CN200961240Y - Prestress dragline loose-proof protection device - Google Patents
Prestress dragline loose-proof protection device Download PDFInfo
- Publication number
- CN200961240Y CN200961240Y CN 200620119159 CN200620119159U CN200961240Y CN 200961240 Y CN200961240 Y CN 200961240Y CN 200620119159 CN200620119159 CN 200620119159 CN 200620119159 U CN200620119159 U CN 200620119159U CN 200961240 Y CN200961240 Y CN 200961240Y
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- China
- Prior art keywords
- drag
- line
- lower spring
- spring base
- protective device
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- Expired - Fee Related
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Abstract
The utility model relates to a pre-stressed drag-line anti-loose protective device comprising a steel sleeve of which the inner wall of two terminals is provided with a block respectively, a cylinder upper and lower spring base which is positioned in the hole of the steel sleeve and between the two blocks, wherein a helical circular arc groove is provided on the circumferential outer surface of the upper and lower spring base and an axial screwed hole is provided on the middle portion, a tension spring of which the upper and lower ends are fixedly wound on the helical circular arc groove of the upper and lower spring base respectively, a terminal connecting bar of which the upper end has external screws corresponding to the screw holes of the lower spring base. In the case that the terminal portion structure of the drag-line is a little deformed, the drag-line anti-loose protective device of the utility model is capable of greatly diminishing the pulling force variation compare to that when the anti-loose protective device is not provided, and the drag-line is capable of keeping relative stable pulling force without evident loosing. The utility model also has lower demand to force application of the fixing structure of the drag-line terminal portion, thereby lowering down the producing cost.
Description
Technical field
The utility model belongs to civil construction project, relates in particular to the locking protective device of a kind of prestressed cable.
Background technology
Prestressed cable extensively is used in civil construction project.Many engineering structuress have used drag-line as tensional element, drag-line has also played effect attractive in appearance simultaneously, and drag-line itself is owing to exist certain deadweight, must give the certain pulling force of drag-line (following will overcome the drag-line deadweight make drag-line be called standard tension) in order to guarantee that drag-line is not loose at the not loose pressure of normality, and the situation of tension variations can appear in drag-line when reality is used, be that the stay cable end fixed structure has some distortion under wind load or temperature action, and the stay cable end fixed structure have slightly distortion will cause at once the reducing of pulling force in the drag-line (following with the drag-line pulling force reduce to be called change pulling force), still not loose in order to make the drag-line pulling force reduce backstay, then must make in the structure the suffered pulling force of drag-line be not less than standard tension and change pulling force sum (following with standard tension with change the pulling force sum and be called actual pulling force).Actual pulling force is too big, can be unfavorable to overall structure, also increased the force request of stay cable end fixed structure simultaneously, and improved construction cost.In addition, if the variation pulling force of drag-line also can cause being subjected to the adverse effect of pull-up structure too greatly.
From the above, change the force request that reduces then can reduce the stay cable end fixed structure of pulling force, reducing the construction costs, and can not have a negative impact to being subjected to pull-up structure, reducing of variation pulling force is the problem that building trade presses for solution.
Summary of the invention
The purpose of this utility model provides a kind of locking protective device of prestressed cable that can effectively reduce drag-line variation pulling force.
For achieving the above object, the utility model is taked following design scheme: the locking protective device of a kind of prestressed cable is characterized in that it comprises:
Steel sleeve, described steel sleeve two ends inwall is respectively equipped with a block;
Cylindrical upper and lower spring base in described steel bushing pore between two blocks, the circumferential outer surface of described upper and lower spring base is provided with the helical form arc groove, and described upper and lower spring base middle part is provided with the axial thread hole;
Tension spring, the upper and lower end of described tension spring curl up respectively on the helical form arc groove that is fixed on described upper and lower spring base;
The end connecting rod, connecting rod upper end in described end has the external screw thread that matches with described lower spring cup screwed hole.
It comprises that also one is screwed onto a lower spring cup locknut and the upper spring seat nut on the connecting rod of end.
The utility model has the advantages that:
1; the locking protective device of the utility model prestressed cable is owing to adopt above-mentioned design scheme; during use; tapered end bolt with upper spring seat and upper spring seat nut and drag-line; the end connecting rod is connected with the end fixed structure; tension spring in the utility model plays cushioning effect on the one hand; on the other hand; because the stiffness of tension spring is little more a lot of than drag-line; rigidity after tension spring and drag-line are together in series is significantly smaller than the rigidity of single drag-line itself; therefore the stay cable end structure has distortion slightly; the locking protective device of this drag-line in the time of can allowing the drag-line tension variations than no locking protective device little a lot; the variation pulling force that is drag-line is less; the pulling force that can keep relative stability in the drag-line; make drag-line can be because stay cable end fixed structure distortion lax influence attractive in appearance, make structure keep good stress, the actual pulling force of corresponding drag-line is also less; force request to the stay cable end fixed structure is also lower, the construction cost of reduction.
