An adjustable elevation support for steel box girder installation

Abstract

This invention relates to the field of steel box girder installation and construction technology, and discloses a finely adjustable elevation support for steel box girder installation and construction. It includes a strip foundation, a standard support fixedly installed at the top of the strip foundation, a fixed support fixedly installed at the top of the standard support, a telescopic support at the top of the fixed support, and a sliding fit between the telescopic support and the fixed support. A steel spreader beam is fixedly installed at the top of the telescopic support, and a jack is installed at the top of the steel spreader beam. A support plate is fixedly installed at the output end of the jack. A pin is provided on the fixed support, and the telescopic support is fixedly connected to the fixed support via the pin. This invention allows for coarse adjustment of the support height through the sliding telescopic support and fine adjustment of the support fixation through the jack. The elevation adjustment of the support is convenient, eliminates the need for cutting operations in the air, has high safety, and is easy to use.

Description

Technical Field

[0001] This invention relates to the field of steel box girder installation and construction technology, specifically to an adjustable elevation support for steel box girder installation and construction. Background Technology

[0002] In recent years, steel box girders have been increasingly used in bridge construction, especially in urban overpasses and cross-track bridges. Steel box girders are generally constructed by welding together top plates, bottom plates, webs, transverse diaphragms, longitudinal diaphragms, and stiffening ribs. They are typically manufactured in sections according to the bridge alignment in a factory and then transported to the site for installation using scaffolding. Since different bridges have varying installation heights, scaffolding with different segment heights is needed to meet installation requirements. Furthermore, if the installation elevation deviation between segments is too large, stress concentration may occur at the segment connections after the bridge is completed. Therefore, improving the versatility of steel box girder installation scaffolding and achieving precise control of the steel box girder installation elevation are crucial considerations.

[0003] Currently, in the installation of steel box girders using the scaffolding method, the main approach is to install scaffolding at a certain height, then set up adjusting steel pipes on the steel spreader beams at the top of the scaffolding, and adjust the installation elevation by cutting the adjusting steel pipes. This method requires a large number of scaffolding segments of different heights, and also requires cutting operations at height. High-altitude cutting operations are quite dangerous, require a high level of cutting skills from the operators, and are not conducive to on-site safety construction and construction quality control.

[0004] Therefore, it is necessary to provide a finely adjustable elevation support for the installation and construction of steel box girders to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a finely adjustable elevation support for steel box girder installation, which enables high-precision steel box girder installation and improves the versatility of the installation support.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an adjustable elevation support for steel box girder installation, comprising strip foundations, two of which are arranged parallel to each other, the strip foundations being made of concrete, a standard support being fixedly installed at the top of each strip foundation, a fixed support being fixedly installed at the top of each standard support, a telescopic support being provided at the top of each fixed support, the telescopic support slidingly engaging with the fixed support, a steel spreader beam being fixedly installed at the top of each telescopic support, two of which are arranged parallel to each other, a jack being provided at the top of each steel spreader beam, a support plate being fixedly installed at the output end of each jack, pins being provided on the fixed support, and the telescopic support being fixedly connected to the fixed support via the pins.

[0007] A further feature of the present invention is that the fixed bracket has a plurality of first connecting holes, the telescopic bracket has a plurality of second connecting holes, and the pin passes through the first connecting holes and the second connecting holes.

[0008] A further configuration of the present invention is as follows: a working platform is fixedly installed on the fixed bracket, a ladder is fixedly installed on the standard bracket, a notch is provided on the working platform, and the top of the ladder is located directly below the notch.

[0009] A further feature of the present invention is that: an installation groove is provided on the steel spreader beam, an adjustment seat is provided in the installation groove, the jack is fixedly installed on the top of the adjustment seat, a connecting shaft is fixedly installed on both sides of the adjustment seat, the adjustment seat is rotatably installed in the installation groove through the connecting shaft, and an adjustable support assembly is provided on the top of the work platform.

[0010] A further configuration of the present invention is as follows: the adjustable support assembly includes a support cylinder and a support screw, the support cylinder is fixedly installed on the top of the working platform, the bottom end of the support screw extends into the support cylinder and is threadedly connected to the support cylinder, and a support seat is rotatably installed on the top end of the support screw, the support seat being located directly below the adjustment seat.

[0011] A further feature of the present invention is that a through hole is provided on the connecting shaft, and a fixing pin is provided in the through hole, the fixing pin passing through the steel spreader beam.

[0012] A further provision of the present invention is that a handwheel is fitted on the top of the support screw.

[0013] A further feature of the present invention is that a reinforcing seat is fixedly installed at the top of the support base, a protrusion is fixedly installed at the top of the reinforcing seat, and an adapter groove is provided on the bottom wall of the adjusting seat, wherein the protrusion is adapted to the adapter groove.

[0014] A further feature of the present invention is that: an installation ring is fixedly installed at the top of the jack, the output end of the jack passes through the installation ring, a sealing airbag is provided inside the installation ring, the sealing airbag is circular, the output end of the jack passes through the sealing airbag, an air supply pipe is connected to one side of the sealing airbag, an air supply mechanism is provided inside the adjusting seat, and the air supply mechanism is connected to the air supply pipe.

[0015] A further configuration of the present invention is as follows: the gas supply mechanism includes a cylinder, the cylinder is fixedly installed inside the adjusting seat, one end of the gas supply pipe is connected to the top end of the cylinder, a piston is slidably arranged inside the cylinder, a stopper rod is fixedly installed at the bottom end of the piston, the stopper rod extends into the adapter groove, a top plate is fixedly installed at the bottom end of the stopper rod, a spring is provided inside the cylinder, and the piston is elastically connected to the top wall of the cylinder through the spring.

[0016] In summary, the present invention has the following beneficial effects: During installation, a strip foundation is first laid out, then a standard bracket is fixedly installed on the top of the strip foundation, followed by a fixed bracket on the top of the standard bracket, and finally a telescopic bracket is installed on the standard bracket. The overall height of the bracket is adjusted by sliding the telescopic bracket. After adjustment, the telescopic bracket is locked. A steel spreader beam and a jack are installed sequentially on the telescopic bracket. The installation elevation can be finely adjusted by adjusting the jack, the height of the bracket can be coarsely adjusted by sliding the telescopic bracket, and the bracket can be finely fixed by using the jack. The elevation adjustment of the bracket is convenient, eliminating the need for cutting operations in the air, ensuring high safety, and making it easy to use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 For the present invention Figure 1 A magnified structural diagram at point A;

[0019] Figure 3 This is a cross-sectional structural diagram of the adjusting seat and adjustable support assembly of the present invention;

[0020] Figure 4 This is a cross-sectional structural diagram of the adjusting seat and jack of the present invention;

[0021] Figure 5 For the present invention Figure 4 A magnified structural diagram at point B;

[0022] Figure 6 For the present invention Figure 4 A magnified structural diagram at point C.

[0023] In the diagram: 1. Strip foundation; 2. Standard bracket; 3. Ladder; 4. Fixed bracket; 401. First connecting hole; 5. Telescopic bracket; 501. Second connecting hole; 6. Steel spreader beam; 7. Jack; 8. Working platform; 9. Pin; 10. Adjusting seat; 1001. Adaptor groove; 11. Connecting shaft; 12. Support cylinder; 13. Support screw; 14. Support seat; 15. Reinforcing seat; 16. Protrusion; 17. Mounting ring; 18. Sealing airbag; 19. Air supply pipe; 20. Cylinder; 21. Piston; 22. Spring; 23. Plug rod; 24. Top plate; 25. Support plate; 26. Fixing pin; 27. Handwheel. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] Example 1

[0026] Please see Figure 1 and Figure 2 In this embodiment of the invention, a finely adjustable elevation support for steel box girder installation includes a strip foundation 1, of which two strip foundations 1 are arranged parallel to each other. The strip foundations 1 are constructed by concrete pouring. A standard support 2 is fixedly installed at the top of each strip foundation 1. A fixed support 4 is fixedly installed at the top of each standard support 2. A telescopic support 5 is provided at the top of each fixed support 4, and the telescopic support 5 slides with the fixed support 4. A steel spreader beam 6 is fixedly installed at the top of each telescopic support 5. Two steel spreader beams 6 are arranged parallel to each other. A jack 7 is provided at the top of each steel spreader beam 6, and a support plate 25 is fixedly installed at the output end of each jack 7. The fixed support 4... The telescopic bracket 5 is fixedly connected to the fixed bracket 4 via pins 9. During installation, the strip foundation 1 is laid first, then the standard bracket 2 is fixedly installed on the top of the strip foundation 1, then the fixed bracket 4 is fixedly installed on the top of the standard bracket 2, and finally the telescopic bracket 5 is installed on the standard bracket 2. The overall height of the bracket is adjusted by sliding the telescopic bracket 5. After adjustment, the telescopic bracket 5 is locked. The steel spreader beam 6 and jack 7 are installed on the telescopic bracket 5 in sequence. The installation elevation can be finely adjusted by adjusting the jack 7, the bracket height can be coarsely adjusted by sliding the telescopic bracket 5, and the bracket can be finely fixed by adjusting the jack 7. The elevation adjustment of the bracket is relatively convenient, no cutting work is required in the air, the safety is high, and it is convenient to use.

