KR20120093622A - A unification apparatus and method for thickness measurement and thickness reduction evaluation - Google Patents

Abstract

PURPOSE: A device and a method for measuring a thickness and evaluating a thickness reduction are provided to measure a residual thickness by focusing on a local portion where a thickness reduction is actually generated because a thickness can be measured by selecting a dense grid and partial grid. CONSTITUTION: A device for measuring a thickness and evaluating a thickness reduction comprises a thickness measuring unit(100) and a thickness evaluation unit(200). The thickness measuring unit measures a thickness of between the inside and the outside of an object. The thickness measuring unit saves the measured thickness as a thickness value. The thickness evaluation unit evaluates a thickness reduction amount, a thickness reduction speed, a residual lifetime, and the soundness of the object based on basic data of the object being input from the outside and the thickness value.

Description

A UNIFICATION APPARATUS AND METHOD FOR THICKNESS MEASUREMENT AND THICKNESS REDUCTION EVALUATION

The present invention relates to a device and a method for measuring and evaluating the thickness between the inside and the outside of a target object, in particular, the thickness of the piping element for the purpose of maintaining the integrity of the piping system in response to the thickness reduction occurring in the piping element The present invention relates to an apparatus and method for unifying the evaluation process of various thickness reduction parameters such as thickness reduction amount, thickness reduction rate, remaining life and soundness based on the measured thickness value.

Pipes made of carbon steel in power plants are vulnerable to flow acceleration corrosion, which can lead to pipe breaking accidents. In particular, as the power generation equipment ages, it causes many problems. In order to continuously monitor the main vulnerable areas, it is necessary to effectively inspect and require a large number of monitoring points when the conventional ultrasonic inspection is performed during the short preventive maintenance period during which the power plant is stopped. it's difficult.

The conventional thickness inspection apparatus concentrates on measuring the thickness of a pipe. In particular, a method through a mode analysis, a method using a filter, a method using an ultrasonic wave, and the like have been proposed as a method of checking the thickness of a pipe. Among these methods, the method using an ultrasonic wave is the most commonly used method.

The thickness inspection apparatus using ultrasonic waves includes an ultrasonic sensor and an analyzer for receiving and analyzing a signal from the ultrasonic sensor. Here, the ultrasonic sensor is a sensor generally used for non-destructive inspection, and in contact with the pipe, generates an ultrasonic signal and detects the ultrasonic signal reflected by the change of the medium. And the analyzer measures the thickness of the object by the time difference between the generated signal and the detection signal measured by the ultrasonic sensor. On the other hand, the thickness measurement by the ultrasonic wave is performed on a grid point formed at regular intervals after removing the thermal insulation material surrounding the outside in the pipe having a certain curvature of the ultrasonic sensor. This is called dense grid. In addition, the thickness reduction degree of the pipe is evaluated based on the thickness information for each grid point. However, the above-described conventional thickness inspection apparatus has the following problems.

First, in the case of measuring the thickness of the pipe by ultrasonic, there is a problem that it takes a long time to check the thickness because the thickness should be measured for each point after dividing the grid finely horizontally and vertically. In addition, in the case of dense grid, the thickness measurement is not effective because the inspection is excessively carried out to the part beyond the local range. In addition, since the evaluation by thickness measurement is not centralized, many kinds of computerized programs must be operated separately, and a considerable amount of time and manpower is required, thereby ensuring the efficiency and economic efficiency of performing the maintenance work of the piping system. There is a problem that can not be.

In the present invention, in the maintenance of piping system integrity, by selecting not only the dense grid but also the partial grid, the thickness can be measured by focusing on the local part where the thickness reduction occurs, and measuring the remaining thickness. Including the basic data input unit, thickness reduction unit, thickness reduction rate evaluation unit, remaining life evaluation unit, and soundness evaluation unit, the thickness reduction evaluation parameters can be calculated by unifying various thickness reduction evaluation processes according to the measured thickness. It is an object of the present invention to provide an apparatus and method for unifying measurement and thickness reduction. In addition, as the thickness measurement and the thickness reduction evaluation are made in a unified device, the detector can be carried as a single device, so that the measurement and evaluation work can be collectively performed at the thickness measurement site.

The thickness measurement and the thickness reduction evaluation unification apparatus 300 according to the present invention measures the thickness between the inside and the outside of the target object 10 using the dual type probe 20 and the ultrasonic wave and stores the thickness as a thickness value. Part 100; And a thickness evaluator 200 evaluating thickness reduction amount, thickness reduction speed, remaining life, and soundness of the target object 10 based on the thickness value and basic data of the target object 10 received from the outside. Characterized in that made up.

In the thickness measurement and thickness reduction evaluation unification apparatus 300 according to the present invention, the thickness evaluation unit 200 includes the thickness reduction amount, the thickness reduction speed, and the remaining life of the target object 10 based on the thickness value and the basic data. A thickness reduction evaluation unit 220 for evaluating the thickness; And a soundness evaluator 240 evaluating the soundness of the target object 10 based on the remaining lifespan.

In the unit for measuring the thickness and reducing the thickness of the unification apparatus 300 according to the present invention, the thickness reduction evaluator 220 receives a basic data input unit 222 for receiving a nominal thickness, an operating time, and a minimum required thickness of the target object 10. ); A thickness reduction amount evaluator 224 for determining a difference between the maximum value of the thickness values and the greater value of the nominal thickness by subtracting the minimum value of the thickness values as a thickness reduction amount; A thickness reduction rate evaluator 226 for dividing the thickness reduction amount by the operation time to determine a thickness reduction rate; And a residual life evaluation unit 228 for calculating a difference between the minimum value of the thickness values and the minimum required thickness and dividing it by the thickness reduction rate to determine the remaining life.

According to an embodiment of the present invention, when the soundness evaluator 240 has a negative value of the remaining life, the target object may be formed using a performance-based soundness evaluation method. It is characterized by evaluating the safety margin in terms of bending load, pressure, thickness of 10).

The thickness measurement and thickness reduction evaluation unification apparatus 300 according to the present invention is characterized in that the thickness measuring unit 100 measures the thickness by selecting one of the dense grid form and the partial grid form.

According to the present invention, the thickness measurement and the thickness reduction evaluation method for unifying the thickness may be performed by measuring the thickness between the inside and the outside of the target object 10 using the dual type probe 20 and the ultrasonic wave and storing it as a thickness value (S100). ); And a thickness evaluation step (S200) of evaluating the thickness reduction amount, thickness reduction speed, remaining life and soundness of the target object 10 based on the thickness value and the basic data of the target object 10 received from the outside. It is characterized by.

In the thickness measurement and thickness reduction evaluation unification method according to the present invention, the thickness evaluation step (S200) evaluates the thickness reduction amount, thickness reduction speed, and remaining life of the target object 10 based on the thickness value and the basic data. Thickness reduction step (S220); And a soundness evaluation step (S240) of evaluating the soundness of the object 10 based on the remaining lifespan.

According to the present invention, the thickness measurement and thickness reduction unification method may include the step of measuring the thickness reduction (S220), the basic data input step of receiving a nominal thickness, an operation time, and a minimum required thickness of the target object (10); A thickness reduction step (S224) of determining a difference between the maximum value of the thickness values and the greater value of the nominal thickness by subtracting the minimum value of the thickness values as a thickness reduction amount (S224); A thickness reduction rate evaluation step (S226) of dividing the thickness reduction amount by the operation time to determine a thickness reduction rate; And a remaining life evaluation step (S228) of calculating a difference between the minimum value of the thickness values and the minimum required thickness and dividing it by the thickness reduction rate to determine the remaining life.

According to the present invention, the thickness measurement and thickness reduction unification method may include the performance evaluation step (S240), when the residual life has a negative value, utilizing the performance-based soundness evaluation method. It is characterized by evaluating the safety margin in terms of bending load, pressure, thickness.

The thickness measurement and thickness reduction evaluation unification method according to the present invention is characterized in that in the thickness measurement step (S100), by selecting one of the dense grid and partial grid shape to measure the thickness.

In the present invention, in the maintenance of piping system integrity, by selecting not only the dense grid but also the partial grid, the thickness can be measured by concentrating on the local part where the thickness reduction occurs substantially, and measuring the remaining thickness. Including the basic data input unit, thickness reduction unit, thickness reduction rate evaluation unit, remaining life evaluation unit, and soundness evaluation unit, the thickness reduction evaluation parameters can be calculated by unifying various thickness reduction evaluation processes according to the measured thickness. There is an effect of providing a measurement and thickness reduction unification unit 300 and method. In addition, as the thickness measurement and the thickness reduction evaluation are made in a unitary device, since the detector can be carried by one device, there is an effect that the measurement and evaluation work can be collectively performed at the thickness measurement site.

1 is a block diagram schematically showing a thickness measurement and thickness reduction evaluation unification apparatus according to the present invention,
2 is a block diagram specifically showing a thickness reduction evaluation unit of the thickness measurement and thickness reduction evaluation unification apparatus according to the present invention;
3 is a view showing an embodiment in which the thickness measurement and thickness reduction unification unit according to the present invention is applied to a target object, according to an embodiment;
4 is a flow chart schematically showing a method for unifying thickness measurement and thickness reduction according to the present invention;
5 is a flow chart schematically showing the thickness evaluation step of the thickness measurement and thickness reduction evaluation unification method according to the present invention,
6 is a flowchart specifically showing the thickness reduction evaluation step of the thickness measurement and thickness reduction evaluation unification method according to the present invention.

Hereinafter, each embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically showing a thickness measurement and thickness reduction evaluation unifying apparatus 300 according to the present invention. As shown in FIG. 1, the unit for measuring the thickness and reducing the thickness of a single unit 300 includes a thickness measuring unit 100 and a thickness evaluating unit 200, and the thickness evaluating unit 200 includes a thickness reducing evaluating unit ( And a health evaluation unit 240. Each component performs the following functions.

First, as described above, the thickness measuring unit 100 measures the thickness of the target object 10 using the dual type probe 20 and the ultrasonic wave. The thickness measuring unit 100 measures the remaining thickness using the dual type probe 20 and the ultrasonic wave with respect to the target object 10 in which the thickness decreases. As described above, the thickness measurement using the ultrasonic wave may include an ultrasonic sensor and an analyzer for receiving and analyzing a signal from the ultrasonic sensor. The ultrasonic sensor is installed on the target object to generate an ultrasonic signal and detect the ultrasonic signal reflected by the change of the medium, and the analyzer measures the thickness of the object by the time difference between the generated signal and the detection signal measured by the ultrasonic sensor. can do. Here, the object 10 may comprise a piping element as described above.

When measuring the thickness, the grid can measure the thickness not only in the form of the existing dense grid, but also in the form of a partial grid for the local part where the thickness reduction occurs substantially. It is because the dense grid is excessively inspected to the part beyond the local part where the thickness reduction is actually occurring, and thus it is not efficient to measure the thickness of the local part when the thickness decrease occurs at a specific part.

The detector may select a grid shape according to the thickness reduction characteristic of the target object 10. In the case where the thickness is reduced over the entire range of the object 10, it may be preferable to measure the thickness in the form of a dense grid, and in the case where the thickness is reduced at a specific local part, it may be preferable to use a partial grid. In addition, when using the partial grid, in order to prevent the grid shape from being changed, a template suitable for the shape of the piping element and the partial thickness reduction part is applied.

Then, the thickness measuring unit 100 stores the measured thickness value therein. The thickness value can be used as data to evaluate parameters related to the thickness reduction in a later step.

The thickness reduction evaluation unit 220 calculates a parameter such as a thickness reduction amount, a thickness reduction speed, and a remaining life based on the thickness value measured by the thickness measurement unit 100. The soundness evaluator 240 evaluates the soundness of the object 10 when the value is negative according to the remaining life of the object 10 calculated by the thickness decrease evaluator 220. It performs the function. The description of the thickness reduction evaluation unit 220 and the soundness evaluation unit 240 will be described in more detail below.

