CN116411810B - Reamer and non-excavation pipeline laying method - Google Patents
Reamer and non-excavation pipeline laying methodInfo
- Publication number
- CN116411810B CN116411810B CN202310405391.4A CN202310405391A CN116411810B CN 116411810 B CN116411810 B CN 116411810B CN 202310405391 A CN202310405391 A CN 202310405391A CN 116411810 B CN116411810 B CN 116411810B
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- cutting
- tube
- reaming
- reamer
- guide
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
本申请涉及一种扩孔器及非开挖管道铺设方法，其包括压平管，压平管的两端均固定安装有扩孔管，扩孔管远离压平管的一端安装有连接管，扩孔管的内直径和外直径均由靠近压平管的一端至另一端组件减小呈锥形，扩孔管由远离压平管的一端至另一端依次包括第一切削扩孔部、第二切削扩孔部和压平扩孔部，第一切削扩孔部和第二切削扩孔部均开设有多个喷射孔，第一切削扩孔部的外壁固定安装有多根第一切削杆，第二切削扩孔部开设有多个伸缩孔，每一伸缩孔内部均伸缩设置有第二切削杆，第二切削杆与第二切削扩孔部之间安装有驱动组件。本申请具有降低导向孔内部塌陷的情况出现的效果。
The present application relates to a reamer and a trenchless pipe laying method, which includes a flattening tube, with reaming tubes fixedly mounted at both ends of the flattening tube, a connecting tube mounted at the end of the reaming tube away from the flattening tube, the inner and outer diameters of the reaming tube decreasing in a tapered manner from the end closest to the flattening tube to the other end, the reaming tube sequentially including a first cutting reaming portion, a second cutting reaming portion, and a flattening reaming portion from the end away from the flattening tube to the other end, the first cutting reaming portion and the second cutting reaming portion both having a plurality of injection holes, a plurality of first cutting rods fixedly mounted on the outer wall of the first cutting reaming portion, a plurality of telescopic holes mounted on the second cutting reaming portion, a second cutting rod being telescopically mounted inside each telescopic hole, and a drive assembly being mounted between the second cutting rod and the second cutting reaming portion. The present application has the effect of reducing the occurrence of internal collapse of the guide hole.
Description
Technical Field
The application relates to the field of pipeline construction, in particular to a reamer and a non-excavation pipeline laying method.
Background
When laying a pipeline, the pipeline may pass through a river channel or a road, etc., and in order not to damage the river channel or the road, a trenchless pipeline laying method is generally used for construction. The non-excavation pipeline laying method is generally that a drill drives a drill bit to move underground along a pipeline laying path through a drill rod to form a guide hole. When the drill drives the drill bit to move through the drill rod, the drill bit can also rotate, so that a guide hole is conveniently formed underground. After the pilot hole is formed, the drill bit is replaced with a reamer. And then the drilling machine drives the reamer to move in the guide hole through the drill rod. The diameter of the reamer is larger than that of the drill bit, so that the reamer digs out soil on the inner wall of the guide hole after moving in the guide hole, thereby increasing the diameter of the guide hole.
Currently, the related art discloses a reamer including a flattened tube and a hole-enlarging tube fixedly installed at both ends of the flattened tube. The outer wall of the hole expanding pipe is fixedly provided with a plurality of cutting rods, and the hole expanding pipe is also provided with a plurality of injection holes. The inner diameter and the outer diameter of the hole expanding pipe are reduced and arranged in a conical shape from one end close to the flattening pipe to the other end. And a connecting pipe is fixedly arranged at one end of the hole expanding pipe, which is far away from the flattening pipe. One connecting pipe is used for being connected with the drill rod, and the other connecting pipe is used for being connected with the pipeline. When reaming is carried out, the drilling machine drives the reamer to move through the drill rod, and meanwhile, the drilling machine drives the reamer to rotate through the drill rod. When the reamer moves and rotates in the guide hole, the cutting rod digs out soil on the inner wall of the guide hole, and meanwhile mud is sprayed out from the spraying hole to wash, so that the guide hole is enlarged to a diameter sufficient for placing a pipeline. When using the reamer to ream the pilot hole, generally, a plurality of reamers with different diameters are used to gradually enlarge the pilot hole, thereby reducing the occurrence of collapse in the pilot hole. While the diameter difference between each reamer is related to the hardness of the soil, the harder the soil, the larger the diameter difference between each reamer, and the fewer number of reamers required. The softer the soil, the smaller the diameter difference between each reamer and the greater the number of reamers required.
