CN216815899U - Mechanical seal tightness test device for rotary equipment of nuclear power plant - Google Patents
Mechanical seal tightness test device for rotary equipment of nuclear power plant Download PDFInfo
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- CN216815899U CN216815899U CN202123117704.1U CN202123117704U CN216815899U CN 216815899 U CN216815899 U CN 216815899U CN 202123117704 U CN202123117704 U CN 202123117704U CN 216815899 U CN216815899 U CN 216815899U
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Abstract
The utility model belongs to the technical field of maintenance of nuclear power plants, and particularly relates to a mechanical seal tightness test device for rotary equipment of a nuclear power plant. The sealing test device comprises a pressurizing pump, an inlet pipeline, an outlet pipeline, a sealing test shell and a mechanical sealing assembly, wherein a through hole is formed in the middle of an outer cylinder of the sealing test shell, the inlet pipeline is inserted into the through hole, the pressurizing pump is communicated with the interior of the sealing test shell through the inlet pipeline, a through hole is formed in the bottom of the outer cylinder of the sealing test shell, and the outlet pipeline is inserted into the through hole and communicated with the interior of the sealing test shell; the mechanical seal assembly is inserted from the top of the seal test housing. The device can meet the requirements of the test equipment, the test medium, the test pressure, the test temperature, the test time, the test method, the acceptance standard of the test result and the like of the mechanical seal tightness test of the rotating equipment in the nuclear power plant.
Description
Technical Field
The utility model belongs to the technical field of maintenance of nuclear power plants, and particularly relates to a mechanical seal tightness test device for rotary equipment of a nuclear power plant.
Background
The mechanical seal is an important shaft seal device of rotating equipment and has quite wide application in a nuclear power plant. Taking a water pump as an example, one million kilowatt pressurized water reactor nuclear power station has about 257 pumps and about 840 pumps, and the total investment accounts for about 20% of the total investment of equipment of the nuclear power station. The main pump, the charging pump, the waste heat discharge pump, the safe spray pump, the low-pressure safety injection pump, the equipment cooling water pump, the electric auxiliary water feed pump, the spent fuel pool cooling pump of the nuclear island of the nuclear power plant, the main water feed pump, the starting water feed pump, the condensate pump, the clean condensate pump, the closed cooling water pump, the seawater booster pump of the conventional island, the safe plant water pump of the pump room, the fire-fighting water pump and other important pump equipment all utilize mechanical seals as shaft seal parts.
Most of mechanical seal spare parts are sampled and visually inspected when leaving a factory, and meanwhile, due to uncertain factors in the transportation process, if potential leakage positions such as an O-shaped sealing ring, a moving ring and a static ring of the mechanical seal are damaged, the mechanical seal is likely to leak.
For the mechanical seal of the self-renewing maintenance of the nuclear power plant, if the maintenance quality problems that mechanical seal parts such as an O-shaped seal ring and a spring are not installed in place, the compression amount of the mechanical seal is not adjusted properly and the like occur, the mechanical seal can also leak.
The mechanical seal of the rotating equipment of the nuclear power plant is part of the seal boundary of the rotating equipment, and the mechanical seal of part of the rotating equipment is also part of the defense pressure boundary of the nuclear power plant (such as a main pump mechanical seal). In order to verify and improve the reliability of the mechanical seal and ensure the safe and stable operation of the nuclear power plant, particularly for the mechanical seal sealed by acid, alkali and radioactive media, in order to reduce the influence on the ecological environment, before the mechanical seal is installed on the rotating mechanical equipment, a tightness test of the mechanical seal is very necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a mechanical seal tightness test device for rotary equipment in a nuclear power plant, which can meet the requirements of test equipment, test media, test pressure, test temperature, test time, test methods, acceptance standards of test results and the like of the mechanical seal tightness test of the rotary equipment in the nuclear power plant.
The technical scheme adopted by the utility model is as follows:
a mechanical sealing performance test device for rotary equipment of a nuclear power plant comprises a pressurizing pump, an inlet pipeline, an outlet pipeline, a sealing test shell and a mechanical sealing assembly, wherein a through hole is formed in the middle of an outer cylinder of the sealing test shell, the inlet pipeline is inserted into the through hole, the pressurizing pump is communicated with the inside of the sealing test shell through the inlet pipeline, a through hole is formed in the bottom of the outer cylinder of the sealing test shell, and the outlet pipeline is inserted into the through hole and communicated with the inside of the sealing test shell; the mechanical seal assembly is inserted from the top of the seal test housing.
The sealing test shell is composed of an inner hollow cylinder and an outer hollow cylinder, and the main body part is integrally processed and formed.
The upper part of the outer cylinder body of the sealing test shell is connected with the mechanical sealing assembly through a bolt hole.
An inlet valve and a pressure gauge are sequentially arranged on the inlet pipeline.
And an outlet valve is arranged on the outlet pipeline.
The mechanical seal assembly comprises a mechanical seal shaft sleeve locking ring, a mechanical seal shaft sleeve and a mechanical seal gland, the mechanical seal shaft sleeve is sleeved on the inner cylinder body of the seal test shell, the mechanical seal gland is in seal contact with a supporting surface at the top of the seal test shell and is fixedly connected with the mechanical seal gland through a bolt, and the mechanical seal shaft sleeve locking ring is fixed with the mechanical seal gland.
The mechanical seal shaft sleeve locking ring is embedded into the groove of the mechanical seal sleeve through the locking piece to position the moving and static ring positions of the mechanical seal.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the utility model provides a mechanical seal tightness test device for rotary equipment in a nuclear power plant, which is used for performing a seal tightness test on the mechanical seal of the rotary equipment before use on a nuclear power plant equipment overhaul site to realize quantitative evaluation on the integrity of the mechanical seal;
(2) the utility model provides a mechanical seal tightness test device for rotary equipment of a nuclear power plant, which can effectively verify the quality of mechanical seal, improve the reliability of the equipment and ensure the safe and stable operation of the nuclear power plant;
(3) the utility model provides a mechanical seal tightness test device for rotary equipment of a nuclear power plant, which reduces the cost of repeated maintenance of the equipment, has great benefits for improving the operation stability of key sensitive equipment and preventing shutdown and shutdown of the nuclear power plant caused by the defects of the key sensitive equipment;
(4) the utility model provides a mechanical seal tightness test device for rotary equipment in a nuclear power plant, which effectively prevents harmful media such as acid, alkali, radioactivity and the like from leaking, thereby playing a role in protecting the ecological environment.
Drawings
FIG. 1 is a front view of a mechanical seal tightness testing device for a rotating equipment of a nuclear power plant provided by the present invention;
FIG. 2 is a top view of a mechanical seal tightness testing device for a rotating equipment of a nuclear power plant provided by the utility model;
fig. 3 is a schematic view of the mechanical seal assembled with the present invention.
Wherein: 1-a pressurizing pump; 2-an inlet valve; 3-a pressure gauge; 4-an inlet duct; 5-an outlet pipe; 6-an outlet valve; 7-sealing the test housing; 8, mechanically sealing a shaft sleeve locking ring; 9-mechanical seal shaft sleeve; 10-mechanical sealing gland; 11-mechanical seal assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, the mechanical sealing performance testing device for the rotary equipment of the nuclear power plant, provided by the utility model, comprises a pressurizing pump 1, an inlet valve 2, a pressure gauge 3, an inlet pipe 4, an outlet pipe 5, an outlet valve 6 and a sealing test casing 7. The sealing test shell 7 consists of an inner hollow cylinder and an outer hollow cylinder, and the main body part is integrally processed and molded. The upper portion of the outer barrel of the seal test shell 7 is connected with the mechanical seal assembly through the bolt hole, the middle portion of the outer barrel of the seal test shell 7 is provided with a through hole, the inlet pipeline 4 is inserted into the through hole, the pressurizing pump 1 is communicated with the inside of the seal test shell 7 through the inlet pipeline 4, the inlet valve 2 and the pressure gauge 3 are sequentially arranged on the inlet pipeline 4, the bottom of the outer barrel of the seal test shell 7 is provided with a through hole, the outlet pipeline 5 is inserted into the through hole and communicated with the inside of the seal test shell 7, and the outlet pipeline 5 is provided with an outlet valve 6.
As shown in fig. 3, the mechanical seal assembly 11 is inserted from the top of the seal test housing 7, the mechanical seal assembly 11 includes a mechanical seal shaft sleeve locking ring 8, a mechanical seal shaft sleeve 9, and a mechanical seal gland 10, the mechanical seal shaft sleeve 9 is sleeved on the inner cylinder of the seal test housing 7, the mechanical seal gland 10 is in sealing contact with the supporting surface at the top of the seal test housing 7 and is fixedly connected by a bolt, the mechanical seal shaft sleeve locking ring 8 is fixed with the mechanical seal gland 10 by a bolt, and simultaneously, the mechanical seal shaft sleeve locking ring 8 is embedded in the groove of the mechanical seal gland 9 by a locking piece to position the dynamic and static rings of the mechanical seal.
The working principle of the utility model is as follows:
assembling a pressurizing pump 1, an inlet valve 2, a pressure gauge 3 and an inlet pipeline 4 into a whole to be connected with a sealing test shell 7; the outlet pipeline 5 and the outlet valve 6 are assembled into a whole to be connected with the sealing test shell 7; assembling the mechanical seal assembly 11 and the seal test shell 7 into a sealed chamber and fastening; opening the inlet valve 2 and closing the outlet valve 6; sealing test medium water or gas is pressurized to standard sealing test pressure through the pressurizing pump 1, the inlet stop valve 2 is closed to keep pressure testing pressure, the pressure maintaining condition is checked through the pressure gauge 3 after specified pressure maintaining time, and whether the sealing performance of the detected mechanical seal is good or not is judged. And opening the outlet valve 6 to release pressure after the mechanical seal tightness test is finished, dismantling the mechanical seal assembly 11, and recovering each equipment part to an initial state.
When air is used as a medium for a sealing test, normal-temperature clean compressed air is used according to the pressure of 1.8bar (gauge pressure), the pressure maintaining time is at least 5 minutes, and the pressure drop during the pressure maintaining period is not more than 0.14 bar; when a sealing test is carried out by taking water as a medium, normal-temperature clean water is used, the pressure is 1.25 times of the working pressure, the pressure maintaining time is at least 10 minutes, and the pressure drop does not occur during the pressure maintaining period.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides a nuclear power plant rotating equipment mechanical seal leakproofness test device which characterized in that: the device comprises a pressurizing pump (1), an inlet pipeline (4), an outlet pipeline (5), a sealing test shell (7) and a mechanical seal assembly (11), wherein a through hole is formed in the middle of an outer cylinder of the sealing test shell (7), the inlet pipeline (4) is inserted into the through hole, the pressurizing pump (1) is communicated with the inside of the sealing test shell (7) through the inlet pipeline (4), a through hole is formed in the bottom of the outer cylinder of the sealing test shell (7), and the outlet pipeline (5) is inserted into the through hole and communicated with the inside of the sealing test shell (7); the mechanical seal assembly (11) is inserted from the top of the seal test housing (7).
2. The mechanical seal tightness test device for the nuclear power plant rotating equipment according to claim 1, wherein: the sealing test shell (7) is composed of an inner hollow cylinder and an outer hollow cylinder, and the main body part is integrally processed and formed.
3. The mechanical seal tightness test device for the nuclear power plant rotating equipment according to claim 1, wherein: the upper part of the outer cylinder of the sealing test shell (7) is connected with the mechanical sealing assembly through a bolt hole.
4. The mechanical seal tightness test device for the nuclear power plant rotating equipment according to claim 1, wherein: an inlet valve (2) and a pressure gauge (3) are sequentially arranged on the inlet pipeline (4).
5. The mechanical seal tightness test device for the nuclear power plant rotating equipment according to claim 1, wherein: an outlet valve (6) is arranged on the outlet pipeline (5).
6. The mechanical seal tightness test device for the nuclear power plant rotating equipment according to claim 1, wherein: the mechanical seal assembly (11) comprises a mechanical seal shaft sleeve locking ring (8), a mechanical seal shaft sleeve (9) and a mechanical seal gland (10), the mechanical seal shaft sleeve (9) is sleeved on an inner cylinder body of the seal test shell (7), the mechanical seal gland (10) is in seal contact with a supporting surface at the top of the seal test shell (7) and is fixedly connected with the mechanical seal shaft sleeve locking ring (8) through a bolt, and the mechanical seal shaft sleeve locking ring (8) is fixed with the mechanical seal gland (10).
7. The mechanical seal tightness test device for the nuclear power plant rotating equipment according to claim 6, wherein: and the mechanical seal shaft sleeve locking ring (8) is embedded into the groove of the mechanical seal shaft sleeve (9) through a locking sheet to position the moving and static ring positions of the mechanical seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117704.1U CN216815899U (en) | 2021-12-08 | 2021-12-08 | Mechanical seal tightness test device for rotary equipment of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123117704.1U CN216815899U (en) | 2021-12-08 | 2021-12-08 | Mechanical seal tightness test device for rotary equipment of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216815899U true CN216815899U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123117704.1U Active CN216815899U (en) | 2021-12-08 | 2021-12-08 | Mechanical seal tightness test device for rotary equipment of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216815899U (en) |
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2021
- 2021-12-08 CN CN202123117704.1U patent/CN216815899U/en active Active
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