CN109000082B - Clamp for generator flange hydrogen leakage under-pressure plugging and plugging method - Google Patents
Clamp for generator flange hydrogen leakage under-pressure plugging and plugging method Download PDFInfo
- Publication number
- CN109000082B CN109000082B CN201811009828.8A CN201811009828A CN109000082B CN 109000082 B CN109000082 B CN 109000082B CN 201811009828 A CN201811009828 A CN 201811009828A CN 109000082 B CN109000082 B CN 109000082B
- Authority
- CN
- China
- Prior art keywords
- clamp
- flange
- plugging
- end plate
- bolt
- Prior art date
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 18
- 239000001257 hydrogen Substances 0.000 title claims abstract description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000003292 glue Substances 0.000 claims abstract description 12
- 239000000565 sealant Substances 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002431 hydrogen Chemical group 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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
- 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
Abstract
The invention belongs to the technical field of mechanical assembly, and particularly relates to a clamp and a plugging method for hydrogen leakage under pressure of a generator flange. In the invention, the first clamp and the second clamp are tightly buckled together, and the first clamp and the second clamp are of the same symmetrical structure; the first clamp comprises an ear plate, an end plate and a shell, wherein the shell is in a semi-cylindrical shape, a glue injection hole is formed in the center of the cylinder, the end plate is welded at one end of the cylinder, two through holes which are symmetrical in center are formed in the end plate, and the symmetrical ear plates are welded on the outer walls of the end plate and the shell. The method comprises the following steps: step 1, replacing bolts of a flange with long screws; step 2, fixing a clamp; step 3, dismantling bolts and mounting fixtures in field implementation; step 4, coating sealant on the surface of the bolt and the clamp; step 5, installing a clamp lug plate bolt; and 6, plugging the leakage points. The clamp disclosed by the invention is simple and reliable in structure, simple and quick to use and capable of realizing the pressurized plugging of the hydrogen leakage of the generator.
Description
Technical Field
The invention belongs to the technical field of mechanical assembly, and particularly relates to a clamp and a plugging method for hydrogen leakage under pressure of a generator flange.
Background
In Tian Wan nuclear power station, two WWER-1000 nuclear power units of one-term engineering adopt Russian supply type-3 TVB-1000-2, which is a hydrogen cooling unit. After the T206 of the Tian Wan nuclear power station is overhauled, the hydrogen pipeline flange of the generator leaks hydrogen. The leakage position is quite special and is positioned at the joint of the flange and the generator bottom body, as shown in figure 1;
the leakage point is characterized in that firstly, a leakage medium is hydrogen, the leakage amount is large, the high explosion risk is achieved, and another more important reason is that a common flange clamp is not suitable for the working condition, a straight pipe clamp cannot be used for fixing, and the leakage point is easy to generate movement in the glue injection process and cannot realize sealing. When other similar structures of the medium leak, the clamp can be connected with the equipment body by adopting a welding method, so that the problem of the movement of the clamp is solved, but the leaked medium is hydrogen and cannot be treated by adopting the welding method, so that the clamp can be fixed without moving fire, and a complete pressurized plugging scheme for sealing the cavity is formed.
Disclosure of Invention
The invention solves the technical problems that: the invention provides a clamp and a plugging method for plugging a generator flange hydrogen leakage under pressure, which have the advantages of simple and reliable structure, simple and quick use and capability of realizing the plugging of the generator hydrogen leakage under pressure.
The invention adopts the technical scheme that:
a clamp for leakage blocking of a generator flange under pressure comprises a clamp I and a clamp II, wherein the clamp I and the clamp II are tightly buckled together, and the clamp I and the clamp II are of the same symmetrical structure; the first clamp comprises an ear plate, an end plate and a shell, wherein the shell is in a semi-cylindrical shape, a glue injection hole is formed in the center of the cylinder, the end plate is welded at one end of the cylinder, two through holes which are symmetrical in center are formed in the end plate, and the symmetrical ear plates are welded on the outer walls of the end plate and the shell.
A method for plugging a generator flange with hydrogen leakage under pressure comprises the following steps:
step 1, removing one bolt of a leakage flange, namely replacing an original fastening bolt of the flange with a long screw rod, fastening the flange by using a back cap, and replacing the bolt of the flange with the long screw rod in sequence;
step 2, combining the clamp I and the clamp II into a complete clamp, enabling the opposite side of the end plate to be close to the generator, enabling the long screw rod to pass through the clamp through hole, and fastening the outer side of the end plate of the clamp by using a nut to realize the fixation of the clamp;
step 3, a copper wrench is used in the process of removing the bolts and installing the clamp in site implementation;
step 4, coating sealant on all the surfaces possibly contacted with the bolts and the clamp to prevent sparks from being generated by collision;
step 5, installing a clamp lug plate bolt, enabling the bolt to penetrate through the lug plate, installing a nut, fastening the clamp I and the clamp II, and limiting the radial freedom degree of the clamp by utilizing the designed lug plate bolt of the clamp;
and 6, sealing and injecting glue to the clamp after the clamp is installed, and plugging leakage points.
The invention has the beneficial effects that:
according to the clamp provided by the invention, the radial freedom degree of the clamp is limited by using the designed clamp lug plate bolt; the original fastening bolt of the flange is replaced by the long screw rod, the flange is fastened by the back cap, then the long screw rod passes through the clamp, and the clamp is fastened at one end of the clamp by the nut, so that the clamp is fixed. The long screw rod is used for limiting the clamp along the axial direction of the pipeline, so that the clamp cannot move in the glue injection process; and (3) smearing sealant on all the surfaces possibly contacted with the bolt and the clamp, so as to prevent the clamp from being knocked by metal to generate sparks and prevent hydrogen explosion.
Drawings
FIG. 1 is a schematic view of a prior art leak location structure;
FIG. 2 is a schematic diagram of a fixture for plugging a generator flange under pressure;
FIG. 3 is a cross-sectional view of a clamp;
in the figure: 1-clamp I, 2-clamp II, 3-through hole, 4-injecting glue hole, 5-otic placode, 6-end plate, 7-casing.
Detailed Description
The invention provides a clamp for plugging a generator flange under pressure and a plugging method, which are further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 2, the clamp for the hydrogen leakage and pressurized plugging of the generator flange provided by the invention comprises a clamp I1 and a clamp II 2, wherein the clamp I1 and the clamp II 2 are tightly buckled together, the clamp I1 and the clamp II 2 have the same symmetrical structure, the clamp I1 is taken as an example, as shown in fig. 3, the clamp I1 comprises an ear plate 5, an end plate 6 and a shell 7, the shell 7 is in a semi-cylindrical shape, a glue injection hole 4 is formed in the middle of the cylinder, an end plate 6 is welded at one end of the cylinder, two through holes 3 which are symmetrical in the center are formed in the end plate 6, and symmetrical ear plates 5 are welded on the outer walls of the end plate 6 and the shell 7.
According to the structural feature at leakage position, the bolt of flange joint body is single head bolt, totally four, and one end threaded connection is in generator body shell, through changing the original fastening bolt of flange into long screw rod, uses the back to push up earlier with the flange fastening, changes the flange bolt into long screw rod in proper order after, passes anchor clamps through-hole 3 with long screw rod again, utilizes the nut fastening at anchor clamps one end just so to realize the fixed of anchor clamps. When the method is implemented on site, a copper wrench is used in the process of dismantling the bolts and the mounting fixtures, and sealant is smeared on all the surfaces possibly contacted with the bolts and the fixtures, so that sparks are prevented from being generated by collision. The long screw rod is used for limiting the clamp along the axial direction of the pipeline, so that the clamp cannot move in the glue injection process. The radial freedom degree of the clamp is limited by the lug plate bolts of the designed clamp, and sealing glue injection is carried out on the clamp after the clamp is successfully installed, so that leakage point plugging is completed.
The invention provides a method for plugging a generator flange with hydrogen under pressure, which comprises the following steps:
step 1, removing one bolt of the leakage flange in the step 1, namely replacing the original fastening bolt of the flange with a long screw rod, fastening the flange by using a back cap, and replacing the bolts of the flange with the long screw rod in sequence;
step 2, as shown in a figure II, combining the clamp I1 and the clamp II 2 into a complete clamp, enabling the opposite sides of the end plate 6 to be close to the generator, enabling a long screw rod to pass through the clamp through hole 3, and fastening the outer side of the end plate 6 of the clamp by using a nut to realize the fixation of the clamp;
step 3, a copper wrench is used in the process of removing the bolts and installing the clamp in site implementation;
step 4, coating sealant on all the surfaces possibly contacted with the bolts and the clamp to prevent sparks from being generated by collision;
step 5, installing a clamp lug plate bolt, enabling the bolt to penetrate through the lug plate 5, installing a nut, fastening the clamp I and the clamp II, and limiting the radial freedom degree of the clamp by utilizing the designed lug plate bolt of the clamp;
and 6, sealing and injecting glue to the clamp after the clamp is installed, and plugging leakage points.
Claims (1)
1. The method for plugging the generator flange hydrogen leakage under pressure is based on a clamp for plugging the generator flange hydrogen leakage under pressure, and comprises a clamp I (1) and a clamp II (2), wherein the clamp I (1) and the clamp II (2) are tightly buckled together, and the clamp I (1) and the clamp II (2) are of the same symmetrical structure; clamp one (1) includes otic placode (5), end plate (6), casing (7), and casing (7) are half cylinder shape, and the drum centre is opened has injecting glue hole (4), and one end welding has end plate (6), and it has two through-holes (3) of centrosymmetric to open on end plate (6), and the outer wall welding of end plate (6) and casing (7) has otic placode (5) of symmetry, its characterized in that: the method comprises the following steps:
step (1), removing one bolt of the leakage flange, namely replacing the original fastening bolt of the flange with a long screw rod, fastening the flange by using a back cap, and replacing the bolt of the flange with the long screw rod in sequence;
combining the first clamp (1) and the second clamp (2) into a complete clamp, enabling the opposite side of the end plate (6) to be close to the generator, enabling a long screw rod to pass through the clamp through hole (3), and fastening the outer side of the end plate (6) of the clamp by using a nut to fix the clamp;
step (3), a copper wrench is used in the process of dismantling the bolt and installing the clamp in site implementation;
step (4), coating sealant on all surfaces possibly contacted with the bolts and the clamp to prevent sparks from being generated by collision;
step (5), installing clamp lug plate bolts, enabling the bolts to penetrate through the lug plates (5), installing nuts, fastening the clamp I (1) and the clamp II (2), and limiting radial freedom of the clamp by utilizing the designed lug plate bolts of the clamp;
and (6) after the clamp is installed, sealing and injecting glue to the clamp, and plugging leakage points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811009828.8A CN109000082B (en) | 2018-08-31 | 2018-08-31 | Clamp for generator flange hydrogen leakage under-pressure plugging and plugging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811009828.8A CN109000082B (en) | 2018-08-31 | 2018-08-31 | Clamp for generator flange hydrogen leakage under-pressure plugging and plugging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109000082A CN109000082A (en) | 2018-12-14 |
| CN109000082B true CN109000082B (en) | 2024-01-12 |
Family
ID=64590601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811009828.8A Active CN109000082B (en) | 2018-08-31 | 2018-08-31 | Clamp for generator flange hydrogen leakage under-pressure plugging and plugging method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109000082B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201779401U (en) * | 2010-07-22 | 2011-03-30 | 中国石油天然气股份有限公司 | Fully wrapping type flange leak-stopping clamp |
| CN102226492A (en) * | 2011-05-24 | 2011-10-26 | 天津大学 | Flange clamp used for bolt corrosion and line sealing |
| CN204328331U (en) * | 2014-12-04 | 2015-05-13 | 重庆建峰化工股份有限公司 | A kind of high pressure flange seal clamp |
| CN209245569U (en) * | 2018-08-31 | 2019-08-13 | 江苏核电有限公司 | One kind leaking hydrogen pressure sealing fixture for generator flange |
-
2018
- 2018-08-31 CN CN201811009828.8A patent/CN109000082B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201779401U (en) * | 2010-07-22 | 2011-03-30 | 中国石油天然气股份有限公司 | Fully wrapping type flange leak-stopping clamp |
| CN102226492A (en) * | 2011-05-24 | 2011-10-26 | 天津大学 | Flange clamp used for bolt corrosion and line sealing |
| CN204328331U (en) * | 2014-12-04 | 2015-05-13 | 重庆建峰化工股份有限公司 | A kind of high pressure flange seal clamp |
| CN209245569U (en) * | 2018-08-31 | 2019-08-13 | 江苏核电有限公司 | One kind leaking hydrogen pressure sealing fixture for generator flange |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109000082A (en) | 2018-12-14 |
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