Dual-power hydraulic control reversing valve and actuating mechanism control device

Abstract

The utility model provides a dual-power hydraulic control reversing valve and an actuating mechanism control device aiming at the defect that a single hydraulic control reversing valve in the prior art cannot realize one-way independent control of a bidirectional actuating element under dual-power driving, the dual-power hydraulic control reversing valve comprises a valve body and a valve core, the valve body is provided with a valve core hole, and the valve core hole is communicated with the valve body. The actuating mechanism control device comprises a double-power hydraulic control reversing valve, two hydraulic pumps and an oil tank, by the adoption of the three-position five-way reversing valve of the structure, a double-acting actuating element can move in two opposite directions under the action of two power elements, and the actuating mechanism control device can control the actuating element to move in the two opposite directions under the action of the two power elements. According to the actuating mechanism control device with the structure, two-way driving of the double-acting actuating element can be realized, the structure is simple, the two-way control of the double-acting actuating element can be realized only by adopting two power elements and one hydraulic control reversing valve, the structure is particularly simple, the participation of electrical elements is basically avoided, and the control is reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve body and fluid pressure actuator technology field especially relates to a double -power liquid control reversing valve and two -way hydraulic cylinder control device. BACKGROUND

[0002] In modern industrial automation equipment, hydraulic cylinder, hydraulic motor is commonly used execution element, drive execution mechanism action, and the control of execution element is completed through hydraulic control valve or control valve assembly, and the action of execution element is controlled by electromagnetic reversing valve in the control system, and the control of electromagnetic reversing valve needs the participation of electrical components and electric control system, when this control device is used in the material transportation in the field such as port, power plant, mine, for example, when using on belt conveyor, because the working condition environment is relatively poor, the reliability of electronic components is influenced, the failure is more frequent, and the use effect is seriously affected.

[0003] In addition, in the hydraulic control system, for the same execution element, automatic continuous control is more adopted single power element or multiple power elements in parallel and electromagnetic reversing valve combination form, and the corresponding function is realized by controlling the electromagnetic reversing valve of control system, and the system is complex, and for two power elements, the current hydraulic control valve cannot meet the requirements when realizing the bidirectional independent control of execution element through a control valve.

[0004] At present, the invention patent with the name of automatic reversing valve and the publication number CN 110578728 A discloses a three-position five-way double control valve, which has a first flow inlet, a first flow outlet, a second flow outlet, a first control port and a second control port, the first flow inlet is used for communicating with a fluid source, the first flow outlet is used for connecting a flow inlet on a cylinder body, and the second flow outlet is used for connecting another flow inlet on the cylinder body.

[0005] The main valve has a first working position that the first flow inlet and the first flow outlet are communicated, a second working position that the first flow inlet and the second flow outlet are communicated, and an intermediate position that the first flow inlet and the first flow outlet and the second flow outlet are not connected; when the first control port plays a control role, the main valve is in the first working position; when the second control port plays a control role, the main valve is in the second working position; the three-position five-way double control valve with the above structure has the function of three-position five-way in the cylinder control system, but when controlling the hydraulic cylinder and double hydraulic motor, the automatic control valve can only realize the function of three-position four-way, and the automatic control valve needs to be combined with a pilot valve to form a valve assembly to realize the automatic control of double hydraulic cylinder and double hydraulic motor, the structure is complex, and the effective control of double-acting execution element under double-power drive cannot be realized. UTILITY MODEL CONTENT

[0006] The single hydraulic control reversing valve cannot realize the one-way independent control of the bidirectional actuating element under the double-power drive, and the double-power hydraulic control reversing valve and the actuating mechanism control device are provided.

[0007] The utility model discloses a following technical scheme realizes:

[0008] A double-power hydraulic control reversing valve, including valve body and valve core, be provided with valve core hole on the valve body, and the valve core is located in the valve core hole, be provided with control chamber E and control chamber F on the both ends of valve body, and control chamber E and control chamber F all communicate with valve core hole, be provided with with valve core hole can communicate liquid control reversing valve oil inlet A and liquid control reversing valve oil inlet B, liquid control reversing valve oil outlet M and liquid control reversing valve oil outlet N and liquid control reversing valve oil return T on the valve body respectively, three five ways liquid control reversing valve has liquid control reversing valve oil inlet A and control chamber F communication, liquid control reversing valve oil inlet B and control chamber E communication, and the intermediate position of liquid control reversing valve oil inlet A, liquid control reversing valve oil inlet B, liquid control reversing valve oil outlet M, liquid control reversing valve oil outlet N and liquid control reversing valve oil return between all not communicate, liquid control reversing valve oil inlet A and liquid control reversing valve oil outlet M communication simultaneously liquid control reversing valve oil outlet N and liquid control reversing valve oil return T communication left side, liquid control reversing valve oil inlet B and liquid control reversing valve oil outlet N communication simultaneously liquid control reversing valve oil outlet M and liquid control reversing valve oil return T communication right side;

[0009] The both ends of the valve core are respectively provided with inner cavity one E2 and inner cavity two F2, the inner cavity one E2 is communicated with the control chamber E, and the inner cavity two F2 is communicated with the control chamber F.

[0010] The liquid control reversing valve inlet A is communicated with the valve core hole through the A hole communication hole one, the internal oil channel two is communicated with the valve core hole through the A hole communication hole two, and the internal oil channel two is communicated with the control cavity F through the F cavity communication hole F1, so that the liquid control reversing valve inlet A is communicated with the control cavity F through the A hole communication hole one A1, the A hole communication hole two A2, the valve core hole, the F cavity communication hole F1 and the internal flow channel two, the liquid control reversing valve inlet B is communicated with the valve core hole through the B hole communication hole one B1, the internal oil channel one is communicated with the valve core hole through the B hole communication hole two B2, and the internal oil channel one is communicated with the control cavity E through the E cavity communication hole E1, so that the liquid control reversing valve inlet B is communicated with the control cavity E through the B hole communication hole one B1, the B hole communication hole two B2, the valve core hole, the E cavity communication hole E1 and the internal flow channel one, the liquid control reversing valve return oil port T is communicated with the valve core hole through the T hole communication hole T1, the liquid control reversing valve liquid outlet M is communicated with the valve core hole through the M hole communication hole M1, and the liquid control reversing valve liquid outlet N is communicated with the valve core hole through the N hole communication hole N1, and the free ends of the A hole communication hole one A1, the A hole communication hole two A2, the F cavity communication hole F1, the B hole communication hole one B1, the B hole communication hole two B2, the E cavity communication hole E1, the T hole communication hole T1, the M hole communication hole M1 and the N hole communication hole N1 are all blind holes.

[0011] The control cavity E is adjacent to the liquid control reversing valve inlet A, and the control cavity F is adjacent to the liquid control reversing valve inlet B.

[0012] The liquid control reversing valve inlet A, the liquid control reversing valve liquid outlet M, the liquid control reversing valve return oil port T, the liquid control reversing valve liquid outlet N and the liquid control reversing valve inlet B are sequentially arranged along the length direction of the valve body.

[0013] An actuator control device comprises a double-power liquid control reversing valve, two hydraulic pumps and an oil tank, the double-power liquid control reversing valve is used, the liquid control reversing valve liquid outlet N and the liquid control reversing valve liquid outlet M are used for communicating two oil chambers of a double-acting actuator element, the outlets of the two hydraulic pumps are communicated with the liquid control reversing valve inlet A and the liquid control reversing valve inlet B respectively, and the liquid control reversing valve return oil port T of the liquid control reversing valve is communicated with the return oil port of the oil tank.

[0014] The double-acting actuator element is a bidirectional actuator oil cylinder or a bidirectional hydraulic motor.

[0015] A safety valve is arranged at the outlet of each hydraulic pump, the safety valve outlet of each safety valve is communicated with the corresponding hydraulic pump outlet, the safety valve inlet of each safety valve is communicated with the oil channel between the corresponding hydraulic pump outlet and the corresponding inlet of the liquid control reversing valve, when the pressure in the hydraulic system increases to the set value of the safety valve, the safety valve is opened, and the hydraulic oil flows back to the oil tank.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The three-position five-way hydraulic control reversing valve has the following advantages: one three-position five-way hydraulic control reversing valve can realize the communication of two cavities of a double-acting executing element, so that the two power elements can be communicated with the two cavities of the double-acting executing element, the double-acting executing element can move in two opposite directions under the action of the two power elements, the double-acting executing element can realize bidirectional driving, and the structure is simple.

[0018] The executing mechanism control device has the following advantages: two power elements and one hydraulic control reversing valve can realize the bidirectional control of the double-acting executing element, the structure is particularly simple, basically no electric element is involved, and the control is reliable. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the three-position five-way hydraulic control reversing valve, and the three-position five-way hydraulic control reversing valve is in the middle position.

[0020] Figure 2 It is a on-off state schematic view when the three-position five-way hydraulic control reversing valve is in the left side position.

