CN202307171U - Underwater operating device for locking nuclear fuel component skeleton nut - Google Patents
Underwater operating device for locking nuclear fuel component skeleton nut Download PDFInfo
- Publication number
- CN202307171U CN202307171U CN2011203893630U CN201120389363U CN202307171U CN 202307171 U CN202307171 U CN 202307171U CN 2011203893630 U CN2011203893630 U CN 2011203893630U CN 201120389363 U CN201120389363 U CN 201120389363U CN 202307171 U CN202307171 U CN 202307171U
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- CN
- China
- Prior art keywords
- pressure head
- hydraulic cylinder
- oil cylinder
- nuclear fuel
- fuel assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The utility model relates to the technical field of nuclear fuel component skeleton nut locking devices for nuclear power plants, and particularly discloses a nuclear fuel component skeleton nut locking device for the nuclear power plant. The device comprises a hydraulic cylinder, a sliding sleeve and an oil cylinder end transition connecting pipe. A push rod in the hydraulic cylinder is fixedly connected with the oil cylinder end transition connecting pipe through a sliding sleeve which is arranged in a cylindrical housing of the hydraulic cylinder. A rod-like pressure head is fixed at the lower end of the oil cylinder end transition connecting pipe. The lower end of the pressure head has a cylindrical structure. A 'V'-shaped groove is reserved on the lower end face of the pressure head. An auxiliary spring is also arranged on the oil cylinder end transition connecting pipe at the upper end of the pressure head. An auxiliary sleeve with a cylindrical structure is fixed at the lower end of the auxiliary spring, and is sleeved outside the pressure head. According to the device, the hydraulic cylinder is used for providing power; the device has a simple structure, and outlet pressure is stable and convenient to adjust; in addition, the auxiliary spring and the auxiliary sleeve are adopted, so that the whole device has certain flexibility, and is favorable for the positioning of a tool; and by the 'V'-shaped groove on the pressure head, a nut can be extrusion-formed at one time, and has a reliable shape.
Description
Technical field
The utility model belongs to nuclear power plant's nuclear fuel assembly skeleton nut locking device technical field, is specifically related to nuclear power plant's nuclear fuel assembly skeleton nut locking device.
Background technology
Nuclear power plant reloads in the process; Sometimes find that multiplexing fuel rod breakage and spacer grid of fuel assembly coaming plate have injury event in various degree, damaged security, economy, refuelling scheme and the overhaul duration of reloading to power plant's operation of fuel assembly appearance all produces significant impact behind the irradiation.The damaged leakage of fuel rod can cause radioactive fission product to leak in the circuit cools agent; Cause the increase and the staff of system's radioactive level to accept unnecessary radiation dose, damaged fuel assembly considers that the risk control of security of operation does not allow to go into again stack operation in principle.The local slight damage of spacer grid of fuel assembly coaming plate is meant the local slight damage of the peripheral coaming plate of screen work behind the irradiation, outer the sticking up of indivedual guide vane distortion.The local slight damage of grid spacer coaming plate, the outer fuel assembly that sticks up of guide vane distortion are in loading and unloading material process; Be easy to block, scrape, draw, cause the mutual hook damage of adjacent fuel assembly, make greatly difficulty of loading and unloading material generation with the generation of adjacent fuel assembly; And be in operation and also possibly cause damage the grid spacer of adjacent fuel assembly; Threaten the safe operation of fuel assembly, therefore, the local slight damage of grid spacer coaming plate, the outer assembly that sticks up of guide vane distortion could use after must proofreading and correct.Spacer grid of fuel assembly coaming plate major injury is meant that the screen work coaming plate seriously tears, sticks up and the guide vane gross distortion outward behind the irradiation; Greatly difficulty takes place except making the loading and unloading material in this major injury; Also cause fuel list rod that wear phenomenon takes place in the middle of operation easily; If these assemblies are not handled, in view of safe consideration will not allow back heap multiplexing.
Therefore, need repair under water damaged fuel assembly behind the irradiation.Because fuel assembly by assigning fuel rod to form in the skeleton structure, therefore will be checked and the refuelling rod, must dismantle end fitting through dismounting skeleton nut, thereby take, recombinate skeleton structure apart.In this process, need carry out locking operation under water to the skeleton nut that returns dress.
Summary of the invention
The purpose of the utility model is to provide a kind of underwater operation device that is used for the nut lock of nuclear fuel assembly skeleton, can realize nuclear fuel assembly skeleton nut is carried out locking operation under water.
The technical scheme of the utility model is following: a kind of underwater operation device that is used for the nut lock of nuclear fuel assembly skeleton; Comprise hydraulic cylinder, sliding sleeve and oil cylinder end transition adapter; Wherein, the push rod in the hydraulic cylinder is fixedly connected with oil cylinder end transition adapter through the sliding sleeve that is installed in the hydraulic cylinder cylindrical drum shell, and the transition of oil cylinder end is taken over the lower end and is fixed with shaft-like pressure head; The pressure head lower end is a cylindrical structure; And on the pressure head lower surface, have " V " type groove, and also being provided with auxiliary spring on the oil cylinder end transition conduit of pressure head upper end, the lower end of auxiliary spring is fixed with the auxiliary socket of the cylindrical tube shape structure that is enclosed within the pressure head outside.
Described sliding sleeve is the cylindrical structure that sidewall has limit sliding chutes, and is complementary with hydraulic cylinder shell cylindrical drum inner chamber, and stop pin passes the limit sliding chutes in the sliding sleeve, and is fixed on the hydraulic cylinder shell.
The described auxiliary socket outside has breach, can observe the pressure head in the auxiliary socket inner chamber.
Described oil cylinder end transition is taken over and is ladder cylindrical drum structure.
The remarkable result of the utility model is: the described a kind of underwater operation device that is used for the nut lock of nuclear fuel assembly skeleton of the utility model uses hydraulic cylinder that power is provided, and is simple in structure, and top hole pressure is stable and be convenient to regulate; Simultaneously, adopt auxiliary spring and auxiliary sleeve pipe, it is certain flexible that whole device is had, and is beneficial to the location of instrument; " V " type groove on the pressure head can make extrusion process one-shot forming, the shape of nut reliable.
Description of drawings
Fig. 1 is the described a kind of underwater operation apparatus structure synoptic diagram that is used for the nut lock of nuclear fuel assembly skeleton of the utility model;
Fig. 2 is the structural representation of pressuring head part among Fig. 1;
Among the figure: 1, hydraulic cylinder; 2, sliding sleeve; 3, stop pin; 4, the transition of oil cylinder end is taken over; 5, auxiliary spring; 6, auxiliary socket; 7, pressure head.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.
Like Fig. 1, shown in Figure 2, a kind of underwater operation device that is used for the nut lock of nuclear fuel assembly skeleton comprises hydraulic cylinder 1, sliding sleeve 2, oil cylinder end transition adapter 4 and pressure head 7; Wherein, Push rod in the hydraulic cylinder 1 is taken over 4 and is fixedly connected through being installed in sliding sleeve 2 and the transition of ladder cylindrical tube shape oil cylinder end in the hydraulic cylinder 1 cylindrical drum shell, and sliding sleeve 2 has the cylindrical structure of limit sliding chutes for sidewall, and is complementary with hydraulic cylinder 1 shell cylindrical drum inner chamber; Stop pin 3 passes the limit sliding chutes in the sliding sleeve 2; And be fixed on the shell of hydraulic cylinder 1, sliding sleeve 2 can only be in sliding sleeve 2 be moved up and down in the distance range of groove, the transition of oil cylinder end is taken over 4 lower ends and is fixed with shaft-like pressure head 7; Pressure head 7 lower ends are cylindrical structure; And on pressure head 7 lower surfaces, have " V " type groove, take on 4 in the oil cylinder end transition of pressure head 7 upper ends and be installed with auxiliary spring 5, the lower end of auxiliary spring 5 is fixed with the auxiliary socket 6 of the cylindrical tube shape structure that is enclosed within pressure head 7 outsides; And auxiliary socket 6 outsides have breach, can observe the pressure head 7 in auxiliary socket 6 inner chambers.
The described a kind of concrete course of work that is used for the underwater operation device of nuclear fuel assembly skeleton nut lock of the utility model is: the nuclear fuel assembly skeleton nut that the whole operation device is suspended in midair needs locking; Utilize the oil cylinder end transition of pressure head 7 upper ends to take on 4 fixing auxiliary springs 5 and the auxiliary spring 5 fixing auxiliary socket 6 front ends and tentatively aim at the nuclear fuel assembly skeleton nut that needs locking; Auxiliary socket 6 can be taken advantage of a situation and slipped into; Pressure head 7 is navigated on the nuclear fuel assembly skeleton nut; Push rod in the hydraulic cylinder 1 can be taken over hydraulic pressure on the pressure head 7 of 4 lower ends through mechanical transfer through taking over 4 with the sliding sleeve 2 that hydraulic cylinder 1 push rod is connected successively with the transition of oil cylinder end to the transition of oil cylinder end, " V " type groove forces nuclear fuel assembly skeleton nut tail end that local deformation is taken place on pressure head 7 lower surfaces; Nuclear fuel assembly skeleton nut and nuclear fuel assembly skeleton part can't be relatively rotated; Realization wherein, has limit sliding chutes to the locking of nuclear fuel assembly skeleton nut in sliding sleeve 2; And pass limit sliding chutes and the stop pin 3 that is fixed on the hydraulic cylinder 1 cooperates jointly, set the stroke of pressure head.
Claims (4)
1. underwater operation device that is used for the nut lock of nuclear fuel assembly skeleton; Comprise hydraulic cylinder (1), sliding sleeve (2) and oil cylinder end transition adapter (4); Wherein, Push rod in the hydraulic cylinder (1) is fixedly connected with oil cylinder end transition adapter (4) through the sliding sleeve (2) that is installed in hydraulic cylinder (1) the cylindrical drum shell; It is characterized in that: the transition of oil cylinder end is taken over (4) lower end and is fixed with shaft-like pressure head (7), and pressure head (7) lower end is a cylindrical structure, and on pressure head (7) lower surface, has " V " type groove; Also be provided with auxiliary spring (5) on the oil cylinder end transition conduit (4) of pressure head (7) upper end, the lower end of auxiliary spring (5) is fixed with the auxiliary socket (6) of the cylindrical tube shape structure that is enclosed within pressure head (7) outside.
2. a kind of underwater operation device that is used for the nut lock of nuclear fuel assembly skeleton according to claim 1; It is characterized in that: described sliding sleeve (2) has the cylindrical structure of limit sliding chutes for sidewall; And be complementary with hydraulic cylinder (1) shell cylindrical drum inner chamber; Stop pin (3) passes the limit sliding chutes in the sliding sleeve (2), and is fixed on hydraulic cylinder (1) shell.
3. a kind of underwater operation device that is used for the nut lock of nuclear fuel assembly skeleton according to claim 2 is characterized in that: described auxiliary socket (6) outside has breach, can observe the pressure head (7) in auxiliary socket (6) inner chamber.
4. be used for the underwater operation device of nuclear fuel assembly skeleton nut lock according to described any one of claim 1 to 3, it is characterized in that: described oil cylinder end transition is taken over (4) and is ladder cylindrical drum structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203893630U CN202307171U (en) | 2011-10-13 | 2011-10-13 | Underwater operating device for locking nuclear fuel component skeleton nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203893630U CN202307171U (en) | 2011-10-13 | 2011-10-13 | Underwater operating device for locking nuclear fuel component skeleton nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202307171U true CN202307171U (en) | 2012-07-04 |
Family
ID=46376016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203893630U Expired - Lifetime CN202307171U (en) | 2011-10-13 | 2011-10-13 | Underwater operating device for locking nuclear fuel component skeleton nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202307171U (en) |
-
2011
- 2011-10-13 CN CN2011203893630U patent/CN202307171U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
|
| CX01 | Expiry of patent term |