CN215450924U - A parcel guard shield for radiation protection of pressure vessel bolt stretcher - Google Patents
A parcel guard shield for radiation protection of pressure vessel bolt stretcher Download PDFInfo
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- CN215450924U CN215450924U CN202121410405.4U CN202121410405U CN215450924U CN 215450924 U CN215450924 U CN 215450924U CN 202121410405 U CN202121410405 U CN 202121410405U CN 215450924 U CN215450924 U CN 215450924U
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- protective cover
- cover body
- pressure vessel
- radiation protection
- vessel bolt
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Abstract
The utility model relates to the technical field of equipment transportation protection wrapping, and particularly discloses a wrapping shield for radiation protection of a pressure vessel bolt stretcher, wherein a protective shield body is of a cylindrical structure, has a downward opening and is buckled on a protective bottom surface; a top opening is formed in the center of the top surface of the protective cover body, so that a hanging strip of a pressure container bolt stretcher can conveniently penetrate through the protective cover body; a top sling is also arranged at the center of the top surface of the protective cover body and used for lifting the protective cover body; a side door is arranged at the lower part of the side wall of the protective cover body. The wrapping shield is light in weight, can be used for rapidly wrapping the pressure container bolt stretcher, and reduces the number of wrapping personnel and the time for wrapping, cutting and adhering plastic cloth by using an adhesive tape in the past.
Description
Technical Field
The utility model belongs to the technical field of equipment transportation protection wrapping, and particularly relates to a wrapping shield for radiation protection of a pressure vessel bolt stretcher.
Background
The pressure vessel belongs to nuclear power station nuclear primary equipment, and is one of three major equipment of a nuclear power station. The pressure vessel is loaded with nuclear fuel and must be opened and closed each time the nuclear fuel is replaced for overhaul.
At present, most of nuclear power plant switch pressure vessels in China adopt a bolt stretcher to stretch all bolts integrally, a self-contained ladder stand is installed at a fixed position of an outer ring of the bolt stretcher of the pressure vessel, and an operator enters and exits an inner ring of the stretcher through the self-contained ladder stand to connect hanging strips. The diameter of the bolt stretcher of the current M310 unit pressure vessel exceeds 4 meters. Because the space in the nuclear island is limited, and the environmental dose is higher, the bolt stretcher is daily stored in the AC factory building, the stretcher is wrapped and transported to the RX factory building before the pressure container is opened, and the bolt stretcher and the bolts need to be transported to the AC factory building for cleaning after the pressure container is opened. And after the nuclear fuel is replaced, the bolt stretcher is transported to an RX workshop before the pressure container is closed, and the bolt stretcher is transported to an AC workshop for storage and maintenance after the cover is closed. Therefore, the pressure vessel bolt stretcher needs to be transported to and fro between the AC plant and the RX plant 4 times each time, and 8 times for ten-year overhaul.
Because of bolt stretcher and pressure vessel direct contact, it has some radioactivity to pollute to be difficult to avoid, in order to prevent that radioactive dust from leaking and bolt stretcher by drenching, need use disposable red plastic skin to carry out whole parcel to the stretcher before transporting at every turn. After the red plastic skins are used, radioactive decontamination cost is high, and the red plastic skins are generally subjected to compressed waste treatment, so that the waste of radiation protection materials is caused in each transportation, and a large amount of radioactive waste needs to be compressed.
It is therefore desirable to design a containment shield for radiation protection of a pressure vessel bolt tensioner to address the above problems.
Disclosure of Invention
The utility model aims to provide a wrapping shield for radiation protection of a pressure vessel bolt stretcher, which can be repeatedly used, can save a large amount of radiation protection materials and radioactive waste treatment cost for each overhaul, and can also effectively reduce the labor and time cost of radiation protection wrapping.
The technical scheme of the utility model is as follows:
a wrapping shield for radiation protection of a pressure vessel bolt stretcher comprises a shield body and a protection bottom surface;
the protective cover body is of a cylindrical structure, has a downward opening and is buckled on the protective bottom surface;
a top opening is formed in the center of the top surface of the protective cover body, so that a hanging strip of a bolt stretcher for the pressure container can conveniently penetrate through the protective cover body;
and a side door is arranged at the lower part of the side wall of the protective cover body.
And a top sling is also arranged at the center of the top surface of the protective cover body and used for lifting the protective cover body.
The upper part of the side wall of the protective cover body is provided with a circle of side wall sling, and the side wall sling can be used for assisting in hoisting when the hoisting height of the crane is insufficient.
And the top opening and the side door of the protective cover body are respectively sewn by adopting materials of multiple protective cover bodies for reinforcement.
And a magic tape is arranged at the joint of the protective cover body and the protective bottom surface.
And sewing the lower edge of the protective cover body along the turned edge, inserting a drawstring into the turned edge, and pulling and fastening the drawstring when the protective cover body is required to be wrapped outside the pressure container bolt stretcher.
And a circle of drawstring is arranged at the opening at the top part for contraction and sealing.
The side door use the magic subsides reliably to seal.
When the pressure vessel bolt stretcher is used, the pressure vessel bolt stretcher is arranged on the protective bottom surface, the protective cover body covers the upper part of the pressure vessel bolt stretcher and is buckled on the protective bottom surface, and the hanging strip penetrates through the top opening and is respectively connected with the pressure vessel bolt stretcher and a crane outside the protective cover body.
The utility model has the beneficial effects that:
(1) the wrapping shield is light in weight, can be used for quickly wrapping a pressure container bolt stretcher, can be used by operating a crane by one person and matching with one person, and reduces the number of wrapping personnel and the time for wrapping, cutting and sticking plastic cloth by using an adhesive tape in the prior art;
(2) the wrapping shield can be reused and is easy to decontaminate; after the package is finished, the package can be quickly taken down by loosening the drawstring, and decontamination is carried out, so that the time for removing the package and the time and cost for putting, transferring and compressing radioactive wastes in the past are reduced;
(3) the wrapping shield has reference significance for radioactive wrapping of large-scale equipment in other radiation control areas, and is high in expandability.
Drawings
Fig. 1 is a schematic view of a wrap shield.
In the figure: 1-top sling; 2-top opening; 3-side wall straps; 4-a protective mask body; 5-side door; 6-protective bottom surface.
Detailed Description
The utility model is described in further detail below with reference to the figures and the embodiments.
The wrapping shield for radiation protection of the pressure vessel bolt stretcher shown in fig. 1 comprises a top sling 1, a top opening 2, a side wall sling 3, a shield body 4, a side door 5 and a protective bottom surface 6.
The protective cover body 4 is of a cylindrical structure, has a downward opening and is buckled on the protective bottom surface 6.
The junction of the protective cover body 4 and the protective bottom surface 6 is provided with a magic tape for sealing and connecting the protective cover body 4 and the protective bottom surface 6.
And sewing the lower edge of the protective cover body 4 along the turned edge, inserting a drawstring into the turned edge, and pulling and fastening the drawstring when the protective cover body 4 is required to be wrapped outside the pressure vessel bolt stretcher.
The top surface center position of the protective cover body 4 is provided with a top opening 2, so that a hanging strip of the bolt stretcher can conveniently pass through the top opening 2, and a circle of drawstring is arranged at the top opening 2 for contraction sealing.
And a top sling 1 is also arranged at the center of the top surface of the protective cover body 4 and used for lifting the protective cover body 4. The upper part of the side wall of the protective cover body 4 is provided with a circle of side wall sling 3, and the auxiliary hoisting is used when the hoisting height of the crane is insufficient.
The side door 5 is arranged on the lower portion of the side wall of the protective cover body 4, and the protective cover is reliably sealed by using a magic tape and used for an operator to go in and out of the hanging sling. After the protecting cover body 4 is sleeved in the pressure vessel bolt stretcher, an operator can climb from the belt crawling ladder to enter the inner ring of the pressure vessel bolt stretcher by opening the side door 5, and the side door 5 can be closed by using the magic tape after the operator exits.
The top opening 2 and the side door 5 of the protective cover body 4 are respectively sewn by three layers of protective cover body 4 materials for reinforcement, and the width of the reinforcement position is 5 cm.
