CN110873255A - Low-temperature pipeline flange cladding device and method - Google Patents
Low-temperature pipeline flange cladding device and method Download PDFInfo
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- CN110873255A CN110873255A CN201910768932.3A CN201910768932A CN110873255A CN 110873255 A CN110873255 A CN 110873255A CN 201910768932 A CN201910768932 A CN 201910768932A CN 110873255 A CN110873255 A CN 110873255A
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- flange
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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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
- F16L55/17—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose
- F16L55/172—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe by means of rings, bands or sleeves pressed against the outside surface of the pipe or hose the ring, band or sleeve being tightened by a tangentially arranged threaded pin and a nut
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
The invention discloses a low-temperature pipeline flange coating device and a method, wherein two semi-annular coating covers surround a flange of a pipeline, a containing groove on the inner peripheral surface of each coating cover is matched to form an annular sealing cavity, the sealing cavity coats the flange, then a valve at a drainage hole on each coating cover is opened, then a tetrafluoro sealing material is added to the butt joint position of each coating cover and the connecting position of each coating cover and the pipeline, then the two coating covers are locked and fixed through fastening bolts, finally the valve is closed, a heat insulation material on the pipeline is repaired, and the plugging is finished. Two cover covers which are symmetrically arranged up and down are mutually matched to wrap the flange of the pipeline, and the leakage point of the flange of the pipeline is plugged through the sealing cavity, so that gas leakage is prevented. The double-cover pipe joint is very simple in structure, only two covers need to be butted and locked on a pipeline, operation is convenient and fast, and practicability is high.
Description
Technical Field
The invention relates to a device and a method for coating a flange of a low-temperature pipeline, in particular to a device and a method for coating a flange of a natural gas pipeline.
Background
The most easily-leaked position of the gas pipeline is the butt joint position of two pipelines, and the factors of pipeline deformation, seal aging, valve loosening and the like can cause leakage at the butt joint position. In the existing industry of leakage plugging at oil and gas pipeline flanges, the leakage treatment measures are generally two methods: the first method is to stop production, replace the LNG (natural gas) gas in the pipeline, and then replace a new flange, which takes a long time to treat leakage, increases safety risks, and undoubtedly causes certain economic losses; the method for treating the leakage of the flange firstly needs a certain time to manufacture the fixture with a complex structure, secondly is easy to cause perforation among sealing media when the sealing media are injected, so that the sealing is ineffective, and the sealing media have poor low-temperature resistance and low success rate of sealing.
Disclosure of Invention
The invention provides a low-temperature pipeline flange cladding device and method, which can quickly perform leaking stoppage and have a good sealing effect. The technical scheme adopted by the invention for solving the technical problems is as follows:
the low-temperature pipeline flange coating device comprises two semicircular coating covers which are arranged in an up-and-down symmetrical mode, the two coating covers are spliced to form a circular shaft sleeve structure, accommodating grooves which are communicated in the circumferential direction are formed in the inner circumferential surface of each coating cover, the accommodating grooves of the two coating covers are matched to enclose a circular sealing cavity for wrapping a flange, butt-joint folding edges extending towards the outer side are respectively arranged on the butt-joint end surfaces of the two coating covers, sealing layers are respectively arranged between the butt-joint folding edges of the two coating covers and on the butt-joint end surfaces of the two coating covers, and the butt-joint folding edges of the two coating covers are locked and fixed together through bolts.
In a preferred embodiment: the lower covering cover is provided with a drainage hole at the bottom end, and the outer side of the drainage hole is connected with a valve.
In a preferred embodiment: the valve is a one-way valve.
In a preferred embodiment: the sealing layer is a tetrafluoro sealing layer.
In a preferred embodiment: the bolt is a quick bolt.
A method for coating flanges of low-temperature pipelines includes the steps of firstly, deicing upstream pipelines and downstream pipelines of leakage flanges by high-temperature high-pressure steam, hanging two semi-annular coating covers on the flanges of the pipelines after deicing is finished, enabling accommodating grooves in the inner peripheral surfaces of the two coating covers to be matched and to form annular sealing cavities, enabling the sealing cavities to surround the flanges, then opening valves at drainage holes in the coating covers, adding a tetrafluoro sealing material to the butt joint positions of the two coating covers and the connecting positions of the coating covers and the pipelines, locking and fixing the two coating covers through fastening bolts, finally closing the valves, repairing heat insulation materials on the pipelines, and finishing plugging.
In a preferred embodiment: and locking and fixing the two covering covers by using quick bolts.
Compared with the background technology, the technical scheme has the following advantages:
1. two cover covers which are symmetrically arranged up and down are mutually matched to wrap the flange of the pipeline, and the leakage point of the flange of the pipeline is plugged through the sealing cavity, so that gas leakage is prevented. The double-cover pipe joint is very simple in structure, only two covers need to be butted and locked on a pipeline, operation is convenient and fast, and practicability is high.
2. The bottom end of the covering cover positioned on the lower side is provided with a drainage hole, when the covering cover is operated, the valve on the outer side of the drainage hole is opened firstly before the covering cover is not locked, so that the pressure intensity in the sealing cavity is maintained at a normal level, and after the covering cover is locked, the valve is closed to realize sealing and leakage prevention, thereby being beneficial to screw locking and fixing and improving the sealing property.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic view illustrating a flange cladding apparatus for a cryogenic pipeline according to the present invention.
Detailed Description
Referring to fig. 1, the low-temperature pipeline flange cladding device includes two semicircular cladding covers 10 which are symmetrically arranged up and down, the two cladding covers 10 are spliced to form a circular shaft sleeve structure, the inner circumferential surface of the cladding cover is provided with a receiving groove 12 which is through in the circumferential direction, the receiving grooves of the two cladding covers are matched to form a circular sealing cavity, and thus the sealing cavity surrounds a flange 22 of the connection end surface of two pipelines 20. Butt-joint folded edges 14 extending towards the outside are respectively arranged on the butt-joint end faces of the two covering covers 10, sealing layers 30 are respectively arranged between the butt-joint folded edges 14 of the two covering covers and on the butt-joint end faces, bolt holes are arranged on the butt-joint folded edges 12 of the two covering covers 10, and the two covering covers are locked and fixed together through bolts. Preferably using quick bolts for locking.
Preferably, the lower covering 10 is provided with a drainage hole 16 at the bottom end, and a valve 18 is connected to the outside of the drainage hole 16. Further preferably, the valve 18 is a one-way valve.
In this embodiment, the sealing layer 30 is a teflon sealing layer, but may be other sealing compound or sealing ring.
In the practical use process, the periphery of the flange 22 of the pipeline 20 is firstly deiced by high-temperature high-pressure steam, after the deicing is finished, the two covers 10 are quickly enclosed on the pipeline 20, the flange 22 is framed by the sealing chamber, the valve 18 at the drainage hole 16 is opened, the tetrafluoro sealing material is quickly added to the butt joint position of the covers 10 and the connecting position of the covers and the pipeline 20, the bolt is fastened, the valve 18 is closed, finally, the heat insulation material is repaired, and the plugging is finished.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (7)
1. Low temperature pipeline flange cladding device, its characterized in that: the flange-type half-ring-shaped cover comprises two half-ring-shaped cover bodies which are symmetrically arranged up and down, the two cover bodies are spliced to form a circular shaft sleeve structure, accommodating grooves which are communicated in the circumferential direction are formed in the inner circumferential surface of each cover body, the accommodating grooves of the two cover bodies are matched to enclose a circular sealing cavity for enclosing a flange, butt-joint folding edges which extend towards the outer side are respectively arranged on the butt-joint end surfaces of the two cover bodies, sealing layers are respectively arranged between the butt-joint folding edges of the two cover bodies and on the butt-joint end surfaces of the two cover bodies, and the butt-joint folding edges of the two cover bodies are locked and fixed together through bolts.
2. The cryogenic pipe flange cladding apparatus of claim 1, wherein: the lower covering cover is provided with a drainage hole at the bottom end, and the outer side of the drainage hole is connected with a valve.
3. The cryogenic pipe flange cladding apparatus of claim 2, wherein: the valve is a one-way valve.
4. The cryogenic pipe flange cladding apparatus of claim 1, wherein: the sealing layer is a tetrafluoro sealing layer.
5. The cryogenic pipe flange cladding apparatus of claim 1, wherein: the bolt is a quick bolt.
6. The low-temperature pipeline flange coating method is characterized by comprising the following steps: the method comprises the steps of firstly realizing deicing treatment on upstream and downstream pipelines of a leakage flange by using high-temperature high-pressure steam, enclosing the flange of the pipeline by two semi-annular coating covers after deicing is finished, enclosing an annular sealing cavity by the accommodating grooves on the inner peripheral surface of the two coating covers in a matching way, enclosing the flange by the sealing cavity, opening a valve at a drainage hole on the coating covers, adding a tetrafluoro sealing material to the butt joint position of the two coating covers and the connecting position of the coating covers and the pipeline, locking and fixing the two coating covers by fastening bolts, closing the valve, repairing a heat insulation material on the pipeline, and finishing plugging.
7. The cryogenic pipe flange cladding apparatus of claim 6, wherein: and locking and fixing the two covering covers by using quick bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768932.3A CN110873255A (en) | 2019-08-20 | 2019-08-20 | Low-temperature pipeline flange cladding device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910768932.3A CN110873255A (en) | 2019-08-20 | 2019-08-20 | Low-temperature pipeline flange cladding device and method |
Publications (1)
| Publication Number | Publication Date |
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| CN110873255A true CN110873255A (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910768932.3A Pending CN110873255A (en) | 2019-08-20 | 2019-08-20 | Low-temperature pipeline flange cladding device and method |
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| CN (1) | CN110873255A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928055A (en) * | 2020-08-17 | 2020-11-13 | 南通世睿电力科技有限公司 | Hoop type pipeline reconstruction sealing and plugging process |
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| KR20170002205U (en) * | 2015-12-14 | 2017-06-22 | 한전케이피에스 주식회사 | Jacket tool for pipe ice plugging |
| CN206369048U (en) * | 2016-12-03 | 2017-08-01 | 晏丽颖 | A kind of hydraulic pressure top-closed structure pipeline sealing device |
| CN206846178U (en) * | 2016-12-21 | 2018-01-05 | 中国人民武装警察部队学院 | A kind of LNG conveyance conduits straight tube leakage-stopping instrument |
| CN207729133U (en) * | 2017-11-30 | 2018-08-14 | 中国一冶集团有限公司 | Gas medium pipe flange reveals online processing device |
| CN109538876A (en) * | 2018-12-21 | 2019-03-29 | 上海市特种设备监督检验技术研究院 | Low-temperature liquefaction vehicle fuel tank car control box blank flange device for plugging |
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2019
- 2019-08-20 CN CN201910768932.3A patent/CN110873255A/en active Pending
Patent Citations (14)
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| CN202327510U (en) * | 2011-11-24 | 2012-07-11 | 四川德源石油天然气工程有限公司 | Flange pressurized leak stoppage structure |
| CN102606820A (en) * | 2012-03-27 | 2012-07-25 | 航天晨光股份有限公司 | Flange connector for vacuum insulation low-temperature pipelines |
| CN203258207U (en) * | 2013-04-24 | 2013-10-30 | 苏州赛智达智能科技有限公司 | Seal joint for leading out wire in LNG container |
| CN203395495U (en) * | 2013-06-25 | 2014-01-15 | 兰丽冬 | Enhancement structure for weak part of pipeline |
| CN203757278U (en) * | 2013-12-27 | 2014-08-06 | 惠生（南通）重工有限公司 | Low temperature liquid leakage protection device |
| CN204739266U (en) * | 2015-05-29 | 2015-11-04 | 夏步前 | LNG ( liquefied natural gas ) hangs down resistance automatic control check valve device |
| KR20170002205U (en) * | 2015-12-14 | 2017-06-22 | 한전케이피에스 주식회사 | Jacket tool for pipe ice plugging |
| CN205402234U (en) * | 2016-03-10 | 2016-07-27 | 任焕轩 | LNG return -air rifle |
| CN205424267U (en) * | 2016-03-18 | 2016-08-03 | 河北钢铁股份有限公司承德分公司 | Gas piping presses plugging device in area |
| CN206369048U (en) * | 2016-12-03 | 2017-08-01 | 晏丽颖 | A kind of hydraulic pressure top-closed structure pipeline sealing device |
| CN206846178U (en) * | 2016-12-21 | 2018-01-05 | 中国人民武装警察部队学院 | A kind of LNG conveyance conduits straight tube leakage-stopping instrument |
| CN106678466A (en) * | 2017-01-15 | 2017-05-17 | 浙江海洋大学 | Submarine natural gas transportation device |
| CN207729133U (en) * | 2017-11-30 | 2018-08-14 | 中国一冶集团有限公司 | Gas medium pipe flange reveals online processing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111928055A (en) * | 2020-08-17 | 2020-11-13 | 南通世睿电力科技有限公司 | Hoop type pipeline reconstruction sealing and plugging process |
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| PB01 | Publication | ||
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Application publication date: 20200310 |