CN212161304U - Reactor pressure-resistant shell automatically regulated grinder - Google Patents
Reactor pressure-resistant shell automatically regulated grinder Download PDFInfo
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- CN212161304U CN212161304U CN202020457780.3U CN202020457780U CN212161304U CN 212161304 U CN212161304 U CN 212161304U CN 202020457780 U CN202020457780 U CN 202020457780U CN 212161304 U CN212161304 U CN 212161304U
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- grinding
- reactor pressure
- automatic adjusting
- pressure shell
- grinding device
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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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- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The utility model belongs to nuclear power station reactor overhauls the field, concretely relates to withstand voltage casing automatically regulated grinder of reactor, this grinder include loading board, guide vane, bolt, bracing piece, handle, set nut, grinding body, joint bearing, uide bushing, spring and nut, and grinder is central symmetrical structure. This grinder connects with the welding form more, and the finding wraps up in the device is inside more, and the outside has reliable sealed, has reduced the risk that the foreign matter dropped from the design, has improved work efficiency, has shortened operating time, has reduced personnel and has received the irradiation dose, has improved the grinding quality, reduces to appear grinding inhomogeneous and the condemned possibility of withstand voltage casing that leads to from the technology, and improve equipment's usability has laid good basis for this type of work in the overhaul of the past in the future.
Description
Technical Field
The utility model belongs to nuclear power station reactor overhauls the field, concretely relates to withstand voltage casing automatically regulated grinder of reactor.
Background
The control rod drive mechanism is an important component of the reactor core, is mainly used for moving the control rod up and down and fixing the control rod at the uppermost and lowermost positions or a certain middle position, can determine the position information of the control rod through a position indicator, and can realize power starting, power control and shutdown through inserting or extracting the control rod from the core by using the control rod drive mechanism. The upper assembly has a total of 103 sets of control rod drive mechanisms, and the pressure shell is a flanged sleeve made of stainless steel and used for accommodating the inner and outer parts of the control rod drive mechanisms to ensure that the control rod drive mechanisms work under the parameters of a primary loop. The flange at the lower part of the pressure-bearing shell is connected with a control rod driving mechanism connecting pipe on the top cover of the reactor; the upper part forms a closed pressure-resistant shell through an end plug. The sealing of the end plug is achieved by means of a sealing gasket. The pressure bearing device is used as a primary loop sealing pressure boundary, needs to bear the operating pressure of 15.7MPa and the hydrostatic test pressure of 24.5MPa, and belongs to key sealing.
In the case of a position indicator seal, according to the program requirements: wiping the sealing surface of the pressure shell by white cotton cloth dipped with alcohol; visually checking a sealing surface formed by matching the pressure-resistant shell and the position indicator by using a highlight lamp, wherein the sealing surface cannot have indentation, protrusion, metal tumor, graphite gasket residue and other damages; the scratches at the sealing surface are not allowed to exceed 0.1 mm. If it exceeds 0.1mm, it is treated according to a separate scheme, such as treatment with a combination file and sandpaper if a defect is found at the non-sealing face.
When the unit is maintained in a cold shutdown state, the inner wall of the pressure-resistant shell is sealed and scratched when the position indicator is detached from the pressure-resistant shell due to the reasons of personnel operation, size processing defects of equipment, environmental influence and the like. When the position indicator is mounted to the pressure-resistant casing, the position indicator cannot be mounted to a designed position, and the mounting requirements cannot be met. Through measurement and comparison, the sealing position of the pressure-resistant shell needs to be reasonably ground. In the prior art, only local simple treatment is carried out on the defects of the sealing surface of the pressure-resistant shell, the technical requirements cannot be met by full circumferential treatment, and the prior treatment technology is greatly limited by the manual level, so that the defects of equipment are easily expanded, and the time, labor and labor are wasted.
Therefore, a reactor pressure shell automatic adjusting and grinding device which is simple and convenient to operate and can automatically center is needed to solve the technical problem.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is to sealed defective pressure-resistant casing of face, provides a reactor pressure-resistant casing automatically regulated grinder, handles sealed face and adjustable, can improve work efficiency, reduces the human input, reduces and receives the irradiation dose, solves among the prior art simultaneously centering, the unstable technical problem of grinding dynamics.
The technical scheme of the utility model is that:
the utility model provides a withstand voltage casing automatically regulated grinder of reactor, the device uses the center of loading board to set up as the central axis symmetry, including the loading board, the guide vane, the bolt, the bracing piece, the handle, set nut, the grinding body, joint bearing, the uide bushing, spring and nut, fixing bolt and grinding body pass through nut fixed connection, joint bearing one end and grinding body are connected, the other end is connected with the guide vane, the loading board is passed through to the uide bushing, the outstanding border embedding uide bushing of uide bushing passes through in the groove, the loading board is connected with the bracing piece, through spring coupling between two joint bearings, the bracing piece is connected with the handle.
The bearing plate is connected with the supporting rod in a welding mode, and the supporting rod is connected with the handle in a welding mode.
The guide sleeve and the bearing plate are fastened through a positioning nut.
The extending end parts on two sides of the guide sleeve are connected with two positioning nuts.
The guide sleeve is cylindrical, is externally provided with threads, and is provided with symmetrical through grooves at two ends.
The inner hole of the guide sheet is a threaded hole.
The diameter of the outer edge of the grinding blank is consistent with the inner diameter of the pressure-resistant shell to be ground.
The joint bearing head is connected by a ball.
The spring is a compression spring.
The utility model discloses following beneficial effect has:
(1) the design of the utility model reduces the manpower input, and two people can finish the treatment of the defects, thereby improving the working efficiency;
(2) the utility model provides a design of this grinder connects with the welding form more, and the finding wraps up in the device inside more, and the outside has reliable sealedly, has reduced the risk that the foreign matter dropped in the design. Due to the technical irregularity of operators, the condition of over-grinding or under-grinding can be caused, and the equipment is scrapped. The device has solved dynamics unstability from the design, has reduced because of the error, has improved work efficiency, has shortened operating time, has reduced personnel and has received the exposure dose.
(3) The utility model reduces the number of workers, improves the grinding efficiency of the sealing surface, shortens the working hours and reduces the irradiated dose;
(4) the device of the utility model has self-adapting adjusting function, uniform circumferential grinding, improved grinding quality, technically reduced possibility of scrapping of the pressure shell caused by uneven grinding, and improved equipment availability;
(5) the utility model discloses a device is easy and simple to handle, and automatic centering has solved centering, grinding dynamics unstability scheduling problem from the technique, has reduced because of the restriction of personnel operation level causes the possibility of unable completion work, has laid good basis for this type of work in the calendar overhaul in the future.
Drawings
Fig. 1 is a front view of an automatic adjusting and grinding device for a pressure shell of a reactor provided by the present invention;
fig. 2 is a side view of an automatic adjusting and grinding device for a pressure shell of a reactor provided by the present invention;
FIG. 3 is a cross-sectional view of an automatic adjusting grinding device A-A for a pressure shell of a reactor according to the present invention;
FIG. 4 is a sectional view of a B-B automatic adjusting and grinding device for a pressure shell of a reactor provided by the present invention;
wherein: 1-bearing plate, 2-guide piece, 3-bolt, 4-support rod, 5-handle, 6-positioning nut, 7-grinding blank, 8-joint bearing, 9-guide sleeve, 10-spring and 11-nut
Detailed Description
The technology of the present invention is further described below:
as shown in fig. 1, 2, 3 and 4, the utility model provides a pair of reactor pressure shell automatically regulated grinder, this grinder use the center of loading board 1 to set up as the central axis symmetry, including a loading board 1, two direction pieces 2, two bolts 3, two bracing pieces 4, a handle 5, four set nut 6, two grinding base bodies 7, two joint bearing 8, a uide bushing 9, a spring 1 and two nuts 11.
The guide sleeve 9 is cylindrical, is externally provided with threads, and is provided with symmetrical through grooves at two ends.
The inner hole of the guide sheet 2 is a threaded hole and is in threaded connection with the joint bearing 8.
A limited gap is formed between the two positioning nuts 6 on the same side, and the protruding edge of the guide sheet 2 is limited between the two positioning nuts 6 to play a limiting role.
The spring 10 is a compression spring providing a radial force to the device.
The diameter of the outer edge of the grinding blank 7 is consistent with the inner diameter of the pressure-resistant shell to be ground, and the head of the joint bearing 8 is in ball connection, so that the automatic fit of the grinding blank 7 and the pressure-resistant shell is guaranteed.
The bolt 3 is connected with the grinding green bodies 7 in a threaded connection mode, the bolt 3 is fastened in a loosening-preventing mode through the nut 11, and the bolt 3 serves as a handle when the grinding device is installed and compresses the two grinding green bodies 7 to prevent longitudinal scratches on the pressure-resistant shell.
After the grinding device is debugged on the pressure-resistant shell simulation piece, the threaded connection part of the grinding device can be subjected to electric welding treatment as required, so that loosening is prevented, and the purpose of preventing foreign bodies is achieved.
The automatic adjusting and grinding device for the pressure shell of the reactor comprises the following operation steps in use: compressing the two grinding blanks 7 to be smaller than the inner diameter of the pressure shell through the bolts 3, adhering grinding sand paper or other grinding media to the cambered surfaces of the grinding blanks 7, installing and matching a grinding device on the pressure shell with defects, and carrying out grinding work clockwise or anticlockwise according to actual conditions until the inner diameter of the pressure shell meets the use requirement.
In the original working mode, only sand paper is used or the blank 7 is ground by using machining, the ground blank 7 is of a fixed size, the inner diameter of the ground blank is slightly smaller than that of the pressure shell, the pressure shell with defects can be only partially ground excessively, and compared with the original design, the sealing effect is reduced to a certain extent. The pressure-resistant shell is original factory nuclear primary equipment, and the manufacturing cost, the inspection cost and the transportation cost are high. The use of this device has solved grinding off-centre from the technique, dynamics control unstability scheduling problem, has improved greatly and has ground the qualification rate, has reduceed the disability rate of withstand voltage casing indirectly, and more in addition, withstand voltage casing seals as a return circuit sealed boundary, and quick effectual defect is handled, avoids overhaul thread delay, and potential economic benefits is great. This grinder's design is connected with the welding form more, and the finding wraps up in the device is inside more, and the outside has reliable sealedly, has reduced the risk that the foreign matter dropped in the design. Due to the technical irregularity of operators, the condition of over-grinding or under-grinding can be caused, and the equipment is scrapped. The device has solved dynamics unstability from the design, has reduced because of the error, has improved work efficiency, has shortened operating time, has reduced personnel and has received the exposure dose.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The present invention can adopt the prior art for the content which is not described in detail in the present invention.
Claims (9)
1. An automatic adjusting and grinding device for a pressure shell of a reactor is characterized in that the device is symmetrically arranged by taking the center of a bearing plate (1) as a central axis and comprises the bearing plate (1), a guide sheet (2), a bolt (3), a support rod (4), a handle (5), a positioning nut (6), a grinding green body (7), a knuckle bearing (8), a guide sleeve (9), a spring (10) and a nut (11), wherein the fixing bolt (3) and the grinding green body (7) are fixedly connected through the nut (11), one end of the knuckle bearing (8) is connected with the grinding green body (7), the other end of the knuckle bearing is connected with the guide sheet (2), the guide sleeve (9) penetrates through the bearing plate (1), the protruding edge of the guide sheet (2) is embedded into a through groove of the guide sleeve (9), the bearing plate (1) is connected with the support rod (4), and the two knuckle bearings (8) are connected through the spring, the support rod (4) is connected with the handle (5).
2. The reactor pressure shell automatic adjusting grinding device of claim 1, characterized in that: the bearing plate (1) is connected with the support rod (4) in a welding mode, and the support rod (4) is connected with the handle (5) in a welding mode.
3. The reactor pressure shell automatic adjusting grinding device of claim 2, characterized in that: the guide sleeve (9) and the bearing plate (1) are fastened through a positioning nut (6).
4. The reactor pressure shell automatic adjusting and grinding device of claim 3, characterized in that: the extending end parts at two sides of the guide sleeve (9) are connected with the two positioning nuts (6).
5. The reactor pressure shell automatic adjusting grinding device of claim 4, characterized in that: the guide sleeve (9) is cylindrical, is externally provided with threads, and is provided with symmetrical through grooves at two ends.
6. The reactor pressure shell automatic adjusting grinding device of claim 5, characterized in that: the inner hole of the guide sheet (2) is a threaded hole.
7. The reactor pressure shell automatic adjusting grinding device of claim 6, characterized in that: the diameter of the outer edge of the grinding blank (7) is consistent with the inner diameter of the pressure-resistant shell to be ground.
8. The reactor pressure shell automatic adjusting grinding device of claim 7, characterized in that: the head of the joint bearing (8) is in ball connection.
9. The reactor pressure shell automatic adjusting grinding device of claim 8, characterized in that: the spring (10) is a compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457780.3U CN212161304U (en) | 2020-04-01 | 2020-04-01 | Reactor pressure-resistant shell automatically regulated grinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020457780.3U CN212161304U (en) | 2020-04-01 | 2020-04-01 | Reactor pressure-resistant shell automatically regulated grinder |
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| CN212161304U true CN212161304U (en) | 2020-12-15 |
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| CN202020457780.3U Active CN212161304U (en) | 2020-04-01 | 2020-04-01 | Reactor pressure-resistant shell automatically regulated grinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112676947A (en) * | 2020-12-28 | 2021-04-20 | 王兆举 | Automatic workpiece shaft butt-joint positioning mechanism for intelligent plane refiner |
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2020
- 2020-04-01 CN CN202020457780.3U patent/CN212161304U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112676947A (en) * | 2020-12-28 | 2021-04-20 | 王兆举 | Automatic workpiece shaft butt-joint positioning mechanism for intelligent plane refiner |
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