CN202433243U - External pressure seal test device for tubing - Google Patents
External pressure seal test device for tubing Download PDFInfo
- Publication number
- CN202433243U CN202433243U CN201120514675XU CN201120514675U CN202433243U CN 202433243 U CN202433243 U CN 202433243U CN 201120514675X U CN201120514675X U CN 201120514675XU CN 201120514675 U CN201120514675 U CN 201120514675U CN 202433243 U CN202433243 U CN 202433243U
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- fastening
- external pressure
- seal
- glands
- gland
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Abstract
The utility model provides an external pressure seal test device for tubing. The test device comprises two fastening glands, sunk screws, junk rings and seal rubber rings, wherein the two fastening glands have the same inner and outer diameters, grooves are arranged at the inner diameter positions of corresponding end faces of the two fastening glands, the junk rings are arranged in the grooves respectively, the seal rubber rings are arranged between the corresponding end faces of the two fastening glands, each sunk screw penetrates through a first fastening gland, one seal rubber ring and a second fastening gland sequentially and connects the two fastening glands with the seal rubber ring between the two fastening glands. The external pressure seal test device for the tubing has the advantages that a mechanical auxiliary structure and the common rubber rings coordinate and act on each other, the cost is low, effects of high pressure water sealing can be guaranteed by aid of the rubber rings with a medium performance, composite force pressure seal circulation tests can be finished with the least time through cooperation of the test device with a external pressure vessel, a flange, high water pressure and a sample tube, the seal effects are good, and the external pressure test effect is achieved.
Description
Technical field
The utility model relates to a kind of sealing experiment device, the particularly a kind of oil pipe external pressure sealing experiment device of 2.375in under the 3.5in specification limit combined load that be applicable to.
Background technology
As shown in Figure 1; Former external pressure test packoff is: adopt gib screw 10 to pass flange 6 and be connected with external pressure vessel 7; And before dress appearance, O-ring seal 4 is enclosed within on the appearance pipe 9, when when external pressure vessel 7 is squeezed into hydraulic pressure, pressure applies acting force to the flange direction; But withstood by flange, thereby reach sealing function.
But this seal form only is fit to the water external pressure test of the above specification of 5.5in.At present in the actual tests 2.375in when effective this seal form of 3.5in specification appearance is done external pressure test, when boosting again after the pressure release, seal failure, water flows out from flange, external pressure test at this moment can't be accomplished.
Analyze the packoff of this kind structure, think to have following shortcoming, thereby cause seal failure.
(1) O-ring seal is enclosed within appearance pipe is gone up and when installing to flange on the external pressure vessel, because adopt no gap to assemble, installation is wasted time and energy, and also O-ring seal is had damage;
(2) O-ring seal does not have fixingly or spacing, so that through after once suppressing the pressure release circulation, the shape of rubber seal deforms, and causing between O-ring seal and external pressure vessel and the appearance pipe has the space to cause leakage.
This external pressure test packoff exists following defective by seal with elastometic washer merely: the one, and high to the toughness reguirements of rubber ring elasticity, domestic material is difficult to accomplish; The 2nd, have only rubber ring and do not have related device or structure and cooperate with it and reach the external pressure sealing purpose, still there is certain difficulty, and also wastes time and energy very much when sealing rubber ring and flange are installed, efficient is quite low.
Summary of the invention
To structural deficiency in the prior art, the purpose of the utility model provides a kind of oil pipe external pressure sealing experiment, to reach time saving and energy saving and external pressure good seal is installed, and can accomplish 2.375 smoothly to the external pressure test of 3.5in specification.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts provides a kind of oil pipe external pressure sealing experiment device, and wherein: this experimental provision includes the first fastening gland, sunk screw, pressure ring, sealing rubber ring, the second fastening gland; The said first fastening gland is the parts in identical inside and outside footpath with the second fastening gland; Inner radius at the first fastening gland and the corresponding end face of the second fastening gland is respectively equipped with groove; Said pressure ring is loaded in the groove respectively; Between the first fastening gland and the corresponding end face of the second fastening gland, be provided with sealing rubber ring, said sunk screw passes the first fastening gland, sealing rubber ring and the second fastening gland successively, and the first fastening gland is connected with the second fastening pressure ring with O-ring seal.
The effect of the utility model is to adopt mechanical assistance structure and the mutual coordinative role of General Purpose Rubber circle, and cost is not high, and the rubber ring performance requirement has generally promptly reached the water under high pressure sealing effectiveness.This experimental provision and external pressure vessel, flange, high hydraulic pressure, the mutual cooperation of appearance pipe with the minimum time, can be accomplished the outer means of press seals cyclic test of composite force, and good sealing effect has reached the external pressure test effect.
