CN203045287U - Stretching nut guiding mechanism - Google Patents
Stretching nut guiding mechanism Download PDFInfo
- Publication number
- CN203045287U CN203045287U CN 201220656738 CN201220656738U CN203045287U CN 203045287 U CN203045287 U CN 203045287U CN 201220656738 CN201220656738 CN 201220656738 CN 201220656738 U CN201220656738 U CN 201220656738U CN 203045287 U CN203045287 U CN 203045287U
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- China
- Prior art keywords
- wear
- stretching nut
- stretching
- kingbolt
- nut
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- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a guiding mechanism for threaded fastening, especially relates to a stretching nut guiding mechanism which is suitable for the centering guide of inner and outer threaded center lines before a pressure container kingbolt tensioner stretching nut is screwed in a kingbolt. The guiding mechanism comprises a stretching nut and a wear-resisting guide sleeve. The stretching nut guiding mechanism is characterized in that a center line of the wear-resisting guide sleeve is consistent to that of the stretching nut; a guiding hole accommodating the wear-resisting guide sleeve is disposed in a bottom face of the stretching nut; the wear-resisting guide sleeve can be arranged in the guiding hole; the wear-resisting guide sleeve is fastened in the guiding hole of the stretching nut through a plurality of fastening bolts at the bottom; with the inner hole guiding of the wear-resisting guide sleeve, the connection between an internal thread of the stretching nut and an external thread of the kingbolt can be easier and faster. The stretching nut guiding mechanism is unique in design and concept; simple in structure; easy and practical to use; light in weight; convenient for maintenance; wide in application range; convenient for operation and use.
Description
Technical field
The utility model belongs to the guiding mechanism that screw threads for fastening is used, and is applicable to that particularly pressure vessel kingbolt stretching-machine stretching nut screws in a kind of stretching nut guiding mechanism of the preceding internal and external threads center line centering guiding of kingbolt.Simultaneously, but also be applicable to other bolt tension machine and stretcher.
Background technology
Current, along with the development of nuclear power industry, the kind of reactor pressure vessel product and quantity are more and more, and effect and the importance thereof of whole bolt tension machine that is used for the pressure vessel of kingbolt stretching pretension, dismounting highlights day by day.Use at present the kingbolt stretching-machine that the reactor pressure vessel kingbolt is stretched in the operation of pretension, dismounting; Its structure is included in the stretching-machine assembly the stretching nut by being threaded on the kingbolt; when regular meeting appears at the stretching nut screw-in kingbolt of kingbolt stretching-machine; can't normally screw in or screw out midway; the nut that causes stretching is in a dilemma; screw thread with stretching nut and kingbolt grinds wound at last, causes economic loss and bad social influence.It is a lot of that it causes screw thread to grind the factor of wound, except accuracy of screw machining, surface roughness, imperfect thread is not repaired or it is bad to repair, internal and external threads screws in factors such as initial position is incorrect.Accuracy of screw machining, surface roughness, imperfect thread finishing etc. can solve by the method that improves machining accuracy.This screws into the guiding deficiency when initial, make internal and external threads screw in incorrect this factor of initial position, then be to belong to the device structure defective, because no matter be internal thread or external screw thread, it all is spiral, has certain lift angle, when external screw thread just contact with internal thread-when namely not screwing in, two screw threads play the effect of support, because it is gapped between stretching nut and the peripheral part, the stretching nut all has displacement space 360 ° of scopes, makes the center line of externally threaded center line and internal thread not on same straight line, but forms certain included angle α, cause screw thread normally not screw in, must be through certain distance-be the phase mutual friction of the internal and external threads of the number of turns, mutual restriction just can make and be threaded between the inner external screw thread tooth, so, in being threaded into process, being easy to cause internal and external threads to grind and hindering defective.
Summary of the invention
The utility model is intended to the shortcoming and defect that exists in above-mentioned technology, produce to grind from the internal and external threads of stopping pressure vessel kingbolt stretching-machine and hinder defective, and a kind of stretching nut guiding mechanism is provided.Not only design concept uniqueness of this stretching nut guiding mechanism, simple in structure, not only simple and practical, but also weight of equipment light, and have and be convenient to maintenance, characteristics such as very convenient are used in applied widely and operation.
The purpose of this utility model is to adopt following technical scheme to realize: described stretching nut guiding mechanism, comprise the stretching nut, the wear-resistant guiding cover, it is characterized in that: its wear-resistant guiding cover center line is consistent with the center line of stretching nut, the pilot hole of wear-resistant guiding cover is held in processing one in this stretching nut bottom surface, the wear-resistant guiding cover of packing in its pilot hole, described wear-resistant guiding cover is fastened in the stretching nut pilot hole by a plurality of fastening bolts of bottom surface, endoporus guiding by its wear-resistant guiding cover makes the stretching nut inner thread be connected with the kingbolt external screw thread.
The function of each parts in the utility model is:
Described stretching nut is mainly used in the bolt pretension, dismounting stretches.
Described wear-resistant guiding cover is mainly used in stretching and plays cushioning effect when nut has just contacted with kingbolt, and the stretching nut screws in the kingbolt process and plays guide effect, and the nut that is conducive to stretch screws in the matching thread place of kingbolt smoothly.
Described a plurality of fastening bolt is mainly used in the wear-resistant guiding cover is fastened on the stretching nut.
Characteristics of the present utility model are described below:
Key point of the present utility model is that stretching nut in the prior art is increased certain-length, at wear-resisting, the difficult nonmetal wear-resistant guiding cover of cutting the end that produces of nylon of growth position installation and so on, this wear-resistant guiding cover mainly plays when the stretching nut has just contacted with kingbolt in cushioning effect and the stretching nut screw-in kingbolt process and plays guide effect.The utility model is fastened on the stretching nut with a plurality of fastening bolts with the wear-resistant guiding cover and forms stretching nut guiding mechanism.
The comprehensive above technical scheme of taking realizes the purpose of this utility model.
Therefore, not only design concept uniqueness of the utility model, simple in structure, not only simple and practical, but also weight of equipment light, and have and be convenient to maintenance, characteristics such as very convenient are used in applied widely and operation.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model has two width of cloth accompanying drawings.Wherein:
Accompanying drawing 1 is that the stretching nut screws in the preceding view of kingbolt;
Accompanying drawing 2 is view behind the stretching nut screw-in kingbolt.
Among the figure: 1, stretching nut, 2, the wear-resistant guiding cover, 3, fastening bolt, 4, kingbolt.
The specific embodiment
Be specific embodiment of the utility model shown in Fig. 1,2, it is pressure vessel kingbolt stretching-machine stretching nut guiding mechanism; Its structure comprises stretching nut 1, wear-resistant guiding cover 2, it is characterized in that: it is consistent with the center line of stretching nut 1 that its wear-resistant guiding overlaps 2 center lines, the pilot hole of wear-resistant guiding cover 2 is held in processing one in this stretching nut 1 bottom surface, the wear-resistant guiding of packing in its pilot hole cover 2, the described wear-resistant guiding cover 2 a plurality of fastening bolts 3 by the bottom surface are fastened in stretching nut 1 pilot hole, endoporus guiding by its wear-resistant guiding cover 2 makes stretching nut 1 internal thread be connected with kingbolt 4 external screw threads.
Described stretching nut 1 screw thread porch, the wear-resistant guiding of packing into cover 2.
Described wear-resistant guiding cover 2 adopts the high-abrasive material of nylon-type to make; Its wear-resistant guiding overlaps between 2 endoporus and kingbolt 4 external screw threads should cooperating of little tolerance clearance.
The dependence wear-resistant guiding overlaps the matched in clearance between 2 endoporus and kingbolt 4 external screw threads, make stretching nut 1 and kingbolt 4 axial lines be in the same theory central line or have in the very little margin of tolerance, the nut 1 of guaranteeing to stretch screws in kingbolt 4 screw threads smoothly, thereby avoid or reduced because being threaded into the guiding deficiency when initial, it is incorrect that internal and external threads screws in initial position, and cause screw thread to grind hindering the generation of accident.
The above; it only is the preferable specific embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; all are familiar with those skilled in the art in the disclosed technical scope of the utility model, are equal to replace or change according to the technical solution of the utility model and design of the present utility model thereof all should be encompassed within the protection domain of the present utility model.
Claims (3)
1. stretching nut guiding mechanism, comprise the stretching nut, the wear-resistant guiding cover, it is characterized in that: its wear-resistant guiding cover center line is consistent with the center line of stretching nut (1), the pilot hole of wear-resistant guiding cover (2) is held in processing one in this stretching nut (1) bottom surface, the wear-resistant guiding cover (2) of packing in its pilot hole, described wear-resistant guiding cover (2) is fastened in stretching nut (1) pilot hole by a plurality of fastening bolts (3) of bottom surface, endoporus guiding by its wear-resistant guiding cover (2) makes stretching nut (1) internal thread be connected with kingbolt (4) external screw thread.
2. by the described stretching nut of claim 1 guiding mechanism, it is characterized in that: in described stretching nut (1) screw thread porch, the wear-resistant guiding cover (2) of packing into.
3. by the described stretching nut of claim 1 guiding mechanism, it is characterized in that: described wear-resistant guiding cover (2) adopts the high-abrasive material of nylon-type to make; Between its wear-resistant guiding cover (2) endoporus and kingbolt (4) external screw thread should there be cooperating of little tolerance clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656738 CN203045287U (en) | 2012-11-29 | 2012-11-29 | Stretching nut guiding mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220656738 CN203045287U (en) | 2012-11-29 | 2012-11-29 | Stretching nut guiding mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203045287U true CN203045287U (en) | 2013-07-10 |
Family
ID=48728283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220656738 Expired - Lifetime CN203045287U (en) | 2012-11-29 | 2012-11-29 | Stretching nut guiding mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203045287U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612115A (en) * | 2013-12-11 | 2014-03-05 | 成都海光核电技术服务有限公司 | Implanting machine for nuclear power plant reactor king bolt and method for implanting bolt |
| CN104551637A (en) * | 2014-12-29 | 2015-04-29 | 中国第一重型机械股份公司 | Screw bolt stretching machine for pressure container |
| CN104551640A (en) * | 2014-12-29 | 2015-04-29 | 中国第一重型机械股份公司 | Full-station bolt stretcher |
-
2012
- 2012-11-29 CN CN 201220656738 patent/CN203045287U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103612115A (en) * | 2013-12-11 | 2014-03-05 | 成都海光核电技术服务有限公司 | Implanting machine for nuclear power plant reactor king bolt and method for implanting bolt |
| CN103612115B (en) * | 2013-12-11 | 2016-03-23 | 成都海光核电技术服务有限公司 | The implanter of nuclear power plant reactor kingbolt and the method for implantation of bolt |
| CN104551637A (en) * | 2014-12-29 | 2015-04-29 | 中国第一重型机械股份公司 | Screw bolt stretching machine for pressure container |
| CN104551640A (en) * | 2014-12-29 | 2015-04-29 | 中国第一重型机械股份公司 | Full-station bolt stretcher |
| CN104551637B (en) * | 2014-12-29 | 2016-12-07 | 中国第一重型机械股份公司 | A kind of bolt stretching machine for pressure vessel |
| CN104551640B (en) * | 2014-12-29 | 2017-03-08 | 中国第一重型机械股份公司 | Full work station bolt stretching machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term |