KR100422897B1 - Tube sheet joint type heat exchanger - Google Patents

Tube sheet joint type heat exchanger Download PDF

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Publication number
KR100422897B1
KR100422897B1 KR10-2001-0052104A KR20010052104A KR100422897B1 KR 100422897 B1 KR100422897 B1 KR 100422897B1 KR 20010052104 A KR20010052104 A KR 20010052104A KR 100422897 B1 KR100422897 B1 KR 100422897B1
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KR
South Korea
Prior art keywords
heat exchanger
tube
tubes
tube sheet
varnish
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KR10-2001-0052104A
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Korean (ko)
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KR20030018392A (en
Inventor
두석만
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신정우산업(주)
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Priority to KR10-2001-0052104A priority Critical patent/KR100422897B1/en
Publication of KR20030018392A publication Critical patent/KR20030018392A/en
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Publication of KR100422897B1 publication Critical patent/KR100422897B1/en

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    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/103—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of more than two coaxial conduits or modules of more than two coaxial conduits
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2230/00—Sealing means

Abstract

본 발명은 튜브시트 조인트형 열교환기에 관한 것으로서, 열교환기는, 다수개의 튜브(30)의 양 단부에 결합되는 상,하부 튜브시트(21)(22)와, 상,하부 튜브시트(21)(22)와 각각 실링되게 결합되는 상,하부 헤더(41)(42)를 포함하는 열교환기에 있어서, 상부 튜브시트(21)와 하부 튜브시트(22)의 동일 위치에 다수개의 홀(21a)이 형성되어 있고, 그 홀(21a)들에는 튜브(30)들의 일부가 관통되도록 끼어져 있으며, 관통된 튜브(30)들과 상,하부 튜브시트(21)(22) 사이에는 바니쉬(varnish)가 스며들어가 굳어진 것을 특징으로 한다. 또한, 그 열교환기의 튜브를 튜브에 조인하는 방법은, 튜브시트(21)와 하부 튜브시트(22)의 동일 위치에 다수개의 홀(21a)을 형성하는 단계; 홀(21a)들에 튜브(30)들의 일부가 관통되도록 끼어넣는 단계; 관통된 튜브(30)들과 상,하부 튜브시트(21)(22) 사이에 바니쉬(varnish)를 덧칠하여 실링하는 단계; 바니쉬가 굳어지도록 소정의 온도로 가열시키는 단계;를 포함한다.The present invention relates to a tubesheet joint type heat exchanger, wherein the heat exchanger includes upper and lower tubesheets 21 and 22 coupled to both ends of a plurality of tubes 30, and upper and lower tubesheets 21 and 22. In the heat exchanger including the upper and lower headers 41 and 42 coupled to each other to be sealed, a plurality of holes 21a are formed at the same position of the upper tube sheet 21 and the lower tube sheet 22. Part of the tubes 30 are inserted through the holes 21a, and varnish penetrates between the penetrated tubes 30 and the upper and lower tube sheets 21 and 22. It is characterized by hardening. In addition, the method of joining the tube of the heat exchanger to the tube, forming a plurality of holes (21a) in the same position of the tube sheet 21 and the lower tube sheet 22; Inserting a portion of the tubes 30 through the holes 21a to penetrate; Sealing by varnishing the varnish between the penetrated tubes 30 and the upper and lower tube sheets 21 and 22; Heating to a predetermined temperature to harden the varnish.

Description

튜브시트 조인트형 열교환기{Tube sheet joint type heat exchanger}Tube sheet joint type heat exchanger

본 발명은 튜브시트 조인트형 열교환기에 관한 것이다.The present invention relates to a tubesheet joint type heat exchanger.

열교환기는 다양한 산업 분야에서 광범위하게 채용되고 있으며, 예를 들면 각종 냉/난방 장치, 변압기의 방열기등에 채용되고 있다. 열교환기는 사용 목적에 따라 다양한 구조를 가지며, 대표적인 구조로는 튜브시트 조인트형 열교환기가 있다. 이러한 튜브시트 조인트형 열교환기는, 상,하부 튜브시트 사이에 결합되는 다수개의 튜브와, 상,하부 튜브시트에 실링되게 결합되는 상,하부 헤더를 가지는 구조를 이룬다.Heat exchangers are widely used in various industrial fields, for example, various heat / cooling devices, heat radiators of transformers, and the like. The heat exchanger has various structures according to the purpose of use, and a representative structure includes a tube sheet joint type heat exchanger. The tube sheet joint type heat exchanger has a structure having a plurality of tubes coupled between upper and lower tube sheets, and upper and lower headers coupled to be sealed to upper and lower tube sheets.

그런데, 상기와 같은 구조의 열교환기에 있어서, 상,하부 튜브시트에 튜브를 조인하는 과정은 매우 복잡한데, 예를 들면 상,하부 튜브시트에 홀을 형성하고 튜브를 그 홀에 직접 용접하는 방법이나, 또는 튜브를 상,하부 튜브시트의 홀에 끼어 넣은 후 소정의 기구를 이용하여 튜브들을 확관함으로써 홀에 억지 끼어맞추는 방법들이 주로 사용되고 있다. 이러한 방법은 매우 더디게 진행되므로 결국 열교환기의 제조 효율이 떨어지고 이는 열교환기의 단가 상승으로 이어졌다.By the way, in the heat exchanger having the above structure, the process of joining the tube to the upper and lower tube sheets is very complicated. Or, by inserting the tube into the hole of the upper and lower tube sheet, and then by using a predetermined mechanism to expand the tubes by using a method for tightly fitting the hole is mainly used. This method is very slow, and as a result, the manufacturing efficiency of the heat exchanger decreases, which leads to an increase in the cost of the heat exchanger.

또한, 상기한 용접 방법이나 확관 방법에 의하면 상,하부 튜브시트의 홀에 튜브가 완전히 실링되도록 조인하는 것이 어려우므로, 소정이 시간이 지난후 냉각유가 새는 리크 현상이 종종 발생하였고, 이로 인하여 열교환기의 사용 수명이 짧아지게 되었다.In addition, according to the welding method and the expansion method described above, it is difficult to completely join the tube to the hole of the upper and lower tube sheets so that leaking of the cooling oil often occurs after a predetermined time. The service life of is shortened.

본 발명은 상기와 같은 문제점을 해결하기 위하여 창출된 것으로서, 튜브와 튜브시트가 완벽하게 실링되도록 조인된 열교환기를 제공하는 것을 목적으로 한다.The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchanger that is joined so that the tube and the tubesheet are completely sealed.

도 1 은 본 발명에 따라 튜브를 튜브시트에 조인하여 구현한 열교환기의 일 실시예의 사시도,1 is a perspective view of an embodiment of a heat exchanger implemented by joining a tube to a tubesheet according to the present invention;

도 2 는 도 1에 있어서 튜브와 튜브시트와의 조인 상태를 도시한 도면.FIG. 2 is a view showing a state in which a tube and a tube sheet are joined in FIG. 1. FIG.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 ... 본체10 ... main unit

10a, 10b ... 제1유입구 및 제1유출구10a, 10b ... first inlet and first outlet

11, 12 ... 플랜지 21, 22 ... 튜브시트11, 12 ... flange 21, 22 ... tubesheet

21a ... 홀 30 ... 튜브21a ... hole 30 ... tube

41, 42 ... 상,하부 헤더41, 42 ... upper and lower header

41a, 42a ... 제2유입구 및 제2유출구41a, 42a ... second inlet and second outlet

상기와 같은 목적을 달성하기 위하여, 본 발명에 따른 튜브시트 조인트형 열교환기는,다수개의 튜브(30)의 양 단부에 결합되는 상,하부 튜브시트(21)(22)와, 상기 상,하부 튜브시트(21)(22)와 각각 실링되게 결합되는 상,하부 헤더(41)(42)를 포함하는 열교환기에 있어서, 상기 상부 튜브시트(21)와 하부 튜브시트(22)의 동일 위치에 다수개의 홀(21a)이 형성되어 있고, 그 홀(21a)들에는 튜브(30)들의 일부가 관통되도록 끼어져 있으며, 관통된 튜브(30)들과 상,하부 튜브시트(21)(22) 사이에는 바니쉬(varnish)가 스며들어가 가열되어 굳어짐으로써 실링되는 것을 특징으로 한다.In order to achieve the above object, the tube sheet joint type heat exchanger according to the present invention, the upper and lower tube sheets 21 and 22 coupled to both ends of the plurality of tubes 30, and the upper and lower tubes In a heat exchanger comprising upper and lower headers (41, 42) coupled to each of the seats (21) and (22) sealingly, a plurality of at the same position of the upper tube sheet 21 and the lower tube sheet (22) A hole 21a is formed, and a portion of the tubes 30 is inserted through the holes 21a, and between the through tubes 30 and the upper and lower tube sheets 21 and 22. Varnish (varnish) is characterized in that it is sealed by heating and hardening.

이하, 본 발명에 따른 튜브시트 조인트형 열교환기를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, a tubesheet joint type heat exchanger according to the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 본 발명에 따라 튜브를 튜브시트에 조인하여 구현한 열교환기의 일 실시예의 사시도이고, 도 2 는 도 1에 있어서 튜브와 튜브시트와의 조인 상태를 도시한 도면이다.1 is a perspective view of an embodiment of a heat exchanger implemented by joining a tube to a tubesheet according to the present invention, and FIG. 2 is a view illustrating a state of joining a tube and a tubesheet in FIG. 1.

도면을 참조하면, 열교환기의 일 실시예는, 본체(10)의 양 플랜지(11)(12)에 설치되는 상,하부 튜브시트(21)(22)와, 상,하부 튜브시트(21)(22) 사이에 연통되게 설치되는 다수개의 튜브(30)와, 상,하부 튜브시트(21)(22)에 실링되게 각각 결합되는 상,하부 헤더(41)(42)를 포함한다.Referring to the drawings, one embodiment of the heat exchanger, the upper and lower tube sheets 21 and 22 installed on both flanges 11 and 12 of the main body 10 and the upper and lower tube sheets 21. And a plurality of tubes 30 installed in communication between the upper and lower ends, and upper and lower headers 41 and 42 respectively coupled to be sealed to the upper and lower tube sheets 21 and 22.

본체(10)에는 냉각유 또는 가열유가 유입되고 유출되는 제1유입구(10a) 및 제1유출구(10b)가 형성되어 있다. 이곳으로 외부의 냉각수단, 예를 들면 팬과 라디에이터로 구성되거나, 방열판과 같은 냉각수단을 경유하는 냉각유가 흐르게 된다.The main body 10 is provided with a first inlet 10a and a first outlet 10b through which cooling oil or heating oil flows in and out. This is where the cooling oil consisting of an external cooling means, for example, a fan and a radiator, or via a cooling means such as a heat sink flows.

상,하부 튜브시트(21)(22)는 양 플랜지(11)(12)에 실링되게 결합되는 것으로서, 동일 위치에 다수개의 홀이 형성되어 있다. 설명을 용이하게 하기 위하여 상부 튜브시트(21)를 예로써 설명하면, 도 2에 도시된 바와 같이 홀(21a)이 형성되어 있고, 이 홀(21a)에는 튜브(30)가 일부 관통되어 있다.The upper and lower tube sheets 21 and 22 are coupled to both flanges 11 and 12 to be sealed, and a plurality of holes are formed at the same position. In order to facilitate the explanation, the upper tube sheet 21 will be described as an example. As shown in FIG. 2, a hole 21a is formed, and a part of the tube 30 penetrates the hole 21a.

튜브(30)들은 상,하부 튜브시트(21)(22)의 홀(21a)들을 관통하고 있다. 이때, 상,하부 튜브시트(21)(22)와 튜브(30) 사이에는 바니쉬(varnish)가 스며들어가 굳음으로써 실링되어 있다. 이러한 튜브(30)들의 일부가 튜브시트(21)(22)를 관통하는 것이 바람직하다.The tubes 30 penetrate the holes 21a of the upper and lower tube sheets 21 and 22. At this time, the varnish is sealed between the upper and lower tube sheets 21 and 22 and the tube 30 so as to seal. It is preferred that some of these tubes 30 pass through the tubesheets 21 and 22.

상,하부 헤더(41)(42)는 상,하부 튜브시트(21)(22)에 각각 실링되게 설치되는 것으로서, 상부 헤더(41)에는 냉각유 또는 가열유가 인입되고 유출되는 제2유입구(41a) 및 제2유출구(42a)가 형성되어 있다. 상부 헤더(41)로 유입된 냉각유 또는 가열유는 튜브(30)들을 경유한 후 하부 헤더(42)로 모아지고, 이후 외부로 유출된다.The upper and lower headers 41 and 42 are installed to be sealed to the upper and lower tube sheets 21 and 22, respectively. ) And a second outlet 42a are formed. Cooling or heating oil introduced into the upper header 41 is collected into the lower header 42 after passing through the tubes 30, and then flows out.

다음, 상기와 같은 구조의 열교환기에 제조방법에 적용되는 것으로서, 튜브(30)를 튜브시트(21)(22)에 조인하는 방법을 설명한다.Next, a method of joining the tube 30 to the tube sheets 21 and 22 will be described as being applied to the manufacturing method of the heat exchanger having the above structure.

먼저, 상부 튜브시트(21)와 하부 튜브시트(22)의 동일 위치에 다수개의 홀(21a)을 형성하는 단계를 수행한다.First, a step of forming a plurality of holes 21a at the same position of the upper tubesheet 21 and the lower tubesheet 22 is performed.

다음, 홀(21a)들에 튜브(30)들을 끼어넣어 일부가 관통되도록 하는 단계를 수행한다.Next, a step of inserting the tubes 30 into the holes 21a to allow a portion thereof to penetrate is performed.

다음, 관통된 튜브(30)들과 상,하부 튜브시트(21)(22) 사이에 바니쉬(varnish ;50)를 덧칠하는 단계를 수행한다. 이때 사용되는 바니쉬는 액상의 것을 사용하는데, 굳은 이후, 열 및 압력에도 내구성이 강한 것을 사용한다. 바니쉬는 튜브와 튜브시트가 접하는 부분에 덧칠하는데, 이때 바니쉬는 모세관 현상에 의하여 튜브와 튜브시트 사이의 공간을 모두 메워줌으로써 견고하게 실링된다.Next, a step of coating a varnish 50 is performed between the through tubes 30 and the upper and lower tube sheets 21 and 22. At this time, the varnish used is a liquid one, after being hardened, it uses a strong durability against heat and pressure. The varnish is overlaid on the part where the tube and the tube sheet contact each other, where the varnish is firmly sealed by filling all the space between the tube and the tube sheet by capillary action.

다음, 바니쉬가 굳을 수 있도록 토치를 이용하여 소정시간 굳히는 단계를 수행한다.Next, the step of hardening the predetermined time by using the torch to harden the varnish.

본 발명은 도면에 도시된 일 실시예를 참고로 설명되었으나 이는 예시적인 것에 불과하며, 본 기술 분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다.Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

상술한 바와 같이 본 발명에 따르면, 액상의 바니쉬를 튜브와 튜브시트와 접하는 부분에 칠함으로써 바니쉬가 튜브와 튜브시트 사이의 공간으로 스며들면서 굳어지고 이로써 튜브는 튜브시트에 견고하게 실링된다. 따라서, 종래와 같이 용접이나 확관하는 복잡한 공정을 거칠 필요가 없어 결국 열교환기의 제조효율이 상승되고 단가를 낮출 수 있다.As described above, according to the present invention, by applying a liquid varnish to a portion in contact with the tube and the tube sheet, the varnish penetrates into the space between the tube and the tube sheet, thereby hardening, and thereby the tube is firmly sealed to the tube sheet. Therefore, there is no need to go through a complicated process of welding or expanding as in the prior art, so that the production efficiency of the heat exchanger can be increased and the cost can be lowered.

또한, 바니쉬가 튜브와 튜브시트 사이에 스며들면서 굳어지므로 실링이 확실하게 되어 냉각유가 새는 리크 현상을 방지할 수 있다. 따라서, 전열 효율이 낮아지고 열교환기의 수명이 단축되는 것을 막을 수 있다.In addition, the varnish stiffens as it penetrates between the tube and the tube sheet, so that the sealing is secured, thereby preventing leakage of the cooling oil. Therefore, the heat transfer efficiency is lowered and the life of the heat exchanger can be prevented from being shortened.

Claims (2)

다수개의 튜브(30)의 양 단부에 결합되는 상,하부 튜브시트(21)(22)와, 상기 상,하부 튜브시트(21)(22)와 각각 실링되게 결합되는 상,하부 헤더(41)(42)를 포함하는 열교환기에 있어서,Upper and lower tube sheets 21 and 22 coupled to both ends of the plurality of tubes 30, and upper and lower headers 41 to be sealed to the upper and lower tube sheets 21 and 22, respectively. In a heat exchanger comprising (42), 상기 상부 튜브시트(21)와 하부 튜브시트(22)의 동일 위치에 다수개의 홀(21a)이 형성되어 있고, 그 홀(21a)들에는 튜브(30)들의 일부가 관통되도록 끼어져 있으며, 관통된 튜브(30)들과 상,하부 튜브시트(21)(22) 사이에는 바니쉬(varnish)가 스며들어가 가열되어 굳어짐으로써 실링되는 것을 특징으로 하는 튜브시트 조인트형 열교환기.A plurality of holes 21a are formed at the same position of the upper tube sheet 21 and the lower tube sheet 22, and the holes 21a are inserted to penetrate some of the tubes 30. Tube sheet joint type heat exchanger characterized in that the varnish (varnish) is infiltrated between the tubes 30 and the upper, lower tube sheets (21, 22) is sealed by heating and hardening. 삭제delete
KR10-2001-0052104A 2001-08-28 2001-08-28 Tube sheet joint type heat exchanger KR100422897B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024056364A1 (en) * 2022-09-16 2024-03-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Shell-and-tube heat exchanger

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5682392A (en) * 1979-12-07 1981-07-06 Nippon Denso Co Ltd Heat exchanger
US4382468A (en) * 1979-05-17 1983-05-10 Hastwell P J Flat plate heat exchanger modules
JPS58214794A (en) * 1982-06-07 1983-12-14 Matsushita Electric Ind Co Ltd Plastic resin made heat exchanger
JPH11351785A (en) * 1998-06-04 1999-12-24 Denso Corp Heat exchanger and its manufacture
KR20010113727A (en) * 1999-03-10 2001-12-28 티모시 코인 Welded heat exchanger with grommet construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382468A (en) * 1979-05-17 1983-05-10 Hastwell P J Flat plate heat exchanger modules
JPS5682392A (en) * 1979-12-07 1981-07-06 Nippon Denso Co Ltd Heat exchanger
JPS58214794A (en) * 1982-06-07 1983-12-14 Matsushita Electric Ind Co Ltd Plastic resin made heat exchanger
JPH11351785A (en) * 1998-06-04 1999-12-24 Denso Corp Heat exchanger and its manufacture
KR20010113727A (en) * 1999-03-10 2001-12-28 티모시 코인 Welded heat exchanger with grommet construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024056364A1 (en) * 2022-09-16 2024-03-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Shell-and-tube heat exchanger
FR3139892A1 (en) * 2022-09-16 2024-03-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Tube-and-shell heat exchanger

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