CN103557399B - Card-type quick pressure tester for pipe orifice - Google Patents
Card-type quick pressure tester for pipe orifice Download PDFInfo
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- CN103557399B CN103557399B CN201310576902.5A CN201310576902A CN103557399B CN 103557399 B CN103557399 B CN 103557399B CN 201310576902 A CN201310576902 A CN 201310576902A CN 103557399 B CN103557399 B CN 103557399B
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- card
- blind plate
- anchor fluke
- gland
- wedge slot
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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Abstract
The invention discloses a kind of Card-type quick pressure tester for pipe orifice, comprise blind plate, the end facing water of described blind plate is provided with sealing; The cylindrical of described blind plate is provided with multiple wedge slot, and multiple described wedge slot is along the excircle of described blind plate to uniform, and the bottom land of described wedge slot only begins to be increased to gradually the outer peripheral surface of described blind plate from the backwater end of described blind plate; The wedge shape card with its adaptation is provided with in described wedge slot, the outer surface of described card is concordant with the periphery of described blind plate, the outer surface of described card is provided with the anchor fluke that multiple tracks tilts, described anchor fluke is arranged along the width direction of described card, the outer end of described anchor fluke is high inner low, described in multiple tracks, anchor fluke is parallel to each other, and the outer end of described card is provided with card gland.The present invention utilizes wedge principle, adopts and arrange card on blind plate, and blind plate is fixed on pipeline by card, and finally reaches the object making blind plate bear pipe interior hydrostatic test load.
Description
Technical field
The present invention relates to a kind of mouth of pipe pressure tester, particularly relate to a kind of Card-type quick pressure tester for pipe orifice.
Background technique
Pipework is installed and to be terminated or after prefabrication of tube section completes, and all will carry out hydraulic pressure or pneumatic test to check intensity and the leakproofness of pipeline.Wafer type blind plate can be installed by test after pipe-line system isolation for Flange joint position, and to welded connection position, as the tie point in different process district, then need to weld temporary stop plate on the mouth of pipe and carry out aptitude tests after pipeline isolation, and after zones of different duct test, again need connect head and again RT inspection be carried out to last weld bond.And for prefabricated tube section, pipeline section test has been difficult to by the mode of routine, therefore pipeline can not eliminate rust to welding part and priming paint construction in precasting yard, prefabricated weld bond is placed for a long time and be there will be corrosion, and after installing, independent welded junction part is eliminated rust and anticorrosion construction, not only operating difficulties, and be difficult to reach quality requirement, need the duct test instrument developing the connection of a set of non-solder for this reason, both facility was installed, can sealing effect be reached again, avoid current after mouth of pipe welding blind plate, off-test cutting operation again, reduce engineering cost.
Summary of the invention
The present invention provides a kind of Card-type quick pressure tester for pipe orifice for solving in known technology the technical problem that exists, and this pressure tester is easy to use, reliable performance.
The technological scheme that the present invention takes for the technical problem existed in solution known technology is: a kind of Card-type quick pressure tester for pipe orifice, comprise blind plate, the end facing water of described blind plate is provided with O RunddichtringO I and O RunddichtringO II, described O RunddichtringO II clamps between interior sealing gland and described blind plate, described interior sealing gland is connected on described blind plate by fixing bolt, the outer surface of described interior sealing gland is provided with the conical surface that ecto-entad shrinks gradually, described interior sealing gland the conical surface and treat between test tube road, to be provided with described O RunddichtringO I; The cylindrical of described blind plate is provided with multiple wedge slot, and multiple described wedge slot is along the excircle of described blind plate to uniform, and the bottom land of described wedge slot only begins to be increased to gradually the outer peripheral surface of described blind plate from the backwater end of described blind plate; The wedge shape card with its adaptation is provided with in described wedge slot, the outer surface of described card is concordant with the periphery of described blind plate, the outer surface of described card is provided with the anchor fluke that multiple tracks tilts, described anchor fluke is arranged along the width direction of described card, the outer end of described anchor fluke is high inner low, described in multiple tracks, anchor fluke is parallel to each other, and the outer end of described card is provided with card gland, and described card gland is fixed on described blind plate by card gland bolt.
The advantage that the present invention has and good effect are: utilize wedge principle, adopt and arrange card on blind plate, blind plate is fixed on pipeline by card, and finally reach the object making blind plate bear pipe interior hydrostatic test load; Sealing effect is reached by arranging the sealing of O type circle; The present invention is easy to use, reliable performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is card structure schematic diagram of the present invention;
Fig. 3 is stress model figure of the present invention;
Fig. 4 is the force analysis figure of card of the present invention;
Fig. 5 is card of the present invention and the schematic diagram waited to try inner-walls of duct and be engaged;
Fig. 6 is the plan view of card in calculated examples of the present invention;
Fig. 7 is the side view of Fig. 6.
