KR20230066294A - Fin tube inspection device of heat recovery steam generator - Google Patents

Fin tube inspection device of heat recovery steam generator Download PDF

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KR20230066294A
KR20230066294A KR1020230056652A KR20230056652A KR20230066294A KR 20230066294 A KR20230066294 A KR 20230066294A KR 1020230056652 A KR1020230056652 A KR 1020230056652A KR 20230056652 A KR20230056652 A KR 20230056652A KR 20230066294 A KR20230066294 A KR 20230066294A
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unit
fin tube
heat recovery
header
recovery boiler
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KR1020230056652A
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Korean (ko)
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길두송
서정석
정계조
허재실
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한국전력공사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B19/00—Wheels not otherwise provided for or having characteristics specified in one of the subgroups of this group
    • B60B19/006—Magnetic wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
    • F22B1/1815—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines using the exhaust gases of gas-turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2200/00—Prediction; Simulation; Testing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
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  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

An embodiment of the present invention is to provide a fin tube inspection device for a heat recovery steam generator, which can stably and easily inspect the inner surface thinning and defect state of a downward fin tube of a heat recovery steam generator of a combined cycle power plant. The fin tube inspection device for a heat recovery steam generator according to an embodiment of the present invention comprises: a sensor unit which moves along a preset inspection path inside a header of a heat recovery steam generator and inspects the inner surface condition of a fin tube connected to the header; and a moving unit which is provided on one side of the sensor unit and moves the sensor unit along the inspection path.

Description

배열 회수 보일러의 핀 튜브 검사장치{FIN TUBE INSPECTION DEVICE OF HEAT RECOVERY STEAM GENERATOR}Fin tube inspection device of heat recovery boiler {FIN TUBE INSPECTION DEVICE OF HEAT RECOVERY STEAM GENERATOR}

본 발명은 배열 회수 보일러의 핀 튜브 검사장치에 관한 것이다.The present invention relates to a fin tube inspection device for a heat recovery boiler.

복합 화력 발전소의 배열 회수 보일러(HRSG : Heat Recovery Steam Generator) 튜브는 내면의 다양한 손상 메커니즘에 의해 누설 및 고장이 빈번하게 발생하고 있다. 배열 회수 보일러 튜브의 외면은 핀(Fin)이 부착되어 접근이 어려울 뿐만 아니라 외부 육안점검에 의한 손상 부위 판별이 어려워 실제 누설이 발생되기 전까지 적절한 검사방법이 없는 실정이다. Heat recovery steam generator (HRSG) tubes of combined cycle power plants frequently leak and fail due to various damage mechanisms on the inner surface. The outer surface of the heat recovery boiler tube is difficult to access due to the attached fin, and it is difficult to determine the damaged area through external visual inspection, so there is no proper inspection method until actual leakage occurs.

종래에 적용된 배열 회수 보일러의 핀 튜브 검사방법은 의심되는 튜브와 연결된 헤더의 하부면을 절단한 후, 내시경검사를 통하여 육안점검을 시행해 왔다. 그런데, 이러한 검사방법은 국소적인 부분만 검사가 가능하여, 전수검사가 곤란할 뿐만 아니라 검사속도 또한 느리기 때문에 배열 회수 보일러에 설치된 핀 튜브의 점검 및 관리가 곤란하였다. 따라서, 복합 화력 발전소의 배열 회수 보일러 하향 핀 튜브의 내면 감육 및 결함상태를 검사할 수 있는 장치의 개발이 요구되고 있다.In the conventionally applied fin tube inspection method of the exhaust heat recovery boiler, visual inspection has been performed through endoscopy after cutting the lower surface of the header connected to the suspected tube. However, since this inspection method can inspect only a localized part, not only is it difficult to inspect the whole area, but also the inspection speed is slow, so it is difficult to inspect and manage the fin tube installed in the waste heat recovery boiler. Therefore, there is a need to develop a device capable of inspecting the inner surface thinning and defects of the heat recovery boiler down fin tube of a combined cycle power plant.

본 발명의 실시예는 복합 화력 발전소의 배열 회수 보일러 하향 핀 튜브의 내면 감육 및 결함상태를 안정적이고 용이하게 검사할 수 있는 배열 회수 보일러의 핀 튜브 검사장치를 제공하기 위한 것이다.An embodiment of the present invention is to provide a heat recovery boiler fin tube inspection device capable of stably and easily inspecting the inner surface thinning and defects of the heat recovery boiler downward fin tube of a combined cycle power plant.

본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치는 배열 회수 보일러의 헤더 내부에서 미리 설정된 검사경로를 따라 이동되며, 헤더에 연결된 핀 튜브 내부 표면 상태를 검사하는 센서부, 그리고 센서부의 일측에 구비되어 센서부를 검사경로를 따라 이동시키는 이동부를 포함한다.An apparatus for inspecting a fin tube of a heat recovery boiler according to an embodiment of the present invention moves along a preset inspection path inside the header of the heat recovery boiler, and includes a sensor unit that inspects the inner surface state of the fin tube connected to the header, and one side of the sensor unit. It includes a moving unit provided in and moving the sensor unit along the inspection path.

헤더는 길이방향을 따라 구비되며, 핀 튜브는 헤더의 길이방향을 따라 미리 설정된 간격을 갖고 이격되어 하향으로 구비될 수 있다.The header is provided along the longitudinal direction, and the fin tubes may be spaced apart at predetermined intervals along the longitudinal direction of the header and provided downward.

센서부는 길이방향으로 길게 튜브 형상으로 형성되는 센서 연결부, 그리고 센서 연결부의 일측에 결합되어 해당되는 센싱동작을 수행하는 헤드부를 포함할 수 있다.The sensor unit may include a sensor connection unit formed in a tube shape elongated in a longitudinal direction, and a head unit coupled to one side of the sensor connection unit to perform a corresponding sensing operation.

헤드부는 핀 튜브의 내면 결함 및 감육상태 측정을 위한 6개의 자기센서를 포함할 수 있다.The head part may include six magnetic sensors for measuring inner surface defects and thinning conditions of the fin tube.

센서부의 일측에 연결되며, 미리 설정된 조절각도로 헤드부를 회전시켜 핀 튜브의 내면에 헤드부가 접근 및 조절되어 핀 튜브의 내면과 헤드부 간 센터링(Centering)을 맞추도록 구동되는 각도조절 구동부를 더 포함할 수 있다.It is connected to one side of the sensor unit, and rotates the head at a preset adjustment angle to access and adjust the head to the inner surface of the fin tube to align the centering between the inner surface of the fin tube and the head. can do.

이동부는 본체부의 일측에 구비되어 센서부의 길이방향 이동과 하향 이동을 안내하는 가이드부, 그리고 본체부의 하측에 구비되어 본체부의 이동을 안내하는 회전부를 포함할 수 있다.The moving unit may include a guide unit provided on one side of the body unit to guide longitudinal movement and downward movement of the sensor unit, and a rotating unit provided on a lower side of the body unit to guide movement of the body unit.

회전부는 4개의 강자성체 휠(Wheel)을 포함할 수 있다.The rotating unit may include four ferromagnetic wheels.

휠은 각각 헤더의 내면에 접하도록 원추형으로 형성될 수 있다.Each of the wheels may be formed in a conical shape so as to contact the inner surface of the header.

이동부는 휠에 외력을 가해 휠을 전기적으로 구동시키는 크롤러 구동부를 더 포함할 수 있다.The moving unit may further include a crawler driving unit that electrically drives the wheel by applying an external force to the wheel.

이동부의 일측에 구비되어 센서부의 센싱동작을 보조하는 푸시풀러 구동부를 더 포함할 수 있다.It may further include a push puller driving unit provided on one side of the moving unit to assist the sensing operation of the sensor unit.

이동부에 구비된 내경 접촉용 강자성체 휠을 통해 안정적으로 헤더 내면에 부착시킬 수 있으며, 센서부의 정밀한 움직임을 보조하는 푸시풀러 구동부와 각도조절 구동부를 통하여 신속하고 정확하게 핀 튜브의 내면을 검사할 수 있기 때문에 전처리 작업을 통한 설비의 신뢰도를 개선시킬 수 있는 효과가 있다.It can be stably attached to the inner surface of the header through the ferromagnetic wheel for inner diameter contact provided in the moving part, and the inner surface of the fin tube can be inspected quickly and accurately through the push-puller drive unit and angle control drive unit that assist the precise movement of the sensor unit. Therefore, there is an effect of improving the reliability of the facility through the pretreatment work.

도 1은 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 도시한 도면이다.
도 2는 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 이용한 핀 튜브 내면의 결함신호 분석을 위해 제작된 핀 튜브 검사용 모형(Mock-up)에 대한 개략도이다.
도 3은 복합 화력 발전소에 구비된 배열 회수 보일러의 핀 튜브에서 발생되는 손상 사례를 도시한 도면이다.
도 4는 복합 화력 발전소에 구비된 배열 회수 보일러의 핀 튜브에서 주로 발생되는 손상위치를 도시한 도면이다.
도 5는 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 이용한 배열 회수 보일러 핀 튜브 검사 절차를 나타낸 흐름도이다.1 is a diagram showing a fin tube inspection device of a waste heat recovery boiler according to an embodiment of the present invention.
2 is a schematic view of a mock-up for fin tube inspection manufactured for analyzing a defect signal on the inner surface of a fin tube using a fin tube inspection device of a heat recovery boiler according to an embodiment of the present invention.
3 is a diagram illustrating a case of damage occurring in a fin tube of a waste heat recovery boiler provided in a combined cycle power plant.
FIG. 4 is a diagram showing a damage location mainly occurring in a fin tube of a waste heat recovery boiler provided in a combined cycle power plant.
5 is a flowchart illustrating a heat recovery boiler fin tube inspection procedure using a fin tube inspection device of a heat recovery boiler according to an embodiment of the present invention.

여기서 사용되는 전문용어는 단지 특정 실시예를 언급하기 위한 것이며, 본 발명을 한정하는 것을 의도하지 않는다. 여기서 사용되는 단수 형태들은 문구들이 이와 명백히 반대의 의미를 나타내지 않는 한 복수 형태들도 포함한다. 명세서에서 사용되는 "포함하는"의 의미는 특정 특성, 영역, 정수, 단계, 동작, 요소 및/또는 성분을 구체화하며, 다른 특정 특성, 영역, 정수, 단계, 동작, 요소, 성분 및/또는 군의 존재나 부가를 제외시키는 것은 아니다.The terminology used herein is intended only to refer to specific embodiments and is not intended to limit the present invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. As used herein, the meaning of "comprising" specifies specific characteristics, regions, integers, steps, operations, elements, and/or components, and other specific characteristics, regions, integers, steps, operations, elements, elements, and/or groups. does not exclude the presence or addition of

다르게 정의하지는 않았지만, 여기에 사용되는 기술용어 및 과학용어를 포함하는 모든 용어들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 일반적으로 이해하는 의미와 동일한 의미를 가진다. 보통 사용되는 사전에 정의된 용어들은 관련기술문헌과 현재 개시된 내용에 부합하는 의미를 가지는 것으로 추가 해석되고, 정의되지 않는 한 이상적이거나 매우 공식적인 의미로 해석되지 않는다.Although not defined differently, all terms including technical terms and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with related technical literature and currently disclosed content, and are not interpreted in ideal or very formal meanings unless defined.

이하, 첨부한 도면을 참조하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

도 1은 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 도시한 도면이며, 도 2는 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 이용한 핀 튜브 내면의 결함신호 분석을 위해 제작된 핀 튜브 검사용 모형(Mock-up)에 대한 개략도이다. 도 1 내지 도 2를 참조하면, 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치는 센서부, 이동부를 포함하며, 복합 화력 발전소의 배열 회수 보일러에서 헤더(10)에 하향으로 구비되는 핀 튜브(12)의 내면 감육 및 결함상태를 안정적이고 용이하게 검사할 수 있다.1 is a diagram showing a fin tube inspection device for a heat recovery boiler according to an embodiment of the present invention, and FIG. 2 is a defect signal on the inner surface of a fin tube using the fin tube inspection device for a heat recovery boiler according to an embodiment of the present invention. It is a schematic diagram of a mock-up for fin tube inspection manufactured for analysis. Referring to FIGS. 1 and 2 , an apparatus for inspecting a fin tube of a heat recovery boiler according to an embodiment of the present invention includes a sensor unit and a moving unit, and is provided downward to the header 10 in the heat recovery boiler of a combined cycle power plant. It is possible to stably and easily inspect the inner surface thinning and defects of the fin tube 12.

