CN110082089A - Bunch tube recycles zero-bit measuring system and investigating method under elastoplasticity thermal stress - Google Patents
Bunch tube recycles zero-bit measuring system and investigating method under elastoplasticity thermal stress Download PDFInfo
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- CN110082089A CN110082089A CN201910434096.5A CN201910434096A CN110082089A CN 110082089 A CN110082089 A CN 110082089A CN 201910434096 A CN201910434096 A CN 201910434096A CN 110082089 A CN110082089 A CN 110082089A
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- 230000006698 induction Effects 0.000 claims description 62
- 238000002474 experimental method Methods 0.000 claims description 17
- 230000005484 gravity Effects 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 13
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- 239000010425 asbestos Substances 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- 229910052895 riebeckite Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- 239000004568 cement Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005382 thermal cycling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
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- 230000001351 cycling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/002—Thermal testing
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Abstract
It is recycled the invention discloses a kind of bunch tube and keeps zero-bit measuring system and investigating method under elastoplasticity thermal stress, the measuring device includes a pair of upper rigidity right angle frame and lower rigidity right angle frame, measuring part, the vertical edge of the pair of upper rigidity right angle frame and lower rigidity right angle frame is symmetrically arranged at the upper and lower bunch tube two sides of bunch tube displacement measurement section, horizontal edge is respectively symmetrically equipped with the upper and lower positioning device of installation measuring part, and two sides measuring part is vertical parallel with intermediate casing displacement shift measurement section between upper and lower positioning device.It shrinks and expands caused by resisting the thermal stress variation of bunch tube the medicine have the advantages that loading system can load in time, make to can be controlled under 0 ± 0.01in zero shift under the Duan Shi thermal cycle of bunch tube Bit andits control.
Description
Technical field
The present invention relates to one kind, and homogeneous tube bunch tube to be made to keep the height of 0 ± 0.01in zero shift in the case where recycling elastoplasticity thermal stress
Accuracy Displacement measure and control device and method.Under Canadian block SAGD and CSS hole condition, the Premium connection bunch tube of sealing will be undergone
Room temperature is recycled to 290 DEG C of ten elastoplasticity thermal stress.Under this hole condition, stress relaxation can occur for bunch tube.In order to evaluate the well
Whether Premium connection leaks under condition, and whether bunch tube fails, and invention this method.
Background technique
In recent years, international petroleum Gas Industry environment hole condition is increasingly sophisticated, mentions to tubing and casing used and Premium connection
More harsh requirement is gone out, wherein special buckle of oil casing connector is the important link of high-intensitive high sealing performance.Canadian block
SAGD and CSS well is especially harsh, and bunch tube is other than bearing generally existing elastic Tensile or Compressive Loading and inside/outside pressure composite force, also
Bear more harsh circulating plastic thermal stress.
General hole condition, 180 DEG C or less can produce petroleum.But under the hole condition, petroleum is super-viscous oil, need to be through high-temperature steam
Driving could acquire out.Being cycling in and out for high-temperature steam makes the temperature of down-hole casing string from room temperature to 290 DEG C of circulation changes, this
The thermal cycle highest of sample will be undergone 10 times.Bunch tube can be expanded and be shunk under free state in the case where heating cooling effect.But
Cement is by bunch tube sealing under this hole condition, make bunch tube can not Free Transform, thus since heating is cooling in casing string material
Portion generates stretching and compression stress, and plastic stress relaxation occurs in high temperature and low temperature point.When plastic deformation or relaxation occurs,
The failures such as tube body fracture, Premium connection leakage, screw thread fracture may occur for bunch tube.Once any one failure feelings occurs
Condition will cause huge economic losses to Petroleum Production, or even cause seriously to pollute to environment.Therefore Premium connection set is being used
Before pipe string, it is necessary in laboratory, be tested using use limits in kind, test homogeneous tube resists the ability of the hole condition service condition.
For this military service operating condition of analog casing string, laboratory uses the load simulated bunch tube of Bit andits control by cement in advance
Sealing.Simulation spraying steam process is heated to bunch tube using heating equipment.Bunch tube is loaded using experiment load frame.It is logical
Overcompression or tensile load make the length of bunch tube remain that zero shift is constant in Thermal Cycling.
According to various actual conditions, 11 well-known oil plays in the world are together with international petroleum standard authoring mechanism, to each area
Block hole condition is unified, and has write the dedicated qualification standard of thermal production well sleeve connector (12835 standard TWCCEP of ISO/PAS).
Provide that zero shift control precision is determined in 0 ± 0.01in or 0 ± 0.254mm.The precision tests homogeneous tube use limits
It is superelevation requirement, can matches in excellence or beauty with mechanics of materials small sample.It is pre-pass to search document both domestic and external at present and visit similar experiment room,
It is resolved method.
By the search of the documents such as various papers, patent, relevant data report or the like is found not yet to solve
The problem.In many ways understood, the country there is no any department or unit that can complete as defined in ISO/PAS12835 standard (TWCCEP)
All pilot projects.Then it is researched and developed in oneself laboratory, has groped various heating, thermal insulation method, can not disappear
Except the influence to displacement sensor, the temperature that fuel factor will lead to displacement sensor reaches 50 to 60 degree, exceeds displacement sensor
Maximum temperature is born, displacement sensor accuracy decline is caused even to damage.More than ten kinds of displacement mounting devices are devised, can not be disappeared
Load caused by position drift is distorted when except drawing/pressure commutation.Loading system reaction rate can not track the variation of thermal stress in time.
Failed and summarized many times, has finally invented this method.
The present invention is aiming at the casing for being used to simulate SAGD and CSS hole condition in 12835 standard of ISO/PAS (TWCCEP)
The special method of zero-bit shift measurement control in string circulation elastoplasticity heat stress test.
Summary of the invention
For the technological gap of the current country, the first purpose of the invention is to provide a kind of bunch tube circulation elastoplasticity heat
Zero-bit measuring system is kept under stress；Second purpose, which is to provide under a kind of bunch tube circulation elastoplasticity thermal stress, keeps zero-bit
Investigating method is moved, to realize that measurement and control special buckle bunch tube keep the constant function of zero shift and energy under cyclic thermal stres
Power.
In order to achieve the above first purpose, the technical solution adopted by the present invention is that: a kind of bunch tube circulation elastoplasticity heat is answered
Zero-bit measuring system is kept under power, which includes a pair of above rigidity right angle frame and lower rigidity right angle frame, measuring part,
The vertical edge of the pair of upper rigidity right angle frame and lower rigidity right angle frame be symmetrically arranged at bunch tube displacement measurement section it is upper,
Setting of casing two sides, horizontal edge are respectively symmetrically equipped with the upper and lower positioning device of installation measuring part, and two sides measuring part is fixed above and below
It is parallel with bunch tube displacement measurement section between the device of position.
The measuring part includes without bullet gravity rope, magnetic induction displacement sensor female end, magnetic induction sensing rod, the measurement
Component is connected in upper positioning device without the one end for playing gravity rope, and other end bolt has the magnetic induction sensing rod, the magnetic strength
Inductive sensing stick is located in the inner hole of magnetic induction displacement sensor female end, moves freely, and the magnetic induction displacement sensor female end is solid
It is scheduled in the lower positioning device of the lower rigidity right angle frame, and magnetic induction sensing rod and magnetic induction displacement sensor female end are coaxial.
The upper positioning device is equipped with boss in right-angle side lateral surface, and the boss is equipped with connection without the M6 for playing gravity rope
Screw hole is fixed by screw, and adjustment gasket is equipped between M6 screw hole and screw；The lower positioning device includes being arranged at right angle
The card arc of side lateral surface, the M10 screw hole of card arc two sides, card arc are fixed by M10 screw.
The upper and lower rigidity right angle frame selects 35CrMo material.
The vertical edge of the upper and lower rigidity right angle frame and the verticality of horizontal edge are 0.1mm.
Rigidity right angle frame horizontal edge upper surface is equidistantly public under the two hole center distance of the lower rigidity right angle frame horizontal edge side screw hole
Difference is within the scope of ± 0.10mm.
The horizontal edge convex platform height of the upper rigidity right angle frame is displacement sensor female end outer radius -2mm.
The adjustment gasket is with a thickness of 0.05mm, 0.1mm, 0.5mm, 0.8mm or 1.0mm, for adjusting magnetic strength inductive sensing
Stick and magnetic induction displacement sensor female end are concentric.
To reach above-mentioned second purpose, another technical solution used in the present invention is: a kind of bunch tube circulation bullet modeling
Property thermal stress under keep zero shift investigating method, include the following steps:
Step 1: installation measuring device: bunch tube is recycled and keeps the installation of zero-bit measuring system under elastoplasticity thermal stress
On vertical loading experiment machine, vertical load frame, bunch tube, magnetic induction sensing rod gravity both perpendicular to ground；
Step 2: simulation heating: selecting electrical induction, with the equidistant screw arrangement heating sense of 200mm on bunch tube
Coil is answered, only occurs in magnetic field in bunch tube；
Step 3: measurement: TT&C system selects the multi-way contral circuit of 2.5KHz iterative rate and has unique control
The solemn lattice servo controller of technology of closed loop realizes smoothly loading without impact for Bit andits control load；
Step 4: data transmitting: in heating cooling procedure, displacement measurement section change in displacement, magnetic induction sensing rod is in magnetic strength
It answers and is moved in displacement sensor female end, variable signal is transmitted to solemn lattice servo controller, after computer software is collected into information,
Vertical loading experiment machine loads bunch tube, and bunch tube is made to remain zero shift.
Magnetic induction displacement sensor precision 0.01mm；Thermocouple is K-type welded type；It is 0.01mm vernier caliper with precision
The gap surrounding measured between magnetic induction sensing rod and magnetic induction sensor female end hole is impartial.
Effect of the invention is designed and produced using the investigating method for keeping zero shift under bunch tube thermoplasticity pulsating stress
Displacement measuring device selects high-precision magnetic induction displacement sensor, K-type welded type thermocouple, high speed iteration uniqueness to control closed loop
The solemn lattice controller of technology, has successfully completed the thermal cycle experiment of ISO 12835, reached the Canadian block SAGD well of simulation and
The purpose of CSS hole condition bunch tube military service situation.In ± 1 DEG C, loading system can be timely for temperature error control in Bit andits control section
Contraction caused by the thermal stress variation of bunch tube and expansion are resisted in load, are made under the Duan Shi thermal cycle of bunch tube Bit andits control
It can be controlled under 0 ± 0.01in zero shift.
Detailed description of the invention
Fig. 1 is displacement and temperature test schematic diagram in the present invention；
Fig. 2 is displacement measuring device schematic diagram of the present invention；
Fig. 3 is the schematic diagram of rigidity right angle frame in the present invention；
Fig. 4 is the schematic top plan view of Fig. 3；
Fig. 5 is the schematic diagram of rigidity right angle frame under the present invention；
Fig. 6 is the schematic top plan view of Fig. 5；
Fig. 7 is the schematic diagram that measuring device of the present invention is mounted on vertical loading experiment machine；
Fig. 8 is general assembly schematic diagram of the invention；
Fig. 9 is that displacement, temperature, load, internal pressure change over time curve in first circulation；
Figure 10 is that the 2-4 cyclic shift, temperature, load, internal pressure change over time curve；
Figure 11 is that the 6-10 cyclic shift, temperature, load, internal pressure change over time curve.
In figure:
1, special buckle box cupling 2, tube body 3, upper end plug
4, lower end plug 5, temperature measuring point 6, heat preservation asbestos cloth
7, heating induction coil 8, rigidity screw 9, upper rigidity right angle frame A
10, lower rigidity right angle frame A 11, upper rigidity right angle frame B 12, lower rigidity right angle frame B
13, without bullet gravity rope 14, magnetic induction displacement sensor female end 15, magnetic induction sensing rod
16, reinforcing rib 17, boss 18, M6 threaded hole
19, screw 20, adjustment gasket 21, adjusting nut are wound
22, M10 threaded hole 23, card arc 24, M10 screw
25, the planar end surface 26 of end plug, vertical loading experiment machine 27, spherical washer A
28, upper leading screw 29, feed screw nut 30, upper mounting plate
31, lower leading screw 35, lower leading screw nut 36, spherical washer C
37, spring washer 38, length adjustment nut 39, solemn lattice servo controller
40, computer 41, connection
Specific embodiment
Bunch tube of the invention is recycled in conjunction with attached drawing and keeps zero-bit measuring system and observing and controlling side under elastoplasticity thermal stress
Method is illustrated.
As shown in Figures 1 to 6, zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress, including rigid
Screw, upper rigidity right angle frame, measuring part, lower rigidity right angle frame, bunch tube displacement detecting and controlling section are spent, rigidity screw spots weld casing
At the displacement measurement endpoint in string list face, rigidity screw, that is, bunch tube displacement measurement endpoint, the upper rigidity right angle frame is located at casing
On rigidity screw at string displacement detecting and controlling section upper extreme point, lower rigidity right angle frame is located at rigid at bunch tube displacement measurement section lower extreme point
It spends on screw.The upper positioning device of the horizontal edge design installation measuring part of upper rigidity right angle frame, lower rigidity right angle frame design are lower fixed
Position device.For adjusting and fixation measuring component.Measuring part between upper and lower positioning device with bunch tube displacement detecting and controlling Duan Ping
Row；Upper and lower rigidity right angle frame selects 35CrMo material, and the horizontal sides of upper and lower rigidity right angle frame and the verticality of vertical edge are
0.1mm, the equidistant tolerance in rigidity right angle frame horizontal sides upper surface under the two hole center distance of the lower horizontal flank side surface screw hole of rigidity right angle frame
Within the scope of ± 0.10mm；17 height of horizontal sides convex platform of upper rigidity right angle frame is half outside magnetic induction displacement sensor female end
Diameter -2mm；Gasket 20 is adjusted with a thickness of 0.05mm, 0.1mm, 0.5mm, 0.8mm or 1.0mm, for adjusting magnetic induction sensing rod 15
It is concentric with magnetic induction displacement sensor female end 14.
Measuring part includes without bullet gravity rope 13, magnetic induction displacement sensor female end 14, magnetic induction sensing rod 15.Measurement portion
Part is connected in upper positioning device without the one end for playing gravity rope 13, other end bolt magnetic induction sensing rod 15, magnetic induction sensing rod
15 in 14 hole of magnetic induction displacement sensor female end, and magnetic induction displacement sensor female end 14 is fixed on the lower rigidity right angle frame
In lower positioning device, magnetic induction sensing rod 15 and magnetic induction displacement sensor female end 14 are coaxial.
Upper positioning device designs boss 17 in the horizontal sides lateral surface of upper rigidity right angle frame, and design connection is without bullet on boss 17
The M6 threaded hole of gravity rope 13 is fixed by winding screw, and design adjustment gasket and adjustment spiral shell between M6 screw hole and winding screw
It is female；Lower positioning device designs card arc 23, the M10 screw thread of the two sides of card arc 23 in the lateral surface of the horizontal sides of lower rigidity right angle frame
Hole, card arc 23 are fixed by M10 screw.
As shown in Figure 7, Figure 8, zero shift investigating method, including step are kept under a kind of bunch tube circulation elastoplasticity thermal stress
It is rapid:
1, bunch tube displacement detecting and controlling section endpoint is determined.The length of displacement detecting and controlling section is calculated according to 12835 standard requirements of ISO,
On the planar end surface 25 for leaning against end plug on one side with square, another side is leaned against on bunch tube, draws displacement measurement section endpoint, the i.e. side A
Two measurement terminals of (0 °), and draw the line between two o'clock.Index dial is placed in upper end plug 3, is drawn with the side A displacement measurement section
On the basis of line, turn 180 °, draw straight line in the side B, by the displacement measurement segment length of calculating, draws point, i.e. two measurements of the side B (180 °)
Endpoint.
2, spot welding rigidity screw.At four displacement measurement section endpoints of the two sides A, B that step 1 determines, spot welding rigidity spiral shell
Silk 8.When spot welding, the surface of tube body 2 is leaned against with square, observation rigidity screw 8 is vertical with 2 surface of bunch tube tube body.
3, insulation and temperature measurement device is installed.In 18 temperature measuring points 42 of 12835 standard requirements of ISO, spot welding K-type thermocouple,
Then entire bunch tube is wrapped up with heat preservation asbestos cloth 6.After installation as shown in Figure 5.
4, loading experiment machine is lifted up into.Spherical washer B32 is pierced into upper leading screw 28, upper silk by twist-on upper leading screw 28 in upper end plug 3
28 end twist-on hanging ring of thick stick.Flat shim 33 is put well on the lower platform 31 of vertical loading experiment machine 26.Hanging ring is hung with overhead traveling crane, it will
Ready bunch tube lifts up into vertical loading experiment machine, and upper leading screw 28 pierces into the hole of upper mounting plate 30, and separately lower end plug 4 is placed on plain cushion
On piece 33.
Twist-on lower leading screw 34 is connect with lower end plug 4, and spherical washer C36 pierces into lower leading screw 34, twist-on lower leading screw nut 35 to
Estimate the following table face contact of spherical washer C and lower platform 31.Manual descending upper mounting plate 30 is light to spherical washer B32 and upper mounting plate 30
Contact.Remove suspender belt, spherical washer A27 is pierced into upper leading screw 28, twist-on upper leading screw nut 29 is contacted to spherical washer A27.
5, bunch tube is adjusted.Add the surrender tensile load of 10% bunch tube, then plus 10% bunch tube yield pressure
Contracting load.Circulation unloads afterwards three times, again twist-on upper leading screw nut 29 and lower leading screw nut 35 to twist it is motionless until.
6, heater is installed.7 spiral of heating induction coil is equidistantly wound in outside heat preservation asbestos cloth 6, range includes two
Whole bunch tubes between end plug are equidistantly 200mm.
7, all components of displacement measuring device are installed.Gasket, upper rigidity right angle frame A, lower rigidity are worn on four rigidity screws 8
Two rigidity screws 8 of the side bunch tube A (0 °) are pierced into the vertical edge hole of right angle frame A respectively.Upper rigidity right angle B, lower rigidity right angle frame B
Vertical edge hole pierce into two rigidity screws 8 of the side bunch tube B (180 °) respectively.Shimming, is tightened with nut.Horizontal ruler is placed on
The horizontal edge upper surface of upper rigidity right angle frame A9, whether observation horizontal edge is horizontal, if unhorizontal, rigidity right angle frame A9 in adjustment, until
It is horizontal.Lower rigidity right angle frame A, upper rigidity right angle frame B, lower rigidity right angle frame B also use approach described above, adjustment horizontal edge to water
It is flat and fixed.
Winding screw 19 puts on adjustment gasket 20 and adjusting nut 21, is screwed into the M6 screw hole 18 of rigidity right angle frame A9.
Displacement sensor female end 14 is placed between two M10 threaded holes 22 of lower rigidity right angle frame A10 horizontal sides, is blocked with card arc 23,
Two M10 screws 24 are tightened, displacement sensor female end 14 is fixed vertically.Magnetic induction sensing rod is fastened without 13 one end of gravity rope is played
15, the other end is wrapped on winding screw 19, and magnetic induction sensing rod 15 is naturally drooped into the hole of displacement sensor female end 14.
With 0.01mm accuracy vernier caliper measure observation magnetic induction sensing rod and displacement sensor female end hole between gap whether surrounding
Equalization, such as unequal, replacement adjustment gasket 20, until above-mentioned gap surrounding is impartial.
Rigidity right angle frame and lower rigidity right angle frame on important component in displacement measuring device, using spot welding rigidity screw 8
Displacement measurement endpoint is constant during achieving the purpose that test on bunch tube tube body.It is surveyed using 8 non-resistance of magnetic induction sensor
The characteristic of displacement eliminates drift distortion when other displacement sensor tension and compression conversion.Utilize vertical load frame loading experiment machine
Magnetic induction is realized with object gravity both perpendicular to the characteristic on ground in 26 loading directions and bunch tube axis and displacement measurement direction
Sensing rod 15 moves freely in magnetic induction displacement sensor female end without any resistance.Using electrical induction, 200mm is equidistant
It arranges heating induction coil 7, only occurs in magnetic field in bunch tube.To enable TWCCEP thermal cycling test successfully to realize.
Displacement detecting and controlling system cannot reflect in time, heat and unevenly lead when solving displacement control thermal radiation, stretching/compressing load commutation
Problem, loading system can not resist the problems such as thermal stress changes in time repeatedly for the displacement of cause.After the completion of test, load and temperature are bent
Line meets operating condition, and zero shift is within the scope of 0 ± 0.254mm or 0 ± 0.01in.
By taking K55 grade of steel, Φ 244.48*8.94mm specification, special buckle TP-TW bunch tube as an example, illustrate specific embodiment.
After the connection for completing special buckle TP-TW bunch tube on screw-on machine, both ends are blocked with end plug.In the tube body of bunch tube
The parallel lines with bunch tube center line are drawn with square on the basis of end plug planar end surface 25 in 2 surfaces.It is special with bunch tube respectively
On the basis of the both sides of the face of snapping hoop 1, with vernier caliper measurement 534.30mm, point a little determines that displacement is surveyed on the line finished
Control two endpoints of section.Then index dial is placed on end plug, draws point in the other side of 180 degree.With the flush end of same end plug
The line parallel with bunch tube axis is drawn on the basis of face 25 on the 180 degree surface of bunch tube tube body 2.Vernier caliper measurement is used again
534.3mm puts a little on the line finished, determines two endpoints of the displacement detecting and controlling section on 180 ° of surfaces of bunch tube.So far
Two displacement detecting and controlling section determinations finish on 0 ° and 180 ° of surface on bunch tube.
On four displacement measurement endpoints that 8 points of rigidity screw of M20 are welded on the bunch tube of above-mentioned determination.When spot welding,
The surface of tube body 2 is leaned against with square, observation rigidity screw 8 is vertical with 2 surface of bunch tube tube body.Four rigidity screws 8 are
Displacement measurement endpoint.The method guarantee, displacement measurement be real bunch tube displacement.
In 18 positions of 12835 standard recommendation of ISO, spot welded type K shape thermocouple is installed.Then mineral wool heat insulating cloth 6 is used
Wrap up all bunch tubes between two end plugs.
Upper leading screw 28 is connect with upper end plug 3, spherical washer A27 is set in upper leading screw 28, is twisted in the end of upper leading screw 28
Connect hanging ring.The above ready bunch tube is attached on vertical loading experiment machine 26.When installation, enter vertical load in bunch tube
When in experimental machine 26, bunch tube is sling vertically, makes bunch tube free suspension.Then bunch tube is placed in vertical load at a slow speed
On the flat shim 25 of the lower platform 30 of experimental machine 26, slowly declines the upper mounting plate 30 of vertical loading experiment machine 26, make spherical washer
B32 is contacted with upper mounting plate 30 but no pressure.Spherical washer A27 is put on the upper mounting plate 30 of vertical loading experiment machine 26, it is pre- to twist
Feed screw nut 35 is connected to contact until with spherical washer A27.Lower leading screw 34 is fully connected with lower end plug 4, tightens lower leading screw nut
35, contact lower platform 31 with spherical washer C36.
After being installed, to bunch tube apply 10% yield strength tensile load, then plus 10% yield strength compression
Load.After recycling twice, it is offloaded to zero.Upper leading screw nut 29 and lower leading screw nut 35 are finally tightened.Arrive this, it is ensured that casing
The relatively vertical loading experiment machine 26 of going here and there be it is coaxial, i.e., perpendicular to ground.
7 uniform winding of load coil is kept the temperature outside asbestos cloth 6 on bunch tube.The spiral of wound around coil is equidistantly
200mm guarantees that the magnetic field generated on bunch tube is uniform, and without magnetic field outside coil.With outside multimeter detection coil
Without magnetic field.
Rigidity right angle frame A9 is installed, gasket and nut cover on rigidity screw 8, and tighten.By upper rigidity right angle frame A9
Vertical edge mouth penetrate rigidity screw 8, fixed with spring washer and nut twist-on.Horizontal ruler is placed on the level of rigidity right angle frame A9
Side upper surface, whether rigidity right angle frame A9 installs level in inspection.Lower rigidity right angle frame A10, upper rigidity right angle frame B11, it is lower just
It spends right angle frame B12 and is fixed on corresponding position with same method.
Magnetic induction displacement sensor female end 14 is installed in the card arc 23 of lower rigidity right angle frame A10, then fastens M10 screw
24 in M10 threaded hole 22.For magnetic induction sensing rod 15 with without 13 setting fastening of gravity rope is played, winding screw 19 puts on adjustment gasket 20,
It is screwed into the M6 threaded hole 18 of rigidity right angle frame A9.The winding to upper rigidity right angle frame A9 is twined without the other end for playing gravity rope 13
On screw 19, adjusting nut 21 is tightened, makes it not slidably.Magnetic induction sensing rod 15 is put into magnetic induction displacement sensor female end
In 14 holes, to stationary, with the vernier caliper measurement surrounding hole of 0.01mm precision, hole equalization is to terminate.When unequal,
Replacement adjustment gasket 20, keeps hole between magnetic induction sensing rod 15 and magnetic induction displacement sensor female end 14 impartial.
The connecting communications line 41 such as magnetic induction displacement sensor female end 14 and thermocouple, then connect with solemn lattice servo controller 40
It connects, solemn lattice servo controller 39 is connect with computer 40.Heating equipment is opened, load software is controlled in the dedicated displacement of starting computer,
Load is automatically controlled, starts to test.
This test is 30 DEG C to 290 DEG C ten thermal cycles, and stress varies with temperature curve as shown in Fig. 8, Fig. 9 and Figure 10,
Stress variation meets stress in ISO12835 and varies with temperature process in the process.Displacement control always 0 ± 0.254mm or 0 ±
In 0.01in.290 rank thermal production well hole conditions are simulated in success.
Claims (10)
1. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress, it is characterized in that: the measuring device includes
Rigidity right angle frame and lower rigidity right angle frame, measuring part in a pair, the pair of upper rigidity right angle frame and lower rigidity right angle frame
Vertical edge is symmetrically arranged at the upper and lower casing two sides of bunch tube displacement measurement section, and horizontal edge is respectively symmetrically equipped with installation measurement
The upper and lower positioning device of component, two sides measuring part are parallel with bunch tube displacement measurement section between upper and lower positioning device.
2. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 1, it is special
Sign is: the measuring part includes without bullet gravity rope, magnetic induction displacement sensor female end, magnetic induction sensing rod, the measurement portion
Part is connected in upper positioning device without the one end for playing gravity rope, and other end bolt has the magnetic induction sensing rod, the magnetic induction
Sensing rod is located in the inner hole of magnetic induction displacement sensor female end, moves freely, and the magnetic induction displacement sensor female end is fixed
In the lower positioning device of the lower rigidity right angle frame, and magnetic induction sensing rod and magnetic induction displacement sensor female end are coaxial.
3. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 1 or 2,
Be characterized in: the upper positioning device is equipped with boss in right-angle side lateral surface, and the boss is equipped with connection without the M6 for playing gravity rope
Screw hole is fixed by screw, and adjustment gasket is equipped between M6 screw hole and screw；The lower positioning device includes being arranged at right angle
The card arc of side lateral surface, the M10 screw hole of card arc two sides, card arc are fixed by M10 screw.
4. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 1 or 2,
It is characterized in: the upper and lower rigidity right angle frame selection 35CrMo material.
5. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 1 or 2,
Be characterized in: the verticality of the vertical edge of the upper and lower rigidity right angle frame and horizontal edge is 0.1mm.
6. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 3, it is special
Sign is: the equidistant tolerance in rigidity right angle frame horizontal edge upper surface exists under the two hole center distance of the lower rigidity right angle frame horizontal edge side screw hole
Within the scope of ± 0.10mm.
7. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 3, it is special
Sign is: the horizontal edge convex platform height of the upper rigidity right angle frame is displacement sensor female end outer radius -2mm.
8. zero-bit measuring system is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 3, it is special
Sign is: the adjustment gasket with a thickness of 0.05mm, 0.1mm, 0.5mm, 0.8mm or 1.0mm, for adjust magnetic induction sensing rod with
Magnetic induction displacement sensor female end is concentric.
9. keeping the observing and controlling side of zero-bit measuring system under a kind of circulation of bunch tube according to claim 1 elastoplasticity thermal stress
Method includes the following steps:
Step 1: installation measuring device: vertical by keeping zero-bit measuring system to be mounted under bunch tube circulation elastoplasticity thermal stress
On formula loading experiment machine, vertical load frame, bunch tube, magnetic induction sensing rod gravity both perpendicular to ground；
Step 2: simulation heating: electrical induction is selected, with the equidistant screw arrangement heat induced line of 200mm on bunch tube
Circle, only occurs in magnetic field in bunch tube；
Step 3: measurement: TT&C system selects the multi-way contral circuit of 2.5KHz iterative rate and has unique control closed loop
The solemn lattice servo controller of technology realizes smoothly loading without impact for Bit andits control load；
Step 4: data transmitting: in heating cooling procedure, displacement measurement section change in displacement, magnetic induction sensing rod is in magnetic induction position
It is moved in displacement sensor female end, variable signal is transmitted to solemn lattice servo controller, it is vertical after computer software is collected into information
Loading experiment machine loads bunch tube, and bunch tube is made to remain zero shift.
10. zero shift measurement method is kept under a kind of bunch tube circulation elastoplasticity thermal stress according to claim 9, it is special
Sign is: magnetic induction displacement sensor precision 0.01mm；Thermocouple is K-type welded type；It is the survey of 0.01mm vernier caliper with precision
The gap surrounding measured between magnetic induction sensing rod and magnetic induction sensor female end hole is impartial.
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