CN100442043C - High-pressure pot device for muclear electric material static corrosion test - Google Patents
High-pressure pot device for muclear electric material static corrosion test Download PDFInfo
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- CN100442043C CN100442043C CNB2006101408827A CN200610140882A CN100442043C CN 100442043 C CN100442043 C CN 100442043C CN B2006101408827 A CNB2006101408827 A CN B2006101408827A CN 200610140882 A CN200610140882 A CN 200610140882A CN 100442043 C CN100442043 C CN 100442043C
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Abstract
This invention relates to a high pressure kettle device for static erosion test of nuclear-electric materials including a cover and a body sleeved with a heating electric oven at the outer wall of the body, a heat radiation rod is set on the cover connected with a gas discharge valve, a pressure meter and a safety device, a thermocouple is plugged in a temperature-test tube on the cover, the cover and the body are rigidly sealed by cone linear contact, a guide neck is set at the bottom of the kettle cover, location pins are set on the end face of the top of the body, the cover and the body are screwed tightly by big nut a screwer and several fastening screws are set on the big nut screwer, a controller, a temperature control tube is set in the tiles of a heating oven and the thermocouple is plugged in the temperature - control tube and the safety device is a blow-up sheet.
Description
Technical field
The present invention relates to a kind of device that is used for the corrosion resistance research experiment of material, be specifically related to a kind of autoclave device that is used for the nuclear material static corrosion test.
Background technology
The corrosion damage of material is one of major reason that influences the normal operation of nuclear power station.In order to understand the reason and the mechanism of material corrosion damage, work out corresponding preventive measure, just need be to the corrosion resistance research experiment of material.Nuclear material static corrosion test autoclave device is a kind of device that material is carried out corrosion test under the condition of simulation nuclear power station one, secondary circuit high temperature and high pressure condition.The principle of work of this device, be test(ing) medium and test specimen, be placed in the dismountable seal-off pressure container (autoclave), heat by the electrothermal stove that adds that is installed in the still outer wall, autoclave is heated up, utilize the saturation pressure of test(ing) medium saturated vapour generation, cause the working environment of a High Temperature High Pressure in autoclave, test specimen carries out long-term corrosion test in the environment of this simulation nuclear power station one, secondary circuit operating mode.The automatic temperature control system of equipment is guaranteed the long-term automatically operation of equipment under high temperature and high pressure condition, after the test period of waiting to reach specified, has a power failure, lowers the temperature, opens still, takes out sample, and the Corrosion results of sample is carried out analyzing evaluation.
Existing nuclear material corrosion test adopts flange tongue and groove red copper plain cushion hermetically-sealed construction with the body seal of autoclave, and kettle is a monoblock type, and the bottom does not have perforate.The autoclave of this version, mounting or dismounting, cleaning, use, very inconvenient, easily cause kettle to leak, the copper ion that test findings is caused adverse effect is easily introduced in the existence of copper washer in the corrosion test medium, and after each off-test, equal copper washers that need more renew.In addition because kettle adopts monolithic construction, processing charges material, time-consuming, effort have increased the manufacturing cost of equipment.By consulting, retrieve the patent of six kinds of autoclaves and relevant rotary system thereof sealing, the patent No. is respectively ZL92220748.8, ZL94242541.3, ZL96223604.7, ZL200420021836.1, ZL200420036964.3, ZL200520022881.3.Related autoclave in above-mentioned each patent, major part only is applicable to the working environment in simulated oil gas field, and working pressure or working temperature are lower, all can not satisfy the requirement of nuclear power station one, secondary circuit high temperature, high-pressure work parameter simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, easy to operate, easy to manufacture, with low cost, safe and reliable, the nuclear material static corrosion test autoclave device that can simulate nuclear power station High Temperature High Pressure working environment.
The autoclave device that is used for the nuclear material static corrosion test of the present invention, comprise kettle cover and kettle, be with at the kettle outer wall and add electrothermal stove, on kettle cover, be provided with heat-removal bar, heat-removal bar links to each other with air release, tensimeter, safety feature respectively, and temperature thermocouple is inserted in the temperature tube on the kettle cover, and kettle cover adopts the ball conical surface line contact firmly with kettle and seals, be provided with the guiding neck in the kettle cover lower end, on kettle end face suitable for reading, be provided with tommy; Kettle cover and kettle compress by big-nut wrenching device, and big-nut wrenching device is provided with several trip bolts; Temperature-controlled tube is arranged in the tile that adds electrothermal stove, and temperature-control heat couple is inserted in the temperature-controlled tube; Described safety feature adopts blasting piece device.
The aforesaid autoclave device that is used for the nuclear material static corrosion test, it is provided with water supplement port, dewatering outlet and sample tap at autoclave body bottom.
The aforesaid autoclave device that is used for the nuclear material static corrosion test, it is provided with the sampling four-way at autoclave body bottom, and four interfaces of sampling four-way are respectively connector, water supplement port, dewatering outlet and sample tap; Connector links to each other with adapter at the bottom of the still by the attaching nut, and water supplement port, dewatering outlet, sample tap are connected with water compensating valve, water drain valve, sample valve respectively; Described sample tap also links to each other with stopple coupon one end, and the adapter other end placed in the still chamber at the bottom of stopple coupon passed still.
The aforesaid autoclave device that is used for the nuclear material static corrosion test, described sample tap is the concentric circles sleeve type structure, and its inner sleeve is short pipe, and stopple coupon inserts this weak point pipe endoporus, is connected with short pipe melting welding at short pipe end stopple coupon; The outer sleeve inner wall of sample tap is a circular conical surface, outer wall is for connecting pin thread, the endoporus of the spherical joint of sample valve is inserted in short pipe cylindrical, and the sphere of spherical joint is connected being threaded of pin thread by gland nut and outer wall, and compresses sealing with the outer sleeve inner wall circular conical surface.
The aforesaid autoclave device that is used for the nuclear material static corrosion test is provided with water supplement port, dewatering outlet and bottom temperature-measuring port at autoclave body bottom.
The aforesaid autoclave device that is used for the nuclear material static corrosion test, it is provided with the thermometric four-way at autoclave body bottom, and four interfaces of thermometric four-way are respectively connector, water supplement port, dewatering outlet and temperature-measuring port; Connector links to each other with adapter at the bottom of the still by the attaching nut, and water supplement port, dewatering outlet are connected with water compensating valve, water drain valve respectively, and in the temperature-measuring port and the welding of temperature tube one end of thermometric four-way bottom, the adapter other end placed in the still chamber at the bottom of temperature tube passed still.
Aforesaid any autoclave device that is used for the nuclear material static corrosion test, described kettle are the high-pressure seamless stainless steel pipe and the welded structure of docking of stainless steel end socket.
Aforesaid any autoclave device that is used for the nuclear material static corrosion test, it adopts program controlled mode control test temperature.
Effect of the present invention is: the autoclave device that is used for the nuclear material static corrosion test of the present invention, to the hermetically-sealed construction of existing nuclear material corrosion test with autoclave, fastener, kettle structure, safety feature, sampling structure, the design of aspects such as temperature control system is unreasonable, the not good parts of performance have been done change, make that the more compact structure of autoclave device is reasonable, it is superior that performance more becomes, manipulate simple, and it is easy to manufacture, with low cost, safe and reliable, can easily simulate nuclear power station one, the working condition of secondary circuit carries out saturation water medium steady in a long-term and the test of the high temperature pressure corrosion under the superheated vapour medium.
Description of drawings
Fig. 1 is the autoclave apparatus structure synoptic diagram that is used for the nuclear material static corrosion test;
Fig. 2 four-way structural representation of taking a sample;
Fig. 3 thermometric four-way structural representation.
1. blasting piece devices among the figure; 2. tensimeter; 3. air release; 4. venting four-way; 5. heat-removal bar; 6. trip bolt; 7. handle; 8. the big nut formula screws device; 9. large washer; 10. kettle cover; 11. tommy; 12. temperature thermocouple; 13. temperature tube; 14. specimen mounting; 15. kettle; 16. add electrothermal stove; 17. temperature-control heat couple; 18. temperature-controlled tube; 19. inner cylinder; 20. heat-insulation layer; 21. shell; 22A. stopple coupon; 22B. temperature tube; 23A. sampling four-way; 23B. thermometric four-way; 24. bolt; 25. water compensating valve; 26. water drain valve; 27. refrigeratory; 28. sample valve; 29. take at the bottom of the still; 30. attaching nut; 31. bottom temperature thermocouple.
Embodiment
Below in conjunction with accompanying drawing the autoclave device that is used for the nuclear material static corrosion test of the present invention is specifically described:
As shown in Figure 1, the autoclave device that is used for the nuclear material static corrosion test of the present invention is formed a pressure vessel by kettle cover 10 and kettle 15, and kettle 15 is fixed on the shell 21 by 4 bolts 24 of bottom.Be with one at the kettle outer wall and add electrothermal stove 16, its heating power is 4KW, is used for the intensification of autoclave.In order to reduce the thermal loss of electric furnace, in the shell 21 that adds electrothermal stove 16 peripheries, also be filled with certain thickness super glass wool heat-insulation layer 20.
Heat-removal bar 5 is housed on kettle cover 10, and heat-removal bar 5 links to each other with air release 3, tensimeter 2, blasting piece device 1 respectively by venting four-way 4.Kettle cover 10 adopts ball conical surface line to contact hard sealing with kettle 15, is provided with the guiding neck in kettle cover 10 lower ends, is provided with tommy 11 on kettle 15 end faces suitable for reading.Kettle cover 10 screws device 8 with kettle 15 by the big nut formula and compresses.Fastening by 8 trip bolts 6 that the big nut formula screws on the device 8, give tight power to produce sealing.
Be provided with sampling four-way 23A at autoclave body bottom, sampling four-way 23A structure as shown in Figure 2.Sampling four-way 23A has four interfaces, is respectively connector, water supplement port, dewatering outlet and sample tap.Connector links to each other with adapter 29 at the bottom of the still by attaching nut 30.Water supplement port, dewatering outlet, sample tap are connected with water compensating valve 25, water drain valve 26, sample valve 28 respectively, can open and close respectively when needing, and implement its required function.Sample tap also links to each other with stopple coupon 22A one end, and stopple coupon 22A passes and takes over 29 other ends at the bottom of the still and place in the still chamber.Described sample tap is the concentric circles sleeve type structure, and its inner sleeve is short pipe, and stopple coupon 22A inserts this weak point pipe endoporus, is connected with short pipe melting welding at short pipe end stopple coupon 22A; The outer sleeve inner wall of sample tap is a circular conical surface, and outer wall is for connecting pin thread, and the endoporus of the spherical joint of sample valve 28 is inserted in short pipe cylindrical, and the sphere of spherical joint compresses sealing by gland nut and outer sleeve inner wall circular conical surface.
According to need of work, aforesaid autoclave device, the sampling four-way 23A that is provided with in kettle 15 bottoms can be replaced and be connected to thermometric four-way 23B, and thermometric four-way 23B structure and connected mode and sampling four-way 23A are similar, as shown in Figure 3.Four interfaces of thermometric four-way 23B are respectively connector, water supplement port, dewatering outlet and temperature-measuring port.Connector links to each other with adapter 29 at the bottom of the still by attaching nut 30.Water supplement port, dewatering outlet are connected with water compensating valve 25, water drain valve 26 respectively, can open and close respectively when needing, and implement its required function.Temperature-measuring port in thermometric four-way 23B bottom is connected with temperature tube 22B one end melting welding, and temperature tube 22B passes and takes over 29 other ends at the bottom of the still and place in the still chamber.Bottom temperature thermocouple 31 inserts by the temperature-measuring port of thermometric four-way 23B bottom, and is positioned in the temperature tube 22B.
Autoclave device of the present invention, kettle are the high-pressure seamless stainless steel pipe and the welded structure of docking of stainless steel end socket, and it also adopts program controlled mode control test temperature.
