JPH0374173B2 - - Google Patents
Info
- Publication number
- JPH0374173B2 JPH0374173B2 JP4777484A JP4777484A JPH0374173B2 JP H0374173 B2 JPH0374173 B2 JP H0374173B2 JP 4777484 A JP4777484 A JP 4777484A JP 4777484 A JP4777484 A JP 4777484A JP H0374173 B2 JPH0374173 B2 JP H0374173B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- pipe
- resin pipe
- clamping means
- hole
- 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
- 229920003002 synthetic resin Polymers 0.000 claims description 56
- 239000000057 synthetic resin Substances 0.000 claims description 56
- 238000004891 communication Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Description
【発明の詳細な説明】
本発明は、煙、ガスなどを輸送するための合成
樹脂管を修繕するための工法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing synthetic resin pipes for transporting smoke, gas, etc.
先行技術では、ポリエチレンなどから成る合成
樹脂管の修繕すべき箇所の両側にサドルなどを気
密に固着し、このサドルを介して修繕すべき合成
樹脂管に連通する分岐管を接続し、この分岐管に
バイパス管を接続している。分岐管は、合成樹脂
管から成る。合成樹脂管の修繕すべき箇所を切除
して新たな管によつて接続した後には、分岐管を
挾圧してバイパス管を除去し、その分岐管の端部
を閉塞する。その後、分岐管の挾圧事態を解き、
こうして修繕を完了する。このような先行技術で
は、修繕完了後に比較的長い、たとえば40cm程度
の分岐管が合成樹脂管から半径方向外方に突出し
たままとなる。したがつて、分岐管が外力によつ
て損傷することを防ぐための配慮をしなければな
らない。 In the prior art, a saddle or the like is airtightly fixed to both sides of a synthetic resin pipe made of polyethylene or the like to be repaired, and a branch pipe that communicates with the synthetic resin pipe to be repaired is connected through the saddle. A bypass pipe is connected to the The branch pipe is made of a synthetic resin pipe. After cutting out the part of the synthetic resin pipe to be repaired and connecting it with a new pipe, the branch pipe is clamped to remove the bypass pipe and the end of the branch pipe is closed. After that, the pinching situation of the branch pipe is released,
This completes the repair. In such prior art, after the repair is completed, a relatively long branch pipe, for example, about 40 cm, remains protruding radially outward from the synthetic resin pipe. Therefore, care must be taken to prevent the branch pipe from being damaged by external forces.
本発明の目的は、合成樹脂管の修繕完了後に、
合成樹脂管の半径方向外方に長い管が残置するこ
とのないようにした改良された修繕工法を提供す
ることである。 The purpose of the present invention is to
To provide an improved repair method that prevents a long pipe from remaining radially outward of a synthetic resin pipe.
第１図は、本発明の一実施例の修繕すべき箇所
１を有しているポリエチレンなどの合成樹脂管２
を示す側面図である。このような合成樹脂管２
は、たとえば地中に埋設されており、ガスなどの
流体を輸送するために用いられている。 FIG. 1 shows a synthetic resin pipe 2 such as polyethylene having a portion 1 to be repaired according to an embodiment of the present invention.
FIG. Such synthetic resin pipe 2
are, for example, buried underground and used to transport fluids such as gas.
この修繕すべき箇所１の両側に、合成樹脂管２
を外囲して挾持するクランプ手段３，４を取付け
る。クランプ手段３は、合成樹脂管２の約半周を
外囲する半割部５と、合成樹脂管２の残余の半周
部分を外囲する半割部６とを含み、これらの半割
部分５，６がねじなどによつて相互の近接方向に
締め付けられることができる。後述のように剛性
の筒体７（第６図参照）を合成樹脂管２内に挿入
することができるようにするために、クランプ手
段３は、合成樹脂管２を変形することがない程度
に比較的ゆるやかに挾持している。クランプ手段
３の半割部分６には、作業孔８を有する短筒部９
が一体的に形成されている。 Synthetic resin pipes 2 are installed on both sides of this area 1 to be repaired.
Clamp means 3 and 4 are attached to surround and clamp the. The clamping means 3 includes a half part 5 surrounding approximately half the circumference of the synthetic resin pipe 2, and a half part 6 surrounding the remaining half circumference of the synthetic resin pipe 2, and these half parts 5, 6 can be tightened in a mutually proximal direction with screws or the like. In order to be able to insert the rigid cylindrical body 7 (see FIG. 6) into the synthetic resin pipe 2 as described later, the clamping means 3 is tightened to the extent that the synthetic resin pipe 2 is not deformed. It is held relatively loosely. The half portion 6 of the clamping means 3 has a short cylindrical portion 9 having a working hole 8.
are integrally formed.
第２図を参照して、短筒部９の作業孔８に穿孔
機１０の切削刃１１を挿入し、合成樹脂管２に孔
１２を穿孔する。穿孔機１０は、切削刃１１を有
する大略的にＴ字状に形成されており、把手１３
を回転することによつて切削刃１１によつて合成
樹脂管２を穿孔することができる。 Referring to FIG. 2, the cutting blade 11 of the punching machine 10 is inserted into the working hole 8 of the short cylindrical portion 9, and a hole 12 is punched in the synthetic resin pipe 2. The drilling machine 10 has a roughly T-shape with a cutting blade 11 and a handle 13.
By rotating the cutting blade 11, the synthetic resin pipe 2 can be pierced.
この穿孔後に、穿孔機１０を短筒部９から取出
し、第３図に示される弁手段１０ａを取付ける。
この弁主段１０ａのハウジング１１は、作業孔８
と螺合する接続筒１２を有する。ハウジング１１
内には内ねじ１３が刻設されており、この内ねじ
１３には弁体１４が螺合して上下に変位すること
ができる。ハウジング１１の側部には、接続管１
５が形成される。弁体１４を第３図示のように接
続管１２側に変位して弁孔１６を塞いだ状態で、
作業孔８が閉じられる。 After this drilling, the drilling machine 10 is taken out from the short cylindrical portion 9, and the valve means 10a shown in FIG. 3 is attached.
The housing 11 of this valve main stage 10a has a working hole 8
It has a connecting tube 12 that is screwed together. Housing 11
An internal thread 13 is cut inside, and a valve body 14 is screwed into this internal thread 13 so that it can be displaced up and down. A connecting pipe 1 is provided on the side of the housing 11.
5 is formed. With the valve body 14 displaced toward the connecting pipe 12 side as shown in the third diagram to close the valve hole 16,
The working hole 8 is closed.
第４図に示されるように、もう１つのクランプ
手段４に関しても同様に弁手段１７が連結され
る。接続管１５には、バイパス管１８の端部が連
結される。バイパス管１８の他端部は、弁手段１
７に接続される。 As shown in FIG. 4, a valve means 17 is likewise connected to the other clamp means 4. An end of a bypass pipe 18 is connected to the connecting pipe 15 . The other end of the bypass pipe 18 is connected to the valve means 1
Connected to 7.
そこで、弁手段１０の弁体１４を回転して第３
図の仮想線１９で示される位置に変位する。これ
によつて弁手段１０ａは、開弁状態となり、作業
孔８は接続管１５およびバイパス管１８に連通す
る。もう１つの弁手段１７に関しても同様であ
る。このようにして、修繕箇所１の両側で、合成
樹脂管２内の流体を分岐してバイパス管１８流す
ことができ、流体の輸送を中断することが防がれ
る。バイパス管１８の一部分は、可撓性であつて
もよい。 Therefore, by rotating the valve body 14 of the valve means 10, the third
It is displaced to the position indicated by the imaginary line 19 in the figure. As a result, the valve means 10a becomes open, and the working hole 8 communicates with the connecting pipe 15 and the bypass pipe 18. The same applies to the other valve means 17. In this way, the fluid in the synthetic resin pipe 2 can be branched off to flow through the bypass pipe 18 on both sides of the repair location 1, and interruption of fluid transport can be prevented. A portion of bypass tube 18 may be flexible.
クランプ手段３，４間において、合成樹脂管２
をクランプ手段３，４の近傍で挟圧手段２１，２
２によつて挟圧して潰し、閉塞する。この挟圧手
段２１は一対のローラを相互の近接方向に変位し
て合成樹脂２を挟圧する構成を有してもよい。挟
圧手段２１，２２によつて合成樹脂管２を閉塞し
て状態で、修繕箇所１を含む合成樹脂管２の部分
２３を切除する。 Between the clamping means 3 and 4, the synthetic resin pipe 2
The clamping means 21 and 2 are placed near the clamping means 3 and 4.
2 to crush and close it. This pinching means 21 may have a configuration in which a pair of rollers are displaced in a direction toward each other to pinch the synthetic resin 2. While the synthetic resin pipe 2 is closed by the clamping means 21 and 22, a portion 23 of the synthetic resin pipe 2 including the repair area 1 is cut out.
そこで、合成樹脂管２の端部２ａから第５図に
示される押し込み手段２４を用いて第６図に示さ
れる剛性の筒体７を挿入する。押し込み手段２４
は、合成樹脂管２の端部２ａに嵌まり込む有底の
装着筒２５と、この装着筒２５を気密に挿通する
押し込み棒２６とを含む。押し込み棒２６には、
把手２７が固着されている。押し込み棒２６を管
２の端部外方に引き出した状態で、装着筒２５に
よつて端部２ａを外囲して気密に装着筒２５を端
部２ａに装着する。そこで、挟圧手段２１をゆる
め、筒体７を押し込み棒２６によつてクランプ手
段３にもたらす。押し込み棒２６には、筒体７を
合成樹脂管２内で容易に押し込むことができるよ
うにするために、押し込み棒２６の半径方向外方
に広がつた押し込み片２９を有する。 Therefore, the rigid cylindrical body 7 shown in FIG. 6 is inserted from the end 2a of the synthetic resin pipe 2 using the pushing means 24 shown in FIG. Pushing means 24
includes a bottomed mounting tube 25 that fits into the end 2a of the synthetic resin pipe 2, and a push rod 26 that passes through the mounting tube 25 in an airtight manner. The push rod 26 has
A handle 27 is fixed. With the push rod 26 pulled out to the outside of the end of the tube 2, the end 2a is surrounded by the mounting tube 25 and the mounting tube 25 is airtightly attached to the end 2a. Then, the clamping means 21 is loosened and the cylinder 7 is brought to the clamping means 3 by the push rod 26. The push rod 26 has a push piece 29 that extends outward in the radial direction of the push rod 26 so that the cylinder 7 can be easily pushed into the synthetic resin pipe 2.
筒体７は、合成樹脂管２内にほぼぴつたりと嵌
まり込む外径を有し、その半径方向外方に開口し
た連通孔３０を有する。第６図１で示される実施
例では、筒体７は短筒３１，３２が管軸方向に連
結棒３３によつて連結された構成を有し、これら
短筒３１，３２間に連通孔３０が形成された構成
を有する。 The cylindrical body 7 has an outer diameter that fits almost snugly into the synthetic resin pipe 2, and has a communication hole 30 that opens outward in the radial direction. In the embodiment shown in FIG. 6, the cylinder body 7 has a structure in which short cylinders 31 and 32 are connected in the tube axis direction by a connecting rod 33, and a communication hole 30 is formed between these short cylinders 31 and 32. It has a configuration in which
他の実施例の筒体７ａは第６図２に示されよう
に、直円筒状に構成され、連絡孔３０ａが構成さ
れている。本発明に従う他の筒体７ｂは、第６図
３に示されるように周方向に周壁に複数の連絡孔
３０ｂが形成されている。筒体７をクランプ手段
３の位置に押し込み手段２４によつてもたらした
とき、連絡孔３０，３０ａ，３０ｂは、作業孔１
２および合成樹脂管２に形成された孔１１に連通
している。 As shown in FIG. 6 and 2, the cylindrical body 7a of the other embodiment has a right cylindrical shape and is provided with a communication hole 30a. Another cylindrical body 7b according to the present invention has a plurality of communicating holes 30b formed in the peripheral wall in the circumferential direction, as shown in FIG. 6 and 3. When the cylindrical body 7 is brought to the position of the clamping means 3 by the pushing means 24, the communication holes 30, 30a, 30b are connected to the working hole 1.
2 and a hole 11 formed in the synthetic resin pipe 2 .
クランプ手段３に筒体７を挿入した状態で、押
し込み手段２４の押し込み棒２６を第７図のよう
に、管端部２ａ側に引き寄せる。そこで挟圧手段
２１によつて合成樹脂管２を挟圧して再び閉塞す
る。その後、押し込み手段２４の装着筒２５を管
端部２ａから取外す。この状態で、クランプ手段
３によつて管２を強固に締め付ける。筒体７の働
きによつて、クランプ手段３による強締時に合成
樹脂管２が変形したり、潰れることがない。この
ような工程は、もう１つのクランプ手段４に関し
ても同様である。こうして第８図のように合成樹
脂管２の端部２ａ，２ｂ間にわたつて管体２９を
連結する。 With the cylinder 7 inserted into the clamp means 3, the push rod 26 of the push means 24 is pulled toward the tube end 2a as shown in FIG. Thereupon, the synthetic resin pipe 2 is compressed by the clamping means 21 and closed again. Thereafter, the mounting tube 25 of the pushing means 24 is removed from the tube end 2a. In this state, the tube 2 is firmly clamped by the clamping means 3. Due to the action of the cylindrical body 7, the synthetic resin pipe 2 will not be deformed or crushed when the clamping means 3 tightens the synthetic resin pipe 2. Such a process is similar for the other clamping means 4 as well. In this way, the tube body 29 is connected between the ends 2a and 2b of the synthetic resin tube 2, as shown in FIG.
第９図は、合成樹脂管２の端部２ａと管体２９
との接続構造を示す断面図である。管体２９は、
鋼鉄などから成り、大径部３０に端部２ａが挿入
され、ゴムなどから成るシール部材３１が、大径
部３０に螺合する押輪３２によつて管軸内方（第
９図の右方）に締め付ける。これによつて、シー
ル部材３１は大径部３０の内周面と端部２ａの外
周面との間の気密性が達成される。こうして、管
体２９が端部２ａ，２ｂに気密に連結される。 FIG. 9 shows the end 2a of the synthetic resin pipe 2 and the pipe body 29.
FIG. The tube body 29 is
The end portion 2a made of steel or the like is inserted into the large diameter portion 30, and the sealing member 31 made of rubber or the like is pushed inside the tube shaft (to the right in FIG. ). Thereby, the seal member 31 achieves airtightness between the inner circumferential surface of the large diameter portion 30 and the outer circumferential surface of the end portion 2a. In this way, the tube body 29 is hermetically connected to the ends 2a and 2b.
そこで、挟圧手段２１，２２を取り外して合成
樹脂管２の閉塞を解除する。こうして合成樹脂管
２は、管体２９を介して流体の輸送が可能にな
る。 Therefore, the pinching means 21 and 22 are removed to release the blockage of the synthetic resin pipe 2. In this way, the synthetic resin pipe 2 becomes capable of transporting fluid via the pipe body 29.
そこで、弁手段１０の弁体１４によつて第３図
に示されるように弁孔１６を閉じて閉弁状態とす
る。もう１つの弁手段１７に関しても同様であ
る。続いて、バイパイ管１８を弁手段１０ａ，１
７から取り外す。そこで、第１０図に示されるよ
うに袋体３３を用いてクランプ手段３の接続筒９
を囲み、弁手段１０の接続口１２を接続筒９から
取り外し、これにかわつて接続筒９の内ねじ８に
栓３４を気密螺合する。このことは、もう１つの
弁手段１７およびクランプ手段４に関しても同様
である。こうして修繕箇所１の修繕を完了する。 Therefore, the valve hole 16 is closed by the valve element 14 of the valve means 10, as shown in FIG. 3, to bring the valve into a closed state. The same applies to the other valve means 17. Subsequently, the bypass pipe 18 is connected to the valve means 10a, 1.
Remove from 7. Therefore, as shown in FIG. 10, the connecting tube 9 of the clamping means 3 is
The connecting port 12 of the valve means 10 is removed from the connecting tube 9, and the plug 34 is hermetically screwed into the internal thread 8 of the connecting tube 9 in its place. This also applies to the other valve means 17 and clamp means 4. In this way, the repair of repair area 1 is completed.
クランプ手段１０においてい、半割部分６の内
周面と合成樹脂管２の外周面との間における接続
孔１１付近の流体の漏洩を防ぐために、接続孔１
１を外囲するＯリング３５が設けられてもよい。 In the clamping means 10, in order to prevent fluid leakage near the connection hole 11 between the inner peripheral surface of the half portion 6 and the outer peripheral surface of the synthetic resin pipe 2, the connection hole 1 is
An O-ring 35 surrounding 1 may be provided.
上述の実施例によれば、合成樹脂管２を相互に
接続するための特殊な器具などを必要とせず、修
繕箇所１は管体２９を用いて気密に修繕が行なわ
れるので、修繕を容易に行なうことができるとと
もに、合成樹脂管の融着のために各種の作業具を
必要とせず、したがつて各種の修繕箇所１を容易
に修繕することができる。また、このような修繕
作業は、簡便であるので、その作業時間が短くて
済む。 According to the above-described embodiment, there is no need for special equipment to connect the synthetic resin pipes 2 to each other, and the repair area 1 can be repaired airtight using the pipe body 29, making the repair easy. In addition, various work tools are not required for fusing the synthetic resin pipes, and therefore, various repair points 1 can be easily repaired. Further, since such repair work is simple, the work time can be shortened.
筒体７を合成樹脂管２内に挿入した後に、クラ
ンプ手段３によつて合成樹脂管２を強固に締め付
けることによつて、管に形成された孔から合成樹
脂管２の外周面と半割部分４の内周面との間の気
密性を向上することができる。このような作業
は、管体２９によつて合成樹脂管２の端部２ａ，
２ｂを連結した後に行なつてもよい。 After inserting the cylindrical body 7 into the synthetic resin pipe 2, by firmly tightening the synthetic resin pipe 2 with the clamping means 3, the outer circumferential surface of the synthetic resin pipe 2 and the half-split are inserted through the hole formed in the pipe. The airtightness between the inner peripheral surface of the portion 4 and the inner circumferential surface of the portion 4 can be improved. Such work is carried out by using the pipe body 29 to connect the ends 2a and 2 of the synthetic resin pipe 2.
It may be performed after connecting 2b.
以上のように本発明によれば、合成樹脂管を処
理するクランプ手段の作業孔を栓で防ぐようにし
たので、その栓が合成樹脂管の半径方向外方に長
く突出することがなくなる。 As described above, according to the present invention, the working hole of the clamping means for processing the synthetic resin pipe is blocked by the plug, so that the plug does not protrude outward in the radial direction of the synthetic resin pipe for a long time.
第１図は修繕すべき箇所１を有する合成樹脂管
２にクランプ手段３，４を装着した状態を示す側
面図、第２図はクランプ手段３の断面図、第３図
は弁手段１０ａの断面図、第４図はバイパイ管１
８を装着した状態を示す側面図、第５図は押し込
み手段２４によつて筒体７をクランプ手段３の位
置に合成樹脂管２内を押し込んで行く工程を説明
するための断面図、第６図は筒体７，７ａ，７ｂ
の斜視図、第７図は押し込み手段２４を合成樹脂
管２の端部に装着した状態を示す断面図、第８図
は合成樹脂管２の端部２ａ，２ｂを管体２９で接
続した状態を示す側面図、第９図は第８図の切断
面線−から見た断面図である。断面図、第１
０図はクランプ手段３を用いて合成樹脂管２を修
繕する作業手順を説明するための図である。
１……修繕箇所、２……合成樹脂管、３，４…
…クランプ手段、７，７ａ，７ｂ……筒体、８…
…作業孔、９……接続筒、１０……穿孔機、１１
……穿孔刃、１２……連絡孔、１７……弁手段、
１８……バイパイ管、２１，２２……挟圧手段、
２４……押し込み手段、２９……管体。
Fig. 1 is a side view showing the state in which clamping means 3 and 4 are attached to a synthetic resin pipe 2 having a portion 1 to be repaired, Fig. 2 is a cross-sectional view of the clamping means 3, and Fig. 3 is a cross-sectional view of the valve means 10a. Figure 4 shows the bypass tube 1.
FIG. 5 is a side view showing the state in which the tube 8 is attached, and FIG. The figure shows cylindrical bodies 7, 7a, 7b
7 is a cross-sectional view showing a state in which the pushing means 24 is attached to the end of the synthetic resin pipe 2, and FIG. 8 is a state in which the ends 2a and 2b of the synthetic resin pipe 2 are connected by a pipe body 29. FIG. 9 is a sectional view taken along the cutting plane line - in FIG. 8. Cross section, 1st
FIG. 0 is a diagram for explaining the work procedure for repairing the synthetic resin pipe 2 using the clamping means 3. 1... Repair area, 2... Synthetic resin pipe, 3, 4...
... Clamping means, 7, 7a, 7b... Cylindrical body, 8...
...Working hole, 9...Connection pipe, 10...Drilling machine, 11
...Punching blade, 12...Communication hole, 17...Valve means,
18... By-pie pipe, 21, 22... Squeezing means,
24... Pushing means, 29... Tube body.
Claims (1)
脂管を外囲して挟持するクランプ手段を取付け、
このクランプ手段には合成樹脂管に向つて延びる
作業孔が形成されており、 作業孔に沿つて合成樹脂管に連結孔を穿孔し、 穿孔した連結孔をバイパス管によつて連結し、 合成樹脂管の修繕すべき箇所を切除し、 クランプ手段によつて外囲されている合成樹脂
管の部分内に剛性の筒体を挿入し、この筒体に
は、作業孔に連通する連通孔が形成されており、 切除した合成樹脂管の部分を管体によつて連結
し、クランプ手段によつて合成樹脂管を、筒体外
方から締め付けた状態で、バイパス管を除去し
て、作業孔を栓によつて塞ぐことを特徴とする合
成樹脂管の修繕工法。[Scope of Claims] 1. Clamping means for surrounding and clamping the synthetic resin pipe are attached on both sides of the part of the synthetic resin pipe to be repaired,
This clamping means has a working hole extending toward the synthetic resin pipe, a connecting hole is drilled in the synthetic resin pipe along the working hole, the bored connecting hole is connected with a bypass pipe, and the synthetic resin pipe is connected to the connecting hole. The part of the pipe to be repaired is cut out, a rigid cylinder is inserted into the part of the synthetic resin pipe surrounded by the clamping means, and a communication hole communicating with the working hole is formed in this cylinder. The parts of the synthetic resin pipe that were cut out are connected by the pipe body, and the synthetic resin pipe is tightened from the outside of the cylinder body using a clamping means.The bypass pipe is then removed and the working hole is plugged. A method for repairing synthetic resin pipes characterized by sealing them with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4777484A JPS6116842A (en) | 1984-03-12 | 1984-03-12 | Repair technique of synthetic resin pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4777484A JPS6116842A (en) | 1984-03-12 | 1984-03-12 | Repair technique of synthetic resin pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6116842A JPS6116842A (en) | 1986-01-24 |
| JPH0374173B2 true JPH0374173B2 (en) | 1991-11-26 |
Family
ID=12784724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4777484A Granted JPS6116842A (en) | 1984-03-12 | 1984-03-12 | Repair technique of synthetic resin pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6116842A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4980116A (en) * | 1989-02-10 | 1990-12-25 | Insituform Of North America, Inc. | Lining of pipelines and passageways |
| CN108725499B (en) * | 2018-06-08 | 2019-06-07 | 荆门创佳机械科技有限公司 | A kind of rail clamp device of high-speed rail means of transportation |
-
1984
- 1984-03-12 JP JP4777484A patent/JPS6116842A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6116842A (en) | 1986-01-24 |
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