Hydraulic system of deep tillage, crushing and scarifying machine

Abstract

The present invention provides a hydraulic system of a deep tillage pulverizing and loosening machine, comprising a driving module and an execution module, wherein the driving module comprises more than one execution driving module, the execution driving module is connected to a fuel tank, the execution module comprises a pulverizing and loosening execution module and a moving execution module, the pulverizing and loosening execution module comprises a pulverizing motor oil circuit, a lifting cylinder oil circuit, a corner cylinder oil circuit and a steering cylinder oil circuit, the lifting cylinder oil circuit, the corner cylinder oil circuit and the steering cylinder oil circuit are connected to the fuel tank via a cylinder hydraulic pump oil circuit, the hydraulic system provided by the present invention adopts a unified driving module to drive and control different execution elements, so that the connection between the oil circuits is simple and unified, and different execution elements are controlled by the driving modules corresponding to themselves, so that the oil circuits of each execution element will not affect each other, thereby improving the work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of deep tillage machine control, and in particular to a hydraulic system of a deep tillage pulverizing and scarifying machine. Background Art

[0002] Arable land is the basic resource and condition for human survival. In the 21st century, the population has continued to increase, the arable land has gradually decreased, and the people's living standards have continued to improve. To maintain sustainable agricultural development, we must first ensure the quantity and quality of arable land. Arable land refers to land for growing crops, including cultivated land, newly developed, reclaimed, renovated land, and leisure land; land mainly for growing crops with scattered fruit trees, mulberry trees or other trees; cultivated beach and seashore that can guarantee an average harvest of one season per year. Arable land includes land with a width of less than 1.0m in the south and less than 2m in the north. .0m fixed ditch, canal, road and ridge; the second level classification is paddy field, irrigated land and dry land. Among them, deep plowing is the most basic and important tillage measure in soil cultivation. It means that before a field is to be sown or transplanted, the field must be plowed first to turn up the deep soil in the field and cover the shallow soil. It not only has the greatest impact on soil properties among tillage measures, but also has a wide range of effects and lasts much longer than other measures. In addition, other tillage measures such as harrowing and hoeing are carried out on the basis of this measure. Deep plowing has the functions of turning over, loosening, mixing and crushing soil. Reasonable deep plowing can significantly increase production. Using mechanical deep plowing and loosening can make the tillage layer loose and soft, with good structure, thick active soil layer, flat and fertile, and make the proportions of solid phase, liquid phase and gas phase coordinated to meet the requirements of growth and development. Therefore, if you want to use machinery for deep plowing and loosening, you need a hydraulic system to control and drive it. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic system for a deep plowing crushing and tilling machine. The hydraulic system provided by the present invention adopts a unified driving module to drive and control different actuators, so that the connection between the oil circuits is simple and unified, and different actuators are controlled by the driving modules corresponding to themselves, so that the oil circuits of each actuator will not affect each other, thereby improving work efficiency.

[0004] To achieve the above-mentioned purpose, a hydraulic system of a deep plowing and crushing loosening machine includes a drive module and an execution module, the drive module includes more than one execution drive module, the execution drive module is connected to a fuel tank, the execution module includes a crushing and loosening execution module and a moving execution module, the crushing and loosening execution module includes a crushing motor oil circuit, a lifting cylinder oil circuit, a corner cylinder oil circuit and a steering cylinder oil circuit, the lifting cylinder oil circuit, the corner cylinder oil circuit and the steering cylinder oil circuit are connected to the fuel tank through the cylinder hydraulic pump oil circuit.

[0005] The execution drive module includes a variable control oil circuit, a balancing oil circuit, a control valve oil circuit and an execution hydraulic pump oil circuit. The execution hydraulic pump oil circuit is connected to the oil tank, and the execution hydraulic pump oil circuit is also connected to the balancing oil circuit. The balancing oil circuit is connected to the control valve oil circuit. The control valve oil circuit is also connected to the variable control oil circuit. The variable control oil circuit is connected to the powder loosening motor oil circuit.

[0006] The execution hydraulic pump oil circuit includes an execution hydraulic pump, an execution overflow valve and a filter. One end of the execution hydraulic pump is connected to the oil tank, and the other end of the execution hydraulic pump is connected to one end of the filter. An execution overflow valve is arranged between the execution hydraulic pump and the filter. The execution overflow valve is connected to the oil tank, and the other end of the filter is connected to the balance oil circuit. Therefore, the hydraulic oil drawn out by the execution hydraulic pump and flowing to other oil circuits will first be filtered through the filter to filter out impurities in the hydraulic oil.

[0007] The balanced oil circuit includes a balanced first spring-type one-way valve, a balanced second spring-type one-way valve, a balanced first pilot-operated overflow valve, a balanced second pilot-operated overflow valve, a balanced first overflow valve, a balanced second overflow valve, a balanced first one-way valve, a balanced second one-way valve, a first stop valve, and a second stop valve. The other end of the filter is connected to one end of the balanced first spring-type one-way valve and the balanced second spring-type one-way valve, the other end of the balanced first spring-type one-way valve is connected to one end of the balanced first pilot-operated overflow valve, the other end of the balanced first pilot-operated overflow valve is connected to one end of the balanced first overflow valve, the other end of the balanced first overflow valve is connected to one end of the balanced first one-way valve, and the balanced first one-way valve is connected to one end of the balanced first one-way valve. The other end of the valve is connected to one end of the balanced first overflow valve, the first stop valve is arranged in parallel with the balanced first check valve, the other end of the balanced second spring check valve is connected to one end of the balanced second pilot overflow valve, the other end of the balanced second pilot overflow valve is connected to one end of the balanced second overflow valve, the other end of the balanced second overflow valve is connected to one end of the balanced second check valve, the other end of the balanced second check valve is connected to one end of the balanced second overflow valve, the second stop valve is arranged in parallel with the balanced second check valve, the balanced first pilot overflow valve and the balanced second pilot overflow valve are connected to the control valve oil circuit, and the hydraulic oil pressure flowing to the control valve oil circuit is stabilized by the action of the balanced oil circuit.

[0008] The control valve oil circuit includes a control three-position five-way solenoid reversing valve, a control three-position four-way solenoid reversing valve, a control check valve and a control throttle valve. The balanced second pilot overflow valve is connected to the TP end of the control three-position five-way solenoid reversing valve, the TA end of the control three-position five-way solenoid reversing valve is connected to the UP end of the control three-position four-way solenoid reversing valve, the UA end and UT end of the control three-position four-way solenoid reversing valve are connected to one end of the control check valve, and the other end of the control check valve is connected to the balanced oil circuit. The control throttle valve is arranged in parallel with the control check valve. The balanced first pilot overflow valve is connected to the TB end of the control three-position five-way solenoid reversing valve, the TT end of the control three-position five-way solenoid reversing valve is connected to the oil tank, the UB end of the control three-position four-way solenoid reversing valve is connected to the TT end of the control three-position five-way solenoid reversing valve, and the control three-position five-way solenoid reversing valve is also connected to the variable control oil circuit.

[0009] The variable control oil circuit includes a bidirectional variable pump and a variable piston cylinder. The TP end of the three-position five-way electromagnetic reversing valve is connected to one end of the variable piston cylinder, and the TB end of the three-position five-way electromagnetic reversing valve is connected to the other end of the variable piston cylinder. The control end of the variable piston cylinder is connected to the control end of the bidirectional variable pump. The bidirectional variable pump is connected to the powder loosening motor oil circuit. The control end of the three-position five-way electromagnetic reversing valve is also connected to the control end of the variable piston cylinder. According to this arrangement, when the bidirectional variable pump needs to be reversed, the TP end of the three-position five-way electromagnetic reversing valve is connected to the TT end, and the TA end is connected to the TB end, so that the hydraulic oil flowing to one end of the variable piston cylinder through the balanced second pilot overflow valve flows back to the oil tank, and the hydraulic oil flows to the other end of the variable piston cylinder through the balanced first pilot overflow valve, thereby driving the variable piston cylinder to control the reversal of the bidirectional variable pump.

[0010] The above-mentioned hydraulic system drives the execution module through a unified driving module, so that the oil circuits of each actuator will not affect each other, thereby improving work efficiency. During operation, the hydraulic oil circulates between the driving module and the execution module. When the oil circuit flow direction needs to be changed, the hydraulic oil flowing through the driving module is controlled by the bidirectional variable pump to flow in the opposite direction, thereby controlling the reversal of the entire oil circuit, and the operation is simple.

[0011] Furthermore, the cylinder hydraulic pump oil circuit includes a cylinder hydraulic pump, a two-position three-way reversing valve and a cylinder hydraulic pump overflow valve, one end of the cylinder hydraulic pump is connected to the oil tank, the PF end of the two-position three-way reversing valve is connected to the other end of the cylinder hydraulic pump, the CF end of the two-position three-way reversing valve is connected to the lifting cylinder oil circuit and the turning cylinder oil circuit, the EF end of the two-position three-way reversing valve is connected to the steering cylinder oil circuit, and the control end of the two-position three-way reversing valve is connected to the oil tank through the cylinder hydraulic pump overflow valve. According to this arrangement, when it is necessary to control the lifting cylinder and the turning cylinder, the two-position three-way reversing valve is controlled to link its CF end and EF end with the PF end, so that the hydraulic oil can flow to the lifting cylinder, the turning cylinder and the steering cylinder. When it is not necessary for the hydraulic oil to flow to the steering cylinder, the two-position three-way reversing valve is controlled to connect the CF end and the PF end.

[0012] Furthermore, the lifting cylinder oil circuit includes a lifting three-position five-way solenoid valve, a lifting one-way valve, a lifting first hydraulically controlled one-way valve, a lifting second hydraulically controlled one-way valve and a lifting cylinder, the CF end of the two-position three-way reversing valve is connected to the E1P end of the lifting three-position five-way solenoid valve, a lifting one-way valve is arranged between the CF end of the two-position three-way reversing valve and the E1P end of the lifting three-position five-way solenoid valve, the E1A end of the lifting three-position five-way solenoid valve is connected to one end of the lifting first hydraulically controlled one-way valve, and the other end of the lifting first hydraulically controlled one-way valve is connected to one end of the lifting cylinder; the E1B end of the lifting three-position five-way solenoid valve is connected to one end of the lifting second hydraulically controlled one-way valve The other end of the second hydraulically controlled one-way valve for lifting is connected to the other end of the lifting cylinder, and the E1T end of the lifting three-position five-way solenoid valve is connected to the oil tank. When the lifting cylinder needs to be driven, the lifting three-position five-way solenoid valve is controlled to connect its E1P end to the E1A end, and the E1B end of the lifting three-position five-way solenoid valve is connected to the E1T end, thereby, the hydraulic oil can flow to the lifting cylinder, and the lifting cylinder is driven to one end; when the lifting cylinder needs to be driven to the other end, the lifting three-position five-way solenoid valve is controlled to connect its E1P end to the E1B end, and the E1A end of the lifting three-position five-way solenoid valve is connected to the E1T end, thereby, the lifting cylinder can be driven to the other end.

[0013] Furthermore, the angle cylinder oil circuit includes an angle three-position five-way solenoid valve, an angle check valve, a first angle hydraulically controlled check valve, a second angle hydraulically controlled check valve and a lifting cylinder, the CF end of the two-position three-way reversing valve is connected to the E2P end of the angle three-position five-way solenoid valve, a lifting check valve is arranged between the CF end of the two-position three-way reversing valve and the E2P end of the angle three-position five-way solenoid valve, the E2A end of the angle three-position five-way solenoid valve is connected to one end of the first angle hydraulically controlled check valve, and the other end of the first angle hydraulically controlled check valve is connected to one end of the angle cylinder; the E2B end of the angle three-position five-way solenoid valve is connected to one end of the second angle hydraulically controlled check valve The other end of the second hydraulically controlled one-way valve is connected to the other end of the angle cylinder, and the E1T end of the three-position five-way solenoid valve is connected to the oil tank. When the angle cylinder needs to be driven, the three-position five-way solenoid valve is controlled to connect its E2P end to the E2A end, and the E2B end of the three-position five-way solenoid valve is connected to the E2T end, thereby, the hydraulic oil can flow to the angle cylinder, and the angle cylinder is driven to one end; when the angle cylinder needs to be driven to the other end, the three-position five-way solenoid valve is controlled to connect its E2P end to the E2B end, and the E2A end of the three-position five-way solenoid valve is connected to the E2T end, thereby, the angle cylinder can be driven to the other end.

[0014] Furthermore, a lifting angle control oil circuit is provided between the cylinder hydraulic pump oil circuit and the angle cylinder oil circuit and the lifting cylinder oil circuit, and the lifting angle control oil circuit includes a lifting angle control first relief valve, a lifting angle filter, a lifting angle second relief valve, a lifting angle third relief valve and a lifting angle fourth relief valve, the CF end of the two-position three-way reversing valve is connected to one end of the lifting angle filter, the other end of the lifting angle filter is connected to one end of the first lifting angle relief valve, the other end of the first lifting angle relief valve is connected to the oil tank, the CF end of the two-position three-way reversing valve is also connected to one end of the second lifting angle relief valve, and the other end of the second lifting angle relief valve is connected to the oil tank. One end is connected to the control end of the lifting three-position five-way solenoid valve and the control end of the corner three-position five-way solenoid valve, one end of the lifting angle third overflow valve is connected between the CF end of the two-position three-way reversing valve and one end of the lifting angle second overflow valve, and the other end of the lifting angle third overflow valve is connected to the oil tank; one end of the lifting angle fourth overflow valve is connected between the lifting angle second overflow valve and the control end of the lifting three-position five-way solenoid valve and the control end of the corner three-position five-way solenoid valve, and the other end of the lifting angle fourth overflow valve is connected to the oil tank. According to this arrangement, the lifting three-position five-way solenoid valve and the corner three-position five-way solenoid valve are controlled by the lifting angle control oil circuit.

[0015] Furthermore, the steering cylinder oil circuit includes a circulating oil circuit, a steering cylinder, a steering oil drain overflow valve and a steering oil inlet check valve, the EF end of the two-position three-way reversing valve is connected to one end of the steering oil inlet check valve, the other end of the steering oil inlet check valve is connected to the circulating oil circuit, one end of the steering oil inlet check valve is also connected to one end of the steering oil drain overflow valve, the other end of the steering oil drain overflow valve is connected to the circulating oil circuit, and the circulating oil circuit is connected to the steering cylinder; the steering cylinder is provided with a first steering cylinder and a second steering cylinder, the circulating oil circuit includes a steering regulating valve and a steady flow oil circuit, the OP end of the steering regulating valve is connected to the other end of the steering oil inlet check valve, the OT end of the steering regulating valve is connected to the other end of the steering oil drain overflow valve and is connected to the oil tank, the steering regulating valve The OR end is connected to one end of the first steering cylinder and the other end of the second steering cylinder, and the OL end of the steering regulating valve is connected to one end of the second steering cylinder and the other end of the first steering cylinder; a steady flow oil circuit is provided between the OR end and the OL end of the steering regulating valve, thereby, when it is necessary to drive the steering cylinder to turn to the left, the steering regulating valve is controlled to connect its OP end to the OL end, at this time, the hydraulic oil flows from the OL end of the steering regulating valve to one end of the second steering cylinder and the other end of the first steering cylinder, thereby achieving turning to the left; when it is necessary to drive the steering cylinder to turn to the right, the steering regulating valve is controlled to connect its OP end to the OR end, at this time, the hydraulic oil flows from the OR end of the steering regulating valve to one end of the first steering cylinder and the other end of the second steering cylinder, thereby achieving turning to the right.

[0016] Furthermore, the steady-flow oil circuit includes a first steering overflow valve, a second steering overflow valve, a first steering check valve and a second steering check valve, one end of the first steering overflow valve is connected to the OR end of the steering regulating valve, the other end of the first steering overflow valve is connected to one end of the second steering overflow valve, the other end of the second steering overflow valve is connected to the OL end of the steering regulating valve, the other end of the first steering overflow valve and one end of the second steering overflow valve are also connected to the oil tank, one end of the first steering check valve is connected to the OR end of the steering regulating valve, the other end of the first steering check valve is connected to one end of the second steering check valve, the other end of the second steering check valve is connected to the OL end of the steering regulating valve, and the first steering check valve and the second steering check valve are also connected to the oil tank. Thus, the steady-flow oil circuit is used to prevent large fluctuations in the hydraulic oil flowing to the steering cylinder, thereby stabilizing the oil circuit.

[0017] Furthermore, the powder loosening motor oil circuit includes a powder loosening motor and a motor oil drain circuit, one end of the two-way variable pump is connected to one end of the powder loosening motor, and the other end of the powder loosening motor is connected to the other end of the two-way variable pump, and a motor oil drain circuit is provided between the powder loosening motor and the two-way variable pump, and the motor oil drain circuit includes a motor oil drain three-position two-way reversing valve and a motor oil drain overflow valve, the MA end of the motor oil drain three-position two-way reversing valve is connected to one end of the powder loosening motor, the MB end of the motor oil drain three-position two-way reversing valve is connected to the other end of the powder loosening motor, the MT end of the motor oil drain three-position two-way reversing valve is connected to one end of the motor oil drain overflow valve, and the other end of the motor oil drain overflow valve is connected to the oil tank. According to this arrangement, when the powder loosening motor stops working, the hydraulic oil remaining in the powder loosening motor flows back to the oil tank through the motor oil drain circuit.

[0018] Furthermore, the execution drive module is also connected to the mobile execution module, which includes a brake motor, a brake control valve and a brake two-position two-way reversing valve. One end of the two-way variable pump is connected to one end of the brake motor, and the other end of the brake motor is connected to the other end of the two-way variable pump. A brake control valve is also provided on the brake motor. The brake control valve is connected to the SA end of the brake two-position two-way reversing valve, and the SP end of the brake two-position two-way reversing valve is connected to the execution drive module. The ST end of the brake two-position two-way reversing valve is connected to the oil tank. Therefore, when braking is required, the SP end of the brake two-position two-way reversing valve is controlled to be connected to the SA end, so that the hydraulic oil can flow to the brake control valve, thereby realizing braking. When braking is stopped, the SA end of the brake two-position two-way reversing valve is controlled to be connected to the ST end, so that the hydraulic oil can flow back to the oil tank.

[0019] Furthermore, one end of the cylinder hydraulic pump connected to the oil tank is connected to a fan motor oil circuit, and the fan motor oil circuit includes a fan motor hydraulic pump, a fan motor and a fan motor overflow valve. One end of the fan motor hydraulic pump is connected to the oil tank, and the other end of the fan motor hydraulic pump is connected to one end of the fan motor, and the other end of the fan motor is connected to the oil tank. A fan motor overflow valve is provided between the two ends of the fan motor, and one end of the fan motor overflow valve is connected to one end of the fan motor connected to the fan motor hydraulic pump, and the other end of the fan motor overflow valve is connected to one end of the fan motor connected to the oil tank. With this arrangement, heat dissipation is achieved through the action of the fan motor oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the hydraulic system of the deep tillage pulverizing and scarifying machine of the present invention.

[0021] Figure 2 It is a schematic diagram of the execution driving module of the present invention.

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0023] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0024] Figure 5 for Figure 2 Enlarged view of point C in the middle.

[0025] Figure 6 It is a schematic diagram of the oil circuit of the oil cylinder hydraulic pump of the present invention.

[0026] Figure 7 It is a schematic diagram of the lifting cylinder oil circuit and the corner cylinder oil circuit of the present invention.

[0027] Figure 8 for Figure 7 Enlarged view of point D in the middle.

[0028] Fig. 9 for Figure 6 Enlarged view of point E in the middle.

[0029] Fig.10 It is a schematic diagram of the oil circuit of the powder loose motor of the present invention.

[0030] Fig.11 It is a schematic diagram of the mobile execution module of the present invention.

[0031] Fig.12 for Fig.11 Enlarged view of point F in the middle.

[0032] Fig.13 for Figure 6 Enlarged view of point G in the middle. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1 to 13 As shown, a hydraulic system of a deep tillage pulverizing and loosening machine includes a drive module 1y and an execution module 2y, wherein the drive module 1y includes more than one execution drive module 10y, and the execution drive module 10y is connected to the oil tank 0y. The execution module 2y includes a pulverizing and loosening execution module 4y and a moving execution module 22y. The pulverizing and loosening execution module 4y includes a pulverizing motor oil circuit 41y, a lifting cylinder oil circuit 42y, a corner cylinder oil circuit 43y and a steering cylinder oil circuit 44y. The lifting cylinder oil circuit 42y, the corner cylinder oil circuit 43y and the steering cylinder oil circuit 44y are connected to the oil tank 0y via a cylinder hydraulic pump oil circuit 45y.

[0035] like Figure 2As shown, the execution drive module 10y includes a variable control oil circuit 101y, a balancing oil circuit 102y, a control valve oil circuit 103y and an execution hydraulic pump oil circuit 104y. The execution hydraulic pump oil circuit 104y is connected to the oil tank 0y, and the execution hydraulic pump oil circuit 104y is also connected to the balancing oil circuit 102y. The balancing oil circuit 102y is connected to the control valve oil circuit 103y. The control valve oil circuit 103y is also connected to the variable control oil circuit 101y. The variable control oil circuit 101y is connected to the powder loosening motor oil circuit 41y.

[0036] like Figure 2 and Figure 5 As shown, the execution hydraulic pump oil circuit 104y includes an execution hydraulic pump 1041y, an execution overflow valve 1042y and a filter 1043y, one end of the execution hydraulic pump 1041y is connected to the oil tank 0y, the other end of the execution hydraulic pump 1041y is connected to one end of the filter 1043y, and an execution overflow valve 1042y is arranged between the execution hydraulic pump 1041y and the filter 1043y, the execution overflow valve 1042y is connected to the oil tank 0y, and the other end of the filter 1043y is connected to the balance oil circuit 102y, thereby, the hydraulic oil drawn out by the execution hydraulic pump and flowing to other oil circuits will first be filtered through the filter to filter out impurities in the hydraulic oil.

[0037] like Figure 3As shown, the balanced oil circuit 102y includes a balanced first spring check valve 1021y, a balanced second spring check valve 1022y, a balanced first pilot relief valve 1023y, a balanced second pilot relief valve 1024y, a balanced first relief valve 1025y, a balanced second relief valve 1026y, a balanced first check valve 1027y, a balanced second check valve 1028y, a first stop valve 1029y and a second stop valve 1020y, and the filter 10 The other end of 43y is connected to one end of the balanced first spring-type one-way valve 1021y and the balanced second spring-type one-way valve 1022y, the other end of the balanced first spring-type one-way valve 1021y is connected to one end of the balanced first pilot-operated overflow valve 1023y, the other end of the balanced first pilot-operated overflow valve 1023y is connected to one end of the balanced first overflow valve 1025y, and the other end of the balanced first overflow valve 1025y is connected to one end of the balanced first one-way valve 1027y The other end of the balanced first check valve 1027y is connected to one end of the balanced first relief valve 1025y, the first stop valve 1029y is arranged in parallel with the balanced first check valve 1027y, the other end of the balanced second spring check valve 1022y is connected to one end of the balanced second pilot relief valve 1024y, the other end of the balanced second pilot relief valve 1024y is connected to one end of the balanced second relief valve 1026y, the balanced second relief valve 1026y The other end of y is connected to one end of the balanced second one-way valve 1028y, the other end of the balanced second one-way valve 1028y is connected to one end of the balanced second overflow valve 1026y, the second stop valve 1020y is arranged in parallel with the balanced second one-way valve 1028y, the balanced first pilot overflow valve 1023y and the balanced second pilot overflow valve 1024y are connected to the control valve oil circuit 103y, and the hydraulic oil pressure flowing to the control valve oil circuit is stabilized through the action of the balanced oil circuit.

[0038] like Figure 4As shown, the control valve oil circuit 103y includes a control three-position five-way solenoid reversing valve 1031y, a control three-position four-way solenoid reversing valve 1032y, a control check valve 1033y and a control throttle valve 1034y, the balanced second pilot relief valve 1024y is connected to the TP end of the control three-position five-way solenoid reversing valve 1031y, the TA end of the control three-position five-way solenoid reversing valve 1031y is connected to the UP end of the control three-position four-way solenoid reversing valve 1032y, and the UA end and UT end of the control three-position four-way solenoid reversing valve 1032y are connected to one end of the control check valve 1033y The other end of the control check valve 1033y is connected to the balance oil circuit 102y, the control throttle valve 1034y is arranged in parallel with the control check valve 1033y, the balanced first pilot overflow valve 1023y is connected to the TB end of the control three-position five-way solenoid reversing valve 1031y, the TT end of the control three-position five-way solenoid reversing valve 1031y is connected to the oil tank 0y, the UB end of the control three-position four-way solenoid reversing valve 1032y is connected to the TT end of the control three-position five-way solenoid reversing valve 1031y, and the control three-position five-way solenoid reversing valve 1031y is also connected to the variable control oil circuit 101y.

[0039] like Figure 5 As shown, the variable control oil circuit 101y includes a bidirectional variable pump 1011y and a variable piston cylinder 1012y, the TP end of the three-position five-way electromagnetic reversing valve 1031y is connected to one end of the variable piston cylinder 1012y, and the TB end of the three-position five-way electromagnetic reversing valve 1031y is connected to the other end of the variable piston cylinder 1012y, the control end 10121y of the variable piston cylinder 1012y is connected to the control end 10111y of the bidirectional variable pump 1011y, and the bidirectional variable pump 1011y is connected to the powder loosening motor oil circuit 41y, and the three-position five-way electromagnetic reversing valve 1031y is controlled. The control end 10311y of the three-position five-way solenoid reversing valve 1031y is also connected to the control end 10121y of the variable piston cylinder 1012y. According to this arrangement, when the bidirectional variable pump needs to be reversed, the TP end of the three-position five-way solenoid reversing valve is connected to the TT end, and the TA end is connected to the TB end, so that the hydraulic oil flowing to one end of the variable piston cylinder through the balanced second pilot overflow valve flows back to the oil tank, and the hydraulic oil flows to the other end of the variable piston cylinder through the balanced first pilot overflow valve, thereby driving the variable piston cylinder to control the reversal of the bidirectional variable pump.

[0040] like Figure 6As shown, the cylinder hydraulic pump oil circuit 45y includes a cylinder hydraulic pump 451y, a two-position three-way reversing valve 452y and a cylinder hydraulic pump overflow valve 453y. One end of the cylinder hydraulic pump 451y is connected to the oil tank 0y, the PF end of the two-position three-way reversing valve 452y is connected to the other end of the cylinder hydraulic pump 451y, the CF end of the two-position three-way reversing valve 452y is connected to the lifting cylinder oil circuit 42y and the angle cylinder oil circuit 43y, and the EF end of the two-position three-way reversing valve 452y is connected to the steering oil Cylinder oil circuit 44y, the control end 4521y of the two-position three-way reversing valve 452y is connected to the oil tank 0y through the cylinder hydraulic pump overflow valve 453y. According to this arrangement, when it is necessary to control the lifting cylinder and the angle cylinder, the two-position three-way reversing valve is controlled to link its CF end and EF end with the PF end, so that the hydraulic oil can flow to the lifting cylinder, the angle cylinder and the steering cylinder. When it is not necessary for the hydraulic oil to flow to the steering cylinder, the two-position three-way reversing valve is controlled to connect the CF end and the PF end.

[0041] like Figure 7 and Figure 8 The lifting cylinder oil circuit 42y includes a lifting three-position five-way solenoid valve 421y, a lifting check valve 422y, a lifting first hydraulically controlled check valve 423y, a lifting second hydraulically controlled check valve 424y and a lifting cylinder 425y. The CF end of the two-position three-way reversing valve 452y is connected to the E1P end of the lifting three-position five-way solenoid valve 421y. A lifting check valve 422y is provided between the CF end of the two-position three-way reversing valve 452y and the E1P end of the lifting three-position five-way solenoid valve 421y. The E1A end of the lifting three-position five-way solenoid valve 421y is connected to one end of the lifting first hydraulically controlled check valve 423y, and the other end of the lifting first hydraulically controlled check valve 423y is connected to one end of the lifting cylinder 425y. The lifting three-position five-way solenoid valve 42 1y's E1B end is connected to one end of the second hydraulically controlled one-way valve 424y for lifting, the other end of the second hydraulically controlled one-way valve 424y for lifting is connected to the other end of the lifting cylinder 425y, and the E1T end of the lifting three-position five-way solenoid valve 421y is connected to the oil tank 0y. When it is necessary to drive the lifting cylinder, the lifting three-position five-way solenoid valve is controlled to connect its E1P end to the E1A end, and the E1B end of the lifting three-position five-way solenoid valve is connected to the E1T end, thereby, the hydraulic oil can flow to the lifting cylinder, and the lifting cylinder is driven to one end; when it is necessary to drive the lifting cylinder to the other end, the lifting three-position five-way solenoid valve is controlled to connect its E1P end to the E1B end, and the E1A end of the lifting three-position five-way solenoid valve is connected to the E1T end, thereby, the lifting cylinder can be driven to the other end.

[0042] like Figure 7 and Figure 8The angle cylinder oil circuit 43y includes an angle three-position five-way solenoid valve 431y, an angle check valve 432y, a first angle hydraulically controlled one-way valve 433y, an angle second hydraulically controlled one-way valve 434y and a lifting cylinder 435y. The CF end of the two-position three-way reversing valve 452y is connected to the E2P end of the angle three-position five-way solenoid valve 431y. A lifting one-way valve 432y is provided between the CF end of the two-position three-way reversing valve 452y and the E2P end of the angle three-position five-way solenoid valve 431y. The E2A end of the angle three-position five-way solenoid valve 431y is connected to one end of the angle first hydraulically controlled one-way valve 433y, and the other end of the angle first hydraulically controlled one-way valve 433y is connected to one end of the angle cylinder 435y. The angle three-position five-way solenoid valve 43 1y's E2B end is connected to one end of the second hydraulically controlled one-way valve 434y for the angle, and the other end of the second hydraulically controlled one-way valve 434y for the angle is connected to the other end of the angle cylinder 435y, and the E1T end of the corner three-position five-way solenoid valve 431y is connected to the oil tank 0y. When it is necessary to drive the angle cylinder, the three-position five-way solenoid valve for the angle is controlled to connect its E2P end to the E2A end, and the E2B end of the three-position five-way solenoid valve for the angle is connected to the E2T end, thereby, the hydraulic oil can flow to the angle cylinder, and the angle cylinder is driven to one end; when it is necessary to drive the angle cylinder to the other end, the three-position five-way solenoid valve for the angle is controlled to connect its E2P end to the E2B end, and the E2A end of the three-position five-way solenoid valve for the angle is connected to the E2T end, thereby, the angle cylinder can be driven to the other end.

[0043] like Figure 8As shown, a lifting angle control oil circuit 46y is also provided between the cylinder hydraulic pump oil circuit 45y and the angle cylinder oil circuit 43y and the lifting cylinder oil circuit 42y, and the lifting angle control oil circuit 46y includes a lifting angle control first relief valve 461y, a lifting angle filter 462y, a lifting angle second relief valve 463y, a lifting angle third relief valve 464y and a lifting angle fourth relief valve 465y, a CF end of the two-position three-way reversing valve 452y is connected to one end of the lifting angle filter 462y, the other end of the lifting angle filter 462y is connected to one end of the lifting angle first relief valve 461y, the other end of the lifting angle first relief valve 461y is connected to the oil tank 0y, the CF end of the two-position three-way reversing valve 452y is also connected to one end of the lifting angle second relief valve 463y, the other end of the lifting angle second relief valve 463y The first end is connected to the control end 4211y of the lifting three-position five-way solenoid valve 421y and the control end 4311y of the corner three-position five-way solenoid valve 431y, one end of the lifting angle third overflow valve 464y is connected between the CF end of the two-position three-way reversing valve 452y and one end of the lifting angle second overflow valve 463y, and the other end of the lifting angle third overflow valve 464y is connected to the oil tank 0y; one end of the lifting angle fourth overflow valve 465y is connected between the lifting angle second overflow valve 463y and the control end 4211y of the lifting three-position five-way solenoid valve 421y and the control end 4311y of the corner three-position five-way solenoid valve 431y, and the other end of the lifting angle fourth overflow valve 465y is connected to the oil tank 0y. Thus, the lifting three-position five-way solenoid valve and the corner three-position five-way solenoid valve are controlled by the lifting angle control oil circuit.

[0044] like Figure 6 , 7 and Fig. 9As shown, the steering cylinder oil circuit 44y includes a circulating oil circuit 441y, a steering cylinder 442y, a steering oil drain relief valve 443y and a steering oil inlet check valve 444y, the EF end of the two-position three-way reversing valve 452y is connected to one end of the steering oil inlet check valve 444y, the other end of the steering oil inlet check valve 444y is connected to the circulating oil circuit 441y, one end of the steering oil inlet check valve 444y is also connected to one end of the steering oil drain relief valve 443y, the other end of the steering oil drain relief valve 443y is connected to the circulating oil circuit 441y, and the circulating oil circuit 441y is connected to the steering cylinder 442y; the steering cylinder 442y is provided with a first steering The circulating oil circuit 441y includes a steering regulating valve 445y and a steady flow oil circuit 446y. The OP end of the steering regulating valve 445y is connected to the other end of the steering oil inlet check valve 444y. The OT end of the steering regulating valve 445y is connected to the other end of the steering oil drain overflow valve 443y and is connected to the oil tank 0y. The OR end of the steering regulating valve 445y is connected to one end of the first steering cylinder 4421y and the other end of the second steering cylinder 4422y. The OL end of the steering regulating valve 445y is connected to one end of the second steering cylinder 4422y and the other end of the first steering cylinder 4421y (at Figure 7 As shown in the figure); a steady flow oil circuit 446y is provided between the OR end and the OL end of the steering regulating valve 445y, thereby, when it is necessary to drive the steering cylinder to turn to the left, the steering regulating valve is controlled to connect its OP end to the OL end, at which time, the hydraulic oil flows from the OL end of the steering regulating valve to one end of the second steering cylinder and the other end of the first steering cylinder, thereby realizing turning to the left; when it is necessary to drive the steering cylinder to turn to the right, the steering regulating valve is controlled to connect its OP end to the OR end, at which time, the hydraulic oil flows from the OR end of the steering regulating valve to one end of the first steering cylinder and the other end of the second steering cylinder, thereby realizing turning to the right.

[0045] like Fig. 9As shown, the steady flow oil circuit 441y includes a first steering relief valve 4411y, a second steering relief valve 4412y, a first steering check valve 4413y and a second steering check valve 4414y, one end of the first steering relief valve 4411y is connected to the OR end of the steering regulating valve 445y, the other end of the first steering relief valve 4411y is connected to one end of the steering second relief valve 4412y, the other end of the steering second relief valve 4412y is connected to the OL end of the steering regulating valve 445y, the other end of the first steering relief valve 4411y is connected to the second steering relief valve 4412y, the other end of the steering second relief valve 4412y is connected to the OL end of the steering regulating valve 445y, and the other end of the first steering relief valve 4411y is connected to the second steering relief valve 4412y. One end of 412y is also connected to the oil tank 0y, one end of the first steering one-way valve 4413y is connected to the OR end of the steering regulating valve 445y, the other end of the first steering one-way valve 4413y is connected to one end of the second steering one-way valve 4414y, the other end of the second steering one-way valve 4414y is connected to the OL end of the steering regulating valve 445y, and the first steering one-way valve 4413y and the second steering one-way valve 4414y are also connected to the oil tank 0y. According to this arrangement, the hydraulic oil leading to the steering cylinder will not have large fluctuations through the steady flow oil circuit, so that the oil circuit is stable.

[0046] like Fig.10 As shown, the powder loosening motor oil circuit 41y includes a powder loosening motor 411y and a motor oil drain circuit 412y, one end of the two-way variable pump 101y is connected to one end of the powder loosening motor 411y, and the other end of the powder loosening motor 411y is connected to the other end of the two-way variable pump 101y, and a motor oil drain circuit 412y is provided between the powder loosening motor 411y and the two-way variable pump 101y, and the motor oil drain circuit 412y includes a motor oil drain three-position two-way reversing valve 413y and a motor oil drain overflow valve 414y, The MA end of the motor oil drain three-position two-way reversing valve 413y is connected to one end of the powder loosening motor 411y, the MB end of the motor oil drain three-position two-way reversing valve 413y is connected to the other end of the powder loosening motor 411y, the MT end of the motor oil drain three-position two-way reversing valve 413y is connected to one end of the motor oil drain overflow valve 414y, and the other end of the motor oil drain overflow valve 414y is connected to the oil tank 0y. According to this arrangement, when the powder loosening motor stops working, the hydraulic oil remaining in the powder loosening motor flows back to the oil tank through the motor oil drain oil circuit.

[0047] like Fig.11 and Fig.12As shown, the execution drive module 10y is also connected to the mobile execution module 22y, and the mobile execution module 22y includes a brake motor 221y, a brake control valve 222y and a brake two-position two-way reversing valve 223y. One end of the two-way variable pump 101y is connected to one end of the brake motor 221y, and the other end of the brake motor 221y is connected to the other end of the two-way variable pump 101y. A brake control valve 222y is also provided on the brake motor 221y, and the brake control valve 222y is connected to The SA end of the brake two-position two-way reversing valve 223y, the SP end of the brake two-position two-way reversing valve 223y is connected to the execution drive module 10y, and the ST end of the brake two-position two-way reversing valve 223y is connected to the oil tank 0y. Therefore, when braking is required, the SP end of the brake two-position two-way reversing valve is controlled to be connected to the SA end, so that the hydraulic oil can flow to the brake control valve, thereby achieving braking. When stopping braking, the SA end of the brake two-position two-way reversing valve is controlled to be connected to the ST end, so that the hydraulic oil can flow back to the oil tank.

[0048] like Figure 6 and Fig.13 As shown, one end of the cylinder hydraulic pump 451y connected to the oil tank 0y is connected to the fan motor oil circuit 47y, and the fan motor oil circuit 47y includes a fan motor hydraulic pump 471y, a fan motor 472y and a fan motor overflow valve 473y. One end of the fan motor hydraulic pump 471y is connected to the oil tank 0y, and the other end of the fan motor hydraulic pump 471y is connected to one end of the fan motor 472y, and the other end of the fan motor 472y is connected to the oil tank 0y. A fan motor overflow valve 473y is provided between the two ends of the fan motor 472y, and one end of the fan motor overflow valve 473y is connected to one end of the fan motor 472y connected to the fan motor hydraulic pump 471y, and the other end of the fan motor overflow valve 473y is connected to one end of the fan motor 472y connected to the oil tank 0y. With this arrangement, heat dissipation is achieved through the action of the fan motor oil circuit.

[0049] The above-mentioned hydraulic system drives the execution module through a unified driving module, so that the oil circuits of each actuator will not affect each other, thereby improving work efficiency. During operation, the hydraulic oil circulates between the driving module and the execution module. When the oil circuit flow direction needs to be changed, the hydraulic oil flowing through the driving module is controlled by the bidirectional variable pump to flow in the opposite direction, thereby controlling the reversal of the entire oil circuit, and the operation is simple.

Claims

1. A hydraulic system for a deep tillage, pulverizing and scarifying machine, comprising a driving module and an execution module, characterized in that: The driving module includes more than one execution driving module, the execution driving module is connected to the oil tank, the execution module includes a crushing and loosening execution module and a moving execution module, the crushing and loosening execution module includes a crushing and loosening motor oil circuit, a lifting cylinder oil circuit, a corner cylinder oil circuit and a steering cylinder oil circuit, and the lifting cylinder oil circuit, the corner cylinder oil circuit and the steering cylinder oil circuit are connected to the oil tank through the cylinder hydraulic pump oil circuit; The execution drive module includes a variable control oil circuit, a balancing oil circuit, a control valve oil circuit and an execution hydraulic pump oil circuit, wherein the execution hydraulic pump oil circuit is connected to the oil tank, the execution hydraulic pump oil circuit is also connected to the balancing oil circuit, the balancing oil circuit is connected to the control valve oil circuit, the control valve oil circuit is also connected to the variable control oil circuit, and the variable control oil circuit is connected to the powder loosening motor oil circuit; The execution hydraulic pump oil circuit includes an execution hydraulic pump, an execution overflow valve and a filter, one end of the execution hydraulic pump is connected to the oil tank, the other end of the execution hydraulic pump is connected to one end of the filter, an execution overflow valve is arranged between the execution hydraulic pump and the filter, the execution overflow valve is connected to the oil tank, and the other end of the filter is connected to the balance oil circuit; The balanced oil circuit includes a balanced first spring-type one-way valve, a balanced second spring-type one-way valve, a balanced first pilot-operated overflow valve, a balanced second pilot-operated overflow valve, a balanced first overflow valve, a balanced second overflow valve, a balanced first one-way valve, a balanced second one-way valve, a first stop valve, and a second stop valve. The other end of the filter is connected to one end of the balanced first spring-type one-way valve and the balanced second spring-type one-way valve, the other end of the balanced first spring-type one-way valve is connected to one end of the balanced first pilot-operated overflow valve, the other end of the balanced first pilot-operated overflow valve is connected to one end of the balanced first overflow valve, and the other end of the balanced first overflow valve is connected to the balanced first one-way valve. The first stop valve is connected to one end of the balanced first check valve, the other end of the balanced second spring check valve is connected to one end of the balanced second pilot relief valve, the other end of the balanced second pilot relief valve is connected to one end of the balanced second relief valve, the other end of the balanced second relief valve is connected to one end of the balanced second check valve, the other end of the balanced second check valve is connected to one end of the balanced second relief valve, the second stop valve is connected to the balanced second check valve in parallel, and the balanced first pilot relief valve and the balanced second pilot relief valve are connected to the control valve oil circuit; The control valve oil circuit includes a control three-position five-way solenoid reversing valve, a control three-position four-way solenoid reversing valve, a control check valve and a control throttle valve. The balanced second pilot overflow valve is connected to the TP end of the control three-position five-way solenoid reversing valve, the TA end of the control three-position five-way solenoid reversing valve is connected to the UP end of the control three-position four-way solenoid reversing valve, the UA end and the UT end of the control three-position four-way solenoid reversing valve are connected to one end of the control check valve, and the other end of the control check valve is connected to the balanced oil circuit. The control throttle valve is arranged in parallel with the control check valve. The balanced first pilot overflow valve is connected to the TB end of the control three-position five-way solenoid reversing valve, the TT end of the control three-position five-way solenoid reversing valve is connected to the oil tank, the UB end of the control three-position four-way solenoid reversing valve is connected to the TT end of the control three-position five-way solenoid reversing valve, and the control three-position five-way solenoid reversing valve is also connected to the variable control oil circuit; The variable control oil circuit includes a bidirectional variable pump and a variable piston cylinder, the TP end for controlling the three-position five-way electromagnetic reversing valve is connected to one end of the variable piston cylinder, the TB end for controlling the three-position five-way electromagnetic reversing valve is connected to the other end of the variable piston cylinder, the control end of the variable piston cylinder is connected to the control end of the bidirectional variable pump, the bidirectional variable pump is connected to the powder loosening motor oil circuit, and the control end for controlling the three-position five-way electromagnetic reversing valve is also connected to the control end of the variable piston cylinder; The powder loosening motor oil circuit includes a powder loosening motor and a motor oil drain oil circuit, one end of the two-way variable pump is connected to one end of the powder loosening motor, the other end of the powder loosening motor is connected to the other end of the two-way variable pump, and a motor oil drain oil circuit is provided between the powder loosening motor and the two-way variable pump, the motor oil drain oil circuit includes a motor oil drain three-position two-way reversing valve and a motor oil drain overflow valve, the MA end of the motor oil drain three-position two-way reversing valve is connected to one end of the powder loosening motor, the MB end of the motor oil drain three-position two-way reversing valve is connected to the other end of the powder loosening motor, the MT end of the motor oil drain three-position two-way reversing valve is connected to one end of the motor oil drain overflow valve, and the other end of the motor oil drain overflow valve is connected to the oil tank; The execution drive module is also connected to the mobile execution module, which includes a brake motor, a brake control valve and a brake two-position two-way reversing valve. One end of the two-way variable pump is connected to one end of the brake motor, and the other end of the brake motor is connected to the other end of the two-way variable pump. A brake control valve is also provided on the brake motor. The brake control valve is connected to the SA end of the brake two-position two-way reversing valve, the SP end of the brake two-position two-way reversing valve is connected to the execution drive module, and the ST end of the brake two-position two-way reversing valve is connected to the oil tank.

2. The hydraulic system of a deep tillage pulverizing and scarifying machine according to claim 1, characterized in that: The cylinder hydraulic pump oil circuit includes a cylinder hydraulic pump, a two-position three-way reversing valve and a cylinder hydraulic pump overflow valve. One end of the cylinder hydraulic pump is connected to the oil tank, the PF end of the two-position three-way reversing valve is connected to the other end of the cylinder hydraulic pump, the CF end of the two-position three-way reversing valve is connected to the lifting cylinder oil circuit and the angle cylinder oil circuit, the EF end of the two-position three-way reversing valve is connected to the steering cylinder oil circuit, and the control end of the two-position three-way reversing valve is connected to the oil tank through the cylinder hydraulic pump overflow valve.

3. The hydraulic system of a deep tillage pulverizing and scarifying machine according to claim 2 is characterized in that: The lifting cylinder oil circuit includes a lifting three-position five-way solenoid valve, a lifting one-way valve, a lifting first hydraulically controlled one-way valve, a lifting second hydraulically controlled one-way valve and a lifting cylinder. The CF end of the two-position three-way reversing valve is connected to the E1P end of the lifting three-position five-way solenoid valve. A lifting one-way valve is arranged between the CF end of the two-position three-way reversing valve and the E1P end of the lifting three-position five-way solenoid valve. The E1A end of the lifting three-position five-way solenoid valve is connected to one end of the lifting first hydraulically controlled one-way valve, and the other end of the lifting first hydraulically controlled one-way valve is connected to one end of the lifting cylinder; the E1B end of the lifting three-position five-way solenoid valve is connected to one end of the lifting second hydraulically controlled one-way valve, and the other end of the lifting second hydraulically controlled one-way valve is connected to the other end of the lifting cylinder, and the E1T end of the lifting three-position five-way solenoid valve is connected to the oil tank.

4. The hydraulic system of a deep tillage pulverizing and scarifying machine according to claim 2, characterized in that: The angle cylinder oil circuit includes an angle three-position five-way solenoid valve, an angle check valve, a first angle hydraulically controlled one-way valve, a second angle hydraulically controlled one-way valve and a lifting cylinder. The CF end of the two-position three-way reversing valve is connected to the E2P end of the angle three-position five-way solenoid valve. A lifting one-way valve is arranged between the CF end of the two-position three-way reversing valve and the E2P end of the angle three-position five-way solenoid valve. The E2A end of the angle three-position five-way solenoid valve is connected to one end of the first angle hydraulically controlled one-way valve, and the other end of the first angle hydraulically controlled one-way valve is connected to one end of the angle cylinder; the E2B end of the angle three-position five-way solenoid valve is connected to one end of the second angle hydraulically controlled one-way valve, and the other end of the second angle hydraulically controlled one-way valve is connected to the other end of the angle cylinder, and the E1T end of the angle three-position five-way solenoid valve is connected to the oil tank.

5. The hydraulic system of a deep tillage pulverizing and scarifying machine according to claim 3 or 4, characterized in that: A lifting angle control oil circuit is also provided between the cylinder hydraulic pump oil circuit and the angle cylinder oil circuit and the lifting cylinder oil circuit, and the lifting angle control oil circuit includes a lifting angle control first relief valve, a lifting angle filter, a lifting angle second relief valve, a lifting angle third relief valve and a lifting angle fourth relief valve, the CF end of the two-position three-way reversing valve is connected to one end of the lifting angle filter, the other end of the lifting angle filter is connected to one end of the first lifting angle relief valve, the other end of the first lifting angle relief valve is connected to the oil tank, and the CF end of the two-position three-way reversing valve is also connected to one end of the second lifting angle relief valve. End is connected, the other end of the lifting angle second relief valve is connected to the control end of the lifting three-position five-way solenoid valve and the control end of the corner three-position five-way solenoid valve, one end of the lifting angle third relief valve is connected between the CF end of the two-position three-way reversing valve and one end of the lifting angle second relief valve, and the other end of the lifting angle third relief valve is connected to the oil tank; one end of the lifting angle fourth relief valve is connected between the lifting angle second relief valve and the control end of the lifting three-position five-way solenoid valve and the control end of the corner three-position five-way solenoid valve, and the other end of the lifting angle fourth relief valve is connected to the oil tank.

6. The hydraulic system of a deep tillage pulverizing and scarifying machine according to claim 2, characterized in that: The steering cylinder oil circuit includes a circulating oil circuit, a steering cylinder, a steering oil drain overflow valve and a steering oil inlet check valve. The EF end of the two-position three-way reversing valve is connected to one end of the steering oil inlet check valve, and the other end of the steering oil inlet check valve is connected to the circulating oil circuit. One end of the steering oil inlet check valve is also connected to one end of the steering oil drain overflow valve, and the other end of the steering oil drain overflow valve is connected to the circulating oil circuit, and the circulating oil circuit is connected to the steering cylinder; the steering cylinder is provided with a first steering cylinder and a second steering cylinder, and the circulating oil circuit includes a steering regulating valve and a steady flow oil circuit. The OP end of the steering regulating valve is connected to the other end of the steering oil inlet check valve, the OT end of the steering regulating valve is connected to the other end of the steering oil drain overflow valve and is connected to the oil tank, the OR end of the steering regulating valve is connected to one end of the first steering cylinder and the other end of the second steering cylinder, and the OL end of the steering regulating valve is connected to one end of the second steering cylinder and the other end of the first steering cylinder; a steady flow oil circuit is provided between the OR end and the OL end of the steering regulating valve.

7. The hydraulic system of a deep tillage pulverizing and scarifying machine according to claim 6, characterized in that: The steady flow oil circuit includes a first steering relief valve, a second steering relief valve, a first steering check valve and a second steering check valve, one end of the first steering relief valve is connected to the OR end of the steering regulating valve, the other end of the first steering relief valve is connected to one end of the second steering relief valve, the other end of the second steering relief valve is connected to the OL end of the steering regulating valve, the other end of the first steering relief valve and one end of the second steering relief valve are also connected to the oil tank, one end of the first steering check valve is connected to the OR end of the steering regulating valve, the other end of the first steering check valve is connected to one end of the second steering check valve, the other end of the second steering check valve is connected to the OL end of the steering regulating valve, and the first steering check valve and the second steering check valve are also connected to the oil tank.

8. The hydraulic system of a deep tillage pulverizing and scarifying machine according to claim 2, characterized in that: One end of the cylinder hydraulic pump connected to the oil tank is connected to a fan motor oil circuit, and the fan motor oil circuit includes a fan motor hydraulic pump, a fan motor and a fan motor overflow valve. One end of the fan motor hydraulic pump is connected to the oil tank, and the other end of the fan motor hydraulic pump is connected to one end of the fan motor, and the other end of the fan motor is connected to the oil tank. A fan motor overflow valve is provided between the two ends of the fan motor, and one end of the fan motor overflow valve is connected to one end of the fan motor connected to the fan motor hydraulic pump, and the other end of the fan motor overflow valve is connected to one end of the fan motor connected to the oil tank.

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