Steering device of small silt remover and control method

Abstract

The invention discloses a steering device of a small silt remover and a control method, and belongs to the technical field of pipe network silt removing equipment. The steering device comprises a steering oil cylinder which comprises a first direction oil port L1 and a second direction oil port R1; the hydraulic oil supply assembly is used for providing hydraulic oil; the steering control valve group comprises an electro-hydraulic proportional directional valve, and the electro-hydraulic proportional directional valve is arranged between the hydraulic oil supply assembly and the steering oil cylinder; the control assembly comprises a steering handle and a controller, the input end of the controller is connected with the steering handle, the output end of the controller is connected with the electro-hydraulic proportional directional valve, and the controller is used for outputting control signals of the displacement amount of the valve element of the electro-hydraulic proportional directional valve and the displacement direction of the valve element of the electro-hydraulic proportional directional valve according to signals of the steering handle. Steering operation can be flexibly carried out.

Description

Technical Field

[0001] The invention relates to a steering device and a control method of a small-sized silt remover, belonging to the technical field of pipe network silt removal equipment. Background Art

[0002] Small dredging machines are suitable for small areas such as urban villages, back streets and alleys where large dredging equipment cannot enter.

[0003] In the prior art, the structure of a small silt remover includes four parts: a four-wheel chassis, a small crane arm and a slewing machine base, a liftable garbage bin assembly, and a hydraulic and electrical control system. The four-wheel chassis has the functions of walking, steering, braking, and power output. The front axle is driven for walking, and the rear axle is driven for steering. The steering device includes a steering axle, a steering drive shaft, a steering column, a steering bracket, and a foot pedal. During the use of the silt remover, the driver stands on the foot pedal, holds the steering bracket with his hands, and achieves steering by turning the steering bracket left and right. This type of steering mechanism is affected by the operating conditions of the entire vehicle, has a small steering angle, a short steering arm, and is difficult to drive and operate with low efficiency. In particular, it is more difficult to operate the steering bracket left and right in a narrow space. Even if a hydraulic cylinder boost steering or electric power steering is provided in the prior art, a large steering angle is still required, and steering is not easy to achieve. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a steering device and control method for a small silt remover, which can flexibly perform steering operations. To achieve the above purpose, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a steering device for a small silt remover, comprising: The steering cylinder comprises a first directional oil port L1 and a second directional oil port R1; A hydraulic oil supply assembly, used for supplying hydraulic oil; The steering control valve group includes an electro-hydraulic proportional reversing valve, which is arranged between the hydraulic oil supply assembly and the steering cylinder; A control component includes a steering handle and a controller, wherein the input end of the controller is connected to the steering handle, and the output end is connected to the electro-hydraulic proportional reversing valve. The controller is used to output a control signal of the displacement of the electro-hydraulic proportional reversing valve spool and the displacement direction of the electro-hydraulic proportional reversing valve spool according to a signal from the steering handle; the control signal of the displacement of the electro-hydraulic proportional reversing valve spool is used to control the steering cylinder to output different steering speeds, and the displacement direction control signal of the electro-hydraulic proportional reversing valve spool is used to control the hydraulic oil supply component to be connected to the first direction oil port L1 / the second direction oil port R1, so that the steering cylinder outputs different steering directions.

[0005] In combination with the first aspect, optionally, the hydraulic oil supply assembly includes: Hydraulic oil tank; A hydraulic pump, whose oil inlet is connected to the oil outlet of the hydraulic oil tank; An oil circuit control valve, whose oil inlet P0 is connected to the oil outlet of the hydraulic pump, whose first working oil port CF is connected to the oil inlet P1 of the steering control valve group, whose second working oil port EF is connected to the hydraulic oil tank, and whose control oil port LS0 is connected to the control oil port LS1 of the steering control valve group; The hydraulic oil output by the hydraulic pump is input into the oil circuit control valve, and is input into the steering control valve group after flow distribution by the oil circuit control valve under the control of the control oil port LS0. The excess flow of hydraulic oil flows back to the hydraulic oil tank through the second working oil port EF.

[0006] In combination with the first aspect, optionally, the hydraulic oil supply assembly further includes an electric motor for providing power, and the hydraulic pump and the control assembly are installed at the output end of the electric motor.

[0007] In combination with the first aspect, optionally, the steering control valve group is provided with an oil inlet P1, an oil return port T1, a first direction oil port L0, a second direction oil port R0 and a control oil port LS1; The oil inlet P1 is connected to the first working oil port CF of the oil circuit control valve in the hydraulic oil supply assembly, and the oil return port T1 is connected to the hydraulic oil tank of the hydraulic oil supply assembly; The first direction oil port L0 is connected to the first direction oil port L1 of the steering cylinder, and the second direction oil port R0 is connected to the second direction oil port R1 of the steering cylinder; The control oil port LS1 is connected to the control oil port LS1 of the oil circuit control valve in the hydraulic oil supply assembly; When the hydraulic oil is input into the steering cylinder from the first directional oil port L0, the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the second directional oil port R0 and flows back to the hydraulic oil tank through the return oil port T1; When the hydraulic oil is input into the steering cylinder from the second directional oil port R0 , the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the first directional oil port L0 , and flows back to the hydraulic oil tank through the oil return port T1 .

[0008] In combination with the first aspect, optionally, the electro-hydraulic proportional reversing valve is provided with an oil inlet P2, an oil return port T2, a working oil port A and a working oil port B, The oil inlet P2 is connected to the oil inlet P1 of the steering control valve, and the oil return port T2 is connected to the oil return port T1 of the steering control valve; The working oil port A is connected to the second direction oil port R0 of the steering control valve, and the working oil port B is connected to the first direction oil port L0 of the steering control valve; When the oil inlet P2 is connected to the working oil port A, and the oil return port T2 is connected to the working oil port B, the hydraulic oil is input into the steering cylinder from the second directional oil port R0, and the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the first directional oil port L0; When the oil inlet P2 is connected to the working oil port B and the oil return port T2 is connected to the working oil port A, the hydraulic oil is input into the steering cylinder from the first directional oil port L0, and the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the second directional oil port R0.

[0009] In combination with the first aspect, optionally, the steering control valve group includes a steering system safety valve, The steering system safety valve is arranged on the connecting oil line between the oil inlet P1 of the steering control valve and the oil inlet P2 of the electro-hydraulic proportional reversing valve, and is used to control the pressure of the hydraulic oil input into the electro-hydraulic proportional reversing valve not to exceed the set value, so that the flow of the electro-hydraulic proportional reversing valve is stable; The steering system safety valve is used to control the pressure of the hydraulic oil input to the steering cylinder to not exceed a set value in the connecting oil circuit between the working oil port A and the second direction oil port R0 of the steering control valve and the connecting oil circuit between the working oil port B and the first direction oil port L0 of the steering control valve; When the pressure of the hydraulic oil exceeds a set value, it flows back to the hydraulic oil tank of the hydraulic oil supply assembly through the oil return port T1 of the steering control valve.

[0010] In a second aspect, the present invention provides a control method for a steering device of a small silt remover according to the first aspect, comprising: Get the signal of the steering handle; According to the signal of the steering handle, the control signal of the displacement amount and displacement direction of the electro-hydraulic proportional reversing valve core is output; Among them, the control signal of the displacement amount of the electro-hydraulic proportional reversing valve core is used to control the steering cylinder to output different steering speeds, and the displacement direction control signal of the electro-hydraulic proportional reversing valve core is used to control the conduction between the hydraulic oil supply component and the first direction oil port L1 / the second direction oil port R1, so that the steering cylinder outputs different steering directions.

[0011] In combination with the second aspect, optionally, outputting a control signal of a displacement amount and a displacement direction of a valve core of an electro-hydraulic proportional reversing valve according to a signal of a steering handle comprises: According to the signal of the steering handle action direction, the displacement direction of the valve core of the electro-hydraulic proportional reversing valve is determined, and the control signal of the displacement direction of the valve core of the electro-hydraulic proportional reversing valve is output; According to the signal of the steering handle movement amplitude, the displacement of the electro-hydraulic proportional reversing valve core is determined, and the displacement of the electro-hydraulic proportional reversing valve core is output.

[0012] In combination with the second aspect, optionally, when the signal obtained from the steering handle is to turn left, a control signal for the leftward displacement of the valve core of the electro-hydraulic proportional reversing valve and a control signal for the leftward displacement amount are output according to the signal from the steering handle; The valve core of the electro-hydraulic proportional reversing valve produces a displacement to the left according to the control signal, the oil inlet P2 of the electro-hydraulic proportional reversing valve is connected with the working oil port B, and the oil return port T2 is connected with the working oil port A; The steering control valve group transmits the oil circuit pressure to the control oil port LS0 of the hydraulic oil supply component through the control oil port LS1. Under the control of the control oil port LS0, the oil circuit control valve 3 distributes the flow and inputs the hydraulic oil to the oil inlet P1; the hydraulic oil flows through the passage between the oil inlet P2 and the working oil port B, and is input from the first direction oil port L0 to the first direction oil port L1; the steering cylinder drives the steering axle and the tire assembly to deflect to the left, realizing left steering; The hydraulic oil flowing through the steering cylinder flows out from the second directional oil port R1, returns to the steering control valve group through the second directional oil port R0, flows through the passage between the working oil port A and the return oil port T2, and returns to the hydraulic oil tank through the return oil port T1.

