CN110848505A - Fire-encountering expansion device - Google Patents
Fire-encountering expansion device Download PDFInfo
- Publication number
- CN110848505A CN110848505A CN201911321826.7A CN201911321826A CN110848505A CN 110848505 A CN110848505 A CN 110848505A CN 201911321826 A CN201911321826 A CN 201911321826A CN 110848505 A CN110848505 A CN 110848505A
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- Prior art keywords
- fire
- expansion
- hole
- layer
- flexible
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003063 flame retardant Substances 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 238000005253 cladding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000009970 fire resistant effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 35
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 11
- 239000011247 coating layer Substances 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002250 progressing effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
Classifications
-
- 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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/04—Protection of pipes or objects of similar shape against external or internal damage or wear against fire or other external sources of extreme heat
-
- 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
- F16L21/00—Joints with sleeve or socket
- F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends
- F16L21/065—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends tightened by tangentially-arranged threaded pins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a fire-encountering expansion device, which comprises a flexible fireproof element arranged outside a pipeline connector, wherein the flexible fireproof element sequentially comprises a coating layer, a flame-retardant layer and an expansion layer from outside to inside, and the lengths of the coating layer, the flame-retardant layer and the expansion layer, which are perpendicular to the axis direction of the flexible fireproof element, are sequentially reduced, so that the expansion layer radially expands outwards when being heated in a fire. When a fire occurs, the device can gradually isolate open fire and insulate heat, so that the pipe fittings inside are protected from being damaged.
Description
Technical Field
The invention relates to the field of pipeline connecting equipment, in particular to an expansion device in case of fire.
Background
At present, pipelines are widely used as devices for transporting gas, liquid or fluid with solid particles. Such as a tap water pipeline, a gas pipeline, a sewage pipeline, etc. When the pipeline is installed, because the length of a single pipeline is limited, a plurality of pipelines are often required to be connected for use, and in order to facilitate the connection of the pipelines, the pipeline connector is invented.
The pipeline connector is used for being connected between two pipelines in need to the noose to this reaches the function of sealed pressure-bearing, makes intercommunication between each pipeline, and pipeline connector extensively is used for the pipe connection of different materials in trades such as oil, chemical industry, shipbuilding, platform, electric power, light industry, municipal administration and mechanical equipment.
However, the conventional pipe connectors used at present do not have fireproof performance, and cannot be used in occasions with fireproof requirements. Even when used, the sealing material in the pipe connector is carbonized and peeled off by the high temperature generated by combustion in case of fire, and the sealing effect cannot be obtained. The medium transported in the pipeline leaks, which causes greater safety accidents and economic losses.
Therefore, there is a need in the art to develop a new fire-fighting expansion device with a simple structure, which covers the outside of the pipe connector to protect the pipe connector from aging or falling off when it is exposed to fire.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides an expansion device in case of fire, which is used on the outer surface of the existing pipeline connector and comprises a metal layer, a flame-retardant cloth layer and an expansion layer.
In order to achieve the purpose, the invention provides the following specific technical scheme:
the utility model provides a meet fire expansion device, is including installing in the outside flexible fire prevention component of pipe connection ware, flexible fire prevention component outside-in includes coating, fire-retardant layer and inflation layer in proper order, coating, fire-retardant layer and inflation layer perpendicular to the length of flexible fire prevention component axis direction reduces in proper order, makes the inflation layer is radially outwards expanded when meeting fire and being heated.
Preferably, the coating is detachably connected to the pipe connector by a connection fastening means.
Preferably, the coating comprises a flexible metal casing, the fire-retardant layer comprises a fire-retardant cloth closely attached to the coating, and the expansion layer comprises an expansion module.
Preferably, in the flexible metal housing, the fixing portion is integrally formed with the ear portion, and the bent portion is provided with a serration for protecting both ends of the pipe connector in an axial direction; the fixing part comprises a first through hole and a second through hole which are used for fixing; the bending part is provided with a third through hole, and the first through hole is communicated with the third through hole.
Preferably, a bolt is arranged in the second through hole, and the ear part is fixed with the pipeline connector through the bolt.
Preferably, fixing nuts are arranged in the first through hole and the third through hole, and the connecting and fastening device comprises a fastening screw, a fixing nut and a pressing plate.
Preferably, the expansion module is made of a fire-resistant expansion material.
Preferably, the expansion module extends in a direction perpendicular to the axis of the flexible fire element.
Preferably, the number of the expansion modules is not less than 1, and a space is arranged between two adjacent expansion modules.
Preferably, the number of the flame-retardant cloth is not less than 1.
Aiming at the defect that the conventional pipeline connector in the prior art cannot realize the fireproof function, the invention has the beneficial effects that:
1. the three layers of detachable flexible fireproof elements are arranged outside the conventional pipeline connector, open fire and heat insulation are prevented from progressing layer by layer, and damage of external flame to the pipe fitting can be effectively prevented.
2. The device meet few cigarette and few dirt behind the fire firing, secondary damage when having avoided the fire fighter to fight a fire.
3. The flexible metal shell in the flexible fireproof element is in split design, so that the structure is light, and the installation is convenient.
4. The special-shaped design of the two axial ends of the flexible metal shell can effectively prevent open fire from invading from the side surface of the pipeline, and potential hidden danger is avoided.
5. The expansion module in the flexible fireproof element integrally expands after encountering high temperature to coat the pipe fitting and the pipeline connector, so that the temperature is insulated, and the damage of the joint of the pipe fitting is avoided.
Drawings
FIG. 1 is a front view of a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of a front view of a preferred embodiment of the present invention;
FIG. 3 is a top view of a preferred embodiment of the present invention;
FIG. 4 is a right side view of a preferred embodiment of the present invention;
FIG. 5 is a perspective view of a preferred embodiment of the present invention;
FIG. 6 is an expanded view of the ear portion and the securing portion in a preferred embodiment of the present invention;
FIG. 7 is an expanded view of a flexure in a preferred embodiment of the present invention;
FIG. 8 is a perspective view of another preferred embodiment of the present invention;
FIG. 9 is a development view of a coating layer in another preferred embodiment of the solution according to the invention;
wherein: 10-a coating layer, 11-an ear part, 12-a fixing part, 13-a bending part, 14-a sawtooth, 15-a first through hole, 16-a second through hole and 17-a third through hole; 20-a flame retardant layer; 30-an intumescent layer; 40-connecting a fastening device, 41-connecting a stud, 42-locknut, 43-flat pad, 44-fastening screw, 45-pressing plate and 46-fixing nut; 50-pipe connector, 51-locking member; 60-bolt.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
Referring to fig. 1 to 7, the invention discloses a fire-encountering expansion device, which comprises a flexible fireproof element arranged outside a pipeline connector 50, wherein the flexible fireproof element sequentially comprises a coating layer 10, a flame-retardant layer 20 and an expansion layer 30 from outside to inside, and the lengths of the coating layer 10, the flame-retardant layer 20 and the expansion layer 30 perpendicular to the axis direction of the flexible fireproof element are sequentially reduced, so that the expansion layer radially expands outwards when being heated in a fire. Further, the coating layer 10 includes a flexible metal shell, preferably made of stainless steel, or other metal materials such as aluminum, copper, iron, etc., so as to effectively prevent the invasion of external open fire, the flame retardant layer 20 includes a flame retardant cloth closely attached to the coating layer, and the expansion layer 30 includes an expansion module.
Further, the covering 10 is detachably coupled to the pipe connector 50 by a coupling fastening means 40.
Because the coating and the pipeline connector are made of metal materials, and the metal materials have the properties of expansion with heat and contraction with cold, a certain interval exists between the flexible fireproof element and the pipeline connector, so that a certain deformation space is ensured when the temperature of the flexible fireproof element and the pipeline connector changes. When the pipeline meets fire, because of the needs that separate the temperature, consequently set up the expansion module, when filling the interval between flexible fire prevention component and the pipeline connector, because the length of cladding 10, fire-retardant layer 20 and expansion layer 30 perpendicular to the axis direction reduces in proper order for the expansion layer is met radially outwards inflation when being heated of fire, in order to protect the pipe fitting, and isolated high temperature.
Further, the expansion module is made of fireproof expansion materials, and the expansion module integrally expands to cover the pipe fitting and the connector when meeting high temperature, so that further thermal insulation is performed. Preferably, the expansion module is in the form of a rectangular sheet and extends in a direction perpendicular to the axis of the flexible fire protection element, or in the form of a v-21274so that the expansion module will wrap more quickly and completely after the side is heated. In a preferred embodiment, the number of the expansion modules is not less than 1, and a space is arranged between every two adjacent expansion modules to ensure that the expansion modules do not damage the pipe while protecting the pipe by thermal expansion.
Further, the number of the flame-retardant cloth is not less than 1 layer, and specifically, the flame-retardant cloth can be arranged into a plurality of layers according to the fire-retardant grade, so that the effects of preventing residual open fire and insulating temperature are achieved.
In a preferred embodiment, the ear portion 11 is integrally formed with the fixing portion 12, and is connected and fixed with the bending portion 13 by the connection fastening means 40, and the bending portion 13 is provided with saw teeth 14 for protecting both ends of the pipe connector in the axial direction; the fixing part 12 comprises a first through hole 15 and a second through hole 16 for fixing; the bending part is provided with a third through hole 17, and the first through hole 15 is communicated with the third through hole 17; the connection fastening device 40 includes a fastening screw 44, a pressure plate 45 and a fixing nut 46, and the fixing nut 46 is welded or riveted in a through hole at the connection of the bending portion 13 and the fixing portion 12, i.e., the first through hole 15 and the third through hole 17. Specifically, the fastening screw 44 may be a countersunk screw, a half-head screw, an inner hexagon screw, an outer hexagon screw, or the like, and the fixing nut 46 may be a weld nut (an energy storage weld nut, a two-point, four-point weld nut), a rivet nut (a press rivet nut, a pull rivet nut), or the like.
Specifically, a bolt 60 is disposed in the second through hole 16, and the ear 11 is fixed to the pipe connector 50 by the bolt 60.
In another preferred embodiment, as shown in fig. 8, the flexible metal shell includes an ear portion 11, a fixing portion 12 and a bending portion 13 which are integrally formed; the bending part 13 is provided with saw teeth 14 for protecting both ends of the pipe connector in the axial direction; the fixing part 12 comprises a first through hole 15 and a second through hole 16 for fixing; the ears 11 are oppositely disposed to protect the locking member 51 of the pipe connector 50.
Further, a bolt 60 is disposed in the second through hole 16, and the ear 11 is fixed to the pipe connector 50 by the bolt 60.
Further, the connection fastening device 40 includes an engagement stud 41, a locknut 42 and a flat pad 43, the engagement stud 41 is welded or riveted to the outer shell of the pipe connector 50, the locknut 42 and the flat pad 43 are installed in the first through hole 15, and the cladding 10 and the pipe connector 50 are fixed by the engagement stud 41.
Aiming at the defects in the prior art, the invention has the beneficial effects that:
1. the three layers of detachable flexible fireproof elements are arranged outside the conventional pipeline connector, open fire and heat insulation are prevented from progressing layer by layer, and damage of external flame to the pipe fitting can be effectively prevented.
2. The device meet few cigarette and few dirt behind the fire firing, secondary damage when having avoided the fire fighter to fight a fire.
3. The split type design of flexible metal casing in the flexible fire prevention component, the wholeness is stronger, and the structure is light, the installation of being convenient for.
4. The special-shaped design of the two axial ends of the flexible metal shell can effectively prevent open fire from invading from the side surface of the pipeline, and potential hidden danger is avoided.
5. The expansion module in the flexible fireproof element integrally expands after encountering high temperature to coat the pipe fitting and the pipeline connector, so that the temperature is insulated, and the damage of the joint of the pipe fitting is avoided.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (10)
1. The utility model provides an expansion device meets fire, is including installing the flexible fire element in the pipeline connector outside, its characterized in that, flexible fire element outside-in includes coating, fire-retardant layer and inflation layer in proper order, coating, fire-retardant layer and inflation layer perpendicular to the length of flexible fire element axis direction reduces in proper order, makes the inflation layer radially outwards expands when meeting fire and being heated.
2. The fire expansion apparatus of claim 1, wherein said cladding is removably attached to said pipe connector by attachment fasteners.
3. The fire-encountering expansion device of claim 2, wherein the cladding comprises a flexible metal housing, the fire-retardant layer comprises a fire-retardant cloth in close proximity to the cladding, and the expansion layer comprises an expansion module.
4. The fire expansion device of claim 3, wherein in the flexible metal housing, the fixing portion is formed integrally with the ear portion, and the bent portion is provided with serrations for protecting both ends of the pipe connector in the axial direction; the fixing part comprises a first through hole and a second through hole which are used for fixing; the bending part is provided with a third through hole, and the first through hole is communicated with the third through hole.
5. The fire expansion device of claim 4, wherein a bolt is disposed in the second through hole, and the ear is secured to the conduit coupler by the bolt.
6. The fire-encountering expansion device according to claim 5, wherein fixing nuts are arranged in the first through hole and the third through hole, and the connecting and fastening device comprises a fastening screw, a fixing nut and a pressure plate.
7. The fire inflation device of claim 3, wherein the inflation module is made of a fire-resistant intumescent material.
8. The fire inflation device of claim 7, wherein the inflation module extends in a direction perpendicular to the axis of the flexible fire protection element.
9. The fire-encountering expansion device according to claim 7, wherein the number of the expansion modules is not less than 1, and a space is provided between two adjacent expansion modules.
10. The fire-encountering expansion device of claim 3, wherein the number of fire-retardant cloths is not less than 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911321826.7A CN110848505A (en) | 2019-12-20 | 2019-12-20 | Fire-encountering expansion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911321826.7A CN110848505A (en) | 2019-12-20 | 2019-12-20 | Fire-encountering expansion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110848505A true CN110848505A (en) | 2020-02-28 |
Family
ID=69609992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911321826.7A Pending CN110848505A (en) | 2019-12-20 | 2019-12-20 | Fire-encountering expansion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110848505A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025226A (en) * | 2021-03-22 | 2021-06-25 | 朗缪环保科技(天津)有限公司 | Aerogel fireproof heat-insulation coating |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0079457A1 (en) * | 1981-11-05 | 1983-05-25 | Immanuel Straub | Pipe coupling and its utilization |
| DE8533204U1 (en) * | 1985-11-26 | 1986-01-16 | Kirchhoff GmbH & Co, 5884 Halver | Device for connecting two pipes from vehicle exhaust systems |
| US5346265A (en) * | 1992-05-18 | 1994-09-13 | Metu-System Meinig Kg | Coupling sleeve for connecting thin-walled pipe ends |
| WO2001081814A1 (en) * | 2000-04-22 | 2001-11-01 | Straub-Werke Ag | Pipe coupling |
| EP1223375A1 (en) * | 2001-01-08 | 2002-07-17 | Bluetech Holding S.A. | Sealing ring for modular ducts and modular duct incorporating said ring |
| DE10325441A1 (en) * | 2003-06-05 | 2005-01-13 | Manfred Wantoch | Pipe connector comprises split ring whose outer surfaces form e.g. saw-tooth connecting system, allowing it to be fitted on pipes of different diameter |
| US20080224079A1 (en) * | 2005-07-29 | 2008-09-18 | Yasuhide Maruyama | Valve having diameter-reducible joint part, joint for diameter reduction, and plumbing system using these |
| EP2644961A2 (en) * | 2012-03-30 | 2013-10-02 | Doyma GmbH & Co | Fire protection device in the transition to a plastic pipe |
| KR101542063B1 (en) * | 2014-04-25 | 2015-08-05 | (주) 영남메탈 | Pip Coupler with the fireproof cover |
| WO2016186486A1 (en) * | 2015-05-20 | 2016-11-24 | J. Van Walraven Holding B.V. | Adjustable fire stop collar |
| JP2017072164A (en) * | 2015-10-05 | 2017-04-13 | 日本ヴィクトリック株式会社 | Expansive pipe joint structure |
| CN107830311A (en) * | 2017-11-30 | 2018-03-23 | 苏州市君悦新材料科技股份有限公司 | A kind of detachable muff of feature |
| CN108194741A (en) * | 2018-01-29 | 2018-06-22 | 普派流体技术（苏州）有限公司 | A kind of supply air line of compressed gas |
| US20190331283A1 (en) * | 2016-12-02 | 2019-10-31 | Total Piping Solutions, Inc. | Encapsulation sleeve gasket assembly with detachable inner layer |
| CN110886929A (en) * | 2019-12-20 | 2020-03-17 | 北京吉瑞普管道技术有限公司 | Protection device for connecting part |
-
2019
- 2019-12-20 CN CN201911321826.7A patent/CN110848505A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0079457A1 (en) * | 1981-11-05 | 1983-05-25 | Immanuel Straub | Pipe coupling and its utilization |
| DE8533204U1 (en) * | 1985-11-26 | 1986-01-16 | Kirchhoff GmbH & Co, 5884 Halver | Device for connecting two pipes from vehicle exhaust systems |
| US5346265A (en) * | 1992-05-18 | 1994-09-13 | Metu-System Meinig Kg | Coupling sleeve for connecting thin-walled pipe ends |
| WO2001081814A1 (en) * | 2000-04-22 | 2001-11-01 | Straub-Werke Ag | Pipe coupling |
| EP1223375A1 (en) * | 2001-01-08 | 2002-07-17 | Bluetech Holding S.A. | Sealing ring for modular ducts and modular duct incorporating said ring |
| DE10325441A1 (en) * | 2003-06-05 | 2005-01-13 | Manfred Wantoch | Pipe connector comprises split ring whose outer surfaces form e.g. saw-tooth connecting system, allowing it to be fitted on pipes of different diameter |
| US20080224079A1 (en) * | 2005-07-29 | 2008-09-18 | Yasuhide Maruyama | Valve having diameter-reducible joint part, joint for diameter reduction, and plumbing system using these |
| EP2644961A2 (en) * | 2012-03-30 | 2013-10-02 | Doyma GmbH & Co | Fire protection device in the transition to a plastic pipe |
| KR101542063B1 (en) * | 2014-04-25 | 2015-08-05 | (주) 영남메탈 | Pip Coupler with the fireproof cover |
| WO2016186486A1 (en) * | 2015-05-20 | 2016-11-24 | J. Van Walraven Holding B.V. | Adjustable fire stop collar |
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| US20190331283A1 (en) * | 2016-12-02 | 2019-10-31 | Total Piping Solutions, Inc. | Encapsulation sleeve gasket assembly with detachable inner layer |
| CN107830311A (en) * | 2017-11-30 | 2018-03-23 | 苏州市君悦新材料科技股份有限公司 | A kind of detachable muff of feature |
| CN108194741A (en) * | 2018-01-29 | 2018-06-22 | 普派流体技术（苏州）有限公司 | A kind of supply air line of compressed gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025226A (en) * | 2021-03-22 | 2021-06-25 | 朗缪环保科技(天津)有限公司 | Aerogel fireproof heat-insulation coating |
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