CN216342142U

CN216342142U - Pushing structure

Info

Publication number: CN216342142U
Application number: CN202122818570.XU
Authority: CN
Inventors: 吴仕伟; 张建军; 彭立; 王军
Original assignee: Hunan Jianweitong Mechanical Equipment Co ltd
Current assignee: Hunan Jianweitong Mechanical Equipment Co ltd
Priority date: 2021-09-24
Filing date: 2021-11-17
Publication date: 2022-04-19
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses a pushing structure, comprising: the mounting bracket is provided with two groups of pushing driving mechanisms which are arranged side by side at intervals, the first ends of the two groups of pushing driving mechanisms are fixed with the mounting bracket, the main structure of the main structure is slidably supported on the mounting bracket relative to the first ends of the main structure, and the main structure is provided with a first top ring and a second top ring. The mounting support is further provided with a pushing locking mechanism which is firstly respectively abutted against the two first top rings so as to synchronously slide along the two main body structures in the first extending process of the main body structures, and the pushing locking mechanism is also used for respectively clamping the main body structures when the main body structures retract to the right positions after extending for the first time so as to respectively abut against the two second top rings so as to synchronously slide along the two main body structures again in the second extending process of the main body structures. When the pushing structure is used for pushing the shield machine or the pipeline, the whole action process is simple, the labor intensity of workers is low, and the laying efficiency of the pipeline or the tunnel can be greatly improved.

Description

Pushing structure

Technical Field

The utility model relates to the technical field of water and electricity pipeline construction, in particular to a pushing structure.

Background

When the construction of hydropower pipelines such as subways, railways, highways, municipal works and the like, the existing general construction method comprises the following steps: the method comprises the steps of firstly carrying out semi-closed excavation at a position where a hydroelectric pipeline needs to be laid, namely excavating an inwards-concave installation channel from top to bottom along the length direction of pipeline laying, then laying the hydroelectric pipeline in the installation channel, and finally filling and closing.

In view of these some technical problems that current construction method exists, the utility model relates to a shield constructs machine with similar small-size shield structure of shield structure machine with tunnel tunnelling, this small-size shield constructs machine during operation, its major part is under the top push effect that pushes away the structure, shield according to preset route in the stratum and go out the installation passageway that is used for installing the water and electricity pipeline, then will wait to install the water and electricity pipeline pack into this installation passageway in, adopt the top push structure to push away the end that exposes of installation pipeline again at last to make the shield of installation passageway and the antedisplacement of pipeline lay and go on in step.

The pushing structure comprises a driving structure and a clamping structure, the clamping structure is used for being clamped on the outer circle of the pipeline and is connected with the driving structure, and when the driving structure extends, the clamping structure pushes the pipeline to move forwards, so that the pipeline is moved forwards and laid. During operation, in each telescopic stroke of the driving structure, the clamping structure is hoisted and fixed to the pipeline by the crane, and after the driving structure is stretched in place, the clamping structure is hoisted and taken off from the pipeline by the crane, so that the whole action process is very complicated and complex, the labor intensity of workers is high, the pipeline laying efficiency is very low, and time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pushing structure, which aims to solve the technical problems of complex and complicated action process, high labor intensity of workers and low construction efficiency of the existing pushing structure.

The technical scheme adopted by the utility model is as follows:

a jacking structure comprising: the mounting bracket is slidably supported on the ground, two groups of pushing driving mechanisms are arranged on the mounting bracket at intervals side by side, first ends of the two groups of pushing driving mechanisms are respectively fixed with the mounting bracket, main body structures of the two groups of pushing driving mechanisms are slidably supported on the mounting bracket relative to the first ends of the two groups of pushing driving mechanisms, and are provided with a first top ring and a second top ring which are sequentially arranged at intervals along the sliding direction of the main body structures, and the first top ring is close to the first end of the main body structures; the mounting support is further provided with a pushing locking mechanism in a sliding support mode, the two groups of main structures penetrate through the pushing locking mechanism respectively and freely slide along the axial direction, the pushing locking mechanism is used for firstly abutting against the two first top rings respectively so as to slide along with the two groups of main structures synchronously in the first extending process of the main structures and push the pipelines and/or the shield machine abutted against the main structures forwards, and the pushing locking mechanism is further used for respectively clamping the main structures when the main structures retract to the right position after extending for the first time and abutting against the two second top rings respectively so as to slide along with the two groups of main structures synchronously in the second extending process of the main structures again so as to push the pipelines and/or the shield machine forwards again.

Furthermore, the mounting bracket comprises a supporting underframe which is slidably supported on the ground, and a supporting vertical plate which is vertically supported on one end of the supporting underframe; the fixed ends of the two groups of pushing driving mechanisms are respectively fixed with the supporting vertical plate, and the two groups of main body structures are respectively supported on the supporting underframe in a sliding way relative to the fixed ends of the main body structures; the pushing locking mechanism is arranged perpendicular to the sliding direction of the two main body structures and is supported on the supporting underframe in a sliding manner.

Further, the pushing driving mechanism comprises a guide rod, a sliding sleeve sleeved on the excircle of the guide rod in a sliding manner, a sliding support for supporting the sliding sleeve in a sliding manner, and a plurality of groups of driving cylinders for pushing the sliding sleeve to slide; one end of the guide rod is fixed with the supporting vertical plate; the sliding support is slidably supported on the support underframe, the sliding sleeve is fixedly supported at the top end of the sliding support, the sliding sleeve and the sliding support are connected to form a main structure, and the first top ring and the second top ring are respectively fixed on an excircle of the sliding sleeve; the multiple groups of driving cylinders are uniformly distributed at intervals along the circumferential direction of the guide rod, one end of each driving cylinder is fixed with the supporting vertical plate, and the other end of each driving cylinder, which is arranged oppositely, is connected with the end part, close to the supporting vertical plate, of the sliding sleeve.

Further, the pushing driving mechanism comprises a telescopic cylinder and a sliding support for slidably supporting the telescopic cylinder; the telescopic cylinder comprises an installation outer cylinder and a telescopic rod which is arranged in the installation outer cylinder in a sliding mode, the free end of the telescopic rod is fixed with the supporting vertical plate, and the installation outer cylinder forms a main structure; the sliding support is slidably supported on the mounting underframe, and the mounting outer cylinder is fixedly supported at the top end of the sliding support; the first top ring and the second top ring are respectively connected to the outer circle of the outer cylinder, and the first top ring is close to the supporting vertical plate.

Furthermore, two groups of supporting slide rails which extend and are distributed along the telescopic direction of the pushing driving mechanism are arranged on the supporting underframe; the quantity of the support that slides is the multiunit, and the multiunit support that slides sets up along the axial of installation urceolus interval in proper order, and each support that slides includes the installation extension board, and connects in the gyro wheel of installation extension board bottom, and the gyro wheel rolls to prop up to locate on the support slide rail that corresponds the setting, and the installation urceolus is fixed to prop up and is located the top of installation extension board.

Further, the pushing locking mechanism comprises an installation vertical plate and a locking mechanism for clamping and installing the outer cylinder; the mounting vertical plates are slidably supported on the supporting underframe and are provided with two penetrating holes for two groups of mounting outer cylinders to respectively penetrate through, and the aperture of each penetrating hole is smaller than the outer diameter of the correspondingly arranged first top ring and larger than the outer diameter of the correspondingly arranged second top ring; the locking mechanism is connected to the mounting vertical plate.

Furthermore, the locking mechanism comprises two locking rings which can be tightened inwards or expanded outwards, the two locking rings are arranged corresponding to the two through holes, and the locking rings are sleeved on the outer circles of the correspondingly arranged mounting outer cylinders; the two locking rings are respectively connected with the same locking driving member, and the locking driving members are connected on the mounting vertical plate so as to enable the two groups of locking rings to be synchronously tightened inwards under the action of external force to clamp the corresponding mounting outer cylinders for locking.

Furthermore, each locking ring comprises two locking plates arranged in half, and the bottom ends of the two locking plates are respectively hinged with the mounting vertical plate below the through hole; the locking driving component comprises two groups of traction ropes, two groups of pulley blocks, a driving rod for drawing the traction ropes and a limiting part which extends out and abuts against the driving rod for limiting; the two groups of traction ropes are arranged corresponding to the two locking rings, and one end of each group of traction ropes is connected with the top ends of the two locking plates respectively; the two groups of pulley blocks are arranged corresponding to the two locking rings, each pulley block is rotatably arranged on the mounting vertical plate, and the traction rope penetrates through the pulley blocks and then is connected with the driving rod; the actuating lever is articulated with the installation riser, and locating part sliding connection is on the installation riser.

Furthermore, the pushing and locking mechanism further comprises a positioning ring, and the positioning ring is connected to the outer side face of the mounting vertical plate, which faces the shield tunneling machine or the pipeline, so as to be used for clamping and positioning the end part of the shield tunneling machine or the pipeline.

Furthermore, a communicating hole communicated with the inner cavity of the positioning ring is further formed in the mounting vertical plate, and the outer diameter of the communicating hole is smaller than the inner diameter of the positioning ring.

The utility model has the following beneficial effects:

when the pushing structure is used for pushing the shield machine or the pipeline, the whole action process is simple, the automation degree is high, a hoisting machine is not required to frequently hoist the clamping mechanism, the labor intensity of workers is low, and the laying efficiency of the pipeline or the tunnel can be greatly improved; when the pushing driving mechanism extends for two times, the pushing locking mechanism only locks the main structure once, the operation is simple, time and labor are saved, and compared with the existing driving structure, the clamping structure is required to be clamped and connected and positioned with the shield machine or the pipeline again when the pushing driving mechanism extends for each time; the mounting bracket is slidably supported on the ground, so that the device can be smoothly pushed forward, the main body structure is slidably supported on the mounting bracket, the shield tunneling machine and the pipeline can be smoothly pushed forward, and the pushing quality is improved.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

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

FIG. 1 is a schematic top view of a pushing structure in accordance with a preferred embodiment of the present invention;

fig. 2 is a schematic front view of the push locking mechanism in fig. 1.

Description of the figures

10. Mounting a bracket; 11. a support chassis; 12. supporting a vertical plate; 13. supporting the slide rail; 20. a telescopic cylinder; 21. installing an outer cylinder; 22. a telescopic rod; 30. a slipping bracket; 40. a first top ring; 50. a second top ring; 60. installing a vertical plate; 601. perforating holes; 602. a communicating hole; 70. a locking mechanism; 71. locking a ring; 711. a locking plate; 72. a lock drive member; 721. a hauling rope; 722. a pulley block; 723. a drive rod; 724. a limiting member; 80. a retaining ring.

Detailed Description

The embodiments of the utility model will be described in detail below with reference to the accompanying drawings, but the utility model can be embodied in many different forms, which are defined and covered by the following description.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a jacking structure comprising: the mounting support 10 is slidably supported on the ground, two groups of pushing driving mechanisms are arranged on the mounting support 10 side by side at intervals, first ends of the two groups of pushing driving mechanisms are respectively fixed with the mounting support 10, main structures of the two groups of pushing driving mechanisms are slidably supported on the mounting support 10 relative to the first ends of the two groups of pushing driving mechanisms, first top rings 40 and second top rings 50 are arranged on the main structures at intervals in sequence along the sliding direction of the main structures, and the first top rings 40 are close to the first ends of the first top rings. The mounting bracket 10 is further provided with a pushing locking mechanism in a sliding manner, the two groups of main structures respectively penetrate through the pushing locking mechanism and freely slide along the axial direction, the pushing locking mechanism is used for firstly and respectively abutting against the two first top rings 40 so as to synchronously slide along with the two groups of main structures in the first extending process of the main structures and further push the pipelines and/or the shield machine abutted against the main structures forward, and the pushing locking mechanism is also used for respectively clamping the main structures when the main structures retract to the right position after extending for the first time so as to respectively abut against the two second top rings 50 so as to synchronously slide along with the two groups of main structures again in the second extending process of the main structures so as to push the pipelines and/or the shield machine forward again.

Before the pushing structure works, the pushing driving mechanism retracts to an initial state, and the pushing locking mechanism is arranged close to the first top ring 40; when the pushing structure works, the control system controls the pushing driving mechanism to start so as to enable the main structure to extend outwards, when the main structure extends outwards, the pushing locking mechanism which is abutted against the first top ring 40 extends forwards along with the main structure under the abutting action of the first top ring 40, the pushing locking mechanism abuts against the end part of the shield machine or the pipeline to be pushed forwards, and when the pushing locking mechanism slides forwards, the shield machine or the pipeline is pushed forwards, so that the shield machine and/or the pipeline is pushed forwards; when the main structure extends to a set farthest position, the pushing driving mechanism starts to retract, the main structure reversely retracts until the main structure is in an initial state, and in the process, the pushing locking mechanism is kept still; before the control system controls the pushing driving mechanism to extend outwards for the second time, the pushing locking mechanism clamps the extending section of the pushing driving mechanism, meanwhile, the pushing locking mechanism abuts against the second top ring 50, when the main structure of the pushing driving mechanism extends outwards for the second time, the pushing locking mechanism abutting against the second top ring 50 extends forwards along with the main structure synchronously under the abutting action of the second top ring 50, so that the shield machine or the pipeline is pushed forwards, and the shield machine and/or the pipeline is pushed forwards again.

When the pushing structure is used for pushing the shield machine or the pipeline, the whole action process is simple, the automation degree is high, a hoisting machine is not required to frequently hoist the clamping mechanism, the labor intensity of workers is low, and the laying efficiency of the pipeline or the tunnel can be greatly improved; when the pushing driving mechanism extends for two times, the pushing locking mechanism only locks the main structure once, the operation is simple, time and labor are saved, and compared with the existing driving structure, the clamping structure is required to be clamped and connected and positioned with the shield machine or the pipeline again when the pushing driving mechanism extends for each time; the mounting bracket 10 is slidably supported on the ground, so that the device can be smoothly pushed forward, and the main structure is slidably supported on the mounting bracket 10, so that the shield tunneling machine and the pipeline can be smoothly pushed forward, and the pushing quality is improved.

Alternatively, as shown in fig. 1, the mounting bracket 10 includes a supporting base frame 11 slidably supported on the ground, and a supporting vertical plate 12 vertically supported on one end of the supporting base frame 11; the fixed ends of the two groups of pushing driving mechanisms are respectively fixed with the supporting vertical plate 12, and the two groups of main body structures are respectively supported on the supporting bottom frame 11 in a sliding way relative to the fixed ends of the main body structures; the pushing locking mechanism is arranged perpendicular to the sliding direction of the two main body structures and is supported on the supporting bottom frame 11 in a sliding manner. In the alternative, the mounting bracket 10 has a simple structure, the pushing driving mechanism and the mounting bracket 10 are connected simply, and the arrangement mode of the mounting bracket 10, the pushing driving mechanism and the pushing locking mechanism makes the whole structure of the device of the utility model reasonable and compact.

In this alternative, the first embodiment of the pushing driving mechanism, not shown in the drawings, includes a guide rod, a sliding sleeve slidably fitted on the outer circle of the guide rod, a sliding support for slidably supporting the sliding sleeve, and a plurality of groups of driving cylinders for pushing the sliding sleeve to slide. One end of the guide rod is fixed with the supporting vertical plate 12. The sliding support is slidably supported on the supporting base frame 11, the sliding sleeve is fixedly supported on the top end of the sliding support, the sliding sleeve and the sliding support are connected to form a main structure, and the first top ring 40 and the second top ring 50 are respectively fixed on the outer circle of the sliding sleeve. The multiple groups of driving cylinders are uniformly distributed at intervals along the circumferential direction of the guide rod, one end of each driving cylinder is fixed with the supporting vertical plate 12, and the other end of each driving cylinder, which is arranged oppositely, is connected with the end part, close to the supporting vertical plate 12, of the sliding sleeve. When the pushing and pulling mechanism works, the multiple groups of driving cylinders synchronously stretch and retract under the control of the control system, so that the sliding sleeve arranged in a sliding mode is pushed to slide, the action process is simple, and the structure of the pushing and pulling driving mechanism is simple.

In this alternative, the second embodiment of the pushing driving mechanism, as shown in fig. 1, includes a telescopic cylinder 20 and a sliding support 30 for slidably supporting the telescopic cylinder 20. The telescopic cylinder 20 comprises an installation outer cylinder 21 and a telescopic rod 22 installed in the installation outer cylinder 21 in a sliding mode, the free end of the telescopic rod 22 is fixed with the supporting vertical plate 12, and the installation outer cylinder 21 forms a main structure. The sliding support 30 is slidably supported on the mounting underframe, and the mounting outer cylinder 21 is fixedly supported at the top end of the sliding support 30. The first top ring 40 and the second top ring 50 are respectively connected to the outer circle of the mounting outer cylinder 21, and the first top ring 40 is close to the supporting vertical plate 12. In the alternative, the first top ring 40 and the second top ring 50 are both annular and are welded and fixed on the outer circular surface of the mounting outer cylinder 21; the first top ring 40 is close to the supporting vertical plate 12, and the distance between the first top ring 40 and the second top ring 50 should be the largest on the premise of meeting the requirement of abutting against the pushing locking mechanism respectively, so as to increase the single pushing distance of the shield tunneling machine or the pipeline.

In the embodiment of this alternative, as shown in fig. 1, two sets of supporting slide rails 13 extending in the extending direction of the pushing driving mechanism are disposed on the supporting chassis 11. The quantity of the support 30 that slides is the multiunit, and multiunit support 30 that slides sets up along the axial of installation urceolus 21 interval in proper order, and each support 30 that slides includes the installation extension board, and connects in the gyro wheel of installation extension board bottom, and the gyro wheel rolls to prop up to locate on the support slide rail 13 that corresponds the setting, and the installation urceolus 21 is fixed to prop up the top of locating the installation extension board. The rollers arranged at the top end of the sliding support 30 are in sliding fit with the corresponding supporting slide rails 13 to guide the stretching of the pushing driving mechanism, so that the stretching of the telescopic cylinder 20 is smoothly performed, and the extending direction of the telescopic cylinder 20 is corrected, thereby improving the pushing straightness and the pushing quality of the shield tunneling machine or the pipeline.

Alternatively, as shown in fig. 1 and fig. 2, the pushing locking mechanism includes a mounting upright plate 60 and a locking mechanism 70 for clamping and mounting the outer cylinder 21; the mounting vertical plate 60 is slidably supported on the supporting base frame 11, and is provided with two through holes 601 through which the two sets of mounting outer cylinders 21 respectively penetrate, and the aperture of each through hole 601 is smaller than the outer diameter of the corresponding first top ring 40 and larger than the outer diameter of the corresponding second top ring 50; the locking mechanism 70 is attached to the mounting plate 60. In this alternative, the bottom end of the mounting upright plate 60 is connected with a supporting wheel, and the supporting wheel is slidably supported on the supporting slide rail 13 of the mounting bracket 10 to guide and limit the sliding of the mounting upright plate 60. The aperture of the through hole 601 is smaller than the outer diameter of the first top ring 40, so that the first top ring 40 abuts against the mounting vertical plate 60 to push the mounting vertical plate 60 to slide, and meanwhile, the locking mechanism 70 is convenient to unlock, and the locking mechanism 70 does not need to clamp the mounting outer cylinder 21; the aperture of the through hole 601 is larger than the outer diameter of the second top ring 50, so that when the telescopic cylinder 20 extends and retracts for the first time, the pushing locking mechanism is kept still, and after the locking mechanism 70 clamps the mounting outer cylinder 21 of the telescopic cylinder 20, the second top ring 50 abuts against the pushing locking mechanism again.

In this alternative, as shown in fig. 2, the locking mechanism 70 includes two locking rings 71 that can be tightened inward or expanded outward, the two locking rings 71 are disposed corresponding to the two through holes 601, and the locking rings 71 are used for being sleeved on the outer circles of the corresponding mounting outer cylinders 21; the two locking rings 71 are respectively connected with the same locking driving member 72, and the locking driving member 72 is connected to the mounting vertical plate 60, so that the two groups of locking rings 71 are synchronously tightened inwards under the action of an external force to clamp the corresponding mounting outer cylinder 21 and then locked.

In the embodiment of this alternative, as shown in fig. 2, each locking ring 71 includes two locking plates 711 disposed in half, bottom ends of the two locking plates 711 are hinged to the mounting vertical plate 60 below the through hole 601, and each locking plate 711 is in a shape of a semicircular arc and extends along the circumferential direction of the through hole 601 after being clamped and mounted to the outer cylinder 21. The locking driving member 72 includes two sets of pulling ropes 721, two sets of pulley blocks 722, a driving rod 723 for pulling the pulling ropes 721, and a limiting member 724 extending out and abutting against the driving rod 723 for limiting. Two sets of pulling ropes 721 are disposed corresponding to the two locking rings 71, and one end of each set of pulling ropes 721 is connected to the top ends of the two locking plates 711 respectively. The two sets of pulley blocks 722 are arranged corresponding to the two locking rings 71, each pulley block 722 is rotatably arranged on the mounting vertical plate 60, and the traction rope 721 penetrates through the pulley block 722 and then is connected with the driving rod 723. The driving rod 723 is hinged to the mounting vertical plate 60, and the limiting member 724 is slidably connected to the mounting vertical plate 60. In this alternative embodiment, the pulley block 722 at least includes a traction wheel for guiding and pulling the traction rope 721, and a limiting wheel for limiting the traction rope 721, and the traction rope 721 passes through the traction wheel and the limiting wheel; the limiting part 724 is of a bolt-type structure and comprises a sliding rod, a mounting support and a limiting block, wherein the sliding rod is arranged in a sliding mode, the mounting support is used for mounting the sliding rod in a sliding mode, and the limiting block is used for abutting against a locking plate on the sliding rod for limiting.

When the locking mechanism works, an external force drives the driving rod 723 to rotate, the driving rod 723 pulls the two locking plates 711 to synchronously rotate through the two traction ropes 721, then the two locking plates 711 are relatively close to each other to clamp the installation outer cylinder 21, after the driving rod 723 rotates to a position, the sliding rod of the limiting piece 724 extends out and abuts against the driving rod 723 to be locked, so that the rotating angle of the driving rod 723 is locked, and at the moment, the two locking plates 711 relatively clamp the installation outer cylinder 21.

Optionally, as shown in fig. 1, the pushing and locking mechanism further includes a positioning ring 80, and the positioning ring 80 is connected to the mounting vertical plate 60 and faces the outer side surface of the shield tunneling machine or the pipeline, so as to clamp and position the end of the shield tunneling machine or the pipeline, and facilitate the pushing and locking mechanism to be quickly connected and positioned to the end of the shield tunneling machine or the pipeline. The mounting vertical plate 60 is further provided with a communication hole 602 communicated with the inner cavity of the positioning ring 80, and the outer diameter of the communication hole 602 is smaller than the inner diameter of the positioning ring 80 to form a limiting plate to be abutted against the end part of the shield tunneling machine or the pipeline.

Preferably, as shown in fig. 2, the number of the locking rings 71 is multiple, multiple sets of the locking rings 71 are disposed corresponding to the multiple through holes 601, and each set of the locking rings 71 is connected to the same locking driving member 72 to synchronously drive the multiple sets of the locking rings 71 to synchronously operate.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A jacking structure, comprising:

the pushing device comprises a mounting support (10) which is slidably supported on the ground, wherein two groups of pushing driving mechanisms which are arranged side by side at intervals are arranged on the mounting support (10), first ends of the two groups of pushing driving mechanisms are respectively fixed with the mounting support (10), main structures of the two groups of pushing driving mechanisms are slidably supported on the mounting support (10) relative to the first ends of the two groups of pushing driving mechanisms, first top rings (40) and second top rings (50) which are sequentially arranged at intervals along the sliding direction of the main structures are arranged on the main structures, and the first top rings (40) are close to the first ends of the first top rings;

the mounting support (10) is further provided with a pushing locking mechanism in a sliding support mode, two groups of main structures respectively penetrate through the pushing locking mechanism and freely slide along the axial direction, the pushing locking mechanism is used for firstly and respectively abutting against the two first top rings (40) so as to synchronously slide along with the two groups of main structures in the first extending process of the main structures and further push the pipelines and/or the shield machine abutted against the main structures forwards, and the pushing locking mechanism is further used for respectively clamping the main structures when the main structures retract to the right position after extending for the first time so as to respectively abut against the two second top rings (50) so as to synchronously slide along with the two groups of main structures again in the second extending process of the main structures so as to push the pipelines and/or the shield machine forwards again.

2. The jacking structure of claim 1, wherein,

the mounting bracket (10) comprises a supporting underframe (11) which is slidably supported on the ground, and a supporting vertical plate (12) which is vertically supported on one end of the supporting underframe (11);

the fixed ends of the two groups of pushing driving mechanisms are respectively fixed with the supporting vertical plate (12), and the two groups of main body structures are respectively supported on the supporting bottom frame (11) in a sliding way relative to the fixed ends of the main body structures;

the pushing locking mechanism is perpendicular to the sliding direction of the two main body structures and is supported on the supporting bottom frame (11) in a sliding mode.

3. The jacking structure of claim 2, wherein,

the pushing driving mechanism comprises a guide rod, a sliding sleeve sleeved on the excircle of the guide rod in a sliding manner, a sliding support for supporting the sliding sleeve in a sliding manner, and a plurality of groups of driving cylinders for pushing the sliding sleeve to slide;

one end of the guide rod is fixed with the supporting vertical plate (12);

the sliding support is slidably supported on the supporting underframe (11), the sliding sleeve is fixedly supported at the top end of the sliding support, the sliding sleeve and the sliding support are connected to form the main body structure, and the first top ring (40) and the second top ring (50) are respectively fixed on the excircle of the sliding sleeve;

the multiple groups of driving cylinders are uniformly distributed at intervals along the circumferential direction of the guide rod, one end of each driving cylinder is fixed with the supporting vertical plate (12), and the other end of each driving cylinder, which is arranged oppositely, is connected with the end part, close to the supporting vertical plate (12), of the sliding sleeve.

4. The jacking structure of claim 2, wherein,

the pushing driving mechanism comprises a telescopic cylinder (20) and a sliding support (30) for supporting the telescopic cylinder (20) in a sliding manner;

the telescopic cylinder (20) comprises an installation outer cylinder (21) and a telescopic rod (22) which is arranged in the installation outer cylinder (21) in a sliding mode, the free end of the telescopic rod (22) is fixed with the supporting vertical plate (12), and the installation outer cylinder (21) forms the main body structure;

the sliding support (30) is slidably supported on the supporting underframe (11), and the mounting outer cylinder (21) is fixedly supported at the top end of the sliding support (30);

the first top ring (40) and the second top ring (50) are respectively connected to the outer circle of the mounting outer cylinder (21), and the first top ring (40) is close to the supporting vertical plate (12).

5. The jacking structure of claim 4, wherein,

two groups of supporting slide rails (13) which are arranged in an extending and retracting direction of the pushing driving mechanism are arranged on the supporting underframe (11);

the number of the sliding supports (30) is multiple, the multiple groups of the sliding supports (30) are sequentially arranged at intervals along the axial direction of the installation outer barrel (21), each sliding support (30) comprises an installation support plate and a roller connected to the bottom end of the installation support plate, the rollers are arranged on the corresponding support slide rails (13) in a rolling mode, and the installation outer barrel (21) is fixedly arranged at the top end of the installation support plate.

6. The jacking structure of claim 4, wherein,

the pushing locking mechanism comprises an installation vertical plate (60) and a locking mechanism (70) used for clamping the installation outer cylinder (21);

the mounting vertical plate (60) is slidably supported on the supporting underframe (11), two penetrating holes (601) for two groups of mounting outer cylinders (21) to respectively penetrate are formed in the mounting vertical plate, and the aperture of each penetrating hole (601) is smaller than the outer diameter of the corresponding first top ring (40) and larger than the outer diameter of the corresponding second top ring (50);

the locking mechanism (70) is connected to the mounting vertical plate (60).

7. The jacking structure of claim 6, wherein,

the locking mechanism (70) comprises two locking rings (71) which can be tightened inwards or expanded outwards, the two locking rings (71) are arranged corresponding to the two through holes (601), and the locking rings (71) are used for being sleeved on the outer circles of the correspondingly arranged mounting outer cylinders (21);

the two locking rings (71) are respectively connected with the same locking driving member (72), and the locking driving members (72) are connected to the mounting vertical plate (60) and used for enabling the two groups of locking rings (71) to be synchronously tightened inwards under the action of external force so as to clamp the corresponding mounting outer cylinder (21) and then locking.

8. The jacking structure of claim 7, wherein,

each locking ring (71) comprises two locking plates (711) which are arranged in half, and the bottom ends of the two locking plates (711) are respectively hinged with the mounting vertical plate (60) below the through hole (601);

the locking driving member (72) comprises two groups of traction ropes (721), two groups of pulley blocks (722), a driving rod (723) for drawing the traction ropes (721), and a limiting piece (724) which extends out and abuts against the driving rod (723) for limiting;

the two groups of traction ropes (721) are arranged corresponding to the two locking rings (71), and one end of each group of traction ropes (721) is connected with the top ends of the two locking plates (711) respectively;

the two groups of pulley blocks (722) are arranged corresponding to the two locking rings (71), each pulley block (722) is rotatably arranged on the mounting vertical plate (60), and the traction rope (721) penetrates through the pulley blocks (722) and then is connected with the driving rod (723);

the driving rod (723) is hinged to the mounting vertical plate (60), and the limiting piece (724) is connected to the mounting vertical plate (60) in a sliding manner.

9. The jacking structure of claim 6, wherein,

the pushing locking mechanism further comprises a positioning ring (80), and the positioning ring (80) is connected to the outer side face of the installation vertical plate (60) and faces the shield machine or the pipeline so as to be used for clamping and positioning the end part of the shield machine or the pipeline.

10. The jacking structure of claim 9, wherein,

the mounting vertical plate (60) is further provided with a communication hole (602) communicated with the inner cavity of the positioning ring (80), and the outer diameter of the communication hole (602) is smaller than the inner diameter of the positioning ring (80).