Guide-beam-free incremental launching construction hoisting balance weight structure for bridge construction

Abstract

The invention relates to the technical field of bridge construction, and discloses a guide-beam-free incremental launching construction hoisting balance weight structure for bridge construction, which comprises an incremental launching platform and a gantry crane above the incremental launching platform, the counterweight assembly comprises two slide rails, two wheel carriers, two groups of rollers, a base, a plurality of counterweight blocks, two groups of guide wheels and two pull ropes; and the lubricating assembly is used for lubricating the two groups of rollers. Through the arrangement of the counterweight assembly, the base can move reversely along with the movement of the gantry crane, self-adaptive position adjustment of the multiple counterweight blocks is achieved, the gantry crane and the multiple counterweight blocks are kept in a balanced state on the pushing platform, the bending moment and the shearing force peak value of the pushing platform are reduced, and through the self-adaptive position adjustment, the service life of the pushing platform is prolonged. And the operation of actively adjusting the position of the balancing weight by an operator is reduced, and the operation time is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly relates to a balanced counterweight structure for hoisting during non-guide-beam incremental launching construction of bridges. Background Art

[0002] In bridge construction, the non-guide-beam incremental launching construction method is to build a launching platform behind the abutment or temporarily erect it. The beam body is precast in segments, connected into a whole with longitudinal prestressed tendons, and the beam body is gradually pushed to the designed position by applying force with equipment such as horizontal jacks. During construction, first, site preparation is carried out and the incremental launching equipment is debugged. Then, the beam body segments are precast with high precision on the launching platform, various ducts are reserved and embedded parts are installed. Workers, with the assistance of gantry cranes, precast the beam body segments according to requirements, reserve ducts and install embedded parts. After that, slideway beams, jacks and reaction seats are installed on piers, abutments, etc. by gantry cranes. When everything is ready, the jacks are started to push the beam body segment by segment. For each segment pushed, the gantry crane is used to assist in completing the prestress tensioning to connect the beam body. The beam body is temporarily fixed at the pier. After reaching the designed position, the fixation is removed and the system conversion is completed. Finally, the gantry crane is used to hoist materials to carry out the construction of auxiliary facilities. During non-guide-beam incremental launching construction, since the gantry crane needs to move back and forth on the launching platform, the gantry crane will generate certain dynamic loads and vibrations on the beam body when moving back and forth on the launching platform. By laying counterweight blocks, the bending moment and shear force generated by the beam body during the incremental launching process can be balanced.

[0003] However, in the prior art, there are the following problems:

[0004] The existing counterweight blocks are usually placed in a fixed manner in multiple areas on the launching platform to adjust the stress state of the launching platform. However, since the position of the gantry crane will constantly change during operation, the balanced effect of the fixed counterweight blocks on the launching platform is limited. When the gantry crane needs to hoist heavy objects, operators also need to actively adjust the positions of multiple counterweight blocks, which takes up some operation time and thus affects the operation efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a balanced counterweight structure for hoisting during non-guide-beam incremental launching construction of bridges, aiming to overcome the defect that the balanced effect of the fixed counterweight blocks on the launching platform in the prior art is limited, as described in detail below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A lifting balanced counterweight structure for incremental launching construction of bridges provided by the present invention includes an incremental launching platform and a gantry crane above it. A counterweight assembly is arranged on the incremental launching platform for adaptively adjusting the counterweight area. The counterweight assembly includes two slide rails, two wheel frames, two groups of rollers, a base, a plurality of counterweight blocks, two groups of guide wheels and two pull ropes. The two slide rails are both installed on the incremental launching platform. The two groups of rollers are respectively rotatably installed in the two wheel frames. The two groups of rollers are respectively in rolling connection with the two slide rails. The base is connected to the top surfaces of the two wheel frames. The plurality of counterweight blocks are stacked on the base. A lubrication assembly is further included for lubricating the two groups of rollers.

[0008] Preferably, one group of the guide wheels is provided with four guide wheels. The four guide wheels in the same group are arranged in a rectangle. The two pull ropes are respectively sleeved on the two groups of guide wheels. The gantry crane includes two traveling devices. The two ends of the two pull ropes are respectively connected to the two sides of the two traveling devices. The two pull ropes are both fixedly connected through the base.

[0009] Preferably, the counterweight assembly further includes four corner brackets. The four corner brackets are all connected to the base. The four corner brackets are respectively in sliding contact with the four corners of the plurality of counterweight blocks.

[0010] Preferably, one of the guide wheels in one group of the guide wheels is connected with a cam at the top. One end of the connecting rod is hinged to the top of the cam. The other end of the connecting rod away from the cam is hinged to an annular brush. The bottom of the annular brush is in sliding connection with a slide plate.

[0011] Preferably, the slide plate is connected to the incremental launching platform. The two annular brushes are respectively in sliding contact with the outer walls of the two pull ropes.

[0012] Preferably, the lubrication assembly includes four scraping blades. The four scraping blades are respectively connected to the two ends of the two wheel frames. The bottom surface of the wheel frame is in sliding connection with the top surface of the slide rail. The scraping blade is in sliding connection with the top surface of the slide rail.

[0013] Preferably, the lubrication assembly further includes an oil tank, two first oil pipes, two second oil pipes, two turntables, two chute frames, a movable frame, a slide rod and a piston. The oil tank is connected to the bottom surface of the base. The two first oil pipes and the two second oil pipes are both connected to the oil tank. The ends of the two first oil pipes away from the oil tank are respectively connected to the left ends of the two wheel frames. The ends of the two second oil pipes away from the oil tank are respectively connected to the right ends of the two wheel frames. The movable frame is in sliding connection with the bottom surface of the base. The two chute frames are respectively connected to the two ends of the movable frame. The slide rod is connected to the movable frame. One end of the slide rod away from the movable frame is connected with a piston.

[0014] Preferably, the roller includes a wheel axle which penetrates through the wheel frame. A plurality of the rollers are provided in a group. Two turntables are respectively connected to the rotating shafts of one of the rollers in two groups of rollers. A chute is provided on the chute frame. The two turntables are respectively slidably connected to the chute of the two chute frames through bearings. The sliding rod is slidably connected through the oil tank. The piston is slidably connected to the inner wall of the oil tank. Check valves are respectively arranged in the first oil pipe and the second oil pipe.

[0015] Preferably, the lubrication assembly further includes a plurality of ball screws and a plurality of rotating rods. The plurality of ball screws are all connected to the piston. The plurality of rotating rods are all rotatably connected to the inner wall of the oil tank. The plurality of rotating rods are respectively threadedly connected to the plurality of ball screws through balls. A plurality of paddles are connected to the outer wall of the rotating rod.

[0016] The beneficial effects are as follows:

[0017] 1. For the balanced counterweight structure for non-guide beam jacking construction hoisting in bridge construction, through the setting of the counterweight assembly, the base can move in the reverse direction following the movement of the gantry crane, realizing the adaptive position adjustment of multiple counterweight blocks, keeping the gantry crane and multiple counterweight blocks in a relatively balanced state on the jacking platform, reducing the peak values of bending moment and shear force of the jacking platform, improving the stability and safety of the jacking platform. Through the adaptive position adjustment, the operation of the operator to actively adjust the position of the counterweight blocks is reduced, saving the operation time; through the setting of two annular brushes, the two annular brushes can clean the two pulling ropes by reciprocating movement, keeping the cleanliness of the surface of the pulling ropes and reducing the friction between the pulling ropes and the guide wheels.

[0018] 2. For the balanced counterweight structure for non-guide beam jacking construction hoisting in bridge construction, through the setting of the lubrication assembly, a sealed space can be formed between the two wheel frames and the two slide rails. By injecting grease into the wheel frame, the lubrication effect can be continuously maintained, reducing the friction between the rollers and the slide rails, thereby improving the smoothness of the base movement; through the setting of the oil tank, when the base moves, the grease between the oil tank and the two wheel frames can automatically circulate, enabling a part of the grease to leave the wheel frame for heat dissipation, avoiding overheating of the grease, and thus prolonging the service life of the grease; through the setting of a plurality of rotating rods, the plurality of rotating rods drive the plurality of paddles to stir the grease in the oil tank, keeping the uniformity of the grease, and thus ensuring the lubrication effect. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the counterweight assembly of the present invention;

[0022] Figure 3 It is a schematic diagram of the base structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the pull rope structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the annular brush of the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the lubrication assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the wheel frame structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the scraper structure of the present invention;

[0028] Figure 9 It is a schematic diagram of the movable frame structure of the present invention;

[0029] Figure 10 It is a schematic diagram of the oil tank structure of the present invention;

[0030] Figure 11 It is a schematic diagram of the rotating rod structure of the present invention.

[0031] The accompanying drawings are marked with reference numerals as follows: 1. Pushing platform; 2. Gantry crane; 21. Walking device; 3. Counterweight assembly; 31. Slide rail; 32. Wheel frame; 33. Roller; 34. Base; 35. Angle bracket; 36. Counterweight block; 37. Guide wheel; 38. Pull rope; 39. Cam; 310. Connecting rod; 311. Slide plate; 312. Annular brush; 4. Lubrication assembly; 41. Oil tank; 42. First oil pipe; 43. Second oil pipe; 44. Scraper; 45. Turntable; 46. Slide frame; 47. Movable frame; 48. Slide rod; 49. Piston; 410. Ball screw; 411. Turntable; 412. Paddle. DETAILED DESCRIPTION

[0032] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0033] Example 1

[0034] Please refer to Figure 1 - Figure 5 , a balanced counterweight structure for hoisting during incremental launching construction of a bridge without a guide beam, comprising an incremental launching platform 1 and a gantry crane 2 above it. A counterweight assembly 3 is arranged on the incremental launching platform 1 for adaptively adjusting the counterweight area. The counterweight assembly 3 includes two slide rails 31, two wheel frames 32, two groups of rollers 33, a base 34, a plurality of counterweight blocks 36, two groups of guide wheels 37, and two pulling ropes 38. The two slide rails 31 are both installed on the incremental launching platform 1. The two groups of rollers 33 are respectively rotatably installed in the two wheel frames 32. The two groups of rollers 33 are respectively in rolling connection with the two slide rails 31. The base 34 is connected to the top surfaces of the two wheel frames 32. The plurality of counterweight blocks 36 are stacked on the base 34. The two wheel frames 32 can drive the base 34 and the counterweight blocks 36 above it to move left and right. One group of guide wheels 37 is set to four. The four guide wheels 37 in the same group are arranged in a rectangle. The two pulling ropes 38 are respectively sleeved on the two groups of guide wheels 37. The gantry crane 2 includes two traveling devices 21. The gantry crane 2 is driven by the two traveling devices 21 to move left and right on the incremental launching platform 1. The two ends of the two pulling ropes 38 are respectively connected to the two sides of the two traveling devices 21. The two pulling ropes 38 are both fixedly connected through the base 34. When the gantry crane 2 moves, the base 34 can drive the plurality of counterweight blocks 36 to move in the direction opposite to the moving direction of the gantry crane 2, so as to adjust the stress state of the incremental launching platform 1, adjust the overall center of gravity of the incremental launching platform 1, and avoid large deformation of the incremental launching platform 1 when the gantry crane 2 hoists at a position far from the center of the incremental launching platform 1. Through the setting of the counterweight assembly 3, the base 34 can move in the reverse direction following the movement of the gantry crane 2, realizing the adaptive position adjustment of the plurality of counterweight blocks 36, keeping the gantry crane 2 and the plurality of counterweight blocks 36 in a relatively balanced state on the incremental launching platform 1, reducing the peak values of the bending moment and shear force of the incremental launching platform 1, improving the stability and safety of the incremental launching platform 1. Through the adaptive position adjustment, the operation of the operator to actively adjust the position of the counterweight blocks 36 is reduced, saving the operation time.

[0035] Furthermore, the counterweight assembly 3 further includes four corner brackets 35. The four corner brackets 35 are all connected to the base 34. The four corner brackets 35 are respectively in sliding contact with the four corners of the plurality of counterweight blocks 36. When hoisting the counterweight blocks 36, the four corner brackets 35 play a guiding role and a role in maintaining the stability of the plurality of counterweight blocks 36, preventing the counterweight blocks 36 from shifting.

[0036] Furthermore, one of the guide wheels 37 in a set of guide wheels 37 is connected to a cam 39 at the top. A connecting rod 310 is hinged to the top of the cam 39. One end of the connecting rod 310 away from the cam 39 is hinged to an annular brush 312. The bottom of the annular brush 312 is slidably connected to a slide plate 311. The slide plate 311 is connected to the pushing platform 1. The hinged position of the cam 39 and the connecting rod 310 is eccentrically arranged, so that when the cam 39 rotates, it can drive the annular brush 312 to slide back and forth on the slide plate 311 through the connecting rod 310. The two annular brushes 312 are respectively in sliding contact with the outer walls of the two pull ropes 38. The two annular brushes 312 respectively clean the two rotating pull ropes 38. The reciprocating sliding of the annular brush 312 can further promote the cleaning effect and also facilitate the falling of impurities attached to itself. Through the arrangement of the two annular brushes 312, the two annular brushes 312 can clean the two pull ropes 38 by means of reciprocating movement, maintain the cleanliness of the surface of the pull ropes 38, and reduce the friction between the pull ropes 38 and the guide wheels 37.

[0037] In addition, please refer to Figure 3 , Figure 6 - Figure 11 , and further includes a lubrication assembly 4 for lubricating the two sets of rollers 33. The lubrication assembly 4 includes four scraping blades 44. The four scraping blades 44 are respectively connected to both ends of the two wheel frames 32. The bottom surface of the wheel frame 32 is slidably connected to the top surface of the slide rail 31. The scraping blade 44 is slidably connected to the top surface of the slide rail 31. The wheel frame 32 and the two scraping blades 44 are closely attached to the top surface of the slide rail 31, so that a sealed space is formed between the inside of the wheel frame 32 and the top surface of the slide rail 31. The space between the inside of the wheel frame 32 and the top surface of the slide rail 31 is filled with grease, so that the multiple rollers 33 and the slide rail 31 in contact with the rollers 33 can be wrapped in the grease, thereby maintaining the lubrication state between the rollers 33 and the slide rail 31. The sealed setting of the wheel frame 32 can also prevent the dust in the construction area from mixing with the grease and affecting the lubrication effect. Through the arrangement of the lubrication assembly 4, the two wheel frames 32 can form a sealed space with the two slide rails 31. By injecting grease into the wheel frame 32, the lubrication effect can be continuously maintained, the friction between the rollers 33 and the slide rail 31 can be reduced, and thus the smoothness of the movement of the base 34 can be improved.

[0038] In addition, the lubrication assembly 4 further includes an oil tank 41, two first oil pipes 42, two second oil pipes 43, two turntables 45, two chute frames 46, a movable frame 47, a slide rod 48 and a piston 49. The oil tank 41 is connected to the bottom surface of the base 34. The two first oil pipes 42 and the two second oil pipes 43 are both connected to the oil tank 41. The ends of the two first oil pipes 42 far from the oil tank 41 are respectively connected to the left ends of the two wheel frames 32. The ends of the two second oil pipes 43 far from the oil tank 41 are respectively connected to the right ends of the two wheel frames 32. The movable frame 47 is slidably connected to the bottom surface of the base 34. The two chute frames 46 are respectively connected to both ends of the movable frame 47. The slide rod 48 is connected to the movable frame 47. One end of the slide rod 48 far from the movable frame 47 is connected with the piston 49. The roller 33 includes a wheel axle which penetrates through the wheel frame 32. A set of rollers 33 has a plurality of them. The two turntables 45 are respectively connected to the rotating shafts of one of the rollers 33 among the two sets of rollers 33. The chute frames 46 are provided with chutes. The two turntables 45 are respectively slidably connected to the chutes of the two chute frames 46 through bearings. When the turntables 45 rotate, they drive the chute frames 46 to perform horizontal reciprocating movement through the bearings, converting the circular motion into a linear reciprocating motion. The slide rod 48 is slidably connected through the oil tank 41. The piston 49 is slidably connected to the inner wall of the oil tank 41. The two chute frames 46 drive the slide rod 48 to perform horizontal reciprocating movement through the movable frame 47. The slide rod 48 drives the piston 49 to perform piston movement in the oil tank 41. Check valves are respectively arranged in the first oil pipe 42 and the second oil pipe 43. The check valves enable the grease to flow only in one direction. When the piston 49 performs piston movement, the second oil pipe 43 sucks the grease in the wheel frame 32 into the oil tank 41, and the first oil pipe 42 injects the grease in the oil tank 41 into the wheel frame 32, so that the grease in the wheel frame 32, the first oil pipe 42, the oil tank 41 and the second oil pipe 43 circulates, and the grease in the wheel frame 32 is continuously replaced. The grease can dissipate heat during the process of leaving the wheel frame 32, avoiding the situation that the grease in the wheel frame 32 overheats during long-term operation, thereby reducing the lubrication effect. Through the setting of the oil tank 41, when the base 34 moves, the grease between the oil tank 41 and the two wheel frames 32 can automatically circulate, enabling a part of the grease to leave the wheel frame 32 for heat dissipation, avoiding the overheating of the grease, and thus prolonging the service life of the grease.

[0039] It should be noted that the lubrication assembly 4 further includes a plurality of ball screws 410 and a plurality of rotating rods 411. The plurality of ball screws 410 are all connected to the piston 49. The plurality of rotating rods 411 are all rotatably connected to the inner wall of the fuel tank 41. The plurality of rotating rods 411 are respectively threadedly connected to the plurality of ball screws 410 through balls. When the ball screws 410 reciprocate, they drive the rotating rods 411 to rotate through the threaded connection with the balls. A plurality of paddles 412 are connected to the outer wall of the rotating rods 411. The plurality of paddles 412 on the plurality of rotating rods 411 can stir the grease inside the fuel tank 41 evenly when rotating, improving the uniformity of the grease. Through the arrangement of the plurality of rotating rods 411, the plurality of rotating rods 411 drive the plurality of paddles 412 to stir the grease in the fuel tank 41, maintaining the uniformity of the grease, thereby ensuring the lubrication effect.

[0040] With the above structure, the working principle of this case is as follows: The gantry crane 2 is driven by two traveling devices 21 and moves left and right on the jacking platform 1. The counterweight 36 is hoisted on the base 34 by the gantry crane 2. The number of counterweights 36 can be flexibly adjusted. When hoisting the counterweight 36, the four corner brackets 35 play a guiding role and also maintain the stability of multiple counterweights 36, preventing the counterweights 36 from shifting. The two sets of rollers 33 can roll on the two slide rails 31, enabling the two wheel brackets 32 to drive the base 34 and the counterweight 36 above it to move left and right. The pulling rope 38 is divided into two sections by the base 34, and the lengths of the two sections of the pulling rope 38 from both ends of the traveling device 21 to both ends of the base 34 are the same. When the wheel bracket 32 moves left, the wheel bracket 32 drives the base 34 to move right through the pulling rope 38. When the wheel bracket 32 is in the middle of the jacking platform 1, the base 34 is located below the gantry crane 2. Therefore, when the gantry crane 2 moves, the base 34 can drive multiple counterweights 36 to move in the direction opposite to the moving direction of the gantry crane 2, thereby adjusting the stress state of the jacking platform 1, adjusting the overall center of gravity of the jacking platform 1, and preventing the jacking platform 1 from generating large deformations when the gantry crane 2 hoists at a position far from the center of the jacking platform 1. When the pulling rope 38 rotates following the base 34, it drives the four guide wheels 37 to rotate. The guide wheels 37 with cams 39 drive the cams 39 to rotate. The hinge position between the cam 39 and the connecting rod 310 is eccentrically arranged, so that when the cam 39 rotates, it can drive the annular brush 312 to slide reciprocally on the slide plate 311 through the connecting rod 310. The two annular brushes 312 respectively clean the two rotating pulling ropes 38. The reciprocating sliding of the annular brush 312 can further promote the cleaning effect and also facilitate the falling of the impurities attached to itself. Through the setting of the counterweight assembly 3, the base 34 can move in the opposite direction following the movement of the gantry crane 2, realizing the adaptive position adjustment of multiple counterweights 36, keeping the gantry crane 2 and multiple counterweights 36 in a relatively balanced state on the jacking platform 1, reducing the peak values of the bending moment and shear force of the jacking platform 1, improving the stability and safety of the jacking platform 1. Through the adaptive position adjustment, the operation of the operator to actively adjust the position of the counterweight 36 is reduced, saving the operation time. Through the setting of the two annular brushes 312, the two annular brushes 312 can clean the two pulling ropes 38 by reciprocating movement, maintaining the cleanliness of the surface of the pulling ropes 38 and reducing the friction between the pulling ropes 38 and the guide wheels 37.

