CN105643803A - Fine aggregate precooling device for concrete production - Google Patents
Fine aggregate precooling device for concrete production Download PDFInfo
- Publication number
- CN105643803A CN105643803A CN201510947954.8A CN201510947954A CN105643803A CN 105643803 A CN105643803 A CN 105643803A CN 201510947954 A CN201510947954 A CN 201510947954A CN 105643803 A CN105643803 A CN 105643803A
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- China
- Prior art keywords
- feed bin
- fine aggregate
- cooling feed
- concrete production
- cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
- B28C7/0023—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust by heating or cooling
- B28C7/0038—Cooling, e.g. using ice
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a fine aggregate precooling device for concrete production. The fine aggregate precooling device comprises a cooling bin, a vacuum pump, a draught fan and a refrigerating device. The vacuum pump communicates with the cooling bin. The refrigerating device communicates with the cooling bin. The draught fan is arranged in the cooling bin. The fine aggregate precooling device for concrete production has the beneficial effects of being simple in structure, convenient to operate, high in safety, low in cost and the like.
Description
Technical field
The present invention relates to concrete production field, particularly relate to a kind of concrete production fine aggregate precooling unit.
Background technology
Its starting material are cooled by so-called pre cooling of concrete exactly before mixing concrete. Concrete raw material generally includes coarse aggregate, fine aggregate, gelling material (cement, coal ash etc.), water, admixture etc. At present, aggregate is air-cooled, add sheet ice and cold water to mix and stir be the conventional pre-refrigeration technique of precooling concrete production, in the construction of the mass concrete engineerings such as large sized hydropower station engineering, be used widely. Air-cooled of aggregate can not carry out air-cooled for coarse aggregate, fine aggregate owing to space is too little. Aggregate is air-cooled, and can be subdivided into again surface wind cold-peace batching plant air-cooled. The air-cooled need in ground arrange first cooling by wind feed bin, and first cooling by wind feed bin volume is big, Structural Design Requirement height, completion time of project are long, and reinforcing bar and built-in fitting making amount are big. Mass concrete engineering is often positioned at high-mountain gorge areas, with a varied topography, builds the levelling of the land excavation amount that a first cooling by wind feed bin does very big, further increases the priming cost of first cooling by wind. Producing sheet ice and need to arrange ice making building, ice making building complex process, equipment are many, steel construction gold knot amount is big.
In addition, aggregate is air-cooled produces cooling load relatively greatly with sheet ice, and supporting refrigerant system capacity is also relatively big, it is thus desirable to a large amount of refrigeration agent. The air-cooled supporting refrigeration system overwhelming majority of aggregate of the prior art adopts the liquefied ammonia of concentration 99.8% as refrigeration agent, fills ammonia amount generally between 10t ~ 60t. Liquefied ammonia is easy volatilization, has the hypertoxic chemical substance of intense stimulus smell, significantly adds the danger of precooling unit.
The cooling of fine aggregate once had liquid nitrogen vacuum cooling and buried water-cooled tube two kinds of modes in fine aggregate is piled, and the former becomes block by easy freezing, and the latter's slow efficiency of lowering the temperature is low, and therefore above two kinds of fine aggregate types of cooling are not no longer applied already.
Also there is no the more scientific technology cooled by the fine aggregate in concrete raw material at present. If fine aggregate can be cooled, can break through or stablize current minimum outlet temperature on the one hand, first cooling by wind feed bin or the setting in ice making building can be reduced on the other hand, namely engineering often exists such a case: after using a certain or two kinds of precooling measures, outlet temperature from design only differs from 1��2 DEG C, it is necessary to add precooling technical measures again. Such as, taking batching plant feed bin first cooling by wind, add sheet ice and cold water is mixed as precooling measure, outlet temperature only relatively design load differ from 1��2 DEG C, it is necessary to increase ground first cooling by wind more as a supplement.Therefore, if adopting fine aggregate precooling, ground first cooling by wind can be reduced, or save ice making building during employing twice wind cooling.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art, it is provided that a kind of structure is simple, easy to operate, security height and the low concrete production fine aggregate precooling unit of cost.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of concrete production fine aggregate precooling unit, comprises cooling feed bin, vacuum pump, blower fan and refrigeration plant, and described vacuum pump is connected with described cooling feed bin, and described refrigeration plant is connected with described cooling feed bin, and described blower fan is arranged in described cooling feed bin.
