JP2010076101A - Dust collector of ready mixed concrete-manufacturing plant - Google Patents

Dust collector of ready mixed concrete-manufacturing plant Download PDF

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JP2010076101A
JP2010076101A JP2008243569A JP2008243569A JP2010076101A JP 2010076101 A JP2010076101 A JP 2010076101A JP 2008243569 A JP2008243569 A JP 2008243569A JP 2008243569 A JP2008243569 A JP 2008243569A JP 2010076101 A JP2010076101 A JP 2010076101A
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dust
dust collector
suction
plant
mixer
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Seishi Kakiuchi
誠士 垣内
Takeshi Yamamoto
剛 山本
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Nikko Co Ltd
Nikko KK
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Nikko Co Ltd
Nikko KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collector of a ready mixed concrete-manufacturing plant, capable of keeping the interior of the plant body clean by collecting dust effectively in accordance with dust concentration. <P>SOLUTION: The plant body 7 includes two dust collectors 36 and 37 for absorbing dust, and absorbing ducts 38 and 39 facing to a dust generating source in the plant body 7 are connected to the dust collectors 36 and 37 respectively. Dust sensors 40a, 40b, 40c and 40d are mounted in the vicinity of the absorbing openings 38a, 38b, 38c and 39d of the absorbing ducts 38 and 39 respectively. Since the absorbing force of the dust collectors 36 and 37 is adjusted through an invertor control in accordance with the dust concentration detected with the dust sensors 40a, 40b, 40c and 40d and the number of the dust sensors detecting the dust, it is possible to collect the dust effectively without waste and keep the plant body 7 clean effectively. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、各種コンクリート材料を計量、混練処理して生コンクリートを製造する生コンクリート製造プラントにおいて、特にプラント本体にて発生する粉塵を吸引、除去してプラント本体内を清浄に維持する生コンクリート製造プラントの集塵装置に関する。   The present invention relates to a ready-mixed concrete manufacturing plant that measures and kneads various concrete materials to manufacture ready-mixed concrete. In particular, ready-mixed concrete manufacture that keeps the inside of the plant clean by sucking and removing dust generated in the main body of the plant. The present invention relates to a dust collector of a plant.

生コンクリート製造プラントは、例えば特許文献1(特開2000−84923号公報)に示されるように、基礎となる架台上にミキサ室、計量室、貯蔵室、及び受材室を順に階層状に積み上げて成るプラント本体と、地上からプラント本体最上部の受材室に掛け渡された骨材搬送用の傾斜コンベヤ等から構成される。前記傾斜コンベヤの先端部は受材室に備えた受材シュート内に臨ませており、該受材シュートに払い出された砂利、砂等の骨材は旋回自在とした分配シュートを介して下位の貯蔵室の骨材貯蔵槽に骨材種毎に分配貯蔵される。一方、残りのコンクリート材料である、セメント、水、混和剤等はそれぞれ供給ポンプ等により、貯蔵室に備えた各種貯蔵槽に貯蔵される。   As shown in, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2000-84923), a ready-mixed concrete manufacturing plant stacks a mixer room, a weighing room, a storage room, and a receiving room in order on a base frame. The plant main body and an inclined conveyor for transporting aggregates spanned from the ground to the uppermost receiving chamber of the plant main body. The tip of the inclined conveyor faces a receiving chute provided in the receiving chamber, and aggregates such as gravel and sand delivered to the receiving chute are placed in a lower position via a swivelable distribution chute. Each aggregate type is distributed and stored in an aggregate storage tank in the storage room. On the other hand, the remaining concrete materials, such as cement, water, and admixture, are stored in various storage tanks provided in the storage chamber by a supply pump or the like.

そして、上記生コンクリート製造プラントにて生コンクリートを製造するときには、各貯蔵槽に貯蔵した砂利、砂、セメント、水、混和剤等の各種コンクリート材料を下位の計量室の各計量槽に払い出して所定量ずつ計量し、計量完了後、更に下位のミキサ室のミキサに順次投入し、所定時間混練して所望性状の生コンクリートを製造している。   When producing ready-mixed concrete at the ready-mixed concrete production plant, various concrete materials such as gravel, sand, cement, water, and admixture stored in each storage tank are dispensed to each measuring tank in the subordinate measuring room. A certain amount is weighed, and after weighing is completed, it is sequentially put into a mixer in a lower mixer chamber and kneaded for a predetermined time to produce ready-mixed concrete.

このとき、微粉体であるセメントは、貯蔵槽から計量槽に払い出す際や、計量槽からミキサに投入する際に粉塵となって大量に舞い上がるため、これらの継ぎ目を蛇腹やキャンバス等の可撓性部材で覆って密封構造としたり、特許文献2(特開2000−75400号公報)に示すように、ミキサ近傍に集塵機を備えてミキサ内の粉塵を吸引して除去するようにしている。
特開2000−84923号公報 特開2000−75400号公報
At this time, the cement, which is a fine powder, rises in large quantities as dust when it is discharged from the storage tank to the measuring tank or when it is put into the mixer from the measuring tank, so these seams are flexible such as bellows and canvas. The structure is covered with a sealing member to form a sealed structure, or as shown in Patent Document 2 (Japanese Patent Laid-Open No. 2000-75400), a dust collector is provided in the vicinity of the mixer to remove the dust in the mixer by suction.
JP 2000-84923 A JP 2000-75400 A

しかしながら、上記従来装置等では、ミキサ混練中は集塵機にて絶えず全開の吸引力にて集塵を行っているため、粉塵の少なくなる混練終了間際などでは無駄も多く、効率面で改良の余地があると考えられる。また、粉塵はセメント以外からも、例えば砂利、砂等の骨材からも同様に発生し、特に最近においては骨材資源の枯渇に伴ってより粉塵の発生しやすい砕石等が骨材として使用される場合も増えつつあり、従来装置のようなミキサ内の集塵だけではプラント本体内を清浄な状態に維持することは難しい。   However, in the above-mentioned conventional apparatus, etc., during the mixer kneading, the dust collector continuously collects the dust with the fully open suction force, so there is a lot of waste at the end of the kneading where the dust is reduced and there is room for improvement in terms of efficiency. It is believed that there is. In addition, dust is generated from other than cement as well, for example, aggregates such as gravel and sand. Recently, crushed stones that are more likely to generate dust due to depletion of aggregate resources are used as aggregates. However, it is difficult to keep the inside of the plant body clean only by collecting the dust in the mixer as in the conventional apparatus.

本発明は上記の点に鑑み、プラント本体内をその粉塵濃度に応じて効率よく集塵して清浄に維持することを可能とした生コンクリート製造プラントの集塵装置を提供することを課題とする。   This invention makes it a subject to provide the dust collector of the ready-mixed concrete manufacturing plant which enabled it to collect dust efficiently according to the dust density | concentration, and to maintain cleanly in view of said point. .

上記の課題を解決するために、本発明に係る請求項1記載の生コンクリート製造プラントの集塵装置では、架台上にミキサ室、計量室、貯蔵室、及び受材室を階層状に積み上げて成るプラント本体に粉塵吸引用の集塵機を少なくとも一基以上備え、該集塵機に連結した少なくとも一本以上の吸引ダクトをプラント本体内の粉塵発生源に臨ませると共に、吸引ダクトの吸引口付近には粉塵センサを備え、該粉塵センサにて検出される粉塵濃度に応じて前記集塵機の吸引力をインバータ制御にて調整するように構成したことを特徴としている。   In order to solve the above problems, in the dust collector of the ready-mixed concrete manufacturing plant according to claim 1 according to the present invention, a mixer chamber, a weighing chamber, a storage chamber, and a receiving chamber are stacked on a gantry in a hierarchical manner. The plant body is provided with at least one dust collector for sucking dust, and at least one suction duct connected to the dust collector is made to face the dust generation source in the plant body, and there is dust near the suction port of the suction duct. A sensor is provided, and the suction force of the dust collector is adjusted by inverter control according to the dust concentration detected by the dust sensor.

また、請求項2記載の生コンクリート製造プラントの集塵装置では、集塵機に複数本の吸引ダクトを連結した場合に、粉塵を検出した粉塵センサの数に応じて前記集塵機の吸引力をインバータ制御にて調整するように構成したことを特徴としている。   In the dust collector of the ready-mixed concrete manufacturing plant according to claim 2, when a plurality of suction ducts are connected to the dust collector, the suction force of the dust collector is controlled by an inverter according to the number of dust sensors that detect dust. It is characterized by being configured to adjust.

また、請求項3記載の生コンクリート製造プラントの集塵装置では、プラント本体内に二基の集塵機を備え、そのうちの一基をプラント本体上部側に設置し、この上部集塵機にて主にプラント本体上部側の受材室と貯蔵室の粉塵を吸引させる一方、残りの一基をプラント本体下部側に設置し、この下部集塵機にて主にプラント本体下部側の計量室とミキサ室の粉塵を吸引させるようにしたことを特徴としている。   Moreover, in the dust collector of the ready-mixed concrete manufacturing plant of Claim 3, it has two dust collectors in the plant main body, one of them is installed in the plant main body upper side, and the plant main body is mainly used by this upper dust collector. While the dust in the upper receiving chamber and storage room is sucked in, the remaining one is installed in the lower part of the plant body, and this lower dust collector mainly sucks the dust in the weighing room and mixer room in the lower part of the plant body. It is characterized by the fact that it was made to let you.

また、請求項4記載の生コンクリート製造プラントの集塵装置では、前記集塵機の一基を骨材貯蔵槽の上位に設置すると共に、該集塵機の下端部と骨材貯蔵槽とを連通管にて連通させ、該連通管に備えた開閉弁の開放操作によって回収した粉塵を骨材貯蔵槽に投入して還元させるようにしたことを特徴としている。   Moreover, in the dust collector of the ready-mixed concrete manufacturing plant of Claim 4, while installing one set of the said dust collector above the aggregate storage tank, the lower end part of this dust collector and the aggregate storage tank are connected by the communicating pipe. It is characterized in that the dust collected by the opening operation of the on-off valve provided in the communication pipe is put into the aggregate storage tank for reduction.

また、請求項5記載の生コンクリート製造プラントの集塵装置では、戦記集塵機の一基をミキサの上位に設置すると共に、該集塵機の下端部とミキサとを連通管にて連通させ、該連通管に備えた開閉弁の開放操作によって回収した粉塵を1バッチ毎にミキサへ投入して還元させるようにしたことを特徴としている。   Moreover, in the dust collector of the ready-mixed concrete manufacturing plant of Claim 5, while installing one set of war record dust collectors above the mixer, the lower end part of the dust collector and the mixer are connected by a communication pipe, and the communication pipe The dust collected by the opening operation of the on-off valve provided in is put into a mixer for every batch and reduced.

また、請求項6記載の生コンクリート製造プラントの集塵装置では、吸引ダクトから分岐させた分岐ダクトにプラント本体内のダスト清掃用の吸引ホースを連結する一方、前記分岐ダクトの途中にはダクト開閉用の開閉弁を備え、該開閉弁の開放操作によって前記集塵機の吸引力を利用して吸引ホースの吸引力を得るように構成したことを特徴としている。   Further, in the dust collector of the ready-mixed concrete manufacturing plant according to claim 6, a suction hose for dust cleaning in the plant body is connected to the branch duct branched from the suction duct, and the duct is opened and closed in the middle of the branch duct. The on-off valve is provided, and the suction force of the suction hose is obtained by using the suction force of the dust collector by opening the on-off valve.

また、請求項7記載の生コンクリート製造プラントの集塵装置では、前記分岐ダクトと吸引ホースとの間に、重量ダストを分離回収するサイクロンを介在させたことを特徴としている。   In the dust collector of the ready-mixed concrete manufacturing plant according to claim 7, a cyclone for separating and collecting heavy dust is interposed between the branch duct and the suction hose.

本発明に係る請求項1記載の生コンクリート製造プラントの集塵装置によれば、架台上にミキサ室、計量室、貯蔵室、及び受材室を階層状に積み上げて成るプラント本体に粉塵吸引用の集塵機を少なくとも一基以上備え、該集塵機に連結した少なくとも一本以上の吸引ダクトをプラント本体内の粉塵発生源に臨ませると共に、吸引ダクトの吸引口付近には粉塵センサを備え、該粉塵センサにて検出される粉塵濃度に応じて前記集塵機の吸引力をインバータ制御にて調整するように構成したので、プラント本体内の粉塵発生源を効率よく集塵してプラント本体内を清浄に維持することができる。   According to the dust collecting apparatus of the ready-mixed concrete manufacturing plant of the first aspect of the present invention, dust suction is applied to the plant body formed by stacking the mixer chamber, the measurement chamber, the storage chamber, and the receiving chamber on the gantry. At least one dust collector, and at least one suction duct connected to the dust collector is faced to a dust generation source in the plant body, and a dust sensor is provided near the suction port of the suction duct. Since the suction force of the dust collector is adjusted by inverter control according to the dust concentration detected in the above, the dust generation source in the plant body is efficiently collected to keep the plant body clean. be able to.

また、請求項2記載の生コンクリート製造プラントの集塵装置によれば、集塵機に複数本の吸引ダクトを連結した場合に、粉塵を検出した粉塵センサの数に応じて前記集塵機の吸引力をインバータ制御にて調整するように構成したので、プラント本体内の複数の粉塵発生源を効率よく集塵してプラント本体内を清浄に維持することができる。   Further, according to the dust collector of the ready-mixed concrete manufacturing plant according to claim 2, when a plurality of suction ducts are connected to the dust collector, the suction force of the dust collector is converted to an inverter according to the number of dust sensors that detect the dust. Since it is configured to be adjusted by control, a plurality of dust generation sources in the plant body can be efficiently collected to keep the inside of the plant body clean.

また、請求項3記載の生コンクリート製造プラントの集塵装置によれば、プラント本体内に二基の集塵機を備え、そのうちの一基をプラント本体上部側に設置し、この上部集塵機にて主にプラント本体上部側の受材室と貯蔵室の粉塵を吸引させる一方、残りの一基をプラント本体下部側に設置し、この下部集塵機にて主にプラント本体下部側の計量室とミキサ室の粉塵を吸引させるようにしたので、粉塵発生源が点在するプラント本体内を二基の集塵機で分担して効率よく集塵でき、集塵機の無用な大型化や過負荷を防ぐことができて好適である。   Further, according to the dust collector of the ready-mixed concrete manufacturing plant according to claim 3, two dust collectors are provided in the plant body, one of them is installed on the upper side of the plant body, and the upper dust collector mainly While the dust in the receiving room and storage room on the upper side of the plant body is sucked, the remaining one is installed on the lower side of the plant body, and this lower dust collector mainly uses the dust in the weighing room and mixer room on the lower side of the plant body. This is suitable because it can efficiently collect dust by sharing the inside of the plant where the dust generation sources are scattered with two dust collectors, and can prevent unnecessary increase in size and overload of the dust collector. is there.

また、請求項4記載の生コンクリート製造プラントの集塵装置によれば、前記集塵機の一基を骨材貯蔵槽の上位に設置すると共に、該集塵機の下端部と骨材貯蔵槽とを連通管にて連通させ、該連通管に備えた開閉弁の開放操作によって回収した粉塵を骨材貯蔵槽に投入して還元させるようにしたので、ごく簡易で低廉な構成ながら、集塵して回収した粉塵をコンクリート材料として有効に再利用させることが可能となる。   According to the dust collector of the ready-mixed concrete manufacturing plant according to claim 4, one of the dust collectors is installed above the aggregate storage tank, and the lower end portion of the dust collector and the aggregate storage tank are connected to each other through the communication pipe. In order to reduce the dust collected by opening the on-off valve provided in the communication pipe to the aggregate storage tank, it was collected and collected in a very simple and inexpensive configuration. Dust can be effectively reused as a concrete material.

また、請求項5記載の生コンクリート製造プラントの集塵装置によれば、前記集塵機の一基をミキサの上位に設置すると共に、該集塵機の下端部とミキサとを連通管にて連通させ、該連通管に備えた開閉弁の開放操作によって回収した粉塵を1バッチ毎にミキサへ投入して還元させるようにしたので、生コンクリートの品質への影響を極力抑えながら、集塵して回収した粉塵をコンクリート材料として有効に再利用させることが可能となる。   Further, according to the dust collector of the ready-mixed concrete manufacturing plant according to claim 5, one set of the dust collector is installed above the mixer, the lower end portion of the dust collector and the mixer are communicated with each other through a communication pipe, Dust collected by opening the on-off valve provided in the communication pipe is put into a mixer for reduction every batch, so dust collected and collected while minimizing the impact on the quality of ready-mixed concrete. Can be effectively reused as a concrete material.

また、請求項6記載の生コンクリート製造プラントの集塵装置によれば、吸引ダクトから分岐させた分岐ダクトにプラント本体内のダスト清掃用の吸引ホースを連結する一方、前記分岐ダクトの途中にはダクト開閉用の開閉弁を備え、該開閉弁の開放操作によって前記集塵機の吸引力を利用して吸引ホースの吸引力を得るように構成したので、プラント本体内のミキサ室、計量室、貯蔵室、及び受材室の床面上等に溜まった骨材やセメント等のダストも簡単に清掃可能となり、プラント本体内をより一層清浄に維持することができる。   Moreover, according to the dust collector of the ready-mixed concrete manufacturing plant of Claim 6, while connecting the suction hose for dust cleaning in a plant body to the branch duct branched from the suction duct, An opening / closing valve for opening and closing the duct is provided, and the suction force of the suction hose is obtained by using the suction force of the dust collector by opening the opening / closing valve, so that the mixer chamber, the measuring chamber, the storage chamber in the plant body And dust such as aggregate and cement accumulated on the floor surface of the receiving chamber can be easily cleaned, and the inside of the plant body can be kept even cleaner.

また、請求項7記載の生コンクリート製造プラントの集塵装置によれば、前記分岐ダクトと吸引ホースとの間に、重量ダストを分離回収するサイクロンを介在させたので、不用意に吸い込まれた金属片等の重量ダストが集塵機を損傷したり、骨材貯蔵槽やミキサに投入されて生コンクリートの品質に影響が出るのを防ぐことができる。   Moreover, according to the dust collector of the ready-mixed concrete manufacturing plant of Claim 7, since the cyclone which isolate | separates and collects heavy dust was interposed between the said branch duct and the suction hose, the metal sucked carelessly It is possible to prevent heavy dust such as fragments from damaging the dust collector or being put into an aggregate storage tank or mixer and affecting the quality of ready-mixed concrete.

本発明に係る生コンクリート製造プラントの集塵装置にあっては、プラント本体に粉塵吸引用の集塵機を二基備え、そのうちの一基をプラント本体上部側である骨材貯蔵槽の上位に設置し、該上部集塵機に連結した吸引ダクトをプラント本体上部側の粉塵発生源である、例えば受材室の受材シュートや、その下位の分配シュート、及び貯蔵室の骨材貯蔵槽下端の排出ゲートにそれぞれ臨ませて粉塵を吸引させるようにしている一方、残りの一基をプラント本体下部側であるミキサの上位に設置し、該下部集塵機に連結した吸引ダクトをプラント本体下部側の粉塵発生源である、例えばミキサ室のミキサや、計量室のセメント計量槽のエア抜きダクトにそれぞれ臨ませて粉塵を吸引させるようにしている。   In the dust collector of the ready-mixed concrete production plant according to the present invention, the plant body is equipped with two dust collectors for sucking dust, and one of them is installed above the aggregate storage tank on the upper side of the plant body. The suction duct connected to the upper dust collector is a dust generation source on the upper side of the plant body, for example, a receiving chute in the receiving chamber, a lower distribution chute, and a discharge gate at the lower end of the aggregate storage tank in the storage chamber Dust is sucked in each of them, while the remaining one is installed above the mixer on the lower side of the plant body, and the suction duct connected to the lower dust collector is connected to the dust generation source on the lower side of the plant body. For example, dust is sucked by facing a mixer in a mixer chamber or an air vent duct of a cement measuring tank in a measuring chamber.

前記各吸引ダクトの吸引口付近にはそれぞれ粉塵センサを備えており、各粉塵センサにて検出される粉塵濃度に応じ、或いは粉塵を検出した粉塵センサの数に応じて各集塵機の吸引力をインバータ制御にて調整するように構成している。例えば、主にミキサ内の集塵を行う下部集塵機においては、ミキサと連動して起動すると共に、粉塵センサにて検出されるミキサ内の粉塵濃度に応じて吸引力を調整するようにしている一方、受材シュートや、分配シュート、及び骨材の排出ゲートの三箇所の集塵を行う上部集塵機においては、何れの粉塵センサも粉塵を検出していなければ集塵機を停止(待機)状態としておき、何れか一箇所でも検出すれば起動すると共に、粉塵を検出した粉塵センサの数に応じて吸引力を調整するようにしている。   A dust sensor is provided in the vicinity of the suction port of each suction duct, and the suction force of each dust collector is invertered according to the dust concentration detected by each dust sensor or according to the number of dust sensors that detected dust. It is configured to adjust by control. For example, in the lower dust collector that mainly collects dust in the mixer, it is activated in conjunction with the mixer, and the suction force is adjusted according to the dust concentration in the mixer detected by the dust sensor. In the upper dust collector that collects dust at the three locations of the receiving chute, distribution chute, and aggregate discharge gate, if any dust sensor has not detected dust, the dust collector is stopped (standby), If any one of the points is detected, the system is activated and the suction force is adjusted according to the number of dust sensors that have detected the dust.

また、前記上部集塵機では、その下端部と直下の骨材貯蔵槽とを連通管にて連通させており、該連通管に備えた開閉弁であるバタフライ弁の開放操作によって集塵機に回収した粉塵を適宜骨材貯蔵槽に落下投入して還元させるように構成している。一方、下部集塵機では、その下端部と近傍のミキサとを連通管にて連通させており、該連通管に備えた開閉弁であるバタフライ弁の開放操作と、送出用のエア噴射ノズルからのエア噴射によって集塵機に回収した粉塵を1バッチ毎にミキサへ投入して還元させるように構成している。   In the upper dust collector, the lower end of the upper dust collector and the aggregate storage tank directly below are communicated with each other through a communication pipe, and dust collected in the dust collector by the opening operation of a butterfly valve that is an on-off valve provided in the communication pipe is collected. It is configured to drop into an aggregate storage tank as appropriate for reduction. On the other hand, in the lower dust collector, the lower end of the lower dust collector and a nearby mixer are communicated with each other through a communication pipe. An operation for opening a butterfly valve, which is an on-off valve provided in the communication pipe, Dust collected in the dust collector by injection is put into a mixer for every batch and reduced.

また、前記吸引ダクトからは複数の分岐ダクトを分岐させ、各分岐ダクトをそれぞれミキサ室、計量室、貯蔵室、及び受材室に延ばしていると共に、各分岐ダクトの先端部には金属片等の重量ダストを分離回収するサイクロンを介して各階の床面上等に溜まった骨材やセメント等のダストを吸引して清掃する吸引ホースを連結している一方、各分岐ダクトにはダクト開閉用のバタフライ弁を備え、該バタフライ弁の開放操作によって前記各集塵機の吸引力を利用して吸引ホースの吸引力を得られるように構成している。   Further, a plurality of branch ducts are branched from the suction duct, and each branch duct is extended to the mixer chamber, the measurement chamber, the storage chamber, and the receiving material chamber, and a metal piece or the like is provided at the tip of each branch duct. A suction hose that sucks and cleans dust such as aggregate and cement collected on the floor surface of each floor is connected via a cyclone that separates and collects heavy dust, while each branch duct is used for opening and closing ducts. The butterfly valve is provided, and the suction force of the suction hose can be obtained using the suction force of each dust collector by opening the butterfly valve.

そして、この生コンクリート製造プラントにて生コンクリートを製造するときには、先ず傾斜コンベヤにてコンクリート材料である砂利、砂等の骨材を搬送してプラント本体最上部の受材室の受材シュートへ送り込み、該受材シュートから分配シュートを介して下位の骨材貯蔵槽へ骨材種毎に分配貯蔵させると共に、残りのコンクリート材料であるセメント、水、混和剤等をそれぞれ供給ポンプにて各種貯蔵槽に貯蔵させる。そして、各貯蔵槽に貯蔵した砂利、砂、セメント、水、混和剤等の各種コンクリート材料を下位の各計量槽に払い出して所定量ずつ計量し、計量完了後、更に下位のミキサに順次投入し、所定時間混練して所望性状の生コンクリートを製造する。   When producing ready-mixed concrete in this ready-mixed concrete manufacturing plant, first, aggregates such as gravel and sand, which are concrete materials, are conveyed by an inclined conveyor and sent to a receiving chute in the receiving room at the top of the plant body. In addition, the storage chute is distributed and stored for each aggregate type from the receiving chute to the lower aggregate storage tank via the distribution chute, and the remaining concrete materials such as cement, water, admixture, etc. To store. Then, various concrete materials such as gravel, sand, cement, water, admixture, etc. stored in each storage tank are dispensed to each subordinate measuring tank and weighed in a predetermined amount. Kneading for a predetermined time to produce ready-mixed concrete with desired properties.

このとき、プラント本体上部側の受材シュートや、分配シュート、及び骨材貯蔵槽下端の排出ゲートに臨ませた吸引ダクトの何れかの粉塵センサが粉塵を検出すると、停止(待機)状態にある上部集塵機が直ちに起動すると共に、その検出した粉塵センサの数に応じて集塵機の吸引力をインバータ制御にて調整した上で集塵を行う。なお、この上部集塵機にて回収した粉塵は、連通管のバタフライ弁の開放操作によって適宜骨材貯蔵槽に落下投入して還元させて再利用する。一方、プラント本体下部側のミキサでは、ミキサと連動して下部集塵機が起動すると共に、ミキサに臨ませた吸引ダクトの粉塵センサが検出するミキサ内の粉塵濃度に応じて集塵機の吸引力をインバータ制御にて調整した上で集塵を行う。なお、この下部集塵機にて回収した粉塵は、連通管のバタフライ弁の開放操作、及びエア噴射ノズルからのエア噴射によって1バッチ毎にミキサへ投入して還元させて再利用する。   At this time, when any dust sensor of the suction chute facing the receiving chute on the upper side of the plant body, the distribution chute, and the discharge gate at the lower end of the aggregate storage tank detects dust, it is in a stopped (standby) state. The upper dust collector is started immediately, and the dust is collected after adjusting the suction force of the dust collector by inverter control according to the number of detected dust sensors. The dust collected by the upper dust collector is dropped into the aggregate storage tank as appropriate by opening the butterfly valve of the communication pipe, and is reduced for reuse. On the other hand, in the mixer on the lower side of the plant body, the lower dust collector is started in conjunction with the mixer, and the suction power of the dust collector is controlled by the inverter according to the dust concentration detected by the dust sensor in the suction duct facing the mixer. Dust collection after adjusting with. The dust collected by the lower dust collector is thrown into the mixer for every batch by the operation of opening the butterfly valve of the communication pipe and the air injection from the air injection nozzle, and is reduced and reused.

また、プラント本体内のミキサ室や、計量室、貯蔵室、及び受材室の床面上等に骨材やセメント等のダストが溜まっておれば、プラント非稼働時等を見計らって分岐ダクトのバタフライ弁を開放操作すると共に集塵機を起動させ、その吸引力を利用して吸引ホースより各階の床面上に溜まったダストを吸引して清掃を行う。このとき、金属片等の重量ダストを不用意に吸い込んでしまってもサイクロンにて分離除去されるため、集塵機を損傷したり、骨材貯蔵槽やミキサに投入されて生コンクリートの品質に悪影響が出るようなおそれはない。   Also, if dust such as aggregates or cement accumulates on the floors of the mixer room, weighing room, storage room, and receiving room in the plant body, the branch duct should be While opening the butterfly valve, the dust collector is activated, and the suction force is used to suck dust collected on the floor of each floor from the suction hose for cleaning. At this time, even if heavy dust such as metal pieces is inadvertently sucked in, it is separated and removed by the cyclone, so the dust collector is damaged, or it is thrown into the aggregate storage tank or mixer, and the quality of the ready-mixed concrete is adversely affected. There is no fear of getting out.

このように、プラント本体内の粉塵発生源に臨ませた集塵機の吸引ダクトに粉塵センサを備え、該粉塵センサにて検出される粉塵濃度に応じて集塵機の吸引力をインバータ制御にて調整しながら集塵するようにしたので、無駄も少なくて効率よく集塵でき、プラント本体内を効果的に清浄に維持できる。また、吸引ダクトを複数の粉塵発生源に臨ませた場合には、粉塵を検出した粉塵センサの数に応じて集塵機の吸引力をインバータ制御にて調整しながら集塵するようにしたので、上記同様に無駄も少なくて効率よく集塵できる。   In this way, a dust sensor is provided in the suction duct of the dust collector facing the dust generation source in the plant body, and the suction force of the dust collector is adjusted by inverter control according to the dust concentration detected by the dust sensor. Since dust is collected, dust can be collected efficiently with little waste, and the inside of the plant body can be effectively kept clean. In addition, when the suction duct is exposed to a plurality of dust generation sources, dust is collected while adjusting the suction force of the dust collector by inverter control according to the number of dust sensors that have detected dust. Similarly, dust can be collected efficiently with little waste.

また、集塵機をプラント本体上部側と下部側とに二基備え、それぞれの集塵機にてプラント本体内に点在する複数の粉塵発生源を分担して集塵させるようにしたので、プラント本体全体を集塵する場合でも集塵機への過負荷や無用な大型化を防げ、無駄も少なくて効率よく集塵できる。更に、集塵機にて回収した粉塵を骨材貯蔵槽やミキサへ適宜還元させるようにしたので、粉塵を廃棄処理する手間やコストが省け、有効に再利用することが可能となる。   In addition, two dust collectors are provided on the upper and lower sides of the plant body, and each dust collector shares a plurality of dust generation sources scattered within the plant body so that the entire plant body is collected. Even when collecting dust, it is possible to prevent overload and unnecessary enlargement of the dust collector, and to collect dust efficiently with little waste. Furthermore, since the dust collected by the dust collector is appropriately reduced to the aggregate storage tank and the mixer, it is possible to save the labor and cost of discarding the dust and to reuse it effectively.

更に、吸引ダクトから分岐させた分岐ダクトにプラント本体内のダスト清掃用の吸引ホースを連結したので、プラント非稼働時には集塵機の吸引力を利用しながらプラント本体内の清掃が手軽に行え、低コストでプラント本体内をより一層効果的に清浄に維持できる。   In addition, since the suction hose for dust cleaning in the plant body is connected to the branch duct branched from the suction duct, the inside of the plant body can be easily cleaned while using the suction force of the dust collector when the plant is not in operation. Thus, the inside of the plant body can be maintained more effectively and cleanly.

以下、本発明の実施例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図中の1は、各種コンクリート材料を貯蔵、計量、混練して生コンクリートを製造する生コンクリート製造プラントであって、基礎となる架台2上にミキサ室3、計量室4、貯蔵室5、及び受材室6を順に階層状に積み上げて成るプラント本体7と、地上の骨材ヤード(図示せず)から前記プラント本体7最上部の受材室6に掛け渡した骨材搬送用の傾斜コンベヤ8等から主体を構成している。   Reference numeral 1 in the figure denotes a ready-mixed concrete manufacturing plant that stores, measures, and kneads various concrete materials to manufacture ready-mixed concrete. On the base frame 2, a mixer chamber 3, a measuring chamber 4, a storage chamber 5, and A plant main body 7 in which the receiving chambers 6 are stacked in order, and an inclined conveyor for conveying the aggregate spanned from an above-ground aggregate yard (not shown) to the receiving chamber 6 at the top of the plant main body 7. The main body is composed of 8 etc.

前記傾斜コンベヤ8は、先端部のヘッドプーリ9と末端部のテールプーリ(図示せず)間にベルト10を巻回したもので、前記ヘッドプーリ9を受材室6に備えた骨材受け入れ用の受材シュート11内に臨ませている。また、前記受材シュート11の下位には、受材シュート11内に払い出された砂利、砂等の骨材を更に下位の貯蔵室5の骨材貯蔵槽に骨材種毎に分配貯蔵させる分配シュート12を旋回自在に備えている。   The inclined conveyor 8 is formed by winding a belt 10 between a head pulley 9 at a front end portion and a tail pulley (not shown) at a distal end portion, and is used for receiving an aggregate provided with the head pulley 9 in a receiving material chamber 6. It faces the receiving material chute 11. Further, below the receiving chute 11, aggregates such as gravel and sand discharged into the receiving chute 11 are distributed and stored for each aggregate type in the aggregate storage tank of the lower storage chamber 5. A distribution chute 12 is provided so as to be rotatable.

受材室6下位の貯蔵室5には、砂利用の骨材貯蔵槽である砂利貯蔵槽13、砂用の骨材貯蔵槽である砂貯蔵槽14、及びセメント貯蔵用のセメント貯蔵槽15を並設していると共に、水、混和剤用の各貯蔵槽(図示せず)も備えている。また、砂利貯蔵槽13、砂貯蔵槽14の下端部には扇形の排出ゲート16、17をそれぞれ開閉自在に備えていると共に、セメント貯蔵槽15の下端部にはスルースゲートやロータリーバルブ等から成る排出ゲート18を開閉自在に備えている。   The storage room 5 below the receiving room 6 includes a gravel storage tank 13 that is an aggregate storage tank for sand, a sand storage tank 14 that is an aggregate storage tank for sand, and a cement storage tank 15 for cement storage. In addition to being arranged side by side, each storage tank (not shown) for water and admixture is also provided. The gravel storage tank 13 and the sand storage tank 14 are provided with fan-shaped discharge gates 16 and 17 at the lower ends thereof, respectively, and the cement storage tank 15 includes a sluice gate, a rotary valve, and the like. A discharge gate 18 is provided so as to be freely opened and closed.

貯蔵室5下位の計量室4には、砂利計量槽19、砂計量槽20、セメント計量槽21をそれぞれ備えていると共に、水、混和剤用の計量槽(図示せず)も備えている。また、砂利計量槽19、砂計量槽20、セメント計量槽21の下端部にも排出ゲート22、23、24をそれぞれ開閉自在に備えている。   The measuring chamber 4 below the storage chamber 5 includes a gravel measuring tank 19, a sand measuring tank 20, and a cement measuring tank 21, and also includes a measuring tank (not shown) for water and an admixture. In addition, discharge gates 22, 23, and 24 are provided at the lower end portions of the gravel measurement tank 19, the sand measurement tank 20, and the cement measurement tank 21, respectively, so as to be freely opened and closed.

計量室4下位のミキサ室3には、前記各計量槽より払い出される各種コンクリート材料を混練して生コンクリートを製造するミキサ25を備えており、更にその下位の架台2には前記ミキサ25より排出される生コンクリートを一時貯留するコンクリートホッパ26を備えており、一時貯留した生コンクリートをコンクリートホッパ26下端部に備えた排出ゲート(図示せず)の開閉によって適宜排出可能としている。   The mixer chamber 3 below the measuring chamber 4 is provided with a mixer 25 for kneading various concrete materials discharged from the respective measuring tanks to produce ready-mixed concrete. Further, the lower base 2 is discharged from the mixer 25. The concrete hopper 26 that temporarily stores the ready-mixed concrete is provided, and the temporarily stored ready-mixed concrete can be appropriately discharged by opening and closing a discharge gate (not shown) provided at the lower end of the concrete hopper 26.

前記各計量槽とミキサ25との間には、計量槽より払い出される砂利、砂、セメントを予備混合するプレミックスシュート27を必要に応じて備えており、セメント計量槽21から払い出したセメントをセメント放出管28より払い出しながら、砂利計量槽19、砂計量槽20から砂利、砂を払い出し、予備混合させてミキサ25での混練時間を短縮したり、ミキサ25の混練能力を向上させるなどの工夫が施されてプラントの出荷能力を高めている。   Between each said measuring tank and the mixer 25, the premix chute 27 which premixes the gravel discharged from the measuring tank, sand, and cement is provided as needed, and the cement discharged from the cement measuring tank 21 is cemented. While discharging from the discharge pipe 28, gravel and sand are discharged from the gravel measuring tank 19 and sand measuring tank 20 and premixed to shorten the kneading time in the mixer 25 or improve the kneading capacity of the mixer 25. Applied to increase the shipping capacity of the plant.

また、プラント本体7内の防塵対策として、傾斜コンベヤ8から供給される骨材を受け入れる受材シュート11を密閉構造としていると共に、その下位の分配シュート12の旋回範囲周囲も防塵用カーテン29にて囲って密閉している。また、砂利貯蔵槽13、砂貯蔵槽14下端部の排出ゲート16、17の周囲も防塵用のキャンバス30、31で囲って密閉していると共に、砂利計量槽19、砂計量槽20下端部の排出ゲート22、23の周囲も同様にキャンバス32、33にて囲って密閉している。   As a dust-proof measure in the plant body 7, the receiving chute 11 that receives the aggregate supplied from the inclined conveyor 8 has a sealed structure, and the surrounding area of the lower distribution chute 12 is also surrounded by a dust-proof curtain 29. Enclosed and sealed. Further, the periphery of the discharge gates 16 and 17 at the lower end portions of the gravel storage tank 13 and the sand storage tank 14 is enclosed and sealed with dust-proof canvases 30 and 31, and the gravel measurement tank 19 and the sand measurement tank 20 at the lower end portions thereof. Similarly, the periphery of the discharge gates 22 and 23 is enclosed and sealed with canvases 32 and 33.

粉塵となりやすいセメントの流路であるセメント貯蔵槽15からセメント計量槽21、及びセメント放出管28に至るまでは以前より密閉構造を採用しており、セメント貯蔵槽15からセメント計量槽21への材料放出、及びセメント計量槽21からセメント放出管28への材料放出がスムーズに行えるように、セメント計量槽21上端部とセメント放出管28上端部とをエア抜きダクト34にて連結している。また、ミキサ25上部はミキサカバー35にて囲って防塵を図っている。   From the cement storage tank 15 to the cement metering tank 21 and the cement discharge pipe 28, which is a flow path of cement that tends to become dust, a sealed structure has been adopted from before, and the material from the cement storage tank 15 to the cement metering tank 21 is used. The upper end of the cement metering tank 21 and the upper end of the cement discharge pipe 28 are connected by an air vent duct 34 so that the material can be discharged smoothly from the cement metering tank 21 to the cement discharge pipe 28. The upper part of the mixer 25 is surrounded by a mixer cover 35 to prevent dust.

36、37は粉塵吸引用の集塵機であって、そのうちの一基をプラント本体7上部側の砂貯蔵槽14の上位に設置し、この上部集塵機36に連結した吸引ダクト38をプラント本体7上部側の粉塵発生源である、例えば受材シュート11や、分配シュート12周囲の防塵用カーテン29内、及び砂利貯蔵槽13、砂貯蔵槽14下端の排出ゲート16、17周囲のキャンバス30、31内にそれぞれ臨ませており、発生した粉塵を各吸引口38a、38b、38cより吸引して回収させるようにしている一方、別の一基をプラント本体7下部側のミキサ25上位付近に設置し、この下部集塵機37に連結した吸引ダクト39をプラント本体7下部側の粉塵発生源である、例えばミキサ25上部のミキサカバー35内や、セメント計量槽21に備えたエア抜きダクト34にそれぞれ臨ませており、発生した粉塵を各吸引口39d、39eより吸引して回収させるようにしている。   Reference numerals 36 and 37 denote dust collectors for sucking dust, one of which is installed above the sand storage tank 14 on the upper side of the plant main body 7, and a suction duct 38 connected to the upper dust collector 36 is connected to the upper side of the plant main body 7. For example, in the receiving chute 11 and the dustproof curtain 29 around the distribution chute 12 and in the canvas 30 and 31 around the gravel storage tank 13 and the discharge gates 16 and 17 at the lower end of the sand storage tank 14. Each of them is exposed and the generated dust is sucked and collected from the suction ports 38a, 38b, 38c, while another unit is installed near the upper part of the mixer 25 on the lower side of the plant body 7, A suction duct 39 connected to the lower dust collector 37 is provided in a dust cover on the lower side of the plant body 7, for example, in the mixer cover 35 above the mixer 25 or in the cement measuring tank 21. And are respectively to face the air bleeding duct 34, the suction ports 39d of the generated dust, so that is collected by suction from 39e.

また、上部集塵機36の吸引ダクト38の各吸引口38a、38b、38c、及び下部集塵機37の吸引ダクト39の吸引口39d付近にはそれぞれ粉塵センサ40a、40b、40c、及び40dを備えており、各粉塵センサにて検出される粉塵濃度に応じ、或いは粉塵を検出した粉塵センサの数に応じて各集塵機36、37の吸引力をインバータ制御にて調整するように構成している。   In addition, dust sensors 40a, 40b, 40c, and 40d are provided in the vicinity of the suction ports 39a, 38b, and 38c of the suction duct 38 of the upper dust collector 36 and the suction port 39d of the suction duct 39 of the lower dust collector 37, respectively. The suction force of each of the dust collectors 36 and 37 is adjusted by inverter control according to the dust concentration detected by each dust sensor or according to the number of dust sensors that have detected dust.

このうち主にミキサ25内の集塵を行う下部集塵機37においては、ミキサ25と連動して起動すると共に、例えば、先ず約50%程度の吸引力で集塵を開始し、粉塵が大量に舞い上がる水投入完了後から約5秒後には一旦全開の100%の吸引力に切り換えた後、粉塵センサ40dにて検出される粉塵濃度が予め設定した所定値以下まで下がれば再び最初の約50%程度の吸引力に調整して集塵を行う構成としている。なお、インバータ制御にて調整する吸引力の大きさや切り換えのタイミング等は特に上記値に限定するものではなく、発生する粉塵の程度等に応じて適宜設定すればよい。   Of these, the lower dust collector 37 that mainly collects the dust in the mixer 25 is activated in conjunction with the mixer 25 and, for example, starts collecting dust with a suction force of about 50%, and a large amount of dust rises. After about 5 seconds from the completion of the water addition, after switching to a fully open suction force of 100%, if the dust concentration detected by the dust sensor 40d falls below a preset value, the first about 50% again. The dust collection is performed by adjusting the suction force. Note that the magnitude of the suction force adjusted by the inverter control, the switching timing, and the like are not particularly limited to the above values, and may be appropriately set according to the degree of dust generated.

また、セメント計量槽21のエア抜きダクト34に臨ませた吸引ダクト39の吸引口39e付近には粉塵センサを備えずにダクト開閉用のバタフライ弁41を備えており、ダクト内の粉塵濃度に拘わらずセメント計量時にはこのバタフライ弁41を開放してエア抜きダクト34内を流れるセメント粉塵を吸引して除去する一方、計量完了時には前記バタフライ弁41を閉鎖する構成としている。   In addition, a suction valve 39 for opening and closing the duct is provided in the vicinity of the suction port 39e of the suction duct 39 facing the air venting duct 34 of the cement measuring tank 21, and a duct opening / closing butterfly valve 41 is provided, regardless of the dust concentration in the duct. First, when the cement is measured, the butterfly valve 41 is opened to suck and remove the cement dust flowing in the air vent duct 34, while the butterfly valve 41 is closed when the measurement is completed.

一方、受材シュート11や、分配シュート12周囲の防塵用カーテン29内、及び砂利貯蔵槽13、砂貯蔵槽14下端の排出ゲート16、17周囲のキャンバス30、31内の三箇所の集塵を行う上部集塵機36においては、これら三箇所の何れの粉塵センサ40a、40b、40cも粉塵を検出していなければ集塵機36を停止(待機)状態としておき、何れか一箇所でも検出すれば直ちに起動すると共に、その検出した粉塵センサの数が一箇所の場合には、例えば約50%程度の吸引力で、二箇所の場合には約80%程度、三箇所全部で検出した場合には全開の100%の吸引力に調整して集塵を行う構成としている。なお、ここでもインバータ制御にて調整する吸引力の大きさは特に上記値に限定するものではなく、発生する粉塵の程度等に応じて適宜設定すればよい。また、集塵箇所は上記箇所に限定するものではなく、その他の粉塵発生源としてもよいし、また集塵箇所を三箇所ではなく、二箇所、或いは四箇所以上とすることもできる。   On the other hand, the dust collection curtain 29 around the receiving chute 11 and the distribution chute 12 and the dust collection at the gravel storage tank 13 and the discharge gates 16 at the lower end of the sand storage tank 14 and the canvas 30 and 31 around the 17 are collected. In the upper dust collector 36, the dust collector 36 is stopped (standby) if none of these three dust sensors 40a, 40b, 40c has detected dust, and is activated immediately if any one of the dust sensors is detected. In addition, when the number of detected dust sensors is one, for example, the suction force is about 50%, for example, about 80% in the case of two places, and 100 is fully opened when all three places are detected. It is configured to collect dust by adjusting the suction force to 50%. Here, the magnitude of the suction force adjusted by the inverter control is not particularly limited to the above value, and may be set as appropriate according to the degree of dust generated. Further, the dust collection location is not limited to the above location, but may be other dust generation sources, and the dust collection location may be two locations or four or more locations instead of three locations.

また、上部集塵機36では、その下端部と直下の砂貯蔵槽14とを連通管42にて連通させており、該連通管42に備えたバタフライ弁43の開放操作によって集塵機36に回収した粉塵を適宜砂貯蔵槽14に落下投入して還元させる構成としている。一方、下部集塵機37では、その下端部とミキサ25上部に備えたセメント放出管28とを連通管44にて連通させており、該連通管44に備えたバタフライ弁45、46の開放操作と、送出用のエア噴射ノズル47からのエア噴射によって集塵機37に回収した粉塵を1バッチ毎にミキサ25内へ投入して還元させる構成としている。例えば、セメント計量槽21からのセメント払い出しから約5秒後にバタフライ弁45を開放し、続いて約4秒後にバタフライ弁45を閉鎖し、更に約0.5秒後にバタフライ弁46を開いて、同時にエア噴射ノズル47からエアを噴射して連通管44内の粉塵をミキサ25へ還元させ、その約5秒後にバタフライ弁46を閉鎖させ、これをバッチ毎に繰り返す。   Further, in the upper dust collector 36, the lower end portion thereof and the sand storage tank 14 directly below are communicated with each other through a communication pipe 42, and dust collected in the dust collector 36 by an opening operation of the butterfly valve 43 provided in the communication pipe 42 is collected. It is configured so as to drop into the sand storage tank 14 as appropriate for reduction. On the other hand, in the lower dust collector 37, the lower end portion thereof and the cement discharge pipe 28 provided at the upper part of the mixer 25 are communicated with each other through a communication pipe 44, and an operation for opening the butterfly valves 45 and 46 provided in the communication pipe 44; The dust collected in the dust collector 37 by air injection from the air injection nozzle 47 for delivery is put into the mixer 25 for every batch and reduced. For example, the butterfly valve 45 is opened about 5 seconds after the cement is discharged from the cement metering tank 21, and then the butterfly valve 45 is closed after about 4 seconds, and the butterfly valve 46 is opened after about 0.5 seconds. Air is injected from the air injection nozzle 47 to reduce the dust in the communication pipe 44 to the mixer 25. After about 5 seconds, the butterfly valve 46 is closed, and this is repeated for each batch.

なお、このように下部集塵機37で回収した粉塵を1バッチ毎にミキサ25へ還元させるようにしたのは、複数バッチ分の粉塵をまとめてミキサ25へ還元させると生コンクリートの品質に影響を及ぼすおそれがあるためである。一方、上部集塵機36で回収した粉塵は砂貯蔵槽14に還元させるだけなので生コンクリートの品質に影響を及ぼすおそれはなく、還元は任意のタイミングでよく、例えば集塵機36内の粉塵量が多くなればプラントのオペレーターに報知して還元を促すような機能を備えてもよい。   It should be noted that the dust collected by the lower dust collector 37 is reduced to the mixer 25 for each batch as described above. If a plurality of batches of dust are collectively reduced to the mixer 25, the quality of the ready-mixed concrete is affected. This is because there is a fear. On the other hand, the dust collected by the upper dust collector 36 is merely returned to the sand storage tank 14, so there is no risk of affecting the quality of the ready-mixed concrete, and the reduction may be performed at any timing. For example, if the amount of dust in the dust collector 36 increases. You may provide the function which alert | reports to the operator of a plant and promotes reduction | restoration.

48は吸引ダクト38、39から分岐させた分岐ダクトであって、受材室6、貯蔵室5、計量室4、及びミキサ室3にそれぞれ延設していると共に、各分岐ダクト48の先端部には金属片等の重量ダストを分離回収するサイクロン49を介して、各階の床面上等に溜まった骨材やセメント等のダストを吸引して清掃する可撓性の吸引ホース50を連結している一方、各分岐ダクト48の途中にはダクト開閉用のバタフライ弁51を備え、各バタフライ弁51の開放操作によって前記各集塵機36、37の吸引力を利用して吸引ホース50の吸引力を得られるように構成している。52はサイクロン49で分離除去した重量ダスト等を回収する、例えばペール缶等の回収ボックスであり、図2、3に示すように、該回収ボックス52をキャスター付きのベース台53上に着脱自在に備えると共に、回収ボックス52の上部開口部に前記サイクロン49の下部開口部を嵌め入れ、隙間が無いように固定具にて密着固定している。54は吸引ホース50の先端部に適宜取り付ける先端ノズルである。   48 is a branch duct branched from the suction ducts 38 and 39, and extends to the receiving material chamber 6, the storage chamber 5, the measuring chamber 4, and the mixer chamber 3, respectively, and the front end portion of each branch duct 48 Is connected to a flexible suction hose 50 that sucks and cleans dust such as aggregate and cement accumulated on the floor surface of each floor through a cyclone 49 that separates and collects heavy dust such as metal pieces. On the other hand, a butterfly valve 51 for opening and closing the duct is provided in the middle of each branch duct 48, and the suction force of the suction hose 50 is increased by using the suction force of the dust collectors 36 and 37 by opening the butterfly valve 51. It is configured to be obtained. Reference numeral 52 denotes a collection box such as a pail can that collects heavy dust separated and removed by the cyclone 49. As shown in FIGS. 2 and 3, the collection box 52 is detachable on a base table 53 with casters. At the same time, the lower opening of the cyclone 49 is fitted into the upper opening of the collection box 52, and is fixed tightly with a fixture so that there is no gap. Reference numeral 54 denotes a tip nozzle that is appropriately attached to the tip of the suction hose 50.

また、吸引ダクト38、39の途中にもダクト開閉用のバタフライ弁55、56を備えており、各吸引ホース50使用時にはその上流側の分岐ダクト48のバタフライ弁51を開放させると共に、更に上流側の吸引ダクト38、39のバタフライ弁55、56を閉鎖させることで、集塵機36、37からの十分な吸引力が得られるように図っている。なお、各吸引ホース50の把持部等に、分岐ダクト48のバタフライ弁51の開閉操作や、吸引ダクト38、39のバタフライ弁55、56の開閉操作、及び集塵機36、37の起動・停止操作が行えるような操作スイッチを備えれば操作性が向上して便利である。このとき、分岐ダクト48のバタフライ弁51を開放させれば、その上流側の吸引ダクト38、39のバタフライ弁55、56が自動で閉鎖する構成としてもよい。   The suction ducts 38 and 39 are also provided with butterfly valves 55 and 56 for opening and closing the ducts. When each suction hose 50 is used, the butterfly valve 51 of the upstream branch duct 48 is opened, and further upstream By closing the butterfly valves 55 and 56 of the suction ducts 38 and 39, a sufficient suction force from the dust collectors 36 and 37 is obtained. In addition, the opening and closing operation of the butterfly valve 51 of the branch duct 48, the opening and closing operation of the butterfly valves 55 and 56 of the suction ducts 38 and 39, and the start / stop operation of the dust collectors 36 and 37 are performed on the gripping portion of each suction hose 50. If an operation switch that can be used is provided, the operability is improved and it is convenient. At this time, if the butterfly valve 51 of the branch duct 48 is opened, the butterfly valves 55 and 56 of the suction ducts 38 and 39 on the upstream side may be automatically closed.

そして、上記構成の集塵装置を備えた生コンクリート製造プラント1にて生コンクリートを製造するときには、先ず傾斜コンベヤ8にてコンクリート材料である砂利、砂等の骨材を搬送して受材室6の受材シュート11へ送り込み、該受材シュート11から分配シュート12を介して下位の砂利貯蔵槽13、砂貯蔵槽14へ骨材種毎に分配貯蔵させると共に、セメントは供給ポンプ(図示せず)にてセメント貯蔵槽15に投入して貯蔵させ、残りのコンクリート材料である水、混和剤等もそれぞれ各種貯蔵槽(図示せず)に貯蔵させる。そして、各貯蔵槽に貯蔵した砂利、砂、セメント、水、混和剤等の各種コンクリート材料を下位の各計量槽に払い出して所定量ずつ計量し、計量完了後、更に下位のミキサ25に順次投入し、所定時間混練して所望性状の生コンクリートを製造する。   When producing ready-mixed concrete in the ready-mixed concrete manufacturing plant 1 equipped with the dust collector having the above-described configuration, first, aggregates such as gravel and sand, which are concrete materials, are conveyed by the inclined conveyor 8 to receive the receiving chamber 6. The material is distributed to the gravel storage tank 13 and the sand storage tank 14 through the distribution chute 12 from the receiving chute 11 and is distributed and stored for each aggregate type, and the cement is supplied by a supply pump (not shown). ) In the cement storage tank 15, and the remaining concrete materials such as water and admixture are stored in various storage tanks (not shown). Then, various concrete materials such as gravel, sand, cement, water, admixture, etc. stored in each storage tank are dispensed to each lower measurement tank and weighed in a predetermined amount. And kneaded for a predetermined time to produce ready-mixed concrete.

このとき、プラント本体7上部側の受材シュート11や、分配シュート12、及び砂利貯蔵槽13、砂貯蔵槽14下端の排出ゲート16、17では、砂利や砂等の骨材の投入や払い出しの際に粉塵が発生するが、これら各粉塵発生源に臨ませた吸引ダクト38a、38b、38cの何れかの粉塵センサ40a、40b、40cが粉塵を検出すると、停止(待機)状態にある上部集塵機36が直ちに起動すると共に、その検出した粉塵センサの数に応じて集塵機36の吸引力をインバータ制御にて調整した上で集塵を開始する。そして、粉塵を検出する粉塵センサの数が変わればそれに応じて集塵機36の吸引力を調整しつつ、何れの粉塵センサ40a、40b、40cにおいても粉塵を検出しなくなれば停止(待機)状態に戻す。そして、この上部集塵機36にて回収した粉塵は、連通管42のバタフライ弁43の開放操作によって下位の砂貯蔵槽14に適宜落下投入して還元させて再利用する。   At this time, the receiving chute 11 on the upper side of the plant body 7, the distribution chute 12, the gravel storage tank 13, and the discharge gates 16 and 17 at the lower end of the sand storage tank 14 are used to input and discharge aggregates such as gravel and sand. When the dust sensors 40a, 40b, 40c of the suction ducts 38a, 38b, 38c facing each dust generation source detect dust, the upper dust collector is in a stopped (standby) state. 36 starts immediately, and dust collection is started after the suction force of the dust collector 36 is adjusted by inverter control in accordance with the number of detected dust sensors. If the number of dust sensors for detecting dust changes, the suction force of the dust collector 36 is adjusted accordingly, and if no dust is detected in any of the dust sensors 40a, 40b, 40c, the state is returned to the stop (standby) state. . Then, the dust collected by the upper dust collector 36 is appropriately dropped into the lower sand storage tank 14 by the operation of opening the butterfly valve 43 of the communication pipe 42 to be reduced and reused.

一方、プラント本体7下部側のミキサ25では、ミキサ25と連動して下部集塵機37が起動すると共に、インバータ制御にて吸引力を半分程度に調整した上で集塵を開始し、砂利計量槽19や、砂計量槽20、セメント計量槽21等より砂利や砂、セメント等がミキサ25に投入される際に発生する粉塵の集塵に備える。そして、粉塵が大量に舞い上がる材料投入完了後に吸引力を一旦全開まで上げた後、粉塵センサ40dにて検出されるミキサ25内の粉塵濃度が予め設定した所定値以下まで下がってくれば再び半分程度の吸引力に戻し、次バッチの混練に備える。そして、この下部集塵機37にて回収した粉塵は、連通管44のバタフライ弁45、46の開放操作、及びエア噴射ノズル47からのエア噴射によって1バッチ毎にミキサ25へ投入して還元させて再利用する。   On the other hand, in the mixer 25 on the lower side of the plant body 7, the lower dust collector 37 is started in conjunction with the mixer 25, dust collection is started after the suction force is adjusted to about half by inverter control, and the gravel measuring tank 19. In addition, gravel, sand, cement and the like from the sand measuring tank 20 and the cement measuring tank 21 are prepared for collecting dust. Then, after completion of the material addition in which a large amount of dust rises, the suction force is once increased to full open, and if the dust concentration in the mixer 25 detected by the dust sensor 40d falls below a predetermined value set in advance, about half again. To prepare for the next batch kneading. The dust collected by the lower dust collector 37 is thrown into the mixer 25 for every batch by the opening operation of the butterfly valves 45 and 46 of the communication pipe 44 and the air injection from the air injection nozzle 47, and is reduced for recycle. Use.

また、プラント非稼働時等に、何れかの吸引ホース50にてミキサ室3や、計量室4、貯蔵室5、及び受材室6の床面上等を清掃するときには、例えば、ミキサ室3の清掃を行うときには、ミキサ室3に備えた吸引ホース50上流の分岐ダクト48のバタフライ弁51を開放する一方、更にその上流側の吸引ダクト39のバタフライ弁56を閉鎖させた上で集塵機37を起動させ、この集塵機37の吸引力を利用しながら吸引ホース50にてミキサ室3の床面上等に溜まった骨材やセメント等のダストを吸引して清掃を行う。   Further, when the mixer chamber 3, the weighing chamber 4, the storage chamber 5, and the floor surface of the receiving chamber 6 are cleaned with any of the suction hoses 50 when the plant is not in operation, for example, the mixer chamber 3 When the cleaning is performed, the butterfly valve 51 of the branch duct 48 upstream of the suction hose 50 provided in the mixer chamber 3 is opened, and the butterfly valve 56 of the suction duct 39 on the upstream side is further closed, and the dust collector 37 is then opened. The system is activated, and dust such as aggregate and cement collected on the floor surface of the mixer chamber 3 is sucked and cleaned by the suction hose 50 using the suction force of the dust collector 37.

このように、プラント本体7内の粉塵発生源に臨ませた集塵機36、37の吸引ダクト38、39に粉塵センサ40a、40b、40c、40dを備え、該粉塵センサ40a、40b、40c、40dにて検出される粉塵濃度や、粉塵を検出する粉塵センサの数に応じて集塵機36、37の吸引力をインバータ制御にて調整しながら集塵するようにしたので、無駄も少なくて効率よく集塵でき、プラント本体7内を効果的に清浄に維持できる。   As described above, the dust ducts 36 and 37 of the dust collectors 36 and 37 facing the dust generation source in the plant body 7 are provided with the dust sensors 40a, 40b, 40c and 40d, and the dust sensors 40a, 40b, 40c and 40d are provided with the dust sensors 40a, 40b, 40c and 40d. The dust collection is performed by adjusting the suction force of the dust collectors 36 and 37 according to the inverter control according to the dust concentration detected and the number of dust sensors that detect dust. And the inside of the plant body 7 can be effectively maintained clean.

また、集塵機36、37をプラント本体7の上部側と下部側とに二基備え、それぞれの集塵機36、37にてプラント本体7内を分担して集塵させるようにしたので、ミキサ25以外にもプラント本体7内に点在する複数の粉塵発生源を集塵する場合でも、集塵機への過負荷や無用な大型化を防げ、また吸引ダクトも配管し易くなり、無駄も少なくて効率よく集塵できる。更に、集塵機36、37にて回収した粉塵を砂貯蔵槽14やミキサ25へ適宜還元させるようにしたので、粉塵を廃棄処理する手間やコストが省け、有効に再利用することが可能となる。   In addition, two dust collectors 36 and 37 are provided on the upper side and the lower side of the plant main body 7, and the inside of the plant main body 7 is divided and collected by each dust collector 36 and 37. However, even when collecting multiple dust generation sources scattered in the plant body 7, it is possible to prevent overloading and unnecessary enlargement of the dust collector, and to easily install the suction duct, which is efficient and less wasteful. Can dust. Furthermore, since the dust collected by the dust collectors 36 and 37 is appropriately reduced to the sand storage tank 14 and the mixer 25, the labor and cost of disposal of the dust can be saved and the dust can be effectively reused.

また、集塵機36、37の吸引力を利用してプラント本体7内を手軽に清掃可能としたので、低コストでより一層プラント本体7内を効果的に清浄に維持できる。このとき、金属片等の重量ダストを不用意に吸い込んでしまってもサイクロン49にて分離回収でき、集塵機36、37を損傷したり、砂貯蔵槽14やミキサ25に投入されて生コンクリートの品質に影響が出るおそれはない。   Moreover, since the inside of the plant main body 7 can be easily cleaned using the suction force of the dust collectors 36 and 37, the inside of the plant main body 7 can be more effectively maintained at a low cost. At this time, even if heavy dust such as metal pieces is inadvertently sucked, it can be separated and collected by the cyclone 49, and the dust collectors 36 and 37 can be damaged, or can be put into the sand storage tank 14 or the mixer 25 and the quality of ready-mixed concrete. There is no risk of affecting the product.

なお、本実施例においては、集塵機をプラント本体7内の上部側と下部側の二基備えたものを記載したが、例えば受材室6、貯蔵室5、計量室4、ミキサ室3の各階に一基ずつ設置してもよいし、吸引力に十分な余裕があれば一基だけ設置させるようにしてもよい。また、複数の粉塵発生源の集塵を行う集塵機において、粉塵が検出される粉塵センサの数と、それら各粉塵センサにて検出される粉塵濃度の両方を加味した上で集塵機の吸引力を調整させるようにしてもよい。例えば、粉塵が検出される粉塵センサの数が一箇所でも、その粉塵濃度が高ければそれに応じて集塵機の吸引力を増加させる一方、粉塵が検出される粉塵センサの数が複数箇所であっても、それら何れの粉塵濃度とも低ければそれに応じて集塵機の吸引力を低下させる。   In the present embodiment, the dust collector is described as having two upper and lower dust collectors in the plant main body 7. For example, each floor of the receiving chamber 6, the storage chamber 5, the measuring chamber 4, and the mixer chamber 3 is described. May be installed one by one, or only one may be installed if there is a sufficient margin in suction force. In addition, in a dust collector that collects dust from multiple dust sources, adjust the suction force of the dust collector taking into account both the number of dust sensors that detect dust and the dust concentration detected by each dust sensor. You may make it make it. For example, even if the number of dust sensors that detect dust is one, even if the dust concentration is high, the suction force of the dust collector is increased accordingly, while the number of dust sensors that detect dust is multiple. If any of these dust concentrations is low, the suction force of the dust collector is reduced accordingly.

また、粉塵が検出される粉塵センサの数に応じて集塵機の吸引力を調整する場合に、各吸引ダクトの途中にそれぞれ個別にバタフライ弁を備え、粉塵が検出された吸引ダクトのみバタフライ弁を開放させる一方、粉塵が検出されない吸引ダクトはバタフライ弁を閉鎖した状態で集塵するようにすれば、吸引力の無駄が省けてより一層効率よく集塵できる。   In addition, when adjusting the suction force of the dust collector according to the number of dust sensors that detect dust, a separate butterfly valve is provided in the middle of each suction duct, and the butterfly valve is opened only for the suction duct where dust is detected. On the other hand, if the suction duct in which dust is not detected is collected with the butterfly valve closed, dust can be collected more efficiently without waste of suction force.

本発明に係る、生コンクリート製造プラントの集塵装置の概略説明図である。It is a schematic explanatory drawing of the dust collector of the ready-mixed concrete manufacturing plant based on this invention. 吸引ホース使用時の説明図である。It is explanatory drawing at the time of suction hose use. 吸引ホース部の組み立て手順を説明する図である。It is a figure explaining the assembly procedure of a suction hose part.

符号の説明Explanation of symbols

1…生コンクリート製造プラント 2…架台
3…ミキサ室 4…計量室
5…貯蔵室 6…受材室
7…プラント本体 8…傾斜コンベヤ
11…受材シュート 12…分配シュート
13…砂利貯蔵槽(骨材貯蔵槽) 14…砂貯蔵槽(骨材貯蔵槽)
15…セメント貯蔵槽 16、17、22、23…排出ゲート
19…砂利計量槽 20…砂計量槽
21…セメント計量槽 25…ミキサ
28…セメント放出管 29…防塵用カーテン
30、31、32、33…キャンバス
34…エア抜きダクト 35…ミキサカバー
36、37…集塵機 38、39…吸引ダクト
38a、38b、38c、39d、39e…吸引口
40a、40b、40c、40d…粉塵センサ
42、44…連通管
43、45、46…バタフライ弁(開閉弁)
47…エア噴射ノズル
48…分岐ダクト 49…サイクロン
50…吸引ホース 51…バタフライ弁(開閉弁)
DESCRIPTION OF SYMBOLS 1 ... Ready-mixed concrete production plant 2 ... Stand 3 ... Mixer room 4 ... Measurement room 5 ... Storage room 6 ... Receiving room 7 ... Plant body 8 ... Inclined conveyor 11 ... Receiving chute 12 ... Distribution chute 13 ... Gravel storage tank (bone 14 ... Sand storage tank (aggregate storage tank)
DESCRIPTION OF SYMBOLS 15 ... Cement storage tank 16, 17, 22, 23 ... Discharge gate 19 ... Gravel measuring tank 20 ... Sand measuring tank 21 ... Cement measuring tank 25 ... Mixer 28 ... Cement discharge pipe 29 ... Dust-proof curtain 30, 31, 32, 33 ... Canvas 34 ... Air vent duct 35 ... Mixer cover 36, 37 ... Dust collector 38, 39 ... Suction duct 38a, 38b, 38c, 39d, 39e ... Suction port 40a, 40b, 40c, 40d ... Dust sensor 42, 44 ... Communication pipe 43, 45, 46 ... Butterfly valve (open / close valve)
47 ... Air injection nozzle 48 ... Branch duct 49 ... Cyclone 50 ... Suction hose 51 ... Butterfly valve (open / close valve)

Claims (7)

架台上にミキサ室、計量室、貯蔵室、及び受材室を階層状に積み上げて成るプラント本体に粉塵吸引用の集塵機を少なくとも一基以上備え、該集塵機に連結した少なくとも一本以上の吸引ダクトをプラント本体内の粉塵発生源に臨ませると共に、吸引ダクトの吸引口付近には粉塵センサを備え、該粉塵センサにて検出される粉塵濃度に応じて前記集塵機の吸引力をインバータ制御にて調整するように構成したことを特徴とする生コンクリート製造プラントの集塵装置。   At least one suction duct connected to the dust collector having at least one dust collector for sucking dust in the plant body formed by stacking a mixer room, a weighing room, a storage room, and a receiving material room on a gantry. And a dust sensor near the suction port of the suction duct, and the suction force of the dust collector is adjusted by inverter control according to the dust concentration detected by the dust sensor. A dust collector for a ready-mixed concrete production plant, characterized in that it is configured to do so. 集塵機に複数本の吸引ダクトを連結した場合に、粉塵を検出した粉塵センサの数に応じて前記集塵機の吸引力をインバータ制御にて調整するように構成したことを特徴とする請求項1記載の生コンクリート製造プラントの集塵装置。   2. The structure according to claim 1, wherein when a plurality of suction ducts are connected to the dust collector, the suction force of the dust collector is adjusted by inverter control according to the number of dust sensors that detect dust. Dust collector for ready-mixed concrete production plant. プラント本体内に二基の集塵機を備え、そのうちの一基をプラント本体上部側に設置し、この上部集塵機にて主にプラント本体上部側の受材室と貯蔵室の粉塵を吸引させる一方、残りの一基をプラント本体下部側に設置し、この下部集塵機にて主にプラント本体下部側の計量室とミキサ室の粉塵を吸引させるようにしたことを特徴とする請求項1または2記載の生コンクリート製造プラントの集塵装置。   Two dust collectors are installed in the plant body, and one of them is installed on the upper side of the plant body. The upper dust collector mainly sucks the dust in the receiving chamber and storage room on the upper side of the plant body, while the rest 3. The raw material according to claim 1, wherein one of the two is installed on the lower side of the plant main body, and the dust in the measuring chamber and the mixer chamber on the lower side of the plant main body is mainly sucked by the lower dust collector. Dust collector for concrete production plant. 前記集塵機の一基を骨材貯蔵槽の上位に設置すると共に、該集塵機の下端部と骨材貯蔵槽とを連通管にて連通させ、該連通管に備えた開閉弁の開放操作によって回収した粉塵を骨材貯蔵槽に投入して還元させるようにしたことを特徴とする請求項1乃至3記載の生コンクリート製造プラントの集塵装置。   One of the dust collectors is installed above the aggregate storage tank, and the lower end of the dust collector and the aggregate storage tank are communicated with each other through a communication pipe, and collected by opening the on-off valve provided in the communication pipe. 4. A dust collector for a ready-mixed concrete production plant according to claim 1, wherein the dust is put into an aggregate storage tank for reduction. 前記集塵機の一基をミキサの上位に設置すると共に、該集塵機の下端部とミキサとを連通管にて連通させ、該連通管に備えた開閉弁の開放操作によって回収した粉塵を1バッチ毎にミキサへ投入して還元させるようにしたことを特徴とする請求項1乃至4記載の生コンクリート製造プラントの集塵装置。   One dust collector is installed above the mixer, and the lower end of the dust collector and the mixer are communicated with each other through a communication pipe. Dust collected by opening the on-off valve provided in the communication pipe is collected for each batch. 5. The dust collector for a ready-mixed concrete production plant according to claim 1, wherein the dust collector is put into a mixer for reduction. 吸引ダクトから分岐させた分岐ダクトにプラント本体内のダスト清掃用の吸引ホースを連結する一方、前記分岐ダクトの途中にはダクト開閉用の開閉弁を備え、該開閉弁の開放操作によって前記集塵機の吸引力を利用して吸引ホースの吸引力を得るように構成したことを特徴とする請求項1乃至5記載の生コンクリート製造プラントの集塵装置。   While connecting a suction hose for dust cleaning in the plant body to a branch duct branched from the suction duct, an opening / closing valve for opening and closing the duct is provided in the middle of the branch duct, and the opening of the opening / closing valve opens the dust collector. 6. A dust collecting apparatus for a ready-mixed concrete manufacturing plant according to claim 1, wherein the suction force of the suction hose is obtained by using the suction force. 前記分岐ダクトと吸引ホースとの間に、重量ダストを分離回収するサイクロンを介在させたことを特徴とする請求項6記載の生コンクリート製造プラントの集塵装置。   The dust collector of the ready-mixed concrete manufacturing plant according to claim 6, wherein a cyclone for separating and collecting heavy dust is interposed between the branch duct and the suction hose.
JP2008243569A 2008-09-24 2008-09-24 Dust collector of ready mixed concrete-manufacturing plant Pending JP2010076101A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180770A (en) * 2013-03-18 2014-09-29 Oru Japan Kk Dust collector for ready-mixed concrete mixer
KR20160002163U (en) * 2014-12-15 2016-06-23 대우산업주식회사 Batcher plant and batcher plant system having the same
CN108568902A (en) * 2018-05-30 2018-09-25 河南三和水工机械有限公司 A kind of dedusting cabin and the concrete batching and mixing tower using the dedusting cabin
CN110208027A (en) * 2019-07-10 2019-09-06 上海建工材料工程有限公司 The online fault detection method of concrete production equipment and detection system
CN110208028A (en) * 2019-07-10 2019-09-06 上海建工材料工程有限公司 The online fault detection method of concrete production equipment and system based on dust concentration

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JPH08309732A (en) * 1995-05-24 1996-11-26 Eiji Higuchi Method for placing kneading material into concrete mixer, and measuring device used therefor
JP2003191225A (en) * 2001-12-25 2003-07-08 Taiheiyo Kiko Kk Batcher plant for agitator truck
JP2004267889A (en) * 2003-03-07 2004-09-30 Mitsubishi Electric Corp Dust concentration control method in crushing facility, and crushing facility

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JPH04140110A (en) * 1990-10-01 1992-05-14 Daiichi Concrete Kk Kneading mixier of concrete or the like
JPH08309732A (en) * 1995-05-24 1996-11-26 Eiji Higuchi Method for placing kneading material into concrete mixer, and measuring device used therefor
JP2003191225A (en) * 2001-12-25 2003-07-08 Taiheiyo Kiko Kk Batcher plant for agitator truck
JP2004267889A (en) * 2003-03-07 2004-09-30 Mitsubishi Electric Corp Dust concentration control method in crushing facility, and crushing facility

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014180770A (en) * 2013-03-18 2014-09-29 Oru Japan Kk Dust collector for ready-mixed concrete mixer
KR20160002163U (en) * 2014-12-15 2016-06-23 대우산업주식회사 Batcher plant and batcher plant system having the same
KR200480705Y1 (en) * 2014-12-15 2016-06-28 대우산업주식회사 Batcher plant and batcher plant system having the same
CN108568902A (en) * 2018-05-30 2018-09-25 河南三和水工机械有限公司 A kind of dedusting cabin and the concrete batching and mixing tower using the dedusting cabin
CN108568902B (en) * 2018-05-30 2023-12-19 河南三和水工机械有限公司 Dust removal bin and concrete mixing plant using same
CN110208027A (en) * 2019-07-10 2019-09-06 上海建工材料工程有限公司 The online fault detection method of concrete production equipment and detection system
CN110208028A (en) * 2019-07-10 2019-09-06 上海建工材料工程有限公司 The online fault detection method of concrete production equipment and system based on dust concentration

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