JP4774535B2 - Junction / mixing device and mortar spraying device - Google Patents

Junction / mixing device and mortar spraying device Download PDF

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JP4774535B2
JP4774535B2 JP2004332803A JP2004332803A JP4774535B2 JP 4774535 B2 JP4774535 B2 JP 4774535B2 JP 2004332803 A JP2004332803 A JP 2004332803A JP 2004332803 A JP2004332803 A JP 2004332803A JP 4774535 B2 JP4774535 B2 JP 4774535B2
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cylinder
mortar
cylindrical
mixing device
merging
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克己 小林
一浩 織田
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Taiheiyo Materials Corp
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本発明は、例えばモルタルの吹付けに用いられる急結剤の添加装置として採用できる逆流防止機能を備えた合流・混合装置に関する。   The present invention relates to a merging / mixing device having a backflow preventing function that can be employed as an adding device for a quick setting agent used for spraying mortar, for example.

例えば、ビル等の建築物やトンネル等の構築物に、セメントモルタルやポリマーセメントモルタル等を吹付けることが行われている。尚、吹付けられたモルタル層が流れ落ちないものとする為、モルタルには急結剤などの薬剤が添加されていることが多い。この種の吹付け工法の中、湿式吹付け工法では、例えば掘削を行うトンネル坑外の現場敷地内に設けられたコンクリート製造用プラントでコンクリートを混練りし、混練されたコンクリートをアジテータ車などの運搬手段によってトンネル切羽の後方に設置された吹付けコンクリートシステムまで運搬し、コンクリートポンプ等の供給装置で配管内を圧送し、配管途中に設けられた合流管で他方から圧送された急結剤と混合し、急結性の吹付けコンクリートとしてノズル先端から所定の吹付け圧で吹付けコンクリートを地山面に吹付け、一次覆工としてのコンクリートライニングを形成している。   For example, a cement mortar, a polymer cement mortar, or the like is sprayed on a building such as a building or a structure such as a tunnel. In order to prevent the sprayed mortar layer from flowing down, chemicals such as quick setting agents are often added to the mortar. Among these types of spraying methods, the wet spraying method, for example, mixes concrete in a concrete production plant provided on the site site outside the tunnel mine where excavation is performed, and mixes the mixed concrete with an agitator vehicle or the like. It is transported to the shotcrete system installed behind the tunnel face by means of transportation, pumped inside the pipe with a supply device such as a concrete pump, and the quick setting agent fed from the other side with a confluence pipe provided in the middle of the pipe After mixing, spray concrete is sprayed from the nozzle tip to the ground surface with a predetermined spray pressure as a quick setting spray concrete to form a concrete lining as a primary lining.

このような場合に用いられる急結剤としては、例えばカルシウムアルミネートからなるものや、カルシウムアルミネートを主体としアルカリアルミン酸塩やアルカリ炭酸塩などを含有するものや、カルシウムナトリウムアルミネートからなるものや、カルシウムナトリウムアルミネートを主体としたアルカリアルミン酸塩やアルカリ炭酸塩などを含有するものや、カルシウムナトリウムアルミネート及びカルシウムアルミネートを含まず、アルカリアルミン酸塩、アルカリ炭酸塩等を成分とするもの等が知られている。尚、これらの成分は、セメントの凝結を促進させる働きがある為、空気により圧送され、吹付けコンクリート製造時にセメントモルタルと混合されている。   Examples of the quick setting agent used in such a case include those made of calcium aluminate, those containing calcium aluminate as a main component and containing alkali aluminate or alkali carbonate, and those made of calcium sodium aluminate. In addition, those containing alkali aluminate or alkali carbonate mainly composed of calcium sodium aluminate, calcium calcium aluminate and calcium aluminate are not included, and alkali aluminate, alkali carbonate, etc. are used as components. Things are known. In addition, since these components have a function of accelerating the setting of cement, they are pumped by air and mixed with cement mortar during the production of shotcrete.

又、防水施工においては、高濃度ポリマーエマルジョン（全固形分が６５重量％以上）を含有するポリマーセメントスラリに塩化カルシウム等の多価金属塩を混合し、防水層を形成することも行われている。又、多価金属塩を使用せず、アルキルスルホン酸塩重合樹脂、アルキルベンゼンスルホン酸塩、又はこれらを乳化したエマルジョン等を有機系凝固剤として使用し、セメントなどの水和反応物、超速硬セメント、アルミナセメントを事前混合して吹付ける方法も知られている。又、セメントを３８０〜１０００ｋｇ／ｍ3含むセメントモルタルと、硫酸アルミニウム水和物を主成分とし、跳ね返り防止・増結剤としてセルロース、アクリル、ＳＢＲ、クロロプレン又はスルフォネートメラミン化合物の高分子材料及び必要に応じコロイダルシリカ、シリカヒューム、シリカ微粉末、ベントナイト、被覆炭酸カルシウム又はメタカオリンの無機材料を含む、セメントに対して重量比率３〜１５％の非アルカリ液体急結剤とを含むモルタル等も知られている。 In waterproof construction, a water-resistant layer is formed by mixing a polyvalent metal salt such as calcium chloride with a polymer cement slurry containing a high-concentration polymer emulsion (total solid content is 65% by weight or more). Yes. Also, without using polyvalent metal salts, alkyl sulfonate polymer resins, alkyl benzene sulfonates, or emulsions emulsified with these are used as organic coagulants, and hydrated reaction products such as cement, super-hard cement A method of premixing and spraying alumina cement is also known. Also, a cement mortar containing 380 to 1000 kg / m 3 of cement, a high molecular weight material of cellulose, acrylic, SBR, chloroprene or sulfonate melamine compound as an anti-bounce and binding agent, and a necessary material Depending on the type, mortar containing colloidal silica, silica fume, silica fine powder, bentonite, coated calcium carbonate or metakaolin inorganic material and 3-15% by weight non-alkaline liquid quickener with respect to cement is also known. ing.

