JPH0340977Y2 - - Google Patents
Info
- Publication number
- JPH0340977Y2 JPH0340977Y2 JP1985086241U JP8624185U JPH0340977Y2 JP H0340977 Y2 JPH0340977 Y2 JP H0340977Y2 JP 1985086241 U JP1985086241 U JP 1985086241U JP 8624185 U JP8624185 U JP 8624185U JP H0340977 Y2 JPH0340977 Y2 JP H0340977Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- spraying
- spray
- water injection
- addition device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 82
- 239000000463 material Substances 0.000 claims description 50
- 238000002347 injection Methods 0.000 claims description 20
- 239000007924 injection Substances 0.000 claims description 20
- 238000005507 spraying Methods 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 17
- 239000000428 dust Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011378 shotcrete Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Nozzles (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Description
（産業上の利用分野）
本考案は、たとえばトンネルライニング等のコ
ンクリート類吹付け工法において好適に使用され
る吹付け材料水添加装置に関する。
（従来の技術）
従来、上記のような吹付け工法においては、搬
送距離が長くとれ、しかも閉塞時の処理が容易で
ある等の利点のために、乾式吹付け工法が広く行
われている。この工法は、空練り材料を圧縮空気
によつて材料供給路内をノズルまで浮遊搬送し、
ノズル付近においてノズルマンのバルブ操作によ
り吹付け材料に水を添加するものである。このた
めの装置としては、たとえば第６図および第７図
に示すようなものがある。１は吹付けノズルを示
し、２は吹付けノズル１と吹付け材料圧送管たと
えばホース３との間に設けられた水添加装置を示
す。水添加装置２は、第６図に最もよく示されて
いるように、環状の水通路４と、この水通路４に
水を供給する配管５と、水通路４から吹付け材料
供給路内に開口し、供給路内を圧送される材料に
水を噴射する複数の水噴射ノズル６を備え、材料
供給路の円周方向における数箇所から水を噴射す
るようになつている。
（考案が解決しようとする問題点）
しかしながら、従来の水添加装置による水噴射
は、水噴射の広がり角θが５〜15゜程度の直進形
のものであつて、材料供給路断面に対して均等に
水を供給できるものではなく、供給路を通過する
材料に対して局部的に水添加できるようにすぎな
かつた。したがつて、一部の材料に対しては水添
加を全く行なうことができず、また一部の材料に
対しては不充分な水添加しか行なうことができ
ず、またある部分の材料に対しては過剰な水添加
を行なつてしまうことが生じた。この水添加の不
均一は、管壁に沿つて搬送されるセメント等の細
粒分に顕著であつた。この結果、コンクリート品
質のばらつきが大となるとともに、はね返り率が
高く、また粉塵の発生が大きい等の問題が生じ
る。
他方、前記従来の水添加装置を、第８図のよう
に、材料供給方向に間隔を置いて複数配設するこ
とが考えられる。しかし、この場合は、水噴射ノ
ズル群の位置が、隣接水添加装置間で周方向に関
して同一であると、水添加装置を通る横断面上に
おいて、水セメント比（Ｗ／Ｃ）が高く材料の密
度として粗の部分が形成され、その後次の水添加
装置の間では水セメント比（Ｗ／Ｃ）が低く材料
の密度が密の部分が形成され、さらに次の水添加
装置の横断面上において水セメント比（Ｗ／Ｃ）
が高く材料の密度が粗の部分が形成され、かくし
て材料の密度に関して粗密状態が交互に現れる。
その結果、モルタル分と骨材分との分離が生じ、
良好な吹付材料を得ることができない。さらに、
材料を閉塞なく材料圧送管または吹付けノズル内
を移送させるためには、内壁に水膜が形成される
ことが重要である。しかるに、第８図の形態で
は、水膜が周方向全体に形成されず、また均一で
もなく、周方向に水噴射ノズル位置に該当する部
分のみに水の膜ができ、結果として材料の閉塞が
生じがちである。
そこで、本考案の目的は、吹付け材料に合つた
量の水を均一にかつ確実に添加することができ、
ノズルマンによるバルブ操作の熟練をさほど必要
とせず、粉塵の発生を最少とし、吹付けコンクリ
ート類の品質のばらつきを小さくし、さらにはね
返りおよび剥脱を少なくすることのできる吹付け
材料水添加装置を提供することにある。他の目的
は、材料の分離がなく、しかも材料を閉塞なく移
送できる装置を提供することにある。
（問題点を解決するための手段）
上記問題点を解決するための本考案は、吹付け
材料供給路の先端近傍に配設され、吹付け機より
供給路内を空気圧送されてきた吹付け材料に対し
て所要量の水を横断面扇形状に噴射する水噴射ノ
ズルを、材料供給方向に間隔をおいて、かつ隣接
する水噴射ノズル間では円周方向における位置を
ずらせて配設したことを特徴とする。
（作用）
本考案によれば、水噴射の形状を扇形状とし、
材料供給路断面に対して水幕を形成することがで
きるので、供給路内を搬送されてくる吹付け材料
に対して均一な水添加を行なうことができる。さ
らに、本考案では、水噴射ノズルを、材料供給方
向に間隔を置いて、かつ隣接する水噴射ノズル間
では円周方向に位置をずらして配設したので、第
９図のように、材料が搬送される過程で、順次周
方向に異なる位置から水噴射ノズルによる水の添
加がなされるので、水添加位置における横断面上
に水が集中して添加される第８図の態様と異な
り、徐々に水が添加されることになり、もつて材
料の搬送方向に関して粗密状態を生じさせない。
したがつて、材料の分離が防止されるとともに、
しかも、供給路の内面において周方向全体にかつ
均一な水膜が形成され、もつて材料の閉塞がなく
なる。さらに、第８図の態様との対比の下では、
後記実施例で示すように、顕著な相違が現れる。
（発明の具体例）
本考案を図面に示す具体例に基いてさらに詳細
に説明する。
まず、第５図によつて、吹付け装置全体の構成
を説明すると、コンクリート材料Ｍは圧送機１０
内に投入され、コンプレツサ１２等の空気圧を受
けて、ホース１４を介して圧送され、必要により
吹付機械１０の個所またはその途中で急結剤１６
等が添加された後、吹付けノズル１から対象面Ｘ
へ吹き付けられる。
このような吹付け装置において、本考案の吹付
け材水添加装置は、第１図〜第４図に示すような
構成とされる。すなわち、吹付け材料供給路の先
端近傍、たとえば吹付けノズル１とホース等の吹
付け材料圧送管３との間に、本考案の水添加装置
