CN104596916A - Circulating oxidization experiment device controlled by crank slide block mechanism and oxidization performance testing method - Google Patents
Circulating oxidization experiment device controlled by crank slide block mechanism and oxidization performance testing method Download PDFInfo
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- CN104596916A CN104596916A CN201510071307.5A CN201510071307A CN104596916A CN 104596916 A CN104596916 A CN 104596916A CN 201510071307 A CN201510071307 A CN 201510071307A CN 104596916 A CN104596916 A CN 104596916A
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Abstract
The invention provides a circulating oxidization experiment device controlled by a crank slide block mechanism and an oxidization performance testing method. The circulating oxidization experiment device comprises the crank slide block mechanism, a bracket base and a sample tray arranged on the bracket base, wherein the bracket base is provided with an electric driving guide rod capable of driving the sample tray to enter a heating furnace; a crank of the crank slide block mechanism is connected with a steel rod and a furnace door of the heating furnace in sequence; a connection rod penetrates through the bracket base to be hinged with a slide block; the hinged part of the connection rod and the crank is connected with a rack by an elastic piece; the control system is composed of a temperature control unit and a time circulating control unit; the electric driving guide rod drives a sample bracket base to vertically move in and out of the heating furnace; and the slide block is driven to move upwards or downwards under the common effect of the bracket base and the spring, so that the opening and closing of the furnace door of the heating furnace are realized. The circulating oxidization experiment device can be used for automatically controlling and simulating a high temperature-low temprature oxidization alternative environment and the time is saved.
Description
Technical field
The present invention relates to a kind of epoxidation experiments device and oxidation susceptibility method of testing, the epoxidation experiments device of specifically a kind of slider-crank mechanism control and oxidation susceptibility method of testing.
Background technology
In active service ultra supercritical power station unit, mistake/reheater is as the critical component of boiler, and working environment is very severe, and the corrosion that its inside pipe wall is subject to high-temperature water vapor for a long time easily forms oxide film.These oxide films are less than (mostly now being ferrite/martensite steel or austenitic steel) of matrix alloy due to thermal expansivity, when boiler varying load or start and stop, easily bear larger thermal stress (being generally compressive stress) and peel off.A large amount of practice shows, the booster caused by spalling of oxide film is the one of the main reasons that 600 DEG C of ultra-supercritical boiler tube failures and power generation reduce.For 700 DEG C of advanced ultra supercritical power station mistake/reheater candidate's alloys that current countries in the world being are are being researched and developed energetically, the antistrip performance of antioxygenic property especially oxide film will be one of its Key Performance Indicator.Thus, assess and predict that active service/reheater heat-resisting steel or 700 DEG C of level overcritical power station mistake/reheater high temperature oxidation resistances (especially the antistrip performance of oxide film) of candidate's alloy are needed badly.
Usually, the high temperature oxidation resistance assessing heat-resisting steel and other alloy realizes by carrying out high-temperature oxydation experiment.High-temperature oxydation experiment is the research reaction kinetics of metal or alloy under the environmental baselines such as different temperatures, pressure and atmosphere and a kind of means of oxidation mechanism.Its fundamental purpose explains the mechanism of oxide growth and destruction and affects the key factor of metal or alloy high temperature oxidation resistance, to seeking the approach suppressing or reduce high-temperature oxydation loss.High-temperature oxydation experiment comprises constant temperature oxidation dynamic experiment and epoxidation experiments.Constant temperature oxidation experiment, in order to measure the oxidation rate of alloy at particular atmosphere, temperature, mainly adopts the thermogravimetric technology of continuous weighting.And cyclic oxidation test is for evaluating the adhesion between oxide film and metallic matrix, i.e. oxide film cracking resistance and performance of peeling off when temperature cycles changes.At present, cyclic oxidation test mainly carries out in muffle furnace, and sample is incubated a period of time under high temperature corrosion condition, takes out cooling subsequently, so repeatedly.The shortcoming of this method is loaded down with trivial details, and each cycle period needs experimenter to participate in, and wastes time and energy.And existing thermogravimetric analyzer, heating furnace etc. all do not possess the function of automatically carrying out heat-SAPMAC method oxidation.For this reason, in the urgent need to a set of automatic control, high temperature-low temperature oxidation can be simulated to hocket the experimental provision of environment.
Summary of the invention
The epoxidation experiments device that the object of the present invention is to provide a kind of slider-crank mechanism to control and oxidation susceptibility method of testing, it can be tested by control simulation high temperature-low temperature oxidation alternate environment automatically, saves time.
