CN215868660U - Hoisting device for position indicator - Google Patents
Hoisting device for position indicator Download PDFInfo
- Publication number
- CN215868660U CN215868660U CN202121704112.7U CN202121704112U CN215868660U CN 215868660 U CN215868660 U CN 215868660U CN 202121704112 U CN202121704112 U CN 202121704112U CN 215868660 U CN215868660 U CN 215868660U
- Authority
- CN
- China
- Prior art keywords
- position indicator
- lifting
- ring
- lead screw
- hoisting
- 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.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The utility model belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a hoisting device for a position indicator, which comprises: the device comprises a position indicator taking-out device and a position indicator hoisting device, wherein the position indicator taking-out device takes out the position indicator, and the position indicator hoisting device hoists the position indicator taken out by the position indicator taking-out device. The utility model solves the technical problems that the existing position indicator hoisting device can not hoist the position indicators at the same time, which causes long time of major repair key path, more generated solid wastes, larger irradiated collective dose of operators and easy hoisting interruption in the hoisting process.
Description
Technical Field
The utility model belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a hoisting device for a position indicator.
Background
The reactor control rod driving mechanism, the driving rod and the control rod assembly are used as an actuating mechanism of the reactor control protection system, the position indicators are used as important components of the reactor control rod driving mechanism, the number of the position indicators is 103, the position indicators are used for monitoring the positions of the driving rod and the control rod assembly, and the position indicators can provide position indication of the control rod assembly in each 20mm stroke of the reactor core. During the overhaul of the unit, the existing lifting appliance for lifting the position indicator can only lift one position indicator at a time, and the time of an overhaul critical path is required to be about 44 hours when the existing lifting device is used for lifting the position indicator; the operator receives an exposure collective dose of about 14man mSv;
when the unit runs for a fuel period, the sealing washer expands, so that the position indicator is adhered to the pressure-resistant shell, the probability of hoisting interruption is easily increased when the position indicator is hoisted, and further additional critical path time and collective dosage are increased; the operation of the position indicator by adopting the existing hoisting device needs about 150 sets of consumed paper clothes which are radioactive solid wastes and cause certain pressure on the environment;
meanwhile, in the process of hoisting the position indicator to the position indicator storage partition, the operating personnel of the reactor core need to frequently withdraw to a low-dosage waiting area and even climb a vertical ladder as high as 4m, and the physical consumption of the operating personnel is large.
Therefore, it is necessary to design a lifting device for a position indicator to solve the technical problems generated when the position indicator is lifted by using the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a hoisting device for a position indicator, aiming at the prior art and solving the technical problems that the conventional hoisting device for the position indicator cannot hoist the position indicator at the same time, so that the major repair critical path time is long, more solid wastes are generated, the irradiation collective dose of operators is large, and hoisting interruption is easy to occur in the hoisting process.
The technical scheme of the utility model is as follows:
a hoist for a position indicator, comprising: the device comprises a position indicator taking-out device and a position indicator hoisting device, wherein the position indicator taking-out device takes out the position indicator, and the position indicator hoisting device hoists the position indicator taken out by the position indicator taking-out device.
The position indicator removing device comprises: the device comprises a support frame, a screw rod A and a holding claw; the mounting through hole is formed in the center of the top of the support frame, one end of the screw rod A penetrates through the mounting through hole and is fixedly arranged at the center of the top of the support frame, the bottom of the screw rod A is fixedly provided with the holding claw, and the thread part on the screw rod A is coated with a molybdenum disulfide coating.
The hoisting device of the position indicator comprises: the lifting device comprises a plurality of lifting lugs A, a lifting beam, a plurality of lifting lugs B, a plurality of rotating rings, a plurality of position indicator connecting parts, a screw rod B and a guide groove; a plurality of lifting lugs A are welded at the top of the lifting beam at equal intervals; the surface of the hanging beam is provided with a guide groove; the lead screw B is fixedly arranged on the hanging beam.
