Rapid splicing mechanism and splicing method for steel box girder

Abstract

The invention belongs to the technical field of bridge construction, and particularly relates to a rapid steel box girder splicing mechanism and method.The rapid steel box girder splicing mechanism comprises a pushing machine, the pushing machine comprises a machine body and a jacking air cylinder, the jacking air cylinder is installed on the lower surface of the machine body, a supporting mechanism is installed on the surface of the lower end of the pushing machine, and the supporting mechanism comprises a movable base; the movable base is disc-shaped; a deflection mechanism is installed in the movable base and comprises a worm gear. According to the rapid assembling mechanism and method for the steel box girder, the supporting mechanism is arranged to movably support the pushing machine, so that when the pushing machine needs to rotate, the pushing machine can rotate on the surface of the fixed base along with the movable base by retracting a jacking air cylinder, and when the pushing machine needs to be kept stable, the pushing machine can be fixed through stretching of the jacking air cylinder; and the pushing machine and the movable base are lifted upwards, so that deflection of the pushing machine is avoided, and the characteristic that deflection of the pushing machine is convenient to control is achieved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a rapid assembly mechanism and splicing method for steel box girders. Background Technology

[0002] During bridge construction, in order to quickly assemble steel box girders, the angle of the steel box girders needs to be pre-adjusted before being hoisted onto the surface of the jacking machine. The jacking machine then pushes the girders for assembly. However, during the hoisting process, due to swaying and other uncontrollable factors, the steel box girders are prone to deflection before being placed on the surface of the jacking machine, which leads to inaccurate assembly. Therefore, it is necessary to adjust the angle of the steel box girders as the last step before assembly on the surface of the jacking machine, thereby reducing the assembly time of the steel box girders. Summary of the Invention

[0003] To address the technical problem that existing steel box girders are prone to deflection before assembly, leading to a decrease in assembly efficiency, this invention proposes a rapid assembly mechanism and splicing method for steel box girders.

[0004] This invention proposes a rapid assembly mechanism for steel box girders, including a jacking machine. The jacking machine includes a machine body and a lifting cylinder. The lifting cylinder is installed on the lower surface of the machine body. A support mechanism is installed on the lower surface of the jacking machine. The support mechanism includes a movable base, which is disc-shaped. A deflection mechanism is installed inside the movable base. The deflection mechanism includes a worm gear, and a fixed shaft is fixedly connected to the upper surface of the worm gear.

[0005] Preferably, the upper surface of the movable base is provided with a slot, the lower surface of the machine body is fixedly connected to the upper surface of the movable base, and the lower ends of the plurality of lifting cylinders are slidably inserted into the inner walls of the plurality of slots respectively.

[0006] Preferably, a limiting ring is fixedly sleeved on the outer surface of the movable base. The limiting ring has a T-shaped cross-section, and a fixed base is slidably sleeved on the lower end of the limiting ring. The fixed base is disc-shaped.

[0007] Preferably, the upper surface edge of the fixed base is provided with a rotating groove, and a plurality of rotating grooves are arranged in a circular array on the upper surface of the fixed base with the axis of the fixed base as the array center. The inner walls of the plurality of rotating grooves are rotatably connected to rollers, and the upper end surface of the rollers is slidably connected to the lower surface of the movable base.

[0008] Preferably, an adjustment groove is provided at the center of the lower surface of the movable base, the surface of the fixed shaft is fixedly inserted into the surface of the movable base, the worm gear is located inside the adjustment groove, and a sliding groove is provided on the upper surface of the fixed base, the sliding groove being inclined.

[0009] Preferably, the inner wall of the groove is slidably connected to an installation rod, the upper end of the installation rod is fixedly connected to a first transmission mechanism, both ends of the first transmission mechanism are connected to worm gears, the two worm gears are respectively located at both ends of a worm wheel, and one of the first transmission mechanisms is connected to a second transmission mechanism on its surface.

[0010] Preferably, the fixed base has an internal mounting groove, and a servo motor is slidably connected to the inner bottom wall of the mounting groove. The output shaft of the servo motor is connected to the lower end of the second transmission mechanism.

[0011] Preferably, the upper end of the mounting groove is connected to the lower end of the sliding groove, and the lower ends of the two mounting rods are fixedly connected to push rods. A limiting groove is opened inside the push rod, and a limiting block is slidably connected inside the limiting groove.

[0012] Preferably, a push cylinder is fixedly connected to the inner sidewall of the mounting groove, and the movable end surface of the push cylinder is fixedly connected to the surface of the limiting block.

[0013] An assembly method for a rapid assembly mechanism of a steel box girder, comprising the following steps: Step 1: Start the jacking machine, the jacking machine controls the jacking cylinder to retract, the lower surface of the piston end of the jacking cylinder separates from the upper surface of the fixed base, start the jacking cylinder, the piston end of the jacking cylinder extends, the jacking cylinder pushes the push rod through the limiting block, the push rod pushes the first transmission mechanism through the mounting rod, the mounting rod is deflected under the guidance of the inner wall of the slide groove, the mounting rod drives the push rod to deflect, and the limiting groove inside the push rod slides on the surface of the limiting block;

[0014] Step 2: The first transmission mechanism moves through the second transmission mechanism to drive the servo motor to slide on the inner bottom wall of the mounting slot. The first transmission mechanism drives one of the worms to mesh with the surface of the worm wheel and drives the other worm to separate from the worm wheel. The servo motor is started. The servo motor drives the first transmission mechanism through the second transmission mechanism. The first transmission mechanism drives the two worms to rotate. The worm drives the worm wheel to rotate. The worm wheel drives the movable base and the pusher to rotate through the fixed shaft.

[0015] Step 3: Turn off the servo motor and the jacking cylinder, move the steel box girder to the upper surface of the jacking machine, start the jacking machine, and the jacking machine controls the piston end of the lifting cylinder to extend downward. The piston end of the lifting cylinder supports the steel box girder by pressing against the upper surface of the fixed base. The jacking machine is used to transport and splice the steel box girder.

[0016] Step four: When it is necessary to change the pushing angle of the jacking machine, retract the piston end of the jacking cylinder. The jacking cylinder pushes the push rod through the limit block. The push rod pushes the first transmission mechanism through the mounting rod. Under the guidance of the inner wall of the slide groove, the mounting rod offsets in the opposite direction. The mounting rod drives the push rod to offset. The limit groove inside the push rod slides on the surface of the limit block. The first transmission mechanism drives another worm to mesh with the surface of the worm wheel. When the worm and worm wheel are separated, after the servo motor is started, the rotation direction of the worm wheel is reversed. The worm wheel drives the jacking machine to rotate in the opposite direction through the fixed shaft.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. By setting up a support mechanism to provide movable support for the jacking machine, when the jacking machine needs to rotate, the jacking machine can rotate on the surface of the fixed base along with the movable base by retracting the lifting cylinder. When the jacking machine needs to be kept stable, the jacking cylinder can be extended to lift the jacking machine and the movable base upward, thereby preventing the jacking machine from deflecting. This makes it easy to control the deflection of the jacking machine.

[0019] 2. By installing a deflection mechanism inside the movable base, the worm gear in the deflection mechanism drives the worm wheel at the lower end of the movable base to rotate. In turn, the worm wheel drives the pusher and the movable base to rotate. At the same time, the self-locking characteristic of the worm wheel and worm gear prevents the pusher from deflecting unexpectedly. By using double worm gears to drive the worm wheel from different directions, it is easy to control the rotation direction of the worm wheel. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a rapid assembly mechanism and splicing method for steel box girders proposed in this invention;

[0021] Figure 2 This is a cross-sectional view of the movable base structure of the rapid assembly mechanism and splicing method for steel box girders proposed in this invention;

[0022] Figure 3 This is an inverted view of the movable base structure of the rapid assembly mechanism and splicing method for steel box girders proposed in this invention;

[0023] Figure 4 This is a perspective view of the worm gear structure of a rapid assembly mechanism and splicing method for steel box girders proposed in this invention.

[0024] Figure 5 This is a perspective view of the fixed base structure of a rapid assembly mechanism and splicing method for steel box girders proposed in this invention;

[0025] Figure 6 This is a perspective view of the worm gear structure of a rapid assembly mechanism and splicing method for steel box girders proposed in this invention.

[0026] Figure 7 This is a cross-sectional view of the pusher structure of a rapid assembly mechanism and splicing method for steel box girders proposed in this invention;

[0027] Figure 8 This is a cross-sectional view of the first transmission mechanism of a rapid assembly mechanism and splicing method for steel box girders proposed in this invention.

[0028] In the diagram: 1. Machine body; 2. Lifting cylinder; 3. Movable base; 31. Limiting ring; 32. Fixed base; 33. Roller shaft; 4. Worm gear; 41. Fixed shaft; 42. Slide groove; 43. Mounting rod; 44. First transmission mechanism; 45. Worm gear; 46. Second transmission mechanism; 47. Servo motor; 5. Push rod; 6. Limiting block; 7. Lifting cylinder. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Reference Figures 1-8 A rapid assembly mechanism and method for steel box girders includes a jacking machine, which includes a machine body 1 and a lifting cylinder 2. The lifting cylinder 2 is installed on the lower surface of the machine body 1. A support mechanism is installed on the lower end surface of the jacking machine. The support mechanism includes a movable base 3, which is disc-shaped. A deflection mechanism is installed inside the movable base 3. The deflection mechanism includes a worm gear 4, and a fixed shaft 41 is fixedly connected to the upper surface of the worm gear 4.

[0031] For the jacking machine to be installed flexibly, slots are provided on the upper surface of the movable base 3. The lower surface of the machine body 1 is fixedly connected to the upper surface of the movable base 3. The lower ends of multiple lifting cylinders 2 are slidably inserted into the inner walls of multiple slots. By using the fixed connection between the surface of the machine body 1 and the surface of the movable base 3, it is easy for the movable base 3 to rotate together with the machine body 1. A limit ring 31 is fixedly sleeved on the outer surface of the movable base 3. The limit ring 31 has a T-shaped cross-section. A fixed base 32 is slidably sleeved on the lower end of the limit ring 31. The fixed base 32 is disc-shaped. The limit ring 31 is used to secure the fixed base 32 and the movable base 32. The movable base 3 is movably connected to the fixed base 32, which allows the fixed base 32 to limit the rotation of the movable base 3. The upper surface edge of the fixed base 32 is provided with a rotation groove. Multiple rotation grooves are arranged in a ring array on the upper surface of the fixed base 32 with the axis of the fixed base 32 as the array center. The inner wall of each of the multiple rotation grooves is rotatably connected to a roller 33. The upper end surface of the roller 33 is slidably connected to the lower surface of the movable base 3. The roller 33 is used to space between the movable base 3 and the fixed base 32, thereby reducing the friction between the movable base 3 and the fixed base 32 through the rotation of the roller 33.

[0032] By setting up a support mechanism to provide movable support for the jacking machine, when the jacking machine needs to rotate, the jacking machine can rotate on the surface of the fixed base 32 along with the movable base 3 by retracting the lifting cylinder 2. When the jacking machine needs to be kept stable, the jacking cylinder 2 can be extended to lift the jacking machine and the movable base 3 upward, thereby preventing the jacking machine from deflecting. This makes it easy to control the deflection of the jacking machine.

[0033] To deflect the jacking machine, an adjustment groove is provided at the center of the lower surface of the movable base 3. The surface of the fixed shaft 41 is fixedly inserted into the surface of the movable base 3. The worm gear 4 is located inside the adjustment groove. A sliding groove 42 is provided on the upper surface of the fixed base 32. The sliding groove 42 is inclined. The inclined shape of the sliding groove 42 facilitates the oblique displacement of the mounting rod 43 and the worm gear 45 on its surface, thereby facilitating the separation of the worm gear 45 from the worm wheel 4. The mounting rod 43 is slidably connected to the inner wall of the sliding groove 42. The upper end of the mounting rod 43 is fixedly connected to the first transmission mechanism 44. Both ends of the first transmission mechanism 44 are driven by worm gears 45. The two worm gears 45 are located at the two ends of the worm wheel 4, respectively. The surface of the 44 is connected to the second transmission mechanism 46. Two worm gears 45 are located at the two ends of the worm wheel 4 respectively, so that when the two worm gears 45 drive the worm wheel 4 respectively, the rotation direction of the worm wheel 4 is opposite. The fixed base 32 has a mounting groove inside, and the inner bottom wall of the mounting groove is slidably connected to the servo motor 47. The output shaft of the servo motor 47 is connected to the lower end of the second transmission mechanism 46. The servo motor 47 is used as a power source, which facilitates the rotation of the worm wheel 4. A sliding plate can also be installed at the bottom of the servo motor 47 to reduce the resistance when the servo motor 47 moves. The first transmission mechanism 44 and the second transmission mechanism 46 both include a housing, a transmission wheel and a transmission belt. The transmission belt is composed of two transmission wheels sleeved inside the housing.

[0034] By installing a deflection mechanism inside the movable base 3, the worm gear 45 in the deflection mechanism drives the worm wheel 4 at the lower end of the movable base 3 to rotate. In turn, the worm wheel 4 drives the pusher and the movable base 3 to rotate. At the same time, the self-locking characteristic of the worm wheel 4 and the worm gear 45 prevents the pusher from deflecting unexpectedly. By using two worm gears 45 to drive the worm wheel 4 from different directions, it is easy to control the rotation direction of the worm wheel 4.

[0035] The upper end of the mounting groove is connected to the lower end of the slide 42. The lower ends of the two mounting rods 43 are fixedly connected to push rods 5. The push rods 5 have a limiting groove inside, and a limiting block 6 is slidably connected inside the limiting groove. The push rods 5 are used to connect the two mounting rods 43, so that the push rods 5 can be pushed to drive the two mounting rods 43. The inner side wall of the mounting groove is fixedly connected to a push cylinder 7. The moving end surface of the push cylinder 7 is fixedly connected to the surface of the limiting block 6. The push cylinder drives the push rod 5 through the limiting block 6, so that the mounting rods 43 can slide in the slide 42.

[0036] Working principle: Step 1, start the jacking machine, the jacking machine controls the jacking cylinder 2 to retract, the lower surface of the piston end of the jacking cylinder 2 separates from the upper surface of the fixed base 32, start the jacking cylinder 7, the piston end of the jacking cylinder 7 extends, the jacking cylinder 7 pushes the push rod 5 through the limit block 6, the push rod 5 pushes the first transmission mechanism 44 through the mounting rod 43, the mounting rod 43 is deflected under the guidance of the inner wall of the slide groove 42, the mounting rod 43 drives the push rod 5 to deflect, the limit groove in the push rod 5 slides on the surface of the limit block 6;

[0037] Step 2: The first transmission mechanism 44 moves through the second transmission mechanism 46 to drive the servo motor 47 to slide on the inner bottom wall of the mounting slot. The first transmission mechanism 44 drives one of the worms 45 to mesh with the surface of the worm wheel 4, and drives the other worm 45 to separate from the worm wheel 4. The servo motor 47 is started. The servo motor 47 drives the first transmission mechanism 44 through the second transmission mechanism 46. The first transmission mechanism 44 drives the two worms 45 to rotate. The worms 45 drive the worm wheel 4 to rotate. The worm wheel 4 drives the movable base 3 and the pusher to rotate through the fixed shaft 41.

[0038] Step 3: Turn off the servo motor 47 and the jacking cylinder 7, move the steel box beam to the upper surface of the jacking machine, start the jacking machine, the jacking machine controls the piston end of the lifting cylinder 2 to extend downward, the piston end of the lifting cylinder 2 is supported by pressing against the upper surface of the fixed base 32, and the steel box beam is transported and spliced ​​by the jacking machine.

[0039] Step four: When it is necessary to change the pushing angle of the pusher, retract the piston end of the pusher cylinder 7. The pusher cylinder 7 pushes the push rod 5 through the limit block 6. The push rod 5 pushes the first transmission mechanism 44 through the mounting rod 43. The mounting rod 43 is guided by the inner wall of the slide groove 42 to offset in the opposite direction. The mounting rod 43 drives the push rod 5 to offset. The limit groove in the push rod 5 slides on the surface of the limit block 6. The first transmission mechanism 44 drives another worm 45 to mesh with the surface of the worm wheel 4. At present, the worm 45 and the worm wheel 4 are separated. After the servo motor 47 is started, the rotation direction of the worm wheel 4 is reversed. The worm wheel 4 drives the pusher to rotate in the opposite direction through the fixed shaft 41.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rapid assembly mechanism for steel box girders, comprising a jacking machine, the jacking machine comprising a body (1) and a lifting cylinder (2), the lifting cylinder (2) being mounted on the lower surface of the body (1), characterized in that: The lower surface of the pusher is equipped with a support mechanism, which includes a movable base (3) that is disc-shaped. The movable base (3) is equipped with a deflection mechanism, which includes a worm gear (4) and a fixed shaft (41) is fixedly connected to the upper surface of the worm gear (4).

2. The rapid assembly mechanism for steel box girders according to claim 1, characterized in that: The upper surface of the movable base (3) is provided with a slot, the lower surface of the body (1) is fixedly connected to the upper surface of the movable base (3), and the lower ends of the multiple lifting cylinders (2) are respectively slidably inserted into the inner wall of the multiple slots.

3. The rapid assembly mechanism for steel box girders according to claim 2, characterized in that: The outer surface of the movable base (3) is fixedly fitted with a limiting ring (31), the cross section of the limiting ring (31) is T-shaped, and the lower end of the limiting ring (31) is slidably fitted with a fixed base (32), the fixed base (32) is disc-shaped.

4. The rapid assembly mechanism for steel box girders according to claim 3, characterized in that: The upper surface edge of the fixed base (32) is provided with a rotating groove. Multiple rotating grooves are arranged in a ring array on the upper surface of the fixed base (32) with the axis of the fixed base (32) as the array center. The inner walls of the multiple rotating grooves are rotatably connected to rollers (33). The upper surface of the rollers (33) is slidably connected to the lower surface of the movable base (3).

5. The rapid assembly mechanism for steel box girders according to claim 4, characterized in that: An adjustment groove is provided at the center of the lower surface of the movable base (3). The surface of the fixed shaft (41) is fixedly inserted into the surface of the movable base (3). The worm gear (4) is located inside the adjustment groove. A sliding groove (42) is provided on the upper surface of the fixed base (32). The sliding groove (42) is inclined.

6. The rapid assembly mechanism for steel box girders according to claim 5, characterized in that: The inner wall of the groove (42) is slidably connected to an installation rod (43), and the upper end of the installation rod (43) is fixedly connected to a first transmission mechanism (44). Both ends of the first transmission mechanism (44) are connected to worm gears (45), and the two worm gears (45) are located at the two ends of the worm wheel (4). The surface of one of the first transmission mechanisms (44) is connected to a second transmission mechanism (46).

7. A rapid assembly mechanism for steel box girders according to claim 6, characterized in that: The fixed base (32) has an installation groove inside, and a servo motor (47) is slidably connected to the inner bottom wall of the installation groove. The output shaft of the servo motor (47) is connected to the lower end of the second transmission mechanism (46).

8. The rapid assembly mechanism for steel box girders according to claim 7, characterized in that: The upper end of the mounting groove is connected to the lower end of the sliding groove (42), and the lower ends of the two mounting rods (43) are fixedly connected to push rods (5). A limiting groove is opened inside the push rod (5), and a limiting block (6) is slidably connected inside the limiting groove.

9. A rapid assembly mechanism for steel box girders according to claim 8, characterized in that: A push cylinder (7) is fixedly connected to the inner side wall of the mounting groove, and the movable end surface of the push cylinder (7) is fixedly connected to the surface of the limiting block (6).

10. The assembly method of a steel box girder rapid assembly mechanism according to any one of claims 1-9, the assembly method is as follows: Step 1, start the jacking machine, the jacking machine controls the jacking cylinder (2) to retract, the lower surface of the piston end of the jacking cylinder (2) separates from the upper surface of the fixed base (32), start the jacking cylinder (7), the piston end of the jacking cylinder (7) extends, the jacking cylinder (7) pushes the push rod (5) through the limiting block (6), the push rod (5) pushes the first transmission mechanism (44) through the mounting rod (43), the mounting rod (43) deviates under the guidance of the inner wall of the slide groove (42), the mounting rod (43) drives the push rod (5) to deviate, and the limiting groove in the push rod (5) slides on the surface of the limiting block (6); Step 2: The first transmission mechanism (44) moves through the second transmission mechanism (46) to drive the servo motor (47) to slide on the inner bottom wall of the mounting slot. The first transmission mechanism (44) drives one of the worms (45) to mesh with the surface of the worm wheel (4) and drives the other worm (45) to separate from the worm wheel (4). The servo motor (47) is started. The servo motor (47) drives the first transmission mechanism (44) through the second transmission mechanism (46). The first transmission mechanism (44) drives the two worms (45) to rotate. The worms (45) drive the worm wheel (4) to rotate. The worm wheel (4) drives the movable base (3) and the pusher to rotate through the fixed shaft (41). Step 3: Turn off the servo motor (47) and the jacking cylinder (7), move the steel box beam to the upper surface of the jacking machine, start the jacking machine, the jacking machine controls the piston end of the lifting cylinder (2) to extend downward, the piston end of the lifting cylinder (2) is supported by pressing against the upper surface of the fixed base (32), and the steel box beam is transported and spliced ​​by the jacking machine. Step 4: When it is necessary to change the pushing angle of the pusher, retract the piston end of the pusher cylinder (7). The pusher cylinder (7) pushes the push rod (5) through the limit block (6). The push rod (5) pushes the first transmission mechanism (44) through the mounting rod (43). The mounting rod (43) is deflected in the opposite direction under the guidance of the inner wall of the slide groove (42). The mounting rod (43) drives the push rod (5) to deflect. The limit groove in the push rod (5) slides on the surface of the limit block (6). The first transmission mechanism (44) drives another worm (45) to mesh with the surface of the worm wheel (4). When the worm (45) and the worm wheel (4) are separated, after the servo motor (47) is started, the rotation direction of the worm wheel (4) is reversed. The worm wheel (4) drives the pusher to rotate in the opposite direction through the fixed shaft (41).

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