CN103711688A - Self-tightening sealing and stress testing device for self-enhancing of ultrahigh-pressure pump head body - Google Patents
Self-tightening sealing and stress testing device for self-enhancing of ultrahigh-pressure pump head body Download PDFInfo
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- CN103711688A CN103711688A CN201410019724.0A CN201410019724A CN103711688A CN 103711688 A CN103711688 A CN 103711688A CN 201410019724 A CN201410019724 A CN 201410019724A CN 103711688 A CN103711688 A CN 103711688A
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Abstract
The invention relates to a self-tightening sealing and stress testing device for self-enhancing of an ultrahigh-pressure pump head body, belonging to the technical field of self-enhancing of a pump head body of an ultrahigh-pressure container. The self-tightening sealing and stress testing device comprises an ultrahigh-pressure pump head body, a horizontal sealed taper rod, a signal lead-out seal taper, a horizontally sealed adjusting rod, an O-shaped seal ring, a signal lead-out rod, an organic glass sealed taper ring, quick-plugging joints, high-strength enameled wires, a strain gauge and a wiring transition plate. All sealing surfaces of the device adopt taper surface hard sealing, the higher the hydraulic pressure in the inner cavity of the pump head body is, the larger the pressure on the sealing surfaces is, and the reliability of sealing under ultrahigh pressure can be guaranteed; in assembling, the sealing of the sealing surfaces in low-pressure or non-pressure state can be controlled by thread pretightening force. The self-tightening sealing and stress testing device has the characteristics of being convenient to install, and convenient and fast to wire. According to the device, the difficulty in testing the stress of the container wall by leading out a wire from the ultrahigh-pressure sealed container can be solved by adopting the combined use of the organic glass sealed taper ring, the O-shaped seal ring and the wire lead-out rod.
Description
Technical field
The present invention relates to self-tightening sealing and the stress test device of the self intensification of a kind of ultrahigh pressure pump head body, belong 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 of pump head body is complicated, during 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.
It is a kind of effective measures that improve pump head body fatigue strength that self intensification is processed, 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, the process step of implementing self intensification due to pump head body is after inner chamber basic forming, make sealing means, pressure-bearing region and deformed region limited, be difficult to accomplish both to facilitate, realize safely, reliably sealing and pressurization, the deformation effect that can make again pump head body be subject to is minimum; 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 object of the invention is to, sealing and a test difficult problem for ultrahigh pressure pump head body self intensification technology, provide each sealing surface of a kind of whole device all to adopt the conical surface firmly to seal, pressure when hydraulic coupling in pump head body inner chamber is higher on sealing surface is larger, can guarantee the sealing reliability under ultrahigh pressure.And self-tightening sealing and the stress test device with 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 present invention realizes above-mentioned purpose by the following technical solutions:
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 comprised 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 above by hexagon thin nut and nylon spacer, is fixed with signal leading-off rods, 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 present invention's beneficial effect is compared with prior art:
1, the present invention 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 when low pressure or passive state can be controlled by the size of threaded pre-tightening power when assembling.
2, by conical surface seal, hydraulic coupling can be resolved into axially 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, solved 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 comprised 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 on ultrahigh pressure pump head body 1 inner chamber cross through hole intersecting line place near, on it, be coated with the protective coating of rosin and vaseline blending agent 22.
Described horizontal seal cone bar 2, signal drawn sealing cone 5, male cone (strobilus masculinus) seal ring 9 and inner conical surface seal ring 10 and 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 to intersecting line place, carry out secondary operations, 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.Soon six groups of signal leading-off rods 15, plexiglass sealing conical ring 16, O RunddichtringO 14, nylon spacers 13 are arranged on signal and draw in sealing cone 5, 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 comprised 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 annular groove is installed, 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 with fine-pointed forceps sub-folder, living two apertures on every catch, can conveniently install; After male cone (strobilus masculinus) nut 8 is in place, with hexagon wrench, screw the hexagon head of horizontal seal regulating lever 6 afterbodys, 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, with two hexagonal solid wrenchs, screw respectively the hexagon head at horizontal seal cone bar 2 and horizontal seal regulating lever 6 two ends, 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, with a minor diameter plastic flexible pipe, hydraulic oil is injected from the T-shaped hole of horizontal seal regulating lever 6, 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; In the time of 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 invention, above-mentioned not illustrating done any pro forma restriction to flesh and blood of the present invention, any simple modification or distortion that person of an ordinary skill in the technical field has done above embodiment according to technical spirit of the present invention after having read this specification, 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 solution of the present invention, and do not deviate from the spirit and scope of the invention.
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 comprised 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 above by hexagon thin nut (12) and nylon spacer (13), is fixed with signal leading-off rods (15), 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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| CN201410019724.0A CN103711688B (en) | 2014-01-16 | 2014-01-16 | The self-tightening sealing of a kind of ultrahigh pressure pump head body self intensification and stress test device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534091A (en) * | 2015-01-06 | 2015-04-22 | 长江大学 | Self-reinforced sealing structure of ultrahigh-pressure container |
| CN108037015A (en) * | 2017-12-17 | 2018-05-15 | 四川航空工业川西机器有限责任公司 | A kind of large diameter ultra high pressure cylinder for deep sea pressure simulation test |
| CN110848105A (en) * | 2019-11-20 | 2020-02-28 | 山东尤科斯石油装备有限公司 | Plunger pump hydraulic end assembly |
| CN111060305A (en) * | 2019-11-26 | 2020-04-24 | 安徽添御石油设备制造有限公司 | Pressure testing method for petroleum fracturing pump valve box |
| CN114837929A (en) * | 2022-04-21 | 2022-08-02 | 山东科瑞油气装备有限公司 | Pump head self-reinforcing device and matching process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108037015A (en) * | 2017-12-17 | 2018-05-15 | 四川航空工业川西机器有限责任公司 | A kind of large diameter ultra high pressure cylinder for deep sea pressure simulation test |
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| CN111060305A (en) * | 2019-11-26 | 2020-04-24 | 安徽添御石油设备制造有限公司 | Pressure testing method for petroleum fracturing pump valve box |
| CN114837929A (en) * | 2022-04-21 | 2022-08-02 | 山东科瑞油气装备有限公司 | Pump head self-reinforcing device and matching process |
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| CN103711688B (en) | 2015-09-09 |
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