JPH04357299A - Dust eliminating pipe for spraying method - Google Patents
Dust eliminating pipe for spraying methodInfo
- Publication number
- JPH04357299A JPH04357299A JP3157377A JP15737791A JPH04357299A JP H04357299 A JPH04357299 A JP H04357299A JP 3157377 A JP3157377 A JP 3157377A JP 15737791 A JP15737791 A JP 15737791A JP H04357299 A JPH04357299 A JP H04357299A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- tube
- tip
- discharge
- diameter
- 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.)
- Granted
Links
- 239000000428 dust Substances 0.000 title claims abstract description 24
- 238000005507 spraying Methods 0.000 title claims description 9
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 239000007921 spray Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 241000554155 Andes Species 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Lining And Supports For Tunnels (AREA)
- 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)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、トンネルのような天井
や壁面に、モルタル又はコンクリートと急結材を混合し
て吹付ける工法において粉塵の発生を減少させる技術に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for reducing the generation of dust in a construction method in which a mixture of mortar or concrete and quick-setting material is sprayed onto ceilings and walls of tunnels and the like.
【０００２】0002
【従来の技術とその問題点】現在一般に実施されている
湿式法、乾式法のいずれの吹付工法においても均一な混
合が得られないことが多く、このため吹付面上に縞模様
が現れたり、粉塵が多量に発生する。粉塵の発生を減少
させるために粉塵低減剤を用いることも行われているが
、施工コストが増大するので実際上有効な解決手段では
ない。[Prior art and its problems] In both the wet and dry spraying methods that are currently in common use, uniform mixing is often not achieved, and as a result, striped patterns appear on the sprayed surface. A large amount of dust is generated. Although dust reducing agents have been used to reduce dust generation, this is not a practically effective solution as it increases construction costs.
【０００３】これを改善するため球状混合室とノズルを
組み合わせた混合管が提案されている（特願平２−４１
１３２６）が、混合室内の掃除を頻繁に行なう必要があ
り使用上の環境及び条件が良好でないと作業能率上好ま
しくないことが経験された。In order to improve this, a mixing tube combining a spherical mixing chamber and a nozzle has been proposed (Japanese Patent Application No. 2-41
1326) requires frequent cleaning of the mixing chamber, and it has been experienced that if the environment and conditions for use are not favorable, it is not favorable in terms of work efficiency.
【０００４】0004
【解決しようとする課題】従来試みられてきた、混合部
におけるモルタル又はコンクリートと急結材との混合効
率を向上させることによって発生粉塵を低減させること
は限界があるため、本発明等は混合部と吹付ノズルの吐
出管上に粉塵除去手段を介装させることによって低コス
ト施工を可能にできるものと確信し、種々実験した結果
、本発明に至った。[Problem to be Solved] Since there is a limit to reducing the generated dust by improving the mixing efficiency of mortar or concrete and quick-setting material in the mixing section, which has been attempted in the past, the present invention etc. We believed that low-cost construction could be achieved by interposing a dust removal means on the discharge pipe of the spray nozzle, and after conducting various experiments, we arrived at the present invention.
【０００５】[0005]
【解決手段】本発明粉塵除去管は、吐出管の一次側に接
続するテーパ管開口先端とこれを囲繞し、且つ吐出管の
二次側に向けて縮径し吐出管に接続する胴部と、該胴部
先端と前記テーパ管先端間に放出空間が設けられると共
に該胴部の中心より基部側に接続する吸引管を備えて構
成され、絞り部開口先端直径と吐出管径の比が９０〜３
５であり、胴部の直径は吐出管径の１．２〜３倍として
構成されている。テーパ管の絞り比が９７より大きいと
絞り効果が小さくなり１５以下では材料の詰りが生じ易
くなる。また管径比が約３倍以上になると胴部先端側の
二次側吐出管で閉塞を生じ易くなる。なお、吸引管の直
径はテーパ管先端直径より小さいこと及び取付角度は９
０°以下とすることは勿論であり、吸引負圧は５〜１０
０（ｍｍＨｇ）の範囲とする。テーパ管先端位置は胴部
の一次側から３／４以下で吸引管に達しない位置である
ことが好ましい。更にテーパ部はゆるやかなテーパとす
るのがよい。本発明において胴部の形状は前後非対称形
状であってもよい。除去管は吹付ノズルから５ｍ（Ｌ）
以内が好ましい。[Solution] The dust removal tube of the present invention includes a tapered tube opening tip that connects to the primary side of the discharge tube, a body portion that surrounds the tapered tube opening, and that connects to the discharge tube with a diameter reduced toward the secondary side of the discharge tube. , a discharge space is provided between the tip of the body and the tip of the tapered tube, and a suction tube is connected from the center of the body to the base side, and the ratio of the diameter of the opening of the constriction part to the diameter of the discharge tube is 90. ~3
5, and the diameter of the body is 1.2 to 3 times the diameter of the discharge pipe. If the drawing ratio of the tapered pipe is greater than 97, the drawing effect will be small, and if it is less than 15, clogging of the material will likely occur. Furthermore, if the pipe diameter ratio is about 3 times or more, clogging is likely to occur in the secondary discharge pipe on the distal end side of the body. The diameter of the suction tube must be smaller than the diameter of the tip of the tapered tube, and the installation angle must be 9.
It goes without saying that it should be below 0 degrees, and the suction negative pressure should be 5 to 10 degrees.
The range is 0 (mmHg). It is preferable that the tip of the tapered tube be at a position that is 3/4 or less from the primary side of the body and does not reach the suction tube. Furthermore, it is preferable that the tapered portion has a gentle taper. In the present invention, the shape of the trunk may be asymmetrical in the front and back. The removal pipe is 5m (L) from the spray nozzle.
Preferably within
【０００６】[0006]
【実施例】図１において１はモルタル又はコンクリート
圧送機、２は供給管、３は急結材供給機、４はその供給
管、５はＹ管又はインレットピースなどの混合部、６は
吐出管、７は本発明除去管、８は吹付ノズル、９は吹付
面、６ａは吐出管の一次側、６ｂは吐出管の二次側であ
る。[Example] In Fig. 1, 1 is a mortar or concrete pumping machine, 2 is a supply pipe, 3 is a quick setting material feeder, 4 is its supply pipe, 5 is a mixing part such as a Y pipe or an inlet piece, and 6 is a discharge pipe. , 7 is the removal pipe of the present invention, 8 is a spray nozzle, 9 is a spray surface, 6a is the primary side of the discharge pipe, and 6b is the secondary side of the discharge pipe.
【０００７】除去管の構造は図２の如くであって、１０
はテーパ管のテーパ部、１０ａは開口先端、１１は胴部
、１２はその一次側の基部、１３は先端側、１４は吸引
管であって図示しない多孔フィルタを介して吸引ポンプ
に接続している。１５は胴部先端とテーパ管開口先端間
の放出空間である。The structure of the removal tube is as shown in FIG.
10a is the tapered part of the tapered tube, 10a is the opening tip, 11 is the body part, 12 is the base of the primary side, 13 is the tip side, and 14 is the suction tube, which is connected to the suction pump via a porous filter (not shown). There is. 15 is a discharge space between the tip of the body and the tip of the tapered tube opening.
【０００８】[0008]
【作用】テーパ管開口先端から送出された混練物は放出
空間において体積膨張し、この時周囲の負圧によって混
練物中の粉塵は胴部外周域（負圧域）１６に飛散し吸引
管から抜き出される。[Operation] The kneaded material sent out from the opening tip of the tapered tube expands in volume in the discharge space, and at this time, due to the surrounding negative pressure, the dust in the kneaded material is scattered to the outer circumferential area (negative pressure area) 16 of the body and from the suction tube. being extracted.
【０００９】[0009]
【試験例】使用材料
セメント：普通ポルトランドセメント アンデスセメ
ント株式会社製
砂：新潟県姫川産（５ｍｍ下）
砂利：新潟県姫川産（Ｇｍａｘ １５ｍｍ）急結材：商
品名「デンカナトミック Ｔｙｐｅ−５」 電気化
学工業株式会社製[Test example] Materials used: Cement: Ordinary Portland cement Manufactured by Andes Cement Co., Ltd. Sand: Made in Himekawa, Niigata Prefecture (5mm lower) Gravel: Made in Himekawa, Niigata Prefecture (Gmax 15mm) Rapid setting material: Product name: "Denka Atomic Type-5" Manufactured by Denki Kagaku Kogyo Co., Ltd.
【００１０】単位セメント量＝３６０ｋｇ／ｍ３ 、ｗ
／ｃ＝６０％、ｓ／ａ＝６０％の配合で混練りしたコン
クリートを用い急結材の使用量はセメントに対し５重量
％とし、湿式吹付工法によって表１に示す各種、粉塵除
去管の試験を実施した。試験方法は、高さ４ｍ、幅３ｍ
の模擬トンネル内において、コンクリートを各１ｍ３
吹付け、その時に発生した粉塵量も測定した。コンクリ
ートの圧送管の直径Ｄは６．７ｃｍ、吹付圧３．５ｋｇ
／ｃｍ２ 、吸引圧力５０ｍｍＨｇとした。その結果を
表１に併記する。[0010] Unit amount of cement = 360 kg/m3, w
Using concrete mixed with a ratio of /c = 60% and s/a = 60%, the amount of quick-setting agent used was 5% by weight relative to the cement, and the wet spraying method was used to form various types of dust removal pipes shown in Table 1. A test was conducted. The test method is 4m in height and 3m in width.
1 m3 of concrete in each simulated tunnel.
The amount of dust generated during spraying was also measured. The diameter D of the concrete pressure pipe is 6.7 cm, and the spraying pressure is 3.5 kg.
/cm2, and the suction pressure was 50 mmHg. The results are also listed in Table 1.
【００１１】[0011]
【表１】[Table 1]
【００１２】本発明の粉塵除去管を使用することによっ
て吹付け時に発生する粉塵を大幅に低減することが明ら
かである。It is clear that by using the dust removal tube of the present invention, the dust generated during spraying is significantly reduced.
【００１３】[0013]
【発明の効果】本発明による効果は次の通りである。
１）吹付け時に発生する粉塵を大幅に減少できるので作
業環境を改善することができる。
２）粉塵低減剤などの混和剤を使用しないで低コストで
粉塵の抑制が可能となる。[Effects of the Invention] The effects of the present invention are as follows. 1) Dust generated during spraying can be significantly reduced, improving the working environment. 2) Dust can be suppressed at low cost without using admixtures such as dust reducers.
【図１】本発明粉塵除去管を装着した吹付装置の全体図
[Figure 1] Overall view of a spraying device equipped with the dust removal tube of the present invention
【図２】本発明粉塵除去管の断面図[Figure 2] Cross-sectional view of the dust removal tube of the present invention
６は吐出管 ７は本発明除去管 １０ａは開口先端 １１は胴部 １４は吸引管 6 is the discharge pipe 7 is the removal tube of the present invention 10a is the opening tip 11 is the torso 14 is a suction tube
Claims (2)
合物を送出する吐出管に介装される粉塵除去管であって
、前記吐出管の一次側に接続するテーパ管開口先端とこ
れを囲繞し、且つ吐出管の二次側に向けて縮径して前記
吐出管に接続する胴部と、該胴部先端と前記テーパ管先
端間に放出空間が設けられると共に該胴部の中心より基
部側に接続する吸引管を備えて構成され、前記テーパ管
開口先端直径と吐出管径の比が９０〜３５であり、胴部
の直径は吐出管径の１．２〜３倍として構成されている
ことを特徴とする吹付工法用粉塵除去管。1. A dust removal pipe interposed in a discharge pipe for delivering a mixture of mortar or concrete and a quick-setting material, the dust removal pipe having a tapered pipe opening end connected to the primary side of the discharge pipe and surrounding the same. , and a body portion whose diameter decreases toward the secondary side of the discharge pipe and connects to the discharge pipe, and a discharge space is provided between the tip of the body portion and the tip of the tapered pipe, and a base side from the center of the body portion. The ratio of the diameter of the opening tip of the tapered tube to the diameter of the discharge tube is 90 to 35, and the diameter of the body is 1.2 to 3 times the diameter of the discharge tube. A dust removal tube for spraying method.
３／４以内で且つ吸引管接続部に達しない位置に設定さ
れてなる請求項１記載の粉塵除去管。2. The dust removal tube according to claim 1, wherein the tapered tube opening tip position is set within 3/4 from the primary side of the body and does not reach the suction tube connection portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3157377A JP2825680B2 (en) | 1991-06-03 | 1991-06-03 | Dust removal pipe for spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3157377A JP2825680B2 (en) | 1991-06-03 | 1991-06-03 | Dust removal pipe for spraying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04357299A true JPH04357299A (en) | 1992-12-10 |
| JP2825680B2 JP2825680B2 (en) | 1998-11-18 |
Family
ID=15648329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3157377A Expired - Fee Related JP2825680B2 (en) | 1991-06-03 | 1991-06-03 | Dust removal pipe for spraying method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2825680B2 (en) |
-
1991
- 1991-06-03 JP JP3157377A patent/JP2825680B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2825680B2 (en) | 1998-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS56124465A (en) | Method and apparatus for spraying cement mortar, etc. | |
| ATE258491T1 (en) | METHOD FOR PREPARING A FOAMED PLASTER ARTICLE | |
| IL106556A (en) | Apparatus and method for treating sensitive surfaces | |
| JPH10317671A (en) | Spraying concrete and spraying system | |
| JPH04357299A (en) | Dust eliminating pipe for spraying method | |
| JPS6249964A (en) | Concrete sprayer | |
| JPS63297255A (en) | Dust-suppressing agent | |
| JP2012255307A (en) | Spray system for cement concrete | |
| CN212359794U (en) | Chiseling device with spraying unit | |
| JPH0340977Y2 (en) | ||
| JP2001159239A (en) | Execution method for sprayed concrete | |
| JP3123777B2 (en) | Mixing tube for spraying method | |
| JPS6028848A (en) | Sprayer for preventing dust in natom method | |
| JPS605966A (en) | Addition of liquid mixing agent in spray concrete | |
| CN111946364A (en) | Chiseling device with spraying unit | |
| JPS5738968A (en) | Spray coating method for cement mortar | |
| JPH04360962A (en) | Mixing pipe for spraying construction | |
| JPS5924384Y2 (en) | Inorganic fiber spray gun | |
| JPH0418700Y2 (en) | ||
| JPS57187057A (en) | Method and apparatus for concrete spraying | |
| JP2001000889A (en) | Spray nozzle | |
| JP2002126586A (en) | Spray nozzle, quick-setting cement concrete, and spray method | |
| JP2005097025A (en) | Admixture for sprayable cement, spray material, and spraying work using the same | |
| TW353633B (en) | Process and device for spraying an aqueous sludge onto a wall to form a coating, and coating thus obtained | |
| JPS6133628B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980831 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |