JPH0425578Y2 - - Google Patents
Info
- Publication number
- JPH0425578Y2 JPH0425578Y2 JP1986127291U JP12729186U JPH0425578Y2 JP H0425578 Y2 JPH0425578 Y2 JP H0425578Y2 JP 1986127291 U JP1986127291 U JP 1986127291U JP 12729186 U JP12729186 U JP 12729186U JP H0425578 Y2 JPH0425578 Y2 JP H0425578Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- head
- new pipe
- crushing
- new
- 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
- 238000007596 consolidation process Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、地中の水道管などの既設管を開削に
よらないで新管に布設替えするための既設管の布
設替え装置に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an existing pipe replacement device for replacing existing pipes, such as underground water pipes, with new pipes without excavation.
従来の技術
従来のこの種の装置においては、例えば特公昭
60−27873号公報に示されているように、既設管
の外径よりも大きい外径を有する胴部と、既設管
の内壁と係合してその壁体を破砕する前方部分と
を有する破砕ヘツドが使用され、破砕ヘツドの後
端に締結装置を介して新管を取り付け、破砕ヘツ
ドの前方部分を先にして破砕ヘツドを既設管内に
入り込むように新管とともに移動させて既設管を
破砕し、破砕した既設管内に新管を入り込ませる
ための空間を前記胴部により維持し、この空間内
に新管を入れるようにしたものが提案されてい
る。Conventional technology In conventional devices of this type, for example,
As shown in Publication No. 60-27873, a crusher having a body having an outer diameter larger than the outer diameter of the existing pipe and a front portion that engages with the inner wall of the existing pipe to crush the wall. A new pipe is attached to the rear end of the crushing head via a fastening device, and the crushing head is moved into the existing pipe together with the new pipe, with the front part of the crushing head first, to crush the existing pipe. It has been proposed that a space for inserting a new pipe into the crushed existing pipe is maintained by the body part, and the new pipe is inserted into this space.
考案が解決しようとする問題点
しかし、新管のサイズは必ずしも一定であると
は限らず、新管のサイズを変える必要が生じる場
合がある。このような場合、上記従来の装置によ
れば、破砕ヘツドと新管とが締結装置により直接
的に接続されているので、新管に合わせて破砕ヘ
ツドも変えなければならない。破砕ヘツドは本来
既設管のサイズに合わせて選択すべきものである
ため、前記のようなことは合理的でなく、不経済
であるという問題があつた。Problems that the invention aims to solve However, the size of the new pipe is not necessarily constant, and there may be cases where it is necessary to change the size of the new pipe. In such a case, according to the conventional apparatus described above, the crushing head and the new pipe are directly connected by the fastening device, so the crushing head must also be changed to match the new pipe. Since the crushing head should originally be selected according to the size of the existing pipe, there was a problem that the above-mentioned method was unreasonable and uneconomical.
本考案は、このような問題点を解決し、新管の
サイズが変わつても破砕ヘツドを変更しなくてす
むようにすることを目的とする。 The purpose of the present invention is to solve these problems and to make it unnecessary to change the crushing head even if the size of the new pipe changes.
問題点を解決するための手段
上記問題点を解決するため、本考案は、新管の
後端面に推力を負荷することにより地中の既設管
を前記新管前方に取り付けた破砕ヘツドで破砕し
ながらこの破砕ヘツドに続く前記新管に布設替え
するための装置であつて、前記破砕ヘツドと新管
との間に圧密ヘツドが介装され、この圧密ヘツド
は円錐部を有し、この円錐部小径側端部が前記破
砕ヘツドに着脱自在に接続され、前記円錐部大径
側端部が前記新管の外径と等しい外径に形成され
て前記円錐部大径側に前記新管を接続可能に構成
したことを特徴とするものである。Means for Solving the Problems In order to solve the above problems, the present invention crushes the existing underground pipe with a crushing head attached to the front of the new pipe by applying thrust to the rear end face of the new pipe. However, this is a device for re-laying the new pipe following the crushing head, and a consolidation head is interposed between the crushing head and the new pipe, the consolidation head has a conical part, and the conical part The small diameter side end is detachably connected to the crushing head, and the large diameter side end of the conical part is formed to have an outer diameter equal to the outer diameter of the new pipe, and the new pipe is connected to the large diameter side of the conical part. This feature is characterized in that it is configured to be possible.
作 用
上記構成においては、破砕ヘツドと新管とが圧
密ヘツドを介して着脱自在に接続される。したが
つて、新管のサイズを変える必要が生じた場合で
も、破砕ヘツドは既設管のサイズが変わらない限
り変える必要なく、圧密ヘツドのみを新管のサイ
ズに合わせて変えればよいのである。それゆえ、
高価な破砕ヘツドの種類が少なくてすみ、経済的
である。また、この圧密ヘツドは円錐部を有して
いるので、新管の口径が既設管の口径よりも大き
い場合にも、破砕した既設管の破片が外方に押し
退けられて容易に新管が布設替えされる。Operation In the above configuration, the crushing head and the new pipe are detachably connected via the consolidation head. Therefore, even if it becomes necessary to change the size of the new pipe, there is no need to change the crushing head as long as the size of the existing pipe does not change, and only the consolidation head needs to be changed to match the size of the new pipe. therefore,
It is economical because it requires fewer types of expensive crushing heads. In addition, since this consolidation head has a conical part, even if the diameter of the new pipe is larger than the diameter of the existing pipe, the fragments of the crushed existing pipe are pushed outward, making it easy to install the new pipe. will be replaced.
実施例
以下、本考案の一実施例を第１図〜第３図にも
とづいて説明する。Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 3.
本実施例の布設替え装置１は、第１図および第
２図に示すように、破砕ヘツド２と新管３との間
に圧密ヘツド４が介装されてなる。破砕ヘツド２
は、円筒状胴部５の外周面に複数個の板状破砕刃
６が放射状にかつ等間隔に固着されてなる。胴部
５は、その外径Ａが後述する既設管１７の管部の
内径Ｂよりも小さく、前端部に円錐状案内部７
と、後端部内側に第１接続板８とがそれぞれ固着
されている。破砕刃６は、その先端側が既設管１
７の内径Ｂよりも小径となるよう傾斜した構成と
され、一種のくさびを形成している。９はその刃
先である。 As shown in FIGS. 1 and 2, the cable replacement apparatus 1 of this embodiment includes a consolidation head 4 interposed between a crushing head 2 and a new pipe 3. Crushing head 2
, a plurality of plate-shaped crushing blades 6 are fixed radially and at equal intervals to the outer peripheral surface of a cylindrical body 5. The body portion 5 has an outer diameter A smaller than an inner diameter B of the existing pipe 17, which will be described later, and has a conical guide portion 7 at the front end.
and a first connecting plate 8 are fixed to the inside of the rear end. The tip of the crushing blade 6 is connected to the existing pipe 1.
It is configured to be inclined so that the diameter is smaller than the inner diameter B of No. 7, and forms a kind of wedge. 9 is the cutting edge.
新管３は、その外径Ｃが本実施例では既設管１
７の管部の外径Ｄよりも大きいが、必ずしもこれ
に限定されるものはなく、外径Ｄに等しくても、
また外径Ｄより小さくても差し支えない。 The new pipe 3 has an outer diameter C of the existing pipe 1 in this embodiment.
Although it is larger than the outer diameter D of the tube part of No. 7, it is not necessarily limited to this, and even if it is equal to the outer diameter D,
Moreover, it may be smaller than the outer diameter D.
圧密ヘツド４は、円錐部１０の後端部に円筒部
１１が接続されてなる。円錐部１０は、小径側端
部内側に第２接続板１２が形成されるとともに、
大径側端部周壁に複数個のジエツト水噴射孔１３
が小径側に向つて等間隔に穿設されている。１６
は圧力水管で、ジエツト水噴射孔１３に連通され
ている。第２接続板１２は、たとえばボルト１４
およびナツト１５により第１接続板８と着脱自在
に接続されている。各ジエツチ水噴射孔１３には
圧力水管１６が接続されている。円筒部１１は、
その外径が新管３の外径Ｃに等しく、後端部に新
管３が接続されている。 The consolidation head 4 includes a cylindrical portion 11 connected to the rear end of a conical portion 10. The conical portion 10 has a second connecting plate 12 formed inside the small diameter end thereof, and
Multiple jet water injection holes 13 on the peripheral wall of the large diameter side end
are drilled at equal intervals toward the small diameter side. 16
is a pressure water pipe that communicates with the jet water injection hole 13. The second connection plate 12 includes, for example, bolts 14
It is detachably connected to the first connecting plate 8 by a nut 15. A pressure water pipe 16 is connected to each jet water injection hole 13. The cylindrical part 11 is
Its outer diameter is equal to the outer diameter C of the new tube 3, and the new tube 3 is connected to the rear end.
次に、布設替え方法を第１図〜第３図にもとづ
いて説明する。既設管１７は、コンクリート管、
鋳鉄管などで形成されており、その複数個が地中
に直線状に埋設されている。まず、布設替えすべ
き既設管１７の管路に沿い距離をおいて、それぞ
れ発進坑１８および到達坑１９を地上から開削す
る。次に、発進坑１８内において、新管３の最初
のものを圧密ヘツド４の後端面に接続する。次
に、破砕ヘツド２の案内部７を既設管１７の一端
からその内部に挿入し、ジヤツキ２０により新管
３の後端面に推力を負荷するとともに、圧力水管
１６内に圧力水を供給する。 Next, a method for replacing the cable installation will be explained based on FIGS. 1 to 3. The existing pipe 17 is a concrete pipe,
It is made of cast iron pipes, and multiple pieces are buried in a straight line underground. First, a starting shaft 18 and a reaching shaft 19 are excavated from the ground at a distance along the existing pipe 17 to be replaced. Next, the first of the new pipes 3 is connected to the rear end face of the consolidation head 4 in the launch shaft 18. Next, the guide part 7 of the crushing head 2 is inserted into the existing pipe 17 from one end, and a thrust is applied to the rear end surface of the new pipe 3 by the jack 20, and pressure water is supplied into the pressure water pipe 16.
すると、破砕刃６が既設管１７内に押し込ま
れ、くさび作用により刃先９が既設管１７の管壁
を破砕しながら推進される。同時に、圧力水管１
６内に供給された圧力水が各ジエツト水噴射孔１
３からジエツト水となつて噴出し、周囲の地山を
堀削・拡大し、その跡に新管３を進入させる。こ
のとき発生した既設管１７の破砕片２１は新管３
の周囲に順次残されて行くが、前記ジエツト水が
周囲の地山を拡大かつ軟化しているので、地山が
圧密されるおそれはない。したがつて、地山の圧
密による近傍の管路や地表面への悪影響は完全に
防止される。 Then, the crushing blade 6 is pushed into the existing pipe 17, and the cutting edge 9 is propelled while crushing the wall of the existing pipe 17 due to the wedge action. At the same time, pressure water pipe 1
Pressure water supplied to each jet water injection hole 1
Jet water is gushing out from 3, excavating and expanding the surrounding ground, and the new pipe 3 enters into its wake. The crushed pieces 21 of the existing pipe 17 that occurred at this time are the new pipe 3.
However, since the jet water expands and softens the surrounding ground, there is no risk of compaction of the surrounding ground. Therefore, any negative impact on nearby pipelines and the ground surface due to consolidation of the ground is completely prevented.
他方、地山の堀削土２２の一部は既設管１７内
に入り込むが、前記ジエツト水により到達坑１９
の方に押し流される。以後、既設管１７の破砕の
進行に伴つて新管３を次々に接続し、破砕ヘツド
２および圧密ヘツド４が到達坑１９内に達すると
両者２，４を新管３から切り離して搬出する。か
くして布設替えを完了する。 On the other hand, a part of the excavated soil 22 from the ground enters the existing pipe 17, but the jet water prevents it from reaching the shaft 19.
be swept away towards. Thereafter, as the existing pipe 17 is crushed, new pipes 3 are connected one after another, and when the crushing head 2 and consolidation head 4 reach the reaching shaft 19, both 2 and 4 are separated from the new pipe 3 and carried out. In this way, the cabling replacement is completed.
既設管１７のサイズは同じであるが、新管３の
サイズを変える必要がある場合には、第１、第２
接続板８，１２において破砕ヘツド２から圧密ヘ
ツド４を分離し、圧密ヘツド４のみを別のものに
交換するだけでよい。 The size of the existing pipe 17 is the same, but if it is necessary to change the size of the new pipe 3, the first and second
It is only necessary to separate the consolidation head 4 from the crushing head 2 at the connecting plates 8, 12 and replace only the consolidation head 4 with another one.
なお、他の実施例として、第４図に示すよう
に、破砕ヘツド２の胴部５を円錐部２３と円筒部
２４とから形成し、圧密ヘツド４を円錐状の短い
接続アダプタとしてもよい。この場合、破砕刃６
は円錐部２３の外周面に固着され、円筒部２４は
その外径が既設管１７の外径Ｄに等しく形成さ
れ、圧密ヘツド４は円筒部２４に着脱自在に接続
されている。 As another embodiment, as shown in FIG. 4, the body 5 of the crushing head 2 may be formed of a conical part 23 and a cylindrical part 24, and the consolidation head 4 may be a short conical connection adapter. In this case, the crushing blade 6
is fixed to the outer peripheral surface of the conical part 23, the cylindrical part 24 has an outer diameter equal to the outer diameter D of the existing pipe 17, and the consolidation head 4 is detachably connected to the cylindrical part 24.
考案の効果
以上述べたように本考案によれば、破砕ヘツド
と圧密ヘツドとが着脱自在に接続されているの
で、新管のサイズを変える必要がある場合には圧
密ヘツドのみを取り替えればよく、破砕ヘツドは
既設管のサイズが変わらない限り変える必要はな
い。したがつて、高価な破砕ヘツドの種類が少な
くてすみ、経済的である。また、この圧密ヘツド
の円錐部により、新管の口径が既設管の口径より
も大きい場合にも、破砕した既設管の破片を外方
に押し退けて容易に新管を布設替えすることがで
きる。なお、ジエツト水噴射を併用することによ
り、地山の圧密による近傍の管路や地表面への悪
影響を防止することができる。Effects of the invention As described above, according to the invention, the crushing head and the consolidation head are removably connected, so if it is necessary to change the size of the new pipe, only the consolidation head needs to be replaced. , the crushing head does not need to be changed unless the size of the existing pipe changes. Therefore, the number of types of expensive crushing heads is reduced, making it economical. Furthermore, even if the diameter of the new pipe is larger than the diameter of the existing pipe, the conical part of the consolidation head allows the crushed fragments of the existing pipe to be pushed away and the new pipe can be easily replaced. In addition, by using jet water injection in combination, it is possible to prevent adverse effects on nearby pipes and the ground surface due to consolidation of the ground.
第１図は本考案の一実施例を示す一部切欠き正
面図、第２図は第１図における右側面図、第３図
は管路の布設替え方法の一実施例を示す断面図、
第４図は本考案の他の実施例を示す正面図であ
る。
２……破砕ヘツド、３……新管、４……圧密ヘ
ツド、１０……円錐部、１７……既設管。
FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a right side view in FIG.
FIG. 4 is a front view showing another embodiment of the present invention. 2... Crushing head, 3... New pipe, 4... Consolidation head, 10... Conical part, 17... Existing pipe.
Claims (1)
の既設管を前記新管前方に取り付けた破砕ヘツド
で破砕しながらこの破砕ヘツドに続く前記新管に
布設替えするための装置であつて、前記破砕ヘツ
ドと新管との間に圧密ヘツドが介装され、この圧
密ヘツドは円錐部を有し、この円錐部小径側端部
が前記破砕ヘツドに着脱自在に接続され、前記円
錐部大径側端部が前記新管の外径と等しい外径に
形成されて前記円錐部大径側に前記新管を接続可
能に構成したことを特徴とする既設管の布設替え
装置。 A device for crushing an existing underground pipe with a crushing head attached to the front of the new pipe by applying a thrust force to the rear end face of the new pipe, and then reinstalling the pipe into the new pipe following the crushing head, A consolidation head is interposed between the crushing head and the new pipe, this consolidation head has a conical part, the small diameter end of the conical part is detachably connected to the crushing head, and the conical part has a large diameter end. An apparatus for replacing existing pipes, characterized in that a side end portion is formed to have an outer diameter equal to the outer diameter of the new pipe, so that the new pipe can be connected to the larger diameter side of the conical part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986127291U JPH0425578Y2 (en) | 1986-08-20 | 1986-08-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986127291U JPH0425578Y2 (en) | 1986-08-20 | 1986-08-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6333080U JPS6333080U (en) | 1988-03-03 |
| JPH0425578Y2 true JPH0425578Y2 (en) | 1992-06-18 |
Family
ID=31021900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986127291U Expired JPH0425578Y2 (en) | 1986-08-20 | 1986-08-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425578Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61180082A (en) * | 1985-01-10 | 1986-08-12 | ブリテイツシユ ガス コーポレーシヨン | Piping breaking tool |
-
1986
- 1986-08-20 JP JP1986127291U patent/JPH0425578Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61180082A (en) * | 1985-01-10 | 1986-08-12 | ブリテイツシユ ガス コーポレーシヨン | Piping breaking tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6333080U (en) | 1988-03-03 |
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