[0027] In this embodiment, preferably, the fixed bracket 4 has a plurality of first connecting holes 401, and the telescopic bracket 5 has a plurality of second connecting holes 501. The pin 9 passes through the first connecting hole 401 and the second connecting hole 501. After adjusting the height of the telescopic bracket 5, the pin 9 can be inserted into the first connecting hole 401 and the second connecting hole 501 to fix the telescopic bracket 5 on the fixed bracket 4, thereby completing the installation and height adjustment of the telescopic bracket 5.

[0028] In this embodiment, preferably, a working platform 8 is fixedly installed on the fixed bracket 4, and a ladder 3 is fixedly installed on the standard bracket 2. The working platform 8 is provided with a notch, and the top of the ladder 3 is located directly below the notch. Construction workers can climb the ladder 3 to the notch and move to the working platform 8 through the notch to carry out construction on the working platform 8.

[0029] When installing the telescopic bracket 5, it is necessary to use hoisting equipment to fix the telescopic bracket 5 to the fixed bracket 4. It is also necessary to adjust the height of the telescopic bracket 5 according to the required height, and then insert the pin 9 into the first connecting hole 401 and the second connecting hole 501 for fixation. Adjusting the height of the telescopic bracket 5 using hoisting equipment is relatively difficult and affects the installation efficiency. Therefore, Embodiment 2 is provided.

[0030] Example 2

[0031] Please see Figure 3 and Figure 4 In this embodiment of the invention, the steel spreader beam 6 is provided with an installation groove, an adjustment seat 10 is provided in the installation groove, the jack 7 is fixedly installed on the top of the adjustment seat 10, and a connecting shaft 11 is fixedly installed on both sides of the adjustment seat 10. The adjustment seat 10 is rotatably installed in the installation groove through the connecting shaft 11, and an adjustable support assembly is provided on the top of the working platform 8.

[0032] In this embodiment, preferably, the adjustable support assembly includes a support cylinder 12 and a support screw 13. The support cylinder 12 is fixedly installed on the top of the working platform 8. The bottom end of the support screw 13 extends into the support cylinder 12 and is threadedly connected to the support cylinder 12. A support seat 14 is rotatably installed on the top end of the support screw 13. The support seat 14 is located directly below the adjusting seat 10. When installing the telescopic bracket 5, the telescopic bracket 5 is first hoisted above the fixed bracket 4 using hoisting equipment. Then, the adjusting seat 10 is manually rotated so that the output end of the jack 7 faces the support seat 14. Then, the height of the adjusting seat 10 is adjusted by rotating the support screw 13 so that the adjusting seat 10 contacts the support plate 25 at the output end of the jack 7. Then, the output end of the jack 7 is controlled to extend or retract according to the required height of the telescopic bracket 5, so that the telescopic bracket 5 rises or falls. After adjusting to the required height, the pin 9 is inserted into the first connecting hole 401 and the second connecting hole 501 to fix the telescopic bracket 5 to the fixed bracket 4. Through the setting of this embodiment, the jack 7 can not only achieve fine adjustment of the overall bracket height, but also assist in the installation of the telescopic bracket 5, making the installation of the telescopic bracket 5 more convenient.

[0033] In this embodiment, preferably, the connecting shaft 11 has a through hole, and a fixing pin 26 is provided in the through hole. The fixing pin 26 passes through the steel spreader beam 6. By inserting the fixing pin 26 into the through hole, the connecting shaft 11 can be fixed so that the connecting shaft 11 cannot rotate, thereby locking the adjusting seat 10 and improving the stability of the adjusting seat 10.

[0034] In this embodiment, preferably, a handwheel 27 is fitted on the top of the support screw 13, which can rotate the support screw 13 to more conveniently adjust the height of the support screw 13.

[0035] In this embodiment, preferably, a reinforcing seat 15 is fixedly installed at the top of the support seat 14, and a protrusion 16 is fixedly installed at the top of the reinforcing seat 15. The bottom wall of the adjusting seat 10 is provided with an adapter groove 1001, and the protrusion 16 is adapted to the adapter groove 1001. After the bracket is installed, the height of the reinforcing seat 15 and the protrusion 16 can be adjusted by rotating the support screw 13, so that the protrusion 16 is inserted into the adapter groove 1001, thereby providing auxiliary support to the bottom wall of the adjusting seat 10. On the one hand, this can prevent the adjusting seat 10 from rotating, thereby improving its firmness, and on the other hand, it can improve the compressive strength of the adjusting seat 10.

[0036] Example 3

[0037] Please see Figure 5 and Figure 6In this embodiment of the invention, an installation ring 17 is fixedly installed at the top of the jack 7, the output end of the jack 7 passes through the installation ring 17, a sealing airbag 18 is provided inside the installation ring 17, the sealing airbag 18 is configured as an annular shape, the output end of the jack 7 passes through the sealing airbag 18, an air supply pipe 19 is connected to one side of the sealing airbag 18, an air supply mechanism is provided inside the adjusting seat 10, and the air supply mechanism is connected to the air supply pipe 19.

[0038] In this embodiment, preferably, the gas supply mechanism includes a cylinder 20, which is fixedly installed inside the adjusting seat 10. One end of the gas supply pipe 19 is connected to the top end of the cylinder 20. A piston 21 is slidably disposed inside the cylinder 20. A stopper rod 23 is fixedly installed at the bottom end of the piston 21 and extends into the adapter groove 1001. A top plate 24 is fixedly installed at the bottom end of the stopper rod 23. A spring 22 is disposed inside the cylinder 20, and the piston 21 is elastically connected to the top wall of the cylinder 20 through the spring 22. When the protrusion 16 is inserted into the adapter groove 1001, the protrusion 16 pushes the top plate 24 upward, and the top plate 24 moves upward. When activated, the piston 21 moves upward via the stopper rod 23, thereby inputting the gas in the cylinder 20 into the gas supply pipe 19, and then into the sealing air bag 18 through the gas supply pipe 19. This causes the sealing air bag 18 to expand, and after expansion, the sealing air bag 18 fits against the output end of the jack 7, thus sealing the output end of the jack 7. This prevents external dust from entering the jack 7 through the gap at the output end, thus preventing dust from affecting the stability of the jack 7's operation. With the above structure, the output end of the jack 7 can be sealed in time when the protrusion 16 is inserted into the adapter groove 1001, without the need for manual operation, making it more convenient to use.

[0039] Working principle: During installation, first, a strip foundation 1 is laid out, then a standard bracket 2 is fixedly installed on the top of the strip foundation 1, then a fixed bracket 4 is fixedly installed on the top of the standard bracket 2, and finally, a telescopic bracket 5 is installed on the standard bracket 2. The overall height of the bracket is adjusted by sliding the telescopic bracket 5. After adjustment, the telescopic bracket 5 is locked. A steel spreader beam 6 and a jack 7 are installed on the telescopic bracket 5 in sequence. The installation elevation can be finely adjusted by adjusting the jack 7. When installing the telescopic bracket 5, the telescopic bracket 5 is first hoisted above the fixed bracket 4 using hoisting equipment. Then, the adjusting seat 10 is manually rotated so that the output end of the jack 7 faces the support seat 14. Then, the height of the adjusting seat 10 is adjusted by rotating the support screw 13 so that the adjusting seat 10 contacts the support plate 25 of the output end of the jack 7. Then, the output end of the jack 7 is controlled to extend and retract according to the required height of the telescopic bracket 5, thereby raising and lowering the telescopic bracket 5. After adjusting to the required height, the pin 9 is inserted into the first connecting hole 401 and the second connecting hole 402. The telescopic bracket 5 is fixedly connected to the fixed bracket 4 through the two connecting holes 501. After the bracket is installed, the height of the reinforcing seat 15 and the protrusion 16 can be adjusted by rotating the support screw 13, so that the protrusion 16 is inserted into the adapter groove 1001, thereby providing auxiliary support to the bottom wall of the adjusting seat 10. This not only prevents the adjusting seat 10 from rotating, thus improving its firmness, but also improves the compressive strength of the adjusting seat 10. When the protrusion 16 is inserted into the adapter groove 1001, the protrusion 16 pushes the top plate 24. When the top plate 24 moves upward, it drives the piston 21 to move upward through the stopper rod 23, thereby inputting the gas in the cylinder 20 into the gas supply pipe 19, and then into the sealing air bag 18 through the gas supply pipe 19, thereby causing the sealing air bag 18 to expand. After the sealing air bag 18 expands, it fits against the output end of the jack 7, thereby sealing the output end of the jack 7 to prevent external dust from entering the interior of the jack 7 through the gap at the output end of the jack 7, and to prevent dust from entering the interior of the jack 7 and affecting its working stability.