With respect to the related art described above, the inventors believe that the number of reamers is generally determined based on the overall hardness of the soil in the path of the pipe lay. In a typical pipe laying path, the softness of the soil varies, and there may be some soft and some hard. If the hard portion of the pipe is large in the road, the number of reamers is prepared according to the hard portion of the pipe. Then, when the reamer reams a portion where the pilot hole is in soft soil, the pilot hole may collapse.
Disclosure of Invention
In order to reduce the occurrence of collapse in the guide hole, the application provides a reamer and a non-excavation pipeline laying method.
The application provides a reamer and a non-excavation pipeline laying method, which adopts the following technical scheme:
The utility model provides a reamer, includes the pressure flat tube, the equal fixed mounting in both ends of pressure flat tube has the reaming pipe, the reaming pipe is kept away from the one end of pressure flat tube and is installed the connecting pipe, one of them the one end that the reaming pipe was kept away from to the connecting pipe is used for being connected with the drilling rod, another the one end that the reaming pipe was kept away from to the connecting pipe is used for being connected with the pipe, the inside diameter and the outside diameter of reaming pipe are reduced to be the toper by the one end to the other end subassembly that is close to pressure flat tube, the reaming pipe includes first cutting reamer, second cutting reamer and flattening reamer in proper order by the one end that is kept away from pressure flat tube, a plurality of jet orifices have all been seted up to first cutting reamer and second cutting reamer, a plurality of telescopic holes have been seted up to second cutting reamer, each telescopic hole is inside all to be provided with the second cutting reamer, install drive assembly between second cutting reamer and the second cutting reamer, drive assembly is used for driving the second cutting reamer.
Through adopting above-mentioned technical scheme, the rig passes through the drilling rod and drives reamer at inside removal and the rotation of guiding hole, when meetting the soft part of soil property, according to the soft degree of soil property, drive assembly drives inside the second cutting pole part withdrawal reaming pipe to reduce the reaming size of second cutting reamer to the guiding hole. Then the soft soil part is extruded and reamed through the flattening reamer part, so that the occurrence of collapse of the reamer when the guiding hole is located at the soft soil part is reduced.
When encountering the hard part of the soil, the driving assembly drives the second cutting rod part to extend out according to the hardness of the soil, so that the reaming size of the second cutting reaming part for the guide hole is increased. Then the soft soil part is extruded and reamed through the flattening reamer part, so that the situation that the flattening reamer part cannot flatten because of hard soil needing flattening is reduced.
In the process that the drilling machine drives the reamer to move and rotate in the guide hole through the drill rod, the drilling machine ejects slurry from the injection holes on the two hole expanding pipes, and the inner wall of the guide hole is protected by the slurry ejected from the injection holes, so that the occurrence of the condition that the inside of the guide hole collapses is reduced. The direction of spraying through the spraying holes on the two hole expanding pipes is opposite, so that the condition that the thrust generated by spraying mud from the spraying holes hinders the movement of the reamer is reduced.
Optionally, the drive assembly includes stand pipe, guide block and spring, stand pipe fixed mounting is in the inner wall of second cutting reamer part, guide block and spring all are located the inside of stand pipe, the spring is located between the inner wall of guide block and second cutting reamer part, the spring is used for driving the guide block and keeps away from the inner wall of second cutting reamer part, the one end and the guide block of the inside of second cutting reamer part of second cutting pole orientation, the second cutting pole is located to the spring cover.
By adopting the technical scheme, when the reamer encounters a soft part of the soil, the power for pumping mud to the reamer is reduced, so that the pressure inside the reamer is reduced. After the pressure in the reamer is reduced, the spring is restored to drive the guide block to be far away from the inner wall of the second cutting reamer part, and the guide block drives the second cutting rod to be partially retracted into the second cutting reamer part, so that the length of the second cutting rod extending out of the telescopic hole is reduced conveniently. When the reamer encounters hard earth portions, the power to pump mud to the reamer is increased, thereby increasing the pressure inside the reamer. After the pressure in the reamer is increased, the guide block is extruded and then moves towards the inner wall of the second cutting reamer part, and the guide block drives the second cutting rod part to extend out of the second cutting reamer part, so that the length of the second cutting rod extending out of the telescopic hole is increased conveniently.
Optionally, the guide block is provided with a plurality of first sealing rings, the guide block is located to first sealing ring cover, the draw-in groove is got into to the week lateral wall of guide block has been seted up and has been supplied first sealing ring, first sealing ring sets up along the length direction interval of stand pipe.
Through adopting above-mentioned technical scheme, first sealing ring is used for shutoff guide block's week lateral wall and the gap between the inside wall of guide cylinder to reduce the condition that mud got into and appear.
Optionally, the second cutting rod is close to the fixed block that has of one end of guide block, the one end that the guide block is close to the second cutting rod has offered the slot that supplies the block to peg graft, the interior bottom wall fixed mounting of slot has the magnetic path, the magnetic path is used for attracting the block.
Through adopting above-mentioned technical scheme, when second cutting rod wearing and tearing need be changed, pull out the second cutting rod, let the inserts remove from the slot to make second cutting rod and guide block separation. After a new second cutting rod is inserted from the telescopic hole, the insert block is inserted into the slot, and then the insert block is attracted through the magnetic block, so that the second cutting rod is convenient to install and replace.
Optionally, the guide block is provided with the adjusting column piece, the adjusting groove that supplies adjusting column piece screw thread to wear to establish is offered to one side that the guide block is close to the second cutting pole, the slot is located the middle part of the interior bottom wall of adjusting groove, the shaft fixed mounting of second cutting pole has the slider, the through-hole that supplies the second cutting pole to wear to establish is offered to the adjusting column piece, the spout that supplies the slider to slide is all offered to the inside wall of slot and the inner wall of through-hole, leave the clearance that supplies the slider to get into between the interior bottom wall of adjusting column piece and adjusting groove, the spring is located between the inner wall of adjusting column piece and second cutting reaming portion.
By adopting the technical scheme, the second cutting rod is pulled, so that the sliding block enters the gap between the adjusting column block and the inner bottom wall of the adjusting groove, and the sliding block enters the gap. And then rotating the second cutting rod to align the sliding block with the sliding groove positioned on the inner wall of the through hole. And then the second cutting rod is pulled to enable the sliding block to enter the sliding groove. After the sliding port enters the inside of the sliding groove, the second cutting rod is rotated, and the sliding block is clamped with the sliding groove, so that the adjusting column block is rotated. After the adjusting column block rotates, the adjusting column block can move along the depth direction of the adjusting groove, so that the distance between the adjusting column block and the inner wall of the second cutting reaming part is changed, and the elasticity of the spring when mud does not squeeze the guide block is adjusted. The elasticity of the spring when the slurry does not squeeze the guide block is adjustable, so that the reamer is convenient to be used in pipeline laying in soils with different hardness.
Optionally, the inside fixed mounting of stand pipe has first spacing frame, the second spacing frame is installed to the one end that the stand pipe kept away from second cutting reamer, the guide block is located between first spacing frame and the second spacing frame, first spacing frame and the second spacing frame are used for restricting the sliding distance of guide block in the stand pipe inside.
Through adopting above-mentioned technical scheme, when mud did not send into the reamer, the second spacing frame was used for sheltering from the guide block to reduce the condition that the guide block slipped out from the stand pipe to appear. When the pressure of the slurry pumped into the reamer is increased to a certain degree, the guide block abuts against the first limiting frame, so that the situation that the spring is damaged under the extrusion of the guide block is reduced.
Optionally, the one end fixed mounting that the reaming pipe is close to the flattening pipe has the grafting ring, the internal diameter of grafting ring equals the one end internal diameter that the reaming pipe is close to the flattening pipe, the external diameter of grafting ring is less than the one end external diameter that the reaming pipe is close to the flattening pipe, the thread groove that supplies grafting ring screw thread to wear to establish has been seted up to the inner wall that the flattening pipe is close to reaming pipe one end.
Through adopting above-mentioned technical scheme, when the reamer needs the clearance, rotate the reaming pipe to make the grafting ring pull out from the screw groove, thereby conveniently clear up the reamer.
Optionally, the second limiting frame is fixedly provided with a sleeve, and the sleeve is sleeved at one end of the guide tube far away from the second cutting reamer part through threads.
Through adopting above-mentioned technical scheme, rotate the sleeve when the clearance reamer, the sleeve drives the spacing frame of second and takes off from the guide cylinder to conveniently take out spring and guide block and clear up or change.
A non-excavation pipeline laying method includes such steps as on-site surveying to determine the position of pipeline to be laid, excavating working wells at two ends of the position where pipeline is to be laid, conveying drilling machine to a working well, arranging drilling rod on the drilling machine, installing drill bit at one end of drilling rod, injecting mud into drilling rod, drilling the drilling rod from the inner side wall of one working well, removing drilling bit from the inner side wall of another working well, preparing multiple reamers with different diameters, installing the reamers on drilling rod, moving and rotating the reamers on the guide hole, and after the diameter of guide hole is increased to be greater than that of pipeline to be laid, installing pipeline to be laid on one side of the reamer far from drilling rod, pulling drilling rod.
Through adopting above-mentioned technical scheme, dig out the guiding hole at the drill bit, when reaming the guiding hole in addition to the reamer, all have the mud blowout, strengthen the inner wall of guiding hole through the mud to the condition that the guiding hole collapses appears is reduced.
The drilling machine drives the reamers to move and rotate in the guide holes to ream, and the method comprises the following steps that when the soil is softened, the driving assembly drives the second cutting rod part to retract into the hole-enlarging pipe, when the soil is hardened, the driving assembly drives the second cutting rod part to extend out of the hole-enlarging pipe, and each reamer is sequentially replaced according to the diameter from large to small to ream.
Through adopting above-mentioned technical scheme, according to the soft degree of soil property, stretch out the length of hole expanding pipe through drive assembly adjustment second cutting rod to conveniently let the reaming portion that flattens extrude the reaming to the soft part of soil property, and then reduce the condition that the pilot hole inside collapses and appear.
In summary, the present application includes at least one of the following beneficial technical effects:
1. The driving assembly drives the second cutting rod part to retract into the second cutting reaming part when the soil is soft, so that the flattening reaming part can conveniently squeeze and ream the soil on the inner wall of the guide hole, and the occurrence of collapse in the guide hole is reduced;
2. the position of the guide block in the guide cylinder is changed by changing the pressure of slurry in the reamer, so that the second cutting rod is conveniently driven to stretch out and draw back;
3. the adjusting column block is rotated to extend or retract the adjusting groove, so that the elasticity of the spring in the reamer without mud extrusion is changed, and the reamer is convenient to be applied to reaming in soil with different hardness.
Drawings
FIG. 1 is a schematic view of the overall construction of an underreamer of an embodiment of the present application without mud inside;
FIG. 2 is a cross-sectional view at A-A of FIG. 1;
fig. 3 is an enlarged view of fig. 2 at a;
FIG. 4 is an exploded view of a flattened and reamed tube in accordance with an embodiment of the present application;
fig. 5 is an enlarged view of fig. 2 at B;
FIG. 6 is an exploded view of an embodiment of the present application between a second cutting bar and a drive assembly;
FIG. 7 is an exploded view of the guide block and first seal ring of an embodiment of the present application;
FIG. 8 is a schematic illustration of the present application using a drilling rig to drill pilot holes;
FIG. 9 is a schematic illustration of reaming a pilot hole with a first reamer in accordance with an embodiment of the present application;
FIG. 10 is a schematic illustration of reaming a pilot hole with a secondary reamer in accordance with an embodiment of the present application
FIG. 11 is a schematic illustration of an embodiment of the present application pulling a pipe into the interior of a pilot hole.
The reference numerals are 1, flattening pipe, 2, connecting pipe, 3, inserting ring, 4, thread groove, 5, first sealing ring, 6, second sealing ring, 7, reaming pipe, 71, first cutting reaming part, 72, second cutting reaming part, 73, flattening reaming part, 8, first cutting rod, 9, second cutting rod, 10, jet hole, 11, telescopic hole, 12, driving component, 121, guiding pipe, 122, guiding block, 123, spring, 13, adjusting groove, 14, inserting groove, 15, magnetic block, 16, inserting block, 17, adjusting column block, 18, drill bit, 19, through hole, 20, sliding block, 21, sliding groove, 22, clamping groove, 23, first limiting frame, 24, second limiting frame, 25, sleeve, 26, drilling machine, 27, pipeline, 28, drilling rod, 29 and guiding hole.
Detailed Description
The application is described in further detail below with reference to fig. 1-11.
The embodiment of the application discloses a reamer and a non-excavation pipeline 27 laying method.
Referring to fig. 1 and 2, a reamer includes a flattening tube 1, and when the flattening tube 1 rotates and moves inside a guide hole 29, the outer wall of the flattening tube 1 is kept flat, thereby facilitating flattening of the inner wall of the guide hole 29.
Referring to fig. 3 and 4, reaming pipes 7 are arranged at two ends of the flattening pipe 1, and an inserting ring 3 is fixedly arranged at one end, close to the flattening pipe 1, of the reaming pipe 7. The inner diameter of the plugging ring 3 is equal to the inner diameter of one end of the reaming pipe 7 close to the flattening pipe 1, and the outer diameter of the plugging ring 3 is smaller than the outer diameter of one end of the reaming pipe 7 close to the flattening pipe 1. The inner wall of the flattening tube 1, which is close to one end of the hole expanding tube 7, is provided with a thread groove 4 for the insertion ring 3 to pass through. The hole expanding tube 7 is matched with the plugging ring 3 for installation through the thread groove 4. When the reamer needs to be cleaned, the reamer tube 7 is unscrewed from the flattened tube 1, thereby facilitating cleaning of the reamer.
The second sealing ring 6 is fixedly arranged on one side, away from the hole expanding tube 7, of the plugging ring 3, and after the plugging ring 3 is screwed into the thread groove 4, the second sealing ring 6 seals a gap between the plugging ring 3 and the inner wall of the thread groove 4, so that the condition of slurry leakage is reduced.
Referring to fig. 1, a connecting pipe 2 is installed at one end of the reaming pipe 7 away from the flattened pipe 1, one connecting pipe 2 is used for connecting with a drill pipe 28 at one end of the reaming pipe 7, and the other connecting pipe 2 is used for connecting with a pipe 27 at one end of the reaming pipe 7.
Referring to fig. 1, the inner diameter and the outer diameter of the reaming pipe 7 each gradually increase from one end away from the flattened pipe 1 to the other end, and the reaming pipe 7 includes a first cutting reamer 71, a second cutting reamer 72, and a flattening reamer 73 in this order from one end away from the flattened pipe 1 to the other end.
Referring to fig. 1, the first and second cutting reamers 71 and 72 are each provided with a plurality of injection holes 10. The mud inside the reamer is sprayed from the spraying holes 10, and passes through the inner wall of the guide hole 29, thereby reducing the occurrence of collapse inside the guide hole 29. The jet holes 10 at the same time located in the two reamer pipes 7 are jetted in opposite directions, thereby reducing the occurrence of the situation that the jetted mud hinders the reamer from moving inside the guide holes 29.
Referring to fig. 1 and 4, a plurality of first cutting stems 8 are fixedly mounted to the first cutting reamer part 71, and a plurality of second cutting stems 9 are provided to the second cutting reamer part 72. The second cutting reamer part 72 is provided with a telescopic hole 11 through which the second cutting stem 9 is telescopic. The reamer moves and rotates inside the guide hole 29, and the first cutting stem 8 and the second cutting stem 9 dig the earth inside the guide hole 29, thereby facilitating the expansion of the diameter of the guide hole 29. After the first cutting bar 8 and the second cutting bar 9 dig the soil of the inner wall of the guide hole 29, the flattening reamer 73 presses the inner wall of the guide hole 29 to ream, so that the hardness of the soil of the inner wall of the guide hole 29 is increased, and the occurrence of collapse of the guide hole 29 is reduced.
Referring to fig. 5, the second cutting bar 9 is provided with a driving assembly 12, and the driving assembly 12 includes a guide tube 121, a guide block 122, and a spring 123. The guide tube 121 is fixedly mounted on the inner wall of the second cutting reamer part 72, and the guide block 122 is slidably disposed inside the guide tube 121. The spring 123 is located between the guide block 122 and the inner wall of the second cutting reamer 72.
Referring to fig. 6 and 7, an adjustment groove 13 is formed in a side of the guide block 122 adjacent to the inner wall of the second cutting reamer part 72, and a slot 14 is formed in a middle portion of a groove bottom of the adjustment groove 13. The bottom of the slot 14 is fixedly provided with a magnetic block 15, one end of the second cutting rod 9 is fixedly provided with an insert block 16, the insert block 16 is inserted into the slot 14, and the magnetic block 15 attracts the insert block 16.
When the second cutting rod 9 is worn and needs to be replaced, the second cutting rod 9 is directly pulled, so that the insert block 16 is pulled out of the slot 14, and the second cutting rod 9 is convenient to replace. When a new second cutting rod 9 needs to be installed, the insert 16 is inserted into the slot 14 after passing the second cutting rod 9 through the telescopic hole 11. The insert 16 is attracted by the magnet 15, thereby facilitating the installation of the second cutting rod 9.
Referring to fig. 6 and 7, the guide block 122 is provided with an adjustment post block 17, and the adjustment post block 17 is threaded through the adjustment groove 13. The spring 123 is located between the adjustment post 17 and the inner wall of the second cutting reamer 72. The spring 123 is sleeved on the second cutting rod 9, and the adjusting column block 17 is provided with a through hole 19 for the second cutting rod 9 to penetrate. The bearing wall of the insert block 16 is fixedly provided with a sliding block 20, and the inner side wall of the slot 14 and the inner wall of the through hole 19 are respectively provided with a sliding groove 21 for sliding the sliding block 20. When the insert 16 enters the slot 14, the sliding block 20 is clamped with the sliding groove 21 positioned on the inner side wall of the slot 14, so that the condition that the second cutting rod 9 rotates is reduced. The spring 123 keeps pushing the adjustment post 17 away from the inner wall of the second cutting reamer 72.
When it is desired to lay the pipeline 27, the pumping power of the initial slurry is set according to the overall soil hardness in the path of the laid pipeline 27. The drill 26 then pumps the slurry into the reamer through the drill stem 28, the slurry compressing the guide block 122, thereby moving the guide block 122 toward the inner wall of the second cutting reamer portion 72, the guide block 122 driving the adjustment post 17 to compress the spring 123.
As the reamer moves from a hard to a soft portion of the earth, the pumping power of the mud is reduced, thereby reducing the mud pressure inside the reamer. The mud pressure inside the reamer is reduced and the spring 123 is restored so that the guide block 122 is moved away from the inner wall of the second cutting reamer part 72 and the retracted portion of the second cutting stem 9 is brought into the interior of the second cutting reamer part 72, thereby reducing the length of the second cutting stem 9 extending out of the telescopic hole 11. The length of the second cutting rod 9 extending out of the extension hole 11 is reduced, thereby reducing the size of the second cutting reamer part 72 reaming the guide hole 29, and further increasing the size of the flattening reamer part 73 performing the extrusion reaming of the guide hole 29. The size of the pilot hole 29 is increased by the flattening reamer part 73, so that the occurrence of collapse of the inside of the pilot hole 29 is reduced.
When the reamer moves from a soft to a hard portion, the pumping power of the mud is increased, thereby increasing the mud pressure inside the reamer. The slurry pressure inside the reamer increases and the guide block 122 continues to move toward the inner wall of the second cutting reamer part 72, the spring 123 is further compressed by the adjustment post block 17, and the extension portion of the second cutting stem 9 is extended to the outside of the second cutting reamer part 72, thereby increasing the length of the extension hole 11 of the second cutting stem 9. The length of the second cutting rod 9 extending out of the extension hole 11 increases, thereby increasing the size of the second cutting reamer part 72 enlarging the pilot hole 29, and further decreasing the size of the flattening reamer part 73 enlarging the pilot hole 29. By reducing the size of the flattening reamer 73 to squeeze the pilot hole 29, the power of the drill 26 pushing the reamer through the drill stem 28 to move in the pilot hole 29 is reduced, and the occurrence of insufficient supporting force of the drill stem 28 to the reamer is reduced.
When a reamer is required for use in different pipe 27 runs, the overall soil hardness of the run of different pipes 27 is different, thereby making the initial power of the rig 26 pumping mud different. When the reamer is applied in different pipeline 27 laying, the second cutting rod 9 is pulled, the second cutting rod 9 drives the insert block 16 to be pulled out of the slot 14, and the sliding block 20 moves from the sliding groove 21 positioned on the inner side wall of the slot 14 to the gap between the adjusting column block 17 and the inner bottom wall of the adjusting groove. The second cutting bar 9 is then turned to align the slide 20 with the slide groove 21 in the inner wall of the through hole 19, and the second cutting bar 9 is then pulled further to let the slide 20 enter the slide groove 21 in the inner wall of the through hole 19.
When the slide block 20 enters the inside of the slide groove 21 positioned on the inner wall of the through hole 19, the second cutting rod 9 is rotated, and the slide block 20 is clamped with the slide groove 21, so that the adjusting column block 17 is rotated in the adjusting groove 13. The adjustment block 17 rotates inside the adjustment slot 13, thereby changing the distance between the adjustment block 17 and the inner wall of the second cutting reamer 72. The distance between the adjustment post 17 and the inner wall of the second cutting reamer part 72 is changed to change the elastic force of the spring 123 when the inside of the reamer is not filled with mud. By varying the spring force of the spring 123 when no mud is injected inside the reamer, the reamer is facilitated to be used in different road runs.