Description of drawings
Fig. 1 is the external pressure packoff synoptic diagram of prior art;
Fig. 2 is the external pressure sealing experiment device synoptic diagram of the utility model;
Fig. 3 is the outer compression experiment device general assembly synoptic diagram of the utility model.
Among the figure:
1, the first fastening gland 2, sunk screw 3, pressure ring 4, sealing rubber ring
5, the second fastening gland 5, flange 7, external pressure vessel 8, external pressure WATER AS FLOW MEDIUM
9, appearance pipe 10, gib screw 11, external pressure sealing experiment device
Embodiment
In conjunction with accompanying drawing and embodiment the structure of the oil pipe external pressure sealing experiment device of the utility model is explained.
The oil pipe external pressure sealing experiment apparatus structure of the utility model, this experimental provision include the first fastening gland 1, sunk screw 2, pressure ring 3, sealing rubber ring 4, the second fastening gland 5; The said first fastening gland 1 is the parts in identical inside and outside footpath with the second fastening gland 5; Inner radius at the first fastening gland 1 and the second fastening gland 5 corresponding end faces is respectively equipped with groove; Said pressure ring 3 is loaded in the groove respectively; Between the first fastening gland 1 and the second fastening gland 5 corresponding end faces, be provided with sealing rubber ring 4, the said first fastening gland 1 is provided with through hole, and the second fastening gland 5 is provided with tapped blind hole.
Said sunk screw 2 passes the first fastening gland 1, sealing rubber ring 4 and the second fastening gland 5 successively, and the first fastening gland 1 is connected with the second fastening pressure ring 5 with O-ring seal 4.
The oil pipe external pressure sealing experiment apparatus structure of the utility model is following with the process that realizes sealing effectiveness, is example with the oil pipe under the 3.5in specification limit combined load:
Shown in Fig. 2 and 3, oil pipe external pressure sealing experiment device comprises that the fastening gland of the first fastening gland 1, second 5, sunk screw 2, pressure ring 3, common parts such as sealing rubber ring 4 form.The utility model external pressure packoff 11 must cooperatively interact and just can reach sealing effectiveness with external pressure WATER AS FLOW MEDIUM 8, flange 6, appearance pipe 9, external pressure vessel 7, gib screw 10.
The seal process of oil pipe external pressure sealing experiment device is to realize like this; At first this external pressure sealing experiment device 11 is installed; Be about to place on the first fastening gland 1 pressure ring 3, the second fastening glands 5 and also place pressure ring 3, sealing rubber ring 4 is clipped between the two fastening glands that assemble; Pass hole as shown in Figure 2 with sunk screw 2, above-mentioned several parts are connected.Then external pressure vessel 7 is set near the box cupling in the middle of the appearance pipe 9,, and it is enclosed within the two of appearance pipe 9 only gently with the integral body that goes up external pressure sealing experiment device 11; And make between oil pipe external pressure sealing experiment device outer face and external pressure vessel 7 both ends of the surface certain distance is arranged, at this moment that sunk screw 2 is fastening, sealing rubber ring 4 and the inwall of external pressure vessel 7 and the outer wall of appearance pipe 9 are fitted tightly; Be as the criterion not become flexible; Then flange 6 is contained on the external pressure vessel 7, and first-class trip bolt 10, this moment flange 6 end face and external pressure vessel 7 end faces between apart from about 5mm; So that in that follow-up external pressure test is initial when suppressing under the complete situation of unsealing; Can flange be compressed to sealing gland 1 through tightening trip bolt 10, under hydraulic action, make rubber seal 4 further to external pressure vessel with the appearance tube side to swelling; With the sealing load between increase packoff and external pressure vessel and the appearance pipe, thereby reach better sealing effectiveness.
When utilizing the novel oil pipe external pressure sealing experiment device of this use to do external pressure test, mounted oil pipe external pressure sealing experiment device 11, as shown in Figure 3.Be installed to that the sunk screw 2 of oil pipe external pressure sealing experiment device does not tighten before the appearance pipe 9, so that packoff is enclosed within 9 last times of appearance pipe is gapped, the convenient installation.After oil pipe external pressure sealing experiment device is set to appearance pipe 9; Reserve certain distance between oil pipe external pressure sealing experiment device its right end face and the external pressure vessel end face; Then sunk screw 2 is tightened, this moment, sealing rubber ring 4 outwards squeezed owing to the extruding between two fastening glands; And it is fully contact, and fastening with external pressure vessel 7 and appearance pipe 9.Then flange 6 is set on the appearance pipe 9, and evenly tightens set bolt 10.
When carrying out the hydraulic testing, the fastening gland of 8 pairs of oil pipe external pressures of pressure medium water sealing experiment device 5 produces pressure, and promotes the second fastening gland 5 and move right; But receive stopping of flange 6; Sealing rubber ring 4 continues to expand to external pressure vessel 7 inwalls and appearance pipe 9, and sealing force is strengthened, and hydraulic pressure is big more; Sealing force is big more, forms benign cycle.When pressure release arrives zero; Owing to there is the pressure between fastening gland and initial sealing rubber ring 4 and the external pressure vessel to exist; This oil pipe external pressure sealing experiment device can not misplace as original O-ring seal, so suppresses after the pressure release again, still can reach sealing effectiveness same when suppressing for the first time.This has been done external pressure test, 3.5 " oil pipe install the external pressure test device after, suppress to 3.5 " maximum external pressure---13000psi that oil pipe can bear, pressure release is suppressed 13000psi again to 0psi, circulates leakage situation all not occur three times.
When applying external pressure, because between O-ring seal 4 and the external pressure vessel 7 pretightning force has been arranged, can not reveal during initial pressurization; And follow-up pressurization again, pressure medium water 8 can promote fastening gland 5 and apply power outwardly, and receives stopping of flange 6; Make sealing rubber ring 4 have to outwards with inwardly expand, the normal pressure between sealing rubber ring 4 and external pressure vessel 7 and the appearance pipe 9 is bigger at this moment, and friction force is also bigger; External pressure is big more; Friction force is big more, therefore can not form leakage path, thereby can accomplish the external pressure test of appearance pipe smoothly.
Owing to will do the composite force cyclic test, often to suppress, the pressure release cyclic test, this cyclic test also can guarantee.After pressure release, because the precompression when having initial installation between sealing rubber ring 4 and external pressure vessel 7 and the appearance pipe 9, so suppress seal process when repeating above-mentioned suppressing after the pressure release again, so suppress repeatedly, the pressure release cyclic test can accomplish smoothly.
The domestic material preferably of sealing rubber ring 4 usefulness is used for the utility model and also can carries out the external pressure failure test.
Claims (2)
1. oil pipe external pressure sealing experiment device, it is characterized in that: this experimental provision includes the first fastening gland (1), sunk screw (2), pressure ring (3), sealing rubber ring (4), the second fastening gland (5); The said first fastening gland (1) is the parts in identical inside and outside footpath with the second fastening gland (5); Inner radius at the first fastening gland (1) and the corresponding end face of the second fastening gland (5) is respectively equipped with groove; Said pressure ring (3) is loaded in the groove respectively; Between fastening gland (1) and the corresponding end face of the second fastening gland (5), be provided with sealing rubber ring (4); Said sunk screw (2) passes fastening gland (1), sealing rubber ring (4) and the second fastening gland (5) successively, and fastening gland (1) is connected with the second fastening pressure ring (5) with O-ring seal (4).
2. oil pipe external pressure sealing experiment device according to claim 1 is characterized in that: the said first fastening gland (1) is provided with through hole, and the second fastening gland (5) is provided with tapped blind hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120514675XU CN202433243U (en) | 2011-12-09 | 2011-12-09 | External pressure seal test device for tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120514675XU CN202433243U (en) | 2011-12-09 | 2011-12-09 | External pressure seal test device for tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202433243U true CN202433243U (en) | 2012-09-12 |
Family
ID=46782683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120514675XU Expired - Lifetime CN202433243U (en) | 2011-12-09 | 2011-12-09 | External pressure seal test device for tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202433243U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364149A (en) * | 2013-07-29 | 2013-10-23 | 天津六〇九电缆有限公司 | Testing device and testing method for water tightness of cable |
| CN103760032A (en) * | 2014-01-17 | 2014-04-30 | 核工业理化工程研究院 | Resin matrix composite circular tube sealing experimental device |
-
2011
- 2011-12-09 CN CN201120514675XU patent/CN202433243U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364149A (en) * | 2013-07-29 | 2013-10-23 | 天津六〇九电缆有限公司 | Testing device and testing method for water tightness of cable |
| CN103760032A (en) * | 2014-01-17 | 2014-04-30 | 核工业理化工程研究院 | Resin matrix composite circular tube sealing experimental device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190702 Address after: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Patentee after: Tianjin Steel Tube Manufacturing Co., Ltd. Address before: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Patentee before: Tianjin Steel Pipe Group Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |