JPH0611488B2 - Cooling device for concrete mixing water - Google Patents
Cooling device for concrete mixing waterInfo
- Publication number
- JPH0611488B2 JPH0611488B2 JP60071224A JP7122485A JPH0611488B2 JP H0611488 B2 JPH0611488 B2 JP H0611488B2 JP 60071224 A JP60071224 A JP 60071224A JP 7122485 A JP7122485 A JP 7122485A JP H0611488 B2 JPH0611488 B2 JP H0611488B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- water tank
- tank
- gas
- gap
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 104
- 238000002156 mixing Methods 0.000 title claims description 13
- 238000001816 cooling Methods 0.000 title claims description 11
- 238000003756 stirring Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 19
- 239000007788 liquid Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000003507 refrigerant Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Description
【発明の詳細な説明】 ≪産業上の利用分野≫ この発明は、練り上がり温度の低いコンクリートを得る
ために、ミキサーに供給するコンクリート混合用水を冷
却する装置に関する。TECHNICAL FIELD The present invention relates to an apparatus for cooling concrete mixing water supplied to a mixer in order to obtain concrete having a low kneading temperature.
≪従来の技術≫ コンクリートは、暑中に製造すると練り上がり温度が高
くなり、同−コンシステンシーを得るための単位水量が
増大し、同−水セメント比とするのに要する単位セメン
ト量も増加する。また運搬中のスランプの低下も大きく
なり、単位水量，セメント量をさらに増やさなければな
らない。これは不経済であるばかりでなく、セメントの
発熱による温度上昇を増加させるし、乾燥収縮も大きく
なり、そのためクラックの発生などの欠陥を生じる可能
性が大きくなる。さらに、硬化も速くなり、打ち継ぎに
許される時間が短くなり、施工が困難となる。<< Conventional Technology >> When concrete is manufactured in the heat, the kneading temperature becomes high, the unit water amount for obtaining the same-consistency increases, and the unit cement amount required for obtaining the same-water cement ratio also increases. In addition, the drop of slump during transportation becomes large, and the unit water amount and cement amount must be further increased. This is not only uneconomical, but also increases the temperature rise due to the heat generation of the cement and increases the drying shrinkage, which increases the possibility of causing defects such as cracks. Further, the curing is quick, the time allowed for splicing is short, and the construction is difficult.
またマスコンクリートにおいては、コンクリートが熱の
不良導体であることもあって、硬化発熱に伴って内部温
度が上昇し、内部と外表面との温度差が大きくなり、表
面クラックが発生し易くなる。また外部からコンクリー
トが拘束されていると、硬化後の温度降下によつて生じ
る収縮が拘束されるので大きな引張応力が発生する。Further, in the case of mass concrete, since the concrete is a poor conductor of heat, the internal temperature rises due to heat generation during hardening, the temperature difference between the inside and the outside surface increases, and surface cracks easily occur. Further, when the concrete is restrained from the outside, the shrinkage caused by the temperature drop after hardening is restrained, so that a large tensile stress is generated.
このような理由から、暑中コンクリートやマスコンクリ
ートについては、練り上がりコンクリートの温度を低下
させる何らかの対策が必要である。For these reasons, some measures to reduce the temperature of kneaded concrete are necessary for hot concrete and mass concrete.
練り上がり温度の低いコンクリートを得るには、コンク
リート混合用水としての低温の水を使用することが効果
的である。そのため従来は、コンクリート混合用水に氷
を投入して冷却していた。To obtain concrete having a low kneading temperature, it is effective to use low-temperature water as water for mixing concrete. Therefore, conventionally, ice has been poured into concrete mixing water for cooling.
≪発明が解決しようとする問題点≫ 氷による水の冷却は、極く少量の水であれば効率が良く
実用的でもある。しかし大きなコンクリートプラントで
使用する混合用水は量が多く、水温がある程度高いと必
要温度まで冷却するのに多量の氷が必要で、製氷設備，
氷の運搬設備などが大規模なものとなり、その割には効
率良く水を冷却することができない。また、氷の融解熱
を充分に利用して水を冷却するのは簡単でなく、使用し
た氷の量に比べて計算したほど水温が下がらないのが普
通である。<< Problems to be Solved by the Invention >> Cooling of water with ice is efficient and practical if it is an extremely small amount of water. However, the amount of mixing water used in a large concrete plant is large, and if the water temperature is high to some extent, a large amount of ice is required to cool it to the required temperature.
The ice transportation equipment will be large-scaled, and the water cannot be cooled efficiently. Further, it is not easy to cool water by fully utilizing the heat of melting of ice, and it is common that the water temperature does not drop as much as calculated based on the amount of ice used.
この発明は上述した従来の問題点に鑑みなされたもので
あり、その目的は、冷却源として非常に簡便な液化ガス
を使用し、比較的小規模な設備で多量の水を効率良く冷
却することができるコンクリート混合用水の冷却装置を
提供することにある。The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to use a very simple liquefied gas as a cooling source and efficiently cool a large amount of water with a relatively small facility. It is to provide a cooling device for concrete mixing water.
≪問題点を解決するための手段≫ この発明に係るコンクリート混合用水の冷却装置は、水
槽と、この水槽の外表面との間に気体が流通する隙間を
保ってこの水槽を覆う断熱ハウジングと、用水源から上
記水槽に水を導入する取水配管系と、上記水槽内の水を
コンクリートミキサーに供給する給水配管系と、液化ガ
スを貯蔵するタンクと、このタンク内の液化ガスを上記
水槽に導いて内部の水中に噴出する液化ガス供給配管系
と、上記水槽の水を攪拌する攪拌機構と、上記液化ガス
の供給により上記水槽内上部空間に充満するガスを上記
断熱ハウジングとの上記隙間に導出し、その隙間内に上
記ガスを対流させる送風機構と、上記断熱ハウジング内
の圧力を調整する調圧弁と、上記水槽内の水温を検出す
る温度センサとによって構成されるものである。<< Means for Solving the Problems >> A cooling device for concrete mixing water according to the present invention includes a water tank, and an insulating housing that covers the water tank with a gap in which gas flows between the water tank and the outer surface of the water tank, A water intake piping system for introducing water from a water source into the water tank, a water supply piping system for supplying water in the water tank to a concrete mixer, a tank for storing liquefied gas, and a liquefied gas in the tank for guiding to the water tank. Liquefied gas supply piping system that spouts into the water inside, a stirring mechanism that stirs the water in the water tank, and the gas that fills the upper space inside the water tank by supplying the liquefied gas is led to the gap between the heat insulating housing. However, it is constituted by a blower mechanism for convection of the gas in the gap, a pressure regulating valve for adjusting the pressure in the heat insulating housing, and a temperature sensor for detecting the water temperature in the water tank. Is.
≪作 用≫ 極めて低温の液化ガスを上記水槽内の水中に噴出するこ
とで、液化ガスの潜熱および顕熱によって水を急激に冷
却することができる。上記攪拌機構は、急激に冷却され
た水が液化ガスの噴出口付近で氷結してしまうのを防
ぐ。上記水槽内の上部空間から上記断熱ハウジングとの
上記隙間に導き出されたガスも相当の低温であり、これ
を上記送風機構で上記隙間内を対流させ、水槽全体を低
温の雰囲気で包む。上記断熱ハウジングはこの低温の雰
囲気を保つのに有効である。<< Operation >> By ejecting extremely low temperature liquefied gas into the water in the water tank, the water can be rapidly cooled by the latent heat and sensible heat of the liquefied gas. The stirring mechanism prevents the rapidly cooled water from being frozen in the vicinity of the liquefied gas ejection port. The gas introduced from the upper space in the water tank into the gap with the heat insulating housing is also at a considerably low temperature, and the gas is convected in the gap by the air blowing mechanism to wrap the entire water tank in a low temperature atmosphere. The insulating housing is effective in maintaining this low temperature atmosphere.
≪実 施 例≫ 以下、本発明の好適な実施例について添附図面を参照に
して説明する。<< Examples >> Hereinafter, preferred examples of the present invention will be described with reference to the accompanying drawings.
