Hydraulic control system and working machine

Abstract

The invention belongs to the technical field of engineering machinery and provides a hydraulic control system and an operation machine.The hydraulic control system comprises an auxiliary execution module, an electric driving unit and an engine driving unit, and the electric driving unit comprises an electric pumping module and a first reversing valve set; the first reversing valve set is connected between the auxiliary execution module and the electric pumping module and used for controlling the oil inlet and outlet direction of the auxiliary execution module, and the engine driving unit comprises an engine pumping module and a second reversing valve set. The second reversing valve set is connected between the auxiliary execution module and the engine pumping module and used for controlling connection or disconnection between the engine pumping module and the auxiliary execution module. The two sets of power modules are arranged, the shutdown operation of the auxiliary execution module can be achieved, the starting operation of the auxiliary execution module can also be achieved, therefore, the reference scene is greatly enriched, and the starting frequency of the engine is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering machinery, and in particular relates to a hydraulic control system and an operating machine. Background Art

[0002] According to industry experience, large-scale construction machinery is generally equipped with auxiliary execution modules, such as a folding ladder module for assisting operators to climb the equipment, and a filling module for centrally filling fuel, hydraulic oil, and gear oil for auxiliary equipment.

[0003] Most of the existing auxiliary execution modules are based on the hydraulic system control driven by the equipment engine, that is, the auxiliary execution module can only perform auxiliary operations normally after the equipment engine is started. This control mode will greatly limit the application scenarios of the equipment. For example, in some cases, when the equipment fuel is consumed and the engine cannot be started, the operator can only manually add fuel to the fuel tank of the equipment because the filling module cannot work, which is very troublesome; or when the operator needs to climb the equipment without working, he needs to start the engine first, and then control the folding ladder to unfold before climbing to the equipment. This control method will increase the frequency of engine starting, which not only affects the life of the engine, but also increases energy consumption. Summary of the invention

[0004] In view of the above-mentioned defects or shortcomings, the present invention provides a hydraulic control system and a working machine, aiming to solve the technical problem that the auxiliary execution module in the existing engineering machinery needs to start the engine before it can work, resulting in limited application scenarios of the equipment.

[0005] To achieve the above-mentioned objectives, the present invention provides a hydraulic control system, which includes an auxiliary execution module, an electric drive unit and an engine drive unit. The electric drive unit includes an electric pumping module and a first reversing valve group. The first reversing valve group is connected between the auxiliary execution module and the electric pumping module and is used to control the oil inlet and outlet direction of the auxiliary execution module. The engine drive unit includes an engine pumping module and a second reversing valve group. The second reversing valve group is connected between the auxiliary execution module and the engine pumping module and is used to control the conduction or cutoff between the engine pumping module and the auxiliary execution module.

[0006] In an embodiment of the present invention, the auxiliary execution module includes an actuator body, a first working oil circuit and a second working oil circuit of the actuator body, one of the first working oil circuit and the second working oil circuit is a pressure-bearing oil circuit when the actuator body stops moving, and the second reversing valve group includes a second reversing valve body, the inlet and outlet oil port sides of the second reversing valve body are connected to the output oil port of the engine pumping module, and the working oil port side of the second reversing valve body is connected to the pressure-bearing oil circuit, and the second reversing valve body is used to control the conduction or cutoff between the pressure-bearing oil circuit and the output oil port of the engine pumping module.

[0007] In an embodiment of the present invention, the second reversing valve group also includes a first one-way valve, which is arranged between the working oil port side of the second reversing valve body and the actuator body. The first one-way valve is configured to be turned on when the hydraulic oil flows from the second reversing valve body to the actuator body and to be turned off in the reverse direction.

[0008] In an embodiment of the present invention, the first reversing valve group includes a first reversing valve body, the inlet and outlet oil port sides of the first reversing valve body are connected to the output oil port of the electric pumping module, the working oil port side of the first reversing valve body is connected to the first working oil circuit and the second working oil circuit, and the first reversing valve body is used to selectively guide the hydraulic oil output by the electric pumping module to one of the first working oil circuit and the second working oil circuit, and to return oil to the other one.

[0009] In an embodiment of the present invention, one of the first working oil circuit and the second working oil circuit is a pressure-bearing oil circuit, and the other is a non-pressure-bearing oil circuit. A hydraulic lock is provided between the working oil port side of the first reversing valve body and the pressure-bearing oil circuit. The hydraulic lock is configured as follows: when the non-pressure-bearing oil circuit is a low-pressure oil circuit, one-way communication is provided from the working oil port side of the first reversing valve body to the pressure-bearing oil circuit; when the non-pressure oil circuit is a pressure oil circuit, two-way communication is provided between the working oil port side of the first reversing valve body and the pressure-bearing oil circuit.

[0010] In an embodiment of the present invention, the oil inlet and outlet sides of the first reversing valve body are also connected to the oil return circuit, and the first reversing valve body is also provided with a mid-position oil return valve position, and the mid-position oil return valve position is configured as follows: the first reversing valve body connects the working oil ports of the first working oil circuit and the second working oil circuit and is connected to the oil return circuit.

[0011] In an embodiment of the present invention, the hydraulic control system also includes a manual control valve group, which is arranged between the auxiliary execution module and the oil return circuit. The manual control valve group is used to manually control the pressure relief and oil return of the auxiliary execution module and the rate of pressure relief and oil return. The manual control valve group includes a throttle valve with adjustable opening.

[0012] In an embodiment of the present invention, the hydraulic control system also includes an external output unit, which includes a shuttle valve pressure valve group, the first pressure port of the shuttle valve pressure valve group is connected to the output oil port of the electric pumping module, the second pressure port of the shuttle valve pressure valve group is connected to the output oil port of the engine pumping module, and the shuttle valve pressure valve group is also provided with an output interface.

[0013] In an embodiment of the present invention, the hydraulic control system further comprises a pilot oil output circuit, one end of which is connected to an output oil port of the engine pumping module.

[0014] To achieve the above object, the present invention further provides a working machine, wherein the working machine includes the hydraulic control system described above.

[0015] Through the above technical solution, the hydraulic control system provided by the embodiment of the present invention has the following beneficial effects:

[0016] When the system is in a shutdown state and needs to perform auxiliary operations such as centralized oil filling or folding ladders, the operator can control the electric pumping module to open, and control the first reversing valve group to switch to the appropriate valve position, and supply oil to the auxiliary execution module through the electric pumping module, so that the auxiliary execution module performs the corresponding action and realizes the electric drive of the auxiliary execution module. When the engine is started, the engine pumping module is running, and the second reversing valve group is controlled to switch to the appropriate valve position, so that the engine pumping module supplies oil to the auxiliary execution module to realize the engine drive of the auxiliary execution module. In summary, the hydraulic control system in the present invention can provide the auxiliary execution module with two working modes of electric drive and engine drive by setting two sets of power modules, which can realize the shutdown operation of the auxiliary execution module and the start-up operation of the auxiliary execution module, thereby greatly enriching the reference scenarios and reducing the starting frequency of the engine.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 is a connection principle diagram of a hydraulic control system according to an embodiment of the present invention;

[0020] Figure 2 is a control principle diagram of the lifting of the folding ladder module according to an embodiment of the present invention;

[0021] Figure 3 4 is a control principle diagram of the oil replenishment process of the auxiliary execution module according to an embodiment of the present invention.

[0022] Description of Reference Numerals

[0023] 1. Auxiliary execution module; 11. Execution element body; 12. First working oil circuit; 13. Second working oil circuit; 14. Pressure chamber.

[0024] 2. Electric drive unit; 21. Electric pumping module; 22. First reversing valve group; 221. First reversing valve body; 222. Hydraulic lock.

[0025] 3. Engine drive unit; 31. Engine pumping module; 32. Second reversing valve group; 321. Second reversing valve body; 322. Check valve.

[0026] 4. External output unit; 41. Shuttle valve pressure taking valve group; a. First pressure taking port; b. Second pressure taking port; c. Output interface.

[0027] 5. Pilot oil output circuit.

[0028] 6. Manual control valve group; 61. Valve group inlet side; 62. Valve group outlet side. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] The hydraulic control system of the present invention will be described below with reference to the accompanying drawings.

[0031] The present invention provides a hydraulic control system, such as Figure 1 As shown, the hydraulic control system includes an auxiliary execution module 1 , an electric drive unit 2 and an engine drive unit 3 .

[0032] The auxiliary execution module 1 includes a folding ladder module and a centralized filling module.

[0033] The electric drive unit 2 includes an electric pumping module 21 and a first reversing valve group 22 . The first reversing valve group 22 is connected between the auxiliary execution module 1 and the electric pumping module 21 and is used to control the oil inlet and outlet directions of the auxiliary execution module 1 .

[0034] The engine driving unit 3 includes an engine pumping module 31 and a second reversing valve group 32 . The second reversing valve group 32 is connected between the auxiliary execution module 1 and the engine pumping module 31 and is used to control the conduction or cutoff between the engine pumping module 31 and the auxiliary execution module 1 .

[0035] When the system is in a shutdown state and needs to perform auxiliary operations such as centralized oil filling or folding ladders, the operator can control the electric pumping module 21 to open, and control the first reversing valve group 22 to switch to a suitable valve position, and supply oil to the auxiliary execution module 1 through the electric pumping module 21, so that the auxiliary execution module 1 performs the corresponding action and realizes the electric drive of the auxiliary execution module 1. When the engine is started, the engine pumping module 31 is in operation, and the second reversing valve group 32 is controlled to switch to a suitable valve position, so that the engine pumping module 31 supplies oil to the auxiliary execution module 1, and the engine drive of the auxiliary execution module 1 is realized. In summary, the hydraulic control system in the present invention can provide the auxiliary execution module 1 with two working modes of electric drive and engine drive by setting two sets of power modules, which can realize the shutdown operation of the auxiliary execution module 1 and the start-up operation of the auxiliary execution module 1, thereby greatly enriching the reference scene and reducing the engine start-up frequency.

[0036] It is understandable that in some scenarios, the electric pumping module 21 and the engine pumping module 31 can jointly drive the auxiliary execution module 1 to act.

[0037] In an embodiment of the present invention, the electric pumping module 21 includes a battery for providing energy, a motor electrically connected to the battery, and an electric pump body drivingly connected to the motor. The engine pumping module 31 includes an engine pump body drivingly connected to the engine.

[0038] In an embodiment of the present invention, the hydraulic control system further comprises a controller, and the controller is used to control the electric drive unit 2 and the engine drive unit 3 respectively when the auxiliary execution module 1 is shut down and started.

[0039] The auxiliary execution module 1 is used as the filling module ( Figure 1 Take the left cylinder in the middle as an example. Figure 1 As shown, when the engine is in a stopped state and the controller receives an oil filling instruction, the controller controls the motor to start and controls the first reversing valve group 22 to switch to the corresponding valve position so that the hydraulic oil output by the electric pump body flows to the filling module. At the same time, in order to avoid mutual influence between the electric drive unit 2 and the engine drive unit 3, the controller will also control the second reversing valve group 32 to remain in a closed state after receiving the instruction.

[0040] When the engine is in operation and after receiving an oil filling instruction, the controller controls the second reversing valve group 32 to switch to a corresponding valve position so that the hydraulic oil output by the engine pump body flows to the filling module.

[0041] The auxiliary execution module 1 is a folding ladder module ( Figure 1 Take the oil cylinder on the right side of the middle as an example. Figure 1 and Figure 2 As shown, when the engine is in a stopped state, after receiving the folding ladder ascending command / descending command, the controller will control the motor to start, and control the first reversing valve group 22 to switch to the corresponding valve position, so that the hydraulic oil output by the electric pump body flows to the folding ladder cylinder in the folding ladder module. When the folding ladder cylinder moves to the right position, the motor is controlled to stop, and the first reversing valve group 22 is controlled to switch to the corresponding valve position. Similarly, when the engine is in a running state, the controller will control the engine pump body to supply oil to the folding ladder module.

[0042] In an embodiment of the present invention, after the engine is started, the controller can control the motor to stop, so as to reduce the operating frequency and working time of the battery and the engine pump body, and extend the service life of the electric pumping module 21.

[0043] In an embodiment of the present invention, the auxiliary execution module 1 includes an actuator body 11, a first working oil circuit 12 and a second working oil circuit 13 of the actuator body 11, one of the first working oil circuit 12 and the second working oil circuit 13 is a pressure-bearing oil circuit when the actuator body 11 stops moving, and the second reversing valve group 32 includes a second reversing valve body 321, the inlet and outlet oil port sides of the second reversing valve body 321 are connected to the output oil port of the engine pumping module 31, and the working oil port side of the second reversing valve body 321 is connected to the pressure-bearing oil circuit, and the second reversing valve body 321 is used to control the conduction or cutoff between the pressure-bearing oil circuit and the output oil port of the engine pumping module 31.

[0044] After the auxiliary execution module 1 is in place, it may fall back due to external impact and leakage from the valve group and the oil cylinder. Some existing solutions use mechanical locking to prevent the auxiliary execution module 1 from falling back, but this method has a high failure rate. Or some solutions rely entirely on personnel's experience, observation and judgment, which has great safety risks.

[0045] To this end, after the engine is started, the hydraulic control system of the present invention controls the engine pumping module 31 to replenish oil to the pressure-bearing side of the actuator body 11 in real time, which can completely solve the falling problem caused by internal leakage of the auxiliary execution module 1 and the reversing valve group, and ensure the safe operation of the auxiliary execution module 1. Specifically, Figure 3 As shown, the control process of the oil replenishment is as follows: after the engine is started and the auxiliary execution module 1 moves to the extreme position and is detected by the travel switch, the controller will output a control signal of a preset duration to the second reversing valve group 32, so that the engine pumping module 31 continues to replenish oil to the auxiliary execution module 1 for a preset duration, thereby achieving stable locking of the auxiliary execution module 1 at the current extreme position. By replenishing oil to the auxiliary execution module 1 by the engine, the startup frequency of the electric pumping module 21 can be further reduced.

[0046] In the embodiment of the present invention, the second reversing valve body 321 can also be used to control the oil inlet and outlet directions of the auxiliary execution module 1 like the first reversing valve body 221 .

[0047] like Figure 1 As shown, in the embodiment of the present invention, the actuator body 11 may be an oil cylinder, and the pressure oil circuit refers to the oil circuit connected to the working chamber on the pressure side when the oil cylinder stops moving. For example, taking the actuator body 11 as a folding ladder driving cylinder as an example, when the folding ladder stops moving, the rodless chamber of the folding ladder driving cylinder needs to bear the pressure of the folding ladder's own weight, so the rodless chamber of the folding ladder driving cylinder is the pressure chamber 14, and the working oil circuit connected to the rodless chamber is the pressure chamber.

[0048] like Figure 1As shown, in the embodiment of the present invention, the second reversing valve group 32 further includes a first one-way valve 322, which is arranged between the working oil port side of the second reversing valve body 321 and the actuator body 11, and the first one-way valve 322 is configured to be conductive when the hydraulic oil flows from the second reversing valve body 321 to the actuator body 11 and to be cut off in the reverse direction. By providing the first one-way valve 322, it is possible to prevent the hydraulic oil in the pressure oil circuit from flowing back and causing the auxiliary execution module 1 to fall back.

[0049] like Figure 1 As shown, in an embodiment of the present invention, the first reversing valve group 22 includes a first reversing valve body 221, the inlet and outlet oil port sides of the first reversing valve body 221 are connected to the output oil port of the electric pumping module 21, and the working oil port side of the first reversing valve body 221 is connected to the first working oil circuit 12 and the second working oil circuit 13. The first reversing valve body 221 is used to selectively guide the hydraulic oil output by the electric pumping module 21 to one of the first working oil circuit 12 and the second working oil circuit 13, and to return oil to the other one.

[0050] Continuing with the example of the actuator body 11 being a folding ladder driving cylinder, the first reversing valve body 221 is provided with a cylinder extension valve position ( Figure 1 The left valve position in the middle), used to guide the hydraulic oil output by the electric pumping module 21 to the cylinder retraction valve position ( Figure 1 In the right valve position in the oil cylinder, the rod chamber of the oil cylinder driving the folding ladder returns oil through the first reversing valve body 221 when the oil cylinder is in the extended valve position, and the rodless chamber of the oil cylinder driving the folding ladder returns oil through the first reversing valve body 221 when the oil cylinder is in the retracted valve position. The extension and retraction of the oil cylinder correspond to the rising and unfolding and the descending and folding operations of the folding ladder, respectively. By controlling the reversing of the first reversing valve body 221, the folding and releasing control of the folding ladder can be realized.

[0051] like Figure 1 As shown, in an embodiment of the present invention, one of the first working oil circuit 12 and the second working oil circuit 13 is a pressure-bearing oil circuit, and the other is a non-pressure-bearing oil circuit. A hydraulic lock 222 is provided between the working oil port side of the first reversing valve body 221 and the pressure-bearing oil circuit. The pilot oil circuit of the hydraulic lock 222 is connected to the non-pressure-bearing oil circuit. The hydraulic lock 222 is configured as follows: when the non-pressure oil circuit is at low pressure, one-way conduction is provided from the working oil port side of the first reversing valve body 221 to the pressure-bearing oil circuit; when the non-pressure oil circuit is at high pressure, two-way conduction is provided between the working oil port side of the first reversing valve body 221 and the pressure-bearing oil circuit.

[0052] Take the first working oil circuit 12 connected to the rodless chamber of the oil cylinder and as a pressure-bearing oil circuit as an example. At this time, the second working oil circuit 13 is connected to the rod chamber of the oil cylinder and is a non-pressure-bearing oil circuit. The hydraulic lock 222 is provided with a pilot oil circuit connected to the second working oil circuit 13. When the first reversing valve body 221 is in the oil cylinder extension valve position, the second working oil circuit 13 is depressurized, the pilot oil circuit is low pressure, and the hydraulic lock 222 is in a unidirectional conduction state. The unidirectional conduction hydraulic lock 222 can achieve the reverse cutoff of the first working oil circuit 12 when the motor stops, thereby locking the oil cylinder. When the first reversing valve body 221 is in the oil cylinder retraction valve position, the second working oil circuit 13 is fed with oil, the pilot oil circuit is high pressure, and the hydraulic lock 222 is bidirectionally conducted. At this time, the hydraulic oil in the rodless chamber can be smoothly returned through the first working oil circuit 12 to ensure the normal retraction of the oil cylinder.

[0053] In an embodiment of the present invention, the oil inlet and outlet sides of the first reversing valve body 221 are also connected to the oil return circuit, and the first reversing valve body 221 is also provided with a mid-position oil return valve position, and the mid-position oil return valve position is configured as follows: the working oil port of the first reversing valve body 221 connected to the first working oil circuit 12 and the second working oil circuit 13 is connected to the oil return circuit.

[0054] When the electric pumping module 21 drives the auxiliary execution module 1 to complete the action, the controller will control the electric pumping module 21 to shut down, and will also control the first reversing valve body 221 to switch to the middle oil return valve position. At this time, the second working oil circuit 13 is depressurized, and under the action of the hydraulic lock 222, the cylinder is locked.

[0055] In an embodiment of the present invention, when the hydraulic lock 222 is in bidirectional conduction, it is preferably throttling bidirectional conduction to control the retraction rate of the cylinder.

[0056] like Figure 1 As shown, in an embodiment of the present invention, the hydraulic control system also includes a manual control valve group 6, which is arranged between the auxiliary execution module 1 and the oil return circuit. The manual control valve group 6 is used to manually control the pressure relief and oil return of the auxiliary execution module 1 and the rate of pressure relief and oil return. The manual control valve group 6 includes a throttle valve with adjustable opening.

[0057] Specifically, the manual control valve group 6 is provided with a valve group inlet side 61 connected to the first working oil circuit 12 and the second working oil circuit 13 respectively and a valve group outlet side 62 connected to the return oil circuit. The manual control valve group 6 also includes a throttle valve arranged between the valve group inlet side 61 and the valve group outlet side 62. The opening of the throttle valve can be adjusted between 0-100%. When the auxiliary execution module 1 is working normally, the throttle valve is fully closed. When the auxiliary execution module 1 needs emergency operation, the throttle valves in the manual control valve group 6 that are respectively connected to the first working oil circuit 12 and the second working oil circuit 13 are controlled to open, so that the oil cylinder is depressurized through the corresponding throttle valve. By adjusting the opening of the throttle valve, the depressurization rate of the oil cylinder can be controlled.

[0058] like Figure 1 As shown, in the embodiment of the present invention, the manual control valve group 6 further includes a second one-way valve 322 disposed between the valve group inlet side 61 and the valve group outlet side 62, and the second one-way valve 322 is configured to be conductive when the hydraulic oil flows from the valve group outlet side 62 to the valve group inlet side 61 and to be blocked in the reverse direction. By providing the second one-way valve 322, one-way oil replenishment to the first working oil circuit 12 and the second working oil circuit 13 can be achieved.

[0059] In the embodiment of the present invention, the hydraulic control system further includes an external output unit 4, which includes a shuttle valve pressure valve group 41. The first pressure port a of the shuttle valve pressure valve group 41 is connected to the output oil port of the electric pumping module 21, and the second pressure port b of the shuttle valve pressure valve group 41 is connected to the output oil port of the engine pumping module 31. The shuttle valve pressure valve group 41 is also provided with an output interface c. The output interface c is used for detachably connecting a quick-change connector. Through the pressure of the shuttle valve pressure valve group 41, the external output function of the system shutdown and startup state can be realized.

[0060] In the embodiment of the present invention, the hydraulic control system further includes a pilot oil output circuit 5, one end of which is connected to the output oil port of the engine pumping module 31. That is, the auxiliary execution module 1 can be driven by the original pilot pump of the system without adding an additional pump, thereby reducing the system cost.

[0061] To achieve the above object, the present invention further provides a working machine, wherein the working machine includes the hydraulic control system described above. The working machine may be a working vehicle such as an excavator or a crane. Since the working machine adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought by the above embodiments, which will not be repeated here.

[0062] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hydraulic control system, characterized in that: The hydraulic control system comprises: Auxiliary execution module (1); An electric drive unit (2), comprising an electric pumping module (21) and a first reversing valve group (22), wherein the first reversing valve group (22) is connected between the auxiliary execution module (1) and the electric pumping module (21) and is used to control the oil inlet and outlet directions of the auxiliary execution module (1); The engine drive unit (3) comprises an engine pumping module (31) and a second reversing valve group (32), wherein the second reversing valve group (32) is connected between the auxiliary execution module (1) and the engine pumping module (31) and is used to control the conduction or cutoff between the engine pumping module (31) and the auxiliary execution module (1).

2. The hydraulic control system according to claim 1, characterized in that: The auxiliary execution module (1) comprises an actuator body (11), a first working oil circuit (12) and a second working oil circuit (13) of the actuator body (11); one of the first working oil circuit (12) and the second working oil circuit (13) is a pressure-bearing oil circuit when the actuator body (11) stops moving; the second reversing valve group (32) comprises a second reversing valve body (321); the oil inlet and outlet sides of the second reversing valve body (321) are connected to the oil output port of the engine pumping module (31); the working oil port side of the second reversing valve body (321) is connected to the pressure-bearing oil circuit; the second reversing valve body (321) is used to control the conduction or cutoff between the pressure-bearing oil circuit and the oil output port of the engine pumping module (31).

3. The hydraulic control system according to claim 2, characterized in that: The second reversing valve group (32) further includes a first one-way valve (322), which is arranged between the working oil port side of the second reversing valve body (321) and the actuator body (11), and the first one-way valve (322) is configured to be conductive when hydraulic oil flows from the second reversing valve body (321) to the actuator body (11) and to be blocked in the reverse direction.

4. The hydraulic control system according to claim 2, characterized in that: The first reversing valve group (22) comprises a first reversing valve body (221), the oil inlet and outlet sides of the first reversing valve body (221) are connected to the oil output port of the electric pumping module (21), the working oil port side of the first reversing valve body (221) is connected to the first working oil circuit (12) and the second working oil circuit (13), and the first reversing valve body (221) is used to selectively guide the hydraulic oil output by the electric pumping module (21) to one of the first working oil circuit (12) and the second working oil circuit (13), and to return oil to the other one.

5. The hydraulic control system according to claim 4, characterized in that: One of the first working oil circuit (12) and the second working oil circuit (13) is the pressure-bearing oil circuit, and the other is the non-pressure-bearing oil circuit. A hydraulic lock (222) is provided between the working oil port side of the first reversing valve body (221) and the pressure-bearing oil circuit. The hydraulic lock (222) is configured such that when the non-pressure-bearing oil circuit is a low-pressure oil circuit, one-way communication is provided from the working oil port side of the first reversing valve body (221) to the pressure-bearing oil circuit. When the non-pressure-bearing oil circuit is a pressure oil circuit, two-way communication is provided between the working oil port side of the first reversing valve body (221) and the pressure-bearing oil circuit.

6. The hydraulic control system according to claim 5, characterized in that: The oil inlet and outlet sides of the first reversing valve body (221) are also connected to the oil return circuit. The first reversing valve body (221) is also provided with a middle oil return valve position. The middle oil return valve position is configured such that the first working oil circuit (12) and the second working oil circuit (13) are respectively connected to the oil return circuit.

7. The hydraulic control system according to any one of claims 1 to 6, characterized in that: The hydraulic control system further comprises a manual control valve group (6), wherein the manual control valve group (6) is arranged between the auxiliary execution module (1) and the oil return circuit, and the manual control valve group (6) is used to manually control the pressure relief oil return and the pressure relief oil return rate of the auxiliary execution module (1), and the manual control valve group (6) comprises a throttle valve with adjustable opening.

8. The hydraulic control system according to any one of claims 1 to 6, characterized in that: The hydraulic control system further comprises an external output unit (4), the external output unit (4) comprising a shuttle valve pressure taking valve group (41), a first pressure taking port (a) of the shuttle valve pressure taking valve group (41) being in communication with an output oil port of the electric pumping module (21), a second pressure taking port (b) of the shuttle valve pressure taking valve group (41) being in communication with an output oil port of the engine pumping module (31), and the shuttle valve pressure taking valve group (41) being further provided with an output interface (c).

9. The hydraulic control system according to any one of claims 1 to 6, characterized in that: The hydraulic control system further comprises a pilot oil output circuit (5), one end of which is in communication with an output oil port of the engine pumping module (31).

10. A working machine, characterized in that: Comprising a hydraulic control system according to any one of claims 1 to 9.

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