Synchronous steering operation system for parallel operation girder transporting vehicle

Abstract

Two steering oil cylinder pipelines on the same group of steering axles are in differential connection, according to pipeline connection, steering oil cylinder oil ways of the two groups of axles are dead zones, dead zone pipelines are provided with deflation valves, the deflation valves are opened in the oil filling stage, gas in the dead zone pipelines is exhausted, and the two steering oil cylinder pipelines are communicated with the deflation valves. A manual ball valve is arranged on a dead zone pipeline, the manual valve is opened in the oil filling stage, the manual ball valve is closed after oil filling is finished, according to the fluid incompressibility principle, the flow and pressure of pressure oil of oil cylinders at the two ends are the same all the time, and working oil ports in a pump station are connected with corresponding working oil ports of steering oil cylinders on two sets of axles respectively. The steering oil cylinders of the two groups of axles can synchronously turn left and right, so that the steering angle and the steering speed of the beam transporting vehicle are consistent, and the safety of the beam transporting vehicle in the running process is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge erection machines, in particular to a synchronous steering operation system for a parallel beam transport vehicle. Background Art

[0002] With the development of bridge construction technology, some large-span and large-tonnage bridges adopt prefabricated erection construction methods. For the transportation of super-large prefabricated box girders on the bridge, they all face the problem of excessive bridge deck construction load that cannot meet the requirements. Bridge design requires that transport vehicles be able to distribute the load over a larger area as much as possible to ensure that the transport vehicle load can meet the bridge deck bearing requirements. At present, the construction and transportation of domestic high-speed railway bridges mainly use whole-machine box girders. However, for some super-large box girders with double-span bridge decks such as cross-sea bridges, if a single-span bridge deck layout and whole-machine box girder transportation scheme is adopted, the beam transport vehicle load will inevitably be very large, the bridge deck layout is limited, and the construction load cannot meet the requirements.

[0003] In order to solve this problem, some engineering and technical personnel proposed to arrange beam transport vehicles on the double-span bridge deck. According to the characteristics of box girder transportation, two vehicles are used in parallel, and the parallel beam transport vehicle uses two single beam transport vehicles to run in parallel. Since two single beam transport vehicles are connected in parallel, the steering angles of the tires on both sides must be synchronized, otherwise strong structural stress will be generated during the operation of the beam transport vehicle, causing damage to the structural parts. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a synchronous steering operation system for parallel beam transport vehicles, which can make the steering angles of the parallel beam transport vehicles synchronized.

[0005] In order to solve the above technical problems, the technical solution adopted by the present utility model is:

[0006] A synchronous steering operation system for parallel beam transport vehicles, comprising a first beam transport vehicle and a second beam transport vehicle running in parallel on the left and right sides, wherein a first steering oil cylinder connected to the left wheel and a second steering oil cylinder connected to the right wheel are provided on the steering axle of the first beam transport vehicle, and a third steering oil cylinder connected to the left wheel and a fourth steering oil cylinder connected to the right wheel are provided on the steering axle of the second beam transport vehicle, characterized in that:

[0007] The first steering cylinder, the second steering cylinder, the third steering cylinder and the fourth steering cylinder have the same specifications;

[0008] The rod cavity of the first steering cylinder is communicated with the rod cavity of the second steering cylinder, and the rodless cavity of the first steering cylinder is communicated with the rodless cavity of the second steering cylinder;

[0009] The rod cavity of the third steering cylinder is communicated with the rod cavity of the fourth steering cylinder, and the rodless cavity of the third steering cylinder is communicated with the rodless cavity of the fourth steering cylinder;

[0010] The first steering cylinder, the second steering cylinder, the third steering cylinder and the fourth steering cylinder are connected to the same pump station via a pipeline assembly;

[0011] The pipeline assembly includes a first steel pipe, the first steel pipe has a three-way interface, the first interface of the first steel pipe is connected to the first working oil port of the pump station, the second interface of the first steel pipe is connected to the rodless cavity of the fourth steering cylinder, the third interface of the first steel pipe is provided with a switch valve, and the second steel pipe is connected to the rear of the switch valve, the second steel pipe has a four-way interface, the first interface of the second steel pipe is connected to the rod cavity of the third steering cylinder, the second interface of the second steel pipe is provided with an air release valve, and the third interface of the second steel pipe is connected to the rodless cavity of the second steering cylinder;

[0012] The second working oil port of the pump station is communicated with the rod chamber of the first steering cylinder.

[0013] A further technical solution is that the first interface of the first steel pipe is arranged opposite to the second interface of the first steel pipe.

[0014] A further technical solution is that the first interface of the second steel pipe and the second interface of the second steel pipe are arranged opposite to each other.

[0015] A further technical solution is that the fourth interface of the second steel pipe is connected to the third interface of the first steel pipe, and the fourth interface of the second steel pipe is arranged opposite to the third interface of the second steel pipe.

[0016] The beneficial effects of adopting the above technical solution are:

[0017] In this synchronous steering operation system, the two steering cylinder pipelines on the same group of bridges are differentially connected. According to the pipeline connection, the steering cylinder oil circuits of the two groups of axles are dead zones. The dead zone pipelines are provided with air bleed valves. During the oil filling stage, the air bleed valves are opened to release the gas in the dead zone pipelines to ensure that the pipelines are filled with hydraulic oil. The dead zone pipelines are provided with manual ball valves. During the oil filling stage, the manual valves are opened and the manual ball valves are closed after the oil filling is completed. According to the principle of fluid incompressibility, the pressure oil flow and pressure of the cylinders at both ends are always the same. The working oil ports on the pump station are respectively connected to the corresponding working oil ports of the steering cylinders on the two groups of axles to ensure that the steering cylinders of the two groups of axles can turn left and right synchronously, so that the steering angles and steering speeds of the beam transport vehicles are consistent, thereby ensuring the safety of the beam transport vehicles during operation.

[0018] In addition, compared with other types of steering synchronization devices, this synchronous steering operating mechanism has a simple structure, does not require complex high-precision hydraulic components, is easy to repair and maintain, and reduces production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 It is a schematic diagram of the principle structure of the present utility model. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] like Figure 1 The figure shows a synchronized steering system for parallel beam transport vehicles, comprising a first beam transport vehicle and a second beam transport vehicle running parallel to each other. The steering axle of the first beam transport vehicle is equipped with a first steering cylinder 1 connected to the left wheel and a second steering cylinder 2 connected to the right wheel. The steering axle of the second beam transport vehicle is equipped with a third steering cylinder 3 connected to the left wheel and a fourth steering cylinder 4 connected to the right wheel. The mounting structure of the steering cylinders on the steering axle is conventional and will not be described in detail here. By controlling the oil ports of the four steering cylinders, the steering cylinders of the two sets of axles can achieve synchronized left and right steering.

[0024] The first steering cylinder 1 , the second steering cylinder 2 , the third steering cylinder 3 and the fourth steering cylinder 4 have the same specifications, that is, the cylinders have the same dimensions such as capacity.

[0025] The rod cavity of the first steering cylinder 1 is connected to the rod cavity of the second steering cylinder 2, and the rodless cavity of the first steering cylinder 1 is connected to the rodless cavity of the second steering cylinder 2. The rod cavity of the third steering cylinder 3 is connected to the rod cavity of the fourth steering cylinder 4, and the rodless cavity of the third steering cylinder 3 is connected to the rodless cavity of the fourth steering cylinder 4.

[0026] The first steering cylinder 1, second steering cylinder 2, third steering cylinder 3, and fourth steering cylinder 4 are connected to a single pump station 7 via a piping assembly. Pump station 7 has two operating oil ports, a first operating oil port 71 and a second operating oil port 72, forming a circulating oil circuit with the steering cylinders. When the vehicle is turning left, first operating oil port 71 serves as an oil outlet, while second operating oil port 72 serves as an oil return port. When the vehicle is turning right, first operating oil port 71 serves as an oil return port, while second operating oil port 72 serves as an oil outlet.

[0027] The pipeline assembly includes a first steel pipe 5 and a second steel pipe 6. The first steel pipe 5 has a three-way connection. The first connection of the first steel pipe 5 is connected to the first working oil port 71 of the pump station 7. The second connection of the first steel pipe 5 is connected to the rodless cavity of the fourth steering cylinder 4. The third connection of the first steel pipe 5 is equipped with an on-off valve 51. The second steel pipe 6 is connected to the rear of the on-off valve 51. The second steel pipe 6 has a four-way connection. The first connection of the second steel pipe 6 is connected to the rod cavity of the third steering cylinder 3. The second connection of the second steel pipe 6 is equipped with an air release valve. The third connection of the second steel pipe 6 is connected to the rodless cavity of the second steering cylinder 2. The second working oil port 72 of the pump station 7 is connected to the rod cavity of the first steering cylinder 1.

[0028] The first interface of the first steel pipe 5 is arranged opposite to the second interface of the first steel pipe 5. The first interface of the second steel pipe 6 is arranged opposite to the second interface of the second steel pipe 6. The fourth interface of the second steel pipe 6 is connected to the third interface of the first steel pipe 5, and the fourth interface of the second steel pipe 6 is arranged opposite to the third interface of the second steel pipe 6.

[0029] In this synchronous steering operation system, the two steering cylinder pipelines on the same group of bridges are differentially connected. According to the pipeline connection, the steering cylinder oil circuits of the two groups of axles are dead zones. The dead zone pipelines are provided with air bleed valves. During the oil filling stage, the air bleed valves are opened to release the gas in the dead zone pipelines to ensure that the pipelines are filled with hydraulic oil. The dead zone pipelines are provided with manual ball valves. During the oil filling stage, the manual valves are opened and the manual ball valves are closed after the oil filling is completed. According to the principle of fluid incompressibility, the pressure oil flow and pressure of the cylinders at both ends are always the same. The working oil ports on the pump station 7 are respectively connected to the corresponding working oil ports of the steering cylinders on the two groups of axles to ensure that the steering cylinders of the two groups of axles can turn left and right synchronously, so that the steering angles and steering speeds of the beam transport vehicles are consistent, thereby ensuring the safety of the beam transport vehicles during operation.

[0030] In addition, compared with other types of steering synchronization devices, this synchronous steering operating mechanism has a simple structure, does not require complex high-precision hydraulic components, is easy to repair and maintain, and reduces production and maintenance costs.

[0031] The above are only preferred embodiments of the present invention. Any simple modification, deformation and equivalent replacement made by anyone to the present invention based on the content of the present invention shall fall within the protection scope of the present invention.

Claims

1. A synchronous steering operation system for a parallel beam transport vehicle, comprising a first beam transport vehicle and a second beam transport vehicle running in parallel on the left and right sides, wherein a first steering oil cylinder (1) connected to the left wheel and a second steering oil cylinder (2) connected to the right wheel are provided on the steering axle of the first beam transport vehicle, and a third steering oil cylinder (3) connected to the left wheel and a fourth steering oil cylinder (4) connected to the right wheel are provided on the steering axle of the second beam transport vehicle, characterized in that: The first steering cylinder (1), the second steering cylinder (2), the third steering cylinder (3) and the fourth steering cylinder (4) have the same specifications; The rod chamber of the first steering oil cylinder (1) is in communication with the rod chamber of the second steering oil cylinder (2), and the rodless chamber of the first steering oil cylinder (1) is in communication with the rodless chamber of the second steering oil cylinder (2); The rod chamber of the third steering oil cylinder (3) is in communication with the rod chamber of the fourth steering oil cylinder (4), and the rodless chamber of the third steering oil cylinder (3) is in communication with the rodless chamber of the fourth steering oil cylinder (4); The first steering cylinder (1), the second steering cylinder (2), the third steering cylinder (3) and the fourth steering cylinder (4) are connected to the same pump station (7) via a pipeline assembly; The pipeline assembly includes a first steel pipe (5), the first steel pipe (5) has a three-way interface, the first interface of the first steel pipe (5) is communicated with the first working oil port (71) of the pump station (7), the second interface of the first steel pipe (5) is communicated with the rodless cavity of the fourth steering oil cylinder (4), the third interface of the first steel pipe (5) is provided with a switch valve (51), and a second steel pipe (6) is connected to the rear of the switch valve (51), the second steel pipe (6) has a four-way interface, the first interface of the second steel pipe (6) is communicated with the rod cavity of the third steering oil cylinder (3), the second interface of the second steel pipe (6) is provided with an air release valve, and the third interface of the second steel pipe (6) is communicated with the rodless cavity of the second steering oil cylinder (2); The second working oil port (72) of the pump station (7) is communicated with the rod chamber of the first steering oil cylinder (1).

2. The synchronous steering operation system according to claim 1, characterized in that: The first interface of the first steel pipe (5) and the second interface of the first steel pipe (5) are arranged opposite to each other.

3. The synchronous steering operation system according to claim 1, characterized in that: The first interface of the second steel pipe (6) is arranged opposite to the second interface of the second steel pipe (6).

4. The synchronous steering operation system according to claim 1, characterized in that: The fourth interface of the second steel pipe (6) is connected to the third interface of the first steel pipe (5), and the fourth interface of the second steel pipe (6) is arranged opposite to the third interface of the second steel pipe (6).

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