Mobile counterforce frame

Abstract

The application discloses a mobile counterforce frame and belongs to the technical field of counterforce frames of shield machines. The counterforce frame comprises a counterforce frame body. The bottom of the counterforce frame body is provided with a bracket. The two sides of the bottom of the counterforce frame body are provided with rollers. The two sides of the bracket are provided with counterforce frame tracks matched with the rollers. A plurality of positioning holes are uniformly arranged on the bracket. A plurality of sets of positioning devices matched with the positioning holes are arranged on the bottom of one side of the counterforce frame body, so that the counterforce frame body is positioned and fixed during movement. Anti-pulling devices are detachably arranged on the left and right sides of the counterforce frame body. A plurality of arc-shaped negative ring pipe pieces are fixedly connected to one side of the counterforce frame body away from the positioning devices. The negative ring pipe pieces are uniformly arranged around the central axis of the counterforce frame body to form a circular pipe structure. The end of each negative ring pipe piece away from the counterforce frame body is welded with a reference ring block. The reference ring block forms a reference ring of a cylindrical structure around the central axis of the counterforce frame body. The application is stable in positioning and simple in operation.

Description

Technical Field

[0001] This invention belongs to the technical field of shield tunneling machine reaction frames, and more specifically, relates to a mobile reaction frame. Background Technology

[0002] A tunnel boring machine (TBM) is a piece of equipment mainly used for excavating tunnels. When installing a TBM in the launching shaft, a bracket is installed before launching to assist in the installation and positioning of the TBM.

[0003] Currently, brackets are used for both the launch and reception of ultra-large diameter tunnel boring machines (TBMs). The TBM is connected to a mobile reaction frame. The mobile TBM needs to push the mobile reaction frame to move it on the bracket. However, when it moves to the designated position, it is fixed by steel sections. This fixing method is very time-consuming and may damage the structure. If the position of the TBM needs to be adjusted multiple times, the steel sections need to be welded repeatedly, which leads to an extension of the construction period.

[0004] Meanwhile, conventional pull-out resisting devices use a reaction frame welded to the bottom embedded part or the upper crossbeam of the reaction frame welded to the top main structure for diagonal bracing to resist pull-out. The welded structure makes disassembly and assembly time-consuming and laborious, affecting efficiency. Summary of the Invention

[0005] The main objective of this invention is to provide a movable reaction frame to solve the problems mentioned above in the background art.

[0006] According to a first aspect of the present invention, a movable reaction frame is provided, comprising a reaction frame body, a bracket provided at the bottom of the reaction frame body, rollers provided on both sides of the bottom of the reaction frame body, reaction frame tracks provided on both sides of the bracket that cooperate with the rollers, a plurality of evenly distributed positioning holes provided on the bracket, a plurality of positioning devices provided on one side of the bottom of the reaction frame body that cooperate with and are fixed to the positioning holes, so as to position and fix the reaction frame body during movement, and pull-out resisting devices for reinforcing the reaction frame body detachably installed on the left and right sides of the reaction frame body, and a plurality of arc-shaped negative ring tubes fixedly connected to the side of the reaction frame body away from the positioning devices, the plurality of negative ring tubes being evenly distributed around the central axis of the reaction frame body to form a circular tube structure, and a reference ring block welded to the end of each of the plurality of negative ring tubes away from the reaction frame body, the plurality of reference ring blocks forming a cylindrical reference ring around the central axis of the reaction frame body.

[0007] In a specific embodiment of the present invention, the positioning device includes a first positioning device and a second positioning device. The first positioning device includes a first hydraulic cylinder, a second hydraulic cylinder, and a positioning box. The first hydraulic cylinder is horizontally disposed on both sides of the bottom of the reaction frame body, and the telescopic end of the first hydraulic cylinder is connected to one side of the positioning box. The second hydraulic cylinder is vertically disposed on the top of the positioning box, and the telescopic end of the second hydraulic cylinder is fixedly connected to a limit post. The limit post can be movably inserted into the positioning hole. The bottom sides of the positioning box are provided with first pulleys. The second positioning device includes a connecting seat and a third hydraulic cylinder. The third hydraulic cylinder is connected to the bottommost end of the reaction frame body through the connecting seat, and the telescopic end of the third hydraulic cylinder is provided with a third limit post that cooperates with the positioning hole.

[0008] In a specific embodiment of the present invention, the bracket is provided with a first positioning device track connected to the first pulley.

[0009] In a specific embodiment of the present invention, the pull-out resisting device includes a mounting body, which is detachably mounted on the left and right sides of the reaction frame body. A pull-out resisting hydraulic cylinder is fixedly mounted inside the mounting body. A first connecting member is fixedly connected to the telescopic end of the pull-out resisting hydraulic cylinder. The other end of the first connecting member is rotatably connected to a second connecting member via a rotating shaft. A second pulley is rotatably connected to the other end of the second connecting member. A notch is provided at the bottom of the mounting body for the second pulley to extend out.

[0010] In a specific embodiment of the present invention, a U-shaped groove is provided on the mounting body, and a first fixing sleeve is fitted on the outside of the anti-pull-out hydraulic cylinder. The first fixing sleeve has protrusions on both sides that cooperate with the U-shaped groove.

[0011] In a specific embodiment of the present invention, a limiting hole is provided at the bottom of the mounting body, and a first limiting post is provided on the second connector to cooperate with the limiting hole, the first limiting post being inserted into the limiting hole.

[0012] In a specific embodiment of the present invention, the interior of the reference ring block is a hollow structure, and a plurality of first reinforcing plates are evenly distributed inside the reference ring block. First assembly holes are provided on both sides of the reference ring block.

[0013] In a specific embodiment of the present invention, the thickness of the reference ring block is greater than the thickness of the negative ring segment, and one end of the reference ring block protrudes outward from the outer surface of the negative ring segment.

[0014] In a specific embodiment of the present invention, a shield machine housing is fitted around the outer periphery of the negative ring segment, and a fixed seat is provided at the bottom of the shield machine housing. A backlash hydraulic cylinder is detachably installed inside the fixed seat. The telescopic end of the backlash hydraulic cylinder is exposed on the bottom surface of the fixed seat. A second limiting post is fixedly connected to the telescopic end of the backlash hydraulic cylinder. The bracket is provided at the bottom of the fixed seat, and the second limiting post can be inserted into the positioning hole.

[0015] In a specific embodiment of the present invention, the fixed base is provided with a U-shaped groove to facilitate the installation of the anti-reverse hydraulic cylinder, the anti-reverse hydraulic cylinder is fitted with a second fixed sleeve, the top of the second fixed sleeve is provided with a plurality of fixed holes, the anti-reverse hydraulic cylinder is fixedly connected to the fixed holes by bolts, the bottom center of the fixed base is provided with a plurality of assembly holes, and the second fixed sleeve is provided with a connection hole that mates with the assembly holes.

[0016] One of the above-described technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0017] This mobile reaction frame can move back and forth on the reaction frame track via rollers. If it is necessary to fix the reaction frame body, a positioning device needs to be connected with the positioning hole to fix the reaction frame body on the bracket. The reaction frame body is stably positioned and easy to operate, which greatly increases the possibility of completing the project within the time limit. The reaction frame body is detachably installed with an anti-pull device, which abuts against the anti-pull beam fixed to the wall to prevent the reaction frame body from tilting due to the weight of the tunnel boring machine. At the same time, the detachable structure saves time and improves efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the structure of a movable reaction frame in one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the first positioning device in one embodiment of the present invention;

[0021] Figure 3 This is a cross-sectional view of the first positioning device in one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the second positioning device in one embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the anti-pull-out device in one embodiment of the present invention;

[0024] Figure 6This is a cross-sectional view of the anti-pull-out device in one embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of a negative ring segment in one embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a mobile reaction frame without a shield tunneling machine shell in one embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the fixed base and the anti-reverse hydraulic cylinder in one embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of the second fixing sleeve in one embodiment of the present invention. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more features.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components, an indirect connection, or an interaction between two components.

[0034] The following disclosure provides many different implementations or examples for different ways of implementing the present invention.

[0035] Reference Figures 1 to 10 As shown, a movable reaction frame is provided, including a reaction frame body 1. A bracket 2 is provided at the bottom of the reaction frame body 1. Rollers 11 are provided on both sides of the bottom of the reaction frame body 1. Reaction frame tracks 21 that cooperate with the rollers 11 are provided on both sides of the bracket 2. Several evenly distributed positioning holes 22 are provided on the bracket 2. Multiple sets of positioning devices 3 that cooperate with the positioning holes 22 are provided on one side of the bottom of the reaction frame body 1 to fix the reaction frame body 1 in position during movement. Pull-out devices 4 that reinforce the reaction frame body 1 are detachably installed on the left and right sides of the reaction frame body 1. Several arc-shaped negative ring tubes 5 are fixedly connected to the side of the reaction frame body 1 away from the positioning devices 3. Several negative ring tubes 5 are evenly distributed around the central axis of the reaction frame body 1 to form a circular tube structure. A reference ring block 61 is welded to the end of several negative ring tubes 5 away from the reaction frame body 1. Several reference ring blocks 61 form a cylindrical reference ring 6 around the central axis of the reaction frame body 1.

[0036] In this embodiment, the reaction frame body 1 can be moved back and forth on the reaction frame track 21 by the roller 11. If it is necessary to fix the reaction frame body 1, the positioning device 3 needs to be connected with the positioning hole 22 to fix the reaction frame body 1 on the bracket 2. When the reaction frame body 1 is not fixed, its position can be adjusted at will. The positioning is stable and the operation is simple, which greatly improves the possibility of completing the project within the time limit. The pull-out device 4 can be detachably installed on the left and right sides of the reaction frame body 1. This pull-out device 4 can be detached and installed at will without welding. At the same time, it can slide on the slope section to resist pull-out, which is suitable for more application scenarios.

[0037] Several negative ring segments 5 are fixed to one side of the reaction frame body 1 with bolts. Several negative ring segments 5 form a circular tube. A reference ring block 61 is welded to the end of the negative ring segment 5 away from the reaction frame body 1. Multiple reference ring blocks 61 form a reference ring 6. The shield machine shell is sleeved on the outside of the reference ring 6. A jack 10 is fixedly connected to the end of the reference ring block 61 away from the negative ring segment 5. The other end of the jack 10 abuts against the limiting ring inside the shield machine shell. This structure can effectively enhance the overall structural stress, better support the shield machine shell, and improve the appearance.

[0038] In one embodiment of the present invention, the positioning device 3 includes a first positioning device 31 and a second positioning device 32. The first positioning device 31 includes a first hydraulic cylinder 311, a second hydraulic cylinder 312, and a positioning box 313. The first hydraulic cylinder 311 is horizontally arranged on both sides of the bottom of the reaction frame body 1. The telescopic end of the first hydraulic cylinder 311 is connected to one side of the positioning box 313. The second hydraulic cylinder 312 is vertically arranged on the top of the positioning box 313. The telescopic end of the second hydraulic cylinder 312 is fixedly connected to a limit post 314. The limit post 314 can be movably inserted into the positioning hole 22. The bottom sides of the positioning box 313 are provided with first pulleys 315. The second positioning device 32 includes a connecting seat 321 and a third hydraulic cylinder 322. The third hydraulic cylinder 322 is connected to the bottom end of the reaction frame body 1 through the connecting seat 321. The telescopic end of the third hydraulic cylinder 322 is provided with a third limit post that cooperates with the positioning hole 22.

