JP5377346B2 - Method and apparatus for inspection of thin tubes of heat exchangers - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat exchanger thin tube inspection method and apparatus for inspecting each thin tube by sequentially inserting inspection sensors into a large number of thin tubes joined to a tube plate of a heat exchanger using an insertion jig. .

In the manufacture of a multitubular heat exchanger in which a large number of thin tubes are joined to the tube plate of the heat exchanger, the thin tubes and the tube plate are joined to each thin tube. For this reason, when joining a thin tube and a tube plate, every time the thin tube and the tube plate are joined, the joining completion data is input and combined with the previously obtained thin tube arrangement data to complete the joining. There has been proposed an apparatus that makes it easy to distinguish between a thin tube and an unjoined thin tube, and prevents the occurrence of a joining leaking thin tube (see, for example, Patent Document 1).

JP 2003-340534 A

On the other hand, when conducting regular inspections of multi-tubular heat exchangers that are in use, during the inspection, in order to inspect each thin tube joined to the tube sheet at the installation site of the heat exchanger In addition, there is a high possibility that the distinction between the inspection-completed tubules and the untested tubules will be unclear, or an inspection omission will occur. For this reason, for example, a number of thin tubes are divided into a plurality of piping rows and numbered (symbolized), and the number of thin tubes belonging to each piping row is numbered. Each inspection is conducted. At this time, in order to confirm the pipe row and the thin tubes included in the pipe row, when performing inspection of the thin tube, the pipe row number, the thin tube number to be inspected first in the pipe row, and the thin tube number to be inspected last. Each has been confirmed. However, in this confirmation work, there is no guarantee that the inspection of the narrow tube in the pipe line is definitely performed, and there is a problem from the viewpoint of the reliability of the inspection. Further, during the inspection work, a work different from the inspection work of confirming the pipe row number and the thin tube number is incorporated in between, so that the inspection work becomes complicated and the efficiency of the inspection work decreases.

The present invention has been made in view of such circumstances, and is capable of preventing errors in inspection tubes and omissions, and inspecting heat exchanger tubes that can improve inspection efficiency and inspection reliability. It is an object to provide a method and apparatus.

In the heat exchanger thin tube inspection method according to the first aspect of the present invention, the inspection sensors are sequentially inserted into a large number of thin tubes A joined to the tube plate of the heat exchanger using an insertion jig. In the heat exchanger thin tube inspection method for inspecting the thin tube A,
Based on the design data of the heat exchanger, a tube nest diagram showing the arrangement of the thin tubes A provided on the tube plate is created, and a large number of thin tubes B described in the tube nest diagram are divided into a plurality of piping rows And a first step of assigning each narrow tube B an identification code having a pipe row number for specifying the pipe row to which the thin tube B belongs and a rank number for specifying the position of the thin tube B in the pipe row. When,
Corresponding to each of the piping rows, the identification pieces on which the identification codes of the narrow tubes B included in the piping row are described are arranged side by side at the piping pitch in the design data corresponding to each of the narrow tubes B. A second step of producing each partially simulated tube sheet;
The piping row to be inspected is set as an inspection piping row on the tube chart, and the partial simulated tube sheet corresponding to the inspection piping row is an actual inspection piping of the heat exchanger corresponding to the inspection piping row. A third step of installing the identification pieces of the partial simulated tube sheet and the thin tubes A belonging to the actual inspection piping row next to each other on the actual piping row adjacent to the row;
When performing the inspection of the thin tube A of the actual inspection piping row corresponding to the thin tube B of the inspection piping row, the identification code of the identification piece of the partial simulated tube plate arranged next to the thin tube A is used. A fourth step of inserting the inspection sensor into the narrow tube A using the insertion jig after reading with a reader attached to the insertion jig;
The pipe row number and the rank number are obtained from the identification code of the identification piece read by the reader, the position of the narrow tube A is superimposed on the tube chart, and the displayed position of the narrow tube A is displayed. Is in conformity with the position of the narrow tube B in the inspection pipe line on the tube chart, the inspection of the thin tube A into which the inspection sensor is inserted is started. And a fifth step of collecting from the thin tube A.

In the thin tube inspection method for a heat exchanger according to the first aspect of the invention, the partial simulated tube sheet is arranged such that the identification piece is arranged on the front side of an elongated member having a width of 50 to 150% of the outer diameter of the thin tube A. Can be.
In the heat exchanger thin tube inspection method according to the first invention, the identification code may be a bar code indicating the pipe row number and the rank number.

In the heat exchanger thin tube inspection method according to the first invention, the pipe row is divided into a group in which the pipe row number is an odd number and a group in which the pipe row number is an even number, and the inspection pipe row is divided into each group. It is preferable to set each of them.

A thin tube inspection device for a heat exchanger according to a second invention that meets the above object is provided by sequentially inserting inspection sensors into a large number of thin tubes A joined to a tube plate of a heat exchanger using an insertion jig. In the heat exchanger thin tube inspection device that inspects the thin tube A,
Based on the design data of the heat exchanger, a tube nest diagram creating means for creating a tube nest diagram showing the arrangement of the narrow tubes A provided on the tube plate;
A large number of thin tubes B described in the tube chart are divided into a plurality of pipe rows, and each thin tube B is assigned a pipe row number that identifies the pipe row to which the thin tube B belongs, and the thin tubes B in the pipe row. An identification piece producing means for producing an identification piece on which an identification code having a rank number for specifying the position is described;
Corresponding to each pipe row, the identification pieces on which the identification codes of the respective thin tubes B included in the pipe row are arranged are arranged side by side at the pipe pitch in the design data corresponding to the respective thin tubes B. Partially simulated tube sheet,
The piping row to be inspected is set as an inspection piping row on the tube chart, and the partial simulated tube sheet corresponding to the inspection piping row is an actual inspection piping of the heat exchanger corresponding to the inspection piping row. On the actual piping row adjacent to the row, the identification pieces of the partial simulated tube plate and the thin tubes A belonging to the actual inspection piping row are installed adjacent to each other, and the inspection piping row When the inspection sensor is inserted into the thin tube A of the actual inspection pipe line corresponding to the thin tube B by using the insertion jig, the inspection sensor is attached to the insertion jig and arranged next to the thin tube A. A reader for reading the identification code of the identification piece of the partially simulated tube sheet;
The pipe row number and the rank number are obtained from the identification code of the identification piece read by the reader, and the position of the narrow tube A corresponding to the identification piece is displayed superimposed on the tube chart and displayed. Further, it is determined whether or not the position of the narrow tube A matches the position of the narrow tube B in the inspection pipe line on the tube chart, and if it matches, the inspection of the thin tube A into which the inspection sensor is inserted. If it does not coincide with the start, it has inspection operation means for instructing the collection of the inspection sensor from the capillary A.

In the thin tube inspection device for a heat exchanger according to the second invention, when the partial simulated tube sheet is installed on the actual pipe row adjacent to the actual inspection pipe row on the back side of the partial simulated tube plate. It is preferable that a guide member for positioning the identification piece of the partial simulated tube plate with respect to each of the thin tubes A of the actual inspection piping row is provided so as to be fitted to the end of the thin tube A of the actual piping row. .

In the heat exchanger thin tube inspection method according to the first invention and the heat exchanger thin tube inspection device according to the second invention, a tube nest diagram showing the arrangement of the thin tubes is created, and an inspection object is shown on the tube nest diagram Since it is confirmed whether or not the thin tube where the inspection sensor is actually inserted is the thin tube to be inspected on the tube chart, it is possible to prevent errors in the inspection tube and omission of inspection. The reliability of inspection can be improved. In addition, since the work for confirming the narrow tube is performed as part of the inspection work, the efficiency of the inspection work can be improved.

In the method for inspecting a thin tube of a heat exchanger according to the first invention, the partially simulated tube sheet is formed by arranging the identification pieces on the front side of an elongated member having a width of 50 to 150% of the outer diameter of the thin tube A. In this case, the partial simulated tube sheet can be arranged next to the actual inspection piping row without interfering with the actual inspection piping row, and the inspection of the actual inspection piping row can be performed efficiently.
In the method for inspecting a thin tube of a heat exchanger according to the first invention, when the identification code is a bar code indicating a pipe row number and a rank number, the identification code can be read quickly and easily.

In the method for inspecting a thin tube of a heat exchanger according to the first invention, the piping row is divided into a group having an odd piping row number and a group having an even piping row number, and the inspection piping row is set in each group. If the inspection pipe line is set in the odd group, the partial simulated tube sheet is assigned to the actual pipe line belonging to the even group, and if the inspection pipe line is set to the even group, the partial simulated pipe sheet is assigned to the actual pipe line belonging to the odd group. It is possible to dispose the actual inspection pipe line on the tube sheet of the heat exchanger. As a result, the efficiency of inspection work can be further improved.

In the thin tube inspection device for a heat exchanger according to the second invention, when the partial simulated tube plate is installed on the actual pipe row adjacent to the actual test piping row on the back side of the partial simulated tube plate, In the case where a guide member is provided that is inserted into the end portion of the thin tube A and positions the identification piece of the partial simulated tube plate with respect to each thin tube A of the actual inspection piping row, the guide member adjacent to the actual inspection piping row of the partial simulation tube plate is provided. Installation on the actual piping line can be easily performed.

(A), (B) is explanatory drawing of the test | inspection execution means and test | inspection operation means of the thin-tube inspection apparatus of the heat exchanger which concern on one embodiment of this invention, respectively. It is explanatory drawing of the partial simulation tube sheet of the same thin tube inspection apparatus. It is explanatory drawing of the test | inspection operation means of the same thin tube inspection apparatus. It is explanatory drawing of the heat exchanger which inspects a thin tube by applying the thin tube inspection method of the heat exchanger which concerns on one embodiment of this invention. It is explanatory drawing of the thin tube inspection method of the same heat exchanger.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1A and 1B, a heat exchanger capillary inspection device 10 according to an embodiment of the present invention is provided on a tube plate 12 of a heat exchanger 11 (see FIG. 4). An eddy current sensor 15, which is an example of an inspection sensor, is sequentially inserted into a large number (for example, about 1000 to 10,000) of thin tubes (thin tubes A) 13 using an insertion jig (for example, an insertion air gun) 14. The inspection is performed, and has inspection execution means 16 arranged at the installation location of the heat exchanger 11 and inspection operation means 17 for instructing and confirming the thin tube 13. Furthermore, the heat exchanger thin tube inspection device 10 creates a tube nest drawing creating means 19 (on the basis of the design data of the heat exchanger 11 to create a tube nest diagram 18 showing the arrangement of the thin tubes 13 provided on the tube plate 12 ( 3) and a large number of narrow tubes (thin tubes B) 20 shown in FIG. 18 are divided into a plurality of piping rows 21, and the piping row numbers for identifying the piping rows 21 to which the narrow tubes 20 belong to each of the thin tubes 20. X and a barcode labeler (not shown) for producing an identification piece 22 on which a barcode Z, which is an example of an identification code having a rank number Y specifying the position of the narrow tube 20 in the pipe line 21, is described. One example). This will be described in detail below. Here, a commercially available barcode label can be used.

The inspection execution means 16 includes an eddy current sensor 15, an insertion jig 14, and an identification piece 22 on which an identification code of each narrow tube 20 included in the pipe row 21 is described corresponding to each pipe row 21 in the tube chart 18. Is the piping pitch in the design data corresponding to each of the thin tubes 20 included in the piping row 21, for example, the front side of the elongated member 23 having a width of 50 to 150% of the outer diameter of the thin tube 13 of the heat exchanger 11. And the partial simulated tube sheet 24 arranged side by side. Further, the inspection execution means 16 sets the pipe row 21 to be inspected as the inspection pipe row on the pipe nest 18 and exchanges the partial simulated tube plate 24 corresponding to the inspection pipe row with the heat exchange corresponding to the inspection pipe row. On the actual pipe line 26 adjacent to the actual inspection pipe line 25 of the vessel 11, each identification piece 22 of the partial simulated tube sheet 24 and the thin tube 13 belonging to the actual inspection pipe line 25 are adjacent to each other. When the eddy current sensor 15 is inserted into the narrow tube 13 of the actual inspection piping row 25 corresponding to the narrow tube 20 of the inspection piping row by using the insertion jig 14, the thin tube 13 attached to the insertion jig 14 and inspected is adjacent. A barcode reader (an example of a reader) 27 that reads the barcode Z of the identification piece 22 of the partial simulated tube sheet 24 disposed in the position is provided.

Here, as shown in FIG. 2, on the back side of the elongated member 23 of the partial simulated tube sheet 24, when the partial simulated tube sheet 24 is installed on the actual pipe line 26 adjacent to the actual inspection pipe line 25, For example, a tubular guide member 28 is provided for positioning the identification piece 22 of the partial simulated tube sheet 24 with respect to each of the thin tubes 13 of the actual inspection piping row 25 by fitting into the ends of the plurality of thin tubes 13 of the actual piping row 26. It has been. A commercially available barcode reader 27 can be used.

The tube nest drawing creating means 19 shown in FIG. 3 obtains the joining position (row, number) of the narrow tubes 13 to be joined to the tube sheet 12 from the design data of the heat exchanger 11 inputted via the data input device 29. A virtual tube sheet is formed, and the obtained joining position is set as the position of the thin tube 20 on the virtual tube sheet, and thin tube arrangement data indicating the arrangement relationship of the thin tubes 13 on the tube plate 12 is created. A nest chart creating function for displaying as a nest chart 18 is provided. Here, the nest chart creating means 19 can be formed by installing a program that develops a nest chart creating function in a personal computer. The data input device 29 can be a personal computer input device (for example, a keyboard), and the display device 30 can be a personal computer display device.

As shown in FIG. 3, the inspection operation means 17 sets the pipe row designation data for setting the pipe row 21 to be inspected as the inspection pipe row on the nest figure 18, and the inspection target thin tubes 20 in the inspection pipe row. When the narrow tube designation data to be set is input via the data input device 29, the pipe row designation data and the narrow tube designation data are stored, and the pipe row designation data and the thin tube designation data are stored on the tube chart 18 as an inspection target. The narrow tube designator 31 having a function of displaying the position of the thin tube 20 is connected to the barcode reader 27 and the cable 32, and the pipe row number X and the rank number Y are obtained from the read identification code of the identification piece 22. And an inspection capillary display 33 having a function of displaying the position of the capillary 13 corresponding to the identification piece 22 on the tube nest 18.

Further, the inspection operation means 17 performs an inspection in which the position of the narrow tube 13 corresponding to the identification piece 22 obtained via the inspection thin tube display 33 is determined from the pipe row designation data and the thin tube designation data stored in the thin tube designator 31. In the case of matching, the determination unit 34 having a function of determining whether or not the position of the target thin tube 20 is matched. On the display 30, a signal instructing the start of inspection of the narrow tube 13 in which the eddy current sensor 15 is inserted is displayed. If they do not match, the inspection operator 35 has a function of displaying a signal for instructing the recovery of the eddy current sensor 15 from the narrow tube 13 on the display 30. Further, when data indicating that the inspection of the narrow tube 13 has been completed is input via the data input device 29, the inspection operating means 17 applies to the narrow tube 20 on the nest figure 18 corresponding to the narrow tube 13 whose inspection has been completed. It has an inspection work indicator 36 having a function of describing data that has been inspected. Here, the description of the data for which inspection has been completed is performed, for example, by changing the display color of the narrow tube 20 on the tube chart 18. In addition, the thin tube designating device 31, the inspection thin tube display 33, the determination device 34, the inspection operation device 35, and the inspection work display device 36 are installed in the personal computer with each program expressing a function corresponding to each device. Can be formed.

Subsequently, a thin tube inspection method for a heat exchanger according to an embodiment of the present invention will be described.
As shown in FIG. 4, the heat exchanger thin tube inspection method according to one embodiment of the present invention uses insertion jigs 14 in a large number of thin tubes 13 joined to the tube plate 12 of the heat exchanger 11. Each of the thin tubes 13 is inspected by sequentially inserting an eddy current sensor 15 as an example of an inspection sensor, and has five steps. Details will be described below.

First, the design data of the heat exchanger 11 is input to the tube chart creating means 19 using the data input device 29, and the tube chart 18 showing the arrangement of the narrow tubes 13 provided on the tube sheet 12 based on the design data ( 1B) is created. Then, a large number of thin tubes 20 shown in FIG. 18 are divided into a plurality of piping rows 21, and each of the thin tubes 20 has a piping row number X that identifies the piping row 21 to which the thin tubes 20 belong and the narrow tubes in the piping row 21. An identification code having a rank number Y specifying 20 positions is assigned (first step). As a result, a specific thin tube 20 can be distinguished from among a large number of thin tubes 20 using the pipe line number X and the rank number Y on the tube nest 18.

Next, the identification code assigned to each thin tube 20 is converted into a barcode Z using a barcode labeler, and an identification piece 22 on which the barcode Z is written is created. And the identification piece 22 is divided for every piping row | line | column 21, and was provided with the width | variety of 50 to 150% of the outer diameter of the thin tube 13 by the piping pitch in the design data corresponding to each thin tube 20 in each piping row | line | column 21, respectively. Partial simulated tube sheets 24 arranged side by side on the front side of the elongated member 23 (for example, a resin plate having a thickness of about 1 to 3 mm) are respectively produced (second step). Thus, by arranging the partial simulated tube sheets 24 corresponding to the pipe rows 21 in the order of the pipe rows 21, an actual size simulated tube sheet corresponding to the tube plates 12 can be formed.

Then, the pipe row 21 to be inspected is set as an inspection pipe row on the tube chart 18, and pipe row designation data is input to the narrow pipe designation device 31 via the data input device 29. Moreover, the partial simulation tube sheet 24 corresponding to this test | inspection piping row is each identification of the partial simulation tube sheet 24 on the actual piping row | line | column 26 adjacent to the actual inspection piping row | line | column 25 of the heat exchanger 11 corresponding to a test | inspection piping row | line | column. The pieces 22 and the thin tubes 13 belonging to the actual inspection pipe line 25 are installed in a state where they are adjacent to each other. Here, the operation of installing the partial simulated tube sheet 24 on the actual pipe row 26 is performed by an operator entering the heat exchanger 11 from the manhole 37 provided at the end of the heat exchanger 11 shown in FIG. . At this time, the piping row 21 is divided into a group (odd group) in which the piping row number X is an odd number and a group (even number group) in which the piping row number X is an even number, and an inspection piping row is set in each group. . For example, when the inspection pipe row is set in the odd group, the partial simulated tube plate 24 corresponding to the odd group pipe row 21 is adjacent to the odd number actual inspection pipe row 25 corresponding to the odd number inspection pipe row. It is installed on the even-numbered actual piping line 26. When the partial simulated tube sheet 24 is installed on the actual pipe line 26, the barcode Z of an arbitrary identification piece 22 provided on the partial simulated tube sheet 24 is read by the barcode reader 27, and the partial simulated tube sheet 24 is read. This is performed while confirming whether or not the piping row number X matches the piping row number of the actual inspection piping row 25. (Third step).

When the inspection of the narrow tube 13 provided on the tube plate 12 is performed, as shown in FIG. 5, an operator carrying the insertion jig 14 with the eddy current sensor 15 enters the heat exchanger 11 from the manhole 37. The eddy current sensor 15 is inserted into the thin tube 13 using the insertion jig 14. Here, when the inspection of the narrow tube 20 in the inspection pipe line is performed, the thin tube designation data of the thin tube 20 is input to the thin tube designator 31 via the data input device 29. Thereby, the inspection target narrow tube 20 is displayed on the tube chart 18 displayed on the display 30. Then, the operator of the inspection operation means 17 arranged on the inspection operation means 17 side sends the capillary tube designation data to the operator in the heat exchanger 11 via a communication means (for example, a radio device, a mobile phone) (not shown). This is transmitted as the piping row number X of the inspection piping row and the rank number Y of the narrow tube 20 to be inspected in the inspection piping row. The worker who has obtained the narrow tube designation data selects the narrow tube 13 of the actual inspection piping line 25 corresponding to the narrow tube designation data from the narrow tubes 13 provided on the tube plate 12 and is arranged next to the selected narrow tube 13. The barcode Z of the identification piece 22 on the partially simulated tube plate 24 is read by a barcode reader 27 attached to the insertion jig 14, and then the eddy current sensor 15 is inserted into the selected narrow tube 13 using the insertion jig 14. Insert (fourth step). Here, since the partial simulated tube plate 24 is installed in the actual piping row 26 adjacent to the actual inspection piping row 25, the partial simulated tube plate 24 serves as a guide, and the actual inspection piping row corresponding to the thin tube designation data. Twenty-five narrow tubes 13 can be easily selected.

When the eddy current sensor 15 is inserted into the selected narrow tube 13, the pipe row number X and the rank number Y are obtained from the barcode Z of the identification piece 22 read by the barcode reader 27 and selected (the eddy current sensor). The position of the narrow tube 13 (with 15 inserted) is displayed so as to be superimposed on the nest figure 18, and whether or not the displayed position of the narrow tube 13 matches the position of the narrow tube 20 in the inspection pipe row on the nest figure 18. Is determined by the determiner 34. When the position of the narrow tube 13 in which the eddy current sensor 15 is inserted matches the position of the narrow tube 20 in the inspection pipe line on the tube nest 18, an inspection start signal is output from the inspection operation device 35 to the display 30. Then, the operator of the inspection operation means 17 instructs the worker in the heat exchanger 11 to start inspection, and inspection of the narrow tube 13 in which the eddy current sensor 15 is inserted is started. On the other hand, when the position of the narrow tube 13 into which the eddy current sensor 15 is inserted does not match the position of the narrow tube 20 in the inspection pipe row on the tube nest 18, the eddy current sensor 15 from the thin tube 13 is inspected via the inspection operation unit 35. A signal instructing recovery is output to the display 30, and the operator of the inspection operation means 17 instructs the operator in the heat exchanger 11 to recover the eddy current sensor 15, and the eddy current sensor 15 is recovered from the narrow tube 13 ( (5th process).

When the inspection of the thin tube 13 is started, the inspection data is input to an inspection data analyzer (not shown) via the signal cable 38 connected to the eddy current sensor 15 to obtain an inspection result. When the eddy current sensor 15 is collected, the narrow tube 13 of the actual inspection pipe row 25 corresponding to the thin tube designation data is selected again from the thin tubes 13 belonging to the actual inspection pipe row 25, and next to the reselected thin tube 13. After the barcode Z of the identification piece 22 on the arranged partial simulated tube plate 24 is read by the barcode reader 27 attached to the insertion jig 14, the vortex is applied to the reselected narrow tube 13 using the insertion jig 14. The sensor 15 is inserted.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, in this embodiment, the identification piece is stuck on the elongated member, but it is a case where the identification piece is stuck on the sheet that matches the shape of part or all of the tube sheet, with the piping pitch in the design data. However, the present invention is applicable.

10: heat exchanger thin tube inspection device, 11: heat exchanger, 12: tube plate, 13: thin tube, 14: insertion jig, 15: eddy current sensor, 16: inspection execution means, 17: inspection operation means, 18: Tube nest diagram, 19: Tube nest drawing creation means, 20: Narrow tube, 21: Piping row, 22: Identification piece, 23: Elongated member, 24: Partial simulated tube plate, 25: Actual inspection piping row, 26: Actual piping row 27: Bar code reader, 28: Guide member, 29: Data input device, 30: Display device, 31: Capillary tube designator, 32: Cable, 33: Inspection thin tube display device, 34: Judgment device, 35: Inspection operation device 36: Inspection work indicator 37: Manhole 38: Signal cable

Claims (6)

In the heat exchanger thin tube inspection method for inspecting each thin tube A by sequentially inserting inspection sensors into the many thin tubes A joined to the tube plate of the heat exchanger using an insertion jig,
Based on the design data of the heat exchanger, a tube nest diagram showing the arrangement of the thin tubes A provided on the tube plate is created, and a large number of thin tubes B described in the tube nest diagram are divided into a plurality of piping rows And a first step of assigning each narrow tube B an identification code having a pipe row number for specifying the pipe row to which the thin tube B belongs and a rank number for specifying the position of the thin tube B in the pipe row. When,
Corresponding to each of the piping rows, the identification pieces on which the identification codes of the narrow tubes B included in the piping row are described are arranged side by side at the piping pitch in the design data corresponding to each of the narrow tubes B. A second step of producing each partially simulated tube sheet;
The piping row to be inspected is set as an inspection piping row on the tube chart, and the partial simulated tube sheet corresponding to the inspection piping row is an actual inspection piping of the heat exchanger corresponding to the inspection piping row. A third step of installing the identification pieces of the partial simulated tube sheet and the thin tubes A belonging to the actual inspection piping row next to each other on the actual piping row adjacent to the row;
When performing the inspection of the thin tube A of the actual inspection piping row corresponding to the thin tube B of the inspection piping row, the identification code of the identification piece of the partial simulated tube plate arranged next to the thin tube A is used. A fourth step of inserting the inspection sensor into the narrow tube A using the insertion jig after reading with a reader attached to the insertion jig;
The pipe row number and the rank number are obtained from the identification code of the identification piece read by the reader, the position of the narrow tube A is superimposed on the tube chart, and the displayed position of the narrow tube A is displayed. Is in conformity with the position of the narrow tube B in the inspection pipe line on the tube chart, the inspection of the thin tube A into which the inspection sensor is inserted is started. And a fifth step of recovering from the thin tube A. A thin tube inspection method for a heat exchanger. The thin tube inspection method for a heat exchanger according to claim 1, wherein the partial simulated tube sheet is formed by arranging the identification pieces side by side on the front side of an elongated member having a width of 50 to 150% of the outer diameter of the thin tube A. A method for inspecting a thin tube of a heat exchanger. 3. The heat exchanger capillary inspection method according to claim 1, wherein the identification code is a bar code indicating the pipe row number and the rank number. In the thin tube inspection method for a heat exchanger according to any one of claims 1 to 3, the pipe row is divided into a group in which the pipe row number is an odd number and a group in which the pipe row number is an even number, A method for inspecting a thin tube of a heat exchanger, wherein an inspection pipe line is set in each group. In the heat exchanger thin tube inspection apparatus for inspecting the thin tube A by sequentially inserting inspection sensors into the large number of thin tubes A joined to the tube plate of the heat exchanger,
Based on the design data of the heat exchanger, a tube nest diagram creating means for creating a tube nest diagram showing the arrangement of the narrow tubes A provided on the tube plate;
A large number of thin tubes B described in the tube chart are divided into a plurality of pipe rows, and each thin tube B is assigned a pipe row number that identifies the pipe row to which the thin tube B belongs, and the thin tubes B in the pipe row. An identification piece producing means for producing an identification piece on which an identification code having a rank number for specifying the position is described;
Corresponding to each pipe row, the identification pieces on which the identification codes of the respective thin tubes B included in the pipe row are arranged are arranged side by side at the pipe pitch in the design data corresponding to the respective thin tubes B. Partially simulated tube sheet,
The piping row to be inspected is set as an inspection piping row on the tube chart, and the partial simulated tube sheet corresponding to the inspection piping row is an actual inspection piping of the heat exchanger corresponding to the inspection piping row. On the actual piping row adjacent to the row, the identification pieces of the partial simulated tube plate and the thin tubes A belonging to the actual inspection piping row are installed adjacent to each other, and the inspection piping row When the inspection sensor is inserted into the thin tube A of the actual inspection pipe line corresponding to the thin tube B by using the insertion jig, the inspection sensor is attached to the insertion jig and arranged next to the thin tube A. A reader for reading the identification code of the identification piece of the partially simulated tube sheet;
The pipe row number and the rank number are obtained from the identification code of the identification piece read by the reader, and the position of the narrow tube A corresponding to the identification piece is displayed superimposed on the tube chart and displayed. Further, it is determined whether or not the position of the narrow tube A matches the position of the narrow tube B in the inspection pipe line on the tube chart, and if it matches, the inspection of the thin tube A into which the inspection sensor is inserted. An inspection operation means for instructing the recovery of the inspection sensor from the thin tube A when the start does not match, a thin tube inspection device for a heat exchanger. In the thin tube inspection device for a heat exchanger according to claim 5, when the partial simulated tube plate is installed on the actual piping row adjacent to the actual inspection piping row on the back side of the partial simulated tube plate, A guide member is provided which is fitted into an end portion of the thin tube A of the actual pipe row and positions the identification piece of the partial simulated tube plate with respect to the thin tubes A of the actual inspection pipe row. Capacitor inspection device for heat exchanger.

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