[0021] Figure 3 It is a on-off state schematic view when the three-position five-way hydraulic control reversing valve is in the right side position.

[0022] Figure 4 It is a structure schematic view of an internal oil passage.

[0023] Figure 5 It is a structure schematic view of the executing mechanism control device.

[0024] REFERENCE SIGNS:

[0025] Hydraulic pump one 101, hydraulic pump two 102; three-position five-way hydraulic control reversing valve 2, safety valve one 301; safety valve two 302; oil tank 4, oil suction port 5, hydraulic pump oil outlet 6; safety valve oil outlet 7, hydraulic control reversing valve oil inlet A, hydraulic control reversing valve oil inlet B, hydraulic control reversing valve oil outlet M, hydraulic control reversing valve oil outlet N, hydraulic control reversing valve oil return port T, executing hydraulic cylinder 19, valve core 50; valve body 51; valve core hole 52; internal oil passage one 53; internal oil passage two 54; A port communication hole one A1; A port communication hole two A2; B port communication hole one B1; B port communication hole two B2; E cavity communication hole E1; F cavity communication hole F1; M port communication hole M1; N port communication hole N1; T port communication hole T1, control cavity E; inner cavity one E2; control cavity F; inner cavity two F2. DETAILED DESCRIPTION

[0026] The technical scheme of the utility model is described in detail below in combination with specific embodiments and drawings. The following technical scheme of the utility model is only a specific implementation, and is not a limitation on the implementation scheme of the utility model. For the convenience of description, the utility model takes the hydraulic oil port consistent with the direction of the hydraulic oil pumped by the hydraulic pump as the oil inlet.

[0027] As shown in Figures 1-5 The utility model discloses, actuating mechanism control device includes double power hydraulic control reversing valve (hereinafter referred to as hydraulic control reversing valve), hydraulic oil tank and two hydraulic pumps. Double power hydraulic control reversing valve adopts three position five way hydraulic control reversing valve. The output end of the execution cylinder or hydraulic motor controlled by three position five way hydraulic control reversing valve and two hydraulic pumps can act independently in two directions. Execution cylinder, hydraulic motor are collectively referred to as execution element.

[0028] The structure and use process of the three position five way hydraulic control reversing valve and the actuating mechanism control device of the utility model are described below by taking the control execution cylinder as an example.

[0029] The three position five way hydraulic control reversing valve in the utility model includes valve body 51 and valve core 50, is provided with valve core hole 52 on the valve body, is provided with two control cavities on the valve body and is communicated with the valve core hole, and the two control cavities are control cavity E and control cavity F respectively, two oil inlets are hydraulic control reversing valve oil inlet A and hydraulic control reversing valve oil inlet B respectively, two oil outlets are hydraulic control reversing valve oil outlet M and hydraulic control reversing valve oil outlet N respectively, and are provided with hydraulic control reversing valve oil return port T. The oil inlet, oil outlet, oil return port, control cavity E and control cavity F of the hydraulic control reversing valve can be communicated through the internal oil channel and the valve core hole. As shown in Figure 1 And 2As shown, the three-position five-way hydraulic control reversing valve has a hydraulic control reversing valve oil inlet A and a control cavity F communication, hydraulic control reversing valve oil inlet B and control cavity E communication, the intermediate position between the hydraulic control reversing valve oil inlet, oil outlet and oil return port are not connected, hydraulic control reversing valve oil inlet A and hydraulic control reversing valve oil outlet M communication at the same time hydraulic control reversing valve oil outlet N and hydraulic control reversing valve oil return port T communication left side, hydraulic control reversing valve oil inlet B and hydraulic control reversing valve oil outlet N communication at the same time hydraulic control reversing valve oil outlet M and hydraulic control reversing valve oil return port T communication right side. The rod cavity of the cylinder is connected with the hydraulic control reversing valve oil outlet N, the rodless cavity is connected with the hydraulic control reversing valve oil outlet M, the hydraulic pump outlet 6 of the left hydraulic pump one 101 is connected with the hydraulic control reversing valve oil inlet A, the hydraulic pump outlet 6 of the right hydraulic pump two is connected with the hydraulic control reversing valve oil inlet B, and the hydraulic control reversing valve oil return port T of the hydraulic control reversing valve is connected with the oil return port of the oil tank. Under normal circumstances, the hydraulic control reversing valve is in the intermediate position, when the left hydraulic pump one works, the hydraulic oil enters the hydraulic control reversing valve oil inlet A and enters the control cavity F through the internal oil channel and the valve core hole, pushes the valve core to move to the left side, the hydraulic control reversing valve is in the left side, the hydraulic control reversing valve oil inlet A and the hydraulic control reversing valve oil outlet M are connected, the hydraulic control reversing valve oil outlet N and the hydraulic control reversing valve oil return port T are connected, the hydraulic oil is filled into the rodless cavity of the cylinder, the hydraulic oil in the rod cavity returns to the hydraulic control reversing valve oil return port T through the hydraulic control reversing valve oil outlet N, and returns to the oil tank 4 through the hydraulic control reversing valve oil return port T, the output end of the cylinder moves to the right side; when the right hydraulic pump two works, the hydraulic oil enters the hydraulic control reversing valve oil inlet B and enters the control cavity E through the internal oil channel and the valve core hole, pushes the valve core to move to the right side, the hydraulic control reversing valve is in the right side, the hydraulic control reversing valve oil inlet B and the hydraulic control reversing valve oil outlet N are connected, the hydraulic control reversing valve oil outlet M and the hydraulic control reversing valve oil return port T are connected, the hydraulic oil enters the rod cavity of the cylinder, pushes the output end to move to the left side, so as to complete the output end to move to the left side, at the same time, the hydraulic oil in the rodless cavity returns to the hydraulic control reversing valve oil return port T through the hydraulic control reversing valve oil outlet M, and returns to the oil tank through the hydraulic control reversing valve oil return port T. Preferably, the control cavity E is adjacent to the hydraulic control reversing valve oil inlet A, the control cavity F is adjacent to the hydraulic control reversing valve oil inlet B, the hydraulic control reversing valve oil inlet A, the hydraulic control reversing valve oil outlet M, the hydraulic control reversing valve oil return port T, the hydraulic control reversing valve oil outlet N, the hydraulic control reversing valve oil inlet B are arranged in sequence along the length direction of the valve body. Preferably, the hydraulic control reversing valve oil return port T is between the hydraulic control reversing valve oil inlet A and the hydraulic control reversing valve oil inlet B and located in the same row with them. The structure of the valve can be simplified. Preferably, the opening direction of the hydraulic control reversing valve oil inlet A, the hydraulic control reversing valve oil outlet M, the hydraulic control reversing valve oil return port T, the hydraulic control reversing valve oil outlet N and the hydraulic control reversing valve oil inlet B is consistent, the hydraulic control reversing valve oil inlet A, the hydraulic control reversing valve oil return port T and the hydraulic control reversing valve oil inlet B are located in the same row or the same row, and the hydraulic control reversing valve oil outlet M and the hydraulic control reversing valve oil outlet N are located in the same row or the same row.

[0030] The utility model discloses a three-position five-way hydraulic control reversing valve preferably adopts the following oil way structure to realize interconnection and intercommunication, including the internal oil way one 53 and the internal oil way two 54 that do not communicate with each other, preferably straight-through oil way for the both, and the internal oil way two 54 is communicated with the valve core hole through the A mouth communication hole two A2, the internal oil way two 54 is communicated with the control cavity F through the F cavity communication hole F1, thereby the hydraulic control reversing valve oil inlet A is communicated with the control cavity F through the A mouth communication hole one A1, the A mouth communication hole two A2, the valve core hole, the F cavity communication hole F1 and the internal flow channel two, the hydraulic control reversing valve oil inlet B is communicated with the control cavity E through the B mouth communication hole one B1, the B mouth communication hole two B2, the valve core hole, the E cavity communication hole E1 and the internal flow channel one, and the hydraulic control reversing valve oil return port T is communicated with the valve core hole through the T mouth communication hole T1, the hydraulic control reversing valve liquid outlet M is communicated with the valve core hole through the M mouth communication hole M1, and the hydraulic control reversing valve liquid outlet N is communicated with the valve core hole through the N mouth communication hole N1, wherein the free end of each communication hole, such as the A mouth communication hole one A1, the A mouth communication hole two A2, the F cavity communication hole F1, the B mouth communication hole one B1, the B mouth communication hole two B2, the E cavity communication hole E1, the T mouth communication hole T1, the M mouth communication hole M1 and the N mouth communication hole N1, is a blind hole.

[0031] The working process of the three-position five-way hydraulic control reversing valve is as follows: in the non-working condition, the three-position five-way hydraulic control reversing valve is in the middle position, when the execution cylinder needs to move to the right side, the left hydraulic pump works, the hydraulic oil enters the oil inlet A of the hydraulic control reversing valve and enters the valve core hole through the A1 connecting hole of the A port, and then enters the internal oil passage one through the A2 connecting hole of the A port, and then enters the control cavity F through the F1 connecting hole of the F cavity, pushes the valve core to move to the left side to the left side position, so that the oil inlet A of the hydraulic control reversing valve is communicated with the oil outlet M of the hydraulic control reversing valve, the oil outlet N of the hydraulic control reversing valve is communicated with the oil return port T of the hydraulic control reversing valve, the hydraulic oil enters the rodless cavity of the execution cylinder, so that the piston rod of the execution cylinder moves to the right side, and the hydraulic oil in the rod cavity returns to the oil tank through the oil outlet N of the hydraulic control reversing valve and then returns to the oil tank; when the execution cylinder needs to move to the left side, the right hydraulic pump works, the hydraulic oil enters the oil inlet B of the hydraulic control reversing valve and enters the valve core hole through the B1 connecting hole of the B port, and then enters the internal oil passage one through the B2 connecting hole of the B port, and then enters the control cavity E through the connecting hole of the control cavity E, pushes the valve core to move to the right side to the right side position, so that the oil inlet B of the hydraulic control reversing valve and the oil outlet N of the hydraulic control reversing valve are communicated with the valve core hole, so that the two are communicated, the oil outlet M of the hydraulic control reversing valve and the oil return port T of the hydraulic control reversing valve are communicated with the valve core hole, so that the two are communicated, the hydraulic oil enters the rod cavity of the execution cylinder, the hydraulic oil in the rodless cavity returns to the oil tank through the oil outlet M of the hydraulic control reversing valve and the oil return port T of the hydraulic control reversing valve, so that the hydraulic oil in the oil tank 4 can enter the one end cavity of the execution cylinder 19 through the three-position five-way hydraulic control reversing valve 2, push the execution cylinder 19 to move to the left side, at the same time, the hydraulic oil in the other cavity returns to the oil tank 4 through the three-position five-way hydraulic control reversing valve 2. The three-position five-way hydraulic control reversing valve with the structure of the utility model can realize the one-way independent control of the bidirectional execution mechanism under the action of two power elements by using one control valve, and has the advantages of simple structure, reliable control and automatic continuity.

[0032] Preferably, the inner cavity one E2 and the inner cavity two F2 are arranged at two ends of the valve core respectively, the inner cavity one E2 is communicated with the control cavity E, and the inner cavity two F2 is communicated with the control cavity F, so that the mass of the valve core is reduced, the inertia of the valve core operation is reduced, the response speed of the valve is improved, and the opening and closing of the valve are faster.

[0033] Preferably, a safety valve is arranged at the oil outlet of the hydraulic pump, the safety valve oil outlet 7 is communicated with the oil tank oil return port, and the safety valve oil inlet is communicated with the oil passage between the oil outlet of the hydraulic pump and the oil inlet of the hydraulic control reversing valve. For example, the oil inlet of the safety valve one 301 is communicated with the oil passage between the oil outlet of the left hydraulic pump and the oil inlet A of the hydraulic control reversing valve, the safety valve one oil outlet 10 is communicated with the oil tank oil return port, the safety valve oil inlet of the safety valve two 302 is communicated with the oil passage between the oil outlet of the right hydraulic pump and the oil inlet B of the hydraulic control reversing valve, and the safety valve two safety valve oil outlet 7 is communicated with the oil tank oil return port. In this way, when the pressure in the system increases to the safety valve set value, the safety valve is opened, the hydraulic oil flows back to the oil tank, and the pressure in the system is ensured to be within the safety range.

[0034] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A double power hydraulic pilot directional control valve comprising a valve body and a valve core, a valve core hole is arranged on the valve body, and the valve core is located in the valve core hole, characterized in that: Control cavities E and F are arranged at two ends of the valve body, and the control cavities E and F are communicated with the spool hole; the valve body is respectively provided with a hydraulic control reversing valve oil inlet A and a hydraulic control reversing valve oil inlet B, a hydraulic control reversing valve oil outlet M and a hydraulic control reversing valve oil outlet N, and a hydraulic control reversing valve oil return port T which can be communicated with the spool hole; the three-position five-way hydraulic control reversing valve has a middle position in which the hydraulic control reversing valve oil inlet A is communicated with the control cavity F, the hydraulic control reversing valve oil inlet B is communicated with the control cavity E, and the hydraulic control reversing valve oil inlet A, the hydraulic control reversing valve oil inlet B, the hydraulic control reversing valve oil outlet M, the hydraulic control reversing valve oil outlet N and the hydraulic control reversing valve oil return port are not communicated with each other; a left side position in which the hydraulic control reversing valve oil inlet A is communicated with the hydraulic control reversing valve oil outlet M, and the hydraulic control reversing valve oil outlet N is communicated with the hydraulic control reversing valve oil return port T; and a right side position in which the hydraulic control reversing valve oil inlet B is communicated with the hydraulic control reversing valve oil outlet N, and the hydraulic control reversing valve oil outlet M is communicated with the hydraulic control reversing valve oil return port T.

2. A dual power pilot operated directional control valve as set forth in claim 1, wherein, The two ends of the spool are respectively provided with inner cavities E2 and F2, the inner cavity E2 is communicated with the control cavity E, and the inner cavity F2 is communicated with the control cavity F.

3. A dual power pilot operated directional control valve as set forth in claim 1, wherein, The hydraulic control reversing valve oil inlet A is communicated with the spool hole through an A-port communication hole one, the internal oil passage two is communicated with the spool hole through an A-port communication hole two, and the internal oil passage two is communicated with the control cavity F through an F-cavity communication hole F1, so that the hydraulic control reversing valve oil inlet A and the control cavity F are communicated through the A-port communication hole one A1, the A-port communication hole two A2, the spool hole, the F-cavity communication hole F1 and the internal flow passage two; the hydraulic control reversing valve oil inlet B is communicated with the spool hole through a B-port communication hole one B1, the internal oil passage one is communicated with the spool hole through a B-port communication hole two B2, and the internal oil passage one is communicated with the control cavity E through an E-cavity communication hole E1, so that the hydraulic control reversing valve oil inlet B and the control cavity E are communicated through the B-port communication hole one B1, the B-port communication hole two B2, the spool hole, the E-cavity communication hole E1 and the internal flow passage one; the hydraulic control reversing valve oil return port T is communicated with the spool hole through a T-port communication hole T1; the hydraulic control reversing valve oil outlet M is communicated with the spool hole through an M-port communication hole M1; the hydraulic control reversing valve oil outlet N is communicated with the spool hole through an N-port communication hole N1; and free ends of the A-port communication hole one A1, the A-port communication hole two A2, the F-cavity communication hole F1, the B-port communication hole one B1, the B-port communication hole two B2, the E-cavity communication hole E1, the T-port communication hole T1, the M-port communication hole M1 and the N-port communication hole N1 are blind holes.

4. A dual power pilot operated directional control valve as defined in claim 1, wherein The control cavity E is adjacent to the hydraulic control reversing valve oil inlet A, and the control cavity F is adjacent to the hydraulic control reversing valve oil inlet B.

5. A dual power pilot operated directional control valve as defined in claim 4 wherein, The hydraulic control reversing valve oil inlet A, the hydraulic control reversing valve oil outlet M, the hydraulic control reversing valve oil return port T, the hydraulic control reversing valve oil outlet N, the hydraulic control reversing valve oil inlet B are sequentially arranged along the length direction of the valve body.

6. An actuator control device characterized by comprising: The double-acting hydraulic control reversing valve, two hydraulic pumps and an oil tank are included, the double-acting hydraulic control reversing valve is one of claims 1-5, the oil outlet N of the double-acting hydraulic control reversing valve and the oil outlet M of the double-acting hydraulic control reversing valve are used for connecting two oil chambers of the double-acting actuator, the oil outlets of the two hydraulic pumps are connected with the oil inlet A of the double-acting hydraulic control reversing valve and the oil inlet B of the double-acting hydraulic control reversing valve respectively, and the oil return port T of the double-acting hydraulic control reversing valve is connected with the oil return port of the oil tank.

7. An actuator control device as claimed in claim 6, characterised in that The double-acting actuator is a bidirectional hydraulic cylinder or a bidirectional hydraulic motor.

8. An actuator control device as recited in claim 6 wherein, A safety valve is arranged at the oil outlet of each hydraulic pump, the oil outlet of each safety valve is connected with the oil outlet of the corresponding hydraulic pump, the oil inlet of each safety valve is connected with the oil outlet of the corresponding hydraulic pump and the oil channel between the corresponding oil inlet of the double-acting hydraulic control reversing valve, when the pressure in the hydraulic system increases to the set value of the safety valve, the safety valve is opened, and the hydraulic oil flows back to the oil tank.

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