図はこの発明の一実施例によるコンクリート混合用水の
冷却装置の構成を示している。同図に示す７は水槽、５
は水槽７を全体的に覆う断熱材でできた断熱ハウジング
である。水槽７の外表面と断熱ハウジング５の間には、
後述のように気体を流通させるための隙間６を形成して
いる。The figure shows the construction of a cooling apparatus for concrete mixing water according to an embodiment of the present invention. 7 shown in the figure is a water tank, 5
Is a heat insulating housing made of a heat insulating material that entirely covers the water tank 7. Between the outer surface of the water tank 7 and the heat insulating housing 5,
As will be described later, a gap 6 for allowing gas to flow is formed.
水槽７には取水配管１１を通じて用水源から水が供給さ
れる。水槽７内の水は後述のように冷却され、冷却水は
給水配管１３を通じて図示しないコンクリートミキサー
に供給される。Water is supplied to the aquarium 7 from a water source through an intake pipe 11. The water in the water tank 7 is cooled as described later, and the cooling water is supplied to a concrete mixer (not shown) through the water supply pipe 13.
この実施例では冷媒の液化ガスとして液体窒素を使用す
る。１は液体窒素の貯蔵タンクで、このタンク１と水槽
７とは冷媒配管３で結ばれている。冷媒配管３は水槽７
の底部に配置されたノズル４に繋がっており、貯蔵タン
ク１の液体窒素がこのノズル４から水槽７内の水中に噴
出する。液体窒素の噴出量は流量調整弁２で加減でき
る。In this embodiment, liquid nitrogen is used as the liquefied gas of the refrigerant. Reference numeral 1 denotes a liquid nitrogen storage tank, and the tank 1 and the water tank 7 are connected by a refrigerant pipe 3. The refrigerant pipe 3 is a water tank 7
The liquid nitrogen of the storage tank 1 is connected to a nozzle 4 arranged at the bottom of the nozzle 4 and jets into the water in the water tank 7 from the nozzle 4. The jetting amount of liquid nitrogen can be adjusted by the flow rate adjusting valve 2.
水槽７内には、攪拌機構としてポンプ８およびこれに付
帯した内部配管９が設けられている。ポンプ８は、水槽
７内のノズル４と遠く離れた表面部分から水を吸込むと
ともに、ノズル４に向けてその水を噴射する。Inside the water tank 7, a pump 8 and an internal pipe 9 attached to the pump 8 are provided as a stirring mechanism. The pump 8 sucks water from a surface portion far away from the nozzle 4 in the water tank 7 and jets the water toward the nozzle 4.
水槽７の上部は通気孔１４で上記隙間６と通じている。
断熱ハウジング５の上部には、この隙間６内の気体を強
制対流させるための送風ファン１０が取り付けられてい
る。また、隙間６の内圧が所定値以上になると断熱ハウ
ジング５に取り付けられた調圧弁１５が作動し、ガスを
外部へ放出することにより内圧を所定値以下に保つ。The upper portion of the water tank 7 communicates with the gap 6 through a ventilation hole 14.
A blower fan 10 for forcibly convection the gas in the gap 6 is attached to the upper portion of the heat insulating housing 5. Further, when the internal pressure in the gap 6 exceeds a predetermined value, the pressure regulating valve 15 attached to the heat insulating housing 5 operates to release the gas to keep the internal pressure below the predetermined value.
なお、１２は水槽７内の水温を検出する温度センサで、
例えばサーミスタなどを使用する。In addition, 12 is a temperature sensor for detecting the water temperature in the water tank 7,
For example, a thermistor is used.
以上の構成において、水槽７内に所定量以上の水を蓄え
たならば、タンク１内の液体窒素をノズル４から噴出さ
せるとともに、ポンプ８を作動させる。ノズル４から噴
出された液体窒素の潜熱と顕著により、ノズル４の周辺
の水の熱は急激に奪われ、冷却される。ポンプ８が作動
していないと、ノズル４の周辺の水が氷結してしまう惧
れがあるが、ポンプ８の作動により、タンク内のもっと
も高温になる部分から給水した水がノズル４に向けて噴
射されるので、ノズル４の周辺が氷結することもなく、
かつ水槽７内の水が循環して無駄なる冷却される。In the above configuration, when a predetermined amount or more of water is stored in the water tank 7, the liquid nitrogen in the tank 1 is ejected from the nozzle 4 and the pump 8 is operated. Due to the remarkable latent heat of the liquid nitrogen ejected from the nozzle 4, the heat of the water around the nozzle 4 is rapidly removed and cooled. If the pump 8 is not operating, the water around the nozzle 4 may freeze, but due to the operation of the pump 8, the water supplied from the hottest part in the tank is directed toward the nozzle 4. Since it is jetted, there is no icing around the nozzle 4,
In addition, the water in the water tank 7 circulates and is wastedly cooled.
