CN105784284B - A kind of detection means for inner hole welding of rapid cooling joint - Google Patents
A kind of detection means for inner hole welding of rapid cooling joint Download PDFInfo
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- CN105784284B CN105784284B CN201610333497.8A CN201610333497A CN105784284B CN 105784284 B CN105784284 B CN 105784284B CN 201610333497 A CN201610333497 A CN 201610333497A CN 105784284 B CN105784284 B CN 105784284B
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- extruding
- welding
- sealing ring
- moving casing
- type sealing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
A kind of detection means for inner hole welding of rapid cooling joint, it is characterised in that it includes moving casing, " O " type sealing ring, extruding screw, extruding sliding block and extruding nut；The moving casing is by the boss and " O " type sealing ring of extruding screw one end, and " O " type sealing ring, extruding sliding block and the extruding nut sleeve of the other end are on extruding screw；The moving casing is being provided with venthole close to welding point opening position, and one end of the extruding screw is provided with the crawl space formed between air admission hole connection moving casing and extruding screw.Quality testing of the detection means of the present invention available for various heat exchanger internal bore welding welding points, the present apparatus are simple in construction, parts are few, the advantages that fabrication and installation are convenient, and safe operation is reliable and stable, the quality testing to various heat exchanger internal bore welding welding points are applicable completely.
Description
Technical field
The invention belongs to mechanical erection equipment technical field, and in particular to the tube-to-tube sheet connection weldering of internal bore welding in heat exchanger
Connect the special purpose device of joint quality detection.
Background technology
In the design of heat exchanger, according to the particular case of medium and avoid producing corrosion, pipe between tube-to-tube sheet connection
With the type of attachment of tube sheet using form is docked, welding method uses internal bore welding, for internal bore welding quality of weld joint how
Go to ensure and detect.Current generally use helium detects as detection gas to weld seam regarding to the issue above, due to helium
Sensitivity it is high, such as incorrect use, helium easily produces gas interference to surrounding environment, and influences follow-up work.Thus, carry
Go out and the position that internal bore welding welding point detects is limited in limited space, be passed through in narrow confined space minimal amount of
Helium, that is, want Welded Joints to be detected, helium can not be diffused to surrounding environment again.
The content of the invention
The purpose of the present invention be to overcome above mentioned problem, and propose it is a kind of it is economic and practical, safely and be applied to heat exchange
The detection means of device internal bore welding quality of weld joint.
Detection of the apparatus of the present invention especially suitable for heat exchanger internal bore welding quality of weld joint, can be fully achieved and meet
Internal bore welding quality of weld joint testing requirements in heat exchanger.
The main technical schemes of the present invention：Detection means for inner hole welding of rapid cooling joint, it is characterised in that it includes activity
Sleeve pipe, " O " type sealing ring, extruding screw, extruding sliding block and extruding nut；The moving casing is convex by extruding screw one end
Platform and " O " type sealing ring seal, and " O " type sealing ring, extruding sliding block and the extruding nut sleeve of the other end are on extruding screw；It is described
Moving casing is being provided with venthole close to welding point opening position, and one end of the extruding screw is provided with air admission hole connection movable sleeve
The crawl space formed between pipe and extruding screw.
The present invention is such to running：First device all parts assemble it is integral, it is preliminary to extruding nut
Pretension, " O " type sealing ring is in non-radial expansion state, put down gently in tube sheet pore, outlet hole site is placed on pipe in device
Son by extruding nut with the welding point of tube sheet, carrying out pretension, extruding screw and extruding nut are produced and moved towards, movable sleeve
Pipe is pressurized under the responsive to axial force of extruding screw and extruding nut relative to inactive state, " O " type sealing ring, produces and radially expand
, " O " the type sealing ring at both ends produces with hole wall to be brought into close contact, and is formed a very narrow confined space, is at this moment passed through extruding
Inert gas helium with certain pressure is passed through in narrow confined space by the enterprising stomata of screw rod, in the weldering of tube-to-tube sheet connection
Connect and helium inspection is carried out outside joint, such as without helium leakage, then tube-tube plate welding is qualified.Often welding completes a welding point and is
It can be detected.
Detection means of the present invention can be used for the quality testing of various heat exchanger internal bore welding welding points, the present apparatus, structure
Simply, various heat exchanger internal bore weldings are connect by the advantages that parts are few, and fabrication and installation are convenient, and safe operation is reliable and stable
The quality testing of head is applicable completely.
Brief description of the drawings
Fig. 1 embodiment of the present invention is used for the detection means schematic diagram of heat exchanger inner hole welding of rapid cooling joint.
Fig. 2 is the structural representation of extruding screw in embodiment.
Fig. 3 is the structural representation of moving casing in embodiment.
Fig. 4 is the structural representation that sliding block is extruded in embodiment.
In figure, 1- extruding screws；2- " O " type sealing ring；3- moving casings；4-extruding sliding block；5-extruding nut.
Embodiment
The structure of the present invention is described in detail below in conjunction with drawings and examples.