The autoclave device that is used for the nuclear material static corrosion test of the present invention, earlier (conductivity 〉=500,000 Ω-cm) is cleaned kettle 15 and kettle cover 10 with deionized water in use, in the bottom of kettle cover 10 specimen mounting 14 is housed, the sample of some by＜1: the requirement of 1.5 surface to volume ratios is hung earlier on specimen mounting 14, and about 3.7 liters test(ing) medium of packing in kettle 15 (contains Li
+2ppm, the deionized water that B 1000～1200ppm) adds 400ml simultaneously again (obtains through a large amount of tests, for reaching the deoxygenation water yield of operating required discharge of venting deaerating effect), kettle cover 10 is put into along the direction of guiding neck, and the location positioning of aiming at tommy 11, be inserted in the large washer 9 big nut formula of screwing on again and screw device 8, the big nut formula screws device 8 and tightens clockwise, be screwed to run into large washer 9 after, return 1/4～1/2 circle again, the main thread that screws device 8 with assurance big nut formula is not at high temperature killed with the main thread of kettle 15, presses symmetrical balance, progressively Jia Li requirement is tightened the big nut formula with torque-indicating wrencg and is screwed 8 trip bolts 6 on the device 8.The screw-down torque of each trip bolt generally is controlled in the scope of 3.5kg-m～4kg-m, tightens the back temperature thermocouple and inserts temperature tube.The energising heating, come the experiment with measuring temperature by temperature thermocouple, control the working temperature of autoclave by program control system, when treating that still is warmed up to 105 ℃ and 120 ℃, by carrying out the deoxygenation operation through the qualified venting deoxygenation technology of substantive test, after the deoxygenation operation is finished, can be warmed up to the desired operating mode of test.Programming rate should be controlled at≤and 2 ℃/minute, heating rate is too slow, and the heating-up time is long; Programming rate is too fast, because the thermal inertia of equipment is bigger, easily makes the equipment overtemperature, can carry out long-term corrosion test automatically after reaching the desired temperature of test, pressure.The control system of this device is provided with the overpressure protection system, when the superpressure that equipment causes because of overtemperature, can cut off heating power supply automatically; when if pressure continues the maximum working pressure (MWP) of the equipment of rising to the Western Paradise; the automatic explosion of rupture disk in the blasting piece device 1, the safety of equipment is guaranteed in the dump release.
Autoclave device of the present invention, provide a kind of simple in structure, easy to operate, easy to manufacture, with low cost, safe and reliable, can simulate nuclear power station High Temperature High Pressure working environment 1. maximum operating temperature be that 360 ℃ ± 1 ℃, working pressure are the saturated deionized water medium of 18.7MPa; 2. working temperature be 400 ℃ ± 3 ℃, working pressure be 10.3MPa ± 0.7MPa the superheated vapour medium 3. useful volume be the autoclave of 5 liters.
Effect to autoclave device of the present invention further describes below:
When adopting spring safety valve as the superpressure safety relief device at existing autoclave device, because of the volume of spring safety valve bigger, and release pressure is difficult for accurately control, be difficult for sealing etc. again after returning seat, often take place to leak to make to test and interrupt, the present invention has adopted blasting piece device 1 to be safety feature, has solved the gas leakage problem, and compact conformation, burst pressure accurately, change conveniently, guaranteed the safe and reliable of equipment.Blasting piece device 1 is made up of base, pad, rupture disk, trim ring, connection outlet, clamping nut etc.Heat-removal bar 5 is used for heat radiation and reduces vapor (steam) temperature, and air release 3, tensimeter 2, the blasting piece device 1 on top are operated under the lower temperature.
Adopt the sealing of tongue and groove red copper plain cushion at the sealing of existing autoclave kettle cover and kettle, it is required that to give tight power big, after kettle cover 10 of the present invention contacts with kettle 15 employing ball conical surface lines and seals firmly, reduce sealing and given tight power, reduce the volume and weight of kettle cover, be provided with guiding neck guiding simultaneously in the kettle cover lower end, on kettle end face suitable for reading, be provided with tommy 11 location, guarantee the repeatability and the reliability of kettle cover and kettle line contact sealing position, save the processing and fabricating of red copper plain washer.
Fastener at existing autoclave is a flange form, volume is bigger, because kettle cover of the present invention adopts ball conical surface line to contact hard sealing with kettle, thus the corresponding structure that changes big-nut wrenching device 8 into of fastener of the present invention, this fastener compact conformation, mounting or dismounting, fastening convenience, give tight power and reduce, the size of trip bolt is also greatly reduced, alleviated labor intensity of operating personnel, be convenient to control the tight power of giving of each trip bolt, make the stressed evenly sealing easily of kettle cover with torque-indicating wrencg.
If carry out the material screening test of design phase, often to carry out accelerated corrosion test, this moment test(ing) medium chlorinty and oxygen level, the multiple of the order of magnitude is improved in the capital than nominal situation, like this when carrying out the material screening test, kettle and temperature tube also will be subjected to accelerated corrosion, kettle is because of its wall thickness, can not influence and continue to use, and the integrality of the temperature tube that wall approaches will be affected, damage for fear of temperature tube, under some ambient condition, insert the thermopair in temperature tube and the temperature-controlled tube respectively, after the temperature contrast test of finishing short-term, can remove the temperature tube in the kettle, equipment can carry out long-term high temperature and pressure test reliably with the thermopair in the temperature-controlled tube.
Because of the requirement of nuclear power generating equipment material static corrosion test is working temperature, pressure and the water quality of simulation nuclear power station one, secondary circuit, wherein water quality requirement Cl
-≤ 0.1ppm, O
2≤ 0.1ppm is in order to reach O
2The requirement of≤0.1ppm need be carried out the deoxygenation operation when on-test, for whether chlorion and the oxygen level that detects in the water meets the demands, after the deoxygenation technological operation finishes, sampling and testing, and do not have stopple coupon in the existing autoclave, does not reach this requirement.Autoclave of the present invention is provided with sample tap in kettle 15 bottoms, has solved the key issue of this control water quality; The dewatering outlet that is provided with not only can be used as the usefulness that discharges water when the cold conditions cleaning equipment, and makes autoclave under the working condition of High Temperature High Pressure operation, after external refrigeratory cooling, can directly discharge water; The water supplement port that is provided with is connected the usefulness that also can not stop the still moisturizing with the high pressure water charging system.In addition, when being set to the bottom temperature-measuring port in kettle 15 bottoms, the zone of constant temperature in the time of can recording autoclave easily and work under High Temperature High Pressure is for the reasonable placement scope of confirmed test sample provides reliable foundation.
Kettle at existing autoclave adopts monoblock type, though intensity height, safe and reliable, but the processing charges material, take a lot of work, problem such as difficulty is big, autoclave device of the present invention is the high-pressure seamless stainless steel pipe and the welded structure of docking of stainless steel end socket, the intensity and the safety of kettle had both been guaranteed, material-saving, saving of labor have reduced difficulty of processing again.
Adopt the test temperature of PID (ratio, integration, differential) mode opertaing device at existing autoclave, the precision of temperature control is ± 3 ℃, autoclave of the present invention adopts program controlled mode control test temperature, the stability and the precision of temperature control have been improved, for the aqueous medium test, temperature-controlled precision can reach ± and 1 ℃, can also set working time of test simultaneously easily, equipment is stopped transport automatically.
The record of temperature, pressure data in the process of the test, adopt the manual record mode at existing autoclave device, the present invention adopts EX-II type recording instrument without paper record, data can be tabulated or various display packings such as diagram show, output after mini-printer is printed, and by being connected, can store with host computer, demonstration, disposal data.Make the state of equipment running process more directly perceived, reflect more credibly.
Claims (8)
1. autoclave device that is used for the nuclear material static corrosion test, comprise kettle cover (10) and kettle (15), be with at kettle (15) outer wall and add electrothermal stove (16), on kettle cover (10), be provided with heat-removal bar (5), heat-removal bar (5) links to each other with air release (3), tensimeter (2), safety feature respectively, temperature thermocouple (12) is inserted in the temperature tube (13) on the kettle cover (10), it is characterized in that:
Kettle cover (10) adopts ball conical surface line to contact hard sealing with kettle (15), is provided with the guiding neck in kettle cover (10) lower end, is provided with tommy (11) on kettle (15) end face suitable for reading;
Kettle cover (10) compresses by big-nut wrenching device (8) with kettle (15), and big-nut wrenching device (8) is provided with several trip bolts (6);
Temperature-controlled tube (18) is arranged in the tile that adds electrothermal stove (16), and temperature-control heat couple (17) is inserted in the temperature-controlled tube (18);
Described safety feature adopts blasting piece device (1).
2. the autoclave device that is used for the nuclear material static corrosion test according to claim 1 is characterized in that: be provided with water supplement port, dewatering outlet and sample tap in kettle (15) bottom.
3. the autoclave device that is used for the nuclear material static corrosion test according to claim 2, it is characterized in that: be provided with sampling four-way (23A) in kettle (15) bottom, four interfaces of sampling four-way (23A) are respectively connector, water supplement port, dewatering outlet and sample tap; Connector links to each other with taking over (29) at the bottom of the still by attaching nut (30), and water supplement port, dewatering outlet, sample tap are connected with water compensating valve (25), water drain valve (26), sample valve (28) respectively; Described sample tap also links to each other with stopple coupon (22A) end, and adapter (29) other end placed in the still chamber at the bottom of stopple coupon (22A) passed still.
4. the autoclave device that is used for the nuclear material static corrosion test according to claim 3, it is characterized in that: described sample tap is the concentric circles sleeve type structure, its inner sleeve is short pipe, stopple coupon (22A) inserts this weak point pipe endoporus, is connected with short pipe melting welding at short pipe end stopple coupon (22A); The outer sleeve inner wall of sample tap is a circular conical surface, outer wall is for connecting pin thread, the endoporus of the spherical joint of sample valve (28) is inserted in short pipe cylindrical, and the sphere of spherical joint is connected being threaded of pin thread by gland nut and outer wall, and compresses sealing with the outer sleeve inner wall circular conical surface.
5. the autoclave device that is used for the nuclear material static corrosion test according to claim 1 is characterized in that: be provided with water supplement port, dewatering outlet and bottom temperature-measuring port in kettle (15) bottom.
6. the autoclave device that is used for the nuclear material static corrosion test according to claim 5, it is characterized in that: be provided with thermometric four-way (23B) in kettle (15) bottom, four interfaces of thermometric four-way (23B) are respectively connector, water supplement port, dewatering outlet and temperature-measuring port; Connector links to each other with adapter (29) at the bottom of the still by attaching nut (30), water supplement port, dewatering outlet are connected with water compensating valve (25), water drain valve (26) respectively, in the temperature-measuring port and the welding of temperature tube (22B) end of thermometric four-way (23B) bottom, adapter (29) other end placed in the still chamber at the bottom of temperature tube (22B) passed still.
7. according to any described autoclave device that is used for the nuclear material static corrosion test of claim 1 to 6, it is characterized in that: described kettle (15) is the dock welded structure of high-pressure seamless stainless steel pipe with the stainless steel end socket.
8. according to any described autoclave device that is used for the nuclear material static corrosion test of claim 1 to 6, it is characterized in that: this autoclave device adopts program controlled mode control test temperature.
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| CNB2006101408827A CN100442043C (en) | 2006-10-13 | 2006-10-13 | High-pressure pot device for muclear electric material static corrosion test |
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| CN100442043C true CN100442043C (en) | 2008-12-10 |
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| CN101865816A (en) * | 2010-05-28 | 2010-10-20 | 北京科技大学 | Experimental apparatus for high-temperature high-pressure loop spray corrosion simulation and electrochemical testing |
| CN102279080B (en) * | 2011-03-30 | 2013-03-27 | 苏州宝骅机械技术有限公司 | Performance test device for sealing gasket of nuclear power equipment |
| CN102288504B (en) * | 2011-07-22 | 2013-03-27 | 中国科学院金属研究所 | High-temperature high-pressure in-situ scratching and corrosive wear test device |
| CN103163028A (en) * | 2011-12-12 | 2013-06-19 | 德尔福电子(苏州)有限公司 | Method for testing performance change of material after being soaked in high-temperature transmission oil |
| CN104568722A (en) * | 2015-01-23 | 2015-04-29 | 中国核动力研究设计院 | Corrosion testing device under supercritical state |
| CN106198372A (en) * | 2016-08-17 | 2016-12-07 | 华电电力科学研究院 | Corrosion-proof high-temp high-pressure kettle system |
| CN107578834A (en) * | 2017-09-12 | 2018-01-12 | 浙江伦特机电有限公司 | Nuclear power plant is special can core pulling quick response thermometer |
| CN111151214B (en) * | 2020-02-28 | 2022-05-20 | 威海化工机械有限公司 | Reation kettle for quick-open type static corrosion test |
| CN112903575A (en) * | 2021-01-17 | 2021-06-04 | 西南石油大学 | Multifunctional high-temperature high-pressure reaction kettle |
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