CN203130744U - Loosening prevention fastening piece for nuclear power equipment connection - Google Patents
Loosening prevention fastening piece for nuclear power equipment connection Download PDFInfo
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- CN203130744U CN203130744U CN 201320007523 CN201320007523U CN203130744U CN 203130744 U CN203130744 U CN 203130744U CN 201320007523 CN201320007523 CN 201320007523 CN 201320007523 U CN201320007523 U CN 201320007523U CN 203130744 U CN203130744 U CN 203130744U
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- nut
- stud
- locking
- cup
- nuclear power
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Abstract
The utility model provides a loosening prevention fastening piece for nuclear power equipment connection. The loosening prevention fastening piece comprises a double end stud and a nut for being connected with the end portion of the double end stud. One end of the double end stud is screwed in a threaded hole in the bottom of a first part to be connected in a threaded mode, a protruding part is arranged at the other end of the double end stud, and the double end stud penetrates through a through hole in one part to be connected or through holes in more parts to be connected and then is screwed up through the nut. The protruding part is arranged outside the nut and provided with a plurality of semicircular grooves. The other end of the double end stud and the whole nut are coated by an anti-loosening cup, a coating ring is arranged on a contact position of the anti-loosening cup and the protruding part of the double end stud, the coating ring and the semicircular grooves of the protruding part are clamped through clamping tools, and the anti-loosening cup is fixedly connected with the nut through a plurality of pin bolts. At the moment, the nut, the double end stud and the anti-loosening cup are integrally connected and cannot rotate relatively. The loosening prevention fastening piece is simple in structure and reliable, can solve an anti-loosening problem of nuclear power project fastening studs, and can ensure that the nuclear power project fastening studs do not loosen for a long time.
Description
Technical field
The utility model relates to the nuclear power generating equipment connection set, is specifically related to the anti-loose fastening piece of a kind of nuclear power generating equipment connection.
Background technique
In nuclear reactor, for the location of realizing equipment and fixing, need a large amount of fastening pieces that use.The stream of nuclear reactor causes vibration and causes getting loose of fastening piece easily, brought accident risk in order to reduce because fastening piece loses efficacy, at novel nuclear reactor, considered to reduce the use of fastening piece during design as far as possible, but necessary fastening piece still can't be cancelled, and this need improve the anti-loosening property of fastening piece as the assurance of safety.
Fastening stud is reactor fastening piece commonly used, and it generally is made up of stud and nut.As shown in Figure 1, in long-term vibration working environment, stud and nut simply tighten the fastening inefficacy of easy generation.The inefficacy of general fastening stud has two kinds of forms, and a kind of is that vibration causes that nut gets loose with relatively rotating of double-screw bolt, and another kind then is to vibrate to cause nut and double-screw bolt unitary rotation and get loose.
In reactor, for preventing fastening inefficacy, general anti-loose structure (as shown in Figure 1) is at nut and is connected the enterprising spot welding of part, but the vibration of equipment can cause double-screw bolt and the slippage of nut integral level, locking solder joint on the nut might be because being subjected to big shearing load or losing efficacy because of tired, after the locking solder joint failure, will cause that the integral body of nut or nut and double-screw bolt comes off.
Summary of the invention
The purpose of this utility model is to provide a kind of simple, reliable anti-loose fastening piece, with the locking problem that solves the nuclear power engineering fastening stud.
Realize the technological scheme of the utility model purpose: a kind of nuclear power generating equipment connects uses anti-loose fastening piece, and it comprises that a stud uses nut with being connected with stud end portions; The threaded one end of described stud screws in the tapped hole of part to be connected one bottom, and the other end of stud has protuberance, and it uses nut screwing clamping after passing the through hole that has on one or several part to be connected; Described protuberance is as for outside the nut, and protuberance is provided with several semicircle grooves; Locking cup coats the other end and the whole nut of this stud, and locking cup is to coat ring with the protuberance contacting point of stud, and the semicircle groove that coats ring and protuberance uses clamping tool to clamp; Locking cup is fixedlyed connected by several pins with nut; Nut, stud and locking cup three are connected as a single entity at this moment, can not relatively rotate.
Aforesaid a kind of nuclear power generating equipment connects uses anti-loose fastening piece, its described nut bottom symmetry has two locking pin-and-holes, locking cup corresponding position also is provided with two locking pin-and-holes, two pins pass respectively in the locking pin-and-hole of the nut that the locking pin-and-hole of locking cup is fixed on, and two pins circumferentially are connected as a single entity with locking glass by welding manner.
Aforesaid a kind of nuclear power generating equipment connects uses anti-loose fastening piece, its described locking cup is provided with at the end near nut curls flange, the external diameter of curling flange is more smaller than the counterbore of part to be connected, locking cup is behind the counterbore of packing into, curl that welding manner links to each other between flange and the counterbore, this welding makes that nut, stud and locking cup can not unitary rotation.
Aforesaid a kind of nuclear power generating equipment connects uses anti-loose fastening piece, and its described locking cup is provided with some discharge orifices, to be used for the cooling of nut, stud.
Effect of the present utility model is: a kind of nuclear power generating equipment described in the utility model connects uses anti-loose fastening piece, its by check pin and nut fix, the protuberance of stud clamps with coating ring, can prevent from vibrating causing nut and relatively rotating of stud and getting loose; The design of curling flange makes locking cup be welded on the hole wall with the locking of counterbore, when stud and the slippage of nut integral level, the weld seam of flange end is avoided the effect of direct tangential force and is made welding seam failure, causes double end nut and double-screw bolt unitary rotation and gets loose.Fastener constructions of the present utility model has certain flexibility in the horizontal direction, can allow stud and nut to have certain horizontal sliding, and can guarantee not get loose for a long time.
Description of drawings
Fig. 1 is existing fastener constructions schematic representation;
Fig. 2 is that a kind of nuclear power generating equipment described in the utility model connects with anti-loose fastener constructions schematic representation;
Fig. 3 is the I part partial enlarged drawing of Fig. 2;
Fig. 4 is locking cup structure schematic representation;
Among the figure: 1. stud; 2. nut; 3. locking pin-and-hole; 4. protuberance; 5. part one to be connected; 6. locking glass; 7. part two to be connected; 8. pin; 9. coat ring; 10. curl flange; 11. part three to be connected; 12. counterbore; 13. discharge orifice.
Embodiment
Below in conjunction with the drawings and specific embodiments a kind of nuclear power generating equipment connection described in the utility model is further described with anti-loose fastening piece.
As shown in Figure 2, a kind of nuclear power generating equipment described in the utility model connects uses anti-loose fastening piece, and it mainly comprises a stud 1, nut 2, pin 8 and locking cup 6.
The threaded one end of described stud 1 screws in the tapped hole of part to be connected one 5 bottoms, and the other end of stud 1 has protuberance 4, and it is tightened with nut 2 after passing the through hole that has on two parts 7 to be connected, 11.The protuberance 4 of stud 1 is as for outside the nut 2, and protuberance 4 is provided with several semicircle grooves.
Extremely shown in Figure 4 as Fig. 2, locking cup 6 coats the other end and the whole nut 2 of these stud 1, and locking cup 6 is to coat ring 9 with protuberance 4 contacting points of stud 1, and the semicircle groove that coats ring 9 and protuberance 4 uses clamping tool to clamp.Nut 2 bottom symmetries have two locking pin-and-holes 3, locking cup 6 corresponding positions also are provided with two locking pin-and-holes, two pins 8 pass respectively in the locking pin-and-hole 3 of the nut 2 that the locking pin-and-hole of locking cup 6 is fixed on, and two pins 8 circumferentially are connected as a single entity with locking glass 6 by welding manner.Nut 2, stud 1 and locking cup 6 threes are connected as a single entity at this moment, can not relatively rotate.
A kind of nuclear power generating equipment connection described in the utility model has certain flexibility with anti-loose fastening piece, when stud and the slippage of nut integral level, the flange design of locking cup allows locking cup to curl the place at flange local distortion, makes the weld seam of flange end avoid the effect of direct tangential force and lost efficacy.
Claims (4)
1. a nuclear power generating equipment connects and use anti-loose fastening piece, and it comprises a stud (1) and be connected usefulness nut (2) with stud (1) end, it is characterized in that:
The threaded one end of described stud (1) screws in the tapped hole of part to be connected one (5) bottom, the other end of stud (1) has protuberance (4), and it is tightened with nut (2) after passing the through hole that has on one or several part to be connected (7,11); Described protuberance (4) is as for outside the nut (2), and protuberance (4) is provided with several semicircle grooves;
Locking cup (6) coats the other end and the whole nut (2) of this stud (1), locking cup (6) is to coat ring (9) with protuberance (4) contacting point of stud (1), and the semicircle groove that coats ring (9) and protuberance (4) uses clamping tool to clamp; Locking cup (6) is fixedlyed connected by several pins (8) with nut (3); Nut (2), stud (1) and locking cup (6) three are connected as a single entity at this moment, can not relatively rotate.
2. a kind of nuclear power generating equipment according to claim 1 connects and uses anti-loose fastening piece, it is characterized in that: described nut (2) bottom symmetry has two locking pin-and-holes (3), locking cup (6) corresponding position also is provided with two locking pin-and-holes, two pins (8) pass respectively in the locking pin-and-hole (3) of the nut (2) that the locking pin-and-hole of locking cup (6) is fixed on, and two pins (8) circumferentially are connected as a single entity by welding manner and locking glass (6).
3. a kind of nuclear power generating equipment according to claim 1 and 2 connects and uses anti-loose fastening piece, it is characterized in that: described locking cup (6) is provided with at the end near nut curls flange (10), the external diameter of curling flange (10) is more smaller than the counterbore (12) of part to be connected, locking cup (6) is behind the counterbore of packing into (12), curl that welding manner links to each other between flange (10) and the counterbore (14), this welding makes that nut (2), stud (1) and locking cup (6) can not unitary rotation.
4. anti-loose fastening piece is used in a kind of nuclear power generating equipment connection according to claim 1 and 2, and it is characterized in that: described locking cup (6) is provided with some discharge orifices (13), to be used for the cooling of nut (2), stud (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320007523 CN203130744U (en) | 2013-01-08 | 2013-01-08 | Loosening prevention fastening piece for nuclear power equipment connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320007523 CN203130744U (en) | 2013-01-08 | 2013-01-08 | Loosening prevention fastening piece for nuclear power equipment connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203130744U true CN203130744U (en) | 2013-08-14 |
Family
ID=48938724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320007523 Withdrawn - After Issue CN203130744U (en) | 2013-01-08 | 2013-01-08 | Loosening prevention fastening piece for nuclear power equipment connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203130744U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161813A (en) * | 2013-01-08 | 2013-06-19 | 上海核工程研究设计院 | Anti-loose fastener for connection of nuclear power equipment |
| CN106402132A (en) * | 2016-06-02 | 2017-02-15 | 华能山东石岛湾核电有限公司 | Special-shaped locking gasket for reactor core shell bearing ball cover plate of high temperature gas cooled reactor |
| CN116428260A (en) * | 2023-04-12 | 2023-07-14 | 绍兴山耐高压紧固件有限公司 | Fastener for nuclear power engineering and manufacturing method thereof |
-
2013
- 2013-01-08 CN CN 201320007523 patent/CN203130744U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161813A (en) * | 2013-01-08 | 2013-06-19 | 上海核工程研究设计院 | Anti-loose fastener for connection of nuclear power equipment |
| CN103161813B (en) * | 2013-01-08 | 2015-03-25 | 上海核工程研究设计院 | Anti-loose fastener for connection of nuclear power equipment |
| CN106402132A (en) * | 2016-06-02 | 2017-02-15 | 华能山东石岛湾核电有限公司 | Special-shaped locking gasket for reactor core shell bearing ball cover plate of high temperature gas cooled reactor |
| CN116428260A (en) * | 2023-04-12 | 2023-07-14 | 绍兴山耐高压紧固件有限公司 | Fastener for nuclear power engineering and manufacturing method thereof |
| CN116428260B (en) * | 2023-04-12 | 2023-10-31 | 绍兴山耐高压紧固件有限公司 | Fastener for nuclear power engineering and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130814 Effective date of abandoning: 20150325 |
|
| RGAV | Abandon patent right to avoid regrant |