JPS6124069B2 - - Google Patents
Info
- Publication number
- JPS6124069B2 JPS6124069B2 JP57074324A JP7432482A JPS6124069B2 JP S6124069 B2 JPS6124069 B2 JP S6124069B2 JP 57074324 A JP57074324 A JP 57074324A JP 7432482 A JP7432482 A JP 7432482A JP S6124069 B2 JPS6124069 B2 JP S6124069B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- lining
- pressure
- resin
- existing
- 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
- 229920005989 resin Polymers 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 15
- 239000012159 carrier gas Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 description 27
- 238000005260 corrosion Methods 0.000 description 17
- 230000007797 corrosion Effects 0.000 description 17
- 239000007789 gas Substances 0.000 description 12
- 239000003595 mist Substances 0.000 description 8
- 230000008439 repair process Effects 0.000 description 7
- 238000011084 recovery Methods 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008674 spewing Effects 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010951 particle size reduction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Description
本発明は、地下に布設されたガス管、水道管な
どの既設管、特に管径の小さい小口径の既設配管
に対し、その管内面に布設状態のままで樹脂のラ
イニング塗膜を形成するように補修する既設管の
内面ライニング補修工法に関するものである。
The present invention is designed to form a resin lining coating on the inner surface of existing pipes such as gas pipes and water pipes installed underground, especially small-diameter existing pipes while the pipes are still installed. This relates to a method for repairing the inner lining of existing pipes.
従来、ガス管、水道管などの地中に布設された
導管、供給管、または屋内配管を、布設状態のま
までその内面から補修する方法が種々提唱されて
いる。その補修工法の１つとして、例えば特開昭
54−31622号公報、特開昭55−39274号公報等にみ
られるように、エポキシ樹脂などの塗料をライニ
ング剤として、これを高圧の圧力空気流と混合さ
せた状態で既設管のパイプ内に圧入し、パイプ内
を高速で流通させてパイプ内壁面に塗膜を形成す
る方法が知られている。
また、他の方法として、その補修対象の既設管
のパイプ内に、入口側では高圧エヤーによりライ
ニング剤を吹込み、出口側に吸引空気流を発生さ
せて、上記ライニング剤を強制吸引排出するよう
にしたものが別に特公昭56−163789号公報によつ
て提案されている。
これらの補修方法において、ライニング剤を管
内に吹込む空気圧は、従来の場合、管内において
２Kg/cm2〜７Kg/cm2程度の高圧であり、また流速も
80m/s〜100m/sの高速であつた。
Conventionally, various methods have been proposed for repairing conduits, supply pipes, or indoor piping installed underground, such as gas pipes and water pipes, from the inside while they are still installed. As one of the repair methods, for example,
As seen in Publication No. 54-31622 and Japanese Patent Application Laid-open No. 55-39274, paints such as epoxy resin are used as a lining agent, and this is mixed with a high-pressure air stream and placed inside the existing pipe. A method is known in which a coating film is formed on the inner wall surface of the pipe by press-fitting the material and flowing it through the pipe at high speed. Another method is to blow lining agent into the existing pipe to be repaired using high-pressure air at the inlet side, and generate a suction air flow at the outlet side to forcibly suction and discharge the lining agent. A similar method has been separately proposed in Japanese Patent Publication No. 163789/1983. In these repair methods, the air pressure used to blow the lining agent into the pipe has traditionally been at a high pressure of about 2Kg/ cm2 to 7Kg/ cm2 , and the flow rate has also been low.
The speed was 80m/s to 100m/s.
ところで、上述の方法によつて補修しようとす
る対象の既設配管は、特にガス配管についていう
と、道路下に布設された導管（本管、支管）より
分岐されて各家庭にガスを供給する「供給管」の
ような比較的に管径が細い既設配管を対象とする
ものであるが、この種の供給管の補修において上
述のように、ライニング剤を高圧で管内に圧速す
る場合には、次のような問題が起る。
すなわち補修の対象管（供給管）には、永年の
布設により管の周壁にピンホール状の腐蝕孔が起
きている場合があり、この孔を閉塞すべく管内面
にライニング補修が行なわれるのであるが、この
場合に、従来の先行技術のように高圧の圧力空気
または高負圧の吸引空気でライニング剤を管内に
流通させる方式では、上述の腐蝕孔より、ライニ
ング剤が管の外に噴出し、吹抜け現象が起ること
から、腐蝕孔を塞ぐようにライニング塗膜を形成
することが不可となる問題があり、また、加えて
腐蝕孔が、圧送空気流または吸引空気流により更
に拡大されて管が破損されてしまうという問題も
起き、補修の意義が失なわれてしまうという不都
合があつた。
By the way, the existing piping that is to be repaired using the above method, especially when it comes to gas piping, is a pipe that is branched off from a conduit (main pipe, branch pipe) laid under the road and supplies gas to each home. This method targets existing piping with a relatively small diameter such as "supply pipes," but when repairing this type of supply pipes, as mentioned above, when applying lining agent at high pressure into the pipes, , the following problems occur. In other words, the pipes to be repaired (supply pipes) may have pinhole-like corrosion holes in the peripheral wall of the pipe due to long-term installation, and lining repairs are performed on the inner surface of the pipe to close these holes. However, in this case, if the lining agent is passed through the pipe using high pressure air or high negative pressure suction air as in the conventional prior art, the lining agent will spray out of the pipe from the corrosion hole mentioned above. Since the blow-through phenomenon occurs, there is a problem in that it is impossible to form a lining coating film to close the corrosion holes, and in addition, the corrosion holes are further enlarged by the pressurized air flow or the suction air flow. There was also the problem that the pipes were damaged, which caused the inconvenience that the purpose of the repair was lost.
本発明は、上述の問題を課題として提案された
もので、補修の対象とする既設管に、仮に腐蝕孔
が生起していても、その腐蝕孔からライニング剤
が吹抜け現象を起したり、また腐蝕孔から地下水
を管内に吸込む等の問題がなく、確実にその腐蝕
孔を塞ぐように管内面に樹脂のライニング塗膜を
形成することができると共に、管のライニング補
修中に、管体に生じた腐蝕孔を拡大させる恐れが
なく、しかも比較的に長い区間にわたつて管内面
に上述のライニング塗膜の形成が行なえる既設管
の内面ライニング補修工法を提供しようとするも
のである。
The present invention was proposed to address the above-mentioned problem. Even if a corrosion hole occurs in an existing pipe to be repaired, the lining agent may blow through from the corrosion hole, or There is no problem such as groundwater being sucked into the pipe through corrosion holes, and a resin lining film can be formed on the inner surface of the pipe to reliably close the corrosion hole, and it also eliminates problems that may occur on the pipe body during pipe lining repair. The purpose of the present invention is to provide a method for repairing the inner lining of an existing pipe, in which the above-mentioned lining coating film can be formed on the inner surface of the pipe over a relatively long section without fear of enlarging corrosion holes.
この目的を達成するため、本発明は、ライニン
グ樹脂を、気流搬送により既設管の管内に流動さ
せて管内面にライニング塗膜を形成するに際し、
既設管の入口側に、上記ライニング樹脂を拡散さ
せた気流の担持ガスを、管内において大気圧に対
し僅かな圧力差をもつ略0.3Kg/cm2程度の低圧の気
流によつて導入し、一方、既設管の出口側にも、
管内において大気圧に対して僅かな圧力差をもつ
略一0.3Kg/cm2程度の低負圧の負圧吸引力を作用さ
せて、これらにより入口側に導入されたライニン
グ樹脂を管内に流動させて管内面に樹脂のライニ
ング塗膜を形成するように補修することことを特
徴とするものである。
In order to achieve this objective, the present invention provides a method for forming a lining coating film on the inner surface of an existing pipe by flowing a lining resin into an existing pipe by air flow conveyance.
A carrier gas containing the lining resin diffused in the airflow is introduced into the inlet side of the existing pipe using a low-pressure airflow of about 0.3Kg/ cm2 , which has a slight pressure difference from the atmospheric pressure inside the pipe. , also on the exit side of the existing pipe,
A low negative pressure suction force of about -0.3 kg/cm 2 with a slight pressure difference from atmospheric pressure is applied inside the pipe, and this causes the lining resin introduced at the inlet side to flow into the pipe. This method is characterized by repairing the pipe by forming a resin lining coating on the inner surface of the pipe.
以下、本発明の工法を、図示の具体例にもとづ
いて説明する。第１図において、符号１は空気源
となるコンプレツサであり、各コンプレツサ１の
圧縮空気出口側がヘツダ２に連通されている。上
記ヘツダ２はガバナ３を介して空気加熱機４に連
通されており、上記空気加熱機４は、ボイラ５よ
り減圧弁６を介して供給された上記蒸気と、上記
ヘツダ２からの圧縮空気との間で熱交換し、例え
ば0.3Kg/cm2程度の低圧の担持ガスを生成するので
ある。上記担持ガスは、気流発生器７を介して所
要の気流形態、例えば渦流となつて樹脂ライニン
グヘツド８へともたらされる。
一方、上記空気加熱機４は、バイパス路９を介
して上記ライニングヘツド８へ加熱空気を流すの
であるが、上記バイパス路９には、エポキシ樹脂
などの熱硬化性樹脂がライニング剤として樹脂注
入手段、例えばタンク１０から供給される。上記
タンク１０から、上記バイパス路９へのライニン
グ剤の供給は、加熱空気中への液滴下の方式ある
いは噴射の方式が採用できる。この実施例では、
圧力調整器１１を介してヘツダ２から供給された
圧縮空気の圧力によつて、タンク１０内から樹脂
を噴射する方式を採用している。また上記ライニ
ング剤は電気ヒータ１２によつてタンク１０内を
加温され、適当な粘度まで下げられている。なお
第１図中、符号１３はガバナ３の下流に設けた安
全弁、１４は流量計、１５は圧力計、１６は温度
計である。
またこの実施例では、気流発生器７の下流にお
いて、研磨剤投入器１７がバルブ１８を介して連
通してあり、上記投入器１７にもヘツダ２から圧
縮空気が供給されるようになつていて、バルブ１
８を開放した時、上記圧縮空気で気流発生器７の
下流に研磨剤を供給できるようになつている。
しかして上記ライニングヘツド８を導管により
補修対象の既設管Ａ（支管および供給管を含む対
象既設管系）の一方の入口側に連通し、上記既設
管Ａの他方の出口側に、導管２０を介して回収器
１９を接続し、さらにその回収器１９の先にバキ
ユームポンプ２１が接続してあり、このバキユー
ムポンプ２１の吸引作用で低負圧を上記既設管Ａ
の出口側に及ぼしている。
これによつて、まず、コンプレツサ１による圧
送作用で、バイパス路９内では加熱空気流の中に
ライニング剤が噴射され、上記空気流によつて搬
送される。上記ライニング剤は、例えば非垂下性
（遥変性）の大きい特性をもつエポキシ樹脂が用
いられ、これは熱硬化性樹脂であつても可使用時
間内であれば固化は起らない。しかして上記のよ
うな特性の樹脂からなるライニング剤は、これが
予熱により低粘度になつていて空気流による流動
性がよく、したがつてライニングヘツド８に入つ
た時、担持ガスにより既設管Ａ内を流通するよう
に搬送され、この搬送過程でライニング剤が既設
管Ａの内壁に付着されて管内面に樹脂のライニン
グ塗膜層Ｂが形成されるものである。
一方、本発明では、既設管Ａの出口側において
管内に、バキユームポンプ２１の働きで低負圧
（例えば−0.3Kg/cm2程度）の負圧吸引力が作用さ
れる。これにより既設管Ａの入口側に導入されて
管内を流動する担持ガスは、運動エネルギが補填
され、更に長い距離、ライニング剤を搬送できる
ようになる。
また、上記吸引力は、担持ガスの流れの方向を
規制することになり、既設管系の他の領域へ担持
ガスが流れ込むことがなく所定のルートに沿つて
担持ガスが流通するようになる。
上述の担持ガスの管内流動において、既設管Ａ
の管体周壁に腐蝕孔が生起していても、その管内
を流通する担持ガスの気流圧力は、前記したよう
に例えば±0.3Kg/cm2以下であるから、低圧であつ
て、上記腐蝕孔から外部にライニング剤が噴出し
たり、また腐蝕孔から外部の地下水を管内に吸込
む等の問題がなく、腐蝕孔をライニング剤で確実
に塞ぐように管内面にライニング塗膜を形成する
ことができる。
なお、この実施例では、ライニング剤を空気流
中に噴射する前に、予めバルブ１８を開いて、気
流発生器７からの担持ガスの流れに対して研磨剤
投入器１７より研磨剤を導入し、これを既設管Ａ
内に導いて、ライニング前処理として既設管Ａの
内面研磨を行つてよい。この研磨剤は、管内壁よ
り除去された錆などと共に回収器１９に回収さ
れ、外部に取出される。
第２図の表は、ライニング剤の粘度とミスト濃
度（ここでは担持ガス中へのライニング剤の分散
度を示す）との関係を示したもので、粘度の低い
ものが採用できれば、ミスト濃度が高められるこ
とを示している。第３図の表は、ミスト濃度とミ
ストの到達距離の関係が、また第４図の表は、到
達距離によるミスト粒径分布の関係が示されてい
る。これらからライニング剤としての樹脂特性お
よびその細粒化を適宜選択することによつて、管
内に吹込まれるライニング剤の搬送長さを延長さ
せることが理解できる。
Hereinafter, the construction method of the present invention will be explained based on specific examples shown in the drawings. In FIG. 1, reference numeral 1 denotes a compressor serving as an air source, and the compressed air outlet side of each compressor 1 is communicated with a header 2. The header 2 is connected to an air heater 4 via a governor 3, and the air heater 4 receives the steam supplied from the boiler 5 through the pressure reducing valve 6 and the compressed air from the header 2. Heat is exchanged between the two to generate a carrier gas at a low pressure of, for example, 0.3 Kg/cm 2 . The carrier gas is brought to the resin lining head 8 via the airflow generator 7 in the desired airflow form, for example a vortex. On the other hand, the air heater 4 flows heated air to the lining head 8 via a bypass path 9. In the bypass path 9, a thermosetting resin such as an epoxy resin is injected as a lining agent. , for example, from the tank 10. The lining agent can be supplied from the tank 10 to the bypass path 9 by dropping the liquid into the heated air or by spraying it. In this example,
A system is adopted in which resin is injected from inside the tank 10 using the pressure of compressed air supplied from the header 2 via the pressure regulator 11. Further, the lining agent is heated in the tank 10 by an electric heater 12 to lower the viscosity to an appropriate level. In FIG. 1, reference numeral 13 is a safety valve provided downstream of the governor 3, 14 is a flow meter, 15 is a pressure gauge, and 16 is a thermometer. Further, in this embodiment, downstream of the airflow generator 7, an abrasive charger 17 is communicated via a valve 18, and compressed air is also supplied from the header 2 to the charger 17. , valve 1
8 is opened, the abrasive can be supplied downstream of the airflow generator 7 with the compressed air. The lining head 8 is connected via a conduit to one inlet side of the existing pipe A to be repaired (the target existing pipe system including branch pipes and supply pipes), and a conduit 20 is connected to the other outlet side of the existing pipe A. A recovery device 19 is connected through the recovery device 19, and a vacuum pump 21 is connected to the end of the recovery device 19, and the suction action of this vacuum pump 21 applies low negative pressure to the existing pipe A.
is exerting on the exit side of the As a result, the lining agent is first injected into the heated air flow in the bypass passage 9 by the pressure feeding action of the compressor 1, and is conveyed by the air flow. The lining agent used is, for example, an epoxy resin that has a high non-sagging property (hardening properties), and even if it is a thermosetting resin, it will not solidify within its usable life. However, the lining agent made of resin with the above-mentioned characteristics has a low viscosity due to preheating and has good fluidity due to air flow. Therefore, when it enters the lining head 8, it is absorbed into the existing pipe A by the supported gas. During this transportation process, the lining agent is attached to the inner wall of the existing pipe A, and a resin lining coating layer B is formed on the inner surface of the pipe. On the other hand, in the present invention, a vacuum suction force of low negative pressure (for example, about -0.3 Kg/cm 2 ) is applied to the inside of the existing pipe A on the exit side by the action of the vacuum pump 21 . As a result, the kinetic energy of the carrier gas introduced into the inlet side of the existing pipe A and flowing inside the pipe is supplemented, and the lining agent can be transported over a longer distance. Further, the suction force restricts the flow direction of the carrier gas, so that the carrier gas can flow along a predetermined route without flowing into other areas of the existing pipe system. In the above-mentioned flow of supported gas in the pipe, the existing pipe A
Even if a corrosion hole occurs in the peripheral wall of the pipe, the pressure of the carrier gas flowing through the pipe is, for example, ±0.3Kg/cm 2 or less as described above, so the pressure is low and the corrosion hole does not occur. There are no problems such as the lining agent spewing out to the outside, or groundwater from outside being sucked into the pipe through the corrosion holes, and a lining coating film can be formed on the inner surface of the pipe to reliably close the corrosion holes with the lining agent. . In this embodiment, before injecting the lining agent into the air stream, the valve 18 is opened in advance, and the abrasive is introduced from the abrasive injector 17 into the flow of the carrier gas from the airflow generator 7. , connect this to the existing pipe A
The inner surface of the existing pipe A may be polished as a pre-lining treatment. This abrasive, along with rust removed from the inner wall of the pipe, is collected in the collector 19 and taken out to the outside. The table in Figure 2 shows the relationship between the viscosity of the lining agent and the mist concentration (here, the degree of dispersion of the lining agent into the carrier gas). It shows that it can be improved. The table in FIG. 3 shows the relationship between the mist concentration and the distance traveled by the mist, and the table in FIG. 4 shows the relationship between the mist particle size distribution depending on the distance traveled. It can be understood that by appropriately selecting the resin properties as a lining agent and its particle size reduction from these, the conveyance length of the lining agent blown into the pipe can be extended.
本発明は、以上に詳述したように、ライニング
樹脂を、担持ガス流によつて既設管の一端開口部
より管内に導入し管内を流動させて管内面に塗膜
を形成するに際し、既設管の入口側に、管内内圧
が大気圧に対して僅かな圧力差をもつ略0.3Kg/cm2
程度の低圧に設定された担持ガスにより上記ライ
ニング樹脂を管内に搬入し、且つ既設管の出口側
に、管内内圧が大気圧に対して僅かな圧力差をも
つ略−0.3Kg/cm2程度の低負圧に設定さた負圧吸引
力を作用させ、これらにより入口側に導入された
ライニング樹脂を管内に流動させて管内面に樹脂
のライニング塗膜を形成するように補修するであ
るから、次の効果が得られる。
(1) まず担持ガス流によるライニング樹脂の管内
流動は、その入口側が大気圧に対して僅かな圧
力差を持つ低正圧（略0.3Kg/cm2程度）の気流に
よつて導入され、また出口側が低負圧（略−
0.3Kg/cm2程度）の負圧吸引力によつ吸引するタ
イプなので、従来の先行技術のような高圧の圧
力空気流または高負圧の吸引空気流によつてラ
イニング樹脂を流動させる場合と異り、その補
修対象の既設管に、仮に腐蝕孔が生起している
ことがあつても、ライニング補修中に、当該腐
蝕孔を拡大して管を破損させるような恐れがな
く、また腐蝕孔から、ライニング剤が管の外に
噴出したり、また管の外から地下水を管内に吸
入するような問題も起らず、腐蝕孔を確実に塞
ぐように管内面に樹脂のライニング塗膜を形成
することができる。
(2) また担持ガスは、補修対象の既設管内におい
て、その入口側では低正圧、出口側では低負圧
であるから、中間が大気圧となり、大気との圧
力差は小さくても管内における絶対圧力差は大
きくなることで、相当の流速が確保され、ライ
ニング剤を拡散した気流の延びが、長く延び
て、所要の区間にわたつて管内面に樹脂のライ
ニング塗膜を形成することができる。
(3) さらに既設管の出口側において吸引方式が併
用されているので、担持ガスは、流れが進行す
るに従つて負圧力が作用し、これによつても、
担持ガス中に拡散されたライニング剤の延びが
長くなる上、且つその担持ガスは、吸引作用に
よつて流れの方向が規制されることで、既設管
中で所望のルートに沿つてライニング塗膜の形
成が達成できる。
As described in detail above, the present invention provides a method for introducing a lining resin into an existing pipe through the opening at one end of the existing pipe using a supported gas flow and causing the lining resin to flow through the pipe to form a coating film on the inner surface of the pipe. On the inlet side of the pipe, the internal pressure is approximately 0.3Kg/cm 2 with a slight pressure difference from atmospheric pressure.
The above-mentioned lining resin is carried into the pipe by a carrier gas set at a relatively low pressure, and at the outlet side of the existing pipe, the inner pressure of the pipe is approximately -0.3 kg/cm 2 with a slight pressure difference from atmospheric pressure. Negative pressure suction force set at a low negative pressure is applied, and the lining resin introduced into the inlet side is caused to flow into the pipe to form a resin lining coating on the inner surface of the pipe for repair. The following effects can be obtained. (1) First, the flow of the lining resin in the pipe due to the supported gas flow is introduced by an air flow with a low positive pressure (approximately 0.3 Kg/cm 2 ) having a slight pressure difference with respect to atmospheric pressure at the inlet side, and The outlet side has low negative pressure (approximately -
Since it is a suction type that uses a negative pressure suction force of about 0.3Kg/cm 2 ), it is different from the case where the lining resin is fluidized by a high pressure air flow or a high negative pressure suction air flow as in the conventional prior art. In contrast, even if a corrosion hole occurs in the existing pipe to be repaired, there is no risk of the corrosion hole expanding and damaging the pipe during lining repair, and the corrosion hole will not be removed. As a result, a resin lining film is formed on the inner surface of the pipe to reliably close corrosion holes without causing problems such as the lining agent spewing out of the pipe or groundwater being sucked into the pipe from outside the pipe. can do. (2) In addition, the supported gas has a low positive pressure at the inlet side and a low negative pressure at the outlet side in the existing pipe to be repaired, so the intermediate pressure is atmospheric pressure, and even if the pressure difference with the atmosphere is small, the pressure inside the pipe is low. By increasing the absolute pressure difference, a considerable flow velocity is secured, and the airflow that diffuses the lining agent extends for a long time, making it possible to form a resin lining film on the inner surface of the pipe over the required section. . (3) Furthermore, since a suction system is also used on the exit side of the existing pipe, negative pressure acts on the supported gas as the flow progresses, and this also causes
The extension of the lining agent diffused in the supported gas becomes longer, and the flow direction of the supported gas is regulated by the suction action, so that the lining coating film is spread along the desired route in the existing pipe. can be achieved.
第１図は本発明に係る工法を具体化した一例の
概略構成図、第２図はライニング剤の粘度とミス
ト濃度との関係を示す図表、第３図はミスト濃度
とミストの到達距離の関係を示す図表、第４図は
到達距離によるミスト粒径分布の関係を示す図表
である。
１……コンプレツサ、２……ヘツダ、３……ガ
バナ、４……空気加熱機、５……ボイラ、６……
減圧弁、７……気流発生器、８……樹脂ライニン
グヘツド、９……バイパス、１０……樹脂タン
ク、１１……圧力調整器、１２……電気モータ、
１３……安全弁、１４……流量計、１５……圧力
計、１６……温度計、１７……研磨剤投入器、１
８……バルブ、１９……回収器、２０……導管、
２１……バキユームポンプ。
Figure 1 is a schematic configuration diagram of an example embodying the construction method according to the present invention, Figure 2 is a chart showing the relationship between the viscosity of the lining agent and the mist concentration, and Figure 3 is the relationship between the mist concentration and the distance traveled by the mist. FIG. 4 is a chart showing the relationship between the mist particle size distribution and the reaching distance. 1... Compressor, 2... Header, 3... Governor, 4... Air heater, 5... Boiler, 6...
Pressure reducing valve, 7... Airflow generator, 8... Resin lining head, 9... Bypass, 10... Resin tank, 11... Pressure regulator, 12... Electric motor,
13... Safety valve, 14... Flow meter, 15... Pressure gauge, 16... Thermometer, 17... Abrasive injector, 1
8... Valve, 19... Recovery device, 20... Conduit,
21...Bakyum pump.
Claims (1)
ガス流によつて既設管の一端開口部より管内に導
入し当該管内を流動させて管内面に塗膜を形成す
るに際し、 既設管の入口側に、管内内圧が大気圧に対して
僅かな圧力差をもつ略0.3Kg/cm2程度の低圧に設定
された担持ガス流により上記ライニング樹脂を管
内に搬入し、 且つ既設管の出口側に、管内内圧が大気圧に対
して僅かな圧力差をもつ略−0.3Kg/cm2程度の低負
圧に設定された負圧吸引力を作用させ、 これらにより入口側に導入されたライニング樹
脂を管内に流動させて管内面に樹脂のライニング
塗膜を形成するように補修することを特徴とする
既設管の内面ライニング補修工法。[Scope of Claims] 1. When introducing the lining resin into the pipe from the opening at one end of the existing pipe using a carrier gas flow having a required flow rate and causing it to flow inside the pipe to form a coating film on the inner surface of the pipe, On the inlet side of the pipe, the lining resin is carried into the pipe by a carrier gas flow set at a low pressure of approximately 0.3 kg/ cm2 , with a slight pressure difference in the pipe internal pressure from atmospheric pressure, and A negative pressure suction force is applied to the outlet side, with the internal pressure of the pipe set to a low negative pressure of approximately -0.3Kg/ cm2 , which has a slight pressure difference with respect to atmospheric pressure, and this causes the suction force to be introduced to the inlet side. A method for repairing the inner lining of an existing pipe, which is characterized by repairing the inner surface of an existing pipe by flowing a lining resin into the pipe to form a resin lining coating on the inner surface of the pipe.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7432482A JPS58189076A (en) | 1982-04-30 | 1982-04-30 | Method for repairing inner surface of existing pipe line |
| GB08309976A GB2123917B (en) | 1982-04-30 | 1983-04-13 | Lining underground pipes |
| FR8306389A FR2526124B1 (en) | 1982-04-30 | 1983-04-19 | PROCESS FOR INTERNALLY LINING CONDUITS OF A SYSTEM |
| DE3315465A DE3315465C2 (en) | 1982-04-30 | 1983-04-28 | Process for lining pipes in a pipeline |
| US06/490,108 US4454173A (en) | 1982-04-30 | 1983-04-29 | Method for lining pipes in a pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7432482A JPS58189076A (en) | 1982-04-30 | 1982-04-30 | Method for repairing inner surface of existing pipe line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58189076A JPS58189076A (en) | 1983-11-04 |
| JPS6124069B2 true JPS6124069B2 (en) | 1986-06-09 |
Family
ID=13543813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7432482A Granted JPS58189076A (en) | 1982-04-30 | 1982-04-30 | Method for repairing inner surface of existing pipe line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58189076A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431622A (en) * | 1977-08-16 | 1979-03-08 | Osaka Gas Co Ltd | Treatment of inside surface of conduit installed |
-
1982
- 1982-04-30 JP JP7432482A patent/JPS58189076A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431622A (en) * | 1977-08-16 | 1979-03-08 | Osaka Gas Co Ltd | Treatment of inside surface of conduit installed |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58189076A (en) | 1983-11-04 |
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