CN108658021B - Nuclear power station manhole cover plate dismounting tool - Google Patents
Nuclear power station manhole cover plate dismounting tool Download PDFInfo
- Publication number
- CN108658021B CN108658021B CN201710201715.7A CN201710201715A CN108658021B CN 108658021 B CN108658021 B CN 108658021B CN 201710201715 A CN201710201715 A CN 201710201715A CN 108658021 B CN108658021 B CN 108658021B
- Authority
- CN
- China
- Prior art keywords
- manhole cover
- nuclear power
- power station
- cover plate
- pry bar
- 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
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 5
- 238000000034 method Methods 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F15/00—Crowbars or levers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention relates to a disassembly and assembly tool of a manhole cover plate of a nuclear power station, which is used for opening the manhole cover plate of container equipment of the nuclear power station, and comprises a pair of disassembly and assembly rods in complete set configuration, wherein each disassembly and assembly rod comprises a pry bar, a movable supporting ring and a movable head, the movable head is arranged at the top end of the pry bar and is hinged with the pry bar, a limiting hole is further formed in the middle of the pry bar, a limiting pin is inserted in the limiting hole, and the movable supporting ring is sleeved on the pry bar and slides between the movable head and the limiting pin. Compared with the prior art, the invention has the advantages of labor saving, safety, flange surface protection, wide application range and the like.
Description
Technical Field
The invention relates to a disassembly and assembly tool, in particular to a disassembly and assembly tool for a manhole cover plate of a nuclear power station.
Background
Currently, in a nuclear power plant, a manhole cover plate needs to be opened when container equipment is internally inspected, and most manholes are connected through flanges. For high pressure-class container equipment (such as steam generators, passive waste heat removal heat exchangers and the like), the manhole cover plate is thicker and heavier, and some are even hundreds of kilograms, and the equipment runs for a long time under the condition that the manhole cover plate and the tank body are adhered together. The method adopted by the maintenance personnel for dismounting the manhole door of the container at present is as follows: the method of matching crow bars, jackscrews and locating pins is adopted for completion, and the following problems exist:
(1) The use of crowbars to forcibly open manhole cover plates, particularly lined or impregnated manhole flange sealing surfaces, which are adhered together, presents the risk of damaging the lining or impregnated layers of the flange sealing surfaces.
(2) When the heavy cover plate is dismounted by using the crowbar, mechanical damage is easy to occur due to the restriction of human factors and the limitation of using a power arm of the crowbar.
(3) When manhole apron is reinstalled, in order to guarantee that concentricity and parallelism of flange satisfy the requirement, need use the crowbar to adjust, there is the risk that the crowbar damaged bolt hole screw thread, and the adjustment is inconvenient.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a labor-saving, safe and wide-application-range tool for dismounting and mounting a manhole cover plate of a nuclear power station, wherein the flange surface is protected.
The aim of the invention can be achieved by the following technical scheme:
The utility model provides a nuclear power station manhole apron assembly and disassembly tools for open the manhole apron of nuclear power station container class equipment, this assembly and disassembly tools includes the dismouting pole of a pair of complete set configuration, and every dismouting pole includes pinch bar, movable support ring and movable head, the movable head set up on the pinch bar top and articulated with the pinch bar, the pinch bar middle part still seted up the spacing hole, wherein inserted the spacer pin, movable support ring cover establish on the pinch bar to slide between movable head and spacer pin.
The top end of the pry bar is provided with a bolt hole and is hinged with the movable head through a bolt, and the movable head rotates by taking the bolt as a rotating shaft.
The rotation range of the movable head is 0-180 degrees.
The movable supporting ring is in clearance fit with the pry bar.
The limiting pin is in interference fit with the limiting hole, and the bolt is in interference fit with the bolt hole.
And at least one limiting hole is formed, and when the number of the limiting holes is 3 or more, the limiting holes are distributed on the pry bar at equal intervals.
The movable head and the movable supporting ring are made of aluminum alloy.
The bolt, the limiting pin and the pry bar are all made of stainless steel.
Compared with the prior art, the invention has the following advantages:
1. The manhole cover plate is convenient to center and adjust, and saves more labor:
The size of the movable supporting ring and the size of the movable head are matched with the size of the bolt hole, so that the manhole cover plate is more convenient to center, and the length of the power arm is better than that of the crowbar by utilizing the lever principle, so that the movable supporting ring and the movable head are more labor-saving to use.
2. The risk of equipment damage and personal injury is lower, and factor of safety is high:
Compared with the use of a crowbar, the tool is safer, and because the movable head and the supporting ring are made of softer materials, all parts which are in contact with equipment to be stressed are made of aluminum alloy materials in the use process, the hardness of the parts is far lower than that of the equipment, and the parts cannot damage threaded holes and the equipment. Simultaneously, each part of the tool is smooth to process, no sharp part exists, and the risk of personal injury is lower.
3. The manhole flange sealing surface can be effectively protected:
For the manhole cover plate adhered together, the characteristic that the pry bar can swing 180 degrees around the movable head at the matching position of the groove shaft of the movable head is utilized, the upward acting force is applied to the pry bar to overcome the adhesive force of the manhole cover plate, the manhole cover plate is opened, and the sealing surface of the manhole flange can be effectively protected.
4. The application range is wider:
The tool can be manufactured according to the size requirements of the on-site manhole cover plate and the bolt hole, has wider applicability, not only can be used for disassembling and assembling the manhole cover, but also can be used for adjusting the parallelism and concentricity of the large-caliber valve and the pipeline flange.
Drawings
Fig. 1 is an exploded view of an assembly of a removable rod.
Fig. 2 is a schematic diagram of a movable head.
Fig. 3 is a schematic view of a latch.
FIG. 4 is a schematic view of a movable support ring.
Fig. 5 is a schematic view of a stop pin.
Fig. 6 is a schematic view of a pry bar.
Fig. 7 is a schematic view of the structure of the dismounting rod.
Wherein, 1, movable head, 2, movable support ring, 3, bolt, 4, spacer pin, 5, crow bar.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Examples
Aiming at the practical problems encountered in the process of disassembling and assembling the manhole cover plate, the invention provides a tool for disassembling and assembling the manhole cover plate of a nuclear power station.
As shown in fig. 1-7, the tool structure mainly comprises a movable head 1, a movable supporting ring 2, a bolt 3, a limiting pin 4 and a pry bar 5.
The pry bar 5 is connected with the movable head 1 through the bolt 3, and the pry bar 5 can swing around the movable head by 180 degrees at the matching position of the groove shaft of the movable head 1. The limiting hole on the pry bar 5 is used for inserting the limiting pin 4 and preventing the movable supporting ring 2 from falling out of the manhole cover plate screw hole, the movable supporting ring 2 is sleeved on the pry bar and can axially and freely move, and the supporting point is determined according to the position of the supporting ring on the pry bar 5, wherein the thickness of the cover plate is adjusted.
The movable head 1 and the movable supporting ring 2 are made of aluminum alloy materials, the sizes of the movable head and the movable supporting ring are manufactured according to the sizes of bolt holes, and the surfaces of the movable head and the movable supporting ring are smooth and have no burrs and the like. The bolt, the limiting pin and the pry bar are made of stainless steel. The movable head and the movable supporting ring can be replaced according to the size of the field bolt hole.
The limiting pin 4 and the bolt are taper pins, the bolt 3 and the pry bar, and the limiting pin 4 and the pry bar 5 are fixed in an interference fit mode, and enough tightening force is provided after installation so as to ensure that falling does not occur in the using process.
The length of the pry bar 5 can be freely selected according to the needs, the inner diameter of the movable supporting ring 2 is in clearance fit with the pry bar 5, the turning quantity at the root of the pry bar 5 is in clearance fit with a movable head groove, the sizes of the movable head 1 and the movable supporting ring 2 are processed according to the sizes of bolt holes, and the two tools are matched with one another.
