CN203476986U - Steel pipeline expanding pull rod connecting device - Google Patents
Steel pipeline expanding pull rod connecting device Download PDFInfo
- Publication number
- CN203476986U CN203476986U CN201320549990.5U CN201320549990U CN203476986U CN 203476986 U CN203476986 U CN 203476986U CN 201320549990 U CN201320549990 U CN 201320549990U CN 203476986 U CN203476986 U CN 203476986U
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- China
- Prior art keywords
- pull rod
- pull bar
- circular arc
- arc bottom
- steel pipeline
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Abstract
The utility model relates to a steel pipeline expanding pull rod connecting device which comprises a pull rod. The front end of the pull rod is connected with an expanding head through a first connector. The rear end of the pull rod is connected with an expanding device through a second connector. The first connector and the second connector adopt nuts. Two ends of the pull rod are respectively machined into arc-bottom outer threads. Each nut adopts arc-bottom inner threads. The nuts are connected with the pull rod through the arc-bottom threads. The steel pipeline expanding pull rod connecting device is compact and reasonable in structure, convenient to manufacture, good in axial stress, and good in pull rod connection reliability, the front end and the rear end of the pull rod are connected through coarse pitch arc-bottom threads, connection strength of the pull rod is enhanced greatly, the application requirements of the pull rod are satisfied, the sharp angle stress of common triangular threads is eliminated by adopting the arc-bottom threads, and the service life of the pull rod is prolonged.
Description
Technical field
The utility model relates to hole enlargement equipment technical field, especially a kind of steel pipeline hole enlargement pull rod connection device.
Background technique
At present, on market, the manufacturer of production hole enlargement pull bar seldom, produces that to have the manufacturer of the hole enlargement pull bar that the performances such as high hardness, tensile strength and toughness are qualified few especially.Domestic market mainly depends on import, but import price is expensive, and the cycle is long, affects duration and partner's interests.10,000 steel pipe left and right of the maximum hole enlargements of common common pull bar.
In prior art, as shown in Figure 1, the structural representation of pull bar in prior art, comprises pull bar 2, and the front end of described pull bar 2 is connected with expanding head by the first link 1, and the rear end of described pull bar 2 is by the second link 3 and hole enlargement equipment connection; Described the first link 1 and the second link 3 all adopt nut 4; As shown in Figures 2 and 3, the front end of pull bar 2 and rear end are processed with respectively common outside thread 6, and nut 4 is common internal thread 5, described nut 4 is connected by regular screw threads with pull bar 2, and it is simple in structure, and cost is low, but the axially loaded of pull bar 2 is little, and screw thread is easy to wear, and pull bar is short 2 working lifes.As shown in Figure 4 and Figure 5, the front end of pull bar 2 and rear end are processed with respectively trapezoidal outside thread 8, nut 4 is trapezoidal internal thread 7, described nut 4 is connected by trapezoidal thread with pull bar 2, it is simple in structure, although the axially loaded of trapezoidal thread is large, self-locking performance is poor, unreliable in pull bar 2 using processs, the impact tube quality of processing.
Model utility content
The applicant, for the shortcoming in above-mentioned existing production technology, provides a kind of steel pipeline hole enlargement pull rod connection device, thereby improves connection reliability, effectively avoid the little defect of axially loaded in prior art, greatly increased the intensity of pull bar, safe and reliable, long service life.
The technological scheme that the utility model adopts is as follows:
A kind of steel pipeline hole enlargement pull rod connection device, comprise pull bar, the front end of described pull bar is connected with expanding head by the first link, the rear end of described pull bar is by the second link and hole enlargement equipment connection, described the first link and the second link all adopt nut, circular arc bottom outside thread is processed into respectively at the two ends of described pull bar, and described nut adopts circular arc bottom internal thread, and described nut is connected with pull bar by circular arc bottom screw thread.
Further improvement as technique scheme:
The radius of arc a of described circular arc bottom internal thread is 0.8mm-4mm;
The externally threaded radius of arc b of described circular arc bottom is 4mm-8mm;
The pitch c of described circular arc bottom outside thread and circular arc bottom internal thread is 16mm-24mm.
The beneficial effects of the utility model are as follows:
The utility model compact structure, reasonable, easy to make, pull bar front end adopts respectively large screw pitch circular arc bottom to be threaded with rear end, greatly strengthened the join strength of pull bar, axially loaded is good, meets pull bar usage requirement, adopts circular arc bottom to be threaded simultaneously and has eliminated the wedge angle stress that adopts common v thread, pull bar connection reliability is good, increases the service life.
Accompanying drawing explanation
Fig. 1 is the scheme of installation of pull bar in prior art.
Fig. 2 is that in prior art, nut is connected explosive view (regular screw threads) with pull bar.
Fig. 3 is the structural representation (regular screw threads) of nut after being connected with pull bar in prior art.
Fig. 4 is that in prior art, nut is connected explosive view (trapezoidal thread) with pull bar.
Fig. 5 is the structural representation (trapezoidal thread) of nut after being connected with pull bar in prior art.
Fig. 6 is that the utility model nut is connected explosive view (circular arc bottom worm structure) with pull bar.
Fig. 7 is the structural representation (circular arc bottom worm structure) after the utility model nut is connected with pull bar.
Wherein: 1, the first link; 2, pull bar; 3, the second link; 4, nut; 5, common internal thread; 6, common outside thread; 7, trapezoidal internal thread; 8, trapezoidal outside thread; 9, circular arc bottom internal thread; 10, circular arc bottom outside thread.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.
As shown in Figure 6 and Figure 7, the steel pipeline hole enlargement pull rod connection device of the present embodiment, comprise pull bar 2, the front end of pull bar 2 is connected with expanding head by the first link 1, the rear end of pull bar 2 is by the second link 3 and hole enlargement equipment connection, and the first link 1 and the second link 3 all adopt nut 4, and circular arc bottom outside thread 10 is processed into respectively at the two ends of pull bar 2, nut 4 adopts circular arc bottom internal thread 9, and nut 4 is connected with pull bar 2 by circular arc bottom screw thread.
The radius of arc a of circular arc bottom internal thread 9 is 0.8mm-4mm.
The radius of arc b of circular arc bottom outside thread 10 is 4mm-8mm.
Circular arc bottom outside thread 10 is 16mm-24mm with the pitch c of circular arc bottom internal thread 9.
The diameter of expanding head pull bar 2 described in the utility model is 165mm, and adopting the radius of arc a of circular arc bottom internal thread 9 is 0.8mm, and adopting the radius of arc b of circular arc bottom outside thread 10 is 4mm, and circular arc bottom outside thread 10 is 16mm with the pitch c of circular arc bottom internal thread 9.
In actual using process, by the front end at pull bar 2 and rear end, be processed into respectively circular arc bottom outside thread 10, and process the nut 4 with circular arc bottom internal thread 9, at the two ends of pull bar 2, screw respectively.Easy for installation, cost is low.
More than describing is to explanation of the present utility model, is not the restriction to model utility, and the utility model limited range, referring to claim, within protection domain of the present utility model, can be done any type of modification.
Claims (4)
1. a steel pipeline hole enlargement pull rod connection device, comprise pull bar (2), the front end of described pull bar (2) is connected with expanding head by the first link (1), the rear end of described pull bar (2) is by the second link (3) and hole enlargement equipment connection, described the first link (1) and the second link (3) all adopt nut (4), it is characterized in that: circular arc bottom outside thread (10) is processed into respectively at the two ends of described pull bar (2), described nut (4) adopts circular arc bottom internal thread (9), and described nut (4) is connected with pull bar (2) by circular arc bottom screw thread.
2. steel pipeline hole enlargement pull rod connection device as claimed in claim 1, is characterized in that: the radius of arc (a) of described circular arc bottom internal thread (9) is 0.8mm-4mm.
3. steel pipeline hole enlargement pull rod connection device as claimed in claim 1, is characterized in that: the radius of arc (b) of described circular arc bottom outside thread (10) is 4mm-8mm.
4. steel pipeline hole enlargement pull rod connection device as claimed in claim 1, is characterized in that: described circular arc bottom outside thread (10) is 16mm-24mm with the pitch (c) of circular arc bottom internal thread (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549990.5U CN203476986U (en) | 2013-09-05 | 2013-09-05 | Steel pipeline expanding pull rod connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549990.5U CN203476986U (en) | 2013-09-05 | 2013-09-05 | Steel pipeline expanding pull rod connecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203476986U true CN203476986U (en) | 2014-03-12 |
Family
ID=50225322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320549990.5U Expired - Fee Related CN203476986U (en) | 2013-09-05 | 2013-09-05 | Steel pipeline expanding pull rod connecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203476986U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452987A (en) * | 2013-09-05 | 2013-12-18 | 无锡双友石化机械有限公司 | Pipeline expansion pull rod connecting device for steel pipe |
-
2013
- 2013-09-05 CN CN201320549990.5U patent/CN203476986U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452987A (en) * | 2013-09-05 | 2013-12-18 | 无锡双友石化机械有限公司 | Pipeline expansion pull rod connecting device for steel pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Wei Inventor after: Zhang Jianjun Inventor after: Chen Wenbao Inventor after: Zhao Dong Inventor after: Wu Zhengdong Inventor after: Geng Dong Inventor before: Xu Wei Inventor before: Zhang Jianjun Inventor before: Chen Wenbao Inventor before: Zhao Dong Inventor before: Wu Zhendong Inventor before: Geng Dong |
|
| CP03 | Change of name, title or address |
Address after: 214161 lakes in Jiangsu province Wuxi City foreshore Hu Dai Shu Lu Yang Industrial Park, No. 28 Patentee after: Jiangsu two friends intelligent equipment Polytron Technologies Inc Address before: 214161 lakes in Jiangsu province Wuxi City foreshore Hudai Industrial Park North Link Road No. three Patentee before: Wuxi Sunyou General Machine Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20160905 |