CN111287988A - On-site video inspection method for locking cup of shielding main pump - Google Patents
On-site video inspection method for locking cup of shielding main pump Download PDFInfo
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- CN111287988A CN111287988A CN202010303177.4A CN202010303177A CN111287988A CN 111287988 A CN111287988 A CN 111287988A CN 202010303177 A CN202010303177 A CN 202010303177A CN 111287988 A CN111287988 A CN 111287988A
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- inspection
- main pump
- locking cup
- space
- shielding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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- Computer Vision & Pattern Recognition (AREA)
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Mechanical Engineering (AREA)
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- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
A shielding main pump locking cup on-site video inspection method comprises the following steps: step S1: a flexible guide pipe which extends to a position near an inspection space is arranged at an inspection inlet of the shielding main pump, wherein the inspection space is arranged between a thrust bearing and a locking cup in the shielding main pump; step S2: extending an endoscope probe into an examination space along a soft catheter; step S3: and operating the endoscope probe to enable the endoscope probe to circularly walk along the examination space to examine the locking cup. The invention can carry out video inspection on the locking cup of the shielding main pump in a nuclear power plant in a high-radioactivity environment of the in-situ shielding pump, and guide the endoscope probe to reach an inspection space through the soft guide pipe, thereby realizing that the endoscope probe completes a plurality of 90-degree turns in a narrow space to complete the video inspection on the surface of the locking cup of the shielding pump.
Description
Technical Field
The invention belongs to the field of nuclear power station shielded reactor coolant pump (hereinafter referred to as shielded main pump) inspection, and particularly relates to a method for performing video inspection on a locking cup of a main pump under the condition that the shielded main pump is not disassembled in a local high-radioactivity environment.
Background
The nuclear power station shielding main pump is core equipment of a nuclear power station, a locking cup of the shielding main pump possibly has a manufacturing stress concentration or weak area in the manufacturing process, and after the locking cup runs for a long time, the locking cup is influenced by temperature, stress, vibration and the like, so that the defect caused by service can be generated, and even the running of a unit is influenced in a severe case.
The locking cup is located inside the shielded main pump and is an annular component, and a thrust bearing is arranged outside the annular component. Through the structural analysis of the locking cup, the difficulty of determining the inspection is mainly as follows: 1. narrow examination space: the locking cup is positioned in the center of the interior of the shielding pump, the outer side of the locking cup is surrounded by the thrust bearing, and an annular space with a clearance of only about 6.3mm is formed between the locking cup and the thrust bearing; 2. the checking path is complex: the inspection inlet is arranged at the lower part of the shielding pump, the endoscope probe is upwards folded by 4-6 90 degrees to reach the inspection part, and the inspection of all the inspection parts is finished; 3. the inspection risk is large: in the inspection process, if the card is taken out through the withdrawal unable inspection position of inspection position, the endoscope camera lens can only disintegrate the main pump and take out, takes a lot of work and time, influences the operation of unit moreover, and the loss will be hundreds of millions, and amount of money is huge. There is therefore a need to create a method that enables inspection activities to be performed safely.
How to develop a method for video inspection of a main pump locking cup in a radioactive environment is a core content of the method, which can conveniently and quickly find defects so as to find and support treatment in time and further ensure stable operation of a power station.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for checking the local video of a locking cup of a shielding main pump.
A shielding main pump locking cup on-site video inspection method comprises the following steps:
step S1: a flexible guide pipe which extends to a position near an inspection space is arranged at an inspection inlet of the shielding main pump, wherein the inspection space is arranged between a thrust bearing and a locking cup in the shielding main pump;
step S2: extending an endoscope probe into an examination space along a soft catheter;
step S3: and operating the endoscope probe to enable the endoscope probe to circularly walk along the examination space to examine the locking cup.
The invention can carry out video inspection on the locking cup of the shielding main pump in a nuclear power plant in a high-radioactivity environment of the shielding main pump, and the endoscope probe is guided to the inspection space through the soft guide pipe, so that the endoscope probe can complete a plurality of 90-degree turns in a narrow space to complete the video inspection on the surface of the locking cup of the shielding pump.
Preferably, in step S1, the path of the flexible catheter extending to the position near the examination space is: the inspection main pump is horizontally extended to the lower part of the shield pump from an inspection inlet of the shield main pump, then is bent by 90 degrees to extend upwards and enters a cavity at the lower part of the locking nut through a central hole, then is bent by 90 degrees to extend horizontally, and after the horizontal extension is performed for a distance, is bent by 90 degrees to be vertical and extends upwards to a position near an inspection space. The soft conduit is determined according to the specific structure of the shielded main pump and has 3 turns of 90 degrees.
Preferably, in step S1, the flexible conduit is a PPR flexible conduit with 8-12 mm. The flexible conduit is in the form of a PPR hose, and has certain rigidity and flexibility and can maintain the same after being bent.
Preferably, the flexible conduit is a 10mm PPR flexible conduit.
Preferably, in step S3, the diameter of the endoscope probe is less than or equal to 4 mm. Ensuring that the endoscope probe can extend into a narrow examination space.
Preferably, in step S1, a left soft catheter, a right soft catheter, and a middle soft catheter are used and attached to the left, right, and middle portions of the examination entrance, respectively. Through setting up 3 soft pipes, the endoscope probe can stretch into examination space from 3 soft pipes, falls into three regional inspection to examination space, reduces the operation degree of difficulty of endoscope probe, guarantees the testing result.
Preferably, the endoscopic probe is a steerable probe structure.
Preferably, the inspection inlet is a lower water inlet of the shield main pump.
Preferably, the flexible conduit extends by rotation to an examination space entrance position. The method is an operation mode which can be well operated on site and is suitable for shielding the complex environment where the main pump is located without the help of foreign objects.
In conclusion, the invention has the following beneficial effects:
1: the shielding main pump locking cup can be subjected to video inspection in a nuclear power plant in a high-radioactivity environment of a shielding pump on site, the endoscope probe is guided to the inspection space through the soft guide pipe, the endoscope probe is enabled to complete multiple 90-degree turns in a narrow space, the video inspection on the surface of the shielding pump locking cup is completed, the operation is convenient, the inspection efficiency is high, the tool is simple, the investment is small, the inspection period is short, the power plant equipment is not damaged, and the inspection cost of the power plant is greatly saved;
2: the soft guide pipe enters the inspection space in a rotating mode without the help of foreign objects, and the operation mode is a good on-site operation mode which is suitable for shielding the complex environment where the main pump is located;
3: through setting up 3 soft pipes, the endoscope probe can stretch into examination space from 3 soft pipes, falls into three regional inspection to examination space, reduces the operation degree of difficulty of endoscope probe, guarantees the testing result.
Drawings
FIG. 1 is a flow chart of an inspection method;
fig. 2 is a walking view (in a cross-sectional state) of the soft catheter.
Detailed Description
The invention will be further explained by means of specific embodiments with reference to the drawings.
Example 1: a shielded main pump locking cup in-situ video inspection method comprises the following steps as shown in the figure:
step S1: the flexible guide pipe 1 is arranged at an inspection inlet of the shielding main pump and extends to a position near an inspection space, wherein the inspection space is arranged between a thrust bearing and a locking cup inside the shielding main pump, the inspection inlet is a water inlet at the lower end of the shielding main pump, and the flexible guide pipe 1 has certain rigidity and flexibility and can keep unchanged after being bent; the flexible conduit 1 can be extended to a position near an inspection space in a rotating mode without the help of foreign objects, and is an operating mode which can be well operated on site and is suitable for shielding the complex environment where the main pump is located; the flexible conduit 1 runs according to the specific structure of the shielded main pump, and specifically, in the present embodiment, the path of the flexible conduit 1 extending to the position near the inspection space is: referring to fig. 2, an inspection inlet of a shield main pump extends horizontally to the lower part of the shield main pump, then the inspection inlet is bent by 90 degrees to extend upwards and enters a cavity at the lower part of a locking nut 3 through a central hole 4, then the inspection inlet is bent by 90 degrees to extend horizontally, after the horizontal extension is carried out for a certain distance, the inspection inlet is bent by 90 degrees to be vertical and extends upwards to a position near an inspection space, the inspection space is positioned between a locking cup 5 and a thrust bearing 6, and the soft catheter 1 goes through 3 90-degree turns;
step S2: the endoscope probe 2 is extended into the examination space along the soft catheter 1; the endoscope probe 2 is a common part in the market, such as an optical endoscope, a fiber optic endoscope, an electronic endoscope and a probe of a CCD video endoscope, which is not explained in detail herein, and the endoscope probe 2 completes 1-3 90-degree turns when in an examination space;
step S3: operating the endoscope probe 2 to enable the endoscope probe 2 to circularly walk along the examination space, and examining the locking cup;
the invention can carry out video inspection on the locking cup of the shielding main pump in a nuclear power plant in a high-radioactivity environment of the shielding pump, and the endoscope probe 2 is guided to the inspection space through the soft guide pipe 1, so that the endoscope probe 2 can complete a plurality of 90-degree turns in a narrow space to complete the video inspection on the surface of the locking cup of the shielding pump.
In step S1, the flexible conduit 1 is made of 8-12mm PPR flexible pipe, which has certain rigidity and flexibility and is capable of being kept unchanged after bending, and preferably, the flexible conduit 1 is made of 10mm PPR flexible pipe.
In order to ensure that the endoscope probe 2 can be smoothly inserted into a narrow examination space, the diameter of the endoscope probe 2 is less than or equal to 4mm in step S3.
Preferably, in step S1, the left flexible catheter 1, the right flexible catheter 1, and the middle flexible catheter 1 are respectively attached to the left side, the right side, and the middle of the examination entrance. Through setting up 3 soft pipe 1, endoscope probe 2 can follow 3 soft pipe 1 and stretch into the inspection space, falls into three regional inspection to the inspection space, reduces endoscope probe 2's the operation degree of difficulty, guarantees the testing result.
In order to cooperate with the endoscope probe 2 to travel along the examination space in a circular manner, the endoscope probe 2 is of a steerable probe structure.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (9)
1. A shielding main pump locking cup on-site video inspection method is characterized by comprising the following steps:
step S1: a flexible guide pipe which extends to a position near an inspection space is arranged at an inspection inlet of the shielding main pump, wherein the inspection space is arranged between a thrust bearing and a locking cup in the shielding main pump;
step S2: extending an endoscope probe into an examination space along a soft catheter;
step S3: and operating the endoscope probe to enable the endoscope probe to circularly walk along the examination space to examine the locking cup.
2. The method for in-situ video inspection of a locking cup of a shielded main pump according to claim 1, wherein in step S1, the path of the flexible conduit extending to a position near the inspection space is as follows: the inspection main pump is horizontally extended to the lower part of the shield pump from an inspection inlet of the shield main pump, then is bent by 90 degrees to extend upwards and enters a cavity at the lower part of the locking nut through a central hole, then is bent by 90 degrees to extend horizontally, and after the horizontal extension is carried out for a distance, is bent by 90 degrees to be vertical and extends upwards to the position of an inspection space accessory.
3. The method of claim 1, wherein in step S1, the flexible conduit is an 8-12mm PPR flexible conduit.
4. The method of claim 3, wherein the flexible conduit is a 10mm PPR hose.
5. The method for video inspection of a locking cup of a shielded main pump in place as recited in claim 1, wherein the diameter of the endoscopic probe is less than or equal to 4mm in step S3.
6. The method for shielding the locking cup of the main pump according to claim 1, wherein in step S1, the flexible conduits comprise a left flexible conduit, a right flexible conduit and a middle flexible conduit, which are respectively installed at the left side part, the right side part and the middle part of the inspection inlet.
7. The method of claim 1, wherein said endoscopic probe is a steerable probe configuration.
8. The shielded main pump locking cup in situ video inspection method of claim 1, wherein the inspection inlet is a lower water inlet of the shielded main pump.
9. The method of claim 1, wherein in step S1, said flexible conduit is rotatably extended to a position near the inspection space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303177.4A CN111287988B (en) | 2020-04-17 | 2020-04-17 | Shielding main pump locking cup in-situ video inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303177.4A CN111287988B (en) | 2020-04-17 | 2020-04-17 | Shielding main pump locking cup in-situ video inspection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111287988A true CN111287988A (en) | 2020-06-16 |
| CN111287988B CN111287988B (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010303177.4A Active CN111287988B (en) | 2020-04-17 | 2020-04-17 | Shielding main pump locking cup in-situ video inspection method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6685667B1 (en) * | 2000-01-11 | 2004-02-03 | C. R. Bard, Inc. | Electrically powered surgical irrigator |
| CN206515261U (en) * | 2017-01-13 | 2017-09-22 | 浙江亚太机电股份有限公司 | A kind of endoscopy scaffold tower for checking pump cylinder internal flaw |
| CN107995856A (en) * | 2015-02-14 | 2018-05-04 | 波士顿科学希梅德公司 | System for Minimally Invasive Surgery gastro-intestinal therapeutic |
| CN108983407A (en) * | 2018-05-22 | 2018-12-11 | 王伟 | A kind of industrial endoscope auxiliary mechanical arm |
| CN109799604A (en) * | 2019-03-05 | 2019-05-24 | 华能国际电力股份有限公司玉环电厂 | A kind of endoscope guiding auxiliary device |
| DE102009011647B4 (en) * | 2009-03-04 | 2020-02-20 | Carl Zeiss Meditec Ag | CARS endoscope |
-
2020
- 2020-04-17 CN CN202010303177.4A patent/CN111287988B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6685667B1 (en) * | 2000-01-11 | 2004-02-03 | C. R. Bard, Inc. | Electrically powered surgical irrigator |
| DE102009011647B4 (en) * | 2009-03-04 | 2020-02-20 | Carl Zeiss Meditec Ag | CARS endoscope |
| CN107995856A (en) * | 2015-02-14 | 2018-05-04 | 波士顿科学希梅德公司 | System for Minimally Invasive Surgery gastro-intestinal therapeutic |
| CN206515261U (en) * | 2017-01-13 | 2017-09-22 | 浙江亚太机电股份有限公司 | A kind of endoscopy scaffold tower for checking pump cylinder internal flaw |
| CN108983407A (en) * | 2018-05-22 | 2018-12-11 | 王伟 | A kind of industrial endoscope auxiliary mechanical arm |
| CN109799604A (en) * | 2019-03-05 | 2019-05-24 | 华能国际电力股份有限公司玉环电厂 | A kind of endoscope guiding auxiliary device |
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| CN111287988B (en) | 2022-05-24 |
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