Hoist point balance monitoring method for double-drum hoist system

Abstract

A kind of double-drum hoist system lifting point balance monitoring method, through the drum rotation sensor being arranged on drum, the wire rope tension sensor being arranged at the end of hoist system wire rope and the lifting point position sensor being arranged on hoist system lifting point, establish the true value table of tension deviation, rotation deviation and position deviation, and calculate the measured drum rotation deviation ΔR, tension deviation ΔF and position deviation ΔS;The mapping relationship of drum rotation deviation ΔR, tension deviation ΔF and position deviation ΔS is corresponded using voting method, when two or more of drum rotation deviation ΔR, tension deviation ΔF and position deviation ΔS are true, it is judged that lifting point is unbalanced, and other conditions are judged that lifting point is balanced.The present application uses the above method, can reliably monitor the balance of double-drum hoist system double lifting point, hardware structure is simple, software function is accurate, improves the reliability and stability of monitoring.

Description

Technical Field

[0001] This invention relates to the field of hoisting technology, specifically a method for monitoring the balance of hoisting points in a dual-drum hoisting system. Background Technology

[0002] Monitoring the balance of the lifting points in a dual-drum hoisting system is a crucial method for ensuring its safe and stable operation. Currently, balance monitoring for dual-drum hoisting systems primarily relies on single-variable monitoring or visual observation by personnel. This type of monitoring demands a high level of experience from operators, requires high accuracy in single-variable monitoring, and suffers from poor reliability, frequently resulting in false alarms and missed alarms. Even when the balance of the two lifting points is already severely compromised, it may not be detected in time, leading to equipment misalignment accidents. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for monitoring the balance of the lifting points of a dual-drum hoisting system. This method can reliably monitor the balance of the dual lifting points of the dual-drum hoisting system. The hardware structure is simple and the software function is accurate. This method can improve the reliability of the dual lifting point balance monitoring, verify each other, avoid false alarms and missed alarms, and improve the reliability and stability of the monitoring.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for monitoring the balance of the lifting points of a double-drum hoisting system, which establishes a true value table of tension deviation, rotation deviation and position deviation by means of a drum rotation sensor set on the drum, a wire rope tension sensor set on the wire rope end of the hoisting system and a lifting point position sensor set on the lifting point of the hoisting system, and calculates the measured drum rotation deviation △R, tension deviation △F and position deviation △S;

[0005] The mapping relationship between the drum rotation deviation △R, tension deviation △F, and position deviation △S is determined by a voting method. When two or more of the drum rotation deviation △R, tension deviation △F, and position deviation △S are true, the lifting point is determined to be unbalanced; otherwise, the lifting point is determined to be balanced.

[0006] In a preferred embodiment, there are two drums, each equipped with a drum rotation sensor, a wire rope tension sensor at the end of the wire rope on each drum, and a lifting point position sensor at each of the two lifting points of the object being lifted.

[0007] The drum rotation sensor, wire rope tension sensor, and lifting point position sensor transmit monitoring signals to the host computer for processing via an industrial bus.

[0008] The method for monitoring the balance of the lifting points of a dual-drum hoisting system specifically includes the following steps:

[0009] 1) Based on the monitoring results of the drum rotation sensor, wire rope tension sensor and suspension point position sensor, calculate the drum rotation deviation ΔR, tension deviation ΔF and position deviation ΔS;

[0010] 2) Compare the drum rotation deviation ΔR with the standard value of the allowable rotation deviation Δ1;

[0011] 2.1) When △R≤△1, the rotational deviation A is false and set to 0;

[0012] 2.2) When △R > △1, the rotational deviation A is true and is set to 1;

[0013] 3) Compare the tensile force deviation ΔF with the allowable tensile force deviation standard value Δ2;

[0014] 3.1) When △F≤△2, the tension deviation B is false and is set to 0;

[0015] 3.2) When △F > △2, the rotational deviation B is true and is set to 1;

[0016] 4) Compare the positional deviation △S with the standard value of the allowable positional deviation △3;

[0017] 4.1) When △S≤△3, the positional deviation C is false and is set to 0;

[0018] 4.2) When △S>△3, the position deviation C is true and is set to 1.

[0019] In the preferred scheme, the measured deviation value is compared with the allowable deviation value, a true deviation value table is formulated, and the balance state of the lifting point is determined according to the true deviation value table.

[0020] In the preferred embodiment, the balance state of the lifting point is determined using the following formula:

[0021] F=

[0022] When F is true after logical operation, it is determined that the two suspension points are balanced; when F is false after logical operation, it is determined that the two suspension points are unbalanced.

[0023] The present invention provides a method for monitoring the balance of the lifting points of a dual-drum hoisting system. By adopting the above method, the following beneficial effects are achieved:

[0024] (1) It solves the problem of missed and false alarms caused by sensor instability in the single-variable monitoring method. By combining multiple variables for monitoring, it can effectively ensure accurate and timely balance monitoring in the dual-suspension-point hoisting system.

[0025] (2) It realizes the mapping relationship between the changing trends of multiple variables and the balance performance, and can realize the comprehensive evaluation of the hoisting system balance, thus improving the accuracy of monitoring results. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] In the diagram: 1. Drum; 2. Drum rotation sensor; 3. Wire rope tension sensor; 4. Lifting point position sensor; 5. Host computer. Detailed Implementation

[0029] Example 1:

[0030] like Figure 1 In this paper, a method for monitoring the balance of a double-drum hoisting system is proposed. The method establishes a true value table of tension deviation, rotation deviation and position deviation by using a drum rotation sensor 2 set on the drum 1, a wire rope tension sensor 3 set on the wire rope end of the hoisting system, and a hoisting point position sensor 4 set on the hoisting point of the hoisting system. The method also calculates the measured drum rotation deviation ΔR, tension deviation ΔF and position deviation ΔS.

[0031] The mapping relationship between the drum rotation deviation △R, tension deviation △F, and position deviation △S is determined by a voting method. When two or more of the drum rotation deviation △R, tension deviation △F, and position deviation △S are true, the lifting point is determined to be unbalanced; otherwise, the lifting point is determined to be balanced.

[0032] Example 2:

[0033] The balance monitoring method for a dual-drum hoisting system consists of both hardware and software components, such as... Figure 1 As shown, the hardware includes two drums 1, each of which is equipped with a drum rotation sensor 2, a wire rope tension sensor 3 at the end of the wire rope of each of the two drums 1, and a lifting point position sensor 4 at each of the two lifting points of the object being lifted.

[0034] The drum rotation sensor 2, wire rope tension sensor 3, and suspension point position sensor 4 transmit monitoring signals to the host computer 5 for processing via an industrial bus. The host computer 5 software completes the processing of sensor signals, establishes a balance monitoring and judgment mapping method, establishes a true value table of tension deviation, rotation deviation, and position deviation, and calculates the measured drum rotation deviation △R, tension deviation △F, and position deviation △S.

[0035] Example 3:

[0036] Based on Example 2,

[0037] The method for monitoring the balance of the lifting points of a dual-drum hoisting system specifically includes the following steps:

[0038] 1) Based on the monitoring results of the drum rotation sensor 2, the wire rope tension sensor 3, and the suspension point position sensor 4, calculate the drum rotation deviation △R, tension deviation △F, and position deviation △S;

[0039] 2) Compare the drum rotation deviation ΔR with the standard value of the allowable rotation deviation Δ1;

[0040] 2.1) When △R≤△1, the rotational deviation A is false and set to 0;

[0041] 2.2) When △R > △1, the rotational deviation A is true and is set to 1;

[0042] 3) Compare the tensile force deviation ΔF with the allowable tensile force deviation standard value Δ2;

[0043] 3.1) When △F≤△2, the tension deviation B is false and is set to 0;

[0044] 3.2) When △F > △2, the rotational deviation B is true and is set to 1;

[0045] 4) Compare the positional deviation △S with the standard value of the allowable positional deviation △3;

[0046] 4.1) When △S≤△3, the positional deviation C is false and is set to 0;

[0047] 4.2) When △S>△3, the position deviation C is true and is set to 1.

[0048] The measured deviation value is compared with the allowable deviation value, a true deviation value table is formulated, and the balance status of the lifting point is determined according to the true deviation value table.

[0049] The above table of true values ​​for deviations and the method for judging the balance state of the lifting points are as follows:

[0050] Deviation True Value Table

[0051]

[0052] Based on the table above, establish the balance mapping relationship of the suspension points, specifically using the following formula:

[0053] F=

[0054] When F is true after logical operation, it is determined that the two suspension points are balanced; when F is false after logical operation, it is determined that the two suspension points are unbalanced.

[0055] This invention employs digital logic mapping conditions to comprehensively assess and monitor the imbalance of a dual-lifting-point winch system. The method is clear, reliable, logically sound, and the hardware is simple and convenient. It is applicable to dual-lifting-point winch systems such as cranes, dock towing systems, and hydropower station gates. During operation, it significantly improves the reliability of dual-lifting-point balance monitoring.

Claims

1. A method for monitoring the balance of a hoisting point of a double-drum hoist system, characterized by: The true values ​​of tension deviation, rotation deviation and position deviation are established by using the drum rotation sensor (2) set on the drum (1), the wire rope tension sensor (3) set on the wire rope end of the hoisting system and the hoisting point position sensor (4) set on the hoisting point of the hoisting system, and the measured drum rotation deviation △R, tension deviation △F and position deviation △S are calculated. The mapping relationship between the drum rotation deviation △R, tension deviation △F, and position deviation △S is determined by a voting method. When two or more of the drum rotation deviation △R, tension deviation △F, and position deviation △S are true, the lifting point is determined to be unbalanced; otherwise, the lifting point is determined to be balanced. There are two drums (1), and each of the two drums (1) is equipped with a drum rotation sensor (2), and each of the two drums (1) is equipped with a wire rope tension sensor (3) at the end of the wire rope. Each of the two lifting points of the object being lifted is equipped with a lifting point position sensor (4). The drum rotation sensor (2), wire rope tension sensor (3) and lifting point position sensor (4) transmit the monitoring signals to the host computer (5) for processing via an industrial bus.

2. The method of claim 1, wherein Specifically, the following steps are included: 1) Based on the monitoring results of the drum rotation sensor (2), the wire rope tension sensor (3) and the lifting point position sensor (4), calculate the drum rotation deviation △R, tension deviation △F and position deviation △S; 2) Compare the drum rotation deviation ΔR with the standard value of the allowable rotation deviation Δ1; 2.1) When △R≤△1, the rotational deviation A is false and set to 0; 2.2) When △R > △1, the rotational deviation A is true and is set to 1; 3) Compare the tensile force deviation ΔF with the allowable tensile force deviation standard value Δ2; 3.1) When △F≤△2, the tension deviation B is false and is set to 0; 3.2) When △F > △2, the tension deviation B is true and is set to 1; 4) Compare the positional deviation △S with the standard value of the allowable positional deviation △3; 4.1) When △S≤△3, the positional deviation C is false and is set to 0; 4.2) When △S>△3, the position deviation C is true and is set to 1.

3. The method of claim 2, wherein: After comparing the measured deviation value with the allowable deviation value, a true deviation value table is prepared, and the balance status of the lifting point is determined based on the true deviation value table.

4. The method of claim 3, wherein: The following formula is used to determine the balance state of the lifting points: F= ； When F is true after logical operation, it is determined that the two suspension points are balanced; when F is false after logical operation, it is determined that the two suspension points are unbalanced.

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