Crawler for square pier column of bridge

Abstract

The invention provides a crawler for a square pier column of a bridge. The crawler comprises an upper hoop and a lower hoop, the upper hoop and the lower hoop are square hoops; a driving device for driving the upper hoop and the lower hoop to move up and down is connected between the upper hoop and the lower hoop; the upper hoop is provided with a platform for bearing a load; the upper hoop and the lower hoop are each provided with a hoop locking device. The hoop locking device can correspondingly lock or loosen the upper hoop or the lower hoop. The bridge square pier stud crawler can adapt to cross section sizes of different square pier studs, and is compact in structure, safe, reliable and convenient to disassemble and assemble.

Description

Technical Field

[0001] The invention relates to the technical field of bridge pier construction, in particular to a bridge square pier column crawler. Background Art

[0002] In bridge design, square piers are a commonly used structural type. The construction of piers is one of the key control nodes of bridge construction. In the prior art, the more common methods of bridge pier construction are hydraulic self-climbing formwork and flip formwork construction.

[0003] Usually, crawlers are needed in the existing pier or bridge construction. For example, the Chinese patent document with patent publication number CN111648238A discloses a crawler. It is mainly used for the installation of prefabricated cap beams. The clamping device is designed with an electric worm gear mechanism. The first platform and the second platform are driven up and down by a lifting member to achieve climbing or descending.

[0004] The crawling device in the above-mentioned document has the following disadvantages:

[0005] 1. The first platform and the second platform have more integral modules, which can be used for the installation of prefabricated cap beams, but cannot meet the requirements of conventional cast-in-place cap beams and pier construction, and the versatility of the equipment is poor.

[0006] 2. The clamping device is designed with an electric worm gear mechanism. Although it avoids the hidden danger of hydraulic oil leakage, the worm gear mechanism is a 90-degree drive mechanism with a large lateral dimension and a non-compact space. In addition, due to the tooth side clearance of the worm gear, its clamping force is not easy to accurately control and maintain.

[0007] 3. There is no integrated anti-fall protection function, and there is a safety hazard of falling from height. Summary of the invention

[0008] In order to solve the problems in the prior art, the present invention provides a bridge square pier crawler which can adapt to different square pier cross-sectional sizes and has a compact structure and is easy to assemble and disassemble.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bridge square pier crawler, comprising an upper hoop and a lower hoop; the upper hoop and the lower hoop are square hoop; a driving device for driving the upper hoop and the lower hoop to move up and down is connected between the upper hoop and the lower hoop; the upper hoop has a platform for bearing the load; the upper hoop and the lower hoop are both equipped with a hoop locking device; the hoop locking device can correspondingly lock or loosen the upper hoop or the lower hoop.

[0010] The crawler of the present invention adopts a box-type square clamp, which has a simple and reliable structure and can realize crawling and material transmission on the opposite pier column bridge.

[0011] According to an optimized technical solution, the square clamp includes four L-shaped boxes and a plurality of connecting components; the four L-shaped boxes are detachably connected to form a square box through the connecting components.

[0012] The square clamp is assembled by L-shaped box, and multiple standard connection components are used in the middle, which can realize standardized production and make the square clamp adapt to square piers of different sizes. By adjusting the number of connection components, the size of the clamp can be adjusted in multiple directions to adapt to square piers of different sizes.

[0013] An optimized technical solution, wherein the connecting component is in the shape of a box, and the connecting component and the L-shaped box are detachably connected via a pin shaft.

[0014] An optimized technical solution, wherein the connecting component is in the shape of a box, and the connecting component and the L-shaped box are detachably connected by bolts.

[0015] The optimized technical solution is that the square hoop includes two U-shaped boxes and multiple connecting components; the two U-shaped boxes are detachably connected to form a square box through the connecting components. The square hoop is assembled with the U-shaped boxes and the connecting components. While ensuring that the hoop has a strong strength, the size can also be adjusted to meet the needs of square bridge piers of different sizes, and the adaptability is strong.

[0016] An optimized technical solution, wherein the clamp locking device is a disc spring locking device; the disc spring locking device comprises a welding ear seat, an installation door frame, an adjusting ear seat, a disc spring cylinder, a clamping block, and a pressure block; the welding ear seat and the installation door frame are respectively fixedly mounted on the direction clamp; the adjusting ear seat is connected to the welding ear seat by a bolt assembly, and the piston end of the disc spring cylinder is rotatably connected to the adjusting ear seat by a pin shaft; a sliding groove is opened in the installation door frame, and an ear shaft is provided at the cylinder end of the disc spring cylinder, and the ear shaft on the cylinder end of the disc spring cylinder can slide horizontally along the sliding groove on the installation door frame; the clamping block is installed on the cylinder end of the disc spring cylinder by the pressure block and bolts, and driven by the disc spring cylinder, the square clamp and the square pier of the bridge can be in a clamped or loosened state. One chamber of the disc spring cylinder is the rod chamber of the cylinder, and the other chamber is the disc spring chamber. The disc spring chamber is integrated with multiple disc springs. The disc spring cylinder can extend and contract by injecting and discharging hydraulic oil. During the extension and contraction process, the clamping block can be pushed out to fit the bridge pier or contracted inward to separate from the bridge pier, thereby realizing the locking and unlocking functions.

[0017] The disc spring cylinder and the clamping block are in spherical contact. Two ball head connection structures are formed between the end of the disc spring cylinder and the clamping block, which can keep the direction of the force transmitted by the disc spring cylinder in a linear transmission direction, ensuring effective contact between the clamping block and the bridge pier.

[0018] The clamping block is also provided with a friction block, which can be made of non-metallic flexible materials such as rubber to protect the bridge pier.

[0019] A plurality of slidable legs are installed at the bottom of the lower clamp, and rollers are installed on the slidable legs.

[0020] The square clamp is also equipped with an anti-fall locking device.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The crawler designed in the present invention is designed as two upper and lower clamps, and the clamps are in a square box structure as a whole, which meets the requirements of tangible bridge pier construction.

[0023] 2. The square hoop adopts a box structure. At the same time, through standard connecting components, the size of the square hoop can be changed by adding or reducing connecting components, so that the crawler of the present invention can adapt to square piers of different specifications, greatly expanding the construction application scope of the crawler.

[0024] 3. The crawler designed by the present invention is designed with multiple pairs of disc spring locking devices, which are mechanically clamped by disc springs, which is safe and reliable.

[0025] 4. The crawler of the present invention is integrated with an anti-fall locking device, which greatly enhances the safety of the crawler. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a bridge square pier crawler in Example 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the exploded structure of the left half-ring assembly and the right half-ring assembly of a bridge square pier crawler in Example 1 of the present invention;

[0028] Figure 3 This is a schematic structural diagram of the left half ring assembly in Example 1 of the present invention;

[0029] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part I;

[0030] Figure 5 This is a schematic diagram of the overall decomposition structure of the left half ring in Example 1 of the present invention;

[0031] Figure 6 This is a schematic diagram of the overall decomposition structure of the right half ring in Example 1 of the present invention;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the L-shaped box;

[0033] Figure 8 It is a schematic diagram of the front view structure of the L-shaped box;

[0034] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure along the AA direction;

[0035] Fig.10 is a schematic diagram of the three-dimensional structure of the connection assembly in Example 1;

[0036] Fig.11 is a schematic top view of the connection assembly in Example 1;

[0037] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure along the middle BB direction;

[0038] Fig.13 It is a schematic diagram of the top view structure of the square clamp;

[0039] Fig.14 It is an exploded schematic diagram of the disc spring locking device;

[0040] Fig.15 It is a partial cross-sectional structural schematic diagram of the disc spring locking device;

[0041] Fig.16 It is a half-section structural schematic diagram of the disc spring locking device;

[0042] Fig.17 It is a schematic diagram of the working process of the disc spring locking device;

[0043] Fig.18 It is a schematic diagram of the structure of the anti-fall locking device;

[0044] Fig.19 It is a schematic diagram of the structure of the overspeed trigger device;

[0045] Fig. 20 Explosion diagram of the roller for overspeed triggering;

[0046] Fig.21 This is a schematic diagram of the working process of the anti-fall locking device;

[0047] Fig. 22 This is a schematic diagram of the structure for installing door frame 2;

[0048] Fig.23 It is a structural schematic diagram of the briquette 2;

[0049] Fig.24 It is a schematic diagram of the connection structure between the disc spring buffer cylinder and the upper wedge block;

[0050] Fig.25 This is a schematic structural diagram of a bridge square pier crawler in Example 2;

[0051] Fig.26 This is a schematic diagram of the exploded structure of the left half-ring assembly and the right half-ring assembly of a bridge square pier crawler in Example 2 of the present invention;

[0052] Fig. 27 This is a schematic structural diagram of the left half ring assembly in Example 2 of the present invention;

[0053] Fig.28 This is a schematic diagram of the overall decomposition structure of the right half ring in Example 2 of the present invention;

[0054] Fig.29 This is a schematic structural diagram of a bridge square pier crawler in Example 3;

[0055] Fig.30 This is a schematic diagram of the exploded structure of the left half-ring assembly and the right half-ring assembly of a bridge square pier crawler in Example 3 of the present invention;

[0056] Fig.31 This is a schematic structural diagram of the left half ring assembly in Example 3 of the present invention;

[0057] Fig.32 Schematic diagram of the overall decomposition structure of the right half ring in Example 3 of the present invention.

[0058] Among them, in the figure:

[0059] 1-crawler assembly; 2-square pier; 3-left half ring assembly; 4-pin shaft 1; 5-right half ring assembly; 6-lifting piece; 7-disc spring locking device; 8-anti-fall locking device; 9-guide rod; 10-guide tube; 11-slidable leg; 3.1-L-type box assembly; 3.2-connection assembly; 3.3-pin shaft 2; 3.1.1-L-type box; 3.1.2-guide wheel; 3.1.1.1-pin hole 1; 3.2.1-connection assembly; 3.2.1.1-adjustment mounting hole; 7.1-adjustment ear seat; 7.2-bolt assembly; 7.3-adjustment gasket; 7. 4-welding ear seat; 7.5-pin shaft; 7.6-disc spring oil cylinder; 7.7-install door frame; 7.8-clamping block; 7.9-friction block; 7.10-pressing block; 7.6.1-disc spring; 7.6.2-cylinder barrel; 7.6.3-piston rod; 7.6.2.1-spherical surface; 7.6.2.2-ear shaft; 7.7.1-sliding groove; 8.1-adjusting ear seat 2; 8.2-bolt assembly 3; 8.3-adjusting gasket 2; 8.4-pin shaft 3; 8.5-disc spring buffer cylinder; 8.6-install door frame 2; 8.6.1-sliding groove 2; 8.6.2-spring installation hook ;8.7-overspeed trigger device;8.8-tension spring 1;8.9-guide plate;8.10-needle bearing;8.11-upper wedge block;8.12-lower wedge block;8.13-friction block 2;8.14-pressure block 2;8.15-welding ear seat 2;8.5.1-piston rod;8.5.2 cylinder;8.5.3-disc spring;8.7.1-mounting seat 1;8.7.2-linear guide;8.7.3-linear slider;8.7.4-split pin;8.7.5-compression spring 1;8.7.6-overspeed trigger roller assembly;8.7.6.1-roller Bracket; 8.7.6.2-roller; 8.7.6.3-sleeve; 8.7.6.4-plastic gasket; 8.7.6.5-screw one; 8.7.6.6-centrifugal block mounting seat; 8.7.6.6.1-convex shaft; 8.7.6.6.2-lining tube; 8.7.6.7-centrifugal block; 8.7.6.8-tension spring two; 8.7.6.9-fastening screw one; 8.7.6.10-ratchet limit block; 8.7.6.10.1-ratchet; 8.7.6.11-fastening screw two; 8.7.6.12-locking nut; 11.1-roller. DETAILED DESCRIPTION

[0060] Example 1

[0061] like Figures 1 to 24As shown, a bridge square pier crawler includes an upper hoop and a lower hoop; the upper hoop and the lower hoop are square hoops; a driving device for driving the upper hoop and the lower hoop to move up and down is connected between the upper hoop and the lower hoop; the driving device is a jacking member 6, which can be a driving device such as a hydraulic cylinder. The upper hoop has a load-bearing platform; the upper hoop and the lower hoop are both equipped with a hoop locking device; the hoop locking device can correspondingly lock or loosen the upper hoop or the lower hoop. The square hoop includes four L-shaped boxes 3.1.1 and multiple connecting components 3.2; the four L-shaped boxes 3.1.1 are detachably connected to form a square box through the connecting component 3.2. The connecting component 3.2 is in the shape of a box as a whole, and the connecting component 3.2 and the L-shaped box 3.1.1 are detachably connected through a pin shaft.

[0062] Specifically, Figure 1 , Figure 2 As shown, the crawler assembly 1 is connected by a left half ring assembly 3 and a right half ring assembly 5 through a pin shaft 4, and can be quickly disassembled and assembled on site.

[0063] like Figure 3 or Figure 4 As shown, the upper and lower half rings of the left half ring assembly 3 are connected into a whole by two L-shaped box assemblies 3.1 through a connecting component 3.2. The upper and lower half rings are guided by a guide mechanism composed of a guide rod 9 and a guide tube 10, and the vertical lifting movement is achieved by the lifting member 6.

[0064] like Figure 3 or Figure 4 As shown, a plurality of slidable legs 11 are fixed to the bottom of the left half ring assembly 3, and rollers 15.1 are installed on the slidable legs, so that the left half ring assembly 3 can slide on the ground relatively easily, which is conducive to shortening the installation time.

[0065] like Figure 5 As shown, the L-shaped box assembly 3.1 of the left half ring assembly and the connecting assembly 3.2 are connected via a second pin 3.3.

[0066] like Figure 6 As shown, the right half ring assembly 5, the left half ring assembly 3, and the connecting assembly 3.2 are connected by a pin 2 3.3. Of course, they can also be equivalent to bolt connections.

[0067] like Figure 7 or Figure 8 or Fig. 9 As shown, the L-shaped box 3.1.1 of the L-shaped box assembly 3.1 is designed to be L-shaped, and pin holes 3.1.1.1 are designed at both ends. The two sides of the L-shaped box 3.1.1 can be integrated with disc spring locking devices 7 and guide wheels 3.1.2.

[0068] like Fig.10or Fig.11 or Fig.12 As shown, the connection component box 3.2.1 of the connection component 3.2 is designed with adjustable mounting holes 3.2.1.1 on both sides. The adjustable mounting holes 3.2.1.1 have multiple sets of hole positions. By adding or removing connection components and adjusting the connection of different hole positions, the crawler can adapt to piers of different specifications and sizes. The anti-fall locking device 8 and the guide wheel 3.1.2 can be integrated on the connection component 3.2, and the disc spring locking device 7 can also be installed.

[0069] like Fig.13 As shown, the exploded view of the top view of the crawler assembly, that is, the upper or lower clamp of the crawler is composed of 4 L-shaped box assemblies 3.1 and 4 connecting components 3.2 connected by pins, and each connecting component 3.2 has an adjustment installation hole 3.2.1.1. With this structure, by adding or reducing the connecting components 3.2 and selecting different installation holes, the crawler can be adjusted in both directions, so that the crawler can adapt to piers of different specifications and sizes.

[0070] like Fig.14 , Fig.15 , Fig.16 or Fig.17 As shown, the disc spring locking device 7 is mainly composed of an adjusting ear seat 7.1, a bolt assembly 2 7.2, an adjusting gasket 7.3, a welding ear seat 7.4, a pin shaft 2 7.5, a disc spring cylinder 7.6, a mounting door frame 7.7, a clamping block 7.8, a friction block 7.9, a pressing block 7.10, etc., wherein the welding ear seat 7.4 and the mounting door frame 7.7 are fixedly connected to the L-shaped box 3.1.1, and the mounting door frame 7.7 is designed with a sliding groove 7.7.1, and the ear shaft 7.6.2.2 of the disc spring cylinder 7.6 can slide horizontally along the sliding groove 7.7.1.

[0071] The disc spring oil cylinder 7.6 is a single-acting disc spring oil cylinder with only one oil inlet. The piston rod 7.6.3 is connected to the adjusting ear seat 7.1 through the pin shaft 7.5, and the adjusting ear seat 7.1 is connected to the welding ear seat 7.4 through the bolt assembly 7.2, that is, in actual operation, the position of the piston rod 7.6.2 and the clamp box body is relatively fixed, and the cylinder 7.6.2 can slide horizontally along the sliding groove 7.7.1 of the door frame 7.7. The tail end of the cylinder 7.6.2 is designed with a spherical surface 7.6.2.1, and a clamping block 7.8 is connected through spherical contact. The clamping block 7.8 is connected as a whole through the pressure block 7.10 and the bolts, and is hung on the tail of the cylinder. The pressure block 7.10 and the cylinder 7.6.2 are clearance-matched, so that the cylinder 7.6.2 and the clamping block 7.8 form a small-angle ball joint connection, which can ensure that the clamping block 7.8 is effectively in contact with the pier column. The clamping block 7.8 is fixed with a friction block 7.9, which can increase the friction coefficient between the clamping block 7.8 and the pier column, thereby improving the vertical suspension capacity of the disc spring locking device 7.

[0072] like Fig.17As shown, when the disc spring cylinder 7.6 is depressurized, the cylinder barrel 7.6.2 is pressed toward the pier column under the action of the disc spring 7.6.1 to achieve clamping. When the disc spring cylinder 7.6 is passed with pressure oil, the cylinder barrel 7.6.2 overcomes the disc spring force and moves to the left under the action of the pressure oil. The cylinder barrel 7.6.2 drives the clamping block 7.8 to separate from the pier column to complete the opening action. The disc spring locking device 7 realizes the mechanical locking function through the disc spring, which is safer and more reliable than hydraulic locking.

[0073] like Fig.18 As shown, the anti-fall locking device 8 is mainly composed of an adjusting ear seat 2 8.1, a bolt assembly 3 8.2, an adjusting gasket 2 8.3, a pin shaft 3 8.4, a disc spring buffer cylinder 8.5, a mounting door frame 2 8.6, an overspeed trigger device 8.7, a tension spring 1 8.8, a guide plate 8.9, a needle bearing 8.10, an upper wedge block 8.11, a lower wedge block 8.12, a friction block 2 8.13, a pressure block 2 8.14, and a welding ear seat 2 8.15.

[0074] The welding ear seat 2 8.15 and the mounting door frame 2 8.6 are fixedly connected to the clamp box body. The mounting door frame 2 is designed with a sliding groove 2 8.6.1. The ear axis of the disc spring buffer cylinder 8.5 can slide horizontally along the sliding groove 2 8.6.1 on the mounting door frame 2 8.15. The disc spring buffer cylinder 8.5 is a purely mechanical disc spring cylinder, which does not pass pressure oil and mainly plays a buffering role. The piston rod 8.5.1 of the disc spring buffer cylinder is connected to the adjustment ear seat 2 8.1 through the pin shaft 3 8.4, and the adjustment ear seat 2 8.1 is fixedly connected to the welding ear seat 2 8.15 through the bolt assembly 3 8.2, that is, in actual operation, the piston rod 8.5.1 of the disc spring buffer cylinder is relatively fixed to the clamp box body, and the cylinder 8.5.2 can slide horizontally along the sliding groove of the mounting door frame 2 8.6. The tail end of the cylinder 8.5.2 is connected with an upper wedge block 8.11 through spherical contact. The upper wedge block 8.11 and the cylinder of the disc spring buffer cylinder 8.5 are connected through a pressure block 8.14. The pressure block 8.14 and the cylinder of the disc spring buffer cylinder 8.5 are clearance-matched, so that the cylinder and the upper wedge block 8.11 form a small-angle ball joint connection, which can ensure good contact between the friction block 8.13 and the pier column and ensure the braking effect.

[0075] like Fig.18 , Fig.19 , Fig. 20 or Fig.21As shown, the upper wedge block 8.11, the lower wedge block 8.12, the second friction block 8.13, the guide plate 8.9, and the needle bearing 8.10 form a wedge self-locking mechanism. The inclined surface of the lower wedge block 8.12 contacts the inclined surface of the upper wedge block 8.11 through the needle bearing 8.10. The lower wedge block 8.12 can slide up and down along the inclined surface and the upper wedge block 8.11 through the guidance of the guide plate 8.10. The lower wedge block 8.12 is fixed with the second friction block 8.13, and contacts the pier column through the second friction block 8.13, so that the friction coefficient of the lower wedge block 8.12 in contact with the pier column is much greater than the friction coefficient of the lower wedge block 8.12 in contact with the upper wedge block 8.11, satisfying the wedge self-locking condition.

[0076] Tension springs 8.8 are connected to both sides of the lower wedge block 8.12, and the other end of the tension spring 8.8 is fixed to the top of the second installation door frame 8.6. When an unexpected weightlessness fall occurs, under the action of the tension spring 8.8, the lower wedge block 8.12 will move relatively to the upper wedge block 8.11, so that the friction block 8.13 contacts the pier column, and the braking and locking functions are realized through the wedge-shaped self-locking mechanism. The disc spring 8.5.3 of the disc spring buffer cylinder 8.5 can play a buffering function. Since the installation door frame 8.6 is designed with a limiter of the lower wedge block 8.12, the maximum braking force during the fall can also be limited, which plays a buffering and protective role.

[0077] like Fig.18 , Fig.19 , Fig. 20 or Fig.21 As shown, in addition to the tension spring 8.8 on both sides of the lower wedge block 8.12, an overspeed trigger device 8.7 is also connected. The tension spring 8.8 is an effective trigger element under severe weightlessness conditions, but when the crawler falls slightly due to weightlessness, there is a safety hazard that the tension spring 8.8 cannot be effectively triggered. Fig.13 , 14 As shown, the upper wedge block 8.11 is connected to the tail of the cylinder barrel of the disc spring buffer cylinder 8.5 through the pressure block 8.14, the tail of the cylinder barrel is designed with a shoulder, the pressure block 8.14 is designed with a flange, the pressure block 8.14 and the upper wedge block 8.11 are fastened by screws, and the pressure block 8.14 and the cylinder barrel maintain a certain gap after installation, so that the upper wedge block 8.11 can rotate around the spherical surface of the tail end of the cylinder barrel at a certain angle to ensure that the lower wedge block 8.12 and the pier are in good contact.

[0078] like Fig. 22 As shown, the installation door frame 8.6 is designed with two slide grooves on the inner side, and the disc spring buffer cylinder 8.5 is placed on the two slide grooves through the tail end ear shaft, which can support and limit the disc spring buffer cylinder 8.5. The installation door frame 8.6 is also designed with two spring installation hooks 8.6.2 for installing the tension spring 8.8 for triggering.

[0079] like Fig.19 As shown, the overspeed trigger device 8.7 is mainly composed of a mounting seat 8.7.1, a linear guide 8.7.2, a linear slider 8.7.3, a cotter pin 8.7.4, a compression spring 8.7.5, an overspeed trigger roller assembly 8.7.6, etc. The mounting seat 8.7.1 can be fixed to the side of the lower wedge block by fasteners, the overspeed trigger roller assembly 8.7.6 is fixed on the linear slider 8.7.3, and the linear guide 8.7.2 is fixed on the mounting seat 8.7.1, so that the overspeed trigger roller assembly 8.7.6 can slide linearly along the linear guide without blocking. The extension rod of the overspeed trigger roller assembly 8.7.6 is sleeved with a compression spring 8.7.5, so that the overspeed trigger roller assembly 8.7.6 can always maintain elastic contact with the pier column, and the cotter pin 8.7.4 is used to limit the position of the overspeed trigger roller assembly 8.7.6 to prevent the linear slider from detaching from the linear guide when there is no pier column.

[0080] like Fig.19 , Fig. 20 As shown, the overspeed trigger roller assembly 8.7.6 is mainly composed of a roller bracket 8.7.6.1, a roller 8.7.6.2, a sleeve 8.7.6.3, a plastic gasket 8.7.6.4, a screw rod 8.7.6.5, a centrifugal block mounting seat 8.7.6.6, a centrifugal block 8.7.6.7, a tension spring 2 8.7.6.8, a fastening screw 1 8.7.6.9, a ratchet limit block 8.7.6.10, a fastening screw 2 8.7.6.11, a lock nut 8.7.6.12, etc. The roller 8.7.6.2 can rotate around the screw rod 8.7.6.5. The roller is fixed with a centrifugal block mounting seat 8.7.6.6. The centrifugal block 8.7.6.7 is mounted on the convex shaft 8.7.6.6.1 on the centrifugal block mounting seat 8.7.6.6. The axial displacement thereof is limited by the screw 8.7.6.9. The centrifugal block can rotate around the convex shaft 8.7.6.6.1. The other end of the centrifugal block is connected with a tension spring 8.7.6.8. The other end of the tension spring 8.7.6.8 is also fixed on the centrifugal block mounting seat. When the roller rotates at a low speed, the centrifugal block 8.7.6.7 is pressed against the liner 8.7.6.6.2 at the center of the centrifugal block mounting seat 8.7.6.6 under the action of the spring 8.7.6.8. At this time, there is rolling friction between the roller 8.7.6.2 and the pier column, and the resistance is small.

[0081] like Fig.19 , Fig. 20As shown, the ratchet limit block 8.7.6.10 is fixed to the mounting seat 1 8.7.6.1 by screw 2 8.7.6.11. The ratchet limit block 8.7.6.10 is designed with a plurality of ratchet teeth 8.7.6.10.1. When a rapid fall occurs, the roller 8.7.6.2 rotates rapidly counterclockwise, and the centrifugal block 8.7.6.7 overcomes the spring force and moves outward under the action of centrifugal force. After colliding with the ratchet teeth 8.7.6.10.1, the roller 8.7.6.2 will stop rotating. At this time, the rolling friction between the roller 8.7.6.2 and the pier will be converted into sliding friction. Under the action of the sliding friction force, the lower wedge block 8.12 will move relatively with the upper wedge block 8.11, thereby triggering the anti-fall locking function.

[0082] like Fig.21 The figure shows the working process of the anti-fall locking device. Under normal working conditions, there is a gap S between the lower wedge block and the pier column, and the crawler can crawl up and down normally; when a severe weightless fall or an overspeed fall occurs, the lower wedge block and the upper wedge block begin to move relatively together; the lower wedge block contacts the pier column, and the anti-fall locking device begins to brake; the lower wedge block moves to the limit position, the disc spring is further compressed, and the disc spring locking device brakes with the maximum braking force, which can be stopped as a whole and locked in position by relying on the wedge self-locking.

[0083] Example 2

[0084] like Fig.25 , Fig.26 , Fig. 27 or Fig.28 As shown, the bridge square pier crawler in this embodiment 2 is similar to the main structure in embodiment 1, the main difference is that the upper hoop or lower hoop of the crawler is no longer composed of four L-shaped boxes, and the square hoop forming the upper hoop or lower hoop includes two U-shaped boxes and multiple connecting components 3.2. The two U-shaped boxes are detachably connected to form a square box through the connecting component, thereby forming the upper hoop or lower hoop of the crawler. The overall size of the structure using the U-shaped box is more compact, lighter in weight, and has better rigidity.

[0085] Example 3

[0086] like Fig.29 , Fig.30 , Fig.31 or Fig.32 As shown, the bridge square pier crawler in Example 3 is similar to the main structure in Example 1, and the main difference is that the connecting component 3.2 and the L-shaped box 3.1.1, as well as the connecting component 3.2, are detachably connected by bolts.

[0087] The above are only preferred application embodiments of the present invention and are not intended to limit the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridge square pier crawler, characterized in that: It comprises an upper clamp and a lower clamp; the upper clamp and the lower clamp are square clamps; a driving device for driving the upper clamp and the lower clamp to move up and down is connected between the upper clamp and the lower clamp; the upper clamp has a platform for bearing the load; the upper clamp and the lower clamp are both equipped with a clamp locking device; the clamp locking device can correspondingly lock or loosen the upper clamp or the lower clamp.

2. A bridge square pier crawler according to claim 1, characterized in that: The square clamp comprises four L-shaped boxes and a plurality of connection components; the four L-shaped boxes are detachably connected to form a square box through the connection components.

3. A bridge square pier crawler according to claim 2, characterized in that: The connecting assembly is box-shaped, and the connecting assembly and the L-shaped box are detachably connected via a pin shaft.

4. A bridge square pier crawler according to claim 2, characterized in that: The connecting assembly is box-shaped, and the connecting assembly and the L-shaped box are detachably connected via bolts.

5. A bridge square pier crawler according to claim 1, characterized in that: The square clamp comprises two U-shaped boxes and a plurality of connection components; the two U-shaped boxes are detachably connected to form a square box through the connection components.

6. A bridge square pier crawler according to claim 1, characterized in that: The clamp locking device is a disc spring locking device; the disc spring locking device includes a welding ear seat, a mounting door frame, an adjusting ear seat, a disc spring cylinder, a clamping block, and a pressure block; the welding ear seat and the mounting door frame are respectively fixedly mounted on the direction clamp; the adjusting ear seat is connected to the welding ear seat by a bolt assembly, and the piston end of the disc spring cylinder is rotatably connected to the adjusting ear seat by a pin shaft; a sliding groove is opened in the mounting door frame, and an ear shaft is provided at the cylinder end of the disc spring cylinder, and the ear shaft on the cylinder end of the disc spring cylinder can slide horizontally along the sliding groove on the mounting door frame; the clamping block is installed on the cylinder end of the disc spring cylinder by the pressure block and bolts, and driven by the disc spring cylinder, the square clamp and the square pier of the bridge can be in a clamped or loosened state.

7. A bridge square pier crawler according to claim 6, characterized in that: There is spherical contact between the disc spring cylinder and the clamping block.

8. A bridge square pier crawler according to claim 7, characterized in that: A friction block is also installed on the clamping block.

9. The bridge square pier crawler according to claim 1, characterized in that: A plurality of slidable legs are installed at the bottom of the lower clamp, and rollers are installed on the slidable legs.

10. The bridge square pier crawler according to claim 1, characterized in that: The square clamp is also equipped with an anti-fall locking device.

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