JP3873224B2

JP3873224B2 - Intrusion pump transport cylinder

Info

Publication number: JP3873224B2
Application number: JP33139496A
Authority: JP
Inventors: 孝之安間
Original assignee: 石川島建機株式会社
Priority date: 1996-11-28
Filing date: 1996-11-28
Publication date: 2007-01-24
Anticipated expiration: 2016-11-28
Also published as: JPH10159720A

Description

【０００１】
【発明の属する技術分野】
本発明はコンクリートの如き高粘性流体を扱う貫入式ポンプの輸送シリンダに関するものである。
【０００２】
【従来の技術】
コンクリートの如き高粘性流体を扱うポンプとしては、図３に概略を示す如く、ホッパ１内に２本の輸送シリンダ２をその軸心方向に往復動自在に且つ平行に貫入し、該各輸送シリンダ２をＮｏ．１の２本の貫入シリンダ３，４とＮｏ．２の２本の貫入シリンダ５，６により交互に前進後退させるようにし、前進動作によって輸送シリンダ２がホッパ１の受管７に嵌合すると、次に該輸送シリンダ２内の圧送ピストン８が圧送シリンダ９により前進させられて輸送シリンダ２内に取り込まれている被吐出流体を揺動管１０内を通して吐出させるようにしてあり、上記揺動管１０を揺動シリンダ１１，１２により左右へ揺動させながら各輸送シリンダ２を交互に前進させることにより順次流体を吐出させるようにした貫入式ポンプが提案されている（特開昭６１−２５９７７５号）。
【０００３】
上記貫入式ポンプの場合、上述した如く、輸送シリンダ２をホッパ１内で往復動させる型式であるため、輸送シリンダ２の外周面、特に、貫入先端側の外周面には早期に縦疵による摩耗が生じ、その結果、使用不能に至り、ランニングコストを引き上げる要因となっている。そのため、図４に一例を示す如く、輸送シリンダ２を、輸送シリンダ本体１３と、該輸送シリンダ本体１３の先端にビス１５等により着脱可能に取り付けた貫入管１４とからなる構成とし、貫入管１４を随時交換することにより輸送シリンダ本体１３の寿命を延ばして、輸送シリンダ２全体としてのランニングコストの低減化を図るようにしている。
【０００４】
しかし、輸送シリンダ２を、輸送シリンダ本体１３の先端に対して貫入管１４を交換できるように取り付けた構成とした場合でも、貫入管１４は比較的早期に摩耗してしまうので、貫入管１４が交換時期に至るまでの間にその摩耗が輸送シリンダ本体１３側にも及んでしまい、全体としての寿命を思うように延ばすことができないのが実情である。
【０００５】
そのため、近年、貫入管に発生した摩耗が輸送シリンダ本体に及ぶのを努めて防止し、寿命を延ばして全体的なランニングコストを低減することができるようにするために、図５に一例を示す如く、輸送シリンダ本体１３の先端に貫入管１４を接続した貫入式ポンプの輸送シリンダ２において、上記輸送シリンダ本体１３の先端部外周面部に、超硬リング１６を貫入管取付用段部１３ａを利用して嵌設し、貫入管１４の外周部が摩耗しても輸送シリンダ本体１３に及ぶことがないようにしたものが提案されている（実願平４−５０４２３号）。
【０００６】
上記のように輸送シリンダ本体１３と貫入管１４との境目の外側に超硬リング１６を嵌設させた構成とすれば、輸送シリンダ２の外周面の摩耗を防止する上で有利である。
【０００７】
【発明が解決しようとする課題】
ところが、貫入式ポンプの輸送シリンダは、ホッパ底部での往復動作により苛酷な土砂摩耗環境に置かれており、ホッパ内への貫入時の打撃摩耗により、前面、外面のみならず内面においても摩耗速度が早く、特に、貫入管の内面の摩耗進行は輸送シリンダ本体にも波及していることが判明し、輸送シリンダ内径が大きくなってピストンの張り代がなくなり、シリンダ内部の流体圧力を保持できなくなって、早期に吐出不可能になることがわかった。
【０００８】
そこで、本発明は、摩耗の激しい貫入管の内面摩耗に輸送シリンダ本体が影響を受けないようにしようとするものである。
【０００９】
【課題を解決するための手段】
本発明は、上記課題を解決するために、輸送シリンダ本体の先端に貫入管を接続し、ホッパ内に貫入させるときにホッパ内の流体を内部に取り込むようにしてある貫入式ポンプの輸送シリンダにおいて、上記輸送シリンダ本体と貫入管との境目における輸送シリンダ本体の先端部の内径部に超硬リングを埋設する。具体的には、輸送シリンダ本体の先端内径部に切欠部を設けて該切欠部に嵌着させた超硬リングを該切欠部と貫入管後端との間に埋設するか、又は輸送シリンダ本体の先端部の内径部に一連の溝をリング状に設け、該溝内に超硬リングを嵌め込んで埋設してなる構成とする。
【００１０】
貫入管がホッパ内へ貫入されるときの打撃摩耗で内径が大きくなっても、輸送シリンダ本体の先端部の内径部に超硬リングが埋設してあるので、貫入管内面の摩耗が輸送シリンダ本体に波及することがなく、輸送シリンダ本体の内径が大きくなることがなくなり、ポンプ性能を長期間にわたり維持できる。
【００１１】
又、輸送シリンダ本体と貫入管との境目における貫入管の後端内径部に切欠を設け、該切欠部に超硬リングを嵌着させて該切欠部と輸送シリンダ本体の先端との間に埋設しても、貫入管内面の摩耗が輸送シリンダ本体側へ波及するのを超硬リングで防止できる。
【００１２】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照して説明する。
【００１３】
図１は本発明の実施の形態を示すもので、図４や図５に示す場合と同様に、輸送シリンダ本体１３の先端に貫入管１４を着脱可能にビス１５にて取り付けてなる輸送シリンダ２において、輸送シリンダ本体１３と貫入管１４との境目となる輸送シリンダ本体１３の前端の内径部に、切欠部１７を全周にわたり設けて、該切欠部１７内に、内径を輸送シリンダ本体１３の内径と一致させるように形成したタングステンカーバイド製等の如き超硬リング１８を嵌着させて、貫入管１４との間に埋設させるようにする。
【００１４】
輸送シリンダ本体１３の前端内径部に超硬リング１８を埋め込んでおくと、輸送シリンダ２が前進してホッパ内に貫入されるときの打撃摩耗により貫入管１４の内径部の摩耗が進行して該貫入管１４の内径が大きくなるようになっても、上記輸送シリンダ本体１３と貫入管１４との境目に埋め込んだ超硬リング１８により内面の摩耗進行が輸送シリンダ本体１３へ波及することを未然に防止することができる。これにより輸送シリンダ本体１３の内径が大きくなることがなくなって、圧送ピストン８の前進操作で輸送シリンダ２内の高粘性流体を確実に吐出させることができ、長期間にわたりポンプ作用を維持させることが可能となる。
【００１５】
なお、上記実施の形態では、輸送シリンダ本体１３の前端内径部に切欠部１７を設けて、この切欠部１７に超硬リング１８を嵌めて埋め込む場合を示したが、図２（イ）に示す如く輸送シリンダ本体１３の前端部の内周面に一連の溝１９を形成して、この溝１９に超硬リング１８を嵌め込んで取り付けるようにしてもよく、又、図２（ロ）に示す如く、貫入管１４の後端内径部に切欠部２０を設けて、この切欠部２０に超硬リング１８を嵌めて埋め込むようにしても、貫入管１４の内径部が摩耗で大きくなっても、超硬リング１８で輸送シリンダ本体１３への摩耗の進行を防止することができる。
【００１６】
【発明の効果】
以上述べた如く、本発明の貫入式ポンプの輸送シリンダによれば、輸送シリンダを構成する輸送シリンダ本体と貫入管の境目における輸送シリンダ本体の先端部の内径部に超硬リングを埋設する。具体的には、輸送シリンダ本体の先端内径部に切欠を設け、該切欠部に超硬リングを嵌着して該切欠部と貫入管後端との間に埋設するか、又は輸送シリンダ本体の先端部の内径部に一連の溝をリング状に設け、該溝内に超硬リングを嵌め込んで埋設してなる構成とし、更に、上記輸送シリンダ本体と貫入管の境目における貫入管の後端内径部に切欠を設けて、該切欠部に嵌着させた超硬リングを該切欠部と輸送シリンダ本体の先端との間に埋設した構成としてあるので、ホッパ内へ貫入されるときに高粘性流体が貫入管から輸送シリンダ本体内へ取り込まれるときに、打撃摩耗により貫入管の内径が大きくなっても、輸送シリンダ本体に波及することを防止できて、輸送シリンダ本体の内径が摩耗により大径になることがなく、長期間にわたりポンプ性能を維持でき、ランニングコストを最小限度に抑えることができる、という優れた効果を奏し得る。
【図面の簡単な説明】
【図１】本発明の貫入式ポンプの輸送シリンダの実施の一形態を示す要部の拡大断面図である。
【図２】本発明の貫入式ポンプの輸送シリンダの他の実施の形態を示すもので、（イ）は溝に超硬リングを嵌めたもの、（ロ）は貫入管に超硬リングを嵌めたものを示す図である。
【図３】貫入式ポンプの一例の概要を示す切断平面図である。
【図４】従来の貫入式ポンプの輸送シリンダの先端部の一例を示す断面図である。
【図５】近年提案されている貫入式輸送シリンダの先端部の一例を示す断面図である。
【符号の説明】
１ホッパ
２輸送シリンダ
８圧送ピストン
１３輸送シリンダ本体
１４貫入管
１５ビス
１７切欠部
１８超硬リング
１９溝
２０切欠部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transport cylinder of an intrusive pump that handles a highly viscous fluid such as concrete.
[0002]
[Prior art]
As shown in FIG. 3, as a pump for handling a highly viscous fluid such as concrete, two transport cylinders 2 are inserted into a hopper 1 so as to reciprocate in the axial direction and in parallel. 2 No. No. 1 two penetration cylinders 3 and 4 and No. 1 When the transport cylinder 2 is fitted into the receiving tube 7 of the hopper 1 by the forward movement, the pressure feed piston 8 in the transport cylinder 2 is then pumped. The discharged fluid that has been advanced by the cylinder 9 and taken into the transport cylinder 2 is discharged through the oscillating tube 10, and the oscillating tube 10 is oscillated left and right by the oscillating cylinders 11 and 12. However, there has been proposed a penetrating pump in which the fluid is sequentially discharged by advancing the respective transport cylinders 2 alternately (Japanese Patent Laid-Open No. 61-259775).
[0003]
In the case of the penetrating pump, as described above, since the transport cylinder 2 is reciprocated in the hopper 1, the outer peripheral surface of the transport cylinder 2, particularly the outer peripheral surface on the penetrating tip side, is quickly worn by vertical shafts. As a result, the system becomes unusable and increases the running cost. Therefore, as shown in FIG. 4, the transport cylinder 2 includes a transport cylinder body 13 and a penetration pipe 14 that is detachably attached to the tip of the transport cylinder body 13 with screws 15 or the like. As necessary, the life of the transport cylinder body 13 is extended to reduce the running cost of the transport cylinder 2 as a whole.
[0004]
However, even when the transport cylinder 2 is configured to be attached to the tip of the transport cylinder body 13 so that the penetration pipe 14 can be replaced, the penetration pipe 14 is worn relatively early. The actual situation is that the wear reaches the transport cylinder body 13 side until the replacement time and cannot be extended as long as the entire life is expected.
[0005]
Therefore, an example is shown in FIG. 5 in order to prevent wear generated in the penetrating pipe in recent years from reaching the main body of the transport cylinder and to extend the life and reduce the overall running cost. As described above, in the transport cylinder 2 of the penetrating pump in which the penetrating pipe 14 is connected to the tip of the transport cylinder body 13, the carbide ring 16 is used on the outer peripheral surface of the tip of the transport cylinder body 13 and the step 13a for penetrating pipe mounting is used. It has been proposed that even if the outer periphery of the penetrating pipe 14 is worn, it does not reach the transport cylinder body 13 (Japanese Patent Application No. 4-50423).
[0006]
If the carbide ring 16 is fitted outside the boundary between the transport cylinder body 13 and the penetration tube 14 as described above, it is advantageous in preventing wear on the outer peripheral surface of the transport cylinder 2.
[0007]
[Problems to be solved by the invention]
However, the transport cylinder of the penetrating pump is placed in a severe earth and sand wear environment due to the reciprocating motion at the bottom of the hopper. In particular, it was found that the progress of wear on the inner surface of the penetrating pipe also spread to the transport cylinder body, the inner diameter of the transport cylinder becomes larger, the piston tension is eliminated, and the fluid pressure inside the cylinder cannot be maintained. As a result, it was found that it became impossible to discharge quickly.
[0008]
Therefore, the present invention is intended to prevent the transport cylinder body from being affected by the wear of the inner surface of the penetrating pipe with severe wear.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a transport cylinder for a penetrating pump in which a penetration pipe is connected to the tip of a transport cylinder body and fluid in the hopper is taken into the hopper when penetrating into the hopper. A carbide ring is embedded in the inner diameter portion of the tip of the transport cylinder body at the boundary between the transport cylinder body and the penetration pipe . Or specifically, to bury the carbide ring is fitted to the cutout portion is provided a notch in the distal end inner diameter portion of the transport cylinder body between the cutout portion and the penetration tube rear end, or transport cylinder body A series of grooves are provided in a ring shape in the inner diameter portion of the tip portion of the steel, and a carbide ring is fitted into the groove and embedded .
[0010]
Even if the inner diameter becomes large due to impact wear when the penetrating pipe penetrates into the hopper, a carbide ring is embedded in the inner diameter part of the tip of the transport cylinder body, so the wear on the inner surface of the penetrating pipe causes the transport cylinder body to wear out. And the pump cylinder performance can be maintained over a long period of time.
[0011]
Also, a notch is provided in the inner diameter of the rear end of the penetrating pipe at the boundary between the transport cylinder body and the penetrating pipe, and a carbide ring is fitted into the notch and embedded between the notch and the tip of the transport cylinder body. Even so, the carbide ring can prevent wear on the inner surface of the penetrating pipe from spreading to the transport cylinder body side.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 shows an embodiment of the present invention. Similarly to the case shown in FIGS. 4 and 5, a transport cylinder 2 in which a penetration tube 14 is detachably attached to the tip of a transport cylinder main body 13 with screws 15. , A notch 17 is provided over the entire circumference at the inner diameter portion of the front end of the transport cylinder body 13 which is the boundary between the transport cylinder body 13 and the penetration pipe 14, and the inner diameter is within the notch 17. A carbide ring 18 made of tungsten carbide or the like formed so as to coincide with the inner diameter is fitted and embedded between the penetration pipe 14.
[0014]
If the carbide ring 18 is embedded in the inner diameter portion of the front end of the transport cylinder body 13, wear of the inner diameter portion of the penetration pipe 14 proceeds due to impact wear when the transport cylinder 2 moves forward and penetrates into the hopper. Even if the inner diameter of the penetrating pipe 14 is increased, it is possible to prevent the progress of wear on the inner surface from spreading to the transport cylinder main body 13 by the carbide ring 18 embedded in the boundary between the transport cylinder main body 13 and the penetrating pipe 14. Can be prevented. As a result, the inner diameter of the transport cylinder body 13 does not increase, and the high-viscosity fluid in the transport cylinder 2 can be reliably discharged by the forward operation of the pumping piston 8, and the pump action can be maintained over a long period of time. It becomes possible.
[0015]
In the above embodiment, a case has been described in which the notch 17 is provided in the inner diameter of the front end of the transport cylinder body 13 and the carbide ring 18 is fitted and embedded in the notch 17, but is shown in FIG. In this way, a series of grooves 19 may be formed on the inner peripheral surface of the front end portion of the transport cylinder body 13, and a carbide ring 18 may be fitted into the groove 19 and attached, as shown in FIG. Thus, even if the notch 20 is provided in the inner diameter of the rear end of the penetrating tube 14 and the carbide ring 18 is fitted and embedded in the notched portion 20, the inner diameter of the penetrating tube 14 becomes larger due to wear. The carbide ring 18 can prevent the wear on the transport cylinder body 13 from progressing.
[0016]
【The invention's effect】
As described above, according to the transport cylinder of the penetration pump of the present invention , the carbide ring is embedded in the inner diameter portion of the front end portion of the transport cylinder main body at the boundary between the transport cylinder main body and the penetration pipe constituting the transport cylinder . Specifically, a notch is provided in the inner diameter portion of the front end of the transport cylinder body, and a carbide ring is fitted into the notch portion and embedded between the notch portion and the rear end of the penetration tube, or A series of grooves are provided in a ring shape in the inner diameter part of the tip part, and a carbide ring is fitted in the groove and embedded, and the rear end of the penetration pipe at the boundary between the transport cylinder body and the penetration pipe A notch is provided in the inner diameter, and a carbide ring fitted in the notch is embedded between the notch and the tip of the transport cylinder body. When fluid is taken into the transport cylinder body from the penetrating pipe, even if the inner diameter of the penetrating pipe increases due to impact wear, it can be prevented from spreading to the transport cylinder body. Over the long term without becoming Pump performance can be maintained, it is possible to suppress the running cost to a minimum, an excellent effect.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a main part showing an embodiment of a transport cylinder of an intrusion pump according to the present invention.
FIGS. 2A and 2B show another embodiment of a transport cylinder of an intrusion pump according to the present invention, in which FIG. 2A shows a carbide ring fitted in a groove, and FIG. 2B shows a carbide ring fitted in a penetration pipe. FIG.
FIG. 3 is a cut plan view showing an outline of an example of the penetrating pump.
FIG. 4 is a cross-sectional view showing an example of a tip portion of a transport cylinder of a conventional penetrating pump.
FIG. 5 is a cross-sectional view showing an example of a tip portion of a penetrating transport cylinder proposed in recent years.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hopper 2 Transport cylinder 8 Pumping piston 13 Transport cylinder main body 14 Penetration pipe 15 Screw 17 Notch part 18 Carbide ring 19 Groove 20 Notch part

Claims

In a transport cylinder of a penetrating pump that connects a penetrating pipe to the tip of the transport cylinder body and takes in the fluid in the hopper when penetrating into the hopper, at the boundary between the transport cylinder body and the penetrating pipe . A transport cylinder for a penetrating pump, characterized in that a carbide ring is embedded in the inner diameter of the tip of the transport cylinder body.

In a transport cylinder of a penetrating pump that connects a penetrating pipe to the tip of the transport cylinder body and takes in the fluid in the hopper when penetrating into the hopper, at the boundary between the transport cylinder body and the penetrating pipe. A penetration type characterized in that a cutout is provided over the entire circumference of the tip inner diameter portion of the transport cylinder body, and a carbide ring is fitted into the cutout portion and embedded between the cutout portion and the rear end of the penetration tube. Pump transport cylinder.

In a transport cylinder of a penetrating pump that connects a penetrating pipe to the tip of the transport cylinder body and takes in the fluid in the hopper when penetrating into the hopper, at the boundary between the transport cylinder body and the penetrating pipe. A transport cylinder for a penetrating pump, characterized in that a series of grooves are provided in a ring shape in the inner diameter portion of the tip of the transport cylinder body, and a carbide ring is fitted in the groove and embedded .

Connect the penetration tube to the tip of the transport cylinder body, the transport cylinder penetration pump the fluid in the hopper are to capture therein when to penetrate into the hopper, in the boundary between the transport cylinder body and penetration tube provided at a rear end bore of the penetration tube notches over the entire circumference, it is characterized by being embedded between the notch portion by fitting the carbide ring cutout portion and the distal end of the transport cylinder body penetration Pump cylinder.