CN110700380A

CN110700380A - Moulding drill bit is restoreed to pipeline

Info

Publication number: CN110700380A
Application number: CN201910939078.2A
Authority: CN
Inventors: 罗玉林; 王柏鸥; 邢科; 邱波
Original assignee: Chongqing Left Bank Environmental Service Ltd By Share Ltd
Current assignee: Chongqing Left Bank Environmental Service Ltd By Share Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-01-17

Abstract

The invention discloses a pipe repairing and shaping drill bit which comprises a mandrel, a guide head and an expansion device, wherein the guide head is conical and is sleeved on the mandrel; the expansion device comprises an expansion sleeve and an expansion mechanism, wherein the expansion sleeve comprises a plurality of supporting plates, and the expansion sleeve can be spliced by the supporting plates; the expanding mechanism is connected with the supporting plates and can drive the supporting plates to move along the radial direction of the expansion sleeve so as to expand or contract the expansion sleeve; the opening mechanism is arranged on the mandrel and is arranged at the tail end of the guide head. The moulding drill bit of above-mentioned pipeline restoration is through the device that expands "swell", "tumour" of pipeline inside crowded into in the soil horizon around, and local pipeline is changed fast to the high efficiency.

Description

Moulding drill bit is restoreed to pipeline

Technical Field

The invention relates to the technical field of pipeline construction, in particular to a moulding drill for pipeline repair.

Background

Underground pipelines are used for the transportation and pollution discharge of electric, hot and water systems, and are main infrastructures relied on for urban survival and development. With the rapid development of urbanization in China, the urban population is rapidly increased, various pipelines serving as urban infrastructures are also greatly increased, and the complexity is higher. Old pipelines in the underground of cities gradually weaken the functions with the increase of the ages, and even enter the accident period. Once the pipeline is in a problem, a series of chain reactions are brought, and the normal operation and safety of the city are influenced. To the change of municipal administration pipeline, generally adopt the excavation to change the pipeline. However, in the construction method of excavation replacement, when there are limited factors such as buildings, traffic, water areas, etc. on the pipeline, the construction period is long, the amount of work is large, and the construction cost is high, so that the non-excavation replacement technology of the pipeline is gradually developed.

The trenchless pipeline replacing technology includes pipe expanding method, pipe inserting method, pipeline removing method and the like. The process for replacing the pipeline by the pipe expanding method is relatively simple and is favored by application research and engineering construction units. The pipe expanding method is to expand the existing old pipe with an extrusion head, extrude the old pipe debris into the surrounding soil layer, and pull in the new pipe with equal or over diameter. The technology avoids the work of excavating, breaking and recovering the old pipelines without using values by adopting machinery or manpower, has stronger superiority when the pipelines pass through the non-excavatable buildings, water areas or special positions, and has higher cost performance. Two commonly used tube expansion methods are pneumatic impact tube expansion and static tube expansion. These trenchless pipe replacement techniques are generally only suitable for replacing a full length of pipe between two pipe work pits.

A large amount of rainwater, the used pipeline in discharge system and the oil transportation field of sewage, when using to a certain age or the load change of soil horizon around the pipeline, the soil horizon collapses and easily causes the pipeline to produce "the swell", "the tumour" to inside, to this kind of place that only needs to change the local pipeline, especially when the partial pipeline more than or equal to the pipe diameter more than 600mm is changed, all need artifical the removal "the swell", "the tumour" at present, the construction cycle is long, the engineering volume is big, construction cost is high, sometimes the soil horizon in the pipeline can continuously collapse, not only need clear up many times, still can cause the ground on this pipeline to collapse.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to solve the technical problem of eliminating bulges and tumors in the pipeline.

In order to solve the technical problem, the technical scheme adopted by the invention is as follows:

the utility model provides a moulding drill bit is restoreed to pipeline, includes the dabber, guide head and bloated device of opening, the guide head is the toper, and the cover is located on the dabber, the bloated device of opening includes:

the expansion sleeve comprises a plurality of supporting plates, and the expansion sleeve can be spliced by the supporting plates; and

the opening mechanism is arranged on the mandrel and is arranged at the tail end of the guide head, the opening mechanism is connected with the supporting plates, the opening mechanism can drive the supporting plates to move along the radial direction of the expansion sleeve, so that the expansion sleeve is opened or contracted.

Moulding drill bit is restoreed to above-mentioned pipeline, through the pulling dabber, make the guide head pass through inside "swell", "tumour" department of pipeline smoothly, and will expand the device and draw inside "swell", "tumour" department of pipeline, the expansion cover initial condition is the shrink closure, prop opening mechanism drive fagging this moment, make the expansion cover expand, the fagging with the pipeline inside "swell", "during tumour" extrudes into soil horizon around, can not make the ground on the pipeline of this department collapse, high efficiency, handle the inside "swell", "tumour" of pipeline fast.

Furthermore, the opening mechanism comprises a fixed sleeve, a movable sleeve, a plurality of telescopic assemblies and a driving piece, wherein the fixed sleeve is fixedly arranged on the mandrel; the movable sleeve is sleeved on the mandrel in a sliding manner; each supporting plate is connected with the movable sleeve and the fixed sleeve through a corresponding telescopic assembly; the driving piece is connected with the movable sleeve to drive the movable sleeve to slide along the mandrel, and further drive the telescopic assembly to do telescopic motion. The driving piece drives the movable sleeve to slide along the mandrel so as to enable the telescopic component to stretch and drive the supporting plate to move, and further the expansion sleeve is unfolded or contracted.

Furthermore, the telescopic assembly comprises two connecting rods which are equal in length and hinged in the middle; wherein, the both ends of one of them connecting rod respectively with fixed cover with the fagging is articulated, another the both ends of connecting rod respectively with the movable sleeve with the fagging is articulated, and two one of the connecting rod with the hinge of fagging is articulated for sliding. The telescopic motion of the telescopic assembly is realized by changing the angle of the included angle between the two connecting rods.

Further, moulding drill bit is restoreed to pipeline still includes the guide key, the movable sleeve with the dabber passes through guide key sliding connection. The guide key is arranged to accurately guide the movement of the movable sleeve, so that the movable sleeve is prevented from rotating relative to the mandrel during movement.

Further, the driving piece is a hydraulic cylinder, the mandrel is provided with a mounting plate, the hydraulic cylinder is mounted on the mounting plate, and a piston rod of the hydraulic cylinder is connected with the movable sleeve. The hydraulic cylinder has the advantages of simple structure, large output force, small volume, high working efficiency, stable and reliable performance, convenient use and maintenance and suitability for construction in narrow pipelines.

Furthermore, a connecting hole for connecting with a traction mechanism is formed on the mandrel along the radial direction of the mandrel. The connecting hole is adopted to connect the traction mechanism, so that the traction connection in the pipeline is simple and reliable, and the disassembly and the assembly are facilitated.

Further, the drill bit for repairing and shaping the pipeline further comprises a connecting rod assembly, the connecting rod assembly comprises a first core pipe, a second core pipe and a pin shaft, and the first core pipe, the second core pipe and the mandrel are all of hollow structures; the first core tube is detachably connected with the mandrel through the connecting hole; the first core tube is provided with a plurality of first pin holes along the radial direction at intervals, the second core tube is provided with a plurality of second pin holes along the radial direction at intervals, the second core tube is inserted into the first core tube, and the pin shafts are selectively inserted into the first pin holes and the second pin holes so as to adjust the length of the connecting rod assembly. The first core tube is inserted into the core shaft, and the first core tube is connected with the core shaft by inserting the pin shaft into the connecting hole and the first pin hole; because all seted up a plurality of pinholes on first core pipe and the second core pipe, so can adjust the length that pulls of dabber according to concrete construction situation to pull the distance when adapting to the interior construction of pipeline.

Furthermore, one end of the guide head is conical, the other end of the guide head is in smooth transition to be cylindrical, and the expansion sleeve is parallel and level to the outer surface of the cylinder of the guide head after being contracted. The smooth transition of circular cone is the cylinder and can make the guide head guide when passing earth more smoothly, and the expansion cover of shrink is parallel and level with the cylinder surface of guide head, can make the smooth no step card of transition between guide head and expansion cover hinder.

Further, moulding drill bit is restoreed to pipeline still includes the transition piece, the fagging passes through the transition piece with prop opening mechanism and connect. The fagging can follow and change from the transition piece quick detach in order to make things convenient for, because the fagging surface is extruded with contact friction such as mud stone in the use, and wearing and tearing are very fast, so the fagging needs often to be changed.

Compared with the prior art, the invention has the beneficial effects that:

1. adopt the pipeline to restore moulding drill bit, expand through the inflation cover, with the inside "swell" of pipeline, during the soil horizon around crowded income of "tumour", compare manual cleaning pipeline inside, improved work efficiency greatly, saved manpower and time.

2. The whole mechanism is simple and reliable in structure and high in applicability, and greatly promotes the technology of replacing local pipelines.

Drawings

FIG. 1 is a schematic perspective view of the expansion shells of the present invention in a contracted configuration;

FIG. 2 is a schematic perspective view of the mandrel and connecting rod assembly of the present invention;

FIG. 3 is a schematic perspective view of a guide head according to the present invention;

FIG. 4 is a schematic structural view of an expansion shell of the present invention;

FIG. 5 is a schematic perspective view of the distracting mechanism of the present invention;

FIG. 6 is a schematic structural view of the retraction assembly of the present invention;

FIG. 7 is a schematic view of the expanded structure of the expansion sleeve of the present invention;

fig. 8 is a perspective view of fig. 7 from another angle.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like, which indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referenced components or structures must have a specific orientation, be constructed in a specific orientation, and be operated, and thus are not to be construed as limiting the present invention.

Referring to fig. 1, the pipe repairing and shaping drill provided in this embodiment includes: mandrel 1, guide head 2 and expanding device 3. The guide head 2 and the expanding device 3 are arranged on the mandrel 1 in sequence.

Referring to fig. 2, the mandrel 1 may be a solid or hollow structure, and the mandrel 1 may be circular, square, oval, polygonal, etc. In this embodiment, the mandrel 1 is a circular hollow structure, and a connecting hole 11 is formed in the mandrel 1 along the radial direction thereof, and the connecting hole 11 is used for connecting a traction device. In order to facilitate the traction in the construction process in the pipeline, the pipeline plastic drill bit can be further provided with a connecting rod assembly 4 which comprises a first core pipe 41, a second core pipe 42 and a pin shaft 43, wherein the first core pipe 41 and the second core pipe 42 are of circular hollow structures consistent with the core shaft 1; the first core tube 41 is provided with a plurality of first pin holes 44 at intervals along the radial direction thereof, and the second core tube 42 is provided with a plurality of second pin holes 45 at intervals along the radial direction thereof; the first core tube 41 is inserted into the core shaft 1, the first core tube 41 is connected with the core shaft 1 by inserting the pin shaft 43 into the connecting hole 11 and the first pin hole 44, and the disassembly is very convenient; the second core tube 42 is inserted into the first core tube 41, and the pin shaft 43 is selectively inserted into the first pin hole 44 and the second pin hole 45 to adjust the length of the connecting rod assembly 4, thereby flexibly lengthening the traction length in front of the core tube 1 to adapt to the traction distance in construction in a pipeline.

Referring to fig. 3, the guiding head 2 is conical and is sleeved on the mandrel 1. One end of the guide head 2 can be a cone or a polygonal pyramid, and the other end is correspondingly smoothly transited into a cylinder or a polygonal column. In this embodiment, one end of the guiding head 2 is a cone, and the other end is a cylinder in corresponding smooth transition, so that when a bulge or a tumor is in the pipeline, the guiding can be smoothly performed by the conical surface of the guiding head 2. Specifically, the guide head 2 is of a shell structure, and the cylindrical section is short, so that the weight of the equipment can be greatly reduced by the shell structure under the condition that the bearing capacity meets the requirement.

Referring to fig. 4 and 5, the expanding device 3 includes an expansion sleeve 31 and an expanding mechanism 32, the expansion sleeve 31 includes a plurality of supporting plates 311, and the plurality of supporting plates 311 can splice the expansion sleeve 31. The supporting plates 311 are cylinders and are evenly cut into a plurality of arc discrete blocks along the axial direction, and the annular expansion sleeve 31 can be spliced by the arc supporting plates 311. Or the supporting plates are square, and the polygonal expansion sleeves can be spliced by a plurality of square supporting plates. In this embodiment, the supporting plate 311 is arc-shaped, and the expansion sleeve 31 formed by splicing a plurality of arc-shaped supporting plates 311 is flush with the outer surface of the cylinder of the guide head 2 after being contracted. Can also set up transition piece 312 on every fagging 311, fagging 311 is connected with distraction mechanism 32 through transition piece 312, and transition piece 312 is connected with the interior arc surface of fagging 311 with the screw, and fagging 311 can be followed transition piece 312 and dismantled fast in order to make things convenient for the change of fagging 311, owing to fagging 311 surface and contact friction extrusion such as mud stone in the use, and wearing and tearing are very fast, so fagging 311 needs often to be changed.

Referring to fig. 1 and 5, the expanding mechanism 32 is disposed on the mandrel 1 and at the tail end of the guiding head 2, the expanding mechanism 32 is connected to a plurality of supporting plates 311, and the expanding mechanism 32 can drive the supporting plates 311 to move along the radial direction of the expansion sleeve 31, so as to expand or contract the expansion sleeve 31.

In one embodiment, the expanding mechanism 32 includes a fixed sleeve 321, a movable sleeve 322, a plurality of telescopic assemblies 323 and a driving member 324, wherein the fixed sleeve 321 is fixedly disposed on the mandrel 1; the movable sleeve 322 is sleeved on the mandrel 1 in a sliding manner; the transition block 312 on each supporting plate 311 is connected with the movable sleeve 322 and the fixed sleeve 321 through a corresponding telescopic component 323; the driving member 324 is connected to the movable sleeve 322 to drive the movable sleeve 322 to slide along the mandrel 1, thereby driving the telescopic assembly 323 to perform telescopic motion.

Specifically, because the movable sleeve 322 moves along the mandrel 1, in order to prevent the movable sleeve 322 from rotating relative to the mandrel 1 in the moving process, the drill for repairing and shaping the pipeline may further include a guide key 326, three key slots are uniformly formed in the circumferential direction of the inner surface of the movable sleeve 322, the three guide keys 326 are fixedly arranged on the mandrel 1 along the axial direction of the mandrel 1, the key slots of the movable sleeve 322 are in one-to-one corresponding fit with the guide keys 326, and the movable sleeve 322 can slide along the guide keys 326. Three guide keys 326 are circumferentially arranged to precisely guide the movement of the movable sleeve 322, so that the movement of the movable sleeve 322 is more stable.

Referring to fig. 6, the telescopic assembly 323 includes two connecting rods with equal length and hinged at the middle; two ends of one connecting rod are respectively hinged with the fixed sleeve 321 and the transition block 312 on the supporting plate 311, two ends of the other connecting rod are respectively hinged with the movable sleeve 322 and the transition block 312 on the supporting plate 311, and one of the two connecting rods is hinged with the transition block 312 in a sliding manner. Specifically, the movable sleeve 322 and the fixed sleeve 321 are provided with six groups of telescopic components which are uniformly distributed in the circumferential direction. Six first hinge holes 3a are uniformly arranged at intervals in the circumferential direction of the fixing sleeve 321, and the center line of each first hinge hole 3a is along the circumferential tangential direction of the fixing sleeve 321. Six second hinge holes 3b are uniformly arranged at intervals in the circumferential direction of the movable sleeve 322, and each second hinge hole 3b and the corresponding first hinge hole 3a are located on the same bus. Two connecting rods of the telescopic component 323 are a first connecting rod 323a and a second connecting rod 323b respectively, the lengths of the two connecting rods are equal, the two connecting rods are hinged at the middle point, each transition block 312 is provided with a third hinge hole 3c and a fourth hinge hole 3d, the fourth hinge hole is a waist-shaped hole parallel to a bus of the supporting plate 311, a hinge shaft positioned in the fourth hinge hole 3d can slide in the waist-shaped hole, two ends of the first connecting rod 323a are hinged with the first hinge hole 3a and the fourth hinge hole 3d respectively, and two ends of the second connecting rod 323b are hinged with the second hinge hole 3b and the third hinge hole 3c respectively.

Of course, the telescopic assembly 323 may also include two connecting rods with equal length, the two connecting rods are hinged end to end, and the hinged point is hinged to the transition block 312 of the supporting plate 311, and the other end of the two connecting rods is hinged to the fixed sleeve 321 and the movable sleeve 322, respectively, so that the included angle between the two connecting rods is changed by driving the movable sleeve 322 to slide along the core shaft 1, thereby generating the telescopic action.

Referring to fig. 5, the driving member 324 is connected to the movable sleeve 322, the mandrel 1 is provided with the mounting plate 325, the driving member 324 is mounted on the mounting plate 325 and is used for driving the movable sleeve 322 to slide along the mandrel 1, and at least two driving members 324 are uniformly arranged in the circumferential direction of the mandrel 1, so that the stable and flexible movement of the distraction mechanism 32 can be ensured, and the blocking, abnormal sound and the like caused by the nonuniform stress on the distraction mechanism 32 can be avoided. The driving member 324 may be a hydraulic cylinder, an air cylinder, an electric push rod, or a mechanical drive, as long as the movable sleeve 322 can slide along the mandrel 1. In this embodiment, two driving members 324 are symmetrically disposed with respect to the mandrel 1; the driving part 324 adopts a hydraulic cylinder, the hydraulic cylinder has simple structure, large output force, small volume, high working efficiency, stable and reliable performance and convenient use and maintenance, and is very suitable for construction in narrow pipelines. To facilitate disassembly and maintenance of the hydraulic cylinders, two hydraulic cylinders are symmetrically mounted on the side of the mounting plate 325 facing away from the guide head 2.

In this embodiment, when the hydraulic cylinder drives the movable sleeve 322 to move back and forth along the mandrel 1, the included angle between the first connecting rod 323a and the second connecting rod 323b and the axis of the mandrel 1 is changed, the hinge shaft in the fourth hinge hole 3d slides in the kidney-shaped hole, and the expansion sleeve 31 formed by the plurality of supporting plates 311 is expanded or contracted.

It is understood that in other embodiments, the expanding mechanism 32 may be a plurality of hydraulic cylinders, the cylinders of the hydraulic cylinders are disposed on the mandrel 1, the piston rods of the hydraulic cylinders are connected to the supporting plates 311, and the expansion sleeves 31 formed by the supporting plates 311 are expanded or contracted by the synchronous actions of the plurality of hydraulic cylinders;

the opening mechanism 32 can also be a plurality of linear motors, the linear motors are arranged on the mandrel 1, the output shafts of the linear motors are connected with the supporting plates 311, and the expansion sleeves 31 formed by the supporting plates 311 are opened or contracted through synchronous actions of the linear motors;

the opening mechanism 32 can also be a plurality of wedges, the wedges are slidably arranged on the mandrel 1, the inclined surfaces of the wedges are in sliding fit with the supporting plates 311, and the plurality of wedges are synchronously pushed to slide along the mandrel 1 so that the expansion sleeves 31 formed by the plurality of supporting plates 311 are opened or contracted;

the opening mechanism 32 may also be a plurality of parallelogram link mechanisms, each parallelogram link mechanism includes at least two links with equal length and arranged in parallel, two ends of each link are hinged with the supporting plates 311 and the mandrel 1 respectively, and the angle between the link and the mandrel 1 is changed by synchronously driving the plurality of parallelogram link mechanisms, so that the expansion sleeves 31 formed by the plurality of supporting plates 311 are opened or contracted.

Referring to fig. 1 to 8, the working process of the pipe repairing and shaping drill includes:

the expansion sleeve 31 is in a contracted closed state at first, after the first core tube 41, the second core tube 42 and the mandrel 11 are connected by the pin shaft 43, the second core tube 42 is pulled, the conical surface of the guide head 2 of the traction mechanism is forced to pass through the bulge and tumor positions in the pipeline, the expansion device 3 is pulled to the bulge and tumor positions in the pipeline, at the moment, the two hydraulic cylinders synchronously drive the movable sleeve 322 to move to the extending limit position of the hydraulic cylinders along the guide key 326, so that the acute angle included angle between the first connecting rod 323a and the second connecting rod 323b and the axis of the mandrel 1 is maximized, at the moment, the expansion sleeve 31 is expanded to the maximum outer diameter, and the bulge and the tumor in the pipeline are extruded into the surrounding soil layer. After the construction is finished, the two hydraulic cylinders synchronously release pressure, the movable sleeve 322 is driven to move along the guide key 326 to the retraction limit position of the hydraulic cylinders, and the supporting plate 311 moves along the radial direction of the expansion sleeve 31, so that the expansion sleeve 31 is retracted and folded.

The moulding drill bit for repairing the pipeline realizes efficient and rapid treatment of bulges and tumors in the pipeline, so that local pipelines can be rapidly replaced, and compared with manual removal of bulges and tumors in the pipeline, the moulding drill bit saves labor and time, improves working efficiency, and removes unsafe factors caused by manual labor; the moulding drill bit of above-mentioned pipeline restoration its structure itself is simple reliable, and the construction is high-efficient simple and safe, and the suitability is extremely wide.

It should be noted that the above preferred embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.

Claims

1. The utility model provides a moulding drill bit is restoreed to pipeline, its characterized in that, includes dabber, guide head and the device that expands, the guide head is the toper, and the cover is located the spindle is last, the device that expands includes:

2. The pipe repair shaping drill of claim 1, wherein the distraction mechanism comprises a fixed sleeve, a movable sleeve, a plurality of telescoping assemblies, and a driving member, the fixed sleeve being fixedly disposed on the mandrel; the movable sleeve is sleeved on the mandrel in a sliding manner; each supporting plate is connected with the movable sleeve and the fixed sleeve through a corresponding telescopic assembly; the driving piece is connected with the movable sleeve to drive the movable sleeve to slide along the mandrel, and further drive the telescopic assembly to do telescopic motion.

3. The pipe repair shaping drill of claim 2, wherein the telescoping assembly comprises two equal length and middle hinged links; wherein, the both ends of one of them connecting rod respectively with fixed cover with the fagging is articulated, another the both ends of connecting rod respectively with the movable sleeve with the fagging is articulated, and two one of the connecting rod with the hinge of fagging is articulated for sliding.

4. The pipe repair shaping drill of claim 2, further comprising a guide key through which the moveable sleeve is slidably connected to the mandrel.

5. The pipe repair shaping drill of claim 2, wherein the driving member is a hydraulic cylinder, the mandrel has a mounting plate, the hydraulic cylinder is mounted on the mounting plate, and a piston rod of the hydraulic cylinder is connected to the movable sleeve.

6. The pipe repair shaping drill bit of claim 1, wherein the mandrel is provided with a connection hole along a radial direction thereof for connecting with a traction mechanism.

7. The pipe repair molding drill bit of claim 6, further comprising a connecting rod assembly, wherein the connecting rod assembly comprises a first core tube, a second core tube and a pin, and the first core tube, the second core tube and the mandrel are all hollow structures; the first core tube is detachably connected with the mandrel through the connecting hole; the first core tube is provided with a plurality of first pin holes along the radial direction at intervals, the second core tube is provided with a plurality of second pin holes along the radial direction at intervals, the second core tube is inserted into the first core tube, and the pin shafts are selectively inserted into the first pin holes and the second pin holes so as to adjust the length of the connecting rod assembly.

8. The pipe repair shaping drill bit of claim 1, wherein one end of the guide head is conical, the other end of the guide head is smoothly transited to be cylindrical, and the expansion sleeve is flush with the outer cylindrical surface of the guide head after being contracted.

9. The pipe repair shaping drill of claim 1, further comprising a transition block through which the bracing plate is connected with the distraction mechanism.