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A method for on-line monitoring and intelligent early warning of inclination angle of tower equipment

A kind of equipment and intelligent technology, which is applied in the direction of alarm, measuring device, surveying and navigation, etc., to achieve the effect of small deviation of measurement data, flexible arrangement of measuring points, and easy realization

Active Publication Date: 2022-03-25
NANJING BOILER & PRESSURE VESSEL SUPERVISION & INSPECTION INST
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AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problem in the prior art that it cannot meet the problem of effective safety identification and early warning for various dangerous sections of the tower when the tower equipment is tilted, the purpose of the present invention is to provide an online monitoring and intelligent early warning method for the inclination angle of the tower equipment, which can Realize the effective identification and monitoring of the dangerous section and weak tower section of the tower body, and the method of using the conventional inclinometer to monitor the tower body inclination online in real time is easy to implement

Method used

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  • A method for on-line monitoring and intelligent early warning of inclination angle of tower equipment
  • A method for on-line monitoring and intelligent early warning of inclination angle of tower equipment
  • A method for on-line monitoring and intelligent early warning of inclination angle of tower equipment

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Effect test

Embodiment 1

[0106] Embodiment 1 is for the tower equipment of equal diameter, equal wall thickness

[0107] like figure 1 As shown, the center A of the top of the tower is taken as the origin, and the central axis of the tower before deformation is taken as the X-axis, and X faces downward. On the section with coordinate x, the wind load concentration is:

[0108]

[0109] The wind bending moment caused by wind load on the section with coordinate x is:

[0110]

[0111] The inclination angle equation is obtained from the approximate differential equation of the mechanical deflection curve of the material:

[0112]

[0113] Combining formula (3) and formula (4), by the boundary condition x=H, θ(H)=0, the inclination angle equation is obtained by integral of formula (4):

[0114]

[0115] For tower equipment with equal diameter and equal wall thickness, the maximum bending moment occurs at the fixed end of the tower, and the inclination angle at the top of the tower is:

[0...

Embodiment 2

[0124] Embodiment 2 is for the tower equipment of equal diameter, unequal wall thickness

[0125] like figure 2 As shown, for tower equipment with equal diameters and different wall thicknesses, the center A of the top of the tower is taken as the origin, and the central axis of the tower before deformation is taken as the X axis, and X faces downward. On the section with coordinate x, the wind load concentration is obtained by formula (2), and the calculation of wind bending moment is obtained by formula (3).

[0126] The bending deformation of a tower vessel with equal diameter and different wall thickness is solved by segmental stiffening method, and the section inclination angle θ of any node i i , when each segment under node i is deformed individually, the cross-sectional rotation angles generated at node i are θ i1 , θ i2 ,...,θ iN . When each segment on the upper side of node i deforms alone, no displacement will occur in the i section, so the superposition princ...

Embodiment 3

[0154] Embodiment 3 inclinometer monitoring inclination calculation

[0155] Step 3 of the present invention, from the top of the tower equipment to the bottom of the tower, inclinometers are installed at each variable section position on the tower body successively, and the position numbers and corresponding inclination angle measurement values ​​of the inclinometers are as follows:

[0156]

[0157]

[0158] according to image 3 As shown, the selected dual-axis inclinometer itself defines the x-axis and y-axis, and its output signals α and β are the deflection angles of the inclinometer around the x-axis and y-axis respectively when placed horizontally. Acceleration sensor output signal g x , g y The relationship between and angles α, β can be given by the following formula:

[0159]

[0160] In the formula, g x , g y Respectively represent the component output of the acceleration of gravity on the x-axis and the y-axis, and g is the acceleration of gravity. ...

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Abstract

An online monitoring and intelligent early warning method for the inclination angle of tower equipment, based on the allowable stress of the material, the allowable inclination angle of each section after the tower body is bent under the action of wind load is obtained[ θ i ], by arranging inclinometers on the tower top of the tower equipment and on each design dangerous section, the measured value of each inclinometer is measured ( α 1i , β 1i ), and then calculate the actual inclination value of each section relative to the plumb direction of 360° θ i , the actual inclination value θ i The allowable inclination angle with the corresponding section [ θ i ] for comparison and judgment, if the actual inclination value of each section θ i All are lower than their allowable inclination angle [ θ i ] is judged as safe, otherwise one or more θ i Exceeding the allowable inclination [ θ i ], it is judged as unsafe, the system automatically screens out the position and inclination value of the overrun dangerous section and records it, and sends out an early warning signal at the same time.

Description

technical field [0001] The invention relates to a tower equipment safety monitoring and early warning method, which belongs to the field of production safety, and in particular to an online monitoring and intelligent risk early warning method for the inclination angle of slender tower equipment. Background technique [0002] Tower equipment is an important mass transfer equipment in the chemical and petrochemical industries. The steel consumption and cost of the whole set of process equipment account for a very high proportion, some even nearly 50%. In order to improve economic benefits and reduce production costs, the tower equipment is developed in the direction of large-scale and high-diameter ratio H / D (H is tower height, mm; D is tower outer diameter, mm). Tower equipment with a large height-to-diameter ratio is prone to large-scale deflection deformation under the combined wind bending moment dominated by wind loads, resulting in large axial section stress. If the def...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C9/00G08B21/18
CPCG01C9/00G08B21/18
Inventor 业成张伯君文耀华于敬利崔强方学锋姜君雒相垚周丹
Owner NANJING BOILER & PRESSURE VESSEL SUPERVISION & INSPECTION INST
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