CN203685548U - Self-tightening seal and stress testing device for autofrettage of ultrahigh-pressure pump head - Google Patents
Self-tightening seal and stress testing device for autofrettage of ultrahigh-pressure pump head Download PDFInfo
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- CN203685548U CN203685548U CN201420027052.3U CN201420027052U CN203685548U CN 203685548 U CN203685548 U CN 203685548U CN 201420027052 U CN201420027052 U CN 201420027052U CN 203685548 U CN203685548 U CN 203685548U
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Abstract
The utility model relates to a self-tightening seal and stress testing device for autofrettage of an ultrahigh-pressure pump head and belongs to the technical field of autofrettage of pump heads of ultrahigh-pressure vessels. The self-tightening seal and stress testing device is composed of the ultrahigh-pressure pump head, a horizontal seal cone rod, a signal lead-out seal cone, a horizontal seal adjusting rod, an O-type seal ring, a signal lead-out rod, an organic glass seal cone ring, a quick plug connector, a high-strength varnished wire, a strain foil and a wiring transition plate. Conical-surface hard seals are adopted for all the sealing surfaces of the self-tightening seal and stress testing device, pressure on the sealing surfaces is higher when the hydraulic pressure in an inner cavity of the pump head is higher, and therefore sealing reliability under ultrahigh pressure can be ensured. The sealing performance of all the sealing surfaces in a low pressure state or a non-pressure state can be controlled through threaded pre-tightening force in the assembly process. Moreover, the self-tightening seal and stress testing device has the advantages of being convenient to install and convenient and fast to wire. According to the self-tightening seal and stress testing device, the organic glass seal cone ring, the O-type sealing and a wire lead-out rod are used in combination, so that the problem of testing stress on a vessel wall in real time by leading out a wire from an ultrahigh-pressure sealed vessel is solved.
Description
Technical field
The utility model relates to self-tightening sealing and the stress test device of a kind of ultrahigh pressure pump head body self intensification, belongs to the pump head body self intensification technical field of ultrahigh pressure vessel.
Background technique
In oil and gas exploitation, the hole between Oil/gas Well and oil-gas layer is undeveloped or blocked, can have a strong impact on oil gas well yield.Therefore, be necessary to improve artificially the physical arrangement of oil-gas layer, expand, extend, dredge formation pore, reduce gas stream dynamic resistance, improve stratum penetrating power.Facts have proved, fracturing technology is one of effective measures of realizing this object.The main equipment of implementing fracturing work is fracturing pump, and the pump head body of fracturing pump is expensive easily damaged parts.The inner-cavity structure complexity of pump head body, when work, bear the fracturing fluid effect of the above ultrahigh pressure pulsation of 100MPa circulation, under the effect of alternating stress and aggressive medium, near the intersecting line of its inner chamber, stress concentration phenomenon is obvious, easily germinates fatigue crack expansion rapidly.
Self intensification processing is a kind of effective measures that improve pump head body fatigue strength, its essence is the pump head body before being on active service is applied to the interior pressure (400～500MPa) more much higher than working pressure, make inner layer material, under the effect of superhigh pressure liquid, plastic deformation occur, and cladding material is still in the resiliently deformable stage, after internal high pressure removal, cladding material compression inner layer material, makes surface of internal cavity produce residual compressive stress.The pressure medium impact of the existence of residual compressive stress in can partial offset pump head body inner chamber, therefore, pump head body integrated stress distributes more even, particularly can improve the stress concentration status at intersecting line place in pump head body, thereby the fatigue strength of member is greatly improved.
Adopting hydraulic oil pressurization is the pressuring method of the most applicable pump head body self intensification at present, after the four direction plug for seal in the inner criss-crossing of pump head body hole, to its inner highly pressurised liquid that injects.On the one hand, because pump head body is implemented the process step of self intensification after inner chamber basic forming, make sealing means, pressure-bearing region and deformed region limited, be difficult to accomplish both to facilitate, realize sealing safely, reliably and pressurize, the deformation effect minimum that can make again pump head body be subject to; On the other hand, in pump head body self intensification pressure process, STRESS VARIATION and the residual-stress value in cavity inner surface intersecting line region are significant datas, and the stress value of Measurement accuracy ultrahigh pressure cavity inner surface is also transferred to outside pump head body, and difficulty is very large.The technical barrier of above two aspects has limited the application of self intensification technology on pump head body.
