CN102864793A - Test device for simulating permafrost region well heat insulation or heating - Google Patents
Test device for simulating permafrost region well heat insulation or heating Download PDFInfo
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- CN102864793A CN102864793A CN2012101969672A CN201210196967A CN102864793A CN 102864793 A CN102864793 A CN 102864793A CN 2012101969672 A CN2012101969672 A CN 2012101969672A CN 201210196967 A CN201210196967 A CN 201210196967A CN 102864793 A CN102864793 A CN 102864793A
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Abstract
The invention relates to a test device for simulating permafrost region well heat insulation or heating. The test device is characterized in that a test tank is a circular interlayer barrel body consisting of an outer ring, an inner ring, a top plate and a bottom plate, a soil body is filled in an interlayer, a refrigerating liquid circulation passage is arranged inside the top plate and the bottom plate, is connected with a refrigerating temperature control device and is in contact with the soil body, water is filled in a water tank, the water tank is arranged in the test tank, a heat insulation barrel is placed between the water tank and the test tank, heat insulation covers are placed on and under the water tank, a water replenishing device is connected with a water tank bottom plate through a water replenishing pipe, a water pressure gauge is arranged on the water replenishing pipe, a water pumping device is connected with a water tank top cover through a water pumping pipe, the water pumping pipe is inserted into water of the water tank, a flow meter is arranged on the water pumping pipe, a heating temperature control device is connected with a heating pipe through a conducing wire, the heating pipe is inserted into the water of the water tank, and temperature sensors are arranged in the solid body and the water of the water tank and are respectively connected with a digital collecting instrument. The test device has the advantages that the permafrost region well is simulated, the reasonable well diameter, the water pumping speed, the heat insulation thickness and the power of a heating device are obtained, and the goals of energy saving and environment protection are reached.
Description
Technical field
The present invention relates to a kind of experimental rig of simulating the insulation of Permafrost Area well or heating.
Background technology
When Permafrost Area carries out engineering construction or life, must provide water, but these areas are in frozen state throughout the year, especially to winter, the world of ice and snow is difficult to find the water source that does not freeze everywhere.Fortunately, below the ever-frozen ground layer of certain thickness (several meters to rice up to a hundred), may exist and not freeze water, be called infrapermafrost water, draw water by well-digging, the water source can be provided.Yet, still exist some problems to need to solve.Infrapermafrost water did not freeze originally, when passing through the ever-frozen ground layer in the pump process, and meeting and frozen soil layer generation interchange of heat, temperature reduces, thereby may freeze, and water be can't pump out.Therefore need to take certain measure, for example around well, add insulation layer or place heater in the well the inside, not exclusively freeze with the water that guarantees the well the inside.The possibility that steeping in water for reconstitution life in the well is freezed is relevant with on-the-spot hydrogeological conditions and Adopts measure, such as the hydraulic pressure of the thickness of ever-frozen ground layer and temperature, infrapermafrost water, well diameter, pump-out, the speed of drawing water, the thickness of insulation layer, the power of heater etc.In addition, in Permafrost Area, the energy is very valuable, also will consider energy-conservation requirement when well is taken measures.
Need to carry out simulated test before the well-digging, according to the hydrogeological conditions at scene, research obtains rational well diameter, the speed of drawing water, insulation layer thickness, heater power etc.Therefore, seek a kind of can simulate Permafrost Area well water pumping process and insulation is set or the model test apparatus of heater very necessary, also be scientific and technical personnel, engineers and technicians' problem demanding prompt solution.
Summary of the invention
The Practical Project problem that well-digging is drawn water for Permafrost Area, purpose of the present invention aim to provide a kind of experimental rig of simulating the insulation of Permafrost Area well or heating.In the device, soil body material is contained in the test tank, and the test tank base plate that is connected with the refrigeration temperature regulating device contacts with the soil body with top board, makes cooling soil body, thus the open-air roadbed on permafrost site of simulation.Water pot is placed on test tank inside, and links to each other with water plug with water replanishing device, the pump process of simulation well.According to the test needs, at water pot outer setting heat-preserving container or in water pot, place heating tube, insulation or heating measure that the simulation well is taked in pump process.
The object of the present invention is achieved like this:
A kind of experimental rig of simulating the insulation of Permafrost Area well or heating contains sample carrier outer ring, test tank inner ring, test tank top board, test tank base plate, freezing liquid circulation canal, the first refrigeration temperature regulating device, the second refrigeration temperature regulating device, the soil body, water pot, heat-preserving container, insulation cover, filling pipe, water replanishing device, water pressure gauge, drinking-water pipe, water plug, flow meter, heating tube, heating and temperature controlling device, the first temperature pick up and the second temperature pick up, data collecting instrument.Test tank is a circular interlayer staving that is made of sample carrier outer ring, sample carrier inner ring, sample carrier top board and sample carrier base plate, fill the soil body in the interlayer, test tank top board and sample carrier base plate interior have the freezing liquid circulation canal, and link to each other with the second refrigeration temperature regulating device with the first refrigeration temperature regulating device respectively, the sample carrier top board all contacts with the soil body with the sample carrier base plate; Water pot is the integral body of a sealing, water pot the inside dress water, water pot is placed on sample carrier inner ring the inside, places heat-preserving container between water pot and the sample carrier inner ring, water pot is placed up and down insulation cover, water replanishing device links to each other with the water pot base plate by filling pipe, and water pressure gauge is set on the filling pipe, and water plug links to each other with the water pot top cover by drinking-water pipe, in the water in the drinking-water pipe insertion water pot, flow meter is set on the drinking-water pipe, and heating and temperature controlling device links to each other with heating tube by wire, in the water in the heating tube insertion water pot; Diverse location arranges the first temperature pick up in the soil body, and the second temperature pick up is set in the water in the water pot, and the first temperature pick up links to each other with data collecting instrument respectively with the second temperature pick up, the temperature of the monitoring soil body and the temperature of water.
Above-mentioned test tank outer ring, test tank inner ring, water pot are to be made by epoxy resin; Test tank top board and base plate are to be made by almag.
The beneficial effect of advantage of the present invention and generation is:
1, according to actual requirement of engineering, simulate neatly different-diameter well, consider different soil body scopes, take the insulation layer of different-thickness.
2, by simulated test, according to the hydrogeological conditions of on-the-spot roadbed on permafrost site, research obtains the power of rational well diameter, the speed of drawing water, insulation layer thickness, heater etc.Guaranteed to dig a well smoothly, draw water at Permafrost Area on the one hand, the water source is provided, on the other hand, guaranteed the energy minimum that institute's Adopts measure consumes, reached the purpose of energy-saving and environmental protection.
3, can simulate field condition, use solar panels to provide power supply as heating and temperature controlling device and data collecting instrument, thereby select rational solar cell.
Description of drawings
Fig. 1 is schematic perspective view of the present invention.
Fig. 2 is the vertical section schematic diagram of Fig. 1.
Fig. 3 is sample tank bottom and top board front view among Fig. 1.
Fig. 4 is sample tank bottom and the inner freezing liquid circulation canal of top board top view among Fig. 3.
Fig. 5 is sample tank bottom schematic surface among Fig. 1.
Wherein: 1 first refrigeration temperature regulating device; 2-sample carrier top board; 3-soil body; 4-flow meter; 5-drinking-water pipe; 6-insulation cover; 7-heating and temperature controlling device; 8-data collecting instrument; The 9-the first temperature pick up; 10-water replanishing device; 11-test tank outer ring; 12-water pressure gauge; 13-filling pipe; 14-freezing liquid circulation canal; 15-heating tube; The 16-the second temperature pick up; 17-water; 18-water pot; 19-heat-preserving container; 20-test tank base plate; The 21-the second refrigeration temperature regulating device; 22-water plug; 23-test tank inner ring
The specific embodiment
The soil body material 3 that the present invention uses is the soil directly got from the scene or is added a kind of material that forms after water stirs by fine grained soil or more coarse grained rubble according to on-the-spot geological conditions; The water 17 that uses is the underground water of directly getting from the scene or the water that contains certain mineral matter that disposes according to on-the-spot hydrologic condition.
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described again:
As shown in Figure 1-Figure 3, a kind of experimental rig that can simulate the insulation of Permafrost Area well or heating contains test tank outer ring 11, test tank inner ring 23, test tank top board 2, test tank base plate 20, freezing liquid circulation canal 14, the first refrigeration temperature regulating device 1 and the second refrigeration temperature regulating device 21, the soil body 3, water pot 18, water 17, heat-preserving container 19, insulation cover 6, filling pipe 13, water replanishing device 10, water pressure gauge 12, drinking-water pipe 5, water plug 22, flow meter 4, heating tube 15, heating and temperature controlling device 7, the first temperature pick up 9 and the second temperature pick up 16, data collecting instrument 8.Test tank is a circular interlayer staving that is made of sample carrier outer ring 11, sample carrier inner ring 23, sample carrier top board 2 and sample carrier base plate 20.The inner ring 23 of test tank outer ring 11 and test tank epoxy resin poor by heat conductivility, that intensity is high is made; Top board 2 and the test tank base plate 20 of test tank are made by the almag of good heat conductivity, test tank top board 2 and test tank base plate 20 inside have double helix annular runner as freezing liquid circulation canal 14, and test tank top board 2 links to each other with the second refrigeration temperature regulating device 21 with the first refrigeration temperature regulating device 1 by pipeline respectively with test tank base plate 20; The dress soil body 3 between test tank outer ring 11 and the test tank inner ring 23, the first refrigeration temperature regulating device 1 and the second refrigeration temperature regulating device 21 freezing liquid after to freezing liquid refrigeration, cooling flow into test tank top board 2 and test tank base plate 20 inside double helix annular runner 14, test tank top board 2 contacts with the soil body 3 with test tank base plate 20 and interchange of heat occurs, thereby make the soil body 3 temperature reduce the roadbed on permafrost site of simulated field.Water pot 18 is the sealing integral body that the epoxy resin poor by heat conductivility, that intensity is high is made, and comprises sidewall, base plate and top cover.Water is filled with 18 and is placed test tank inner ring 23 the insides, and water is filled with 18 the insides dress water 17, can simulate the well of beating at roadbed on permafrost site.Water replanishing device 10 links to each other with water pot 18 base plates by filling pipe 13, and water pressure gauge 12 is set on the filling pipe 13, is used for monitoring hydraulic pressure.Water plug 22 links to each other with water pot 18 top covers by drinking-water pipe 5, in the water 17 that drinking-water pipe 5 inserts in the water pot 18, flow meter 4 is set on the drinking-water pipe 5, is used for the flow velocity that monitoring is drawn water.Water replanishing device 10, water plug 22, water pot 18 link together and can simulate the pump process of well.Between water pot 18 and the test tank inner ring 23 heat-preserving container 19 is set, water pot base plate and top cover outside arrange insulation cover 6, thus the Insulation in the simulation well pump process.Heating tube 15 inserts in the water 17 in the water pots 18, and links to each other with heating and temperature controlling device 7 by wire, simulates the heating measure in the well pump process.The first temperature pick up 9 and the second temperature pick up 16 be laid in the soil body 3 and water 17 in the diverse location place, the temperature of the Real-Time Monitoring soil body 3 and water 17.
The groove (such as accompanying drawing 4) of different-diameter is carved with on the surface of test tank base plate 20, cooperates water pot 18, test tank outer ring 11 and the test tank inner ring 23 of different-diameter, the heat-preserving container 19 of different-thickness to use.During test, select the water pot 18 of certain diameter according to the well diameter of simulating, be placed on the test tank base plate 20, then select certain thickness heat-preserving container 19 according to the Insulation of intending taking, be placed into water pot 18 outsides, again test tank inner ring 23 is inserted on the test tank base plate 20, last, select the test tank outer ring 11 of certain diameter and be inserted on the test tank base plate 20 according to the soil body scope of intending considering.Like this, just can simulate the soil body of the well of different-diameter, the insulation layer that adopts different-thickness, consideration different range.
Claims (2)
1. can simulate the experimental rig that the Permafrost Area well is incubated or heats for one kind, contain sample carrier outer ring (11), test tank inner ring (23), test tank top board (2), test tank base plate (20), freezing liquid circulation canal (14), refrigeration temperature regulating device (1), the second refrigeration temperature regulating device (21), the soil body (3), water pot (18), heat-preserving container (19), insulation cover (6), filling pipe (13), water replanishing device (10), water pressure gauge (12), drinking-water pipe (5), water plug (22), flow meter (4), heating tube (15), heating and temperature controlling device (7), the first temperature pick up (9) and the second temperature pick up (16), data collecting instrument (8), it is characterized in that test tank is by sample carrier outer ring (11), sample carrier inner ring (23), the circular interlayer staving that sample carrier top board (2) and sample carrier base plate (20) consist of, fill the soil body (3) in the interlayer, test tank top board (2) and sample carrier base plate (20) inside have freezing liquid circulation canal (14), and link to each other with the second refrigeration temperature regulating device (21) with the first refrigeration temperature regulating device (1) respectively, sample carrier top board (2) all contacts with the soil body (3) with sample carrier base plate (20); Water pot (18) is the integral body of a sealing, water pot (18) the inside dress water (17), water pot (18) is placed on sample carrier inner ring (23) the inside, place heat-preserving container (19) between water pot (18) and the sample carrier inner ring (23), water pot (18) is placed up and down insulation cover (6), water replanishing device (10) links to each other with water pot (18) base plate by filling pipe (13), water pressure gauge (12) is set on the filling pipe (13), water plug (22) links to each other with water pot (18) top cover by drinking-water pipe (5), drinking-water pipe (5) inserts in the inner water (17) of water pot (18), flow meter (4) is set on the drinking-water pipe (5), heating and temperature controlling device (7) links to each other with heating tube (15) by wire, and heating tube (15) inserts in the inner water (17) of water pot (18); The interior diverse location of the soil body (3) arranges the first temperature pick up (9), in the inner water (17) of water pot (18) the second temperature pick up (16) is set, the first temperature pick up (9) links to each other with data collecting instrument (8) respectively with the second temperature pick up (16), the temperature of the monitoring soil body (3) and the temperature of water (17).
2. by experimental rig of simulating the insulation of Permafrost Area well or heating claimed in claim 1, it is characterized in that above-mentioned test tank outer ring (11), test tank inner ring (23), water pot (18) are to be made by epoxy resin, test tank top board (2) and base plate (20) are to be made by almag.
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| CN201210196967.2A CN102864793B (en) | 2012-06-15 | 2012-06-15 | Test device for simulating permafrost region well heat insulation or heating |
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| CN201210196967.2A CN102864793B (en) | 2012-06-15 | 2012-06-15 | Test device for simulating permafrost region well heat insulation or heating |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433309A (en) * | 2013-08-20 | 2013-12-11 | 首钢总公司 | Device for controlling and simulating cooling rate of high-speed Steyr air cooling line |
| CN103469832A (en) * | 2013-09-24 | 2013-12-25 | 中国建筑东北设计研究院有限公司 | Foundation pit frozen soil test chamber |
| CN103835707A (en) * | 2013-12-06 | 2014-06-04 | 北京中煤矿山工程有限公司 | Large model test device simulating deep vertical shaft freezing |
| CN104297451A (en) * | 2014-10-23 | 2015-01-21 | 石家庄铁道大学 | Large-grain-size soil body frost heaving performance testing device |
| CN104831763A (en) * | 2015-06-03 | 2015-08-12 | 石家庄铁道大学 | Frost heaving prevention performance test experiment device and method for pile body |
| CN106018756A (en) * | 2016-08-09 | 2016-10-12 | 中国科学院寒区旱区环境与工程研究所 | Thermal insulation test box with functions of water supplement at bottom and temperature control |
| CN106049564A (en) * | 2016-08-01 | 2016-10-26 | 辽宁工程职业学院 | Detecting device for detecting concrete foundation bearing deformation |
| CN108643860A (en) * | 2018-04-12 | 2018-10-12 | 中国人民解放军陆军工程大学 | The antifreeze method of tundra deep well and antifreeze deep well |
| CN109838238A (en) * | 2019-02-18 | 2019-06-04 | 中铁第四勘察设计院集团有限公司 | Forced thaw device and method for subway frozen construction |
| CN110331945A (en) * | 2019-03-27 | 2019-10-15 | 中国石油大学(华东) | Polar region drilling platforms derrick Heat preservation experimental provision and experimental method |
| CN115266810A (en) * | 2022-08-03 | 2022-11-01 | 哈尔滨工业大学 | Hot rod roadbed frost heaving test device |
| CN116927232A (en) * | 2023-09-13 | 2023-10-24 | 启东晶尧光电科技有限公司 | Pile foundation structure of photovoltaic power station and pile foundation construction process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1945165A (en) * | 2006-10-31 | 2007-04-11 | 张延军 | Direct buried underground heat exchanger of engineering abandored water lowering well |
| JP2008088763A (en) * | 2006-10-04 | 2008-04-17 | Hiroaki Ebina | Two-well type underground water heat exchange system and construction method of two-well type underground water heat exchange system |
| CN101424087A (en) * | 2007-10-31 | 2009-05-06 | 中国科学院寒区旱区环境与工程研究所 | Insulation and collecting well |
| CN102183537A (en) * | 2011-03-04 | 2011-09-14 | 中国科学院寒区旱区环境与工程研究所 | Constant-temperature temperature-control test box |
-
2012
- 2012-06-15 CN CN201210196967.2A patent/CN102864793B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088763A (en) * | 2006-10-04 | 2008-04-17 | Hiroaki Ebina | Two-well type underground water heat exchange system and construction method of two-well type underground water heat exchange system |
| CN1945165A (en) * | 2006-10-31 | 2007-04-11 | 张延军 | Direct buried underground heat exchanger of engineering abandored water lowering well |
| CN101424087A (en) * | 2007-10-31 | 2009-05-06 | 中国科学院寒区旱区环境与工程研究所 | Insulation and collecting well |
| CN102183537A (en) * | 2011-03-04 | 2011-09-14 | 中国科学院寒区旱区环境与工程研究所 | Constant-temperature temperature-control test box |
Non-Patent Citations (1)
| Title |
|---|
| 寇立国等: "自记水位井防冻方法的探讨", 《东北水利水电》, no. 10, 31 December 2010 (2010-12-31), pages 13 - 14 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433309A (en) * | 2013-08-20 | 2013-12-11 | 首钢总公司 | Device for controlling and simulating cooling rate of high-speed Steyr air cooling line |
| CN103433309B (en) * | 2013-08-20 | 2015-07-15 | 首钢总公司 | Device for controlling and simulating cooling rate of high-speed Steyr air cooling line |
| CN103469832A (en) * | 2013-09-24 | 2013-12-25 | 中国建筑东北设计研究院有限公司 | Foundation pit frozen soil test chamber |
| CN103469832B (en) * | 2013-09-24 | 2015-09-16 | 中国建筑东北设计研究院有限公司 | A kind of foundation pit frozen soil test chamber |
| CN103835707A (en) * | 2013-12-06 | 2014-06-04 | 北京中煤矿山工程有限公司 | Large model test device simulating deep vertical shaft freezing |
| CN104297451A (en) * | 2014-10-23 | 2015-01-21 | 石家庄铁道大学 | Large-grain-size soil body frost heaving performance testing device |
| CN104297451B (en) * | 2014-10-23 | 2017-02-15 | 石家庄铁道大学 | Large-grain-size soil body frost heaving performance testing device |
| CN104831763A (en) * | 2015-06-03 | 2015-08-12 | 石家庄铁道大学 | Frost heaving prevention performance test experiment device and method for pile body |
| CN106049564A (en) * | 2016-08-01 | 2016-10-26 | 辽宁工程职业学院 | Detecting device for detecting concrete foundation bearing deformation |
| CN106049564B (en) * | 2016-08-01 | 2018-01-02 | 辽宁工程职业学院 | A kind of detection means for detecting concrete foundation load metamorphism |
| CN106018756A (en) * | 2016-08-09 | 2016-10-12 | 中国科学院寒区旱区环境与工程研究所 | Thermal insulation test box with functions of water supplement at bottom and temperature control |
| CN108643860A (en) * | 2018-04-12 | 2018-10-12 | 中国人民解放军陆军工程大学 | The antifreeze method of tundra deep well and antifreeze deep well |
| CN109838238A (en) * | 2019-02-18 | 2019-06-04 | 中铁第四勘察设计院集团有限公司 | Forced thaw device and method for subway frozen construction |
| CN110331945A (en) * | 2019-03-27 | 2019-10-15 | 中国石油大学(华东) | Polar region drilling platforms derrick Heat preservation experimental provision and experimental method |
| CN115266810A (en) * | 2022-08-03 | 2022-11-01 | 哈尔滨工业大学 | Hot rod roadbed frost heaving test device |
| CN115266810B (en) * | 2022-08-03 | 2023-05-05 | 哈尔滨工业大学 | Hot rod roadbed frost heaving test device |
| CN116927232A (en) * | 2023-09-13 | 2023-10-24 | 启东晶尧光电科技有限公司 | Pile foundation structure of photovoltaic power station and pile foundation construction process |
| CN116927232B (en) * | 2023-09-13 | 2023-11-28 | 启东晶尧光电科技有限公司 | Pile foundation structure of photovoltaic power station and pile foundation construction process |
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