[0040] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A finely adjustable elevation support for steel box girder installation, comprising a strip foundation (1), characterized in that: A standard bracket (2) is fixedly installed at the top of the strip foundation (1), a fixed bracket (4) is fixedly installed at the top of the standard bracket (2), a telescopic bracket (5) is provided at the top of the fixed bracket (4), the telescopic bracket (5) and the fixed bracket (4) are slidably engaged, a steel flat beam (6) is fixedly installed at the top of the telescopic bracket (5), a jack (7) is provided at the top of the steel flat beam (6), a support plate (25) is fixedly installed at the output end of the jack (7), a pin (9) is provided on the fixed bracket (4), and the telescopic bracket (5) is fixedly connected to the fixed bracket (4) through the pin (9); The fixed bracket (4) has a plurality of first connecting holes (401), the telescopic bracket (5) has a plurality of second connecting holes (501), and the pin (9) passes through the first connecting hole (401) and the second connecting hole (501); A working platform (8) is fixedly installed on the fixed bracket (4); The steel spreader beam (6) is provided with an installation groove, and an adjustment seat (10) is provided in the installation groove. The jack (7) is fixedly installed on the top of the adjustment seat (10). A connecting shaft (11) is fixedly installed on both sides of the adjustment seat (10). The adjustment seat (10) is rotatably installed in the installation groove through the connecting shaft (11). An adjustable support assembly is provided at the top of the work platform (8). The adjustable support assembly includes a support cylinder (12) and a support screw (13). The support cylinder (12) is fixedly installed on the top of the working platform (8). The bottom end of the support screw (13) extends into the support cylinder (12) and is threadedly connected to the support cylinder (12). A support seat (14) is rotatably installed on the top of the support screw (13). The support seat (14) is located directly below the adjustment seat (10). A through hole is provided on the connecting shaft (11), and a fixing pin (26) is provided in the through hole. The fixing pin (26) passes through the steel spreader beam (6). A handwheel (27) is fitted on the top of the support screw (13); A reinforcing seat (15) is fixedly installed at the top of the support base (14), and a protrusion (16) is fixedly installed at the top of the reinforcing seat (15). An adapter groove (1001) is opened on the bottom wall of the adjusting seat (10), and the protrusion (16) is adapted to the adapter groove (1001). The top of the jack (7) is fixedly installed with an installation ring (17), the output end of the jack (7) passes through the installation ring (17), a sealing airbag (18) is provided inside the installation ring (17), the sealing airbag (18) is set as a ring, the output end of the jack (7) passes through the sealing airbag (18), a gas supply pipe (19) is provided on one side of the sealing airbag (18), a gas supply mechanism is provided inside the adjusting seat (10), and the gas supply mechanism is connected to the gas supply pipe (19).

2. The adjustable elevation support for steel box girder installation according to claim 1, characterized in that: A ladder (3) is fixedly installed on the standard bracket (2), and a notch is provided on the work platform (8). The top of the ladder (3) is located directly below the notch.

3. The adjustable elevation support for steel box girder installation according to claim 1, characterized in that: The gas delivery mechanism includes a cylinder (20), which is fixedly installed inside the adjusting seat (10). One end of the gas delivery pipe (19) is connected to the top of the cylinder (20). A piston (21) is slidably installed inside the cylinder (20). A piston rod (23) is fixedly installed at the bottom end of the piston (21). The piston rod (23) extends into the adapter groove (1001). A top plate (24) is fixedly installed at the bottom end of the piston rod (23). A spring (22) is installed inside the cylinder (20). The piston (21) is elastically connected to the top wall of the cylinder (20) through the spring (22).

Images