２０が設けられる。この水添加装置２０は、材料
供給路内に開口し、供給路内を搬送されてくる吹
付け材料に対して必要量の水を扇形状に噴射する
水噴射ノズル２１と、ノズル２１に連通し水源
（図示せず）からの水を配管２２を介してノズル
に供給するための水通路２３とを基本的に備えて
構成される。２４は水噴射ノズル取付け体であ
る。
本考案において使用される水噴射ノズル２１
は、第３図に示すように、噴射の広がり角θが30
〜110゜、好ましくは45〜80゜、スプレー厚ｔが３
mm〜12mm、より好ましくは５mm〜８mmの扇形状の
水噴射を行なうもので、材料供給路の長手方向に
沿つて多段に設けられる。各水噴射ノズル２１間
(Industrial Field of Application) The present invention relates to a spraying material water addition device that is suitably used in concrete spraying methods such as tunnel lining. (Prior Art) Conventionally, among the above-mentioned spraying methods, the dry spraying method has been widely used due to its advantages such as long conveyance distance and easy treatment in the event of blockage. This method uses compressed air to transport the dry mixed material floating in the material supply path to the nozzle.
Water is added to the sprayed material by the nozzle man's valve operation near the nozzle. Examples of devices for this purpose include those shown in FIGS. 6 and 7. Reference numeral 1 designates a spray nozzle, and reference numeral 2 designates a water addition device provided between the spray nozzle 1 and a spray material pressure pipe, such as a hose 3. As best shown in FIG. 6, the water addition device 2 includes an annular water passage 4, a pipe 5 for supplying water to the water passage 4, and a pipe 5 for supplying water from the water passage 4 into the spray material supply passage. It is equipped with a plurality of water injection nozzles 6 that are open and inject water onto the material being pumped through the supply path, and water is injected from several locations in the circumferential direction of the material supply path. (Problem to be solved by the invention) However, the water injection by the conventional water addition device is of a straight type with a spread angle θ of about 5 to 15 degrees, and is It is not possible to supply water evenly, and water can only be added locally to the material passing through the supply channel. Therefore, it is not possible to add water at all to some materials, only insufficient water can be added to some materials, and it is not possible to add water to some materials. In some cases, excessive water was added. This non-uniformity in water addition was noticeable in fine particles such as cement that were transported along the pipe wall. As a result, problems such as wide variation in concrete quality, high rebound rate, and large dust generation occur. On the other hand, it is conceivable to arrange a plurality of conventional water adding devices at intervals in the material supply direction, as shown in FIG. However, in this case, if the positions of the water injection nozzle groups are the same in the circumferential direction between adjacent water adding devices, the water-cement ratio (W/C) will be high on the cross section passing through the water adding devices. A part with a coarse density is formed, then a part with a low water-cement ratio (W/C) and a dense material is formed between the next water adding devices, and then on the cross section of the next water adding device. Water cement ratio (W/C)
Areas are formed where the material density is high and the density of the material is coarse, thus alternating coarse and dense states with respect to the density of the material.
