Combined control device based on green media

Abstract

The present invention discloses a combined control device based on green media, including an electromagnetic reversing valve, a hydraulically controlled reversing valve, a pilot control valve group and a servomotor, wherein the oil inlet of the electromagnetic reversing valve is connected to a control oil source, and the oil outlet control port of the electromagnetic reversing valve is connected to the oil inlet control port of the hydraulically controlled reversing valve; the water inlet of the hydraulically controlled reversing valve is connected to a constant pressure control water source, and the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve are respectively connected to the working chamber control ports of the first hydraulically controlled two-way valve and the second hydraulically controlled two-way valve; the working chamber water inlet interface of the first hydraulically controlled two-way valve is connected to a pressure water source, the working chamber water outlet interface of the first hydraulically controlled two-way valve is respectively connected to the opening chamber interface of the second hydraulically controlled two-way valve and the servomotor, and the working chamber water outlet interface of the second hydraulically controlled two-way valve is connected to a water return port. The present invention solves the problems of medium failure caused by mutual leakage when the oil medium is coupled in the existing hydraulic control system, and serious pollution caused by leakage into the environment.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic systems, and in particular to a combined control device based on green media, which mainly utilizes water media to realize valve control. Background Art

[0002] Hydraulic transmission uses liquid working medium to transfer and control energy. There are many types of working medium, mainly including mineral oil-based hydraulic oil, water-based flame-retardant hydraulic fluid, anhydrous synthetic fluid, natural fresh water or seawater, etc. These media have huge differences in characteristics and different requirements for hydraulic components. Mineral oil is an ideal hydraulic transmission working medium because it has excellent comprehensive physical and chemical properties such as high viscosity, good lubrication, rust prevention, and good compatibility. Therefore, it is widely used and occupies a dominant position in hydraulic systems.

[0003] After more than 100 years of development from the beginning of the 20th century to the present, mineral oil hydraulic technology has become relatively mature, with a complete industrial chain of hydraulic systems and components, a high degree of standardization, reliable performance, and a relatively reasonable cost. However, once a mineral oil hydraulic system leaks, it will cause waste and serious environmental pollution, and it is not easy to repair. As people's environmental protection concept becomes stronger and stronger, in some occasions with high environmental protection requirements, leakage is not easy to control. Water medium has the advantages of cleanliness, pollution-free, safety, low cost, and high recycling rate. It can solve the pollution problems caused by mineral oil leakage and discharge. More and more applications have been made, and it is a very ideal "green working medium". However, in the current domestic water pressure system, hydraulic components are not perfect, the structural forms are different, and the price is expensive. In particular, the switch control valves using water medium are almost all imported, but relying on imports has technical problems such as expensive imported parts, long purchase cycle, and difficult replacement of spare parts. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art and to provide a combined control device based on green media with a simple structure and convenient control. The present invention is mainly used in the hydraulic control system for the operation of the water inlet valve of a pumped storage power station, and solves the problem of medium failure caused by mutual leakage of oil media during coupling in the existing hydraulic control system and serious pollution caused by leakage into the environment.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A combined control device based on green medium, characterized in that: it includes an electromagnetic reversing valve, a hydraulic reversing valve, a pilot control valve group and a relay, the hydraulic reversing valve includes an oil inlet control port, a water inlet, a drain port, a first control water outlet and a second control water outlet; the electromagnetic reversing valve includes an oil inlet, an oil drain port and an oil outlet control port; the pilot control valve group includes a first hydraulically controlled two-way valve and a second hydraulically controlled two-way valve, the first hydraulically controlled two-way valve and the second hydraulically controlled two-way valve both include a constant pressure control chamber, a working chamber control port, a working chamber water inlet interface and a working chamber water outlet interface; the relay includes an opening chamber interface and a closing chamber interface;

[0007] Among them, the oil inlet of the electromagnetic reversing valve is connected to the control oil source, and the oil outlet control port of the electromagnetic reversing valve is connected to the oil inlet control port of the hydraulic control reversing valve; the water inlet of the hydraulic control reversing valve is connected to the constant pressure control water source, and the first control water outlet and the second control water outlet of the hydraulic control reversing valve are respectively connected to the working chamber control port of the first hydraulically controlled two-way valve and the working chamber control port of the second hydraulically controlled two-way valve; the working chamber water inlet interface of the first hydraulically controlled two-way valve is connected to the pressure water source, the working chamber water outlet interface of the first hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the second hydraulically controlled two-way valve and the open chamber interface of the relay, and the working chamber water outlet interface of the second hydraulically controlled two-way valve is connected to the return water port.

[0008] The pilot control valve group also includes a third hydraulically controlled two-way valve and a fourth hydraulically controlled two-way valve. The working chamber control port of the third hydraulically controlled two-way valve and the working chamber control port of the fourth hydraulically controlled two-way valve are respectively connected to the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. The working chamber water inlet interface of the third hydraulically controlled two-way valve is connected to the pressure water source. The working chamber water outlet interface of the third hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the fourth hydraulically controlled two-way valve and the closing chamber interface of the relay. The working chamber water outlet interface of the fourth hydraulically controlled two-way valve is connected to the return port.

[0009] The constant pressure control chambers in the pilot control valve group are all connected to a constant pressure control water source.

[0010] The constant pressure control chamber in the pilot control valve group is connected to the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve respectively.

[0011] A constant pressure spring is arranged in the constant pressure control chamber in the pilot control valve group, and the constant pressure control function of the constant pressure control chamber is realized by the constant pressure spring.

[0012] A pressure relay is arranged between the oil outlet control port of the electromagnetic reversing valve and the oil inlet control port of the hydraulic control reversing valve.

[0013] The first control water outlet and the second control water outlet of the hydraulically controlled reversing valve are also respectively connected to pressure measuring contacts for installing a pressure gauge.

[0014] The electromagnetic reversing valve is a double-coil valve or a single-coil valve.

[0015] The advantages of adopting the present invention are:

[0016] 1. The present invention adopts a combined control device consisting of an electromagnetic reversing valve, a hydraulic reversing valve, a pilot control valve group and a relay, which can use water medium to control the opening and closing of the valve, effectively solving the problem of medium failure caused by mutual leakage when coupling using oil medium in the existing hydraulic control system and serious pollution caused by leakage into the environment, and has better environmental protection.

[0017] 2. The present invention can be applied to a water pressure control system that requires high water pressure and a large flow rate. By using four hydraulically controlled two-way valves in different combinations of the main circuit and the control circuit, while satisfying the control of the servomotor switch, both the control circuit and the main circuit can be directly operated with water, thus avoiding oil-water mixing pollution caused by the leakage of water in the main circuit while the control uses oil.

[0018] 3. The present invention can also be applied to hydraulic control systems of oil media. It has complete functions, strong practicality and versatility, and is worthy of promotion in high-water-pressure and high-flow hydraulic control systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the principle of Example 1;

[0020] Figure 2 This is a schematic diagram of the principle of Example 2;

[0021] Figure 3 This is a schematic diagram of the principle of Example 3;

[0022] Figure 4 This is a schematic diagram of the principle of Example 4. DETAILED DESCRIPTION

[0023] Example 1

[0024] This embodiment discloses a combined control device based on green media, including an electromagnetic reversing valve, a hydraulically controlled reversing valve, a pilot control valve group, a relay, a pressure relay and two pressure measuring contacts, wherein the hydraulically controlled reversing valve includes an oil inlet control port, a water inlet, a drain port, a first control water outlet and a second control water outlet; the electromagnetic reversing valve can adopt an electromagnetic reversing valve as a double-coil valve or a single-coil valve, which includes an oil inlet, an oil drain port and an oil outlet control port; the pilot control valve group adopts a hydraulically controlled two-way valve controlled by a double chamber* (control chamber and working chamber), which includes a first hydraulically controlled two-way valve and a second hydraulically controlled two-way valve, and the first hydraulically controlled two-way valve and the second hydraulically controlled two-way valve both include a constant pressure control chamber, a working chamber control port, a working chamber water inlet interface and a working chamber water outlet interface; the relay includes an open chamber interface and a closed chamber interface. Among them, the structure, position and connection relationship of each component are as follows:

[0025] The oil inlet of the solenoid valve is communicated with the control oil source, and the oil outlet control port of the solenoid reversing valve is connected with the oil inlet control port of the hydraulic control reversing valve.

[0026] The water inlet of the hydraulically controlled reversing valve is connected to the constant pressure control water source, and the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve are respectively connected to the working chamber control port of the first hydraulically controlled two-way valve and the working chamber control port of the second hydraulically controlled two-way valve.

[0027] The working chamber water inlet interface of the first hydraulically controlled two-way valve is connected to the pressure water source, the working chamber water outlet interface of the first hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the second hydraulically controlled two-way valve and the open chamber interface of the relay, and the working chamber water outlet interface of the second hydraulically controlled two-way valve is connected to the return port.

[0028] The pressure relay is arranged between the oil outlet control port of the electromagnetic reversing valve and the oil inlet control port of the hydraulic control reversing valve, and is used to detect the pressure fluctuation between the electromagnetic reversing valve and the hydraulic control reversing valve, and then detect whether the hydraulic control reversing valve responds to the control of the electromagnetic reversing valve in time.

[0029] Two pressure measuring contacts are respectively arranged at the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. Pressure gauges are installed at the pressure measuring contacts to detect pressure fluctuations between the hydraulically controlled reversing valve and the pilot control valve group.

[0030] In this embodiment, the pilot control valve group is only connected to the open cavity interface of the servomotor, so it belongs to single cavity control. In actual control, the closed cavity interface of the servomotor can be connected to constant pressure water. In addition, the first hydraulically controlled two-way valve and the second hydraulically controlled two-way valve both include a constant pressure control cavity, which is used to keep the control cavity at a constant pressure. Specifically, the constant pressure control cavity can be controlled by Figure 1 The P port shown uses external constant pressure water to achieve constant pressure, etc. Figure 1 The principle of this embodiment is specifically described:

[0031] When the relay MV001 needs to be opened, the electromagnetic reversing valve EV001 is energized (if it is a double-coil valve, the a end is energized), so that the valve core of the electromagnetic reversing valve EV001 is in the left position, and the hydraulic oil in the control oil source P reaches the oil outlet control port B through the oil inlet port P of the electromagnetic reversing valve EV001, and then enters the control chamber through the oil inlet control port of the hydraulic control reversing valve HV001, so that the valve core of the hydraulic control reversing valve HV001 is in the left position under the action of the hydraulic pressure. After that, the first control water outlet A of the hydraulic control reversing valve HV001 is connected with the drain port T, and the working chamber control port X of the first hydraulic control two-way valve CV001 is drained through the first control water outlet A of the hydraulic control reversing valve HV001. When the pressure in the constant pressure control chamber in the first hydraulically controlled two-way valve CV001 is greater than the pressure in the working chamber, the valve core of the first hydraulically controlled two-way valve CV001 moves toward the working chamber under the action of constant pressure, cutting off the passage between the working chamber water inlet interface A and the working chamber water outlet interface B in the working chamber.

[0032] The water inlet P of the hydraulically controlled reversing valve HV001 is connected to the second control water outlet B, and the pressure water in the constant pressure control water source P enters the working chamber control port X of the second hydraulically controlled two-way valve CV002 through the water inlet P and the second control water outlet B of the hydraulically controlled reversing valve HV001 in turn. When the pressure of the working chamber in the second hydraulically controlled two-way valve CV002 is greater than the pressure of the constant pressure control chamber, the valve core of the second hydraulically controlled two-way valve CV002 moves toward the control chamber under the action of pressure, connecting the passage between the working chamber water inlet interface A and the working chamber water outlet interface B in the working chamber. At this time, the pressure water in the pressure water source P enters the open chamber interface of the relay MV001 through the working chamber water inlet interface A and the working chamber water outlet interface B of the second hydraulically controlled two-way valve CV002 in turn. As the pressure in the open chamber of the relay MV001 is greater than the pressure in the closed chamber, the relay MV001 realizes the opening operation. On the contrary, if the solenoid reversing valve EV001 is controlled to lose power (if it is a double-coil valve, the b end is energized), the closing operation of the relay MV001 can be achieved.

[0033] Example 2

[0034] This embodiment discloses a combined control device based on green media, including an electromagnetic reversing valve, a hydraulically controlled reversing valve, a pilot control valve group, a relay, a pressure relay and two pressure measuring contacts, wherein the hydraulically controlled reversing valve includes an oil inlet control port, a water inlet, a drain port, a first control water outlet and a second control water outlet; the electromagnetic reversing valve can adopt an electromagnetic reversing valve as a double-coil valve or a single-coil valve, which includes an oil inlet, an oil drain port and an oil outlet control port; the pilot control valve group adopts a hydraulically controlled two-way valve controlled by a double chamber* (control chamber and working chamber), which includes a first hydraulically controlled two-way valve and a second hydraulically controlled two-way valve, and the first hydraulically controlled two-way valve and the second hydraulically controlled two-way valve both include a constant pressure control chamber, a working chamber control port, a working chamber water inlet interface and a working chamber water outlet interface; the relay includes an open chamber interface and a closed chamber interface. Among them, the structure, position and connection relationship of each component are as follows:

[0035] The oil inlet of the solenoid valve is communicated with the control oil source, and the oil outlet control port of the solenoid reversing valve is connected with the oil inlet control port of the hydraulic control reversing valve.

[0036] The water inlet of the hydraulically controlled reversing valve is connected to the constant pressure control water source, and the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve are respectively connected to the working chamber control port of the first hydraulically controlled two-way valve and the working chamber control port of the second hydraulically controlled two-way valve.

[0037] The working chamber water inlet interface of the first hydraulically controlled two-way valve is connected to the pressure water source, the working chamber water outlet interface of the first hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the second hydraulically controlled two-way valve and the open chamber interface of the relay, and the working chamber water outlet interface of the second hydraulically controlled two-way valve is connected to the return port.

[0038] The pressure relay is arranged between the oil outlet control port of the electromagnetic reversing valve and the oil inlet control port of the hydraulic control reversing valve, and is used to detect the pressure fluctuation between the electromagnetic reversing valve and the hydraulic control reversing valve, and then detect whether the hydraulic control reversing valve responds to the control of the electromagnetic reversing valve in time.

[0039] Two pressure measuring contacts are respectively arranged at the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. Pressure gauges are installed at the pressure measuring contacts to detect pressure fluctuations between the hydraulically controlled reversing valve and the pilot control valve group.

[0040] In this embodiment, the pilot control valve group also includes a third hydraulically controlled two-way valve and a fourth hydraulically controlled two-way valve. The third hydraulically controlled two-way valve and the fourth hydraulically controlled two-way valve both include a constant pressure control chamber, a working chamber control port, a working chamber water inlet interface and a working chamber water outlet interface. The working chamber control port of the third hydraulically controlled two-way valve and the working chamber control port of the fourth hydraulically controlled two-way valve are respectively connected to the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. The working chamber water inlet interface of the third hydraulically controlled two-way valve is connected to a pressure water source. The working chamber water outlet interface of the third hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the fourth hydraulically controlled two-way valve and the closing chamber interface of the relay. The working chamber water outlet interface of the fourth hydraulically controlled two-way valve is connected to the return water port.

[0041] Furthermore, the constant pressure control chamber of each hydraulically controlled two-way valve in the pilot control valve group is connected to the constant pressure control water source, that is, the constant pressure control chambers of the first hydraulically controlled two-way valve, the second hydraulically controlled two-way valve, the third hydraulically controlled two-way valve and the fourth hydraulically controlled two-way valve are all connected to the constant pressure control water source.

[0042] The pilot control valve group in this embodiment is connected to the opening cavity interface and the closing cavity interface of the relay, so it belongs to double cavity control. Figure 2 The principle of this embodiment is described in detail. Figure 2 As shown:

[0043] When the relay MV001 needs to be opened, the electromagnetic reversing valve EV001 is energized (if it is a double-coil valve, the a end is energized), so that the valve core of the electromagnetic reversing valve EV001 is in the left position, and the hydraulic oil in the control oil source P reaches the oil outlet control port B through the oil inlet port P of the electromagnetic reversing valve EV001, and then enters the control chamber through the oil inlet control port of the hydraulic control reversing valve HV001, so that the valve core of the hydraulic control reversing valve HV001 is in the left position under the action of the hydraulic pressure. After that, the first control water outlet A of the hydraulic control reversing valve HV001 is connected with the drain port T, and the working chamber control port X of the first hydraulic control two-way valve CV001 and the working chamber control port X of the third hydraulic control two-way valve CV003 are both drained through the first control water outlet A of the hydraulic control reversing valve HV001. When the pressure of the constant pressure control chamber in the first hydraulically controlled two-way valve CV001 is greater than the pressure of the working chamber and the pressure of the constant pressure control chamber in the third hydraulically controlled two-way valve CV003 is greater than the pressure of the working chamber, the valve core of the first hydraulically controlled two-way valve CV001 and the valve core of the third hydraulically controlled two-way valve CV003 both move toward the working chamber under the action of constant pressure, cutting off the passage between the working chamber water inlet interface A and the working chamber water outlet interface B in their respective working chambers.

[0044] The water inlet P of the hydraulically controlled reversing valve HV001 is connected to the second control water outlet B, and the pressure water in the constant pressure control water source P enters the working chamber control port X of the second hydraulically controlled two-way valve CV002 and the working chamber control port X of the fourth hydraulically controlled two-way valve CV004 through the water inlet P and the second control water outlet B of the hydraulically controlled reversing valve HV001 in turn. When the pressure of the working chamber in the second hydraulically controlled two-way valve CV002 is greater than the pressure of the constant pressure control chamber and the pressure of the working chamber in the fourth hydraulically controlled two-way valve CV004 is greater than the pressure of the constant pressure control chamber, the valve core of the second hydraulically controlled two-way valve CV002 and the valve core of the fourth hydraulically controlled two-way valve CV004 move toward the control chamber under the action of pressure, and connect the passage between the working chamber water inlet interface A and the working chamber water outlet interface B in their respective working chambers. At this time, the pressure water in the pressure water source P enters the open cavity interface of the relay MV001 through the working cavity water inlet interface A and the working cavity water outlet interface B of the second hydraulically controlled two-way valve CV002, while the water in the closed cavity of the relay MV001 is discharged through the closed cavity interface, the working cavity water inlet interface A of the fourth hydraulically controlled two-way valve CV004, and the working cavity water outlet interface B of the fourth hydraulically controlled two-way valve CV004. As the pressure in the open cavity of the relay MV001 is greater than the pressure in the closed cavity, the relay MV001 realizes the opening operation. On the contrary, the control electromagnetic reversing valve EV001 is de-energized (if it is a double-coil valve, the b end is energized), and the closing operation of the relay MV001 can be realized.

[0045] Example 3

[0046] This embodiment is basically the same as Embodiment 2, with the main difference being:

[0047] The constant pressure control chamber of each hydraulically controlled two-way valve in the pilot control valve group is respectively connected to the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. Specifically, the constant pressure control chamber of the first hydraulically controlled two-way valve and the constant pressure control chamber of the third hydraulically controlled two-way valve are both connected to the second control water outlet of the hydraulically controlled reversing valve, and the constant pressure control chamber of the second hydraulically controlled two-way valve and the constant pressure control chamber of the fourth hydraulically controlled two-way valve are both connected to the first control water outlet of the hydraulically controlled reversing valve.

[0048] The pilot control valve group in this embodiment is connected to the open cavity interface and the closed cavity interface of the servomotor respectively, so it belongs to double cavity control. Figure 3 As shown, the implementation principle is the same as that of Example 2 and will not be repeated here.

[0049] Example 4

[0050] This embodiment discloses a combined control device based on green media, including an electromagnetic reversing valve, a hydraulically controlled reversing valve, a pilot control valve group, a relay, a pressure relay and two pressure measuring contacts, wherein the hydraulically controlled reversing valve includes an oil inlet control port, a water inlet, a drain port, a first control water outlet and a second control water outlet; the electromagnetic reversing valve can adopt an electromagnetic reversing valve as a double-coil valve or a single-coil valve, which includes an oil inlet, an oil drain port and an oil outlet control port; the pilot control valve group adopts a hydraulically controlled two-way valve controlled by a double chamber* (control chamber and working chamber), which includes a first hydraulically controlled two-way valve and a second hydraulically controlled two-way valve, and the first hydraulically controlled two-way valve and the second hydraulically controlled two-way valve both include a constant pressure control chamber, a working chamber control port, a working chamber water inlet interface and a working chamber water outlet interface; the relay includes an open chamber interface and a closed chamber interface. Among them, the structure, position and connection relationship of each component are as follows:

[0051] The oil inlet of the solenoid valve is communicated with the control oil source, and the oil outlet control port of the solenoid reversing valve is connected with the oil inlet control port of the hydraulic control reversing valve.

[0052] The water inlet of the hydraulically controlled reversing valve is connected to the constant pressure control water source, and the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve are respectively connected to the working chamber control port of the first hydraulically controlled two-way valve and the working chamber control port of the second hydraulically controlled two-way valve.

[0053] The working chamber water inlet interface of the first hydraulically controlled two-way valve is connected to the pressure water source, the working chamber water outlet interface of the first hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the second hydraulically controlled two-way valve and the open chamber interface of the relay, and the working chamber water outlet interface of the second hydraulically controlled two-way valve is connected to the return port.

[0054] The pressure relay is arranged between the oil outlet control port of the electromagnetic reversing valve and the oil inlet control port of the hydraulic control reversing valve, and is used to detect the pressure fluctuation between the electromagnetic reversing valve and the hydraulic control reversing valve, and then detect whether the hydraulic control reversing valve responds to the control of the electromagnetic reversing valve in time.

[0055] Two pressure measuring contacts are respectively arranged at the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. Pressure gauges are installed at the pressure measuring contacts to detect pressure fluctuations between the hydraulically controlled reversing valve and the pilot control valve group.

[0056] In this embodiment, the pilot control valve group also includes a third hydraulically controlled two-way valve and a fourth hydraulically controlled two-way valve. The third hydraulically controlled two-way valve and the fourth hydraulically controlled two-way valve both include a constant pressure control chamber, a working chamber control port, a working chamber water inlet interface and a working chamber water outlet interface. The working chamber control port of the third hydraulically controlled two-way valve and the working chamber control port of the fourth hydraulically controlled two-way valve are respectively connected to the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. The working chamber water inlet interface of the third hydraulically controlled two-way valve is connected to a pressure water source. The working chamber water outlet interface of the third hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the fourth hydraulically controlled two-way valve and the closing chamber interface of the relay. The working chamber water outlet interface of the fourth hydraulically controlled two-way valve is connected to the return water port.

[0057] Furthermore, a constant pressure spring is provided in the constant pressure control chamber in the pilot control valve group, and the constant pressure control function of the constant pressure control chamber is realized by the constant pressure spring.

[0058] The pilot control valve group in this embodiment is connected to the open cavity interface and the closed cavity interface of the servomotor respectively, so it belongs to double cavity control. Figure 4 As shown, the implementation principle is basically the same as that of Example 2 and will not be repeated here.

[0059] The above description is only a specific implementation mode of the present invention. Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes; all disclosed features, or all methods or steps in the process, except for mutually exclusive features and / or steps, can be combined in any way.

Claims

1. A combined control device based on green media, characterized in that: It includes an electromagnetic reversing valve, a hydraulic reversing valve, a pilot control valve group and a relay, wherein the hydraulic reversing valve includes an oil inlet control port, a water inlet port, a drain port, a first control water outlet port and a second control water outlet port; the electromagnetic reversing valve includes an oil inlet port, an oil drain port and an oil outlet control port; the pilot control valve group includes a first hydraulically controlled two-way valve and a second hydraulically controlled two-way valve, and the first hydraulically controlled two-way valve and the second hydraulically controlled two-way valve both include a constant pressure control chamber, a working chamber control port, a working chamber water inlet interface and a working chamber water outlet interface; the relay includes an opening chamber interface and a closing chamber interface; Among them, the oil inlet of the electromagnetic reversing valve is connected to the control oil source, and the oil outlet control port of the electromagnetic reversing valve is connected to the oil inlet control port of the hydraulic control reversing valve; the water inlet of the hydraulic control reversing valve is connected to the constant pressure control water source, and the first control water outlet and the second control water outlet of the hydraulic control reversing valve are respectively connected to the working chamber control port of the first hydraulically controlled two-way valve and the working chamber control port of the second hydraulically controlled two-way valve; the working chamber water inlet interface of the first hydraulically controlled two-way valve is connected to the pressure water source, the working chamber water outlet interface of the first hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the second hydraulically controlled two-way valve and the open chamber interface of the relay, and the working chamber water outlet interface of the second hydraulically controlled two-way valve is connected to the return water port.

2. The green medium-based combined control device according to claim 1, characterized in that: The pilot control valve group also includes a third hydraulically controlled two-way valve and a fourth hydraulically controlled two-way valve. The working chamber control port of the third hydraulically controlled two-way valve and the working chamber control port of the fourth hydraulically controlled two-way valve are respectively connected to the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve. The working chamber water inlet interface of the third hydraulically controlled two-way valve is connected to the pressure water source. The working chamber water outlet interface of the third hydraulically controlled two-way valve is respectively connected to the working chamber water inlet interface of the fourth hydraulically controlled two-way valve and the closing chamber interface of the relay. The working chamber water outlet interface of the fourth hydraulically controlled two-way valve is connected to the return port.

3. The green medium-based combined control device according to claim 1 or 2, characterized in that: The constant pressure control chambers in the pilot control valve group are all connected to a constant pressure control water source.

4. The green medium-based combined control device according to claim 1 or 2, characterized in that: The constant pressure control chamber in the pilot control valve group is connected to the first control water outlet and the second control water outlet of the hydraulically controlled reversing valve respectively.

5. The green medium-based combined control device according to claim 1 or 2, characterized in that: A constant pressure spring is arranged in the constant pressure control chamber in the pilot control valve group, and the constant pressure control function of the constant pressure control chamber is realized by the constant pressure spring.

6. The green medium-based combined control device according to claim 1, characterized in that: A pressure relay is arranged between the oil outlet control port of the electromagnetic reversing valve and the oil inlet control port of the hydraulic control reversing valve.

7. The green medium-based combined control device according to claim 1, characterized in that: The first control water outlet and the second control water outlet of the hydraulically controlled reversing valve are also respectively connected to pressure measuring contacts for installing a pressure gauge.

8. The green medium-based combined control device according to claim 1, characterized in that: The electromagnetic reversing valve is a double-coil valve or a single-coil valve.

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