CN113236274B - Propulsion system suitable for long-distance operation - Google Patents
Propulsion system suitable for long-distance operation Download PDFInfo
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- CN113236274B CN113236274B CN202110726028.3A CN202110726028A CN113236274B CN 113236274 B CN113236274 B CN 113236274B CN 202110726028 A CN202110726028 A CN 202110726028A CN 113236274 B CN113236274 B CN 113236274B
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- 230000007246 mechanism Effects 0.000 claims abstract description 151
- 230000005641 tunneling Effects 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims description 25
- 238000010276 construction Methods 0.000 claims description 24
- 238000005520 cutting process Methods 0.000 claims description 22
- 239000002689 soil Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1086—Drives or transmissions specially adapted therefor
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Abstract
The invention discloses a propulsion system suitable for long-distance operation, which comprises a pipe-jacking tunneling machine and a main jacking oil cylinder, wherein a plurality of pipe joints are acted between the pipe-jacking tunneling machine and the main jacking oil cylinder, the rear end of the pipe-jacking tunneling machine is coupled with a propulsion mechanism for propelling the pipe joints, the propulsion mechanism comprises two positioning devices and a propeller, a plurality of propulsion oil cylinders are arranged in the propeller, the two ends of each propulsion oil cylinder are respectively connected with a front cylinder and a rear cylinder of the propeller, the front cylinder and the rear cylinder of the propeller are respectively connected with the positioning devices at the front end and the rear end, a plurality of positioning mechanisms are arranged in the positioning devices, and after the positioning mechanisms extend out, the positioning devices can be positioned in the stratum, namely after the positioning mechanisms of the propulsion mechanism retract, the positioning devices can be cancelled, and the flexibility is high.
Description
Technical Field
The invention relates to the technical field of pipe-jacking tunneling machine construction, in particular to a propulsion system suitable for long-distance operation.
Background
The main jacking construction mode of the existing pipe-jacking tunneling machine is that a main jacking oil cylinder placed in an initial working well is used for providing jacking thrust (referred to as jacking force for short). Under the general condition, the jacking force of the main jacking oil cylinder acts on the last section of pipeline, and the jacking force is transmitted by the rear pipe section to push the front pipe section to jack until the foremost pipe-jacking tunneling machine is pushed to jack. Along with the deepening of the pipeline, the friction force between the pipe joints and the stratum soil body is gradually increased, so that the jacking force provided by the main jacking oil cylinder is weakened, the jacking pipe tunneling machine cannot form certain continuous and stable pressure on the cut soil body, the cutting efficiency is reduced, and the construction progress is slow.
The stress analysis is carried out on the whole pipe-jacking tunneling construction process, and as shown in figure 1, the force f for maintaining the tunneling work of the pipe-jacking tunneling machine 1 The following relation exists between the jacking force F provided by the main jacking oil cylinder and the friction force F:
f 1 F-F (formula 1)
Relevant researches show that when the pipe-jacking tunneling machine works, certain penetration degree needs to be kept with a tunnel face (namely a cut section of a soil layer) so as to facilitate efficient cutting operation. An important condition for maintaining penetration is to subject the pipe-jacking machine to a continuously stable jacking force, i.e. f 1 . As can be seen from formula 1, theoreticallyWhen f is increasing, want f 1 Keeping it constant, it is necessary to increase F sync or to decrease F by some means.
In practical engineering application, increasing F is to increase the thrust of the main jacking oil cylinder, and the effect of increasing the thrust of the main jacking oil cylinder is limited due to the performance of the oil cylinder product and the pressure bearing capacity of the wall of the working well. Although the use of the relay may be considered in the engineering of medium and long distances, the construction cost is multiplied. In addition, in long-distance pipe-jacking construction work, a long-distance pipeline composed of pipe joints at the rear part of the pipe-jacking tunneling machine is regarded as a flexible line body, and bending, dislocation, deformation and the like of the pipe joints are very easily caused by large jacking force. Therefore, the conventional construction method for realizing the long-distance pipe jacking basically takes the reduction of the friction force f as a starting point, such as a grouting drag reduction method.
The grouting drag reduction method is characterized in that in the construction process, mud fluid with a certain proportion is injected into a gap between a pipe joint and a soil body to play a role in lubrication, and the friction force f between the pipe joint and the soil body is reduced. The method has remarkable effect in construction operation of medium and short distances, but the idea of realizing long-distance pipe jacking operation by only depending on a grouting drag reduction method is not practical. The preparation proportion of the slurry liquid, the long-distance transportation of the slurry liquid and the like are all difficult problems in practical construction.
In addition, a long-distance pipe jacking construction method and a relay connection method are also provided. The pipeline is divided into a plurality of parts by adding one intermediate device in the pipe joints at certain intervals, and the intermediate device is started to alternatively jack the pipeline after the jacking force exceeds a certain preset value. Theoretically, since the friction force f applied to a long-distance pipeline is a friction system, after the pipeline is divided into several parts, the friction force f' applied to each part of pipeline is reduced along with the reduction of the length of each part of pipeline. The method has good practical application effect in long-distance construction, but has the practical problems of complex operation, low construction efficiency, incapability of ensuring the coaxiality of pipelines in front of and behind the relay device and the like.
Such as patent numbers: the CN107339504A internally-spliced pipe-jacking construction process comprises the steps of adding a connecting pipe and a relay ring at the rear part of a pipe-jacking tunneling machine, arranging a bidirectional jack in the relay ring, enabling a jacking rod of the bidirectional jack to extend out in the opposite direction to act on a first pipe joint, and pushing the relay ring, the connecting pipe and the pipe-jacking tunneling machine forward by the obtained supporting force. And then, the jacking rod of the bidirectional jack retracts, and an assembling space is formed between the bidirectional jack and the rear pipe joint. And then transporting the prefabricated pipe piece to the relay ring from the working well, splicing and finishing the laying of the pipe joints.
In principle, the method is very similar to a shield method, a pipe-jacking tunneling machine, a connecting pipe, a relay ring and an initial part of pipe joints are jacked out by a fixed jack (namely a main jacking oil cylinder) in a working well in the initial stage of planing, and the subsequent so-called inner splicing type pipe jacking working method belongs to the shield pipe splicing method and does not belong to the field of pipe jacking construction strictly, so that conceptual confusion is achieved. Moreover, this method has a serious drawback. First, after the top pressure rods of the plurality of bidirectional jacks in the relay ring push the relay ring, the connecting pipe and the pipe-jacking tunneling machine forward, if the top pressure rods retract simultaneously, the front pipe-jacking tunneling machine loses the support of the rear top pressure completely, so that the pressure balance of the tunnel face cannot be maintained. If the number of the segments is small, the pipe-jacking tunneling machine retreats and invades into the splicing space; the excavation section of the pipe-jacking tunneling machine is out of balance, so that the tunnel face collapses, and accidents are caused.
And according to the condition that the section of the prefabricated assembling pipe piece is in the shape of an arc, and the central angle of the arc is 120 degrees or 180 degrees, the assembling pipe joint can be judged to be composed of at most 3 assembling pipe pieces. If the top pressure rod alternatively retracts, the stress area is only the original one when the 3 assembled pipe pieces of each section of pipeline are seen, and the structural stress instability phenomenon can occur under the action of larger top pressure. Although this can reduce the risk by increasing the number of segments making up each segment of duct work, the size of the bi-directional jack is limited, so the number of segments that can be increased is limited.
In addition, the increase of the number of the assembled pipe pieces of each pipeline inevitably reduces the construction efficiency, and the structural strength of the assembled pipe pieces and the sealing among the pipe pieces are not negligible risk points.
Disclosure of Invention
The present invention aims to provide a propulsion system suitable for long-distance operation, and solves the technical problems.
The purpose of the invention can be realized by the following technical scheme:
a propulsion system suitable for long-distance operation comprises a pipe-jacking tunneling machine and a main jacking cylinder, wherein a plurality of pipe joints are acted between the pipe-jacking tunneling machine and the main jacking cylinder, and the rear end of the pipe-jacking tunneling machine is coupled with a propulsion mechanism for propelling the pipe joints.
As a further scheme of the invention: the propelling mechanism comprises a propeller and positioning devices arranged at the front end and the rear end of the propeller;
the propeller comprises a front barrel and a rear barrel, the front barrel is coupled in the rear barrel, the front end of the front barrel and the rear end of the rear barrel are both inwards overturned to form an annular plate, a plurality of propulsion oil cylinders are further arranged in the propeller, the propulsion oil cylinders are arranged between the front barrel and the rear barrel and fixedly connected with the annular plates of the front barrel and the rear barrel, the front barrel is fixedly connected with the positioning device at the front end, and the rear barrel is fixedly connected with the positioning device at the rear end.
As a further scheme of the invention: the positioning device is characterized in that a plurality of positioning mechanisms for self positioning are arranged inside the positioning device, each positioning mechanism comprises a telescopic mechanism and a fixing mechanism, the telescopic mechanisms are used for driving the fixing mechanisms to stretch out and draw back on the shell of the pipe-jacking machine, and the fixing mechanisms are used for inserting soil or pressing the wall surface of an external tunnel to fix the pipe-jacking machine.
As a further scheme of the invention: and a hinge device for connecting the pipe joints is arranged on the positioning device at the rear end of the propelling mechanism.
As a further scheme of the invention: the pipe-jacking tunneling machine comprises a cutter head and a casing, wherein the cutter head is arranged at the front end of the pipe-jacking tunneling machine and used for cutting soil, the casing is used for protecting a driving mechanism of the cutter head, and a receiving port used for being connected with a propelling mechanism is arranged at the rear end of the pipe-jacking tunneling machine.
As a further scheme of the invention: the front end of the propelling mechanism is provided with a socket matched with the rear end of the pipe-jacking tunneling machine and used for fixing the propelling mechanism and the pipe-jacking tunneling machine.
As a further scheme of the invention: a working method of a propulsion system suitable for long-distance operation comprises the following specific steps:
the method comprises the following steps: during initial construction, a main jacking oil cylinder of a working well starts to work, and a pipe jacking tunneling machine, a propelling mechanism and a plurality of sections of pipe joints are sequentially jacked into the stratum;
step two: after the main jacking oil cylinder jacks for a certain distance, when the propelling working resistance of the main jacking oil cylinder of the starting working well is increased to a certain degree, the propelling mechanism starts to work, and the propelling mechanism comprises three steps:
s1: positioning is realized by a positioning device at the rear end of the propelling mechanism, namely, an internal positioning mechanism of the propelling mechanism extends out and is inserted into the stratum to realize positioning, then a propelling oil cylinder in a propeller of the propelling mechanism extends out, the positioning device at the front end of the propelling mechanism and the pipe-jacking tunneling machine are pushed to move forwards and tunnel together, the rear part of the propelling mechanism is fixed, and the pipe-jacking tunneling machine is pushed to move forwards;
s2: the positioning device at the front end of the propelling mechanism realizes positioning, namely the positioning mechanism of the positioning device at the front end in the propelling mechanism extends out, then the positioning mechanism in the positioning device at the rear end of the propelling mechanism retracts, the positioning at the rear end of the propelling mechanism is released, and the rear positioning of the propelling mechanism is changed into front positioning;
s3: the pushing oil cylinder at the front end of the pushing mechanism retracts, meanwhile, the working well main jacking oil cylinder starts to push, the pushing pipe joint advances, the forward pulling of the pushing mechanism and the backward pushing of the working well main jacking oil cylinder are achieved, and the pipe joint is driven to move forwards together.
As a further scheme of the invention: when a propulsion oil cylinder in a propeller of the propulsion mechanism contracts, a rear cylinder of the propeller connects pipe joints together through a hinge device, and a traction effect is generated.
The invention has the beneficial effects that:
(1) the propulsion mechanism comprises two positioning devices and a propeller, wherein a plurality of propulsion oil cylinders are arranged in the propeller, two ends of each propulsion oil cylinder are respectively connected with a front cylinder and a rear cylinder of the propeller, the front cylinder and the rear cylinder of the propeller are respectively connected with the positioning devices at the front end and the rear end, a plurality of positioning mechanisms are arranged in the positioning devices, and the positioning devices can be positioned in the stratum after the positioning mechanisms extend out, namely the positioning mechanisms of the propulsion mechanism can be cancelled after retracting, so that the flexibility is high;
(2) the rear end of the middle propelling mechanism is provided with a hinge device, the propelling mechanism can be hinged with a rear pipe joint through the hinge device, the continuous propelling of the pipe joint is realized, and the practicability is high;
(3) according to the invention, through the arrangement of the propelling mechanism, the jacking force of the pipe-jacking tunneling machine in long-distance pipe-jacking operation is propelled by the main jacking oil cylinder of the starting working well and the propelling mechanism in the traditional construction method, so that the jacking force transmission distance of the pipe-jacking tunneling machine is greatly shortened, the influence of friction force on tunneling jacking force output is avoided, and a reliable research and development platform is provided for the subsequent accurate automatic control of pipe-jacking construction;
(4) aiming at the problem that the long-distance pipe joint is easy to misplace when being stressed in a single direction, the pipe joint is synchronously stressed by the propelling mechanism and the main jacking oil cylinder of the starting working well through the arrangement of the hinging device, and a forward-pulling and backward-pushing effect is formed.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic diagram of the construction of the working process of the present invention;
FIG. 3 is a schematic structural view of the pipe-jacking tunneling machine according to the present invention;
FIG. 4 is a schematic view of the propulsion mechanism of the present invention;
FIG. 5 is a schematic view of the positioning mechanism of the present invention;
FIG. 6 is a schematic view of the structure of the fixing chamber of the present invention;
FIG. 7 is a schematic view of a first embodiment of the support plate of the present invention;
figure 8 is a schematic view of the structure of the nut holder of the present invention.
In the figure: 1. a pipe-jacking tunneling machine; 11. a cutter head; 12. a housing; 13. a socket; 2. a propulsion mechanism; 21. a positioning device; 211. a positioning mechanism; 212. a hinge device; 22. a propeller; 221. a propulsion cylinder; 222. a front barrel; 223. a rear barrel; 3. pipe joints; 4. a main top cylinder; 101. a telescopic oil cylinder; 102. a sector cutting plate; 103. a quadrangular support frame; 5. fixing the cavity; 501. a first support plate; 5011. a chute; 502. a second support plate; 503. a motor; 5031. a first bevel gear; 504. a first screw rod; 5041. a second bevel gear; 5042. a nut seat; 5043. a slider; 505. a second screw; 5051. a third bevel gear; 506. a first supporting block; 507. a second supporting block; 508. a connecting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 2-4, the present invention is a propulsion system suitable for long-distance operation, including a pipe-jacking tunneling machine 1 and a main jacking cylinder 4, wherein a plurality of pipe joints 3 are arranged between the pipe-jacking machine 1 and the main jacking cylinder 4, and a propulsion mechanism 2 for propelling the pipe joints 3 is coupled to the rear end of the pipe-jacking machine 1.
When the device is used, the main jacking oil cylinder 4 of the starting working well works, the pipe-jacking tunneling machine 1, the propelling mechanism 2 and the pipe joints 3 of the plurality of sections are sequentially jacked into the stratum, after the main jacking oil cylinder 4 jacks for a certain distance, and after the propelling working resistance of the main jacking oil cylinder 4 of the starting working well is increased to a certain degree, the propelling mechanism 2 starts to work and cooperates with the continuous propelling of the main jacking oil cylinder 4.
Referring to fig. 4, the propulsion mechanism 2 includes a propeller 22 and positioning devices 21 disposed at front and rear ends of the propeller 22;
the propeller 22 comprises a front barrel 222 and a rear barrel 223, the front barrel 222 is coupled inside the rear barrel 223, the front end of the front barrel 222 and the rear end of the rear barrel 223 are both turned inwards to form annular plates, a plurality of propulsion cylinders 221 are further arranged inside the propeller 22, the propulsion cylinders 221 are arranged between the front barrel 222 and the rear barrel 223 and fixedly connected with the annular plates of the front barrel 222 and the rear barrel 223, the front barrel 222 is fixedly connected with the positioning device 21 at the front end, and the rear barrel 223 is fixedly connected with the positioning device 21 at the rear end.
When in use, the propeller 22 realizes the movement of the propulsion mechanism 2 through the extension and retraction of the propulsion oil cylinder 221, and when the propulsion oil cylinder 221 extends out, the front cylinder 222 and the rear cylinder 223 of the propeller 22 move away relatively; when the propulsion cylinder 221 retracts, the front cylinder 222 and the rear cylinder 223 of the propeller 22 are relatively folded.
Referring to fig. 4-5, a plurality of positioning mechanisms 211 for self-positioning are arranged inside the positioning device 21, each positioning mechanism 211 comprises a telescopic mechanism and a fixing mechanism, each telescopic mechanism is a telescopic cylinder 101, each fixing mechanism is a sector cutting plate 102, each positioning device 21 further comprises a quadrilateral support frame 103 arranged inside the pipe-jacking machine 1, the telescopic cylinders 101 are fixedly connected to four corners of the quadrilateral support frame 103, the output end parts of the telescopic cylinders 101 are fixedly connected with the sector cutting plates 102, and the sector cutting plates 102 penetrate through the shell of the pipe-jacking machine 1 to move in the use process;
the four telescopic oil cylinders 101 are synchronously telescopic in the positioning device 21, and the quadrilateral support frame 103 is of a square structure.
When the telescopic oil cylinder 101 is used, the fan-shaped cutting plates 102 are driven to stretch on the shell of the pipe-jacking tunneling machine 1, and the fan-shaped cutting plates 102 are driven by the telescopic oil cylinder 101 to be inserted into soil or to be pressed against the wall surface of an external tunnel, so that the pipe-jacking tunneling machine 1 is fixed.
Referring to fig. 2, a hinge device 212 for connecting the pipe joint 3 is disposed on the positioning device 21 at the rear end of the propulsion mechanism 2, so as to achieve a traction effect of the propulsion mechanism 2 on the pipe joint 3.
Referring to fig. 3, the pipe-jacking tunneling machine 1 comprises a cutter head 11 and a casing 12, the cutter head 11 is arranged at the front end of the pipe-jacking tunneling machine 1 and used for cutting soil, the casing 12 is used for protecting a driving mechanism of the cutter head 11, the rear end of the pipe-jacking tunneling machine 1 is provided with a receiving port 13 used for being connected with a propelling mechanism 2, the front end of the propelling mechanism 2 is provided with a receiving port 13 matched with the rear end of the pipe-jacking tunneling machine 1 and used for fixing the propelling mechanism 2 and the pipe-jacking tunneling machine 1, so that the connection between the pipe-jacking tunneling machine 1 and the propelling mechanism 2 is more stable.
A working method of a propulsion system suitable for long-distance operation comprises the following specific steps:
the method comprises the following steps: during initial construction, a main jacking oil cylinder 4 of a working well starts to work, and the pipe-jacking tunneling machine 1, the propelling mechanism 2 and a plurality of sections of pipe joints 3 are sequentially jacked into the stratum;
step two: after the main jacking oil cylinder 4 jacks for a certain distance, when the propelling working resistance of the main jacking oil cylinder 4 of the starting working well is increased to a certain degree, the propelling mechanism 2 starts to work, and the propelling mechanism 2 works in three steps:
s1: the positioning device 21 at the rear end of the propulsion mechanism 2 realizes positioning, namely the telescopic oil cylinder 101 drives a piston rod to push the fan-shaped cutting plate 102 to penetrate through the shell of the pipe-jacking tunneling machine 1 and be inserted into the stratum to realize positioning, then the propulsion oil cylinder 221 inside the propeller 22 in the propulsion mechanism 2 extends out to push the positioning device 21 at the front end of the propulsion mechanism 2 and the pipe-jacking tunneling machine 1 to move forwards and tunnel together, so that the rear end of the propulsion mechanism 2 is fixed and the pipe-jacking tunneling machine 1 is pushed to move forwards;
s2: the positioning device 21 at the front end of the propulsion mechanism 2 realizes positioning, namely the telescopic oil cylinder 101 drives a piston rod to push the fan-shaped cutting plate 102 to penetrate through the shell of the pipe-jacking tunneling machine 1 to be inserted into the stratum to realize positioning, then the positioning mechanism 211 of the positioning device 21 at the rear end of the propulsion mechanism 2 retracts, the positioning at the rear end of the propulsion mechanism 2 is released, and the rear positioning of the propulsion mechanism 2 is changed into front positioning;
s3: the pushing oil cylinder 221 at the front end of the pushing mechanism 2 retracts, meanwhile, the working well main jacking oil cylinder 4 starts to push, the pushing pipe joint 3 advances, the forward pulling of the pushing mechanism 2 and the backward pushing of the working well main jacking oil cylinder 4 work simultaneously are achieved, and the pipe joint 3 is driven to move forwards together.
When the propulsion cylinder 221 inside the propeller 22 of the propulsion mechanism 2 is contracted, the rear cylinder 223 of the propeller 22 connects the pipe joints 3 together by the hinge device 212, so as to generate a traction effect.
Wherein, pipe joint 3 includes a plurality of in the work progress, is under construction along the jacking direction by the ground in proper order, and is provided with pipe joint 3's guider on the ground.
Example 2
Referring to fig. 2 to 4, the present invention is a propulsion system suitable for long-distance operation, including a pipe-jacking tunneling machine 1 and a main jacking cylinder 4, wherein a plurality of pipe joints 3 are arranged between the pipe-jacking tunneling machine 1 and the main jacking cylinder 4, and a propulsion mechanism 2 for propelling the pipe joints 3 is coupled to the rear end of the pipe-jacking tunneling machine 1.
