CN115629123B - An umbrella-shaped device for preventing foreign objects from entering a VVER horizontal steam generator during eddy current inspection. - Google Patents
An umbrella-shaped device for preventing foreign objects from entering a VVER horizontal steam generator during eddy current inspection.Info
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- CN115629123B CN115629123B CN202110804729.4A CN202110804729A CN115629123B CN 115629123 B CN115629123 B CN 115629123B CN 202110804729 A CN202110804729 A CN 202110804729A CN 115629123 B CN115629123 B CN 115629123B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
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- High Energy & Nuclear Physics (AREA)
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Abstract
本发明公开了一种用于VVER卧式蒸汽发生器涡流检查的防异物伞形装置，包括动力模块、支撑模块和防异物伞圈，所述的支撑模块将动力模块和防异物伞圈连接在一起。本发明的有益效果在于：在VVER卧式蒸汽发生器涡流检测中，防异物伞形装置的设计使用达到了以下效果：1)可以迅速地打开关闭，提升了涡流检查设备安装拆卸地工作效率；2)支撑部分采用向上折叠的结构，收缩后整体的长度更短，便于搬运安装；3)伞布向上包裹折叠，保证了异物在伞布收缩过程中不会从其边缘滑落；4)减少班组成员的工作量，降低设备安装的集体辐射剂量；5)滚珠轴承被更换，销轴由双边卡簧变为单边，降低了异物风险。
This invention discloses a foreign object prevention umbrella-shaped device for eddy current inspection of VVER horizontal steam generators, comprising a power module, a support module, and a foreign object prevention umbrella ring. The support module connects the power module and the foreign object prevention umbrella ring together. The beneficial effects of this invention are as follows: In eddy current inspection of VVER horizontal steam generators, the design and use of the foreign object prevention umbrella-shaped device achieves the following effects: 1) It can be quickly opened and closed, improving the efficiency of eddy current inspection equipment installation and disassembly; 2) The support part adopts an upward folding structure, resulting in a shorter overall length after retraction, facilitating handling and installation; 3) The umbrella cloth is folded upwards, ensuring that foreign objects will not slip off its edges during the retraction process; 4) It reduces the workload of team members and lowers the collective radiation dose during equipment installation; 5) The ball bearings are replaced, and the pin shaft is changed from a double-sided retaining ring to a single-sided one, reducing the risk of foreign objects.
Description
Technical Field
The invention belongs to a nondestructive testing device of a horizontal steam generator of a nuclear power station, and particularly relates to an anti-foreign-matter umbrella-shaped device for vortex inspection of a VVER horizontal steam generator.
Background
In nuclear power plants, steam generator heat transfer tubes are an important component of a circuit pressure boundary, with the pressure boundary area accounting for over 70% of a circuit boundary. The horizontal steam generator adopts a vertical double-collecting pipe structure, is divided into a loop coolant inlet collecting pipe and a loop coolant outlet collecting pipe, and the two collecting pipes are connected through a horizontally arranged heat transfer pipe bundle. Because the wall thickness of the horizontal steam generator heat transfer tube is only 1.5mm and the horizontal steam generator heat transfer tube needs to operate under the working condition of high temperature and high pressure, the heat transfer tube becomes a weak part of a loop pressure boundary, and each nuclear power country at home and abroad periodically performs pre-service inspection and in-service inspection on the steam generator heat transfer tube.
To finish the vortex inspection of the heat transfer pipe of the horizontal steam generator, vortex inspection equipment needs to be integrally hung into a collecting pipe of the steam generator, if equipment parts are loosened and fall off in the implementation process of the vortex inspection, foreign matters are formed in the heat transfer pipe, and the operation safety of a nuclear power station is seriously threatened. The eddy current inspection equipment has the problems of hole position positioning offset and the like in the operation process, and the foreign matter prevention umbrella has stronger neutrality and stability, so that the problem is perfectly solved. Therefore, the foreign matter preventing umbrella can prevent foreign matters from falling off and can support and center the lower part of the vortex flow inspection equipment, which is an indispensable part of the vortex flow inspection equipment.
Disclosure of Invention
The invention aims to provide the foreign matter prevention umbrella-shaped device for vortex inspection of the VVER horizontal steam generator, which is pushed by air pressure, and the device is rapid and continuous in opening and shrinkage actions, is convenient to install, can obviously improve the working efficiency, lightens the labor intensity of installers, has good foreign matter prevention effect and ensures the stable and reliable operation of a nuclear power unit.
The technical scheme is that the foreign matter prevention umbrella-shaped device for vortex inspection of the VVER horizontal steam generator comprises a power module, a supporting module and a foreign matter prevention umbrella ring, wherein the supporting module is used for connecting the power module and the foreign matter prevention umbrella ring together.