気化した窒素ガスは水槽７の上部空間に充満し、通気孔
１４から隙間６に入りこむ。この窒素ガスもまだ相当の
低温である。この低温の窒素ガスが送風ファン１０によ
って強制対流され、隙間６を循環する。その結果、断熱
ハウジング５の断熱性と相俟って、水槽７の周辺は非常
に低温の雰囲気で包み込まれ、水の冷却を促進するとと
もに外部の熱の影響を遮断する。The vaporized nitrogen gas fills the upper space of the water tank 7 and enters the gap 6 from the ventilation hole 14. This nitrogen gas is still at a considerably low temperature. This low-temperature nitrogen gas is forcibly convected by the blower fan 10 and circulates in the gap 6. As a result, in combination with the heat insulating property of the heat insulating housing 5, the periphery of the water tank 7 is wrapped in a very low temperature atmosphere, which accelerates the cooling of water and blocks the influence of external heat.
水温が所定値まで下がったならば、給水配管１３を通じ
てコンクリートミキサーに、水槽７内の水をコンクリー
ト混合用水として供給する。なお、冷却水をミキサーに
供給しながら水槽７に新たな水を導入し、冷却した混合
用水を連続的にミキサーに供給することもできる。この
場合、温度センサ１２の出力により流量調整弁２を自動
制御し、水槽７内の水温が所定値に保たれるように液体
窒素の噴出量を加減する。When the water temperature falls to a predetermined value, the water in the water tank 7 is supplied to the concrete mixer through the water supply pipe 13 as concrete mixing water. It is also possible to introduce new water into the water tank 7 while supplying the cooling water to the mixer and continuously supply the cooled mixing water to the mixer. In this case, the flow rate adjusting valve 2 is automatically controlled by the output of the temperature sensor 12, and the injection amount of liquid nitrogen is adjusted so that the water temperature in the water tank 7 is maintained at a predetermined value.
≪発明の効果≫ 以上詳細に説明したように、この発明に係るコンクリー
ト混合用水の冷却装置にあっては、冷媒として潜熱およ
び顕熱が非常に大きな液化ガスを使用するので、短時間
で大量の混合用水を充分な低温にまで冷却することがで
きる。液化ガスはタンクに貯蔵され、その取扱いは簡便
であり、小さな容量でも非常に大きな冷熱源となる。従
って、体積および重量が嵩む氷を使用する場合に比べ、
設備全体が小型化し、かつ高効率化する。<< Effects of the Invention >> As described in detail above, in the cooling device for concrete mixing water according to the present invention, since a liquefied gas with very large latent heat and sensible heat is used as a refrigerant, a large amount of gas can be obtained in a short time. The mixing water can be cooled to a sufficiently low temperature. The liquefied gas is stored in a tank, its handling is simple, and it is a very large cold heat source even with a small capacity. Therefore, compared to the case of using ice, which has a large volume and weight,
The entire equipment will be smaller and more efficient.