In order to achieve the above object, the epoxidation experiments device that slider-crank mechanism of the present invention controls is made up of heating furnace, mounting system and control system; Mounting system comprises slider-crank mechanism, bracket base and is placed on for placing the sample tray of testing sample on bracket base, and bracket base is provided with and bracket base can be driven to move make sample tray to enter motorized motions guide rod in heating furnace; Slider-crank mechanism is made up of slide block hinged successively, connecting rod and crank, and crank is connected with steel pole and Compaction of Heating Furnace Door successively, connecting rod through bracket base and slide block hinged, the hinged place of connecting rod and crank is connected in frame by elastic component; Control system is made up of with closed time cycle control unit the temperature control unit controlling inside heating furnace temperature, heating rate and temperature retention time and the unlatching that controls the lifting of bracket base and Compaction of Heating Furnace Door;
Elastic component is in maximum tension state, and Compaction of Heating Furnace Door is closed, and bracket base is positioned at initial position; Elastic component is contracted to equilibrium state, and Compaction of Heating Furnace Door is opened, and sample tray enters in heating furnace.
Described heating furnace comprises stainless steel casing and is located at the burner hearth in stainless steel casing, and be provided with heating element and thermopair in burner hearth, be provided with heat-insulation layer between burner hearth and stainless steel casing, stainless steel casing is fixedly connected with bracket base.
Described heating element adopts resistance wire, Elema or Si-Mo rod.
Described heat-insulation layer adopts refractory brick or ceramic fiber to make.
Described bracket base is provided with two guide poles be connected with stainless steel casing, and motorized motions guide rod is between two guide poles.
The second circular trough described bracket base offering the oval guide groove moved in the horizontal direction for limiting rod, the first circular trough that restriction motorized motions guide rod moves at vertical direction and corresponding guide pole can be limited on bracket base.
Described sample tray is the cylindrical pallet adopting laying fireproof bricks, and burner hearth is cylindrical, and the diameter of sample tray is less than or equal to the diameter of burner hearth.
Described temperature control unit adopts electronic PID regulable control table, and time cycle control unit adopts controller cycling time.
An oxidation susceptibility method of testing for the epoxidation experiments device adopting described slider-crank mechanism to control, comprises the following steps:
1) be suspended on sample holder by testing sample, be placed on sample tray by sample together with sample holder, now elastic component is in maximum tension state, and bracket base is positioned at original state, and Compaction of Heating Furnace Door is closure state;
2) in a manual mode, utilize temperature control unit to set the internal temperature of heating furnace, heating rate and temperature retention time to control the temperature and time parameter of heating furnace, utilize time cycle control unit to set the lifting of bracket base and the unlatching of Compaction of Heating Furnace Door and closed time with Quality control pallet in heating-furnace inside and outside time;
3) automatic mode is switched to, start motorized motions guide rod, time cycle control unit controls motorized motions guide rod is utilized to drive the bracket base being loaded with sample tray to move to direction, heating furnace place, and finally make sample tray enter flat-temperature zone in heating furnace, in this process, elastic component shrinks gradually from maximum tension state, slide block moves to direction, heating furnace place, the clockwise amplitude of oscillation of connecting rod, crank does counterclockwise arc motion centered by the junction of crank and connecting rod, Compaction of Heating Furnace Door is opened gradually, until elastic component returns back to equilibrium state, crank stop motion, now slide block and bracket base depart from, Compaction of Heating Furnace Door completes unlatching,
4) when sample tray arrives flat-temperature zone in heating furnace, time cycle control unit starts to be incubated timing, when after arrival temperature retention time, utilize time cycle control unit controls motorized motions guide rod to drive the bracket base being loaded with sample tray to leave heating furnace, and get back to initial position; In this process, when bracket base and shoe contact, start to move to the direction away from heating furnace with movable slider, now elastic component stretches from equilibrium state, the amplitude of oscillation that connecting rod is counterclockwise, crank does clockwise arc motion centered by the junction of crank and connecting rod, and Compaction of Heating Furnace Door starts to close gradually;
5) get back to initial position, testing sample cools;
6) step 3 is repeated) and 4) until arrive the required cycle index of experiment; Terminate experiment, sample analysis.
