CN106153668A - The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment - Google Patents
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment Download PDFInfo
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- CN106153668A CN106153668A CN201610834339.0A CN201610834339A CN106153668A CN 106153668 A CN106153668 A CN 106153668A CN 201610834339 A CN201610834339 A CN 201610834339A CN 106153668 A CN106153668 A CN 106153668A
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- refrigeration case
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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Abstract
The invention discloses the device measuring aluminium drill pipe line of material constriction coefficient under a kind of low temperature environment, its air compressor passes through gas pipeline, the air inlet of nitrogen storage tank connects with nitrogen storage tank, nitrogen storage tank is connected with refrigeration case through the liquid nitrogen import of refrigeration case by nitrogen feeding pipe road, nitrogen feeding pipe road is positioned at refrigeration case inside end and arranges blower fan and liquid nitrogen disperser, there is outside refrigeration case resistance-type deformeter and temperature controller, refrigeration case is internally provided with deflector and temperature sensor, measurement test specimen and temperature-compensating test specimen it is placed with on the interior workbench of refrigeration case, measure test specimen and temperature-compensating test specimen upper surface is all pasted with foil gauge, foil gauge is connected with resistance-type deformeter by wire.The present invention can measure the linear contractive quotiety of test specimen all directions.The present invention makes liquid nitrogen gasify at refrigeration case inner homogeneous, it is to avoid it directly contacts with measuring test specimen, thus is down to minimum by it on the impact of result of the test.
Description
Technical field
The present invention relates to line of material constriction coefficient measurement apparatus field, be specifically related under a kind of low temperature environment measure aluminium alloy
The device of drill rod materials linear contractive quotiety.
Background technology
In oil and natural gas drilling well and geological drilling industry, due to increase and the complexity of drilling technology of drilling depth
Change, high specific strength that aluminium drill pipe has relative to conventional steel drilling rod because of it, highly corrosion resistant, low creep into the advantages such as energy consumption,
In being widely used in producing.But its wearability is relatively low, in actual use typically by aluminium alloy drill pipe body and steel joint
Fit together formation drill string.For realizing being reliably connected of aluminium drill pipe and steel joint, Russia have developed heat assembling
Technology, makes it expand by heating steel joint, the most quickly screws in aluminium alloy drill pipe body, produces certain after it cools down
Pretightning force realizes interference fit.Chinese patent CN 103643907 B discloses a kind of aluminum alloy drill stem body and steel joint connects
The hot assembling device used, on same experimental stand, by changing unlike material and the aluminium drill pipe of size and steel joint,
Realize heat assembling.But owing to aluminium alloy resistance to elevated temperatures is poor, hot packaging technology easily enables aluminum alloy to mechanics at tool joint
Performance produces and is decreased obviously.The coldest packaging technology is suggested to solve the problems referred to above, and Chinese patent CN 103711444 B is public
Having opened a kind of aluminum alloy drill stem body and steel joint connects the cold assembling device used, cold packaging technology is to be connect by aluminium drill pipe
At Tou, cooling makes it shrink, and the most quickly screws in steel joint, produces certain pretightning force and realize interference and join after it recovers room temperature
Closing, aluminium drill pipe mechanical property will not be had a negative impact by this method.Can for realize aluminium drill pipe and steel joint
By connecting, aluminium drill pipe material linear contractive quotiety at low ambient temperatures need to be understood, to formulate rational cooling profiles, but mesh
Before the measurement of aluminum alloy materials linear contractive quotiety at low ambient temperatures rarely had relate to, therefore effective method of testing and test dress
Put necessary.
The assay device being presently used for measuring line of material contraction (expansion) coefficient relates generally to quartz ampoule dilatometer and laser
Interference formula linear expansion coefficient measurement apparatus etc..Quartz ampoule dilatometer can accurately measure material linear expansion coefficient at high temperature,
But it is expensive, operation complexity, test specimen is required higher, and this kind of the most difficult application of device.And laser
Interference formula linear expansion coefficient measurement apparatus is the most still in laboratory stage, and its high cost and complicated operation all limit
Its popularization and application
Summary of the invention
It is an object of the present invention to provide the device measuring aluminium drill pipe line of material constriction coefficient under a kind of low temperature environment, permissible
Effectively overcome shortcoming present in prior art.
The present invention include air compressor, gas pipeline, pressure-control valve, nitrogen storage tank, nitrogen feeding pipe road, relief valve,
Refrigeration case, measurement test specimen, temperature-compensating test specimen, foil gauge and resistance-type deformeter；Air compressor passes through gas pipeline, liquid nitrogen
The air inlet of holding vessel connects with nitrogen storage tank, and gas pipeline arranges pressure-control valve, and nitrogen storage tank upper end has liquid
Nitrogen exports, and inner tube is inserted in nitrogen storage tank from liquid nitrogen outlet, and nitrogen storage tank passes refrigeration case by nitrogen feeding pipe road
Liquid nitrogen import connect with refrigeration case, nitrogen feeding pipe road has motor-operated control valve, nitrogen feeding pipe road be positioned at refrigeration case inside end arrange
Blower fan and liquid nitrogen disperser, refrigeration case is lined with heat-insulation layer, and refrigeration case top has case lid, and having resistance-type outside refrigeration case should
Become instrument and temperature controller, temperature controller for controlling temperature refrigeration case within, refrigeration case be internally provided with deflector with
Temperature sensor, refrigeration case is divided into left chamber and right chamber by deflector, and nitrogen feeding pipe road connects with the right chamber of refrigeration case, blower fan, liquid nitrogen
Disperser and temperature sensor are positioned in right chamber, and the left intracavity of refrigeration case is equipped with workbench, and workbench is placed with measurement test specimen
With temperature-compensating test specimen, measuring test specimen and temperature-compensating test specimen upper surface is all pasted with foil gauge, foil gauge is by wire and electricity
Resistive deformeter connects.
It is evenly distributed with puff prot on described liquid nitrogen disperser.
Described deflector top offers grid, and bottom is closed, to ensure that liquid nitrogen enters in refrigeration case from top, it is to avoid
Measure test specimen directly to contact with liquid nitrogen.
The wire that described foil gauge is drawn is attached eliminating by half-bridge circuit connected mode on resistance-type deformeter
The temperature impact on foil gauge.
Described measurement Specimen Shape is that cross-sectional area is not more than 100mm2, length is not more than the cuboid of 100mm.
Described temperature controller can arrange notch cuttype cooling process.
The height of described workbench is less than the 2/3 of deflector enclosure portion height.
Described workbench material is rustless steel.
Described temperature-compensating test specimen is identical with measuring Specimen Shape, and the material of temperature-compensating test specimen is quartz.
The work process of the present invention and principle:
Air with pressure is delivered in nitrogen storage tank through gas pipeline, air inlet by air compressor, under the effect of the pressure,
Liquid nitrogen enters in refrigeration case along inner tube, nitrogen feeding pipe road and liquid nitrogen import, and in refrigeration case, liquid nitrogen sprays from liquid nitrogen disperser
Go out, under the effect of blower fan, refrigeration case internal cooling, motor-operated control valve and temperature controller are controlled liquid nitrogen flow and system respectively
Cold the temperature inside the box, temperature controller can arrange notch cuttype cooling process.In refrigeration case, measure test specimen and temperature-compensating test specimen is placed
On workbench, test specimen being all pasted with foil gauge, the wire that foil gauge is drawn presses half-bridge circuit even on resistance-type deformeter
The mode of connecing is attached the impact eliminating temperature to foil gauge, can be recorded measurement by resistance-type deformeter under certain temperature difference
The strain value of test specimen, thus calculate the linear contractive quotiety of aluminium drill pipe material under this temperature difference.
The present invention compared with prior art has the advantages that
1, the present invention utilizes ultralow temperature foil gauge and resistance-type deformeter, combines with refrigeration case, instead of traditional stone
English tube swelling instrument, reduces experimentation cost, and can detect the linear contractive quotiety measuring test specimen all directions.The present invention also improves
Liquid nitrogen disperser and the structure of deflector, make liquid nitrogen gasify at refrigeration case inner homogeneous, it is to avoid it directly connects with measurement test specimen
Touch, thus the impact of result of the test is down to minimum by it.
2, the present invention can also measure other metal and alloy materials linear contractive quotiety at low ambient temperatures.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram
Fig. 2 is the liquid nitrogen disperser structural representation of the present invention
Fig. 3 is the deflector structure schematic diagram of the present invention
Wherein: 1-air compressor, 2-gas pipeline, 3-nitrogen storage tank, 4-nitrogen feeding pipe road, 5-refrigeration case, 6-measures
Test specimen, 7-temperature-compensating test specimen, 8-foil gauge, 9-resistance-type deformeter, 10-pressure-control valve, 11-air inlet, 12-liquid nitrogen goes out
Mouthful, 13-inner tube, 14-relief valve, 15-case lid, 16-heat-insulation layer, 17-liquid nitrogen import, 18-motor-operated control valve, 19-temperature
Controller, 20-blower fan, 21-liquid nitrogen disperser, 22-temperature sensor, 23-deflector, 24-workbench, 25-puff prot, 26-
Grid, 27-wire.
Detailed description of the invention
As it is shown in figure 1, the present invention includes air compressor 1, gas pipeline 2, pressure-control valve 10, nitrogen storage tank 3, defeated
Nitrogen pipeline 4, relief valve 14, refrigeration case 5, measurement test specimen 6, temperature-compensating test specimen 7, foil gauge 8 and resistance-type deformeter 9；Air
Compressor 1 is connected with nitrogen storage tank 3 by gas pipeline 2, the air inlet 11 of nitrogen storage tank 3, and gas pipeline 2 arranges pressure
Force control valve 10, nitrogen storage tank 3 upper end has liquid nitrogen outlet 12, and inner tube 13 is inserted in liquid nitrogen storage from liquid nitrogen outlet 12
In tank 3, nitrogen storage tank 3 is connected with refrigeration case 5 through the liquid nitrogen import 17 of refrigeration case 5 by nitrogen feeding pipe road 4, nitrogen feeding pipe road 4
On there is motor-operated control valve 18, nitrogen feeding pipe road 4 is positioned at refrigeration case 5 inside end and arranges blower fan 20 and liquid nitrogen disperser 21, refrigeration case 5
Being lined with heat-insulation layer 16, refrigeration case 5 top has case lid 15, and refrigeration case 5 is outside has resistance-type deformeter 9 and temperature controller
19, temperature controller 19 is for controlling the temperature within refrigeration case 5, and refrigeration case 5 is internally provided with deflector 23 and temperature sensing
Device 22, refrigeration case 5 is divided into left chamber A and right chamber B by deflector 23, and nitrogen feeding pipe road 4 connects with the right chamber B of refrigeration case 5, blower fan 20,
Liquid nitrogen disperser 21 and temperature sensor 22 are positioned in right chamber B, and the left chamber A of refrigeration case 5 is built-in with workbench 24, on workbench 24
It is placed with measurement test specimen 6 and temperature-compensating test specimen 7, measures test specimen 6 and temperature-compensating test specimen 7 upper surface is all pasted with foil gauge 8,
Foil gauge 8 is connected with resistance-type deformeter 9 by wire 27.
As in figure 2 it is shown, be evenly distributed with puff prot 25 on described liquid nitrogen disperser 21.
As it is shown on figure 3, described deflector 23 top offers grid 26, bottom is closed, to ensure that liquid nitrogen enters from top
Enter in refrigeration case 5, it is to avoid measure test specimen 6 and directly contact with liquid nitrogen.
Described foil gauge 8 draw wire 27 on resistance-type deformeter 9 by half-bridge circuit connected mode be attached with
Eliminate the temperature impact on foil gauge 8.
Described measurement test specimen 6 is shaped as cross-sectional area and is not more than 100mm2, length is not more than the cuboid of 100mm.
Described temperature controller 19 can arrange notch cuttype cooling process.
The height of described workbench 24 is less than the 2/3 of deflector enclosure portion height.
Described workbench 24 material is rustless steel.
Described temperature-compensating test specimen 7 is identical with measuring test specimen 6 shape, and the material of temperature-compensating test specimen 7 is quartz.
The work process of the present invention:
Air with pressure is delivered in nitrogen storage tank 3, at the work of pressure through gas pipeline 2, air inlet 11 by air compressor 1
Under with, liquid nitrogen enters in refrigeration case 5 along inner tube 13, nitrogen feeding pipe road 4 and liquid nitrogen import 17, and in refrigeration case 5, liquid nitrogen is from liquid
Nitrogen disperser 21 sprays, to refrigeration case 5 internal cooling under the effect of blower fan 20, and motor-operated control valve 18 and temperature controller 19 points
Not Kong Zhi temperature in liquid nitrogen flow and refrigeration case 5, temperature controller 19 can arrange notch cuttype cooling process.In refrigeration case 5, measure
Test specimen 6 and temperature-compensating test specimen 7 are positioned on workbench 24, and test specimen is all pasted with foil gauge 8, the wire that foil gauge 8 is drawn
27 are attached, by half-bridge circuit connected mode, the impact that eliminates temperature to foil gauge 8, necessarily on resistance-type deformeter 9
The temperature difference under can be recorded the strain value measuring test specimen 6 by resistance-type deformeter 9, thus calculate aluminium drill pipe material under this temperature difference
The linear contractive quotiety of material.
Instantiation:
As it is shown in figure 1, the temperature-compensating test specimen 7 measuring test specimen 6 and quartz material of 7075Al material is processed into transversal
Area 88mm2, the rectangular shape of a length of 70mm, and be positioned on workbench 24.Measure test specimen 6 and temperature-compensating test specimen 7
The upper foil gauge 8 that is pasted with respectively, the wire 27 that foil gauge 8 is drawn is connected to resistance-type deformeter by half-bridge circuit connected mode
On 9, after having connected, cover case lid 15,
Cooling process is set in temperature controller 19, starts refrigeration case 5.Now, open air compressor 1, adjust pressure
Force control valve 10 makes admission pressure be 0.4MPa.Gas enters nitrogen storage tank 3 from air inlet 11, under the effect of the pressure,
Liquid nitrogen flows through liquid nitrogen outlet 12 through inner tube 13, and enters in nitrogen feeding pipe road 4.If appearance of abnormal pressure in process of the test, can
Open relief valve 14 and carry out release.Liquid nitrogen uniformly sprays into refrigeration case 5 from liquid nitrogen import 17, liquid nitrogen disperser 21 and deflector 23
In.In temperature-fall period, temperature controller 19 and temperature sensor 22, motor-operated control valve 18 coordinate control liquid nitrogen flow.
In certain temperature difference T, resistance-type deformeter 9 reading is the strain value ε measuring test specimen, then interval in this cooling
In, the linear contractive quotiety α of 7075Al can be according to the following formula:
Wherein α ' is the linear contractive quotiety of quartz, can take 5.5 × 10-7。
Thus can measure 7075Al linear contractive quotiety in certain temperature difference T.
