CN2434254Y - External steel and internal plastic female thread protector - Google Patents
External steel and internal plastic female thread protector Download PDFInfo
- Publication number
- CN2434254Y CN2434254Y CN 00243716 CN00243716U CN2434254Y CN 2434254 Y CN2434254 Y CN 2434254Y CN 00243716 CN00243716 CN 00243716 CN 00243716 U CN00243716 U CN 00243716U CN 2434254 Y CN2434254 Y CN 2434254Y
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- CN
- China
- Prior art keywords
- injection moulding
- steel
- internal
- moulding blank
- thread
- Prior art date
- 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 - Fee Related
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- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a thread protector for protecting inner threads at the ends of casing tubes of petroleum and various pipes, which is respectively composed of an injection molding blank piece 1 and a steel sleeve 2, wherein, the belt bottom of the injection molding blank piece 1 is a basin shape; the injection molding blank piece 1 and the outer steel sleeve 2 are pressed together for fixation. Numerical control lathes are adopted to process the portions of the inner threads, which ensures design accuracy, and has the advantages of strong shock resistance, high thread precision, etc.
Description
The utility model external-steel internal-plastic internal-thread protector is used for the protection of petroleum casing pipe and various tubing end negative thread.
The screw thread protection device of present similar products at home and abroad; there are full steel structure, overall plastic structure several; but except that full steel structure, all there is a common defective; Here it is because manufacture craft is a single injection-molded; cause the precision of screw thread under the effect of pyrocondensation ratio, to produce error, but full steel structure have shortcomings such as cost height, difficulty of processing be big.
The purpose of the present utility model provides a kind of split assembling, has the external-steel internal-plastic internal-thread protector of high precision screw, and it is that injection moulding blank and steel bushing are processed respectively, is assembled into one then, and threaded portion adopts lathe in machining to form, and guarantees precision.
The utility model external-steel internal-plastic internal-thread protector; the purpose of invention is to realize like this; annular groove (3) is left together in injection moulding blank (1) top; in groove, be provided with some roads reinforced rib; cell wall is low inside and high outside; outer wall protrudes injection moulding blank body; annular shoulder is formed on the bottom; the blank bottom is provided with the end (6); join the formation peviform together with the injection moulding blank; the end (6), be provided with annular boss (7), and steel bushing (2) top is provided with annular eaves (4), and steel bushing (2) is packed in the injection moulding blank (1); after the annular eaves (4) at injection moulding blank top annular groove (3) and steel bushing (2) top closely cooperates; the position outwards stamps out uniform 2 to 4 salient points with steel bushing (2) part in blank, prevents that steel bushing and injection moulding blank from sliding, and forms one.
The utility model external-steel internal-plastic internal-thread protector, owing to adopt the lathe in machining screw thread, maximum characteristics are accuracy of thread height; good, the easy processing of overall performance, cost are low; the outer steel sleeve top is provided with annular eaves, has strengthened the ability of opposing external impact, guarantees that the body screw thread is without prejudice.
The utility model external-steel internal-plastic internal-thread protector has following view and embodiment to provide:
Fig. 1 is the utility model external-steel internal-plastic internal-thread protector front view (band partly cuts open).
The utility model external-steel internal-plastic internal-thread protector is to have injection moulding blank (1), steel bushing (2) assembling to constitute; it is characterized in that: injection moulding blank (1) is for peviform and be with at the end (6); the top is provided with annular groove (3) one circles; be provided with some roads reinforced rib in the groove; cell wall is low inside and high outside; outer wall protrudes injection moulding blank (1); the bottom is provided with shoulder one circle; bottom, the end (6) is provided with boss (7) one circles; steel bushing (2) welds to 4 millimeters thick steel plate ring circle back with 1 millimeter, and adopts drawing process that the outside turnup in steel bushing top is formed annular eaves (4).
After packing into steel bushing (2) in the injection moulding blank (1); annular eaves and injection moulding blank top groove with hydraulic compressor pressing steel bushing top closely cooperate; then; in the middle of the injection moulding blank, steel bushing (2) is outwards stamped out uniform 2 to 4 salient points; embed in the injection moulding blank (1) and form one; go out screw thread (5) with lathe in machining at last, for ease of the dismounting protector, top is provided with symmetrical holes (8).
Claims (3)
1, a kind of external-steel internal-plastic internal-thread protector; be to constitute by injection moulding blank (1), steel bushing (2); it is characterized in that: injection moulding blank (1) is for peviform and be with at the end (6); annular groove (3) is established at the top; cell wall is low inside and high outside, and outer wall protrudes injection moulding blank (1) and is provided with shoulder one circle in the bottom, and the end (6) bottom is provided with boss (7) one circles; steel bushing (2) is thick to be 1 millimeter to 4 millimeters, and the outside turnup in top forms annular eaves (4).
2, it is characterized in that according to the described external-steel internal-plastic internal-thread protector of claim 1: after steel bushing top annular eaves and injection moulding blank top groove (4) closely cooperate; in the middle of the injection moulding blank, steel bushing (2) part is outwards stamped out uniform 2 to 4 salient points, embed in the injection moulding blank (1).
3, it is characterized in that according to claim 1,2 described external-steel internal-plastic internal-thread protectors: be provided with accurate thread (5) in protector injection moulding blank (1) outside, top is provided with hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00243716 CN2434254Y (en) | 2000-07-21 | 2000-07-21 | External steel and internal plastic female thread protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00243716 CN2434254Y (en) | 2000-07-21 | 2000-07-21 | External steel and internal plastic female thread protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2434254Y true CN2434254Y (en) | 2001-06-13 |
Family
ID=33603538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00243716 Expired - Fee Related CN2434254Y (en) | 2000-07-21 | 2000-07-21 | External steel and internal plastic female thread protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2434254Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913457A (en) * | 2010-09-01 | 2010-12-15 | 天津市津英达塑料制品有限责任公司 | External-steel internal-plastic internal-thread protector |
| CN102233975A (en) * | 2010-05-06 | 2011-11-09 | 上海图博可特石油管道涂层有限公司 | Method for protecting thread in process for treating inner surface of double-sealing surface tube used for oil exploitation |
| CN102642665A (en) * | 2012-04-27 | 2012-08-22 | 天津市津英达塑料制品有限责任公司 | Internal thread protector with taper |
| CN104763352A (en) * | 2014-01-02 | 2015-07-08 | 上海图博可特石油管道涂层有限公司 | Protecting sleeve for pipe body threads of short drilling rod for coal bed gas mining and dumping |
-
2000
- 2000-07-21 CN CN 00243716 patent/CN2434254Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102233975A (en) * | 2010-05-06 | 2011-11-09 | 上海图博可特石油管道涂层有限公司 | Method for protecting thread in process for treating inner surface of double-sealing surface tube used for oil exploitation |
| CN102233975B (en) * | 2010-05-06 | 2013-05-01 | 上海图博可特石油管道涂层有限公司 | Method for protecting thread in process for treating inner surface of double-sealing surface tube used for oil exploitation |
| CN101913457A (en) * | 2010-09-01 | 2010-12-15 | 天津市津英达塑料制品有限责任公司 | External-steel internal-plastic internal-thread protector |
| CN102642665A (en) * | 2012-04-27 | 2012-08-22 | 天津市津英达塑料制品有限责任公司 | Internal thread protector with taper |
| CN104763352A (en) * | 2014-01-02 | 2015-07-08 | 上海图博可特石油管道涂层有限公司 | Protecting sleeve for pipe body threads of short drilling rod for coal bed gas mining and dumping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |