CN-121976809-A - Shield segment vacuum chuck assembling system and assembling method

CN121976809ACN 121976809 ACN121976809 ACN 121976809ACN-121976809-A

Abstract

The invention discloses a shield segment vacuum chuck assembling system and an assembling method, comprising a segment assembly, a vacuum chuck device, a vacuum generating assembly and a vacuum generating assembly, wherein the vacuum chuck device comprises a vacuum chuck and a supporting arm, the supporting arm is connected with the vacuum chuck through a spherical hinge to realize multidirectional adjustment, sealing strips are stuck on the periphery of the lower surface of the vacuum chuck and are used for forming a sealing space with the inner surface of the segment when the sealing strips are compressed, the mechanical clamping assembly comprises a first oil cylinder, a clamping device and an energy storage device, the clamping device is positioned below the first oil cylinder, the clamping device is configured to clamp a hoisting head on the segment and drive the segment to move upwards to compress the sealing strips, and the vacuum generating assembly comprises a vacuum pump and a vacuum box. The duct piece has good effect of bearing the external force, and effectively solves the problem that the external stress of the capping piece is easy to drop. The inner surface area of each segment is basically the same, and the segment sucker is designed into a large vacuum adsorption area and a clamping device, so that the safety of segment sucker assembly is improved, and the risk of broken power segment falling during assembly is reduced.

Inventors

WANG GUOYI
SHI ZHUOCHU
ZHANG HAO
LV PAN
LIU XIUZHENG

Assignees

中电建铁路建设投资集团有限公司
中电建成都建设投资有限公司

Dates

Publication Date: 20260505
Application Date: 20260317

Claims (10)

1. The utility model provides a shield constructs section of jurisdiction vacuum chuck assembly system which characterized in that includes: The duct piece assembly is formed by splicing a plurality of duct pieces into a ring and comprises a first standard block, a second standard block, a third standard block, a first adjacent block, a second adjacent block and a capping block, wherein the capping block is designed to be larger than the rear end in size; The vacuum chuck device comprises a vacuum chuck and a supporting arm, wherein the supporting arm is connected with the vacuum chuck through a spherical hinge to realize multidirectional adjustment; The mechanical clamping assembly comprises a first oil cylinder, a clamping device and an energy storage device, wherein the clamping device is positioned below the first oil cylinder and is used for clamping a hoisting head on a pipe piece and driving the pipe piece to move upwards to compress the sealing strip; the positioning assembly comprises a second oil cylinder and a positioning tenon, and the positioning tenon is configured to extend into a positioning tenon groove on the duct piece so as to realize positioning and shearing resistance; The vacuum generating assembly comprises a vacuum pump and a vacuum box and is used for discharging air in the sealed space to form vacuum and buffering pressure fluctuation; the control and monitoring assembly comprises a contact switch and a vacuum pressure switch, and is configured to allow the assembling action to be executed only when the vacuum degree reaches a preset threshold value and the contact switch detects that the vacuum chuck presses the duct piece.
2. The shield segment vacuum chuck assembly system of claim 1, wherein: all duct pieces of the duct piece assembly are universal rings with wedge-shaped amounts, or the duct piece assembly is designed to include a turning ring combination of a left turning ring, a right turning ring and a straight line ring.
3. The shield segment vacuum chuck assembly system according to claim 1 or 2, wherein: the central angles of the first standard block, the second standard block and the third standard block are all 60 degrees; the central angles of the front ends of the first adjacent block and the second adjacent block are 57 degrees, and the central angles of the rear ends of the first adjacent block and the second adjacent block are 63 degrees; the central angle of the front end of the top sealing block is 66 degrees, and the central angle of the rear end of the top sealing block is 54 degrees.
4. The shield segment vacuum chuck assembly system of claim 1, wherein the system employs a redundant design to reduce failure probability, comprising: Two sets of vacuum pumps; two second vacuum pressure gauges, two second vacuum pressure switches, two contact switches, and two second vacuum filters.
5. The shield segment vacuum chuck assembly system of claim 1 or 4, wherein: the support arm is also provided with a telescopic sleeve; The telescopic sleeve is configured to stretch under the action of different displacement of the left oil cylinder and the right oil cylinder so as to realize the left radial displacement and the right radial displacement of the duct piece assembly and prevent the oil cylinders from being blocked.
6. The shield segment vacuum chuck assembly system of claim 1, wherein the vacuum generating assembly further comprises a two-position three-way valve, a first check valve, a second check valve, a first vacuum filter, a second vacuum filter, and a third vacuum filter; The first check valve is positioned between the vacuum box and the first vacuum filter and is used for preventing air from entering a vacuum area when the vacuum pump stops working; the second check valve is positioned between the two-position three-way valve and the vacuum box; And the third vacuum filter is arranged at the exhaust port of the two-position three-way valve.
7. The shield segment vacuum chuck assembly system of claim 1 or 6, wherein: the volume of the vacuum box is configured to prevent the vacuum from decreasing too fast when a small amount of air enters the vacuum zone; In the positioning assembly, when the second oil cylinder is retracted, the lower end face of the positioning tenon is flush with the lower end face of the vacuum chuck, and when the second oil cylinder extends out, the lower end face of the positioning tenon is in interference fit with the surface of the positioning tenon groove on the duct piece assembly.
8. The shield segment vacuum chuck assembly system of claim 1, wherein: the lower surface of the vacuum chuck forms a single and continuous vacuum adsorption area; the sealing strip is pressed against the inner surfaces of the abutment block and the capping block to form a seal.
9. A shield segment vacuum chuck assembling method applied to the shield segment vacuum chuck assembling system of any one of claims 1 to 8, comprising the following steps: the segment preparation step, namely conveying the segment to the lower part of the splicing machine, installing a hoisting head, and washing the inner surface of the segment; The mechanical pre-tightening step comprises the steps of operating a vacuum chuck device to be close to the pipe piece, controlling a first oil cylinder to extend to enable a clamping device to extend into a hoisting head, then controlling the first oil cylinder to retract, locking the position of the first oil cylinder by utilizing a hydraulic system, enabling the clamping device to clamp the hoisting head and drive the pipe piece to move upwards to compress a sealing strip, and keeping the first oil cylinder in a retracting working state all the time; The vacuum adsorption and mechanical locking step comprises the steps of controlling the second oil cylinder to extend out to enable the positioning tenon into to enter the positioning mortise, starting the vacuum generating assembly, controlling the two-position three-way valve to be in a working position, and discharging air in the sealed space through a pipeline to form vacuum; the state monitoring step is that the control monitoring component monitors that when the vacuum pressure switch detects that the vacuum degree reaches a preset threshold value and the contact switch detects that the vacuum sucker presses the duct piece, the assembly action is allowed to be executed; the segment assembling step is that the assembling machine is controlled to move the segment to the specified position of the shield tail and is connected with other segment bolts, and the vacuum pump continuously works in the assembling process; and (3) after the pipe piece is assembled, controlling the second oil cylinder to retract, closing the vacuum generating assembly, controlling the two-position three-way valve to switch to an air inlet position so that external air enters a sealed space through the third vacuum filter, and then controlling the first oil cylinder to extend out so that the clamping device leaves the hoisting head.
10. The shield segment vacuum chuck assembly method according to claim 9, wherein in the segment assembly step, if the assembled segment is the capping block, the method comprises the following sub-steps: Moving the capping block forward a distance, and radially inserting the capping block between the first adjacent block and the second adjacent block; pushing the pipe segment assembly machine with the pushing oil cylinder longitudinally backwards to connect the capping block with the front end face of the pipe segment of the previous ring; the minimum stroke of the pushing oil cylinder is larger than or equal to the sum of the length of the duct piece when the capping piece can be radially inserted and the distance between the front end face of the capping piece and the front end face of the adjacent block.

Description

Shield segment vacuum chuck assembling system and assembling method Technical Field The invention relates to the field of shield construction, in particular to a shield segment vacuum chuck assembly system and an assembly method. Background The shield is one of the most advanced tunnel construction machines internationally at present, has the advantages of low safety risk, good quality of formed tunnels, fast construction progress, low cost and the like, and is widely applied to urban rail transit construction. Under the general condition, after the shield tunnels 1-ring segment distance, segment erectors on the shield sequentially assemble segments into rings in the shield tail, and then tunnel is tunneled and assembled again, and the circular tunnel is finally formed. The 1-ring duct piece is composed of a plurality of duct pieces and is divided into a standard block, an adjacent block and a capping block, the capping blocks are very small in the conventional duct piece design, and the connecting extension lines of the inner diameter and the outer diameter of the capping blocks are not arranged on the center of a forming tunnel, so that the capping blocks are easy to fall off, a staggering phenomenon is generated, and duct piece breakage and water leakage are seriously caused. The large-diameter shield usually utilizes a vacuum chuck device on a segment erector to assemble segments into rings, and as the sealing top block is very small, the vacuum chuck is generally designed into three vacuum adsorption areas, and the three vacuum adsorption areas are used when the standard block and the adjacent block are assembled. When the sealing block is assembled, the middle small sucker stretches out, and the adsorption area is pressed on the sealing block to be adsorbed and assembled. When the shield splicing machine is powered off, the vacuum pump cannot be started, and the duct piece is easy to fall down, so that a safety accident is generated. In order to prevent safety accidents, a generator is needed to be additionally arranged to supply power for the shield splicing machine. The pipe piece and the vacuum chuck device are urgently needed to solve the problems and improve the pipe piece assembling quality and safety by combining the pipe piece design and the pipe piece vacuum chuck assembling problems. Disclosure of Invention The invention aims to overcome the defects of the existing duct piece design and duct piece vacuum chuck devices and provides a shield duct piece vacuum chuck assembly system and an assembly method. The aim of the invention is realized by the following technical scheme: A shield segment vacuum chuck assembly system, comprising: The duct piece assembly is formed by splicing a plurality of duct pieces into a ring and comprises a first standard block, a second standard block, a third standard block, a first adjacent block, a second adjacent block and a capping block, wherein the capping block is designed to be larger than the rear end in size; The vacuum chuck device comprises a vacuum chuck and a supporting arm, wherein the supporting arm is connected with the vacuum chuck through a spherical hinge to realize multidirectional adjustment, sealing strips are attached to the periphery of the lower surface of the vacuum chuck, and the range of the sealing strips is designed by taking the sizes of an adjacent block and a capping block as a reference and is used for forming a sealing space with the inner surface of a duct piece during compaction; The mechanical clamping assembly comprises a first oil cylinder, a clamping device and an energy storage device, wherein the clamping device is positioned below the first oil cylinder and is used for clamping a hoisting head on a pipe piece and driving the pipe piece to move upwards to compress the sealing strip; the positioning assembly comprises a second oil cylinder and a positioning tenon, and the positioning tenon is configured to extend into a positioning tenon groove on the duct piece so as to realize positioning and shearing resistance; The vacuum generating assembly comprises a vacuum pump and a vacuum box and is used for discharging air in the sealed space to form vacuum and buffering pressure fluctuation; the control and monitoring assembly comprises a contact switch and a vacuum pressure switch, and is configured to allow the assembling action to be executed only when the vacuum degree reaches a preset threshold value and the contact switch detects that the vacuum chuck presses the duct piece. Preferably, all segments of the segment assembly are universal rings with a wedge-shaped amount, or the segment assembly is designed as a turning ring combination comprising a left turning ring, a right turning ring and a straight line ring. Preferably, central angles of the first standard block, the second standard block and the third standard block are 60 degrees; the central angles of the front ends of the first adjacent block and the second adjacent