CN102758825B - Linking and locking device for pressurized-water type nuclear reactor internals and drilling tool - Google Patents
Linking and locking device for pressurized-water type nuclear reactor internals and drilling tool Download PDFInfo
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- CN102758825B CN102758825B CN201210259164.7A CN201210259164A CN102758825B CN 102758825 B CN102758825 B CN 102758825B CN 201210259164 A CN201210259164 A CN 201210259164A CN 102758825 B CN102758825 B CN 102758825B
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Abstract
The invention discloses a linking and locking device for pressurized-water type nuclear reactor internals. The linking and locking device mainly comprises a round-head hex socket head bolt (3) used for linking reactor internals (4), and a locking cap (2) sheathed on the circumferential surface at the head of the round-head hex socket head bolt (3), wherein the circumferential surface at the head of the round-head hex socket head bolt (3) is concave to form at least one locking groove, one end of the locking cap (2) is fixed on the reactor internals (4), and the other end of the locking cap (2) is higher than the end surface at one end of the round-head hex socket head bolt (3) away from the reactor internals (4). The invention also discloses a drilling tool used in the linking and locking device. The drilling tool comprises a cylindrical tool body (1), wherein the circumferential surface at one end of the tool body (1) is concave to form at least one drilling groove, and the opening size of the drilling groove is greater than that of the locking groove. The invention not only has good linking and locking effects, but also is convenient in underwater remote disassembling, and improves the maintenance efficiency.
Description
Technical field
The present invention relates to the connection between pressurized water nuclear reactor in-pile component, specifically refer to a kind of fourth contact instrument that connects locking device for pressurized water nuclear reactor in-pile component.
Background technique
In pressurized water nuclear reactor in-pile component, the normal Bolt Connection that adopts between structural member.For preventing that run duration from getting loose, must take anti-loosening locking measure to bolt; And have very strong radioactivity due to after in-pile component operation, maintenance is generally carried out remote-controlled operation under water darker, and therefore, this locking device demanding party is the remote disconnect under water of bolt just.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of connection locking device of pressurized water nuclear reactor in-pile component and special fourth contact instrument thereof are provided, it not only has good connection locking effect, and is convenient to remote disconnect under water, has improved the efficiency of maintenance.
Object of the present invention is achieved through the following technical solutions: a kind of connection locking device of pressurized water nuclear reactor in-pile component, mainly be made up of the round end hexagon socket head cap screw for connecting in-pile component and the locking cap that is sleeved on round end hexagon socket head cap screw head circumferential surface, the circumferential surface of described round end hexagon socket head cap screw head is indent and forms at least one locking groove; One end of described locking cap is fixed on in-pile component, and its other end exceeds one end end face of round end hexagon socket head cap screw away from in-pile component.
Connection locking principle of the present invention is: first by the screw portion of round end hexagon socket head cap screw, in-pile component is linked together; Then, locking cap is fixed on in-pile component, for the ease of operating and reducing costs, adopts the mode of welding to be fixed; Because the present invention is provided with locking groove on the circumferential surface of round end hexagon socket head cap screw head, after definite locking cap one end is fixed on in-pile component, by instrument, the sidewall of locking cap is bent and embedded in locking groove, thereby realized the connection locking of round end hexagon socket head cap screw.
For the ease of the dismounting of the round end hexagon socket head cap screw after locking, the present invention is designed to exceed one end end face of hex head bolt away from in-pile component by one end of locking cap, as exceed very little, be not easy to fourth contact instrument the flanging of locking cap is carried out to fourth contact, affect the fourth contact effect of locking cap, as exceed too much, increased manufacture cost, consider, the value range exceeding is got 2mm～3mm; In the time need to dismantling the round end hexagon socket head cap screw of locking, only fourth contact instrument need be put into locking cap and exceed the part of round end hexagon socket head cap screw, on circumferential surface due to fourth contact instrument, be provided with the fourth contact groove corresponding with locking groove quantity and position, by rotating fourth contact instrument, can complete the fourth contact to locking cap flanging, remove locking additional moment, and then by long handle inner hexagon spanner demounting bolt.
In the present invention, the internal diameter of described locking cap is greater than the external diameter 0.3mm～0.6mm of round end hexagon socket head cap screw head; The sidewall thickness of described locking cap is 0.6mm～0.8mm; The material of described locking cap is 304LN stainless steel.
As further optimization of the present invention, the number of described locking groove is 3, and is evenly distributed on round end hexagon socket head cap screw head circumferential surface, better connects locking effect thereby can realize.
For a fourth contact instrument for above-mentioned connection locking device, comprise and be cylindrical tool body, the circumferential surface of described tool body one end is indent and forms at least one fourth contact groove, and the opening size of this fourth contact groove is greater than the opening size of locking groove.The working principle of this fourth contact instrument is set forth in foregoing, does not repeat them here.
In order to match with the aforementioned optimized project that connects locking device, the number of the fourth contact groove of this fourth contact instrument is also designed to 3, and is evenly distributed on the circumferential surface of tool body.
In the present invention, only need above-mentioned tool body can realize the fourth contact of locking cap flanging, as long as the length long enough of tool body; But, for the ease of processing, as the further optimization of above-mentioned tool body, whole fourth contact instrument adopts two sections of formations, be also fixed with fourth contact bar in one end of tool body, adopt this kind of structure, the length that tool body only need meet fourth contact groove is greater than locking cap and exceeds the length of round end hexagon socket head cap screw, after tool body machines, then fourth contact bar is fixed on to one end of tool body; Carrying out in fourth contact process, by rotating fourth contact bar, can drive coupled tool body to rotate.
In sum, beneficial effect of the present invention is: not only have good connection locking effect, and be convenient to remote disconnect under water, improved the efficiency of maintenance.
Brief description of the drawings
Structural representation when Fig. 1 is in-pile component connection locking state;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is fourth contact operation chart of the present invention;
Fig. 4 is the plan view of Fig. 3;
Fig. 5 is view after fourth contact of the present invention;
Fig. 6 is the plan view of Fig. 5.
In accompanying drawing, the corresponding name of reference character is called: 1-tool body; 2-locking cap; 3-round end hexagon socket head cap screw; 4-in-pile component; 5-fourth contact bar.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
As illustrated in fig. 1 and 2, connection locking device of the present invention comprises round end hexagon socket head cap screw 3 and locking cap 2, round end hexagon socket head cap screw 3 is for connecting in-pile component 4, in real process, the screw portion of round end hexagon socket head cap screw 3 is coordinated with in-pile component 4 to be connected respectively, thereby realize the connection between in-pile component 4, for preventing that run duration from getting loose, round end hexagon socket head cap screw 3 must be taked anti-loosening locking measure, in the present invention, adopt locking cap 2 to realize the locking to round end hexagon socket head cap screw 3, this locking cap 2 is sleeved on the circumferential surface of round end hexagon socket head cap screw 3, and one end is welded on in-pile component 4, on the circumferential surface of round end hexagon socket head cap screw 3 heads, be provided with locking groove, this locking groove arranges along the medial axis direction of round end hexagon socket head cap screw 3, and run through two end faces up and down of round end hexagon socket head cap screw 3 heads, locking groove number in the present embodiment is 3, and be evenly distributed on the circumferential surface of round end hexagon socket head cap screw 3, after in-pile component 4 is connected and fixed by round end hexagon socket head cap screw 3, only the sidewall of locking cap 2 need be bent and embeds in locking groove, can prevent that round end hexagon socket head cap screw 3 is loosening in reactor operation process, avoid consequent serious accident.
In the time that needs are dismantled round end hexagon socket head cap screw 3, traditional mode is, by long handle inner hexagon spanner, it is carried out to brute force rotation, because the sidewall of locking cap 2 embeds in locking groove, in the process of rotation, the sidewall of locking cap 2 can be released to fourth contact from locking groove, continue rotation and just bolt can be unloaded; When operation, sometimes because moment of torsion is excessive, the hexagon socket head on long handle spanner is twisted into two parts, in this case, brought many troubles can to normal maintenance.
In order to solve the problems of the technologies described above, the present invention has carried out further optimization on the basis of above-mentioned connection locking device, locking cap 2 is designed to exceed one end end face of round end hexagon socket head cap screw 3 away from in-pile component away from one end of in-pile component 4, and after considering, the value range exceeding is got 2mm～3mm; And, also design a kind of supporting fourth contact instrument with it, this fourth contact instrument comprises and is cylindrical tool body 1, and the circumferential surface of described tool body 1 one end is indent and forms at least one fourth contact groove, and the opening size of this fourth contact groove is greater than the opening size of locking groove; For corresponding with the locking groove in the present embodiment, the number of the fourth contact groove in the present embodiment is also designed to 3, and is evenly distributed on the circumferential surface of tool body 1; In the time need to dismantling the round end hexagon socket head cap screw 3 of locking, as shown in Figures 3 and 4, only fourth contact instrument need be put into locking cap 2 and exceed the part of round end hexagon socket head cap screw 3, on circumferential surface due to fourth contact instrument, be provided with the fourth contact groove corresponding with locking groove quantity and position, by rotating fourth contact instrument, can complete the fourth contact to locking cap flanging, remove locking additional moment, view after completing as illustrated in Figures 5 and 6, and then by long handle inner hexagon spanner demounting bolt; For the ease of the processing of fourth contact instrument, whole fourth contact instrument can adopt two sections of formations, and interconnective tool body 1 and fourth contact bar 5, first process tool body 1, then sufficiently long fourth contact bar 5 is fixed on tool body 1; Carrying out in fourth contact process, by rotating fourth contact bar 5, can drive coupled tool body 1 to rotate.
As mentioned above, just can realize preferably the present invention.
Claims (3)
1. one kind connects the fourth contact instrument of locking device for pressurized water nuclear reactor in-pile component, described pressurized water nuclear reactor in-pile component connects locking device and is mainly made up of the round end hexagon socket head cap screw (3) for connecting in-pile component (4) and the locking cap (2) that is sleeved on round end hexagon socket head cap screw (3) head circumferential surface, and the circumferential surface of described round end hexagon socket head cap screw (3) head is indent and forms at least one locking groove; It is upper that one end of described locking cap (2) is fixed on in-pile component (4), and its other end exceeds one end end face of round end hexagon socket head cap screw (3) away from in-pile component (4), it is characterized in that:
Described fourth contact instrument comprises and is cylindrical tool body (1), and the circumferential surface of described tool body (1) one end is indent and forms at least one fourth contact groove, and the opening size of this fourth contact groove is greater than the opening size of locking groove.
2. a kind of fourth contact instrument that connects locking device for pressurized water nuclear reactor in-pile component according to claim 1, is characterized in that:
The number of described fourth contact groove is 3, and is evenly distributed on the circumferential surface of tool body (1).
3. a kind of fourth contact instrument that connects locking device for pressurized water nuclear reactor in-pile component according to claim 1 and 2, is characterized in that:
The other end of described tool body (1) is also fixed with fourth contact bar (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259164.7A CN102758825B (en) | 2012-07-25 | 2012-07-25 | Linking and locking device for pressurized-water type nuclear reactor internals and drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210259164.7A CN102758825B (en) | 2012-07-25 | 2012-07-25 | Linking and locking device for pressurized-water type nuclear reactor internals and drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102758825A CN102758825A (en) | 2012-10-31 |
| CN102758825B true CN102758825B (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210259164.7A Active CN102758825B (en) | 2012-07-25 | 2012-07-25 | Linking and locking device for pressurized-water type nuclear reactor internals and drilling tool |
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| CN (1) | CN102758825B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139668A (en) * | 2017-06-28 | 2019-01-04 | 中国航发贵阳发动机设计研究所 | It is a kind of to generate self-locking connection structure using retainer bias |
| CN109538593A (en) * | 2019-01-10 | 2019-03-29 | 廖从平 | A kind of furniture connection lock fastener |
| CN110539278A (en) * | 2019-09-25 | 2019-12-06 | 华域视觉科技(上海)有限公司 | nut mounting tool for lamp body |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0194330A1 (en) * | 1985-03-13 | 1986-09-17 | ACEC, Société Anonyme | Irradiated fuel assembly screw replacement method and device using this method |
| US4982763A (en) * | 1989-04-13 | 1991-01-08 | The Babcock & Wilcox Company | Plug retainer |
| CN1151490A (en) * | 1995-11-02 | 1997-06-11 | 亚瑞亚·勃朗勃威力有限公司 | Screw retention device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4718726B2 (en) * | 2001-07-04 | 2011-07-06 | 三菱重工業株式会社 | Connecting bolt and rotating shaft connected by the connecting bolt |
-
2012
- 2012-07-25 CN CN201210259164.7A patent/CN102758825B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0194330A1 (en) * | 1985-03-13 | 1986-09-17 | ACEC, Société Anonyme | Irradiated fuel assembly screw replacement method and device using this method |
| US4982763A (en) * | 1989-04-13 | 1991-01-08 | The Babcock & Wilcox Company | Plug retainer |
| CN1151490A (en) * | 1995-11-02 | 1997-06-11 | 亚瑞亚·勃朗勃威力有限公司 | Screw retention device |
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| CN102758825A (en) | 2012-10-31 |
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