KR102338571B1 - Heat exchange tube of ammonia refrigerator for marine vessel and manufacturing method thereof - Google Patents

Heat exchange tube of ammonia refrigerator for marine vessel and manufacturing method thereof Download PDF

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Publication number
KR102338571B1
KR102338571B1 KR1020210036136A KR20210036136A KR102338571B1 KR 102338571 B1 KR102338571 B1 KR 102338571B1 KR 1020210036136 A KR1020210036136 A KR 1020210036136A KR 20210036136 A KR20210036136 A KR 20210036136A KR 102338571 B1 KR102338571 B1 KR 102338571B1
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South Korea
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tube body
heat exchange
tube
ammonia
manufacturing
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KR1020210036136A
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Korean (ko)
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이흥우
이상훈
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이흥우
이상훈
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/26—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for frozen goods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/12—Heating; Cooling
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/38—Wires; Tubes
    • C23C2/385—Tubes of specific length

Abstract

The present invention relates to an ammonia freezer for a ship, which uses seawater as cooling water. More specifically, the present invention relates to a heat exchange tube of an ammonia freezer for a ship and a manufacturing method thereof, which are able to prevent static electricity and corrosion from being caused by seawater. According to the present invention, the manufacturing method of a heat exchange tube (100) of an ammonia freezer for a ship comprises: a first step of forming a zinc plated layer (120) on the inner circumferential surface and the outer circumferential surface of a tube main body (110); a second step of sealing both ends of the tube main body; a third step of spreading hydrochloric acid on the surface of the sealed tube main body, and removing the zinc-plated layer formed on the outer circumferential surface of the tube main body; a fourth step of forming an anti-rust coated layer (130) on the outer circumferential surface of the tube main body; and a fifth step of opening both ends of the sealed tube main body.

Description

선박용 암모니아 냉동기의 열교환 튜브 및 그 제조방법{Heat exchange tube of ammonia refrigerator for marine vessel and manufacturing method thereof}Heat exchange tube of ammonia refrigerator for marine vessel and manufacturing method thereof

본 발명은 해수를 냉각수로 이용하는 선박용 암모니아 냉동기에 관한 것으로서, 보다 상세하게는 해수에 의한 정전기 및 부식 발생을 방지할 수 있는 선박용 암모니아 냉동기의 열교환 튜브 및 그 제조방법에 관한 것이다.The present invention relates to a marine ammonia refrigerator using seawater as cooling water, and more particularly, to a heat exchange tube for a marine ammonia refrigerator capable of preventing static electricity and corrosion caused by seawater, and a method for manufacturing the same.

일반적으로 해양에서 포획된 어류들은 신선도를 유지하기 위하여 포획 즉시 선체에 마련된 냉동고에 보관하게 된다.In general, fish caught in the sea are stored in a freezer provided on the hull immediately after capture in order to maintain freshness.

따라서, 해양 선박에는 기본적으로 냉동설비가 갖추어져 있으며, 통상 가격이 저렴하고 효율이 우수하여 제빙, 냉동용으로 적합한 암모니아 냉매를 이용한 냉동기가 널리 사용된다.Accordingly, marine vessels are basically equipped with refrigeration facilities, and a refrigerator using ammonia refrigerant suitable for ice making and refrigeration is widely used because of its low price and excellent efficiency.

도 1은 종래의 선박용 암모니아 냉동기의 열교환 튜브의 사용상태 단면도로서, 도시된 바와 같이, 종래의 선박용 암모니아 냉동기는 열교환 튜브(10)의 내부로 냉각수를 순환시켜 온도가 상승한 암모니아 냉매의 온도를 식혀주게 되는 바, 상기 냉각수로는 어선의 특성상 주변에서 무제한으로 쉽게 제공 받을 수 있는 해수를 이용한다.1 is a cross-sectional view of a heat exchange tube of a conventional marine ammonia refrigerator, as shown, in a conventional marine ammonia refrigerator, cooling water is circulated into the heat exchange tube 10 to cool the temperature of the ammonia refrigerant whose temperature has risen As the cooling water, seawater that can be easily provided unlimitedly in the vicinity is used due to the nature of the fishing vessel.