The surface of the screw B includes: the screw thread part of the screw rod B is provided with a plurality of screw rod nuts, and the middle parts of all lifting lugs B are sleeved on the screw rod B in a surrounding manner.
The middle part of each lifting lug B is fixed on the screw rod B through a screw nut at equal intervals; the top of each lifting lug B is arranged in the guide groove, and the lower end of each lifting lug B is connected with a position indicator connecting part through a rotating ring.
And the thread part of the screw rod B is coated with a molybdenum disulfide coating.
The number of the lifting lugs A, the lifting lugs B, the rotating ring and the indicator connecting part is three, and the position indicator connecting part is integrally of a T-shaped structure.
The rotating ring includes: the upper lifting ring is connected with the connecting lifting lug B, the lower lifting ring is connected with the position indicator connecting part, the upper lifting ring and the lower lifting ring are connected through the connecting bolt and can rotate freely around the connecting bolt, and the rotating direction in the lifting process of the position indicator is achieved.
The position indicator connecting part includes: the lifting device comprises a lifting rod, a positioning ring and a plurality of connecting screws, wherein one end of the lifting rod is connected with a lower lifting ring of the rotating ring, the other end of the lifting rod is connected with the positioning ring, and the positioning ring is used for being matched and positioned with the head of the position indicator; the connecting screws are respectively arranged on two symmetrical sides of the positioning ring and are used for being connected with the hanging holes in the head of the position indicator.
The number of the connecting screws is two.
The utility model has the beneficial effects that:
1) the position indicator hoisting device designed by the utility model can hoist 3 position indicator devices simultaneously, the time of major repair critical paths is saved by about 20 hours, the time is converted into electricity generation amount, about 800 ten thousand of income can be created by single major repair of a single unit, and about 10 hundred million yuan can be created by 4 units in the service life of the unit;
2) the hoisting device of the position indicator designed by the utility model can reduce the irradiated collective dose of single overhaul operators by about 8man mSv;
3) the device for taking out the position indicator can eliminate the possibility of adhesion between the position indicator and the pressure-resistant shell before hoisting the position indicator, thereby avoiding the occurrence of hoisting interruption accidents and avoiding rework operation;
4) by adopting the hanging device and the hanging method of the position indicator, the operation time is reduced, the number of operation workers is reduced, about 100 sets of radioactive paper clothes can be saved, and the environmental pressure is reduced;
5) the hoisting device and the hoisting method of the position indicator can reduce the hoisting times of 2/3, and in the process of hoisting the position indicator to the position indicator storage shelf, operators can reduce the evacuation or climbing times of a large number of vertical ladders evacuated to a low-dose waiting area and even climbing up to 4m, thereby saving the physical ability of a large number of operators.
Drawings
FIG. 1 is a schematic structural view of a position indicator lifting device according to the present invention;
fig. 2 is a schematic structural view of the position indicator removing device according to the present invention.
Wherein: 1, a lifting lug A; 2, hanging a beam; 3, a lifting lug B; 4, rotating the ring; 5-position indicator connection part; 6-lead screw B; 7-a guide groove; 8, a support frame; 9-a screw rod A; 10-embracing claw, 11-suspender, 12-positioning ring and 13-connecting screw.
Detailed Description
A hoist for a position indicator according to the present invention will be described in detail with reference to the accompanying drawings and examples.
A hoist for a position indicator, comprising: a position indicator taking-out device (shown in fig. 2) that takes out the position indicator, and a position indicator hoisting device (shown in fig. 1) that hoists the position indicator taken out by the position indicator taking-out device.
The position indicator removing device comprises: the support frame 8, a lead screw A9 and a holding claw 10; the top central point department of support frame 8 has seted up the installation through-hole, the one end of lead screw A9 passes the installation through-hole, with the fixed top central point who sets up at support frame 8 of lead screw A9, the fixed claw 10 of embracing that is provided with in bottom of lead screw A9, the threaded portion on the lead screw A9 scribbles the molybdenum disulfide coating.
