阅读说明：本技术 一种环切拔管施工工艺及环切拔管钻机 (Circular cutting pipe drawing construction process and circular cutting pipe drawing drilling machine ) 是由 姜志广 张景瑞 于 2020-06-21 设计创作，主要内容包括：本发明提供本发明提供了一种环切拔管施工工艺及环切拔管钻机,针对非开挖管道更换维修技术难点,利用环切拔管钻机,沿着待更换旧管道外壁切削出环形空间,实现待更换旧管道与周边泥土彻底剥离,沿着待更换旧管道外壁形成环形的空间,为后续拖离待更换旧管道和安装铺设新管道工作创造良好的施工前提,由于铣出的环形孔空间比原有的管道外径大,在施工过程中可以避免待更换旧管道的结构性损坏而造成的施工困难,同时可以通过再次扩孔的方式,按照设计需求重新铺设同样规格的新管,或更大规格的管道,彻底突破传统管道更新过程中,只能破坏旧管污染环境或缩小管道过流面积的缺陷,为城市待更换旧管道的更新与维护提供了新的思路和可行的方案。(The invention provides a circular cutting pipe-drawing construction process and a circular cutting pipe-drawing drilling machine, aiming at the technical difficulty of non-excavation pipeline replacement and maintenance, the circular cutting pipe-drawing drilling machine is utilized to cut an annular space along the outer wall of an old pipeline to be replaced, so as to realize the complete stripping of the old pipeline to be replaced and peripheral soil, form an annular space along the outer wall of the old pipeline to be replaced, create a good construction premise for the subsequent work of pulling away the old pipeline to be replaced and installing and laying a new pipeline, because the space of a milled annular hole is larger than the outer diameter of the original pipeline, the construction difficulty caused by the structural damage of the old pipeline to be replaced can be avoided in the construction process, simultaneously, a new pipeline with the same specification or a pipeline with larger specification can be re-laid according to the design requirement in a way of re-reaming, the defect that only the old pipeline pollutes the environment or the overflowing area of the pipeline can be reduced can be thoroughly broken through the traditional pipeline, provides a new idea and a feasible scheme for the updating and the maintenance of the old pipeline to be replaced in the city.)

1. The construction process of the circular cut drawn pipe is characterized by comprising the following steps:

(1) digging operation wells at two ends of the old pipeline to be replaced;

(2) arranging a circular cutting pipe drawing drilling machine in an operation well pit at one end of the old pipeline to be replaced, and selecting a circular cutting drill bit matched with the outer diameter of the old pipeline to be replaced;

(3) starting a drilling machine, drilling the annular cutting drill bit along the old pipeline to be replaced, performing annular cutting along the outer diameter of the old pipeline to be replaced, stripping the old pipeline to be replaced from peripheral soil, and stopping drilling when the annular cutting drill bit continuously drills through the operation well pit at the other end of the old pipeline to be replaced;

(4) connecting and fixing the ring cutting drill bit and the old pipeline to be replaced, and synchronously connecting a new pipeline;

(5) and controlling the drilling machine to pull back the drill rod, and pulling out the old pipeline to be replaced and bringing the old pipeline into a new pipeline.

2. The circular cutting pipe drawing construction process according to claim 1, wherein the circular cutting drill is a rotary cutting ring drill, and the inner diameter of the circular cutting drill is slightly larger than the outer diameter of the old pipeline to be replaced.

3. The circular cutting pipe drawing construction process according to claim 1, wherein in the step (3), in the drilling process of the circular cutting drill bit, high-pressure bentonite slurry is synchronously introduced to play a cooling and lubricating role, the drilled circular cutting hole wall is fixed, and the circular cutting soil is suspended and conveyed out.

4. A circular cutting tube drawing drill comprises a circular cutting drill bit, a first drill rod and a second drill rod which are parallel to each other, and is characterized in that the circular cutting drill bit is of a sleeve type structure, and the front end of the circular cutting drill bit is provided with a circular milling cutter; a driven gear is arranged on the circular cutting drill bit, and a circular cutting drill bit sheath is arranged on the outer side of the driven gear; a first drill rod sheath and a second drill rod sheath are respectively arranged on two sides of the circular cutting drill bit sheath; the first drill rod sheath is nested on the first drill rod, and the second drill rod sheath is nested on the second drill rod; the first drill rod sheath is communicated with the interior of the annular cutting drill bit sheath; and the first drill rod is provided with a driving gear meshed with the driven gear, and the driving gear is arranged in the first drill rod sheath.

5. The annular cutting and tube drawing drill according to claim 4, wherein the first and second drill rods each have a cutting bit thereon.

6. The ring-cut tube-drawing drill according to claim 4, characterized in that the rear end of the ring-cut drill bit may also be provided with a ring mill.

7. The annular cutting and tube drawing drill according to claim 4, wherein the gear drive relationship between the first drill rod and the annular cutting bit may be replaced by a chain or other drive means.

Technical Field

The invention relates to the technical field of trenchless construction, in particular to a circular cutting pipe drawing construction process and a circular cutting pipe drawing drilling machine.

Background

The non-excavation is a new construction technology for laying, replacing and repairing various underground pipelines by utilizing various rock-soil drilling equipment and technical means under the condition of excavating on a very small part of the earth surface (generally referred to as small-area excavation at an inlet and an outlet) in the modes of guiding, directional drilling and the like, does not obstruct traffic, does not damage green lands and vegetation, does not influence the normal life and work order of shops, hospitals, schools and residents, solves the problem that the traditional excavation construction interferes with the life of the residents, and damages and adverse effects on the traffic, environment and the foundation of surrounding buildings, and therefore has higher social and economic effects.

The trenchless construction process is widely applied to the construction work of underground pipelines, because the service life of the pipelines is limited, the old pipelines need to be replaced before the service life of the pipelines expires, and at present, the known methods for replacing the old pipelines in the underground of cities are as follows: grooving for newly burying a pipe, and cracking (expanding) the pipe.

The method has the disadvantages of large engineering quantity and high investment, not only damages the existing infrastructure, but also easily causes large-area traffic jam, seriously causes normal work and life of residents, and damages the environment to cause pollution;

the pipe cracking method (pipe expansion method) is to use a drilling machine with a pipe cracking head to crush an old pipeline, extrude the fragments of the pipeline into the surrounding soil, and pull in a new pipeline at the same time, thereby completing the processes of old pipe abandonment and new pipe laying at one time; the method has the disadvantages that the extrusion and vibration during crushing of the old pipe can cause public hazard to buildings around the city, crude oil slurry and other waste dirt in the crushed old pipe and the pipeline remain in soil to pollute the surface soil layer, and part of substances which are not easy to degrade can influence the plant growth and the ecological environment.

Therefore, how to take out the underground pipeline from the underground in a non-excavation mode to realize the replacement and repair of the pipeline in the true sense is a technical problem which needs to be solved urgently at present, the pipeline is buried underground all the year round, the soil layer around the pipeline can generate very stable extrusion on the pipeline under the action of gravity, the traditional non-development pipe drawing process is adopted, the extrusion force of the soil layer on the pipeline cannot be overcome, the pipeline is smoothly drawn out, the technical key for taking out the old pipeline in the non-excavation mode is realized, and the extrusion force of the soil layer around the pipeline is solved.

Disclosure of Invention

The invention aims to provide an annular cutting and pipe drawing construction process and an annular cutting and pipe drawing drilling machine, aiming at the technical difficulty of non-excavation pipeline replacement and maintenance, an annular space is cut along the outer wall of an old pipeline to be replaced by the annular cutting and pipe drawing drilling machine, the old pipeline to be replaced is thoroughly stripped from peripheral soil, the old pipeline can be easily pulled out and synchronously replaced by a new pipeline, the pipeline replacement in the true sense is realized, and the defects in the prior art are overcome.

The invention is realized by adopting the following technical scheme:

(1) digging operation wells at two ends of the old pipeline to be replaced;

(2) arranging a circular cutting pipe drawing drilling machine in an operation well pit at one end of the old pipeline to be replaced, and selecting a circular cutting drill bit matched with the outer diameter of the old pipeline to be replaced;

(3) starting a drilling machine, drilling the annular cutting drill bit along the old pipeline to be replaced, performing annular cutting along the outer diameter of the old pipeline to be replaced, stripping the old pipeline to be replaced from peripheral soil, and stopping drilling when the annular cutting drill bit continuously drills through the operation well pit at the other end of the old pipeline to be replaced;

(4) connecting and fixing the ring cutting drill bit and the old pipeline to be replaced, and synchronously connecting a new pipeline;

(5) and controlling the drilling machine to pull back the drill rod, and pulling out the old pipeline to be replaced and bringing the old pipeline into a new pipeline.

Preferably, in the step (2), the ring-cutting bit is a ring bit capable of rotary cutting, and the inner diameter of the ring bit is slightly larger than the outer diameter of the old pipeline to be replaced.

Preferably, in the step (3), in the process of drilling by the circular cutting drill bit, high-pressure bentonite slurry is synchronously introduced to play a cooling and lubricating role, the drilled circular cut hole wall is fixed, and the cut soil is suspended and sent out.

A circular cutting tube drawing drilling machine comprises a circular cutting drill bit, a first drill rod and a second drill rod which are parallel to each other;

the annular cutting drill bit is of a sleeve-shaped structure, and the front end of the annular cutting drill bit is provided with an annular milling cutter; a driven gear is arranged on the circular cutting drill bit, and a circular cutting drill bit sheath is arranged on the outer side of the driven gear; a first drill rod sheath and a second drill rod sheath are respectively arranged on two sides of the circular cutting drill bit sheath; the first drill rod sheath is nested on the first drill rod, and the second drill rod sheath is nested on the second drill rod;

the first drill rod sheath is communicated with the interior of the annular cutting drill bit sheath; and the first drill rod is provided with a driving gear meshed with the driven gear, and the driving gear is arranged in the first drill rod sheath.

Preferably, the first drill rod and the second drill rod are both provided with cutting drill bits.

Preferably, the rear end of the ring cutting drill bit may also be provided with a ring mill.

As an alternative to the present invention, the geared relationship between the first drill rod and the ring cutter bit may be replaced by a chain or other drive means.

The principle of the ring cutting drawbench of the invention is as follows:

the annular cutting drill bit is driven by the first drill rod and the second drill rod to drill forwards along an old pipeline to be replaced, the first drill rod and the second drill rod rotate and drive the driven gear to rotate through the driving gear of the first drill rod, the annular cutting drill bit is driven to rotate, soil around the old pipeline to be replaced is stripped by the annular milling cutter at the front end of the annular cutting drill bit, the annular cutting drill bit is drilled into an operation well pit at the other end of the old pipeline to be replaced, the old pipeline to be replaced and the annular cutting drill bit are connected and fixed, a new pipeline is connected at the same time, the drill rods are controlled to be pulled back, the old pipeline to be replaced is extracted, and the new pipeline is brought into the old pipeline.

The beneficial technical effects of the invention are as follows:

the invention provides a construction process of annular tube drawing, aiming at the technical difficulty of non-excavation pipeline replacement and maintenance, an annular space is cut along the outer wall of an old pipeline to be replaced by utilizing an annular tube drawing drilling machine, so that the old pipeline to be replaced is thoroughly stripped from peripheral soil, an annular space is formed along the outer wall of the old pipeline to be replaced, and a good construction premise is created for the subsequent work of pulling away the old pipeline to be replaced and installing and laying a new pipeline, because the milled annular hole space is larger than the outer diameter of the original pipeline, can avoid the construction difficulty caused by the structural damage of the old pipeline to be replaced in the construction process, meanwhile, a new pipe with the same specification can be re-laid according to the design requirement in a hole expanding mode again, or the pipeline with larger specification thoroughly breaks through the defect that only the old pipeline can be damaged to pollute the environment or reduce the flow area of the pipeline in the traditional pipeline updating process, and provides a new idea and a feasible scheme for updating and maintaining the old pipeline to be replaced in the city.

The invention also provides a circular cutting tube drawing drill which has simple structure and novel design and realizes circular cutting drilling along a pipeline, and the circular cutting tube drawing drill adopts a double-drill-rod driving mode, thereby not only improving the drilling power, but also ensuring the drilling stability of the drill; according to the invention, the cutting drill bits are arranged on the first drill rod and the second drill rod and work together with the ring cutting drill bit, so that the drilling efficiency is further improved.

Drawings

FIG. 1 is a schematic structural view of a ring cut drawn pipe drill of the present invention;

FIG. 2 is a schematic view of the ring-cut tube-drawing drill of the present invention with the ring-cut bit sheath and the first drill rod back sheath removed.

In the figure: 1. the annular cutting drill bit comprises an annular cutting drill bit body, 2, a first drill rod body, 3, a second drill rod body, 4, an annular milling cutter, 5, a driven gear, 6, an annular cutting drill bit sheath, 7, a first drill rod sheath, 8, a second drill rod sheath, 9, a driving gear, 10, a cutting drill bit and 11 and an old pipeline to be replaced.

Detailed Description

The invention will be better understood by the following description of embodiments thereof, but the applicant's specific embodiments are not intended to limit the invention to the particular embodiments shown, and any changes in the definition of parts or features and/or in the overall structure, not essential changes, are intended to define the scope of the invention.

The embodiment provides a circular cutting tube drawing construction process, which is characterized by comprising the following steps:

firstly, digging operation wells at two ends of an old pipeline to be replaced;

step two, arranging a circular cutting pipe drawing drilling machine in an operation well pit at one end of the old pipeline to be replaced, and selecting a circular cutting drill bit matched with the outer diameter of the old pipeline to be replaced;

starting a drilling machine, drilling the annular cutting drill bit along the old pipeline to be replaced, performing annular cutting along the outer diameter of the old pipeline to be replaced, stripping the old pipeline to be replaced from peripheral soil, and stopping drilling when the annular cutting drill bit continuously drills through the operation well pit at the other end of the old pipeline to be replaced;

step four, fixedly connecting the ring cutting drill bit with the old pipeline to be replaced, and synchronously connecting the new pipeline;

and step five, controlling the drilling machine to pull back the drill rod, and pulling out the old pipeline to be replaced and bringing the old pipeline into a new pipeline.

In the second step, the ring cutting drill bit is a rotary cutting ring drill bit, and the inner diameter of the ring cutting drill bit is slightly larger than the outer diameter of the old pipeline to be replaced.

And in the third step, in the drilling process of the circular cutting drill bit, high-pressure bentonite slurry is synchronously introduced to play a role in cooling and lubricating, the drilled circular cutting hole wall is fixed, and the soil obtained by circular cutting is suspended and sent out.

The embodiment also provides a circular cutting tube drawing drilling machine which comprises a circular cutting drill bit 1, a first drill rod 2 and a second drill rod 3 which are parallel to each other;

the ring cutting drill bit 1 is of a sleeve type structure, and the front end of the ring cutting drill bit is provided with a ring-shaped milling cutter 4; a driven gear 5 is arranged on the circular cutting drill bit 1, and a circular cutting drill bit sheath 6 is arranged on the outer side of the driven gear 5; a first drill rod sheath 7 and a second drill rod sheath 8 are respectively arranged on two sides of the circular cutting drill bit sheath 6; the first drill rod sheath 7 is nested on the first drill rod 2, and the second drill rod sheath 8 is nested on the second drill rod 3;

the first drill rod jacket 7 is communicated with the inside of the annular cutting drill bit jacket 6; and a driving gear 9 meshed with the driven gear 5 is arranged on the first drill rod 2, and the driving gear 9 is arranged in the first drill rod sheath 7.

The first drill rod 2 and the second drill rod 3 are both provided with cutting drill bits 10.

The principle of the ring cutting drawbench of the embodiment is as follows:

the annular cutting drill bit 1 is driven by the first drill rod 2 and the second drill rod 3 to drill forwards along an old pipeline 11 to be replaced, the first drill rod 2 and the second drill rod 3 rotate and simultaneously drive the driven gear 5 to rotate through the driving gear 9 of the first drill rod, so that the annular cutting drill bit 1 is driven to rotate, soil around the old pipeline 11 to be replaced is stripped by the annular milling cutter 4 at the front end of the annular cutting drill bit 1, the annular cutting drill bit is drilled into an operation pit at the other end of the old pipeline 11 to be replaced, the old pipeline 11 to be replaced is connected and fixed with the annular cutting drill bit 1, a new pipeline is connected at the same time, the drill rod is controlled to be pulled back, the old pipeline 11 to be replaced is pulled out, and the new pipeline is.

The beneficial technical effects of this embodiment are:

the embodiment provides a circular cutting pipe-drawing construction process, aiming at the technical difficulty of non-excavation pipeline replacement and maintenance, a circular cutting pipe-drawing drilling machine is utilized to cut an annular space along the outer wall of an old pipeline to be replaced, so that the old pipeline to be replaced is thoroughly stripped from peripheral soil, an annular space is formed along the outer wall of the old pipeline to be replaced, a good construction premise is created for the subsequent work of pulling away the old pipeline to be replaced and installing and laying a new pipeline, because the milled annular hole space is larger than the outer diameter of the original pipeline, the construction difficulty caused by structural damage of the old pipeline to be replaced can be avoided in the construction process, meanwhile, a new pipeline with the same specification or a pipeline with a larger specification can be re-laid in a secondary reaming mode according to the design requirement, and the defect that only the old pipeline pollutes the environment or the overflowing area of the pipeline can be reduced in the traditional pipeline updating process is thoroughly broken through, provides a new idea and a feasible scheme for updating the old pipeline to be replaced in the city.

The embodiment also provides the annular cutting tube drawing drill which is simple in structure and novel in design and realizes annular cutting drilling along the pipeline, and the annular cutting tube drawing drill adopts a double-drill-rod driving mode, so that the drilling power is improved, and the drilling stability of the drill is guaranteed; according to the invention, the cutting drill bits are arranged on the first drill rod and the second drill rod and work together with the ring cutting drill bit, so that the drilling efficiency is further improved.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.