The power module comprises a cylinder body, a pull rod seat and a piston, wherein the piston is arranged in the cylinder body, an end plate seals an opening of the cylinder body through a fixing screw, the end head of the piston is connected with a push rod, the upper part of the cylinder body is connected with a middle shaft, and the top of the cylinder body is fixed on the pull rod seat.
The pull rod seat and the piston are both made of aluminum alloy.
The middle shaft is provided with a central hole, and compressed air is introduced into the central hole to power the air cylinder.
The supporting module comprises pull rods, three pull rods are connected to the pull rod seat, the pull rod seat is connected with one end of each pull rod through a first pin shaft, the other end of each pull rod is connected with supporting wheel seats through a second pin shaft, the total number of the supporting wheel seats is 3, each supporting wheel seat is connected with a bearing, a supporting wheel is sleeved outside each bearing, an umbrella ring is fixed to the bottom of each supporting wheel seat through a screw, each supporting wheel seat is further connected with one end of one supporting rod through a third pin shaft, the other end of each supporting rod is connected with a connecting pushing rod through a fourth pin shaft, and the pushing rod is connected with a roller through a fifth pin shaft.
The cylinder body, the pull rod seat, the pull rod, the support rod and the support wheel seat form a four-bar mechanism together through a pin shaft, and the whole device shares three groups of four-bar mechanisms, so that stable three-point support is formed.
The surface of the supporting wheel is made of soft nonmetallic materials.
The umbrella ring is formed into a complete circle by three groups of 9 sections of brackets.
The umbrella ring is made of a metal material with higher strength.
The umbrella cloth is arranged below the umbrella ring through the hanging piece and is used for receiving foreign matters which can fall from the upper part.
The invention has the beneficial effects that in the vortex detection of the VVER horizontal steam generator, the design and use of the foreign matter umbrella-shaped device achieve the following effects:
1) The vortex flow inspection device can be rapidly opened and closed, so that the working efficiency of the installation and disassembly of the vortex flow inspection device is improved;
2) The supporting part adopts an upward folding structure, the whole length after contraction is shorter, and the carrying and the installation are convenient;
3) The umbrella cloth is wrapped and folded upwards, so that foreign matters cannot slide off the edge of the umbrella cloth in the shrinkage process of the umbrella cloth;
4) The workload of team members is reduced, and the collective radiation dose of equipment installation is reduced;
5) The ball bearing is replaced, and the pin shaft is changed into a single side from the double-side snap spring, so that the risk of foreign matters is reduced.
Drawings
FIG. 1 is a schematic view of an open state of an anti-foreign body umbrella-shaped device for vortex inspection of a VVER horizontal steam generator;
FIG. 2 is a top view of an open state of an anti-foreign body umbrella-shaped device for vortex inspection of a VVER horizontal steam generator;
Fig. 3 is a view showing a part of an anti-foreign matter umbrella-shaped device for vortex inspection of a VVER horizontal steam generator.
In the figure, a cylinder body 1, a pull rod seat 2, a piston 3, a pull rod 4, a support rod 5, a support wheel seat 6, a support wheel 7, a roller 8, a first pin shaft 9, a second pin shaft 10, a third pin shaft 11, a fourth pin shaft 12, a fifth pin shaft 13, an umbrella ring 14, a screw 15, a bearing 16, an end plate 17, a push rod 18, a fixing screw 19 and a middle shaft 20 are arranged.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 1-3, an anti-foreign-matter umbrella-shaped device for vortex inspection of a VVER horizontal steam generator comprises a power module, a support module and an anti-foreign-matter umbrella ring, wherein the support module connects the power module and the anti-foreign-matter umbrella ring together.
The power module comprises a cylinder body 1, a pull rod seat 2 and a piston 3, wherein the piston 3 is arranged in the cylinder body 1, an end plate 17 seals an opening of the cylinder body 1 through a fixing screw 19, the end head of the piston 3 is connected with a push rod 18, the upper part of the cylinder body 1 is connected with a middle shaft 20, two sealing devices are arranged between the middle shaft 20 and the upper part of the cylinder body 1, the top of the cylinder body 1 is fixed on the pull rod seat 2, the pull rod seat 2 and the piston 3 are made of metal with higher strength (aluminum alloy is selected in the embodiment of the invention), and the stability of the module is ensured. The intermediate shaft 20 is installed in the center hole of the bottom plate of the eddy current inspection apparatus and is fixed by a snap spring. The intermediate shaft 20 is provided with a central hole through which compressed air is introduced to power the cylinder.
The supporting module comprises 3 pull rods 4 connected to a pull rod seat 2, the pull rod seat 2 is connected with one end of each pull rod 4 through a first pin shaft 9, the other end of each pull rod 4 is connected with a supporting wheel seat 6 through a second pin shaft 10, the number of the supporting wheel seats is 3, each supporting wheel seat 6 is connected with a bearing 16, a supporting wheel 7 is sleeved outside the bearing 16, an umbrella ring 14 is fixed to the bottom of each supporting wheel seat 6 through a screw 15, each supporting wheel seat 6 is further connected with one end of a supporting rod through a third pin shaft 11, the other end of each supporting rod 5 is connected with a connecting pushing rod 18 through a fourth pin shaft 12, and the pushing rod 18 is connected with a roller 8 through a fifth pin shaft 13.
The cylinder body 1, the pull rod seat 2, the pull rod 4, the support rod 5 and the support wheel seat 6 form a four-bar mechanism together through pin shafts, and the whole device shares three groups of four-bar mechanisms, so that stable three-point support is formed. Moreover, when the foreign body umbrella is closed, the mechanism can completely wrap the things in the umbrella cloth, and the possibility that the foreign body falls off when the foreign body umbrella is closed in the past is avoided. The tail end of the supporting wheel seat 6 is provided with a rotatable supporting wheel 7, so that the equipment can move up and down when being installed. The design mounting position of the supporting wheel 7 is slightly higher than the umbrella ring 14, so that the problem that umbrella cloth is clamped between the supporting wheel 7 and the wall of the current collecting pipe to cause opening deformation of the umbrella cloth is effectively solved, and smooth hoisting of equipment is ensured.
The surface of the supporting wheel 7 is made of soft nonmetallic materials (rubber and the like in the embodiment of the invention), and the damage to the wall of the collecting pipe at the contact part with the supporting wheel can be avoided on the premise of ensuring enough supporting force. The middle of the supporting wheel 7 is arranged at the tail end of the supporting wheel seat 6 through a ball bearing and a bearing 16 so as to ensure that the supporting wheel has good rotation performance.
The umbrella ring 14 is arranged below the supporting wheel seat 6 through screws 15, the umbrella ring 14 is formed into a complete circle by three groups of 9-section brackets together, and the umbrella ring 14 is made of a metal material with higher strength (stainless steel in the embodiment of the invention) so as to ensure the integral stability of the umbrella ring after being unfolded.
Umbrella cloth is arranged below the umbrella ring 14 through a hanging piece and is used for receiving foreign matters which can fall from the upper part. The umbrella cloth is usually made of flexible waterproof materials (waterproof tarpaulins and the like in the embodiment of the invention), and has enough strength to ensure that the umbrella cloth cannot be damaged in the use process, and is light, soft and easy to fold.
The ball bearing connected with the pin shaft 12 is replaced by a copper shaft sleeve, the ball bearing connected with the pin shaft 13 is replaced by a hard shaft wheel, and the possibility that the ball bearing is damaged due to the stress of a foreign object umbrella in the hoisting process to form foreign objects is effectively avoided on the premise of unchanged using effect.
The working mode of the invention is as follows:
When the device is used, the device is hoisted to the vicinity of the bottom of the collecting pipe along with equipment, when a compressed air valve is opened, air enters the air cylinder 1 to push the piston 3 to move downwards, the bottom of the air cylinder 1 pushes the roller 8 at the tail end of the supporting rod 5 to move downwards, so that the supporting rod 5 is turned into the horizontal direction from the vertical oblique downward direction when folded, and finally, the supporting module is driven to be turned into the horizontal direction from the vertical oblique upward direction when folded, and the whole spreading diameter of the device reaches the maximum state. The action is rapid, and the labor intensity of equipment installers can be greatly reduced. When the equipment is disassembled, the compressed air valve is closed, the supporting rod 5 moves downwards under the action of gravity and spring tension, the supporting module is folded upwards, and the supporting wheel is separated from the wall of the collecting pipe. The supporting module is folded to move to drive the whole umbrella ring and the umbrella cloth to fold and shrink upwards, and finally foreign matters received in the umbrella cloth are wrapped in the umbrella cloth. After the vortex inspection equipment is integrally lifted out of the collecting pipe, the foreign matters can be taken out of the umbrella cloth, and the risk that the foreign matters fall into the collecting pipe is eliminated.
Claims (6)
1. The foreign matter prevention umbrella-shaped device for vortex inspection of the VVER horizontal steam generator is characterized by comprising a power module, a supporting module and a foreign matter prevention umbrella ring, wherein the supporting module is used for connecting the power module and the foreign matter prevention umbrella ring together;
The power module comprises a cylinder body, a pull rod seat and a piston, wherein the piston is arranged in the cylinder body, an end plate seals an opening of the cylinder body through a fixing screw, the end head of the piston is connected with a push rod, the upper part of the cylinder body is connected with an intermediate shaft, and the top of the cylinder body is fixed on the pull rod seat;
The supporting module comprises pull rods, three pull rods are connected to a pull rod seat, the pull rod seat is connected with one end of each pull rod through a first pin shaft, the other end of each pull rod is connected with supporting wheel seats through a second pin shaft, the total number of the supporting wheel seats is 3, each supporting wheel seat is connected with a bearing, a supporting wheel is sleeved on each bearing, an umbrella ring is fixed to the bottom of each supporting wheel seat through a screw, each supporting wheel seat is also connected with one end of one supporting rod through a third pin shaft, the other end of each supporting rod is connected with a pushing rod through a fourth pin shaft, and the pushing rod is connected with a roller through a fifth pin shaft; the middle shaft is provided with a center hole, compressed air is introduced into the center hole to provide power for the air cylinder, umbrella cloth is arranged below the umbrella ring through a hanging piece and used for bearing foreign matters which can fall from the upper part, the air enters the air cylinder to push the piston to move downwards, the bottom of the air cylinder pushes the roller at the tail end of the supporting rod to move downwards, so that the supporting rod is turned from the vertical oblique direction to the lower direction when being folded, and finally the supporting module is driven to be turned from the vertical oblique direction to the horizontal direction when being folded, and the whole opening diameter of the device reaches the maximum state.
2. The foreign matter prevention umbrella-shaped device for vortex inspection of VVER horizontal steam generator of claim 1, wherein the pull rod seat and the piston are both made of aluminum alloy.
3. The foreign matter prevention umbrella-shaped device for vortex inspection of a VVER horizontal steam generator as claimed in claim 1, wherein the cylinder body, the pull rod seat, the pull rod, the support rod and the support wheel seat form a four-bar mechanism together through pin shafts, and the whole device is provided with three groups of four-bar mechanisms so as to form stable three-point support.
4. The foreign matter prevention umbrella-shaped device for vortex inspection of VVER horizontal steam generator as claimed in claim 1, wherein the surface of the supporting wheel is made of soft nonmetallic materials.
5. The foreign matter prevention umbrella-shaped device for vortex inspection of VVER horizontal steam generator of claim 1, wherein the umbrella ring is formed into a complete circle by three groups of 9-joint brackets.
6. The foreign matter prevention umbrella-shaped device for vortex inspection of VVER horizontal steam generator of claim 5, wherein the umbrella ring is made of a metal material with high strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110804729.4A CN115629123B (en) | 2021-07-16 | 2021-07-16 | An umbrella-shaped device for preventing foreign objects from entering a VVER horizontal steam generator during eddy current inspection. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110804729.4A CN115629123B (en) | 2021-07-16 | 2021-07-16 | An umbrella-shaped device for preventing foreign objects from entering a VVER horizontal steam generator during eddy current inspection. |
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| CN115629123A CN115629123A (en) | 2023-01-20 |
| CN115629123B true CN115629123B (en) | 2025-12-05 |
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| CN202110804729.4A Active CN115629123B (en) | 2021-07-16 | 2021-07-16 | An umbrella-shaped device for preventing foreign objects from entering a VVER horizontal steam generator during eddy current inspection. |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114199995A (en) * | 2021-12-14 | 2022-03-18 | 中核武汉核电运行技术股份有限公司 | A kind of anti-foreign body umbrella device for VVER horizontal steam generator eddy current inspection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201689076U (en) * | 2009-11-27 | 2010-12-29 | 中核武汉核电运行技术股份有限公司 | Umbrella-type support centring device of eddy current inspection device for heat transfer pipe of horizontal steam generator |
| CN208479015U (en) * | 2018-05-15 | 2019-02-05 | 中国南方电网有限责任公司超高压输电公司梧州局 | A kind of portable high altitude operation maintenance auxiliary falling stop device |
| CN215866501U (en) * | 2021-07-16 | 2022-02-18 | 中核武汉核电运行技术股份有限公司 | Foreign matter prevention umbrella-shaped device for VVER horizontal steam generator eddy current inspection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100291391B1 (en) * | 1998-12-30 | 2001-06-01 | 장인순 | Non-destructive Umbrella Type Eddy Current Probe for Nondestructive Testing of Steam Generator Spiral Heater Tubes |
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- 2021-07-16 CN CN202110804729.4A patent/CN115629123B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201689076U (en) * | 2009-11-27 | 2010-12-29 | 中核武汉核电运行技术股份有限公司 | Umbrella-type support centring device of eddy current inspection device for heat transfer pipe of horizontal steam generator |
| CN208479015U (en) * | 2018-05-15 | 2019-02-05 | 中国南方电网有限责任公司超高压输电公司梧州局 | A kind of portable high altitude operation maintenance auxiliary falling stop device |
| CN215866501U (en) * | 2021-07-16 | 2022-02-18 | 中核武汉核电运行技术股份有限公司 | Foreign matter prevention umbrella-shaped device for VVER horizontal steam generator eddy current inspection |
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