阅读说明：本技术 一种非开挖柔性管管道更换破裂刀具 (Non-excavation flexible pipe pipeline is changed and is broken cutter ) 是由 黄雷 钟伟斌 金诚 唐睿 马孝春 李子明 罗汉 罗健 邹小强 潘奇 于 2019-11-15 设计创作，主要内容包括：本发明公开了一种非开挖柔性管道更换破裂刀具。刀具主体具有渐变截面的空心圆柱体形状,渐变圆柱体形状使得刀具在破开原有管道的同时将破开的管道进行撑张,以便新管道的拉入。空心的特性使得用于牵引刀具的钢缆可以伸入并进行插销固定,同时也使得刀具牵引端可以伸入并进行插销连接。刀片为可更换刀片,在刀片变钝或者损坏时可以随时更换,无需更换刀具整体,方便快捷。刀片可以布置为单刀式,双刀式或者三刀式,根据管道的直径、材质等特征进行选择。牵引端为可拆卸部件,与刀具主体使用插销进行连接,便于牵引端的拆卸,牵引端拆卸后与新管道使用螺纹拧紧后再使用插销与刀具主体进行连接,避免了对新管道进行拧动。(The invention discloses a breaking cutter for replacing a non-excavation flexible pipeline. The cutter main part has the hollow cylinder shape of gradual change cross section, and gradual change cylinder shape makes the cutter prop the pipeline of will breaking open when breaking original pipeline to draw in of new pipeline. The hollow nature allows the wire rope used to pull the cutter to be inserted and pinned while also allowing the cutter pulling end to be inserted and pinned. The blade is the removable blade, can change at any time when the blade becomes dull or damages, need not to change the cutter wholly, convenient and fast. The blades can be arranged in a single-blade type, a double-blade type or a triple-blade type, and are selected according to the characteristics of the diameter, the material and the like of the pipeline. Draw the end and be detachable part, use the bolt with the cutter main part and be connected, be convenient for draw the dismantlement of end, draw the end and use the bolt to be connected with the cutter main part after dismantling with new pipeline and screw up, avoided twisting new pipeline and moved.)

1. The utility model provides a non-excavation flexible pipeline changes cutter that breaks which characterized in that: comprises a cutter body, a blade and a traction end;

the cutter body has a hollow cylindrical shape with a gradually changed section;

the blade is detachably connected with the cutter body; the traction end is a detachable component, one end of the traction end is detachably connected with the cutter main body, and the other end of the traction end is provided with a structure detachably connected with a new pipeline; the hollow part of the cutter body is used for a connecting steel cable to penetrate through, and the cutter body is provided with a structure used for being connected with the connecting part of the steel cable.

2. A trenchless flexible pipe replacement fracturing cutter as claimed in claim 1 wherein: one, two or three blade mounting grooves are reserved on the cutter body; when two or three blade mounting grooves are provided, the blade mounting grooves are uniformly arranged in the circumferential direction of the cutter main body; the wall of each blade mounting groove is provided with a blade mounting fixing hole, the side surface of the blade body of each blade is provided with a corresponding fixing hole, and the cutter body and the blades are detachably connected through the mounting fixing holes by adopting connecting pieces.

3. The trenchless flexible pipe replacement fracturing cutter of claim 1, wherein: the cutter body is provided with a steel cable fixing hole at the hollow part and is detachably connected with the steel cable connecting part.

4. The trenchless flexible pipe replacement fracturing cutter of claim 1, wherein: the tail of the cutter main body is provided with a traction end connecting hole for detachably connecting with a traction end.

5. The trenchless flexible pipe replacement fracturing cutter of claim 1, wherein: the traction end is connected with the cutter body through a bolt, and the connection structure of the traction end and a new pipeline adopts an external thread structure or an internal thread structure.

Technical Field

The invention relates to the technical field of trenchless, in particular to a tool for replacing and breaking a trenchless flexible pipe.

Background

After the 80 s of the last century, the flexible drainage pipeline has the obvious advantages of light weight, corrosion resistance, easy installation, small water flow resistance and the like, and is widely applied to domestic drainage pipelines. In recent years, it has been found that in areas with poor geological conditions, weak ground and coastal areas, such pipes suffer serious structural defects such as deformation and collapse soon after being buried. Because the underground pipeline is buried underground for a long time, when the pipeline per se has problems, the pipeline can be overhauled, maintained and replaced after being excavated according to the traditional method. This results in a considerable increase in the maintenance costs of underground pipelines as compared to open air pipelines.

In order to overcome the problem of difficulty in replacing underground pipelines, people propose a non-excavation pipeline replacing mode. Traditional trenchless pipeline replacement is mostly used in rigid pipelines, and besides an external traction device, a breaking cutter is matched with a power device in the trenchless technology, so that the breaking cutter is huge. However, no fracturing knife exists that is dedicated to service flexible pipe.

Disclosure of Invention

In view of the above technical problems in the prior art, the present invention provides a trenchless flexible pipe replacement breaking tool. Therefore, the invention adopts the following technical scheme:

the utility model provides a non-excavation flexible pipeline changes cutter that breaks which characterized in that: comprises a cutter body, a blade and a traction end;

the cutter body has a hollow cylindrical shape with a gradually changed section;

the blade is detachably connected with the cutter body; the traction end is a detachable component, one end of the traction end is detachably connected with the cutter main body, and the other end of the traction end is provided with a structure detachably connected with a new pipeline; the hollow part of the cutter body is used for a connecting steel cable to penetrate through, and the cutter body is provided with a structure used for being connected with the connecting part of the steel cable.

Further: one, two or three blade mounting grooves are reserved on the cutter body; when two or three blade mounting grooves are provided, the blade mounting grooves are uniformly arranged in the circumferential direction of the cutter main body; the wall of each blade mounting groove is provided with a blade mounting fixing hole, the side surface of the blade body of each blade is provided with a corresponding fixing hole, and the cutter body and the blades are detachably connected by adopting a connecting piece through the blade mounting fixing holes and the fixing holes.

Further: the cutter body is provided with a steel cable fixing hole at the hollow part and is detachably connected with the steel cable connecting part.

Further: the tail of the cutter main body is provided with a traction end connecting hole for detachably connecting with a traction end.

Further: the traction end is connected with the cutter body through a bolt, and the connection structure of the traction end and a new pipeline adopts an external thread structure or an internal thread structure.

The invention provides a breaking cutter for replacing a non-excavation flexible pipeline, which is used for replacing a relatively flexible pipeline used at present. The cracking cutter consists of a cutter body, a blade and a traction end, wherein the cutter body is in a column shape with a gradually changed section, and the installation of the blade and the distraction effect of the broken pipe on the original pipeline are considered so as to pull in a new pipe; the blade is designed to be replaceable as a vulnerable part, and the arrangement mode of the blade can be selected according to the difficulty of pipeline cutting; the traction end takes the connection problem of a new pipeline and the cutter body into consideration and is designed into detachable threaded connection. When the device is used together with traction devices such as a winch and the like, in-situ replacement of a small pipeline can be realized, and the problems of high cost, surface environment damage and the like caused by excavation are solved.

The invention has the beneficial effects that:

1. compared with the replacement of pipelines after excavation, the replacement of non-excavation pipelines saves the working procedure of soil body excavation, avoids the problems of traffic control, potential safety hazards and the like, and saves the cost.

2. Compare traditional shield structure machines excavation, the non-excavation pipeline is changed and is broken the cutter and can be used for flexible pipeline, and the cutter itself need not extra power device.

3. The cutter body has a hollow cylindrical shape of a gradually changing cross section. The gradual change cylinder shape makes the cutter prop open the pipeline that opens when breaking original pipeline to the drawing-in of new pipeline. The hollow nature allows the wire rope used to pull the cutter to be inserted and pinned while also allowing the cutter pulling end to be inserted and pinned.

4. The blade is the removable blade, can change at any time when the blade becomes dull or damages, need not to change the cutter wholly, convenient and fast. Meanwhile, the blades can be arranged in a single-blade type, a double-blade type or a three-blade type, and are selected according to the characteristics of the diameter, the material and the like of the pipeline.

5. The traction end is a detachable part and is connected with the cutter body through a bolt. The connection mode is convenient for the disassembly of the traction end, the traction end is connected with a new pipeline through threads after being disassembled, and then the traction end connected with the new pipeline is connected with the cutter main body. The connection design is convenient and fast and can be repeatedly used.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a three-dimensional schematic view of a single-blade trenchless flexible pipe replacement fracturing cutter;

FIG. 2 is a front view of a single blade trenchless flexible pipe replacement fracturing cutter;

FIG. 3 is a schematic view of a blade;

FIG. 4 is a schematic drawing end view;

FIG. 5 is a schematic view of the threaded connection of the pulling end to the new pipe;

FIG. 6 is a schematic view of the end of the mating wire rope connected to the cutter;

FIG. 7 is a three-dimensional schematic view of a double-blade trenchless flexible pipe replacement breaking tool;

figure 8 is a front view of a double blade trenchless flexible pipe replacement fracturing cutter;

FIG. 9 is a three-dimensional schematic view of a three-blade trenchless flexible pipe replacement fracturing cutter;

figure 10 is an elevation view of a three-blade trenchless flexible pipe replacement fracturing cutter.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.