[0013] In combination with the second aspect, optionally, when the signal obtained from the steering handle is to turn right, a control signal for the rightward displacement of the valve core of the electro-hydraulic proportional reversing valve and a control signal for the rightward displacement amount are output according to the signal from the steering handle; The valve core of the electro-hydraulic proportional reversing valve produces a displacement to the right according to the control signal, the oil inlet P2 of the electro-hydraulic proportional reversing valve is connected with the working oil port A, and the oil return port T2 is connected with the working oil port B; The steering control valve group transmits the oil circuit pressure to the control oil port LS0 of the hydraulic oil supply component through the control oil port LS1. Under the control of the control oil port LS0, the oil circuit control valve 3 distributes the flow and inputs the hydraulic oil to the oil inlet P1; the hydraulic oil flows through the passage between the oil inlet P2 and the working oil port A, and is input from the first direction oil port R0 to the first direction oil port R1; the steering cylinder drives the steering axle and the tire assembly to deflect to the right, realizing right steering; The hydraulic oil flowing through the steering cylinder flows out from the second directional oil port L1, returns to the steering control valve group through the second directional oil port L0, flows through the passage between the working oil port B and the return oil port T2, and returns to the hydraulic oil tank through the return oil port T1.

[0014] Compared with the prior art, the steering device and control method of a small silt remover provided by the embodiment of the present invention have the following beneficial effects: The control component of the present invention comprises a steering handle and a controller, wherein the input end of the controller is connected to the steering handle, and the output end is connected to the electro-hydraulic proportional reversing valve, and the controller is used to output a control signal of the displacement of the electro-hydraulic proportional reversing valve spool and the displacement direction of the electro-hydraulic proportional reversing valve spool according to the signal of the steering handle; the control signal of the displacement of the electro-hydraulic proportional reversing valve spool is used to control the steering cylinder to output different steering speeds, and the displacement direction control signal of the electro-hydraulic proportional reversing valve spool is used to control the hydraulic oil supply component to be connected with the first direction oil port L1 / the second direction oil port R1, so that the steering cylinder outputs different steering directions; the present invention can realize the corresponding steering direction and steering speed through the steering cylinder, without the need for the driver to pull the steering bracket left and right, and can flexibly perform steering operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the principle of a steering device of a small silt remover in Example 1 of the present invention; Figure 2 It is a schematic diagram of the whole assembly of a steering device of a small silt clearing machine in Example 1 of the present invention.

[0016] In the figure: 1. Hydraulic oil tank; 2. Hydraulic pump; 3. Oil circuit control valve; 4. Feedback oil circuit; 5. Steering control valve group; 6. Electro-hydraulic proportional reversing valve; 7. Steering cylinder; 8. Steering handle; 9. Controller; 10. Signal transmission circuit; 11. Steering axle and tire assembly; 12. Foot pedal; 13. Safety handrail. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example 1

[0018] like Figure 1 As shown, this embodiment provides a steering device for a small silt remover, including: a steering cylinder 77, a hydraulic oil supply component, a steering control valve group 5, a control component and a motor.

[0019] The steering cylinder 7 is a cylinder for performing the steering action of the silt remover.

[0020] The steering cylinder 7 includes a first directional oil port L1 and a second directional oil port R1.

[0021] In this embodiment, the steering cylinder 7 is a constant speed and constant stroke hydraulic cylinder.

[0022] The hydraulic oil supply component is used to provide hydraulic oil and output hydraulic oil of corresponding flow rate according to load information.

[0023] The steering control valve group 5 includes an electro-hydraulic proportional reversing valve 6, which is arranged between the hydraulic oil supply assembly and the steering cylinder 7. According to the instructions of the controller 9, the positions of the oil inlet and outlet are adjusted to adjust the steering direction. The steering control valve group 5 feeds back the load of the steering cylinder 7 to adjust the steering speed.

[0024] The control component includes a steering handle 8 and a controller 9. The input end of the controller 9 is connected to the steering handle 8, and the output end is connected to the electro-hydraulic proportional reversing valve 6. The controller 9 is used to output a control signal of the displacement amount and the displacement direction of the valve core of the electro-hydraulic proportional reversing valve 6 according to the signal of the steering handle 8.

[0025] The steering handle 8 is a device for controlling the steering and operation of the silt remover. In this embodiment, the steering handle 8 is an electric proportional steering handle 8, which adopts electric proportional technology and realizes the control of the steering of the silt remover by collecting the changes of electronic signals. The electric proportional handle includes an angle sensor and an operating handle. The angle sensor converts the signals of the movement direction and movement amplitude of the operating handle into electric signals and inputs them into the controller 9.

[0026] When the steering handle 8 is manipulated in the same direction, the steering information (movement amplitude) is input into the controller 9, and the controller 9 generates a control signal, and transmits the control signal of the controller 9 to the electro-hydraulic proportional reversing valve 6 through the signal transmission circuit 10. The electro-hydraulic proportional reversing valve 6 adjusts the position of the valve core according to the control signal of the controller 9, and the steering control valve group 5 controls the oil port LS1 to feedback the load of the steering cylinder 7 to the hydraulic oil supply assembly, and the oil circuit control valve 3 distributes the corresponding flow of hydraulic oil to the steering cylinder 7 through the steering control valve group 5, so as to realize the steering speed of the steering handle 8 at this angle. When the steering handle 8 is manipulated in the opposite direction, the steering information (movement direction and movement amplitude) is input into the controller 9 to realize the adjustment of the steering direction and steering speed.

[0027] Specifically, the control signal of the displacement amount of the valve core of the electro-hydraulic proportional reversing valve 6 is used to control the steering cylinder 7 to output different steering speeds. The control signal of the displacement direction of the valve core of the electro-hydraulic proportional reversing valve 6 is used to control the connection between the hydraulic oil supply component and different oil ports of the steering cylinder 7, so that the steering cylinder 7 outputs different steering directions.

[0028] like Figure 2 The figure shows a schematic diagram of the assembly of a steering device of a small silt remover. When in use, the driver stands on the foot pedal 12, and does not need to manually turn the mechanical mechanism. By turning the steering handle 8 at a certain angle, the steering device of the small silt remover can be turned at a corresponding speed. The greater the angle of pushing (or pulling) the handle, the faster the steering speed. The driver can operate the steering handle 8 as needed, which is convenient and efficient.

[0029] like Figure 2As shown, the present embodiment provides a safety handrail 13 to ensure the safety of the driver when standing on the foot pedal 12 and to prevent the driver from accidentally touching the steering handle 8.

[0030] The electric motor is used to provide power as a power source for the hydraulic system of the steering device. In this embodiment, the electric motor is a DC permanent magnet synchronous motor. like Figure 1 As shown, the hydraulic oil supply assembly includes: Hydraulic oil tank 1; A hydraulic pump 2, whose oil inlet is connected to the oil outlet of the hydraulic oil tank 1; The oil circuit control valve 3, its oil inlet P0 is connected to the oil outlet of the hydraulic pump 2, its first working oil port CF is connected to the oil inlet P1 of the steering control valve group 5, its second working oil port EF is connected to the hydraulic oil tank 1, and its control oil port LS0 is connected to the control oil port LS1 of the steering control valve group 5.

[0031] The hydraulic oil output by the hydraulic pump 2 is input to the oil circuit control valve 3, and is input to the steering control valve group 5 after flow distribution by the oil circuit control valve 3 under the control of the control oil port LS0. The excess flow of hydraulic oil flows back to the hydraulic oil tank 1 through the second working oil port EF.

[0032] In this embodiment, the hydraulic oil tank 1 can store hydraulic oil for the hydraulic system of the steering device of the silt clearing vehicle and dissipate heat for the hydraulic oil.

[0033] In this embodiment, the hydraulic pump 2 is installed at the output end of the motor.

[0034] In this embodiment, the hydraulic pump 2 is a gear pump, the oil inlet of the gear pump is connected to the oil outlet of the hydraulic oil tank 1 through a hydraulic hose, and the oil outlet of the gear pump is connected to the oil inlet P0 of the oil circuit control valve 3 through a hydraulic hose.

[0035] In this embodiment, the first working oil port CF is connected to the oil inlet P1 of the steering control valve group 5 through a hydraulic hose, the second working oil port EF is connected to the hydraulic oil tank 1 through a hydraulic hose, and the control oil port LS0 is connected to the control oil port LS1 of the steering control valve group 5 through a hydraulic hose.

[0036] It should be noted that the second working oil port EF is connected to the working device valve group through a hydraulic hose. When the working device valve group is not working, the hydraulic oil in the second working oil port EF is directly returned to the hydraulic oil tank 1.

[0037] like Figure 1 As shown, the steering control valve group 5 is provided with an oil inlet P1, an oil return port T1, a first direction oil port L0, a second direction oil port R0 and a control oil port LS1.

[0038] The oil inlet P1 is connected to the first working oil port CF of the oil circuit control valve 3 in the hydraulic oil supply assembly, and the oil return port T1 is connected to the hydraulic oil tank 1 of the hydraulic oil supply assembly. In this embodiment, the connection is made through a hydraulic hose.

[0039] The first directional oil port L0 is connected to the first directional oil port L1 of the steering oil cylinder 7, and the second directional oil port R0 is connected to the second directional oil port R1 of the steering oil cylinder 7. In this embodiment, the connection is made through a hydraulic hose.

[0040] The control oil port LS1 is connected to the control oil port LS1 of the oil circuit control valve 3 in the hydraulic oil supply assembly.

[0041] This embodiment provides two flow directions of hydraulic oil, corresponding to different steering directions. Flow direction one: when hydraulic oil is input into the steering cylinder 7 from the first direction oil port L0, the hydraulic oil flowing through the steering cylinder 7 returns to the steering control valve group 5 from the second direction oil port R0, and returns to the hydraulic oil tank 1 through the return oil port T1. Flow direction two: when hydraulic oil is input into the steering cylinder 7 from the second direction oil port R0, the hydraulic oil flowing through the steering cylinder 7 returns to the steering control valve group 5 from the first direction oil port L0, and returns to the hydraulic oil tank 1 through the return oil port T1.

[0042] The steering control valve group 5 includes an electro-hydraulic proportional reversing valve 6. The electro-hydraulic proportional reversing valve 6 is provided with an oil inlet P2, an oil return port T2, a working oil port A and a working oil port B.

[0043] The oil inlet P2 is connected to the oil inlet P1 of the steering control valve, and the oil return port T2 is connected to the oil return port T1 of the steering control valve.

[0044] The working oil port A is connected to the second direction oil port R0 of the steering control valve, and the working oil port B is connected to the first direction oil port L0 of the steering control valve.

[0045] A feedback oil circuit 44 is provided in the steering control valve group 5. One end of the feedback oil circuit 4 is provided on the connecting oil circuit between the working oil port A and the second direction oil port R0 of the steering control valve, and on the connecting oil circuit between the working oil port B and the first direction oil port L0 of the steering control valve, and the other end is connected to the control oil port LS1, and is used for the feedback oil circuit 4 pressure to adjust the hydraulic oil flow, control the steering cylinder 7 to output different steering speeds, and realize the adjustment of the steering speed.

[0046] This embodiment provides two flow directions of hydraulic oil, corresponding to different steering directions. Flow direction one: when the oil inlet P2 is connected to the working oil port A and the oil return port T2 is connected to the working oil port B, the hydraulic oil is input into the steering cylinder 7 from the second direction oil port R0, and the hydraulic oil flowing through the steering cylinder 7 returns to the steering control valve group 5 from the first direction oil port L0. Flow direction two: when the oil inlet P2 is connected to the working oil port B and the oil return port T2 is connected to the working oil port A, the hydraulic oil is input into the steering cylinder 7 from the first direction oil port L0, and the hydraulic oil flowing through the steering cylinder 7 returns to the steering control valve group 5 from the second direction oil port R0.

[0047] The steering control valve group 5 includes a steering system safety valve, which is used to control the pressure of the hydraulic oil so that it cannot exceed the set value to ensure steering safety. When the pressure of the hydraulic oil exceeds the set value, it flows back to the hydraulic oil tank 1 of the hydraulic oil supply assembly through the oil return port T1 of the steering control valve.

[0048] like Figure 1 As shown, the steering system safety valve is arranged on the connecting oil circuit between the oil inlet P1 of the steering control valve and the oil inlet P2 of the electro-hydraulic proportional reversing valve 6, and is used to control the pressure of the hydraulic oil input into the electro-hydraulic proportional reversing valve 6 not to exceed the set value, so as to stabilize the flow of the electro-hydraulic proportional reversing valve 6.

[0049] like Figure 1 As shown, the steering system safety valve is arranged on the connecting oil circuit of the second direction oil port R0 of the steering control valve of the working oil port A and the connecting oil circuit between the working oil port B and the first direction oil port L0 of the steering control valve, and is used to control the pressure of the hydraulic oil input into the steering cylinder 7 not to exceed the set value.

[0050] Preferably, the steering control valve group 5 includes a pressure compensation valve, which is arranged on the connecting oil circuit of the second direction oil port R0 of the steering control valve of the working oil port A and the connecting oil circuit between the working oil port B and the first direction oil port L0 of the steering control valve, and is used to increase the flow of the input steering control valve group 5 through the control oil port LS1 when the pressure of the hydraulic oil input to the steering cylinder 7 is insufficient.

[0051] This embodiment can achieve the corresponding steering direction and steering speed through the steering cylinder 7, without the need for the driver to move the steering bracket left and right, and can flexibly perform steering operations. Example 2

[0052] This embodiment provides a control method for a steering device of a small dredging machine based on the first embodiment.

[0053] Step 1: Get the signal of the steering handle 8.

[0054] Step 2: According to the signal of the steering handle 8, a control signal of the displacement amount and the displacement direction of the valve core of the electro-hydraulic proportional reversing valve 6 is output.

[0055] After receiving the signal from the steering handle 8, the controller 9 converts the electrical signal into a control signal through existing proportional calculation, and provides a signal transmission circuit 10 to output to the electromagnetic coil of the electro-hydraulic proportional reversing valve 6 to control the movement of the valve core.

[0056] Step 2.1: According to the signal of the action direction of the steering handle 8, the displacement direction of the valve core of the electro-hydraulic proportional reversing valve 6 is determined, and a control signal of the displacement direction of the valve core of the electro-hydraulic proportional reversing valve 6 is output.

[0057] Step 2.2: According to the signal of the movement amplitude of the steering handle 8, the displacement of the valve core of the electro-hydraulic proportional reversing valve 6 is determined, and the displacement of the valve core of the electro-hydraulic proportional reversing valve 6 is output.

[0058] It should be noted that there is no order between step 2.1 and step 2.2. They are only used to distinguish the difference in signal conversion and are usually performed simultaneously in actual applications.

[0059] Specifically, the control signal of the displacement amount of the valve core of the electro-hydraulic proportional reversing valve 6 is used to control the steering cylinder 7 to output different steering speeds, and the control signal of the displacement direction of the valve core of the electro-hydraulic proportional reversing valve 6 is used to control the conduction between the hydraulic oil supply component and the first direction oil port L1 / the second direction oil port R1, so that the steering cylinder 7 outputs different steering directions.

[0060] Example 1: When the signal obtained from the steering handle 8 is to turn left, a control signal for the leftward displacement of the valve core of the electro-hydraulic proportional reversing valve 6 and a control signal for the leftward displacement amount are output according to the signal from the steering handle 8.

[0061] The valve core of the electro-hydraulic proportional reversing valve 6 produces a leftward displacement according to the control signal, and the oil inlet P2 of the electro-hydraulic proportional reversing valve 6 is connected to the working oil port B, and the oil return port T2 is connected to the working oil port A.

[0062] The steering control valve group 5 transmits the oil circuit pressure to the control oil port LS0 of the hydraulic oil supply component through the control oil port LS1, and the hydraulic oil is input to the oil inlet P1 after the flow distribution by the oil circuit control valve 3; the hydraulic oil flows through the passage between the oil inlet P2 and the working oil port B, and is input to the first direction oil port L1 from the first direction oil port L0; the steering cylinder 7 drives the steering axle and tire assembly 11 to deflect to the left, realizing left steering.

[0063] The hydraulic oil flowing through the steering cylinder 7 flows out from the second directional oil port R1, returns to the steering control valve group 5 through the second directional oil port R0, flows through the passage between the working oil port A and the return oil port T2, and returns to the hydraulic oil tank 1 through the return oil port T1.

[0064] When the signal obtained from the steering handle 8 is to turn left, a control signal of the leftward displacement of the valve core of the electro-hydraulic proportional reversing valve 6 and a control signal of the leftward displacement amount are output according to the signal from the steering handle 8; The valve core of the electro-hydraulic proportional reversing valve 6 generates a displacement to the left according to the control signal, and the oil inlet P2 of the electro-hydraulic proportional reversing valve 6 is connected with the working oil port B, and the oil return port T2 is connected with the working oil port A; The steering control valve group 5 transmits the oil circuit pressure to the control oil port LS0 of the hydraulic oil supply assembly through the control oil port LS1, and the oil circuit control valve 3 distributes the flow and inputs the hydraulic oil to the oil inlet P1; the hydraulic oil flows through the passage between the oil inlet P2 and the working oil port B, and is input from the first direction oil port L0 to the first direction oil port L1; the steering cylinder 7 drives the steering axle and tire assembly 11 to deflect to the left, realizing left steering; The hydraulic oil flowing through the steering cylinder 7 flows out from the second directional oil port R1, returns to the steering control valve group 5 through the second directional oil port R0, flows through the passage between the working oil port A and the return oil port T2, and returns to the hydraulic oil tank 1 through the return oil port T1.

[0065] Example 2: When the signal obtained from the steering handle 8 is to turn right, a control signal for the rightward displacement of the valve core of the electro-hydraulic proportional reversing valve 6 and a control signal for the rightward displacement amount are output according to the signal from the steering handle 8.

[0066] The valve core of the electro-hydraulic proportional reversing valve 6 produces a rightward displacement according to the control signal, and the oil inlet P2 of the electro-hydraulic proportional reversing valve 6 is connected to the working oil port A, and the oil return port T2 is connected to the working oil port B.

[0067] The steering control valve group 5 transmits the oil circuit pressure to the control oil port LS0 of the hydraulic oil supply component through the control oil port LS1, and the hydraulic oil is input to the oil inlet P1 after the flow distribution by the oil circuit control valve 3; the hydraulic oil flows through the passage between the oil inlet P2 and the working oil port A, and is input to the first direction oil port R1 from the first direction oil port R0; the steering cylinder 7 drives the steering axle and tire assembly 11 to deflect to the right to realize right steering.

[0068] The hydraulic oil flowing through the steering cylinder 7 flows out from the second directional oil port L1, returns to the steering control valve group 5 through the second directional oil port L0, flows through the passage between the working oil port B and the return oil port T2, and returns to the hydraulic oil tank 1 through the return oil port T1.

[0069] This embodiment can achieve the corresponding steering direction and steering speed through the steering cylinder 7, without the need for the driver to move the steering bracket left and right, and can flexibly perform steering operations.

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A steering device for a small silt remover, characterized in that: include: The steering cylinder comprises a first directional oil port L1 and a second directional oil port R1; A hydraulic oil supply assembly, used for supplying hydraulic oil; The steering control valve group includes an electro-hydraulic proportional reversing valve, which is arranged between the hydraulic oil supply assembly and the steering cylinder; A control component includes a steering handle and a controller, wherein the input end of the controller is connected to the steering handle, and the output end is connected to the electro-hydraulic proportional reversing valve. The controller is used to output a control signal of the displacement of the electro-hydraulic proportional reversing valve spool and the displacement direction of the electro-hydraulic proportional reversing valve spool according to a signal from the steering handle; the control signal of the displacement of the electro-hydraulic proportional reversing valve spool is used to control the steering cylinder to output different steering speeds, and the displacement direction control signal of the electro-hydraulic proportional reversing valve spool is used to control the hydraulic oil supply component to be connected to the first direction oil port L1 / the second direction oil port R1, so that the steering cylinder outputs different steering directions.

2. The steering device of the small silt remover according to claim 1, characterized in that: The hydraulic oil supply assembly comprises: Hydraulic oil tank; A hydraulic pump, whose oil inlet is connected to the oil outlet of the hydraulic oil tank; An oil circuit control valve, whose oil inlet P0 is connected to the oil outlet of the hydraulic pump, whose first working oil port CF is connected to the oil inlet P1 of the steering control valve group, whose second working oil port EF is connected to the hydraulic oil tank, and whose control oil port LS0 is connected to the control oil port LS1 of the steering control valve group; The hydraulic oil output by the hydraulic pump is input into the oil circuit control valve, and is input into the steering control valve group after flow distribution by the oil circuit control valve under the control of the control oil port LS0. The excess flow of hydraulic oil flows back to the hydraulic oil tank through the second working oil port EF.

3. The steering device of the small silt remover according to claim 2, characterized in that: The hydraulic oil supply assembly also includes an electric motor for providing power, and the hydraulic pump and the control assembly are installed at the output end of the electric motor.

4. The steering device of the small silt remover according to claim 1, characterized in that: The steering control valve group is provided with an oil inlet P1, an oil return port T1, a first direction oil port L0, a second direction oil port R0 and a control oil port LS1; The oil inlet P1 is connected to the first working oil port CF of the oil circuit control valve in the hydraulic oil supply assembly, and the oil return port T1 is connected to the hydraulic oil tank of the hydraulic oil supply assembly; The first direction oil port L0 is connected to the first direction oil port L1 of the steering cylinder, and the second direction oil port R0 is connected to the second direction oil port R1 of the steering cylinder; The control oil port LS1 is connected to the control oil port LS1 of the oil circuit control valve in the hydraulic oil supply assembly; When the hydraulic oil is input into the steering cylinder from the first directional oil port L0, the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the second directional oil port R0 and flows back to the hydraulic oil tank through the return oil port T1; When the hydraulic oil is input into the steering cylinder from the second directional oil port R0 , the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the first directional oil port L0 , and flows back to the hydraulic oil tank through the oil return port T1 .

5. The steering device of the small silt remover according to claim 4, characterized in that: The electro-hydraulic proportional reversing valve is provided with an oil inlet P2, an oil return port T2, a working oil port A and a working oil port B. The oil inlet P2 is connected to the oil inlet P1 of the steering control valve, and the oil return port T2 is connected to the oil return port T1 of the steering control valve; The working oil port A is connected to the second direction oil port R0 of the steering control valve, and the working oil port B is connected to the first direction oil port L0 of the steering control valve; When the oil inlet P2 is connected to the working oil port A, and the oil return port T2 is connected to the working oil port B, the hydraulic oil is input into the steering cylinder from the second directional oil port R0, and the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the first directional oil port L0; When the oil inlet P2 is connected to the working oil port B and the oil return port T2 is connected to the working oil port A, the hydraulic oil is input into the steering cylinder from the first directional oil port L0, and the hydraulic oil flowing through the steering cylinder returns to the steering control valve group from the second directional oil port R0.

6. The steering device of the small silt remover according to claim 5, characterized in that: The steering control valve group includes a steering system safety valve, The steering system safety valve is arranged on the connecting oil line between the oil inlet P1 of the steering control valve and the oil inlet P2 of the electro-hydraulic proportional reversing valve, and is used to control the pressure of the hydraulic oil input into the electro-hydraulic proportional reversing valve not to exceed the set value, so that the flow of the electro-hydraulic proportional reversing valve is stable; The steering system safety valve is used to control the pressure of the hydraulic oil input to the steering cylinder to not exceed a set value in the connecting oil circuit between the working oil port A and the second direction oil port R0 of the steering control valve and the connecting oil circuit between the working oil port B and the first direction oil port L0 of the steering control valve; When the pressure of the hydraulic oil exceeds a set value, it flows back to the hydraulic oil tank of the hydraulic oil supply assembly through the oil return port T1 of the steering control valve.

7. A control method for a steering device of a small silt remover according to any one of claims 1 to 6, characterized in that: include: Get the signal of the steering handle; According to the signal of the steering handle, the control signal of the displacement amount and displacement direction of the electro-hydraulic proportional reversing valve core is output; Among them, the control signal of the displacement amount of the electro-hydraulic proportional reversing valve core is used to control the steering cylinder to output different steering speeds, and the displacement direction control signal of the electro-hydraulic proportional reversing valve core is used to control the conduction between the hydraulic oil supply component and the first direction oil port L1 / the second direction oil port R1, so that the steering cylinder outputs different steering directions.

8. The control method of the steering device of the small silt cleaning machine according to claim 7, characterized in that: The control signal of outputting the displacement amount of the electro-hydraulic proportional reversing valve core and the displacement direction of the electro-hydraulic proportional reversing valve core according to the signal of the steering handle comprises: According to the signal of the steering handle action direction, the displacement direction of the valve core of the electro-hydraulic proportional reversing valve is determined, and the control signal of the displacement direction of the valve core of the electro-hydraulic proportional reversing valve is output; According to the signal of the steering handle movement amplitude, the displacement of the electro-hydraulic proportional reversing valve core is determined, and the displacement of the electro-hydraulic proportional reversing valve core is output.

9. The control method of the steering device of the small silt cleaning machine according to claim 7, characterized in that: When the signal obtained from the steering handle is to turn left, a control signal of the leftward displacement of the valve core of the electro-hydraulic proportional reversing valve and a control signal of the leftward displacement amount are output according to the signal from the steering handle; The valve core of the electro-hydraulic proportional reversing valve produces a displacement to the left according to the control signal, the oil inlet P2 of the electro-hydraulic proportional reversing valve is connected with the working oil port B, and the oil return port T2 is connected with the working oil port A; The steering control valve group transmits the oil circuit pressure to the control oil port LS0 of the hydraulic oil supply component through the control oil port LS1, and the oil circuit control valve distributes the flow and inputs the hydraulic oil to the oil inlet P1; the hydraulic oil flows through the passage between the oil inlet P2 and the working oil port B, and is input from the first direction oil port L0 to the first direction oil port L1; the steering cylinder drives the steering axle and the tire assembly to deflect to the left, realizing left steering; The hydraulic oil flowing through the steering cylinder flows out from the second directional oil port R1, returns to the steering control valve group through the second directional oil port R0, flows through the passage between the working oil port A and the return oil port T2, and returns to the hydraulic oil tank through the return oil port T1.

10. The control method of the steering device of a small silt remover according to claim 7, characterized in that: When the signal from the steering handle indicates turning right, a control signal for the rightward displacement of the valve core of the electro-hydraulic proportional reversing valve and a control signal for the rightward displacement amount are output according to the signal from the steering handle; The valve core of the electro-hydraulic proportional reversing valve produces a displacement to the right according to the control signal, the oil inlet P2 of the electro-hydraulic proportional reversing valve is connected with the working oil port A, and the oil return port T2 is connected with the working oil port B; The steering control valve group transmits the oil circuit pressure to the control oil port LS0 of the hydraulic oil supply component through the control oil port LS1, and the oil circuit control valve distributes the flow and inputs the hydraulic oil to the oil inlet P1; the hydraulic oil flows through the passage between the oil inlet P2 and the working oil port A, and is input from the first direction oil port R0 to the first direction oil port R1; the steering cylinder drives the steering axle and the tire assembly to deflect to the right, realizing right steering; The hydraulic oil flowing through the steering cylinder flows out from the second directional oil port L1, returns to the steering control valve group through the second directional oil port L0, flows through the passage between the working oil port B and the return oil port T2, and returns to the hydraulic oil tank through the return oil port T1.

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