Referring to fig. 5 and 6, the guide block 122 is square, the inside of the cross section of the guide tube 121 is square for sliding of the guide block 122, and the outside of the guide tube 121 is circular, so that the obstruction to the mud inside the reamer is reduced. Meanwhile, the guide blocks 122 and the inside of the guide pipe 121 are square, so that the condition that the guide blocks 122 rotate together when the adjusting column block 17 rotates is reduced.
Referring to fig. 5 and 7, the guide block 122 is provided with a plurality of first seal rings 5, and the first seal rings 5 are fitted around the guide block 122. The circumferential side wall of the guide block 122 is provided with a clamping groove 22 for the first sealing ring 5 to enter, and the first sealing rings 5 are arranged at intervals along the length direction of the guide pipe 121. The first seal ring 5 is used to seal the gap between the peripheral side wall of the guide block 122 and the inner wall of the guide tube 121.
Referring to fig. 5 and 6, the guide tube 121 is fixedly provided with a first stopper frame 23 inside, and the first stopper frame 23 is positioned on the inner wall side of the guide block 122 near the second cutting reamer part 72. After the slurry pressure inside the reamer increases, the guide block 122 moves toward the inner wall of the second cutting reamer portion 72. If the guide block 122 presses the first limiting frame 23, the guide block 122 drives the second cutting rod 9 to extend out of the telescopic hole 11 to the maximum extent. And then the guide block 122 is extruded through the first limiting frame 23, so that the condition that the guide block 122 crushes the spring 123 is reduced.
Referring to fig. 6 and 7, the guide tube 121 is provided with a sleeve 25, and the sleeve 25 is screwed on the guide tube 121. A second stop frame 24 is fixedly secured to the end of the sleeve 25 remote from the second cutting reamer portion 72. When there is no mud in the reamer, the spring 123 returns to push the guide block 122 against the second stop frame 24, thereby reducing the removal of the guide block 122 from the guide tube 121.
Referring to fig. 8, 9, 10 and 11, a method for laying a trenchless pipe 27 is constructed using an reamer according to an embodiment of the present application, comprising the steps of:
s1, on-site investigation is conducted to determine the position where the pipeline 27 needs to be paved, and meanwhile, the soil softness of each position on the path where the pipeline 27 is paved is determined. Step S2 is then performed.
S2, excavating working wells at two ends of the position where the pipeline 27 needs to be laid. Step S3 is then performed.
S3, conveying the drilling machine 26 to a working well, placing a drill rod 28 on the drilling machine 26, and installing a drill bit 18 at one end of the drill rod 28. Step S4 is then performed.
S4, the drilling machine 26 injects slurry into the drill rod 28, the slurry in the drill rod 28 is continuously sprayed out of the drill bit 18, then the drilling machine 26 drives the drill bit 18 to drill in from the inner side wall of one working well through the drill rod 28, and then the drill bit 18 penetrates out from the inner side wall of the other working well to form a guide hole 29. Step S5 is then performed.
The junction between the drill bit 18 and the drill rod 28 is slightly inclined and the drill rod 28 is internally fitted with a detector for detecting stones present in the soil. Upon encountering a stone, the drill 26 stops rotating the drill bit 18 through the drill rod 28 and directs the drill bit 18 in one direction. The drill 26 then continues to move the drill bit 18 by pushing it through the drill rod 28, thereby moving the drill bit 18 around the rock. After bypassing the stone, the drill 26 continues to rotate the drill bit 18 through the drill rod 28. The pilot hole 29 is formed after the drill bit 18 has been drilled from the inner sidewall of one work well and then the drill bit 18 has been passed out from the inner sidewall of the other work well.
S5, the drill bit 18 is detached from the drill rod 28. Step S6 is then performed.
S6, preparing a plurality of reamers with different diameters according to the pipelines 27 paved as required. Step S7 is then performed.
Each of the reamers has a diameter greater than the diameter of the pilot hole 29 dug by the drill bit 18, and the largest one of the reamers has a diameter greater than the diameter of the pilot hole 29 required for the laying of the pipe 27. The diameter difference between each two reamers is determined by the overall soil quality on the path of the pipeline 27. The harder the soil, the larger the diameter difference between each reamer and the fewer reamers are required. The softer the soil, the smaller the diameter difference between each reamer and the greater the number of reamers required.
And S7, mounting the reamer on the drill rod 28. Step S8 is then performed.
S8, the drilling machine 26 drives the reamer to move and rotate in the guide hole 29 through the drill rod 28 to ream, and the method comprises the following steps of:
S801, when the soil is softened, the driving component 12 drives the second cutting rod 9 to partially retract into the hole-enlarging tube 7, and when the soil is hardened, the driving component 12 drives the second cutting rod 9 to partially extend out of the hole-enlarging tube 7. Step S802 is then performed.
As the soil softens, the drill 26 reduces the power to pump the mud, thereby partially retracting the second cutting rod 9 inside the bore hole enlarging tube 7. As the soil hardens, the drill 26 increases the power of the pumped mud, causing the second cutting rod 9 to partially protrude inside the expanded pipe 7.
S802, after one reamer is moved from one end to the other end of the guide hole 29, the other reamer having a larger diameter is replaced, and then step S801 is performed. Until each reamer is used, the pilot hole 29 is enlarged to a diameter sufficient to lay the pipe 27, and step S9 is performed.
And S9, installing the pipeline 27 to be laid on one side of the reamer, which is far away from the drill rod 28, wherein the drill 26 pulls the drill rod 28, and the drill rod 28 drives the pipeline 27 to be laid into the guide hole 29.
The reamer and the laying method of the trenchless pipeline 27 of the embodiment of the application are implemented by the principle that when soft soil is encountered, the driving component 12 drives the second cutting rod 9 to partially retract into the second cutting reamer part 72, thereby reducing the size of the second cutting reamer part 72 for enlarging the guide hole 29, increasing the size of the flattening reamer part 73 for enlarging the guide hole 29, and further reducing the occurrence of collapse of the guide hole 29. When the soil is hard, the driving assembly 12 drives the second cutting rod 9 to partially extend out of the second cutting reamer part 72, so that the size of the second cutting reamer part 72 for reaming the guide hole 29 is increased, the size of the flattening reamer part 73 for reaming the guide hole 29 is reduced, and the condition that the power of the drilling machine 26 is overlarge when the reamer is moved through the push rod is further reduced.
The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.
Claims (9)
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| CN202310405391.4A CN116411810B (en) | 2023-04-15 | 2023-04-15 | Reamer and non-excavation pipeline laying method |
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| CN117803316B (en) * | 2024-02-27 | 2024-05-03 | 中铁十九局集团第三工程有限公司 | Rotary drilling and reaming equipment capable of achieving multistage reaming |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204591148U (en) * | 2015-03-31 | 2015-08-26 | 东台市巨力机械制造有限公司 | A kind of cutting type reamer |
| CN208057053U (en) * | 2018-04-03 | 2018-11-06 | 余跃泳 | A kind of geological reamer |
| CN218030052U (en) * | 2022-09-16 | 2022-12-13 | 沧州格锐特钻头有限公司 | Cylinder type reamer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60314160T2 (en) * | 2002-01-14 | 2008-01-24 | Earth Tool Company Llc, Oconomowoc | METHOD AND DEVICE FOR REPLACING UNDERGROUND PIPES |
| US7513318B2 (en) * | 2002-02-19 | 2009-04-07 | Smith International, Inc. | Steerable underreamer/stabilizer assembly and method |
| CN112360343B (en) * | 2020-10-22 | 2022-06-14 | 河北省水利工程局 | Multi-stage reaming process for underground pipeline |
| CN114575743B (en) * | 2022-02-11 | 2025-01-17 | 中冶华南建设工程有限公司 | Non-excavation directional drilling construction method |
| CN115788314A (en) * | 2022-12-26 | 2023-03-14 | 河南理工大学 | A built-in high-pressure water-driven flexible tool retractable device and hole reaming method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204591148U (en) * | 2015-03-31 | 2015-08-26 | 东台市巨力机械制造有限公司 | A kind of cutting type reamer |
| CN208057053U (en) * | 2018-04-03 | 2018-11-06 | 余跃泳 | A kind of geological reamer |
| CN218030052U (en) * | 2022-09-16 | 2022-12-13 | 沧州格锐特钻头有限公司 | Cylinder type reamer |
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