Claims (9)
1. under a low temperature environment, measure the device of aluminium drill pipe line of material constriction coefficient, it is characterised in that: include air pressure
Contracting machine (1), gas pipeline (2), pressure-control valve (10), nitrogen storage tank (3), nitrogen feeding pipe road (4), relief valve (14), refrigeration
Case (5), measurement test specimen (6), temperature-compensating test specimen (7), foil gauge (8) and resistance-type deformeter (9)；Air compressor (1) leads to
Cross gas pipeline (2), the air inlet (11) of nitrogen storage tank (3) connects with nitrogen storage tank (3), and gas pipeline (2) is upper to be arranged
Pressure-control valve (10), nitrogen storage tank (3) upper end has liquid nitrogen outlet (12), and inner tube (13) is inserted from liquid nitrogen outlet (12)
Enter in nitrogen storage tank (3), nitrogen storage tank (3) by nitrogen feeding pipe road (4) through refrigeration case (5) liquid nitrogen import (17) with
Refrigeration case (5) connects, and nitrogen feeding pipe road (4) have motor-operated control valve (18), and nitrogen feeding pipe road (4) are positioned at refrigeration case (5) inside end
Arranging blower fan (20) and liquid nitrogen disperser (21), refrigeration case (5) is lined with heat-insulation layer (16), and refrigeration case (5) top has case lid
(15), refrigeration case (5) is outside has resistance-type deformeter (9) and temperature controller (19), and temperature controller (19) is used for controlling
The temperature that refrigeration case (5) is internal, refrigeration case (5) is internally provided with deflector (23) and temperature sensor 22, and deflector (23) will
Refrigeration case (5) is divided into left chamber (A) and right chamber (B), and nitrogen feeding pipe road (4) connect with the right chamber (B) of refrigeration case (5), blower fan (20), liquid
Nitrogen disperser (21) and temperature sensor 22 are positioned in right chamber (B), and the left chamber (A) of refrigeration case (5) is built-in with workbench (24), work
It is placed with measurement test specimen (6) and temperature-compensating test specimen (7) in station (24), measures test specimen (6) and temperature-compensating test specimen (7) upper end
Face is all pasted with foil gauge (8), and foil gauge (8) is connected with resistance-type deformeter (9) by wire (27).
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
It is characterised by: on described liquid nitrogen disperser (21), be evenly distributed with puff prot (25).
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
Being characterised by: described deflector (23) top offers grid (26), deflector (23) bottom is closed.
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
It is characterised by: the wire (27) that described foil gauge (8) is drawn is carried out by half-bridge circuit connected mode on resistance-type deformeter (9)
Connect.
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
It is characterised by: described measurement test specimen (6) is shaped as cross-sectional area and is not more than 100mm2, length is not more than the cuboid of 100mm.
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
It is characterised by: the height of described workbench (24) is less than the 2/3 of deflector enclosure portion height.
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
It is characterised by: described workbench (24) material is rustless steel.
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
It is characterised by: described temperature-compensating test specimen (7) is identical with measuring test specimen (6) shape, and the material of temperature-compensating test specimen (7) is stone
English.
The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment the most according to claim 1, its
It is characterised by: described temperature controller (19) is provided with notch cuttype cooling process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610834339.0A CN106153668A (en) | 2016-09-20 | 2016-09-20 | The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610834339.0A CN106153668A (en) | 2016-09-20 | 2016-09-20 | The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment |
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| CN106153668A true CN106153668A (en) | 2016-11-23 |
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| CN201610834339.0A Pending CN106153668A (en) | 2016-09-20 | 2016-09-20 | The device of aluminium drill pipe line of material constriction coefficient is measured under a kind of low temperature environment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769395A (en) * | 2017-01-20 | 2017-05-31 | 中国科学院理化技术研究所 | For material at low temperature static mechanical property, continuously strain records test system with image |
| CN110806290A (en) * | 2019-11-25 | 2020-02-18 | 中国特种设备检测研究院 | Test bench for detecting micro leakage of valve by using methane |
| CN111175341A (en) * | 2019-12-10 | 2020-05-19 | 南京玻璃纤维研究设计院有限公司 | Optical test system and test method for low-temperature linear expansion coefficient of material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769395A (en) * | 2017-01-20 | 2017-05-31 | 中国科学院理化技术研究所 | For material at low temperature static mechanical property, continuously strain records test system with image |
| CN106769395B (en) * | 2017-01-20 | 2023-11-28 | 中国科学院理化技术研究所 | Continuous strain and image recording test system for low-temperature static mechanical properties of materials |
| CN110806290A (en) * | 2019-11-25 | 2020-02-18 | 中国特种设备检测研究院 | Test bench for detecting micro leakage of valve by using methane |
| CN111175341A (en) * | 2019-12-10 | 2020-05-19 | 南京玻璃纤维研究设计院有限公司 | Optical test system and test method for low-temperature linear expansion coefficient of material |
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Application publication date: 20161123 |