CN101782487A - Sealing device for water pressure test of small-diameter random-length steel tube - Google Patents
Sealing device for water pressure test of small-diameter random-length steel tube Download PDFInfo
- Publication number
- CN101782487A CN101782487A CN 201010124452 CN201010124452A CN101782487A CN 101782487 A CN101782487 A CN 101782487A CN 201010124452 CN201010124452 CN 201010124452 CN 201010124452 A CN201010124452 A CN 201010124452A CN 101782487 A CN101782487 A CN 101782487A
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- Prior art keywords
- nut
- outer end
- screw rod
- steel tube
- pressure test
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- 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.)
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 36
- 239000010959 steel Substances 0.000 title claims abstract description 36
- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000009434 installation Methods 0.000 claims description 15
- 230000000630 rising effect Effects 0.000 claims description 13
- 238000012856 packing Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 238000002224 dissection Methods 0.000 description 6
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
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Abstract
The invention discloses a sealing device for a water pressure test of a small-diameter random-length steel tube, which relates to a sealing device for a water pressure test of a steel tube. The sealing device comprises a head device and a tail device which are symmetrically arranged and respectively comprise a screw; each screw is internally and axially provided with a diversion hole; a rubber sealing ring, an inner conical sleeve, an expansion sleeve and an outer conical sleeve are respectively sleeved on each screw; a first nut is respectively arranged on one side of each rubber sealing ring; each expansion sleeve is subdivided into two to four blocks along the axial direction and a pawl is arranged on the outer surface of each expansion sleeve; a second nut is arranged at the outer end of each outer conical sleeve; the outer end of the screw of the tail device is in threaded connection with a third nut the outer end of which is provided with an end enclosure; a sealing pad is arranged between the outer end of the screw and the third nut; and two radial sides of the third nut are respectively connected with a water outlet pipe communicated with the diversion hole, wherein the outer end of one water outlet pipe is connected with a plug. The invention has the advantages of simple, reasonable and compact structure, easy production and manufacture and low cost. In addition, the invention has flexible use and operation and improves the precision and the efficiency for the water pressure test of the steel tube.
Description
Technical field
The present invention relates to the packoff that a kind of steel pipe hydrostatic testing is used, especially for small-bore in the boiler industry, the hydraulic testing of overlength (random length) pipe belongs to hydraulic testing equipment technical field.
Background technology
Existing steel pipe hydrostatic testing device structure complexity, bulky, the cost height uses inconvenient operation.For minor diameter, overlength (random length) steel pipe, this water pressure engine is powerless.
Summary of the invention
Purpose of the present invention mainly provides sealing device for water pressure test of small-diameter random-length steel tube a kind of simple in structure, easy to use.
The object of the present invention is achieved like this: a kind of sealing device for water pressure test of small-diameter random-length steel tube, comprise symmetrically arranged head device and rear-mounted installation, and described head device and rear-mounted installation comprise screw rod respectively, and pod apertures axially is set in each screw rod; Be nested with rubber seal, inner conical drogue, expansion set and external conical sleeve on each screw rod respectively, each inner conical drogue is separately positioned on a side of corresponding rubber seal, the opposite side of each rubber seal is provided with first nut respectively, and first nut thread is connected the inner of screw rod; Each inner conical drogue is plugged on the inner of corresponding expansion set respectively, and each external conical sleeve is plugged on the outer end of corresponding expansion set respectively; Each expansion set subdivision vertically is that two to four and outside surface are provided with pawl, and the outer end of each external conical sleeve is provided with second nut, and second nut thread is connected on the screw rod; The outer end that is threaded, the outer end of the screw rod of described rear-mounted installation is provided with the 3rd nut of end socket, between the screw rod outer end of described rear-mounted installation and the 3rd nut sealing gasket is set, both sides radially of described the 3rd nut connect the rising pipe that is communicated with pod apertures respectively, and the outer end of one of them rising pipe connects plug in described two rising pipes.
During steel tube pressure-measuring, the scene has motor test pump (outsourcing), is connected with head device with pipe adapter by high-pressure hose, and rear-mounted installation is fixed on the afterbody of steel pipe.Choose expansion set (dissection type, band pawl) according to the internal diameter of tested steel pipe, rubber seal, and will partly assemble end to end, head part is filled in the head of steel pipe, is connected with motor test pump with pipe adapter by high-pressure hose.Afterbody is filled in the afterbody of steel pipe, connect second nut on the device for screwing up of back, second nut location when tightening since the location of external conical sleeve do not produce and move axially, making screw rod outwards produce moves axially, extruding rubber seal and external conical sleeve, at first make because moving axially of tapered sleeve makes expansion set (dissection type, the band pawl) produces radial dilatation, pawl above the expansion set just produces pressure with the steel pipe inwall, make device be fixed in the steel pipe, simultaneously rubber seal is owing to axial compression produces radial dilatation, and tightly is posted on the steel pipe inwall, seals.Elder generation is by motor test pump water filling in steel pipe during pressure testing, after a period of time, when seeing rising pipe and begin water outlet, lock the 3rd nut after, the motor test pump pressurization, pass through the motor test pump release behind the pressurize certain hour, after pressure lowers, second nut on the releasing device, extracting apparatus, finish work pressure test, prepare to carry out the work pressure test of next root steel pipe.
Form stationary installation by first nut, inner conical drogue, external conical sleeve, second packing ring, second nut.Form packoff by first packing ring, rubber seal, screw rod (drilled in middle pod apertures), expansion set (dissection type, band pawl), second packing ring.Form exhaust apparatus by the 3rd nut, rising pipe, sealing gasket, plug.
The simple and reasonable compactness of the present invention is manufactured easily, and cost is low.This device is owing to be provided with stationary installation and packoff and guiding device and exhaust apparatus, use flexible operation, the precision and the efficient of steel pipe hydrostatic testing have been improved, the hydraulic testing of small-bore pipe in can being widely used in, be particularly useful for boiler with small-bore overlength pipe (random length), have excellent popularization to be worth.
Too tight for what prevent to lean between inner conical drogue and the external conical sleeve, influence the radial dilatation of expansion set, radially boss is set respectively on the screw rod between each inner conical drogue and the external conical sleeve.
For enhanced leaktightness, between each first nut and rubber seal, first packing ring is set respectively.
Between each external conical sleeve and second nut, second packing ring is set respectively.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the structural representation of the another kind of state of the present invention.
Fig. 3 is the structural representation of expansion set.
Fig. 4 be among Fig. 3 A to view.
Among the figure, 1 first nut, 2 first packing rings, 3 rubber seal, 4 inner conical drogues, 5 screw rods, 5-1 is boss radially, 6 expansion sets, 6-1 pawl, 7 external conical sleeves, 8 second packing rings, 9 second nuts, 10 the 3rd nuts, 11 rising pipes, 12 sealing gaskets, 13 plugs, 14 steel pipes, 15 pod apertures.
Embodiment
As shown in Figure 1, be sealing device for water pressure test of small-diameter random-length steel tube, comprise symmetrically arranged head device and rear-mounted installation, head device and rear-mounted installation comprise screw rod 5 respectively, in each screw rod 5 pod apertures 15 are set axially.Be nested with rubber seal 3, inner conical drogue 4, expansion set 6 and external conical sleeve 7 on each screw rod 5 respectively, each inner conical drogue 4 is separately positioned on a side of corresponding rubber seal 3, the opposite side of each rubber seal 3 is provided with first nut 1 respectively, first nut 1 is threaded in the inner of screw rod 5, between each first nut 1 and rubber seal 3 first packing ring 2 is set respectively.
Each inner conical drogue 4 is plugged on the inner of corresponding expansion set 6 respectively, and each external conical sleeve 7 is plugged on the outer end of corresponding expansion set 6 respectively.Radially boss 5-1 is set respectively on the screw rod 5 between each inner conical drogue 4 and the external conical sleeve 7.The outer end of each external conical sleeve 7 is provided with second nut, 9, the second nuts 9 and is threaded on the screw rod 5.Between each external conical sleeve 7 and second nut 9, second packing ring 8 is set respectively.
The outer end that is threaded, the outer end of the screw rod 5 of rear-mounted installation is provided with the 3rd nut 10 of end socket, between screw rod 5 outer ends of rear-mounted installation and the 3rd nut 10 sealing gasket 12 is set, the outer end that both sides radially of the 3rd nut 10 connect one of them rising pipe in 11, two rising pipes 11 of rising pipe that are communicated with pod apertures 15 respectively connects plug 13.
Shown in Fig. 3,4, each expansion set 6 is a dissection type, and subdivision is three vertically, and outside surface is provided with pawl 6-1.
When adopting this device to carry out the hydraulic testing, choose expansion set 6 (dissection type, band pawl) and rubber seal 3 according to the internal diameter of tested steel pipe 14, and will partly assemble end to end, head part is filled in the head of steel pipe 14, is connected with motor test pump with pipe adapter by high-pressure hose.Afterbody is filled in the afterbody of steel pipe 14, connect second nut 9 on the device for screwing up of back, second nut, 9 positions when tightening since the location of external conical sleeve 7 do not produce and move axially, making screw rod 5 outwards produce moves axially, extruding rubber seal 3 and external conical sleeve 7, at first make because moving axially of tapered sleeve makes expansion set 5 (dissection types, the band pawl) produces radial dilatation, pawl above the expansion set 6 just produces pressure with steel pipe 14 inwalls, make device be fixed in the steel pipe 14, simultaneously rubber seal 3 is owing to axial compression produces radial dilatation, and tightly is posted on steel pipe 14 inwalls, seals.Elder generation is by motor test pump water filling in steel pipe 14, after a period of time, when seeing rising pipe 11 beginning water outlets during pressure testing, the interior air of steel pipe this moment has been arranged, after locking the 3rd nut 10, as shown in Figure 2, the motor test pump pressurization, pass through the motor test pump release behind the pressurize certain hour, after pressure lowers, second nut 9 on the releasing device, extracting apparatus, finish work pressure test, prepare to carry out the work pressure test of next root steel pipe.
Claims (4)
1. a sealing device for water pressure test of small-diameter random-length steel tube is characterized in that comprising symmetrically arranged head device and rear-mounted installation, and described head device and rear-mounted installation comprise screw rod respectively, and pod apertures axially is set in each screw rod; Be nested with rubber seal, inner conical drogue, expansion set and external conical sleeve on each screw rod respectively, each inner conical drogue is separately positioned on a side of corresponding rubber seal, the opposite side of each rubber seal is provided with first nut respectively, and first nut thread is connected the inner of screw rod; Each inner conical drogue is plugged on the inner of corresponding expansion set respectively, and each external conical sleeve is plugged on the outer end of corresponding expansion set respectively; Each expansion set subdivision vertically is that two to four and outside surface are provided with pawl, and the outer end of each external conical sleeve is provided with second nut, and second nut thread is connected on the screw rod; The outer end that is threaded, the outer end of the screw rod of described rear-mounted installation is provided with the 3rd nut of end socket, between the screw rod outer end of described rear-mounted installation and the 3rd nut sealing gasket is set, both sides radially of described the 3rd nut connect the rising pipe that is communicated with pod apertures respectively, and the outer end of one of them rising pipe connects plug in described two rising pipes.
2. sealing device for water pressure test of small-diameter random-length steel tube according to claim 1 is characterized in that: radially boss is set respectively on the screw rod between each inner conical drogue and the external conical sleeve.
3. sealing device for water pressure test of small-diameter random-length steel tube according to claim 1 is characterized in that: between each first nut and rubber seal first packing ring is set respectively.
4. sealing device for water pressure test of small-diameter random-length steel tube according to claim 1 is characterized in that: between each external conical sleeve and second nut second packing ring is set respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101244522A CN101782487B (en) | 2010-03-05 | 2010-03-05 | Sealing device for water pressure test of small-diameter random-length steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101244522A CN101782487B (en) | 2010-03-05 | 2010-03-05 | Sealing device for water pressure test of small-diameter random-length steel tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101782487A true CN101782487A (en) | 2010-07-21 |
| CN101782487B CN101782487B (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101244522A Expired - Fee Related CN101782487B (en) | 2010-03-05 | 2010-03-05 | Sealing device for water pressure test of small-diameter random-length steel tube |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141457A (en) * | 2010-12-30 | 2011-08-03 | 陕西化建工程有限责任公司 | U-shaped heat exchange tube pressure test positioner |
| CN102313631A (en) * | 2011-05-31 | 2012-01-11 | 山东力诺瑞特新能源有限公司 | Water-testing seal plug and water testing method thereof |
| CN102393280A (en) * | 2011-09-26 | 2012-03-28 | 张家港化工机械股份有限公司 | Deep hole welding pressure test tool |
| CN102788668A (en) * | 2012-07-30 | 2012-11-21 | 山海关船舶重工有限责任公司 | Single-tube pressure test device for heat exchanger of ship |
| CN103528762A (en) * | 2013-10-30 | 2014-01-22 | 欧萨斯能源环境设备(南京)有限公司 | Leakage detection device for overheater header pipe |
| CN104034484A (en) * | 2014-06-18 | 2014-09-10 | 贵州红阳机械(集团)公司 | Corrugated hose detection device |
| CN104594867A (en) * | 2015-01-06 | 2015-05-06 | 中国科学院武汉岩土力学研究所 | Hydraulic fracturing pipe with sealing device |
| CN105090646A (en) * | 2014-05-09 | 2015-11-25 | 陕西重型汽车有限公司 | Hose connector sealing assembly |
| CN106855483A (en) * | 2016-12-23 | 2017-06-16 | 中国矿业大学 | Hydrogen Vapor Pressure fatigue rupture and hydrogen-induced delayed failure sensitivity test equipment and method |
| CN107179162A (en) * | 2017-07-09 | 2017-09-19 | 昆山展宇波纹管有限公司 | A kind of special side leakage instrument of flexible pipe |
| CN108426775A (en) * | 2017-02-15 | 2018-08-21 | 东管重工(沈阳)有限公司 | The externally screwed water pressure test tool of small dimension thin-wall steel tube |
| CN109483447A (en) * | 2018-12-13 | 2019-03-19 | 贵州永红航空机械有限责任公司 | The explosion-proof airtight fixture of condenser |
| CN110057680A (en) * | 2018-01-19 | 2019-07-26 | 兰州兰石重型装备股份有限公司 | Heat exchanger tube structure for pressure test and its application method |
| CN112763309A (en) * | 2021-01-18 | 2021-05-07 | 江南工业集团有限公司 | Thin-wall circular pipe hydraulic test device and test method |
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2010
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141457A (en) * | 2010-12-30 | 2011-08-03 | 陕西化建工程有限责任公司 | U-shaped heat exchange tube pressure test positioner |
| CN102313631A (en) * | 2011-05-31 | 2012-01-11 | 山东力诺瑞特新能源有限公司 | Water-testing seal plug and water testing method thereof |
| CN102313631B (en) * | 2011-05-31 | 2013-05-08 | 山东力诺瑞特新能源有限公司 | Water-testing seal plug and water testing method thereof |
| CN102393280A (en) * | 2011-09-26 | 2012-03-28 | 张家港化工机械股份有限公司 | Deep hole welding pressure test tool |
| CN102788668A (en) * | 2012-07-30 | 2012-11-21 | 山海关船舶重工有限责任公司 | Single-tube pressure test device for heat exchanger of ship |
| CN102788668B (en) * | 2012-07-30 | 2014-12-10 | 山海关船舶重工有限责任公司 | Single-tube pressure test device for heat exchanger of ship |
| CN103528762A (en) * | 2013-10-30 | 2014-01-22 | 欧萨斯能源环境设备(南京)有限公司 | Leakage detection device for overheater header pipe |
| CN105090646A (en) * | 2014-05-09 | 2015-11-25 | 陕西重型汽车有限公司 | Hose connector sealing assembly |
| CN104034484A (en) * | 2014-06-18 | 2014-09-10 | 贵州红阳机械(集团)公司 | Corrugated hose detection device |
| CN104594867A (en) * | 2015-01-06 | 2015-05-06 | 中国科学院武汉岩土力学研究所 | Hydraulic fracturing pipe with sealing device |
| CN106855483A (en) * | 2016-12-23 | 2017-06-16 | 中国矿业大学 | Hydrogen Vapor Pressure fatigue rupture and hydrogen-induced delayed failure sensitivity test equipment and method |
| CN106855483B (en) * | 2016-12-23 | 2020-02-14 | 中国矿业大学 | Hydrogen pressure fatigue fracture and hydrogen induced hysteresis fracture sensitivity test device and method |
| CN108426775A (en) * | 2017-02-15 | 2018-08-21 | 东管重工(沈阳)有限公司 | The externally screwed water pressure test tool of small dimension thin-wall steel tube |
| CN108426775B (en) * | 2017-02-15 | 2023-10-13 | 东管重工(沈阳)有限公司 | External tightening type hydraulic test tool for small-specification thin-wall steel pipe |
| CN107179162A (en) * | 2017-07-09 | 2017-09-19 | 昆山展宇波纹管有限公司 | A kind of special side leakage instrument of flexible pipe |
| CN110057680A (en) * | 2018-01-19 | 2019-07-26 | 兰州兰石重型装备股份有限公司 | Heat exchanger tube structure for pressure test and its application method |
| CN109483447A (en) * | 2018-12-13 | 2019-03-19 | 贵州永红航空机械有限责任公司 | The explosion-proof airtight fixture of condenser |
| CN112763309A (en) * | 2021-01-18 | 2021-05-07 | 江南工业集团有限公司 | Thin-wall circular pipe hydraulic test device and test method |
| CN112763309B (en) * | 2021-01-18 | 2022-09-20 | 江南工业集团有限公司 | Thin-wall circular pipe hydraulic test device and test method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101782487B (en) | 2011-08-03 |
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Granted publication date: 20110803 |