of the auxiliary sling mechanism is connected to the first connecting end, and the other end of the auxiliary sling is connected to the main boom. When the waist rope fails, the pull plate will shift its position due to gravity. The auxiliary sling mechanism can drive the main pull plate to swing back to the main boom. Subsequently, both ends of the emergency sling are connected to the second connecting end and the main boom, so as to connect the main pull plate and the main boom through the emergency sling. This allows the main pull plate to continue operating even when the waist rope fails, preventing the main boom from being unable to lower due to waist rope failure and the difficulty of waist rope maintenance.

[0016] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a schematic diagram of a crane structure in normal operating condition according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a crane structure under the condition of rope failure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the waist rope emergency device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of a first application scenario of the waist rope emergency device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of a second application scenario of the waist rope emergency device provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the connecting pull plate assembly provided according to an embodiment of the present invention; Figure 7 A flowchart illustrating the method of using the waist rope emergency device provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures 100 main boom 101 Waist rope connector 200 main pull plate 201 Pull plate component 2011 extension 2012 Pin Connection Section 202 baffle 300 Waist Rope 11 Three-Plate Module 111 Three-hole pull plate 112 Second hinge hole 113 Third hinge hole 114 Fourth hinge hole 12 Double-Pull Plate Module 21 First Auxiliary Sling 22 Second Auxiliary Sling 23 Tension drive assembly 30 Emergency Slings 31 rope body 32 Shackles Detailed Implementation The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] The following description, with reference to the accompanying drawings, describes the waist rope emergency device according to the present invention, its method of use, and a crane. For example... Figure 1 The diagram shown is a schematic representation of a crane structure in normal operating condition using the waist rope 300 provided according to an embodiment of the present invention; Figure 2 The diagram shown is a schematic representation of a crane structure in the failure state of the waist rope 300 according to an embodiment of the present invention. The main tie plate 200 of the crane is composed of multiple tie plate members 201 that are hinged end to end. To optimize its stress structure, a waist rope 300 is connected between the main tie plate 200 and the main boom 100 to prevent the main tie plate 200 from excessively swaying due to its own weight or wind load under high elevation angle conditions. Under normal operation of the waist rope 300, such as... Figure 1As shown, the waist rope 300 causes the main tie plate 200 to deviate from the main boom 100 at a certain angle to ensure that the waist rope 300 remains taut, thereby effectively restraining the swing amplitude of the main tie plate 200. If one of the waist ropes 300 breaks and fails, such as... Figure 2 As shown, the main tension plate 200, without its original constraint, may deflect or even jam, making it impossible to perform normal boom-climbing operations. Meanwhile, the waist rope 300 is typically made of metal, making it bulky and heavy, and difficult to transport and replace during high-altitude operations.

[0020] To address the above problems, embodiments of the present invention provide a waist rope emergency device, such as... Figure 3 The diagram shown is a structural schematic of a waist rope emergency device provided according to an embodiment of the present invention; as shown Figure 4 The diagram shown is a schematic representation of a first application scenario of the waist rope emergency device provided according to an embodiment of the present invention; as follows: Figure 5 The diagram shown illustrates a second application scenario of the waist rope emergency device provided according to an embodiment of the present invention. The waist rope emergency device includes: The connecting pull plate assembly includes a first connecting end, a second connecting end, and a third connecting end connected to the main pull plate 200; The auxiliary sling mechanism is connected at one end to the first connecting end and at the other end to the main boom 100. The auxiliary sling mechanism is used to drive the main pull plate 200 to swing and reset towards the main boom 100. The emergency sling 30 has one end connected to the second connecting end and the other end used to connect to the main boom 100 after the main pull plate 200 swings and resets.

[0021] The third connecting end of the connecting plate assembly is connected to the main connecting plate 200. The first and second connecting ends of the connecting plate assembly are respectively connected to the auxiliary lifting mechanism and the emergency lifting sling 30. The auxiliary lifting mechanism connects the main connecting plate 200 and the main boom 100 and transmits tension to the main connecting plate 200, causing the main connecting plate 200 to swing back towards the main boom 100. Typically, the crane is equipped with two waist ropes 300, with their ends connected to the connecting plate beam and the boom beam, respectively. Under normal operating conditions, the connecting plate beam and the boom beam are parallel. Both waist ropes 300 connect the main boom 100 and the main connecting plate 200. When one waist rope 300 fails, one side of the connecting plate beam will shift, creating an angle between the connecting plate beam and the boom beam. Pulling the connecting plate by the auxiliary lifting mechanism resets the connecting plate beam, restoring the connecting plate beam and the boom beam to their parallel state. After the main tie plate 200 is reset, the emergency sling 30 is connected to the second connecting end and the main boom 100, thus re-establishing a stable connection between the main tie plate 200 and the main boom 100. This replaces the function of the failed waist rope 300, ensuring the crane can continue to perform boom-lowering or other necessary operations. After connecting the emergency sling 30, the auxiliary sling mechanism can be removed to prevent collisions with other components while suspended. The emergency sling 30 can be made of high-strength flexible material, possessing sufficient load-bearing capacity and fatigue resistance, and can safely transfer loads under temporary working conditions. After emergency handling is completed, the failed waist rope 300 can be replaced or repaired as appropriate, without immediate operation in complex high-altitude environments, significantly improving construction safety and work efficiency.

[0022] In one embodiment, such as Figure 3 and Figure 4 As shown, the auxiliary sling mechanism includes a first auxiliary sling 21, a second auxiliary sling 22, and a tension drive assembly 23. The first end of the first auxiliary sling 21 is connected to a first connecting end, and the first end of the second auxiliary sling 22 is connected to the main boom 100. The two ends of the tension drive assembly 23 are respectively connected to the second ends of the first auxiliary sling 21 and the second auxiliary sling 22. The tension drive assembly 23 provides tension to swing the main pull plate 200 back to its reset position. Using the aforementioned tension drive assembly 23, the first auxiliary sling 21 or the second auxiliary sling 22 can be driven to produce relative displacement, thereby smoothly pulling the main pull plate 200 to the reset position through a linkage effect. The tension drive assembly 23 can be a hand-operated hoist assembly, an electric winch, or a hydraulic tensioning device. Its output tension can be adjusted according to actual working conditions to ensure that the reset process is controllable and avoids impact loads on the structure. After the main tension plate 200 completes its reset, the tension drive assembly 23 can lock its current position, maintain the tension of the auxiliary sling, prevent the main tension plate 200 from shifting again due to external disturbances, and provide stable operating conditions for the subsequent installation of the emergency sling 30.

[0023] In one embodiment, the tension drive assembly 23 is a hand-operated hoist assembly, which includes two tension connection ends connected to the second end of the first auxiliary sling 21 and the second end of the second auxiliary sling 22, respectively. The hand-operated hoist assembly is compact and easy to operate, suitable for high-altitude or space-constrained working environments, and can achieve precise tension control without an external power source. By manually pulling the chain back and forth, the auxiliary slings can be gradually tightened, allowing the main tension plate 200 to smoothly return to the main boom 100 direction, effectively avoiding structural impact or instability caused by sudden force. Furthermore, the hand-operated hoist assembly typically has a self-locking function, automatically maintaining the current tension state when operation stops, ensuring the stability of the main tension plate 200 during the return process, facilitating the subsequent installation and fixing of the emergency sling 30.

[0024] In one embodiment, such as Figure 6 The diagram shows a structural schematic of a connecting pull plate assembly according to an embodiment of the present invention. The connecting pull plate assembly includes a three-pulling-plate module 11 and a double-pulling-plate module 12. The three-pulling-plate module 11 is sleeved on the main pull plate 200 and has a first hinge hole (not shown in the figure). The double-pulling-plate module 12 has a second hinge hole 112 corresponding to the first hinge hole. The first connecting end and the second connecting end are located at the end of the double-pulling-plate module 12 away from the second hinge hole 112. The double-pulling-plate module 12 is hinged to the three-pulling-plate module 11 via a pin, forming a stable connection structure that ensures reliable load transmission even when the main pull plate 200 is subjected to changes in force. This structural design not only facilitates quick installation and disassembly but also adapts to the connection requirements of main pull plates 200 of different specifications, improving the versatility and field adaptability of the device. The double-pull plate module 12 has a first connecting end and a second connecting end, which can be used to connect with the first auxiliary sling 21 and the emergency sling 30 respectively, so as to quickly construct a temporary force path after the waist rope 300 fails.

[0025] In one embodiment, such as Figure 6As shown, the main pull plate 200 includes two pull plate components 201 arranged in parallel and spaced apart. The three-pull plate module 11 includes three stacked three-hole pull plates 111, a first pin, and a second pin. The three three-hole pull plates 111 are arranged in parallel and spaced apart. Each three-hole pull plate 111 has a first hinge hole, a third hinge hole 113, and a fourth hinge hole 114 on its surface. The first hinge hole, the third hinge hole 113, and the fourth hinge hole 114 are spaced apart. The two pull plate components 201 are inserted between any two adjacent three-hole pull plates 111. The first pin passes through the three third hinge holes 113 in sequence, and the second pin passes through the three fourth hinge holes 114 in sequence. The pull plate component 201 is located between the third hinge holes 113 and the fourth hinge holes 114. The first pin and the second pin are used to sleeve the three three-hole pull plates 111 onto the pull plate component 201. This structure, through the cooperation of multiple layers of three-hole pull plates 111 with the first and second pins, forms a stable sleeve relationship, effectively dispersing the local stress of the main pull plate 200 during the stress process. At the same time, the stacked layout of the three-hole pull plates 111 enhances the overall strength of the connecting pull plate assembly, enabling the three-hole pull plates 111 to stably transmit the load when the auxiliary lifting strap applies tension, ensuring the reliability and accuracy of the main pull plate 200's reset action.

[0026] In one embodiment, such as Figure 6 As shown, the pull plate component 201 includes an integrally formed extension section 2011 and a pin connecting section 2012. A baffle 202 is provided on the extension section 2011, and three three-hole pull plates 111 are sleeved on the extension section 2011 between the baffle 202 and the pin connecting section 2012. The baffle 202 serves as a limit to prevent the three-hole pull plates 111 from sliding axially on the pull plate component 201, ensuring that the connecting pull plate assembly remains stable under stress. The pin connecting section 2012 is used to hinge with another pull plate component 201, and can also be used to connect the waist rope 300. In addition, the three three-hole pull plates 111 can slide freely for a small range along the extension section 2011 between the baffle 202 and the pin connecting section 2012, so that the main boom 100 can adapt to the relative displacement between the main pull plate 200 and the main boom 100 during luffing motion, avoiding structural interference or stress concentration caused by rigid constraints.

[0027] In one embodiment, the main boom 100 is equipped with a waist rope connector 101 for connecting the waist rope 300. The emergency sling 30 includes a rope body 31, with a first end connected to a second connecting end, and the second end of the rope body 31 sleeved on the waist rope connector 101. When the waist rope 300 is functioning properly, the waist rope connector 101 can effectively connect the waist rope 300. When the waist rope 300 fails, the second end of the rope body 31 of the emergency sling 30 can be quickly sleeved on the waist rope connector 101 for temporary replacement. This design fully utilizes the existing waist rope 300 connection structure, eliminating the need for additional connection points and simplifying emergency operation procedures. The rope body 31 can be made of high-strength synthetic fiber or steel wire rope, possessing good flexibility and tensile strength, and can reliably bear the load transmitted by the main tension plate 200 under complex working conditions. Simultaneously, the second end of the rope body 31 can be equipped with a shackle 32, facilitating single-person operation in high-altitude environments and improving emergency response efficiency and safety.

[0028] In one embodiment, such as Figure 7 The diagram shows a flowchart of a method for using a waist rope emergency device according to an embodiment of the present invention. The method of using the waist rope emergency device is applied to the aforementioned waist rope emergency device and includes: S101, in the event that the crane's waist rope 300 fails, connect the third connecting end to the main pull plate 200; S102, connect one end of the auxiliary sling mechanism to the first connecting end; S103, connect the other end of the auxiliary sling mechanism to the main boom 100; S104, control the retraction of the auxiliary sling mechanism so that the main pull plate 200 swings back toward the main boom 100; S105, connect one end of the emergency sling 30 to the second connecting end, and connect the other end of the emergency sling 30 to the main boom 100; S106, Remove the auxiliary lifting mechanism.

[0029] When the crane's waist rope 300 fails, the operator can use other aerial work platforms to reach the vicinity of the connection point between the main tie plate 200 and the waist rope 300. The operator connects the third connecting end of the connecting tie plate assembly to the main tie plate 200 to form a stable connection. Then, one end of the auxiliary sling mechanism is reliably fixed to the first connecting end of the connecting tie plate assembly, ensuring a secure connection without the risk of slippage. Next, the other end of the auxiliary sling mechanism is connected to a predetermined connection point on the main boom 100. This connection point can be the waist rope connector 101 or other structural parts with sufficient strength. After the connection is completed, the tension drive assembly 23 is activated to gradually apply tension, causing the auxiliary sling mechanism to slowly retract, thereby pulling the main tie plate 200 to swing smoothly towards the main boom 100 until it returns to its reset position. During this process, the operator must observe the movement of the main tie plate 200 to prevent excessive or rapid movement that could lead to structural abnormalities. After the main support plate 200 is reset, the operator fixes one end of the emergency sling 30 to the second connecting end of the connecting plate assembly, and the other end is fitted and locked onto the waist rope connector 101 of the main boom 100, forming a stable temporary force path. After confirming that the emergency sling 30 is under normal force, the connection between the auxiliary sling mechanism and the first connecting end and the main boom 100 is released, and the entire mechanism is dismantled to eliminate the safety hazards caused by the suspended object, thus completing the entire emergency response process.

[0030] The above-described method of using the emergency sling device can effectively address the risk of operational interruption caused by the sudden failure of the sling 300, and avoid structural jamming or overturning hazards caused by the uncontrolled deflection of the main tie plate 200. Through the coordinated action of the auxiliary sling mechanism and the emergency sling 30, the force balance between the main tie plate 200 and the main boom 100 can be quickly restored without relying on external large equipment, ensuring that the crane still has basic luffing and boom-lowering capabilities in an emergency.

[0031] In one embodiment, the auxiliary sling mechanism includes a first auxiliary sling 21, a second auxiliary sling 22, and a tension drive assembly 23. The first end of the first auxiliary sling 21 is connected to a first connecting end, and the first end of the second auxiliary sling 22 is connected to the main boom 100. Controlling the retraction of the auxiliary sling mechanism to allow the main boom 200 to swing and reset towards the main boom 100 includes: connecting both ends of the tension drive assembly 23 to the second ends of the first auxiliary sling 21 and the second auxiliary sling 22 respectively; outputting tension through the tension drive assembly 23 to retract either the first auxiliary sling 21 or the second auxiliary sling 22; and controlling the tension drive assembly 23 after the main boom 200 has reset to keep the first auxiliary sling 21 and the second auxiliary sling 22 stationary. During the output of tension, the tension drive assembly 23 can dynamically adjust the magnitude and speed of the applied force according to the actual deflection angle of the main boom 200 to ensure a smooth and controllable reset action. The operator observes the relative position of the main tension plate 200 and the boom connecting beam to determine whether they have returned to a parallel state, and thus decides whether to terminate the tension output. With the tension drive assembly 23 kept taut, the emergency sling 30 can be installed using a dedicated hook or quick-lock, achieving a reliable connection without additional tools. The entire process can be operated independently by a single person in a confined space, significantly reducing the complexity and safety risks of high-altitude collaborative operations.

[0032] In one embodiment, a crane is provided, including the aforementioned emergency rope device. Specifically, the crane is a crawler crane.

[0033] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waist rope emergency device, characterized in that, For use in a crane, the crane including a main boom (100) and a main tie plate (200), the waist rope emergency device including: The connecting pull plate assembly includes a first connecting end, a second connecting end, and a third connecting end connected to the main pull plate (200); An auxiliary sling mechanism is connected at one end to the first connecting end and at the other end to the main boom (100). The auxiliary sling mechanism is used to drive the main pull plate (200) to swing and reset towards the main boom (100). An emergency sling (30) is connected at one end to the second connecting end and at the other end to the main boom (100) after the main pull plate (200) swings and resets.

2. The waist rope emergency device according to claim 1, characterized in that, The auxiliary sling mechanism includes: The first auxiliary sling (21) is connected at its first end to the first connecting end; The second auxiliary sling (22) has its first end connected to the main boom (100); The tension drive assembly (23) has two ends connected to the second ends of the first auxiliary sling (21) and the second auxiliary sling (22), respectively. The tension drive assembly (23) is used to provide tension to swing the main pull plate (200) back to its original position.

3. The waist rope emergency device according to claim 2, characterized in that, The tension drive assembly (23) is a hand-operated hoist assembly, which includes two tension connection ends, which are respectively connected to the second end of the first auxiliary sling (21) and the second end of the second auxiliary sling (22).

4. The waist rope emergency device according to claim 1, characterized in that, The connecting plate assembly includes: Three-plate module (11), the three-plate module (11) is sleeved on the main pull plate (200) and has a first hinge hole; The double-pull plate module (12) has a second hinge hole (112) corresponding to the first hinge hole. The first connecting end and the second connecting end are located at the end of the double-pull plate module (12) away from the second hinge hole (112).

5. The waist rope emergency device according to claim 4, characterized in that, The main pull plate (200) includes two pull plate components (201) arranged in parallel and spaced apart, and the three-pull plate module (11) includes: Three stacked three-hole pull plates (111) are arranged in parallel and spaced apart. Each three-hole pull plate (111) has a first hinge hole, a third hinge hole (113) and a fourth hinge hole (114) on its surface. The first hinge hole, the third hinge hole (113) and the fourth hinge hole (114) are spaced apart. Two pull plate members (201) are inserted between any two adjacent three-hole pull plates (111). The first pin passes through the three third hinge holes (113) in sequence. The second pin passes through the three fourth hinge holes (114) in sequence. The pull plate (201) is located between the third hinge hole (113) and the fourth hinge hole (114). The first pin and the second pin are used to attach the three three-hole pull plates (111) to the pull plate (201).

6. The waist rope emergency device according to claim 5, characterized in that, The pull plate component (201) includes an integrally formed extension section (2011) and a pin shaft connecting section (2012). A baffle (202) is provided on the extension section (2011), and three three-hole pull plates (111) are sleeved on the extension section (2011) between the baffle (202) and the pin shaft connecting section (2012).

7. The waist rope emergency device according to any one of claims 1 to 6, characterized in that, The main boom (100) is provided with a waist rope connector (101) for connecting the waist rope (300), and the emergency sling (30) includes: The first end of the rope (31) is connected to the second connecting end, and the second end of the rope (31) is sleeved on the waist rope connector (101).

8. A method of using a waist rope emergency device, characterized in that, The method of using the waist rope emergency device according to any one of claims 1 to 7 includes: In the event of failure of the crane's waist rope (300), the third connecting end is connected to the main pull plate (200); Connect one end of the auxiliary sling mechanism to the first connecting end; Connect the other end of the auxiliary sling mechanism to the main boom (100); Control the retraction of the auxiliary sling mechanism so that the main pull plate (200) swings back toward the main boom (100); Connect one end of the emergency sling (30) to the second connecting end, and connect the other end of the emergency sling (30) to the main boom (100); Remove the auxiliary sling mechanism.

9. The method of using the waist rope emergency device according to claim 8, characterized in that, The auxiliary sling mechanism includes a first auxiliary sling (21), a second auxiliary sling (22), and a tension drive assembly (23). The first end of the first auxiliary sling (21) is connected to the first connecting end, and the first end of the second auxiliary sling (22) is connected to the main boom (100). Controlling the retraction of the auxiliary sling mechanism to swing the main pull plate (200) toward the main boom (100) to reset includes: The two ends of the tension drive assembly (23) are respectively connected to the second end of the first auxiliary sling (21) and the second end of the second auxiliary sling (22); The tension drive assembly (23) outputs tension to drive the first auxiliary sling (21) or the second auxiliary sling (22) to retract; After the main pull plate (200) is reset, the tension drive assembly (23) is controlled to keep the first auxiliary sling (21) and the second auxiliary sling (22) stationary.

10. A crane, characterized in that, include: The crane includes the waist rope emergency device as described in any one of claims 1 to 7; Main boom (100); Main pull plate (200).

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