CN102346113A - Fatigue test sample clamp with high temperature resistance, high pressure resistance and aqueous corrosion resistance and usage method thereof - Google Patents
Fatigue test sample clamp with high temperature resistance, high pressure resistance and aqueous corrosion resistance and usage method thereof Download PDFInfo
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- CN102346113A CN102346113A CN2010102409113A CN201010240911A CN102346113A CN 102346113 A CN102346113 A CN 102346113A CN 2010102409113 A CN2010102409113 A CN 2010102409113A CN 201010240911 A CN201010240911 A CN 201010240911A CN 102346113 A CN102346113 A CN 102346113A
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Abstract
The invention belongs to the material test technical field, to be more exactly, relates to a fatigue test sample clamp with high temperature resistance, high pressure resistance and aqueous corrosion resistance and an usage method thereof, which solves the problems of high temperature irresistance, high pressure irresistance, aqueous corrosion, large screw thread slit and poor centering in the current sample clamp. The clamp is provided with a column, a platform, an upper press cap, a lower press cap and a conversion adapter; the lower part of the column of the clamp is fixed on a cover of an autoclave, the upper part of the column of the clamp is fixed on the platform, and respectively and tightly pressed by lock nuts, the lower part of the conversion adapter is connected with a stretching shaft of a fatigue machine, through elevating the stretching shaft, an upper convex plate and a lower convex plate of the test sample are respectively placed in a platform groove and a conversion adapter groove, two dimidiate semirings are pressed on upper convex plate and the lower convex plate of the test sample, the upper press cap and the lower press cap are sleeved, the press cap bolts are screwed for fixing two ends. The fatigue test sample clamp can be used in the autoclave for carrying out various fatigue tests (stress-stress, stress-tension, tension-tension and the like) under the high temperature high pressure solution environment, and has the advantages of simple structure and low cost.
Description
Technical field
The invention belongs to the material experiment technical field, more precisely, relate to a kind of high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps and method of application.
Background technology
Environment is master's industry such as oil, chemical industry, electric power with HTHP solution under arms, and serious etching problem often takes place its equipment, for example: stress corrosion, corrosion fatigue etc.; These etching problems make equipment of serious failure, and factory is compelled stops work, even major accident takes place; Cause huge economy and personal casualty loss; In order to understand fully the reason of accident, avoid accident to take place once more, must under the environment Corrosion Mechanism take place by the research equipment material under arms.The corrosion failure mechanism of studying these equipment and materialss at the laboratory simulation high temperature and high pressure environment is a kind of effective means, at first must solve the plant issue that makes an experiment under the high temperature and high pressure environment condition and carry out this type research.In laboratory simulation high-temperature high pressure water corrosion fatigue experiment, what at first will solve is the sample clamp problem, in order to simulate actual HTHP Service Environment; Sample clamp must be placed in the autoclave in experimentation; But sample clamp in the past is all for airborne experiment designs, and does not consider the influence of harsh corrosion environment to anchor clamps, therefore can not be used in the autoclave; Existing in addition fatigue machine anchor clamps are mostly with being threaded; The gap is very big, and the drawingand pressing fatigue experiment of inapplicable displacement control is difficult to guarantee to neutrality in addition.Though have major company of several family can make this anchor clamps that are used in the autoclave abroad, price is extremely expensive, and complex structure, and domestic relevant producer does not still make the experience and the ability of such anchor clamps.
Summary of the invention
The object of the invention be to provide a kind of can be under the HTHP water environment sample clamp and the method for application of test material Corrosion Fatigue Properties, solved existing fatigue machine sample clamp and can not be used in the difficult problem in the autoclave.
Technical scheme of the present invention is following:
A kind of high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps; These anchor clamps are provided with column, platform, upper pressing cap, lower pressing cap, adapter; These anchor clamps are arranged in the autoclave; The kettle cover of autoclave is following, and the threaded one end of column is connected in the threaded hole of autoclave kettle cover, and the position that column is connected with autoclave is through lower locking nut locking; The platform circumference has leghole, and the center, lower surface of platform has the platform groove, and the lower surface circumference of platform has the platform threaded hole; The other end of column is threaded onto platform through the leghole on the platform, and difference mounting platform Upper gasket and platform lower gasket are installed set nut respectively in the place, upper and lower end face of platform on each column on column, and upper locking nut compresses the platform Upper gasket;
The center, lower surface of adapter has adapter lower end snail pit, and adapter lower end snail pit connects the tensile axis of fatigue machine; The center, upper surface of adapter has the adapter groove, and the upper surface circumference of adapter has adapter upper end snail pit, and the lower convex platform of laboratory sample is placed in the adapter groove, and lower convex platform and adapter groove are for closely cooperating;
Split semi-ring for two and be pressed in laboratory sample lower convex platform upper surface; Lower pressing cap is enclosed within to be split on the semi-ring; The lower pressing cap center is offered with the said semi-ring of splitting and is split the semi-ring hole accordingly, and the lower pressing cap circumference has the corresponding pressure cap bolt hole of adapter upper end snail pit with adapter upper surface circumference, and the semi-ring hole of splitting of lower pressing cap is pressed in and splits on the semi-ring boss; The lower pressing cap pad is placed in said pressure cap bolt hole upper surface, and the lower pressing cap bolt passes the lower pressing cap pad, lower pressing cap is connected with adapter;
Other establishes two and splits the convex platform lower surface that semi-ring is pressed in laboratory sample; The upper pressing cap center is offered with the said semi-ring of splitting and is split the semi-ring hole accordingly; The upper pressing cap circumference has and the corresponding pressure cap bolt hole of the platform threaded hole of platform lower surface circumference; The semi-ring hole of splitting of upper pressing cap is pressed in and splits on the semi-ring boss, and the upper pressing cap pad is placed in said pressure cap bolt hole lower surface, and the upper pressing cap bolt passes the upper pressing cap pad, upper pressing cap is connected with platform.
Described high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps, that the material of this anchor clamps each several part is is corrosion-resistant, elevated temperature strength 316 austenitic stainless steels preferably.
Described high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps, column lower end has groove milling near the screw thread mouth place.
Described high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps, the diameter of platform groove is greater than the diameter of adapter groove.
Described high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps, splitting the semi-ring bent angle has smooth circular arc, splits the height of the height of semi-ring greater than upper pressing cap or lower pressing cap.
Described high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps, described upper pressing cap bolt or lower pressing cap bolt are hexagon socket head cap screw.
The method of application of described high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps comprises the steps:
(1) threaded one end of column is screwed in the threaded hole of autoclave kettle cover, and the position that each column is connected with autoclave is through lower locking nut locking, and the other end of column is threaded onto platform through the leghole on the platform; Before column is put leghole into; On column, respectively overlap a platform lower gasket,, above column, respectively put a platform Upper gasket again with level meter leveling platform; Install set nut on each column respectively, upper locking nut compresses the platform Upper gasket; Adjust upper locking nut, lower locking nut repeatedly, guarantee the platform level, stablize and do not rock;
(2) adapter lower end snail pit connects the tensile axis of fatigue machine, and the lower convex platform of laboratory sample is placed in the adapter groove, rotates sample, makes nature vertical, relies on sample self gravitation centering; Split semi-ring to two again and be pressed in laboratory sample lower convex platform upper surface, rotate and to split semi-ring, make and split semi-ring and be adjacent to sample; Be enclosed within lower pressing cap then and split on the semi-ring; Make the semi-ring hole of splitting on the lower pressing cap just be pressed in and split on the semi-ring boss down; Rotate lower pressing cap, make the pressure cap bolt hole just with adapter on adapter upper end snail pit identical relatively, lower pressing cap pad is placed in each pressure cap bolt hole upper surface; The lower pressing cap bolt passes the lower pressing cap pad, lower pressing cap is connected with adapter; Lower pressing cap is screwed on the adapter upper end snail pit, observes the slit between lower pressing cap and the adapter, laboratory sample lower convex platform and adapter groove are fitted like a glove compress;
(3) split the convex platform lower surface that semi-ring is pressed in laboratory sample to two other; The semi-ring hole of splitting of upper pressing cap is pressed in and splits on the semi-ring boss; With hand steered tight; The pressure cap pad is put in each pressure cap bolt hole lower surface, and the upper pressing cap bolt passes the upper pressing cap pad, upper pressing cap is connected with the platform threaded hole of platform lower surface; Tensile axis then moves up; The drive laboratory sample rises; Make the sample convex platform just get into the platform groove of center, platform lower surface, rotate upper pressing cap after the centering, make the pressure cap bolt hole just with the platform threaded hole to last; Tighten the upper pressing cap bolt, make the laboratory sample upper surface compress the platform groove top of center, platform lower surface fully;
(4) open the fatigue machine switch board, the adjustment tensile axis makes laboratory sample receive compressive stress, guarantees that the upper and lower end face of laboratory sample and platform groove, adapter bottom portion of groove fully compress;
(5) tighten the lower pressing cap bolt earlier with spanner, tighten, tighten the upper pressing cap bolt at last, equally corner bolt is tightened, carry out high-temperature high pressure water corrosion fatigue experiment by order to corner bolt.
The method of application of described high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps, for the first time before the fatigue experiment, the cancellation thread pitch, method of operating is following:
(1), be contained in laboratory sample on the anchor clamps, tighten the lower pressing cap bolt on the lower pressing cap earlier, tighten the upper pressing cap bolt on the upper pressing cap then;
(2), open fatigue machine, to laboratory sample loading tensile 40～50KN, fully draw back the gap on the draw direction;
(3), clamp column, tighten the lower locking nut below the column, tighten the upper locking nut on the platform then, the gap on the cancellation draw direction with spanner;
(4), to test specimen on-load pressure 40～50KN, fully draw back the gap on the compression direction;
(5), clamp column, tighten the upper locking nut on the platform, tighten the lower locking nut under the column then, the gap on the cancellation compression direction with spanner;
(6), the operation fatigue machine, ten cycles that circulates are observed the smooth nothing bending of waveform, thread pitch is eliminated, if platform appearance, repeating step (2)-(6), the complete cancellation up to the gap are arranged on the waveform.
The invention has the beneficial effects as follows:
1, high-temperature high pressure water corrosion fatigue anchor clamps of the present invention are done material with 316 austenitic stainless steels, the high temperature high voltage resistant aqueous corrosion, and intensity is good, can guarantee the anchor clamps long-time running.
2, adapter groove diameter of the present invention is less than the platform groove, and adapter connects tensile axis, tighten lower pressing cap after, be benchmark with adapter groove and tensile axis, the platform groove that aligns, the tensile axis that has guaranteed sample and imposed load is to neutrality.
3, lower locking nut cancellation of the present invention the gap of column and kettle cover screw thread, the upper locking nut cancellation gap of column and platform screw thread.
4, the design of the pressure cap cover semi-ring that adopts of the present invention makes the laboratory sample clamping very tight, no gap, and the fatigue experiment of suitable various load ratios is-1 symmetrical drawingand pressing fatigue like load ratio, load ratio is 0 the fatigue of drawing.
5, screw bolt and nut pad of the present invention has protected in the process of tightening platform and pressure cap injury-free.
6, the present invention is simple in structure, installation and removal are easy, with low cost, easy to operate.
7, fatigue machine sample clamp of the present invention can be used for autoclave, has solved big, bad to the neutrality problem of existing sample clamp non-refractory water under high pressure burn into thread gaps.
Description of drawings
Fig. 1 is the whole cut-open view of anchor clamps of the present invention.
Fig. 2 is a jig platform upward view of the present invention.
Fig. 3 is the structural representation of anchor clamps adapter of the present invention.Wherein, (a) figure is a vertical view; (b) figure is a sectional view.
Fig. 4 is the structural representation of anchor clamps upper pressing cap of the present invention (or lower pressing cap).Wherein, (a) figure is a vertical view; (b) figure is sectional view (lower pressing cap is identical with the upper pressing cap structure, is symmetrical set).
Fig. 5 is that homemade SA508-3 low alloy steel high-temperature high pressure water corrosion fatigue experiment peak stress scope is with circulation cycle change curve.
Load and displacement oscillogram in time when Fig. 6 is the 100th circulation cycle.
Fig. 7 is the stress-strain circle of different circulation cycles.
Among Fig. 1 to Fig. 4, the 1-upper locking nut; 2-platform Upper gasket; The 3-platform; 4-platform lower gasket; The 5-upper pressing cap; The 6-column; 7-upper pressing cap bolt; The 8-laboratory sample; 9-splits semi-ring; 10-lower pressing cap pad; 11-lower pressing cap bolt; The 12-lower pressing cap; The 13-adapter; The 14-lower locking nut; The 15-autoclave; The 16-tensile axis; The 17-leghole; 18-platform groove; 19-platform threaded hole; 20-adapter upper end snail pit; 21-adapter lower end snail pit; 22-adapter groove; 23-pressure cap bolt hole; 24-splits the semi-ring hole; 25 upper pressing cap pads; 26 convex platforms; 27 lower convex platforms; 28 circular arcs.
Embodiment
Shown in Fig. 1-4; The present invention can be arranged in the autoclave 15 by the sample clamp of test material Corrosion Fatigue Properties under the HTHP water environment; The kettle cover of autoclave 15 is following; These anchor clamps by eight upper locking nuts 1, four platforms Upper gasket 2, platform 3, four platforms lower gasket 4, upper pressing cap 5, four columns 6, six upper pressing cap bolts 7, four split semi-ring 9, six lower pressing cap pads 10, six lower pressing cap bolts 11, lower pressing cap 12, adapter 13, four lower locking nuts 14, six upper pressing cap pads 25 etc. and form, each several part connects as follows:
Among the present invention, column 6 lower ends can have a groove milling near the screw thread mouth place.
In order to increase the lifting surface area of column 6; Before column 6 is put leghole 17 into, on column 6, respectively overlap a platform lower gasket 4, with level meter leveling platform 3; And then above column 6, respectively put a platform Upper gasket 2; Purpose is for fear of the time wearing and tearing platform that tights a bolt, and installs set nut 1 respectively on each column 6, and upper locking nut 1 compresses platform Upper gasket 2; For this thread pitch of cancellation, need a upper locking nut is installed respectively on each column 6 again, compress upper locking nut 1, adjust upper locking nut 1, lower locking nut 14 repeatedly, guarantee the platform level, stablize and do not rock.
The center, lower surface of adapter 13 has adapter lower end snail pit 21, and adapter lower end snail pit 21 connects the tensile axis 16 of fatigue machine; The center, upper surface of adapter 13 has adapter groove 22; The upper surface circumference of adapter 13 has adapter upper end snail pit 20, and the lower convex platform 27 of laboratory sample 8 is placed in the adapter groove 22, and lower convex platform 27 is closely cooperate (like Fig. 3) with adapter groove 22; Rotate sample a little; Make nature vertical, so just rely on sample self gravitation centering, split semi-ring 9 to two then and be pressed in laboratory sample lower convex platform 27 upper surfaces; Lower pressing cap 12 centers are offered with the said semi-ring 9 of splitting and are split semi-ring hole 24 accordingly, and lower pressing cap 12 circumference have the adapter upper end snail pit 20 corresponding pressure cap bolts hole 23 with adapter upper surface circumference.Owing to split the bent angle of semi-ring one smooth excessive circular arc 28 is arranged; Rotate a little and split semi-ring, just can well be adjacent to sample, be enclosed within lower pressing cap 12 then and split on the semi-ring 9; Make the semi-ring hole 24 of splitting on the lower pressing cap 12 just be pressed in and split on semi-ring 9 boss (like Fig. 4) down; Rotate lower pressing cap 12, make its six pressure cap bolts hole 23 just with adapter 13 on adapter upper end snail pit 20 identical relatively, lower pressing cap pad 10 is placed in each pressure cap bolt hole 23 upper surface; Lower pressing cap bolt 11 passes lower pressing cap pad 10, lower pressing cap 12 is connected with adapter 13; Lower pressing cap 12 is screwed on the adapter upper end snail pit 20, observes the slit between lower pressing cap 12 and the adapter 13, laboratory sample lower convex platform 27 and adapter groove 22 are fitted like a glove compress.
Split convex platform 26 lower surfaces that semi-ring 9 is pressed in laboratory sample 8 to two other, upper pressing cap 5 centers are offered with the said semi-ring 9 of splitting and are split semi-ring hole 24 accordingly, and upper pressing cap 5 circumference have the platform threaded hole 19 corresponding pressure cap bolts hole 23 with platform 3 lower surface circumference; The semi-ring hole 24 of splitting of upper pressing cap 5 is pressed in and splits on semi-ring 9 boss, and with hand steered tight, pressure cap pad 25 is put in each pressure cap bolt hole 23 lower surface; Upper pressing cap bolt 7 passes upper pressing cap pad 25, upper pressing cap 5 is connected with the platform threaded hole 19 of platform 3 lower surfaces, and the tensile axis 16 that moves up then drives laboratory sample 8 and rises; Make sample convex platform 26 just get into the platform groove 18 of center, platform 3 lower surface, the diameter of platform groove 18 is greater than the diameter of adapter groove 22, promptly greater than sample convex platform 26 diameters; Being easy to adapter groove 22 like this is benchmark alignment stage groove 18, guaranteed sample to neutrality, even tensile axis 16 off center a little; Can be benchmark centering also, make loading direction identical, guarantee neutrality to greatest extent with the sample direction with the tensile axis; Rotate upper pressing cap 5 after the centering, make six pressure cap bolts hole 23 just with 19 pairs of platform threaded holes on, tighten upper pressing cap bolt 7; Make laboratory sample 8 upper surfaces compress platform groove 18 tops of center, platform 3 lower surface fully; Open the fatigue machine switch board, adjustment tensile axis 16 makes laboratory sample 8 receive certain compressive stress; Guaranteed that so upper and lower end face of laboratory sample and platform groove 18, adapter groove 22 bottoms fully compress; Tighten lower pressing cap bolt 11 earlier with allen key then, tighten, tighten upper pressing cap bolt 7 at last by order to corner bolt; Equally corner bolt is tightened, laboratory sample 8 is reduced to minimum with platform groove 18, adapter groove 22 gaps like this.
Among the present invention, split the height of the height of semi-ring 9 greater than upper pressing cap 5 or lower pressing cap 12.
Because inevitably there is the gap in the screw thread inherent feature with being threaded, the fatigue experiment under the shift mode control on the throne must be considered the influence in gap, and is more accurate for experimental data, must reduce thread pitch as much as possible.The present invention fully takes into account this point in design, before testing for the first time, and the cancellation thread pitch, method of operating is following:
(1), be contained in laboratory sample 8 on the anchor clamps, tighten six lower pressing cap bolts 11 on the lower pressing cap 12 earlier, tighten six upper pressing cap bolts 7 on the upper pressing cap 5 then.
(2), open fatigue machine, laboratory sample 8 is loaded maximum pulling force 40～50KN, fully draw back the gap on the draw direction.
(3), clamp the groove milling on the column 6, tighten the lower locking nut 14 below the column 6, tighten the upper locking nut 1 on the platform 3 then, the gap on the cancellation draw direction with spanner.
(4), test specimen 8 is loaded maximum pressure 40～50KN, fully draw back the gap on the compression direction.
(5), clamp the groove milling on the column 6, tighten the upper locking nut 1 on the platform 3, tighten the lower locking nut 14 under the column 6 then, the gap on the cancellation compression direction with spanner.
(6), the operation fatigue machine, ten cycles that circulates are observed the smooth nothing bending of waveform that fatigue machine shows, thread pitch is eliminated, if platform appearance, repeating step (2)-(6), the complete cancellation up to the gap are arranged on the waveform.
Embodiment
Homemade pressure vessel dissolves the corrosion fatigue experiment in the oxygen-saturated HTHP recirculated water with SA508-3 low alloy steel at 300 ℃, 10MPa, DO, and the strain amplitude is 2.5%.
The laboratory sample material is that a kind of homemade nuclear plant pressure vessels is used SA508-3 low alloy steel, is processed into smooth pole sample, and gauge length is 16mm, and diameter is 8mm; Be fixed on fatigue samples on the anchor clamps, behind the cancellation gap, begin experiment then, experiment condition is set: 300 ℃ of temperature in the kettle; Pressure is 10MPa, saturated dissolved oxygen, conductivity＜0.1 μ S/cm; The fatigue machine control model is displacement control, and waveform is a triangular wave, and strain rate is 0.001s
-1, the strain amplitude is made as 2.5%, boundary condition be made as when peak stress drop to the maximum stable stress value 75% the time stop the experiment, the cycle index N that it is corresponding
25Be defined as fatigue lifetime.When the circulation cycle reached 352 cycles, experiment stopped.
Fig. 5 is the peak stress amplitude and the circulation cycle curve of experimental record, and be 352 cycles fatigue lifetime, and as can beappreciated from fig. 5, the curve smoother is tested more successful.Load and the time dependent oscillogram of displacement can find out that triangular waveform is more intact when Fig. 6 was the 100th circulation cycle, and smooth no platform of load waveform and bending explain that the anchor clamps gap is very little, can ignore, and the displacement waveform symmetry of control is fine.Fig. 7 is the stress-strain circle of different circulation cycles, can find out, stress-strain circle is very big, and tangible plastic yield appears in interpret sample; The stress-strain circle smoother explains that anchor clamps do not have the gap; Stress-strain circle size no change explains that the anchor clamps gap does not relax along with the carrying out of experiment, and anchor clamps stability is fine.
The present invention can be used in the autoclave, carries out various fatigue experiments under the HTHP solution environmental, corrosion-resistant, be prone to centering, the gap is little, precision is high, simple in structure, installation and removal are easy, with low cost.This sample clamp is safe and reliable, high temperature high voltage resistant aqueous corrosion, thread pitch are little, good to neutrality, working service is convenient, can satisfy requirement of experiment well.
Claims (8)
1. high-temperature high pressure water corrosion fatigue laboratory sample anchor clamps; It is characterized in that: these anchor clamps are provided with column, platform, upper pressing cap, lower pressing cap, adapter; These anchor clamps are arranged in the autoclave; The kettle cover of autoclave is following, and the threaded one end of column is connected in the threaded hole of autoclave kettle cover, and the position that column is connected with autoclave is through lower locking nut locking; The platform circumference has leghole, and the center, lower surface of platform has the platform groove, and the lower surface circumference of platform has the platform threaded hole; The other end of column is threaded onto platform through the leghole on the platform, and difference mounting platform Upper gasket and platform lower gasket are installed set nut respectively in the place, upper and lower end face of platform on each column on column, and upper locking nut compresses the platform Upper gasket;
The center, lower surface of adapter has adapter lower end snail pit, and adapter lower end snail pit connects the tensile axis of fatigue machine; The center, upper surface of adapter has the adapter groove, and the upper surface circumference of adapter has adapter upper end snail pit, and the lower convex platform of laboratory sample is placed in the adapter groove, and lower convex platform and adapter groove are for closely cooperating;
Split semi-ring for two and be pressed in laboratory sample lower convex platform upper surface; Lower pressing cap is enclosed within to be split on the semi-ring; The lower pressing cap center is offered with the said semi-ring of splitting and is split the semi-ring hole accordingly, and the lower pressing cap circumference has the corresponding pressure cap bolt hole of adapter upper end snail pit with adapter upper surface circumference, and the semi-ring hole of splitting of lower pressing cap is pressed in and splits on the semi-ring boss; The lower pressing cap pad is placed in said pressure cap bolt hole upper surface, and the lower pressing cap bolt passes the lower pressing cap pad, lower pressing cap is connected with adapter;
Other establishes two and splits the convex platform lower surface that semi-ring is pressed in laboratory sample; The upper pressing cap center is offered with the said semi-ring of splitting and is split the semi-ring hole accordingly; The upper pressing cap circumference has and the corresponding pressure cap bolt hole of the platform threaded hole of platform lower surface circumference; The semi-ring hole of splitting of upper pressing cap is pressed in and splits on the semi-ring boss, and the upper pressing cap pad is placed in said pressure cap bolt hole lower surface, and the upper pressing cap bolt passes the upper pressing cap pad, upper pressing cap is connected with platform.
2. according to the described high-temperature high pressure water corrosion fatigue of claim 1 laboratory sample anchor clamps, it is characterized in that: the material of this anchor clamps each several part is corrosion-resistant, elevated temperature strength 316 austenitic stainless steels preferably.
3. according to the described high-temperature high pressure water corrosion fatigue of claim 1 laboratory sample anchor clamps, it is characterized in that: column lower end has groove milling near the screw thread mouth place.
4. according to the described high-temperature high pressure water corrosion fatigue of claim 1 laboratory sample anchor clamps, it is characterized in that: the diameter of platform groove is greater than the diameter of adapter groove.
5. according to the described high-temperature high pressure water corrosion fatigue of claim 1 laboratory sample anchor clamps, it is characterized in that: splitting the semi-ring bent angle has smooth circular arc, splits the height of the height of semi-ring greater than upper pressing cap or lower pressing cap.
6. according to the described high-temperature high pressure water corrosion fatigue of claim 1 laboratory sample anchor clamps, it is characterized in that: described upper pressing cap bolt or lower pressing cap bolt are hexagon socket head cap screw.
7. according to the method for application of the described high-temperature high pressure water corrosion fatigue of claim 1 laboratory sample anchor clamps, it is characterized in that:
(1) threaded one end of column is screwed in the threaded hole of autoclave kettle cover, and the position that each column is connected with autoclave is through lower locking nut locking, and the other end of column is threaded onto platform through the leghole on the platform; Before column is put leghole into; On column, respectively overlap a platform lower gasket,, above column, respectively put a platform Upper gasket again with level meter leveling platform; Install set nut on each column respectively, upper locking nut compresses the platform Upper gasket; Adjust upper locking nut, lower locking nut repeatedly, guarantee the platform level, stablize and do not rock;
(2) adapter lower end snail pit connects the tensile axis of fatigue machine, and the lower convex platform of laboratory sample is placed in the adapter groove, rotates sample, makes nature vertical, relies on sample self gravitation centering; Split semi-ring to two again and be pressed in laboratory sample lower convex platform upper surface, rotate and to split semi-ring, make and split semi-ring and be adjacent to sample; Be enclosed within lower pressing cap then and split on the semi-ring; Make the semi-ring hole of splitting on the lower pressing cap just be pressed in and split on the semi-ring boss down; Rotate lower pressing cap, make the pressure cap bolt hole just with adapter on adapter upper end snail pit identical relatively, lower pressing cap pad is placed in each pressure cap bolt hole upper surface; The lower pressing cap bolt passes the lower pressing cap pad, lower pressing cap is connected with adapter; Lower pressing cap is screwed on the adapter upper end snail pit, observes the slit between lower pressing cap and the adapter, laboratory sample lower convex platform and adapter groove are fitted like a glove compress;
(3) split the convex platform lower surface that semi-ring is pressed in laboratory sample to two other; The semi-ring hole of splitting of upper pressing cap is pressed in and splits on the semi-ring boss; With hand steered tight; The pressure cap pad is put in each pressure cap bolt hole lower surface, and the upper pressing cap bolt passes the upper pressing cap pad, upper pressing cap is connected with the platform threaded hole of platform lower surface; Tensile axis then moves up; The drive laboratory sample rises; Make the sample convex platform just get into the platform groove of center, platform lower surface, rotate upper pressing cap after the centering, make the pressure cap bolt hole just with the platform threaded hole to last; Tighten the upper pressing cap bolt, make the laboratory sample upper surface compress the platform groove top of center, platform lower surface fully;
(4) open the fatigue machine switch board, the adjustment tensile axis makes laboratory sample receive compressive stress, guarantees that the upper and lower end face of laboratory sample and platform groove, adapter bottom portion of groove fully compress;
(5) tighten the lower pressing cap bolt earlier with spanner, tighten, tighten the upper pressing cap bolt at last, equally corner bolt is tightened, carry out high-temperature high pressure water corrosion fatigue experiment by order to corner bolt.
8. according to the method for application of the described high-temperature high pressure water corrosion fatigue of claim 7 laboratory sample anchor clamps, it is characterized in that, for the first time before the fatigue experiment, the cancellation thread pitch, method of operating is following:
(1), be contained in laboratory sample on the anchor clamps, tighten the lower pressing cap bolt on the lower pressing cap earlier, tighten the upper pressing cap bolt on the upper pressing cap then;
(2), open fatigue machine, to laboratory sample loading tensile 40～50KN, fully draw back the gap on the draw direction;
(3), clamp column, tighten the lower locking nut below the column, tighten the upper locking nut on the platform then, the gap on the cancellation draw direction with spanner;
(4), to test specimen on-load pressure 40～50KN, fully draw back the gap on the compression direction;
(5), clamp column, tighten the upper locking nut on the platform, tighten the lower locking nut under the column then, the gap on the cancellation compression direction with spanner;
(6), the operation fatigue machine, ten cycles that circulates are observed the smooth nothing bending of waveform, thread pitch is eliminated, if platform appearance, repeating step (2)-(6), the complete cancellation up to the gap are arranged on the waveform.
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| CN 201010240911 CN102346113B (en) | 2010-07-30 | 2010-07-30 | Fatigue test sample clamp with high temperature resistance, high pressure resistance and aqueous corrosion resistance and usage method thereof |
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| CN 201010240911 CN102346113B (en) | 2010-07-30 | 2010-07-30 | Fatigue test sample clamp with high temperature resistance, high pressure resistance and aqueous corrosion resistance and usage method thereof |
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| CN103454165A (en) * | 2013-08-19 | 2013-12-18 | 北京航空航天大学 | Testing system for fatigue crack propagation test under high/low temperature environment |
| CN103499502A (en) * | 2013-09-28 | 2014-01-08 | 中国科学院金属研究所 | Slow stretching experimental device with high-temperature high-pressure circulating water and using method |
| CN103557784A (en) * | 2013-11-07 | 2014-02-05 | 中国科学院金属研究所 | Normal position real-time monitoring system for high-temperature and high-pressure water fatigue testing specimen scale distance section strain |
| CN104411422A (en) * | 2012-05-14 | 2015-03-11 | 丹尼尔和科菲森梅克尼齐有限公司 | Movable head for a stretching machine |
| CN104422648A (en) * | 2013-08-30 | 2015-03-18 | 宝山钢铁股份有限公司 | Oil well pipe material deposition sulfur corrosion test method and fixture for sulfur corrosion test |
| CN104677722A (en) * | 2013-11-30 | 2015-06-03 | 中国科学院金属研究所 | High-temperature high-pressure kettle loading device |
| CN104807711A (en) * | 2015-04-21 | 2015-07-29 | 中信重工机械股份有限公司 | Corrosion fatigue test device |
| CN108572108A (en) * | 2012-08-08 | 2018-09-25 | Mts***公司 | Test specimen retainer for hot environment |
| CN109342182A (en) * | 2018-09-19 | 2019-02-15 | 中国航发北京航空材料研究院 | A kind of step sample fatigue test clamper |
| CN109443921A (en) * | 2018-12-03 | 2019-03-08 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Environment-pulling force coupling test device and system |
| CN109490109A (en) * | 2018-02-06 | 2019-03-19 | 中国科学院金属研究所 | A kind of tubulose sample high-temperature high pressure water corrosion fatigue test apparatus |
| CN110823710A (en) * | 2019-11-22 | 2020-02-21 | 江苏大学 | Ultrahigh pressure environment material internal information in-situ measurement device |
| CN111289380A (en) * | 2020-04-03 | 2020-06-16 | 西安交通大学 | Loading device for stress corrosion crack initiation and propagation experiment |
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| CN108572108A (en) * | 2012-08-08 | 2018-09-25 | Mts***公司 | Test specimen retainer for hot environment |
| CN103364333A (en) * | 2013-07-12 | 2013-10-23 | 中国核动力研究设计院 | Fixture used for corrosion performance tests of nuclear fuel and materials and application method thereof |
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| CN103454165B (en) * | 2013-08-19 | 2016-08-10 | 北京航空航天大学 | A kind of fatigue crack propagation test test system under high/low temperature environment |
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| CN103499502A (en) * | 2013-09-28 | 2014-01-08 | 中国科学院金属研究所 | Slow stretching experimental device with high-temperature high-pressure circulating water and using method |
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| CN103557784A (en) * | 2013-11-07 | 2014-02-05 | 中国科学院金属研究所 | Normal position real-time monitoring system for high-temperature and high-pressure water fatigue testing specimen scale distance section strain |
| CN104677722A (en) * | 2013-11-30 | 2015-06-03 | 中国科学院金属研究所 | High-temperature high-pressure kettle loading device |
| CN104677722B (en) * | 2013-11-30 | 2017-08-25 | 中国科学院金属研究所 | A kind of high temperature and high pressure kettle loading device |
| CN104807711A (en) * | 2015-04-21 | 2015-07-29 | 中信重工机械股份有限公司 | Corrosion fatigue test device |
| CN108458926B (en) * | 2018-01-30 | 2021-01-05 | 东南大学 | Thermal rigid single-shaft loading device |
| CN109490109A (en) * | 2018-02-06 | 2019-03-19 | 中国科学院金属研究所 | A kind of tubulose sample high-temperature high pressure water corrosion fatigue test apparatus |
| CN109490109B (en) * | 2018-02-06 | 2021-07-23 | 中国科学院金属研究所 | High-temperature and high-pressure water corrosion fatigue test device for tubular sample |
| CN109342182A (en) * | 2018-09-19 | 2019-02-15 | 中国航发北京航空材料研究院 | A kind of step sample fatigue test clamper |
| CN109443921A (en) * | 2018-12-03 | 2019-03-08 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Environment-pulling force coupling test device and system |
| CN109443921B (en) * | 2018-12-03 | 2024-05-28 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Environment-tensile coupling test device and system |
| CN110823710A (en) * | 2019-11-22 | 2020-02-21 | 江苏大学 | Ultrahigh pressure environment material internal information in-situ measurement device |
| CN111289380A (en) * | 2020-04-03 | 2020-06-16 | 西安交通大学 | Loading device for stress corrosion crack initiation and propagation experiment |
| CN111289380B (en) * | 2020-04-03 | 2021-11-19 | 西安交通大学 | Loading device for stress corrosion crack initiation and propagation experiment |
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