Compared with prior art, beneficial effect of the present invention is:
The present invention utilizes motorized motions guide rod to make the sample tray that testing sample is housed enter and leave in heating furnace, pass through bracket base simultaneously, slider-crank mechanism and the elastic component be connected with slider-crank mechanism make Compaction of Heating Furnace Door automatic open-close, and pass through setting control system, heating parameters in control heating furnace and the stroke of motorized motions guide rod, high temperature-low temperature oxidation alternate environment can be simulated test, realize the automatic control that Alloy Anti oxidation susceptibility is measured, substantially reduce experimental period, cost-saving, and be specially adapted to stainless steel, heat-resisting steel, the test of the oxide film antistrip performance in the corrosion environment of cold cycling such as high temperature alloy.In addition, bracket base of the present invention can also play the effect of Compaction of Heating Furnace Door after the sample tray being loaded with testing sample enters heating furnace, realizes the function of one-object-many-purposes.
Accompanying drawing explanation
Fig. 1 is overall schematic of the present invention;
Fig. 2 is the vertical view of bracket base of the present invention;
Fig. 3 is the front elevation of bracket base of the present invention;
Wherein, 1, heating furnace, 2, guide pole, 3, motorized motions guide rod, 4, elastic component, 5, slide block, 6, Compaction of Heating Furnace Door, 7, crank, 8, connecting rod, 9, steel pole, 10, sample tray, 11, bracket base, 12, stainless steel casing, 13, heat-insulation layer, 14, burner hearth, 15, oval guide groove, the 16, first circular trough, the 17, second circular trough.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described, to describe technical scheme of the present invention in detail.
See Fig. 1, the epoxidation experiments device that slider-crank mechanism of the present invention controls is used to realize the automatic test of oxidation susceptibility in the corrosion environment that alloy circulates in cold-hot; Be made up of heating furnace 1, mounting system and control system.
Heating furnace 1 provides thermal source for laboratory sample, comprise stainless steel casing 12 and be located at the burner hearth 14 that the cylindrical refractory brick in stainless steel casing 12 makes, be provided with heating element and thermopair in burner hearth 14, between burner hearth 14 and stainless steel casing 12, be provided with heat-insulation layer 13; Heat-insulation layer 13 adopts common refractory brick or ceramic fiber to make, and heating element can be selected because temperature requirements is different to adopt resistance wire, Elema or Si-Mo rod.In heating furnace, working temperature can reach 1200 DEG C, each temperature spot homogeneous temperature in stove, be no more than with the deviation of set point of temperature ± 5 DEG C.
Mounting system comprises slider-crank mechanism, bracket base 11 and is placed on for placing the sample tray 10 of testing sample on bracket base 11, and bracket base 11 is provided with and bracket base 11 can be driven to move make sample tray 10 to enter motorized motions guide rod 3 in heating furnace 1; Motorized motions guide rod 3 is fixed on stainless steel casing 12, bracket base 11 is also provided with two guide poles 2 be connected with stainless steel casing 12, and motorized motions guide rod 3 is between two guide poles 2.Sample tray 10 adopts the cylindrical pallet of laying fireproof bricks, and the diameter that the diameter of sample tray 10 is less than or equal to burner hearth 14 can enter in heating furnace 1 to make sample tray 10;
See Fig. 2 and Fig. 3, bracket base 11 offers move in the horizontal direction for limiting rod 8 oval guide groove 15, restriction motorized motions guide rod 3 is at the first circular trough 16 of vertical direction motion and second circular trough 17 that corresponding guide pole 2 can be limited on bracket base 11.
Slider-crank mechanism is made up of slide block 5 hinged successively, connecting rod 8 and crank 7, and connecting rod 8 is hinged through bracket base 11 and slide block 5, and the hinged place of connecting rod 8 and crank 7 is connected in frame by elastic component 4; Crank 7 is connected with steel pole 9 and Compaction of Heating Furnace Door 6 successively, and all adopts pin to be fixedly connected with between crank 7 with steel pole 9, between steel pole 9 with Compaction of Heating Furnace Door 6; Elastic component 4 is preferably spring.
Control system is made up of the temperature control unit be enclosed in casing and time cycle control unit, and can switch between manual and automatic two kinds of patterns, two control modules work alone, and control respectively to heating furnace 1 and mounting system.Time manual, closing control system, during automatic operation, temperature control unit controls heating furnace 1 internal temperature, heating rate and temperature retention time, the lifting of time cycle control unit controls bracket base 11 and the unlatching of Compaction of Heating Furnace Door 6 with closed, thus control the time of testing sample in the inside and outside stop of heating furnace 1.Temperature control unit adopts PID regulator; Time cycle control unit adopts controller cycling time.