そして、上記モルタルを吹付ける装置として、例えば図６に示される如きの装置が提案（特開平１０−２１６６２８号公報）されている。すなわち、硫酸アルミニウム水和物を主成分とし、跳ね返り防止・増結剤としてセルロース、アクリル、ＳＢＲ、クロロプレン又はスルフォネートメラミン化合物の高分子材料及び必要に応じコロイダルシリカ、シリカヒューム、シリカ微粉末、ベントナイト、被覆炭酸カルシウム又はメタカオリンの無機材料を含む、セメントに対して重量比率１０〜３５％の非アルカリ液体急結剤を、ノズル５１へ圧送するための急結剤ポンプ５２と、セメント混和用高濃度ポリマーエマルジョンの固形分とセメントとの重量比率を１５０ 〜２３０％の範囲にて混連したポリマーセメントスラリーをノズル５１へ圧送するための主剤ポンプ５３と、急結剤ポンプ５２及び主剤ポンプ５３に連結され、非アルカリ液体急結剤とポリマーセメントスラリーとを混合し、これらを目的物に吹付けるノズル５１と、急結剤ポンプ５２と主剤ポンプ５３とノズル５１とに連通するコンプレッサ５４とよりなり、主剤ポンプ５３とノズル５１との間にフィルタ５５が設けられているセメントスラリーの吹付け防水用装置が提案されている。   And as an apparatus which sprays the said mortar, an apparatus as shown, for example in FIG. 6 is proposed (Unexamined-Japanese-Patent No. 10-216628). That is, it is mainly composed of aluminum sulfate hydrate, and as a bounce-preventing / bindering agent, a polymer material of cellulose, acrylic, SBR, chloroprene or sulfonate melamine compound and, if necessary, colloidal silica, silica fume, silica fine powder, bentonite A quick-setting agent pump 52 for pumping a non-alkaline liquid quick-setting agent containing an inorganic material of coated calcium carbonate or metakaolin in a weight ratio of 10 to 35% to the cement, and a high concentration for mixing with cement A main agent pump 53 for pumping a polymer cement slurry mixed with a solid content of the polymer emulsion to a cement in a weight ratio of 150 to 230% to the nozzle 51, and a quick setting agent pump 52 and a main agent pump 53. Non-alkaline liquid quencher and polymer cement slurry A nozzle 51 that mixes and sprays these onto the object, and a compressor 54 that communicates with the quick setting agent pump 52, the main agent pump 53, and the nozzle 51, and a filter 55 is provided between the main agent pump 53 and the nozzle 51. An apparatus for spray waterproofing cement slurry has been proposed.

又、図７及び図８に示される如く、圧送機６１に投入された材料を混練りすると共に、圧送機６１から延設されたコンクリート供給管６２を介して混練りコンクリートをノズル６３まで供給するコンクリート供給経路６４と、投入された粉体急結剤に所定量の水を混合して攪拌して急結剤スラリーとし、該急結剤スラリーをコンクリート供給管経路６４まで導く急結剤供給経路６５と、急結剤供給経路６５とコンクリート供給経路６４との連結位置に設けられ、前記急結剤スラリーを前記混練りコンクリートと混合攪拌させる混合攪拌部６６とを備えた吹付けシステムが提案（特開平１０−３１７６７１号公報）されている。   Further, as shown in FIGS. 7 and 8, the material put into the pressure feeder 61 is kneaded, and the kneaded concrete is supplied to the nozzle 63 through the concrete supply pipe 62 extended from the pressure feeder 61. A concrete supply path 64 and a quick setting agent supply path that mixes and stirs a predetermined amount of water with the charged powder quick set agent to form a quick set slurry, and guides the quick set slurry to the concrete supply pipe path 64 65, and a spraying system provided with a mixing stirring unit 66 provided at a connecting position between the quick setting agent supply path 65 and the concrete supply path 64 and mixing and stirring the quick setting agent slurry with the kneaded concrete ( JP-A-10-317671).

又、図９に示される如く、湾曲部８１ａを介して連続する導入部８１ｂと放射部８１ｃとを備えたＬ字状管８１と、先端部８２ａが湾曲部８１ａ内に突出し、その噴霧口が放射部８１ｃの放射口と対向している薬剤噴霧管８２とを備え、薬剤噴霧管８２は圧縮空気口８３と薬剤供給口８４とに連通しているフレッシュコンクリートの吹付ノズル装置が提案（特開平１１−２２３９１号公報）されている。   Further, as shown in FIG. 9, an L-shaped tube 81 having an introduction portion 81b and a radiation portion 81c continuous through a bending portion 81a, and a tip portion 82a project into the bending portion 81a, and the spray port thereof is A spray nozzle device for fresh concrete is proposed which includes a drug spray tube 82 facing the radiation port of the radiating portion 81c, and the drug spray tube 82 communicates with a compressed air port 83 and a drug supply port 84 11-22391).

又、図１０に示される如く、ノズル通路９１の導入部９２から圧入されるフレッシュコンクリート材料又はフレッシュモルタル材料に薬剤を混合せしめて放射部９３の放射口から放出させるフレッシュコンクリートの吹付ノズル装置であって、ノズル通路９１の内方に向かって浮上用気体を噴射する材料浮上手段と、ノズル通路９１の放射部で前記材料の流れを湾曲させるノズル通路湾曲部９４と、放射部９３を通る前記材料内に薬剤を噴霧せしめる薬剤薬剤噴霧管９５とを備えており、ノズル通路９３は浮上用気体流路９６を介して対向する外管９３ａと内管９３ｂとからなり、外管９３ａの先端は内管９３ｂの先端より突出しているフレッシュコンクリートの吹付ノズル装置が提案（特開平１１−１０４５２８号公報）されている。   Further, as shown in FIG. 10, the spray nozzle device for fresh concrete is a mixture of a fresh concrete material or fresh mortar material that is press-fitted from the introduction portion 92 of the nozzle passage 91 and discharged from the radiation port of the radiation portion 93. The material levitation means for injecting the levitation gas toward the inside of the nozzle passage 91, the nozzle passage bending portion 94 for curving the flow of the material at the radiating portion of the nozzle passage 91, and the material passing through the radiating portion 93 And a medicine medicine spraying tube 95 for spraying medicine inside, and the nozzle passage 93 is composed of an outer tube 93a and an inner tube 93b which are opposed to each other via a levitation gas flow path 96, and the tip of the outer tube 93a is an inner part. A spray nozzle device for fresh concrete protruding from the tip of the tube 93b has been proposed (Japanese Patent Laid-Open No. 11-104528).

又、流動性のあるコンクリートと該流動性のあるコンクリート用の薬液が含まれる圧縮空気との混合物を所定方向に供給する薬液ボアヘッドと、この薬液ボアヘッドの前記混合物を供給方向の反対側端部に着脱可能に取り付けられて前記混合物の混合室を形成すると共に、中心部に前記コンクリートの導入用開口部を有し、この導入用開口部の周囲に前記薬液含有圧縮空気を送るための複数個のノズルを形成したノズルプレートと、前記ノズルプレートの前記混合室の反対側であって前記導入用開口部に着脱可能に保持され、前記コンクリートを前記混合室に導入する導入管と、前記ノズルプレートの前記混合室の反対側であって前記導入管の外側の位置に固定され、前記ノズルプレートと前記導入管の周囲との間に、前記薬液含有圧縮空気が循環する循環室を形成すると共に、前記圧縮空気が導入されるエアボアヘッドとを有することを特徴とするコンクリート吐出装置が提案（特開２００１−９６２０５号公報）されている。
特開平１０−２１６６２８号公報 特開平１０−３１７６７１号公報 特開平１１−２２３９１号公報 特開平１１−１０４５２８号公報 特開２００１−９６２０５号公報 Further, a chemical bore head for supplying a mixture of fluid concrete and compressed air containing chemical fluid for the fluid concrete in a predetermined direction, and the mixture of the chemical bore head at the end opposite to the supply direction. A plurality of chambers are provided that are detachably attached to form a mixing chamber for the mixture, and that have an opening for introducing the concrete at the center, and for sending the compressed air containing the chemical solution around the opening for introduction. A nozzle plate in which nozzles are formed, an introduction pipe that is detachably held in the introduction opening on the opposite side of the mixing chamber of the nozzle plate, and introduces the concrete into the mixing chamber; and The chemical solution-containing compressed air is fixed at a position opposite to the mixing chamber and outside the introduction pipe, and between the nozzle plate and the circumference of the introduction pipe. Thereby forming a circulation chamber for circulation, the compressed air concrete discharge apparatus characterized by having a Eaboaheddo that is introduced has been proposed (JP-2001-96205).
JP-A-10-216628 JP-A-10-317671 JP 11-22391 A Japanese Patent Laid-Open No. 11-104528 JP 2001-96205 A

ところで、上記提案されている技術を応用した装置を用いて、急結剤をモルタルに添加し、モルタルの吹付けを試みた。   By the way, using a device to which the above proposed technology is applied, an accelerating agent is added to the mortar and an attempt is made to spray the mortar.

しかしながら、急結剤と圧送空気との合流点において、圧送空気により急結剤が急結剤供給管側に押し戻され（逆流させられ）、急結剤をモルタルに上手く添加するのが困難であった。   However, at the confluence of the quick setting agent and the pumping air, the quick setting agent is pushed back to the quick setting agent supply pipe side by the pumping air (reverse flow), and it is difficult to add the quick setting agent to the mortar well. It was.

そこで、本発明者によって、急結剤と圧送空気との合流点において、圧送空気により急結剤が元に押し戻されないようにする為、図４や図５に示される如くの逆流防止装置（合流・混合装置）を考えた。   Therefore, in order to prevent the quick setting agent from being pushed back by the compressed air at the confluence of the quick setting agent and the pressurized air, the present inventor has a backflow prevention device (as shown in FIGS. 4 and 5). Confluence / mixing device).

図４に示されるものは、急結剤輸送管３１と圧送空気輸送管３２との交差角αを鋭角（例えば、３０°）で構成し、圧送空気が急結剤輸送管３１の側には回り込み難いものとなるようにしたのである。又、急結剤輸送管と圧送空気輸送管との交差点における圧送空気輸送管をＳ字状に曲げたりすることも試みた。   In the configuration shown in FIG. 4, the crossing angle α between the quick setting agent transport pipe 31 and the pressurized air transport pipe 32 is configured as an acute angle (for example, 30 °). It was designed to be difficult to wrap around. In addition, an attempt was made to bend the pressure-feed air transport pipe at the intersection of the quick-setting agent transport pipe and the pressure-feed air transport pipe into an S shape.

しかしながら、この種の手法によっては、圧送空気によりる急結剤の逆流防止効果は満足できるものでなかった。   However, this type of technique cannot satisfy the effect of preventing the backflow of the quick setting agent by the pressure air.

