CN201133543Y - Drawing type inner expanding plug - Google Patents
Drawing type inner expanding plug Download PDFInfo
- Publication number
- CN201133543Y CN201133543Y CNU200720077069XU CN200720077069U CN201133543Y CN 201133543 Y CN201133543 Y CN 201133543Y CN U200720077069X U CNU200720077069X U CN U200720077069XU CN 200720077069 U CN200720077069 U CN 200720077069U CN 201133543 Y CN201133543 Y CN 201133543Y
- Authority
- CN
- China
- Prior art keywords
- pull
- expanding plug
- gland nut
- plug
- nut
- 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 - Lifetime
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Abstract
The utility model relates to a pull-type in-expanding plug, which comprises a pull screw, a gland nut, a clamping bush and a seal ring. One end of the pull screw is connected with one end of the clamping bush through the gland nut. The other end of the clamping bush is provided with the seal ring. The pull-type in-expanding plug is characterized in that the gland nut and the outer end of the clamping bush are provided with a pressure pad through a pull nut; the other end of the pull screw is provided with a turning stop dog. The pull-type in-expanding plug has the advantage that the pull-type in-expanding plug can solve the non-weld sealing problem of pipe orifices, in particular to the short pipe orifices during hydraulic pressure tests of boilers and pressure vessels.
Description
Technical field
The utility model relates to the plug that expands in a kind of drawing formula, relates in particular to the plug that expands in the drawing formula of the ferrule of a kind of boiler pressure part when doing the hydrostatic test, belongs to the Sealing technical field.
Background technique
At present, boiler industry is in manufacture course of products, ferrule when pressure containing part is done the hydrostatic test, the interior bloated plug of no-welding type wherein is because its bloated hermetic unit is longer, usually be only applicable to than the long tube joint, and for less than 150mm than source nipple, the larger-diameter sealing of Φ＞60mm, plug expands in can not adopting, can only lean on screw, bloated sheet to carry out, its shortcoming is that sealing load is low.
Summary of the invention
The purpose of this utility model provides the plug that expands in a kind of drawing formula, solves boiler, pressurized container each mouth of pipe non-welded seal problem of short tube mouth especially when the hydrostatic test.
For realizing above purpose, the technical solution of the utility model provides the plug that expands in a kind of drawing formula, comprise drawing screw rod, gland nut, clamping sleeve and seal ring, one end of drawing screw rod is connected with clamping sleeve one end by gland nut, the other end of clamping sleeve is provided with seal ring, it is characterized in that, be provided with pressure pad by the drawing nut, be provided with the upset block at the other end of drawing screw rod at gland nut and clamping sleeve outer end.
The utility model makes Sealing under the synergy of drawing screw rod and gland nut by the design of upset block and a drawing screw rod, can location, swelling exactly in the limited length range of source nipple inwall, thus realize the ferrule function.
The utility model has the advantages that:
1. can solve the pump water-stop problem of the pipe joint of the little L of diameter length, sealing load can reach 200kg/cm
2-300kg/cm
2, caliber can reach about 300mm;
2. can not have hydraulic pressure test surplus or pipe end groove at pipe and carry out the hydrostatic test under the situation of completion of processing;
3. can save the hydrostatic test surplus of pipe, save material.
Description of drawings
Fig. 1 is the plug structure schematic representation that expands in a kind of drawing formula.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment
As shown in Figure 1, be the plug structure schematic representation that expands in a kind of drawing formula, the plug that expands in described a kind of drawing formula is made up of drawing screw rod 1, drawing nut 2, pressure pad 3, gland nut 4, clamping sleeve 5, seal ring 6 and upset block 7.
One end of drawing screw rod 1 is connected with clamping sleeve 5 one ends by gland nut 4, and the other end of clamping sleeve 5 is provided with seal ring 6, is provided with pressure pad 3 at gland nut 4 and clamping sleeve 5 outer ends by drawing nut 2, is provided with the block 7 that overturns at the other end of drawing screw rod 1.
During work, assemble the plug that expands in the drawing formula, pressure pad 3 is not temporarily adorned, it is that the A end is preceding that upset block 7 changes horizontal position, B end after, the drawing screw rod 1 that will have flip horizontal block 7 is sent into pipe joint 9, after upset block A held cylindrical shell 8 inwalls, A holds sagging feasible upset block 7 vertical, expand in the mobile outward drawing formula and fill in, make upset block 7 be close to cylinder inboard wall, load onto pressure pad 3 and screw drawing nut 2, screw gland nut 4 again, seal ring 6 is swollen and seal.
Claims (1)
1. interior the expanding of drawing formula filled in, comprise drawing screw rod (1), gland nut (4), clamping sleeve (5) and seal ring (6), one end of drawing screw rod (1) is connected with clamping sleeve (5) one ends by gland nut (4), the other end of clamping sleeve (5) is provided with seal ring (6), it is characterized in that, be provided with pressure pad (3) in gland nut (4) and clamping sleeve (5) outer end by drawing nut (2), be provided with the block (7) that overturns at the other end of drawing screw rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720077069XU CN201133543Y (en) | 2007-12-24 | 2007-12-24 | Drawing type inner expanding plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720077069XU CN201133543Y (en) | 2007-12-24 | 2007-12-24 | Drawing type inner expanding plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201133543Y true CN201133543Y (en) | 2008-10-15 |
Family
ID=40061815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720077069XU Expired - Lifetime CN201133543Y (en) | 2007-12-24 | 2007-12-24 | Drawing type inner expanding plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201133543Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672717B (en) * | 2009-08-28 | 2011-03-02 | 无锡海源重工股份有限公司 | Water pressure inner expansion plug device |
| CN111289372A (en) * | 2020-03-03 | 2020-06-16 | 哈尔滨锅炉厂有限责任公司 | Short pipe joint external-pulling internal-expanding type hydraulic tool and using method thereof |
-
2007
- 2007-12-24 CN CNU200720077069XU patent/CN201133543Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672717B (en) * | 2009-08-28 | 2011-03-02 | 无锡海源重工股份有限公司 | Water pressure inner expansion plug device |
| CN111289372A (en) * | 2020-03-03 | 2020-06-16 | 哈尔滨锅炉厂有限责任公司 | Short pipe joint external-pulling internal-expanding type hydraulic tool and using method thereof |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081015 |