Shield tail supporting and reinforcing device and method suitable for large-diameter shield synchronous pushing and splicing

Abstract

The invention discloses a shield tail supporting and reinforcing device and method suitable for large-diameter shield synchronous pushing and splicing. The device comprises a shield body; the steel plate bundle has a supporting state and a separating state, the steel plate bundle is movably installed on the inner wall of the shield body to achieve switching between the supporting state and the separating state, and the steel plate bundle in the supporting state is used for making contact with the outer wall of the duct piece and supporting the duct piece; the steel plate bundle in the separated state is separated from the duct piece; the driving assembly is installed on the shield body and used for driving the steel plate bundle to move so as to achieve switching between the supporting state and the separating state. The shield construction continuity and efficiency can be improved, through the design of the steel plate bundles, the steel plate bundles can make contact with the outer wall of the duct piece in the supporting state, higher supporting force is provided, and the stability and safety of the duct piece are ensured. The steel plate bundle has a supporting state and a separating state and can be flexibly switched according to construction requirements, so that the shield tunneling machine can keep the optimal working state in different construction stages.

Description

Technical Field

[0001] The invention relates to the technical field of shield equipment, and in particular to a shield tail support reinforcement device and method suitable for synchronous pushing and assembling of large-diameter shields. Background Art

[0002] At present, shield machines generally adopt the traditional propulsion mode, that is, a linear construction mode of advancing one ring and assembling one ring. This mode generally only requires the installation of 4 shield tail brushes on the shield body, and the rebound force of the shield tail brushes is used to provide support for the pipe segments. However, as the construction of shield machines develops towards faster and better, the traditional propulsion mode can no longer meet the needs. In order to improve construction efficiency, shield machines have gradually begun to adopt the synchronous pushing and splicing function, that is, the shield machine can assemble the pipe segments while excavating. The synchronous pushing and splicing function can realize the continuous construction of the shield machine, and can effectively prevent the blockage of the grouting pipeline and the jamming of the shield body caused by the cessation of the advancement of the assembling pipe segments. In the synchronous pushing and splicing mode, the original 4 shield tail brushes are no longer sufficient to provide the required support for the pipe segments. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A shield tail support reinforcement device suitable for synchronous pushing and assembling of a large-diameter shield comprises: a shield body; a steel plate bundle having a supporting state and a separated state, wherein the steel plate bundle is movably mounted on the inner wall of the shield body to realize switching between the supporting state and the separated state, wherein the steel plate bundle in the supporting state is used to contact with the outer wall of a pipe segment and support the pipe segment; and the steel plate bundle in the separated state is separated from the pipe segment; and a driving assembly mounted on the shield body and used to drive the steel plate bundle to move to realize switching between the supporting state and the separated state.

[0005] Furthermore, the steel plate bundle includes a connecting block and a supporting portion, wherein the supporting portion is used to contact the pipe segment to achieve support; the supporting portion protrudes from the side of the connecting block away from the shield body, and one side of the bottom of the connecting block is hinged to the inner wall of the shield body.

[0006] Furthermore, the driving assembly includes a servo, a rocker and a connecting rod, the servo has a rotatable output shaft, the rotating output shaft is connected to one end of the rocker to drive the rocker and the rotating output shaft to rotate synchronously; the other end of the rocker is hinged to one end of the connecting rod, and the end of the connecting rod away from the rocker is hinged to the connecting block.

[0007] Furthermore, the support portion has a support surface on one side facing the tube segment, and the support surface is used to contact the outer wall of the tube segment.

[0008] Furthermore, the steel plate bundles and driving components are arranged in multiple groups around the inner wall of the shield body.

[0009] Furthermore, it also includes a locking mechanism, which is used to limit the steel plate bundle in the supporting state so that the steel plate bundle remains in the supporting state.

[0010] Furthermore, the locking mechanism includes a telescopic drive mechanism and a limit block. The side of the connecting block has a limit hole. The telescopic drive mechanism has a telescopic rod that can be telescopically moved on the side facing the limit hole. The telescopic rod is connected to the limit block. When in the supporting state, the limit block is aligned with the limit hole and can be inserted into the limit hole under the drive of the telescopic drive mechanism to limit the steel plate bundle in the supporting state.

[0011] Furthermore, the connecting block in the supported state has a gap with the inner wall of the shield body on one side facing the shield body; a sinking groove with a width smaller than the limiting hole is provided at the bottom of the limiting hole; when the limiting block is inserted into the limiting hole on the steel plate bundle in the supported state, the bottom wall of the limiting block fits with the bottom wall of the limiting hole, and there is a gap between the top wall of the limiting block and the top wall of the limiting hole; a through hole is provided on the limiting block, a pressure rod is movably penetrated through the through hole, a pressure head with a diameter larger than the pressure rod is provided at the bottom of the pressure rod, and a compression spring is sleeved on the pressure rod; the upper end of the compression spring abuts against the limiting block, and the lower end abuts against the pressure head; the lower end of the pressure head is used to abut against the bottom wall of the sinking groove to apply an elastic force to the connecting block so that the supporting part is in close contact with the pipe segment.

[0012] Furthermore, the upper end of the pressure rod is connected to a limiting structure, the contour of the limiting structure is larger than the through hole, and when the lower end of the pressure head abuts against the bottom wall of the sinking groove, there is a gap between the limiting structure and the top wall of the limiting block.

[0013] The present invention also provides a shield tail support reinforcement method suitable for synchronous pushing and assembling of large-diameter shield machines, wherein a steel plate bundle and a driving assembly are installed between the bottom of the shield body and the pipe segment, and the driving assembly drives the steel plate bundle to move to a supporting state to achieve support reinforcement for the pipe segment.

[0014] The present invention has the following beneficial effects: This device can improve the continuity and efficiency of shield construction, and greatly shorten the construction period compared with the traditional linear construction mode of advancing one ring and assembling one ring. Through the design of steel plate bundles, this device can contact the outer wall of the segment in a supporting state and provide stronger supporting force to ensure the stability and safety of the segment. The steel plate bundle has a supporting state and a separated state, which can be flexibly switched according to construction needs, so that the shield machine can maintain the best working state in different construction stages.

[0015] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 2 is a schematic diagram of the structure of the pipe segment and the steel plate bundle according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the coordination of the segments, shields and steel plate bundles; Figure 3 is a schematic diagram of the connection structure of the steel plate bundle in the supporting state according to an embodiment of the present invention; Figure 4 yes Figure 3 Schematic diagram of the decomposed state structure; Figure 5 It is a cross-sectional view of the connection structure of the steel plate bundle in the supporting state; Figure 6 yes Figure 5 A magnified view of point A; Figure 7 yes Figure 6 A partial cross-sectional view at BB; Figure 8 is a schematic structural diagram of the steel plate bundle in a separated state; Fig. 9 It is a structural diagram of the locking mechanism; Fig.10 yes Fig. 9 Enlarged view of point C.

[0017] Legend: Shield body 100, pipe segment 101, shield tail brush 102; Steel plate bundle 200, connecting block 210, embedding groove 211, supporting portion 220, supporting surface 221, limiting hole 230, sinking groove 231; Driving assembly 300, steering gear 310, rotary output shaft 311, rocker 320, connecting rod 330; The locking mechanism 400 , the telescopic driving mechanism 410 , the telescopic rod 411 , the limiting block 420 , the through hole 421 , the pressing rod 430 , the pressing head 431 , the pressing spring 440 , the limiting structure 450 , and the cross bar 460 . DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] Please refer to Figure 1 and Figure 2 In a preferred embodiment of the present invention, a shield tail support reinforcement device suitable for synchronous pushing and assembling of a large-diameter shield machine is provided, comprising a shield body 100, a steel plate bundle 200 and a drive assembly 300.

[0023] The shield body 100 is annular as a whole. Figure 1 As shown, a shield tail brush 102 is installed on the shield body, and the rebound force of the shield tail brush is used to provide auxiliary support for the pipe segment 101. The steel plate bundle 200 has a supporting state and a separated state. The steel plate bundle 200 is movably installed on the inner wall of the shield body 100 to achieve the switching between the supporting state and the separated state. Figure 5 As shown, the steel plate bundle 200 in the supporting state is used to contact the outer wall of the pipe segment 101 and support the pipe segment 101. Figure 8 As shown, the steel plate bundle 200 in the separated state is separated from the pipe segment 101, thereby reducing the resistance when relative movement occurs with the pipe segment 101.

[0024] The driving assembly 300 is installed on the shield body 100 and is used to drive the steel plate bundle 200 to move so as to switch between the supporting state and the separated state.

[0025] The present invention provides a shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shields, which can improve the continuity and efficiency of shield construction. Compared with the traditional linear construction mode of pushing one ring and assembling one ring, the construction period is greatly shortened; the present invention adds a steel plate bundle on the basis of the original shield tail brush of the shield machine, and the number of lanes, layout angle and layout gap of the steel plate bundle can be adjusted according to the working conditions. Through the design of the steel plate bundle 200, the device can contact the outer wall of the pipe segment 101 in the supporting state and provide stronger supporting force to ensure the stability and safety of the pipe segment 101. The steel plate bundle 200 has a supporting state and a separated state, which can be flexibly switched according to construction needs, so that the shield machine can maintain the best working state in different construction stages.

[0026] Reference Figure 3 In some embodiments of the present invention, the steel plate bundle 200 includes a connection block 210 and a support portion 220, wherein the support portion 220 is used to contact the pipe segment 101 to achieve support; the support portion 220 protrudes from the side of the connection block 210 away from the shield body 100, so that the support portion 220 and the connection block 210 form an obtuse angle, and when the support portion 220 contacts the pipe segment 101, the connection block 210 is close to the shield body 100, so as to facilitate connection with the driving assembly 300 on the inner wall of the shield body 100. One side of the bottom of the connection block 210 is hinged to the inner wall of the shield body 100, so as to achieve rotational activity to achieve state switching.

[0027] Reference Figure 3 and Figure 4 In a further embodiment of the present invention, the driving assembly 300 includes a steering gear 310, a rocking arm 320 and a connecting rod 330. The steering gear 310 has a rotating output shaft 311 that can rotate. The rotating output shaft 311 is connected to one end of the rocking arm 320 to drive the rocking arm 320 to rotate synchronously with the rotating output shaft 311. The other end of the rocking arm 320 is hinged to one end of the connecting rod 330. The end of the connecting rod 330 away from the rocking arm 320 is hinged to the connecting block 210. The connecting block 210 is provided with an embedding groove 211 for the connecting rod 330 to be embedded. The side wall of the embedding groove and the connecting rod 330 are provided with corresponding holes to realize the hinge connection through the hinge shaft. Through the transmission of the rocking arm 320 and the connecting rod 330, the steel plate bundle 200 can be driven to rotate around the hinge with the shield body 100.

[0028] Reference Figure 4 and Figure 5 In a further embodiment of the present invention, the support portion 220 has a support surface 221 on the side facing the tube segment 101, and the support surface 221 is used to contact the outer wall of the tube segment 101, thereby achieving surface contact, increasing the contact area, avoiding stress concentration, and improving support stability.

[0029] Reference Figure 1 and Figure 2In a further embodiment of the present invention, the steel plate bundle 200 and the drive assembly 300 are arranged in multiple groups around the inner wall of the shield body 100, so as to achieve multi-position and multi-group support, improve the support force and support stability. Of course, it can be understood that the steel plate bundle 200 and the drive assembly 300 are arranged around the bottom area of ​​the shield body 100.

[0030] Reference Figure 3 and Figure 5 In a further embodiment of the present invention, a locking mechanism 400 is further included, and the locking mechanism 400 is used to limit the steel plate bundle 200 in the supporting state to keep the steel plate bundle 200 in the supporting state, so that after the driving component 300 drives the steel plate bundle 200 to switch to the supporting state, the driving component 300 may not work, and the locking mechanism 400 is used to keep the steel plate bundle 200 in the supporting state, and the force applied to the steel plate bundle 200 will not be fully transmitted to the driving component 300, thereby avoiding damage to the driving component 300 due to a large force applied to the driving component 300 in an idle state for a long time, thereby improving the life of the equipment.

[0031] Reference Figure 3 and Figure 5 In a further embodiment of the present invention, the locking mechanism 400 includes a telescopic driving mechanism 410 and a limiting block 420. The side of the connecting block 210 has a limiting hole 230. The telescopic driving mechanism 410 has a telescopic rod 411 that can be telescopically movable on the side facing the limiting hole 230. The telescopic driving mechanism 410 can be a hydraulic cylinder, a telescopic motor, etc., which can drive the telescopic rod 411 to telescope. The telescopic rod 411 is connected to the limiting block 420 to drive the limiting block 420 to telescope. In the supporting state, the limiting block 420 is aligned with the limiting hole 230 and can be inserted into the limiting hole 230 under the drive of the telescopic driving mechanism 410 to limit the steel plate bundle 200 in the supporting state, so that the steel plate bundle 200 is kept in the supporting state to achieve stable support. When unlocking is required, the telescopic driving mechanism 410 only needs to drive the limiting block 420 to withdraw from the limiting hole 230, and locking and unlocking can be automatically achieved.

[0032] Reference Figure 6 , Figure 7 , Fig. 9 and Fig.10 In a further embodiment of the present invention, a sinking groove 231 with a width smaller than that of the limiting hole 230 is provided at the bottom of the limiting hole 230. When the limiting block 420 is inserted into the limiting hole 230 on the steel plate bundle 200 in the supporting state, the bottom wall of the limiting block 420 fits with the bottom wall of the limiting hole 230, so that the connecting block 210 cannot rotate upward, that is, the supporting part 220 will not move in the direction of being out of contact with the pipe segment 101, thereby achieving stable support. Figure 6As shown, there is a gap between the top wall of the limiting block 420 and the top wall of the limiting hole 230 , and there is a gap between the side of the connecting block 210 in the supporting state facing the shield body 100 and the inner wall of the shield body 100 . The limit block 420 is provided with a through hole 421, and a pressure rod 430 is movably penetrated through the through hole 421, and the diameter of the pressure rod 430 is adapted to the through hole 421. A pressure head 431 with a diameter larger than that of the pressure rod 430 is provided at the bottom of the pressure rod 430, and the contour of the pressure head 431 is larger than that of the through hole 421. A compression spring 440 is sleeved on the pressure rod 430; the upper end of the compression spring 440 abuts against the limit block 420, and the lower end abuts against the pressure head 431, so as to apply a downward elastic force to the pressure rod 430; when the limit block 420 is embedded in the limit hole 230 in the supporting state, the lower end of the pressure head 431 abuts against the bottom wall of the sinking groove 231, so as to apply an elastic force to the connecting block 210, so that the support part 220 is in close contact with the pipe segment 101. There is a gap between the top wall of the limiting block 420 and the top wall of the limiting hole 230, and there is a gap between the side of the connecting block 210 in the supporting state facing the shield body 100 and the inner wall of the shield body 100, so that the connecting block 210 has space to further move toward the shield body 100, and when the connecting block 210 further moves toward the shield body 100, the supporting part 220 will be tightly attached to the pipe segment 101, and then the compression spring 440 and the pressure head 431 are used to apply an elastic effect to the connecting block 210 so that the connecting block 210 has a tendency to further move toward the shield body 100, so that the supporting part 220 is tightly attached to the pipe segment 101, and a certain elastic pre-tightening effect is achieved.

[0033] Reference Figure 6 , Figure 7 , Fig. 9 and Fig.10 In a further embodiment of the present invention, the upper end of the pressure rod 430 is connected to a limiting structure 450, and the contour of the limiting structure 450 is larger than the perforation 421. When the lower end of the pressure head 431 abuts against the bottom wall of the sinking groove 231, there is a gap between the limiting structure 450 and the top wall of the limiting block 420, thereby preventing the force of the compression spring 440 from being transmitted to the limiting block 420 through the limiting structure 450, so that the force is not fully applied to the connecting block 210, thereby making the compression spring 440 lose its function. The limiting structure 450 can be a nut threadedly connected to the upper end of the pressure rod 430. It can be understood that in order for the limiting block 420 to be smoothly embedded in the limiting hole 230 and the pressure head 431 to be smoothly embedded in the sinking groove 231, the end of the limiting block 420 and the bottom of the pressure head 431 are provided with chamfers, and the bottom edge of the sinking groove 231 can also be provided with chamfers.

[0034] Reference Fig. 9 There are multiple limit blocks 420 arranged horizontally, and the multiple limit blocks 420 are connected in series through a cross bar 460. The cross bar 460 and the telescopic rod 411 can be connected and fixed by fasteners.

[0035] The present invention also provides a shield tail support reinforcement method suitable for synchronous pushing and assembling of large-diameter shield machines. A steel plate bundle 200 and a drive assembly 300 are installed between the bottom of the shield body 100 and the pipe segment 101. The drive assembly 300 drives the steel plate bundle 200 to move to a supporting state to achieve support and reinforcement of the pipe segment 101.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines, characterized in that: include: Shield(100); The steel plate bundle (200) has a supporting state and a separated state. The steel plate bundle (200) is movably mounted on the inner wall of the shield body (100) to achieve switching between the supporting state and the separated state. The steel plate bundle (200) in the supporting state is used to contact the outer wall of the pipe segment (101) and support the pipe segment (101); the steel plate bundle (200) in the separated state is separated from the pipe segment (101); The driving assembly (300) is mounted on the shield body (100) and is used to drive the steel plate bundle (200) to move so as to switch between a supporting state and a separated state.

2. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 1 is characterized in that: The steel plate bundle (200) comprises a connecting block (210) and a supporting portion (220), wherein the supporting portion (220) is used to contact the pipe segment (101) to achieve support; the supporting portion (220) protrudes from a side of the connecting block (210) facing away from the shield body (100), and a bottom side of the connecting block (210) is hinged to an inner wall of the shield body (100).

3. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 2 is characterized in that: The driving assembly (300) comprises a steering gear (310), a rocking arm (320) and a connecting rod (330); the steering gear (310) has a rotatable rotating output shaft (311); the rotating output shaft (311) is connected to one end of the rocking arm (320) to drive the rocking arm (320) and the rotating output shaft (311) to rotate synchronously; the other end of the rocking arm (320) is hinged to one end of the connecting rod (330); and one end of the connecting rod (330) away from the rocking arm (320) is hinged to the connecting block (210).

4. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 2 is characterized in that: The support portion (220) has a support surface (221) on one side facing the tube segment (101), and the support surface (221) is used to contact the outer wall of the tube segment (101).

5. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 1 is characterized in that: The steel plate bundles (200) and the drive components (300) are arranged in multiple groups around the inner wall of the shield body (100).

6. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 2 is characterized in that: It also includes a locking mechanism (400), wherein the locking mechanism (400) is used to limit the position of the steel plate bundle (200) in the supporting state, so that the steel plate bundle (200) remains in the supporting state.

7. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 6 is characterized in that: The locking mechanism (400) comprises a telescopic drive mechanism (410) and a limit block (420); a side of the connection block (210) is provided with a limit hole (230); a side of the telescopic drive mechanism (410) facing the limit hole (230) is provided with a telescopic rod (411) that is telescopically movable; the telescopic rod (411) is connected to the limit block (420); in a supported state, the limit block (420) is aligned with the limit hole (230) and can be inserted into the limit hole (230) under the drive of the telescopic drive mechanism (410) to limit the steel plate bundle (200) in the supported state.

8. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 7 is characterized in that: The side of the connecting block (210) in the supporting state facing the shield body (100) has a gap with the inner wall of the shield body (100); the bottom of the limiting hole (230) is provided with a sinking groove (231) whose width is smaller than that of the limiting hole (230); when the limiting block (420) is inserted into the limiting hole (230) on the steel plate bundle (200) in the supporting state, the bottom wall of the limiting block (420) is in contact with the bottom wall of the limiting hole (230); the top wall of the limiting block (420) has a gap with the top wall of the limiting hole (230); and the limiting block (420) is provided with a through hole ( 421), a pressure rod (430) is movably inserted into the through hole (421), a pressure head (431) having a diameter larger than that of the pressure rod (430) is provided at the bottom of the pressure rod (430), and a pressure spring (440) is sleeved on the pressure rod (430); the upper end of the pressure spring (440) abuts against the limit block (420), and the lower end abuts against the pressure head (431); the lower end of the pressure head (431) is used to abut against the bottom wall of the sinking groove (231) to apply an elastic force to the connection block (210), so that the support portion (220) and the pipe segment (101) are in close contact.

9. The shield tail support reinforcement device suitable for synchronous pushing and assembling of large-diameter shield machines according to claim 8 is characterized in that: The upper end of the pressure rod (430) is connected to a limiting structure (450), the contour of the limiting structure (450) is larger than the perforation (421), and when the lower end of the pressure head (431) abuts against the bottom wall of the sinking groove (231), a gap exists between the limiting structure (450) and the top wall of the limiting block (420).

10. A method for strengthening the tail support of a large-diameter shield machine for synchronous assembly, based on the tail support strengthening device according to any one of claims 1 to 9, characterized in that: A steel plate bundle (200) and a driving assembly (300) are installed between the bottom of the shield body (100) and the pipe segment (101), and the driving assembly (300) drives the steel plate bundle (200) to move to a supporting state, so as to achieve support and reinforcement of the pipe segment (101).

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