CN203502409U - Pressure chamber for tester with high temperature expansibility and permeability - Google Patents

Pressure chamber for tester with high temperature expansibility and permeability Download PDF

Info

Publication number
CN203502409U
CN203502409U CN201320659675.8U CN201320659675U CN203502409U CN 203502409 U CN203502409 U CN 203502409U CN 201320659675 U CN201320659675 U CN 201320659675U CN 203502409 U CN203502409 U CN 203502409U
Authority
CN
China
Prior art keywords
upper cover
pressure chamber
base
stainless steel
steel piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201320659675.8U
Other languages
Chinese (zh)
Inventor
谢敬礼
刘月妙
宗自华
曹胜飞
赵星光
马利科
马超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Research Institute of Uranium Geology
Original Assignee
Beijing Research Institute of Uranium Geology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Research Institute of Uranium Geology filed Critical Beijing Research Institute of Uranium Geology
Priority to CN201320659675.8U priority Critical patent/CN203502409U/en
Application granted granted Critical
Publication of CN203502409U publication Critical patent/CN203502409U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model belongs to the research field of highly radioactive waste geological disposal experiments, and in particular relates to a pressure chamber for a tester with the high temperature expansibility and permeability. The pressure chamber is used for overcoming the shortcomings of large volume, heavy weight, inconvenience in operation and the like of an existing pressure chamber. The pressure chamber comprises a base, an upper cover arranged above the base, a sample ring arranged between the base and the upper cover, and a stainless steel piston arranged above the upper cover, wherein a water inlet channel connected with a water inlet pipe connector is arranged on one side surface of the lower part of the base; the sample ring is hollow and is internally provided with a test sample; a metal water-permeable plate is arranged on the test sample, the height of the top of the metal water-permeable plate is level to the height of the sample ring; a round groove is formed in the bottom of the upper cover, the sample ring is covered by the upper cover; a cylindrical hole is formed in the middle of the upper cover; the stainless steel piston is inserted into the hole, and the lower end of the stainless steel piston is contacted with the metal water-permeable plate above the test sample. Due to the adoption of the pressure chamber, the lightweight design is realized, and the expansibility can be accurately measured conveniently.

Description

Pressure chamber for high-temperature expansion and perviousness analyzer
Technical field
The utility model belongs to high-level waste geological disposal experimental study field, is specifically related to a kind of pressure chamber for high-temperature expansion and perviousness analyzer.
Background technology
The high radioactivity nuclear waste of China intends adopting the mode of the dark geological disposal of multibarrier (geologic medium belongs to the natural cover for defense, and refuse body, the gentle refunds underfill material of packing container etc. belongs to engineering barrier) to dispose.Padded coaming is as the important component part of disposing multibarrier system in storehouse, it is last road artificial barrier being filled between dedicated waste tanks and geologic body, playing the vital role such as engineering barrier, hydraulics barrier, chemical barrier, conduction and lost radioactive waste decay heat, is the effective guarantee of geological disposal storehouse safety and stability.By domestic and international research in recent years, the bentonitic clay that the smectite of take is principal ingredient is considered to the most suitable buffering backfilling material of high level radioactive waste repository.The underground water of disposing in the country rock of storehouse permeates to disposing in storehouse under the effect of high pressure groundwater flow, bentonitic clay is met water moisture absorption and is caused soil expansion distortion, forms in resistance barrier country rock underground water and infiltrates fast and dispose in storehouse and cause the artificial barrier that nuclein migration and radiation are spread.The performances such as therefore, the expansion of research bentonitic clay under various conditions especially high temperature, high hydraulic condition, infiltration are significant.
Microcomputer control high-temperature expansion and perviousness analyzer (Chinese patent ZL200920154214.9) are for studying different temperatures, different intake pressure, different exhaust conditions and the bentonitic bulging force of different compacted density and infiltration coefficient, realized the integrated of bulging force mensuration and osmotic coefficient investigating, Automatic Control, temperature, hydraulic pressure control scope are large, good stability.But there are some shortcomings in the pressure chamber that in use finds this equipment: volume, weight are large, inconvenient operation; Sealing means friction force is large, can not accurately measure bulging force; Water flowing out structure is unreasonable etc.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, and a kind of pressure chamber for high-temperature expansion and perviousness analyzer is provided.
The technical scheme that realizes the utility model object is:
A pressure chamber for high-temperature expansion and perviousness analyzer, is characterized in that: comprise base, at the upper cover above base, in the sample ring between base and upper cover and be positioned at the stainless steel piston above upper cover; Described base lower side is provided with the water inlet duct being connected with admitting pipe joint; In the middle of described base top, be provided with two circular grooves, big groove is placed sample loop, places a metal porous disc in little groove, and described metal porous disc is placed in top, described water inlet duct; Described sample loop hollow, built-in test specimen, places a metal porous disc above described test specimen, and described metal porous disc overhead height is concordant with sample loop height; Circular groove is arranged at described upper cover bottom, covers on sample loop; There is cylindrical hole at described upper cover middle part, and in stainless steel piston patchhole and lower end contacts with the metal porous disc of test specimen top.
A kind of pressure chamber for high-temperature expansion and perviousness analyzer as above, wherein: described stainless steel piston middle part diameter is larger than bottom, between middle part outshot and upper cover, is provided with O-ring seal.
A kind of pressure chamber for high-temperature expansion and perviousness analyzer as above, wherein: on described stainless steel piston, cover has pressure transducer, described pressure transducer is fastening by bolt and upper cover, and pressure transducer bottom sensitive surface contacts with stainless steel piston middle part outshot.
A kind of pressure chamber for high-temperature expansion and perviousness analyzer as above, wherein: described stainless steel piston base and sidewall are provided with hole, base apertures communicates with areole, and areole communicates with the water outlet duct in upper cover, and described water outlet duct integral body is downward-sloping.
A kind of pressure chamber for high-temperature expansion and perviousness analyzer as above, wherein: the base apertures top of described stainless steel piston communicates with Temperature Humidity Sensor hole, Temperature Humidity Sensor is provided with Temperature Humidity Sensor in hole, and Temperature Humidity Sensor hole is positioned at top, water outlet duct.
A kind of pressure chamber for high-temperature expansion and perviousness analyzer as above, wherein: described sample loop bottom surface and base contact position and sample loop end face and upper cover contact position are respectively provided with the O-ring seal of an O type, O-ring seal adopts fluororubber.
A kind of pressure chamber for high-temperature expansion and perviousness analyzer as above, wherein: described base and upper cover are by bolted, and described admitting pipe joint is connected with water inlet system.
Effect of the present utility model is: it has realized light-weight design, adopts new sealing means and fastening means, and has improved position and the working method of pressure transducer and Temperature Humidity Sensor.Specific as follows:
(1) a kind of pressure chamber for high-temperature expansion and perviousness analyzer described in the utility model, use the mode of bolted to replace screw-tightened, and pressure chamber's main body becomes base and upper cover two parts from base, pressure chamber's body, upper cover three parts, the volume and weight of pressure chamber is all significantly reduced, simple to operation.
(2) improve the fixed form of pressure transducer, the pressure transducer that was originally hidden in upper cover inside has been secured by bolts in to upper tops, at pressure transducer, damaged when maybe needing to demarcate, examining and determine easy disassembly.
(3) pressure chamber of high-temperature expansion and perviousness analyzer realizes the sealing between piston and upper cover by the O-ring seal between jam-packed piston and piston hole wall, the bulging force of sample could pass to pressure transducer by piston after need to overcoming the friction force between O-ring seal and upper cover piston hole wall, this has not only caused inaccurate that bulging force measures, and also cannot be recorded to test initial stage sample bulging force progress curve hour simultaneously.Pressure chamber described in the utility model, improved the design of stainless steel piston, by the mode of piston press seal circle, realize the sealing between piston and upper cover, eliminated the friction between O-ring seal and upper cover piston hole wall, realize the accurate measurement of bulging force, and can access the Complete Curve of bulging force development.
(4) the pressure indoor temperature and humidity sensor hole of existing high-temperature expansion and perviousness analyzer and water outlet duct are positioned at the both sides of pressure chamber, the opposed design of tilting, lower openings is all pressed close to sample, the water that is penetrated into sample upper surface need to be filled ability outflow pressure chamber behind full these two holes, enter water outlet measuring system, this not only causes and cannot accurately measure the water yield, and makes Temperature Humidity Sensor long period of soaking in aqueous water, loses the function of measuring humiture.Water outlet duct, pressure chamber described in the utility model is positioned at the below in Temperature Humidity Sensor hole and is communicated with it, when not affecting temperature and humidity measurement, avoided the shunting of current direction Temperature Humidity Sensor hole, use measure of water more accurate, and guarantee that Temperature Humidity Sensor does not contact aqueous water.
(5) be for Accurate Determining aquifer yield equally, water outlet duct, pressure chamber described in the utility model is downward-sloping, the aqueous water that oozes out sample upper surface can enter out measuring system by water outlet duct as early as possible, the state of saturation that is conducive to Measurement accuracy aquifer yield and assessment sample, this is particularly important when the extremely low high compacting bentonitic clay sample of infiltration coefficient is tested.
Accompanying drawing explanation
The structural representation of a kind of pressure chamber for high-temperature expansion and perviousness analyzer that Fig. 1 provides for the utility model;
The work schematic diagram of a kind of pressure chamber for high-temperature expansion and perviousness analyzer that Fig. 2 provides for the utility model;
In figure: 1. base; 2. sample ring; 3. stainless steel piston; 4. upper cover; 5. duct intakes; 6. admitting pipe joint; 7. metal porous disc; 8. test specimen; 9. O-ring seal; 10. king-bolt; 12. pressure transducers; 13. stove bolts; 14. water outlet ducts; 15. Temperature Humidity Sensors; 16. water outlet measurement mechanisms; 17. water inlet systems; 18. motors.
Embodiment
A kind of pressure chamber for high-temperature expansion and perviousness analyzer the utility model being provided below in conjunction with drawings and Examples is further described.
As shown in Figure 1, a kind of pressure chamber for high-temperature expansion and perviousness analyzer, main part comprises base 1, at the upper cover 4 above base 1, in the sample ring 2 between base 1 and upper cover 4 and be positioned at the stainless steel piston 3 above upper cover 4, these ingredients adopt large, the corrosion resistant stainless steel of rigidity to make.Base 1 lower side is provided with into water duct 5, and water inlet duct 5 is connected with admitting pipe joint 6, and admitting pipe joint 6 is for connecting water inlet system 17; Base has two circular grooves in the middle of 1 top, and big groove is placed sample loop 2, places a metal porous disc 7 in little groove, and this metal porous disc 7 is placed in into 5 tops, water duct; Sample loop 2 hollows, be used for placing test specimen 8, test specimen 8 is placed a metal porous disc 7 above, and metal porous disc 7 overhead heights are highly concordant with sample loop 2, the bottom surface of sample loop 2 and end face respectively have the O-ring seal 9 of an O type, contact respectively with base 1 with upper cover 4; O-ring seal 9 adopts fluororubber to make, and high temperature resistant, good springiness, can bear certain crimp, and anti-sealing flows out from the gap of sample loop 2 and base 1 and upper cover 4; Base 1 is fastening by king-bolt 10 with upper cover 4, and circular groove is arranged at upper cover 4 bottoms, covers on sample loop 2; There is cylindrical hole at upper cover 4 middle parts, and stainless steel piston 3 inserts in this cylindrical hole and lower end contacts with metal porous disc 7; Stainless steel piston 3 middle part diameters are larger than bottom, by middle part outshot press seal circle 9, realize the sealing between stainless steel piston 3 and upper cover 4; Pressure transducer 12 is enclosed within on stainless steel piston 3, fastening by stove bolt 13 and upper cover 4, and its bottom sensitive surface contacts with stainless steel piston 3 middle part outshots; Stainless steel piston 3 bottoms and sidewall are provided with hole, and base apertures communicates with areole, and areole communicates with the interior water outlet of upper cover 4 duct 14, and water outlet duct 14 is whole downward-sloping; Stainless steel piston 3 base apertures tops communicate with Temperature Humidity Sensor hole, and Temperature Humidity Sensor hole is used for installing Temperature Humidity Sensor 15; Temperature Humidity Sensor hole is positioned at 14 tops, water outlet duct.
Fig. 2 is the work schematic diagram for the pressure chamber of high-temperature expansion and perviousness analyzer, the concrete operation steps of implementing is: first, compacting soil sample, in the situation that sample dry density and diameter have been determined, taking the soil of determining quality take and obtain highly the test specimen 8 as 10mm, the soil weighing up is put into sample ring 2, uses special mould, compressing on pressing machine.Sample ring 2 is put into the groove of base 1, selected the metal porous disc 7 of proper height to be placed on test specimen 8 tops, make metal porous disc 7 upper surfaces concordant with sample ring 2 upper surfaces.Sample ring 2 upper and lower surfaces are respectively put the O-ring seal 9 of a fluororubber O-type.Use king-bolt 10 fastening seats 1 and upper cover 4, compress the O-ring seal 9 of sample ring 2 upper and lower surfaces, anti-sealing flows out from sample ring 2 and the gap of base 1 and upper cover 4.Stainless steel piston 3 is inserted to the piston hole of upper cover 4, an O-ring seal 9 is placed in the below of stainless steel piston 3 middle part outshots, pressure transducer 12 is enclosed within on stainless steel piston 3, with stove bolt 13, pressure transducer 12 is tightened, sensitive surface contact stainless steel piston 3 upper surfaces of pressure transducer 12, press seal circle 9, prevents that the water that sees through test specimen 8 from flowing out from the gap of stainless steel pistons 3 and upper cover 4 simultaneously.Temperature Humidity Sensor 15 is inserted to Temperature Humidity Sensor hole, pressure chamber's installation.Pressure chamber is put into temperature control system, by admitting pipe joint 6, connect water inlet system 17, titting water outlet connects water outlet measurement mechanism 16, starts test.During on-test, temperature control system is set as to a certain steady temperature, the water pressure that applies 1MPa to water inlet system 17 by motor 18 is to pressure chamber's injection test water.Test specimen 8 in sample ring 2 is met water and is started to expand, and extruding stainless steel piston 3, passes to pressure transducer 12 by bulging force.The humidity for the treatment of test specimen 8 upper surfaces that record by Temperature Humidity Sensor 15 reaches more than 98%, and water outlet measurement mechanism 16 is when having collected and being recorded to stable aquifer yield, can think that test specimen 8 is saturated.By the inflow of seepage flow overtesting sample 8 transversal section in certain hour interval, according to Darcy's law, calculate the saturation permeability coefficient of sample; Then, regulate temperature control system rising temperature, obtain maximum swelling power and the saturation permeability coefficient of sample under another temperature conditions.The pressure chamber controlling in high-temperature expansion and perviousness analyzer (Chinese patent ZL200920154214.9) with microcomputer compares, the design of stainless steel piston 3 has been improved in improved pressure chamber described in this utility model, by the mode of stainless steel piston 3 press seal circles 9, realize the sealing of 4 of piston 3 and upper covers, eliminate the friction force between O-ring seal 9 and upper cover 4 piston hole walls, realized the accurate measurement of bulging force; Water outlet duct 14 is positioned at the below in Temperature Humidity Sensor hole and is communicated with it, has avoided current direction Temperature Humidity Sensor hole shunting when not affecting temperature and humidity measurement, uses measure of water more accurate, and guarantees that Temperature Humidity Sensor 15 does not contact aqueous water; Water outlet duct 14 is downward-sloping, the aqueous water that oozes out test specimen 8 upper surfaces can enter water outlet measurement mechanism 16 by water outlet duct 14 as early as possible, the state of saturation that is conducive to Measurement accuracy aquifer yield and assessment sample, this is particularly important when the extremely low high compacting bentonitic clay sample of infiltration coefficient is tested.

Claims (7)

1. for a pressure chamber for high-temperature expansion and perviousness analyzer, it is characterized in that: comprise base (1), be positioned at base (1) top upper cover (4), be positioned at the sample ring (2) between base (1) and upper cover (4) and be positioned at the stainless steel piston (3) above upper cover (4); Described base (1) lower side is provided with the water inlet duct (5) being connected with admitting pipe joint (6); In the middle of described base (1) top, be provided with two circular grooves, big groove is placed sample loop (2), places a metal porous disc (7) in little groove, and described metal porous disc (7) is placed in top, described water inlet duct (5); Described sample loop (2) hollow, built-in test specimen (8), described test specimen (8) is placed a metal porous disc (7) above, and described metal porous disc (7) overhead height is highly concordant with sample loop (2); Circular groove is arranged at described upper cover (4) bottom, covers on sample loop (2); There is cylindrical hole at described upper cover (4) middle part, and in stainless steel piston (3) patchhole and lower end contacts with the metal porous disc (7) of test specimen (8) top.
2. a kind of pressure chamber for high-temperature expansion and perviousness analyzer according to claim 1, is characterized in that: described stainless steel piston (3) middle part diameter is larger than bottom, and middle part outshot and upper cover are provided with O-ring seal between (4).
3. a kind of pressure chamber for high-temperature expansion and perviousness analyzer according to claim 2, it is characterized in that: the upper cover of described stainless steel piston (3) has pressure transducer (12), described pressure transducer (12) is fastening by bolt and upper cover (4), and pressure transducer (12) bottom sensitive surface contacts with stainless steel piston (3) middle part outshot.
4. a kind of pressure chamber for high-temperature expansion and perviousness analyzer according to claim 3, it is characterized in that: described stainless steel piston (3) bottom and sidewall are provided with hole, base apertures communicates with areole, areole communicates with the water outlet duct (14) in upper cover (4), and described water outlet duct (14) is whole downward-sloping.
5. a kind of pressure chamber for high-temperature expansion and perviousness analyzer according to claim 1, it is characterized in that: the base apertures top of described stainless steel piston (3) communicates with Temperature Humidity Sensor hole, in Temperature Humidity Sensor hole, be provided with Temperature Humidity Sensor (15), and Temperature Humidity Sensor hole is positioned at top, water outlet duct (14).
6. a kind of pressure chamber for high-temperature expansion and perviousness analyzer according to claim 1, it is characterized in that: described sample loop (2) bottom surface and base (1) contact position and sample loop (2) end face and upper cover (4) contact position are respectively provided with the O-ring seal of an O type, O-ring seal adopts fluororubber.
7. a kind of pressure chamber for high-temperature expansion and perviousness analyzer according to claim 1, is characterized in that: described base (1) is with upper cover (4) by bolted, and described admitting pipe joint (6) is connected with water inlet system (17).
CN201320659675.8U 2013-10-24 2013-10-24 Pressure chamber for tester with high temperature expansibility and permeability Active CN203502409U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320659675.8U CN203502409U (en) 2013-10-24 2013-10-24 Pressure chamber for tester with high temperature expansibility and permeability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320659675.8U CN203502409U (en) 2013-10-24 2013-10-24 Pressure chamber for tester with high temperature expansibility and permeability

Publications (1)

Publication Number Publication Date
CN203502409U true CN203502409U (en) 2014-03-26

Family

ID=50333379

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320659675.8U Active CN203502409U (en) 2013-10-24 2013-10-24 Pressure chamber for tester with high temperature expansibility and permeability

Country Status (1)

Country Link
CN (1) CN203502409U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105334306A (en) * 2015-10-23 2016-02-17 西安近代化学研究所 Detachable sample cage for explosive volume expansion coefficient measuring device
CN105784925A (en) * 2014-12-26 2016-07-20 核工业北京地质研究院 Head cover device for buffer material test bench cavity
CN109655599A (en) * 2018-12-04 2019-04-19 三峡大学 A kind of bentonite inflated power of high-pressure solid-infiltration coupling test instrument and its application method
CN111610315A (en) * 2020-07-03 2020-09-01 核工业北京地质研究院 Bentonite building block single seam healing effect testing device and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105784925A (en) * 2014-12-26 2016-07-20 核工业北京地质研究院 Head cover device for buffer material test bench cavity
CN105334306A (en) * 2015-10-23 2016-02-17 西安近代化学研究所 Detachable sample cage for explosive volume expansion coefficient measuring device
CN109655599A (en) * 2018-12-04 2019-04-19 三峡大学 A kind of bentonite inflated power of high-pressure solid-infiltration coupling test instrument and its application method
CN111610315A (en) * 2020-07-03 2020-09-01 核工业北京地质研究院 Bentonite building block single seam healing effect testing device and method

Similar Documents

Publication Publication Date Title
CN203502409U (en) Pressure chamber for tester with high temperature expansibility and permeability
CN102494981B (en) Device for testing gas seepage and creepage coupling action of rocks
CN101303289B (en) High pressure solid clay pervasion test device
CN104964878A (en) Triaxial test system and method for unsaturated soil multi-field coupling
CN103398933A (en) Constant-pressure concrete permeability testing device
CN106546710B (en) Test device for measuring self-sealing and healing characteristics of engineering barrier system
CN109187213B (en) Performance simulation test method and device for concrete-high compaction bentonite combined system
CN204789158U (en) Triaxial test device of many field couplings of unsaturated soil
CN110726822B (en) Method for testing expansibility and shear strength of carbonized soil in carbonization process of magnesium oxide solidified soil
CN202210098U (en) Dynamic/dead load-seepage coupling test device for rich-water cracking rock mass
CN204255812U (en) The device for testing permeability coefficient of original state coarse-grained soil
CN111650107A (en) Multifunctional soil body infiltration and dirt intercepting capability test device
CN106706500A (en) Device for determining permeability of concrete
CN111610309A (en) Device for testing gas adsorption capacity and oxidation efficiency of soil body with controllable soil body external load
CN203224427U (en) Coarse-grained soil permeability coefficient measuring device
CN109001098A (en) A kind of instantaneous Penetration Signature tester of soil and soil infiltration characteristics calculation method
CN110702583B (en) Soil body infiltration dispersion leaching test integrated column
CN110988299A (en) Device for testing unsaturated expansive force of high-compaction bentonite assembly
CN104865131A (en) Bentonite hydraulic fracturing feature determination device
CN203909034U (en) Cracking failure simulation testing system for anti-seepage structure of compacted clay under environmental gradient action
CN211877704U (en) Device for testing interface permeability of high-compaction bentonite assembly
CN104049073A (en) Compacted clay impervious structure cracking failure simulation test system under environmental gradient action
CN209841628U (en) Geotechnical test air pressure consolidation permeameter
CN111366713A (en) Test device for simulating dry-wet cycle and freeze-thaw cycle of roadbed soil body
CN110702582A (en) Device for testing interface permeability of high-compaction bentonite assembly and application

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: Beijing nuclear North research and Development Co., Ltd.

Assignor: Beijing Geology Research Inst., Ministry of Nuclear Industry

Contract record no.: 2014110000050

Denomination of utility model: Pressure chamber for tester with high temperature expansibility and permeability

Granted publication date: 20140326

License type: Exclusive License

Record date: 20140820

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model