The epoxidation experiments device that the present invention adopts slider-crank mechanism according to claim 1 to control, carries out alloy oxidation performance test, comprises the following steps:
1) be suspended on sample holder by testing sample, be placed on sample tray 10 by sample together with sample holder, now elastic component 4 is in maximum tension state, and bracket base 11 is positioned at original state, and Compaction of Heating Furnace Door 6 is closure state;
2) in a manual mode, utilize temperature control unit to set the internal temperature of heating furnace 1, heating rate and temperature retention time to control the temperature and time parameter of heating furnace 1, utilize time cycle control unit to set the lifting of bracket base 11 and the unlatching of Compaction of Heating Furnace Door 6 and closed time with Quality control pallet 10 in heating furnace 1 inside and outside time;
3) automatic mode is switched to, start motorized motions guide rod 3, time cycle control unit controls motorized motions guide rod 3 is utilized to drive the bracket base 11 being loaded with sample tray 10 to move to direction, heating furnace 1 place, and finally make sample tray 10 enter flat-temperature zone in heating furnace 1, in this process, elastic component 4 shrinks gradually from maximum tension state, slide block 5 moves to direction, heating furnace 1 place, connecting rod 8 is the amplitude of oscillation clockwise, crank 7 does counterclockwise arc motion centered by the junction of crank (7) and connecting rod (8), Compaction of Heating Furnace Door 6 is opened gradually, until elastic component 4 returns back to equilibrium state, crank 7 stop motion, now slide block 5 and bracket base 11 depart from, Compaction of Heating Furnace Door 6 completes unlatching,
4) when sample tray 10 arrives flat-temperature zone in heating furnace 1, time cycle control unit starts to be incubated timing; When after arrival temperature retention time, utilize time cycle control unit controls motorized motions guide rod 3 to drive the bracket base 11 being loaded with sample tray 10 to leave heating furnace 1, and get back to initial position; In this process, when bracket base 11 contacts with slide block 5, start to move to the direction away from heating furnace 1 with movable slider 5, now elastic component 4 stretches from equilibrium state, connecting rod 8 is the amplitude of oscillation counterclockwise, crank 7 does clockwise arc motion centered by the junction of crank (7) and connecting rod (8), and Compaction of Heating Furnace Door 6 closes gradually;
5) get back to initial position, testing sample cools;
6) step 3 is repeated) to 5) until arrive the required cycle index of experiment; Terminate experiment, sample analysis, thus the oxidation susceptibility realized in the corrosive atmosphere that alloy circulate in cold-hot is tested.
Claims (9)
1. an epoxidation experiments device for slider-crank mechanism control, is characterized in that: be made up of heating furnace (1), mounting system and control system; Mounting system comprises slider-crank mechanism, bracket base (11) and is placed on for placing the sample tray (10) of testing sample on bracket base (11), and bracket base (11) is provided with and the mobile sample tray (10) that makes of bracket base (11) can be driven to enter motorized motions guide rod (3) in heating furnace (1); Slider-crank mechanism is made up of slide block (5) hinged successively, connecting rod (8) and crank (7), crank (7) is connected with steel pole (9) and Compaction of Heating Furnace Door (6) successively, connecting rod (8) is hinged through bracket base (11) and slide block (5), and the hinged place of connecting rod (8) and crank (7) is connected in frame by elastic component (4); Control system is by controlling the temperature control unit of heating furnace (1) internal temperature, heating rate and temperature retention time and controlling the lifting of bracket base (11) and the unlatching of Compaction of Heating Furnace Door (6) forms with closed time cycle control unit;
Elastic component (4) is in maximum tension state, and Compaction of Heating Furnace Door (6) is closed, and bracket base (11) is positioned at initial position; Elastic component (4) is contracted to equilibrium state, and Compaction of Heating Furnace Door (6) is opened, and sample tray (10) enters in heating furnace (1).
2. the epoxidation experiments device of slider-crank mechanism control according to claim 1, it is characterized in that: described heating furnace (1) comprises stainless steel casing (12) and is located at the burner hearth (14) in stainless steel casing (12), burner hearth is provided with heating element and thermopair in (14), be provided with heat-insulation layer (13) between burner hearth (14) and stainless steel casing (12), stainless steel casing (12) is fixedly connected with bracket base (11).
3. the epoxidation experiments device of slider-crank mechanism control according to claim 2, is characterized in that: described heating element adopts resistance wire, Elema or Si-Mo rod.
4. the epoxidation experiments device of slider-crank mechanism control according to claim 2, is characterized in that: described heat-insulation layer (13) adopts refractory brick or ceramic fiber to make.
5. the epoxidation experiments device of slider-crank mechanism control according to claim 2, it is characterized in that: described bracket base (11) is also provided with two guide poles (2) be connected with stainless steel casing (12), and motorized motions guide rod (3) is positioned between two guide poles (2).
6. the epoxidation experiments device that controls of slider-crank mechanism according to claim 2, is characterized in that: the second circular trough (17) described bracket base (11) offering the oval guide groove (15) moved in the horizontal direction for limiting rod (8), the first circular trough (16) that restriction motorized motions guide rod (3) is moved at vertical direction and corresponding guide pole (2) can be limited on bracket base (11).
7. the epoxidation experiments device of slider-crank mechanism control according to claim 1, it is characterized in that: described sample tray (10) is the cylindrical pallet adopting laying fireproof bricks, burner hearth (14) is for cylindrical, and the diameter of sample tray (10) is less than or equal to the diameter of burner hearth (14).
8. the epoxidation experiments device of slider-crank mechanism control according to claim 1, it is characterized in that: described temperature control unit adopts electronic PID regulable control table, time cycle control unit adopts controller cycling time.
9. an oxidation susceptibility method of testing for the epoxidation experiments device adopting slider-crank mechanism according to claim 1 to control, is characterized in that:
1) testing sample is suspended on sample holder, sample is placed on sample tray (10) together with sample holder, now elastic component (4) is in maximum tension state, bracket base (11) is positioned at original state, and Compaction of Heating Furnace Door (6) is closure state;
2) in a manual mode, utilize temperature control unit to set the internal temperature of heating furnace (1), heating rate and temperature retention time to control the temperature and time parameter of heating furnace (1), utilize time cycle control unit to set the lifting of bracket base (11) and the unlatching of Compaction of Heating Furnace Door (6) and closed time with Quality control pallet (10) in heating furnace (1) stove inside and outside time;
3) automatic mode is switched to, start motorized motions guide rod (3), time cycle control unit controls motorized motions guide rod (3) is utilized to drive the bracket base (11) being loaded with sample tray (10) to move to heating furnace (1) direction, place, and finally make sample tray (10) enter flat-temperature zone in heating furnace (1), in this process, elastic component (4) shrinks gradually from maximum tension state, slide block (5) moves to heating furnace (1) direction, place, connecting rod (8) is the amplitude of oscillation clockwise, crank (7) does counterclockwise arc motion centered by the junction of crank (7) and connecting rod (8), Compaction of Heating Furnace Door (6) is opened gradually, until elastic component (4) returns back to equilibrium state, crank (7) stop motion, now slide block (5) and bracket base (11) depart from, Compaction of Heating Furnace Door (6) completes unlatching,
4) when sample tray (10) arrives flat-temperature zone in heating furnace (1), time cycle control unit starts to be incubated timing, when after arrival temperature retention time, utilize time cycle control unit controls motorized motions guide rod (3) to drive the bracket base (11) being loaded with sample tray (10) to leave heating furnace (1), and get back to initial position; In this process, when bracket base (11) contacts with slide block (5), band movable slider (5) starts to move to the direction away from heating furnace (1), now elastic component (4) stretches from equilibrium state, connecting rod (8) is the amplitude of oscillation counterclockwise, crank (7) does clockwise arc motion centered by the junction of crank (7) and connecting rod (8), and Compaction of Heating Furnace Door (6) starts to close gradually;
5) get back to initial position, testing sample cools;
6) step 3 is repeated) and 4) until arrive the required cycle index of experiment; Terminate experiment, sample analysis.
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| CN108226154A (en) * | 2017-11-27 | 2018-06-29 | 洛阳西格马炉业股份有限公司 | A kind of superhigh temperature antioxygenic property test platform and test method |
| CN111443212A (en) * | 2020-03-13 | 2020-07-24 | 币冠(上海)生物科技有限公司 | Medical sample analysis device |
| CN114459890A (en) * | 2022-01-24 | 2022-05-10 | 山东大学 | Right-angle connection type double-furnace-cover efficient coating thermal shock test device and method |
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