Non-negative-ring intelligent continuous starting device of shield tunneling machine

Abstract

The invention relates to the technical field of shield tunneling machines, in particular to a shield tunneling machine negative-ring-free intelligent continuous launching device which comprises a launching frame, a star-shaped compression ring coaxially mounted at the tail of a shield tunneling machine and a traction steel bar, a pressure-bearing chair plate is fixedly arranged on the star-shaped compression ring, one end of the traction steel bar is fixed to the launching frame, and the other end of the traction steel bar is fixed to the launching frame. The other end of the traction steel bar passes through the pressure-bearing chair plate in a penetrating manner; a hollow hydraulic cylinder is arranged outside the traction steel bar; according to the negative-ring-free intelligent continuous starting device for the shield tunneling machine, traction starting is conducted on the shield tunneling machine through cooperation of the star-shaped compression ring, the traction steel bars and other structures, and compared with the mode that reverse thrust is provided through negative-ring pipe pieces in the traditional technology, the negative-ring pipe pieces are omitted, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of shield machines, in particular to a negative-loop-free intelligent continuous starting device for shield machines. Background Art

[0002] The launch of a shield machine is a critical step in shield tunnel construction. It refers to the series of construction processes in which the shield machine breaks ground and advances along the designed axis, starting from the launch pit. The shield machine's propulsion relies on the top thrust of the cylinders, but at the time of launch, the cutterhead has not yet entered the ground and cannot be driven by the reaction force of the soil. Traditionally, the launch device primarily supports the shield machine by installing a reaction frame and negative ring segments. The negative ring segments are temporary segments assembled between the shield tail and the reaction frame at the start of the shield machine. Their function is to transmit the thrust of the shield machine's propulsion cylinders, driving the shield machine forward. Based on the tunnel's designed starting point, the segment ring number is defined as the negative ring toward the launch pit, and the positive ring toward the tunneling direction.

[0003] There are certain defects in the setting of the negative ring segments. After the start is completed, the shield machine needs to be shut down to remove the negative ring. The removal of the negative ring segments takes 7-10 days, and the shield machine is shut down during this period, which affects the working efficiency. In addition, due to the need for a reaction frame, the diameter of the starting well is required to be larger, which increases the construction cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a shield machine negative loop-free intelligent continuous starting device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a shield machine negative ring-free intelligent continuous starting device, comprising a launching frame, a star-shaped compression ring coaxially mounted at the rear of the shield machine, and traction steel bars, wherein a pressure seat plate is fixedly provided on the star-shaped compression ring, one end of the traction steel bar is fixed to the launching frame, and the other end of the traction steel bar is inserted through the pressure seat plate; A hollow hydraulic cylinder is provided on the outside of the traction steel bar, one end of the hollow hydraulic cylinder is detachably fixed to the traction steel bar, and the other end of the hollow hydraulic cylinder is pressed on the pressure-bearing chair plate; by controlling the extension of the hollow hydraulic cylinder, the shield machine is driven to move in the launching direction.

[0006] The outer portion of the traction steel bar is sheathed with a reciprocating detection assembly, which moves back and forth along the axial direction of the traction steel bar to monitor the diameter changes of various parts of the traction steel bar.

[0007] The reciprocating detection assembly includes a detection frame and a driving tube body, and the detection frame and the driving tube body are fixed to each other; The detection frame is fixedly provided with a limit sliding ridge inside, and floating sliders are symmetrically provided inside the detection frame. Two groups of floating sliders symmetrically provided above and below are both slidably installed on the limit sliding ridge, and hard rollers are respectively installed on the two groups of floating sliders symmetrically provided above and below.

[0008] The two groups of hard rollers clamp the traction steel bars between them. Spring covers are symmetrically arranged on the detection frame. Compression springs are respectively arranged in the spring covers. The compression springs apply elastic thrust to the floating slider, so that the floating slider has an elastic tendency to move toward the traction steel bars.

[0009] A laser distance measuring sensor is embedded in the floating slider, which detects the distance between the upper and lower groups of floating sliders. The change in the distance between the upper and lower groups of floating sliders reflects the change in the diameter of the traction steel bar.

