CN204320996U - A kind of spiral steel pipe pipe end expander - Google Patents
A kind of spiral steel pipe pipe end expander Download PDFInfo
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- CN204320996U CN204320996U CN201420748521.0U CN201420748521U CN204320996U CN 204320996 U CN204320996 U CN 204320996U CN 201420748521 U CN201420748521 U CN 201420748521U CN 204320996 U CN204320996 U CN 204320996U
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Abstract
The utility model relates to a kind of spiral steel pipe pipe end expander, comprise hydrostatic testing machine and expanding head, the Frame for supporting parallel pipes of described hydrostatic testing machine is used for supporting steel pipe and adjustable steel pipe height, and expanding head is fixed on inside the baffle plate of hydrostatic testing machine mobile terminal, and can move thereupon.Expanding head is made up of the adpting flange set gradually, straight section steel pipe, conical section steel pipe and plug steel plate.Expanding head makes by the theoretical internal diameter of standard specification steel pipe, adopts hydrostatic testing machine that expanding head is pressed into end of spirial welded pipe, makes its tube end diameter precision reach requirement.Compared with prior art, the beneficial effects of the utility model are: 1) utilize hydrostatic testing machine to replace steel tube expansion to complete the expanding operation of pipe end, saved nearly 500,000 yuan of equipment investment; 2) make expanding head by oneself and substitute expanding module, save nearly 1,000,000 yuan of equipment part investment; 3) utilize hydrostatic testing machine to carry out expanding operation to steel pipe, need not separately establish finishing line place, reduce enterprise's floor space.
Description
Technical field
The utility model relates to pipe end dressing technique field, particularly relates to a kind of large-caliber spiral pipe end expander.
Background technology
In oil and gas long distance pipeline construction, for convenience of pipe end counterpart assembly welding, need ensure to dock diameter dimension within the scope of the pipe end certain length of steel pipe both sides with ovality close to consistent, and tolerance is comparatively strict.To dimensional accuracy be ensured through pipe end finishing process and eliminate internal stress in the production process of therefore spiral steel pipe; but in spiral steel pipe actual production; the factors such as inaccurate are estimated in fluctuation due to steel plate mechanical performance, the impact on factors such as resiliences, usually there will be the phenomenon that tube end diameter is overproof.
Pipe end diameter needs time less than normal to carry out expanding to steel pipe, the cold expanding method of current conventional machinery, realize with the steel tube expansion with module, but the module of this expanding machine customizes according to steel pipe caliber, and the caliber scope of spiral steel pipe is between φ 219-φ 2540, caliber specification reaches nearly 30 kinds, namely customization 30 kinds of modules are needed, the expanding machine of usual Steel Pipe Enterprise adopts dislocation layout two, that is module needs customization 60 to overlap, different according to the different price of caliber, the larger price of caliber is more expensive, often overlap price between 20,000-15 ten thousand, add the price of expanding machine own also costly, add the cost pressure of enterprise.
Utility model content
The utility model provides a kind of spiral steel pipe pipe end expander, and utilize the hydrostatic testing machine of Steel Pipe Enterprise indispensability to coordinate expanding head to reach and carry out expanding object to steel pipe, fabrication and installation are convenient, simple to operate, significantly reduce entreprise cost pressure.
In order to achieve the above object, the utility model realizes by the following technical solutions:
A kind of spiral steel pipe pipe end expander, comprises hydrostatic testing machine and expanding head, and the Frame for supporting parallel pipes of described hydrostatic testing machine is used for supporting steel pipe and adjustable steel pipe height, and expanding head is fixed on inside the baffle plate of hydrostatic testing machine mobile terminal, and can move thereupon.
Described expanding head is made up of the adpting flange set gradually, straight section steel pipe, conical section steel pipe and plug steel plate, and adpting flange is provided with the flange hole adapted with hydrostatic testing machine mobile terminal baffle plate.
Described conical section steel pipe length is 200 ~ 300mm, and conical section slope is
in formula: the theoretical internal diameter of D-standard specification steel pipe; L-conical section length.
Compared with prior art, the beneficial effects of the utility model are:
1) utilize hydrostatic testing machine to replace steel tube expansion to complete the expanding operation of pipe end, save nearly 500,000 yuan of equipment investment;
2) make expanding head by oneself and substitute expanding module, save nearly 1,000,000 yuan of equipment part investment;
3) utilize hydrostatic testing machine to carry out expanding operation to steel pipe, need not separately establish finishing line place, reduce enterprise's floor space.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the front view of expanding head.
Fig. 3 is the side cutaway view of expanding head.
In figure: 1. baffle plate 14. mobile terminal 15., hydrostatic testing machine 11. stiff end 12. stiff end baffle plate 13. mobile terminal master cylinder 16. Frame for supporting parallel pipes 2. steel pipe 3. expanding head 31. adpting flange 32. straight section steel pipe 33. conical section steel pipe 34. plug steel plate 4. set bolt 5. spring washer
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
See Fig. 1, it is structural representation of the present utility model, a kind of spiral steel pipe pipe end of the utility model expander, comprise hydrostatic testing machine 1 and expanding head 3, the Frame for supporting parallel pipes 16 of described hydrostatic testing machine 1 for supporting steel pipe 2 and adjustable steel pipe 2 height, expanding head 3 is fixed on inside hydrostatic testing machine mobile terminal baffle plate 13, and can move thereupon.
Seeing Fig. 2-Fig. 3, is the structural representation of expanding head 3.Described expanding head 3 is made up of the adpting flange 31 set gradually, straight section steel pipe 32, conical section steel pipe 33 and plug steel plate 34, and adpting flange 31 is provided with the flange hole adapted with hydrostatic testing machine mobile terminal baffle plate 13.
Described conical section steel pipe 33 length is 200 ~ 300mm, and conical section slope is
in formula: the theoretical internal diameter of D-standard specification steel pipe; L-conical section length.
The operation principle of a kind of spiral steel pipe pipe end of the utility model expander is, makes expanding head, adopt hydrostatic testing machine 1 that expanding head 3 is pressed into spiral steel pipe 2 pipe end, make its tube end diameter precision reach requirement by the theoretical internal diameter of standard specification steel pipe.
The using method of a kind of spiral steel pipe of the utility model pipe end expander is as follows:
1) according to standard steel pipe 2 pipe end theoretical internal diameter processing and fabricating expanding head 3, expanding head 3 is arranged on the mobile terminal baffle plate 13 of hydrostatic testing machine 1;
2) will expanding steel pipe 2 be needed to hang onto on the Frame for supporting parallel pipes 16 of hydrostatic testing machine 1, adjustment Frame for supporting parallel pipes 16 makes the expanding end of steel pipe 2 and expanding head 3 axis align; Steel pipe 2 other end is fixed by hydrostatic testing machine stiff end 11;
3) start the master cylinder 15 of hydrostatic testing machine 1, adjustment pressure is 40 ~ 70MPa, and mobile terminal 14 drives expanding head 3 to enter steel pipe 2, and all enter after steel pipe 2 until conical section 33 and stop, mobile terminal 14 returns to original position;
4) measure steel pipe 2 diameter, repeat step 3), until tube end diameter reaches standard-required.
Described expanding head 3 utilizes conical section 33 to realize steel pipe 2 by the transition of tube end diameter to caliber, and conical section 33 length is 200 ~ 300mm, and slope is
in formula: the theoretical internal diameter of D-standard specification steel pipe; L-conical section length.
By standard A PI SPECIFICATION 5L " pipeline steel tube specification " (the 45th edition) requirement, the tolerance of steel pipe 2 tube end diameter is D ± 1.6, and be qualified steel pipe within the scope of this, overproof is substandard product; Simultaneously according to API standard: " except as otherwise outside agreement, the sizing rate of cold expanding steel pipe should not be less than 0.003 and should not be greater than 0.015 8.9.2.8.9.3 except as otherwise outside agreement, sizing rate Sr should adopt formula (1) to calculate:
Sr=|Da-Db|/Db ... formula (1)
Da refers to external diameter after the sizing that manufacturer specifies, and represents with mm (in);
Db refers to external diameter before the sizing that manufacturer specifies, and represents with mm (in);
| Da-Db| refers to the absolute value of external diameter difference, represents with mm (in); "
Enlarging rate is the ratio of enlarged-diameter amount and diameter of steel tube, the utility model setting enlarging rate is 1% ~ 1.5%, i.e. (D-D1)/D1=(0.01 ~ 0.015), in formula, D is the theoretical internal diameter of standard specification steel pipe, and D1 is expanding front pipe diameter; Slope K=(the D-D1)/2L of expanding head, in formula, L is the length of conical section 33, show that the slope of conical section 33 is through converting
Following examples are implemented under premised on technical solutions of the utility model, give detailed embodiment and concrete operating process, but protection domain of the present utility model are not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment 1] specification is the expanding operation of the spiral steel pipe of D529 × 8
Making the theoretical internal diameter of expanding head 3:D529 × 8 standard specification steel pipe is 513mm, and the length L=200mm of setting expanding head 3 conical section 33, coefficient is taken as 0.001, then the slope of conical section 33
namely conical section 33 diameter at butt end is 513mm, and top diameter is 512mm, and theoretical enlarging rate is 0.19%, meets the requirements.
Adopt 20mm steel plate to make adpting flange 31 and plug steel plate 34, straight section steel pipe 32 and conical section steel pipe 33 can adopt same specification steel pipe tube head processing and fabricating to save material.
In Pipe Hydrostatic Test process, hydrostatic testing machine stiff end baffle plate 12 and mobile terminal baffle plate 13 mainly play a part to seal steel pipe 2 pipe end, the water of steel tube pressure-measuring is injected in steel pipe 2 by hydrostatic testing machine stiff end 11, hydrostatic testing machine mobile terminal 14 is pressed on steel pipe 2 other end to realize the sealing to steel pipe 2 pipe end after moving, master cylinder 15 and the hydrostatic testing machine mobile terminal 14 of hydrostatic testing machine 1 are fixed together, and its Main Function balances the pressure that steel pipe 2 produces in pressure testing process.
The utility model makes full use of the pressurization function of hydro tester's main oil cylinder 15, expanding head 3 is fixed on the mobile terminal baffle plate 13 of hydrostatic testing machine 1 by set bolt 4 and spring washer 5, after master cylinder 15 pressurizes, expanding head 3 moves to steel pipe 2 pipe end direction with mobile terminal baffle plate 13, and enters in steel pipe 2 and reach expanding object.
In the present embodiment, the tolerance of steel pipe 2 tube end diameter is D ± 1.6, namely tube end diameter is qualified in (527.4 ~ 530.6) scope, expanding steel pipe 2 measured diameter is needed to be 526.5mm, start the master cylinder 15 of hydrostatic testing machine 1, adjustment pressure is 70MPa, and mobile terminal 14 drives expanding head 3 to enter steel pipe 2, all enter after steel pipe 2 until conical section 33 and stop, mobile terminal 14 returns to original position; Measuring the expanding rear outside dimension of steel pipe 2 is 529.7mm, and reach product standard requirement, actual enlarging rate 0.6%, meets the requirements.
Claims (3)
1. a spiral steel pipe pipe end expander, it is characterized in that, comprise hydrostatic testing machine and expanding head, the Frame for supporting parallel pipes of described hydrostatic testing machine is used for supporting steel pipe and adjustable steel pipe height, expanding head is fixed on inside the baffle plate of hydrostatic testing machine mobile terminal, and can move thereupon.
2. a kind of spiral steel pipe pipe end expander according to claim 1, it is characterized in that, described expanding head is made up of the adpting flange set gradually, straight section steel pipe, conical section steel pipe and plug steel plate, and adpting flange is provided with the flange hole adapted with hydrostatic testing machine mobile terminal baffle plate.
3. a kind of spiral steel pipe pipe end expander according to claim 1, is characterized in that, described conical section steel pipe length is 200 ~ 300mm, and conical section slope is
in formula: the theoretical internal diameter of D-standard specification steel pipe; L-conical section length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420748521.0U CN204320996U (en) | 2014-12-03 | 2014-12-03 | A kind of spiral steel pipe pipe end expander |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420748521.0U CN204320996U (en) | 2014-12-03 | 2014-12-03 | A kind of spiral steel pipe pipe end expander |
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| CN204320996U true CN204320996U (en) | 2015-05-13 |
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| CN201420748521.0U Active CN204320996U (en) | 2014-12-03 | 2014-12-03 | A kind of spiral steel pipe pipe end expander |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475599A (en) * | 2014-12-03 | 2015-04-01 | 中冶辽宁德龙钢管有限公司 | Expanding method and device for spiral steel pipe end |
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2014
- 2014-12-03 CN CN201420748521.0U patent/CN204320996U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104475599A (en) * | 2014-12-03 | 2015-04-01 | 中冶辽宁德龙钢管有限公司 | Expanding method and device for spiral steel pipe end |
| CN104475599B (en) * | 2014-12-03 | 2016-08-24 | 中冶辽宁德龙钢管有限公司 | A kind of spiral steel pipe pipe end diameter enlarging method and expander |
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