[0039] Furthermore, the bracket 2 is provided with a first positioning device track 316 connected to the first pulley 315.

[0040] In this embodiment, the first positioning device 31 is equipped with two first hydraulic cylinders 311, and their telescopic ends are connected to one side of the positioning box 313. The positioning box 313 is pushed to move, so that the first pulley 315 moves on the track 316 of the first positioning device. When it moves to the designated positioning hole 22, the second hydraulic cylinder 312 is activated, so that the limiting post 314 is inserted into the corresponding positioning hole 22 and fixed. If it is necessary to move the reaction frame body 1 again, the limiting post 314 is retracted before moving. The operation is simple and convenient, and can save a lot of unnecessary time.

[0041] The second positioning device 32 moves with the reaction frame body 1, while the first positioning device 31 can move forward through the first hydraulic cylinder 311 and be inserted into the front positioning hole 22. The second positioning device 32 can make the reaction frame body 1 more secure, or when the first positioning device 31 malfunctions or needs maintenance, the second positioning device 32 can be used in an emergency without delaying the construction progress.

[0042] Preferably, the bracket 2 is symmetrically provided with a first shield machine track 23 and a second shield machine track 24. The first shield machine track 23 is provided on the top two sides of the bracket body 1, and the second shield machine track 24 is provided on the bottom two sides of the bracket 2. The first shield machine track 23 and the second shield machine track 24 provide sliding tracks for the shield machine body to prevent it from being damaged during movement, and at the same time facilitate the movement of the entire device.

[0043] The first shield machine track 23 is equipped with a heightening component 25 to facilitate the tunnel trolley entering the reaction frame body 1. After the reaction frame body 1 moves forward, there is a height difference between the bracket 2 and the wheels of the tunnel trolley. The heightening component 25 fills this gap, and the wheels of the tunnel trolley can travel on the heightening component 25 and finally enter the reaction frame and the tunnel.

[0044] The bracket 2 has several evenly distributed mounting grooves 26. The top of the mounting groove 26 is detachably mounted with a mounting base 27. The middle of the mounting base 27 is detachably mounted with a positioning column 28. The positioning hole 22 is set on the positioning column 28. The bottom of the positioning column 28 is a certain distance from the bottom of the mounting groove 26, which is reserved for the insertion of the limiting column 314 to avoid collision with the bottom of the mounting groove 26 and damage.

[0045] The bracket 2 has a recessed space 29 in the middle for construction, which is reserved for the welder to weld.

[0046] In one embodiment of the present invention, the anti-pull-out device 4 includes a mounting body 41, which is detachably mounted on the left and right sides of the reaction frame body 1. An anti-pull-out hydraulic cylinder 42 is fixedly mounted inside the mounting body 41. A first connecting member 43 is fixedly connected to the telescopic end of the anti-pull-out hydraulic cylinder 42. The other end of the first connecting member 43 is rotatably connected to a second connecting member 46 via a rotating shaft 45. A second pulley 44 is rotatably connected to the other end of the second connecting member 46. A notch 417 for the second pulley 44 to extend is provided at the bottom of the mounting body 41.

[0047] Furthermore, a U-shaped groove 47 is provided on the mounting body 41, and a first fixing sleeve 48 is fitted on the outside of the anti-pull hydraulic cylinder 42. The first fixing sleeve 48 has protrusions 481 on both sides that cooperate with the U-shaped groove 47.

[0048] The bottom of the mounting body 41 has a limiting hole 411, and the second connector 46 is provided with a first limiting post 461 that cooperates with the limiting hole 411. The first limiting post 461 is inserted into the limiting hole 411.

[0049] In this embodiment, the mounting body 41 is detachably mounted on the left and right sides of the reaction frame body 1, and the second pulley 44 is set facing upward. The second pulley 44 can move back and forth on the pull-out beam. By activating the pull-out hydraulic cylinder 42, the second pulley 44 can be moved away from or closer to the pull-out hydraulic cylinder 42, thereby forming a downward pressing force to prevent the reaction frame body 1 from tilting up. This device can be disassembled and installed at will without welding, and it can also slide on slopes to resist pull-out, making it suitable for more application scenarios.

[0050] The outer side of the protruding post 481 is fitted with a pad 49. The pad 49 is respectively set on both sides of the first fixed sleeve 48 by bolts. Since the second pulley 44 is set upward, in order to prevent the anti-pull hydraulic cylinder 42 from falling off naturally, the first fixed sleeve 48 is fixedly connected to the mounting body 41 by the pad 49.

[0051] When the extension end of the anti-pull hydraulic cylinder 42 extends, it drives the first connecting piece 43 to move. Since the limiting hole 411 is connected to the first limiting post 461, the second pulley 44 will move towards the anti-pull hydraulic cylinder 42; conversely, the second pulley 44 will move away from the anti-pull hydraulic cylinder 42.

[0052] Preferably, the mounting body 41 includes two non-adjacent first plates, a second plate, and a third plate. The first, second, and third plates are welded together. A first partition is fixedly connected to the middle of the two first plates, and a second partition is fixedly connected to the middle of the second and third plates. The first and second partitions are arranged perpendicular to each other, dividing the interior of the mounting body 41 into four areas.

[0053] The thickness of the first partition is greater than that of the second partition. The second partition can enhance the internal strength of the mounting body 41 and save costs. The third plate has several evenly distributed second assembly holes for fixing to the two side columns of the reaction frame body 1 with bolts. Several reinforcing ribs are provided between the third plate and the first partition.

[0054] In one embodiment of the present invention, the interior of the reference ring block 61 is a hollow structure, and a plurality of first reinforcing plates 62 are evenly distributed inside the reference ring block 61. First assembly holes 64 are provided on both sides of the reference ring block 61.

[0055] In one embodiment of the present invention, the thickness of the reference ring block 61 is greater than the thickness of the negative ring tube 5, and one end of the reference ring block 61 protrudes outward from the outer surface of the negative ring tube 5.

[0056] In this embodiment, the first reinforcing plate 62 is arranged vertically, and a second reinforcing plate 63 is provided between two adjacent first reinforcing plates 62. The second reinforcing plates 63 are evenly distributed, and a second reinforcing plate 63 is provided for every other first reinforcing plate 62 to strengthen the internal structure of the reference ring block 61. Each reference ring block 61 is fixedly connected to the first assembly hole 64 on two reference ring blocks 61 by bolts, so that each reference ring block 61 is spliced ​​together.

[0057] Preferably, a first connecting seat is welded to one end of the negative ring segment 5 near the reaction frame body 1. The first connecting seat has a first connecting hole, which is fixedly connected to one side of the reaction frame body 1 by bolts. A first reinforcing rib is provided between the first connecting seat and the negative ring segment 5 to improve the overall strength of the structure. Both the negative ring segment 5 and the reference ring block 61 are made of steel. The negative ring segment 5 can be recycled and reused. The maintenance cost is lower than that of segments made of concrete and metal components, and it is not easy to break.

[0058] In one embodiment of the present invention, a shield machine housing is fitted around the outer periphery of the negative ring segment 5. A fixed seat 7 is provided at the bottom of the shield machine housing. A backstop hydraulic cylinder 71 is detachably installed inside the fixed seat 7. The telescopic end of the backstop hydraulic cylinder 71 is exposed on the bottom surface of the fixed seat 7. A second limiting post 72 is fixedly connected to the telescopic end of the backstop hydraulic cylinder 71. A bracket 2 is provided at the bottom of the fixed seat 7. The second limiting post 72 can be inserted into the positioning hole 22.

[0059] Furthermore, the fixed base 7 has a U-shaped groove 73 for easy installation of the anti-reverse hydraulic cylinder 71. The anti-reverse hydraulic cylinder 71 is fitted with a second fixed sleeve 74. The top of the second fixed sleeve 74 has several fixed holes 741. The anti-reverse hydraulic cylinder 71 is fixedly connected to the fixed holes 741 by bolts. The bottom of the fixed base 7 has several assembly holes 77 in the middle position. The second fixed sleeve 74 has a connecting hole 742 that mates with the assembly holes 77.

[0060] In this embodiment, when the tunnel boring machine (TBM) advances into the soil, the water pressure and soil pressure in the stratum will exert a reverse pressure on the TBM. Under normal circumstances, a reaction frame provides a reaction force. However, when the reaction frame needs to be moved forward, it cannot provide a reaction force. Therefore, the anti-reverse hydraulic device is welded to the bottom of the shield tail. The fixed seat 7 is welded to the bottom end of the tail of the TBM shell and an anti-reverse hydraulic cylinder 71 is installed. It is inserted into the positioning hole 22 of the bottom bracket 2 to provide a reaction force and prevent the TBM from retreating during the translation of the reaction frame body 1, which could lead to disasters such as water and sand inrush, surface subsidence and collapse.

[0061] The U-shaped groove 73 facilitates the disassembly and installation of the anti-reverse hydraulic cylinder 71, and the second fixing sleeve 74 is used to fix the anti-reverse hydraulic cylinder 71.

[0062] Preferably, the fixing seat 7 includes a top plate, a bottom plate, and two side plates. The top plate, bottom plate, and two side plates are welded together to form a fixing frame. The width of the top plate is smaller than the width of the bottom plate. One side of each side plate is provided with a first arc surface that mates with the shield machine shell. The shield machine shell is a cylindrical structure. The side plates are not only fixed by welding the top plate and bottom plate, but also have an inclined plate welded to one end of the bottom plate. The inclined plate is also welded to the side plates to strengthen the fixing seat 7.

[0063] The interior of the fixing base 7 is welded with two vertically arranged third partitions, a horizontally arranged fourth partition, and a horizontally arranged fifth partition. The third, fourth, and fifth partitions divide the interior of the fixing base 7 into nine areas. The fourth partition is located above the fifth partition, and the width of the fourth partition is smaller than the width of the fifth partition. Due to the first arc surface of the two side plates, the width of the fourth partition located at the top is smaller than the width of the fifth partition. The lower the area of ​​the nine areas, the larger the space.

[0064] One side of each of the two third partitions is provided with a second arc surface that mates with the shield machine shell. The two third partitions are the same size as the two side plates. A protective sleeve 70 is provided between the second fixing sleeve 74 and the second limiting post 72. Several first through holes are provided on the protective sleeve 70. The bottom of the second fixing sleeve 74 is provided with a second through hole that mates with the first through hole. The first through hole and the second through hole are fixedly connected by bolts, thereby fixing the position of the protective sleeve 70.

[0065] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A movable reaction frame, comprising a reaction frame body (1), characterized in that, The bottom of the reaction frame body (1) is provided with a bracket (2), and rollers (11) are provided on both sides of the bottom of the reaction frame body (1). The sides of the bracket (2) are provided with reaction frame tracks (21) that cooperate with the rollers (11). The bracket (2) is provided with several evenly distributed positioning holes (22). One side of the bottom of the reaction frame body (1) is provided with multiple sets of positioning devices (3) that cooperate with and fix the positioning holes (22) so that the reaction frame body (1) can be positioned and fixed during movement. The left and right sides of the reaction frame body (1) are detachably installed with anti-pull-out devices (4) to reinforce the reaction frame body (1). Several arc-shaped negative ring tubes are fixedly connected to the side of the reaction frame body (1) away from the positioning devices (3). (5) Several negative ring tube segments (5) are evenly distributed around the central axis of the reaction frame body (1) to form a circular tube structure. A reference ring block (61) is welded to one end of each negative ring tube segment (5) away from the reaction frame body (1). The reference ring blocks (61) form a cylindrical reference ring (6) around the central axis of the reaction frame body (1). The positioning device (3) includes a first positioning device (31) and a second positioning device (32). The first positioning device (31) includes a first hydraulic cylinder (311), a second hydraulic cylinder (312), and a positioning box (313). The first hydraulic cylinder (311) is horizontally arranged on both sides of the bottom of the reaction frame body (1). The telescopic end is connected to one side of the positioning box (313). The second hydraulic cylinder (312) is vertically arranged on the top of the positioning box (313). The telescopic end of the second hydraulic cylinder (312) is fixedly connected to a limiting post (314). The limiting post (314) can be movably inserted into the positioning hole (22). The bottom sides of the positioning box (313) are provided with first pulleys (315). The second positioning device (32) includes a connecting seat (321) and a third hydraulic cylinder (322). The third hydraulic cylinder (322) is connected to the bottom end of the reaction frame body (1) through the connecting seat (321). The telescopic end of the third hydraulic cylinder (322) is provided with a third limiting post that cooperates with the positioning hole (22). The bracket (2) A first positioning device track (316) connected to the first pulley (315) is provided on the upper part. The anti-pull device (4) includes an installation body (41). The installation body (41) is detachably installed on the left and right sides of the reaction frame body (1). An anti-pull hydraulic cylinder (42) is fixedly installed inside the installation body (41). A first connecting piece (43) is fixedly connected to the telescopic end of the anti-pull hydraulic cylinder (42). The other end of the first connecting piece (43) is rotatably connected to the second connecting piece (46) through a rotating shaft (45). The other end of the second connecting piece (46) is rotatably connected to the second pulley (44). A notch (417) is opened at the bottom of the installation body (41) for the second pulley (44) to extend.The mounting body (41) has a U-shaped groove (47). A first fixing sleeve (48) is fitted around the outside of the anti-pullback hydraulic cylinder (42). The first fixing sleeve (48) has protrusions (481) on both sides that mate with the U-shaped groove (47). A limiting hole (411) is formed at the bottom of the mounting body (41). A first limiting post (461) is provided on the second connector (46) that mates with the limiting hole (411). The first limiting post (461) is inserted into the limiting hole (411).

2. The movable reaction frame according to claim 1, characterized in that, The interior of the reference ring block (61) is hollow, and several first reinforcing plates (62) are evenly distributed inside the reference ring block (61). First assembly holes (64) are opened on both sides of the reference ring block (61).

3. The movable reaction frame according to claim 1, characterized in that, The thickness of the reference ring block (61) is greater than the thickness of the negative ring tube (5), and one end of the reference ring block (61) protrudes outward from the outer surface of the negative ring tube (5).

4. The movable reaction frame according to claim 1, characterized in that, The outer periphery of the negative ring segment (5) is fitted with a shield machine shell. A fixed seat (7) is provided at the bottom of the shield machine shell. A backstop hydraulic cylinder (71) is detachably installed inside the fixed seat (7). The telescopic end of the backstop hydraulic cylinder (71) is exposed on the bottom surface of the fixed seat (7). A second limiting post (72) is fixedly connected to the telescopic end of the backstop hydraulic cylinder (71). The bracket (2) is provided at the bottom of the fixed seat (7). The second limiting post (72) can be inserted into the positioning hole (22).

5. The movable reaction frame according to claim 4, characterized in that, The fixed base (7) has a U-shaped groove (73) for easy installation of the anti-reverse hydraulic cylinder (71). The anti-reverse hydraulic cylinder (71) is fitted with a second fixed sleeve (74). The top of the second fixed sleeve (74) has several fixed holes (741). The anti-reverse hydraulic cylinder (71) is fixedly connected to the fixed holes (741) by bolts. The bottom of the fixed base (7) has several assembly holes (77). The second fixed sleeve (74) has a connecting hole (742) that mates with the assembly holes (77).

Images