[0010] One group of floating sliders is fixedly provided with a limiting side plate, and the limiting side plate is provided with a middle groove; the other group of floating sliders is fixedly provided with a matching side plate, and the matching side plate can be inserted into the middle groove; the traction steel bars are limited by the cooperation between the limiting side plate and the matching side plate.

[0011] The driving tube body is provided with a driving roller, a power module and a fast accumulator. The driving roller is clamped on the outside of the traction steel bar. The rotation of the driving roller drives the driving tube body and the detection frame to move along the axis direction of the traction steel bar. The power module is used to drive the nip roller to rotate; The fast energy accumulator is used to supply power to the power module and control forward and reverse rotation.

[0012] A charging ring is provided at one end of the fast accumulator, through which the fast accumulator can be charged; when the reciprocating detection assembly moves to the end limit position along the axis of the traction steel bar, the charging ring can contact the external contact point to charge and replenish the fast accumulator; An internal spacer is fixedly provided on the inner side of the fast accumulator, the traction steel bar is inserted through the internal spacer, and contact balls are rolled and embedded on the inner surface of the internal spacer. The internal spacer is in rolling contact with the traction steel bar through the contact balls.

[0013] An outer track ring is fixedly provided on the outer surface of the driving tube body, and a counterweight module is slidingly provided on the upper limit of the outer track ring. The counterweight module slides along the outer track ring to change its position, thereby changing the center of gravity of the reciprocating detection assembly, so that the reciprocating detection assembly rotates around the traction steel bar.

[0014] The outer surface of the driving tube body is fixedly provided with a gear ring, and the outer surface of the gear ring is meshed with a driving gear. A reduction motor is fixedly installed inside the counterweight module. The reduction motor drives the driving gear to rotate, and the meshing of the driving gear and the gear ring drives the counterweight module to slide along the outer track ring to change its position. A power supply control guide ring is embedded in the outer surface of the driving tube body, and a telescopic contact shaft capable of elastic expansion and contraction is provided on the reduction motor, and the telescopic contact shaft is in conductive contact with the power supply control guide ring; the fast accumulator supplies power and controls the reduction motor through the cooperation of the power supply control guide ring and the telescopic contact shaft.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The shield machine's negative ring-free intelligent continuous launching device, which uses a star-shaped compression ring and traction steel bars to pull and launch the shield machine, eliminates the need for negative ring segments to provide reverse thrust, thus reducing the launch shaft diameter and construction costs. It also avoids the need to remove the negative ring segments after launching, improving operational efficiency and shortening construction time.

[0016] The present invention can monitor the necking phenomenon of the traction steel bar in real time through the reciprocating detection component. When the traction steel bar is subjected to a large tensile load, if there are defects inside the traction steel bar, necking phenomenon is likely to occur from the defects, the local diameter is reduced, and the length is elongated. If it cannot be discovered in time, there may be a risk of traction steel bar breakage, causing a greater engineering accident. The present invention can greatly improve the starting safety by real-time monitoring through the reciprocating detection component.

[0017] The reciprocating detection assembly of the present invention can adjust the center of gravity of the reciprocating detection assembly through the coordination of the counterweight module, gear ring and reduction motor. The center of gravity adjustment is used to rotate the reciprocating detection assembly, so that the hard roller can achieve detection at more angles when contacting the traction steel bar to realize diameter detection, thereby reducing omissions by changing the angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the reciprocating detection assembly of the present invention.

[0020] Figure 3 This is a structural diagram of the reciprocating detection assembly of the present invention from another angle.

[0021] Figure 4 Schematic diagram of the explosion of the reciprocating detection assembly of the present invention.

[0022] Figure 5 This is a three-dimensional half-section diagram of the reciprocating detection assembly of the present invention.

[0023] Figure 6 This is a transverse three-dimensional half-section diagram of the reciprocating detection assembly of the present invention.

[0024] Figure: 1, launch frame; 2, star-shaped compression ring; 3, pressure seat plate; 4, traction steel bar; 5, hollow hydraulic cylinder; 6, reciprocating detection assembly; 7, detection frame; 8, drive tube; 701, limit sliding edge; 702, floating slider; 703, hard roller; 704, spring plug cover; 705, compression spring; 706, laser ranging sensor; 707, limit side plate; 708, middle groove; 709, matching side plate; 801, drive Dynamic clamping roller; 802, power module; 803, fast accumulator; 804, charging ring; 805, internal spacer; 806, contact ball; 807, outer track ring; 808, counterweight module; 809, gear ring; 810, drive gear; 811, reduction motor; 812, power supply control guide ring; 813, telescopic contact shaft; 101, concrete base; 102, upper diagonal brace; 103, lower bracket; 104, diagonal support assembly. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 6 The present invention provides a technical solution: a shield machine without negative ring intelligent continuous starting device, such as Figure 1 As shown in: it includes a launching frame 1, a star-shaped compression ring 2 coaxially installed at the tail position of the shield machine, and a traction steel bar 4. A pressure seat 3 is fixed on the star-shaped compression ring 2. One end of the traction steel bar 4 is fixed on the launching frame 1, and the other end of the traction steel bar 4 passes through the pressure seat 3. A hollow hydraulic cylinder 5 is provided on the outside of the traction steel bar 4. One end of the hollow hydraulic cylinder 5 is detachably fixed to the traction steel bar 4, and the other end of the hollow hydraulic cylinder 5 is pressed on the pressure seat 3 and fixed to the pressure seat 3. By controlling the extension of the hollow hydraulic cylinder 5, the shield machine is driven to move in the launching direction. Figure 1 As shown in FIG, a total of 14 traction steel bars 4 are provided, with 3 symmetrically arranged in the upper portion and 4 symmetrically arranged in the lower portion. 40% of the thrust load is applied to the upper portion of the star-shaped compression ring 2, and 60% of the thrust load is applied to the lower portion of the star-shaped compression ring 2. The number and position of the traction steel bars 4 correspond one-to-one with the number and position of the hollow hydraulic cylinders 5.

[0027] A reciprocating detection assembly 6 is sheathed around the exterior of the traction bar 4. This reciprocating detection assembly 6 reciprocates along the axis of the traction bar 4 to monitor changes in diameter at various locations on the traction bar 4. The reciprocating detection assembly 6 includes a detection frame 7 and a drive tube 8, which are fixed to each other.

[0028] A limiting sliding ridge 701 is fixedly set inside the detection frame 7, and floating sliders 702 are symmetrically set up in the upper and lower parts of the detection frame 7. Two groups of floating sliders 702 that are symmetrically set up in the upper and lower parts are both slidably installed on the limiting sliding ridge 701. Hard rollers 703 are respectively installed on the two groups of floating sliders 702 that are symmetrical up and down. The hard rollers 703 are made of metal or ceramics, which are hard materials, which reduce the deformation influence of the hard rollers 703 and reduce friction.

[0029] Two sets of hard rollers 703 clamp the traction steel bar 4 between them. Spring plug covers 704 are symmetrically arranged on the detection frame 7. Compression springs 705 are respectively arranged in the spring plug covers 704. The compression springs 705 apply elastic thrust to the floating slider 702, so that the floating slider 702 has an elastic tendency to move toward the traction steel bar 4.

[0030] A laser ranging sensor 706 is embedded in the floating slider 702, which detects the distance between the upper and lower groups of floating sliders 702. The change in the distance between the upper and lower groups of floating sliders 702 reflects the change in the diameter of the traction steel bar 4.

[0031] One set of floating sliders 702 is fixed with a limited side plate 707, and the limited side plate 707 is provided with a middle groove 708; the other set of floating sliders 702 is fixed with a matching side plate 709, and the matching side plate 709 can be inserted into the middle groove 708; the limiting side plate 707 and the matching side plate 709 cooperate to limit the traction steel bar 4, such as Figure 6 As shown in , the limiting side plate 707 and the matching side plate 709 cooperate to limit the two sides of the traction steel bar 4 to prevent the traction steel bar 4 from exceeding the working range of the hard roller shaft 703.

[0032] The driving tube body 8 is provided with a driving roller 801, a power module 802 and a fast accumulator 803. The driving roller 801 is clamped on the outside of the traction steel bar 4. The rotation of the driving roller 801 drives the driving tube body 8 and the detection frame 7 to move along the axis of the traction steel bar 4. The power module 802 is used to drive the driving roller 801 to rotate; the power module 802 is composed of a motor and a reduction gear set, and is connected to the driving roller 801 through an output shaft.

[0033] The fast accumulator 803 is used to supply power and control forward and reverse rotation of the power module 802. The fast accumulator 803 includes a capacitor module, a charge and discharge circuit, and a control circuit. The charge and discharge circuit manages the charge and discharge of the capacitor module, and the control circuit controls the power module 802.

[0034] A charging ring 804 is provided at one end of the fast energy accumulator 803, and the fast energy accumulator 803 can be charged through the charging ring 804; when the reciprocating detection assembly 6 moves to the end limit position along the axial direction of the traction steel bar 4, the charging ring 804 can contact the external contact point to realize the charging and energy replenishment of the fast energy accumulator 803; an internal spacer 805 is fixedly provided on the inner side of the fast energy accumulator 803, and the traction steel bar 4 is inserted through the internal spacer 805. A contact ball 806 is rolled and embedded on the inner surface of the internal spacer 805, and the internal spacer 805 is in rolling contact with the traction steel bar 4 through the contact ball 806.

[0035] An outer track ring 807 is fixedly provided on the outer surface of the driving tube body 8, and a counterweight module 808 is slidingly provided on the upper limit of the outer track ring 807. The counterweight module 808 slides along the outer track ring 807 to change its position, thereby changing the center of gravity of the reciprocating detection assembly 6, so that the reciprocating detection assembly 6 rotates around the traction steel bar 4.

[0036] A gear ring 809 is fixedly provided on the outer surface of the driving tube body 8, and a driving gear 810 is meshed with the outside of the gear ring 809. A reduction motor 811 is fixedly installed inside the counterweight module 808. The driving gear 810 is driven to rotate by the reduction motor 811, and then the driving gear 810 is meshed with the gear ring 809 to drive the counterweight module 808 to slide along the outer track ring 807 to change its position; a power supply control guide ring 812 is embedded on the outer surface of the driving tube body 8, and a telescopic contact shaft 813 that can be elastically extended and retracted is provided on the reduction motor 811, and the telescopic contact shaft 813 is in conductive contact with the power supply control guide ring 812; the fast accumulator 803 supplies power to and controls the reduction motor 811 through the power supply control guide ring 812 and the telescopic contact shaft 813.

[0037] like Figure 1 As shown in FIG, a concrete base 101 is provided at the lower portion of the launch frame 1, and the launch frame 1 is fixed to the concrete base 101 by bolts. An upper diagonal brace 102 and a lower bracket 103 are installed on the launch frame 1, and one end of the traction steel bar 4 is fixed to the launch frame 1 through the corresponding upper diagonal brace 102 and lower bracket 103 respectively.

[0038] A diagonal support assembly 104 is provided on the side of the launching frame 1 facing the shield machine. The other end of the diagonal support assembly 104 is supported on the concrete base 101 , and the launching frame 1 is stably supported by the diagonal support assembly 104 .

[0039] The shield machine without negative ring intelligent continuous starting device of the present invention is as follows when working. Figure 1 As shown in the figure, the hollow hydraulic cylinder 5 is driven to operate by a digital intelligent hydraulic pump station, and the elongation length and pressure of the hollow hydraulic cylinder 5 are precisely controlled. When the hollow hydraulic cylinders 5 are collectively and synchronously extended, one end of the hollow hydraulic cylinder 5 is detachably fixed to the traction steel bar 4, and the other end is pushed on the pressure seat plate 3 and fixed to the pressure seat plate 3. The traction steel bar 4 provides tension, and during the extension process of the hollow hydraulic cylinder 5, the pressure seat plate 3 is pushed and driven to move in the direction of the launch frame 1. Since the pressure seat plate 3 and the star-shaped compression ring 2 are fixed as a whole, the shield machine is driven to move in the launch direction through the star-shaped compression ring 2.

[0040] When the hollow hydraulic cylinder 5 is extended to the limit position, the fixation between the hollow hydraulic cylinder 5 and the traction steel bar 4 is released, and the hollow hydraulic cylinder 5 is controlled to shrink. At this time, the shield machine will not move. One end of the hollow hydraulic cylinder 5 moves relative to the traction steel bar 4. After reaching the new position, one end of the hollow hydraulic cylinder 5 is locked with the traction steel bar 4 again, and the hollow hydraulic cylinder 5 is controlled to extend again. The cycle is repeated until the start of the shield machine is completed.

[0041] In the above process, the reciprocating detection assembly 6 moves back and forth along the axial direction of the traction steel bar 4 to monitor the traction steel bar 4. A set of reciprocating detection assemblies 6 is separately provided on each traction steel bar 4, and there is a one-to-one correspondence between the traction steel bar 4 and the reciprocating detection assembly 6.

[0042] like Figure 5 As shown in the figure, the fast accumulator 803 supplies power to the power module 802, so that the power module 802 drives the driving clamping roller 801 to rotate. Since the driving clamping roller 801 is in frictional contact with the traction steel bar 4, the rotation of the driving clamping roller 801 drives the reciprocating detection component 6 to move along the axial direction of the traction steel bar 4. The movement pattern of the reciprocating detection component 6 is: after reaching the limit position at one end of the traction steel bar 4, it runs in the reverse direction, and circulates back and forth in the process of the traction steel bar 4 being subjected to tension.

[0043] like Figure 5 As shown in , a charging ring 804 is provided on one end face of the fast accumulator 803, and the fast accumulator 803 can be charged through the charging ring 804. At the same time, a charging seat is installed at one end position of the traction steel bar 4. The charging seat is composed of corresponding contacts, which will not be repeated in this application. After the reciprocating detection component 6 moves to the extreme position at one end, the charging ring 804 and the charging seat will be in contact, thereby replenishing and charging the fast accumulator 803. In order to shorten the energy replenishment time, the present application preferably uses a capacitor charging system. A capacitor module is provided inside the fast accumulator 803 for electricity storage. Instantaneous flash charging can be achieved through the capacitor, and the discharge time is controlled to be able to maintain the reciprocating motion of the reciprocating detection component 6 once, and then the next charging and energy replenishment can be carried out.

[0044] The two sets of hard rollers 703 clamp the traction steel bar 4. When the diameter of the traction steel bar 4 changes, for example, when the traction steel bar 4 is necked due to internal defects, the local diameter of the traction steel bar 4 will be reduced. At this time, the two sets of hard rollers 703 are close to each other. Figure 6 As shown in the figure, the two groups of floating sliders 702 move synchronously towards each other, and the distance change between the two groups of floating sliders 702 is monitored in real time by the laser ranging sensor 706. When the distance between the two groups of floating sliders 702 is detected to be reduced, it indicates that a necking problem has occurred and a feedback reminder is given.

[0045] The fast energy accumulator 803 is electrically connected to the power supply control guide ring 812, so that the fast energy accumulator 803 supplies power and controls the reduction motor 811 through the contact between the power supply control guide ring 812 and the telescopic contact shaft 813. When the reduction motor 811 drives the drive gear 810 to rotate, the drive gear 810 and the gear ring 809 engage, causing the counterweight module 808 to adjust its position along the outer track ring 807. When the counterweight module 808 rotates 90 degrees along the outer track ring 807, the overall center of gravity of the reciprocating detection assembly 6 will shift to one side, thereby causing the reciprocating detection assembly 6 to rotate 90 degrees. At this time, the two sets of hard rollers 703 move from the upper and lower sides of the traction steel bar 4 to the left and right sides of the traction steel bar 4, allowing the hard rollers 703 to detect diameters at a wider range of angles when in contact with the traction steel bar 4, thereby reducing omissions through angle changes.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A shield machine negative ring-free intelligent continuous launching device, comprising a launching frame, a star-shaped compression ring coaxially mounted at the rear of the shield machine, and traction steel bars, characterized by: A pressure-bearing seat plate is fixedly provided on the star-shaped compression ring, one end of the traction steel bar is fixed on the launching frame, and the other end of the traction steel bar is inserted through the pressure-bearing seat plate; A hollow hydraulic cylinder is provided on the outside of the traction steel bar, one end of the hollow hydraulic cylinder is detachably fixed to the traction steel bar, and the other end of the hollow hydraulic cylinder is pressed on the pressure-bearing chair plate; by controlling the extension of the hollow hydraulic cylinder, the shield machine is driven to move in the launching direction.

2. The shield machine negative loop-free intelligent continuous starting device according to claim 1, characterized in that: The outer portion of the traction steel bar is sheathed with a reciprocating detection assembly, which moves back and forth along the axial direction of the traction steel bar to monitor the diameter changes of various parts of the traction steel bar.

3. The shield machine negative loop-free intelligent continuous starting device according to claim 2, characterized in that: The reciprocating detection assembly includes a detection frame and a driving tube body, and the detection frame and the driving tube body are fixed to each other; The detection frame is fixedly provided with a limit sliding ridge inside, and floating sliders are symmetrically provided inside the detection frame. Two groups of floating sliders symmetrically provided above and below are both slidably installed on the limit sliding ridge, and hard rollers are respectively installed on the two groups of floating sliders symmetrically provided above and below.

4. The shield machine negative loop-free intelligent continuous starting device according to claim 3, characterized in that: The two groups of hard rollers clamp the traction steel bars between them. Spring covers are symmetrically arranged on the detection frame. Compression springs are respectively arranged in the spring covers. The compression springs apply elastic thrust to the floating slider, so that the floating slider has an elastic tendency to move toward the traction steel bars.

5. The shield machine negative loop-free intelligent continuous starting device according to claim 4, characterized in that: A laser distance measuring sensor is embedded in the floating slider, which detects the distance between the upper and lower groups of floating sliders. The change in the distance between the upper and lower groups of floating sliders reflects the change in the diameter of the traction steel bar.

6. The shield machine negative loop-free intelligent continuous starting device according to claim 5, characterized in that: One group of floating sliders is fixedly provided with a limiting side plate, and the limiting side plate is provided with a middle groove; the other group of floating sliders is fixedly provided with a matching side plate, and the matching side plate can be inserted into the middle groove; the traction steel bars are limited by the cooperation between the limiting side plate and the matching side plate.

7. The shield machine negative loop-free intelligent continuous starting device according to claim 3, characterized in that: The driving tube body is provided with a driving roller, a power module and a fast accumulator. The driving roller is clamped on the outside of the traction steel bar. The rotation of the driving roller drives the driving tube body and the detection frame to move along the axis direction of the traction steel bar. The power module is used to drive the nip roller to rotate; The fast energy accumulator is used to supply power to the power module and control forward and reverse rotation.

8. The shield machine negative loop-free intelligent continuous starting device according to claim 7, characterized in that: A charging ring is provided at one end of the fast accumulator, through which the fast accumulator can be charged; when the reciprocating detection assembly moves to the end limit position along the axis of the traction steel bar, the charging ring can contact the external contact point to charge and replenish the fast accumulator; An internal spacer is fixedly provided on the inner side of the fast accumulator, the traction steel bar is inserted through the internal spacer, and contact balls are rolled and embedded on the inner surface of the internal spacer. The internal spacer is in rolling contact with the traction steel bar through the contact balls.

9. The shield machine negative loop-free intelligent continuous starting device according to claim 7, characterized in that: An outer track ring is fixedly provided on the outer surface of the driving tube body, and a counterweight module is slidingly provided on the upper limit of the outer track ring. The counterweight module slides along the outer track ring to change its position, thereby changing the center of gravity of the reciprocating detection assembly, so that the reciprocating detection assembly rotates around the traction steel bar.

10. The shield machine negative loop-free intelligent continuous starting device according to claim 9, characterized in that: A gear ring is fixedly provided on the outer surface of the driving tube body, and a driving gear is meshed with the outside of the gear ring. A reduction motor is fixedly installed inside the counterweight module. The reduction motor drives the driving gear to rotate, and the driving gear is meshed with the gear ring to drive the counterweight module to slide along the outer track ring to change its position.

11. The shield machine negative loop-free intelligent continuous starting device according to claim 10, characterized in that: A power supply control guide ring is embedded in the outer surface of the driving tube body, and a telescopic contact shaft capable of elastic expansion and contraction is provided on the reduction motor, and the telescopic contact shaft is in conductive contact with the power supply control guide ring; the fast accumulator supplies power and controls the reduction motor through the cooperation of the power supply control guide ring and the telescopic contact shaft.

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