When in use, the utility model is used,
the method comprises the following steps: flatly placing the protective bottom surface (6) on a flat car for transporting a pressure container bolt stretcher, and spreading the protective bottom surface;
step two: the pressure vessel bolt stretcher is lifted to the protective bottom surface (6), centered and leveled, and the connection between the hanging strip and a crane is released;
step three: the protective cover body (3) is hung above the pressure vessel bolt stretcher to be covered and leveled;
step four: opening a side door (5), enabling personnel to enter a protective cover body (3) from the side door (5), entering an inner ring of a pressure vessel bolt stretcher along a ladder stand, enabling a hanging strip to penetrate through a top opening (2) to be respectively connected with the pressure vessel bolt stretcher and a crane outside the protective cover body (3), drawing a rope of the top opening (2) to be tensioned, enabling the personnel to climb down from the ladder stand, and sticking the side door (5) by using a magic tape;
step five: the protective cover body (3) and the protective bottom surface (6) are well stuck by magic tapes, and the upper and lower closing-up parts are tightened by a draw rope;
step six: the pressure vessel bolt stretcher begins to be transported.
Claims (9)
1. The utility model provides a parcel guard shield for radiation protection of pressure vessel bolt stretcher which characterized in that: comprises a protective cover body (4) and a protective bottom surface (6);
the protective cover body (4) is of a cylindrical structure, has a downward opening and is buckled on the protective bottom surface (6);
a top opening (2) is formed in the center of the top surface of the protective cover body (4), so that a hanging strip of a pressure vessel bolt stretcher can conveniently penetrate through the protective cover body;
a side door (5) is arranged at the lower part of the side wall of the protective cover body (4).
2. The containment shield for radiation protection of a pressure vessel bolt tensioner as claimed in claim 1, wherein: the top surface center position of the protective cover body (4) is also provided with a top sling (1) for hoisting the protective cover body (4).
3. The containment shield for radiation protection of a pressure vessel bolt tensioner as claimed in claim 1, wherein: the upper part of the side wall of the protective cover body (4) is provided with a circle of side wall hanging strip (3) which is used for assisting in hoisting when the hoisting height of the crane is insufficient.
4. The containment shield for radiation protection of a pressure vessel bolt tensioner as claimed in claim 1, wherein: the top opening (2) and the side door (5) of the protective cover body (4) are respectively sewn and reinforced by adopting materials of a plurality of layers of protective cover bodies (4).
5. The containment shield for radiation protection of a pressure vessel bolt tensioner as claimed in claim 1, wherein: the connecting part of the protective cover body (4) and the protective bottom surface (6) is provided with a magic tape.
6. The containment shield for radiation protection of a pressure vessel bolt tensioner as claimed in claim 1, wherein: and sewing the lower edge of the protective cover body (4) along the turned edge, inserting a drawstring into the turned edge, and pulling and fastening the drawstring when the protective cover body (4) is required to be wrapped outside the pressure vessel bolt stretcher.
7. The containment shield for radiation protection of a pressure vessel bolt tensioner as claimed in claim 1, wherein: a circle of drawstring is arranged at the top opening (2) for contraction and sealing.
8. The containment shield for radiation protection of a pressure vessel bolt tensioner as claimed in claim 1, wherein: the side door (5) is reliably closed by using a magic tape.
9. The wrapping shield for radiation protection of a bolt stretcher for pressure vessels according to any one of claims 1 to 8, wherein: when the pressure vessel bolt stretching machine is used, the pressure vessel bolt stretching machine is arranged on the protective bottom surface (6), the protective cover body (4) covers the upper portion of the pressure vessel bolt stretching machine and is buckled on the protective bottom surface (6), and the hanging strip penetrates through the top opening (2) and is respectively connected with the pressure vessel bolt stretching machine and a crane outside the protective cover body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121410405.4U CN215450924U (en) | 2021-06-24 | 2021-06-24 | A parcel guard shield for radiation protection of pressure vessel bolt stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121410405.4U CN215450924U (en) | 2021-06-24 | 2021-06-24 | A parcel guard shield for radiation protection of pressure vessel bolt stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215450924U true CN215450924U (en) | 2022-01-07 |
Family
ID=79712912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121410405.4U Active CN215450924U (en) | 2021-06-24 | 2021-06-24 | A parcel guard shield for radiation protection of pressure vessel bolt stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215450924U (en) |
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2021
- 2021-06-24 CN CN202121410405.4U patent/CN215450924U/en active Active
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