CN108262715B - Positioning method for installing flange bolt of hot gas guide pipe of high-temperature gas cooled reactor - Google Patents
Positioning method for installing flange bolt of hot gas guide pipe of high-temperature gas cooled reactor Download PDFInfo
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- CN108262715B CN108262715B CN201611265073.9A CN201611265073A CN108262715B CN 108262715 B CN108262715 B CN 108262715B CN 201611265073 A CN201611265073 A CN 201611265073A CN 108262715 B CN108262715 B CN 108262715B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/16—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same abutted flanges
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Abstract
The invention relates to the technical field of positioning of flange bolts of a hot gas guide pipe of a high-temperature gas cooled reactor, and particularly discloses a positioning method for mounting the flange bolts of the hot gas guide pipe of the high-temperature gas cooled reactor. The method comprises the following steps: 1. adjusting the flange surface of a hot gas guide pipe of the high-temperature gas cooled reactor; 1.1, horizontally sleeving a loop flange of a hot gas conduit shell into a shell of the hot gas conduit shell; 1.2, aligning to guide bolt holes and positioning by three guide bolts; 1.3, adjusting the positioning precision of the guide bolt by using an arc-shaped gasket; 2. assembling a main bolt; 2.1, implanting a guide positioning bolt to enable the axis of the guide positioning bolt to be vertical to the flange surface; 2.2, mounting a main bolt by using a bolt auxiliary support tool; 2.3, installing main bolts in groups, and detecting the verticality of the axes of the main bolts and the flange surface of the loop; 3. and stretching and pre-tightening the bolt. The positioning method is simple to operate, is convenient for field personnel to operate, and can ensure that the positioning method is installed in place at one time.
Description
Technical Field
The invention belongs to the technical field of positioning of flange bolts of hot gas conduits of high-temperature gas cooled reactors, and particularly relates to a positioning method for mounting the flange bolts of the hot gas conduits of the high-temperature gas cooled reactors.
Background
The high-temperature gas cooled reactor utilizes helium as a heat transfer medium, and the high-temperature helium circularly transfers heat in a primary loop. Helium with the temperature of 250 ℃ is pressurized by the main circulating fan, enters the lower part of the reactor core through an outer annular pipe of the hot gas guide pipe, flows through the reactor core from bottom to top, is heated to 700 ℃, enters the steam generator through a central annular pipe of the hot gas guide pipe, returns to the inlet of the main circulating fan after the temperature is reduced to 250 ℃ and forms a closed circulation of the helium in a primary loop.
The flange surface of the hot gas guide pipe shell is sealed by adopting a double-channel metal sealing ring, the pretightening force is exerted by 42 uniformly distributed bolts, the high-temperature gas cooled reactor is different from a common bolt flange joint form, the special structure of the high-temperature gas cooled reactor determines, and the hot gas guide pipe is required to be horizontally arranged. After the main bolt is pre-tightened, the hot gas conduit shell loop flange forms a complex nonlinear system for the bolt, the nut and the hot gas conduit shell metal sealing ring, and the technical research is not available at home at present.
Disclosure of Invention
The invention aims to provide a positioning method for mounting a flange bolt of a hot gas guide pipe of a high-temperature gas cooled reactor, which improves the mounting and positioning accuracy of a main bolt and a bolt stretcher, enables the flange sealing surface to be stressed uniformly and ensures the sealing property.
The technical scheme of the invention is as follows: a positioning method for installing flange bolts of a hot gas guide pipe of a high-temperature gas cooled reactor specifically comprises the following steps:
step 1, adjusting a flange surface of a hot gas guide pipe of a high-temperature gas cooled reactor;
step 1.1, horizontally sleeving a loop flange of a hot gas conduit shell into a shell of the hot gas conduit shell, and enabling the loop flange and the hot gas conduit shell to be positioned at the same angle;
step 1.2, aligning guide bolt holes, positioning the guide bolt holes through three guide bolts, and installing other bolts;
step 1.3, adjusting the positioning precision of the guide bolt by using the arc-shaped gasket; adjusting the axis of a bolt hole of the loose flange to be vertical to the flange surface of the loose flange by using an inner hole of the loose flange until the bolt hole with the residual vacant position is finished, and withdrawing the arc-shaped gasket after the adjustment is in place;
step 2, assembling a main bolt;
step 2.1, implanting a guide positioning bolt to enable the axis of the guide positioning bolt to be vertical to the flange surface;
2.2, mounting a main bolt by using a bolt auxiliary support tool;
step 2.3, installing main bolts in groups, and detecting the perpendicularity of the axes of the main bolts and the flange surface of the loop;
and 3, stretching and pre-tightening the bolt.
Step 2.2 in utilize bolt auxiliary stay frock, the concrete step of installation kingbolt is:
step 2.2.1, winding a protection angle at the position of a bottom bolt M90, and screwing a bolt M68 at the end part into a proper position of the threaded sleeve;
step 2.2.2, placing the main bolt at an installation position, removing the front end protective adhesive tape, and installing and adjusting the copper sleeve;
2.2.3, turning to a bolt auxiliary supporting tool, rotating to the position by using an auxiliary rotating device, removing a second section of adhesive tape, continuously screwing to the bottom of the thread, and withdrawing the rotary wrench;
and 2.2.4, detaching and adjusting the copper sleeve, the main bolt washer and the main nut to proper positions, correcting by utilizing the bolt auxiliary support, screwing the main nut, and withdrawing the bolt auxiliary support.
The concrete steps of stretching and pre-tightening the bolt in the step 3 are as follows:
fixing six bolt stretching machines and an auxiliary positioning tool, installing nylon guide sleeves on all bolts, conveying the belt mounting bolts to the main bolts of the flange of the hot gas conduit by using a gantry crane or a bearing trolley, pushing a positioning support frame of the stretching machine to the corresponding bolts, supporting the bolt stretching machines and the auxiliary tool by using the bolts, and completing the mounting and positioning of the six stretching machines; and after the stretcher finishes working, withdrawing the auxiliary tool to ensure that the stretcher is over against the next group of bolts, and repeating the steps to install the next group of stretchers. And by analogy, all the installation and positioning of the stretching machine can be completed group by group.
The specific steps of assembling and installing the main bolt in the step 2.3 are as follows:
after one main bolt is installed and positioned, taking out one guide positioning bolt to the next screw hole and fixing, fully performing the steps 2.1-2.2, and completing installation of the first group of 20 main bolts; repeating the steps, and mounting a second group of 13 main bolts by using the main bolts already mounted in place; and (4) removing the three guide bolts, repeating the installation steps, and installing 6 main bolts of the third group and 3 main bolts of the fourth group by using the main bolts which are already installed in place.
The step 2.1 of implanting a guide positioning bolt to enable the axis of the guide positioning bolt to be vertical to the flange surface comprises the following specific steps:
and implanting a guide positioning bolt in the 90-degree position direction, and adjusting the guide positioning bolt by turning into an adjusting copper sleeve at the through hole of the loop flange to ensure that the axis of the guide positioning bolt is vertical to the flange surface.
The invention has the following remarkable effects: the positioning method for installing the flange bolt of the hot gas guide pipe of the high-temperature gas cooled reactor is simple to operate, is convenient for field personnel to operate, and can ensure that the flange bolt is installed in place at one time.
Detailed Description
A positioning method for installing flange bolts of a hot gas guide pipe of a high-temperature gas cooled reactor specifically comprises the following steps:
step 1, adjusting a flange surface of a hot gas guide pipe of a high-temperature gas cooled reactor;
step 1.1, horizontally sleeving a loop flange of a hot gas conduit shell into a shell of the hot gas conduit shell, and enabling the loop flange and the hot gas conduit shell to be positioned at the same angle;
step 1.2, aligning guide bolt holes, positioning the guide bolt holes through three guide bolts, and installing other bolts;
step 1.3, adjusting the positioning precision of the guide bolt by using the arc-shaped gasket; adjusting the axis of a bolt hole of the loose flange to be vertical to the flange surface of the loose flange by using an inner hole of the loose flange until the bolt hole with the residual vacant position is finished, and withdrawing the arc-shaped gasket after the adjustment is in place;
step 2, assembling a main bolt;
step 2.1, implanting a guide positioning bolt to enable the axis of the guide positioning bolt to be vertical to the flange surface;
implanting a guide positioning bolt in the 90-degree position direction, turning into an adjusting copper sleeve at the through hole of the loop flange, and adjusting the guide positioning bolt to ensure that the axis of the guide positioning bolt is vertical to the flange surface;
2.2, mounting a main bolt by using a bolt auxiliary support tool;
step 2.2.1, winding a protection angle at the position of a bottom bolt M90, and screwing a bolt M68 at the end part into a proper position of the threaded sleeve;
step 2.2.2, placing the main bolt at an installation position, removing the front end protective adhesive tape, and installing and adjusting the copper sleeve;
2.2.3, turning to a bolt auxiliary supporting tool, rotating to the position by using an auxiliary rotating device, removing a second section of adhesive tape, continuously screwing to the bottom of the thread, and withdrawing the rotary wrench;
step 2.2.4, dismantling and adjusting the copper sleeve, the main bolt washer and the main nut to proper positions, utilizing the bolt auxiliary support for correction, screwing the main nut, and withdrawing the bolt auxiliary support;
step 2.3, installing main bolts in groups, and detecting the perpendicularity of the axes of the main bolts and the flange surface of the loop;
after one main bolt is installed and positioned, taking out one guide positioning bolt to the next screw hole and fixing, fully performing the steps 2.1-2.2, and completing installation of the first group of 20 main bolts; repeating the steps, and mounting a second group of 13 main bolts by using the main bolts already mounted in place; removing the three guide bolts, repeating the installation steps, and installing 6 main bolts of the third group and 3 main bolts of the fourth group by using the main bolts which are already installed in place;
step 3, stretching and pre-tightening the bolt
Fixing six bolt stretching machines and an auxiliary positioning tool, installing nylon guide sleeves on all bolts, conveying the belt mounting bolts to the main bolts of the flange of the hot gas conduit by using a gantry crane or a bearing trolley, pushing a positioning support frame of the stretching machine to the corresponding bolts, supporting the bolt stretching machines and the auxiliary tool by using the bolts, and completing the mounting and positioning of the six stretching machines; and after the stretcher finishes working, withdrawing the auxiliary tool to ensure that the stretcher is over against the next group of bolts, and repeating the steps to install the next group of stretchers. And by analogy, all the installation and positioning of the stretching machine can be completed group by group.
Claims (5)
1. A positioning method for installing a flange bolt of a hot gas guide pipe of a high-temperature gas cooled reactor is characterized by comprising the following steps of: the method specifically comprises the following steps:
step 1, adjusting a flange surface of a hot gas guide pipe of a high-temperature gas cooled reactor;
step 1.1, horizontally sleeving a loop flange of a hot gas conduit shell into a shell of the hot gas conduit shell, and enabling the loop flange and the hot gas conduit shell to be positioned at the same angle;
step 1.2, aligning guide bolt holes, positioning the guide bolt holes through three guide bolts, and installing other bolts;
step 1.3, adjusting the positioning precision of the guide bolt by using the arc-shaped gasket; adjusting the axis of a bolt hole of the loose flange to be vertical to the flange surface of the loose flange by using an inner hole of the loose flange until the bolt hole with the residual vacant position is finished, and withdrawing the arc-shaped gasket after the adjustment is in place;
step 2, assembling a main bolt;
step 2.1, implanting a guide positioning bolt to enable the axis of the guide positioning bolt to be vertical to the flange surface;
2.2, mounting a main bolt by using a bolt auxiliary support tool;
step 2.3, installing main bolts in groups, and detecting the perpendicularity of the axes of the main bolts and the flange surface of the loop;
and 3, stretching and pre-tightening the bolt.
2. The positioning method for installing the flange bolt of the hot gas guide pipe of the high temperature gas cooled reactor according to claim 1, wherein the positioning method comprises the following steps: step 2.2 in utilize bolt auxiliary stay frock, the concrete step of installation kingbolt is:
step 2.2.1, winding a protection angle at the position of a bottom bolt M90, and screwing a bolt M68 at the end part into a proper position of the threaded sleeve;
step 2.2.2, placing the main bolt at an installation position, removing the front end protective adhesive tape, and installing and adjusting the copper sleeve;
2.2.3, turning to a bolt auxiliary supporting tool, rotating to the position by using an auxiliary rotating device, removing a second section of adhesive tape, continuously screwing to the bottom of the thread, and withdrawing the rotary wrench;
and 2.2.4, detaching and adjusting the copper sleeve, the main bolt washer and the main nut to proper positions, correcting by utilizing the bolt auxiliary support, screwing the main nut, and withdrawing the bolt auxiliary support.
3. The positioning method for installing the flange bolt of the hot gas guide pipe of the high temperature gas cooled reactor according to claim 1, wherein the positioning method comprises the following steps: the concrete steps of stretching and pre-tightening the bolt in the step 3 are as follows:
fixing six bolt stretching machines and an auxiliary positioning tool, installing nylon guide sleeves on all bolts, conveying the belt mounting bolts to the main bolts of the flange of the hot gas conduit by using a gantry crane or a bearing trolley, pushing a positioning support frame of the stretching machine to the corresponding bolts, supporting the bolt stretching machines and the auxiliary tool by using the bolts, and completing the mounting and positioning of the six stretching machines; after the stretcher finishes working, the auxiliary tool is withdrawn, the stretcher is enabled to be opposite to the next group of bolts, and the next group of stretchers can be installed by repeating the steps; and by analogy, all the installation and positioning of the stretching machine can be completed group by group.
4. The positioning method for installing the flange bolt of the hot gas guide pipe of the high temperature gas cooled reactor according to claim 1, wherein the positioning method comprises the following steps: the specific steps of assembling and installing the main bolt in the step 2.3 are as follows:
after one main bolt is installed and positioned, taking out one guide positioning bolt to the next screw hole and fixing, repeating the step 2.1-the step 2.2, and finishing the installation of the first group of 20 main bolts; repeating the step 2.1 to the step 2.2, and installing a second group of 13 main bolts by using the main bolts which are installed in place; and (3) removing the three guide bolts, repeating the steps from 2.1 to 2.2, and installing 6 main bolts of the third group and 3 main bolts of the fourth group by using the main bolts which are already installed in place.
5. The positioning method for installing the flange bolt of the hot gas guide pipe of the high temperature gas cooled reactor according to claim 1, wherein the positioning method comprises the following steps: the step 2.1 of implanting a guide positioning bolt to enable the axis of the guide positioning bolt to be vertical to the flange surface comprises the following specific steps:
and implanting a guide positioning bolt in the 90-degree position direction, and adjusting the guide positioning bolt by turning into an adjusting copper sleeve at the through hole of the loop flange to ensure that the axis of the guide positioning bolt is vertical to the flange surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611265073.9A CN108262715B (en) | 2016-12-30 | 2016-12-30 | Positioning method for installing flange bolt of hot gas guide pipe of high-temperature gas cooled reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611265073.9A CN108262715B (en) | 2016-12-30 | 2016-12-30 | Positioning method for installing flange bolt of hot gas guide pipe of high-temperature gas cooled reactor |
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| Publication Number | Publication Date |
|---|---|
| CN108262715A CN108262715A (en) | 2018-07-10 |
| CN108262715B true CN108262715B (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611265073.9A Active CN108262715B (en) | 2016-12-30 | 2016-12-30 | Positioning method for installing flange bolt of hot gas guide pipe of high-temperature gas cooled reactor |
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| CN108673417B (en) * | 2018-07-03 | 2023-09-08 | 三门核电有限公司 | Dismounting tool and dismounting method for main bolt of shielding main pump |
Citations (5)
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|---|---|---|---|---|
| US5560091A (en) * | 1994-05-26 | 1996-10-01 | Labit, Jr.; Sexon J. | Apparatus for aligning pipe flanges |
| WO2002086372A1 (en) * | 2001-04-24 | 2002-10-31 | Future Alignments Limited | Apparatus for spreading flanges of pipes________________________ |
| CN205104247U (en) * | 2015-11-03 | 2016-03-23 | 大亚湾核电运营管理有限责任公司 | Nuclear power station reactor radioactivity fission product processing apparatus |
| CN205342993U (en) * | 2015-12-28 | 2016-06-29 | 国家电网公司 | Flange counterpoint micromatic setting and flange are counterpointed and are finely tuned external member |
| EP3068584A1 (en) * | 2013-11-14 | 2016-09-21 | Steven Leary | Improved apparatuses and methods for insertion of gaskets |
-
2016
- 2016-12-30 CN CN201611265073.9A patent/CN108262715B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560091A (en) * | 1994-05-26 | 1996-10-01 | Labit, Jr.; Sexon J. | Apparatus for aligning pipe flanges |
| WO2002086372A1 (en) * | 2001-04-24 | 2002-10-31 | Future Alignments Limited | Apparatus for spreading flanges of pipes________________________ |
| EP3068584A1 (en) * | 2013-11-14 | 2016-09-21 | Steven Leary | Improved apparatuses and methods for insertion of gaskets |
| CN205104247U (en) * | 2015-11-03 | 2016-03-23 | 大亚湾核电运营管理有限责任公司 | Nuclear power station reactor radioactivity fission product processing apparatus |
| CN205342993U (en) * | 2015-12-28 | 2016-06-29 | 国家电网公司 | Flange counterpoint micromatic setting and flange are counterpointed and are finely tuned external member |
Non-Patent Citations (1)
| Title |
|---|
| 螺栓法兰接头安全密封技术;蔡仁良等;《化工设备与管道》;20120630;第49卷(第3期);全文 * |
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