In figure: 1, treat test tube road, 1-1, wait to try inner-walls of duct, 2, fixing bolt, 3, O RunddichtringO I, 4, interior sealing gland, 5, O RunddichtringO II, 6, blind plate, 6-1, wedge slot, 7, card, 7-1, anchor fluke, 8, card gland, 9, card gland bolt.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 ~ Fig. 2, a kind of Card-type quick pressure tester for pipe orifice, comprise blind plate 6, the end facing water of described blind plate 6 is provided with O RunddichtringO I 3 and O RunddichtringO II 5, O RunddichtringO II 5 clamps between interior sealing gland 4 and described blind plate 6, interior sealing gland 4 is connected on described blind plate 6 by fixing bolt 2, and the outer surface of interior sealing gland 4 is provided with the conical surface that ecto-entad shrinks gradually, interior sealing gland 4 the conical surface and treat to be provided with O RunddichtringO I 3 between test tube road 1.Described O RunddichtringO I 3 is for interior sealing gland 4 and treat between test tube road sealing, and O RunddichtringO II 5 is for the sealing between interior sealing gland 4 and blind plate 6, and two seals ensures the sealing completely treating test tube road 1 closed test press water.The cylindrical of described blind plate 6 is provided with multiple wedge slot 6-1, and multiple wedge slot 6-1 is along the excircle of described blind plate 6 to uniform, and the bottom land of described wedge slot 6-1 only begins to be increased to gradually the outer peripheral surface of described blind plate 6 from the backwater end of described blind plate 6; The wedge shape card 7 with its adaptation is provided with in wedge slot 6-1, the outer surface of described card 7 is concordant with the periphery of described blind plate 6, the outer surface of described card 7 is provided with multiple tracks inclination anchor fluke 7-1, anchor fluke 7-1 arranges along the width direction of card 7, the outer end of anchor fluke 7-1 is high, inner low, multiple tracks anchor fluke 7-1 is parallel to each other, and the outer end of card 7 is provided with card gland 8, and card gland 8 is fixed on blind plate 6 by card gland bolt 9.
The job step of above-mentioned pressure tester:
One) pressure tester is installed: after completing the installation of 2 O type circles, pressure tester is pushed the port treating test tube road 1;
Two) pretension: first fastening card gland bolt 9, after making card stressed, forms the pressure to tube wall, anchor fluke 7-1 tentatively "bite" to and treats on examination inner-walls of duct 1-1.Refer to Fig. 5.
Three) supercharging: to treating injection pressure water in test tube road 1, along with the rising of pressure, anchor fluke " occlusion " enters to wait that the degree of depth trying inner-walls of duct 1-1 increases, and forms larger resistant slide ability, ensures that pressure tester is securely fixed in the port for the treatment of test tube road 1;
Four) voltage stabilizing: in the voltage stabilizing stage, keep pressure constant, the stressed of pressure tester does not also change;
Five) pressure release: will treat that the pressure testing water discharge of inside, test tube road 1 is clean;
Six) pressure tester is removed: unclamp card gland bolt 9, internally promotes PRESSURE TESTING BLIND FLANGE 6, makes card 7 and wait to try the earth pressure release between inner-walls of duct 1-1, be i.e. dismountable pressure tester.
Above-mentioned pressure tester utilizes the anchor fluke of card, the wedge-shaped structure of card makes card be snapped to treat on the inwall in test tube road, uses 2 road O types sealings to reach the object of pipeline pressure test, safe and reliable.
Refer to Fig. 3 ~ Fig. 5, design calculation process is as follows:
One) force analysis of card
Different size treat that test tube road all adopts identical card, number of cards is determined by pipe diameter and test pressure, and card is arranged according to even number, so that the processing of blind plate.
Refer to Fig. 4, the force analysis of single anchor fluke on card:
N=P/tan β (formula 1)
F=N/cos β (formula 2)
L=S/tan β (formula 3)
F=μ N (formula 4)
P=π r
2p
test(formula 5)
Wherein: the power of pressure to card in P-hydraulic test of pipeline; F-P is to the positive pressure of card; N-P is to the positive pressure of anchor fluke on blind plate; F-N formed frictional force, μ-anchor fluke with wait the friction factor trying inner-walls of duct, get μ=0.1; The cone angle of β-card, in the present embodiment β=13 °, the axial stroke amount of L-blind plate; The radial stroke amount of S-anchor fluke; P
test-hydrostatic test pressure, r tries internal diameter of the pipeline for waiting.
When pressure tester uses, the anchor fluke of card with wait that trying inner-walls of duct " is engaged ", when the anchor fluke degree of depth be engaged into tube wall is H, wait to try inner-walls of duct 1-1 by anchor fluke " occlusion " to the transition point of resiliently deformable and plastic deformation, H presses 0.5mm calculating in the present embodiment, an anchor fluke length W, card number N, anchor fluke number of channels n on each card, card is being engaged into after examination inner-walls of duct 1-1, and the maximum shear(ing) area of its card is A:
A=HWNn (formula 6)
The maximum shearing resistance that anchor fluke is formed because of occlusion is: G=A* ﹝ τ ﹞ (formula 7)
In formula: ﹝ τ ﹞ is the shear strength allowable of anchor fluke.
In the pipe that pressure tester blind plate can be resisted test pressure Q by anchor fluke because the frictional force trying inner-walls of duct for the treatment of being engaged the maximum shearing resistance that formed and formed by internal pressure forms, i.e. Q=G+f (formula 8)
Two) pipe force analysis
Anchor fluke " occlusion " enters to treat examination inner-walls of duct 1-1, and the shear plane length S of formation is all anchor fluke length summations, and namely S=N*n*W, W are the length of an anchor fluke.Treat that the shearing area that examination inner-walls of duct 1-1 is formed because of anchor fluke " occlusion " is: A1=S*W1, W1 are the distance between adjacent twice anchor fluke.Then wait that the maximum shearing resistance trying inner-walls of duct 1-1 is Q1:
Q1=A1* ﹝ τ 1 ﹞ (formula 9)
In formula: ﹝ τ 1 ﹞ is the shear strength allowable waiting to try inner-walls of duct.
Three) result of determination: as Q≤P, and during Q1≤Q, can not there is slippage in card fixation, meets the requirement of inner pressure testing water pressure.
Four) THICKNESS OF PRESSURE TESTING BLIND FLANGE calculates
The test blind plate thickness equations provided according to " pipeline construction service manual ":
(formula 10)
In formula: δ-blind plate thickness, unit mm;
K-conditional coefficient, gets 0.4;
D-blind plate diameter, unit mm;
P
test-test pressure, units MPa;
[σ]-material allowable stress, units MPa;
Calculate test blind plate thickness after, need to adjust according to the length of card, namely the thickness S of blind plate also needs to meet: 5mm at least larger than card length so that on blind plate processing wedged groove, for installing card.
Refer to Fig. 6 ~ Fig. 7, calculated example:
DN150 pipe (φ 168*10, r=74mm), design pressure 2.0MPa, test pressure 3.0MPa, adopt 8 cards settings, blind plate thickness to be the pressure tester of 30mm.
(1) axial force of inner pressure testing water is: P=3.14*7.42*3.0*10=5158.4(kg)
(2) the solid power of card calculates
Anchor fluke length W can calculate by its central diameter arc length, that is:
W=2πr*9.5/360=2*3.14*74*9.5/360=12.3（mm）
The cone angle of wedge shape card is β=13 °, N=P/tan β=22428(kg), f=μ N=0.1*22428=2242.8 (kg),
Employ card, the anchor fluke of card " will be engaged " with tube wall, and its stressed being "bite" to by tube wall according to card is plastic deformation to that it is maximum stressed.
Anchor fluke height (being engaged into the tube wall) H of card calculates according to 0.5mm, and anchor fluke length W is that 12.3mm(calculates according to 12mm calculating), amount to 8 cards (i.e. N=8, each card anchor fluke number of channels n=8), add up to 96mm.
Material is 35CrMo, tensile strength sigma b >=620Mpa, yield strength σ s >=440Mpa, and its allowable stress is [σ] is 230MPa, [τ]=[σ]/1.5 ≈ 153(MPa).
Each card anchor fluke shear(ing) area is 0.5mm*12mm*8=42mm2, and 8 circle anchor flukes are grabbed into tube wall 0.5mm, then the lifting surface area on card is A=HWNn=0.5*12*8*8=384(mm2).
The maximum surrender of card anchor fluke is stressed is: G=A* ﹝ τ ﹞=384/100*153*10 ≈ 5875 (kg)
Then in the pipe that can resist of pressure tester blind plate, test pressure is: Q=G+f=5875+2242.8=8117.8(kg)
Then Q>P, this pressure tester can bear the pressure of the test(ing) medium of its internal pipeline.
(2) tube wall is stressed
20 steel tensile strength sigma b >=410Mpa, yield strength σ s >=235Mpa, allowable stress be [σ] be 152MPa, permitting stress [τ]=[σ]/1.5 ≈ 101(MPa).
Calculate according to 101MPa, the sub-inner wall surface H=0.5mm of anchor fluke " occlusion " inlet pipe, length W=12mm, the shear plane length S=NnW=12*8*8=768mm formed, two " anchor fluke " spacing are W1=4mm, its shearing resistance cross section is 768*4=3072(mm2), then shear resistance is Q1=3072/100*101*10=31027 (kg).
Because of Q1>Q, therefore " occlusion " of tube wall can bear the hydraulic coupling of pressure tester.
(3) blind plate force analysis
Blind plate adopts Q235 to manufacture, thickness 30mm, and check its intensity under above-mentioned pressure, from formula 10, pressure testing minimum thickness is:
This pressure tester have employed 30mm steel plate and makes, and meets the demands.
Blind plate uses the steel plate processing of more than Q235 grade, and when pressure tester is reused, use 30CrMo steel, Quenching Treatment, to increase its intensity; Card 35CrMo material, processing after-baking, its hardness >HB350.Card should be coated with when installing and anti-ly be engaged oiling agent in the groove of card with blind plate, ensures its good lubrication; But inner tube wall should be cleaned out, without greasy dirt.
Working principle of the present invention:
After pipe interior is full of test water, under pressure, to the thrust P of pressure tester by a generation axis, pressure tester will bear the thrust P of this axis, to ensure that pipe-line system is closed.
At pressure tester and tube wall binding site, one cartridge type wedge-shaped blocks (card) is set, the pretightening force of card is utilized to be fastened on tube wall by card, when after internal pressurization, due to the effect of card, along with the increase of pressure, pressure between card and pipe also in increase, ensures that pressure tester is fixed on initial position, reaches test requirements document.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (1)
1. a Card-type quick pressure tester for pipe orifice, it is characterized in that, comprise blind plate, the end facing water of described blind plate is provided with O RunddichtringO I and O RunddichtringO II, described O RunddichtringO II clamps between interior sealing gland and described blind plate, described interior sealing gland is connected on described blind plate by fixing bolt, and the outer surface of described interior sealing gland is provided with the conical surface that ecto-entad shrinks gradually, described interior sealing gland the conical surface and treat between test tube road, to be provided with described O RunddichtringO I; The cylindrical of described blind plate is provided with multiple wedge slot, and multiple described wedge slot is along the excircle of described blind plate to uniform, and the bottom land of described wedge slot only begins to be increased to gradually the outer peripheral surface of described blind plate from the backwater end of described blind plate; The wedge shape card with its adaptation is provided with in described wedge slot, the outer surface of described card is concordant with the periphery of described blind plate, the outer surface of described card is provided with the anchor fluke that multiple tracks tilts, described anchor fluke is arranged along the width direction of described card, the outer end of described anchor fluke is high inner low, described in multiple tracks, anchor fluke is parallel to each other, and the outer end of described card is provided with card gland, and described card gland is fixed on described blind plate by card gland bolt.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576902.5A CN103557399B (en) | 2013-11-14 | 2013-11-14 | Card-type quick pressure tester for pipe orifice |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576902.5A CN103557399B (en) | 2013-11-14 | 2013-11-14 | Card-type quick pressure tester for pipe orifice |
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| Publication Number | Publication Date |
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| CN103557399A CN103557399A (en) | 2014-02-05 |
| CN103557399B true CN103557399B (en) | 2015-09-30 |
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| CN103775783A (en) * | 2014-02-14 | 2014-05-07 | 新兴能源装备股份有限公司 | Pressure testing tool for external pipeline of gas storage bottle group in station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2974685A (en) * | 1957-08-23 | 1961-03-14 | Williamson Inc T | Pipe plug |
| US4282982A (en) * | 1980-03-11 | 1981-08-11 | Alfred Nuesslein | Tube closure device |
| JP2796927B2 (en) * | 1993-11-12 | 1998-09-10 | 東京瓦斯株式会社 | Jig for pressure test |
| JP4416237B2 (en) * | 1999-07-05 | 2010-02-17 | Ｊｆｅ継手株式会社 | Port closure device for resin pipe |
| CN203533074U (en) * | 2013-11-14 | 2014-04-09 | 中石化第四建设有限公司 | Clamp type fast orifice pressure test device |
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