Three-action integrated electro-hydraulic control system of bridge detection vehicle

Abstract

The utility model discloses a three-action integrated electro-hydraulic control system of a bridge detection vehicle. Comprising a main power switch, a controller, an electric control handle, a walking forward control coil DT1, a walking backward control coil DT2, a vertical truss ascending control coil DT3, a vertical truss descending control coil DT4, a working platform folding control coil DT5, a working platform unfolding control coil DT6, an action change-over switch, a platform multi-way valve, a walking balance valve and a walking motor. The vertical truss oil cylinder balance valve is vertical to the truss oil cylinder, the platform oil cylinder balance valve and the platform oil cylinder. A platform multi-way valve, vertical truss lifting, working platform closing and opening and vehicle advancing and retreating are changed into electric control and manual operation, and the operation habit of construction under a bridge of a user is not changed. An electric control handle is additionally arranged for bridge construction operation, the three actions are controlled through the electric control handle, the requirement of a user for bridge construction operation is met, a hydraulic loop is simplified, and fault points are reduced.

Description

Technical Field

[0001] The utility model relates to a three-action integrated electro-hydraulic control system for an engineering machinery bridge inspection vehicle, in particular to a control system for a bridge inspection vehicle with an action-integrated simplified hydraulic circuit, belonging to the technical field of electro-hydraulic control of engineering machinery. Background Art

[0002] When the bridge inspection vehicle is performing exhibition operations, the vertical truss lifting and lowering operations, the closing and opening of the working platform need to be completed on the bridge, and the vehicle forward and backward operations also need to be completed on the bridge during inspection conditions. Traditional vehicles are bridge inspection vehicles. The trunk multi-way valve adds three working links: vertical truss lifting, working platform closing and opening, and vehicle forward and backward. The oil circuit is relatively complex and increases the number of failure points. Utility Model Content

[0003] The purpose of the utility model is to provide a three-action integrated electro-hydraulic control system for a bridge inspection vehicle in order to address the deficiencies in the above-mentioned prior art. The utility model changes the platform multi-way valve, vertical truss lifting, working platform closing and opening, and vehicle forward and backward movement into electric control plus manual operation, without changing the user's construction operation habits under the bridge. An electric control handle is added to the construction operation on the bridge, and the three actions of vertical truss lifting, working platform closing and opening, and vehicle forward and backward movement are controlled by the electric control handle, which is convenient for users to operate on the construction bridge and simplifies the hydraulic circuit to reduce failure points.

[0004] The purpose of this utility model can be achieved through the following technical measures:

[0005] The utility model discloses a three-action integrated electro-hydraulic control system for a bridge inspection vehicle, comprising a main power switch, a controller, an electric control handle, a walking forward control coil DT1, a walking backward control coil DT2, a vertical truss raising control coil DT3, a vertical truss lowering control coil DT4, a working platform closing control coil DT5, a working platform unfolding control coil DT6, an action switching switch, and a platform multi-way valve, a walking balance valve (12), a walking motor, a vertical truss cylinder balance valve, a vertical truss cylinder, a platform cylinder balance valve, and a platform cylinder; the main power switch is connected to the controller, the electric control handle is connected to the controller, the controller is connected to the walking forward control coil DT1, the walking backward control coil DT2, the vertical truss raising control coil DT3, the vertical truss lowering control coil DT4, the working platform closing control coil DT5, and the working platform unfolding control coil DT6, the action switching switch is connected to the main power switch and the controller; the first link of the platform multi-way valve is connected to the walking balance valve, and the second link of the platform multi-way valve is connected to the walking balance valve. It is connected to the vertical truss cylinder balance valve, and the third unit of the platform multi-way valve is connected to the platform cylinder balance valve; the walking balance valve is connected to the walking motor; the vertical truss cylinder balance valve is connected to the vertical truss cylinder; the platform cylinder balance valve is connected to the platform cylinder; the electric control interface of the first unit of the platform multi-way valve is connected to the walking forward control coil DT1 and the walking backward control coil DT2 in an electrically connected manner, and controls the vehicle to move forward and backward; the electric control interface of the second unit of the platform multi-way valve is connected to the vertical truss lifting control coil DT3 and the vertical truss lowering control coil DT4 in an electrically connected manner, and controls the vertical truss to rise and fall; the electric control interface of the third unit of the platform multi-way valve is connected to the working platform closing control coil DT5 and the working platform unfolding control coil DT6 in an electrically connected manner, and controls the closing and unfolding of the working platform.

[0006] To be more specific: when the forward travel control coil DT1 of the first unit of the platform multi-way valve is energized, the A1 port of the first unit outputs pressure oil, and the action is for the vehicle to move forward; when the backward travel control coil DT2 is energized, the B1 port of the first unit outputs pressure oil, and the action is for the vehicle to move backward; when the vertical truss raising control coil DT3 of the second unit of the platform multi-way valve is energized, the B2 port of the second unit outputs pressure oil, and the action is for the vehicle to raise the vertical truss; when the vertical truss lowering control coil DT4 is energized, the A2 port of the second unit outputs pressure oil, and the action is for the vehicle to lower the vertical truss; when the working platform closing control coil DT5 of the third unit of the platform multi-way valve is energized, the A3 port of the third unit outputs pressure oil, and the action is for the vehicle to close the working platform; the working platform expansion control coil DT6 is energized, and the B3 port of the third unit outputs pressure oil, and the action is for the working platform to expand.

[0007] The A1 port of the first joint of the platform multi-way valve described in the utility model is connected to the V1 port of the walking balance valve, and the B1 port of the first joint is connected to the V2 port of the walking balance valve; the A2 port of the second joint of the platform multi-way valve is connected to the V1 port of the vertical truss oil cylinder balance valve, and the B2 port of the second joint of the platform multi-way valve is connected to the V2 port of the vertical truss oil cylinder balance valve; the A3 port of the third joint of the platform multi-way valve is connected to the V1 port of the platform oil cylinder balance valve, and the B3 port of the third joint of the platform multi-way valve is connected to the V2 port of the platform oil cylinder balance valve; the C1 port of the walking balance valve is connected to the A port of the walking motor, and the C2 port of the walking balance valve is connected to the B port of the walking motor; the C1 port of the vertical truss oil cylinder balance valve is connected to the large cavity of the vertical truss oil cylinder, and the C2 port of the vertical truss oil cylinder balance valve is connected to the small cavity of the vertical truss oil cylinder; the C1 port of the platform oil cylinder balance valve is connected to the large cavity of the platform oil cylinder, and the C2 port of the platform oil cylinder balance valve is connected to the small cavity of the platform oil cylinder.

[0008] The working principle of the utility model is as follows:

[0009] The electric control handle performs integrated control of the platform multi-way valve, forward travel control coil DT1, backward travel control coil DT2, vertical truss raising control coil DT3, vertical truss lowering control coil DT4, working platform closing control coil DT5, and working platform unfolding control coil DT6 through the action switching switch and the controller.

[0010] When the action switch is switched to the forward and backward travel control position, the forward push and backward pull of the electric control handle controls the forward travel control coil DT1 and the backward travel control coil DT2 to control the vehicle forward and backward. When the action switch is switched to the vertical lifting control position, the forward push and backward pull of the electric control handle controls the vertical truss lifting control coil DT3 and the vertical truss lowering control coil DT4 to control the vertical truss lifting and lowering. When the action switch is switched to the platform retraction and extension control position, the forward push and backward pull of the electric control handle controls the working platform closing control coil DT5 and the working platform unfolding control coil DT6 to control the working platform closing and unfolding.

[0011] The beneficial effects of the utility model are as follows:

[0012] The utility model changes the platform multi-way valve, vertical truss lifting, working platform closing and opening, and vehicle forward and backward into electric control plus manual operation, without changing the user's construction operation habits under the bridge. The construction operation on the bridge adds an electric control handle, which is used to complete the control of these three actions, which is convenient for the user's construction bridge operation needs and simplifies the hydraulic circuit to reduce the failure points. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an electrical control schematic diagram of the utility model.

[0014] Figure 2 It is a hydraulic control principle diagram of the utility model.

[0015] Serial numbers in the figure: 1. Main power switch, 2. Controller, 3. Electric control handle, 4. Forward travel control coil DT1, 5. Reverse travel control coil DT2, 6. Vertical truss raising control coil DT3, 7. Vertical truss lowering control coil DT4, 8. Working platform closing control coil DT5, 9. Working platform unfolding control coil DT6, 10. Action switching switch, 10-1. Forward and backward travel control position, 10-2. Vertical lifting control position, 10-3. Platform retraction and extension control position, 11. Platform multi-way valve, 12. Travel balance valve, 13. Travel motor, 14. Vertical truss cylinder balance valve, 15. Vertical truss cylinder, 16. Platform cylinder balance valve, 17. Platform cylinder. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with embodiments (attached drawings).

[0017] like Figure 1 , 2As shown, the three-action integrated electro-hydraulic control system of the bridge inspection vehicle of the utility model includes a main power switch 1, a controller 2, an electric control handle 3, a walking forward control coil DT1 4, a walking backward control coil DT2 5, a vertical truss raising control coil DT3 6, a vertical truss lowering control coil DT4 7, a working platform closing control coil DT5 8, a working platform unfolding control coil DT6 9, an action switching switch 10, and a platform multi-way valve 11, a walking balance valve 12, a walking motor 13, a vertical truss cylinder balance valve 14, a vertical truss cylinder 15, a platform cylinder balance valve 16, and a platform cylinder 17; the main power switch 1 is connected to the controller 2, the electric control handle 3 is connected to the controller 2, and the controller 2 is connected to the walking forward control coil DT1 4, the walking backward control coil DT2 5, the vertical truss raising control coil DT3 6, the vertical truss lowering control coil DT4 7, the working platform closing control coil DT5 8, and the working platform unfolding control coil DT6 9 is connected, the action switching switch 10 is connected to the main power switch 1 and the controller 2; the first link of the platform multi-way valve 11 is connected to the walking balance valve 12, the second link of the platform multi-way valve 11 is connected to the vertical truss cylinder balance valve 14, and the third link of the platform multi-way valve 11 is connected to the platform cylinder balance valve 16; the walking balance valve 12 is connected to the walking motor 13; the vertical truss cylinder balance valve 14 is connected to the vertical truss cylinder 15; the platform cylinder balance valve 16 is connected to the platform cylinder 17; the electric control interface of the first link of the platform multi-way valve 11 is connected to the walking forward control coil DT1 4 and the walking backward control coil DT2 5 in an electrically connected manner, and controls the vehicle to move forward and backward; the electric control interface of the second link of the platform multi-way valve is connected to the vertical truss lifting control coil DT3 6 and the vertical truss lowering control coil DT4 7 in an electrically connected manner, and controls the vertical truss to rise and fall; the electric control interface of the third link of the platform multi-way valve 11 is connected to the working platform closing control coil DT5 in an electrically connected manner 8. The working platform expansion control coil DT6 9 is connected to control the folding and expansion of the working platform.

[0018] More specifically: when the forward travel control coil DT1 4 of the first link of the platform multi-way valve 11 is energized, the A1 port of the first link outputs pressure oil, and the action is for the vehicle to move forward; the backward travel control coil DT2 5 is energized, and the B1 port of the first link outputs pressure oil, and the action is for the vehicle to move backward; when the vertical truss raising control coil DT3 6 of the second link of the platform multi-way valve 11 is energized, the B2 port of the second link outputs pressure oil, and the action is for the vehicle to raise the vertical truss; the vertical truss lowering control coil DT4 7 is energized, and the A2 port of the second link outputs pressure oil, and the action is for the vehicle to lower the vertical truss; when the working platform closing control coil DT5 8 of the third link of the platform multi-way valve 11 is energized, the A3 port of the third link outputs pressure oil, and the action is for the vehicle working platform to close; the working platform unfolding control coil DT6 (9) is energized, and the B3 port of the third link outputs pressure oil, and the action is for the working platform to unfold.

[0019] The first A1 port of the platform multi-way valve 11 described in the utility model is connected to the V1 port of the walking balance valve 12, and the first B1 port is connected to the V2 port of the walking balance valve 12; the second A2 port of the platform multi-way valve 11 is connected to the V1 port of the vertical truss cylinder balance valve 14, and the second B2 port of the platform multi-way valve 11 is connected to the V2 port of the vertical truss cylinder balance valve 14; the third A3 port of the platform multi-way valve 11 is connected to the V1 port of the platform cylinder balance valve 16, and the third B3 port of the platform multi-way valve is connected to the platform cylinder balance valve 16. The V2 port of the balance valve 16 is connected; the C1 port of the travel balance valve 12 is connected to the A port of the travel motor 13, and the C2 port of the travel balance valve 12 is connected to the B port of the travel motor 13; the C1 port of the vertical truss cylinder balance valve 14 is connected to the large cavity of the vertical truss cylinder 15, and the C2 port of the vertical truss cylinder balance valve 14 is connected to the small cavity of the vertical truss cylinder 15; the C1 port of the platform cylinder balance valve 16 is connected to the large cavity of the platform cylinder 17, and the C2 port of the platform cylinder balance valve 16 is connected to the small cavity of the platform cylinder 17.

[0020] The first port A1 of the platform multi-way valve 11 described in the utility model is the oil port for forward travel, and the first port B1 is the oil port for backward travel; the second port A2 of the platform multi-way valve 11 is the oil port for lowering the vertical truss, and the second port B2 is the oil port for raising the vertical truss; the third port A3 of the platform multi-way valve 11 is the oil port for closing the platform, and the third port B3 is the oil port for unfolding the platform; the V1\V2 ports of the travel balance valve 12 are the oil inlet ports of the balance valve, and the C1\C2 ports are the oil outlet ports of the balance valve; the travel motor 13 The oil inlet from port A controls the forward movement, and the oil inlet from port B controls the backward movement; the V1\V2 ports of the vertical truss cylinder balance valve 14 are the balance valve oil inlets, and the C1\C2 ports are the balance valve oil outlets; the large-cavity oil inlet from the vertical truss cylinder 15 controls the vertical truss lowering, and the small-cavity oil inlet controls the vertical truss raising; the V1\V2 ports of the platform cylinder balance valve 16 are the balance valve oil inlets, and the C1\C2 ports are the balance valve oil outlets; the large-cavity oil inlet from the platform cylinder 17 controls the platform closing, and the small-cavity oil inlet controls the platform unfolding.

[0021] The working principle of the utility model is as follows:

[0022] The electric control handle 3 performs integrated control on the platform multi-way valve 11, the forward travel control coil DT1 4, the backward travel control coil DT2 5, the vertical truss raising control coil DT3 6, the vertical truss lowering control coil DT47, the working platform closing control coil DT5 8, and the working platform unfolding control coil DT6 9 through the action switching switch 10 and the controller 2.

[0023] When the action switching switch 10 is switched to the forward and backward travel control position 10-1, the forward push and backward pull of the electric control handle 3 controls the forward travel control coil DT1 4 and the backward travel control coil DT2 5 to control the vehicle forward and backward; when the action switching switch 10 is switched to the vertical lifting control position 10-2, the forward push and backward pull of the electric control handle 3 controls the vertical truss lifting control coil DT3 6 and the vertical truss lowering control coil DT4 7 to control the vertical truss lifting and lowering. When the action switching switch 10 is switched to the platform retracting and releasing control position 10-3, the forward push and backward pull of the electric control handle 3 controls the working platform closing control coil DT58 and the working platform unfolding control coil DT6 9 to control the working platform closing and unfolding.

Claims

1. A three-action integrated electro-hydraulic control system for a bridge inspection vehicle, comprising a main power switch (1), a controller (2), an electric control handle (3), a travel forward control coil DT1 (4), a travel backward control coil DT2 (5), a vertical truss raising control coil DT3 (6), a vertical truss lowering control coil DT4 (7), a working platform closing control coil DT5 (8), a working platform unfolding control coil DT6 (9), an action switching switch (10), and a platform multi-way valve (11), a travel balancing valve (12), a travel motor (13), a vertical truss cylinder balancing valve (14), a vertical truss cylinder (15), a platform cylinder balancing valve (16), and a platform cylinder (17), characterized in that: The main power switch (1) is connected to the controller (2), the electric control handle (3) is connected to the controller (2), the controller (2) is connected to the travel forward control coil DT1 (4), the travel backward control coil DT2 (5), the vertical truss raising control coil DT3 (6), the vertical truss lowering control coil DT4 (7), the working platform closing control coil DT5 (8), and the working platform unfolding control coil DT6 (9), the action switching switch (10) is connected to the main power switch (1) and the controller (2); the first connection of the platform multi-way valve (11) is connected to the travel balance valve (12), the second connection of the platform multi-way valve (11) is connected to the vertical truss cylinder balance valve (14), and the third connection of the platform multi-way valve (11) is connected to the platform cylinder balance valve (16); the travel balance valve (12) is connected to the travel motor (13) connected; the vertical truss cylinder balance valve (14) is connected to the vertical truss cylinder (15); the platform cylinder balance valve (16) is connected to the platform cylinder (17); the electric control interface of the first link of the platform multi-way valve (11) is connected to the travel forward control coil DT1 (4) and the travel backward control coil DT2 (5) in an electrically connected manner, and controls the vehicle to move forward and backward; the electric control interface of the second link of the platform multi-way valve (11) is connected to the vertical truss raising control coil DT3 (6) and the vertical truss lowering control coil DT4 (7) in an electrically connected manner, and controls the vertical truss to rise and fall; the electric control interface of the third link of the platform multi-way valve (11) is connected to the working platform closing control coil DT5 (8) and the working platform unfolding control coil DT6 (9) in an electrically connected manner, and controls the working platform to close and unfold.

2. The three-action integrated electro-hydraulic control system for a bridge inspection vehicle according to claim 1 is characterized in that: The A1 port of the first connection of the platform multi-way valve (11) is connected to the V1 port of the travel balance valve (12), and the B1 port of the first connection is connected to the V2 port of the travel balance valve (12); the A2 port of the second connection of the platform multi-way valve (11) is connected to the V1 port of the vertical truss cylinder balance valve (14), and the B2 port of the second connection of the platform multi-way valve (11) is connected to the V2 port of the vertical truss cylinder balance valve (14); the A3 port of the third connection of the platform multi-way valve (11) is connected to the V1 port of the platform cylinder balance valve (16), and the B3 port of the third connection of the platform multi-way valve (11) is connected to the platform cylinder balance valve (16). The balancing valve (16) V2 port is connected; the travel balancing valve (12) C1 port is connected to the travel motor (13) A port, and the travel balancing valve (12) C2 port is connected to the travel motor (13) B port; the vertical truss cylinder balancing valve (14) C1 port is connected to the vertical truss cylinder (15) large cavity, and the vertical truss cylinder balancing valve (14) C2 port is connected to the vertical truss cylinder (15) small cavity; the platform cylinder balancing valve (16) C1 is connected to the platform cylinder (17) large cavity, and the platform cylinder balancing valve (16) C2 is connected to the platform cylinder (17) small cavity.

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