2 is a block diagram specifically illustrating a thickness reduction evaluation unit 220 of the thickness measurement and thickness reduction evaluation unitary apparatus 300 according to the present invention. As shown in FIG. 2, the thickness reduction evaluation unit 220 includes a basic data input unit 222, a thickness reduction amount evaluation unit 224, a thickness reduction rate evaluation unit 226, and a residual life evaluation unit 228. .

The basic data input unit 222 receives a nominal thickness, an operating time, and a minimum required thickness of the target object 10, which is the basic data for evaluating the thickness reduction, from the outside. The nominal thickness is used to evaluate the amount of thickness reduction described below.

Specifically, it is used to calculate the difference between the maximum value of the thickness value stored in the thickness measuring unit 100 and the maximum value of the nominal thickness and the minimum value of the thickness value in determining the thickness reduction amount. In addition, the operation time is used as a divisor dividing the thickness reduction amount in determining the thickness reduction rate described below. The minimum required thickness is used to calculate the difference from the minimum value of the thickness value in determining the remaining life.

The thickness reduction amount evaluator 224 evaluates how much the amount of reduction in the thickness of the target object 10 is. The thickness reduction amount evaluator 224 first determines a larger value among the maximum values of the thickness values stored in the thickness measurement unit 100 and the nominal thickness input from the basic data input unit 222. After determining the larger of these two values, the minimum value of the thickness value stored in the thickness measurement unit 100 is subtracted from the value. The resulting value is determined as the thickness reduction amount. This can be used to determine the thickness reduction rate below.

As described above, the thickness reduction rate evaluator 226 evaluates how fast the reduction rate of the thickness of the target object 10 is progressing. The thickness reduction rate evaluator 226 divides the thickness reduction amount determined by the thickness reduction amount evaluator 224 by the operation time input from the basic data input unit 222. The resulting value is determined by the thickness reduction rate.

The remaining life evaluation unit 228 performs a function of evaluating how long the remaining life of the target object 10 is as the thickness of the target object 10 decreases. The remaining life evaluation unit 228 subtracts the minimum required thickness input through the basic data input unit 222 from the minimum value among the thickness values stored in the thickness measurement unit 100. This value is divided by the thickness reduction rate obtained by the thickness reduction rate evaluation unit 226. The resultant value thus obtained is determined as the remaining life of the target object 10.

Finally, the health evaluation unit 240 performs a function of checking the safety margin of the target object 10 only when the residual life obtained by the remaining life evaluation unit 228 has a negative value. do. The remaining life obtained by the remaining life evaluation unit 228 has a negative value, which means that the minimum value of the thickness values stored in the thickness measuring unit 100 is smaller than the minimum required thickness input through the basic data input unit 222. It means small. This means that the thickness reduction of the target object 10 has been made a lot, and thus the health is evaluated only in this case. Integrity evaluation method utilizes performance-based soundness evaluation method of piping element. By utilizing this, the safety margin in terms of bending load, pressure and thickness of the object 10 is checked.

3 is a diagram illustrating an embodiment in which the thickness measurement and thickness reduction evaluation unifying apparatus 300 according to the present invention is applied to a target object 10, according to an exemplary embodiment. As shown in FIG. 3, the detector directly contacts the dual-type transducer 20 to the target object 10 to measure the thickness between the outside and the inside of the target object 10, and the thickness measurement method using the above-described ultrasonic waves. The thickness is measured by.

The measured thickness value is stored in the thickness measurement unit 100 of the thickness measurement and thickness reduction evaluation unification apparatus 300. Thereafter, when the stored thickness value is input to the thickness evaluation unit 200 of the thickness measurement and thickness reduction evaluation unifying apparatus 300, the thickness evaluation unit 200 collectively sets various parameters related to the thickness reduction by the unified computer program. It can be calculated as

In addition, the thickness measurement and thickness reduction evaluation are made in a unified device, so that the detector can easily carry it with one device. Therefore, the detector may be directly equipped with the apparatus according to the present invention and put into the thickness measurement site to collectively execute the thickness measurement and the thickness evaluation.

Figure 4 is a flow chart schematically showing a method for unifying the thickness measurement and thickness reduction evaluation according to the present invention. As shown in FIG. 4, the thickness measurement and the thickness reduction evaluation method are largely equipped with a thickness measurement step S100 and a thickness evaluation step S200.

In the thickness measuring step S100, the remaining thickness is measured using the dual type probe 20 and the ultrasonic wave with respect to the target object 10 in which the thickness reduction is performed. At this time, as described above, the measurement can be made in the form of a partial grid for the local area where the thickness reduction is substantially progressed as well as the dense grid.

5 is a flow chart schematically showing a thickness evaluation step (S200) of the thickness measurement and thickness reduction evaluation unification method according to the present invention. As shown in FIG. 5, the thickness evaluation step S200 includes a thickness reduction evaluation step S220 and a soundness evaluation step S240.

The thickness reduction step S220 performs a function of calculating parameters such as a thickness reduction amount, a thickness reduction speed, and a remaining life based on the thickness value measured by the thickness measurement unit 100. Integrity evaluation step (S240) is to determine the soundness of the target object 10 when the value is a negative value according to the remaining life of the target object 10 calculated in the thickness reduction evaluation step (S220) Perform the function. The description of the thickness reduction step (S220) and the soundness evaluation step (S240) will be described in more detail below.

Figure 6 is a block diagram specifically showing the thickness reduction step (S220) of the thickness measurement and thickness reduction evaluation unification method according to the present invention. As shown in Figure 6, the thickness reduction step (S220) is provided with a basic data input step (S222), the thickness reduction amount evaluation step (S224), the thickness reduction speed evaluation step (S226) and the remaining life evaluation step (S228) Is done.

As described above, after performing the thickness measurement step (S100), and if the transfer to the basic data input step (S222), the nominal thickness, the operating time and the minimum of the object 10, which is the basic data for evaluating the thickness reduction Request thickness is input from outside. In the case of nominal thickness, the thickness reduction is used for evaluation, the operation time is used for determining the thickness reduction rate, and the minimum required thickness is used for determining the remaining life.

Then, the step of the thickness reduction step (S224), it is evaluated how much the amount of reduction of the thickness of the target object (10). The thickness reduction step (S224) is a minimum value of the thickness values stored in the thickness measurement step (S100) at a larger value among the maximum value of the thickness values stored in the thickness measurement step (S100) and the nominal thickness input in the basic data input step (S222). Determine the amount of thickness reduction by subtracting.

Next, the process proceeds to the thickness reduction rate evaluation step S226, and it is evaluated how fast the reduction speed of the target object 10 is progressing. The thickness reduction rate evaluation step (S226) determines the thickness reduction rate as a result obtained by performing a division operation by the operation time input in the basic data input step (S222) by the thickness reduction amount determined in the thickness reduction amount evaluation step (S224).

Then, the remaining life evaluation step (S228) is to evaluate how long the remaining life of the target object 10 in accordance with the decrease in the thickness of the target object (10). Residual life evaluation step (S228) is subtracted the minimum required thickness input through the basic data input step (S222) from the minimum value of the thickness value stored in the thickness measurement step (S100), this value in the thickness reduction rate evaluation step (S226) The remaining life is determined by dividing by the obtained thickness reduction rate.

Finally, the soundness evaluation step S240 checks the safety margin of the object 10 only when the residual life obtained in the remaining life evaluation step S228 has a negative value. As a soundness evaluation method, the performance-based soundness evaluation method of the piping element may be utilized, and by using the same, safety margins in terms of bending load, pressure, and thickness of the target object 10 may be confirmed.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be possible to various modifications, changes, additions, etc. within the spirit and scope of the invention, such modifications, changes, etc. belong to the following claims You will have to look.

10: object
20: dual type transducer
100: thickness measurement unit
200: thickness evaluation unit
220: thickness reduction unit
222: basic data input unit
224: thickness reduction unit
226: thickness reduction rate evaluation unit
228: remaining life evaluation unit
240: health evaluation unit
300: unit for measuring thickness and reducing thickness
S100: thickness measurement step
S200: thickness evaluation step
S220: thickness reduction step
S222: Basic data input step
S224: thickness reduction step
S226: thickness reduction rate evaluation step
S228: remaining life assessment stage
S240: Health Assessment Step

Claims (10)

A thickness measuring unit 100 measuring the thickness between the inside and the outside of the target object 10 by using the dual type probe 20 and the ultrasonic wave and storing the same as a thickness value; And
A thickness evaluator 200 evaluating thickness reduction amount, thickness reduction speed, remaining life, and soundness of the object 10 based on the thickness value and basic data of the object 10 received from the outside; The unit for measuring the thickness and the thickness reduction evaluation unity 300, characterized in that made.
The method of claim 1, wherein the thickness evaluation unit 200,
A thickness reduction evaluator 220 evaluating the thickness reduction amount, the thickness reduction speed, and the remaining life of the target object 10 based on the thickness value and the basic data; And a soundness evaluating unit 240 evaluating the health of the target object 10 based on the remaining lifespan.
The method of claim 2, wherein the thickness reduction evaluation unit 220,
A basic data input unit 222 for receiving a nominal thickness, an operating time, and a minimum required thickness of the target object 10;
A thickness reduction amount evaluator 224 for determining a difference between the maximum value of the thickness values and the greater value of the nominal thickness by subtracting the minimum value of the thickness values as a thickness reduction amount;
A thickness reduction rate evaluator 226 for dividing the thickness reduction amount by the operation time to determine a thickness reduction rate; And
Unification of the thickness measurement and thickness reduction characterized in that it comprises ;; remaining life evaluation unit 228 for calculating the difference between the minimum value of the thickness value and the minimum required thickness and dividing it by the thickness reduction rate to determine the remaining life Device 300.
The method of claim 3, wherein
When the soundness evaluator 240 has a negative value of the remaining life, the safety margin of the bending load, pressure, and thickness of the target object 10 is evaluated by using a performance-based soundness evaluation method. The unit for measuring the thickness and reducing the thickness unity characterized in that 300.
The method according to claim 1 or 4,
The thickness measurement unit 100, the thickness measurement and thickness reduction unity unit 300, characterized in that for measuring the thickness by selecting one of the dense grid and partial grid form.
A thickness measuring step (S100) of measuring the thickness between the inside and the outside of the target object 10 by using the dual type probe 20 and the ultrasonic wave and storing it as a thickness value;
And a thickness evaluation step (S200) of evaluating the thickness reduction amount, thickness reduction speed, remaining life and soundness of the target object 10 based on the thickness value and the basic data of the target object 10 received from the outside. Thickness measurement and thickness reduction evaluation unified method characterized in that the.
The method of claim 6, wherein the thickness evaluation step (S200),
A thickness reduction evaluation step (S220) of evaluating the thickness reduction amount, the thickness reduction speed, and the remaining life of the object 10 based on the thickness value and the basic data; And a soundness evaluation step (S240) of evaluating the soundness of the target object (10) based on the remaining lifespan.
The method of claim 7, wherein the thickness reduction step (S220),
A basic data input step of receiving a nominal thickness, an operation time, and a minimum required thickness of the target object 10 (S222);
A thickness reduction step (S224) of determining a difference between the maximum value of the thickness values and the greater value of the nominal thickness by subtracting the minimum value of the thickness values as a thickness reduction amount (S224);
A thickness reduction rate evaluation step (S226) of dividing the thickness reduction amount by the operation time to determine a thickness reduction rate; And
Unification of the thickness measurement and thickness reduction characterized in that it comprises a; calculating the difference between the minimum value of the thickness value and the minimum required thickness and divides it by the thickness reduction rate to determine the remaining life (S228) Way.
The method of claim 8,
In the soundness evaluation step (S240), when the residual life has a negative value, the safety margin of the bending load, pressure, and thickness of the target object 10 is determined by using a performance-based soundness evaluation method. Thickness measurement and thickness reduction unification method characterized in that the evaluation.
The method of claim 6 or 8,
In the thickness measurement step (S100), the thickness measurement and thickness reduction unified method characterized in that for measuring the thickness by selecting one of the dense grid and partial grid shape.

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