CN110067909B - Sealing device and method for emergency maintenance of pipeline - Google Patents
Sealing device and method for emergency maintenance of pipeline Download PDFInfo
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- CN110067909B CN110067909B CN201910457388.0A CN201910457388A CN110067909B CN 110067909 B CN110067909 B CN 110067909B CN 201910457388 A CN201910457388 A CN 201910457388A CN 110067909 B CN110067909 B CN 110067909B
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- half flange
- flange
- pipeline
- upper half
- lower half
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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
- F16L55/1725—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 in which the threaded pin is rigid with the hose encircling member
Abstract
The invention discloses a sealing device and a method for emergency maintenance of a pipeline, wherein the device comprises: the left upper half flange, the left lower half flange, the right upper half flange, the right lower half flange, the sealing element and the plurality of bolts; the left upper half flange and the left lower half flange are connected through a bolt to form a left flange; the right upper half flange and the right lower half flange are connected through bolts to form a right flange; the left flange and the right flange are respectively installed with the pipeline and tightly hold the left upper half flange and the left lower half flange, and the right upper half flange and the right lower half flange are connected through bolts to form a compression load in the vertical direction on the sealing element so as to fasten the sealing element; the left upper half flange and the right upper half flange, and the left lower half flange and the right lower half flange are connected through bolts to form a compression load in the horizontal direction on the sealing element so as to fasten the sealing element; the device solves the technical problems of pipeline prevention and emergency maintenance in narrow space and high-temperature and high-pressure harsh environment, and provides necessary equipment and method for maintaining pipeline parts.
Description
Technical Field
The invention relates to the field of pipeline maintenance, in particular to a sealing device and method for emergency maintenance of a pipeline.
Background
The pressure-bearing pipeline type component has high failure rate in service under severe working conditions of high temperature, high pressure and radiation for a long time, and once the pipeline leaks, the pipeline type component has great risk to the safe operation of equipment. The maintenance of the pipeline has the characteristics of long period, high cost and the like.
From the literature published at present, most of pipeline maintenance is directed at the conventional pipeline, and the conventional method such as direct welding is limited by the conditions of the thickness of the pipeline wall, the preparation condition of welding tools and materials, the operation space, the technical level of welders and the like; the pipe end is provided with a pipe cap or a valve, the method is complex to implement and needs to damage the original pipeline to a certain extent; the pipe wall is additionally provided with the clamp, the method is suitable for the occasions of normal temperature and normal pressure, the operation is simple and convenient, but the time period of use is limited because the sealing element is easy to age; replacement of new pipes, which is complicated, requires dismantling of the old pipe and installation of the new pipe
Disclosure of Invention
In order to implement emergency maintenance on pipeline leakage, meet the requirements of pipeline mechanical maintenance process and solve the technical problems of pipeline prevention and emergency maintenance in narrow space and severe environment of high temperature and high pressure, a set of mechanical sealing device and installation method are developed to provide necessary equipment and method for pipeline part maintenance.
A preventive and emergency maintenance measure is urgently needed for defects of special welding seams and pipelines, so that quick emergency response of defect maintenance is realized, and safe operation of equipment is guaranteed. A set of mechanical sealing device is developed aiming at leakage of a pipeline, a sealing ring is installed around a defect, a certain pretightening force is provided through the sealing device, the sealing ring is compressed to form a closed space, and the defect is isolated from the outside.
The method is different from the prior method, adopts a flange type structure, the upper and lower groups of flanges are respectively installed and clasped with the pipeline, the high-temperature and high-pressure resistant sealing element is positioned on the outer surface of the leakage point of the pipeline, the bolts between the inner surface of the flange and the left and right flanges provide compression force to tightly press the sealing element on the leakage point, and the leakage sealing of the pipeline is realized. The sealing device has the advantages of correct design principle, reasonable structural design, strong stability of the established process method, easy operation and short maintenance period, and is particularly suitable for occasions needing emergency maintenance.
To achieve the above object, the present application has provided, in an aspect, a sealing device for emergency maintenance of a pipeline, the device including:
the left upper half flange, the left lower half flange, the right upper half flange, the right lower half flange, the sealing element and the plurality of bolts; the left upper half flange and the left lower half flange are connected through a bolt to form a left flange; the right upper half flange and the right lower half flange are connected through bolts to form a right flange; the left flange and the right flange are respectively and tightly held with the pipeline, and the right side of the upper end of the left upper half flange is provided with a first extension section extending rightwards; a second extension section extending rightwards is arranged on the right side of the lower end of the left lower half flange; a third extension section extending leftwards is arranged on the left side of the lower end of the right upper half flange; a fourth extension section extending leftwards is arranged on the left side of the lower end of the right lower half flange; the sealing element is attached to the outer surface of a leakage point of the pipeline and is positioned in a gap between the extension section of the left flange and the outer surface of the pipeline; the third extension section is inserted into a gap between the first extension section and the pipeline, and the fourth extension section is inserted into a gap between the second extension section and the pipeline; the left upper half flange and the left lower half flange, and the right upper half flange and the right lower half flange are connected through bolts to form a compression load in the vertical direction on the sealing element so as to fasten the sealing element; the upper left half flange and the upper right half flange, and the lower left half flange and the lower right half flange are connected through bolts to form compression load in the horizontal direction for the sealing element to be fastened.
Furthermore, the left upper half flange and the left lower half flange are vertically symmetrical, and the right upper half flange and the right lower half flange are vertically symmetrical.
Furthermore, the device also comprises a washer and a nut which are used correspondingly to the bolt, wherein the washer is positioned between the bolt and the flange, and the nut is arranged at the end head of the bolt.
Further, the pipeline is a pressure-bearing pipeline, the pressure of the pressure-bearing pipeline is 0-17.2 Mpa, and the temperature of the pipeline is 0-350 ℃.
Further, the distance or gap between the pipe and the obstacle is greater than 1.5 pipe radii.
Further, the sealing element is a sealing ring, the inner diameter of the sealing element is matched with the outer diameter of the pipeline, and the size of a gap between the first extension section and the pipeline is the same as that of a gap between the second extension section and the pipeline, and the size of the gaps is matched with the thickness of the sealing ring.
Further, the extension lengths of the first extension section and the second extension section are equal, and the extension lengths of the first extension section and the second extension section are both greater than the length of the sealing element.
Further, the sealing element is made of graphite material.
Further, the height dimension of the third extension section is matched with the gap dimension between the first extension section and the pipeline, and the height dimension of the fourth extension section is matched with the gap dimension between the second extension section and the pipeline.
In another aspect, the present application further provides a sealing method for emergency maintenance of a pipeline, the method being based on the sealing device for emergency maintenance of a pipeline, the method including:
cleaning a preset outer surface area of a leakage point, positioning the left upper half flange and the left lower half flange in the preset leakage point area, and mounting the left upper half flange and the left lower half flange together through a bolt group to be tightly attached to the outer wall of the pipeline;
inserting a sealing element into gaps between the pipeline and the left upper half flange and the left lower half flange, and staggering the seam of the sealing element with the seam of the left upper half flange and the seam of the left lower half flange;
installing a right upper half flange and a right lower half flange, and installing the right upper half flange and the right lower half flange together through a bolt group to be tightly attached to the outer wall of the pipeline;
the left upper half flange and the right upper half flange and the left lower half flange and the right lower half flange are connected through bolt groups;
and preset pretightening force is symmetrically applied to the bolt group, so that a compression load is formed on the sealing element.
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
(1) the device realizes the test of various sealing performance tests, the device runs stably, and the precision meets the design requirements.
(2) The device has simple and portable structure and simple operation, and can be applied to the emergency maintenance of the pipeline under the harsh environment of high temperature and high pressure.
(3) Compared with other maintenance methods, the device and the method for maintaining the pipeline leakage have the advantages of short maintenance period, simplicity in operation, high reliability and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is a schematic structural view (cross-sectional view) of a pipe repair seal;
FIG. 2 is a schematic structural view (front view) of a pipe repair seal;
FIGS. 3 a-3 c are schematic structural views of a flange A;
4 a-4C are schematic structural views of a flange C;
wherein, 1 is a pipeline, 2 is a flange A, 3 is a flange D, 4 is a flange C, 5 is a sealing element, 6 is a flange B, 7 is a bolt, 8 is a gasket, 9 is a gasket, and 10 is a bolt.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
The pipe sealing device is shown in figures 1 and 2. The invention describes that: the utility model provides a pipeline emergency maintenance uses sealing device, can realize the prevention and the emergency maintenance of high temperature high pressure pipeline leakage, its major structure includes mounting flange, sealing member, bolt, packing ring etc.. Wherein the sealing element is made of high-temperature-resistant, corrosion-resistant and radiation-resistant graphite material.
Aiming at the emergency maintenance of the high-temperature and high-pressure pipeline, the device innovatively develops a pure mechanical sealing device and an installation method. The device is simple to install and operate, adopts high-temperature-resistant, corrosion-resistant and radiation-resistant materials to manufacture the sealing element, and can be used for preventing leakage of a pressure-bearing pipeline and emergency maintenance. This device adopts the butt-joint formula flange structure, embraces tightly at vertical direction and pipeline, provides the pretightning force through the bolt in the horizontal direction and compresses tightly the sealing member, has solved whole device and pipeline fixed restraint difficult problem.
When the pipeline leaks, the maintenance process of the device is as follows:
(1) removing a predetermined outer surface area near the leakage point, positioning the flange A and the flange B near the leakage point, and mounting the flange A and the flange B together through a bolt group 10 and a gasket group 9 to be tightly attached to the outer wall of the pipeline;
(2) inserting two sealing elements 5 into gaps between the pipeline and the flange respectively, and staggering the seams of the sealing elements 5 with the seams of the flange A and the flange B;
(3) installing a right flange D and a right flange C, and installing the right flange D and the right flange C together through a bolt group 10 and a gasket group 9 to be tightly attached to the outer wall of the pipeline;
(4) connecting the flange a and D, the flange C and the flange B by a plurality of bolts 7 and forming a compressive load on the seal 5;
(5) a predetermined pre-tension is symmetrically applied to the bolt set 7, which results in a compressive load on the sealing element 5.
The application relates to a special sealing device for emergency maintenance of leakage of pipeline parts. The device adopts flange formula structure, parts such as left flange, right flange, sealing member, bolt, and two sets of flanges are held tightly with the piping erection respectively, and the sealing member is located the pipeline leakage point surface, and the bolt between flange internal surface, the left and right flange provides compressive force, compresses tightly the sealing member on the leakage point, has realized the leakage sealing of pipeline.
This device is used for the emergent maintenance of pipeline class part leakage, sealing device includes: two left flanges, two right flanges, the flange includes a semi-cylinder and a step, and a sealing member contact leaks the surface of pipeline to prevent to leak, and a set of bolt is used for holding the flange tightly with the pipeline, and a set of flange is used for passing fastening load from the flange to the sealing member.
The corresponding method of the device is used for repairing the leakage of the pipeline parts and comprises the following steps: removing a predetermined outer surface area near the leakage point, positioning the left and right flanges near the leakage point, assembling them together by bolts, inserting a sealing member into a gap between the pipe and the flanges, installing the right and left flanges, connecting the left and right flanges by a plurality of connecting members, and applying a compressive load to the sealing member to prevent re-leakage.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method for sealing in emergency maintenance of a pipeline, said method being based on a sealing device for emergency maintenance of a pipeline, said device comprising:
the left upper half flange, the left lower half flange, the right upper half flange, the right lower half flange, the sealing element and the plurality of bolts; the left upper half flange and the left lower half flange are connected through a bolt to form a left flange; the right upper half flange and the right lower half flange are connected through bolts to form a right flange; the left flange and the right flange are respectively and tightly held with the pipeline, and the right side of the upper end of the left upper half flange is provided with a first extension section extending rightwards; a second extension section extending rightwards is arranged on the right side of the lower end of the left lower half flange; a third extension section extending leftwards is arranged on the left side of the lower end of the right upper half flange; a fourth extension section extending leftwards is arranged on the left side of the lower end of the right lower half flange; the sealing element is attached to the outer surface of a leakage point of the pipeline and is positioned in a gap between the extension section of the left flange and the outer surface of the pipeline; the third extension section is inserted into a gap between the first extension section and the pipeline, and the fourth extension section is inserted into a gap between the second extension section and the pipeline; the left upper half flange and the left lower half flange, and the right upper half flange and the right lower half flange are connected through bolts to form a compression load in the vertical direction on the sealing element so as to fasten the sealing element; the left upper half flange and the right upper half flange, and the left lower half flange and the right lower half flange are connected through bolts to form a compression load in the horizontal direction on the sealing element so as to fasten the sealing element;
the distance or gap between the pipe and the obstacle is greater than 1.5 times the radius of the pipe;
the method comprises the following steps:
cleaning a preset outer surface area of a leakage point, positioning the left upper half flange and the left lower half flange in the preset leakage point area, and mounting the left upper half flange and the left lower half flange together through a bolt group to be tightly attached to the outer wall of the pipeline;
inserting a sealing element into gaps between the pipeline and the left upper half flange and the left lower half flange, and staggering the seam of the sealing element with the seam of the left upper half flange and the seam of the left lower half flange;
installing a right upper half flange and a right lower half flange, and installing the right upper half flange and the right lower half flange together through a bolt group to be tightly attached to the outer wall of the pipeline;
the left upper half flange and the right upper half flange and the left lower half flange and the right lower half flange are connected through bolt groups;
preset pretightening force is symmetrically applied to the bolt group, and compression load is formed on the sealing element.
2. The sealing method for emergency maintenance of pipelines according to claim 1, wherein the left upper half flange and the left lower half flange are vertically symmetrical, and the right upper half flange and the right lower half flange are vertically symmetrical.
3. The method of claim 1, further comprising a washer and a nut for use with the bolt, the washer being located between the bolt and the flange, the nut being mounted on the end of the bolt.
4. The sealing method for the emergency maintenance of the pipeline according to claim 1, wherein the pipeline is a pressure-bearing pipeline, the pressure of the pressure-bearing pipeline is 0-17.2 Mpa, and the temperature of the pipeline is 0-350 ℃.
5. The method of claim 1, wherein the seal is a sealing ring having an inner diameter sized to match an outer diameter of the pipe, and wherein the gap between the first extension and the pipe is the same size as the gap between the second extension and the pipe and is sized to match a thickness of the sealing ring.
6. The method of claim 1, wherein the first and second extensions are of equal length and the first and second extensions each have a length greater than the length of the seal.
7. The method of claim 1, wherein the seal is made of graphite.
8. The method of claim 1, wherein the third extension has a height dimension that matches a dimension of a gap between the first extension and the pipe, and the fourth extension has a height dimension that matches a dimension of a gap between the second extension and the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910457388.0A CN110067909B (en) | 2019-05-29 | 2019-05-29 | Sealing device and method for emergency maintenance of pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910457388.0A CN110067909B (en) | 2019-05-29 | 2019-05-29 | Sealing device and method for emergency maintenance of pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110067909A CN110067909A (en) | 2019-07-30 |
| CN110067909B true CN110067909B (en) | 2021-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910457388.0A Active CN110067909B (en) | 2019-05-29 | 2019-05-29 | Sealing device and method for emergency maintenance of pipeline |
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| CN (1) | CN110067909B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD273878A1 (en) * | 1988-07-08 | 1989-11-29 | Bkw E Weinert Deuben Veb | DEVICE FOR ELIMINATING HAVARIES ON PIPES |
| US6276726B1 (en) * | 1999-09-03 | 2001-08-21 | Ronald A. Daspit | Pipe line repair anti-corrosion electrically isolated clamp-coupling |
| US7617843B1 (en) * | 2008-09-24 | 2009-11-17 | Al-Oriar Abdulaziz K | Split sleeve clamp assembly |
| CN206112390U (en) * | 2016-08-31 | 2017-04-19 | 焦发兆 | Environment -friendly ha fujie |
| CN206369047U (en) * | 2016-12-03 | 2017-08-01 | 许川 | A kind of material filling type Pipe leakage stopper |
| CN207621569U (en) * | 2017-11-27 | 2018-07-17 | 浙江海普管业有限公司 | High sealing water pipe first-aid repairing device |
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- 2019-05-29 CN CN201910457388.0A patent/CN110067909B/en active Active
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