CN100398482C - Underground pipe heat exchanger drilling hole refilling material - Google Patents
Underground pipe heat exchanger drilling hole refilling material Download PDFInfo
- Publication number
- CN100398482C CN100398482C CNB2006100438083A CN200610043808A CN100398482C CN 100398482 C CN100398482 C CN 100398482C CN B2006100438083 A CNB2006100438083 A CN B2006100438083A CN 200610043808 A CN200610043808 A CN 200610043808A CN 100398482 C CN100398482 C CN 100398482C
- Authority
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- China
- Prior art keywords
- heat exchanger
- buried pipe
- present
- refiller
- water
- 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.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 title claims abstract description 57
- 238000005553 drilling Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000006004 Quartz sand Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims description 19
- 239000010881 fly ash Substances 0.000 claims description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000013530 defoamer Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 239000011435 rock Substances 0.000 abstract description 4
- 238000004378 air conditioning Methods 0.000 abstract description 3
- 239000011083 cement mortar Substances 0.000 abstract description 2
- 229910000278 bentonite Inorganic materials 0.000 abstract 1
- 239000000440 bentonite Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000004035 construction material Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 5
- 239000004570 mortar (masonry) Substances 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 230000000740 bleeding effect Effects 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The present invention discloses a refiller material (2) of a drilled hole for a heat exchanger with a buried pipe underground, which belongs to the technical field of construction materials, more specifically a refiller material of the buried pipe underground for an air conditioning system of a ground-source heat pump. The present invention is composed of 100 of gelled materials, 200 to 250 of quartz sand, 0.05 to 0.1 of antifoams, 1 to 2 of bentonite, and 0.2 to 2 of slushing agents, which are added with water and stirred uniformly in a construction site of the buried pipe underground, and are charged into the drilled hole then. The present invention can improve the thermal conductivity of the refiller material, and the working performance, the impermeability, the endurance, the binding degree with the buried pipe and a drilled hole wall, the economy and the endurance of the refiller material can be improved. The present invention does not have pollution for environment. When the refiller material of cement mortar of the present invention is adopted, the length of the buried pipe of the heat exchanger with the buried pipe can be reduced. Particularly the heat exchanger with the buried pipe underground which is arranged in a stratum of a hard rock, the thermal conductivity of a rock formation is large, and the drilling cost of unit depth is high. The present invention can be adopted because the present invention has the effect that the cost of the heat exchanger with the buried pipe underground is obviously reduced.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of ground pipe laying backfilling material that is applied in the geothermal heat pump air-conditioning system.
Background technology
Ground pipe laying earth source heat pump heat supplying air conditioning technology is just receiving increasing concern owing to it is energy-conservation with characteristics environmental protection.Backfill is the important step in the ground heat exchanger construction process, promptly finishes in boring, down behind the intact U type pipe, injects backfilling material in boring.It is between the pipe laying and drill hole wall of ground heat exchanger; be used for strengthening pipe laying and the heat exchange of ground on every side; prevent that the surface water from passing through boring to underground infiltration, is not subjected to the pollution of face of land pollutent with protection underground water, and prevents the crossed contamination between each aqueous stratum.The selection of backfilling material and correct backfill construction have important meaning for the performance that guarantees ground heat exchanger.Usually the grouting backfilling material that adopts mostly is the mixed pulp of wilkinite and fine sand (or cement) at present, the thermal conductivity of this backfill is less, has only 0.65-0.9W/m.K, and the easy dry shrinkage of this wilkinite backfilling material, dry and cracked, therefore the thermal conductivity at the regional this backfilling material of drying can fall very for a short time, and cause the increase of thermal contact resistance owing to dewatering, can produce serious negative impact conducting heat.Adopt the bad backfilling material of heat conductivility will enlarge markedly the interior thermal resistance of boring, under same condition, cause required boring total length to increase, also mean the increase of system's initial cost and working cost simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of have thermal conductive resin, workability, the impervious ground heat exchanger boring backfilling material that reaches good characteristics such as not shrinking, adopt these backfilling materials can save the length of ground heat exchanger, reach the effect that reduces the ground heat exchanger initial cost, be a significant benefit to further applying of this energy-conserving and environment-protective project of geothermal heat pump air-conditioner technology.
The ground pipe laying backfilling material that the present invention proposes is made up of cement, flyash, quartz sand, defoamer, wilkinite, water reducer, and the weight ratio of each component is:
Gelling material (concrete and coal ash): 100 (flyash account for gelling material weight 0～40%)
Quartz sand: 200～250
Defoamer: 0.05～0.1
Wilkinite: 1～2
Water reducer: 0.2～2
The preferable weight ratio of each component is:
Gelling material (concrete and coal ash): 100 (flyash account for gelling material weight 0～40%)
Quartz sand: 200～230
Defoamer: 0.05～0.1
Wilkinite: 1.5～2
Water reducer: 0.5～1.5
The said backfilling material using method of the present invention is: at the backfill construction scene, by aforementioned each each component of part by weight weighing, raw material is mixed and add the entry back that stirs inject buried pipe bit hole by physical mechanical.Amount of water accounts for the 50%---60% (water-cement ratio) of gelling material weight in the backfilling material.Also can prepare pack in proportion, be transported to the working-yard and add water by water-cement ratio and stir and to inject buried pipe bit hole.
The said backfilling material of the present invention is with heat transferred U type pipe in the stratum and the circulatory mediator in the pipe, perhaps with the important step on the heat transferred stratum in U type pipe and the circulatory mediator.It is a heat transmission medium, at first requires it to have good heat-conducting; Secondly, backfilling material also will have good operation, and certain intensity, impermeability and do not shrink etc.
Above-mentioned workability is meant that reflection newly mixes the performance of sand-cement slurry construction complexity, is meant that the sand-cement slurry mixture can keep its component even, be easy to transportation, cast,
Construction operations such as reality, moulding, and can obtain even, the closely knit performance of quality.Comprise two aspect implications: flowability and water-retentivity.Flowability is meant the mortar mixture under deadweight or external force effect, can produce and flow and even, the closely knit ability that is full of model.Water-retentivity is meant that the mortar mixture has the ability of certain self-restraint internal moisture, the performance of the serious bleeding of unlikely generation in construction process.The performance of this two aspect has reflected the construction complexity of mixture from different sides.
The present invention is taking all factors into consideration the thermal conductivity of sand-cement slurry, workability, workability, impermeability, intensity, is not shrinking and factor such as economy the each component weight ratio that optimizes by experiment.Make a concrete analysis of as follows:
Portland cement produces hydrated product as other component generation hydration reaction in inorganic gel material and the backfilling material, and the sclerosis back produces intensity, hole wall in the boring and ground pipe laying are combined closely, and be the basic material of the said backfilling material of the present invention.
The flyash that adds in the backfilling material is the uncombusted inorganic residues after the pulverized coal in power plant burning, and fused uncombusted particle is discharged from smelting furnace with flue gas, and the cooling back is captured by fly-ash separator.The chemical constitution of flyash is similar to the chemical ingredients of clay, mainly comprises SiO
2, Al
2O
3, Fe
2O
3, CaO and unburnt carbon.Mix flyash in cement, can reduce the water consumption of cement, this is an obvious superiority of flyash.Smooth evengranular being dispersed between the cement microparticle in the flyash can effectively be reduced water-absorbent and internal friction, thereby strengthens density, improves impervious.And, the gelling content of backfilling material being increased because flyash proportion is less, water cement ratio increases thereupon, thereby good fluidity, helps pumping, has improved its workability.In addition, flyash can reduce hydration heat.A large amount of flyash will discharge every year in coal-fired station, and contaminate environment has taken tract, so flyash is dirt cheap, even can freely use.
Quartz sand is a kind of have better heat conductivility relatively economical and aggregate of obtaining easily again, can improve the sand-cement slurry backfilling material thermal conductivity, workability, intensity, performance such as do not shrink.
Water reducer is used for improving the rheological of sand-cement slurry as a kind of concrete admixture, reduces water cement ratio, improves weather resistance.And reduce porosity after water cement ratio can reduce cement mortar solidification, thus its thermal conductivity can be improved, and improve other physical mechanical characteristic.
Wilkinite makes backfilling material that rheological and water-retentivity preferably be arranged as mortar thickening agent, latex stablizer.Wilkinite as swelling property, adsorptivity, dispersiveness, rheological, plasticity-, cohesiveness, colloidality, thixotropy, resistivity against fire, oilness etc., can also reduce bleeding because its unique mineral structure and crystal chemistry character have many good performances.Bleeding is that solid particulate sinks under action of gravity, thereby one deck water can occur on its surface when newly mixing sand-cement slurry water retention capacity deficiency.Bleeding can destroy the inner homogeneity of mortar, and the surface produces the crack in the time of can causing mortar to solidify when serious.
Adding water by 50～60% of gelling material weight in the backfilling material at the scene when the present invention uses stirs into slurry and injects buried pipe bit hole.
The present invention can improve the thermal conductivity of backfilling material as the backfilling material in buried pipe bit hole, improve its workability, impermeability, intensity, with combination degree, economy, the weather resistance of pipe laying and drill hole wall, environmentally safe.When adopting sand-cement slurry backfilling material of the present invention, can reduce the pipe laying length of ground heat exchanger.Particularly for the ground heat exchanger that is provided with in the stratum of solid rock, the thermal conductivity of rock stratum is big, and the boring expense height of unit depth adopts sand-cement slurry backfilling material of the present invention to have the effect of tangible reduction ground heat exchanger cost.
Embodiment
Embodiment 1, and ground heat exchanger boring backfilling material weight ratio is by gelling material 100 (wherein ordinary Portland cement (PO32.5R) 60, flyash 40), quartz sand 213, defoamer (organosilicon NFX) 0.1, wilkinite (sodium base) 2, water reducer (naphthalene is NF-B) 1.5 is formulated.Adding water by 60% of gelling material weight during site operation stirs into slurry and injects buried pipe bit hole.Its thermal conductivity is 2.21W/ (m.K), thermal diffusivity 0.86mm
2/ s, specific heat 2.56MJ/ (m
3.K), denseness 10.7cm, rate of expansion 0.02%, folding strength 2.2-5.0MPa, ultimate compression strength 4.8-20.7MPa.
Embodiment 2, and ground heat exchanger boring backfilling material weight ratio is pressed ordinary Portland cement (PO32.5R) 100, quartz sand 200, and defoamer (organosilicon NFX) 0.05, wilkinite (sodium base) 1.1, water reducer (naphthalene is NF-B) 1.5 is formulated.Adding water by 50% of gelling material weight during site operation stirs into slurry and injects buried pipe bit hole.Its thermal conductivity is 2.19W/ (m.K), thermal diffusivity 0.97mm
2/ s, specific heat 2.27MJ/ (m
3.K), denseness 10.8cm, rate of expansion 0.03%, folding strength (28d) 8.2MPa, ultimate compression strength (28d) 22.4Mpa.
Claims (3)
1. a ground heat exchanger boring backfilling material is characterized in that being made up of gelling material, quartz sand, defoamer, wilkinite and water reducer, and wherein, gelling material is made up of cement and flyash, and the weight ratio of each component is:
Gelling material: 100, wherein, flyash accounts for 0～40% of gelling material weight;
Quartz sand: 200～250;
Defoamer: 0.05～0.1;
Wilkinite: 1～2;
Water reducer: 0.2～2.
2. ground heat exchanger boring backfilling material according to claim 1 is characterized in that the weight ratio of each component is: gelling material: 100, and wherein, flyash accounts for 0～40% of gelling material weight;
Quartz sand: 200～230;
Defoamer 0.05～0.1;
Wilkinite: 1.5～2;
Water reducer: 0.5～1.5.
3. the using method of a ground heat exchanger as claimed in claim 1 boring backfilling material is characterized in that adding the water of gelling material weight 50%～60% in this backfilling material, stirs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100438083A CN100398482C (en) | 2006-04-17 | 2006-04-17 | Underground pipe heat exchanger drilling hole refilling material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100438083A CN100398482C (en) | 2006-04-17 | 2006-04-17 | Underground pipe heat exchanger drilling hole refilling material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1868959A CN1868959A (en) | 2006-11-29 |
| CN100398482C true CN100398482C (en) | 2008-07-02 |
Family
ID=37442761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100438083A Expired - Fee Related CN100398482C (en) | 2006-04-17 | 2006-04-17 | Underground pipe heat exchanger drilling hole refilling material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100398482C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104514218A (en) * | 2013-09-30 | 2015-04-15 | 清华大学 | Energy pile and system thereof |
| CN104016605B (en) * | 2014-05-28 | 2015-10-14 | 付占一 | Earth source heat pump vertically lotus root pipe efficiently backfills heat exchange agent and its preparation method and application |
| CN104402349A (en) * | 2014-10-23 | 2015-03-11 | 山东建筑大学 | Ground-source heat pump ground-buried pipe backfill material and preparation method thereof |
| CN104478347A (en) * | 2014-11-11 | 2015-04-01 | 湖北洁能工程技术开发公司 | Ground source heat pump buried pipe isolation backfill grouting material |
| CN105174860A (en) * | 2015-08-21 | 2015-12-23 | 徐德龙 | High thermal conductive cementing material capable of enhancing heat exchange performance of heat exchange system of floor heating |
| CN106278018B (en) * | 2016-07-31 | 2018-12-07 | 山东圣克莱尔新能源有限公司 | Composite material and its construction method for backfilling earth source heat pump underground penstock |
| CN106986593B (en) * | 2017-04-07 | 2019-04-19 | 山东建筑大学 | A kind of preparation method of earth source heat pump drilling backfilling material |
| CN111410480A (en) * | 2020-03-31 | 2020-07-14 | 中国能源建设集团华北电力试验研究院有限公司 | Mixed filler formula for heat transfer of ground heat exchanger |
| CN113105190A (en) * | 2021-04-27 | 2021-07-13 | 上海城建物资有限公司 | Pipe periphery backfill material suitable for flexible pipeline and preparation method and backfill method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6251179B1 (en) * | 1999-03-23 | 2001-06-26 | The United States Of America As Represented By The Department Of Energy | Thermally conductive cementitious grout for geothermal heat pump systems |
| US6711862B1 (en) * | 2001-06-07 | 2004-03-30 | Composite Technologies, Corporation | Dry-cast hollowcore concrete sandwich panels |
-
2006
- 2006-04-17 CN CNB2006100438083A patent/CN100398482C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6251179B1 (en) * | 1999-03-23 | 2001-06-26 | The United States Of America As Represented By The Department Of Energy | Thermally conductive cementitious grout for geothermal heat pump systems |
| US6711862B1 (en) * | 2001-06-07 | 2004-03-30 | Composite Technologies, Corporation | Dry-cast hollowcore concrete sandwich panels |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1868959A (en) | 2006-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shandong Sanming International Machinery Co., Ltd. Assignor: Shandong Construction University Contract record no.: 2011370000091 Denomination of invention: Backfill to buried pipe heat exchanger through hole Granted publication date: 20080702 License type: Exclusive License Open date: 20061129 Record date: 20110414 |
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| ASS | Succession or assignment of patent right |
Owner name: JIANGSU LIANZHONG CASING FILM CO., LTD. Free format text: FORMER OWNER: SHANDONG CONSTRUCTION UNIVERSITY Effective date: 20130822 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 250010 JINAN, SHANDONG PROVINCE TO: 226500 NANTONG, JIANGSU PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130822 Address after: 226500, Rugao City, Jiangsu province Nantong City, such as Huimin Road No. 666 Patentee after: Jiangsu Lianzhong Casing Co., Ltd. Address before: Fengming Road District of Ji'nan City, Shandong province 250010 port development Shandong Jianzhu University Patentee before: Shandong Construction University |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080702 Termination date: 20190417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |