KR20080010487A - Packing cylinder for expansion contraction joint apparatus - Google Patents

Packing cylinder for expansion contraction joint apparatus Download PDF

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Publication number
KR20080010487A
KR20080010487A KR1020060070495A KR20060070495A KR20080010487A KR 20080010487 A KR20080010487 A KR 20080010487A KR 1020060070495 A KR1020060070495 A KR 1020060070495A KR 20060070495 A KR20060070495 A KR 20060070495A KR 20080010487 A KR20080010487 A KR 20080010487A
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South Korea
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packing
packing material
cylinder
pipe
space
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KR1020060070495A
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Korean (ko)
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KR100834849B1 (en
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안창엽
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유창밸브 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/12—Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)

Abstract

A packing cylinder for an expansion and contraction joint apparatus is provided to transmit drinking water effectively by installing packing materials harmless to human body. A packing cylinder for an expansion and contraction joint apparatus comprises a drain pipe(100), a stuffing box, a slip pipe(130), a first packing material(122), and a packing material. The stuffing box has a packing cylinder(111) vertically installed at the outside and a predetermined packing space(113) formed at the lower part, and jets the packing material as a plunger(112) inside. The slip pipe is slipped at the packing space of the stuffing box with a smaller diameter than the drain pipe. The first packing material such as EPDM(ethylene propylene diene mixture) harmless to human body is positioned between the packing space and the slip pipe to block a gap between the slip pipe and the drain pipe inside the packing space. The packing material includes the first packing material, and a second packing material supplied as the plunger of the packing cylinder to allow the first packing material not to have the gap. The second packing material is filled inside the packing cylinder on the first packing material in the packing space. Further, the second packing material is teflon powder.

Description

신축 이음조인트장치의 패킹실린더{Packing cylinder for expansion contraction joint apparatus}Packing cylinder for expansion contraction joint apparatus

도 1은 종래 신축 이음조인트 장치의 패킹실린더 단면도이고,1 is a cross-sectional view of a packing cylinder of a conventional expansion joint device,

도 2는 본 발명 신축 이음조인트장치의 패킹실린더가 적용된 일예의 측면도이고, Figure 2 is a side view of an example in which the packing cylinder of the present invention the expansion joint joint device,

도 3은 도 2의 요부 발췌 확대 단면도이다.3 is an enlarged cross-sectional view of the main portion excerpt of FIG.

※ 도면의 주요 부분에 대한 부호의 설명※ Explanation of codes for main parts of drawing

100:배관, 110:스터핑박스, 111:패킹실린더, 112:플런저, 113:패킹공간, 100: piping, 110: stuffing box, 111: packing cylinder, 112: plunger, 113: packing space,

120:패킹물질,122:제1패킹물질, 124:제2패킹물질,130:슬립관,140:안전밸브.120: packing material, 122: first packing material, 124: second packing material, 130: slip tube, 140: safety valve.

본 발명은 배관의 신축 이음조인트장치가 음용수의 이송시에도 적용가능하도록 음용수와 접촉하는 패킹물질은 인체 무해한 것으로 하고, 그 위에 실링 기능의 다른 패킹물질을 적용하여 적어도 2종류 이상의 패킹물질이 충진된 신축 이음장치의 패킹실린더에 관한 것이다.According to the present invention, the packing material in contact with the drinking water is harmless to the human body so that the expansion joint joint device of the pipe can be applied even when the drinking water is transported. A packing cylinder for expansion joints.

일반적으로 신축 이음조인트장치의 패킹실린더(111)는 첨부 도면중 도 1에서 도시하는 바와 같이 배관(100)과 슬립관(130)사이의 틈새를 밀봉하기 위하여 배관측에 스터핑박스(110)를 형성하고, 이 스터핑박스에 수직 설치되어 패킹물질(120)이 충진/조절되도록 플런저를 구비하며, 스터핑핑박스(110) 저부의 패킹공간에 연통된다. In general, the packing cylinder 111 of the expansion joint joint device, as shown in Figure 1 of the accompanying drawings to form a stuffing box 110 on the pipe side to seal the gap between the pipe 100 and the slip pipe 130 In addition, the stuffing box is vertically installed to include a plunger for filling / adjusting the packing material 120 and is in communication with the packing space of the bottom of the stuffing box 110.

이와 같은 스터핑박스 저면은 슬립관과 당접하여 있으므로 슬립관의 신축 작동시 배관내부를 흐르는 유체가 누출된다. 이러한 유체 누출을 차단하기 위하여 패킹공간으로 연통하는 플런저측에서 소정의 패킹물질이 주입된다. Since the bottom of the stuffing box is in contact with the slip tube, the fluid flowing inside the pipe leaks during the stretching operation of the slip tube. In order to block such fluid leakage, a predetermined packing material is injected at the plunger side communicating with the packing space.

그러나 그동안 배관내부를 흐르는 유체가 일반적인 유체일 경우에는 문제가 없었으나, 상수원으로 부터 각 가정에 공급되는 음용수일 경우 인체에 유해한 패킹물질이 포함되는 문제점이 있었다. 더욱이 인체에 유해한 테프론파우더 만큼 패킹공간을 차단할 수 있는 유동성있는 물질이 없다.However, there has been no problem when the fluid flowing inside the pipe is a general fluid, but there is a problem that the packing material harmful to the human body is included in the case of drinking water supplied to each household from a water source. Moreover, there is no fluid material that can block the packing space as much as Teflon powder, which is harmful to the human body.

따라서 이러한 누설유체를 차단함에 유용한 패킹물질을 이용하되 배관내 흐르는 음용수의 오염을 방지할 수 있는 패킹물질을 충진한 신축 이음장치의 패킹실린더가 요구되는 것이다.Therefore, the packing cylinder of the expansion joint device filled with a packing material that can prevent the contamination of the drinking water flowing in the pipe using a packing material useful to block the leakage fluid is required.

본 발명은 패킹물질을 이원화하여 음용수와 접촉하는 패킹물질은 인체 무해한 것으로 하고, 그 위에서 실질적으로 실링효과를 얻는 패킹물질은 그동안 사용된 유해성있는 물질이 적용 가능하도록 한 신축 이음장치의 패킹실린더를 제공하는 데에 궁극적인 목적이 있다. The present invention provides a packing cylinder of an expansion joint device in which the packing material which contacts the drinking water by dualizing the packing material is harmless to the human body, and the packing material which has a substantially sealing effect thereon is applicable to harmful substances used in the meantime. The ultimate goal is to.

본 발명은 패킹물질을 다층화하여 음용수와 접촉하는 패킹물질은 인체 무해 한 것으로 하고, 그 위에서 실질적으로 실링효과를 얻는 패킹물질들의 사용이 가능한 신축 이음장치의 패킹실린더를 제공하는 데에도 그 목적이 있다. The present invention is intended to provide a packing cylinder of an expansion joint device in which a packing material which contacts the drinking water by multilayering the packing material is harmless to the human body, and which can be used for the packing materials that substantially obtain a sealing effect thereon. .

상기한 목적을 달성하기 위한 본 발명 신축 이음조인트장치의 패킹실린더는,Packing cylinder of the present invention expansion joint joint device for achieving the above object,

플런저로서 패킹물질의 주입이 이루어지는 패킹실린더가 일체로 수직 설치되고, 저부는 소정의 패킹공간을 형성하여 배관의 일단부에 일체로 연결되는 스터핑박스와; 상기 스터핑박스의 저부에서 신축 이동하는 슬립관과; 상기 패킹공간내에 상기 슬립관과 배관사이의 틈새를 차단하기 위하여 상기 패킹공간과 슬립관 사이에 위치하는 제 1패킹물질; 및 상기 패킹공간내 상기 제1패킹물질위에서 상기 패킹실린더내부에 충진되어 상기 제1패킹물질이 틈새를 형성하지 않도록 패킹실린더의 플런저로서 가압/공급되는 제2패킹물질를 포함하는 신축 이음조인트장치의 패킹실린더로서 달성된다.A stuffing box in which a packing cylinder into which a packing material is injected is vertically installed as a plunger, and a bottom part forms a predetermined packing space and is integrally connected to one end of the pipe; A slip tube which is stretched at the bottom of the stuffing box; A first packing material positioned between the packing space and the slip tube to close a gap between the slip tube and the pipe in the packing space; And a second packing material filled in the packing cylinder on the first packing material in the packing space and pressurized / supplied as a plunger of the packing cylinder so that the first packing material does not form a gap. Is achieved as a cylinder.

상기한 목적을 달성하기 위한 본 발명 신축 이음조인트장치의 패킹실린더의 상기 제 1패킹물질은 인체에 무해한 EPDM(Ethylene Propylene Diene Mixture,이중합성고무)이 바람직하다.In order to achieve the above object, the first packing material of the packing cylinder of the expansion joint joint device of the present invention is preferably EPDM (Ethylene Propylene Diene Mixture), which is harmless to human body.

상기한 목적을 달성하기 위한 본 발명 신축 이음조인트장치의 패킹실린더의상기 제 1패킹물질은 인체에 무해한 실리콘이 바람직하다.In order to achieve the above object, the first packing material of the packing cylinder of the stretch joint joint device of the present invention is preferably silicon, which is harmless to a human body.

상기한 목적을 달성하기 위한 본 발명 신축 이음조인트장치의 패킹실린더의 상기 제1패킹물질위에 적층되어 가압되는 제2패킹물질은 테프론파우더가 바람직하다.Teflon powder is preferably a second packing material that is stacked and pressed on the first packing material of the packing cylinder of the present invention for expansion joint fitting apparatus to achieve the above object.

이하 본 발명의 바람직한 실시예를 첨부 도면들에 의거 구체적으로 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부 도면중 도 2는 본 발명 신축 이음조인트장치의 패킹실린더의 측면도이고, 도 3은 도 2의 요부 발췌 확대 단면도이다.FIG. 2 is a side view of the packing cylinder of the expansion joint joint device of the present invention, and FIG. 3 is an enlarged cross-sectional view of the main portion of FIG.

상기 도면에 따르는 본 발명 신축 이음조인트장치의 패킹실린더는 크게 배관(100)과, 스터핑박스(110)와, 슬립관(130)과, 패킹물질(120)로 이루어진다. The packing cylinder of the expansion joint joint device of the present invention according to the drawings consists of a pipe 100, a stuffing box 110, a slip pipe 130, and a packing material 120.

배관(100)은 일반적으로 유체가 흐르는 내,외측 배관을 통칭한다.The pipe 100 generally refers to internal and external pipes through which fluid flows.

스터핑박스(110)는 상기 배관(100)의 일단부에 용접 고정되며, 그 외측으로 패킹실린더(111)를 수직 설치하고, 그 내부에 플런저(112)로서 패킹물질(120)의 주입이 이루어지도록 하며, 저부는 소정의 패킹공간(113)을 형성하여서 된다.The stuffing box 110 is welded and fixed to one end of the pipe 100, and vertically installs the packing cylinder 111 to the outside thereof, so that the injection of the packing material 120 as the plunger 112 is performed therein. The bottom portion may form a predetermined packing space 113.

슬립관(130)은 상기한 배관(100)과 배관(100)사이의 조인트부를 이루는 스터핑박스(110)의 패킹공간(113)에서 배관(100)보다 작은 직경으로 슬립가능하게 관착된다. The slip pipe 130 is slipperably welded to a smaller diameter than the pipe 100 in the packing space 113 of the stuffing box 110 forming a joint between the pipe 100 and the pipe 100.

패킹물질(120)은 상기 패킹공간(112)내에 상기 슬립관(130)과 배관(100)사이의 틈새를 차단하기 위하여 상기 패킹공간(113)과 슬립관(130) 사이에 위치하는 제 1패킹물질(122)과, 상기 패킹공간(112)내 상기 제1패킹물질(122)위에서 상기 패킹실린더(111)내부에 충진되어 상기 제1패킹물질(122)이 틈새를 형성하지 않도록 패킹실린더(111)의 플런저(112)로서 가압/공급되는 제2패킹물질(124)로 이루어진다.The packing material 120 is a first packing located between the packing space 113 and the slip pipe 130 to block the gap between the slip pipe 130 and the pipe 100 in the packing space 112. The material 122 and the packing cylinder 111 are filled in the packing cylinder 111 on the first packing material 122 in the packing space 112 so that the first packing material 122 does not form a gap. ) Is made of a second packing material 124 that is pressurized / supplied as a plunger 112.

이러한 패킹공간(112)내 충진되는 패킹물질(120)중 슬라이드관(110)에 접촉되는 제1패킹물질(122)은 인체에 무해한 EPDM(Ethylene Propylene Diene Mixture, 이중합성고무)이 바람직하고, 이 제1패킹물질(122)위에 적층되어 가압되는 제2패킹물질(124)은 테프론파우더가 바람직하다. 상기 제1패킹물질(122)이 실리콘으로도 실시가능하다.Among the packing material 120 filled in the packing space 112, the first packing material 122 contacting the slide tube 110 is preferably EPDM (Ethylene Propylene Diene Mixture, double synthetic rubber), which is harmless to the human body. Teflon powder is preferably the second packing material 124 that is stacked on the first packing material 122 and pressed. The first packing material 122 may be made of silicon.

아울러 본 발명 신축 이음조인트장치의 패킹실린더에는 안전밸브(140)를 더 구비함이 바람직하며,이 안전밸브(140)에는 패킹실린더(111)내에 내압에 의하여 주입된 패킹물질(120,122,124)이 열화에 의하여 누출됨을 방지하기 위한 인디케이터(142)를 더 구비하여 플런저를 열었을 때 패킹물질(120)의 누출상태를 표시하여 알려주게 한다.In addition, the packing cylinder of the expansion joint joint device of the present invention is preferably further provided with a safety valve 140, the safety valve 140, the packing material (120, 122, 124) injected by internal pressure in the packing cylinder 111 to deterioration It is further provided with an indicator 142 to prevent leakage by displaying the state of leakage of the packing material 120 when the plunger is opened.

이와 같이 이루어진 본 발명 신축 이음조인트장치의 패킹실린더는 배관(110)의 신축 이음조인트에서 슬립관(130)을 슬립 이동하도록 상기 배관(110)의 패킹공간(113)으로 슬립관(130)이 슬립되도록 관착된다.The packing cylinder of the expansion joint joint device of the present invention made as described above slips the slip pipe 130 into the packing space 113 of the pipe 110 so as to slip the slip pipe 130 at the expansion joint of the pipe 110. To be observed.

이 상태에서 배관(110)의 패킹공간(113)과 슬립관(130)사이의 틈새를 통한 유체의 누출을 차단하도록 배관 외측에서 패킹공간(113)으로 연통하는 패킹실린더(111)의 플런저(112)를 열고 패킹물질(120)을 충진한다.In this state, the plunger 112 of the packing cylinder 111 communicating with the packing space 113 from the outside of the pipe to block the leakage of fluid through the gap between the packing space 113 of the pipe 110 and the slip pipe 130. ) And the packing material 120 is filled.

이때 패킹물질(120)은 상기 패킹공간(112)내에 상기 슬립관(130)과 배관(100)사이의 틈새를 차단하도록 인체에 무해한 제 1패킹물질(122)을 충진하도록 한뒤 상기 제1패킹물질(122)위에 패킹실린더(111)의 플런저(112)로서 가압/공급되는 제2패킹물질(124)을 충진하여 가압되게한다.In this case, the packing material 120 fills the first packing material 122 that is harmless to the human body to block the gap between the slip tube 130 and the pipe 100 in the packing space 112 and then the first packing material. The second packing material 124 that is pressurized / supplied as the plunger 112 of the packing cylinder 111 is filled on the 122 to be pressed.

이러한 패킹물질의 충진/가압으로 스터핑박스(110)저부의 슬립관(130)사이의 틈새는 제1패킹물질(122)로 충진되어 배관(100)내 유체의 누출을 차단하게 됨과 아 울러 이에 접촉하는 배관(100)을 흐르는 음용수에 일부 섞이더라도 인체에 영향을 주지않게 되는 것이다.The gap between the slip tube 130 at the bottom of the stuffing box 110 is filled with the first packing material 122 to block the leakage of the fluid in the pipe 100 by filling / pressing the packing material. Even if some of the drinking water flowing through the pipe 100 will not affect the human body.

이상 설명한 바와 같이 본 발명 신축 이음조인트장치의 패킹실린더는 그동안 패킹공간(113)내에 일반적인 인체 유해성 패킹물질로만 충진되어 음용수의 유체 이송시 인체 유해한 문제점이 있었으나, 본 발명은 음용수와 접촉하는 패킹물질이 인체 무해한 것으로 하고, 다시 그 위에 일반적으로 사용되는 테프론 파우더와 같은 유해성 패킹물질이 충진되도록 하여 배관의 신축 이음조인트장치가 음용수에도 사용가능하게 된 효과를 갖는다.As described above, the packing cylinder of the flexible joint joint device of the present invention has been filled with only the general human hazardous packing material in the packing space 113, and thus, there was a problem that the human body is harmful to the fluid transfer of the drinking water. It is considered to be harmless to the human body, and the harmful joint material such as Teflon powder, which is generally used thereon, is filled therein, so that the expansion joint joint device of the pipe can be used for drinking water.

Claims (6)

신축 이음조인트장치의 패킹실린더에 있어서, In the packing cylinder of the expansion joint joint device, 배관(100);Piping 100; 상기 배관(100)의 일단부에 용접 고정되며, 그 외측으로 패킹실린더(111)를 수직 설치하고, 그 내부에 플런저(112)로서 패킹물질(120)의 주입이 이루어지도록 하며, 저부는 소정의 패킹공간(113)을 형성하는 스터핑박스(110); One end of the pipe 100 is welded and fixed, and the packing cylinder 111 is vertically installed to the outside thereof, and the packing material 120 is injected as the plunger 112 therein, and the bottom part is predetermined. A stuffing box 110 forming a packing space 113; 상기 배관(100)과 배관(100)사이의 조인트부를 이루는 스터핑박스(110)의 패킹공간(113)에서 배관(100)보다 작은 직경으로 슬립가능하게 관착된 슬립관(130); A slip pipe 130 that is slipperably welded to a smaller diameter than the pipe 100 in the packing space 113 of the stuffing box 110 forming a joint portion between the pipe 100 and the pipe 100; 상기 패킹공간(112)내에 상기 슬립관과 배관사이의 틈새를 차단하기 위하여 상기 패킹공간과 슬립관 사이에 위치하는 제 1패킹물질(122); 및 A first packing material (122) positioned between the packing space and the slip tube to block a gap between the slip tube and the pipe in the packing space (112); And 상기 패킹공간(112)내에 상기 슬립관(130)과 배관(100)사이의 틈새를 차단하기 위하여 상기 패킹공간(113)과 슬립관(130) 사이에 위치하는 제 1패킹물질(122)과, 상기 패킹공간(112)내 상기 제1패킹물질(122)위에서 상기 패킹실린더(111)내부에 충진되어 상기 제1패킹물질(122)이 틈새를 형성하지 않도록 패킹실린더(111)의 플런저(112)로서 가압/공급되는 제2패킹물질(124)로 이루어진 패킹물질(120)을 포함하는 신축 이음조인트장치의 패킹실린더.A first packing material 122 positioned between the packing space 113 and the slip pipe 130 to block a gap between the slip pipe 130 and the pipe 100 in the packing space 112; The plunger 112 of the packing cylinder 111 is filled in the packing cylinder 111 on the first packing material 122 in the packing space 112 so that the first packing material 122 does not form a gap. Packing cylinder of the expansion joint joint device including a packing material 120 made of a second packing material (124) is pressurized / supplied. 제 1항에 있어서,The method of claim 1, 상기 제 1패킹물질(122)은 인체에 무해한 EPDM인 것을 특징으로 하는 신축 이음조인트장치의 패킹실린더.The first packing material 122 is a packing cylinder of the expansion joint joint device, characterized in that harmless to the human body EPDM. 제 1항에 있어서,The method of claim 1, 상기 제 1패킹물질(122)은 인체에 무해한 실리콘인 것을 특징으로 하는 신축 이음조인트장치의 패킹실린더.The first packing material 122 is a packing cylinder of the expansion joint joint device, characterized in that the harmless silicone. 제 1항 내지 제3항중 어느 한항에 있어서,The method according to any one of claims 1 to 3, 상기 제1패킹물질(122)위에 적층되어 가압되는 제2패킹물질(124)은 테프론파우더인 것을 특징으로 하는 신축 이음조인트장치의 패킹실린더.The packing cylinder of the expansion joint joint device, characterized in that the second packing material 124 is laminated on the first packing material 122 is pressed Teflon powder. 제 1항 내지 제3항중 어느 한항에 있어서, The method according to any one of claims 1 to 3, 상기 패킹실린더(111)에는 패킹실린더(111)내 패킹물질(120)이 열누출됨을 차단하기 위한 안전밸브(140)를 더 구비하는 것을 특징으로 하는 신축 이음조인트 장치.The packing cylinder 111, the expansion joint joint device characterized in that it further comprises a safety valve 140 for blocking the leakage of the packing material 120 in the packing cylinder (111). 제 5항에 있어서, The method of claim 5, 상기 안전밸브(140)은 그 차단상태를 알려주는 인디케이터(142)를 더 구비하는 것을 특징으로 하는 신축 이음조인트장치.The safety valve 140 is an expansion joint joint device characterized in that it further comprises an indicator (142) to inform the blocking state.
KR1020060070495A 2006-07-27 2006-07-27 Packing cylinder for expansion contraction joint apparatus KR100834849B1 (en)

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Cited By (8)

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CN101571221B (en) * 2009-06-16 2013-05-08 大连益多管道有限公司 Composite closed type sleeve compensator for steam
KR101329230B1 (en) * 2013-05-10 2013-11-13 조인트유창써멀시스템 주식회사 Improved packing forces expansion contraction joint part of drinking water pipe
CN103836290A (en) * 2014-03-19 2014-06-04 江苏星光波纹管有限公司 Flange-connecting type single sleeve expansion joint
CN103836289A (en) * 2014-03-19 2014-06-04 江苏鑫晟波纹管有限公司 Injection type single sleeve expansion joint
CN103953821A (en) * 2014-05-20 2014-07-30 大连益多管道有限公司 Multi-branch high-pressure material injection device
CN106151729A (en) * 2016-08-25 2016-11-23 南通艾迈特机械有限公司 A kind of pipeline compensator
CN106233049A (en) * 2014-03-31 2016-12-14 连结永昌热力管道***公司 The filler cylinder of expansion joint
US10400927B2 (en) 2016-10-13 2019-09-03 Chang Yup AN Earthquake-resistant flexible slip joint apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101571221B (en) * 2009-06-16 2013-05-08 大连益多管道有限公司 Composite closed type sleeve compensator for steam
KR101329230B1 (en) * 2013-05-10 2013-11-13 조인트유창써멀시스템 주식회사 Improved packing forces expansion contraction joint part of drinking water pipe
CN103836290A (en) * 2014-03-19 2014-06-04 江苏星光波纹管有限公司 Flange-connecting type single sleeve expansion joint
CN103836289A (en) * 2014-03-19 2014-06-04 江苏鑫晟波纹管有限公司 Injection type single sleeve expansion joint
CN106233049A (en) * 2014-03-31 2016-12-14 连结永昌热力管道***公司 The filler cylinder of expansion joint
US10253896B2 (en) 2014-03-31 2019-04-09 Joing Yoochang Thermal Systems Co., Ltd. Packing cylinder for expansion joint
CN103953821A (en) * 2014-05-20 2014-07-30 大连益多管道有限公司 Multi-branch high-pressure material injection device
CN106151729A (en) * 2016-08-25 2016-11-23 南通艾迈特机械有限公司 A kind of pipeline compensator
US10400927B2 (en) 2016-10-13 2019-09-03 Chang Yup AN Earthquake-resistant flexible slip joint apparatus

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