KR100796231B1 - Structure of connecting duct - Google Patents

Structure of connecting duct Download PDF

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Publication number
KR100796231B1
KR100796231B1 KR1020060084945A KR20060084945A KR100796231B1 KR 100796231 B1 KR100796231 B1 KR 100796231B1 KR 1020060084945 A KR1020060084945 A KR 1020060084945A KR 20060084945 A KR20060084945 A KR 20060084945A KR 100796231 B1 KR100796231 B1 KR 100796231B1
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South Korea
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duct
square
packing
square duct
coupled
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KR1020060084945A
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Korean (ko)
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원재희
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주식회사 프럼파스트
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/0209—Ducting arrangements characterised by their connecting means, e.g. flanges

Abstract

A structure of a connecting duct is provided to form connecting parts at both ends of a square duct to reduce the number of processes, install packings at the inside of the connecting parts to prevent separation of the connecting parts from the square duct and a leakage of air. A connecting duct(40) is made of injected synthetic resin. A support part(12) of the connecting duct has both ends having a section formed in a square shape with right side open to support an inner peripheral surface of a square duct. A cover part(11) covers an outer peripheral surface of the square duct. A connecting part(10) has an engaging groove(13) between the cover part and the support part for connecting the square duct. The support part is longer than the cover part to prevent drooping and bending when the square duct is combined. A packing(20) is installed at the securing groove of the connecting part. The packing has a section formed in a square shape with right side open. The outside of the packing combined with the cover part is longer than the inside combined with the support part. A plurality of protrusions are formed at the outside at regular intervals, wherein the protrusion has a section formed in a right-angled triangle.

Description

연결덕트의 구조{Structure of connecting duct}Structure of connecting duct

도 1은 제 1실시예에 따른 연결턱트의 단면도.1 is a cross-sectional view of the connecting jaw according to the first embodiment.

도 2는 제 1실시예에 따른 연결덕트의 사시도.2 is a perspective view of a connection duct according to the first embodiment;

도 3은 제 1실시예에 따른 패킹의 단면도.3 is a sectional view of a packing according to the first embodiment;

도 4는 제 1실시예에 따른 패킹의 측면도.4 is a side view of the packing according to the first embodiment;

도 5는 제 1실시예에 따른 몸체의 측면도.5 is a side view of the body according to the first embodiment;

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

10: 연결구 11: 덮개부10: connector 11: cover

12: 지탱부 13: 안착홈12: Supporting portion 13: Seating groove

20: 패킹 21: 돌기20: Packing 21: Turning

30: 사각덕트 40: 연결덕트30: square duct 40: connection duct

본 발명은 양단에 연결구가 형성된 연결덕트 구조에 관한 것으로, 더욱 상세하게는 상기 사각덕트의 양단에 연결구가 형성되어 플랜지의 사용을 삭제하여 공정의 수를 줄이며, 상기 사각덕트의 자중에 의해서 강도가 약한 사각덕트 상의 휨이 나 처짐 등에 의해 분리되거나 공기의 누출현상을 방지하기 위한 상기 연결구의 내측으로 패킹이 형성되고, 지탱해 주는 부분을 길게 형성한 것을 특징으로 하는 연결덕트 구조에 관한 것이다.The present invention relates to a connection duct structure formed at both ends of the connector, and more particularly, the connector is formed at both ends of the square duct to eliminate the use of the flange to reduce the number of processes, the strength by the weight of the square duct The present invention relates to a connection duct structure characterized in that a packing is formed inside the connector for preventing the leakage of air or the air is separated by bending or deflection on a weak rectangular duct, and a supporting portion is formed long.

일반적으로, 주택 내의 쾌적한 환경을 위하여 베란다 쪽의 천정에 열교환장치 및 외기청정필터를 부착한 기기를 설치하여 여름에는 여과된 찬 공기를 겨울에는 따뜻한 공기를 공급하기 위한 각각의 방에 덕트가 연결된다.In general, a duct is connected to each room for supplying cold air in summer and warm air in winter by installing a device equipped with a heat exchanger and an outside air filter on the ceiling of the veranda for a comfortable environment in the house. .

이러한 상기 덕트는 다수개의 단위덕트가 볼트와 너트로서 서로 연결되어 공기가 유동되는 하나의 덕트로서 형성된다.The duct is formed as a single duct through which a plurality of unit ducts are connected to each other as bolts and nuts, through which air flows.

또한, 상기와 같이 설치되는 덕트는 통상적으로 일정한 두께를 갖는 하나의 사출된 수지로 이루어진다.In addition, the duct installed as described above is usually made of one injected resin having a constant thickness.

그러나, 이와 같이 이루어진 상기 덕트의 양단부에는 판재의 덕트용 수지를 수직하게 절곡시킨 플랜지가 형성되는바, 상기 플랜지 상에는 구멍이 천공되고, 이 구멍을 통해 볼울트가 삽입되어 너트로서 체결됨으로써 양측의 상기 덕트를 상호 결합, 고정하게 되는데, 이때 상기한 플랜지는 일정한 두께를 갖는 하나의 판넬로서 이루어져 양 덕트의 결합 후에 덕트의 자중에 의해서 강도가 약한 상기 플랜지 상에 휨이나 처짐 등의 변형 및 파손이 발생되고, 그로 인해 상기 덕트 내를 유동하는 공기의 흐름이 원활치 못하게 됨과 동시에 공기의 누출이 발생되어 열손실이 생기게 됨으로써 효율적인 공기조화를 이룰 수 없게 되며, 상기 덕트 설치 현장에서 덕트용 관체를 접속하는 작업은, 대향되는 상기 양 플랜지를 접합해서 플랜지의 상기 보울트 삽통용 구멍을 일치시키는데에 상당한 노력을 필요로 하며, 상기 보울트 삽통용 구멍을 8개 이상 이어서 보울트 체결 작업에 있어서 번잡한 문제점이 있다. However, at both ends of the duct made in this way, a flange is formed to vertically bend the resin for the duct of the plate, and a hole is drilled on the flange, through which the bolt is inserted and fastened as a nut, so that both sides of the In this case, the flange is composed of one panel having a constant thickness, and deformation and breakage, such as bending or deflection, occur on the flange, which is weak in strength due to the weight of the duct after joining both ducts. As a result, the flow of air flowing through the duct is not smooth and at the same time the leakage of air is generated to cause heat loss can not achieve efficient air conditioning, the work of connecting the duct pipe at the duct installation site Silver joins the opposite flanges so that the bolt insertion of the flange Requires a great deal of effort to match the hole, the bolt insertion hole is then accepted more than 8 there is a troublesome problem in the bolt fastening operation.

또 다른 방법으로 상기 플랜지의 사용을 삭제한 덕트 간의 끼움에 의한 결합 후 결합부의 공기 누출을 방지하기 위해 테이핑 고정되는데, 상기 테이핑에 의한 고정으로 장기간 방치될 경우 고정 및 공기누출 방지의 역할을 하는 테이핑의 접착력이 약화되어 상기 사각덕트의 처짐 휨 등에 의한 공간이 발생하여 공기가 유출되거나 분리되는 문제점을 갖는다. In another method, the tape is fixed to prevent air leakage of the joint after fitting by fitting between the ducts, which eliminates the use of the flange, which serves to fix and prevent air leakage when left for a long time due to the fixing by taping. The adhesive force of the weakened to generate a space due to deflection bending of the square duct, there is a problem that air is leaked or separated.

본 발명은 상기의 문제점을 해결하기 위해 안출된 것으로서, 사각덕트의 양단에 연결구가 형성된 연결덕트 구조에 관한 것으로, 더욱 상세하게는 상기 사각덕트의 양단에 연결구를 설치하여 플랜지의 사용으로 인한 공정수를 줄이며, 상기 사각덕트의 자중에 의해서 강도가 약한 사각덕트 상의 휨이나 처짐 등에 의해 분리되거나 공기의 누출현상을 방지하기 위한 상기 연결구의 내측으로 패킹이 형성되고, 지탱해 주는 부분을 길게 형성한 연결덕트 구조를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, and relates to a connection duct structure formed with a connector at both ends of the square duct, more specifically, by installing the connector at both ends of the square duct, the number of processes due to the use of the flange The connection is formed by reducing the weight of the square duct by the bending or deflection on the weak square duct by the weight of the square duct or by forming a packing inside the connector for preventing air leakage. The purpose is to provide a duct structure.

상기의 문제를 해결하기 위한 본 발명은 사각덕트를 연결시키는 연결덕트에 있어서, 상기 연결덕트(40)는 사출된 합성수지로 형성되고, 양단부는 단면이 'ㄷ'자 형태로 형성되어 연설하는 사각덕트(30)의 내주면을 지지할 수 있도록 지탱부(12)와, 상기 사각덕트(30)의 외주면을 감쌀 수 있도록 덮개부(11)로 형성되고, 상기 덮개부(11)와 지탱부(12)의 사이에 사각덕트(30)를 연설하는 안착홈(13)이 형성되는 연결구(10)가 형성되되, 상기 지탱부(12)는 사각덕트(30) 결합시 처짐과 휨 현상을 방지하기 위하기 위하여 덮개부(11) 보다 길게 형성되며,
상기 연결구(10)의 안착홈(13)에 패킹(20)이 설치되되, 상기 패킹(20)은 단면이 'ㄷ'자 형태로 형성되고, 상기 지탱부(12)에 결합되는 내측보다 덮개부(11)에 결합되는 외측이 길게 형성되며, 상기 덮개부(11)에 결합되는 외측에는 견고한 고정을 위한 돌기(21)가 일정간격 이격되어 다수개 형성되며, 상기 돌기(21)는 단면상 직각삼각형으로 형성된다.In the present invention for solving the above problems, in the connection duct connecting the square duct, the connection duct 40 is formed of an injection-molded synthetic resin, both ends are formed in the form of the letter 'c' square duct speech The support part 12 and the cover part 11 are formed to cover the outer circumferential surface of the square duct 30 so as to support the inner circumferential surface of the 30, and the cover part 11 and the support part 12. A connector 10 is formed in which a seating groove 13 is formed to speak a square duct 30 therebetween, and the support part 12 is to prevent sagging and bending when the square duct 30 is coupled. In order to form longer than the cover portion 11,
Packing 20 is installed in the seating groove 13 of the connector 10, the packing 20 is formed in the shape of the letter 'c', the cover portion than the inner side coupled to the support portion 12 The outer side coupled to the (11) is formed long, the outer side coupled to the cover 11 is formed with a plurality of projections 21 for a fixed fixed spaced apart at regular intervals, the projection 21 is a right triangle in cross section Is formed.

삭제delete

이하, 본 발명에 따른 연결덕트의 구조를 첨부된 도면을 참조하여 상세하게 설명한다. Hereinafter, the structure of the connection duct according to the present invention will be described in detail with reference to the accompanying drawings.

도 1은 제 1실시예에 따른 연결턱트의 단면도이고, 도 2는 제 1실시예에 따른 연결덕트의 사시도이며, 도 3은 제 1실시예에 따른 패킹의 단면도이고, 도 4는 제 1실시예에 따른 패킹의 측면도이며, 도 5는 제 1실시예에 따른 연결구의 측면도이다.1 is a cross-sectional view of a connecting duct according to a first embodiment, FIG. 2 is a perspective view of a connecting duct according to a first embodiment, FIG. 3 is a sectional view of a packing according to a first embodiment, and FIG. 4 is a first embodiment. 5 is a side view of the packing according to the example, and FIG. 5 is a side view of the connector according to the first embodiment.

도 1을 참조하면 사각덕트(30)가 결합된 연결덕트(40)의 단면도로서, 상기 연결덕트(40)는 사출된 수지로 제작된 직사각형 형태이며, 상기 연결덕트(40)의 내부는 공기가 유동될 수 있도록 관통되고, 양끝단에 형성된 연결구(10)의 내측에 상기 사각덕트(30)가 결합되는 단면상 일측에 "ㄷ" 형태의 안착홈(13)이 형성되며, 타측에도 상호대칭되는 안착홈(13)이 형성되고, "ㄷ" 형태의 개방된 부분이 상기 사각덕트(30)가 결합되는 방향을 향하도록 형성되며, 상기 안착홈(13)의 "ㄷ" 형태의 외측으로 돌출된 면은 상기 사각덕트(30)와 결합시 사각덕트(30)의 외주면을 감쌀 수 있도록 덮개부(11)가 형성되고, 상기 "ㄷ" 형태의 안착홈(13)의 내측면에는 사각덕트(30)와 결합시 처짐 및 휨 등을 방지하기 위해 상기 덮개부(11)와 대향되는 지탱부(12)가 상기 덮개부(11)에 비해 길게 형성된다. Referring to Figure 1 is a cross-sectional view of the connection duct 40 is coupled to the square duct 30, the connection duct 40 is a rectangular shape made of an injection resin, the interior of the connection duct 40 is air Penetrating so as to flow, the inner side of the connector 10 formed at both ends of the square duct 30 is coupled to the cross-section on one side of the "c" shaped seating groove 13 is formed, the other side is mutually seated The groove 13 is formed, the open portion of the "c" shape is formed to face the direction in which the square duct 30 is coupled, the surface protruding out of the "c" shape of the seating groove 13 The cover portion 11 is formed so as to surround the outer circumferential surface of the square duct 30 when combined with the square duct 30, the square duct 30 on the inner surface of the seating groove 13 of the "c" shape In order to prevent sagging and bending when combined with the support portion 12 facing the cover portion 11 is longer than the cover portion 11 Crab is formed.

그리고, 상기 연결덕트(40)는 사각덕트(30) 결합시 상기 안착홈(13)이 외력에 의해 넓혀져 결합하며, 결합 후 안착홈(13)이 원상회복되는 탄성력이 있는 사출된 합성수지로 형성되며, 또한, 상기 연결구(10)의 내측에 형성된 패킹(20)은 상기 사각덕트(30) 결합시 자중에 의해 분리되지 않으면서도 공기의 유출을 방지할 수 있도록 마찰력이 강한 고무나 합성수지 등으로 제작하며, 상기 안착홈(13)과 동일한 일측이"ㄷ"이고, 타측도 상호대칭되는 "ㄷ" 형태이지만, 상기 덮개부(11)에 결합되는 면이 지탱부(12)에 결합되는 면보다 길게 형성된다.In addition, the connection duct 40 is coupled to the seating groove 13 is widened by an external force when the square duct 30 is coupled, and is formed of an injection-molded synthetic resin that the seating groove 13 is restored to its original shape after the coupling In addition, the packing 20 formed inside the connector 10 is made of rubber or synthetic resin with strong friction to prevent the outflow of air without being separated by its own weight when the square duct 30 is combined And, the same side as the seating groove 13 is "c", the other side is "c" shape that is mutually symmetrical, but the surface coupled to the cover portion 11 is formed longer than the surface coupled to the support portion 12 do.

도 2를 참조하면 연결덕트(40)의 사시도로서, 상기 연결덕트(40)의 내부는 공기가 유동하도록 관통되며 양끝단에 상기 사각덕트(30)와 결합되는 열결구(10)가 형성되고, 상기 연결구(10)에 형성된 직사각형의 덮개부(11)가 외측으로 돌출되어 형성되며, 상기 연결구(10)의 내측에 형성된 지탱부(12)는 상기 덮개부(11)에 비해 길이방향으로 더욱 길게 돌출된다.Referring to Figure 2 as a perspective view of the connection duct 40, the interior of the connection duct 40 is passed through the air flow is formed in the heat connector 10 is coupled to the square duct 30 at both ends, A rectangular cover part 11 formed on the connector 10 protrudes outward, and the support part 12 formed inside the connector 10 is longer in the longitudinal direction than the cover part 11. It protrudes.

도 3을 참조하면 패킹(20)의 단면도로서, 상기 안착홈(13)에 결합되는 패킹(20)은 상기 연결덕트(40)의 일측에 형성된 패킹(20)이 "ㄷ" 형태이며, 타측도 상호 대칭되는 "ㄷ" 형태이고, 상기 덮개부(11)에 결합되는 면이 지탱부(12)에 결 합되는 면에 비해 길게 형성되며, 상기 덮개부(11)에 결합되는 면에 직각삼각형의 돌기(21)가 일정간격으로 이격되어 다수개 형성되어 상기 돌기(21)의 수직인 면이 사각덕트(30)가 결합되는 방향을 향하도록 상기 덮개부(11)에 결합된다.Referring to Figure 3 is a cross-sectional view of the packing 20, the packing 20 is coupled to the seating groove 13 is a packing 20 formed on one side of the connection duct 40 is the "c" form, the other side Cross-symmetric "c" shape, the surface coupled to the cover portion 11 is formed longer than the surface coupled to the support portion 12, the right side of the triangle coupled to the surface coupled to the cover portion 11 A plurality of protrusions 21 are formed at regular intervals and are coupled to the cover part 11 so that the vertical surfaces of the protrusions 21 face the direction in which the square duct 30 is coupled.

도 4를 참조하면 패킹(20)의 측면도로서, 직사각형의 형태로 상기 연결구(10)의 안착홈(13)에 결합되며, 상기 사각덕트(30)와 결합시에 보다 견고한 고정을 위해 도면상 모든 모서리 부분이 라운딩 처리되고, 상기 패킹(20)의 외각이 상기 덮개부(11)에 결합되는 면으로 직각삼각형의 돌기(21)가 일정간격으로 이격되어 다수개 형성되어 덮개부(11)에 결합된다.Referring to Figure 4 is a side view of the packing 20, is coupled to the seating groove 13 of the connector 10 in the form of a rectangular, all when combined with the square duct 30 for a more secure fixing The corner portion is rounded, and the outer surface of the packing 20 is coupled to the cover portion 11, and a plurality of right-angled triangular protrusions 21 are formed at regular intervals and are coupled to the cover portion 11. do.

또한, 돌기(21)는 수직인 면이 외측으로 향하도록 결합되어 상기 사각덕트(30)와 결합시 자중에 의한 처짐 및 휨 등이 생기는 상기 사각덕트(40)를 보다 견고하게 고정하기 위해 형성된다. In addition, the protrusion 21 is formed to more firmly fix the square duct 40, which is coupled to the vertical surface facing outward, the deflection and bending due to its own weight when combined with the square duct 30. .

도 5를 참조하면 연결덕트(40)의 양끝단에 형성된 연결구(10)의 측면도로서, 얇은 두께의 직사각형 형태로 공기가 유동할 수 있도록 중앙이 관통되고, 모든 모서리부분이 라운딩되어 다수개가 적측된 형태이며, 최외각에 직사각형 형태의 덮개부(11)가 형성되며, 상기 덮개부(11)의 내측면으로 상기 패킹(20)의 돌기(21)가 형성된 부분이 결합되며, 상기 연결덕트(40)의 중앙의 관통된 부분의 외주면에 측면상 모서리가 라운딩된 직사각형 형태의 지탱부(12)가 형성되어 상기 패킹(20)의 돌기(21)가 없는 부분이 결합된다. Referring to Figure 5 as a side view of the connector 10 formed on both ends of the connection duct 40, the center is passed through the air to flow in a rectangular shape of a thin thickness, all the corners are rounded so that a plurality of And a rectangular cover part 11 is formed at the outermost part, and a portion in which the protrusion 21 of the packing 20 is formed is coupled to an inner side surface of the cover part 11, and the connection duct 40 is formed. On the outer circumferential surface of the penetrated portion of the center of the center) is formed a rectangular support 12 having a rounded corner on the side portion is coupled to the portion without the protrusion 21 of the packing 20.

상기에 기술된 바와 같이 본 발명은 양단에 결합부가 형성된 연결덕트 구조 에 관한 것으로, 더욱 상세하게는 덕트의 양단에 연결구가 형성되어 플랜지의 사용을 삭제하여 공정의 수를 줄이며, 덕트의 자중에 의해서 강도가 약한 연결구의 내측으로 패킹이 형성되고, 지탱해 주는 부분을 길게 형성한 휨이나 처짐 등에 의해 분리 되거나 공기의 누출현상을 방지하는 효과를 갖는다.As described above, the present invention relates to a connection duct structure having coupling portions at both ends. More particularly, the connection duct is formed at both ends of the duct to eliminate the use of flanges, thereby reducing the number of processes, and by the weight of the duct The packing is formed in the inner side of the connector with weak strength, and it is separated by the bending or deflection that formed the supporting portion for a long time or has the effect of preventing the air leakage.

Claims (3)

사각덕트를 연결시키는 연결덕트에 있어서,In the connecting duct connecting the square duct, 상기 연결덕트(40)는 사출된 합성수지로 형성되고, 양단부는 단면이 'ㄷ'자 형태로 형성되어 연설하는 사각덕트(30)의 내주면을 지지할 수 있도록 지탱부(12)와, 상기 사각덕트(30)의 외주면을 감쌀 수 있도록 덮개부(11)로 형성되고, 상기 덮개부(11)와 지탱부(12)의 사이에 사각덕트(30)를 연설하는 안착홈(13)이 형성되는 연결구(10)가 형성되되, 상기 지탱부(12)는 사각덕트(30) 결합시 처짐과 휨 현상을 방지하기 위하기 위하여 덮개부(11) 보다 길게 형성되며, The connecting duct 40 is formed of an injection-molded synthetic resin, and both ends are formed in a 'c' shape so that the support part 12 and the square duct are formed so as to support the inner circumferential surface of the rectangular duct 30 which is speeched. The connector is formed of a cover portion 11 so as to surround the outer circumferential surface of the 30, and a seating groove 13 for forming a square duct 30 between the cover portion 11 and the support portion 12 is formed. 10 is formed, the support portion 12 is formed longer than the cover portion 11 in order to prevent the sag and bending phenomenon when the square duct 30 is coupled, 상기 연결구(10)의 안착홈(13)에 패킹(20)이 설치되되, 상기 패킹(20)은 단면이 'ㄷ'자 형태로 형성되고, 상기 지탱부(12)에 결합되는 내측보다 덮개부(11)에 결합되는 외측이 길게 형성되며, 상기 덮개부(11)에 결합되는 외측에는 견고한 고정을 위한 돌기(21)가 일정간격 이격되어 다수개 형성되며, 상기 돌기(21)는 단면상 직각삼각형으로 형성됨을 특징으로 하는 연결덕트의 구조. Packing 20 is installed in the seating groove 13 of the connector 10, the packing 20 is formed in the shape of the letter 'c', the cover portion than the inner side coupled to the support portion 12 The outer side coupled to the (11) is formed long, the outer side coupled to the cover 11 is formed with a plurality of projections 21 for a fixed fixed spaced apart at regular intervals, the projection 21 is a right triangle in cross section The structure of the connection duct, characterized in that formed by. 삭제delete 삭제delete
KR1020060084945A 2006-09-05 2006-09-05 Structure of connecting duct KR100796231B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100993207B1 (en) * 2008-05-23 2010-11-10 (주)화용씨티에스 Flat duct connector packing assembly
KR101046735B1 (en) 2009-06-10 2011-07-06 주식회사 성진제이티 Ventilation duct connector made of synthetic resin
KR20190123548A (en) * 2018-04-24 2019-11-01 김진성 Fixed Pipe Connector Device
JP7398340B2 (en) 2020-06-08 2023-12-14 日本車輌製造株式会社 Air conditioning duct installation structure for railway vehicles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002039452A (en) * 2000-05-19 2002-02-06 Nippon Denshi Gijutsu Kk Joint for piping, pressure proof test unit, pipe connecting structure and pipe connecting method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002039452A (en) * 2000-05-19 2002-02-06 Nippon Denshi Gijutsu Kk Joint for piping, pressure proof test unit, pipe connecting structure and pipe connecting method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100993207B1 (en) * 2008-05-23 2010-11-10 (주)화용씨티에스 Flat duct connector packing assembly
KR101046735B1 (en) 2009-06-10 2011-07-06 주식회사 성진제이티 Ventilation duct connector made of synthetic resin
KR20190123548A (en) * 2018-04-24 2019-11-01 김진성 Fixed Pipe Connector Device
KR102097661B1 (en) 2018-04-24 2020-04-06 김진성 Fixed Pipe Connector Device
JP7398340B2 (en) 2020-06-08 2023-12-14 日本車輌製造株式会社 Air conditioning duct installation structure for railway vehicles

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