又、図５に示される如く、急結剤輸送管４１と圧送空気輸送管４２との交差部において、案内板（逆流防止板）４３を設けたものを試作した。この案内板４３を設けたものは、逆流防止には効果的であったものの、その製作が大変で、コストが高く付くものであった。又、案内板４３が損傷した場合、その交換作業は大変で、コストが高く付くものであった。   Further, as shown in FIG. 5, a prototype in which a guide plate (backflow prevention plate) 43 was provided at the intersection of the quick setting agent transport pipe 41 and the compressed air transport pipe 42 was manufactured. The one provided with the guide plate 43 was effective in preventing the backflow, but was difficult to manufacture and costly. Further, when the guide plate 43 is damaged, the replacement work is difficult and costly.

従って、本発明が解決しようとする第１の課題は、例えば急結剤の輸送が良好に行われるよう、即ち、逆流防止に効果的な技術を提供することである。   Therefore, the first problem to be solved by the present invention is to provide a technique effective for transporting the quick setting agent, for example, in order to prevent backflow.

本発明が解決しようとする第２の課題は、逆流防止に効果的な技術を低廉なコストで提供でき、実施が簡単な技術を提供することである。   The second problem to be solved by the present invention is to provide a technique that can provide an effective technique for preventing a backflow at a low cost and is easy to implement.

前記の課題は、
第２の筒体部が第１の筒体部に交差・結合された略Ｔ字状筒体部を具備してなり、
前記第２の筒体部の交差・結合位置に対応して前記第１の筒体部の内壁には凹部が形成されてなり、
前記凹部内には、前記第２の筒体部の前記第１の筒体部への結合開口部が閉塞されるよう、かつ、該凹部によって規制を受けて位置ズレが起きないように弾性筒体が嵌め込まれてなり、
前記第１の筒体部側に向けて前記第２の筒体部内に流体が供給された場合、前記供給された流体の圧力によって前記弾性筒体の一部が前記第１の筒体部の内壁から離間する如く変形し、該変形により生じた隙間を介して前記供給流体が前記第２の筒体部から前記第１の筒体部内に流れ込むことが出来るよう構成されてなる
ことを特徴とする合流・混合装置によって解決される。 The above issues are
The second cylindrical part comprises a substantially T-shaped cylindrical part intersecting and coupled to the first cylindrical part,
A concave portion is formed on the inner wall of the first cylindrical portion corresponding to the intersection / joining position of the second cylindrical portion,
In the recess, an elastic cylinder is provided so that the coupling opening of the second cylinder part to the first cylinder part is closed, and the displacement is not restricted due to the restriction by the recess. The body is fitted,
When a fluid is supplied into the second cylindrical portion toward the first cylindrical portion, a part of the elastic cylindrical portion of the first cylindrical portion is caused by the pressure of the supplied fluid. It is configured to be deformed so as to be separated from the inner wall, and configured so that the supply fluid can flow into the first cylindrical body part from the second cylindrical part through a gap generated by the deformation. This is solved by a merging / mixing device.

前記の課題は、
前記の合流・混合装置と、
急結剤供給装置と、
空気圧送コンプレッサと、
モルタル吹付ノズルと、
前記モルタル吹付ノズルにモルタルを供給するモルタル供給装置
とを具備してなるモルタル吹付装置であって、
前記合流・混合装置における略Ｔ字状筒体部の第２の筒体部が前記急結剤供給装置に接続されてなり、
前記合流・混合装置における前記略Ｔ字状筒体部の第１の筒体部の一端側が前記空気圧送コンプレッサに接続されてなり、
前記合流・混合装置における前記略Ｔ字状筒体部の第１の筒体部の他端側が前記モルタル吹付ノズルに接続されてなる
ことを特徴とするモルタル吹付装置によって解決される。 The above issues are
Said merging / mixing device;
A quick setting agent supply device;
A pneumatic feeder,
A mortar spray nozzle;
Mortar supply device for supplying mortar to the mortar spray nozzle
A mortar spraying device comprising:
The second cylinder part of the substantially T-shaped cylinder part in the merging / mixing device is connected to the quick setting agent supply device,
One end side of the first cylinder part of the substantially T-shaped cylinder part in the merging / mixing device is connected to the pneumatic feeding compressor,
The other end side of the first cylinder part of the substantially T-shaped cylinder part in the merging / mixing device is connected to the mortar spray nozzle.
This is solved by a mortar spraying device .

本発明において、特に、前記弾性筒体の内側には該弾性筒体の変形を規制する部材が無いものである。 In the present invention, in particular, there is no member that restricts deformation of the elastic cylinder inside the elastic cylinder .

本発明において、特に、前記弾性筒体の外表面が前記凹部内表面に密着して設けられてなる。本発明において、特に、前記弾性筒体はシリコンゴム製筒体である。 In the present invention, in particular, the outer surface of the elastic cylinder is provided in close contact with the inner surface of the recess . In the present invention, in particular, the elastic cylinder is a cylinder made of silicon rubber .

そして、本発明における第４の筒体は、特に、弾性体で構成されている。   And the 4th cylinder in this invention is especially comprised with the elastic body.

第２の筒体部が第１の筒体部に交差・結合された略Ｔ字状筒体部を具備してなり、前記第２の筒体部の交差・結合位置に対応して前記第１の筒体部の内壁には凹部が形成されてなり、前記凹部内には、前記第２の筒体部の前記第１の筒体部への結合開口部が閉塞されるよう、かつ、該凹部によって規制を受けて位置ズレが起きないように弾性筒体が嵌め込まれてなり、前記第１の筒体部側に向けて前記第２の筒体部内に流体が供給された場合、前記供給された流体の圧力によって前記弾性筒体の一部が前記第１の筒体部の内壁から離間する如く変形し、該変形により生じた隙間を介して前記供給流体が前記第２の筒体部から前記第１の筒体部内に流れ込むことが出来るよう構成されてなるから、前記供給流体を押し戻す（逆流させる）ような事態は起きない。 The second cylindrical portion includes a substantially T-shaped cylindrical portion that is crossed and connected to the first cylindrical portion, and the second cylindrical portion corresponds to the crossing / joining position of the second cylindrical portion. A concave portion is formed on the inner wall of the first cylindrical body portion, and the coupling opening portion of the second cylindrical body portion to the first cylindrical body portion is closed in the concave portion; and When an elastic cylinder is fitted so as not to be displaced due to the restriction by the recess, and fluid is supplied into the second cylinder part toward the first cylinder part side, Due to the pressure of the supplied fluid, a part of the elastic cylinder is deformed so as to be separated from the inner wall of the first cylinder part, and the supply fluid is supplied to the second cylinder through a gap generated by the deformation. since made is configured to be able to flow into the first cylindrical body portion from part pushes back the supply fluid (to reflux) such as State does not occur.

しかも、このような逆流防止機能は、前記凹部内に、前記第２の筒体部の前記第１の筒体部への結合開口部が閉塞されるよう、かつ、該凹部によって規制を受けて位置ズレが起きないように弾性筒体を嵌め込むことで達成できるから、面倒な作業は不要であり、極めて簡単に実施できる。例えば、弾性筒体を挿入するのみの簡単な作業で実施できる。この時、弾性筒体の外径が第１の筒体部の入口部での内径や第１の筒体部の出口部での内径より大きくても、変形は可能であり、よって弾性筒体の挿入作業は容易である。しかも、弾性筒体の外径を第１の筒体部の入口部での内径や第１の筒体部の出口部での内径より大きくしていると、弾性筒体はその範囲内で位置規制を受け、弾性筒体が圧送力で押し流されると言った事態は起き難い。尚、弾性筒体を、単に、ゴムの如きの弾性体で構成と言うだけではなく、シリコンゴムのように剥離性に富む弾性体で構成しておけば、流動する剤が付着し難い。 In addition, such a backflow prevention function is restricted by the recess so that the coupling opening of the second cylinder part to the first cylinder part is closed in the recess. Since this can be achieved by fitting the elastic cylinder so as not to cause misalignment, no troublesome work is required and it can be carried out very easily. For example, it can be carried out with a simple operation of only inserting an elastic cylinder. At this time, even if the outer diameter of the elastic cylinder is larger than the inner diameter at the inlet part of the first cylinder part or the inner diameter at the outlet part of the first cylinder part, the elastic cylinder can be deformed. Is easy to insert. Moreover, when being larger than the inner diameter of the outlet inner diameter and the first cylindrical portion of the outer diameter of the elastic tubular body with a first cylindrical portion of the inlet portion, the position of an elastic cylindrical body includes within its scope subject to regulation, situation in which the said elastic cylindrical body is swept away by the pumping force have difficulty occurred. In addition, if the elastic cylinder is not simply composed of an elastic body such as rubber, but if it is composed of an elastic body rich in peelability such as silicon rubber, it is difficult for a fluidizing agent to adhere.

又、前記弾性筒体の外表面と前記凹部内表面とが密着するよう構成していると、第２の流体が第２の筒体部内に押し戻される恐れが無いので好ましい。前記弾性筒体の外表面と前記凹部内表面とが密着するよう構成するには、例えば第１の筒体部の内壁と弾性筒体の外壁とを略同じ形状・大きさにすることにより密着させる、第１の筒体部の内径よりやや大きな外径の弾性体で構成している弾性筒体を第１の筒体部内に挿入することにより密着させる、又は第１の筒体部の内壁と弾性筒体の外壁との間に弾性体のリングを一つ又は二つ以上設ける等の方法が有る。 Further, it is preferable that the outer surface of the elastic cylinder and the inner surface of the recess are in close contact with each other because there is no possibility that the second fluid is pushed back into the second cylinder. To configure the outer surface of the elastic cylinder and the inner surface of the recess to be in close contact with each other, for example, the inner wall of the first cylinder and the outer wall of the elastic cylinder have substantially the same shape and size. The first cylindrical body part is brought into close contact by inserting an elastic cylindrical body made of an elastic body having an outer diameter slightly larger than the inner diameter of the first cylindrical body part, or the inner wall of the first cylindrical body part There is a method such as providing one or two or more elastic rings between the outer wall of the elastic cylinder.

図１は本発明になる逆流防止機能を奏する合流・混合装置を備えたモルタル吹付装置の全体概略図、図２は本発明の逆流防止機能を備えた合流・混合装置の要部の概略図、図３は本発明の逆流防止機能を備えた合流・混合装置の要部の断面図である。   FIG. 1 is an overall schematic view of a mortar spraying device provided with a merging / mixing device having a backflow preventing function according to the present invention, and FIG. 2 is a schematic diagram of a main part of the merging / mixing device having a backflow preventing function according to the present invention. FIG. 3 is a cross-sectional view of the main part of the merging / mixing apparatus having the backflow prevention function of the present invention.

各図中、１は、セメントや水などの所望の材が混練され、この混練モルタルを吹付ノズル２に供給するモルタル供給装置である。３は、急結剤などの薬剤を吹付ノズル２に供給する薬剤供給装置である。４は、薬剤供給装置３からの薬剤を吹付ノズル２に圧送する為のコンプレッサである。５，６，７，８は、各々、輸送用のパイプである。尚、これ等の部分は、従来からのモルタル吹付装置に採用されている技術を用いることも出来るので、詳細な説明を省略する。   In each figure, 1 is a mortar supply device in which a desired material such as cement or water is kneaded and this kneaded mortar is supplied to the spray nozzle 2. Reference numeral 3 denotes a medicine supply device that supplies medicine such as a quick setting agent to the spray nozzle 2. Reference numeral 4 denotes a compressor for pumping the medicine from the medicine supply device 3 to the spray nozzle 2. 5, 6, 7 and 8 are pipes for transportation. In addition, since these parts can also use the technique employ | adopted for the conventional mortar spraying apparatus, detailed description is abbreviate | omitted.