When the main jacking oil cylinder 4 of the starting working well works, the pipe-jacking tunneling machine 1, the propelling mechanism 2 and the pipe joints 3 of the plurality of sections are sequentially jacked into the stratum, after the main jacking oil cylinder 4 jacks for a certain distance, when the propelling working resistance of the main jacking oil cylinder 4 of the starting working well is increased to a certain degree, the propelling mechanism 2 starts to work, and the continuous propelling of the main jacking oil cylinder 4 is matched.
Referring to fig. 4, the propulsion mechanism 2 includes a propeller 22 and positioning devices 21 disposed at front and rear ends of the propeller 22;
the propeller 22 comprises a front barrel 222 and a rear barrel 223, the front barrel 222 is coupled inside the rear barrel 223, the front end of the front barrel 222 and the rear end of the rear barrel 223 are both turned inwards to form annular plates, a plurality of propulsion cylinders 221 are further arranged inside the propeller 22, the propulsion cylinders 221 are arranged between the front barrel 222 and the rear barrel 223 and fixedly connected with the annular plates of the front barrel 222 and the rear barrel 223, the front barrel 222 is fixedly connected with the positioning device 21 at the front end, and the rear barrel 223 is fixedly connected with the positioning device 21 at the rear end.
When in use, the propeller 22 realizes the movement of the propulsion mechanism 2 through the extension and retraction of the propulsion oil cylinder 221, and when the propulsion oil cylinder 221 extends out, the front barrel 222 and the rear barrel 223 of the propeller 22 move away relatively; when the propulsion cylinder 221 retracts, the front cylinder 222 and the rear cylinder 223 of the propeller 22 are relatively folded.
Referring to fig. 6-8, a plurality of positioning mechanisms 211 for self-positioning are arranged inside the positioning device 21, the positioning mechanisms 211 include a telescopic mechanism and a fixing mechanism, the telescopic mechanism is a fixing cavity 5, the fixing mechanism is a fan-shaped cutting plate 102, the fixing cavity 5 includes a first support plate 501 and a second support plate 502, the first support plate 501 and the second support plate 502 are erected inside the shell of the pipe-jacking machine 1 side by side, the tops of the first support plate 501 and the second support plate 502 are connected through a sealing plate, a motor 503 is fixedly arranged in the middle of the first support plate 501, an output shaft of the motor 503 penetrates through the first support plate 501 and is arranged inside the fixing cavity 5, a first bevel gear 5031 is arranged on the output shaft of the motor 503, the first bevel gear 5031 is arranged in the middle of the fixing cavity 5, and a first screw 504 and a second screw 505 are respectively arranged on two sides of the first bevel gear 5031, the first screw 504 and the second screw 505 are arranged in the fixed cavity 5 through a first supporting block 506 and a second supporting block 507 at two ends, the rotating directions of the first screw 504 and the second screw 505 are opposite, a second bevel gear 5041 and a third bevel gear 5051 are respectively arranged at one ends of the first screw 504 and the second screw 505, which are close to the first bevel gear 5031, the second bevel gear 5041 and the third bevel gear 5051 are respectively arranged at two sides of the first bevel gear 5031 and are meshed with the first bevel gear 5031, nut seats 5042 are respectively arranged on the first screw 504 and the second screw 505, connecting rods 508 are respectively horizontally arranged at four corners of the outer side of each nut seat 5042, and the other ends of the connecting rods 508 are connected with the sector cutting plates 102;
the nut seat 5042 is slidably connected in the sliding slots 5011 of the first support plate 501 and the second support plate 502 through the sliding blocks 5043 on two sides.
When the pipe jacking machine is used, the motor 503 drives the first bevel gear 5031 to be in meshing transmission with the second bevel gear 5041 and the third bevel gear 5051, so that the first screw 504 and the second screw 505 drive the nut seat 5042 to push towards two sides, the connecting rod 508 is driven to push the sector cutting plate 102 to stretch on the shell of the pipe jacking machine 1, and the sector cutting plate 102 is used for inserting soil or pressing the wall surface of an external tunnel under the driving action of the connecting rod 508, so that the pipe jacking machine 1 is fixed.
Referring to fig. 2, a hinge device 212 for connecting the pipe joint 3 is disposed on the positioning device 21 at the rear end of the propulsion mechanism 2, so as to realize a traction effect of the propulsion mechanism 2 on the pipe joint 3.
Referring to fig. 3, the pipe-jacking tunneling machine 1 comprises a cutter head 11 and a casing 12, the cutter head 11 is arranged at the front end of the pipe-jacking tunneling machine 1 and used for cutting soil, the casing 12 is used for protecting a driving mechanism of the cutter head 11, the rear end of the pipe-jacking tunneling machine 1 is provided with a receiving port 13 used for being connected with a propelling mechanism 2, the front end of the propelling mechanism 2 is provided with a receiving port 13 matched with the rear end of the pipe-jacking tunneling machine 1 and used for fixing the propelling mechanism 2 and the pipe-jacking tunneling machine 1, so that the connection between the pipe-jacking tunneling machine 1 and the propelling mechanism 2 is more stable.
A working method of a propulsion system suitable for long-distance operation comprises the following specific steps:
the method comprises the following steps: during initial construction, a main jacking oil cylinder 4 of a working well starts to work, and the pipe-jacking tunneling machine 1, the propelling mechanism 2 and a plurality of sections of pipe joints 3 are sequentially jacked into the stratum;
step two: after the main jacking oil cylinder 4 jacks for a certain distance, when the propelling working resistance of the main jacking oil cylinder 4 of the starting working well is increased to a certain degree, the propelling mechanism 2 starts to work, and the propelling mechanism 2 comprises three steps:
s1: the positioning device 21 at the rear end of the propulsion mechanism 2 realizes positioning, namely, the motor 503 drives the bevel gear 5031 to be meshed with the bevel gear II 5041 and the bevel gear III 5051 for transmission, so that the screw rod I504 and the screw rod II 505 drive the nut seat 5042 to push towards two sides, so as to drive the connecting rod 508 to push the fan-shaped cutting plate 102 to stretch out and draw back on the shell of the pipe-jacking machine 1, the fan-shaped cutting plate 102 is used for being inserted into the stratum to realize positioning under the driving action of the connecting rod 508, then, the propulsion oil cylinder 221 inside the propeller 22 in the propulsion mechanism 2 extends out, the positioning device 21 at the front end of the propulsion mechanism 2 and the pipe jacking machine 1 are pushed to move forwards and tunnel together, the rear end of the propulsion mechanism 2 is fixed, and the pipe jacking machine 1 is pushed to move forwards;
s2: the positioning device 21 at the front end of the pushing mechanism 2 realizes positioning, namely, the motor 503 drives the bevel gear 5031 to be meshed with the bevel gear II 5041 and the bevel gear III 5051 for transmission, so that the screw rod I504 and the screw rod II 505 drive the nut seat 5042 to push towards two sides, so that the connecting rod 508 is driven to push the sector cutting plate 102 to stretch out and draw back on the shell of the pipe-jacking tunneling machine 1, the sector cutting plate 102 is used for being inserted into the stratum to realize positioning under the driving action of the connecting rod 508, then the positioning mechanism 211 of the positioning device 21 at the rear end of the pushing mechanism 2 retracts, the positioning at the rear end of the pushing mechanism 2 is released, and the rear positioning of the pushing mechanism 2 is changed into front positioning;
s3: the pushing oil cylinder 221 at the front end of the pushing mechanism 2 retracts, meanwhile, the working well main jacking oil cylinder 4 starts to push, the pushing pipe joint 3 advances, the forward pulling of the pushing mechanism 2 and the backward pushing of the working well main jacking oil cylinder 4 work simultaneously are achieved, and the pipe joint 3 is driven to move forwards together.
When the propulsion cylinder 221 inside the propeller 22 of the propulsion mechanism 2 is contracted, the rear cylinder 223 of the propeller 22 connects the pipe joints 3 together by the hinge device 212, so as to generate a traction effect.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A propulsion system suitable for long-distance operation comprises a pipe-jacking tunneling machine (1) and a main jacking cylinder (4), wherein a plurality of pipe joints (3) act between the pipe-jacking tunneling machine (1) and the main jacking cylinder (4), and is characterized in that the rear end of the pipe-jacking tunneling machine (1) is coupled with a propulsion mechanism (2) for propelling the pipe joints (3);
the propelling mechanism (2) comprises a propeller (22) and positioning devices (21) arranged at the front end and the rear end of the propeller (22);
the propeller (22) comprises a front barrel (222) and a rear barrel (223), the front barrel (222) is coupled inside the rear barrel (223), the front end of the front barrel (222) and the rear end of the rear barrel (223) are both inwards turned to form annular plates, a plurality of propulsion oil cylinders (221) are further arranged inside the propeller (22), the propulsion oil cylinders (221) are arranged between the front barrel (222) and the rear barrel (223) and fixedly connected with the annular plates of the front barrel (222) and the rear barrel (223), the front barrel (222) is fixedly connected with the positioning device (21) at the front end, and the rear barrel (223) is fixedly connected with the positioning device (21) at the rear end.
2. The propulsion system suitable for long-distance operation according to claim 1, wherein a plurality of positioning mechanisms (211) for self-positioning are arranged inside the positioning device (21), each positioning mechanism (211) comprises a telescopic mechanism and a fixing mechanism, the telescopic mechanisms are used for driving the fixing mechanisms to be telescopic on the shell of the pipe-jacking machine (1), and the fixing mechanisms are used for inserting soil or pressing the wall surface of an external tunnel to fix the pipe-jacking machine (1).
3. A propulsion system suitable for long-haul operations according to claim 2, wherein the positioning means (21) at the rear end of the propulsion mechanism (2) are provided with hinging means (212) for connecting the pipe joints (3).
4. The propulsion system suitable for long-distance operation according to claim 3, wherein the pipe-jacking machine (1) comprises a cutter head (11) and a casing (12), the cutter head (11) is arranged at the front end of the pipe-jacking machine (1) and used for cutting soil, the casing (12) is used for protecting a driving mechanism of the cutter head (11), and the rear end of the pipe-jacking machine (1) is provided with a socket (13) used for connecting with the propulsion mechanism (2).
5. A propulsion system suitable for long-haul operations according to claim 4, wherein the front end of the propulsion mechanism (2) is provided with a socket (13) adapted to the rear end of the pipe-jacking machine (1) for fixing the propulsion mechanism (2) and the pipe-jacking machine (1).
6. A method of operating a propulsion system for long haul operations as claimed in claim 5, comprising the steps of:
the method comprises the following steps: during initial construction, a main jacking oil cylinder (4) of a working well starts to work, and the pipe-jacking tunneling machine (1), the propelling mechanism (2) and a plurality of sections of pipe joints (3) are sequentially jacked into the ground;
step two: after the main jacking oil cylinder (4) jacks for a certain distance, when the propelling working resistance of the main jacking oil cylinder (4) of the starting working well is increased to a certain degree, the propelling mechanism (2) starts to work, and the propelling mechanism (2) works in three steps:
s1: the positioning device (21) at the rear end of the propelling mechanism (2) realizes positioning, namely the internal positioning mechanism (211) of the propelling mechanism (2) extends out and is inserted into the stratum to realize positioning, then the internal propelling oil cylinder (221) of the propeller (22) of the propelling mechanism (2) extends out, the positioning device (21) at the front end of the propelling mechanism (2) and the pipe-jacking tunneling machine (1) are pushed to move forwards and tunnel together, the rear part of the propelling mechanism (2) is fixed, and the pipe-jacking tunneling machine (1) is pushed to move forwards;
s2: the positioning device (21) at the front end of the propelling mechanism (2) realizes positioning, namely a positioning mechanism (211) in the positioning device (21) at the front end of the propelling mechanism (2) extends out, then the positioning mechanism (211) in the positioning device (21) at the rear end of the propelling mechanism (2) retracts, the positioning at the rear end of the propelling mechanism (2) is released, and the rear positioning of the propelling mechanism (2) is changed into front positioning;
s3: the push oil cylinder (221) at the front end of the push mechanism (2) retracts, meanwhile, the work well main top oil cylinder (4) starts to push, the push pipe joint (3) advances, the forward pulling of the push mechanism (2) and the backward pushing of the work well main top oil cylinder (4) are achieved to work simultaneously, and the pipe joint (3) is driven to move forwards together.
7. Method for operating a propulsion system suitable for long distance operations according to claim 6, characterised in that when the propulsion cylinders (221) inside the propellers (22) of the propulsion unit (2) are retracted, the rear cylinders (223) of the propellers (22) are connected together by the articulated joint (212) creating a traction effect.
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| CN111997634A (en) * | 2020-07-31 | 2020-11-27 | 上海隧道工程有限公司 | Pipe jacking and shield tunneling integrated machine and construction method thereof |
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| CN2297540Y (en) * | 1997-07-11 | 1998-11-18 | 中国科学院南京天文仪器研制中心 | Wriggle type self-propelled entry-driving machine for tunnel or gallery |
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