2, the locking protective device of the utility model prestressed cable, wherein the outer steel sleeve of tension spring plays pulling force and surpasses under the situation of tension spring bearing capacity tension spring is shielded, and also plays to allow tension spring ensconce beauty function in the steel sleeve.
3, the locking protective device of the utility model prestressed cable wherein adopts tension spring to reduce the rigidity of protective device, and tension spring is in tension state in structure, so tension spring can be done longly and problem of unstable can not occur.
Description of drawings
Fig. 1 is the utility model structural representation
The specific embodiment
As shown in Figure 1, the locking protective device of a kind of prestressed cable of the utility model is characterized in that it comprises:
Cylindrical upper and lower spring base 3,4 in steel sleeve 1 hole between two blocks 2, the circumferential outer surface of upper and lower spring base 3,4 is provided with the helical form arc groove, upper and lower spring base 3,4 middle parts are provided with the axial thread hole, and 2 pairs of upper and lower spring bases 3,4 of two blocks play spacing effect;
Tension spring 6, the upper and lower end of tension spring 6 curl up respectively on the helical form arc groove that is fixed on upper and lower spring base 3,4;
End connecting rod 7, connecting rod 7 upper ends in end have the external screw thread that matches with lower spring cup 4 screwed holes.
It comprises that also one is screwed onto a lower spring cup locknut 8 and the upper spring seat nut 9 on the end connecting rod 7, lower spring cup locknut 8 can prevent that the connection between end connecting rod 7 and the lower spring cup 4 is loosening, be screwed onto jointly on the drag-line termination 10 during upper spring seat nut 9 and upper spring seat 3 use, upper spring seat nut 9 can prevent that the connection between upper spring seat 3 and the drag-line termination 10 is loosening.
Claims (2)
1, the locking protective device of a kind of prestressed cable is characterized in that it comprises:
Steel sleeve, described steel sleeve two ends inwall is respectively equipped with a block;
Cylindrical upper and lower spring base in described steel bushing pore between two blocks, the circumferential outer surface of described upper and lower spring base is provided with the helical form arc groove, and described upper and lower spring base middle part is provided with the axial thread hole;
Tension spring, the upper and lower end of described tension spring curl up respectively on the helical form arc groove that is fixed on described upper and lower spring base;
The end connecting rod, connecting rod upper end in described end has the external screw thread that matches with described lower spring cup screwed hole.
2, the locking protective device of prestressed cable according to claim 1 is characterized in that, it comprises that also one is screwed onto a lower spring cup locknut and the upper spring seat nut on the connecting rod of end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620119159 CN200961240Y (en) | 2006-08-21 | 2006-08-21 | Prestress dragline loose-proof protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620119159 CN200961240Y (en) | 2006-08-21 | 2006-08-21 | Prestress dragline loose-proof protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200961240Y true CN200961240Y (en) | 2007-10-17 |
Family
ID=38797749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620119159 Expired - Fee Related CN200961240Y (en) | 2006-08-21 | 2006-08-21 | Prestress dragline loose-proof protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200961240Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667218A (en) * | 2019-01-11 | 2019-04-23 | 朱婧 | Arch bridge suspender anti-loosening constructs system |
| CN112227186A (en) * | 2020-11-30 | 2021-01-15 | 乐陵市平照公路工程有限公司 | Bridge inhaul cable anti-loosening device |
-
2006
- 2006-08-21 CN CN 200620119159 patent/CN200961240Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667218A (en) * | 2019-01-11 | 2019-04-23 | 朱婧 | Arch bridge suspender anti-loosening constructs system |
| CN112227186A (en) * | 2020-11-30 | 2021-01-15 | 乐陵市平照公路工程有限公司 | Bridge inhaul cable anti-loosening device |
| CN112227186B (en) * | 2020-11-30 | 2022-09-13 | 乐陵市平照公路工程有限公司 | Bridge inhaul cable looseness prevention device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA METALLURGICAL BUILDING GENERAL RESEARCH INST Free format text: FORMER OWNER: CHINA JINGYE CONSTRUCTION ENGINEERING CONTRACT CO.,LTD. Effective date: 20091211 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091211 Address after: Beijing city Haidian District Xitucheng Road 33, zip code: 100088 Co-patentee after: China Jingye Engineering Technology Co., Ltd. Patentee after: China metallurgy Architecture Research Institute Co., Ltd. Address before: Beijing city Haidian District Xitucheng Road 33, zip code: 100088 Co-patentee before: Shang Renjie Patentee before: China Beijing metallurgy construction project contract firms Co-patentee before: Wu Zhuanqin Co-patentee before: Zhou Jianfeng Co-patentee before: Li Qian Co-patentee before: Gong Xisheng Co-patentee before: Liu Jingliang |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20110821 |