센서부는 배열 회수 보일러의 헤더(10) 내부에서 미리 설정된 검사경로를 따라 이동되며, 헤더(10)에 연결된 핀 튜브(12) 내부 표면 상태를 검사할 수 있다. 헤더(10)는 길이방향을 따라 구비되며, 핀 튜브(12)는 헤더(10)의 길이방향을 따라 미리 설정된 간격을 갖고 이격되어 하향으로 구비될 수 있다.The sensor unit moves along a preset inspection path inside the header 10 of the heat recovery boiler, and can inspect the inner surface state of the fin tube 12 connected to the header 10 . The header 10 is provided along the longitudinal direction, and the fin tubes 12 may be spaced apart at predetermined intervals along the longitudinal direction of the header 10 and provided downward.

센서부는 길이방향으로 길게 튜브 형상으로 형성되는 센서 연결부(30), 그리고 센서 연결부(30)의 일측에 결합되어 해당되는 센싱동작을 수행하는 헤드부(112)를 포함할 수 있다. 헤드부(112)는 핀 튜브(12)의 내면 결함 및 감육상태 측정을 위한 6개의 자기센서를 포함할 수 있다. 헤드부(112)는 핀 튜브(12)의 내면을 촬영하기 위한 카메라를 포함할 수 있다.The sensor unit may include a sensor connection unit 30 formed in a tube shape elongated in the longitudinal direction, and a head unit 112 coupled to one side of the sensor connection unit 30 to perform a corresponding sensing operation. The head part 112 may include six magnetic sensors for measuring inner surface defects and thinning conditions of the fin tube 12 . The head unit 112 may include a camera for photographing the inner surface of the fin tube 12 .

배열 회수 보일러의 헤더(10)에 설치된 핀 튜브(12)는 소정의 직경을 가지고 열전달을 돕기 위하여 튜브의 외면에 설치된 다수의 핀들을 가진 튜브들이 아래방향으로 배치되어 있다. 그리고 핀 튜브(12)들이 최소 5m 이상의 높이를 가지며 헤더(10)의 아래 방향으로 매달려 있다. 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치는 핀 튜브(12)의 특성을 고려하여 외면에서는 부착된 핀들로 인해 접근이 어렵기 때문에 헤더(10)의 내부를 통하여 헤더(10)와 연결된 튜브들의 내면 아래방향으로 센서부의 헤드부(112)가 이동할 수 있도록 형성할 수 있다.The fin tube 12 installed in the header 10 of the heat recovery boiler has a predetermined diameter, and tubes having a plurality of fins installed on the outer surface of the tube are disposed downward to help heat transfer. Further, the fin tubes 12 have a height of at least 5 m and are suspended downward from the header 10 . The fin tube inspection device of the heat recovery boiler according to the embodiment of the present invention considers the characteristics of the fin tube 12, and since it is difficult to access from the outside due to the attached fins, the header 10 is inspected through the inside of the header 10. It can be formed so that the head part 112 of the sensor unit can move in the downward direction of the inner surface of the tubes connected to.

한편, 센서부의 일측에 연결되며, 미리 설정된 조절각도로 헤드부(112)를 회전시켜 핀 튜브(12)의 내면에 헤드부(112)가 접근 및 조절되어 핀 튜브(12)의 내면과 헤드부(112) 간 센터링(Centering)을 맞추도록 구동되는 각도조절 구동부(160)를 더 포함할 수 있다. 각도조절 구동부(160)는 각도조절용 블록모터(Block Motor)를 포함할 수 있다. 센서부의 전면에 구비된 헤드부(112)와 연결된 각도조절 구동부(160)를 통하여 센서부의 헤드부(112)가 일정 각도 이내로 회전하도록 하여 헤더(10)의 아래 및 좌측과 우측에 각각 설치된 핀 튜브(12)의 내면에 안정적으로 접근 및 조절이 가능하다. On the other hand, it is connected to one side of the sensor unit, and the head unit 112 is approached and adjusted to the inner surface of the fin tube 12 by rotating the head unit 112 at a preset adjustment angle, so that the inner surface and the head unit of the fin tube 12 are connected to one side of the sensor unit. (112) may further include an angle adjustment driving unit 160 driven to match the centering (Centering). The angle adjustment driver 160 may include a block motor for angle adjustment. The head part 112 of the sensor part is rotated within a certain angle through the angle adjusting driving part 160 connected to the head part 112 provided on the front side of the sensor part, so that the header 10 is installed below and on the left and right sides, respectively. Pin tubes It is possible to stably approach and adjust the inner surface of (12).

이동부는 센서부의 일측에 구비되어 센서부를 검사경로를 따라 이동시킬 수 있다. 이동부는 본체부의 일측에 구비되어 센서부의 길이방향 이동과 하향 이동을 안내하는 가이드부, 그리고 본체부의 하측에 구비되어 본체부의 이동을 안내하는 회전부(102)를 포함할 수 있다. The moving unit may be provided on one side of the sensor unit to move the sensor unit along the inspection path. The moving unit may include a guide unit provided on one side of the body unit to guide longitudinal movement and downward movement of the sensor unit, and a rotation unit 102 provided on a lower side of the body unit to guide movement of the body unit.

가이드부는 센서 연결부(30)의 이동을 안내하기 위해 센서 가이드(110), 가이드 롤러(120), 호스 가이드 롤러(140)를 더 포함할 수 있다. 센서 연결부(30)가 튜브 형상으로 구비됨에 따라 호스 클램프가 구비될 수 있다. 참조 번호 20은 호스 클램프 노브이다.The guide unit may further include a sensor guide 110 , a guide roller 120 , and a hose guide roller 140 to guide the movement of the sensor connection unit 30 . As the sensor connection part 30 is provided in a tube shape, a hose clamp may be provided. Reference numeral 20 is a hose clamp knob.

회전부(102)는 4개의 강자성체 휠(Wheel)을 포함할 수 있다. 휠은 각각 헤더(10)의 내면에 접하도록 원추형(Cone)으로 형성될 수 있다. 4개의 휠들이 원추형으로 형성됨에 따라 각각 헤더(10) 내면의 굴곡진 부분에 안정적으로 부착될 수 있으며 헤더(10)의 내부에서 미세한 불연속면에 대응할 수 있다. 이동부에 구비된 내경 접촉용 강자성체 휠을 통해 안정적으로 헤더(10) 내면에 부착시킬 수 있다. 본체부의 하부에서 각 모서리에 설치된 4개의 휠(wheel)은 강자성체를 포함하기 때문에 헤더(10)의 내면에 접착시 쉽게 탈락되는 것을 방지할 수 있다.The rotation unit 102 may include four ferromagnetic wheels. Each of the wheels may be formed in a cone shape to come into contact with the inner surface of the header 10 . As the four wheels are formed in a conical shape, each wheel can be stably attached to the curved portion of the inner surface of the header 10 and can correspond to minute discontinuous surfaces inside the header 10 . It can be stably attached to the inner surface of the header 10 through the ferromagnetic wheel for inner diameter contact provided in the moving part. Since the four wheels installed at each corner of the lower part of the main body contain a ferromagnetic material, they can be prevented from easily falling off when adhering to the inner surface of the header 10.

한편, 이동부는 휠에 외력을 가해 휠을 전기적으로 구동시키는 크롤러 구동부(100)를 더 포함할 수 있다. 그리고 이동부의 일측에 구비되어 센서부의 센싱동작을 보조하는 푸시풀러 구동부(130)를 더 포함할 수 있다. 푸시풀러 구동부(130)는 푸시풀러 블록모터(Push Puller Block Motor)를 포함할 수 있다. 이동부의 일측에 구비된 푸시풀러 구동부(130)를 통해 센서부가 원활히 작동될 수 있다.Meanwhile, the moving unit may further include a crawler driving unit 100 that electrically drives the wheel by applying an external force to the wheel. And it may further include a push-puller driving unit 130 provided on one side of the moving unit to assist the sensing operation of the sensor unit. The push puller driving unit 130 may include a push puller block motor. The sensor unit can be smoothly operated through the push-puller driving unit 130 provided on one side of the moving unit.

이와 같이 센서부의 정밀한 움직임을 보조하는 푸시풀러 구동부(130)와 각도조절 구동부(160)를 통하여 신속하고 정확하게 복합 화력 발전소에 구비되는 배열 회수 보일러의 핀 튜브(12)의 내면상태를 검사할 수 있다.In this way, the inner state of the fin tube 12 of the waste heat recovery boiler provided in the combined cycle power plant can be inspected quickly and accurately through the push-puller drive unit 130 and the angle control drive unit 160 that assist the precise movement of the sensor unit. .

한편, 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치는 핀 튜브(12) 내부 세정용 동력전달을 위한 브러쉬 모터가 달린 브러쉬 컨트롤러(Brush Controller)를 포함할 수 있다. 그리고 이동부의 이동거리 측정을 위한 엔코더(Encoder), 이동부와 크롤러 구동부(100)를 이어주는 동력전달을 위한 케이블(10M), 브러쉬 모터와 브러쉬 튜브 및 회전축을 더 포함할 수 있다. 그리고 푸시풀러 구동부(130)와 연결된 타이밍 풀리 및 벨트(150)와 엔코더 텐션 스프링(Encorder Tension Spring)을 더 포함할 수 있으며, 핀 튜브(12) 내면에서 세정(Cleaning)장치의 정확한 이동거리를 산정할 수 있다.Meanwhile, the fin tube inspection device of the heat recovery boiler according to the embodiment of the present invention may include a brush controller with a brush motor for power transmission for cleaning the inside of the fin tube 12 . In addition, an encoder for measuring the moving distance of the moving unit, a cable 10M for power transmission connecting the moving unit and the crawler driving unit 100, a brush motor, a brush tube, and a rotation shaft may be further included. And it may further include a timing pulley and a belt 150 connected to the push puller driving unit 130 and an encoder tension spring, and calculating the accurate moving distance of the cleaning device from the inner surface of the pin tube 12 can do.

도 3은 복합 화력 발전소에 구비된 배열 회수 보일러의 핀 튜브(12)에서 발생되는 손상 사례를 도시한 도면이며, 도 4는 복합 화력 발전소에 구비된 배열 회수 보일러의 핀 튜브(12)에서 주로 발생되는 손상위치를 도시한 도면이다. 그리고 도 5는 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 이용한 배열 회수 보일러의 핀 튜브(12) 검사 절차를 나타낸 흐름도이다. 도 1 내지 도 5를 참조하여 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 이용한 배열 회수 보일러의 핀 튜브(12) 검사과정을 설명한다.FIG. 3 is a diagram showing a case of damage occurring in the fin tube 12 of the heat recovery boiler provided in the combined cycle power plant, and FIG. 4 is mainly caused by the fin tube 12 of the heat recovery boiler provided in the combined cycle power plant. It is a drawing showing the damaged location. 5 is a flowchart illustrating a procedure for inspecting the fin tube 12 of the heat recovery boiler using the fin tube inspection device of the heat recovery boiler according to an embodiment of the present invention. A process of inspecting the fin tube 12 of the exhaust heat recovery boiler using the fin tube inspection device of the exhaust heat recovery boiler according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5 .

먼저, 발전설비 중 배열 회수 보일러에 하향으로 설치된 핀 튜브(12)에 대한 검사를 위해 검사준비작업을 실시한다. 예를 들어, 배열 회수 보일러의 헤더(10) 내부 이송을 위한 이동부를 구동 컨트롤러와 연결하고, 센서부의 센싱상태를 모니터링 할 수 있는 모니터에 모니터 케이블을 연결한다(S510). 이어서, 배열 회수 보일러의 헤더(10) 내부로 이동부를 이송한다(S520). 그리고 센서부의 정밀한 움직임을 보조하는 푸시풀러 구동부(130)와 각도조절 구동부(160)를 통하여 신속하고 정확하게 핀 튜브(12)의 내면상태를 검사할 수 있도록 준비한다. 예를 들어, 푸시풀러 구동부(130)를 구동하여 센서부의 위치를 핀 튜브(12)의 근처까지 이동시킨다(S530). 그리고 각도조절 구동부(160)를 통하여 센서부의 헤드부(112)가 일정 각도 이내로 회전하도록 하여 핀 튜브(12)의 내면과 헤드부(112) 간 센터링(Centering)을 맞추도록 한다(S540). 이와 같이 센서부와 핀 튜브(12) 간의 센터링(Centering) 과정을 거쳐 센서부를 핀 튜브(12)와 일치시킨다(S550). 이후, 핀 튜브(12) 내면 검사를 위한 센서부를 핀 튜브(12)의 내면으로 하향 이동시켜 핀 튜브(12)의 내면에 있는 결함(12a) 및 스케일(Scale) 등 튜브의 전수검사를 수행한다(S560). 센서부의 검사결과는 별도의 표시부를 통해 표시될 수 있으며, 메모리부에 저장될 수 있다(S570).First, an inspection preparation work is performed for the inspection of the fin tube 12 installed downward in the waste heat recovery boiler among power generation facilities. For example, a moving unit for transferring the inside of the header 10 of the heat recovery boiler is connected to a driving controller, and a monitor cable is connected to a monitor capable of monitoring the sensing state of the sensor unit (S510). Subsequently, the moving part is transferred to the inside of the header 10 of the heat recovery boiler (S520). And prepare to quickly and accurately inspect the inner state of the fin tube 12 through the push-puller drive unit 130 and the angle adjustment drive unit 160 that assist the precise movement of the sensor unit. For example, by driving the push puller driver 130, the position of the sensor unit is moved to the vicinity of the fin tube 12 (S530). In addition, the head portion 112 of the sensor unit is rotated within a certain angle through the angle adjusting driver 160 to align the centering between the inner surface of the fin tube 12 and the head portion 112 (S540). In this way, the sensor unit is aligned with the fin tube 12 through a centering process between the sensor unit and the fin tube 12 (S550). Thereafter, the sensor unit for inspecting the inner surface of the fin tube 12 is moved downward to the inner surface of the fin tube 12 to perform a total inspection of the tube such as defects 12a and scale on the inner surface of the fin tube 12. (S560). The inspection result of the sensor unit may be displayed through a separate display unit and may be stored in a memory unit (S570).

상기한 바와 같이 본 발명의 실시예에 따른 배열 회수 보일러의 핀 튜브 검사장치를 이용하면, 배열 회수 보일러에 설치된 핀 튜브(12)의 내면 감육 및 결함상태 측정을 안정적이고 용이하게 실시할 수 있다. 복합 화력 발전소의 발전설비 중 배열 회수 보일러의 헤더(10)에서 하향으로 설치된 핀 튜브(12)의 감육 및 결함 검출을 위하여 이동부를 헤더(10)의 내부에 장착한 후 초당 10cm의 이동속도로 이동부를 구동시켜 원격에서 배열 회수 보일러에 설치된 핀 튜브(12)의 내면을 안정적이고 빠르게 검사함으로써 보다 정확한 핀 튜브(12) 상태진단을 구현할 수 있다.As described above, if the fin tube inspection device of the heat recovery boiler according to the embodiment of the present invention is used, it is possible to stably and easily measure the inner surface thinning and defect state of the fin tube 12 installed in the heat recovery boiler. For the thinning and defect detection of the fin tube 12 installed downward in the header 10 of the heat recovery boiler among the power generation facilities of the combined cycle power plant, the moving part is mounted inside the header 10 and moves at a moving speed of 10 cm per second. A more accurate condition diagnosis of the fin tube 12 can be realized by stably and quickly inspecting the inner surface of the fin tube 12 installed in the heat recovery boiler remotely by driving the unit.

이상을 통해 본 발명의 바람직한 실시예에 대하여 설명하였지만, 본 발명은 여기에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 다양하게 변형하여 실시하는 것이 가능하고, 이것도 또한 본 발명의 범위에 속하는 것은 당연하다.Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and it is possible to carry out various modifications within the scope of the claims and the detailed description of the invention and the accompanying drawings, and this is also It goes without saying that it falls within the scope of the present invention.

10 ; 헤더 12 ; 핀 튜브
20 ; 호스 클램프 노브 30 ; 센서 연결부
100 ; 크롤러 구동부 102 ; 회전부
110 ; 센서 가이드 112 ; 헤드부
120 ; 가이드 롤러 130 ; 푸시풀러 구동부
140 ; 호스 가이드 롤러 150 ; 타이밍풀리 및 벨트
160 ; 각도조절 구동부10; header 12 ; fin tube
20; Hose clamp knob 30 ; sensor connection
100; Crawler driving unit 102; reel
110; sensor guide 112; head part
120; guide roller 130; push puller driving part
140; Hose guide roller 150; timing pulley and belt
160; angle adjustment drive

Claims (4)

배열 회수 보일러의 헤더 내부에서 미리 설정된 검사경로를 따라 이동되며, 상기 헤더에 연결된 핀 튜브 내부 표면 상태를 검사하는 센서부, 그리고
상기 센서부의 일측에 구비되어 상기 센서부를 상기 검사경로를 따라 이동시키는 이동부
를 포함하며,
상기 이동부는
본체부의 일측에 구비되어 상기 센서부의 길이방향 이동과 하향 이동을 안내하는 가이드부, 그리고
상기 본체부의 하측에 구비되어 상기 본체부의 이동을 안내하는 회전부
를 포함하고,
상기 회전부는 4개의 강자성체 휠을 포함하며,
상기 이동부는
상기 휠에 외력을 가해 상기 휠을 전기적으로 구동시키는 크롤러 구동부, 그리고
상기 이동부의 일측에 구비되어 상기 센서부의 센싱동작을 보조하는 푸시풀러 구동부를 더 포함하고
상기 헤더는 길이방향을 따라 구비되며, 상기 핀 튜브는 상기 헤더의 길이방향을 따라 미리 설정된 간격을 갖고 이격되어 하향으로 구비되는 배열 회수 보일러의 핀 튜브 검사장치.A sensor unit that moves along a preset inspection path inside the header of the heat recovery boiler and inspects the inner surface state of the fin tube connected to the header, and
A moving unit provided at one side of the sensor unit to move the sensor unit along the inspection path
Including,
the moving part
A guide unit provided on one side of the body unit to guide longitudinal movement and downward movement of the sensor unit, and
A rotating part provided on the lower side of the main body to guide the movement of the main body
including,
The rotating part includes four ferromagnetic wheels,
the moving part
A crawler driving unit for electrically driving the wheel by applying an external force to the wheel, and
Further comprising a push-pull driver provided on one side of the moving unit to assist the sensing operation of the sensor unit
The header is provided along the longitudinal direction, and the fin tube is provided downwardly at a preset interval along the longitudinal direction of the header. 제1항에서,
상기 센서부는
길이방향으로 길게 튜브 형상으로 형성되는 센서 연결부, 그리고
상기 센서 연결부의 일측에 결합되어 해당되는 센싱동작을 수행하는 헤드부를 포함하는 배열 회수 보일러의 핀 튜브 검사장치.In paragraph 1,
The sensor part
A sensor connection formed in a tube shape long in the longitudinal direction, and
A fin tube inspection device for a heat recovery boiler comprising a head unit coupled to one side of the sensor connection unit to perform a corresponding sensing operation. 제2항에서,
상기 헤드부는 상기 핀 튜브의 내면 결함 및 감육상태 측정을 위한 6개의 자기센서를 포함하는 배열 회수 보일러의 핀 튜브 검사장치.In paragraph 2,
The finned tube inspection device of the heat recovery boiler including six magnetic sensors for measuring inner surface defects and thinning conditions of the finned tube. 제2항에서,
상기 센서부의 일측에 연결되며, 미리 설정된 조절각도로 상기 헤드부를 회전시켜 상기 핀 튜브의 내면에 상기 헤드부가 접근 및 조절되어 상기 핀 튜브의 내면과 상기 헤드부 간 센터링(Centering)을 맞추도록 구동되는 각도조절 구동부를 더 포함하는 배열 회수 보일러의 핀 튜브 검사장치.In paragraph 2,
It is connected to one side of the sensor part, and rotates the head part at a preset adjustment angle so that the head part approaches and adjusts the inner surface of the fin tube to match the centering between the inner surface of the fin tube and the head part. A fin tube inspection device for a heat recovery boiler further comprising an angle adjustment driving unit.
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E601 Decision to refuse application
X091 Application refused [patent]
E902 Notification of reason for refusal