９はＴ字パイプである。このＴ字パイプ９の各端部９ａ，９ｂ，９ｃの内面にはネジが形成されている。そして、Ｔ字パイプ９の端部９ａはパイプ５と螺合によって連結されており、Ｔ字パイプ９の端部９ｂはパイプ６と螺合によって連結されており、Ｔ字パイプ９の端部９ｃはパイプ７と螺合によって連結されている。従って、コンプレッサ４からのエアは、パイプ５→Ｔ字パイプ９の端部９ａ→Ｔ字パイプ９→Ｔ字パイプ９の端部９ｃ→パイプ７の経路を通り、吹付ノズル２の側に流れて行く。又、薬剤供給装置３からの薬剤は、パイプ６→Ｔ字パイプ９の端部９ｂ→Ｔ字パイプ９→Ｔ字パイプ９の端部９ｃ→パイプ７の経路を通り、吹付ノズル２の側に流れて行く。尚、薬剤供給装置３からの薬剤とコンプレッサ４からのエアとは、Ｔ字パイプ９の端部９ｃ、即ち、Ｔ字パイプ９とパイプ７との螺合部近傍にて合流・混合されることになる。   9 is a T-shaped pipe. Screws are formed on the inner surfaces of the end portions 9a, 9b and 9c of the T-shaped pipe 9. The end 9a of the T-shaped pipe 9 is connected to the pipe 5 by screwing, the end 9b of the T-shaped pipe 9 is connected to the pipe 6 by screwing, and the end 9c of the T-shaped pipe 9 is connected. Is connected to the pipe 7 by screwing. Therefore, the air from the compressor 4 flows through the path of the pipe 5 → the end 9a of the T-shaped pipe 9 → the T-shaped pipe 9 → the end 9c of the T-shaped pipe 9 → the pipe 7 toward the blowing nozzle 2 side. go. Further, the medicine from the medicine supply device 3 passes through the path of the pipe 6 → the end portion 9b of the T-shaped pipe 9 → the T-shaped pipe 9 → the end portion 9c of the T-shaped pipe 9 → the pipe 7 to the spray nozzle 2 side. It flows. The medicine from the medicine supply device 3 and the air from the compressor 4 are merged and mixed in the end portion 9c of the T-shaped pipe 9, that is, in the vicinity of the threaded portion between the T-shaped pipe 9 and the pipe 7. become.

Ｔ字パイプ９の端部９ａや端部９ｃにおける内径は、図３からも明瞭な通り、中央部９ｄにおける内径よりも小さい。すなわち、Ｔ字パイプ９の端部９ａや端部９ｃには段部１０ａ，１０ｃが設けられている。   The inner diameters at the end 9a and the end 9c of the T-shaped pipe 9 are smaller than the inner diameter at the center 9d, as is clear from FIG. That is, step portions 10 a and 10 c are provided at the end 9 a and the end 9 c of the T-shaped pipe 9.

１１は、耐薬品性、特に耐アルカリ性に富み、かつ、剤が付着し難い剥離性に富み、更には弾性を持つシリコンゴム製の円筒状の筒である。この筒１１の外径は、Ｔ字パイプ９の端部９ａの段部１０ａとＴ字パイプ９の端部９ｃの段部１０ｃとの間における中央部９ｄの内径と略同一である。そして、筒１１は、Ｔ字パイプ９の端部９ａの段部１０ａとＴ字パイプ９の端部９ｃの段部１０ｃとの間における中央部９ｄに内挿されている。特に、筒１１の外周壁がＴ字パイプ９の端部９ｂの開口部を閉鎖するが如くに内挿されている。従って、筒１１はＴ字パイプ９の内壁に密着した構造となっている。かつ、筒１１は、段部１０ａ，１０ｃによって規制を受け、位置ずれが起きないようになっている。すなわち、筒１１は段部１０ａと段部１０ｃとの間の中央部９ｄに在るように位置規制を受けている。   11 is a cylindrical cylinder made of silicon rubber which is rich in chemical resistance, particularly alkali resistance, has high peelability to which the agent does not easily adhere, and has elasticity. The outer diameter of the cylinder 11 is substantially the same as the inner diameter of the central portion 9 d between the step portion 10 a of the end portion 9 a of the T-shaped pipe 9 and the step portion 10 c of the end portion 9 c of the T-shaped pipe 9. The cylinder 11 is inserted into a central portion 9 d between the step portion 10 a of the end portion 9 a of the T-shaped pipe 9 and the step portion 10 c of the end portion 9 c of the T-shaped pipe 9. In particular, the outer peripheral wall of the cylinder 11 is inserted so as to close the opening of the end 9 b of the T-shaped pipe 9. Therefore, the cylinder 11 has a structure in close contact with the inner wall of the T-shaped pipe 9. In addition, the cylinder 11 is regulated by the stepped portions 10a and 10c so that no positional deviation occurs. That is, the position of the cylinder 11 is restricted so as to be in the central portion 9d between the step portion 10a and the step portion 10c.

さて、上記した如くに構成させた装置を用いて、モルタルの吹付作業が行われる。
すなわち、モルタル供給装置１からモルタルがパイプ８を経由して吹付ノズル２に供給される。 Now, the mortar spraying operation is performed using the apparatus configured as described above.
That is, mortar is supplied from the mortar supply device 1 to the spray nozzle 2 via the pipe 8.

又、薬剤供給装置３から液状の急結剤が供給される。かつ、コンプレッサ４から空気が圧送される。すなわち、空気は、パイプ５→Ｔ字パイプ９の端部９ａ→Ｔ字パイプ９（筒１１内側）→Ｔ字パイプ９の端部９ｃ→パイプ７の経路を通り、吹付ノズル２の側に送られる。薬剤供給装置３からの急結剤は、パイプ６→Ｔ字パイプ９の端部９ｂ→Ｔ字パイプ９（筒１１外側）→Ｔ字パイプ９の端部９ｃ→パイプ７の経路を通り、吹付ノズル２の側に送られる。この時、Ｔ字パイプ９の端部９ｂから流動して来た急結剤は、筒１１の外周壁に衝突している。この衝突圧力によって筒１１は少し内側に凹む。この凹みによって、筒１１の外壁とＴ字パイプ９の内壁との間には隙間が出来る。そして、この隙間を介して、急結剤はＴ字パイプ９の端部９ｃの側に流動して行く。一方、Ｔ字パイプ９の端部９ａから送り込まれて来た空気は、筒１１の内側を通り抜けて行く。そして、空気と急結剤とは、Ｔ字パイプ９の端部９ｂに在る開口部を通り過ぎた後の位置で、合流し、混ざるようになる。従って、Ｔ字パイプ９の端部９ａから送り込まれて来た空気がＴ字パイプ９の端部９ｂに在る開口部の側に流動して行き、急結剤を逆流させるような事態が引き起こされることは無いものとなる。   A liquid quick setting agent is supplied from the medicine supply device 3. In addition, air is pumped from the compressor 4. That is, air passes through the path of the pipe 5 → the end 9a of the T-shaped pipe 9 → the T-shaped pipe 9 (inside the cylinder 11) → the end 9c of the T-shaped pipe 9 → the pipe 7 and is sent to the blowing nozzle 2 side. It is done. The quick setting agent from the medicine supply device 3 is sprayed through the path of the pipe 6 → the end 9b of the T-shaped pipe 9 → the T-shaped pipe 9 (outside the cylinder 11) → the end 9c of the T-shaped pipe 9 → the pipe 7. It is sent to the nozzle 2 side. At this time, the rapid setting agent flowing from the end 9 b of the T-shaped pipe 9 collides with the outer peripheral wall of the cylinder 11. The cylinder 11 is slightly recessed inward by this collision pressure. This recess creates a gap between the outer wall of the cylinder 11 and the inner wall of the T-shaped pipe 9. Then, the quick setting agent flows toward the end portion 9 c of the T-shaped pipe 9 through this gap. On the other hand, the air sent from the end 9 a of the T-shaped pipe 9 passes through the inside of the cylinder 11. Then, the air and the quick setting agent are merged and mixed at a position after passing through the opening in the end portion 9b of the T-shaped pipe 9. Therefore, the air sent from the end portion 9a of the T-shaped pipe 9 flows toward the opening at the end portion 9b of the T-shaped pipe 9 and causes a situation in which the rapid setting agent flows backward. It will never be done.

特に、筒１１は、ゴムで出来ていることから、恰も、弁のような作用を奏する。すなわち、筒１１内を通り過ぎた空気が逆流（筒１１の外側とＴ字パイプ９の内側との間の隙間を通って逆流）しようとしても、この逆流しようとする空気の量は筒１１内を通って来た空気の量よりも少なく、そうすると筒体１１が大きく凹まされることは無い。従って、筒１１が凹む量は少ないから、筒１１内を通り過ぎた空気が逆流する量は少ない。よって、液状の急結剤が逆流させられることも無い。   In particular, since the cylinder 11 is made of rubber, the rod also acts like a valve. That is, even if the air that has passed through the cylinder 11 flows backward (backflow through the gap between the outer side of the cylinder 11 and the inner side of the T-shaped pipe 9), the amount of air that is going to flow backwards in the cylinder 11. Less than the amount of air that has passed through, the cylinder 11 will not be greatly recessed. Therefore, since the amount of depression of the tube 11 is small, the amount of air that has passed through the tube 11 is small. Therefore, the liquid quick setting agent is not caused to flow backward.

そして、Ｔ字パイプ９の端部９ｃの部分で合流・混合された後、この合流・混合された急結剤は吹付ノズル２の部分にてモルタルに添加され、急結剤添加モルタルは所望の箇所に吹き付けられるものとなる。   Then, after joining and mixing at the end portion 9c of the T-shaped pipe 9, the joined and mixed quick setting agent is added to the mortar at the spray nozzle 2 portion, and the quick setting agent added mortar is a desired mortar. It will be sprayed on the place.

本発明になる合流・混合装置を備えたモルタル吹付装置の全体概略図Overall schematic diagram of a mortar spraying device equipped with a confluence / mixing device according to the present invention 本発明になる合流・混合装置の要部の概略図Schematic of the main part of the merging / mixing device according to the present invention 本発明になる合流・混合装置の要部の断面図Sectional drawing of the principal part of the confluence | merging / mixing apparatus which becomes this invention 合流・混合装置の概略図Schematic diagram of merging / mixing equipment 合流・混合装置の概略図Schematic diagram of merging / mixing equipment 従来のモルタル吹付装置の概略図Schematic of conventional mortar spraying device 従来のモルタル吹付装置の概略図Schematic of conventional mortar spraying device 従来のモルタル吹付装置の概略図Schematic of conventional mortar spraying device 従来のモルタル吹付装置の概略図Schematic of conventional mortar spraying device 従来のモルタル吹付装置の概略図Schematic of conventional mortar spraying device

符号の説明Explanation of symbols

１ モルタル供給装置
２ 吹付ノズル
３ 薬剤供給装置
４ コンプレッサ
５，６，７，８ 輸送用のパイプ
９ Ｔ字パイプ
９ａ，９ｂ，９ｃ Ｔ字パイプの端部
１０ａ，１０ｃ 段部
１１ 筒（第４の筒体）

特許出願人 太平洋マテリアル株式会社
代 理 人 宇 高 克 己
DESCRIPTION OF SYMBOLS 1 Mortar supply device 2 Spray nozzle 3 Chemical supply device 4 Compressor 5, 6, 7, 8 Transport pipe 9 T-shaped pipes 9a, 9b, 9c T-shaped pipe ends 10a, 10c Stepped portion 11 Tube (fourth Cylinder)

Patent Applicant Taiheiyo Material Co., Ltd.
Representative Katsumi Udaka

Claims (5)

第２の筒体部が第１の筒体部に交差・結合された略Ｔ字状筒体部を具備してなり、
前記第２の筒体部の交差・結合位置に対応して前記第１の筒体部の内壁には凹部が形成されてなり、
前記凹部内には、前記第２の筒体部の前記第１の筒体部への結合開口部が閉塞されるよう、かつ、該凹部によって規制を受けて位置ズレが起きないように弾性筒体が嵌め込まれてなり、
前記第１の筒体部側に向けて前記第２の筒体部内に流体が供給された場合、前記供給された流体の圧力によって前記弾性筒体の一部が前記第１の筒体部の内壁から離間する如く変形し、該変形により生じた隙間を介して前記供給流体が前記第２の筒体部から前記第１の筒体部内に流れ込むことが出来るよう構成されてなる
ことを特徴とする合流・混合装置。 The second cylindrical part comprises a substantially T-shaped cylindrical part intersecting and coupled to the first cylindrical part,
A concave portion is formed on the inner wall of the first cylindrical portion corresponding to the intersection / joining position of the second cylindrical portion,
In the recess, an elastic cylinder is provided so that the coupling opening of the second cylinder part to the first cylinder part is closed, and the displacement is not restricted due to the restriction by the recess. The body is fitted,
When a fluid is supplied into the second cylindrical portion toward the first cylindrical portion, a part of the elastic cylindrical portion of the first cylindrical portion is caused by the pressure of the supplied fluid. It is configured to be deformed so as to be separated from the inner wall, and configured so that the supply fluid can flow into the first cylindrical body part from the second cylindrical part through a gap generated by the deformation. A merging / mixing device characterized by that. 前記弾性筒体の内側には該弾性筒体の変形を規制する部材が無い
ことを特徴とする請求項１の合流・混合装置。 The merging / mixing device according to claim 1, wherein a member for restricting deformation of the elastic cylinder is not provided inside the elastic cylinder . 前記弾性筒体の外表面が前記凹部内表面に密着して設けられてなる
ことを特徴とする請求項１又は請求項２の合流・混合装置。 The joining / mixing device according to claim 1 or 2, wherein an outer surface of the elastic cylinder is provided in close contact with an inner surface of the recess . 前記弾性筒体はシリコンゴム製筒体である
ことを特徴とする請求項１〜請求項３いずれかの合流・混合装置。 The joining / mixing device according to any one of claims 1 to 3, wherein the elastic cylinder is a cylinder made of silicon rubber . 請求項１〜請求項４いずれかの合流・混合装置と、
急結剤供給装置と、
空気圧送コンプレッサと、
モルタル吹付ノズルと、
前記モルタル吹付ノズルにモルタルを供給するモルタル供給装置
とを具備してなるモルタル吹付装置であって、
前記合流・混合装置における略Ｔ字状筒体部の第２の筒体部が前記急結剤供給装置に接続されてなり、
前記合流・混合装置における前記略Ｔ字状筒体部の第１の筒体部の一端側が前記空気圧送コンプレッサに接続されてなり、
前記合流・混合装置における前記略Ｔ字状筒体部の第１の筒体部の他端側が前記モルタル吹付ノズルに接続されてなる
ことを特徴とするモルタル吹付装置。 The merging / mixing device according to any one of claims 1 to 4,
A quick setting agent supply device;
A pneumatic feeder,
A mortar spray nozzle;
Mortar supply device for supplying mortar to the mortar spray nozzle
A mortar spraying device comprising:
The second cylinder part of the substantially T-shaped cylinder part in the merging / mixing device is connected to the quick setting agent supply device,
One end side of the first cylinder part of the substantially T-shaped cylinder part in the merging / mixing device is connected to the pneumatic feeding compressor,
The mortar spraying device, wherein the other end side of the first cylindrical body portion of the substantially T-shaped cylindrical body portion in the merging / mixing device is connected to the mortar spraying nozzle .
JP2004332803A 2004-11-17 2004-11-17 Junction / mixing device and mortar spraying device Expired - Fee Related JP4774535B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004332803A JP4774535B2 (en) 2004-11-17 2004-11-17 Junction / mixing device and mortar spraying device

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JP6796377B2 (en) * 2015-12-15 2020-12-09 飛島建設株式会社 Cement mortar spraying method
EP3479893A1 (en) 2017-11-06 2019-05-08 Sulzer Chemtech AG An improved mixer duct and a process of using it
CN113756839A (en) * 2021-09-01 2021-12-07 中铁四局集团有限公司 Vibration-damping synchronous grouting system and grouting method for shield underpass building structure

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JP3989079B2 (en) * 1998-03-27 2007-10-10 株式会社エーアンドエーマテリアル Spray nozzle
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