Steel beam segment lifting appliance for highway-railway bridge construction and mounting method thereof

Abstract

The invention discloses a steel beam segment lifting appliance for highway-railway bridge construction and a mounting method of the steel beam segment lifting appliance, and belongs to the technical field of bridge lifting appliance equipment. The device comprises four upper connecting pieces, and the lower portions of the four upper connecting pieces are fixedly connected with lower connecting pieces through lifting ropes; the upper connecting piece comprises an upper supporting frame and a lower supporting frame, the upper supporting frame and the lower supporting frame are rotationally connected through a middle shaft sleeve, an upper shaft sleeve is rotationally installed at the top of the upper supporting frame, and a lower shaft sleeve is rotationally installed at the bottom of the lower supporting frame; the three sections of lifting ropes are connected through cooperation of the upper connecting piece and the lower connecting piece, stress of the lifting ropes is decomposed section by section, the direction of force is adjusted through relative rotation of the upper supporting frame and the lower supporting frame, all the sections of lifting ropes form a two-force lever structure, the two-force lever transmits loads through nodes, the force flow path is clear, and the structure is simple. The whole structure is not prone to deformation and high in stability, and the structural light weight can be achieved while the strength is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of bridge lifting equipment technology, and in particular to a steel beam segment lifting tool for the construction of a highway-railway bridge and its installation method. Background Technology

[0002] In the hoisting construction of steel beam segments for large-scale railway and highway bridges, traditional lifting equipment generally relies on a single lifting rope in conjunction with pulley blocks to achieve force conversion. Its inherent defects have long constrained construction efficiency and safety: on the one hand, the single rope and multiple pulley system causes the lifting rope to bear complex non-axial forces (such as bending moment and shear force), forcing the use of ultra-large steel wire ropes to compensate for strength loss, significantly increasing material costs and the weight of the lifting equipment; on the other hand, insufficient control of the lifting point posture can easily cause swaying during hoisting, making it difficult to guarantee the high-altitude positioning accuracy of the box girder, and fixed scaffolds cannot be adapted to box girder segments of different sizes, and frequent changes of lifting equipment greatly slow down the construction progress. Summary of the Invention

[0003] This invention provides a steel beam segment lifting tool and its installation method for the construction of a railway-highway bridge, which can solve the problem of insufficient stability of the steel beam segment lifting tool under complex stress in the prior art.

[0004] This invention provides a steel beam segment lifting tool for the construction of a railway-highway bridge, comprising four upper connecting parts, each of which is fixedly connected to a lower connecting part by a lifting rope; the lower connecting parts have the same structure as the upper connecting parts. The upper connecting member includes an upper support frame and a lower support frame, which are rotatably connected by a central bushing. The rotation axis of the central bushing is parallel to the thickness direction of the upper support frame. The upper bushing is rotatably mounted on the top of the upper support frame, and the lower bushing is rotatably mounted on the bottom of the lower support frame. The rotation axes of the upper and lower bushings are perpendicular to the rotation axis of the central bushing. The four upper connectors are arranged in pairs, parallel to each other. The upper bushings of the two upper connectors in the same group are fixedly connected by a traction member, and the middle bushings of the two parallel upper connectors in different groups are fixedly connected by a traction member.

[0005] As a further aspect of the present invention: both ends of the upper bushing, the middle bushing, and the lower bushing are rotatably connected to bushing rollers, and the outer wall of the bushing rollers is provided with rope grooves.

[0006] As a further aspect of the present invention: four lower connectors are arranged in parallel pairs, and a transverse connecting frame is fixedly connected to the side of the two lower connectors in the same group that are close to each other. A transverse tension rod is provided between two corresponding transverse connecting frames, and the two ends of the transverse tension rod are rotatably connected to the two transverse connecting frames respectively. A truss assembly is provided between the middle bushings of two parallel lower connectors in different groups.

[0007] As a further aspect of the present invention: the truss assembly includes two end frames, and a plurality of connecting columns are fixedly connected to the inner walls of the two end frames. One of the connecting columns is rotatably connected to the middle bushing of the lower connecting member, and a truss compression member is fixedly connected between the two end frames.

[0008] As a further aspect of the present invention: the truss compression member is divided into two truss segments, and the two truss segments are rotatably connected at their closest ends by a bearing shaft. A limiting member for limiting the rotation angle of the truss segment is provided on one side of the bearing shaft. The limiting member includes a telescopic rod, and both ends of the telescopic rod are rotatably connected to a limiting frame.

[0009] As a further embodiment of the present invention: the limiting frame includes a limiting base plate and a limiting cover plate, the limiting base plate is slidably disposed inside the limiting cover plate, a positioning rod is fixedly connected to the top of the inner wall of the limiting cover plate, and a plurality of positioning holes are opened on the outer wall of the receiving shaft, the positioning rod is inserted into the positioning holes.

[0010] As a further aspect of the present invention: a balance beam assembly is rotatably installed inside the lower bushings of the four lower connecting parts. The balance beam assembly includes a beam frame, and mounting plates are fixedly connected to both sides of the beam frame. Several mounting holes are opened in the middle of the two mounting plates. A lifting roller is rotatably installed in one mounting hole on each of the two mounting plates. A lifting rope groove is opened on the outer wall of the lifting roller.

[0011] As a further embodiment of the present invention: a lifting lug is fixedly connected to the top of the box girder segment, a lifting lug roller is rotatably connected to the inner wall of the lifting lug, a lifting lug rope groove is provided on the outer wall of the lifting lug roller, and the lifting lug roller and the lifting lug rope groove are fixedly connected by a lifting rope.

[0012] As a further embodiment of the present invention: the traction component is a polymer sling or an upper pressure rod, the upper pressure rod includes two pressure rod heads, the two pressure rod heads are rotatably connected to two central bushings respectively, and a number of pressure rod segments are fixedly connected between the two pressure rod heads.

[0013] A method for installing a steel beam segment lifting device for the construction of a railway-highway bridge includes the following steps: Step 1: Install the hoisting and assembly frame in advance. The hoisting equipment assembly site is selected on the pier test pile platform. Before installation, it is necessary to measure and lay out the layout of the hoisting equipment assembly frame. Step 2: Install the truss compression members and transverse connecting frames, and connect and fix several lower connecting parts; Step 3: Connect the upper connector to the lower connector using the hoisting rope; Step 4: Connect and secure the various upper components using polymer slings or upper pressure bars; Step 5: Perform bolt installation. After the splicing and installation of the lifting equipment is completed, tighten the bolts at the pre-reserved bolt points on the lifting equipment components.

[0014] As a further aspect of the present invention: in step five, the bolt tightening operation is divided into two parts: initial tightening and final tightening. The initial tightening torque should be 50% of the final tightening torque, and the final tightening torque is 1000 N·m.

[0015] As a further aspect of the present invention: after the initial tightening is completed, a white paint mark line should be drawn on the end face of the screw and the relative position of the nut, and then the final tightening should be carried out; after the final tightening is completed, observe whether the nut rotation angle meets the requirements. For individual rotation angles with excessive deviation, an inspection wrench can be used to check the final tightening torque value. If the torque is insufficient, tighten it to the specified torque. If the torque exceeds the limit, replace the bolt.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Compared with the traditional method of changing direction by using a single hoisting rope and pulley system, the present invention divides the hoisting rope into three sections and connects the three sections by the cooperation of upper and lower connecting parts. Furthermore, the upper and lower connecting parts are divided into two-section structures formed by the rotation of two support frames. The advantage of this design is that the force on the hoisting rope is decomposed segment by segment, and the direction of the force is adjusted by the relative rotation of the upper and lower support frames. This makes each section of the hoisting rope a two-force lever structure, that is, each section of the hoisting rope is only subjected to two forces in the same straight line. The axial force on each section of the hoisting rope can fully utilize the material strength of the hoisting rope, save materials and reduce the self-weight of the structure. The two-force lever transmits the load through the nodes, the force flow path is clear, the overall structure has strong stability, and it is not easy to cause unexpected deformation. It can achieve structural lightweighting while ensuring strength. This invention provides limiting support for the four lower connecting parts by setting up a transverse connecting frame and truss assembly, thereby ensuring that the position, posture and spacing of each lower connecting part remain stable. This allows the balance beam assembly connected to the lower connecting parts and the lifting rope connected to the lifting lugs to maintain a stable spacing, thus keeping the lifting rope vertical during the lifting process, reducing swaying during the lifting process and improving the lifting stability. This invention allows for the installation and connection of connecting columns and lower connecting parts at different locations, enabling adjustment of the installation position of the end frame according to the size of the box girder. This allows for fine-tuning of the spacing between the lower connecting parts, meeting the hoisting needs of box girders of different sizes. By dividing the truss compression member into two mutually rotating connected sections, the spacing between the two lower connecting parts can be changed by rotation. This ensures that the hoisting rope connected to the lifting lug at the end remains vertical, meeting the hoisting needs of box girder segments of different widths, thus making the device more flexible in use. Attached Figure Description

[0017] Figure 1 This is a front view of the lifting device of the present invention; Figure 2 This is a side view of the lifting device of the present invention; Figure 3 This is a front cross-sectional view of the upper connector of the present invention; Figure 4 This is a side cross-sectional view of the upper connector of the present invention; Figure 5 This is a front view of the balance beam assembly of the present invention; Figure 6 This is a schematic diagram of the transverse connecting frame of the present invention; Figure 7 This is a schematic diagram showing the installation position of the limiting component of the present invention; Figure 8 This is a cross-sectional schematic diagram of the limiting component of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Upper connecting component; 101. Upper support frame; 102. Lower support frame; 103. Upper bushing; 104. Middle bushing; 105. Lower bushing; 106. Bushing roller; 107. Rope groove; 2. Lower connecting component; 3. Traction component; 401. Transverse connecting frame; 402. Transverse tension / compression rod; 5. Balance beam assembly; 501. Beam frame; 502. Mounting plate; 503. Mounting hole; 504. Lifting roller; 6. Truss assembly; 601. End frame; 602. Connecting column; 603. Truss section; 604. Limiting component; 6041. Limiting cover plate; 6042. Limiting base plate; 6043. Telescopic rod; 6045. Receiving shaft; 6046. Positioning hole; 6047. Positioning insert rod; 7. Box girder segment; 8. Lifting hook; 9. Lifting lug. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] like Figures 1 to 8 As shown in the figure, the present invention provides a steel beam segment lifting tool for the construction of a railway-highway bridge. Please refer to the following: Figure 1 and Figure 2 It includes four upper connectors 1, and each of the four upper connectors 1 is fixedly connected to a lower connector 2 by a sling rope; the lower connector 2 has the same structure as the upper connector 1. Please see Figure 3 and Figure 4The upper connecting member 1 includes an upper support frame 101 and a lower support frame 102. The upper support frame 101 and the lower support frame 102 are rotatably connected by a middle bushing 104. The rotation axis of the middle bushing 104 is parallel to the thickness direction of the upper support frame 101. An upper bushing 103 is rotatably mounted on the top of the upper support frame 101, and a lower bushing 105 is rotatably mounted on the bottom of the lower support frame 102. The rotation axes of the upper bushing 103 and the lower bushing 105 are perpendicular to the rotation axis of the middle bushing 104. Please see Figure 1 and Figure 2 Four upper connecting parts 1 are arranged in pairs, parallel to each other. The upper bushings 103 of two upper connecting parts 1 in the same pair are fixedly connected by a traction member 3, and the middle bushings 104 of two parallel upper connecting parts 1 in different pairs are fixedly connected by a traction member 3. Both ends of the upper bushing 103, the middle bushing 104, and the lower bushing 105 are rotatably connected to bushing rollers 106, and the outer wall of the bushing rollers 106 is provided with rope grooves 107. In specific implementation, the upper bushing 103 is fixedly connected to the hook 8 of an external hoisting device via a lifting rope, and the lower bushing 105 is connected to the upper bushing 103 of the lower connecting part 2 via a lifting rope. Compared to the traditional method of reversing direction using a single hoisting rope and pulley system, this application divides the hoisting rope into three sections, which are connected by an upper connector 1 and a lower connector 2. Furthermore, the upper connector 1 and the lower connector 2 are each configured as a two-section structure formed by the rotation of two support frames. The advantage of this design is that the force on the hoisting rope is decomposed segment by segment, and the direction of the force is adjusted by the relative rotation of the upper support frame 101 and the lower support frame 102. This makes each section of the hoisting rope a two-force lever structure, meaning that each section of the hoisting rope is only subjected to forces in two directions along the same straight line. This ensures that each section of the hoisting rope is only subjected to axial force, which can fully utilize the material strength of the hoisting rope, save materials and reduce the structural weight. The two-force levers transmit the load through nodes (i.e., the positions of each bushing), the force flow path is clear, the overall stability is strong, and it is not easy to cause unexpected deformation. This allows for structural lightweighting while ensuring strength.

[0021] The traction component 3 is a polymer sling or an upper pressure bar. When using the upper pressure bar, the upper pressure bar includes two pressure bar heads, which are rotatably connected to two central bushings 104 respectively. Several pressure bar segments are fixedly connected between the two pressure bar heads. In this embodiment, a polymer sling is used, and the connection method using the upper pressure bar is not shown in the figure.

[0022] Please see Figure 1 and Figure 6Four lower connectors 2 correspond to four upper connectors 1 respectively, forming a parallel arrangement in pairs. A transverse connecting frame 401 is fixedly connected to the side of the two lower connectors 2 in the same group that are close to each other. A transverse tension rod 402 is provided between the two corresponding transverse connecting frames 401, and the two ends of the transverse tension rod 402 are rotatably connected to the two transverse connecting frames 401 respectively. A truss assembly 6 is provided between the middle bushings 104 of the two lower connectors in different groups that are in parallel positions. Through the arrangement of the transverse connecting frame 401 and the truss assembly 6, the four lower connectors 2 are limited and supported, thereby ensuring that the position, posture and spacing of each lower connector 2 remain stable. This allows the balance beam assembly 5 connected to the lower connector 2 and the lifting rope connected to the lifting lug to maintain a stable spacing, thereby keeping the lifting rope vertical during the lifting process, reducing swaying during the lifting process and improving the lifting stability.

[0023] Please see Figure 2 The truss assembly 6 includes two end frames 601, and several connecting columns 602 are fixedly connected to the inner walls of the two end frames 601. One of the connecting columns 602 is rotatably connected to the middle bushing 104 of the lower connecting member 2. A truss compression member is fixedly connected between the two end frames 601. In specific implementation, the installation position of the end frames can be adjusted according to the size of the box girder, that is, different positions of the connecting columns 602 are selected to be installed and connected to the lower connecting member 2, so as to achieve fine adjustment of the spacing of the lower connecting member 2 and meet the hoisting needs of box girders of different sizes.

[0024] Please see Figure 7 and Figure 8 To further improve the adjustability of the spacing of the lower connecting member 2, the truss compression member is divided into two truss segments 603. The two truss segments 603 are rotatably connected at their closest ends via a bearing shaft 6045. A limiting member 604 is provided on one side of the bearing shaft 6045 to limit the rotation angle of the truss segment 603. The limiting member 604 includes a telescopic rod 6043, and both ends of the telescopic rod 6043 are rotatably connected to a limiting frame. The specific structure of the telescopic rod 6043 can be implemented with reference to the telescopic devices in the prior art. The equipment, such as hydraulic cylinders and electric telescopic rods 6043, divides the truss compression member into two mutually rotating and connected sections. This allows the distance between the two lower connecting parts 2 to be changed by rotation. This satisfies the need to lift box girder segments 7 of different widths while ensuring that the lifting rope connected to the lifting lug at the end is vertical. By setting a limit frame and telescopic mechanism, the rotation angle and posture of the truss segment 603 are limited to prevent the truss segment 603 from swaying randomly and to ensure the support and limiting effect of the truss compression member.

[0025] The limiting frame includes a limiting base plate 6042 and a limiting cover plate 6041. The limiting base plate 6042 is slidably disposed within the limiting cover plate 6041. A positioning rod 6047 is fixedly connected to the top of the inner wall of the limiting cover plate 6041. Several positioning holes 6046 are opened on the outer wall of the receiving shaft 6045. The positioning rod 6047 is inserted into the positioning hole 6046. Through the insertion of the positioning rod 6047 into the positioning hole 6046, the rotation of the receiving shaft 6045 is restricted, thereby improving the limiting effect of the limiting component 604 on the rotation of the truss section 603.

[0026] Please see Figure 1 and Figure 5 To achieve the connection between the lower connecting parts 2 and the box girder segment 7, a balance beam assembly 5 is rotatably installed inside the lower bushing 105 of each of the four lower connecting parts 2. The balance beam assembly 5 includes a beam frame 501, and mounting plates 502 are fixedly connected to both sides of the beam frame 501. Several mounting holes 503 are opened in the middle of the two mounting plates 502. A lifting roller 504 is rotatably installed in one mounting hole 503 on each of the two mounting plates 502. The outer wall of the lifting roller 504 is provided with a lifting rope groove 107. A lifting lug 9 is fixedly connected to the top of the box girder segment 7. A lifting lug roller is rotatably connected to the inner wall of the lifting lug 9. The outer wall of the lifting lug roller is provided with a lifting rope groove 107. The lifting lug roller and the lifting rope groove 107 are fixedly connected by a lifting rope.

[0027] This invention provides a steel beam segment lifting tool for the construction of a railway-highway bridge, which, during installation and use, First, the hoisting and assembly support is installed in advance. The hoisting equipment assembly site is selected on the pier test pile platform. Before installation, the layout of the hoisting equipment assembly support needs to be measured and laid out. Then, the truss pressure members and transverse connecting frames 401 are installed. The truss pressure members and transverse connecting frames 401 are used to limit and connect and fix several lower connecting parts 2. Then, the bushing rollers 106 of the lower bushing 105 of the upper connecting part 1 are connected to the bushing rollers 106 of the upper bushing 103 of the lower connecting part 2 by means of hoisting ropes. Finally, the upper connecting parts 1 are connected and fixed by polymer slings. Then, bolt installation is carried out. After the splicing and installation of the lifting equipment is completed, the bolts are tightened at the pre-reserved bolt points on the lifting equipment components. The bolt tightening operation is divided into two parts: initial tightening and final tightening. The initial tightening torque should be 50% of the final tightening torque, and the final tightening torque is 1000 N·m. After the initial tightening is completed, a white paint mark line should be drawn on the end face of the screw and the relative position of the nut. Then, the final tightening is carried out. After the final tightening is completed, observe whether the nut rotation angle meets the requirements. For individual rotation angles with excessive deviation, use an inspection wrench to check the final tightening torque value. If the torque is insufficient, tighten it to the specified torque. If the torque exceeds the limit, replace the bolt.

[0028] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A steel beam segment lifting tool for the construction of a railway-highway bridge, characterized in that, It includes four upper connectors (1), and each of the four upper connectors (1) is fixedly connected to a lower connector (2) by a sling rope; the lower connector (2) has the same structure as the upper connector (1); The upper connecting member (1) includes an upper support frame (101) and a lower support frame (102). The upper support frame (101) and the lower support frame (102) are rotatably connected by a middle bushing (104). An upper bushing (103) is rotatably installed on the top of the upper support frame (101), and a lower bushing (105) is rotatably installed on the bottom of the lower support frame (102). Four upper connectors (1) are arranged in pairs in parallel. The upper bushings (103) of two upper connectors (1) in the same group are fixedly connected by a traction member (3). The middle bushings (104) of two parallel upper connectors (1) in different groups are fixedly connected by a traction member (3).

2. The steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 1, characterized in that, The upper bushing (103), the middle bushing (104) and the lower bushing (105) are all rotatably connected to bushing rollers (106), and the outer wall of the bushing rollers (106) is provided with rope grooves (107).

3. The steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 1, characterized in that, The traction component (3) is a polymer sling or an upper pressure bar. The upper pressure bar includes two pressure bar heads, which are rotatably connected to two central bushings (104) respectively. Several pressure bar segments are fixedly connected between the two pressure bar heads.

4. The steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 1, characterized in that, Four lower connectors (2) are arranged in parallel pairs. A transverse connecting frame (401) is fixedly connected to the side of the two lower connectors (2) in the same group that are close to each other. A transverse tension rod (402) is provided between the two corresponding transverse connecting frames (401). The two ends of the transverse tension rod (402) are rotatably connected to the two transverse connecting frames (401) respectively. A truss assembly (6) is provided between the middle bushings (104) of two parallel lower connectors (2) in different groups.

5. The steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 4, characterized in that, The truss assembly (6) includes two end frames (601), and a number of connecting columns (602) are fixedly connected to the inner walls of the two end frames (601). One of the connecting columns (602) is rotatably connected to the middle bushing (104) of the lower connecting member (2). A truss compression member is fixedly connected between the two end frames (601).

6. The steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 5, characterized in that, The truss compression member is divided into two truss segments (603). The two truss segments (603) are rotatably connected at their closest ends by a bearing shaft (6045). A limiting member (604) is provided on one side of the bearing shaft (6045) to limit the rotation angle of the truss segment (603). The limiting member (604) includes a telescopic rod (6043), and both ends of the telescopic rod (6043) are rotatably connected to a limiting frame.

7. The steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 6, characterized in that, The limiting frame includes a limiting base plate (6042) and a limiting cover plate (6041). The limiting base plate (6042) is slidably disposed inside the limiting cover plate (6041). A positioning rod (6047) is fixedly connected to the top of the inner wall of the limiting cover plate (6041). A plurality of positioning holes (6046) are opened on the outer wall of the receiving shaft (6045). The positioning rod (6047) is inserted into the positioning hole (6046).

8. The steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 4, characterized in that, The lower bushings (105) of the four lower connecting parts (2) are rotatably mounted with balance beam assemblies (5). The balance beam assembly (5) includes a beam frame (501). The two sides of the beam frame (501) are fixedly connected with mounting plates (502). Several mounting holes (503) are opened in the middle of the two mounting plates (502). Each of the two mounting plates (502) has a mounting hole (503) in which a lifting roller (504) is rotatably mounted. The outer wall of the lifting roller (504) is provided with a lifting rope groove (107).

9. A steel beam segment lifting tool for construction of a railway-highway bridge as described in claim 8, characterized in that, The top of the box girder segment (7) is fixedly connected to a lifting lug (9). The inner wall of the lifting lug (9) is rotatably connected to a lifting lug roller. The outer wall of the lifting lug roller is provided with a lifting lug rope groove (107). The lifting lug roller and the lifting lug rope groove (107) are fixedly connected by a lifting rope.

10. The method for installing a steel beam segment lifting device for the construction of a railway-highway bridge as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Install and arrange the lifting gear assembly bracket; Step 2: Connect and fix several lower connecting parts (2); Step 3: Connect the upper connector (1) to the lower connector (2) using a hoisting rope; Step 4: Connect and secure the various upper components using polymer slings or upper pressure bars; Step 5: Perform bolt installation. After the splicing and installation of the lifting equipment is completed, tighten the bolts at the pre-reserved bolt points on the lifting equipment.

Images