The hoisting device of the position indicator comprises: a plurality of lifting lugs A1, a hanging beam 2, a plurality of lifting lugs B3, a plurality of rotating rings 4, a plurality of position indicator connecting parts 5, a lead screw B6 and a guide groove 7; a plurality of lifting lugs A1 are welded at the top of the lifting beam 2 at equal intervals; the surface of the hanging beam 2 is provided with a guide groove 7; the lead screw B6 is fixedly arranged on the hanging beam 2.
The surface of the lead screw B6 includes: the screw B6 is provided with a plurality of screw nuts, and the middle parts of all lifting lugs B3 are sleeved on the screw B6.
The middle part of each lifting lug B3 is fixed on the lead screw B6 by lead screw nuts at equal intervals, and the positions of the three lifting lugs B3 can be adjusted back and forth on the lead screw B6 by lead screw nuts among the three lifting lugs B3.
The top of each lifting lug B3 is disposed in the guide groove 7, and the lower end of each lifting lug B3 is connected to a position indicator connecting part 5 through a rotating ring 4.
The thread part of the screw rod B6 is coated with a molybdenum disulfide coating.
The number of the lifting lugs A1, the lifting lugs B3, the rotating ring 4 and the indicator connecting part 5 is three, so that the requirement that the reactor can lift three position indicators at the same time can be met, and the position indicator connecting part 5 is of a T-shaped structure as a whole.
The rotating ring 4 comprises: the upper lifting ring is connected with the connecting lifting lug B3, the lower lifting ring is connected with the position indicator connecting part 5, and the upper lifting ring and the lower lifting ring are connected through the connecting bolt and can rotate freely for 360 degrees around the connecting bolt so as to realize the rotating direction in the lifting process of the position indicator.
The position indicator connecting part 5 includes: the device comprises a suspension rod 11, a positioning ring 12 and a plurality of connecting screws 13, wherein one end of the suspension rod 11 is connected with a lower suspension ring of the rotating ring 4, the other end of the suspension rod 11 is connected with the positioning ring 12, and the positioning ring 12 is used for being matched and positioned with the head of the position indicator; the connecting screws 13 are respectively arranged at two symmetrical sides of the positioning ring 12, and the connecting screws 13 are used for being connected with hanging holes at the head of the position indicator.
The number of the connecting screws 13 is two.
A hoisting method of the hoisting device for the position indicator as described above, comprising the steps of:
before hoisting, a ratchet wrench and a special wrench are used for unscrewing the bolts for 8-10 circles, sealing of the sleeve is removed, and the shroud ring, the sleeve, the moving assembly flange and the thrust ring are sequentially taken out;
the method comprises the following steps: checking the usability of the position indicator taking-out device, ensuring that a holding claw 10 and a lead screw A9 of the position indicator taking-out device are at working positions, connecting the holding claw 10 of the position indicator taking-out device with a head reducing part of a position indicator, rotating the lead screw A9 on the holding claw 10 by using a spanner, releasing the adhesion of the position indicator and a pressure-resistant shell, and taking out the position indicator;
step two: slightly placing the position indicator taken out by the position indicator taking-out device in the step one to the head of the moving assembly, rotating a lead screw A9 on the holding claw 10, and releasing the connection between the holding claw 10 and the position indicator on the position indicator taking-out device;
step three: inspection position indicator hoist device includes: checking the adjustability of a screw nut between lifting lugs B3 on the position indicator hoisting device, the integrity of the lifting lug B3 and no looseness of the rotating ring 4 and the position indicator connecting part 5;
the threaded part of the lead screw B6 is coated with a molybdenum disulfide coating, a lead screw nut on the lead screw B6 is adjusted, and the lifting lug B3 is moved in the guide groove 7, so that the distance between the three position indicator connecting parts 5 is equal to the distance between the three position indicators in the reactor core;
step four: connecting a crane hook with three lifting eyes A1 at the top of a position indicator hoisting device through hanging belts to ensure reliable connection, moving the crane above the position indicator, and after centering is completed, adjusting a rotating ring 4 to enable a hoisting point of a position indicator connecting part 5 to be connected with a hoisting point of the head of the position indicator;
step five: lifting the position indicator at a normal speed by using a crane until the bottom of the position indicator exceeds the height of the highest obstacle in the lifting process, rotating the crane, and conveying the position indicator to the position indicator storage partition; adjusting the screw nut on the position indicator hoisting device again to enable the distance between the three lifting lugs B3 to be equal to the distance of the storage positions on the position indicator storage partition;
when the screw nut on the screw rod B6 is adjusted, the lifting lugs B3 on the left side and the right side can be adjusted at the same distance, so that the position indicators on the left side and the right side are always kept balanced in the adjusting process; placing the position indicator on a storage shelf, recording the coordinate and the factory number of the position indicator by using a stainless steel adhesive tape, and then pasting the position indicator on the corresponding position indicator; the simultaneous position indicator hoist is disengaged.
The application of the hoisting method in actual work obtains good economic benefit and social benefit:
(1) the single major repair of a single unit can create about 800 ten thousand of income, and 4 units in the service life of the unit can create about 10 hundred million yuan;
(2) saving paper clothes by about 100 sets, reducing the generation of radioactive solid wastes and lightening the environmental pressure.
The device and the hoisting method can be popularized and applied in the related work of the same type of units; the device can also be popularized to other similar works of a power station; the method has good reference significance for other similar works in the same industry.
While the embodiments of the present invention have been described in detail, the present invention is not limited to the above-described examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. A lift device for a position indicator, comprising: the device comprises a position indicator taking-out device and a position indicator hoisting device, wherein the position indicator taking-out device takes out the position indicator, and the position indicator hoisting device hoists the position indicator taken out by the position indicator taking-out device.
2. A lifting device for a position indicator according to claim 1, wherein the position indicator extraction device comprises: the device comprises a support frame (8), a screw rod A (9) and a holding claw (10); the utility model discloses a lead screw, including support frame (8), lead screw A (9) and lead screw A, the top central point department of support frame (8) has seted up the installation through-hole, the one end of lead screw A (9) passes the installation through-hole, sets up lead screw A (9) fixed top central point in support frame (8) position, the fixed claw (10) of embracing that is provided with in bottom of lead screw A (9), the threaded portion on lead screw A (9) scribbles the molybdenum disulfide coating.
3. The apparatus as claimed in claim 1, wherein the apparatus comprises: the lifting device comprises a plurality of lifting lugs A (1), a lifting beam (2), a plurality of lifting lugs B (3), a plurality of rotating rings (4), a plurality of position indicator connecting parts (5), a screw rod B (6) and a guide groove (7); a plurality of lifting lugs A (1) are welded at the top of the lifting beam (2) at equal intervals; the surface of the hanging beam (2) is provided with a guide groove (7); the lead screw B (6) is fixedly arranged on the hanging beam (2).
The surface of the screw B (6) includes: the screw rod B (6) is provided with a plurality of screw rod nuts, and the middle parts of all lifting lugs B (3) are sleeved on the screw rod B (6) in a surrounding manner.
4. A hoist for a position indicator according to claim 3, characterized in that the middle of each lifting lug B (3) is screwed at equal intervals on the screw B (6) by a screw nut; the top of each lifting lug B (3) is arranged in a guide groove (7), and the lower end of each lifting lug B (3) is connected with a position indicator connecting part (5) through a rotating ring (4).
5. A hoist for a position indicator according to claim 3, wherein: and the thread part of the screw rod B (6) is coated with a molybdenum disulfide coating.
6. A hoist for a position indicator according to claim 3, wherein:
the number of the lifting lugs A (1), the number of the lifting lugs B (3), the number of the rotating rings (4) and the number of the indicator connecting parts (5) are three, and the position indicator connecting parts (5) are integrally of a T-shaped structure.
7. A hoist for a position indicator according to claim 6, characterized in that: the rotating ring (4) comprises: the upper lifting ring is connected with the connecting lifting lug B (3), the lower lifting ring is connected with the position indicator connecting part (5), and the upper lifting ring and the lower lifting ring are connected through the connecting bolt and can rotate freely for 360 degrees around the connecting bolt so as to realize the rotating direction in the hoisting process of the position indicator.
8. A hoist for a position indicator according to claim 7, wherein: the position indicator connecting part (5) comprises: the device comprises a suspender (11), a positioning ring (12) and a plurality of connecting screws (13), wherein one end of the suspender (11) is connected with a lower lifting ring of the rotating ring (4), the other end of the suspender (11) is connected with the positioning ring (12), and the positioning ring (12) is used for being matched and positioned with the head of the position indicator; the connecting screws (13) are respectively arranged on two symmetrical sides of the positioning ring (12), and the connecting screws (13) are used for being connected with lifting holes in the head of the position indicator.
9. A hoist for a position indicator according to claim 8, wherein: the number of the connecting screws (13) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121704112.7U CN215868660U (en) | 2021-07-26 | 2021-07-26 | Hoisting device for position indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121704112.7U CN215868660U (en) | 2021-07-26 | 2021-07-26 | Hoisting device for position indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215868660U true CN215868660U (en) | 2022-02-18 |
Family
ID=80331649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121704112.7U Active CN215868660U (en) | 2021-07-26 | 2021-07-26 | Hoisting device for position indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215868660U (en) |
-
2021
- 2021-07-26 CN CN202121704112.7U patent/CN215868660U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103939299B (en) | The split type mounting process of a kind of offshore wind turbine | |
| CN105110193A (en) | Precise positioning and automatic operating integrated system for electrolysis polar plate transport crown block | |
| CN215868660U (en) | Hoisting device for position indicator | |
| CN113555140A (en) | Hoisting device for position indicator and hoisting method thereof | |
| CN204917724U (en) | Electrolysis polar plate transport overhead traveling crane accurate positioning automatic operation integrated system | |
| CN212000942U (en) | Structure convenient for fixed winch maintenance | |
| CN104058333B (en) | A kind of underground nuclear power station reactor building circular crane crossbeam hanging method | |
| CN217061458U (en) | Centering guide system of nuclear power station reactor protection tube assembly transportation platform | |
| CN105405480B (en) | A kind of integrated dynamic testing equipment for nuclear fuel crane gear load test | |
| CN107134300B (en) | A kind of boom hoisting for Technologies of PWR Vessels cap assembly | |
| CN105225712A (en) | The switching device shifter under water of nuclear power station material-loading/unloading machine weight component load simulation integration | |
| CN205069137U (en) | Auto -change over device under water of nuclear power station loading and unloading machine weight subassembly load simulation integration | |
| CN107934744B (en) | Integral hoisting device for ring crane | |
| CN206066340U (en) | Nuclear power station valve valve cage attaching/detaching apparatus | |
| CN105405481A (en) | Apparatus for measuring braking length of nuclear fuel hoisting equipment with load protection | |
| CN215148618U (en) | Wind power generation yaw brake dismounting device | |
| CN201545652U (en) | Improved lower frame lifting device for semi-umbrella type water turbine generator sets | |
| CN206126729U (en) | Safety brake mechanism | |
| CN216518429U (en) | Wind generating set anemoscope support constriction device | |
| CN112783104A (en) | Intelligent monitoring system for factory | |
| CN202953722U (en) | Lifting device used for bridge crane | |
| CN209455937U (en) | A kind of taper lifting lug guiding column assembly | |
| CN219349806U (en) | Fixing device for nuclear power station integrated nuclear detection detector | |
| CN219854393U (en) | Accident distributing valve flip-chip tool | |
| CN218844391U (en) | Steam turbine atmosphere valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |