JP3074005B2 - Inner lining method of vertical pipe - Google Patents
Inner lining method of vertical pipeInfo
- Publication number
- JP3074005B2 JP3074005B2 JP02254672A JP25467290A JP3074005B2 JP 3074005 B2 JP3074005 B2 JP 3074005B2 JP 02254672 A JP02254672 A JP 02254672A JP 25467290 A JP25467290 A JP 25467290A JP 3074005 B2 JP3074005 B2 JP 3074005B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- lining
- pig
- pipe
- vertical pipe
- 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 - Lifetime
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Description
本発明は、簡単な操作で高低差の大きな垂直管の内面
をライニングする方法に関する。The present invention relates to a method for lining the inner surface of a vertical tube having a large difference in elevation with a simple operation.
既設の管路にライニングを施すとき、管内に複数のピ
グを挿入し、それらピグの間に塗料を保持した状態で、
ピグを管軸方向に移動させる方法が知られている。 例えば、特公昭58−50779号に記載の工法では、第２
図に示すように、複数のピグ１〜３をワイヤ４で接続
し、ライニングさせる管体５の内部を通過させるように
している。ピグ１〜３としては、球体或いは半円柱体
で、管体５の内部断面より若干小さな断面を持つものが
使用される。また、連結されるピグの個数は、ライニン
グされる管体５の長さに応じて決められ、隣接するピグ
の間隔を0.5〜10mに維持するように、多いものにあって
は200個にものぼる多数のピグをワイヤで連結してい
る。 管体５の内面に施される塗料６は、これらピグ１〜３
及び管体５の内周面で区画される密閉空間に保持され
る。この状態でワイヤ４を牽引して、第２図の（ｂ）及
び（ｃ）に示すようにピグ１〜３を管体５の内部で管軸
方向に移動させるとき、塗料６は、後端側のピグ2,3に
よって管体５の内周面に押し付けられる。その結果、塗
料６は、管体５内周面に付着し、塗膜７を形成する。 このとき、塗膜７の厚みは、最後部のピグ３と管体５
の内周面との間のギャップによって決定される。また、
後端側のピグ2,3は、所定厚みの塗膜７を形成すると共
に、塗膜７の表面を平滑にする作用も呈する。 複数をピグ１〜３をワイヤ４で連結した工具は、途中
に垂直部がある管体５の内面ライニングに使用すること
も可能である。すなわち、第３図に示すように、塗料６
を保持したピグ１〜３を垂直部８の内部に管軸方向に移
動させる。これにより、垂直部８の内面に対しても、同
様な塗膜７が形成される。When lining existing pipelines, insert multiple pigs into the pipes, holding paint between those pigs,
A method of moving a pig in the pipe axis direction is known. For example, in the construction method described in Japanese Patent Publication No.
As shown in the figure, a plurality of pigs 1 to 3 are connected by wires 4 so as to pass through the inside of a tube 5 to be lined. Each of the pigs 1 to 3 is a sphere or a semi-cylindrical body having a cross section slightly smaller than the internal cross section of the tube 5. In addition, the number of pigs to be connected is determined according to the length of the piped body 5 to be lined, and as many as 200 pieces are provided so as to maintain the interval between adjacent pigs at 0.5 to 10 m. A number of pigs climbing are connected by wires. The paint 6 applied to the inner surface of the tube 5 is composed of these pigs 1 to 3.
And it is held in a closed space defined by the inner peripheral surface of the tube 5. In this state, when the wire 4 is pulled and the pigs 1 to 3 are moved in the pipe axis direction inside the pipe body 5 as shown in FIGS. It is pressed against the inner peripheral surface of the pipe body 5 by the pigs 2 and 3 on the side. As a result, the paint 6 adheres to the inner peripheral surface of the tube 5 and forms the coating film 7. At this time, the thickness of the coating film 7 is the
Is determined by the gap between the inner peripheral surface of the helical member. Also,
The rear end pigs 2 and 3 form the coating film 7 having a predetermined thickness and also have an action of smoothing the surface of the coating film 7. A tool in which a plurality of pigs 1 to 3 are connected by a wire 4 can be used for the inner surface lining of a tube body 5 having a vertical portion in the middle. That is, as shown in FIG.
Are moved inside the vertical portion 8 in the pipe axis direction. Thereby, a similar coating film 7 is formed on the inner surface of the vertical portion 8.
ところが、このライニング方法を高低差の大きな垂直
管に適用するとき、実施に当たり種々のトラブルが発生
し、垂直管内面に所望のライニングを施すことができな
い。 その理由の一つに、ピグ１〜３として、ほぼ同一を形
状及び大きさをもった球体，半円柱体を使用しているこ
とが挙げられる。そして、高低差の大きな垂直管にライ
ニングを施すとき、ピグ１〜３の間に保持される塗料４
は、垂直管の長さに応じて多量になる。そのため、最下
段のピグ１が受ける塗料４の重量が大きなものとなり、
塗料４の重量を支えることができず、ピグ１〜３が落下
し易くなる。 また、落下しないまでも、ピグ１〜３と垂直管の内周
面との間に塗料４が流下する隙間が存在する。その結
果、隙間を通じて塗料が落下し、無駄に消費される塗料
４の量が多くなり、良好なライニングを形成する上で有
効に使用される割合が減少する。 また、塗料の減少に伴いピグ１〜３の間が負圧になる
虞れがある。そのため、一定した厚みのライニング塗膜
が形成されなくなるといった問題点が派生する。そこ
で、本発明は、このような問題点を解消するために案出
されたものであり、垂直管の内周面に圧縮状態で押し付
けられる塗料保持ピグを先端側に設け、この塗料保持ピ
グと後端側のライニングピグとの間の空間部に塗料を保
持した状態で垂直管の内部を移動させることにより、高
低差の大きな垂直管に対しても、簡単な操作で良好なラ
イニングを施し、均一なライニング膜を形成することを
目的とする。However, when this lining method is applied to a vertical pipe having a large difference in elevation, various troubles occur during implementation, and a desired lining cannot be applied to the inner surface of the vertical pipe. One of the reasons is that, as the pigs 1 to 3, spherical bodies and semi-cylindrical bodies having substantially the same shape and size are used. When lining a vertical pipe having a large difference in height, paint 4 held between pigs 1 to 3
Is large depending on the length of the vertical tube. Therefore, the weight of the paint 4 received by the lowermost pig 1 becomes large,
The weight of the paint 4 cannot be supported, and the pigs 1 to 3 easily fall. Further, even if the paint 4 does not fall, there is a gap between the pigs 1 to 3 and the inner peripheral surface of the vertical pipe where the paint 4 flows down. As a result, the paint falls through the gap, the amount of the paint 4 wasted and consumed is increased, and the proportion of the paint 4 that is effectively used in forming a good lining is reduced. In addition, there is a possibility that the pressure between the pigs 1 to 3 becomes negative as the amount of paint decreases. Therefore, there arises a problem that a lining coating film having a constant thickness is not formed. Therefore, the present invention has been devised in order to solve such a problem, and a paint holding pig that is pressed in a compressed state against the inner peripheral surface of the vertical pipe is provided at the tip side, and this paint holding pig is provided. By moving the inside of the vertical tube while holding the paint in the space between the lining pig on the rear end side, even for a large vertical tube with a height difference, good lining is performed by simple operation, An object is to form a uniform lining film.
本発明のライニング方法は、この目的を達成するた
め、円柱あるいは円筒状の軸部31の上下両端に、弾性体
よりなり垂直管10の内面と気密に接する密閉板32,33を
備える塗料保持ピグ30と、周面に管軸方向に延びる複数
の条溝43を設けたガス抜き部42及び内部を空気が透過す
る多孔質材料からなる均し部41を連続して設けたライニ
ングピグ40との間の空間部63に塗料60を保持すると共
に、 両ピグ30,40を可撓性の索50で接続したライニング工
具20を、前記塗料保持ピグ30を先にして垂直管10の上部
開口から挿入し、索50を下方から牽引することによって
前記塗料保持ピグ30を前記垂直管10の内周面に圧縮状態
で押し付けながら前記ライニング工具20を前記垂直管10
内部で管軸方向に沿って下方に移動させ、 前記空間部63を大気に連通させつつ管内面にライニン
グ膜62を形成することを特徴とする。In order to achieve this object, the lining method of the present invention provides a paint holding pig provided with sealing plates 32, 33 at upper and lower ends of a cylindrical or cylindrical shaft portion 31 and made of an elastic body and in airtight contact with the inner surface of the vertical pipe 10. 30 and a lining pig 40 in which a gas vent portion 42 provided with a plurality of grooves 43 extending in the pipe axis direction on the peripheral surface and a leveling portion 41 continuously formed of a porous material through which air passes is provided. While holding the paint 60 in the space 63 therebetween, the lining tool 20 in which the two pigs 30, 40 are connected by the flexible cable 50 is inserted from the upper opening of the vertical pipe 10 with the paint holding pig 30 first. By pulling the rope 50 from below, the paint holding pig 30 is pressed against the inner peripheral surface of the vertical pipe 10 while compressing the lining tool 20 to the vertical pipe 10.
The lining film 62 is formed on the inner surface of the pipe while the space 63 is communicated with the atmosphere by moving the pipe downward inside the pipe.
先端側にある塗料保持ピグ30は、密閉板32,33が可圧
縮性の材料で作られており、垂直管10の内周面に押し当
てられた状態で密着する。この密閉板32,33の密着によ
り、塗料保持ピグ30と垂直管10の内周面との間に塗料60
が流下する隙間が生じることがない。したがって、塗料
保持ピグ30とライニングピグ40との間の空間部63に保持
されている塗料60は、垂直管10の内面ライニングに効率
よく消費される。 また、塗料保持ピグ30は、垂直管10の内周面に押し付
けられる力によって、塗料60の荷重に抗して所定の高さ
位置に確保される。そして、塗料保持ピグ30及びライニ
ングピグ40は、索50を牽引する力によって移動するた
め、移動速度の制御が簡単になる。 さらに、塗料60の減少に伴って、塗料保持ピグ30とラ
イニングピグ40との間の空間部63が負圧化するが、大気
から空気が均し部41及び条溝43を設けたガス抜き部42を
介して空間部63に導入されるため、ライニング雰囲気を
一定した圧力下に維持することができる。 その結果、垂直管10の内周面に施される塗膜62の厚み
は、容易の調節することができ、さらに一定にすること
が可能となる。The paint holding pig 30 at the distal end has the sealing plates 32 and 33 made of a compressible material, and comes into close contact with the inner peripheral surface of the vertical pipe 10 while being pressed against the inner circumferential surface. Due to the close contact of the sealing plates 32 and 33, the paint 60 is placed between the paint holding pig 30 and the inner peripheral surface of the vertical pipe 10.
There is no gap that flows down. Therefore, the paint 60 held in the space 63 between the paint holding pig 30 and the lining pig 40 is efficiently consumed by the inner lining of the vertical pipe 10. Further, the paint holding pig 30 is secured at a predetermined height position against the load of the paint 60 by a force pressed against the inner peripheral surface of the vertical pipe 10. And since the paint holding pig 30 and the lining pig 40 move by the force pulling the rope 50, the control of the moving speed is simplified. Further, with the decrease of the paint 60, the space 63 between the paint holding pig 30 and the lining pig 40 becomes negative pressure. Since the lining is introduced into the space 63 through the, the lining atmosphere can be maintained under a constant pressure. As a result, the thickness of the coating film 62 applied to the inner peripheral surface of the vertical tube 10 can be easily adjusted and can be made more constant.
以下、図面を参照しながら、実施例によって本発明を
具体的に説明する。 本実施例においては、第１図に示すように、ライニン
グされる垂直管10にライニング工具20を挿入し、矢印で
示すように垂直下方にライニング工具20を移動させる。 ライニング工具20は、先端側に塗料保持ピグ30が設け
られており、この塗料保持ピグ30から所定の距離（たと
えば、数ｍ〜数十ｍ）を隔ててライニングピグ40が設け
られており、これらピグ30,40は、可撓性の索50で接続
されている。また、先端側のピグ30には、索引用の索51
が取り付けられている。 塗料保持ピグ30は、円柱或いは円筒状の軸部31の両端
に密閉板32,33が取り付けられた構造となっている。密
閉板32,33は、硬質ゴム，可撓性プラスチックス等の弾
性体で作られており、垂直管10の内部断面より若干大き
な形状に形成されている。軸部31を垂直管10の管軸方向
に合わせて塗料保持ピグ30を垂直管10の内部に挿入する
とき、密閉板32,33は、小径の垂直管10によって圧縮さ
れると共に、垂直管10の内周面に押し付けられる。その
結果、垂直管10の内周面と密閉板32,33との間が、液密
に封止される。 ここで、軸部31に２個の密閉板32,33を取り付けてい
るため、ライニング工具20を垂直管10内部で管軸方向に
移動させても、移動途中で塗料保持ピグ30が傾いたり、
管内に閉塞することがない。なお、軸部31に取り付ける
密閉板の個数は、牽引用の索51を介した引張り力が働か
ない限り、塗料保持ピグ30が垂直管10内部の一定した高
さ位置に保たれるように、密閉板32,33を垂直管10の内
周面に押し付ける押圧力を得るように選定される。 ライニングピグ40は、均し部41及びガス抜き部42を備
えている。 均し部41は、垂直管10の内部断面より若干小さな断面
をもっており、垂直管10の内部に挿入されたとき、均し
部41の外周部と垂直管10の内周面との間に若干の隙間が
形成される。この隙間は、垂直管10の内周面に付着した
塗料60の厚みを均一にし、表面仕上げを行う作用をもっ
ている。なお、均し部41としては、内部を空気が透過す
る多孔質材料で作ることが好ましい。 ガス抜き部42は、周面に管軸方向に延びる複数の条溝
43を形成している。この条溝43を介して、ピグ30と40と
の間の空間部63が大気に連通する。或いは、第１図に点
線で示すように、均し部41及びガス抜き部42を貫通する
連通管44を設け、ピグ30と40との間の空間部63を大気に
連通させてもよい。この場合には、均し部41としては、
多孔質材料である必要はない。 ピグ30と40との間の空間部63には、塗料60が保持され
る。塗料60の量は、ライニングしようとする垂直管10の
口径，長さ及び塗膜の厚み等を考慮して予め定められ
る。例えば、高低差が数10mもある垂直管10にライニン
グを施すとき、保持される塗料60は、数十kgの重量にな
ることもある。 このような多量の塗料60によって、下方にある塗料保
持ピグ30に相当な荷重が加わる。しかし、密閉板32,33
が垂直管10の内周面に押し付けられることによって発生
する押圧力で、塗料保持ピグ30は、塗料60の荷重に抗し
て、垂直管10内で一定した高さ位置に維持される。 この状態で、索51を引っ張るとき、ライニング工具20
は、矢印で示した垂直下方に垂直管10内部を移動する。
このときの移動速度は、索51に加える引張り力を加減す
ることにより、容易に制御することができる。 ピグ30,40間に保持されている塗料60は、自重によっ
て加圧され、垂直管10の内周面に押し付けられる。そこ
で、ライニング工具20を移動させることにより、塗料60
が通過した後の垂直管10の内周面に塗膜61が形成され
る。 塗膜61は、塗料50の粘調性，ライニング工具20の，移
動速度，作業温度等によって変化するものであるが、お
およそ２〜5mmの厚みをもっている。この塗膜61は、垂
直管10の内周面に対する塗料60の付着力に依存して形成
されたものであるため、厚みのバラツキが大きく、また
凸凹のある表面状態となっている。 そこで、後続するライニングピグ40によって、塗膜61
を仕上げる。すなわち、垂直管10の内周面と均し部41と
の間の隙間を塗膜61が通過するとき、塗膜61は、その隙
間に対応した厚み及び平坦な表面状態に整形される。こ
のようにして、一定した厚みをもち、表面性状に優れた
塗膜62が得られる。得られた塗膜62は、塗料特性，ライ
ニング工具の形状，移動速度等によって変化するが、平
均して0.3〜2mmの厚みをもっている。 均し部41による均し作用を効果的に行うため、塗料60
のプールとライニングピグ40との間には、塗料60が存在
しない空間部63を設けることが好ましい。この空間部63
があることにより、塗料60は、管壁にほぼ均一に付着
し、後続するライニングピグ40によって均一な厚み及び
表面性状をもつ塗膜62となる。 塗膜61から除去された過剰の塗料は、自重で流下し、
下部にある塗料60のプールに返送される。そのため、塗
料60を効率よく塗膜62の形成に利用することができる。 また、ライニング工具２を管軸方向に移動させながら
垂直管10の内周面をライニングするとき、塗膜62の形成
量に応じてピグ30と40との間に保持されている塗料60が
減少する。塗料60の減少に伴って、ピグ30と40との間の
空間部63が負圧となる虞れがある。そこで、ガス抜き部
42の条溝43及び均し部41の連通孔を介して外部から空気
をピグ30と40との間の空間に導入するとき、ライニング
雰囲気を一定した圧力下に維持することができる。これ
により、塗料60の残存量如何に拘らず、ほぼ一定した厚
みをもった塗膜62を垂直管10の内周面に形成することが
できる。Hereinafter, the present invention will be described in detail with reference to the drawings. In this embodiment, as shown in FIG. 1, a lining tool 20 is inserted into a vertical pipe 10 to be lined, and the lining tool 20 is moved vertically downward as indicated by an arrow. The lining tool 20 is provided with a paint holding pig 30 on the tip side, and is provided with a lining pig 40 at a predetermined distance (for example, several meters to several tens of meters) from the paint holding pig 30. The pigs 30, 40 are connected by a flexible cable 50. The pig 30 on the tip side has an index cable 51.
Is attached. The paint holding pig 30 has a structure in which sealing plates 32 and 33 are attached to both ends of a cylindrical or cylindrical shaft portion 31. The sealing plates 32 and 33 are made of an elastic material such as hard rubber or flexible plastics, and have a shape slightly larger than the internal cross section of the vertical tube 10. When the paint holding pig 30 is inserted into the vertical pipe 10 by aligning the shaft portion 31 with the pipe axis direction of the vertical pipe 10, the sealing plates 32 and 33 are compressed by the small-diameter vertical pipe 10 and the vertical pipe 10 Is pressed against the inner peripheral surface. As a result, the space between the inner peripheral surface of the vertical tube 10 and the sealing plates 32 and 33 is sealed in a liquid-tight manner. Here, since the two sealing plates 32, 33 are attached to the shaft 31, even if the lining tool 20 is moved in the pipe axis direction inside the vertical pipe 10, the paint holding pig 30 is inclined during the movement,
No blockage in the tube. The number of sealing plates attached to the shaft portion 31 is such that the paint holding pig 30 is kept at a constant height inside the vertical pipe 10 as long as the pulling force does not act through the towing line 51, It is selected so as to obtain a pressing force for pressing the sealing plates 32 and 33 against the inner peripheral surface of the vertical pipe 10. The lining pig 40 includes a leveling part 41 and a gas vent part. The leveling portion 41 has a cross section slightly smaller than the internal cross section of the vertical tube 10, and when inserted into the vertical tube 10, slightly extends between the outer peripheral portion of the leveling portion 41 and the inner peripheral surface of the vertical tube 10. Is formed. This gap has the function of making the thickness of the paint 60 attached to the inner peripheral surface of the vertical pipe 10 uniform and performing surface finishing. The leveling section 41 is preferably made of a porous material through which air can pass. The gas vent 42 has a plurality of grooves extending in the pipe axis direction on the peripheral surface.
43 are formed. The space 63 between the pigs 30 and 40 communicates with the atmosphere via the groove 43. Alternatively, as shown by a dotted line in FIG. 1, a communication pipe 44 penetrating the leveling portion 41 and the gas vent portion 42 may be provided to communicate the space 63 between the pigs 30 and 40 to the atmosphere. In this case, as the leveling unit 41,
It need not be a porous material. The paint 60 is held in the space 63 between the pigs 30 and 40. The amount of the paint 60 is predetermined in consideration of the diameter and length of the vertical pipe 10 to be lined, the thickness of the coating film, and the like. For example, when lining a vertical tube 10 having a height difference of several tens of meters, the paint 60 retained may weigh several tens of kilograms. Due to such a large amount of paint 60, a considerable load is applied to the paint holding pig 30 located below. However, sealing plates 32, 33
The paint holding pig 30 is maintained at a constant height position in the vertical pipe 10 against the load of the paint 60 by the pressing force generated by pressing the paint on the inner peripheral surface of the vertical pipe 10. In this state, when pulling the rope 51, the lining tool 20
Moves inside the vertical tube 10 vertically downward as indicated by the arrow.
The moving speed at this time can be easily controlled by adjusting the tensile force applied to the rope 51. The paint 60 held between the pigs 30 and 40 is pressed by its own weight and pressed against the inner peripheral surface of the vertical pipe 10. Therefore, by moving the lining tool 20, the paint 60
After passing through, a coating film 61 is formed on the inner peripheral surface of the vertical tube 10. The coating film 61 has a thickness of about 2 to 5 mm, which varies depending on the viscosity of the coating material 50, the moving speed of the lining tool 20, the working temperature, and the like. Since the coating film 61 is formed depending on the adhesive force of the coating material 60 to the inner peripheral surface of the vertical tube 10, the coating has a large variation in thickness and has an uneven surface state. Therefore, the coating film 61 is formed by the following lining pig 40.
Finish. That is, when the coating film 61 passes through the gap between the inner peripheral surface of the vertical tube 10 and the leveling portion 41, the coating film 61 is shaped into a thickness and a flat surface state corresponding to the gap. In this way, a coating film 62 having a constant thickness and excellent surface properties can be obtained. The obtained coating film 62 has a thickness of 0.3 to 2 mm on average, though it varies depending on the coating properties, the shape of the lining tool, the moving speed, and the like. In order to effectively perform the leveling action by the leveling section 41, the paint 60
It is preferable to provide a space 63 where the paint 60 does not exist between the pool and the lining pig 40. This space 63
As a result, the paint 60 adheres substantially uniformly to the tube wall, and the subsequent lining pig 40 forms a coating film 62 having a uniform thickness and surface properties. Excess paint removed from the coating film 61 flows down by its own weight,
It is returned to the paint 60 pool at the bottom. Therefore, the paint 60 can be efficiently used for forming the coating film 62. Further, when lining the inner peripheral surface of the vertical pipe 10 while moving the lining tool 2 in the pipe axis direction, the paint 60 held between the pigs 30 and 40 decreases according to the amount of the coating 62 formed. I do. With the decrease in the paint 60, the space 63 between the pigs 30 and 40 may become negative pressure. So, degassing part
When air is externally introduced into the space between the pigs 30 and 40 through the groove 43 of 42 and the communication hole of the leveling portion 41, the lining atmosphere can be maintained under a constant pressure. Accordingly, the coating film 62 having a substantially constant thickness can be formed on the inner peripheral surface of the vertical tube 10 irrespective of the remaining amount of the coating material 60.
以上に説明したように、本発明においては、円柱ある
いは円筒状の軸部31の上下両端に、弾性体よりなる垂直
管10の内面と気密に接する密閉板32,33を備える塗料保
持ピグ30と、周面に管軸方向に延びる複数の条溝43を設
けたガス抜き部42及び内部を空気が透過する多孔質材料
からなる均し部41を連続して設けたライニングピグ40と
の間の空間部63に塗料60を保持し、両ピグ30,40を可撓
性の索50で接続したライニング工具20、塗料保持ピグ30
を先にして垂直管10の上部開口から挿入し、索50を下方
から牽引することによって塗料保持ピグ30を垂直管10の
内周面に圧縮状態で押し付けながらライニング工具20を
垂直管10内部で管軸方向に沿って下方に移動させ、空間
部63を大気に連通させつつ管内面にライニング膜62を形
成するので、一対の塗料保持ピグ30とライニングピグ40
と索50で連結し、両ピグ30,40の間の空間部63に塗料60
を保持した状態で垂直管10の内部を移動させることによ
って、高低差の大きな垂直管10に対しても極めて簡単に
ライニングを施すことが可能なる。また、先端側にある
塗料保持ピグ30は、垂直管10の内周面に押し付けられる
ため、両者の間が液密な接触状態となり、塗料60が下方
に洩れ落ちることがない。しかも、このときの押圧力に
よって、塗料保持ピグ30は、大きな塗料荷重が加わった
場合にあっても、索50を介して引張り力を加えない限
り、一定した高さ位置に保持される。さらに空間部63は
大気から空気が均し部41及び条溝43を設けたガス抜き部
42を介してに連通しているため、ライニング雰囲気を一
定した圧力下に維持することができる。 したがって、安定した条件下でライニングが行われる
と共に、均一な膜厚をもち表面状態が優れた塗膜62が垂
直管10の内周面に形成される。As described above, in the present invention, at the upper and lower ends of a cylindrical or cylindrical shaft portion 31, a paint holding pig 30 including sealing plates 32, 33 that are in air-tight contact with the inner surface of a vertical tube 10 made of an elastic body. Between a gas vent portion 42 provided with a plurality of grooves 43 extending in the tube axis direction on the peripheral surface and a lining pig 40 provided continuously with a leveling portion 41 made of a porous material through which air passes. A lining tool 20, a paint holding pig 30 in which a paint 60 is held in a space 63 and both pigs 30, 40 are connected by a flexible cable 50.
First, the lining tool 20 is inserted into the vertical pipe 10 while the paint holding pig 30 is pressed against the inner peripheral surface of the vertical pipe 10 by compressing the paint holding pig 30 against the inner peripheral surface of the vertical pipe 10 by pulling the rope 50 from below. Since the lining film 62 is formed on the inner surface of the pipe while moving the space section 63 to the atmosphere while moving the pipe downward along the pipe axis direction, a pair of the paint holding pig 30 and the lining pig 40 are formed.
To the space 63 between the pigs 30, 40 and paint 60
By moving the inside of the vertical tube 10 while holding the vertical line, it is possible to extremely easily line the vertical tube 10 having a large difference in height. Further, since the paint holding pig 30 at the tip end is pressed against the inner peripheral surface of the vertical pipe 10, the two are in a liquid-tight contact state, and the paint 60 does not leak downward. In addition, due to the pressing force at this time, even when a large paint load is applied, the paint holding pig 30 is held at a constant height position unless a tensile force is applied via the cable 50. Further, the space 63 is a degassing section provided with the air leveling section 41 and the groove 43 from the atmosphere.
The lining atmosphere can be maintained under a constant pressure because the lining atmosphere is communicated with the humidifier via 42. Therefore, lining is performed under stable conditions, and a coating film 62 having a uniform film thickness and excellent surface condition is formed on the inner peripheral surface of the vertical tube 10.
第１図は本発明実施例において垂直管の内周面をライニ
ングしている状態を示し、第２図は複数のピグを連結し
た従来のライニング工具で管体の内面ライニングを行っ
ている状態を示し、第３図はそのライニング工具で管体
の垂直部をライニングしている状態を示す。 10……垂直管,20……ライニング工具,30……塗料保持ピ
グ,31……軸部,32,33……密閉板,40……ライニングピ
グ,41……均し部,42……ガス抜き部,43……条溝,44……
連通管,50……可撓性の索,51……牽引用の索,60……塗
料,61……均し前の塗膜,62……均し後の塗膜、63……空
間部。FIG. 1 shows a state in which the inner peripheral surface of a vertical pipe is lined in the embodiment of the present invention, and FIG. 2 shows a state in which the inner surface of the pipe is lined with a conventional lining tool connecting a plurality of pigs. FIG. 3 shows a state where the vertical portion of the pipe is lined with the lining tool. 10 vertical pipe, 20 lining tool, 30 paint holding pig, 31 shaft part, 32, 33 sealing plate, 40 lining pig, 41 leveling part, 42 gas Cutout, 43 …… Slot, 44 ……
Communication pipe, 50 ... Flexible cable, 51 ... Towing cable, 60 ... Paint, 61 ... Coating before leveling, 62 ... Coating after leveling, 63 ... Space .
フロントページの続き (56)参考文献 特開 昭59−73691（ＪＰ，Ａ) 特開 昭61−120674（ＪＰ，Ａ) 特開 昭60−255180（ＪＰ，Ａ) 特開 平１−255420（ＪＰ，Ａ) 特公 昭58−50779（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B05D 7/22 B05C 7/00 - 7/08 Continuation of the front page (56) References JP-A-59-73691 (JP, A) JP-A-61-120674 (JP, A) JP-A-60-255180 (JP, A) JP-A-1-255420 (JP) , A) JP-B-58-50779 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) B05D 7/22 B05C 7/ 00-7/08
Claims (1)
端に、弾性体よりなる垂直管（10）の内面と気密に接す
る密閉板（32,33）を備える塗料保持ピグ（30）と、周
面に管軸方向に延びる複数の条溝（43）を設けたガス抜
き部（42）及び内部を空気が透過する多孔質材料からな
る均し部（41）を連続して設けたライニングピグ（40）
との間の空間部（63）に塗料（60）を保持すると共に、 両ピグ（30,40）を可撓性の索（50）で接続したライニ
ング工具（20）を、前記塗料保持ピグ（30）を先にして
垂直管（10）の上部開口から挿入し、索（50）を下方か
ら牽引することによって前記塗料保持ピグ（30）を前記
垂直管（10）の内周面に圧縮状態に押し付けながら前記
ライニング工具（20）を前記垂直管（10）内部で管軸方
向に沿って下方に移動させ、 前記空間部（63）を大気に連通させつつ管内面にライニ
ング膜（62）を形成することを特徴とする垂直管の内面
ライニング方法。1. A paint holding pig (30) provided with sealing plates (32, 33) at the upper and lower ends of a cylindrical or cylindrical shaft portion (31) in airtight contact with the inner surface of a vertical tube (10) made of an elastic body. And a gas vent portion (42) provided with a plurality of grooves (43) extending in the tube axis direction on the peripheral surface, and a leveling portion (41) made of a porous material through which air passes through are continuously provided. Lining Pig (40)
The paint (60) is held in the space (63) between the rim and the lining tool (20) in which both pigs (30, 40) are connected by a flexible cable (50). 30) is inserted first from the upper opening of the vertical pipe (10), and the paint retaining pig (30) is compressed on the inner peripheral surface of the vertical pipe (10) by pulling the rope (50) from below. The lining tool (20) is moved downward along the pipe axis direction inside the vertical pipe (10) while pressing the lining film (62) on the pipe inner surface while the space (63) is communicated with the atmosphere. An inner lining method for a vertical tube, characterized in that it is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02254672A JP3074005B2 (en) | 1990-09-25 | 1990-09-25 | Inner lining method of vertical pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02254672A JP3074005B2 (en) | 1990-09-25 | 1990-09-25 | Inner lining method of vertical pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04131159A JPH04131159A (en) | 1992-05-01 |
| JP3074005B2 true JP3074005B2 (en) | 2000-08-07 |
Family
ID=17268261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02254672A Expired - Lifetime JP3074005B2 (en) | 1990-09-25 | 1990-09-25 | Inner lining method of vertical pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3074005B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2683493A1 (en) * | 2011-03-07 | 2014-01-15 | Atomic Energy of Canada Limited | Processes and devices for applying coatings to the interior of tubes |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7993702B2 (en) * | 2006-10-06 | 2011-08-09 | Lexmark International, Inc. | Process and apparatus for forming a tubular article |
| CN107377341A (en) * | 2017-09-05 | 2017-11-24 | 刘春晓 | A kind of brushing technique of long and thin metal tubing inside coating |
-
1990
- 1990-09-25 JP JP02254672A patent/JP3074005B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2683493A1 (en) * | 2011-03-07 | 2014-01-15 | Atomic Energy of Canada Limited | Processes and devices for applying coatings to the interior of tubes |
| EP2683493A4 (en) * | 2011-03-07 | 2014-12-31 | Ca Atomic Energy Ltd | Processes and devices for applying coatings to the interior of tubes |
| US9757758B2 (en) | 2011-03-07 | 2017-09-12 | Atomic Energy Of Canada Limited | Processes and devices for applying coatings to the interior of tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04131159A (en) | 1992-05-01 |
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