CN111331552A - Special tool and method for disassembling and assembling mechanical seal movable ring assembly - Google Patents
Special tool and method for disassembling and assembling mechanical seal movable ring assembly Download PDFInfo
- Publication number
- CN111331552A CN111331552A CN202010250958.1A CN202010250958A CN111331552A CN 111331552 A CN111331552 A CN 111331552A CN 202010250958 A CN202010250958 A CN 202010250958A CN 111331552 A CN111331552 A CN 111331552A
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- flange
- annular flange
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- ring
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 14
- 239000010439 graphite Substances 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 10
- 230000000149 penetrating effect Effects 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
The invention belongs to the field of maintenance of containment gates of nuclear power stations, and particularly relates to a special tool and a method for disassembling and assembling a mechanical seal moving ring assembly. According to the invention, the uniform stress of the movable ring is ensured by measuring the distance between the annular flange and the base flange and adjusting the pretightening force of the four hexagonal flange nuts, the movable ring and the positioning ring can be effectively prevented from being jammed in the disassembling and assembling processes, the operation is convenient, the working efficiency is greatly improved, the safety risk of equipment is greatly reduced, and the smooth development of the maintenance work of a gate is ensured.
Description
Technical Field
The invention belongs to the field of maintenance of containment gates of nuclear power stations, and particularly relates to a special tool and a special method for disassembling and assembling a mechanical seal movable ring assembly.
Background
The personnel lock is one of important barriers for ensuring the containment tightness and is also an important passage for personnel to enter and exit the reactor building. The mechanical part of the personnel gate mainly comprises embedded parts, a cylinder body, a door plate and a transmission mechanism, and the opening and closing and interlocking functions of the inner door and the outer door are mainly realized through a set of gear distribution mechanism. Four mechanical penetration pieces are respectively arranged on the gate cylinder body: the inner door hand wheel penetrating piece, the outer door hand wheel penetrating piece, the inner door sealing locking shaft penetrating piece and the inner door plate transmission shaft penetrating piece have the main functions that the rotating power of the hand wheel outside the barrel body is transmitted into a distribution mechanism in the barrel body, or the rotating power output by the distribution mechanism in the barrel body is transmitted to a door opening and closing mechanism and a sealing mechanism outside the barrel body, and meanwhile, the sealing performance of the penetrating position is guaranteed.
According to the requirement of an operating manual of the personnel gate, two O-shaped sealing rings in the movable ring component of the mechanical penetrating piece of the personnel gate are replaced at least once every four years. The movable ring assembly needs to be disassembled before the sealing ring is replaced, and the clamp spring is not easy to disassemble and assemble due to the fact that the spring elasticity behind the movable ring is large. The movable ring can not be completed on the overhaul site when being disassembled, the movable ring assembly needs to be fixed on the bench clamp, then the movable ring is pulled by the puller to compress the spring, and finally the clamp spring is taken out by the clamp spring clamp. When the puller compression spring is used, the movable ring is blocked and cannot rebound easily due to uneven stress. The hard graphite ring embedded on the moving ring is a key part for ensuring the sealing performance of the mechanical penetrating piece, the penetrating piece loses the use value once being damaged, and the hard graphite ring is very fragile, and the snap spring can be easily broken when being disassembled and assembled without protection.
Therefore, a special tool for disassembling and assembling the mechanical seal moving ring assembly is required to be developed, the moving ring assembly of the mechanical penetrating piece of the personnel gate is conveniently disassembled and assembled, the hard graphite seal ring on the moving ring is protected from being damaged, and the defects of the prior art are overcome.
Disclosure of Invention
The invention aims to provide a special tool and a method for disassembling and assembling a mechanical seal movable ring assembly aiming at the defects of the prior art, and when an O-shaped sealing ring of the movable ring assembly of a mechanical penetrating piece of a personnel gate is replaced, the special tool is used for realizing the safe and convenient disassembly and assembly of the mechanical seal movable ring assembly so as to ensure that the maintenance work of the personnel gate is smoothly carried out during the overhaul of a unit.
The technical scheme of the invention is as follows:
the utility model provides a mechanical seal rotating ring subassembly disintegration and equipment specialized tool, this specialized tool includes base flange, pull rod, hexagonal flange nut, ring flange, base flange locating hole, base flange screw hole, ring flange through-hole and ring flange centre bore, and the design has base flange locating hole and base flange screw hole on the base flange, and the design has ring flange through-hole and ring flange centre bore on the ring flange, pull rod one end and base flange, the pull rod other end and ring flange connection.
The pull rod penetrates through the through hole of the annular flange and is fixedly connected with the annular flange through a hexagonal flange nut.
Four base flange threaded holes are uniformly distributed on the periphery of the base flange.
The base flange positioning hole is positioned in the center of the base flange.
And threads are distributed at two ends of the pull rod, one end of the pull rod is connected with a threaded hole of the base flange, and the other end of the pull rod is connected with a hexagonal flange nut.
Four annular flange through holes are uniformly distributed on the periphery of the annular flange.
The central hole of the annular flange is positioned in the center of the annular flange.
The disassembly and assembly method of the mechanical seal moving ring assembly specifically comprises the following steps:
step (1) coating a layer of lubricating grease on the threads, horizontally placing a base flange on a workbench, screwing four pull rods onto the base flange, screwing the pull rods to the bottom and then turning the pull rods for a half circle, placing a movable ring assembly to be disassembled on the base flange, placing a transmission shaft in a positioning hole of the base flange, enabling a hard graphite sealing ring to face upwards, installing an annular flange, aligning the center of the annular flange with the center of the movable ring, installing four hexagonal flange nuts onto the pull rods, cross screwing the four hexagonal flange nuts, enabling the annular flange to uniformly press the movable ring, exposing a clamp spring groove of the movable ring assembly, measuring the distance between the annular flange and the base flange, adjusting the pretightening force of the four hexagonal flange nuts according to the measurement result, finally ensuring that the distance deviation of the flanges at the four pull rods is kept within 0.5mm, taking out a clamp spring by using clamp spring pliers, uniformly unscrewing the four hexagonal flange nuts, taking off the annular flange, taking down the positioning ring and the moving ring on the moving ring assembly, and replacing the O-shaped sealing ring in the moving ring;
step (2) the movable ring and the positioning ring are installed back in sequence, the movable ring assembly is placed on the base flange, the transmission shaft is placed in the positioning hole of the base flange, the hard graphite sealing ring is upward, the annular flange is arranged, the center of the annular flange is aligned with the center of the movable ring, the four hexagonal flange nuts are arranged on the pull rod, the four hexagonal flange nuts are alternately screwed, the movable ring is uniformly pressed by the annular flange, the clamp spring groove of the movable ring component is exposed, the distance between the annular flange and the base flange is measured at four pull rod positions in the tightening process, the pretightening force of four hexagonal flange nuts is adjusted according to the measuring result, the distance deviation of the flanges at the four pull rods is finally guaranteed to be kept within 0.5mm, the snap spring is installed by using the snap spring clamp, the four hexagonal flange nuts are evenly unscrewed after the installation is completed, the annular flange is taken down, and the movable ring assembly is taken out of the base flange and is reloaded onto equipment.
The invention has the following beneficial effects:
the special tool provided by the invention has no special requirements on working site conditions, is convenient to operate, and is used for disassembling and assembling the mechanical penetrating piece movable ring assembly during the maintenance of the nuclear power station personnel gate, so that the links of conveying the movable ring assembly to a machining workshop, fixing by using bench clamps and disassembling by pulling are saved, and the working efficiency is greatly improved.
When the special tool is used for compressing the spring, the distance between the annular flange and the base flange and the pretightening force for adjusting the four hexagonal flange nuts can be measured by the aid of the pretightening force, so that the dynamic ring is uniformly stressed, and the dynamic ring and the positioning ring can be effectively prevented from being jammed in disassembly and assembly processes.
According to the size of the key shaft of the movable ring assembly, the positioning hole is designed on the base flange, so that the movable ring is kept at the central position when pretightening force is applied to the spring through the pull rod, and the movable ring assembly is effectively prevented from moving in the disassembling and assembling processes.
According to the actual structure of rotating ring subassembly, ingenious use the ring flange, the spring is effectively compressed under the combined action of four pull rods, makes the jump ring no longer receive spring pressure, and relative position is favorable to taking out and installing the jump ring more, has solved the problem of rotating ring subassembly disintegration in-process jump ring dismouting difficulty.