As a result, separation of mortar and aggregate occurs,
Unable to obtain good spray material. moreover,
In order to transfer the material through the material pumping pipe or spray nozzle without blockage, it is important that a water film is formed on the inner wall. However, in the embodiment shown in FIG. 8, the water film is not formed all over the circumference, nor is it uniform, and the water film is formed only in the area corresponding to the water injection nozzle position in the circumferential direction, resulting in clogging of the material. It tends to occur. Therefore, the purpose of this invention is to be able to uniformly and reliably add water in an amount suitable for the spraying material.
To provide a spraying material water addition device that does not require much skill in valve operation by a nozzleman, minimizes the generation of dust, reduces variations in quality of shotcrete, and further reduces splashing and flaking. There is a particular thing. Another object is to provide an apparatus that does not cause separation of materials and can transport materials without blockage. (Means for Solving the Problems) The present invention for solving the above-mentioned problems is that the spraying material is disposed near the tip of the spraying material supply path, and the spraying material is pneumatically fed through the supply path from the spraying machine. Water injection nozzles that spray the required amount of water onto the material in a fan-shaped cross section are arranged at intervals in the material supply direction, and adjacent water injection nozzles are shifted in position in the circumferential direction. It is characterized by (Function) According to the present invention, the shape of the water jet is fan-shaped,
Since a water curtain can be formed on the cross section of the material supply path, water can be uniformly added to the sprayed material conveyed through the supply path. Furthermore, in the present invention, the water injection nozzles are arranged at intervals in the material supply direction, and the positions of adjacent water injection nozzles are shifted in the circumferential direction, so that the material is During the conveyance process, water is added by water injection nozzles from different positions in the circumferential direction, so unlike the mode shown in Fig. 8 where water is added concentratedly on the cross section at the water addition position, water is added gradually. Since water is added to the material, there will be no unevenness in the material transport direction.
Therefore, material separation is prevented and
Moreover, a uniform water film is formed in the entire circumferential direction on the inner surface of the supply path, and material blockage is eliminated. Furthermore, under comparison with the aspect of FIG. 8,
As shown in the Examples below, significant differences emerge. (Specific Examples of the Invention) The present invention will be explained in more detail based on specific examples shown in the drawings. First, the structure of the entire spraying device will be explained with reference to FIG.
It is fed through a hose 14 under air pressure from a compressor 12, etc., and if necessary, a quick setting agent 16 is added to the spray machine 10 or on the way there.
etc. are added, from the spray nozzle 1 to the target surface
sprayed on. In such a spraying device, the spraying material water addition device of the present invention is constructed as shown in FIGS. 1 to 4. That is, the water addition device 20 of the present invention is provided near the tip of the spray material supply path, for example, between the spray nozzle 1 and the spray material pressure feed pipe 3 such as a hose. The water addition device 20 is connected to a water injection nozzle 21 that opens into the material supply path and injects a necessary amount of water in a fan shape to the sprayed material conveyed through the supply path. It basically includes a water passage 23 for supplying water from a water source (not shown) to the nozzle via piping 22. 24 is a water injection nozzle attachment body. Water injection nozzle 21 used in the present invention
As shown in Figure 3, the injection spread angle θ is 30
~110°, preferably 45-80°, spray thickness t is 3
It sprays water in a fan shape of mm to 12 mm, more preferably 5 mm to 8 mm, and is provided in multiple stages along the longitudinal direction of the material supply path. Between each water injection nozzle 21
【表】【table】
【表】
（考案の効果）
以上から明らかなように、本考案によれば、吹
付け材料に対して均一な水添加を行ない、粉塵の
発生を少なくし、また、空中に浮遊する粉塵を早
急に沈降させ、粉塵の影響を最小とすることがで
きる。また、吹付けコンクリートの品質を向上さ
せ、はね返りおよび剥脱を少なくすることができ
る。さらに、ノズルマンの熟練度に関係なく、上
記のような施工結果を得ることができる。[Table] (Effects of the invention) As is clear from the above, according to the invention, water is uniformly added to the sprayed material, the generation of dust is reduced, and the dust floating in the air is quickly removed. The effect of dust can be minimized. It also improves the quality of shotcrete and reduces splashing and spalling. Furthermore, the above-mentioned construction results can be obtained regardless of the skill level of the nozzleman.
第１図は本考案の水添加装置を使用した吹付け
装置の先端部分を示す断面図、第２図は本考案の
水添加装置における水噴射ノズルの配置の一例
と、配管を示す側面図、第３図は水噴射の扇形パ
ターンを示し、ａは水添加装置の断面から見た
図、ｂは水噴射の横断面図、ｃは水添加装置の長
手方向に沿つて見た図、第４図は水添加装置の横
断面図、第５図は本考案の水添加装置を採用した
吹付け装置の全体構成図、第６図は従来の水添加
装置を使用した吹付け装置の先端部分を示す断面
図、第７図は第６図の水添加装置の横断面図、第
８図は比較例の概要図、第９図は本考案の水添加
態様の概要図である。
１……吹付けノズル、３……吹付け材料圧送
管、２０……水添加装置、２１……水噴射ノズ
ル、２２……配管、２３……水通路、２４……水
噴射ノズル取付け体。
FIG. 1 is a sectional view showing the tip of a spraying device using the water addition device of the present invention, and FIG. 2 is a side view showing an example of the arrangement of water injection nozzles in the water addition device of the present invention and piping. Figure 3 shows a fan-shaped pattern of water jets, where a is a cross-sectional view of the water addition device, b is a cross-sectional view of the water jet, c is a view taken along the longitudinal direction of the water addition device; Figure 5 is a cross-sectional view of the water addition device, Figure 5 is an overall configuration diagram of a spraying device using the water addition device of the present invention, and Figure 6 is the tip of a spraying device using a conventional water addition device. 7 is a cross-sectional view of the water addition device shown in FIG. 6, FIG. 8 is a schematic diagram of a comparative example, and FIG. 9 is a schematic diagram of a water addition mode of the present invention. DESCRIPTION OF SYMBOLS 1... Spraying nozzle, 3... Spraying material pressure feeding pipe, 20... Water addition device, 21... Water injection nozzle, 22... Piping, 23... Water passage, 24... Water injection nozzle attachment body.
Claims (1)
より供給路内を空気圧送されてきた吹付材料に対
して所要量の水を横断面扇形状に噴射する水噴射
ノズルを、材料供給方向に間隔を置いて、かつ隣
接する水噴射ノズル間では円周方向に位置をずら
して配設したことを特徴とする吹付け材料水添加
装置。 A water injection nozzle, which is disposed near the tip of the spray material supply path and injects the required amount of water in a fan-shaped cross section onto the spray material that is pneumatically fed through the supply channel from the spray machine, is installed in the material supply direction. A spraying material water addition device characterized in that water injection nozzles are arranged at intervals and with positions shifted in the circumferential direction between adjacent water injection nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985086241U JPH0340977Y2 (en) | 1985-06-07 | 1985-06-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985086241U JPH0340977Y2 (en) | 1985-06-07 | 1985-06-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61201442U JPS61201442U (en) | 1986-12-17 |
| JPH0340977Y2 true JPH0340977Y2 (en) | 1991-08-28 |
Family
ID=30637364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985086241U Expired JPH0340977Y2 (en) | 1985-06-07 | 1985-06-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0340977Y2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0724525Y2 (en) * | 1988-08-31 | 1995-06-05 | 三和産業株式会社 | Dry mortar and concrete spraying equipment |
| JPH0622666B2 (en) * | 1989-09-28 | 1994-03-30 | 中部電力株式会社 | Suspension preparation device |
| JP2564434B2 (en) * | 1991-07-09 | 1996-12-18 | シューレンベルク ベトン−シュプリッツマシネン ゲーエムベハー | Mixing equipment for dry concrete spraying equipment |
| JP3583107B2 (en) * | 2001-03-05 | 2004-10-27 | 電気化学工業株式会社 | Continuous production equipment for quick setting slurry and spraying method using the same |
| JP4754345B2 (en) * | 2005-12-21 | 2011-08-24 | 電気化学工業株式会社 | Spraying device, spraying method and repair method using the same |
| JP2019210610A (en) * | 2018-05-31 | 2019-12-12 | 有限会社中部植生 | Hydration system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6110672A (en) * | 1984-06-25 | 1986-01-18 | 株式会社 青木建設 | Covering construction method and apparatus |
-
1985
- 1985-06-07 JP JP1985086241U patent/JPH0340977Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6110672A (en) * | 1984-06-25 | 1986-01-18 | 株式会社 青木建設 | Covering construction method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61201442U (en) | 1986-12-17 |
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