CN212647891U - Pressure vessel top cover and in-pile component guiding device - Google Patents
Pressure vessel top cover and in-pile component guiding device Download PDFInfo
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- CN212647891U CN212647891U CN202020547973.8U CN202020547973U CN212647891U CN 212647891 U CN212647891 U CN 212647891U CN 202020547973 U CN202020547973 U CN 202020547973U CN 212647891 U CN212647891 U CN 212647891U
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- telescopic head
- bolt hole
- guide rod
- pressure vessel
- fastening bolt
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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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Abstract
The utility model provides a pressure vessel top cap and pile internals guider, including flexible head, holding screw and guide bar. Wherein the telescopic head is connected with the guide rod through a set screw. The telescopic head is provided with a long groove, a short groove, a wrench hole, a tightening bolt hole on the telescopic head and a tightening bolt hole under the telescopic head. The guide rod is provided with a long conical column, a short conical column, a guide rod lower fastening bolt hole and a guide rod upper fastening bolt hole. The guide device has two states: 1) the original state is as follows: the fastening screw penetrates through the fastening bolt hole in the telescopic head and the fastening bolt hole in the guide rod at the same time, so that the guide rod is connected with the telescopic head. 2) An elongation state: the fastening screw penetrates through the lower fastening bolt hole of the guide rod and the lower fastening screw hole of the telescopic head simultaneously, so that the guide rod is connected with the telescopic head. The utility model discloses simplify the maintenance flow, shortened pressure vessel switch lid hoist and mount time limit for a project, reduced personnel's irradiation dose.
Description
Technical Field
The utility model belongs to the technical field of mechanical overhaul, concretely relates to pressure vessel top cap and pile interior member guider.
Background
The hoisting work of the top cover and the reactor internals of the pressure vessel is the mainline work of the overhaul of the pressure vessel of the nuclear power station, and in order to ensure that the hoisting process of the large part can effectively avoid the damage of equipment caused by the contact of all easy-to-touch points, guide columns with two lengths are configured in the core overhaul at present and used for hoisting the upper reactor internals, the lower reactor internals and the top cover assembly of the pressure vessel of the reactor.
Design length 9500mm of long guide post, short guide post design length 5465mm need use short guide post when hoist and mount top cap, need use long guide post hoist and mount when hoisting the lower part and piling internal member, and whole maintenance process need replace long and short guide post cubic repeatedly, consumes a large amount of time and manpower and materials cost.
Therefore, an improved hoisting device is urgently needed to be designed, and the improved hoisting device can be used for hoisting the top cover and the lower in-pile component at the same time, is not required to be repeatedly replaced, can shorten the maintenance period of a main line, and simultaneously reduces the radiation dose of workers.
Disclosure of Invention
The utility model aims at providing a pressure vessel top cap and pile internals guider can be used for the hoist and mount of top cap and lower part pile internals simultaneously, need not to replace repeatedly.
The utility model adopts the technical proposal that:
a pressure vessel top cover and in-pile component guiding device comprises a lifting lug, a telescopic head, a set screw and a guide rod.
The lifting lugs are arranged on the top of the pressure vessel top cover and the top of the in-pile component guide device and are in threaded connection with the telescopic head. The telescopic head is connected with the guide rod through a set screw.
The top of the telescopic head is an upper end face, and the bottom of the telescopic head is a lower end face. The distance between the upper end face and the lower end face of the telescopic head is 950 mm.
The telescopic head is provided with a long groove and a short groove. Wherein the distance between the long groove and the lower end surface of the telescopic head is 700mm, and the distance between the short groove and the lower end surface of the telescopic head is 200 mm.
The telescopic head is also provided with a wrench hole, a fastening bolt hole on the telescopic head and a fastening bolt hole under the telescopic head. Wherein, the distance between the wrench hole and the upper end surface of the telescopic head is 80 mm; the distance between a fastening bolt hole on the telescopic head and the upper end surface of the telescopic head is 150 mm; the distance between the lower fastening bolt hole of the telescopic head and the upper end face of the telescopic head is 700 mm.
The fastening screw penetrates through the fastening bolt hole under the telescopic head to be connected with the guide rod.
The top of guide bar is the up end, and the bottom is terminal surface down, and guide bar lower reference surface is close to terminal surface down, and guide bar lower reference surface is 850mm apart from the up end.
The guide rod is also provided with a long conical column and a short conical column. The distance from the top surface of the long conical column to the lower reference surface of the guide rod is 700mm, and the distance from the top surface of the short conical column to the lower reference surface of the guide rod is 200 mm.
The guide rod is also provided with a lower guide rod fastening bolt hole and an upper guide rod fastening bolt hole, wherein the distance between the lower guide rod fastening bolt hole and the lower guide rod reference surface is 750mm, and the distance between the upper guide rod fastening bolt hole and the lower guide rod reference surface is 800 mm.
Furthermore, the pressure vessel top cover and the reactor internals guiding device are also provided with a guide rod wrench for lifting the telescopic head and then pulling the telescopic head to rotate horizontally.
The length of the guide rod wrench is 400mm, and the diameter of the guide rod wrench is 20 mm. The guide rod spanner is matched with the spanner hole in size. The guide bar wrench is inserted into the wrench hole.
The nominal diameters of the fastening bolt hole on the telescopic head, the fastening bolt hole under the guide rod and the fastening bolt hole on the guide rod are all 22 mm.
The gauge of the set screw is M20 × 50.
The pressure vessel top cover and the guide device of the reactor internals are provided with two states:
1. the original state is as follows: the fastening screw penetrates through the fastening bolt hole in the telescopic head and the fastening bolt hole in the guide rod at the same time, so that the guide rod is connected with the telescopic head.
2. An elongation state: the fastening screw penetrates through the lower fastening bolt hole of the guide rod and the lower fastening bolt hole of the telescopic head simultaneously, so that the guide rod is connected with the telescopic head.
The utility model discloses the beneficial effect who gains does:
the lifting appliance is used for transportation and repeated lifting in and out in the replacement process of the long and short guide posts under different working conditions, the maintenance working flow is simplified, the lifting period of opening and closing the cover of the pressure container is shortened, and the irradiation dose of personnel is reduced.
Drawings
FIG. 1 is a schematic view of the top cover and the guide device for the internals of the pressure vessel in an extended state;
FIG. 2 is a schematic view of the original state structure of the pressure vessel top cover and the in-pile component guide device;
FIG. 3 is a schematic cross-sectional view taken along the direction A-A.
Wherein: 1 is a lifting lug; 2 is a guide bar wrench; 3 is a telescopic head; 4 is a set screw; 5 is a guide rod; 6 is a short groove; 7 is a long groove; 8 is a fastening bolt hole under the telescopic head; 9 is a fastening bolt hole on the telescopic head; 10 is a wrench hole; 11 is a lower reference surface of the guide rod; 12 is a fastening bolt hole under the guide rod; 13 is a fixing bolt hole on the guide rod; 14 is a long conical column; 15 are short tapered columns.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, the utility model provides a pressure vessel top cap and internals guider, including lug 1, flexible head 3, holding screw 4 and guide bar 5.
Wherein the lifting lug 1 is arranged on the top of the top cover of the pressure vessel and the top of the guide device of the reactor internals and is in threaded connection with the telescopic head 3. The telescopic head 3 is connected with a guide rod 5 through a set screw 4.
The top of the telescopic head 3 is an upper end face, and the bottom is a lower end face. The distance between the upper end surface and the lower end surface of the telescopic head 3 is 950 mm.
The telescopic head 3 is provided with a long groove 7 and a short groove 6. Wherein the distance between the long groove 7 and the lower end surface of the telescopic head 3 is 700mm, and the distance between the short groove 6 and the lower end surface of the telescopic head 3 is 200 mm.
The telescopic head 3 is also provided with a wrench hole 10, a fastening bolt hole 9 on the telescopic head and a fastening bolt hole 8 under the telescopic head. Wherein, the distance between the wrench hole 10 and the upper end surface of the telescopic head 3 is 80 mm; the distance between the fastening bolt hole 9 on the telescopic head and the upper end surface of the telescopic head 3 is 150 mm; the distance between the lower fastening bolt hole 8 of the telescopic head and the upper end surface of the telescopic head 3 is 700 mm.
The top of guide bar 5 is the up end, and the bottom is the lower terminal surface, and guide bar lower reference surface 11 is close to the lower terminal surface, and guide bar lower reference surface 11 is 850mm apart from the up end.
The guide bar 5 is further provided with a long tapered post 14 and a short tapered post 15. The distance from the top surface of the long tapered post 14 to the guide bar lower reference surface 11 was 700mm, and the distance from the top surface of the short tapered post 15 to the guide bar lower reference surface 11 was 200 mm.
Furthermore, the pressure vessel top cover and the reactor internals guiding device are also provided with a guide rod wrench 2 for lifting the telescopic head 3 and then pulling the telescopic head 3 to rotate horizontally.
The guide bar wrench 2 has a length of 400mm and a diameter of 20 mm. The guide bar wrench 2 is matched to the size of the wrench hole 10. The guide bar wrench 2 is inserted into the wrench hole 10.
The nominal diameters of the telescopic head upper fastening bolt hole 9, the telescopic head lower fastening bolt hole 8, the guide rod lower fastening bolt hole 12 and the guide rod upper fastening bolt hole 13 are all 22 mm.
The set screw 4 has a specification of M20 × 50.
The pressure vessel top cover and the reactor internals guiding device have two states:
1. the original state is as follows: the set screw 4 passes through both the set bolt hole 9 on the telescopic head and the set bolt hole 13 on the guide rod, thereby connecting the guide rod 5 with the telescopic head 3.
2. An elongation state: the set screw 4 simultaneously passes through the guide rod lower set bolt hole 12 and the telescopic head lower set bolt hole 8, so that the guide rod 5 is connected with the telescopic head 3.
Use the utility model provides a pressure vessel top cap and pile interior member guider carry out the step of hoist and mount as follows:
step 1: when the reactor top cover assembly is hoisted, the pressure vessel top cover and the reactor internals guiding device in the original state are used:
a) checking to ensure that the short groove 6 of the telescopic head 3 is attached to the short conical column 15 of the guide rod 5;
b) the check ensures that the set screw 4 has been fully screwed into the set screw hole 9 on the telescopic head and the set screw hole 13 on the guide rod.
Step 2: hoisting the upper reactor internals to continue using the pressure vessel top cover and the reactor internals guiding device in the original state;
and step 3: hoisting the lower reactor internals by using the pressure vessel top cover in an extended state and the reactor internals guiding device:
a) disassembling the set screw 4;
b) lifting the lifting lug 1 to enable the lower end face of the telescopic head 3 to be 20-130mm higher than the plane where the long conical column 14 of the guide rod is located;
c) a wrench 2 is inserted into a wrench hole 10 of the telescopic head 3 and horizontally rotated clockwise or anticlockwise for 45 degrees;
d) dropping the lifting lug 1 to ensure that the short groove 6 of the telescopic head 3 is attached to the long conical column 14 of the guide rod 5;
e) and installing a set screw 4 to fix a lower set bolt hole 8 of the telescopic head and a lower set bolt hole 12 of the guide rod.
And 4, step 4: the lower reactor internals are reloaded to continue using the pressure vessel top cover and the reactor internals guiding device in the extended state:
a) checking to ensure that the short groove 6 of the telescopic head 3 is attached to the long conical column 14 of the guide rod 5;
b) ensuring that the set screw 4 has been fully screwed into the telescoping head lower set bolt hole 8 and the guide rod lower set bolt hole 12.
And 5: the reloading of the upper internals uses the pressure vessel top cover and internals guiding device in the original state:
a) disassembling the set screw 4;
b) lifting the lifting lug 1 to enable the lower end face of the telescopic head 3 to be 20-130mm higher than the plane of the long conical column 14 of the guide rod;
c) the guide rod wrench 2 is inserted into a wrench hole 10 of the telescopic head 3, and the wrench is horizontally rotated by 45 degrees clockwise or anticlockwise;
d) the lifting lug 1 is dropped to ensure that the short groove 6 of the telescopic head 3 is attached to the short conical column 15 of the guide rod 5, and the long groove 7 of the telescopic head 3 is attached to the long conical column 14 of the guide rod 5;
e) the fastening bolt 4 is installed to fix the fastening bolt hole 9 on the telescopic head and the fastening bolt hole 13 on the guide rod.
Step 6: the pressure vessel top cover assembly is reinstalled, and the pressure vessel top cover and the in-pile component guiding device in the original state are continuously used:
a) checking to ensure that the short groove 6 of the telescopic head 3 is attached to the short conical column 15 of the guide rod 5;
b) checking to ensure that the long groove 7 of the telescopic head 3 is attached to the long conical column 14 of the guide rod 5;
the check ensures that the set screw 4 has been fully screwed into the set screw hole 9 on the telescopic head and the set screw hole 13 on the guide rod.
The utility model discloses the beneficial effect who gains does:
the lifting appliance is used for transportation and repeated lifting in and out in the replacement process of the long and short guide posts under different working conditions, the maintenance working flow is simplified, the lifting period of opening and closing the cover of the pressure container is shortened, and the irradiation dose of personnel is reduced.
Claims (10)
1. The utility model provides a pressure vessel top cap and pile internals guider which characterized in that: the lifting lug (1) is arranged at the top of a pressure vessel top cover and a reactor internals guiding device and is in threaded connection with the telescopic head (3), and the telescopic head (3) is connected with the guide rod (5) through the set screw (4).
2. The pressure vessel top cover and internals guide device according to claim 1, wherein: the telescopic head is characterized in that the top of the telescopic head (3) is an upper end face, the bottom of the telescopic head is a lower end face, the distance between the upper end face and the lower end face of the telescopic head (3) is 950mm, the telescopic head (3) is further provided with a long groove (7) and a short groove (6), the distance between the long groove (7) and the lower end face of the telescopic head (3) is 700mm, and the distance between the short groove (6) and the lower end face of the telescopic head (3) is 200 mm.
3. The pressure vessel top cover and internals guide device according to claim 2, wherein: the telescopic head (3) is also provided with a wrench hole (10), a fastening bolt hole (9) on the telescopic head and a fastening bolt hole (8) under the telescopic head; wherein the distance between the wrench hole (10) and the upper end surface of the telescopic head (3) is 80 mm; the distance between the fastening bolt hole (9) on the telescopic head and the upper end surface of the telescopic head (3) is 150 mm; the distance between the lower fastening bolt hole (8) of the telescopic head and the upper end face of the telescopic head (3) is 700 mm.
4. The pressure vessel top cover and internals guide device according to claim 3, wherein: the top of guide bar (5) is the up end, and the bottom is terminal surface down, and guide bar lower reference surface (11) is close to terminal surface down, and guide bar lower reference surface (11) is 850mm apart from the up end.
5. The pressure vessel top cap and internals guide device according to claim 4, wherein: the guide rod (5) is further provided with a long conical column (14) and a short conical column (15), the distance from the top surface of the long conical column (14) to the lower guide rod reference surface (11) is 700mm, and the distance from the top surface of the short conical column (15) to the lower guide rod reference surface (11) is 200 mm.
6. The pressure vessel top cap and internals guide device according to claim 4, wherein: guide bar (5) still are equipped with tight bolt hole (12) under the guide bar and tight bolt hole (13) on the guide bar, and wherein tight bolt hole (12) is 750mm apart from guide bar lower reference surface (11)'s distance under the guide bar, and guide bar upper setting bolt hole (13) is 800mm apart from guide bar lower reference surface (11)'s distance.
7. The pressure vessel top cover and internals guide device according to claim 3, wherein: pressure vessel top cap and pile interior component guider still are provided with guide bar spanner (2), and guide bar spanner (2) length is 400mm, and the diameter is 20mm, and guide bar spanner (2) cooperate with the size of spanner hole (10), and guide bar spanner (2) insert in spanner hole (10).
8. The pressure vessel top cap and internals guide device according to claim 6, wherein: the nominal diameters of the upper telescopic head fastening bolt hole (9), the lower telescopic head fastening bolt hole (8), the lower guide rod fastening bolt hole (12) and the upper guide rod fastening bolt hole (13) are all 22 mm.
9. The pressure vessel top cover and internals guide device according to claim 1, wherein: the specification of the set screw (4) is M20 multiplied by 50.
10. The pressure vessel top cap and internals guide device according to claim 6, wherein: the pressure vessel top cover and in-pile component guide device has two states, 1) an original state: the fastening screw (4) simultaneously passes through a fastening bolt hole (9) on the telescopic head and a fastening bolt hole (13) on the guide rod, so that the guide rod (5) is connected with the telescopic head (3); 2) an elongation state: the fastening screw (4) simultaneously passes through the lower fastening bolt hole (12) of the guide rod and the lower fastening bolt hole (8) of the telescopic head, so that the guide rod (5) is connected with the telescopic head (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020547973.8U CN212647891U (en) | 2020-04-14 | 2020-04-14 | Pressure vessel top cover and in-pile component guiding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020547973.8U CN212647891U (en) | 2020-04-14 | 2020-04-14 | Pressure vessel top cover and in-pile component guiding device |
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| Publication Number | Publication Date |
|---|---|
| CN212647891U true CN212647891U (en) | 2021-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020547973.8U Active CN212647891U (en) | 2020-04-14 | 2020-04-14 | Pressure vessel top cover and in-pile component guiding device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477371A (en) * | 2020-04-14 | 2020-07-31 | 福建福清核电有限公司 | Guiding device and hoisting method for pressure vessel top cover and reactor internals |
| CN115083639A (en) * | 2022-06-28 | 2022-09-20 | 上海核工程研究设计院有限公司 | Height-switchable nuclear power plant pressure vessel guide bolt device and hoisting method |
-
2020
- 2020-04-14 CN CN202020547973.8U patent/CN212647891U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111477371A (en) * | 2020-04-14 | 2020-07-31 | 福建福清核电有限公司 | Guiding device and hoisting method for pressure vessel top cover and reactor internals |
| CN111477371B (en) * | 2020-04-14 | 2025-04-11 | 福建福清核电有限公司 | A pressure vessel top cover and internal component guide device and hoisting method |
| CN115083639A (en) * | 2022-06-28 | 2022-09-20 | 上海核工程研究设计院有限公司 | Height-switchable nuclear power plant pressure vessel guide bolt device and hoisting method |
| CN115083639B (en) * | 2022-06-28 | 2024-06-07 | 上海核工程研究设计院股份有限公司 | Nuclear power plant pressure vessel guide bolt device with switchable height and hoisting method |
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