Borrow for reference the static seal structure that the ring compressed tightly the hard graphite circle of rotating ring of mechanical through-going part, the design pushes down hard graphite ring with ring flange, has effectively protected the safety of hard graphite sealing ring, has not taken place the condition that the hard graphite sealing ring of rotating ring subassembly disintegration in-process damaged after using this specialized tool, greatly reduced the equipment safety risk in this work, develop smoothly for personnel's gate maintenance work and provide the guarantee.
Drawings
FIG. 1 is a schematic structural view of a special tool for disassembling and assembling a mechanical seal moving ring component designed by the invention;
FIG. 2 is a schematic structural view of a base flange in a special tool for disassembling and assembling a mechanical seal moving ring component designed by the invention;
FIG. 3 is a schematic structural view of an annular flange in a special tool for disassembling and assembling a mechanical seal moving ring component designed by the invention;
FIG. 4 is an assembly drawing of a special tool for disassembling and assembling the mechanical seal rotating ring component designed by the invention;
wherein: 1-base flange, 2-pull rod, 3-hexagonal flange nut, 4-annular flange, 5-base flange positioning hole, 6-base flange threaded hole, 7-annular flange through hole, 8-annular flange central hole, 9-transmission shaft, 10-movable ring, 12-spring, 13-pin, 14-sealing ring, 15-positioning ring, 16-hard graphite ring, 17-snap spring
Detailed Description
The present technology is further described below:
as shown in fig. 1, 2 and 3, the invention provides a special tool for disassembling and assembling a mechanical seal moving ring assembly, which comprises a base flange 1, a pull rod 2, a hexagonal flange nut 3, an annular flange 4, a base flange positioning hole 5, a base flange threaded hole 6, an annular flange through hole 7 and an annular flange central hole 8, wherein the base flange 1 is provided with the base flange positioning hole 5 and the base flange threaded hole 6, the annular flange 4 is provided with the annular flange through hole 7 and the annular flange central hole 8, the base flange 1 is in threaded connection with the pull rod 2, and the pull rod 2 penetrates through the annular flange through hole 7 to be fixedly connected with the hexagonal flange nut 3.
Four base flange threaded holes 6 are uniformly distributed on the periphery of the base flange 1 and used for connecting and fixing the pull rod 2, and the pulling force of the pull rod 2 is transmitted to the base flange 1 through threads.
The base flange positioning hole 5 is positioned in the center of the base flange 1 and plays a positioning role.
Threads are distributed at two ends of the pull rod 2, one end of the pull rod is connected with a threaded hole 6 of the base flange, and the other end of the pull rod penetrates through a through hole 7 of the annular flange to be connected with the hexagonal flange nut 3.
Four annular flange through holes 7 are uniformly distributed around the annular flange 4.
The annular flange central hole 8 is located in the center of the annular flange 4.
As shown in fig. 4, when the tool is used for disassembling and assembling the mechanical seal moving ring assembly, when four hexagonal flange nuts 3 are uniformly screwed, the annular flange 4 generates pressure to push the moving ring 10 and compress the spring 11, so that the clamp spring 16 is in a free state, and the disassembly and assembly are convenient, and meanwhile, the annular flange 4 covers two hard graphite seal rings 15 to protect the hard graphite seal rings from being damaged. The main function of the base flange 1 is to bear the pulling force from the pull rod 2 and the reaction force of the transmission shaft 9, and the positioning hole 5 of the base flange can position and keep the transmission shaft 9 of the moving ring component at the center. The hexagonal flange nuts 3 are four in number, and the uniform and symmetrical tightening enables the annular flange 4 to generate pressure on the movable ring 10 to compress the spring. The function of the annular flange 4 is to push the moving ring 10 to compress the spring 11 under the action of the pull rod 2 and the hexagonal flange nut 3, and simultaneously protect the hard graphite sealing ring 15 from being damaged.
The invention also provides a disassembly and assembly method of the mechanical seal moving ring assembly, which comprises the following steps:
checking whether threads of all parts of a tool are intact, coating a layer of lubricating grease on the threads to prevent the threads from being seized, arranging a positioning hole upwards, horizontally placing a base flange 1 on a workbench, screwing four pull rods 2 onto the base flange 1, screwing the pull rods to the bottom and then circling for a half circle, placing a moving ring assembly needing to be disassembled on the base flange 1, arranging a transmission shaft 9 in a positioning hole 5 of the base flange, arranging an annular flange 4 with a hard graphite sealing ring upwards, aligning the center of the annular flange 4 with the center of a moving ring 10, arranging four hexagonal flange nuts 3 onto the pull rods 2, screwing four hexagonal flange nuts 3 in a crossed manner, enabling the annular flange to uniformly compress the moving ring and expose a clamp spring groove of the moving ring assembly, measuring the distance between the annular flange 4 and the base flange 1 at the positions of the four pull rods 2 in the screwing process, and adjusting the pre-tightening force of the four hexagonal flange nuts 3 according to the measuring result, finally, the distance deviation of the flanges at the four pull rods 2 is kept within 0.5mm, the snap spring 17 is taken out by using snap spring pliers, the four hexagonal flange nuts 3 are unscrewed uniformly, the annular flange 4 is taken down, the positioning ring 15 and the moving ring 10 on the moving ring assembly are taken down, and the O-shaped sealing ring 14 in the moving ring 10 is replaced;
step (2) the moving ring 10 and the positioning ring 15 are installed back in sequence, the moving ring assembly is placed on the base flange 1, the transmission shaft 9 is placed in the positioning hole 5 of the base flange, the hard graphite sealing ring faces upwards, the annular flange 4 is arranged, the center of the annular flange 4 is aligned with the center of the movable ring 10, the four hexagonal flange nuts 3 are arranged on the pull rod 2, the four hexagonal flange nuts 3 are alternately screwed, the movable ring is uniformly pressed by the annular flange 4, the clamp spring groove of the movable ring component is exposed, the distance between the annular flange 4 and the base flange 1 is measured at the four tie rods 2 during the tightening process, adjusting the pretightening force of four hexagonal flange nuts 3 according to the measuring result, finally guaranteeing that the flange distance deviation of four pull rods is kept within 0.5mm, using a clamp spring clamp to install a clamp spring, evenly unscrewing four hexagonal flange nuts 3 after the installation is finished, taking down an annular flange 4, and taking out a movable ring assembly from a base flange 1 and reloading the movable ring assembly to equipment.
This specialized tool simple structure, convenient operation, from the design preparation, successfully use in the maintenance of personnel's gate process of the past, effectively improved the efficiency that the work was changed to the rotating ring subassembly O type circle to protect the safety of hard graphite sealing ring, reduced the equipment safety risk in this work, carried out the guarantee smoothly for personnel's gate maintenance work.
The project can be popularized and applied in the related work of the same type of units.
The mechanical seal movable ring component disassembly and assembly special tool designed and manufactured by the project can be popularized to mechanical seal maintenance of other similar structures of a power station. The project has good reference significance for the maintenance of other similar structure equipment in the same industry.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (8)
1. The utility model provides a mechanical seal rotating ring subassembly disintegration and equipment specialized tool which characterized in that: the special tool comprises a base flange (1), a pull rod (2), a hexagonal flange nut (3), an annular flange (4), a base flange positioning hole (5), a base flange threaded hole (6), an annular flange through hole (7) and an annular flange central hole (8), wherein the base flange positioning hole (5) and the base flange threaded hole (6) are designed on the base flange (1), the annular flange through hole (7) and the annular flange central hole (8) are designed on the annular flange (4), one end of the pull rod (2) is connected with the base flange (1), and the other end of the pull rod (2) is connected with the annular flange (4).
2. The special tool for disassembling and assembling the mechanical seal moving ring component according to claim 1, wherein: the pull rod (2) penetrates through the annular flange through hole (7) and is fixedly connected with the annular flange (4) through the hexagonal flange nut (3).
3. The special tool for disassembling and assembling the mechanical seal moving ring assembly according to claim 2, wherein: four base flange threaded holes (6) are uniformly distributed on the periphery of the base flange (1).
4. The special tool for disassembling and assembling the mechanical seal moving ring assembly according to claim 3, wherein: the base flange positioning hole (5) is positioned in the center of the base flange (1).
5. The special tool for disassembling and assembling the mechanical seal moving ring assembly according to claim 4, wherein: the two ends of the pull rod (2) are distributed with threads, one end of the pull rod is connected with a base flange threaded hole (6), and the other end of the pull rod is connected with a hexagonal flange nut (3).
6. The special tool for disassembling and assembling the mechanical seal moving ring assembly according to claim 5, wherein: four annular flange through holes (7) are uniformly distributed on the periphery of the annular flange (4).
7. The special tool for disassembling and assembling the mechanical seal moving ring assembly according to claim 6, wherein: the central hole (8) of the annular flange is positioned in the center of the annular flange (4).
8. The method for disassembling and assembling a mechanical seal moving ring assembly according to any one of claims 1 to 7, characterized in that it comprises in particular the steps of:
step (1) coating a layer of lubricating grease on threads, horizontally placing a base flange (1) on a workbench, screwing four pull rods (2) on the base flange (1), screwing the pull rods to the base flange (1), turning the pull rods to a half circle after screwing to the bottom, placing a movable ring assembly needing to be disassembled on the base flange (1), placing a transmission shaft (9) in a base flange positioning hole (5), enabling a hard graphite sealing ring to face upwards, installing an annular flange (4), enabling the center of the annular flange (4) to be aligned with the center of a movable ring (10), installing four hexagonal flange nuts (3) on the pull rods (2), cross-screwing the four hexagonal flange nuts (3), enabling the annular flange to uniformly compress the movable ring, exposing a clamp spring groove of the movable ring assembly, measuring the distance between the annular flange (4) and the base flange (1), adjusting the pre-tightening force of the four hexagonal flange nuts (3) according to the measurement result, and finally ensuring that the flange distance deviation at the four pull rods (2) is kept within 0.5mm, taking out the clamp spring (17) by using clamp spring pliers, uniformly unscrewing four hexagonal flange nuts (3), taking down the annular flange (4), taking down the positioning ring (15) and the moving ring (10) on the moving ring assembly, and replacing the O-shaped sealing ring (14) in the moving ring (10);
step (2) a moving ring (10) and a positioning ring (15) are sequentially installed in a returning mode, a moving ring assembly is placed on a base flange (1), a transmission shaft (9) is placed in a base flange positioning hole (5), a hard graphite sealing ring faces upwards, an annular flange (4) is installed, the center of the annular flange (4) is aligned with the center of the moving ring (10), four hexagonal flange nuts (3) are installed on pull rods (2), the four hexagonal flange nuts (3) are crossly screwed, the moving ring is uniformly pressed by the annular flange (4), a clamp spring groove of the moving ring assembly is exposed, the distance between the annular flange (4) and the base flange (1) is measured at the positions of the four pull rods (2) in the screwing process, the pre-tightening force of the four flange nuts (3) is adjusted according to the measurement result, the flange distance deviation at the positions of the four pull rods is finally guaranteed to be kept within 0.5mm, and a clamp spring is installed by using clamp spring clamps, evenly unscrew four hexagonal flange nuts (3) after the installation, take off annular flange (4), take out and repack the rotating ring subassembly to equipment from base flange (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010250958.1A CN111331552B (en) | 2020-04-01 | 2020-04-01 | Special tool and method for disassembling and assembling mechanical seal moving ring assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010250958.1A CN111331552B (en) | 2020-04-01 | 2020-04-01 | Special tool and method for disassembling and assembling mechanical seal moving ring assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111331552A true CN111331552A (en) | 2020-06-26 |
| CN111331552B CN111331552B (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010250958.1A Active CN111331552B (en) | 2020-04-01 | 2020-04-01 | Special tool and method for disassembling and assembling mechanical seal moving ring assembly |
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| Country | Link |
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| CN (1) | CN111331552B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112589723A (en) * | 2020-12-10 | 2021-04-02 | 福建福清核电有限公司 | Assembly tool and method for box-packed mechanical seal |
| CN116423194A (en) * | 2022-12-23 | 2023-07-14 | 广东北田智能科技有限公司 | Automatic assembly device is used in gas-liquid separator production |
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| Publication number | Publication date |
|---|---|
| CN111331552B (en) | 2024-04-09 |
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