JPH0448828Y2 - - Google Patents
Info
- Publication number
- JPH0448828Y2 JPH0448828Y2 JP19534086U JP19534086U JPH0448828Y2 JP H0448828 Y2 JPH0448828 Y2 JP H0448828Y2 JP 19534086 U JP19534086 U JP 19534086U JP 19534086 U JP19534086 U JP 19534086U JP H0448828 Y2 JPH0448828 Y2 JP H0448828Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- air
- tip
- blowing
- pressure
- 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
- 238000007664 blowing Methods 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 5
- 239000011823 monolithic refractory Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000011362 coarse particle Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Landscapes
- Nozzles (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は不定形耐火物およびセメント等の吹付
け用ノズルに関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a nozzle for spraying monolithic refractories, cement, etc.
従来の技術とその問題点
乾式法に適用される不定形耐火物およびセメン
ト等の吹付け用ノズルは、一般に材料ホースを介
して材料タンクに接続され、上記タンク及びホー
スを通じてジエツトエアー圧２〜５Kg／cm2によつ
て搬送されてくる材料にウオータリング部より水
圧２〜４Kg／cm2で水を注入し泥漿化して施工面に
吹付けるような構成になつている。Conventional technology and its problems A nozzle for spraying monolithic refractories, cement, etc. applied to the dry method is generally connected to a material tank via a material hose, and jet air pressure of 2 to 5 kg/kg is applied through the tank and hose. The construction is such that water is injected from the watering section into the material being conveyed at a speed of 2 to 4 kg/cm 2 to form a slurry and sprayed onto the construction surface.
この場合、水と混合された材料はノズルの管内
において、管壁側は摩擦損失があるため、中央と
の平均流速が異なり遅くなる。また材料の粒子の
大きさにより空気抵抗が異なるため管壁側には高
粘性の微粒子が、中央には粗粒子が通過する。そ
のため管壁側を通過する高粘性の微粒物はノズル
先端に於いて施工面まで到達せず途中で落下す
る、所謂ノズルダレ現象を生ずる。ノズルダレを
生ずると、設定した粒度構成と異なる施工体とな
り品質、耐用性が低下する。 In this case, in the nozzle tube, the material mixed with water has friction loss on the tube wall side, so the average flow velocity is different from the center and becomes slower. Furthermore, since air resistance varies depending on the size of the material particles, highly viscous fine particles pass through the tube wall side, and coarse particles pass through the center. Therefore, highly viscous fine particles passing through the pipe wall do not reach the construction surface at the nozzle tip and fall on the way, causing a so-called nozzle sagging phenomenon. When nozzle sag occurs, the finished product differs from the set particle size composition, resulting in a decrease in quality and durability.
ノズルダレを解消する方法としては、材料の粒
度構成を変更し、微粉量を減らす方法、材料の粘
性を低下させる方法、又ノズルにおいては先端部
を絞つて管径を小さくする方法等がある。しか
し、材料の粒度変更、粘性低下は、材料の持つ特
性が変わり、又、吹付時のリバウンドロスの増加
が生ずる。ノズル先端部を絞る方法は、ノズルの
耐用性が著しく低下する。 Methods to eliminate nozzle sagging include changing the particle size structure of the material to reduce the amount of fine powder, reducing the viscosity of the material, and reducing the diameter of the nozzle by constricting the tip. However, changing the particle size and decreasing the viscosity of the material changes the properties of the material and also causes an increase in rebound loss during spraying. The method of constricting the nozzle tip significantly reduces the durability of the nozzle.
この問題を解決するために、ノズルの管壁の周
囲より管内に向けて空気を吹き込み、管壁側を通
る微粉物と中央を通る粗粒子とを再混合すること
が考えられるが、この空気の吹込みには、管内圧
力との圧力差が必要で、高圧空気の吹込みとなる
ため、吹込み後の管内圧力ひいてはノズル先端の
吐出圧が上昇し、リバウンドロス増加原因とな
り、好ましい解決策でない。また空気吹込みによ
る管内圧力上昇分を見込んで、管内圧力を低く設
定しておくことが考えられるが、これでは材料の
搬送に支障が生じ、管詰まりなどのトラブル原因
となる。 In order to solve this problem, it is possible to blow air into the tube from around the tube wall of the nozzle to remix the fine particles passing through the tube wall side with the coarse particles passing through the center. Blow-in requires a pressure difference with the pressure inside the pipe, and since high-pressure air is blown in, the pressure inside the pipe after blowing and the discharge pressure at the nozzle tip increase, causing an increase in rebound loss, which is not a desirable solution. . In addition, it may be possible to set the pressure in the pipe to a low level in consideration of the increase in pressure in the pipe due to air blowing, but this may impede the conveyance of the material and cause problems such as pipe clogging.
本考案は、このような従来の問題点を一掃する
ことを目的としてなされたものである。 The present invention has been made with the aim of eliminating such conventional problems.
問題点を解決するための手段
本考案は、ウオータリング部とノズル先端との
間に、ノズル全周囲よりノズル内に向けて圧搾空
気を吹込むための空気吹込み部を有し、該吹込み
部の吹込み口を基準にして、これより先端側の先
端ノズルの内径は、これより基端側の基端ノズル
部の内径より大きくなつていることを特徴とする
不定形耐火物およびセメント等の吹付け用ノズル
に係る。Means for Solving the Problems The present invention has an air blowing portion between the watering portion and the nozzle tip for blowing compressed air into the nozzle from the entire circumference of the nozzle. A method for blowing monolithic refractories, cement, etc., characterized in that the inner diameter of the tip nozzle on the distal side of the blowing port is larger than the inner diameter of the proximal nozzle portion on the proximal side of the blowing port. Regarding the attachment nozzle.
実施例
以下に本考案の一実施例を添附図面にもとづき
説明すると次の通りである。Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.
不定形耐火物およびセメント等の吹付け用ノズ
ルの本体１はウオータリング部２を有し、該リン
グ部２より常法に従い管内に水を供給し得るよう
になつている。 A main body 1 of the nozzle for spraying monolithic refractories, cement, etc. has a water ring portion 2 through which water can be supplied into a pipe according to a conventional method.
上記ウオータリング部２とノズル本体１の先端
との間に、ノズル内に向けて周囲より空気を吹込
むための空気吹込み部３が設けられる。空気吹込
み部３は上記本体１に形成されたリング状の空気
吹込み口３ａを有し、該吹込み口３ａはその外周
部を囲繞するエアチヤンバー３ｂ及びエア導管３
ｃを介して、圧搾空気の供給部（図示せず）に連
結されている。 An air blowing portion 3 is provided between the watering portion 2 and the tip of the nozzle body 1 for blowing air into the nozzle from the surrounding area. The air blowing section 3 has a ring-shaped air blowing port 3a formed in the main body 1, and the blowing port 3a has an air chamber 3b surrounding the outer circumference thereof and an air conduit 3.
It is connected to a compressed air supply (not shown) via c.
上記吹込み部３の吹込み口３ａを基準にして、
これにより先端側の先端ノズル部１ａの内径は、
これより基端側の基端ノズル部１ｂの内径より大
きくなつている。 Based on the blowing port 3a of the blowing section 3,
As a result, the inner diameter of the tip nozzle portion 1a on the tip side is
This is larger than the inner diameter of the proximal nozzle portion 1b on the proximal side.
先端ノズル部１ａの内径を大きくする理由は、
内径拡大によつて先端ノズル部１ａ、特に空気吹
込み部３の部分の管内圧力を下げ、基端ノズル部
１ｂの管内圧力と同程度の圧力の圧搾空気の使用
によつて、空気吹込み部３よりの空気の吹込みを
可能とするためである。 The reason for increasing the inner diameter of the tip nozzle portion 1a is as follows.
By enlarging the inner diameter, the pressure inside the tube of the tip nozzle section 1a, especially the air blowing section 3, is lowered, and by using compressed air with a pressure similar to the pressure inside the tube of the proximal nozzle section 1b, the pressure inside the air blowing section is lowered. This is to enable air to be blown in from three directions.
このようにすれば、リバウンドロスの原因とな
るような高圧力の圧搾空気を何等使用することな
しに、空気吹込み部３よりの空気の吹込みが可能
となり、この空気の吹込みによつて、管壁側を通
る高粘性微粉物と、管中央部を通る粗粒子との再
混合の目的を達成し得ると共に、空気の吹込みに
よつて管内径拡大による圧力降下分が補なわれ、
ノズル先端よりの吐出圧は設定圧力例えば基端ノ
ズル部１ｂ内と殆んど同圧に復元し、材料の吹付
けをも支障なく達成できる。 In this way, it becomes possible to blow air from the air blowing section 3 without using any high-pressure compressed air that may cause rebound loss, and by blowing this air, , it is possible to achieve the purpose of remixing the highly viscous fine powder passing through the pipe wall side and the coarse particles passing through the center of the pipe, and the pressure drop due to the expansion of the pipe inner diameter is compensated for by blowing air.
The discharge pressure from the nozzle tip is restored to the set pressure, for example, almost the same pressure as in the base end nozzle portion 1b, and the material can be sprayed without any problem.
更に材料の圧送系内は所定設定圧にそのまま維
持されるので、材料の搬送に全く悪影響を与える
虞れもなく、従前通り材料の搬送を安定確実に行
い得る。 Furthermore, since the pressure inside the material pumping system is maintained at a predetermined set pressure, there is no risk of adversely affecting the material transport, and the material can be transported stably and reliably as before.
本考案に於て、空気吹込み部３の空気吹込み口
３ａは図示のように全周に連続していることが好
ましいが、吹込み口３ａより吹出した空気は拡散
するので、小間隔を存して断続するような吹込み
口であつてもよい。吹込み口３ａの開口巾及び先
端ノズル部１ａの内径の拡大巾は、圧搾空気好ま
しくは材料搬送用のジエツトエアーの設定圧例え
ば２〜４Kg／cm2と同程度の圧力の圧搾空気を用い
て、管内に空気の吹込みを行い得て、且つ空気の
吹込みによつて内径拡大による圧力降下分を実質
的に補い得るような範囲内から適宜決定すればよ
く、例えば吹込み口３ａの開口巾は0.5〜1.0mm、
また内径の拡大巾は直径で５〜20％増し程度が適
当である。 In the present invention, it is preferable that the air blowing ports 3a of the air blowing section 3 are continuous all around the circumference as shown in the figure, but since the air blown out from the blowing ports 3a is diffused, it is preferable to have small intervals. It may also be an inlet that is continuous and intermittent. The opening width of the blowing port 3a and the expanded width of the inner diameter of the tip nozzle portion 1a are determined by using compressed air, preferably compressed air at a pressure similar to the set pressure of jet air for material conveyance, for example, 2 to 4 kg/cm 2 . It may be determined as appropriate within a range that allows air to be blown into the pipe and substantially compensates for the pressure drop due to the expansion of the inner diameter, for example, the opening width of the air inlet 3a. is 0.5~1.0mm,
Also, it is appropriate for the inner diameter to increase by about 5 to 20% in diameter.
以下に本考案品の実験例を掲げる。 Examples of experiments using the invented product are listed below.
脱ガス浸積管外面補修に使用する吹付機におい
て、ノズルは本体１の長さ1m、基端ノズル部１
ｂの外径１インチ、肉厚4.5mm、先端ノズル１ａ
の肉厚3.4mmを使用し、吹付機設定条件ジエツト
エアー圧2.0Kg／cm2、タンク圧1.5Kg／cm2、吹込み
圧搾空気2.0Kg／cm2で吹付を行ない、ノズルダレ
を測定した結果吹付量に対し、従来ノズルを使用
した場合は1.3％、また本考案ノズルを使用した
場合は０％であつた。更に施工体の粒度を設定粒
度と比較したら1000μ以上36％、74μ以下32％に
対し、従来ノズルは1000μ以上31％、74μ以下32
％であり、微粉部のロスはなかつた。
In the spraying machine used for repairing the outer surface of the degassing immersion pipe, the nozzle has a length of 1 m in the main body 1, and a base end nozzle part 1.
b outer diameter 1 inch, wall thickness 4.5 mm, tip nozzle 1a
Using a wall thickness of 3.4 mm, spraying was performed under the following conditions: jet air pressure 2.0 Kg/cm 2 , tank pressure 1.5 Kg/cm 2 , compressed air 2.0 Kg/cm 2 , and the nozzle sag was measured. In contrast, it was 1.3% when the conventional nozzle was used, and 0% when the nozzle of the present invention was used. Furthermore, when comparing the particle size of the construction object with the set particle size, 36% is 1000μ or more and 32% is 74μ or less, whereas the conventional nozzle has a particle size of 1000μ or more 31% and 74μ or less 32
%, and there was no loss of fine powder.
効 果
このように本考案に於ては、ノズルダレを、リ
バウンドロスの発生や材料搬送系への悪影響なし
に防止でき、よつて設定した粒度構成通りの施工
体が得られ、施工体の品質、耐用度を向上できる
特長を有する。Effects As described above, in the present invention, nozzle sag can be prevented without causing rebound loss or adversely affecting the material conveyance system, and thus a construction body with the set particle size composition can be obtained, improving the quality of the construction body. It has the feature of improving durability.
第１図は本考案の一実施例を示す、ウオータリ
ングよりノズル先端側の断面図、第２図は本考案
品に於ける材料の移動推定図である。
図に於て、１はノズル本体、２はウオータリン
グ、３は空気吹込み部である。
FIG. 1 is a cross-sectional view of the nozzle tip side from the water ring, showing an embodiment of the present invention, and FIG. 2 is an estimated diagram of material movement in the product of the present invention. In the figure, 1 is a nozzle body, 2 is a water ring, and 3 is an air blowing part.
Claims (1)
ル全周囲よりノズル内に向けて圧搾空気を吹込む
ための空気吹込み部を有し、該吹込み部の吹込み
口を基準にして、これより先端側の先端ノズルの
内径は、これより基端側の基端ノズル部の内径よ
り大きくなつていることを特徴とする不定形耐火
物およびセメント等の吹付け用ノズル。 Between the watering part and the nozzle tip, there is an air blowing part for blowing compressed air into the nozzle from all around the nozzle. A nozzle for spraying monolithic refractories, cement, etc., characterized in that the inner diameter of the tip nozzle is larger than the inner diameter of the proximal nozzle portion on the proximal end side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19534086U JPH0448828Y2 (en) | 1986-12-18 | 1986-12-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19534086U JPH0448828Y2 (en) | 1986-12-18 | 1986-12-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6398758U JPS6398758U (en) | 1988-06-27 |
| JPH0448828Y2 true JPH0448828Y2 (en) | 1992-11-17 |
Family
ID=31153142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19534086U Expired JPH0448828Y2 (en) | 1986-12-18 | 1986-12-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0448828Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4491255B2 (en) * | 2004-02-20 | 2010-06-30 | 株式会社共立合金製作所 | Nozzle device and nozzle member |
-
1986
- 1986-12-18 JP JP19534086U patent/JPH0448828Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6398758U (en) | 1988-06-27 |
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