CN202329968U - Plunger type tool for locally plugging and detecting weld joint inside pipeline - Google Patents
Plunger type tool for locally plugging and detecting weld joint inside pipeline Download PDFInfo
- Publication number
- CN202329968U CN202329968U CN2011204522661U CN201120452266U CN202329968U CN 202329968 U CN202329968 U CN 202329968U CN 2011204522661 U CN2011204522661 U CN 2011204522661U CN 201120452266 U CN201120452266 U CN 201120452266U CN 202329968 U CN202329968 U CN 202329968U
- Authority
- CN
- China
- Prior art keywords
- bracing ring
- plunger type
- type tool
- screw thread
- pipe
- 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 a plunger type tool for locally plugging and detecting a weld joint inside a pipeline. The plunger type tool comprises a front circular fastening plate positioned in front of the plunger type tool, an inner cylindrical support ring positioned at the middle of the plunger type tool and a rear circular fastening plate positioned at the back side of the plunger type tool, wherein convex rings are respectively arranged at the positions of the inner support ring, which are close to the front end and the rear end; sealing rings are respectively arranged between the front convex ring and the front fastening plate as well as between the rear convex ring and the rear fastening plate; the front fastening plate, the inner support ring and the rear fastening plate are fastened together by a fastening screw, a self-locking nut and a nut; two circular holes are formed in the middle cylindrical wall of the inner support ring; two 90-degree threaded elbows which are respectively connected with the two circular holes are arranged at the inner part of the inner support ring; and the two 90-degree threaded elbows are respectively connected to an external pressure pump and an external pressure gauge. The plunger type tool disclosed by the utility model has the advantages of simple structure, low operation cost and especial excellence in long-distance and multi-weld-joint leak hunting.
Description
Technical field
The utility model belongs to the instrument whether a kind of testing conduit weld seam leaks gas.
Background technology
Boiler, pressure vessel and conveyance conduit; Before using, all pipe welding seams must pass through the pressure leakage test, according to standard; The prefered method of the integrity test of welding is to adopt hydrostatic method, and other method has X-ray diffraction, magnetic particle detection, liquid infiltration to detect or the like.Most of containers, flange, valve and other various conduit assemblies are all by manufacturer's test, but under the practical operation condition, when new clothes and replacing pipeline, the weld seam of pipeline and flange connecting portion must leak hunting.Traditional welding leak detection method is to use the whole apparatus system that is closed of tested media (water, oil, gas etc.) filling, then proving installation is pressurized to predetermined numerical value, and keeps this pressure a period of time, confirms finally whether weld seam leaks; This method not only causes equipment to shut down for a long time, but also needs a large amount of tested media.
Summary of the invention
The purpose of the utility model is exactly to provide a kind of quick, effective, economic local shutoff of pipe interior plunger type to detect the instrument of weld seam in order to overcome the above problems.
The technical scheme of the utility model is achieved like this: the local shutoff of a kind of pipe interior plunger type detects the instrument of weld seam, is characterized in: it comprises the preceding binding 4 of annular of front, the middle interior bracing ring 3 of cylindrical shape, the circular back binding 5 of back; Respectively be provided with a bulge loop at interior bracing ring 3 near the front and back ends place, in the groove of interior bracing ring 3 front end bulge loops and 4 formation of preceding binding, O-ring seal 11 be housed, in the groove of interior bracing ring 3 rear end bulge loops and 5 formation of back binding, O-ring seal 6 is housed; With fastening screw 8 and self-locking nut 9 and nut 10 preceding binding 4, interior bracing ring 3, back binding 5 are tightened together; On the barrel of the middle part of interior bracing ring 3, have two circular holes; Be provided with the screw thread bend pipe 12 and 16 of two 90 degree in interior bracing ring 3 inside; A circular hole in one end of screw thread bend pipe 12 is packaged into through threaded line pipe 13 on the barrel of bracing ring 3; The other end of screw thread bend pipe 12 is connected to the connecting pipe 14 that is connected to the external pressure pump; Another circular hole in one end of screw thread bend pipe 16 is packaged into through threaded line pipe 17 on the barrel of bracing ring 3, the other end of screw thread bend pipe 16 is connected to the connecting pipe 15 that is connected to the external pressure table.
The utility model is simple in structure, and running cost is low, and long distance, leaking hunting of many weld seams are especially shown its superiority.Has advantage: a, significantly reduced the time of pipeline welding system being isolated preliminary work.B, have extraordinary dirigibility, can isolating weld seam, socket weld and anti-skidding flange, elbow and threeway; Boiler and Tube Sheet of Heat Exchanger, and other configuration component etc.C, light can reduce injury risk to greatest extent, and does not need expensive hoisting device.The detection medium of d, a need very small amount, safety, environmental protection, and can obtain pressure reading more accurately.E, range of size are applicable to all head conduits at present, do not have destructiveness, do not damage the inwall of pipeline and container.
Description of drawings
Fig. 1 is the schematic appearance of the utility model.
Fig. 2 is that the utility model places the user mode synoptic diagram in flange and the pipeline.
Fig. 3 is the front elevation of Fig. 2.
Fig. 4 is the A of Fig. 3---the A cut-open view.
Fig. 5 is the B of Fig. 3---the B cut-open view.
Fig. 6 is the Local C enlarged drawing of Fig. 4.
Among the figure: 1-testing conduit; 2-flange; 3-interior bracing ring; 4-preceding binding; 5-back binding; 6-O-ring seal; 7-pad; 8-fastening screw; 9-self-locking nut; 10-nut; 11-O-ring seal; 12-screw thread bend pipe; 13-threaded line pipe; 14-connecting pipe; 15-connecting pipe; 16-screw thread bend pipe; 17-threaded line pipe; 18-weld seam.
Embodiment
Visible by Fig. 1, Fig. 4, Fig. 5, Fig. 6: the utility model is made up of three parts: the circular back binding 5 of bracing ring 3, back in binding 4 before the annular of front, the middle cylindrical shape; Respectively be provided with a bulge loop at interior bracing ring 3 near the front and back ends place, in the groove of interior bracing ring 3 front end bulge loops and 4 formation of preceding binding, O-ring seal 11 be housed, in the groove of interior bracing ring 3 rear end bulge loops and 5 formation of back binding, O-ring seal 6 is housed; With fastening screw 8 and self-locking nut 9 and nut 10 preceding binding 4, interior bracing ring 3, back binding 5 are tightened together; On the barrel of the middle part of interior bracing ring 3, have two circular holes; Be provided with the screw thread bend pipe 12 and 16 of two 90 degree in interior bracing ring 3 inside; A circular hole in one end of screw thread bend pipe 12 is packaged into through threaded line pipe 13 on the barrel of bracing ring 3; The other end of screw thread bend pipe 12 is connected to the connecting pipe 14 that is connected to the external pressure pump; Another circular hole in one end of screw thread bend pipe 16 is packaged into through threaded line pipe 17 on the barrel of bracing ring 3, the other end of screw thread bend pipe 16 is connected to the connecting pipe 15 that is connected to the external pressure table.
Visible from Fig. 2, Fig. 3, before the test, at first different according to internal diameter of the pipeline; This instrument that preferred dimension is suitable; Place in the pipeline, make the weld seam of 2 of testing conduit 1 and flanges be positioned at the middle part of this instrument plunger, adopt tightening system (fastening screw and the effect of self-locking clamp nut) to make and expand to the testing conduit wall at interior bracing ring 3 forward and backward bulge loops and forward and backward binding 4, O- ring seal 11 and 6 between 5; The tight contact of two seals circle and pipeline makes the pipe interior at butt welded seam two ends realize local shutoff; After accomplishing shutoff, with the external pressure pump through screw thread bend pipe 12 inflation (perhaps filling other media) of in the shutoff chamber of forming by interior bracing ring 3, two O- ring seals 11 and 6, testing conduit 1 inwall, pressurizeing, after pressure reaches calibration value; Close gas admittance valve; In the time of setting, whether leak through the apparent shutoff cavity pressure of examining of external pressure that is bound up on the screw thread bend pipe 16, detect the purpose whether weld seam 18 leaks thereby reach.
The utility model is to existing defective in the conventional art; Adopt isolation technology; Both can carry out welding operation to the equipment that is turning round, and also can carry out the scene to the equipment that is turning round and detect, equipment only needs a spot of tested media just can obtain the accurate pressure reading; In testing process, tested media is sealed in the shutoff chamber to avoid the loss of running off fully.The instrument of leaking hunting can be positioned over flange or pipe interior; Concentrate on the commissure and relax applied voltage test, since in light weight, need not crane or special hoisting device; Safety coefficient is very high; Testing tool itself, method of testing, and the volume of tested media is environmentally safe has no threat.
Claims (1)
1. the local shutoff of a pipe interior plunger type detects the instrument of weld seam, it is characterized in that: it comprises binding (5) behind bracing ring (3), back in binding (4) before the annular of front, the middle cylindrical shape circular; Respectively be provided with a bulge loop at interior bracing ring near the front and back ends place; Second O-ring seal (11) is housed in the groove that between interior bracing ring front end bulge loop and preceding binding, forms, in the groove that between interior bracing ring rear end bulge loop and back binding, forms first O-ring seal (6) is housed; With fastening screw (8) and self-locking nut (9) and nut (10) preceding binding, interior bracing ring, back binding are tightened together; On the barrel of the middle part of interior bracing ring, have two circular holes; Be provided with the first screw thread bend pipe (12) and the second screw thread bend pipe (16) of two 90 degree in interior bracing ring inside; A circular hole in one end of the first screw thread bend pipe (12) is packaged into through first threaded line pipe (13) on the barrel of bracing ring; The other end of the first screw thread bend pipe (12) is connected to first connecting pipe (14) that is connected to the external pressure pump; Another circular hole in one end of the second screw thread bend pipe (16) is packaged into through second threaded line pipe (17) on the barrel of bracing ring, the other end of the second screw thread bend pipe (16) is connected to second connecting pipe (15) that is connected to the external pressure table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204522661U CN202329968U (en) | 2011-11-15 | 2011-11-15 | Plunger type tool for locally plugging and detecting weld joint inside pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204522661U CN202329968U (en) | 2011-11-15 | 2011-11-15 | Plunger type tool for locally plugging and detecting weld joint inside pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202329968U true CN202329968U (en) | 2012-07-11 |
Family
ID=46441946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204522661U Expired - Fee Related CN202329968U (en) | 2011-11-15 | 2011-11-15 | Plunger type tool for locally plugging and detecting weld joint inside pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202329968U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966255A (en) * | 2017-12-23 | 2018-04-27 | 江苏合丰机械制造有限公司 | A kind of pipe end shaping on-line measuring device and pipe end shaping online test method |
-
2011
- 2011-11-15 CN CN2011204522661U patent/CN202329968U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966255A (en) * | 2017-12-23 | 2018-04-27 | 江苏合丰机械制造有限公司 | A kind of pipe end shaping on-line measuring device and pipe end shaping online test method |
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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: 20120711 Termination date: 20131115 |