그러나, 종래의 선박용 암모니아 냉동기의 열교환 튜브(10)는 내측으로 해수가 항시 흐르고 있기 때문에 해수에 포함된 작은 크기의 갑각류나 어패류들이 내주면에 달라 붙어 냉각수의 흐름을 방해하게 되고 냉각수의 흐름이 불량해지면서 냉각성능이 떨어지게 되는 문제를 가진다.However, since seawater always flows inside the conventional heat exchange tube 10 of the ammonia refrigerator for ships, small-sized crustaceans or fish and shellfish contained in the seawater adhere to the inner circumferential surface, obstructing the flow of the coolant, and the coolant flow is poor. There is a problem in that the cooling performance decreases as the temperature increases.

아울러, 종래의 선박용 암모니아 냉동기의 열교환 튜브(10)는 해수의 특성상 열교환 튜브(10) 내에서 유동하는 과정에서 정전기를 발생시킨다. 이러한 정전기는 열교환 튜브(10)를 비롯한 금속 소재의 부재들을 타고 이동하면서 선박 내의 갖가지 전기적인 문제를 일으키게 된다.In addition, the heat exchange tube 10 of the conventional marine ammonia refrigerator generates static electricity in the process of flowing in the heat exchange tube 10 due to the nature of seawater. Such static electricity causes various electrical problems in the ship while moving on the members of the metal material including the heat exchange tube 10 .

국내공개특허공보 제10-2016-0095925호Domestic Patent Publication No. 10-2016-0095925

본 발명은 상기한 문제점들을 해결하기 위해 안출된 것으로서, 해수에 포함된 갑각류나 어패류가 달라붙지 않으면서 해수의 흐름으로 유발되는 정전기 발생이 방지되는 선박용 암모니아 냉동기의 열교환 튜브 및 그 제조방법을 제공함에 목적이 있다.The present invention has been devised to solve the above problems, and provides a heat exchange tube for a marine ammonia refrigerator and a method for manufacturing the same, which prevents the generation of static electricity caused by the flow of seawater without sticking to the crustaceans or shellfish contained in the seawater. There is a purpose.

상기 목적을 달성하기 위해, 본 발명의 선박용 암모니아 냉동기의 열교환 튜브의 제조방법은 튜브 본체의 내주면과 외주면에 아연도금층을 형성시키는 제1단계와, 튜브 본체의 양단을 밀봉하는 제2단계와, 밀봉된 튜브 본체의 표면에 염산을 도포하여 튜브 본체의 외주면에 형성된 아연도금층을 제거하는 제3단계와, 튜브 본체의 외주면에 방청코팅층을 형성시키는 4단계와 밀봉된 튜브 본체의 양단을 개방시키는 제5단계를 포함한다.In order to achieve the above object, the method for manufacturing a heat exchange tube for a marine ammonia refrigerator of the present invention includes a first step of forming a galvanized layer on the inner and outer circumferential surfaces of a tube body, a second step of sealing both ends of the tube body, and sealing A third step of removing the galvanized layer formed on the outer circumferential surface of the tube body by applying hydrochloric acid to the surface of the tube body, a fourth step of forming an anti-rust coating layer on the outer circumferential surface of the tube body, and a fifth step of opening both ends of the sealed tube body includes steps.

또한, 상기 제4단계 이전에 끊는 물이 담겨진 중화탱크에 상기 튜브 본체를 투입하여 튜브 본체의 표면에 잔존하는 염산을 제거하는 단계를 더 거치도록 할 수 있다.In addition, before the fourth step, a step of removing hydrochloric acid remaining on the surface of the tube body by putting the tube body into a neutralization tank containing boiling water may be further performed.

한편, 상기 제1단계는 튜브 본체를 아연 용융조에 투입하여 이루어지도록 하는 것이 바람직하다.On the other hand, it is preferable that the first step is made by putting the tube body into the zinc smelting bath.

그리고 본 발명은 상기한 방법을 통해 제조된 선박용 암모니아 냉동기의 열교환 튜브를 제공한다.And the present invention provides a heat exchange tube of the ammonia refrigerator for ships manufactured through the above method.

아울러, 상기 튜브 본체는 이음매가 없는 강관 형태로 이루어지는 것이 좋다.In addition, it is preferable that the tube body is made in the form of a seamless steel pipe.

