Auxiliary device for steel box girder jacking construction

Abstract

The utility model relates to the technical field of bridge construction equipment, and discloses an auxiliary device for jacking construction of a steel box girder, the auxiliary device comprises a horizontal base platform and a plurality of groups of vertically stacked jacking columns, the plurality of groups of jacking columns are uniformly distributed on the horizontal base platform in the circumferential direction of the gravity center of the steel box girder, and every two vertically adjacent jacking columns in each group of jacking columns are coaxially inserted and matched; jacks electrically connected to a control system are arranged on the top shoring columns of each set, lifting guide cylinders are arranged at the positions, corresponding to the top shoring columns of each set, of the horizontal base table, the bottom shoring columns of each set are located in the lifting guide cylinders, loading and unloading openings allowing the top shoring columns to be inserted are formed in the side walls of the lifting guide cylinders, and supporting plates are arranged in the lifting guide cylinders in a lifting mode. And a fixing assembly for clamping the back shore column is further arranged on the guide lifting cylinder. The steel box girder jacking device has the effect of improving the safety of the steel box girder jacking construction process.

Description

Technical Field

[0001] This application relates to the field of bridge construction equipment technology, and in particular to an auxiliary device for lifting steel box girders during construction. Background Technology

[0002] In bridge construction, steel box girders, as core structural components, are widely used in the construction of various large bridges due to their high strength and lightweight characteristics. The jacking operation of steel box girders is one of the key aspects of bridge construction, involving important procedures such as girder erection, bearing replacement, and structural adjustments. This operation not only directly affects the construction quality and safety of the bridge but also plays a crucial role in construction efficiency and cost control. With the continuous expansion of bridge engineering scale and the increasing demands of construction, the auxiliary equipment and technical methods for steel box girder jacking construction are also constantly being improved and perfected.

[0003] To address the needs of steel box girder jacking construction, the industry currently employs various methods for the jacking operation. One common method is to use timber as a support, gradually lifting the steel box girder to the required height by continuously adding timber and using jacks.

[0004] However, when faced with steel box girders weighing thousands of tons, traditional timber or simple support structures, due to their limited material strength and stability, cannot ensure the safety and reliability of the jacking process. Utility Model Content

[0005] To improve the safety of the steel box girder lifting construction process, this application provides an auxiliary device for steel box girder lifting construction.

[0006] The auxiliary device for lifting steel box girders provided in this application adopts the following technical solution:

[0007] An auxiliary device for lifting steel box girders includes a horizontal base and several sets of vertically stacked support columns. The support columns are evenly distributed around the center of gravity of the steel box girder on the horizontal base. Two vertically adjacent support columns in each set are coaxially inserted. A jack electrically connected to a control system is arranged on the highest support column in each set. A guide cylinder is provided on the horizontal base corresponding to each set of support columns. The lowest support column in each set is located inside the guide cylinder. The side wall of the guide cylinder has a loading and unloading port for inserting the support columns. A support plate is raised and lowered inside the guide cylinder, and a fixing component for clamping the support columns is provided on the guide cylinder.

[0008] By adopting the above technical solution, the supporting columns are made of steel, possessing stable strength and hardness. Furthermore, during the jacking construction of the steel box girder, several sets of supporting columns are evenly distributed circumferentially along the center of gravity of the steel box girder on a horizontal base, improving the stability of the support. Each set of supporting columns is vertically interlocked to achieve height adjustment. Combined with the lifting operation of the pallet inside the guide tube, the stacking height of the supporting columns can be flexibly adjusted to meet different jacking requirements. Loading and unloading ports on the side wall of the guide tube facilitate the insertion of new supporting columns, while the fixing components firmly clamp the supporting columns, improving structural stability during the jacking process. Finally, the precise jacking of the steel box girder is completed by jacks driven by the control system. This solution effectively distributes the weight of the steel box girder, reduces the safety hazards caused by excessive stress on a single support point, and significantly improves the safety and reliability of the jacking construction.

[0009] Optionally, the pallet and the guide cylinder are vertically slidably coupled, and a lifting hydraulic cylinder is provided at the bottom of the guide cylinder. The piston rod of the lifting hydraulic cylinder is vertically arranged, and the top end of the piston rod is connected to the bottom of the pallet.

[0010] By adopting the above technical solution, the vertical sliding fit between the pallet and the guide cylinder enables stable lifting and lowering of the pallet within the guide cylinder, reducing the possibility of the pallet shifting or jamming during lifting and lowering, thereby improving the operational reliability of the device. The lifting hydraulic cylinder provides a strong upward lifting force to the pallet, which in turn stably lifts the support column placed on the pallet, improving the accuracy and safety of the steel box girder lifting construction.

[0011] Optionally, the top support column is provided with multiple positioning grooves in its circumferential ring. The fixing assembly includes multiple push rods circumferentially disposed on the top wall of the guide cylinder, a fixing plug disposed at the end of the push rod, and a driving component that drives the multiple push rods to move synchronously toward the axis of the top support column. Each push rod is slidably disposed on the top of the guide cylinder along the radial direction of the guide cylinder. The fixing plug corresponds one-to-one with the positioning groove and is plugged in.

[0012] By adopting the above technical solution, when it is necessary to fix the top support column, the driving component drives multiple push rods to move synchronously toward the axis of the top support column, so that the fixing plugs at the ends of the push rods correspond one-to-one with the positioning grooves on the circumference of the top support column and are inserted into each other. This not only achieves a stable clamping of the top support column, but also provides safety for the insertion process of new top support columns, improves the positioning accuracy and stability of the top support columns during vertical stacking, and thus effectively reduces the safety hazards caused by loosening or displacement of the top support columns during the lifting process.

[0013] Optionally, the push rod is threaded around its periphery, and the driving component includes a drive gear rotatably mounted on the push rod via the thread, a drive gear ring rotatably mounted on the guide cylinder, a drive gear meshing with the drive gear ring, and a motor driving the drive gear to rotate. The push rod has a guide groove on its axial sidewall, and a guide key is slidably disposed in the guide groove. The guide key is disposed on the guide cylinder, and the drive gear is rotatably connected to the outer sidewall of the guide cylinder. Multiple drive gears rotate and mesh with the drive gear ring together.

[0014] By adopting the above technical solution, the motor first drives the drive gear to rotate, which in turn drives the drive gear ring to rotate synchronously, thereby causing multiple drive gears to rotate synchronously on the outer wall of the guide cylinder. Because the push rod has threads all around its body that engage with the drive gears, and a guide key slides within a guide groove to restrict the push rod's rotation, the push rod can move smoothly radially along the guide cylinder. Finally, the fixing plug at the end of the push rod is accurately inserted into the positioning groove of the top support column, achieving a stable clamping of the top support column. This not only improves the automation level of the top support column fixing but also effectively enhances operational efficiency and clamping reliability, thereby improving the safety and stability of the steel box girder lifting process.

[0015] Optionally, a pad block is provided at the bottom of the steel box girder corresponding to each set of top support columns, and a positioning sleeve with the pad block is provided on the top of the piston rod of the jack. The pad block and the positioning sleeve are vertically inserted together.

[0016] By adopting the above technical solution, the vertical insertion and connection between the jack and the positioning sleeve can effectively improve the stability of the jack's support for the steel box girder and reduce the problem of uneven force caused by positional displacement during the jacking process. At the same time, this structural design simplifies the connection operation between the jack and the steel box girder, improves construction efficiency, and ensures the safety and reliability of the jacking process.

[0017] Optionally, each positioning sleeve is equipped with a verticality detection component, which includes a rod vertically mounted on the outer wall of the positioning sleeve, a laser pointer suspended from the rod by a rope, and a scale on the outer wall of the positioning sleeve, with the scale located directly below the laser pointer.

[0018] By adopting the above technical solution, when the jacks lift the steel box girder, the laser pointer will change position with any slight tilt and project a corresponding deviation indication on the dial. Construction personnel can intuitively judge the verticality of the steel box girder based on the projection position of the laser pointer on the dial, thereby adjusting the stress during the lifting process in a timely manner. This ensures that the steel box girder maintains good verticality throughout the lifting process, reducing safety hazards and structural damage caused by tilting.

[0019] Optionally, the positioning sleeve is provided with a protective shell covering the verticality detection component, and the protective shell is transparent.

[0020] By adopting the above technical solution, the transparent protective shell can effectively reduce the impact of external environmental factors, such as dust and rain, on the verticality detection components during construction, thereby improving the accuracy and reliability of the verticality detection results. At the same time, the transparent design does not obstruct the transmission of laser pointer light, allowing workers to clearly observe the readings on the dial, further improving the precise control capability during the steel box girder lifting process.

[0021] Optionally, the jack is fitted with a connecting ring, and multiple fixing nuts are distributed circumferentially on the connecting ring. The axial direction of each fixing nut is arranged along the radial direction of the connecting ring. Two adjacent connecting ring supports that are lifted synchronously are provided with telescopic connecting rods, and the ends of the telescopic connecting rods are rotatably connected to the fixing nuts by threads.

[0022] By adopting the above technical solution, during the jacking process, the telescopic connecting rod can automatically adjust its length according to the jack spacing under actual working conditions, ensuring that the actions of multiple connected jacks are consistent, thereby significantly improving the balance and safety during the jacking of the steel box girder. Furthermore, the threaded connection method facilitates quick assembly and disassembly and adjustment, improving construction efficiency and reducing maintenance costs.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The support columns are made of steel, possessing stable strength and hardness. During the jacking construction of the steel box girder, several sets of support columns are evenly distributed around the center of gravity of the steel box girder on a horizontal base, improving the stability of the support. Each set of support columns is vertically interlocked for height adjustment. Combined with the lifting operation of the pallets inside the guide tube, the stacking height of the support columns can be flexibly adjusted to meet different jacking requirements. Loading and unloading ports on the side wall of the guide tube facilitate the insertion of new support columns, while the fixing components firmly clamp the support columns, improving structural stability during the jacking process. Finally, the precise jacking of the steel box girder is completed by jacks driven by the control system. This scheme effectively distributes the weight of the steel box girder, reduces the safety hazards caused by excessive stress on a single support point, and significantly improves the safety and reliability of the jacking construction.

[0025] 2. The vertical sliding fit between the pallet and the guide cylinder enables stable lifting and lowering of the pallet within the guide cylinder, reducing the possibility of the pallet shifting or jamming during lifting and lowering, thereby improving the operational reliability of the device. The lifting hydraulic cylinder provides a strong upward lifting force to the pallet, which in turn stably lifts the top support column placed on the pallet, improving the accuracy and safety of the steel box girder lifting construction;

[0026] 3. When it is necessary to fix the top support column, the drive unit drives multiple push rods to move synchronously toward the axis of the top support column, so that the fixing plugs at the ends of the push rods correspond one-to-one with the positioning grooves on the circumference of the top support column and are inserted into each other. This not only achieves a stable clamping of the top support column, but also provides safety for the insertion of new top support columns, improves the positioning accuracy and stability of the top support columns during vertical stacking, and thus effectively reduces the safety hazards caused by loosening or displacement of the top support columns during the lifting process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a schematic diagram illustrating the positional relationship between the top support column, the jack, and the pad beam in the embodiments of this application.

[0029] Figure 3 This is a schematic diagram illustrating the positional relationship between the boom, laser pointer, and dial in an embodiment of this application.

[0030] Figure 4 This is a cross-sectional view illustrating the positional relationship between the top support column, the guide cylinder, and the lifting hydraulic cylinder in the embodiments of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 01. Steel box girder; 1. Horizontal base; 2. Top support column; 21. Positioning groove; 3. Jack; 4. Pad beam block; 5. Positioning sleeve; 51. Protective shell; 6. Verticality detection component; 61. Lifting rod; 611. Pull rope; 62. Laser pointer; 63. Dial; 7. Connecting ring; 71. Fixing nut; 72. Telescopic connecting rod; 8. Guide cylinder; 81. Loading and unloading port; 82. Support plate; 83. Lifting hydraulic cylinder; 84. Guide key; 9. Fixing component; 91. Push rod; 911. Guide groove; 92. Fixing plug; 93. Drive component; 931. Drive gear; 932. Drive gear ring; 933. Drive gear; 934. Motor. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0034] This application discloses an auxiliary device for the jacking construction of steel box girders.

[0035] Reference Figure 1An auxiliary device for lifting steel box girders includes a horizontal base 1 and several sets of vertically stacked support columns 2. The horizontal base 1 serves as the foundation of the entire device and is made of cast concrete. The shape of the horizontal base 1 can be rectangular, circular, or other regular geometric shapes. In this embodiment, the horizontal base 1 is rectangular with its top surface horizontal, and its dimensions can be adjusted according to the actual working conditions.

[0036] Reference Figure 1 and Figure 2 Several sets of support columns 2 are evenly distributed circumferentially around the center of gravity of the steel box girder 01 on the horizontal base 1. In this embodiment, eight sets are used as an example. The two vertically adjacent support columns 2 in each set are coaxially inserted and connected, and the two vertically adjacent support columns 2 in each set are bolted together. A jack 3 electrically connected to the control system is bolted to the highest support column 2 in each set. A square pad beam block 4 is fixedly installed at the bottom of the steel box girder 01 corresponding to each set of support columns 2. A positioning sleeve 5 is fixedly installed on the top of the piston rod of each jack 3. The positioning sleeve 5 supports the pad beam block 4 and fits the pad beam block 4. The pad beam block 4 and the positioning sleeve 5 are vertically inserted and connected.

[0037] Reference Figure 2 and Figure 3 To monitor the verticality of the jacks 3 during the lifting process, each positioning sleeve 5 is equipped with a verticality detection component 6. The verticality detection component 6 includes a lifting rod 61, a laser pointer 62, and a dial 63. The lifting rod 61 is vertically fixed to the outer wall of the positioning sleeve 5, and the laser pointer 62 is suspended from the lifting rod 61 by a rope 611. The dial 63 is located directly below the laser pointer 62 and is fixedly mounted on the outer wall of the positioning sleeve 5. Furthermore, a protective shell 51 is fixedly mounted on the positioning sleeve 5 to cover the verticality detection component 6. The protective shell 51 is transparent, preventing external dust or rainwater from entering without affecting observation.

[0038] Reference Figure 1 In this embodiment, the jacks 3 at the top of the eight sets of supporting columns 2 are staggered and arranged in a matrix of four sets as a batch. After the jacks 3 of the same batch lift the steel box girder 01 to a higher position, the remaining batch of jacks 3 are then adjusted to a higher position, thus alternately lifting the steel box girder 01 to a higher position.

[0039] Reference Figure 1 and Figure 2 To improve the synchronicity of the lifting of the same batch of jacks 3, a connecting ring 7 is nested on the jack 3. Multiple fixing nuts 71 are fixedly distributed around the circumference of the connecting ring 7. In this embodiment, two are used as an example. The axial direction of each fixing nut 71 is arranged along the radial direction of the connecting ring 7. A telescopic connecting rod 72 is provided between two adjacent connecting rings 7 that are lifted synchronously. The end of the telescopic connecting rod 72 is connected to the fixing nut 71 by a threaded rotation.

[0040] Reference Figure 1 , Figure 2 and Figure 4 A guide cylinder 8 is fixedly installed on the horizontal base 1 at each set of support columns 2. The guide cylinder 8 is used to guide and support the lifting and lowering movement of the support columns 2. It has a hollow cylindrical structure inside. The lowest support column 2 of each set is located inside the guide cylinder 8. The side wall of the guide cylinder 8 has a loading and unloading port 81 for inserting new support columns 2. A support plate 82 is installed inside the guide cylinder 8 and is used to support the weight of the support column 2. The support plate 82 and the guide cylinder 8 are vertically slidingly engaged. A lifting hydraulic cylinder 83 is fixedly installed at the bottom of the guide cylinder 8. The piston rod of the lifting hydraulic cylinder 83 is vertically arranged, and its top end is fixedly connected to the bottom wall of the support plate 82.

[0041] Reference Figure 4 The guide cylinder 8 is also provided with a fixing component 9 for clamping the top support column 2. The fixing component 9 includes multiple push rods 91, a fixing plug 92 and a driving component 93. The push rod 91 has threads around its circumference and a guide groove 911 is provided on the side wall of the push rod 91 along its own axial direction. A guide key 84 is slidably provided in the guide groove 911. The guide key 84 is integrally formed in the through hole on the guide cylinder 8 for the push rod 91 to slide and move. Each push rod 91 is slidably provided on the top of the guide cylinder 8 along the radial direction. The top support column 2 has multiple positioning grooves 21 around its circumference. The fixing plug 92 is hemispherical and fixed to one end of the push rod 91, corresponding one-to-one with the positioning grooves 21 on the top support column 2 and plugging in.

[0042] Reference Figure 4 In this embodiment, the driving component 93 includes a driving gear 931, a driving gear ring 932, a drive gear 933, and a motor 934. The driving gear 931 is threadedly mounted on the push rod 91 and rotatably connected to the outer ring sidewall of the guide cylinder 8. The driving gear ring 932 is coaxially mounted on the outer ring sidewall of the guide cylinder 8, and multiple driving gears 931 mesh with the driving gear ring 932. The motor 934 is fixedly mounted on the outer ring sidewall of the guide cylinder 8, and the drive gear 933 is fixedly mounted on the output shaft of the motor 934, and the drive gear 933 also meshes with the driving gear ring 932.

[0043] The implementation principle of the auxiliary device for lifting steel box girder construction according to this application embodiment is as follows: During the lifting construction of steel box girder 01, a horizontal base 1 is first poured on the ground of the construction site. Then, a guide cylinder 8 is fixed at the planned position. The top support column 2 is inserted into the guide cylinder 8 through the loading and unloading port 81, and the top support column 2 is locked in the appropriate position using the fixing component 9. Next, the lifting hydraulic cylinder 83 is started to raise the support plate 82 to the preset height, preparing for subsequent lifting. Subsequently, the jacks 3 are started through the control system to gradually lift the steel box girder 01 to the target height. During this process, the verticality detection component 6 monitors the verticality of the jacks 3 in real time to ensure lifting accuracy. When synchronous lifting is required, multiple jacks 3 are connected through the telescopic connecting rod 72 to achieve multi-point coordinated lifting and ensure that the steel box girder 01 is subjected to uniform force. The entire device has a compact structure and is easy to operate, which can effectively improve the safety and efficiency of lifting construction.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary device for lifting steel box girders during construction, characterized in that... It includes a horizontal base (1) and several sets of vertically stacked top support columns (2). The several sets of top support columns (2) are evenly distributed on the horizontal base (1) along the circumference of the center of gravity of the steel box girder (01). The two vertically adjacent top support columns (2) in each set are coaxially inserted and matched. The top support column (2) at the highest point of each set is provided with a jack (3) electrically connected to the control system. A guide cylinder (8) is provided on the horizontal base (1) corresponding to each set of top support columns (2). The top support column (2) at the lowest point of each set is located in the guide cylinder (8). The side wall of the guide cylinder (8) is provided with a loading and unloading port (81) for inserting the top support column (2). A support plate (82) is raised and lowered in the guide cylinder (8). A fixing component (9) for clamping the top support column (2) is also provided on the guide cylinder (8).

2. The auxiliary device for lifting steel box girder construction according to claim 1, characterized in that... The pallet (82) and the guide cylinder (8) are vertically slidably coupled. A lifting hydraulic cylinder (83) is provided at the bottom of the guide cylinder (8). The piston rod of the lifting hydraulic cylinder (83) is vertically arranged, and the top end of the piston rod is connected to the bottom of the pallet (82).

3. The auxiliary device for lifting steel box girder construction according to claim 1, characterized in that... The top support column (2) is provided with multiple positioning grooves (21) around its circumference. The fixing component (9) includes multiple push rods (91) arranged around the top wall of the guide cylinder (8), a fixing plug (92) set at the end of the push rod (91), and a driving component (93) that drives the multiple push rods (91) to move synchronously toward the axis of the top support column (2). Each push rod (91) is slidably arranged on the top of the guide cylinder (8) along the radial direction of the guide cylinder (8). The fixing plug (92) corresponds to the positioning groove (21) one by one and is plugged in.

4. The auxiliary device for lifting steel box girder construction according to claim 3, characterized in that... The push rod (91) has threads all around its body. The drive component (93) includes a drive gear (931) that is rotatably mounted on the push rod (91) via the threads, a drive gear ring (932) that is rotatably mounted on the guide cylinder (8), a drive gear (933) that rotatably meshes with the drive gear ring (932), and a motor (934) that drives the drive gear (933) to rotate. The push rod (91) has a guide groove (911) on its side wall along its own axial direction. A guide key (84) is slidably disposed in the guide groove (911). The guide key (84) is disposed on the guide cylinder (8). The drive gear (931) is rotatably connected to the outer side wall of the guide cylinder (8), and multiple drive gears (931) rotatably mesh with the drive gear ring (932).

5. An auxiliary device for lifting steel box girder construction according to claim 1, characterized in that... The bottom of the steel box girder (01) is provided with a pad beam block (4) corresponding to each set of top support columns (2). The piston rod of the jack (3) is provided with a positioning sleeve (5) on which the pad beam block (4) is fitted. The pad beam block (4) and the positioning sleeve (5) are vertically inserted and matched.

6. An auxiliary device for lifting steel box girder construction according to claim 5, characterized in that... Each of the positioning sleeves (5) is provided with a verticality detection component (6). The verticality detection component (6) includes a rod (61) vertically installed on the outer wall of the positioning sleeve (5), a laser pointer (62) suspended on the rod (61) by a pull rope (611), and a scale (63) installed on the outer wall of the positioning sleeve (5). The scale (63) is located directly below the laser pointer (62).

7. An auxiliary device for lifting steel box girder construction according to claim 6, characterized in that... The positioning sleeve (5) is provided with a protective shell (51) covering the verticality detection component (6), and the protective shell (51) is transparent.

8. An auxiliary device for lifting steel box girder construction according to claim 1, characterized in that... The jack (3) is fitted with a connecting ring (7), and multiple fixing nuts (71) are distributed circumferentially on the connecting ring (7). The axial direction of each fixing nut (71) is arranged along the radial direction of the connecting ring (7). The brackets of two adjacent connecting rings (7) that are lifted synchronously are provided with telescopic connecting rods (72). The ends of the telescopic connecting rods (72) are connected to the fixing nuts (71) by thread rotation.

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