CN201653814U - Sealing device for water pressure test of small-diameter random-length steel pipes - Google Patents
Sealing device for water pressure test of small-diameter random-length steel pipes Download PDFInfo
- Publication number
- CN201653814U CN201653814U CN2010201309359U CN201020130935U CN201653814U CN 201653814 U CN201653814 U CN 201653814U CN 2010201309359 U CN2010201309359 U CN 2010201309359U CN 201020130935 U CN201020130935 U CN 201020130935U CN 201653814 U CN201653814 U CN 201653814U
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- screw rod
- water pressure
- pressure test
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Abstract
The utility model relates to a sealing device for water pressure tests of steel pipes, in particular to a sealing device for water pressure test of small-diameter random-length steel pipes, which comprises a head device and a tail device, wherein the head device and the tail device are arranged symmetrically. The head device and the tail device respectively comprise a screw stem, a flow guide hole is axially arranged in each screw stem, each screw stem is respectively sleeved with a rubber sealing ring, an inner conical sleeve, an expansion sleeve and an outer conical sleeve, one side of each rubber sealing ring is respectively provided with a first nut, each expansion sleeve is axially sectioned into two to four pieces, the outer surface of each expansion sleeve is provided with inverted teeth, the outer end of each outer conical sleeve is provided with a second nut, the outer end of the screw stem of the tail device is in threaded connection with a third nut, the outer end of the third nut is provided with a seal head, a sealing gasket is disposed between the outer end of the screw stem and the third nut, water outlet pipes respectively communicated with the flow guide holes are respectively connected with two sides of a radial direction of the third nut, and the outer end of one water outlet pipe is connected with a plug. The sealing device is simple, reasonable and compact in structure, easy in production and manufacturing, low in cost and flexible in use and operation, and increases precision and efficiency of water pressure test of the steel pipes.
Description
Technical field
The utility model relates to the packoff that a kind of steel pipe hydrostatic testing is used, and 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.
The utility model content
The purpose of this utility model 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 purpose of this utility model is achieved in that 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, 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 utility model 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 utility model.
Fig. 2 is the structural representation of the another kind of state of the utility model.
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 |
|---|---|---|---|
| CN2010201309359U CN201653814U (en) | 2010-03-05 | 2010-03-05 | Sealing device for water pressure test of small-diameter random-length steel pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201309359U CN201653814U (en) | 2010-03-05 | 2010-03-05 | Sealing device for water pressure test of small-diameter random-length steel pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201653814U true CN201653814U (en) | 2010-11-24 |
Family
ID=43119057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201309359U Expired - Lifetime CN201653814U (en) | 2010-03-05 | 2010-03-05 | Sealing device for water pressure test of small-diameter random-length steel pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201653814U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782487A (en) * | 2010-03-05 | 2010-07-21 | 江苏诚德钢管股份有限公司 | Sealing device for water pressure test of small-diameter random-length steel tube |
| 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 |
| CN109443661A (en) * | 2018-10-15 | 2019-03-08 | 中国石油集团渤海钻探工程有限公司 | A kind of quick clamping pressure testing device for flange form blowout prevention pipeline |
-
2010
- 2010-03-05 CN CN2010201309359U patent/CN201653814U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782487A (en) * | 2010-03-05 | 2010-07-21 | 江苏诚德钢管股份有限公司 | Sealing device for water pressure test of small-diameter random-length steel tube |
| 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 |
| CN109443661A (en) * | 2018-10-15 | 2019-03-08 | 中国石油集团渤海钻探工程有限公司 | A kind of quick clamping pressure testing device for flange form blowout prevention pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101124 Effective date of abandoning: 20110803 |