[0041] The wheel carrier 32 and the two scraping blades 44 are closely attached to the top surface of the slide rail 31, so that a sealed space is formed between the inside of the wheel carrier 32 and the top surface of the slide rail 31. The space between the inside of the wheel carrier 32 and the top surface of the slide rail 31 is filled with grease, so that the multiple rollers 33 and the slide rail 31 in contact with the rollers 33 can be wrapped in the grease, thereby maintaining the lubrication state between the rollers 33 and the slide rail 31. The sealed setting of the wheel carrier 32 can also prevent the dust in the construction area from mixing with the grease and affecting the lubrication effect. The side of the scraping blade 44 located outside the wheel carrier 32 can clean the impurities on the slide rail 31 during movement, and the side of the scraping blade 44 located inside the wheel carrier 32 can scrape off the grease on the area where the slide rail 31 is about to leave the inside of the wheel carrier 32 during movement, preventing the grease from leaking out; The fuel tank 41, the two first oil pipes 42 and the two second oil pipes 43 are filled with grease. When the roller 33 with the turntable 45 rotates, the turntable 45 is driven to rotate by the rotating shaft. When the turntable 45 rotates, the chute frame 46 is driven to move horizontally back and forth through the bearing, converting the circular motion into a linear reciprocating motion. The two chute frames 46 drive the slide rod 48 to move horizontally back and forth through the movable frame 47, and the slide rod 48 drives the piston 49 to perform a piston motion in the fuel tank 41. The connections of the two first oil pipes 42 and the two second oil pipes 43 to the fuel tank 41 are both located on the side of the piston 49 away from the slide rod 48. The check valves in the two first oil pipes 42 and the two second oil pipes 43 enable the grease to flow in only one direction. Taking one of the wheel carriers 32 as an example, when the piston 49 performs a piston motion, the second oil pipe 43 pumps the grease in the wheel carrier 32 into the fuel tank 41, and the first oil pipe 42 injects the grease in the fuel tank 41 into the wheel carrier 32, so that the grease in the wheel carrier 32, the first oil pipe 42, the fuel tank 41 and the second oil pipe 43 circulates, continuously replacing the grease in the wheel carrier 32. The grease can dissipate heat during the process of leaving the wheel carrier 32, preventing the grease in the wheel carrier 32 from overheating during long-term operation, thereby reducing the lubrication effect. When the piston 49 moves, it drives the multiple ball screws 410 to move back and forth. When the ball screws 410 move back and forth, they drive the rotating rod 411 to rotate through the threaded connection with the balls, so that when the piston 49 moves, the multiple rotating rods 411 can continuously rotate in the fuel tank 41. The multiple paddles 412 on the multiple rotating rods 411 can stir the grease inside the fuel tank 41 evenly when rotating, improving the evenness of the grease; Through the setting of the lubrication assembly 4, a sealed space can be formed between the two wheel carriers 32 and the two slide rails 31. By injecting grease into the wheel carrier 32, the lubrication effect can be continuously maintained, reducing the friction between the rollers 33 and the slide rail 31, thereby improving the smoothness when the base 34 moves; Through the setting of the fuel tank 41, when the base 34 moves, the grease between the fuel tank 41 and the two wheel carriers 32 can automatically circulate, enabling a part of the grease to leave the wheel carrier 32 for heat dissipation, preventing the grease from overheating, thereby prolonging the service life of the grease;Through the arrangement of multiple rotating rods 411, the multiple rotating rods 411 drive multiple paddles 412 to stir the grease in the fuel tank 41, maintaining the uniformity of the grease, thereby ensuring the lubrication effect.

[0042] The above is only a specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A balanced counterweight structure for hoisting in incremental launching construction of bridges without a guide girder, comprising an incremental launching platform (1) and a gantry crane (2) above it, characterized in that: A counterweight assembly (3) is provided on the pushing platform (1) for adaptively adjusting the counterweight area. The counterweight assembly (3) includes two slide rails (31), two wheel carriers (32), two sets of rollers (33), a base (34), a plurality of counterweight blocks (36), two sets of guide wheels (37) and two pull ropes (38). The two slide rails (31) are both installed on the pushing platform (1). The two sets of rollers (33) are respectively rotatably installed in the two wheel carriers (32). The two sets of rollers (33) are respectively in rolling connection with the two slide rails (31). The base (34) is connected to the top surfaces of the two wheel carriers (32). The plurality of counterweight blocks (36) are stacked on the base (34). A lubricating assembly (4) is further included for lubricating the two sets of rollers (33).

2. The balanced counterweight structure for hoisting during the jacking construction without a guide beam for bridge construction according to claim 1, wherein: One set of the guide wheels (37) is provided with four guide wheels. The four guide wheels (37) in the same set are arranged in a rectangle. The two pull ropes (38) are respectively sleeved on the two sets of guide wheels (37). The gantry crane (2) includes two traveling devices (21). The two ends of the two pull ropes (38) are respectively connected to the two sides of the two traveling devices (21). The two pull ropes (38) are both fixedly connected through the base (34).

3. A balanced counterweight structure for lifting during incremental launching construction of a bridge without a guide beam according to claim 1, characterized in that: The counterweight assembly (3) further includes four corner brackets (35). The four corner brackets (35) are all connected to the base (34). The four corner brackets (35) are respectively in sliding contact with the four corners of the plurality of counterweight blocks (36).

4. The balanced counterweight structure for lifting during the incremental launching construction of a bridge without a guide girder according to claim 2, wherein: One of the guide wheels (37) in one set of the guide wheels (37) is connected to a cam (39) at the top. The top of the cam (39) is hinged to a connecting rod (310). The end of the connecting rod (310) away from the cam (39) is hinged to an annular brush (312). The bottom of the annular brush (312) is in sliding connection with a slide plate (311).

5. The balanced counterweight structure for hoisting during the non-guide beam incremental launching construction for bridge construction according to claim 4, wherein: The slide plate (311) is connected to the pushing platform (1). The two annular brushes (312) are respectively in sliding contact with the outer walls of the two pull ropes (38).

6. The balanced counterweight structure for hoisting during the incremental launching construction of a bridge without a guide girder according to claim 1, wherein: The lubricating assembly (4) includes four scraping blades (44). The four scraping blades (44) are respectively connected to the two ends of the two wheel carriers (32). The bottom surface of the wheel carrier (32) is in sliding connection with the top surface of the slide rail (31). The scraping blade (44) is in sliding connection with the top surface of the slide rail (31).

7. A balanced counterweight structure for lifting during incremental launching construction of a bridge without a guiding girder according to claim 6, characterized in that: The lubrication assembly (4) further includes an oil tank (41), two first oil pipes (42), two second oil pipes (43), two turntables (45), two chute frames (46), a movable frame (47), a sliding rod (48), and a piston (49). The oil tank (41) is connected to the bottom surface of the base (34). Both of the two first oil pipes (42) and the two second oil pipes (43) are connected to the oil tank (41). The ends of the two first oil pipes (42) away from the oil tank (41) are respectively connected to the left ends of the two wheel frames (32). The ends of the two second oil pipes (43) away from the oil tank (41) are respectively connected to the right ends of the two wheel frames (32). The movable frame (47) is slidably connected to the bottom surface of the base (34). The two chute frames (46) are respectively connected to both ends of the movable frame (47). The sliding rod (48) is connected to the movable frame (47). One end of the sliding rod (48) away from the movable frame (47) is connected with a piston (49).

8. A balanced counterweight structure for lifting during incremental launching construction of a bridge without a guide beam according to claim 7, characterized in that: The roller (33) includes a wheel axle which penetrates through the wheel frame (32). A plurality of the group of rollers (33) are provided. The two turntables (45) are respectively connected to the rotating shafts of one of the rollers (33) among two groups of rollers (33). The chute frames (46) are provided with chutes. The two turntables (45) are respectively slidably connected to the chutes of the two chute frames (46) through bearings. The sliding rod (48) is slidably connected to the oil tank (41) through penetration. The piston (49) is slidably connected to the inner wall of the oil tank (41). Check valves are respectively arranged in the first oil pipe (42) and the second oil pipe (43).

9. The balanced counterweight structure for hoisting during the incremental launching construction of a bridge without a guide girder according to claim 8, characterized in that: The lubrication assembly (4) further includes a plurality of ball screws (410) and a plurality of rotating rods (411). The plurality of ball screws (410) are all connected to the piston (49). The plurality of rotating rods (411) are all rotatably connected to the inner wall of the oil tank (41). The plurality of rotating rods (411) are respectively threadedly connected to the plurality of ball screws (410) through balls. A plurality of paddles (412) are connected to the outer wall of the rotating rod (411).

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