상기와 같이 구성된 본 발명은 튜브 본체의 내주면에 아연도금층이 형성되어 있기 때문에 튜브 본체 내부를 유동하는 해수에 포함된 갑각류나 어패류가 튜브 본체의 내주면에 달라 붙는 것이 방지되고 해수에 의한 정전기 발생이 억제되는 효과가 있다.In the present invention configured as described above, since the galvanized layer is formed on the inner circumferential surface of the tube body, crustaceans or seafood contained in the seawater flowing inside the tube body is prevented from sticking to the inner circumferential surface of the tube body, and static electricity generation by seawater is suppressed. has the effect of being

아울러, 본 발명은 튜브 본체의 양단을 밀봉시키는 방식을 이용하여 튜브 본체의 내주면에는 아연도금층을 형성시키고 튜브 본체의 외주면에는 방청코팅층을 용이하게 형성시킬 수 있는 효과가 있다.In addition, the present invention has the effect of forming a galvanized layer on the inner circumferential surface of the tube body and easily forming an anti-rust coating layer on the outer circumferential surface of the tube body by using a method of sealing both ends of the tube body.

도 1은 종래의 선박용 암모니아 냉동기의 열교환 튜브의 사용상태 단면도.
도 2는 본 발명에 따른 선박용 암모니아 냉동기의 열교환 튜브의 단면도.
도 3은 본 발명에 따른 선박용 암모니아 냉동기의 열교환 튜브의 제조방법을 순서대로 나타내는 블럭도.
도 4 내지 도 5는 본 발명에 따른 선박용 암모니아 냉동기의 열교환 튜브의 제조방법을 순서대로 나타내는 도면.1 is a cross-sectional view of a state of use of a heat exchange tube of a conventional marine ammonia refrigerator.
Figure 2 is a cross-sectional view of the heat exchange tube of the ammonia refrigerator for ships according to the present invention.
3 is a block diagram sequentially showing a method for manufacturing a heat exchange tube of an ammonia refrigerator for a ship according to the present invention.
4 to 5 are views sequentially showing a method of manufacturing the heat exchange tube of the ammonia refrigerator for ships according to the present invention.

본 발명의 특징 및 이점들은 첨부도면에 의거한 다음의 바람직한 실시예에 대한 상세한 설명으로 더욱 명백해질 것이다.The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments, taken in conjunction with the accompanying drawings.

이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 발명자가 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Prior to this, the terms or words used in the present specification and claims are based on the technical idea of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best describe his invention. It must be interpreted with a corresponding meaning and concept.

아울러, 본 명세서 및 청구범위에 사용된 용어나 단어는 단지 특정한 실시예를 설명하기 위해 사용된 것으로, 본 발명을 한정하려는 의도가 아니다.In addition, the terms or words used in the specification and claims are used only to describe specific embodiments, and are not intended to limit the present invention.

예컨대, 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. 아울러, "포함한다" 또는 "구비한다" 또는 "가진다" 등의 용어는 명세서상에 기재된 특징, 숫자, 단계, 동작, 구성요소, 부분품 또는 이들을 조합한 것이 존재함을 지정하려는 것이지 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부분품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.For example, the singular expression includes the plural expression unless the context clearly dictates otherwise. In addition, terms such as "comprises" or "comprising" or "having" are intended to designate the existence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more It should be understood that this does not preclude the possibility of addition or existence of other features or numbers, steps, operations, components, parts, or combinations thereof.

또한, 층, 막, 영역, 판 등의 부분이 다른 부분 "위에" 있다고 할 경우, 이는 다른 부분 "바로 위에" 있는 경우 뿐만 아니라 그 중간에 또 다른 부분이 있는 경우도 포함한다. 반대로 층, 막, 영역, 판 등의 부분이 다른 부분 "아래에" 있다고 할 경우, 이는 다른 부분 "바로 아래에" 있는 경우 뿐만 아니라 그 중간에 또 다른 부분이 있는 경우도 포함한다.In addition, when a part of a layer, film, region, plate, etc. is said to be "on" another part, this includes not only the case where it is "directly on" another part, but also the case where there is another part in between. Conversely, when a part of a layer, film, region, plate, etc. is said to be "under" another part, this includes not only cases where it is "directly under" another part, but also a case where another part is in between.

아울러, 본 명세서에서 사용한 "제1", "제2" 등과 같이 서수를 포함하는 용어는 다양한 구성요소들을 설명하는데 사용될 수 있지만, 상기 구성요소들은 상기 용어들에 의해 한정되지는 않으며, 상기 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로만 사용된다.In addition, terms including an ordinal number such as "first", "second", etc. used herein may be used to describe various elements, but the elements are not limited by the terms, and the terms are It is used only for the purpose of distinguishing one component from another.

이하, 본 발명의 일 실시예를 도면을 참조하여 상세히 설명함에 있어, 동일한 구성에 대해서는 동일한 부호를 사용하며, 명료성을 위하여 가능한 중복되지 않게 상이한 부분만을 주로 설명한다.Hereinafter, in describing an embodiment of the present invention in detail with reference to the drawings, the same reference numerals are used for the same components, and for the sake of clarity, only different parts are mainly described so as not to overlap as much as possible.

도 2는 본 발명에 따른 선박용 암모니아 냉동기의 열교환 튜브의 단면도로서, 도시된 바와 같이, 본 발명의 선박용 암모니아 냉동기의 열교환 튜브(100)는 튜브 본체(110)와 상기 튜브 본체(110)의 내주면에 형성된 아연도금층(120)과 상기 튜브 본체(110)의 외주면에 형성된 방청코팅층(130)으로 구성된다.2 is a cross-sectional view of the heat exchange tube of the ammonia refrigerator for ships according to the present invention, as shown, the heat exchange tube 100 of the ammonia refrigerator for ships of the present invention is the tube body 110 and the inner peripheral surface of the tube body 110. It is composed of the formed galvanized layer 120 and the anti-rust coating layer 130 formed on the outer peripheral surface of the tube body 110 .

상기 튜브 본체(110)는 열교환에 있어서 우수한 성능을 발휘할 수 있도록 열전도가 우수한 강재로 제작된다.The tube body 110 is made of a steel material having excellent heat conduction so as to exhibit excellent performance in heat exchange.

이 경우, 상기 튜브 본체(110)는 고온에 잘 견디고 및 연신율이 낮아 용접 배관에 적합한 ASTM-A106 규격의 튜브가 바람직하다.In this case, the tube body 110 is preferably a tube of ASTM-A106 standard suitable for welding piping because it can withstand high temperatures well and has a low elongation.

이와 같이 튜브 본체(110)가 용접이 가능할 뿐만 아니라 용접시 변형을 최소화할 수 있는 소재로 제작되면 용접을 통해 합관 및 교체 작업을 매우 쉽고 간편하게 수행할 수 있게 되며 용접과정에서 발생되는 불량도 최소화시킬 수 있게 된다.As such, when the tube body 110 is made of a material that can be welded and minimized deformation during welding, it is possible to perform welding and replacement work very easily and conveniently, and to minimize defects generated in the welding process. be able to

아울러, 상기 튜브 본체(110)는 전둘레에 걸쳐 조직 및 경도가 균일하여 용접에 의한 열영향부의 취약성이 없고, 용접부위가 깨지거나 부식이 발생되면서 암모니아 냉매가 내부로 유입되거나 내부의 냉각수가 외부로 유출될 위험이 없도록 이음매 없는 강관 형태(seamless type)로 제작된 것이 바람직하다.In addition, the tube body 110 has a uniform structure and hardness over the entire circumference, so there is no vulnerability of the heat-affected zone by welding, and as the welding site is broken or corrosion occurs, ammonia refrigerant flows into the inside or the internal cooling water is external. It is preferable that it is manufactured in a seamless type so that there is no risk of leakage into the furnace.

한편, 상기 아연도금층(120)은 아연의 특성상 기본적으로 튜브 본체(110) 내부를 유동하는 해수에 의한 튜브 본체(110)의 부식을 막아준다.On the other hand, the zinc plating layer 120 basically prevents corrosion of the tube body 110 by seawater flowing inside the tube body 110 due to the characteristics of zinc.

또한, 상기 아연도금층(120)은 강재의 튜브 본체(110)에 비하여 상대적으로 표면이 매끄럽기 때문에 튜브 본체(110) 내부를 유동하는 해수에 포함된 갑각류나 어패류가 튜브 본체(110)의 내주면에 달라 붙는 것을 방지해 준다.In addition, since the galvanized layer 120 has a relatively smooth surface compared to the steel tube body 110, crustaceans or shellfish contained in the seawater flowing inside the tube body 110 are on the inner circumferential surface of the tube body 110. prevent sticking.

아울러, 상기 아연도금층(120)은 강재의 튜브 본체(110)에 비하여 이온화 경향이 크기 때문에 튜브 본체(110) 내부를 유동하는 해수에 의한 정전기 발생을 억제시켜 준다.In addition, since the galvanized layer 120 has a greater ionization tendency than the steel tube body 110 , it suppresses the generation of static electricity due to seawater flowing inside the tube body 110 .

이와 같은 아연도금층(120)은 적어도 12미크론 이상의 두께를 갖도록 형성되는 것이 바람직하다.The galvanized layer 120 is preferably formed to have a thickness of at least 12 microns or more.

왜냐하면 아연도금층(120)이 12 미크론 이하의 두께로 형성되면 아연도금층(120)이 유동하는 해수에 의하여 쉽게 소실되므로 장기간에 걸쳐 튜브 본체(110)를 보호해 줄 수 없기 때문이다.This is because, when the galvanized layer 120 is formed to a thickness of 12 microns or less, the galvanized layer 120 is easily lost by flowing seawater, and thus cannot protect the tube body 110 for a long period of time.

한편, 상기 방청코팅층(130)은 튜브 본체(110)의 외주면에 형성되어 암모니아 냉매와의 접촉으로 인한 튜브 본체의 부식을 방지해 준다.Meanwhile, the anti-corrosive coating layer 130 is formed on the outer peripheral surface of the tube body 110 to prevent corrosion of the tube body due to contact with the ammonia refrigerant.

이와 같이 구성된 본 발명에 따른 선박용 암모니아 냉동기의 열교환 튜브(100)는 다음과 같은 방법으로 제조된다.The heat exchange tube 100 of the ammonia refrigerator for ships according to the present invention configured as described above is manufactured in the following way.

도 3은 본 발명에 따른 선박용 암모니아 냉동기의 열교환 튜브의 제조방법을 순서대로 나타내는 블럭도이고, 도 4 내지 도 6은 본 발명에 따른 선박용 암모니아 냉동기의 열교환 튜브의 제조방법을 순서대로 나타내는 도면으로서, 도시된 바와 같이, 먼저 튜브 본체(110)의 내주면과 외주면에 아연도금층(120)을 형성시킨다.(S1)3 is a block diagram sequentially showing a method for manufacturing a heat exchange tube for a marine ammonia refrigerator according to the present invention, and FIGS. 4 to 6 are views sequentially showing a method for manufacturing a heat exchange tube for a marine ammonia refrigerator according to the present invention, As shown, first, a galvanized layer 120 is formed on the inner peripheral surface and the outer peripheral surface of the tube body 110. (S1)

상기 아연도금층(120)은 아연 용융조(T1)에 튜브 본체(110)를 투입하는 방식으로 형성시킨다.The galvanized layer 120 is formed by injecting the tube body 110 into the zinc molten bath T1.

이와 같이 아연용융방식으로 아연도금층(120)을 형성시키면 12미크론 이상의 두꺼운 아연도금층(120)을 얻을 수 있게 되며, 튜브 본체(110)의 내식성을 장기간 동안 안정되게 유지시킬 수 있게 된다.When the galvanized layer 120 is formed by the molten zinc method in this way, a thick galvanized layer 120 of 12 microns or more can be obtained, and the corrosion resistance of the tube body 110 can be stably maintained for a long period of time.

튜브 본체(110)의 내주면과 외주면에 아연도금층(120)이 형성되면 튜브 본체(110)의 양단을 밀봉한다.(S2)When the galvanized layer 120 is formed on the inner and outer peripheral surfaces of the tube body 110, both ends of the tube body 110 are sealed. (S2)

이 경우, 튜브 본체(110)의 양단에 별도의 밀봉캡(C)을 끼워 넣는 방식으로 이루어진다.In this case, a separate sealing cap (C) is inserted into both ends of the tube body 110 in a manner.

튜브 본체(110)의 양단이 밀봉되면, 밀봉된 튜브 본체(110)의 표면에 염산을 도포하여 튜브 본체(110)의 표면으로부터 아연도금층(120)을 제거한다.(S3)When both ends of the tube body 110 are sealed, hydrochloric acid is applied to the surface of the sealed tube body 110 to remove the galvanized layer 120 from the surface of the tube body 110. (S3)

상기 튜브 본체(110)의 표면에 형성된 아연도금층(120)이 제거되면, 튜브 본체(110)의 표면과 암모니아 냉매와의 열교환이 원활하게 이루어지게 된다.When the galvanized layer 120 formed on the surface of the tube body 110 is removed, heat exchange between the surface of the tube body 110 and the ammonia refrigerant is smoothly performed.

만일 튜브 본체(110)의 표면에 형성된 아연도금층(120)이 제거되지 않으면, 상기 튜브 본체(110)의 표면과 암모니아 냉매와의 열교환이 원활하게 이루어지지 않게 되는 것은 물론, 아연도금층(120)이 암모니아 냉매와 접촉하여 녹아내리면서 냉매유로 및 밸브 등의 틈새를 막아 냉동기 전반에 걸쳐 다양한 고장을 일으키게 된다.If the galvanized layer 120 formed on the surface of the tube body 110 is not removed, heat exchange between the surface of the tube body 110 and the ammonia refrigerant is not performed smoothly, and the galvanized layer 120 is not removed. As it comes into contact with the ammonia refrigerant, it melts and blocks the gaps in the refrigerant passage and valve, causing various failures throughout the refrigerator.

튜브 본체(110)의 표면에 형성된 아연도금층(120)이 제거되면 튜브 본체(110)의 표면에 잔존하는 염산을 제거한다.When the galvanized layer 120 formed on the surface of the tube body 110 is removed, hydrochloric acid remaining on the surface of the tube body 110 is removed.

이 경우, 상기 염산은 끊는 물이 담겨진 중화탱크(T2)에 상기 튜브 본체(110)를 투입하여 제거할 수 있다.In this case, the hydrochloric acid can be removed by putting the tube body 110 into the neutralization tank T2 containing boiling water.

상기 튜브 본체(110)는 중화탱크(T2) 내에서 12시간 이상 투입시켜 염산성분을 완벽하게 제거하도록 하며, 12시간 경과 후 튜브 본체(110)를 중화탱크(T2)로부터 꺼낸 후에 상온에서 자연 건조시킨다.The tube body 110 is put in the neutralization tank T2 for more than 12 hours to completely remove the hydrochloric acid component, and after 12 hours have elapsed, the tube body 110 is taken out from the neutralization tank T2 and naturally dried at room temperature. make it

튜브 본체(110)의 건조가 완료되면, 튜브 본체(110)의 표면에 방청코팅층(130)을 형성시킨다.(S4)When the drying of the tube body 110 is completed, the anti-rust coating layer 130 is formed on the surface of the tube body 110. (S4)

상기 방청코팅층(130)은 방청유가 튜브 본체(110)의 표면에 일정한 두께로 균일하게 코팅되도록 튜브 본체(110)의 표면에 방청유를 살포하는 방식으로 이루어진다.The anti-rust coating layer 130 is made in a way that the anti-rust oil is sprayed on the surface of the tube body 110 so that the anti-rust oil is uniformly coated on the surface of the tube body 110 to a predetermined thickness.

이와 같이 튜브 본체(110)에 방청코팅층(130)이 형성되면 튜브 본체(110)의 표면의 내식성이 향상되면서 부식이 방지된다. 특히 튜브 본체(110)의 표면이 암모니아와의 지속적인 접촉으로 부식되는 것을 효과적으로 막을 수 있게 된다.When the anticorrosive coating layer 130 is formed on the tube body 110 in this way, corrosion resistance of the surface of the tube body 110 is improved and corrosion is prevented. In particular, it is possible to effectively prevent the surface of the tube body 110 from being corroded by continuous contact with ammonia.

튜브 본체(110)에 방청코팅층(130)이 형성되면 튜브 본체(110)를 상온에서 일정기간 방치하여 건조시킨 다음 밀봉된 튜브 본체(110)의 양단을 개방시킨다.(S5)When the anti-corrosive coating layer 130 is formed on the tube body 110, the tube body 110 is left at room temperature for a certain period of time to dry, and then both ends of the sealed tube body 110 are opened. (S5)

이렇게 하면 튜브 본체(110)의 내주면에 아연도금층(120)이 형성되고 외주면에는 방청코팅층(130)이 형성된 도 2에 도시된 바와 같은 선박용 암모니아 냉동기의 열교환 튜브(100)의 제조가 완료된다.In this way, the galvanized layer 120 is formed on the inner circumferential surface of the tube body 110 and the anti-rust coating layer 130 is formed on the outer circumferential surface, as shown in FIG. 2 , the manufacture of the heat exchange tube 100 of the ammonia refrigerator for ships is completed.

이와 같이, 도면을 참조하여 본 발명의 바람직한 실시예에 대해 상술하였으나 본 발명은 전술한 실시예에 한정되지 않으며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진자가 본 발명의 사상을 벗어나지 않고 변형 가능하며, 이러한 변형은 본 발명의 권리범위에 속할 것이다.As such, although preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above-described embodiments, and those skilled in the art to which the present invention pertains can modify without departing from the spirit of the present invention It is possible, and such modifications will fall within the scope of the present invention.

100...열교환 튜브 110...튜브 본체
120...아연도금층 130...방청코팅층
T2...중화탱크 T1...아연 용융조100...heat exchange tube 110...tube body
120...Galvanized layer 130...Anti-rust coating layer
T2...neutralization tank T1...zinc melting tank

Claims (5)

이음매 없는 강관 형태로 제작된 튜브 본체의 내주면과 외주면에 아연도금층을 12미크론 이상의 두께를 갖도록 형성시키는 제1단계;
튜브 본체의 양단을 밀봉하는 제2단계;
밀봉된 튜브 본체의 표면에 염산을 도포하여 튜브 본체의 외주면에 형성된 아연도금층을 제거하는 제3단계;
튜브 본체의 외주면에 방청코팅층을 형성시키는 제4단계; 및
밀봉된 튜브 본체의 양단을 개방시키는 제5단계;를 포함하고,
상기 제4단계 이전에 끊는 물이 담겨진 중화탱크에 상기 튜브 본체를 12시간 이상 투입하여 튜브 본체의 표면에 잔존하는 염산을 제거한 후 자연 건조하는 단계를 더 포함하며,
상기 제1단계는 튜브 본체를 아연 용융조에 투입하여 이루어지는 선박용 암모니아 냉동기의 열교환 튜브의 제조방법.A first step of forming a galvanized layer on the inner and outer peripheral surfaces of the tube body manufactured in the form of a seamless steel pipe to have a thickness of 12 microns or more;
a second step of sealing both ends of the tube body;
A third step of removing the galvanized layer formed on the outer peripheral surface of the tube body by applying hydrochloric acid to the surface of the sealed tube body;
A fourth step of forming an anti-rust coating layer on the outer peripheral surface of the tube body; and
A fifth step of opening both ends of the sealed tube body;
The method further comprises the step of naturally drying the tube body after removing hydrochloric acid remaining on the surface of the tube body by putting the tube body into a neutralization tank containing boiling water before the fourth step for more than 12 hours,
The first step is a method of manufacturing a heat exchange tube of an ammonia refrigerator for ships, which is made by putting the tube body into a zinc molten bath. 삭제delete 삭제delete 삭제delete 삭제delete
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009160643A (en) * 2008-01-10 2009-07-23 Nittetsu Drum Kk Chemical terminal processing method for galvanized steel sheet, and terminal processing device therefor
US20130306185A1 (en) * 2012-05-18 2013-11-21 Tube-Mac Industries, Ltd. Method of Making Hydralic Tubing
KR101491501B1 (en) * 2014-10-27 2015-02-09 주식회사 블랙스미스 Welding method of steel type nut with galvanizing zincing hydraulic seamless precision steel tube
KR20160095925A (en) 2015-02-04 2016-08-12 대우조선해양 주식회사 Electricity generation system in vessel using sea water
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