Special lifting equipment for truss bridge

Abstract

The utility model relates to special lifting equipment for a truss bridge, which is characterized in that the special lifting equipment comprises a lifting tower, a bridge lifting unit and a bridge lifting transmission unit, a plurality of groups of limit brackets which are arranged separately are arranged on the lifting tower in the height direction of the lifting tower, and the lifting tower is provided with a lifting channel; the bridge lifting unit comprises a lifting frame rotationally connected with the end of a bridge, the lifting frame is located in a lifting channel of the lifting tower, the bridge lifting transmission unit comprises an electric capstan, a traction rope, a first pulley block and a second pulley block, and the electric capstan and the first pulley block are both arranged at the top of the lifting tower. The second pulley block is arranged at the top of the lifting frame, one end of the traction rope is fixedly connected with a winding disc of the electric capstan, the other end of the traction rope is connected with the second pulley block, and meanwhile the traction rope is further in transmission connection with the first pulley block. The height adjusting device is simple in structure, low in manufacturing cost and convenient to operate, and the height of at least two-stage steel-crossing structures can be adjusted according to the fall requirement.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lifting device, in particular to a special lifting device of truss bridge. BACKGROUND

[0002] In order to improve the intercommunication efficiency of the wharf pontoon and the shore base, a bridge needs to be erected between the pontoon and the shore base, and the common bridge erection mode mainly includes a suspension bridge, a floating bridge or a steel structure truss bridge matched with a ladder.

[0003] Due to the change of water level with seasons, the water level will rise or fall, and there is a certain height difference between the pontoon and the shore base. If the suspension bridge is erected, the end of the suspension bridge needs to be embedded with the pontoon, which has certain requirements for span and drop, and when the span is too large, the bridge deck will sink into the water, so the suspension bridge is not suitable for large span and large drop. If the floating bridge is erected, the buckets or ships are used as piers between the pontoon and the shore base to lay the bridge, and the buckets or ships can be disassembled according to the water level to adjust the length of the bridge. However, the disassembly process of the floating bridge is very complicated, the adaptability is poor, and there is a certain safety hazard. If the steel truss bridge is erected, the pier needs to be built near the pontoon, which not only involves underwater construction, but also needs to set up a ladder, which has high cost and safety hazards. If the single-span steel structure bridge is used, the bridge body is large under the premise of ensuring the safety of the bridge, and the weight and construction cost are high. In addition, since one end of the bridge body is on the pontoon, it will cause safety hazards to the stability of the pontoon.

[0004] Therefore, in order to solve the problem of large span between the pontoon and the shore base, and considering that the bridge can adapt to the actual situation of large drop, it is necessary to design a special lifting device which can adjust the height of at least two levels of steel structure according to the drop requirement, which is convenient to operate and can reduce the cost. SUMMARY

[0005] The utility model aims at providing a special lifting device of truss bridge which not only has simple structure and low cost, but also is convenient to operate and can adjust the height of at least two levels of steel structure according to the drop requirement.

[0006] In order to achieve the above purpose, the technical scheme of the utility model is as follows: a special lifting device of truss bridge, which is characterized by comprising a lifting tower, a bridge lifting unit and a bridge lifting transmission unit,

[0007] A plurality of groups of separate limiting corbels are arranged on the lifting tower and along the height direction of the lifting tower, and the lifting tower has a lifting channel,

[0008] The bridge lifting unit comprises a lifting frame rotatably connected with the end of the bridge, and the lifting frame is located in the lifting channel of the lifting tower,

[0009] The bridge lifting transmission unit comprises an electric winch, a traction rope, a first pulley block and a second pulley block, the electric winch and the first pulley block are arranged at the top of the lifting tower, the second pulley block is arranged at the top of the lifting frame, one end of the traction rope is fixedly connected with the winding disc of the electric winch, the other end is connected with the second pulley block, and the traction rope is further in transmission connection with the first pulley block,

[0010] The electric winch is driven to act, so as to drive the traction rope to wind or unwind, and synchronously drive the lifting frame to ascend or descend in the lifting channel, so that the lifting frame is supported on the limiting corbels at the corresponding height, and the lifting of the bridge is completed.

[0011] In the above technical solution, the lifting frame comprises a ridge beam, a connecting platform and a plurality of lifting columns, the top and bottom of the plurality of lifting columns are fixedly connected with the ridge beam and the connecting platform respectively, the second pulley block is arranged on the ridge beam, and a supporting beam for supporting the lifting frame on the limiting corbel is further arranged on the connecting platform, and the supporting beam is in sliding cooperation with the connecting platform.

[0012] In the above technical solution, the lifting frame further comprises a reinforcing beam for reinforcing the overall strength, and the two ends of the reinforcing beam are fixedly connected with the corresponding lifting columns respectively.

[0013] In the above technical solution, the lifting frame has a connecting platform rotatably connected with the end of the bridge, the connecting platform is provided with a transmission mechanism and a supporting beam, the supporting beam is in sliding cooperation with the sliding groove of the connecting platform, and the transmission mechanism is in transmission connection with the supporting beam, the transmission mechanism is driven to act, so that the supporting beam slides to the limit position and is located on the inner side of the limiting corbel along the sliding groove of the connecting platform under the action of the transmission mechanism, thereby avoiding the interference between the lifting frame and the limiting corbel during the lifting process.

[0014] In the above technical solution, the transmission mechanism is an electric motor or an air cylinder, when the transmission mechanism is the electric motor, the transmission shaft of the electric motor is in transmission connection with the supporting beam through the linear guide rail, and when the transmission mechanism is the air cylinder, the top rod of the air cylinder is connected with the supporting beam.

[0015] In the above technical solution, the lifting tower comprises a tower platform and four tower columns fixedly connected with the ground foundation, the tower platform is fixedly connected with the four tower columns, the electric winch and the first pulley block are arranged on the tower platform of the lifting tower, the four tower columns enclose the lifting channel for lifting the lifting frame, and a plurality of limiting corbels are arranged on the inner side wall of each tower column in the height direction, and the four limiting corbels at the same height are located on the same plane.

[0016] In the above technical scheme, the lifting frame is provided with a hinged support connected with the end of the bridge through a hinge.

[0017] The truss bridge special lifting equipment has the following advantages: the truss bridge special lifting equipment comprises a lifting tower, a bridge lifting unit and a bridge lifting transmission unit,

[0018] A plurality of groups of separate limiting brackets are arranged on the lifting tower and along the height direction of the lifting tower, and the lifting tower has a lifting passage,

[0019] The bridge lifting unit comprises a lifting frame rotatably connected with the end of the bridge, and the lifting frame is located in the lifting passage of the lifting tower,

[0020] The bridge lifting transmission unit comprises an electric winch, a traction rope, a first pulley block and a second pulley block, the electric winch and the first pulley block are arranged on the top of the lifting tower, the second pulley block is arranged on the top of the lifting frame, one end of the traction rope is fixedly connected with the winding disc of the electric winch, the other end is connected with the second pulley block, and the traction rope is also in transmission connection with the first pulley block,

[0021] Taking the erection of two-stage bridges between the shore base and the pontoon as an example, in use, one end of the first-stage bridge is connected with the connecting mechanism at the side of the shore base, the other end is rotatably connected with the lifting frame, one end of the second-stage bridge is connected with the connecting mechanism on the pontoon, and the other end is rotatably connected with the lifting frame, according to the drop requirement, the height of the end of the bridge rotatably connected with the lifting frame is adjusted by using the bridge lifting transmission unit, specifically, the electric winch is driven to act, the traction rope is wound or unwound, and the lifting frame is simultaneously lifted or lowered in the lifting passage, so that the lifting frame is supported on the limiting bracket at the corresponding height, the lifting of the bridge is completed, and even if the water level rises or falls, the special lifting equipment can ensure that the bridge is above the water surface.

[0022] By using the special lifting equipment, at least two-stage truss bridge structures can be erected between the shore base and the pontoon, the large-span problem of the pontoon and the shore base is solved, the bridge can adapt to large drop conditions, compared with the single-span steel structure bridge, the cost is low, the operation is very convenient, and the height requirement of the at least two-stage steel structure can be adjusted according to the drop requirement. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of one specific embodiment of the utility model;

[0024] Figure 2 is a state schematic diagram of the utility model in use. DETAILED DESCRIPTION

[0025] The utility model is further explained below in combination with the drawings and the embodiments given below, but is not limited to the same.

[0026] As shown in Figure 1 , 2 , a special lifting equipment for truss bridge, comprising a lifting tower 1, a bridge lifting unit 2 and a bridge lifting transmission unit 3,

[0027] A plurality of groups of separate limiting corbels 10 are arranged on the lifting tower 1 and along the height direction thereof, and the lifting tower 1 has a lifting channel,

[0028] The bridge lifting unit 2 comprises a lifting frame 21 rotatably connected with the end of the bridge, and the lifting frame 21 is located in the lifting channel of the lifting tower 1,

[0029] The bridge lifting transmission unit 3 comprises an electric winch 31, a traction rope 32, a first pulley block 33 and a second pulley block 34, the electric winch 31 and the first pulley block 33 are both arranged at the top of the lifting tower 1, the second pulley block 34 is arranged at the top of the lifting frame 21, one end of the traction rope 32 is fixedly connected with the winding disc of the electric winch 31, the other end is connected with the second pulley block 34, and simultaneously, the traction rope 32 is also in transmission connection with the first pulley block 33,

[0030] The electric winch 31 is driven to act, so as to drive the traction rope 32 to wind or unwind, and simultaneously drive the lifting frame 21 to ascend or descend in the lifting channel, so that the lifting frame 21 is supported on the limiting corbel 10 at the corresponding height, and the lifting of the bridge is completed.

[0031] Further, as shown in Figure 1 , in order to ensure the stability and smoothness of the lifting frame during the lifting of the end of the bridge, the lifting frame 21 comprises a ridge beam 211, a connecting platform 212 and a plurality of lifting columns 213, the top and bottom of the plurality of lifting columns 213 are fixedly connected with the ridge beam 211 and the connecting platform 212 respectively, the second pulley block 34 is arranged on the ridge beam 211, and the connecting platform 212 is further provided with a supporting beam 5 for supporting the lifting frame 21 as a whole on the limiting corbel 10, and the supporting beam 5 is in sliding cooperation with the connecting platform 212, so that the supporting beam 5 can be manually moved inward to avoid interference with the limiting corbel during the overall lifting of the lifting frame 21.

[0032] Further, as shown in Figure 1 , in order to further improve the rigidity of the lifting frame as a whole, the lifting frame 21 further comprises a reinforcing beam 214 for reinforcing the overall strength, and the two ends of the reinforcing beam 214 are fixedly connected with the corresponding lifting columns 213 respectively.

[0033] Further, as shown in Figure 1As shown in the figure, in order to prevent the interference or collision of the lifting frame bottom with the limiting bracket, affect the reliability of lifting, and realize automatic control, the lifting frame 21 is provided with a connection platform 212 rotatably connected with the bridge end, the transmission mechanism 4 and the supporting beam 5 are arranged on the connection platform 212, the supporting beam 5 is in sliding fit with the sliding groove of the connection platform 212, and the transmission mechanism 4 is in transmission connection with the supporting beam 5, when the lifting frame 21 needs to be adjusted, first, the bridge lifting transmission unit 3 is used to lift the lifting frame 21 by a small stroke, then the transmission mechanism 4 is driven to act, so that the supporting beam 5 is slid along the sliding groove of the connection platform 212 to the limit position and is located on the inner side of the limiting bracket 10 under the action of the transmission mechanism 4, thereby avoiding the interference between the lifting frame 21 and the limiting bracket 10 during lifting.

[0034] Further, in order to facilitate the displacement of the supporting beam on the lifting frame 21, the transmission mechanism 4 is an electric motor or an air cylinder, when the transmission mechanism 4 is an electric motor, the transmission shaft of the electric motor is in transmission connection with the supporting beam 5 through a linear guide rail, and when the transmission mechanism 4 is an air cylinder, the top rod of the air cylinder is connected with the supporting beam 5.

[0035] Further, as shown in the figure, Figure 1 In order to further improve the rationality of the structure, and ensure that the lifting frame is stably supported on the limiting bracket and is in the same plane, and does not appear high and low, the lifting tower 1 comprises a tower platform 11 and four tower columns 12 fixedly connected with the ground foundation, the tower platform 11 is fixedly connected with the four tower columns 12, the electric winch 31 and the first pulley block 33 are arranged on the tower platform 11 of the lifting tower 1, the four tower columns 12 enclose a lifting channel for lifting the lifting frame 21, and a plurality of limiting brackets 10 are arranged on the inner side wall of each tower column 12 and in the height direction, and the four limiting brackets 10 at the same height are in the same plane.

[0036] Further, as shown in the figure, Figure 2 In order to realize the rotary connection of the bridge lifting frame, the lifting frame 21 is provided with a hinge support rotatably connected with the bridge end through a hinge, in the actual application scene, the bridge end is provided with a bridge hinge support, the lifting frame 21 is provided with a hinge support, and the bridge hinge support of the bridge end is rotatably connected with the hinge support of the lifting frame 21 through a hinge.

[0037] The working process of the utility model: taking the erection of two-stage bridge between the shore base and the pontoon as an example,

[0038] As shown in the figure, Figure 2As shown, the lifting tower 1 is established between the shore base and the pontoon limiting column, one end of the first-stage bridge 6 is connected with the first connecting mechanism 81 of the shore base side, the other end is rotationally connected with the connection platform 212 of the lifting frame 21 through a hinge, one end of the second-stage bridge 7 is connected with the second connecting mechanism 82 on the pontoon, the other end is also rotationally connected with the connection platform 212 of the lifting frame 21 through a hinge, and the erection of the whole bridge structure is completed.

[0039] According to the drop demand, the height of the bridge end rotationally connected with the lifting frame 21 is adjusted by the bridge lifting transmission unit 3, if the water level rises, the lifting frame 21 needs to be adjusted, the lifting frame 21 is lifted by a small stroke by the bridge lifting transmission unit 3 first, the support beam 5 is driven to slide to the limit position by the transmission mechanism 4, and is located on the inner side of the limiting corbel 10, so that the support beam 5 and the limiting corbel 10 are prevented from interfering,

[0040] Then, the electric winch 31 is driven to act, the traction rope 32 is wound, the lifting frame 21 is lifted in the lifting channel of the lifting tower, the support beam 5 is lifted to 20cm above the limiting corbel 10 of the corresponding height, the transmission mechanism 4 is driven again, the support beam 5 is adjusted to the supporting surface of the limiting corbel 10, the contact surface of the support beam 5 is completely placed on the limiting corbel 10, the traction rope is wound by the electric winch 31, the height is lowered, the support beam 5 is placed on the limiting corbel, the lifting frame 21 is supported on the limiting corbel, then the traction rope is unloaded, the power input is disconnected, and the bridge height adjustment is completed.

[0041] As shown in the drawings, Figure 2 As shown, the lifting tower 1 is provided with three-stage height adjustment, the first-stage bridge 6 and the second-stage bridge 7 are connected with the connection platform through hinges, and can freely roll on the connection platform after being connected with the connecting mechanisms on the shore base and the pontoon.

[0042] Therefore, after the special lifting equipment is used, the bridge can be ensured to be above the water surface,

[0043] In terms of safety, the steel structure bridge body can effectively ensure the use safety, avoid a series of processes such as frequent disassembly, assembly and climbing, and improve the use safety,

[0044] In terms of economy, the lifting frame similar to the bridge pier structure is moved backward, and the pontoon is used as a fulcrum, so that the construction difficulty and the engineering quantity are reduced, and the economy is improved.

[0045] Therefore, the special lifting equipment can erect at least two-stage truss bridge structure between the shore base and the pontoon, which solves the large-span problem of the pontoon and the shore base, and enables the bridge to adapt to large drop, compared with the single-span steel structure bridge, the cost is low, and the operation is very convenient, and at least two-stage span steel structure can adjust the height requirement according to the drop requirement.

[0046] The above ideal embodiments according to the utility model are used as inspiration, and through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A special lifting device for a truss bridge, characterized in that: The bridge lifting device comprises a lifting tower (1), a bridge lifting unit (2) and a bridge lifting transmission unit (3), A plurality of groups of separate limiting brackets (10) are arranged on the lifting tower (1) and along the height direction thereof, and the lifting tower (1) has a lifting channel, The bridge lifting unit (2) comprises a lifting frame (21) rotationally connected with the end of the bridge, and the lifting frame (21) is located in the lifting channel of the lifting tower (1), The bridge lifting transmission unit (3) comprises an electric winch (31), a traction rope (32), a first pulley block (33) and a second pulley block (34), the electric winch (31) and the first pulley block (33) are arranged on the top of the lifting tower (1), the second pulley block (34) is arranged on the top of the lifting frame (21), one end of the traction rope (32) is fixedly connected with the winding disc of the electric winch (31), the other end is connected with the second pulley block (34), and the traction rope (32) is also in transmission connection with the first pulley block (33), The electric winch (31) is driven to act, so as to drive the traction rope (32) to be wound or unwound, and synchronously drive the lifting frame (21) to ascend or descend in the lifting channel, so that the lifting frame (21) is supported on the limiting bracket (10) at the corresponding height, and the lifting of the bridge is completed.

2. Specialized lifting equipment for truss bridges according to claim 1, characterized in that: The lifting frame (21) comprises a ridge beam (211), a connecting platform (212) and a plurality of lifting columns (213), the top and bottom of the plurality of lifting columns (213) are fixedly connected with the ridge beam (211) and the connecting platform (212) respectively, the second pulley block (34) is arranged on the ridge beam (211), and the connecting platform (212) is further provided with a supporting beam (5) for supporting the lifting frame (21) on the limiting bracket (10) as a whole, and the supporting beam (5) is in sliding connection with the connecting platform (212).

3. Specialized lifting equipment for truss bridges according to claim 2, characterized in that: The lifting frame (21) further comprises a reinforcing beam (214) for reinforcing the overall strength, and the two ends of the reinforcing beam (214) are fixedly connected with the corresponding lifting columns (213) respectively.

4. Specialized lifting equipment for truss bridges according to claim 1, characterized in that: The lifting frame (21) has a connecting platform (212) rotationally connected with the end of the bridge, the connecting platform (212) is provided with a transmission mechanism (4) and a supporting beam (5), the supporting beam (5) is in sliding connection with the sliding groove of the connecting platform (212), the transmission mechanism (4) is in transmission connection with the supporting beam (5), the transmission mechanism (4) is driven to act, so that the supporting beam (5) slides along the sliding groove of the connecting platform (212) to the limit position and is located on the inner side of the limiting bracket (10) under the action of the transmission mechanism (4), so as to avoid the interference between the lifting frame (21) and the limiting bracket (10) during the lifting process.

5. Specialized lifting equipment for truss bridges according to claim 4, characterized in that: The transmission mechanism (4) is an electric motor or an air cylinder, when the transmission mechanism (4) is the electric motor, the transmission shaft of the electric motor is in transmission connection with the supporting beam (5) through the linear guide rail, and when the transmission mechanism (4) is the air cylinder, the top rod of the air cylinder is connected with the supporting beam (5).

6. Specialized lifting equipment for truss bridges according to claim 1, characterized by: The lifting tower (1) comprises a tower platform (11) and four tower columns (12) fixedly connected with the ground foundation, the tower platform (11) is fixedly connected with the four tower columns (12) at the same time, the electric winch (31) and the first pulley block (33) are arranged on the tower platform (11) of the lifting tower (1), the four tower columns (12) are surrounded to form a lifting channel for lifting the lifting frame (21), and a plurality of separate limiting corbels (10) are arranged on the inner side wall of each tower column (12) and in the height direction, and the four limiting corbels (10) at the same height are in the same plane.

7. The special hoisting equipment for truss bridges according to claim 1, characterized in that: The lifting frame (21) is provided with a hinged support connected with the end of the bridge through a hinge.

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