Embodiment：The present embodiment is used for the detection means of heat exchanger inner hole welding of rapid cooling joint, as shown in Figure 1, main bag
Include moving casing 3, " O " type sealing ring 2, extruding screw 1, extruding sliding block 4 and extruding nut 5；The moving casing 3（Referring to attached
Fig. 3）Pass through extruding screw 1（Referring to accompanying drawing 2）The boss of one end and " O " type sealing ring seal, " O " the type sealing ring of the other end,
Extrude sliding block（Referring to accompanying drawing 4）It is enclosed on extruding nut 5 on extruding screw 1；The moving casing 3 is close to welding point（Weldering
Seam）Opening position is provided with venthole, and one end of the extruding screw 1 is provided between air admission hole connection moving casing 3 and extruding screw 1
The crawl space of formation.
The installation of the present embodiment device is that the moving casing in device, " O " type sealing ring, are first extruded sliding block at extruding screw,
Extruding nut etc. is assembled.The preliminary pretension of nut is extruded, " O " type sealing ring is in non-radial expansion state, assembles
Device external diameter be slightly less than heat exchange pore internal diameter, put down gently in tube sheet pore, the positioning of device should be so outlet hole site
It is placed on the joint of tube-to-tube sheet connection（Weld seam）Place, extruding nut is subjected to pretension, at this moment " O " type sealing ring in extruding screw and squeezes
Press and be pressurized under the responsive to axial force of nut, produce radially uniform expansion, " O " type sealing ring and the hole wall at both ends produce close patch
Close, form a very narrow pressure-bearing confined space, at this moment by the air admission hole of extruding screw by the inert with certain pressure
Gas helium is passed through in narrow confined space, detection gas is uniformly spread in narrow confined space, in tube-to-tube sheet connection
Welding point at outside carry out helium inspection, it is qualified such as without helium leakage tube-tube plate welding through 5 ~ 6 seconds.A weldering is completed in often welding
Joint can be detected.The present apparatus can be connected, while detect the welding point of multiple internal bore weldings.
Special purpose device of the present invention can be used for the quality testing of various heat exchanger internal bore welding welding points, this new exclusive dress
Put, the advantages that simple in construction, parts are few, and fabrication and installation are convenient, and safe operation is reliable and stable, to various heat exchanger internal bore weldings
The quality testing of welding point is applicable completely.
Claims (1)
1. a kind of detection means for inner hole welding of rapid cooling joint, it is characterised in that it includes moving casing, " O " type sealing ring, squeezed
Press screw rod, extruding sliding block and extruding nut；The moving casing is close by the boss and " O " type sealing ring of extruding screw one end
Envelope, " O " type sealing ring, extruding sliding block and the extruding nut sleeve of the other end are on extruding screw；The moving casing is close to weldering
Connect and venthole is provided with joint location, one end of the extruding screw is provided between air admission hole connection moving casing and extruding screw
The crawl space of formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610333497.8A CN105784284B (en) | 2016-05-19 | 2016-05-19 | A kind of detection means for inner hole welding of rapid cooling joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610333497.8A CN105784284B (en) | 2016-05-19 | 2016-05-19 | A kind of detection means for inner hole welding of rapid cooling joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105784284A CN105784284A (en) | 2016-07-20 |
| CN105784284B true CN105784284B (en) | 2017-12-12 |
Family
ID=56380081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610333497.8A Active CN105784284B (en) | 2016-05-19 | 2016-05-19 | A kind of detection means for inner hole welding of rapid cooling joint |
Country Status (1)
| Country | Link |
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| CN (1) | CN105784284B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860521A (en) * | 2017-12-05 | 2018-03-30 | 广西玉柴机器股份有限公司 | The plugging device of engine cylinder cap oil duct leak test |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5896233A (en) * | 1981-12-04 | 1983-06-08 | Mitsubishi Heavy Ind Ltd | Evacuator for heat exchanger tubule or the like |
| GB8524933D0 (en) * | 1985-10-09 | 1985-11-13 | Bl Tech Ltd | Leak detector |
| JPH05149821A (en) * | 1991-11-28 | 1993-06-15 | Fuji Electric Co Ltd | Absolute pressure sensor and inspecting method of airtightness thereof |
| CN201166599Y (en) * | 2008-02-26 | 2008-12-17 | 上海电气电站设备有限公司 | Apparatus for detecting helium leakage of heat exchanger tube sheet weld joint |
| CN101408466B (en) * | 2008-11-08 | 2010-06-02 | 宁夏电力科技教育工程院 | Method and device for detecting leakage of shell type heat exchanger |
| CN202974593U (en) * | 2012-10-29 | 2013-06-05 | 哈电集团（秦皇岛）重型装备有限公司 | Novel detection device for detecting helium leakage of weld joint between pipe and pipe sheet of heat exchange container with open structure |
| BR102012031196A2 (en) * | 2012-12-07 | 2013-10-29 | Expander Manutencao Ltda | Helium gas tightness testing device applied to heat exchanger tubes or correlates |
| CN205691298U (en) * | 2016-05-19 | 2016-11-16 | 中国石化集团南京化学工业有限公司化工机械厂 | A kind of detection device for inner hole welding of rapid cooling joint |
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2016
- 2016-05-19 CN CN201610333497.8A patent/CN105784284B/en active Active
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| CN105784284A (en) | 2016-07-20 |
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