CN116464488B - Negative ring pipe piece oblique pushing assisting dismounting device, system and dismounting method thereof - Google Patents

Abstract

The invention discloses a negative ring pipe piece oblique pushing assisting dismantling device, a system and a dismantling method thereof, which comprise an upper clamping assembly; the upper clamping assembly comprises an upper arc plate and a lower arc plate, the upper arc plate is positioned at the outer side of the duct piece, the lower arc plate is positioned at the inner side of the duct piece, one end parts of the upper arc plate and one end part of the lower arc plate are connected through a vertical plate, and a gap for the outer side surface of the duct piece to enter is reserved between the other end parts; the ends of the segments to be disassembled, which are connected with the adjacent segments, are positioned between the upper arc plate and the lower arc plate; a fixed rod is arranged between the upper arc plate and the lower arc plate, and the fixed rod sequentially penetrates through and fixedly connects the lower arc plate, the end part of the adjacent duct piece and the upper arc plate; a jacking plate is arranged between the upper arc plate and the lower arc plate; the jacking piece is used for driving the jacking plate to move towards the direction inclined to the reference surface, and the inclined direction is the direction facing the pipe piece to be disassembled. By adopting the scheme, the oblique thrust applied to the end part of the pipe piece to be disassembled can improve the integrity of the end part of the pipe piece in the lifting process through the auxiliary effect of the oblique thrust, so that the effect of recycling is achieved.

Description

Negative ring pipe piece oblique pushing assisting dismounting device, system and dismounting method thereof

Technical Field

The invention relates to the technical field of tunnel shield tunneling machine equipment, in particular to a negative ring pipe slice oblique pushing power assisting dismantling device, a system and a dismantling method thereof.

Background

In the initial stage of shield construction, the negative ring segment needs to be assembled, and enough support reaction force is provided for the shield machine, so that the shield machine can enter a tunnel and normally construct. When the initial tunneling mileage of the shield machine reaches that the friction resistance provided by the segments in the tunnel is greater than the tunneling propelling force of the shield machine, the negative ring segment has a dismantling condition; the negative ring can be removed at this time, and the negative ring segment is a temporary structure, plays a role in transition and support force provision, and is a segment which needs to be detached.

Under normal conditions, after the topmost wedge-shaped duct piece is dismantled, the rest duct pieces to be dismantled are lifted in a direct single-point hoisting mode, so that the duct pieces to be dismantled are pulled, the ends of the duct pieces to be dismantled and the adjacent duct pieces are separated, but the connection between the two ends is firm, and in the lifting and dismantling process, the duct pieces to be dismantled and the adjacent duct piece ends are damaged easily due to upward pulling force, so that the duct pieces cannot be reused after being dismantled. Therefore, in order to protect the integrity of the duct piece, the further provided dismantling mode of the negative ring duct piece has important significance.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a negative ring pipe piece oblique pushing assisting dismantling device, a negative ring pipe piece oblique pushing assisting system and a dismantling method thereof.

The invention is realized by the following technical scheme:

the negative ring pipe piece inclined pushing assisting dismantling device comprises an upper clamping assembly;

the upper clamping assembly comprises an upper arc plate and a lower arc plate, the upper arc plate is positioned on the outer side of the duct piece, the lower arc plate is positioned on the inner side of the duct piece, one end parts of the upper arc plate and one end part of the lower arc plate are connected through a vertical plate, and a gap for the outer side surface of the duct piece to enter is reserved between the other end parts;

the duct piece comprises a duct piece to be disassembled and an adjacent duct piece, and the end parts of the duct piece to be disassembled, which are connected with the adjacent duct piece, are positioned between the upper arc plate and the lower arc plate; a fixed rod is arranged between the upper arc plate and the lower arc plate, and the fixed rod sequentially penetrates through and fixedly connects the lower arc plate, the end part of the adjacent duct piece and the upper arc plate;

a jacking plate is arranged between the upper arc plate and the lower arc plate, the jacking plate is an arc plate, and the radian is matched with the radian of the intrados of the duct piece; the jacking plate is positioned on the intrados of the end part of the pipe piece to be disassembled;

A jacking piece is further arranged on the inner side surface of the lower arc plate, and the output end of the jacking piece is connected with the jacking plate;

the lifting piece is used for driving the lifting plate to move towards a direction inclined to the reference surface, the inclined direction is towards the direction of the segment to be removed, and the included angle between the lifting piece and the reference surface is not more than 30 degrees.

Compared with the prior art, after the topmost wedge-shaped duct piece is dismantled, the rest duct pieces to be dismantled are lifted in a direct single-point hoisting mode, so that the duct pieces to be dismantled are pulled, the ends of the duct pieces to be dismantled and the adjacent duct pieces are connected, but the connection between the two ends is firm, in the lifting and dismantling process, the damage of the duct pieces to be dismantled and the adjacent duct pieces is easily caused by the upward pulling force, so that the problem that the duct pieces cannot be reused after being dismantled is solved. The hoisting strength of the top can be reduced through auxiliary thrust, and the safety is improved;

The negative ring duct piece comprises a duct piece to be disassembled and adjacent duct pieces, wherein the duct piece to be disassembled represents the duct piece to be disassembled, and in the disassembling process, the negative ring duct piece is required to be hoisted on the duct piece to be disassembled through a crane so as to provide upward hoisting force; before dismantling, the upper clamping assembly is installed on the end part of the pipe piece to be dismantled and the end part of the adjacent pipe piece, at the moment, the upper arc plate is positioned on the outer side of the pipe piece to be dismantled, the lower arc plate is positioned on the inner side of the pipe piece to be dismantled, the end parts of the upper arc plate and the lower arc plate are connected through the vertical plates, a gap is reserved between the other ends of the upper arc plate and the lower arc plate, during the installation process, the upper clamping assembly is axially moved along the negative ring pipe piece, the side wall of the pipe piece enters from the opening at the other ends of the upper arc plate and the lower arc plate, and then the upper arc plate and the lower arc plate can be fixed on the inner side and the outer side of the pipe piece through the connecting fixing rod; wherein, can reserve the fixed orifices at the tip of adjacent section of jurisdiction, the penetration of dead lever of being convenient for can all overlap at the both ends position of dead lever and establish the nut, can accomplish fixedly. After the fixing is completed, the jacking plate is driven by the jacking piece to prop against the inner side surface of the end part of the pipe piece to be disassembled, and the jacking plate cannot be contacted with the end part of the adjacent pipe piece; and then, in the lifting process of the crane, the pipe piece to be detached is separated from the end part of the adjacent pipe piece by the oblique boosting of the lifting plate. Because the connecting end surfaces between the pipe piece to be disassembled and the adjacent pipe piece end parts are basically in the radial direction of the negative ring pipe piece assembly, if only upward lifting force is provided or the pushing force is completely in the radial direction in the process of separating the two end parts, the pulling force between the two end parts is overlarge, and the end parts are easy to damage and deform; therefore, by taking the connected end face as a reference surface, through inclined thrust of not more than 30 degrees, combining force in the vertical direction and the radial direction can be provided for the end part, in the lifting process of the crane, only small lifting force is required to be provided, and the rest lifting force is provided by the upper clamping assembly, so that the pipe piece to be dismounted slowly rises, the pipe piece to be dismounted can be dismounted more stably, and the lifting power of the crane can be reduced, thereby further improving the integrity of the pipe piece and the safety in the dismounting process; in addition, since the crane provides a partial lifting force, in the combined thrust of the upper clamping assembly, the lifting component force needs to be reduced, and the component force along the radial direction needs to be increased, so that the duct piece can be more stably inclined, and the damage degree of the duct piece to be dismounted is reduced, namely, the inclined pushing angle of the total inclined pushing force and the included angle between the reference surfaces are not more than 30 degrees. In addition, the jacking piece can adopt jacking equipment such as a hydraulic jack or a hydraulic cylinder and the like, has enough jacking force, and a plurality of jacking pieces and fixing rods can be adopted; because the relative sliding can not be avoided in the lifting process between the lifting plate and the pipe piece to be dismounted, the lifting plate is made of a hard sliding plate material, has enough strength, has a relatively smooth contact surface, and reduces the sliding friction force of the end part of the pipe piece to be dismounted on the lifting plate.

Further, in the process that the jacking plate is jacked, in order to enable the jacking plate to be jacked more stably, the offset is prevented, and the jacking plate is set as: the vertical plate is further provided with a sliding rail arranged along the jacking direction of the jacking plate, the sliding rail is provided with a first sliding block, and the first sliding block is connected with the jacking plate.

Above-mentioned scheme, in the jacking process of jacking board, wait to tear open section of jurisdiction and adjacent section of jurisdiction separation, can not avoid because pull the power and lead to waiting to tear open the section of jurisdiction and produce rocking, very easily cause the destruction of surrounding equipment, consequently, for the stable lifting process of waiting to tear open the section of jurisdiction, set up to: a clamping plate which is used for being abutted against the outer cambered surface of the end part of the pipe piece to be disassembled is further arranged between the upper arc plate and the lower arc plate, and the radian of the clamping plate is matched with the radian of the outer cambered surface of the end part of the pipe piece to be disassembled; the clamping plate is connected with a second sliding block on the sliding rail; a first telescopic rod is connected between the first sliding block and the second sliding block, and the telescopic direction of the first telescopic rod is the jacking direction of the jacking plate; the fixed end of the first telescopic rod is connected with the first sliding block, the telescopic end is provided with a first electromagnet, and the first electromagnet is used for adsorbing the second sliding block. In the scheme, the clamping plate is arranged above the jacking plate and is positioned at the outer side of the end part of the pipe piece to be disassembled, and the clamping plate and the jacking plate can clamp the end part of the pipe piece to be disassembled into the inner part for synchronous lifting; a first telescopic rod is arranged on a first sliding block and a second sliding block which are connected with the clamping plate and the jacking plate, the telescopic end of the first telescopic rod is connected with the second sliding block through a first electromagnet, and the effect of sucking or separating the first sliding block from the second sliding block is achieved through the power on and off of the first electromagnet; the first telescopic rod is a hydraulic control telescopic rod, and the clamping gap between the jacking plate and the clamping plate is adjusted by electrically controlling the telescopic of the hydraulic telescopic rod; in the jacking process, the end part of the pipe piece to be disassembled is stably lifted through synchronous lifting and clamping actions of the jacking plate and the clamping plate.

In the above scheme, if wait to tear open the tip separation back of section of jurisdiction and adjacent section of jurisdiction, jacking board and grip block still will wait to tear open the tip centre gripping of section of jurisdiction, then can lead to waiting to tear open the section of jurisdiction and be unfavorable for being promoted by the continuation, consequently, for loosening the centre gripping of treating tearing open the section of jurisdiction, set up to: the inner side surface of the upper arc plate is provided with a second telescopic rod, and the telescopic direction of the second telescopic rod is the jacking direction of the jacking plate; the fixed end of the second telescopic rod is connected with the inner side face of the upper arc plate, a second electromagnet is arranged on the telescopic end of the second telescopic rod, and the second electromagnet is used for adsorbing the clamping plate. In the scheme, after jacking in place, namely after the pipe piece end to be disassembled is separated from the adjacent pipe piece end, the upper side face of the clamping plate moves to the telescopic end position of the second telescopic rod and is adsorbed by the second electromagnet, the second telescopic rod is a free telescopic rod, and the impact on the upper arc plate is reduced by stretching and buffering the jacking force; then the first electromagnet is disconnected, the jacking piece is controlled to retract, the jacking plate is driven to move downwards, and the clamping space can be separated, so that the end part of the pipe piece to be disassembled is separated; in addition, the opposite side surfaces of the jacking plate and the clamping plate are sliding surfaces, and movable clamping gaps are reserved between the jacking plate and the end parts of the clamped segments to be disassembled, so that transverse adjustment in the lifting process is facilitated.

In the above-mentioned scheme, because jacking board and grip block only have one end to be connected on the slide rail, at jacking centre gripping in-process, very easily lead to the instability that the jacking removed, consequently, for the connection stability with the slide rail improves, set up to: the inner side and the outer side of the vertical plate are respectively provided with a sliding rail, and the left side and the right side of the outer side of the vertical plate are respectively provided with a sliding rail; the first sliding block and the second sliding block are respectively provided with clamping blocks extending outwards from two sides of the vertical plate, the two clamping blocks are U-shaped, and two side edges of the vertical plate are respectively positioned in the two clamping blocks; the side of the clamping block, which is positioned at the outer side of the vertical plate, is connected with the sliding rail at the outer side of the vertical plate; a movable gap is reserved between the bottom of the inner groove of the clamping block and the side edge of the vertical plate. In the scheme, the middle part of the inner side surface of the vertical plate is provided with a sliding rail, two side edges of the outer side surface of the vertical plate are respectively provided with a sliding rail, and at the moment, two ends of the sliding block are extended with U-shaped clamping blocks, so that the sliding blocks are sequentially connected with the three sliding rails in a sliding way, and the movement process of the jacking plate and the clamping plate is more stable; because the slide rail is the slope setting for provide the direction of movement the same with the jacking direction, need leave the clearance that moves between the inside tank bottom of clamp splice and the curb plate of riser, in order to provide the upper and lower space of moving of clamp splice.

In the above-mentioned scheme, the through connection of dead lever needs to be connected along the radial direction of negative ring pipe piece subassembly to form stable supporting connection structure between this and the section of jurisdiction, and because the removal of slider is the incline direction removal, if the both sides of riser are also fan-shaped separately this moment, can lead to the clamp splice not enough activity space when removing along the jacking direction, consequently, for being convenient for leave sufficient activity space for the removal of clamp splice, set up: the two side edges of the vertical plate are parallel to each other, and the central line between the two side edges is the radial direction of the duct piece; the upper arc plate and the lower arc plate are close to the side edges of the adjacent duct pieces and are located in the same radial direction of the duct pieces. In the scheme, two side edges of the vertical plate are parallel, the movable gaps of the opposite sliding blocks are the same, and the same movable gap is reserved; in addition, the side edges of the upper arc plate and the lower arc plate, which are close to the adjacent duct pieces, are positioned in the same radial direction of the duct pieces, namely, the side edges of the upper arc plate exceed the vertical plates and extend outwards continuously so as to facilitate the connection of the fixing rods.

Furthermore, the invention also provides a negative ring pipe piece oblique pushing assisting dismantling system which comprises an oblique pushing assisting dismantling device, an end buckling device and a middle suspender device;

The oblique pushing power-assisted dismantling device further comprises a lower clamping assembly, wherein other structures of the lower clamping assembly are identical to those of the upper clamping assembly except for local distinguishing characteristics; the local distinguishing features include: the upper arc plate in the lower clamping assembly is positioned at the inner side of the duct piece, and the lower arc plate in the lower clamping assembly is positioned at the outer side of the duct piece; the jacking plate in the lower clamping assembly is positioned at the outer side of the duct piece and is matched with the cambered surface of the outer side surface of the duct piece; the clamping plate of the lower clamping assembly is positioned at the inner side of the duct piece and is matched with the cambered surface of the inner side surface of the duct piece;

the end buckling device is used for being connected to the end part of the pipe piece to be disassembled, which is far away from the adjacent pipe piece, and is provided with a first hanging point;

the middle suspender device penetrates through and is fixed on the lifting hole in the middle of the duct piece and is provided with a second lifting point.

In the scheme, in actual lifting, only one lifting point is usually existed in the prior art, which can cause unstable lifting, is easy to shake and even damages adjacent parts, so in order to improve the lifting stability, the invention also provides an end buckling device and a middle suspender device in the lifting process, wherein the end buckling device is provided with a first lifting point at the end part of the pipe piece, and the middle suspender device is provided with a second lifting point at the outer side of the middle part of the pipe piece, thereby forming triangular stable lifting and improving the stability of the pipe piece in the lifting process; the middle suspender device is a conventional suspending rod in the prior art; in addition, because the negative ring pipe piece assembly is divided into an upper half part and a lower half part, under the condition that the external space is limited, in the pipe piece hoisting process of the upper half part, a hoisting point is required to be arranged outside the pipe piece, in the pipe piece hoisting process of the lower plate part, the hoisting point is required to be arranged in the pipe piece, and in the pipe piece oblique pushing process of the lower half part, oblique pushing force in the inward direction is required to be applied, so that the lower clamping assembly is required, the basic structures of the lower clamping assembly and the upper clamping assembly are the same, and the only difference is that: the upper arc plate in the lower clamping assembly is positioned at the inner side of the duct piece, and the lower arc plate in the lower clamping assembly is positioned at the outer side of the duct piece; the jacking plate in the lower clamping assembly is positioned at the outer side of the duct piece and is matched with the cambered surface of the outer side surface of the duct piece; the clamping plate of the lower clamping assembly is positioned at the inner side of the duct piece and is matched with the cambered surface of the inner side surface of the duct piece; thereby providing oblique thrust force to the inner side direction for the end of the segment to be disassembled.

Further, as a specific implementation manner of the end buckling device, it is set as follows: the end buckling device comprises a side plate and a bottom plate, wherein the side plate is used for being clung to the end face of the pipe piece to be disassembled, which is far away from the adjacent pipe piece, and the bottom plate is positioned on the inner side face of the pipe piece to be disassembled and is connected with the side plate; the side plates are provided with screw rods, and the end faces of the segments to be disassembled, which are far away from the adjacent segments, are provided with screw holes matched with the screw rods. In the scheme, the side plate is tightly attached to the end face of the pipe piece to be disassembled, and the bottom plate is connected with the inner side face of the pipe piece to be disassembled, and is similar to an L-shaped structure, so that one corner of the end part is clamped in; the side plates are connected to the end parts of the segments to be disassembled through screws, and threaded holes are reserved in the end parts of the segments to be disassembled.

Further, as a specific implementation manner of the connection of the bottom plate, it is set as follows: one end of the bottom plate, which is far away from the side plate, is hinged with a movable plate, and the rotation axis of the movable plate is parallel to the axis of the negative ring pipe piece; the movable plate is provided with a threaded hole matched with the circumferential bolt. In this scheme, before demolishing, need break the hoop bolt between the adjacent section of jurisdiction, and still can reserve the hoop bolt on waiting to tear open the tip of section of jurisdiction, set up the fly leaf at bottom plate tip this moment, the fly leaf can free rotation, the fly leaf rotates the extension position to the hoop bolt to section of jurisdiction medial surface to through screw hole and hoop bolted connection, with this bottom plate is fixed.

Furthermore, the invention also provides a negative ring pipe piece oblique pushing assisting dismantling method, wherein the negative ring pipe piece assembly comprises an upper half part and a lower half part, the upper half part comprises a wedge-shaped pipe piece, and the method comprises the following steps:

s1: after the wedge-shaped duct piece of the upper half part is removed, an upper clamping assembly is hoisted, the upper clamping assembly is clamped and installed on the end part of the upper half part, where the duct piece to be removed is connected with the adjacent duct piece, and the lower arc plate, the end part of the adjacent duct piece and the upper arc plate are fixed through a plurality of fixing rods;

s2: the end buckling device is fixedly arranged at the end part of the segment to be disassembled, which is far away from the adjacent segment, and a first hanging point is provided; a middle suspender device is arranged at a lifting hole in the middle of the pipe piece to be dismounted, and a second lifting point is provided on the outer side surface of the pipe piece to be dismounted;

s3: the crane is respectively connected with the first lifting point and the second lifting point, drives the jacking plate to prop against the intrados of the pipe piece to be disassembled, then drives the crane to lift up, and continuously jacks up through the jacking piece to provide oblique thrust for the end part of the pipe piece to be disassembled;

s4: the pipe piece to be disassembled is separated from the adjacent pipe piece by lifting and jacking oblique pushing actions of the crane, and the pipe piece to be disassembled is transported outwards;

s5: repeating the steps S1-S4 until the segments to be disassembled in the upper half part are completely disassembled, and then starting to disassemble the segments in the lower plate part;

S6: the lower clamping assembly is hung, the lower clamping assembly is arranged on the end part of the lower half part, where the pipe piece to be disassembled is connected with the adjacent pipe piece, and the lower arc plate, the end part of the adjacent pipe piece and the upper arc plate are fixed through a plurality of fixing rods;

s7: an end buckling device is fixedly arranged at the end part of the segment to be disassembled of the lower half part, which is far away from the adjacent segment, and a first hanging point is provided; a middle suspender device is arranged at a suspending hole in the middle of the pipe piece to be dismounted in the lower half part, and a second suspending point is provided on the inner side surface of the pipe piece to be dismounted;

s8: the crane is respectively connected with the first lifting point and the second lifting point, drives the jacking plate to prop against the outer cambered surface of the pipe piece to be disassembled, then drives the crane to lift up, and continuously jacks up through the jacking piece to provide oblique thrust for the end part of the pipe piece to be disassembled;

s9: the pipe piece to be disassembled is separated from the adjacent pipe piece by lifting and jacking oblique pushing actions of the crane, and the pipe piece to be disassembled is transported outwards;

s10: and (6) repeating the steps (S6-S9), removing the rest segments to be removed except the bottommost segment to be removed, and finally removing the bottommost segment to be removed.

Compared with the prior art, the invention has the following advantages and beneficial effects:

the invention provides a negative ring pipe piece oblique pushing power-assisted dismantling device, a system and a dismantling method thereof, by adopting the scheme, the oblique pushing force applied to the end part of the pipe piece to be dismantled can improve the integrity of the end part of the pipe piece in the lifting process by the auxiliary action of the oblique pushing force, thereby achieving the effect of recycling; the hoisting strength of the top can be reduced through auxiliary thrust, and the safety is improved;

The invention provides a negative ring pipe piece oblique pushing power-assisted dismantling device, a system and a dismantling method thereof, and by adopting the scheme, the invention also provides an end buckling device and a middle suspender device in the lifting process, wherein the end buckling device is provided with a first hanging point at the end part of a pipe piece, and a second hanging point is provided at the outer side of the middle part of the pipe piece through the middle suspender device, so that triangular stable lifting is formed, and the stability of the pipe piece in the lifting process is improved;

the invention provides a negative ring pipe piece oblique pushing assisting dismantling device, a system and a dismantling method thereof.

Drawings

In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art. In the drawings:

FIG. 1 is a schematic view of a negative going pipe assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a dismantling system according to an embodiment of the present invention when dismantling an upper segment;

FIG. 3 is a schematic structural view of an upper clamping assembly according to an embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of an upper clamping assembly according to one embodiment of the present invention;

FIG. 5 is a schematic view of a lower clamping assembly according to an embodiment of the present invention;

FIG. 6 is an enlarged view of the portion A of FIG. 2 provided by the present invention;

FIG. 7 is an enlarged view of the portion B of FIG. 2 provided by the present invention;

fig. 8 is a schematic structural view of a dismantling system according to an embodiment of the present invention when dismantling a lower segment.

In the drawings, the reference numerals and corresponding part names:

the device comprises a 1-upper clamping assembly, a 101-upper arc plate, a 102-lower arc plate, a 103-vertical plate, a 104-lifting plate, a 105-lifting piece, a 106-fixed rod, a 107-sliding rail, a 108-first sliding block, a 109-clamping plate, a 110-second sliding block, a 111-first telescopic rod, a 112-first electromagnet, a 113-second telescopic rod, a 114-second electromagnet, a 2-lower clamping assembly, a 3-end buckling device, a 301-side plate, a 302-bottom plate, a 303-movable plate, a 304-screw rod, a 4-middle suspender device, a 5-circumferential bolt and a 6-negative-pressure pipe piece assembly.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.

Example 1: the embodiment 1 provides a negative ring pipe piece oblique pushing assisting dismounting device, which is shown in fig. 2-4 and comprises an upper clamping assembly 1;

the upper clamping assembly 1 comprises an upper arc plate 101 and a lower arc plate 102, the upper arc plate 101 is positioned at the outer side of a duct piece, the lower arc plate 102 is positioned at the inner side of the duct piece, one end parts of the upper arc plate 101 and one end part of the lower arc plate 102 are connected through a vertical plate 103, and a gap for the outer side surface of the duct piece to enter is reserved between the other end parts;

the duct piece comprises a duct piece to be disassembled and an adjacent duct piece, and the end parts of the duct piece to be disassembled, which are connected with the adjacent duct piece, are positioned between the upper arc plate 101 and the lower arc plate 102; a fixing rod 106 is arranged between the upper arc plate 101 and the lower arc plate 102, and the fixing rod 106 sequentially penetrates through and fixedly connects the lower arc plate 102, the adjacent duct piece end and the upper arc plate 101;

a jacking plate 104 is further arranged between the upper arc plate 101 and the lower arc plate 102, the jacking plate 104 is an arc plate, and the radian is matched with the radian of the intrados of the duct piece; the jacking plate 104 is positioned on the intrados of the end part of the pipe piece to be disassembled;

A jacking piece 105 is further arranged on the inner side surface of the lower arc plate 102, and the output end of the jacking piece 105 is connected with the jacking plate 104;

on the end surface of the segment to be disassembled and the end surface of the segment adjacent to the segment to be disassembled, the direction from the inner side to the outer side is taken as a reference surface, the jacking piece 105 is used for driving the jacking plate 104 to move towards the direction inclined to the reference surface, the inclined direction is the direction facing the segment to be disassembled, and the included angle between the jacking plate and the reference surface is not more than 30 degrees.

Compared with the prior art, after the topmost wedge-shaped duct piece is dismantled, the rest duct pieces to be dismantled are lifted in a direct single-point hoisting mode, so that the duct pieces to be dismantled are pulled, the ends of the duct pieces to be dismantled and the adjacent duct pieces are connected, but the connection between the two ends is firm, in the lifting and dismantling process, the damage of the duct pieces to be dismantled and the adjacent duct pieces is easily caused by the upward pulling force, so that the problem that the duct pieces cannot be reused after being dismantled is solved. The hoisting strength of the top can be reduced through auxiliary thrust, and the safety is improved;

In the concrete scheme, the negative ring duct piece comprises an upper clamping assembly 1, wherein the negative ring duct piece comprises a duct piece to be disassembled and an adjacent duct piece, the duct piece to be disassembled represents the duct piece to be disassembled, and in the disassembling process, the negative ring duct piece is required to be hoisted on the duct piece to be disassembled through a crane so as to provide upward hoisting force; before dismantling, the upper clamping assembly 1 is installed on the end part of the pipe piece to be dismantled and the end part of the adjacent pipe piece, at the moment, the upper arc plate 101 is positioned on the outer side of the pipe piece to be dismantled, the lower arc plate 102 is positioned on the inner side of the pipe piece to be dismantled, the end parts of the upper arc plate 101 and the lower arc plate 102 are connected through the vertical plate 103, at the moment, a gap is reserved between the other ends of the upper arc plate 101 and the lower arc plate 102, during the installation process, the upper clamping assembly 1 is axially moved along the negative ring pipe piece, the side wall of the pipe piece enters from the opening at the other ends of the upper arc plate 101 and the lower arc plate 102, and then the upper arc plate 101 and the lower arc plate 102 can be fixed on the inner side and the outer side of the pipe piece through the connecting fixing rods 106; wherein, can reserve the fixed orifices at the tip of adjacent section of jurisdiction, be convenient for the pass of dead lever 106, can overlap at the both ends position of dead lever 106 and establish the nut, can accomplish fixedly. After the fixing is completed, the jacking plate 104 is driven by the jacking piece 105 to abut against the inner side surface of the end part of the pipe piece to be disassembled, and the jacking plate 104 cannot be contacted with the end part of the adjacent pipe piece; the pipe piece to be disassembled and the end parts of the adjacent pipe pieces can be separated by the oblique boosting of the lifting plate 104 in the lifting process of the crane. Because the connecting end surfaces between the pipe piece to be disassembled and the adjacent pipe piece end parts are basically in the radial direction of the negative ring pipe piece assembly 6, if only upward lifting force is provided or the pushing force is completely in the radial direction in the process of separating the two end parts, the pulling force between the two end parts is overlarge, and the end parts are easily damaged and deformed; therefore, by taking the connected end face as a reference surface, through inclined thrust of not more than 30 degrees, combining force in the vertical direction and the radial direction can be provided for the end part, in the lifting process of the crane, only small lifting force is required to be provided, and the rest lifting force is provided by the upper clamping assembly 1, so that the pipe piece to be dismounted slowly rises, the pipe piece to be dismounted can be dismounted more stably, and the lifting power of the crane can be reduced, thereby further improving the integrity of the pipe piece and the safety in the dismounting process; in addition, since the crane provides a partial lifting force, in the combined thrust of the upper clamping assembly 1, the lifting component force needs to be reduced, and the component force along the radial direction needs to be increased, so that the duct piece can be more stably inclined, and the damage degree of the duct piece to be dismounted is reduced, namely, the inclined pushing angle of the total inclined pushing force and the included angle between the reference surfaces are not more than 30 degrees. In addition, the jacking piece 105 can adopt jacking equipment such as a hydraulic jack or a hydraulic cylinder, and the like, has enough jacking force, and the jacking piece 105 and the fixing rod 106 can adopt a plurality of jacking pieces; because the relative sliding between the jacking plate 104 and the pipe piece to be disassembled is unavoidable in the lifting process, the jacking plate 104 is made of a hard sliding plate material, has enough strength, has a relatively smooth contact surface, and reduces the sliding friction force of the end part of the pipe piece to be disassembled on the jacking plate 104; a plurality of lifting lugs are further arranged at the top of the upper arc plate 101, so that the lifting is convenient.

Further, in the process of lifting the lifting plate 104, in order to enable the lifting plate 104 to be lifted more stably, the device is configured to: the vertical plate 103 is further provided with a sliding rail 107 arranged along the lifting direction of the lifting plate 104, the sliding rail 107 is provided with a first sliding block 108, and the first sliding block 108 is connected with the lifting plate 104.

Above-mentioned scheme, in the jacking process of jacking board 104, wait to tear open section of jurisdiction and adjacent section of jurisdiction separation, can not avoid because pull the power and lead to waiting to tear open the section of jurisdiction and produce rocking, very easily cause the destruction of surrounding equipment, consequently, for the lifting process of stable waiting to tear open the section of jurisdiction, set up to: a clamping plate 109 which is used for being abutted against the outer cambered surface of the end part of the pipe piece to be disassembled is further arranged between the upper arc plate 101 and the lower arc plate 102, and the radian of the clamping plate 109 is matched with the radian of the outer cambered surface of the end part of the pipe piece to be disassembled; the clamping plate 109 is connected with a second sliding block 110 on the sliding rail 107; a first telescopic rod 111 is connected between the first slider 108 and the second slider 110, and the telescopic direction of the first telescopic rod 111 is the lifting direction of the lifting plate 104; the fixed end of the first telescopic rod 111 is connected with the first slider 108, the telescopic end is provided with a first electromagnet 112, and the first electromagnet 112 is used for adsorbing the second slider 110. In the scheme, a clamping plate 109 is further arranged above the jacking plate 104, the clamping plate 109 is positioned on the outer side of the end part of the pipe piece to be disassembled, and at the moment, the clamping plate 109 and the jacking plate 104 can clamp the end part of the pipe piece to be disassembled into the inner part for synchronous lifting; a first telescopic rod 111 is arranged on a first sliding block 108 and a second sliding block 110 which are connected with the clamping plate 109 and the jacking plate 104, the telescopic end of the first telescopic rod 111 is connected with the second sliding block 110 through a first electromagnet 112, and the effect of sucking or separating the first sliding block from the second sliding block 110 is achieved through the on-off of the first electromagnet 112; the first telescopic rod 111 is a hydraulic control telescopic rod, and the clamping gap between the jacking plate 104 and the clamping plate 109 is adjusted by electrically controlling the telescopic operation of the hydraulic telescopic rod; in the lifting process, the ends of the segments to be disassembled are lifted more stably through synchronous lifting and clamping actions of the lifting plate 104 and the clamping plate 109.

In the above-mentioned scheme, if wait to tear open the tip separation back of section of jurisdiction and adjacent section of jurisdiction, jacking plate 104 and grip block 109 still will wait to tear open the tip centre gripping of section of jurisdiction, then can lead to waiting to tear open the section of jurisdiction and be unfavorable for being promoted by continuing, consequently, for unclamping the centre gripping of waiting to tear open the section of jurisdiction, set up as: the inner side surface of the upper arc plate 101 is provided with a second telescopic rod 113, and the telescopic direction of the second telescopic rod 113 is the jacking direction of the jacking plate 104; the fixed end of the second telescopic rod 113 is connected with the inner side surface of the upper arc plate 101, the telescopic end of the second telescopic rod 113 is provided with a second electromagnet 114, and the second electromagnet 114 is used for adsorbing the clamping plate 109. In the scheme, after jacking in place, namely after the pipe piece end to be disassembled is separated from the adjacent pipe piece end, the upper side surface of the clamping plate 109 moves to the telescopic end position of the second telescopic rod 113 and is absorbed by the second electromagnet 114, the second telescopic rod 113 is a free telescopic rod, and the impact on the upper arc plate 101 is reduced by stretching and buffering the jacking force; then the first electromagnet 112 is disconnected, the jacking piece 105 is controlled to retract, the jacking plate 104 is driven to move downwards, and the clamping space can be separated, so that the end part of the segment to be disassembled is separated; in addition, the opposite side surfaces of the jacking plate 104 and the clamping plate 109 are sliding surfaces, and movable clamping gaps are reserved between the jacking plate and the clamped ends of the pipe pieces to be disassembled, so that transverse adjustment in the lifting process is facilitated.

In the above-mentioned scheme, because jacking plate 104 and grip block 109 only have one end to connect on slide rail 107, in jacking centre gripping in-process, very easily lead to the instability that the jacking removed, consequently, for the connection stability with slide rail 107 improves, set up to: the inner side and the outer side of the vertical plate 103 are respectively provided with a sliding rail 107, and the left side and the right side of the outer side of the vertical plate 103 are respectively provided with a sliding rail 107; the first sliding block 108 and the second sliding block 110 are respectively provided with clamping blocks extending outwards from two sides of the vertical plate 103, the two clamping blocks are both U-shaped, and two side edges of the vertical plate 103 are respectively positioned in the two clamping blocks; the edges of the clamping blocks, which are positioned on the outer sides of the vertical plates 103, are connected with sliding rails 107 on the outer sides of the vertical plates 103; a clearance is left between the inner groove bottom of the clamping block and the side edge of the vertical plate 103. In the scheme, a sliding rail 107 is arranged in the middle of the inner side surface of the vertical plate 103, two side edges of the outer side surface of the vertical plate 103 are respectively provided with a sliding rail 107, and at the moment, two ends of the sliding block extend to form a U-shaped clamping block, so that the sliding blocks are sequentially connected with the three sliding rails 107 in a sliding manner, and the movement process of the jacking plate 104 and the clamping plate 109 is more stable; since the slide rail 107 is inclined to provide the same moving direction as the lifting direction, a clearance is required between the inner groove bottom of the clamp block and the side plate 301 of the riser 103 to provide the up-and-down moving space of the clamp block.

In the above-mentioned scheme, the through connection of the fixing rod 106 needs to be connected along the radial direction of the negative ring pipe piece assembly 6 to form a stable supporting connection structure with the pipe piece, and because the movement of the sliding block is the movement of the inclined direction, if at this time the two sides of the vertical plate 103 are also fan-shaped to separate, the clamping block will not have enough activity space when moving along the jacking direction, therefore, in order to provide enough activity space for the movement of the clamping block, it is set as: the two sides of the vertical plate 103 are parallel to each other, and the center line between the two sides is the radial direction of the duct piece; the upper arc plate 101 and the lower arc plate 102 are located in the same radial direction of the segment near the side edges of the adjacent segments. In the scheme, two side edges of the vertical plate 103 are parallel, the movable clearance relative to the sliding block is the same, and the same movable clearance is reserved; in addition, the sides of the upper arc plate 101 and the lower arc plate 102, which are close to the adjacent segments, are located in the same radial direction of the segments, i.e., the sides of the upper arc plate 101 exceed the risers 103 and continue to extend outwardly to facilitate the connection of the fixing bars 106.

Example 2: the embodiment 2 is further optimized on the basis of the embodiment 1, and provides a negative ring pipe piece oblique pushing assisting dismounting system, which comprises an oblique pushing assisting dismounting device, an end buckling device 3 and a middle suspender device 4, as shown in fig. 1-2 and 5-8;

The oblique pushing power-assisted dismantling device further comprises a lower clamping assembly 2, wherein the lower clamping assembly 2 has the same structure as the upper clamping assembly 1 except for local distinguishing characteristics; the local distinguishing features include: the upper arc plate 101 in the lower clamping assembly 2 is positioned at the inner side of the duct piece, and the lower arc plate 102 in the lower clamping assembly 2 is positioned at the outer side of the duct piece; the jacking plate 104 in the lower clamping assembly 2 is positioned at the outer side of the duct piece and is matched with the cambered surface of the outer side surface of the duct piece; the clamping plate 109 of the lower clamping assembly 2 is positioned at the inner side of the duct piece and is matched with the cambered surface of the inner side surface of the duct piece;

the end buckling device 3 is used for being connected to the end part of the pipe piece to be disassembled, which is far away from the adjacent pipe piece, and the end buckling device 3 is provided with a first hanging point;

the middle suspender device 4 penetrates through and is fixed on the lifting hole in the middle of the duct piece and is provided with a second lifting point.

In the scheme, in actual lifting, only one lifting point is usually existed in the prior art, which can cause unstable lifting, is easy to shake and even damages adjacent parts, so in order to improve the lifting stability, the invention also provides an end buckling device 3 and a middle suspender device 4 in the lifting process, the end buckling device 3 is provided with a first lifting point at the end part of the pipe piece, and the middle suspender device 4 is provided with a second lifting point at the outer side of the middle part of the pipe piece, thereby forming triangular stable lifting, and further improving the stability of the pipe piece in the lifting process; wherein the middle suspender device 4 is a conventional suspending rod in the prior art; in addition, since the negative ring pipe piece assembly 6 is divided into the upper half part and the lower half part, under the condition that the external space is limited, in the pipe piece lifting process of the upper half part, the lifting point needs to be arranged outside the pipe piece, and in the pipe piece lifting process of the lower plate part, the lifting point needs to be arranged in the pipe piece, in the pipe piece oblique pushing process of the lower half part, oblique pushing force in the inward direction needs to be applied, therefore, the lower clamping assembly 2 is needed, the basic structures of the lower clamping assembly 2 and the upper clamping assembly 1 are the same, and the only difference is that: the upper arc plate 101 in the lower clamping assembly 2 is positioned at the inner side of the duct piece, and the lower arc plate 102 in the lower clamping assembly 2 is positioned at the outer side of the duct piece; the jacking plate 104 in the lower clamping assembly 2 is positioned at the outer side of the duct piece and is matched with the cambered surface of the outer side surface of the duct piece; the clamping plate 109 of the lower clamping assembly 2 is positioned at the inner side of the duct piece and is matched with the cambered surface of the inner side surface of the duct piece; thereby providing oblique thrust force to the inner side direction for the end of the segment to be disassembled.

Further, as a specific implementation manner of the end buckling device 3, it is provided that: the end buckling device 3 comprises a side plate 301 and a bottom plate 302, the side plate 301 is used for being clung to the end face of the pipe piece to be disassembled far away from the adjacent pipe piece, and the bottom plate 302 is positioned on the inner side face of the pipe piece to be disassembled and is connected with the side plate 301; the side plate 301 is provided with a screw 304, and the end surface of the segment to be disassembled, which is far away from the adjacent segment, is provided with a screw hole matched with the screw 304. In the scheme, a side plate 301 is tightly attached to the end face of a pipe piece to be disassembled, and a bottom plate 302 is connected with the inner side face of the pipe piece to be disassembled, and is similar to an L-shaped structure, so that one corner of the end part is clamped in; the side plate 301 is connected to the end of the segment to be disassembled through a screw 304, and a threaded hole is reserved on the end of the segment to be disassembled.

Further, as a specific implementation manner of the connection of the base plate 302, it is set as follows: a movable plate 303 is hinged to one end of the bottom plate 302, which is far away from the side plate 301, and the rotation axis of the movable plate 303 is parallel to the axis of the negative ring pipe piece; the movable plate 303 is provided with a threaded hole matched with the circumferential bolt 5. In this scheme, before demolishing, need break the hoop bolt 5 between the adjacent section of jurisdiction, and still can reserve hoop bolt 5 on waiting to tear open the tip of section of jurisdiction, set up fly leaf 303 at bottom plate 302 tip this moment, fly leaf 303 can free rotation, and fly leaf 303 rotates the extension position of hoop bolt 5 to the section of jurisdiction medial surface to connect through screw hole and hoop bolt 5, so as to fix bottom plate 302.

Example 3: in the negative ring pipe piece assembly 6, the negative ring pipe piece assembly is specifically divided into an upper half part and a lower half part, and the topmost part in the upper half part is also provided with a wedge-shaped pipe piece smaller than other pipe pieces, and the wedge-shaped pipe piece is inconvenient to obliquely push during disassembly, so that the disassembly is required to be performed in a conventional manner, and then the rest pipe pieces to be disassembled are removed, and the specific disassembly process comprises the following detailed steps:

s1: after the wedge-shaped duct piece of the upper half is removed, the duct piece of the upper half is required to be removed firstly, the upper clamping assembly 1 is lifted, the upper clamping assembly 1 is clamped and installed on the end portion of the upper half, where the duct piece to be removed is connected with the adjacent duct piece, in the clamping process, the first electromagnet 112 is electrified, the clamping space of the jacking plate 104 and the clamping plate 109 is changed by changing the expansion and contraction amount of the first telescopic rod 111, and after the position adjustment is finished, the lower arc plate 102, the end portion of the adjacent duct piece and the upper arc plate 101 are fixed through the fixing rods 106.

S2: after the fixation is completed, an end buckling device 3 is fixedly arranged at the end part of the segment to be disassembled, which is far away from the adjacent segment, a screw rod 304 is arranged on the side plate 301, the movable plate 303 is rotated to be connected with the circumferential bolt 5, and at the moment, a first hanging point is provided on the back surface of the side plate 301; and a middle suspender device 4 is arranged at a lifting hole in the middle of the pipe piece to be dismounted, and a second lifting point is provided on the outer side surface of the pipe piece to be dismounted.

S3: and then the lifting plate 104 is driven to prop against the intrados of the pipe piece to be disassembled by being respectively connected with the first lifting point and the second lifting point through the crane, and then the lifting plate is driven to lift up and continuously lift up through the lifting piece 105, so that oblique thrust is provided for the end part of the pipe piece to be disassembled.

S4: the pipe piece to be disassembled is separated from the adjacent pipe piece by lifting and jacking oblique pushing actions of the crane, after separation, the second electromagnet 114 is electrified, the second electromagnet 114 adsorbs the clamping plate 109, the first electromagnet 112 is powered off, the jacking piece 105 is controlled to retract, the jacking plate 104 and the clamping plate 109 are separated, separation of the end part of the pipe piece is facilitated, and then the pipe piece to be disassembled is transported outwards; in the process of dismantling the segments to be dismantled in the upper half part, the segments on two sides are obliquely pushed by adopting symmetrical oblique pushing power-assisted assemblies respectively.

S5: repeating the steps S1-S4 until the segments to be disassembled in the upper half part are completely disassembled, and then starting to disassemble the segments in the lower plate part;

s6: the lower clamping assembly 2 is hung, the lower clamping assembly 2 is arranged on the end part of the lower half part, where the pipe piece to be disassembled is connected with the adjacent pipe piece, and the lower arc plate 102, the end part of the adjacent pipe piece and the upper arc plate 101 are fixed through a plurality of fixing rods 106; the steps are basically the same as those of S1, except that: the upper arc plate 101 is positioned on the inner side of the duct piece, and the lower arc plate 102 is positioned on the outer side of the duct piece;

S7: an end buckling device 3 is fixedly arranged at the end part of the segment to be disassembled of the lower half part, which is far away from the adjacent segment, and a first hanging point is provided; a middle suspender device 4 is arranged at a lifting hole in the middle of the pipe piece to be dismounted in the lower half part, and a second lifting point is provided on the inner side surface of the pipe piece to be dismounted; substantially the same as step S2, the only difference being that: the second suspension point provided by the middle suspension rod device 4 is positioned on the inner side of the duct piece.

S8: the crane is respectively connected to the first lifting point and the second lifting point, drives the jacking plate 104 to prop against the outer cambered surface of the pipe piece to be disassembled, then drives the crane to lift up, and continuously jacks up through the jacking piece 105 to provide oblique thrust for the end part of the pipe piece to be disassembled;

s9: the pipe piece to be disassembled is separated from the adjacent pipe piece by lifting and jacking oblique pushing actions of the crane, and the pipe piece to be disassembled is transported outwards;

s10: and (6) repeating the steps (S6-S9), removing the rest segments to be removed except the bottommost segment to be removed, and finally removing the bottommost segment to be removed.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The negative ring pipe piece oblique pushing assisting dismantling device is characterized by comprising an upper clamping assembly (1);

the upper clamping assembly (1) comprises an upper arc plate (101) and a lower arc plate (102), the upper arc plate (101) is positioned on the outer side of a duct piece, the lower arc plate (102) is positioned on the inner side of the duct piece, one end parts of the upper arc plate (101) and one end part of the lower arc plate (102) are connected through a vertical plate (103), and a gap for the outer side surface of the duct piece to enter is reserved between the other end parts;

the duct piece comprises a duct piece to be disassembled and an adjacent duct piece, and the end parts of the duct piece to be disassembled, which are connected with the adjacent duct piece, are positioned between the upper arc plate (101) and the lower arc plate (102); a fixed rod (106) is arranged between the upper arc plate (101) and the lower arc plate (102), and the fixed rod (106) sequentially penetrates through and fixedly connects the lower arc plate (102), the end part of the adjacent duct piece and the upper arc plate (101);

a jacking plate (104) is further arranged between the upper arc plate (101) and the lower arc plate (102), the jacking plate (104) is an arc plate, and the radian is matched with the radian of the intrados of the duct piece; the jacking plate (104) is positioned on the intrados of the end part of the pipe piece to be disassembled;

a jacking piece (105) is further arranged on the inner side surface of the lower arc plate (102), and the output end of the jacking piece (105) is connected with the jacking plate (104);

On the terminal surface that wait to tear open section of jurisdiction and adjacent section of jurisdiction are connected, regard the direction from inside to outside as the reference surface, jacking piece (105) are used for driving jacking board (104) are towards the direction of slope in the reference surface remove, and the incline direction is for the direction of waiting to tear open the section of jurisdiction, and with the contained angle between the reference surface is no more than 30.

2. The negative ring pipe piece oblique pushing power assisting dismantling device according to claim 1, wherein a sliding rail (107) arranged along the jacking direction of the jacking plate (104) is further arranged on the vertical plate (103), a first sliding block (108) is arranged on the sliding rail (107), and the first sliding block (108) is connected with the jacking plate (104).

3. The negative ring pipe piece oblique pushing power-assisted dismantling device according to claim 2, wherein a clamping plate (109) used for being abutted on the outer arc surface of the end part of the pipe piece to be dismantled is further arranged between the upper arc plate (101) and the lower arc plate (102), and the radian of the clamping plate (109) is matched with the radian of the outer arc surface of the end part of the pipe piece to be dismantled; the clamping plate (109) is connected with a second sliding block (110) on the sliding rail (107); a first telescopic rod (111) is connected between the first sliding block (108) and the second sliding block (110), and the telescopic direction of the first telescopic rod (111) is the jacking direction of the jacking plate (104); the fixed end of the first telescopic rod (111) is connected with the first sliding block (108), a first electromagnet (112) is arranged on the telescopic end, and the first electromagnet (112) is used for adsorbing the second sliding block (110).

4. A negative ring pipe diagonal pushing assisting dismantling device according to claim 3, characterized in that the inner side surface of the upper arc plate (101) is provided with a second telescopic rod (113), and the telescopic direction of the second telescopic rod (113) is the lifting direction of the lifting plate (104); the fixed end of the second telescopic rod (113) is connected with the inner side surface of the upper arc plate (101), a second electromagnet (114) is arranged on the telescopic end of the second telescopic rod (113), and the second electromagnet (114) is used for adsorbing the clamping plate (109).

5. The negative ring pipe piece oblique pushing power assisting dismantling device according to claim 3, wherein sliding rails (107) are arranged on the inner side and the outer side of the vertical plate (103), and sliding rails (107) are arranged on the left side and the right side of the outer side of the vertical plate (103); the first sliding block (108) and the second sliding block (110) are respectively provided with clamping blocks extending towards the outer sides of two sides of the vertical plate (103), the two clamping blocks are U-shaped, and two side edges of the vertical plate (103) are respectively positioned in the two clamping blocks; the side of the clamping block, which is positioned at the outer side of the vertical plate (103), is connected with a sliding rail (107) at the outer side of the vertical plate (103); a movable gap is reserved between the inner groove bottom of the clamping block and the side edge of the vertical plate (103).

6. The negative collar tab oblique pushing assist removal device of any of claims 1-5, wherein two sides of the riser (103) are parallel to each other, and a center line between the two sides is a radial direction of the tab; the side edges of the upper arc plate (101) and the lower arc plate (102) close to the adjacent duct pieces are positioned in the same radial direction of the duct pieces.

7. The negative ring pipe piece oblique pushing assisting dismounting system is characterized by comprising an oblique pushing assisting dismounting device, an end buckling device (3) and a middle suspender device (4);

the oblique pushing power-assisted dismantling device is according to any one of claims 1-6;

the oblique pushing power-assisted dismantling device further comprises a lower clamping assembly (2), wherein other structures of the lower clamping assembly (2) are identical to those of the upper clamping assembly (1) except for local distinguishing characteristics; the local distinguishing features include: an upper arc plate (101) in the lower clamping assembly (2) is positioned at the inner side of the duct piece, and a lower arc plate (102) in the lower clamping assembly (2) is positioned at the outer side of the duct piece; the jacking plate (104) in the lower clamping assembly (2) is positioned at the outer side of the duct piece and is matched with the cambered surface of the outer side surface of the duct piece; the clamping plate (109) of the lower clamping assembly (2) is positioned at the inner side of the duct piece and is matched with the cambered surface of the inner side surface of the duct piece;

The end buckling device (3) is used for being connected to the end part of the segment to be disassembled, which is far away from the adjacent segment, and the end buckling device (3) is provided with a first hanging point;

the middle suspender device (4) is fixedly penetrated on a lifting hole in the middle of the duct piece and is provided with a second lifting point.

8. The negative ring pipe piece oblique pushing assisting dismantling system according to claim 7, wherein the end buckling device (3) comprises a side plate (301) and a bottom plate (302), the side plate (301) is used for being clung to the end face of the pipe piece to be dismantled away from the adjacent pipe piece, and the bottom plate (302) is located on the inner side face of the pipe piece to be dismantled and connected with the side plate (301);

the side plates (301) are provided with screw rods (304), and the end faces of the segments to be disassembled, which are far away from the adjacent segments, are provided with screw holes matched with the screw rods (304).

9. The negative ring pipe piece oblique pushing assisting dismantling system according to claim 8, wherein one end of the bottom plate (302) far away from the side plate (301) is hinged with a movable plate (303), and the rotation axis of the movable plate (303) is parallel to the negative ring pipe piece axis; the movable plate (303) is provided with a threaded hole matched with the circumferential bolt (5).

10. The method of removing a negative-loop-piece diagonal-push assist removal system of any of claims 7-9, wherein the negative-loop-piece assembly comprises an upper half and a lower half, the upper half comprising a wedge-shaped piece, comprising the steps of:

s1: after the wedge-shaped duct piece of the upper half part is removed, the upper clamping assembly (1) is hoisted, the upper clamping assembly (1) is clamped and installed on the end part of the upper half part, where the duct piece to be removed is connected with the adjacent duct piece, and the lower arc plate (102), the end part of the adjacent duct piece and the upper arc plate (101) are fixed through a plurality of fixing rods (106);

s2: an end buckling device (3) is fixedly arranged at the end part of the segment to be disassembled, which is far away from the adjacent segment, and a first hanging point is provided; a middle suspender device (4) is arranged at a lifting hole in the middle of the pipe piece to be dismounted, and a second lifting point is provided on the outer side surface of the pipe piece to be dismounted;

s3: the crane is respectively connected to the first lifting point and the second lifting point, drives the lifting plate (104) to prop against the intrados of the pipe piece to be disassembled, then drives the crane to lift up, and continuously lifts up through the lifting piece (105) to provide oblique thrust for the end part of the pipe piece to be disassembled;

s4: the pipe piece to be disassembled is separated from the adjacent pipe piece by lifting and jacking oblique pushing actions of the crane, and the pipe piece to be disassembled is transported outwards;

S5: repeating the steps S1-S4 until the segments to be disassembled in the upper half part are completely disassembled, and then starting to disassemble the segments in the lower plate part;

s6: the lower clamping assembly (2) is hung, the lower clamping assembly (2) is arranged on the end part of the lower half part, which is connected with the adjacent pipe piece, of the pipe piece to be disassembled, and the lower arc plate (102), the end part of the adjacent pipe piece and the upper arc plate (101) are fixed through a plurality of fixing rods (106);

s7: an end buckling device (3) is fixedly arranged at the end part of the segment to be disassembled of the lower half part, which is far away from the adjacent segment, and a first hanging point is provided; a middle suspender device (4) is arranged at a lifting hole in the middle of the pipe piece to be dismounted in the lower half part, and a second lifting point is provided on the inner side surface of the pipe piece to be dismounted;

s8: the crane is respectively connected to the first lifting point and the second lifting point, drives the lifting plate (104) to prop against the outer cambered surface of the pipe piece to be disassembled, then drives the crane to lift up, and continuously lifts up through the lifting piece (105) to provide oblique thrust for the end part of the pipe piece to be disassembled;

s9: the pipe piece to be disassembled is separated from the adjacent pipe piece by lifting and jacking oblique pushing actions of the crane, and the pipe piece to be disassembled is transported outwards;

s10: and (6) repeating the steps (S6-S9), removing the rest segments to be removed except the bottommost segment to be removed, and finally removing the bottommost segment to be removed.