CN-121980736-A - Emergency disengagement verification method

CN121980736ACN 121980736 ACN121980736 ACN 121980736ACN-121980736-A

Abstract

An emergency detachment verification method comprises the following steps of S1, fixing at least one motion reference unit on a lifting device to be tested to collect motion data of the lifting device to be tested, hanging a target weight on a sling of the lifting device to be tested, and hanging at least one detachable weight with a detachment device directly or indirectly on the sling, and S2, triggering the detachment device at least once after the target weight and the detachable weight are pulled up by the lifting device to be tested, so that the tension born by the sling is changed. According to the invention, the separation of the separable weight is controlled, so that different scenes of salvaging the weight by using the crane device on the sea surface are simulated, and the emergency separation performance of the crane device is verified in a non-marine environment.

Inventors

LUO GUOSHAN
MA QIANYUN
LIANG YUANZHEN
LIN YUNZHI
LI XINXIAN
Ma Dimo
GUO ANLUO

Assignees

中国船舶集团华南船机有限公司

Dates

Publication Date: 20260505
Application Date: 20251205

Claims (7)

1. An emergency detachment verification method is characterized by comprising the following steps: Step S1, fixing at least one motion reference unit on a lifting device to be detected so as to collect motion data of the lifting device to be detected; and S2, after the target weight and the detachable weight are lifted by using the lifting device to be tested, triggering the detachment device at least once to change the tension born by the sling.
2. The emergency detachment verification method of claim 1, wherein: The motion data of the lifting device to be tested, which are collected by the motion reference unit, comprise attitude angles and translational motions of the lifting device to be tested.
3. The emergency detachment verification method of claim 1, wherein the detachable weights comprise a first detachable weight and a second detachable weight, and wherein step S2 comprises the following: Step S2.1, continuously increasing the tension output by the lifting device to be tested when the tension output by the lifting device to be tested is not greater than the sum of the first detachable weight, the second detachable weight, the target weight and the gravity applied by the target weight; And step S2.2, triggering a disengaging device of the second disengageable weight to disengage the second disengageable weight from the sling after the pulling force output by the hoisting device to be detected is greater than the sum of the weights borne by the first disengageable weight, the second disengageable weight and the target weight.
4. The emergency exit verification method according to claim 3, wherein the step S2 further comprises the following steps: And S2.3a, after the second detachable weight is detached from the sling, adjusting the pulling force output by the lifting device to be tested to be larger than the weight of the target weight and smaller than the sum of the weights of the first detachable weight and the target weight, and triggering a detachment device of the first detachable weight to detach the first detachable weight.
5. The emergency exit verification method according to claim 3, wherein the step S2 further comprises the following steps: and S2.3b, after the second detachable weight is detached from the sling, adjusting the pulling force output by the lifting device to be tested to be larger than the weight of the target weight and smaller than the sum of the weights of the first detachable weight and the target weight, and triggering the detachment device of the first detachable weight, wherein the first detachable weight is not detached from the sling, but the weight of the first detachable weight is continuously reduced until the weight is not changed.
6. The method of emergency release verification according to claim 4 or 5, further comprising step S3 of adding a buoyancy compensating weight to the sling after triggering the release means of the first releasable weight.
7. The emergency detachment verification method of claim 1, wherein: The disengaging means comprises a unhooking device and a shackle.

Description

Emergency disengagement verification method Technical Field The invention relates to the technical field of ocean engineering cranes, in particular to an emergency detachment verification method. Background In the field of ocean engineering, the salvage and recovery of submarine weights such as wreck, deep sea equipment, engineering components and the like are important, on one hand, the submerged weights in key sea areas such as a channel, an anchor ground and the like can threaten the navigation safety of ships and even cause ocean pollution, and on the other hand, the recovery of high-value equipment and available resources can reduce economic loss and clear obstacles for the subsequent ocean engineering. The operation usually needs to hoist hundreds of tons of heavy objects from the seabed to a transport ship through a shipborne hoisting device, but practical operation faces significant challenges in that for heavy objects of deep sediment, the hoisting required pulling force is far greater than the gravity of the heavy objects, the hoisting device is easily damaged due to reactive force due to excessive output pulling force, meanwhile, the heavy objects are stressed in a complex manner due to water flow disturbance, the heavy objects possibly fall off suddenly in the hoisting process, and strong reactive impact can be generated on the hoisting device. Therefore, the emergency detachment test is carried out on the hoisting device before the hoisting device is actually put into use so as to verify the reliability of the hoisting device, and the emergency detachment test has important practical significance for ensuring the life safety of staff and ensuring that the hoisting device can work normally under most conditions. However, the problems of great operation difficulty, high cost, poor risk controllability and the like exist in the process of directly performing real ship verification in the marine environment, and a scientific and effective alternative verification scheme needs to be explored. Disclosure of Invention The invention aims to solve the technical problem of verifying the emergency release performance of a lifting device in a non-marine environment. The invention provides an emergency detachment verification method, which comprises the following steps of S1, fixing at least one motion reference unit on a lifting device to be tested to collect motion data of the lifting device to be tested, hanging a target weight on a sling of the lifting device to be tested, and hanging at least one detachable weight with a detachment device directly or indirectly on the sling, and S2, triggering the detachment device at least once after the target weight and the detachable weight are pulled up by the lifting device to be tested, so that the tension born by the sling is changed. According to the technical scheme, the steps S1 and S2 are sequentially executed, so that the situation that the to-be-detected lifting device receives a reaction force when an emergency detachment event occurs can be simulated, and the emergency detachment performance of the lifting device is verified in a non-marine environment. Further, the motion reference unit is fixed on a rotating platform and/or a suspension arm of the lifting device to be detected, and the motion data of the lifting device to be detected, which are collected by the motion reference unit, comprise attitude angles and translational motions of the lifting device to be detected. By fixing the motion reference unit, the change of the attitude angle, translational motion and the like of the rotary platform and the suspension arm caused by the reaction force can be timely obtained. The staff can clearly determine the impact of the lifting device to be tested in emergency detachment through analyzing the impact. Further, the detachable weights comprise a first detachable weight and a second detachable weight, the step S2 comprises the following steps of continuously increasing the pulling force output by the lifting device to be detected when the pulling force output by the lifting device to be detected is not larger than the sum of the first detachable weight, the second detachable weight, the target weight and the gravity, and the step S2.2 comprises the step of triggering the second detachable weight detachment device to detach the second detachable weight from the sling after the pulling force output by the lifting device to be detected is larger than the sum of the first detachable weight, the second detachable weight and the gravity borne by the target weight. This step simulates the process of pulling up the target weight from the seabed in a marine environment, restoring the condition that the target weight needs to be removed with greater tension as it is submerged into the seabed. Further, step S2 includes the step S2.3a of adjusting the tension outputted from the lifting device to be tested to be greater than the weight of the target weight and less th