Summary of the invention
The purpose of this utility model is, for sealing and the test difficult problem of ultrahigh pressure pump head body self intensification technology, provide a kind of each sealing surface of whole device all to adopt the conical surface firmly to seal, pressure in the time that the hydraulic coupling in pump head body inner chamber is higher on sealing surface is larger, can guarantee the sealing reliability under ultrahigh pressure.And there is self-tightening sealing and the stress test device of the ultrahigh pressure pump head body self intensification of the features such as easy for installation, initial pretightening force is controlled, easy-to-connect is quick.
The utility model is to realize by the following technical solutions above-mentioned purpose:
The self-tightening sealing of this ultrahigh pressure pump head body self intensification and stress test device are drawn sealing cone, horizontal seal regulating lever, O RunddichtringO, signal leading-off rods, plexiglass by ultrahigh pressure pump head body, horizontal seal cone bar, signal and are sealed conical ring, plug joint, high strength enamelled wire, foil gauge and wiring transition plate soon and form, and it is characterized in that:
In ultrahigh pressure pump head body, be manufactured with the crossing cross through hole of horizontal and vertical, the left end of horizontal through hole is plunger cavity, right-hand member is plug chamber, horizontal seal cone bar is installed in left end plunger cavity, right-hand member plug is provided with horizontal seal regulating lever in chamber, horizontal seal cone bar and horizontal seal regulating lever are threaded connection, the right-hand member of horizontal seal regulating lever is equipped with sealing flat gasket from inside to outside successively, male cone (strobilus masculinus) seal ring, inner conical surface seal ring, the axial back-up ring combination of annular distance and male cone (strobilus masculinus) nut, the axial back-up ring combination of annular distance is made up of the axial D shape of two rings hole axial C shape catch and two rings hole catch, the right-hand member of horizontal seal regulating lever by male cone (strobilus masculinus) seal ring and inner conical surface seal ring radial support on ultrahigh pressure pump head body,
The upper end of vertical through hole is discharge side, and lower end is suction chamber, signal is housed respectively in discharge side and suction chamber and draws sealing cone, and signal is drawn sealing cone and is bolted on ultrahigh pressure pump head body by pretension perforated pan and prefastening force; Signal is drawn sealing cone and is above fixed with signal leading-off rods by hexagon thin nut and nylon spacer, on signal leading-off rods, be set with O RunddichtringO and plexiglass sealing conical ring, the top of signal leading-off rods and bottom are plugged with fast plug joint, on the fast plug joint of bottom, high strength enamelled wire are installed; The other end of high strength enamelled wire is connected with foil gauge and wiring transition plate, and foil gauge and wiring transition plate stick on the intersecting line place of the cross through hole of ultrahigh pressure pump head intracoelomic cavity, is coated with the protective coating of rosin and vaseline blending agent on it.
The utility model beneficial effect is compared with prior art:
1, the utility model is because each sealing surface is all that the conical surface seals firmly, and the pressure on the highly denser front cover of hydraulic coupling in pump head body inner chamber is larger, can guarantee the sealing reliability under ultrahigh pressure.And the sealing of each sealing surface in the time of low pressure or passive state can be controlled by the size of threaded pre-tightening power in the time of assembling.
2, hydraulic coupling can be resolved into axially by conical surface seal and two component radially, reduce near localized stress pump head body sealing surface, can effectively protect material and the cylindricity for inside diameter of pump head body.
3, adopt the axial back-up ring combination of annular distance to be used in conjunction with male cone (strobilus masculinus) nut, realized axially locating, back-up ring can be thickeied, widen, and makes it have enough intensity; And the needed annular space of annular distance axial back-up ring combination installation is little, easy for installation.
4, by adopting plexiglass sealing conical ring, O RunddichtringO and wire leading-off rods to be used in combination, solve and from super-high pressure sealed container, drawn wire, a difficult problem for real-time testing wall stress, provides immediate data to the closed loop control of pump head body self intensification implementation process.
Accompanying drawing explanation
Fig. 1 is the self-tightening sealing of a kind of ultrahigh pressure pump head body self intensification and the structural representation of stress test device;
Fig. 2 is the sealed structural representation in ultrahigh pressure pump head body plug hole;
Fig. 3 is the structural representation of the axial back-up ring combination of annular distance;
Fig. 4 is that ultrahigh pressure pump head body sucks, the sealed structural representation of tap hole;
Fig. 5 is the structural representation of strain gauge adhesion and protection.
In figure: 1, ultrahigh pressure pump head body, 2, horizontal seal cone bar, 3, pretension perforated pan, 4, prefastening force bolt, 5, signal is drawn sealing cone, 6, horizontal seal regulating lever, 7, sealing flat gasket, 8, male cone (strobilus masculinus) nut, 9, male cone (strobilus masculinus) seal ring, 10, inner conical surface seal ring, 11, the axial back-up ring combination of annular distance, 12, hexagon thin nut, 13, nylon spacer, 14, O RunddichtringO, 15, signal leading-off rods, 16, plexiglass sealing conical ring, 17, fast plug joint, 18, high strength enamelled wire, 19, the axial C shape of annular distance catch, 20, the axial D shape of annular distance catch, 21, foil gauge, 22, rosin and vaseline blending agent, 23, wiring transition plate.
Embodiment
The self-tightening sealing of this ultrahigh pressure pump head body self intensification and stress test device are by ultrahigh pressure pump head body 1, horizontal seal cone bar 2, pretension perforated pan 3, prefastening force bolt 4, signal is drawn sealing cone 5, horizontal seal regulating lever 6, sealing flat gasket 7, male cone (strobilus masculinus) nut 8, male cone (strobilus masculinus) seal ring 9, inner conical surface seal ring 10, the axial back-up ring combination 11 of annular distance, hexagon thin nut 12, nylon spacer 13, O RunddichtringO 14, signal leading-off rods 15, plexiglass sealing conical ring 16, fast plug joint 17, high strength enamelled wire 18, foil gauge 21 and wiring transition plate 23 form.
In ultrahigh pressure pump head body, be manufactured with the crossing cross through hole of horizontal and vertical, the left end of horizontal through hole is plunger cavity, right-hand member is plug chamber, horizontal seal cone bar 2 is installed in left end plunger cavity, right-hand member plug is provided with horizontal seal regulating lever 6 in chamber, and horizontal seal cone bar 2 and horizontal seal regulating lever 6 are together by a threaded connection; The right-hand member of horizontal seal regulating lever 6 is equipped with sealing flat gasket 7, male cone (strobilus masculinus) seal ring 9, inner conical surface seal ring 10, the axial back-up ring combination 11 of annular distance and male cone (strobilus masculinus) nut 8 from inside to outside successively, the axial back-up ring of annular distance combination 11 is made up of two rings hole axial C shape catch 19 and two rings hole axial D shape catch 20, the right-hand member of horizontal seal regulating lever 6 by male cone (strobilus masculinus) seal ring 9 and inner conical surface seal ring 10 radial support on ultrahigh pressure pump head body 1.
The upper end of vertical through hole is discharge side, and lower end is suction chamber, signal is housed respectively in discharge side and suction chamber and draws sealing cone 5, and signal is drawn sealing cone 5 and is fixed on ultrahigh pressure pump head body 1 by pretension perforated pan 3 and prefastening force bolt 4; Signal is drawn on sealing cone 5 and is fixed with signal leading-off rods 15 by hexagon thin nut 12 and nylon spacer 13, on signal leading-off rods 15, be set with O RunddichtringO 14 and plexiglass sealing conical ring 16, the top of signal leading-off rods 15 and bottom are plugged with fast plug joint 17, on the fast plug joint 17 of bottom, high strength enamelled wire 18 is installed, high strength enamelled wire 18 forms signal with fast plug joint 17 derives line, and plugging soon joint 17 can insert rapidly or extract on signal leading-off rods 15.The other end of high strength enamelled wire 18 is connected with foil gauge 21 and wiring transition plate 23, foil gauge 21 and wiring transition plate 23 stick near at the intersecting line place of the cross through hole of ultrahigh pressure pump head body 1 inner chamber, are coated with the protective coating of rosin and vaseline blending agent 22 on it.
Described horizontal seal cone bar 2, signal are drawn sealing cone 5, male cone (strobilus masculinus) seal ring 9 and inner conical surface seal ring 10 and are adopted than the material that hardness is low, plasticity is good of ultrahigh pressure pump head body 1, as No. 20 steel, to guarantee that the conical surface is firmly sealed under ultrahigh pressure state and can has very high laminating degree.Sealing flat gasket 7 is selected Cu alloy material, under ultrahigh pressure effect, has compared with large plastometric set ability.Ultrahigh pressure pump head body 1 is before self intensification treatment process, the cross through hole of inner chamber and the processing of intersecting line fillet need to be put in place, after self intensification is finished dealing with, will no longer carry out secondary operations to intersecting line place, its objective is and make effective residual stress at intersecting line place not because processing is subdued.(referring to accompanying drawing 1～5).
The self-tightening sealing of this ultrahigh pressure pump head body self intensification and the installation process of stress test device are as follows:
First ultrahigh pressure pump head body 1 inner chamber the intersecting line fillet of cross through hole near, be 90 ° of crisscross polishing paster positions, use again 502 glue by foil gauge 21 and wiring transition plate 23 firm pastings, connect that high strength enamelled wire 18 is rear smears protection foil gauge 21 and wiring transition plate 23 with rosin and vaseline blending agent 22, form protective coating.
Secondly, at suction chamber and the discharge side of ultrahigh pressure pump head body 1 Vertical direction, self-tightening sealing and stress test device are installed.Be arranged on signal and draw in sealing cone 5 by six groups of signal leading-off rods 15, plexiglass sealing conical ring 16, O RunddichtringO 14, nylon spacer 13, tighten hexagon thin nut 12, make signal leading-off rods 15 that plexiglass is sealed to conical ring 16 and be pressed in tightly in taper hole, reach the object of initial sealing.And plexiglass sealing conical ring 16, O RunddichtringO 14 and nylon spacer 13 make signal leading-off rods 15 and signal draw insulation between sealing cone 5.The signal assembling is drawn sealing cone 5 and is entered inner chamber from ultrahigh pressure pump head body 1 plug chamber, is respectively installed to after the sealing cone of suction chamber and discharge side, and dress pretension perforated pan 3, and tighten and form initial sealing power with prefastening force bolt 4.Fast plug joint 17 is plugged at signal leading-off rods 15 two ends, and the electric signal transmission that can very easily foil gauge 21 be produced is outside ultrahigh pressure pump head body 1.
Then, in the plunger cavity of ultrahigh pressure pump head body 1 substantially horizontal and plug chamber, self-tightening sealing device is installed.The outside thread of horizontal seal being bored to bar 2 is screwed in the tapped hole of horizontal seal regulating lever 6 completely, after both are become one, from the combination of plug chamber load level sealing cone bar 2 and horizontal seal regulating lever 6; Pack successively again sealing flat gasket 7, male cone (strobilus masculinus) seal ring 9, inner conical surface seal ring 10, the axial back-up ring combination 11 of annular distance and male cone (strobilus masculinus) nut 8 into.Wherein, the axial back-up ring combination 11 of annular distance is made up of two rings hole axial C shape catch 19 and two rings hole axial D shape catch 20, the annular space forming, packs into from ultrahigh pressure pump head body 1 and horizontal seal regulating lever 6; Concrete encaseing method is: in installation annular groove, evenly smear appropriate butter, first fill two rings hole, left and right axial D shape catch 20, and then pack upper and lower two rings hole axial C shape catch 19 into, and living two apertures on every catch with fine-pointed forceps sub-folder, can conveniently install; After male cone (strobilus masculinus) nut 8 is in place, screw the hexagon head of horizontal seal regulating lever 6 afterbodys with hexagon wrench, apply prefastening torque to male cone (strobilus masculinus) nut 8, allow sealing flat gasket 7 obtain appropriate compressive strain, form initial sealing; Allow inner conical surface seal ring 10 under conical surface pressure-acting, have a certain amount of swelling, form initial sealing.
Finally, screw respectively the hexagon head at horizontal seal cone bar 2 and horizontal seal regulating lever 6 two ends with two hexagonal solid wrenchs, apply suitable moment of torsion and make the conical surface of plunger cavity form initial sealing.
The self-tightening sealing of this ultrahigh pressure pump head body self intensification and the working procedure of stress test device are as follows:
Under not pressurization situation, hydraulic oil is injected from the T-shaped hole of horizontal seal regulating lever 6 with a minor diameter plastic flexible pipe, make to be full of hydraulic oil in pump head body Seal cage.Then the fairlead joint in ultrahigh-pressure hydraulic source is connected with horizontal seal regulating lever 6 pipe thread, make hydraulic coupling can be applied to pump head body inner chamber, make it produce elasto plastic deformation.
Adopt the pressurization of ladder grade and release mode to implement hydraulic pressure self intensification.Pressurization time, take maximum from strengthen pressure P 5% as stride (be 5%P, 10%P, 15%P ..., 95%P, 100%P), reach after each stride pressure, voltage stabilizing 3 minutes also gather surface of internal cavity stress value one time; When release, take maximum from strengthen pressure P 10% as stride (be 90%P, 80%P, 70%P ..., 10%P, 0), reach after each stride pressure, voltage stabilizing 3 minutes also gather surface of internal cavity stress value one time.
The above is preferred embodiment of the present utility model, above-mentioned not illustrating done any pro forma restriction to flesh and blood of the present utility model, person of an ordinary skill in the technical field is reading any simple modification or the distortion after this specification, according to technical spirit of the present utility model, above embodiment done, and the technology contents that may utilize above-mentioned announcement is changed or is modified to the equivalent embodiment of equivalent variations, all still belong in the scope of technical solutions of the utility model, and do not deviate from essence of the present utility model and scope.
Claims (1)
1. self-tightening sealing and the stress test device of ultrahigh pressure pump head body self intensification, it is by ultrahigh pressure pump head body (1), horizontal seal cone bar (2), signal is drawn sealing cone (5), horizontal seal regulating lever (6), O RunddichtringO (14), signal leading-off rods (15), plexiglass sealing conical ring (16), fast plug joint (17), high strength enamelled wire (18), foil gauge (21) and wiring transition plate (23) form, it is characterized in that: in ultrahigh pressure pump head body (1), be manufactured with the crossing cross through hole of horizontal and vertical, the left end of horizontal through hole is plunger cavity, right-hand member is plug chamber, horizontal seal cone bar (2) is installed in left end plunger cavity, horizontal seal regulating lever (6) is installed in right-hand member plug chamber, horizontal seal cone bar (2) and horizontal seal regulating lever (6) are threaded connection, the right-hand member of horizontal seal regulating lever (6) is equipped with sealing flat gasket (7) from inside to outside successively, male cone (strobilus masculinus) seal ring (9), inner conical surface seal ring (10), the axial back-up ring combination of annular distance (11) and male cone (strobilus masculinus) nut (8), the axial back-up ring combination of annular distance (11) is made up of two rings hole axial C shape catch (19) and two rings hole axial D shape catch (20), the right-hand member of horizontal seal regulating lever (6) by male cone (strobilus masculinus) seal ring (9) and inner conical surface seal ring (10) radial support on ultrahigh pressure pump head body (1), the upper end of vertical through hole is discharge side, lower end is suction chamber, signal is housed respectively in discharge side and suction chamber and draws sealing cone (5), signal is drawn sealing cone (5) and is fixed on ultrahigh pressure pump head body (1) by pretension perforated pan (3) and prefastening force bolt (4), signal is drawn sealing cone (5) and is above fixed with signal leading-off rods (15) by hexagon thin nut (12) and nylon spacer (13), on signal leading-off rods (15), be set with O RunddichtringO (14) and plexiglass sealing conical ring (16), the top of signal leading-off rods (15) and bottom are plugged with fast plug joint (17), on the fast plug joint (17) of bottom, high strength enamelled wire (18) are installed, the other end of high strength enamelled wire (18) is connected with foil gauge (21) and wiring transition plate (23), foil gauge (21) and wiring transition plate (23) stick on the intersecting line place of the cross through hole of ultrahigh pressure pump head body (1) inner chamber, are coated with the protective coating of rosin and vaseline blending agent (22) on it.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027052.3U CN203685548U (en) | 2014-01-16 | 2014-01-16 | Self-tightening seal and stress testing device for autofrettage of ultrahigh-pressure pump head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027052.3U CN203685548U (en) | 2014-01-16 | 2014-01-16 | Self-tightening seal and stress testing device for autofrettage of ultrahigh-pressure pump head |
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| Publication Number | Publication Date |
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| CN203685548U true CN203685548U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420027052.3U Withdrawn - After Issue CN203685548U (en) | 2014-01-16 | 2014-01-16 | Self-tightening seal and stress testing device for autofrettage of ultrahigh-pressure pump head |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711688A (en) * | 2014-01-16 | 2014-04-09 | 长江大学 | Self-tightening sealing and stress testing device for self-enhancing of ultrahigh-pressure pump head body |
| CN104596691A (en) * | 2014-11-24 | 2015-05-06 | 宝鸡石油机械有限责任公司 | Method for testing pre-tightening force of underwater metal sealing gasket ring |
| CN107000136A (en) * | 2014-12-15 | 2017-08-01 | 瓦锡兰芬兰有限公司 | Produce the method for cylinder head, the cylinder head blank of internal combustion piston engine and the cylinder head for internal combustion piston engine |
| CN109612709A (en) * | 2018-12-28 | 2019-04-12 | 重庆红江机械有限责任公司 | A kind of compression test under super high is from pre- clamper |
-
2014
- 2014-01-16 CN CN201420027052.3U patent/CN203685548U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711688A (en) * | 2014-01-16 | 2014-04-09 | 长江大学 | Self-tightening sealing and stress testing device for self-enhancing of ultrahigh-pressure pump head body |
| CN103711688B (en) * | 2014-01-16 | 2015-09-09 | 长江大学 | The self-tightening sealing of a kind of ultrahigh pressure pump head body self intensification and stress test device |
| CN104596691A (en) * | 2014-11-24 | 2015-05-06 | 宝鸡石油机械有限责任公司 | Method for testing pre-tightening force of underwater metal sealing gasket ring |
| CN104596691B (en) * | 2014-11-24 | 2017-01-18 | 宝鸡石油机械有限责任公司 | Method for testing pre-tightening force of underwater metal sealing gasket ring |
| CN107000136A (en) * | 2014-12-15 | 2017-08-01 | 瓦锡兰芬兰有限公司 | Produce the method for cylinder head, the cylinder head blank of internal combustion piston engine and the cylinder head for internal combustion piston engine |
| CN109612709A (en) * | 2018-12-28 | 2019-04-12 | 重庆红江机械有限责任公司 | A kind of compression test under super high is from pre- clamper |
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Granted publication date: 20140702 Effective date of abandoning: 20150909 |
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