When the tool is used, the direction of the manhole cover plate is adjusted as the direction of force according to the requirement, the movable head 1 is correctly installed into the manhole seat bolt hole, and the direction of the pry bar 5 swinging along the axial direction of the groove of the movable head 1 is ensured to be consistent with the direction of the force. The center point of the thickness of the manhole cover plate is selected at the position of the movable supporting ring 2, and the manhole cover plate is dismounted by applying force to the pry bar.
Claims (4)
1. The utility model provides a nuclear power station manhole cover board assembly and disassembly tools for open the manhole cover board of nuclear power station container class equipment, its characterized in that, this assembly and disassembly tools includes a pair of dismouting pole of complete set configuration, and every dismouting pole includes crow bar (5), activity support ring (2) and activity head (1), activity head (1) set up on crow bar (5) top and articulated with crow bar (5), crow bar (5) middle part still seted up spacing hole, wherein inserted locating pin (4), activity support ring (2) cover establish on crow bar (5) to slide between activity head (1) and locating pin (4);
The top end of the pry bar (5) is provided with a bolt hole and is hinged with the movable head (1) through a bolt (3), and the movable head (1) rotates by taking the bolt (3) as a rotating shaft;
the rotation range of the movable head (1) is 0-180 degrees;
the movable supporting ring (2) is in clearance fit with the pry bar (5);
The limiting pin (4) is in interference fit with the limiting hole, and the bolt (3) is in interference fit with the bolt hole.
2. The tool for assembling and disassembling the manhole cover plate of the nuclear power station according to claim 1, wherein at least one limiting hole is arranged, and when the number of the limiting holes is 3 or more, the limiting holes are distributed on the pry bar (5) at equal intervals.
3. The tool for disassembling and assembling the manhole cover plate of the nuclear power station according to claim 1, wherein the movable head (1) and the movable supporting ring (2) are made of aluminum alloy.
4. The tool for disassembling and assembling the manhole cover plate of the nuclear power station according to claim 1, wherein the bolt (3), the limiting pin (4) and the pry bar (5) are all made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201715.7A CN108658021B (en) | 2017-03-30 | 2017-03-30 | Nuclear power station manhole cover plate dismounting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201715.7A CN108658021B (en) | 2017-03-30 | 2017-03-30 | Nuclear power station manhole cover plate dismounting tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108658021A CN108658021A (en) | 2018-10-16 |
| CN108658021B true CN108658021B (en) | 2024-10-01 |
Family
ID=63786567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710201715.7A Active CN108658021B (en) | 2017-03-30 | 2017-03-30 | Nuclear power station manhole cover plate dismounting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108658021B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111267043B (en) * | 2020-03-13 | 2024-08-09 | 江苏核电有限公司 | Nuclear power station deflection type manhole cover plate center position adjusting tool and adjusting method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964352A (en) * | 2014-05-07 | 2014-08-06 | 国家电网公司 | Novel well cover opening tool |
| CN206843003U (en) * | 2017-03-30 | 2018-01-05 | 中电华元核电工程技术有限公司 | A kind of nuclear power station cover plate for manhole dismantling device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202577358U (en) * | 2012-05-10 | 2012-12-05 | 浙江图维电力科技有限公司 | Tool for manually opening well lid |
| CN202848993U (en) * | 2012-09-28 | 2013-04-03 | 常州信息职业技术学院 | Valve well lid opener |
| CN203905058U (en) * | 2014-04-26 | 2014-10-29 | 昆明豫云通信技术有限公司 | Anti-theft well lid and opener thereof |
-
2017
- 2017-03-30 CN CN201710201715.7A patent/CN108658021B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964352A (en) * | 2014-05-07 | 2014-08-06 | 国家电网公司 | Novel well cover opening tool |
| CN206843003U (en) * | 2017-03-30 | 2018-01-05 | 中电华元核电工程技术有限公司 | A kind of nuclear power station cover plate for manhole dismantling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108658021A (en) | 2018-10-16 |
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