Further improvement as technique scheme:
Described cooling feed bin is provided with feeding unit, e Foerderanlage and drawing mechanism, described feeding unit arranges the top of described cooling feed bin first end, the bottom of described drawing mechanism and described cooling feed bin the 2nd end, described e Foerderanlage is arranged in described cooling feed bin, and butts up against between described feeding unit and drawing mechanism.
Described feeding unit comprises hopper and feed control valve, and described feed control valve arranges the lower end of described hopper.
Described drawing mechanism comprises discharge bucket and discharging control valve, and described discharging control valve is arranged on the lower end of described discharge bucket.
Described refrigeration plant comprises vaporizer, and described vaporizer is arranged in described cooling feed bin, is provided with and the drip tray of described cooling feed bin ft connection below described vaporizer.
Described vacuum pump comprises getter device, and the suction opening of described getter device is arranged in described cooling feed bin.
Compared with prior art, it is an advantage of the current invention that:
The concrete production fine aggregate precooling unit of the present invention, need to when in cooling feed bin, fine aggregate cools, first vacuum pump is started, in cooling feed bin, air is extracted out outside storehouse by vacuum pump, pressure in storehouse is reduced, the moisture that fine aggregate contains is rapid vaporization under low pressure environment, a large amount of heat is absorbed from fine aggregate, rapid reduction fine aggregate temperature, form water vapour after water vapor and enter air, when in cooling feed bin, pressure is reduced to target value, startup blower fan and refrigeration plant freeze, fan operation makes air at cooling feed bin internal recycle, water vapour heat exchange outside the low-temperature refrigerant and vaporizer of refrigeration plant, heat in water vapour is taken out of outside cooling material storehouse, atmospheric moisture reduces, fine aggregate surface evaporation can be accelerated again during air flow fine aggregate surface under fan action, thus reach the object cooled by fine aggregate in cooling feed bin fast, namely the present invention utilizes moisture that fine aggregate self contains as refrigeration agent, cooling ability when giving full play to water vapor, rapid reduction fine aggregate temperature, and do not need to adopt liquefied ammonia etc. as refrigeration agent, not only structure is simple, easy to operate, and security height, cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of concrete production fine aggregate precooling unit of the present invention.
In figure, each label represents:
1, feed bin is cooled; 2, vacuum pump; 21, getter device; 3, blower fan; 4, refrigeration plant; 41, vaporizer; 42, drip tray; 5, feeding unit; 51, hopper; 52, feed control valve; 6, e Foerderanlage; 7, drawing mechanism; 71, discharge bucket; 72, discharging control valve.
Embodiment
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
Fig. 1 shows a kind of embodiment of concrete production fine aggregate precooling unit of the present invention, this concrete production fine aggregate precooling unit comprises cooling feed bin 1, vacuum pump 2, blower fan 3 and refrigeration plant 4, vacuum pump 2 is connected with cooling feed bin 1, refrigeration plant 4 is connected with cooling feed bin 1, blower fan 3 is arranged in cooling feed bin 1, need to when in cooling feed bin 1, fine aggregate cools, first vacuum pump 2 is started, in cooling feed bin 1, air is extracted out outside storehouse by vacuum pump 2, pressure in storehouse is reduced, the moisture that fine aggregate contains is rapid vaporization under low pressure environment, vaporescence absorbs a large amount of heat from fine aggregate, rapid reduction fine aggregate temperature, form water vapour after water vapor and enter air, when in cooling feed bin 1, pressure is reduced to target value, startup blower fan 3 and refrigeration plant 4 freeze, blower fan 3 runs and makes air at cooling feed bin 1 internal recycle, through low-temperature refrigerant and the water vapour heat exchange of refrigeration plant 4, heat in water vapour is taken out of outside cooling material storehouse 1, in storehouse, atmospheric moisture reduces, fine aggregate surface evaporation can be accelerated again during air flow fine aggregate surface under blower fan 3 acts on, thus reach the object cooled by fine aggregate in cooling feed bin 1 fast, namely the present invention utilizes moisture that fine aggregate self contains as refrigeration agent, cooling ability when giving full play to water vapor, rapid reduction fine aggregate temperature, and do not need to adopt liquefied ammonia etc. as refrigeration agent, not only structure is simple, easy to operate, and security height, cost is low.
In the present embodiment, cooling feed bin 1 is provided with feeding unit 5, e Foerderanlage 6 and drawing mechanism 7, feeding unit 5 arranges the top of cooling feed bin 1 first end, drawing mechanism 7 and the bottom cooling feed bin 1 the 2nd end, e Foerderanlage 6 is arranged in cooling feed bin 1, and butt up against between feeding unit 5 and drawing mechanism 7, fine aggregate is delivered to the 2nd end of cooling feed bin 1 by e Foerderanlage 6 from the first end of cooling feed bin 1, fine aggregate evenly can be spread out as much as possible in cooling feed bin 1, make the cooling to fine aggregate more abundant, feeding unit 5 and e Foerderanlage 6 can non-stop runs, ensure the continuous production of precooling fine aggregate, improve production efficiency, fully meet precooling concrete production needs.
In the present embodiment, feeding unit 5 comprises hopper 51 and feed control valve 52, feed control valve 52 arranges the lower end of hopper 51, drawing mechanism 7 comprises discharge bucket 71 and discharging control valve 72, discharging control valve 72 is arranged on the lower end of discharge bucket 71, fine aggregate can be stored in hopper 51 and discharge bucket 71, and control to open or close by feed control valve 52 and discharging control valve 72 respectively, in process of production, can ensure there is certain thickness fine aggregate all the time in hopper 51 and discharge bucket 71, with the air outside isolated cooling feed bin 1.
In the present embodiment, refrigeration plant 4 comprises vaporizer 41, vaporizer 41 is arranged in cooling feed bin 1, the drip tray 42 being provided with below vaporizer 41 and cool feed bin 1 ft connection, water vapour is condensed into liquid water in the outer heat exchange surface heat release of vaporizer 41, and liquid water flows into the drip tray 42 below vaporizer 41 and discharges cooling feed bin 1.
In the present embodiment, vacuum pump 2 comprises getter device 21, and the suction opening of getter device 21 is arranged in cooling feed bin 1.
Although the present invention discloses as above with better embodiment, but and it is not used to limit the present invention. Any those of ordinary skill in the art, when not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible variations and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to the technology of the present invention essence to any simple modification made for any of the above embodiments, equivalent variations and modification, all should drop in the scope of technical solution of the present invention protection.
Claims (6)
1. a concrete production fine aggregate precooling unit, it is characterized in that: comprise cooling feed bin (1), vacuum pump (2), blower fan (3) and refrigeration plant (4), described vacuum pump (2) is connected with described cooling feed bin (1), described refrigeration plant (4) is connected with described cooling feed bin (1), and described blower fan (3) is arranged in described cooling feed bin (1).
2. concrete production fine aggregate precooling unit according to claim 1, it is characterized in that: described cooling feed bin (1) is provided with feeding unit (5), e Foerderanlage (6) and drawing mechanism (7), described feeding unit (5) arranges the top of described cooling feed bin (1) first end, the bottom of described drawing mechanism (7) and described cooling feed bin (1) the 2nd end, described e Foerderanlage (6) is arranged in described cooling feed bin (1), and butts up against between described feeding unit (5) and drawing mechanism (7).
3. concrete production fine aggregate precooling unit according to claim 2, it is characterised in that: described feeding unit (5) comprises hopper (51) and feed control valve (52), and described feed control valve (52) arranges the lower end of described hopper (51).
4. concrete production fine aggregate precooling unit according to claim 2, it is characterized in that: described drawing mechanism (7) comprises discharge bucket (71) and discharging control valve (72), and described discharging control valve (72) is arranged on the lower end of described discharge bucket (71).
5. concrete production fine aggregate precooling unit according to any one of claim 1 to 4, it is characterized in that: described refrigeration plant (4) comprises vaporizer (41), described vaporizer (41) is arranged in described cooling feed bin (1), and described vaporizer (41) lower section is provided with and the drip tray (42) of described cooling feed bin (1) ft connection.
6. concrete production fine aggregate precooling unit according to any one of claim 1 to 4, it is characterised in that: described vacuum pump (2) comprises getter device (21), and the suction opening of described getter device (21) is arranged in described cooling feed bin (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510947954.8A CN105643803B (en) | 2015-12-17 | 2015-12-17 | A kind of concrete production fine aggregate pre-cooler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510947954.8A CN105643803B (en) | 2015-12-17 | 2015-12-17 | A kind of concrete production fine aggregate pre-cooler |
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| Publication Number | Publication Date |
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| CN105643803A true CN105643803A (en) | 2016-06-08 |
| CN105643803B CN105643803B (en) | 2018-10-12 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01127302A (en) * | 1987-11-13 | 1989-05-19 | Mitsubishi Heavy Ind Ltd | Concrete kneading device with aggregate-precooler |
| JPH01198307A (en) * | 1988-02-04 | 1989-08-09 | Nikku Ind Co Ltd | Method for cooling aggregate for concrete |
| JPH03183509A (en) * | 1989-12-13 | 1991-08-09 | Mitsubishi Electric Corp | Precooling method for concrete |
| JPH04164608A (en) * | 1990-04-03 | 1992-06-10 | Ushio:Kk | Producing device of cooled green concrete |
| CN1062690A (en) * | 1990-12-27 | 1992-07-15 | 株式会社牛尾 | Apparatus for making coolable concrete |
| CN201573284U (en) * | 2009-12-22 | 2010-09-08 | 中国水利水电第七工程局有限公司 | Air-cooled aggregate warehouse |
| US20120279424A1 (en) * | 2011-05-04 | 2012-11-08 | Boral Stone Products Llc | Direct batch aggregate vacuum saturation for mixing concrete |
| CN103180114A (en) * | 2010-07-29 | 2013-06-26 | 琳得科有限两合公司 | Mobile apparatus and method for producing concrete with cooling of bulk material |
| CN204054347U (en) * | 2014-07-31 | 2014-12-31 | 中国水利水电第八工程局有限公司 | Outputting Pre-cooling Concrete produces aggregate air cooler |
| CN205238299U (en) * | 2015-12-17 | 2016-05-18 | 中国水利水电第八工程局有限公司 | Concrete production fine aggregate precooling apparatus |
-
2015
- 2015-12-17 CN CN201510947954.8A patent/CN105643803B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01127302A (en) * | 1987-11-13 | 1989-05-19 | Mitsubishi Heavy Ind Ltd | Concrete kneading device with aggregate-precooler |
| JPH01198307A (en) * | 1988-02-04 | 1989-08-09 | Nikku Ind Co Ltd | Method for cooling aggregate for concrete |
| JPH03183509A (en) * | 1989-12-13 | 1991-08-09 | Mitsubishi Electric Corp | Precooling method for concrete |
| JPH04164608A (en) * | 1990-04-03 | 1992-06-10 | Ushio:Kk | Producing device of cooled green concrete |
| CN1062690A (en) * | 1990-12-27 | 1992-07-15 | 株式会社牛尾 | Apparatus for making coolable concrete |
| CN201573284U (en) * | 2009-12-22 | 2010-09-08 | 中国水利水电第七工程局有限公司 | Air-cooled aggregate warehouse |
| CN103180114A (en) * | 2010-07-29 | 2013-06-26 | 琳得科有限两合公司 | Mobile apparatus and method for producing concrete with cooling of bulk material |
| US20120279424A1 (en) * | 2011-05-04 | 2012-11-08 | Boral Stone Products Llc | Direct batch aggregate vacuum saturation for mixing concrete |
| CN204054347U (en) * | 2014-07-31 | 2014-12-31 | 中国水利水电第八工程局有限公司 | Outputting Pre-cooling Concrete produces aggregate air cooler |
| CN205238299U (en) * | 2015-12-17 | 2016-05-18 | 中国水利水电第八工程局有限公司 | Concrete production fine aggregate precooling apparatus |
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| CN105643803B (en) | 2018-10-12 |
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