CN202691437U - Expansion plug for seamless steel tube - Google Patents
Expansion plug for seamless steel tube Download PDFInfo
- Publication number
- CN202691437U CN202691437U CN 201220350363 CN201220350363U CN202691437U CN 202691437 U CN202691437 U CN 202691437U CN 201220350363 CN201220350363 CN 201220350363 CN 201220350363 U CN201220350363 U CN 201220350363U CN 202691437 U CN202691437 U CN 202691437U
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- CN
- China
- Prior art keywords
- seamless steel
- expansion plug
- stifled
- force handle
- resistant rubber
- 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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Abstract
The utility model discloses an expansion plug for a seamless steel tube and belongs to the technical field of an air-tight test and a withstand voltage test of a mechanical pipeline. The expansion plug for the seamless steel tube mainly comprises an oil-resistant rubber expansion plug and a set of pressing device; the pressing device fixedly connects a fixed pressure plate and one end of a lock screw together; and the oil-resistant rubber expansion plug, a movable pressure plate, a main force grip and a fixed force grip are orderly arranged on the lock screw. Only the oil-resistant rubber expansion plug is arranged inside the seamless steel tube, the movable pressure plate can be compelled to move by rotating the main force grip under the situation of keeping the fixed force grip fixed because a connection thread on the main force grip and a screw section on the lock screw are in threaded connection in a matching manner, and the oil-resistant rubber expansion plug is compelled to increase the outer diameter, and plays a role in reliably sealing sealing the seamless steel tube. The expansion plug for the seamless steel tube is simple in structure, low in cost, simple in operation, reliable in dead lock and wide in purpose, and can be repeatedly used without damaging a test main body.
Description
Technical field
It is stifled with expanding that the utility model relates to a kind of seamless steel pipe, belongs to mechanical pipeline and carry out air tightness test and pressure test technical field.
Background technique
Boats and ships will be laid numerous oil gas waterpipes in building course, these pipelines will carry out air tightness test and pressure test in process of deployment.And most of pipeline carried out air tightness test and pressure test before various valve installations, its objective is to find out manufacturing deficiency that pipeline exists and welding sand holes etc. in process of deployment.Traditional pipeline test technology be on pipeline the welding method orchid to block pipeline.This technique is not suitable for being applied in the pressure testing of ship pipeline, and reason one: the boats and ships upper pipeline is a lot, needs a large amount of flange frocks, also needs artificial welding, also will cut off these flange frocks after pressure testing is finished, and wastes a large amount of manpower and materials.Reason two: shipbuilding technology does not allow its pipeline is damaged yet.Dalian boats and ships heavy industry Co., Ltd is to use stopper to replace tratitional technology to carry out the pipeline test in building the boats and ships process now.Wood is processed to the stopper of corresponding seamless steel pipe internal diameter size, firmly squeezes into iron hammer during use, after air tightness test and pressure test are finished, stopper is extracted again.
The shortcoming of this technique:
1, stopper can only use once, a large amount of stopper of usefulness that boats and ships are wanted.Be unfavorable for ecological protection.
2, stopper hammers into unreliablely, and stopper easily ejects in the process of the test.
3, stopper is extracted difficulty, for stopper in process of the test is not ejected, has used very large strength when stopper hammers into, and this causes stopper not to be drawn out easily.Sometimes roasting with fire.
4, sometimes in a conned space, stopper is difficult for hammering into, and some mouth of pipe is too near apart from wall.
Summary of the invention
In order to solve problems of the prior art, the utility model provides a kind of seamless steel pipe stifled with expanding, and this expansion bridging structure is simple, with low cost, simple to operate, locked reliable, reusable, and Test section is not caused damage, of many uses.
The technical solution adopted in the utility model is: a kind of seamless steel pipe blocks up with expanding and comprises that mainly an oil resistant rubber expansion is stifled, it also comprises the hold down gag that a described oil resistant rubber expands and blocks up, described hold down gag adopts a stationary platen to become to be fixedly connected with an end of a locking screw, is provided with successively on locking screw that the oil resistant rubber expansion is blocked up, movable pressure plate, main application of force handle and fixing application of force handle; Connecting thread on the described main application of force handle and being threaded that the spiro rod section on the locking screw becomes to cooperatively interact.
Locking screw between described movable pressure plate and main application of force handle is provided with a sleeve pipe.
The threaded end of described locking screw is provided with a flat connecting head, and an end of described fixedly application of force handle is provided with a flat attachment hole, and the flat connecting head is worked in coordination into the flat attachment hole and is fixedly connected with.
End at described main application of force handle is provided with connecting thread, or welds the nut with connecting thread at an end of described main application of force handle.
The beneficial effects of the utility model are: this seamless steel pipe blocks up with expanding and comprises that mainly an oil resistant rubber expands stifled and a cover compression device, hold down gag is fixed together an end of stationary platen and locking screw, is provided with successively oil resistant rubber expand stifled, movable pressure plate, main application of force handle and fixing application of force handle on locking screw.As long as the stifled seamless steel pipe that places of oil resistant rubber expansion, because the connecting thread on the main application of force handle and being threaded that the spiro rod section on the locking screw becomes to cooperatively interact, in the situation that keep that fixedly application of force handle is motionless, just can force movable pressure plate to move as long as rotate main application of force handle, the compressing oil resistant rubber expands and blocks up the external diameter increase, and seamless steel pipe is played reliable sealing process.This expansion bridging structure is simple, with low cost, simple to operate, locked reliable, reusable, and Test section is not caused damage, of many uses.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the structural drawing that a kind of seamless steel pipe blocks up with expansion.
Fig. 2 is the structural drawing that the seamless steel pipe of another kind of single face blocks up with expansion.
Fig. 3 is the structural drawing of locking screw.
Fig. 4 is the structural drawing of main application of force handle.
Fig. 5 is the fixing structural drawing of application of force handle.
Among the figure: 1, fixing application of force handle, 1a, flat attachment hole, 2, socket head screw, 3, spring pad, 4, plain cushion, 5, locking screw, 5a, spiro rod section, 5b, flat connecting head, 6, main application of force handle, 6a, connecting thread, 7, movable pressure plate, 7a, stationary platen, 8, oil resistant rubber expands stifled, 9, sleeve pipe, 10, seamless steel pipe.
Embodiment
The below is further described embodiment with reference to the accompanying drawings.
Fig. 1,3,4,5 shows the structural drawing that a kind of seamless steel pipe blocks up with expansion.Among the figure, expand stifled 8 hold down gag of oil resistant rubber adopts a stationary platen 7a to become to be welded to connect with an end of a locking screw 5, loads onto successively on locking screw 5 that the oil resistant rubber expansion blocks up 8, movable pressure plate 7, main application of force handle 6 and fixing application of force handle 1.Nut with connecting thread 6a of one end of main application of force handle 6 welding, this nut and being threaded that spiro rod section 5a on the locking screw 5 becomes to cooperatively interact.The threaded end of locking screw 5 is provided with a flat connecting head 5b, fixedly an end of application of force handle 1 is provided with a flat attachment hole 1a, flat connecting head 5b works in coordination into flat attachment hole 1a and is fixedly connected with, and it is fastening that plain cushion 4, spring pad 3 and socket head screw 2 are set.
Fig. 2 shows the seamless steel pipe stifled structural drawing that expands of another kind of single face.Locking screw 5 between movable pressure plate 7 and the main application of force handle 6 is provided with a sleeve pipe 9.In this case, locking screw 5 lengthens, to satisfy the needs of various construction environments.
Above-mentioned technological scheme working principle is as follows: during use, and the firmly inside main application of force handle 6 of promotion and fixedly application of force handle 1, the axial force that screw thread rotation produces is applied on the movable pressure plate 7.Make movable pressure plate 7 and stationary platen 7a push together the rubber oil resistant and expand stifled 8, external diameter increased after the rubber oil resistant expanded and blocks up 8 pressurizeds, produce the radial force of extruding steel pipe walls, fixedly application of force handle 1 and main application of force handle 6 relative rotations are larger, and the stifled generation of expanding is just larger to the radial force of steel pipe walls.Because the unlubricated friction coefficient between rubber and the metal is 0.8, so 80% frictional force that is converted between the stifled and steel pipe of rubber of extruding force.This frictional force is exactly the resistance that overcomes hydraulic pressure or air pressure, thereby makes the stifled seamless steel pipe mouth that gets lodged in firmly that expands.
Above-mentioned technological scheme using method: according to the size of required test caliber, select the expansion of suitable types stifled, wipe clean the mouth of pipe, the residual of any fluid must not be arranged.Stifled the insertion in the seamless steel pipe of expanding, guarantee that movable pressure plate 7 submerges the seamless steel pipe mouth more than 50%.Firmly the inwardly main application of force handle 6 of promotion and fixedly application of force handle 1 according to the size of need pound pressure, as much as possible inwardly push away two handles.The promotion amount is larger, and the liquid that bears or the pressure of gas are larger.
After the seamless steel pipe pound is pressed and to be finished, outwards promote main application of force handle 6 and fixedly application of force handle 1 discharge extruding force, rubber body both resiled.Expand to block up and just can successfully in steel pipe, take out.
Expansion through overtesting DN50 is stifled, gets lodged on the seamless steel pipe of DN50, and the stifled line silk that expands when test pressure reaches 5.0MPa is not moving.Can easily not take out to expand by any instrument and block up.
Claims (4)
1. a seamless steel pipe is stifled with expanding, it mainly comprises an oil resistant rubber expansion stifled (8), it is characterized in that: it also comprises the hold down gag of a described oil resistant rubber expansion stifled (8), described hold down gag adopts a stationary platen (7a) to become to be fixedly connected with an end of a locking screw (5), is provided with successively the oil resistant rubber expansion and blocks up (8), movable pressure plate (7), main application of force handle (6) and fixing application of force handle (1) on locking screw (5); Connecting thread (6a) on the described main application of force handle (6) and being threaded that spiro rod section (5a) on the locking screw (5) becomes to cooperatively interact.
2. a kind of seamless steel pipe according to claim 1 is stifled with expanding, and it is characterized in that: the locking screw (5) between described movable pressure plate (7) and main application of force handle (6) is provided with a sleeve pipe (9).
3. a kind of seamless steel pipe according to claim 1 is stifled with expanding, it is characterized in that: the threaded end of described locking screw (5) is provided with a flat connecting head (5b), one end of described fixedly application of force handle (1) is provided with a flat attachment hole (1a), and flat connecting head (5b) is worked in coordination into flat attachment hole (1a) and is fixedly connected with.
4. a kind of seamless steel pipe according to claim 1 is stifled with expanding, it is characterized in that: the end at described main application of force handle (6) is provided with connecting thread (6a), or welds the nut with connecting thread (6a) at an end of described main application of force handle (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350363 CN202691437U (en) | 2012-07-19 | 2012-07-19 | Expansion plug for seamless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220350363 CN202691437U (en) | 2012-07-19 | 2012-07-19 | Expansion plug for seamless steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202691437U true CN202691437U (en) | 2013-01-23 |
Family
ID=47547059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220350363 Expired - Fee Related CN202691437U (en) | 2012-07-19 | 2012-07-19 | Expansion plug for seamless steel tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202691437U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937682A (en) * | 2016-06-21 | 2016-09-14 | 山西百达电子科技有限公司 | Expansion plug type blockage device capable of passing liquid |
| CN108332806A (en) * | 2018-02-08 | 2018-07-27 | 佛山市南海奔达模具有限公司 | Suitable for testing the flow tester of the cooler with main pipe and Duo Gen branch conduits |
| CN108999976A (en) * | 2018-09-04 | 2018-12-14 | 沈阳飞机工业（集团）有限公司 | A kind of unilateral installation sealing blocking |
-
2012
- 2012-07-19 CN CN 201220350363 patent/CN202691437U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937682A (en) * | 2016-06-21 | 2016-09-14 | 山西百达电子科技有限公司 | Expansion plug type blockage device capable of passing liquid |
| CN108332806A (en) * | 2018-02-08 | 2018-07-27 | 佛山市南海奔达模具有限公司 | Suitable for testing the flow tester of the cooler with main pipe and Duo Gen branch conduits |
| CN108999976A (en) * | 2018-09-04 | 2018-12-14 | 沈阳飞机工业（集团）有限公司 | A kind of unilateral installation sealing blocking |
| CN108999976B (en) * | 2018-09-04 | 2024-01-23 | 沈阳飞机工业（集团）有限公司 | Single-side installation sealing plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130719 |