図はこの発明の一実施例装置の構成図である。 １……液体窒素の貯蔵タンク ３……冷媒配管、４……ノズル ５……断熱ハウジング、６……隙間 ７……水槽、８……ポンプ（攪拌機構の要部） １０……送風ファン（送風機構の要部） １１……取水配管、１２……温度センサ １３……給水配管、１５……調圧弁 The figure is a block diagram of an apparatus according to an embodiment of the present invention. 1 ... Liquid nitrogen storage tank 3 ... Refrigerant piping, 4 ... Nozzle 5 ... Insulating housing, 6 ... Gap 7 ... Water tank, 8 ... Pump (main part of stirring mechanism) 10 ... Blower fan ( 11) Intake pipe, 12 ... Temperature sensor 13 ... Water supply pipe, 15 ... Pressure regulating valve
Claims (1)
通する隙間を保ってこの水槽を覆う断熱ハウジングと、
用水源から該水槽に水を導入する取水配管系と、該水槽
内の水をコンクリートミキサーに供給する給水配管系
と、液化ガスを貯蔵するタンクと、該タンク内の液化ガ
スを該水槽に導いて内部の水中に噴出する液化ガス供給
配管系と、該水槽の水を攪拌する攪拌機構と、該液化ガ
スの供給により該水槽内上部空間に充満するガスを該断
熱ハウジングとの該隙間に導出し、その隙間内に該ガス
を対流させる送風機構と、該断熱ハウジング内の圧力を
調整する調圧弁と、該水槽内の水温を検出する温度セン
サとを備えたコンクリート混合用水の冷却装置。1. A heat-insulating housing for covering a water tank with a gap for allowing gas to flow between the water tank and an outer surface of the water tank,
A water intake piping system for introducing water from a water source into the water tank, a water supply piping system for supplying water in the water tank to a concrete mixer, a tank for storing liquefied gas, and a liquefied gas in the tank for guiding to the water tank. A liquefied gas supply piping system that sprays into the water inside, a stirring mechanism that stirs the water in the water tank, and the gas that fills the upper space inside the water tank by supplying the liquefied gas to the gap between the heat insulating housing A cooling device for concrete mixing water, which includes a blower mechanism for convection of the gas in the gap, a pressure regulating valve for adjusting the pressure in the heat insulating housing, and a temperature sensor for detecting the water temperature in the water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60071224A JPH0611488B2 (en) | 1985-04-05 | 1985-04-05 | Cooling device for concrete mixing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60071224A JPH0611488B2 (en) | 1985-04-05 | 1985-04-05 | Cooling device for concrete mixing water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61229509A JPS61229509A (en) | 1986-10-13 |
| JPH0611488B2 true JPH0611488B2 (en) | 1994-02-16 |
Family
ID=13454491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60071224A Expired - Fee Related JPH0611488B2 (en) | 1985-04-05 | 1985-04-05 | Cooling device for concrete mixing water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0611488B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6430208U (en) * | 1987-08-18 | 1989-02-23 | ||
| JPH01172248A (en) * | 1987-12-25 | 1989-07-07 | Fukuvi Chem Ind Co Ltd | Production of cement composition for extrusion molding |
| JPH0521373Y2 (en) * | 1988-10-08 | 1993-06-01 |
-
1985
- 1985-04-05 JP JP60071224A patent/JPH0611488B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61229509A (en) | 1986-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3972202A (en) | Closed loop cryogenic delivery | |
| JP2020510558A (en) | Cooling system and method | |
| JPH0611488B2 (en) | Cooling device for concrete mixing water | |
| US4161108A (en) | Method and apparatus for reducing the temperature of a fluid | |
| US20050258269A1 (en) | Mobile pumping unit for dispensing insulting material in situ | |
| KR100653269B1 (en) | Refrigerant circulation cooling device for curing concrete dam | |
| US12502648B2 (en) | Wet concrete conditioning | |
| US5142999A (en) | Incinerator with fluid-cooled hearth | |
| US3771718A (en) | Water cooling method and apparatus | |
| JP2015136860A (en) | fine aggregate cooling system and fine aggregate cooling method | |
| US2966039A (en) | Carbon dioxide discharge device | |
| US7171814B2 (en) | Method and apparatus for carbon dioxide accelerated unit cooldown | |
| JPWO2006114887A1 (en) | Method and apparatus for producing slush fluid | |
| JP2601845B2 (en) | Concrete kneading equipment with aggregate pre-cooling device | |
| JPH0369282B2 (en) | ||
| US7461590B2 (en) | System for cooking and then cooling food products by immersion in a heat transfer fluid | |
| JPS61199911A (en) | Concrete mixer having cooling function | |
| JPH0118561Y2 (en) | ||
| JPS61286457A (en) | Construction method of concrete | |
| JPS6426406A (en) | Manufacture of cooled concrete due to injection of low-temperature liquefied gas | |
| JPH0349855Y2 (en) | ||
| JPH0521374Y2 (en) | ||
| JP2006144910A (en) | Gas access and storage facilities | |
| CN224044142U (en) | Concrete mixing equipment for airport pavement repair | |
| SU1406432A1 (en) | Apparatus for freezing and storing biological objects |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |