Hydraulic cylinder-driven pump valve combined control hydraulic integrated system and control method

Abstract

The invention discloses a pump valve combined control hydraulic integrated system driven by a hydraulic cylinder and a control method. The hydraulic integrated system comprises a pump valve conversion device, a pump control loop device and a valve control loop device. The pump-valve conversion device is connected with the pump control loop device and the valve control loop device; the pump valve conversion device comprises a pump valve conversion valve, and the pump valve conversion valve is used for controlling the hydraulic integrated system to be converted between a pump control loop and a valve control loop; the pump control loop device comprises a pump control driving source, a hydraulic control reversing valve and a pump control main valve, the pump control driving source is connected with the pump control main valve, the pump control main valve is connected with a pump valve change-over valve, and the pump valve change-over valve is connected with an execution hydraulic cylinder; the valve control loop device comprises a valve control hydraulic source and a servo valve, the valve control hydraulic source is connected with the servo valve, and the servo valve is connected with the pump valve conversion valve; and the emergency device is connected to the valve control loop and the pump control loop. Pump valve combination operation switching can be carried out according to using environment requirements, and the requirements of high efficiency, accuracy, low noise, stability, reliability and the like are met.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic systems and control technology, and in particular to a hydraulic cylinder-driven pump-valve combination-operated hydraulic integrated system and a control method. Background Art

[0002] Most of the existing hydraulic systems use the traditional electro-hydraulic servo system. It can control large inertia and generate large force or torque, and has high precision, fast response capability, good flexibility and adaptability, so it has been widely used. However, the traditional hydraulic speed control technology is inefficient. There is also pump-controlled hydraulic control technology in the prior art, which controls the speed of the motor to drive the fixed-displacement pump, and changes the speed of the motor to change the flow of the pump to achieve the effect of volumetric control. This hydraulic transmission method can overcome the shortcomings of the traditional valve-controlled hydraulic system, but it also has disadvantages such as large disturbance and high noise. There is no better solution in the prior art to integrate the two hydraulic control operation modes, and it cannot meet the needs of complex usage environments. Summary of the invention

[0003] In response to the above defects or improvement needs of the prior art, the present invention provides a hydraulic cylinder-driven pump-valve combination control hydraulic integrated system and control method, which can perform pump-valve combination control switching according to the needs of the use environment to meet the requirements of high efficiency, precision, low noise, stability and reliability.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] In some embodiments, a hydraulic cylinder-driven pump-valve combination hydraulic integrated system is provided, the hydraulic integrated system comprising:

[0006] Pump valve conversion device,

[0007] A pump control circuit device having a pump control circuit;

[0008] A valve-controlled circuit device having a valve-controlled circuit;

[0009] The pump-valve conversion device connects the pump control circuit device and the valve control circuit device;

[0010] The pump-valve conversion device comprises a pump-valve conversion valve, the pump-valve conversion valve has a pump control position and a valve control position, and the pump-valve conversion valve is used to control the hydraulic integrated system to convert between a pump control circuit and a valve control circuit;

[0011] The pump control circuit device comprises a pump control driving source, a hydraulically controlled reversing valve, and a pump control main valve. The pump control driving source comprises a first port, a second port, and a third port. The first port and the second port of the pump control driving source are connected to the pump control main valve. The pump control main valve is connected to the pump valve conversion valve. The pump valve conversion valve is connected to the actuator hydraulic cylinder. The third port of the pump control driving source is connected to the hydraulically controlled reversing valve. The hydraulically controlled reversing valve is connected to the pump control main valve. The pump control main valve is a two-position four-way hydraulic reversing valve.

[0012] The valve-controlled circuit device comprises a valve-controlled hydraulic source and a servo valve, wherein the valve-controlled hydraulic source is connected to the servo valve, and the servo valve is connected to the pump-valve conversion valve;

[0013] An emergency device is connected to the valve control circuit and the pump control circuit, and is used to cut off the valve control circuit and the pump control circuit.

[0014] In some embodiments, the emergency device includes an emergency hydraulic source, a valve-controlled selector valve, a hydraulic reversing valve, and a relief valve;

[0015] The emergency hydraulic source is connected to the valve-controlled selection valve, one end of the valve-controlled selection valve is connected to the pump-valve conversion valve, and the other end is connected to the servo valve, and the valve-controlled selection valve is used to cut off the valve-controlled circuit under the pressure of the emergency hydraulic source;

[0016] The emergency hydraulic source is connected to the hydraulic reversing valve, and the hydraulic reversing valve is connected to the pump-controlled main valve. The hydraulic reversing valve is used to form an emergency hydraulic source passage under the pressure of the emergency hydraulic source, so that the pressure of the emergency hydraulic source acts on the pump-controlled main valve, so that the pump-controlled main valve switches from the working position to the bypass position, thereby bypassing the first port and the second port of the pump-controlled driving source;

[0017] The hydraulic reversing valve is also connected to the hydraulically controlled reversing valve, which is connected to the overflow valve. The hydraulic reversing valve is used to form an emergency hydraulic source passage under the pressure of the emergency hydraulic source, so that the pressure of the emergency hydraulic source acts on the hydraulically controlled reversing valve, so that the hydraulically controlled reversing valve switches from the connecting position to the shut-off position, so that the pressure oil of the third port of the pump-controlled driving source reaches the overflow valve, so that the overflow valve is in a connecting state.

[0018] In some embodiments, the valve-controlled circuit device includes a first electromagnetic reversing valve and a hydraulically controlled one-way valve, wherein the hydraulically controlled one-way valve is disposed between the first port of the valve-controlled hydraulic source and the servo valve; the first port of the valve-controlled hydraulic source is an oil outlet;

[0019] One end of the first electromagnetic reversing valve is connected to the valve-controlled hydraulic source, and the other end is connected to the hydraulic reversing valve, the hydraulic-controlled one-way valve, and the pump-valve conversion valve;

[0020] At the gain potential of the first electromagnetic reversing valve, the valve-controlled hydraulic source is in a connected state with the hydraulic-controlled one-way valve, the pump-valve conversion valve, and the hydraulic reversing valve through the first electromagnetic reversing valve, so that the oil outlet of the valve-controlled hydraulic source is connected with the servo valve, the pump-valve conversion valve is in the valve-controlled position, and the hydraulic reversing valve forms a valve-controlled hydraulic source passage and acts on the pump-controlled main valve and the hydraulic-controlled reversing valve;

[0021] When the first electromagnetic reversing valve is in the off state, the first port of the valve-controlled hydraulic source and the hydraulic-controlled one-way valve, the pump-valve conversion valve, and the hydraulic reversing valve are all in a cut-off state, and the valve-controlled circuit is in a disconnected state.

[0022] In some embodiments, the servo valve includes a first servo valve and a second servo valve, and the valve control circuit device further includes a servo valve conversion valve, one end of the servo valve conversion valve is connected to the first servo valve and the second servo valve, and the other end is connected to the valve control selection valve;

[0023] The valve-controlled circuit device also includes a second electromagnetic reversing valve, which is connected to the servo valve conversion valve and is used to control the servo valve conversion valve to switch the connection between the first servo valve and the second servo valve.

[0024] In some embodiments, one end of the second electromagnetic reversing valve is connected to the first port of the valve-controlled hydraulic source, and the other end is connected to the servo valve conversion valve;

[0025] When the second solenoid reversing valve is at the attained potential, the second solenoid reversing valve transmits the hydraulic force of the valve-controlled hydraulic source to the servo valve conversion valve. Under the action of the hydraulic force, the servo valve conversion valve is in the second working position and is connected to the second servo valve, and is cut off from the first servo valve, thereby realizing the conversion connection from the first servo valve to the second servo valve.

[0026] In some embodiments, the emergency hydraulic source is connected to a safety protection device, and when the safety protection device is activated, the emergency hydraulic source is activated.

[0027] In some embodiments, the hydraulic integrated system includes a valve-controlled vibration reduction element, and the valve-controlled vibration reduction element includes a first valve-controlled vibration reduction element and a second valve-controlled vibration reduction element;

[0028] The first valve-controlled damping element is connected between the first port of the valve-controlled hydraulic source and the servo valve;

[0029] The second valve-controlled damping element is connected between the second port of the valve-controlled hydraulic source and the servo valve, and is connected between the servo valve conversion valve and the valve-controlled selection valve.

[0030] In some embodiments, the relief valve is a safety valve.

[0031] In some embodiments, a hydraulic control method for a pump-valve combination operated by a hydraulic cylinder is further provided. The hydraulic control method is performed according to the above-mentioned hydraulic cylinder-driven pump-valve combination operated hydraulic integrated system. The hydraulic control method includes:

[0032] During pump control, the first electromagnetic reversing valve loses power, the pump-valve conversion valve is in the pump control circuit connection position, the pump control circuit is connected to the actuator hydraulic cylinder, and the valve control circuit is cut off from the actuator hydraulic cylinder;

[0033] During valve control, the first electromagnetic reversing valve is energized, the pump-valve conversion valve is in the valve control circuit connection position, and the valve control circuit is connected to the actuator hydraulic cylinder.

[0034] In some embodiments, the hydraulic control method includes:

[0035] Under the action of the control signal of the actuator hydraulic cylinder, the servo valve core opening amount of the servo valve opens according to the preset requirements, adjusts the pressure and flow of the pressure oil passing through the servo valve, and thus controls the displacement of the actuator hydraulic cylinder.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] By manipulating the hydraulic integrated system with the pump-valve combination of the present application, reliable switching between the pump-controlled and valve-controlled circuits can be achieved. In some embodiments of the application, main and backup servo valves and their mutual conversion are adopted to realize the redundant design of valve control, making the system safer and more reliable. In addition, the design of the emergency device and its control are simple and reliable, which can cut off the pump-controlled circuit and the valve-controlled circuit at the same time, and ensure the bypass of the pump-controlled main valve to ensure the safety of the system. The technical effects of the present application are not limited to the above examples, and the specific technical effects are described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of a hydraulic integrated system for manipulating a pump-valve combination driven by a hydraulic cylinder in some embodiments of the present invention.

[0039] Figure 2 This is a structural block diagram of a hydraulic integrated system for manipulating a pump-valve combination driven by a hydraulic cylinder in some embodiments of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "lateral", "longitudinal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. The interpretation of such terms should be conducted from the perspective of those skilled in the art.

[0042] In the present invention, unless otherwise clearly defined and specified, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense from the perspective of those skilled in the art. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] 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.

[0044] Figure 1 It is a schematic diagram of the structural principle of a hydraulic integrated system for operating a pump-valve combination driven by a hydraulic cylinder in some embodiments of the present invention. Figure 2 This is a structural block diagram of a hydraulic integrated system for manipulating a pump-valve combination driven by a hydraulic cylinder in some embodiments of the present invention.

[0045] refer to Figure 1 and Figure 2 In some embodiments, a hydraulic cylinder driven pump-valve combination hydraulic integrated system is provided, the hydraulic integrated system comprising:

[0046] Pump-valve conversion device 100,

[0047] The pump control circuit device 200 has a pump control circuit;

[0048] The valve-controlled circuit device 300 includes a valve-controlled circuit.

[0049] The pump-valve conversion device 100 is connected to the pump control loop device 200 and the valve control loop device 300 .

[0050] The pump-valve conversion device 100 comprises a pump-valve conversion valve 1, wherein the pump-valve conversion valve 1 has a pump control position ( Figure 1 As shown) and valve control position, the pump-valve conversion valve 1 is used to control the hydraulic integrated system to convert between the pump control circuit and the valve control circuit.

[0051] The pump control circuit device 200 includes a pump control driving source, a hydraulically controlled reversing valve 9, and a pump control main valve 8. The pump control driving source includes a first port A, a second port B, and a third port K. The first port A and the second port B of the pump control driving source are connected to the pump control main valve 8. The pump control main valve 8 is connected to the pump valve conversion valve 1. The pump valve conversion valve 1 is connected to the actuator hydraulic cylinder (not shown). Figure 1 The A01 and B01 ports are connected to the two hydraulic chambers of the actuator hydraulic cylinder), the third port K of the pump-controlled driving source is connected to the hydraulically controlled reversing valve 9, and the hydraulically controlled reversing valve 9 is connected to the pump-controlled main valve 8. In some embodiments, the pump-controlled main valve 8 is a two-position four-way hydraulic reversing valve.

[0052] The valve-controlled circuit device 300 includes a valve-controlled hydraulic source and a servo valve. The valve-controlled hydraulic source is connected to the servo valve, and the servo valve is connected to the pump-valve conversion valve 1 .

[0053] The emergency device 400 is connected to the valve control circuit and the pump control circuit, and the emergency device 400 is used to cut off the valve control circuit and the pump control circuit.

[0054] In the embodiments of the present application, the hydraulic integrated system is controlled by a pump-valve conversion valve to convert between the pump-controlled circuit and the valve-controlled circuit. The emergency device can simultaneously cut off the valve-controlled circuit and the pump-controlled circuit in an emergency, and the overall system switching is convenient and reliable.

[0055] In some embodiments, the emergency device 400 includes an emergency hydraulic source, a valve-controlled selection valve 2 , a hydraulic reversing valve 10 , and a relief valve 11 .

[0056] The emergency hydraulic source is connected to the valve-controlled selection valve 2, one end of the valve-controlled selection valve 2 is connected to the pump-valve conversion valve 1, and the other end is connected to the servo valve. The valve-controlled selection valve 2 is used to cut off the valve control circuit under the pressure of the emergency hydraulic source.

[0057] The emergency hydraulic source is connected to the hydraulic reversing valve 10, and the hydraulic reversing valve 10 is connected to the pump-controlled main valve 8. The hydraulic reversing valve 10 is used to form an emergency hydraulic source passage under the pressure of the emergency hydraulic source, so that the pressure of the emergency hydraulic source acts on the pump-controlled main valve 8, so that the pump-controlled main valve 8 switches from the working position to the bypass position, so that the first port A and the second port B of the pump-controlled driving source are bypassed;

[0058] The hydraulic reversing valve 10 is also connected to the hydraulically controlled reversing valve 9, and the hydraulically controlled reversing valve 9 is connected to the overflow valve 11. The hydraulic reversing valve 10 is used to form an emergency hydraulic source passage under the pressure of the emergency hydraulic source, so that the pressure of the emergency hydraulic source acts on the hydraulically controlled reversing valve 9, so that the hydraulically controlled reversing valve 9 switches from the connecting position to the blocking position, so that the pressure oil of the third port of the pump-controlled driving source reaches the overflow valve, so that the overflow valve is in a connecting state.

[0059] In the embodiment of the present application, the emergency device can simultaneously control the valve control circuit and the pump control circuit to be in the cut-off state through the valve-controlled selection valve 2 and the hydraulic reversing valve 10, ensuring that the hydraulic automatic control is cut off in the emergency state to ensure system safety.

[0060] In some embodiments, the emergency hydraulic source is Figure 1 The emergency hydraulic source is connected to the safety protection device. When the safety protection device is activated, the emergency hydraulic source is activated, and the emergency hydraulic source K01 port produces pressure oil. In some embodiments, the safety protection device is a device that cuts off the driving pressure oil of the pump control circuit and the valve control circuit of the actuator hydraulic cylinder in an emergency state to achieve safety protection of the actuator hydraulic cylinder. In some embodiments, the safety protection device is an emergency manual mechanism or an automatic trigger sensor mechanism.

[0061] In some embodiments, the valve-controlled circuit device includes a first electromagnetic reversing valve 5 and a hydraulically controlled one-way valve 12, wherein the hydraulically controlled one-way valve 12 is arranged between the first port P of the valve-controlled hydraulic source and the servo valve; the first port P of the valve-controlled hydraulic source is an oil outlet.

[0062] One end of the first electromagnetic reversing valve 5 is connected to the first port P of the valve-controlled hydraulic source, and the other end is connected to the hydraulic reversing valve 10 , the hydraulic-controlled one-way valve 12 , and the pump-valve conversion valve 1 .

[0063] At the gain potential of the first solenoid reversing valve 5, the first port P of the valve-controlled hydraulic source is connected with the hydraulically controlled one-way valve 12, the pump-valve conversion valve 1, and the hydraulic reversing valve 10 through the first solenoid reversing valve 5, so that the oil outlet P of the valve-controlled hydraulic source is connected with the servo valve, the pump-valve conversion valve 1 is in the valve-controlled position, the hydraulic reversing valve 10 forms a valve-controlled hydraulic source passage, and acts on the pump-controlled main valve 8 and the hydraulically controlled reversing valve 9.

[0064] When the first electromagnetic reversing valve 5 is in the off state, the first port P of the valve-controlled hydraulic source and the hydraulic-controlled one-way valve 12, the pump-valve conversion valve 1, and the hydraulic reversing valve 10 are all in the cut-off state, and the valve-controlled circuit is in the disconnected state.

[0065] Specifically, in some embodiments, the pump-valve conversion valve 1 is a two-position six-way hydraulic reversing valve having a pump control position and a valve control position. The six ports of the pump-valve conversion valve 1 are respectively connected to the first port A and the second port B of the pump-controlled hydraulic source, the first port P and the second port T of the valve-controlled hydraulic source, and the first port A01 and the second port B01 of the driving hydraulic cylinder. Among them, the first port P and the second port T of the valve-controlled hydraulic source are the oil outlet and the oil return port, respectively. The first port A01 and the second port B01 of the driving hydraulic cylinder are respectively connected to the two hydraulic oil chambers of the driving hydraulic cylinder, and the driving hydraulic cylinder is a single-rod double-driving hydraulic cylinder. The first port A and the second port B of the pump-controlled hydraulic source can be used as the oil inlet and the oil return port, respectively.

[0066] In some embodiments, the pump-controlled main valve 8 is a two-position four-way hydraulic reversing valve. The pump-controlled main valve 8 has a connecting position and a shutoff position. The pump-controlled main valve 8 has a first hydraulic chamber and a second hydraulic chamber. The first hydraulic chamber of the pump-controlled main valve 8 is connected to the hydraulic reversing valve 9, and the second hydraulic chamber of the pump-controlled main valve 8 is connected to the hydraulic reversing valve 10. In the connecting position, the first port A and the second port B of the pump-controlled hydraulic source are connected to the pump-controlled main valve 8, and reversing can be achieved.

[0067] The hydraulic reversing valve 10 is a two-position three-way hydraulic reversing valve. The hydraulic reversing valve 10 has a valve control position and an emergency position. The hydraulic reversing valve 10 has a first hydraulic chamber and a second hydraulic chamber. The first hydraulic chamber of the hydraulic reversing valve 10 is connected to the first electromagnetic reversing valve 5, and the second hydraulic chamber of the hydraulic reversing valve 10 is connected to the emergency hydraulic source port K01.

[0068] In some embodiments, the servo valve includes a first servo valve 3 and a second servo valve 4, and the valve-controlled loop device also includes a servo valve conversion valve 7, one end of the servo valve conversion valve 7 is connected to the first servo valve 3 and the second servo valve 4, and the other end is connected to the valve-controlled selection valve 2.

[0069] The valve control circuit device also includes a second electromagnetic reversing valve 6, which is connected to the servo valve conversion valve 7. The second electromagnetic reversing valve 6 is used to control the servo valve conversion valve 7 to switch the connection between the first servo valve 3 and the second servo valve 4.

[0070] In some embodiments, one end of the second electromagnetic reversing valve 6 is connected to the first port P of the valve-controlled hydraulic source, and the other end is connected to the servo valve conversion valve 7. In some embodiments, the servo valve conversion valve 7 is a two-position six-way hydraulic reversing valve having a first hydraulic chamber and a second hydraulic chamber, wherein the first hydraulic chamber of the servo valve conversion valve 7 is connected to the second electromagnetic reversing valve 6, and the second hydraulic chamber is connected to the oil return port T of the valve-controlled hydraulic source.

[0071] When the second solenoid reversing valve 6 is at the potential, the second solenoid reversing valve 6 transmits the hydraulic force of the valve-controlled hydraulic source to the servo valve conversion valve 7. Under the action of the hydraulic force, the servo valve conversion valve 7 is in the second working position and is connected to the second servo valve 4, and is cut off from the first servo valve 3, thereby realizing the conversion connection from the first servo valve 3 to the second servo valve 4.

[0072] In the embodiment of the present application, the first servo valve 3 can be used as the main servo valve, and the second servo valve 4 can be used as the backup servo valve. The servo valve conversion valve 7 is used to switch the connection between the first servo valve 3 and the second servo valve 4, so that the valve control circuit can realize the mutual conversion between the main and backup servo valves, realize redundant design, and be more reliable.

[0073] In some embodiments, the first solenoid reversing valve 5 and the second solenoid reversing valve 6 are both two-position four-way solenoid reversing valves. The first solenoid reversing valve 5 and the second solenoid reversing valve 6 can both be connected to the oil unloading port X. In the embodiment of the present application, the control of the valve control circuit and the switching of the main and standby servo valves are realized by controlling the power on and off of the first solenoid reversing valve 5 and the second solenoid reversing valve 6 and the connection and cutoff of the servo valve switching valve 7 with the first servo valve 3 and the second servo valve 4.

[0074] In some embodiments, the hydraulic integrated system includes a valve-controlled vibration reduction element, wherein the valve-controlled vibration reduction element includes a first valve-controlled vibration reduction element (not directly shown in the figure, Figure 1 connected to port C) and a second valve-controlled damping element (not directly shown in the figure, Figure 1 Connected to port D).

[0075] The first valve-controlled damping element is connected between the first port P of the valve-controlled hydraulic source and the servo valve.

[0076] The second valve-controlled damping element is connected between the second port T of the valve-controlled hydraulic source and the servo valve, and is connected between the servo valve conversion valve 7 and the valve-controlled selection valve 2 .

[0077] In some embodiments, the valve-controlled damping element may be an accumulator.

[0078] In some embodiments, the hydraulic integrated system includes a safety valve, which is a relief valve 11. The relief valve is a safety valve of the hydraulic integrated system, which plays a protective role when the control oil pressure is too high, and its set pressure can be 2.5 MPa.

[0079] In some embodiments, a hydraulic control method for hydraulic cylinder driven pump-valve combination manipulation is provided, the hydraulic control method is performed according to the hydraulic cylinder driven pump-valve combination manipulation hydraulic integrated system, the hydraulic control method comprising:

[0080] When the pump is controlled, the valve control selection valve loses power, the pump-valve conversion valve is in the pump control circuit connection position, the pump control circuit is connected to the actuator hydraulic cylinder, and the valve control circuit is cut off from the actuator hydraulic cylinder;

[0081] During valve control, the valve control selection valve is energized, the pump-valve conversion valve is in the valve control circuit connection position, and the valve control circuit is connected to the actuator hydraulic cylinder.

[0082] In some embodiments, the hydraulic control method includes:

[0083] Under the action of the control signal of the actuator hydraulic cylinder, the servo valve core opening amount of the servo valve opens according to the preset requirements, adjusts the pressure and flow of the pressure oil passing through the servo valve, and thus controls the displacement of the actuator hydraulic cylinder.

[0084] In some embodiments, the hydraulic control method for manipulating a pump-valve combination driven by a hydraulic cylinder of the present application is specifically as follows.

[0085] (1) Pump control drive mode

[0086] In the initial stage, all valves are in Figure 1 When the pump control circuit device controls the actuator hydraulic cylinder, the first electromagnetic reversing valve 5 loses power, the pump control drive source starts, and the pressure oil at port K acts on the first hydraulic chamber ( Figure 1 Under the action of hydraulic power, the pump control main valve 8 is in the working position ( Figure 1 The pump-controlled drive source A and B ports can output hydraulic oil to the actuator hydraulic cylinder to achieve pump-controlled drive.

[0087] (2) Pump-valve conversion

[0088] The switching between the pump control circuit and the valve control circuit is realized by the pump-valve conversion valve 1. When the pump is controlled, the first electromagnetic reversing valve 5 loses power. At this time, the first hydraulic chamber ( Figure 1 The hydraulic force of the middle and upper chamber is greater than that of the second hydraulic chamber ( Figure 1 The hydraulic force of the middle and lower chamber makes the pump-valve switching valve 1 in the pump control position ( Figure 1 The pump control main valve 8 is in the working position ( Figure 1At this time, the pump control driving source A port and B port of the pump control circuit are connected to the actuator hydraulic cylinder, and the valve control circuit is cut off from the actuator hydraulic cylinder; similarly, during valve control, the first electromagnetic reversing valve 5 is energized, and the pump-valve conversion valve 1 is in the valve control position ( Figure 1 Middle and lower position) and the pump control main valve 8 is in the cut-off position ( Figure 1 At this time, the pump control driving source A port and B port of the pump control circuit are bypassed with each other, while the valve control circuit is connected with the two chambers of the actuator hydraulic cylinder.

[0089] (3) Mutual conversion between main and standby servo valves

[0090] In the initial stage of the valve control circuit being connected, the main servo valve 3 is in the working position. When the standby servo valve needs to work, the second electromagnetic reversing valve 6 is energized, and at this time, under the action of the hydraulic force, the servo valve conversion valve 7 is reversed and works in the lower position, completing the conversion of the main servo valve 3 to the standby servo valve 4. On the contrary, the electromagnetic reversing valve 6 loses power, and the main servo valve 3 is in the working position.

[0091] (4) Emergency switching

[0092] When the emergency manual operating mechanism is pulled up or the automatic trigger sensor mechanism of the hydraulic cylinder safety protection device is started, the pressure oil at port K01 on the hydraulic system of the hydraulic cylinder and pump valve combination operation reaches 8MPa-10MPa. At this time, under the action of the pressure oil, the valve control selector valve 2 switches to the cut-off state ( Figure 1 The valve control circuit is cut off. At the same time, the pressure oil at port K01 acts on the second hydraulic chamber of the pump control main valve 8, and the pump control main valve 8 is in the bypass position ( Figure 1 In addition, the pressure oil at port K01 acts on the second hydraulic chamber of the hydraulic control reversing valve 9, and the hydraulic control reversing valve 9 is in the cut-off position ( Figure 1 The pump control circuit is cut off.

[0093] (5) Valve-controlled drive actuator hydraulic cylinder

[0094] During valve control, the servo valve (the first servo valve or the second servo valve) opens the spool as required under the action of the control signal. At this time, the pressure oil of the valve-controlled hydraulic source changes its pressure and flow rate after passing through the servo valve, thereby realizing the displacement control of the hydraulic cylinder.

[0095] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic cylinder driven pump valve combination control hydraulic integrated system, characterized in that: The hydraulic integrated system comprises: Pump valve conversion device, A pump control circuit device having a pump control circuit; A valve-controlled circuit device having a valve-controlled circuit; The pump-valve conversion device connects the pump control circuit device and the valve control circuit device; The pump-valve conversion device comprises a pump-valve conversion valve (1), the pump-valve conversion valve having a pump control position and a valve control position, and the pump-valve conversion valve is used to control the hydraulic integrated system to convert between a pump control circuit and a valve control circuit; The pump control circuit device comprises a pump control driving source, a hydraulically controlled reversing valve (9), and a pump control main valve (8), wherein the pump control driving source comprises a first port, a second port, and a third port, wherein the first port and the second port of the pump control driving source are connected to the pump control main valve, wherein the pump control main valve is connected to the pump valve conversion valve, wherein the pump valve conversion valve is connected to an actuator hydraulic cylinder, wherein the third port of the pump control driving source is connected to the hydraulically controlled reversing valve, wherein the hydraulically controlled reversing valve is connected to the pump control main valve, and wherein the pump control main valve is a two-position four-way hydraulically operated reversing valve; The valve-controlled circuit device comprises a valve-controlled hydraulic source and a servo valve, wherein the valve-controlled hydraulic source is connected to the servo valve, and the servo valve is connected to the pump-valve conversion valve; An emergency device is connected to the valve control circuit and the pump control circuit, and is used to cut off the valve control circuit and the pump control circuit.

2. The hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 1, characterized in that: The emergency device comprises an emergency hydraulic source, a valve-controlled selector valve (2), a hydraulic reversing valve (10), and a relief valve (11); The emergency hydraulic source is connected to the valve-controlled selection valve, one end of the valve-controlled selection valve is connected to the pump-valve conversion valve, and the other end is connected to the servo valve, and the valve-controlled selection valve is used to cut off the valve-controlled circuit under the pressure of the emergency hydraulic source; The emergency hydraulic source is connected to the hydraulic reversing valve, and the hydraulic reversing valve is connected to the pump-controlled main valve. The hydraulic reversing valve is used to form an emergency hydraulic source passage under the pressure of the emergency hydraulic source, so that the pressure of the emergency hydraulic source acts on the pump-controlled main valve, so that the pump-controlled main valve switches from the working position to the bypass position, thereby bypassing the first port and the second port of the pump-controlled driving source; The hydraulic reversing valve is also connected to the hydraulically controlled reversing valve, which is connected to the overflow valve. The hydraulic reversing valve is used to form an emergency hydraulic source passage under the pressure of the emergency hydraulic source, so that the pressure of the emergency hydraulic source acts on the hydraulically controlled reversing valve, so that the hydraulically controlled reversing valve switches from the connecting position to the shut-off position, so that the pressure oil of the third port of the pump-controlled driving source reaches the overflow valve, so that the overflow valve is in a connecting state.

3. The hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 2, characterized in that: The valve-controlled circuit device comprises a first electromagnetic reversing valve (5) and a hydraulically controlled one-way valve (12), wherein the hydraulically controlled one-way valve is arranged between a first port of the valve-controlled hydraulic source and the servo valve; the first port of the valve-controlled hydraulic source is an oil outlet; One end of the first electromagnetic reversing valve is connected to the valve-controlled hydraulic source, and the other end is connected to the hydraulic reversing valve, the hydraulic-controlled one-way valve, and the pump-valve conversion valve; At the gain potential of the first electromagnetic reversing valve, the valve-controlled hydraulic source is in a connected state with the hydraulic-controlled one-way valve, the pump-valve conversion valve, and the hydraulic reversing valve through the first electromagnetic reversing valve, so that the oil outlet of the valve-controlled hydraulic source is connected with the servo valve, the pump-valve conversion valve is in the valve-controlled position, and the hydraulic reversing valve forms a valve-controlled hydraulic source passage and acts on the pump-controlled main valve and the hydraulic-controlled reversing valve; When the first electromagnetic reversing valve is in the off state, the first port of the valve-controlled hydraulic source and the hydraulic-controlled one-way valve, the pump-valve conversion valve, and the hydraulic reversing valve are all in a cut-off state, and the valve-controlled circuit is in a disconnected state.

4. The hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 3, characterized in that: The servo valve comprises a first servo valve (3) and a second servo valve (4), and the valve control circuit device further comprises a servo valve conversion valve, one end of the servo valve conversion valve is connected to the first servo valve and the second servo valve, and the other end is connected to the valve control selection valve; The valve control circuit device also includes a second electromagnetic reversing valve (6), which is connected to the servo valve conversion valve and is used to control the servo valve conversion valve to switch the connection between the first servo valve and the second servo valve.

5. The hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 4, characterized in that: One end of the second electromagnetic reversing valve is connected to the first port of the valve-controlled hydraulic source, and the other end is connected to the servo valve conversion valve; When the second solenoid reversing valve is at the attained potential, the second solenoid reversing valve transmits the hydraulic force of the valve-controlled hydraulic source to the servo valve conversion valve. Under the action of the hydraulic force, the servo valve conversion valve is in the second working position and is connected to the second servo valve, and is cut off from the first servo valve, thereby realizing the conversion connection from the first servo valve to the second servo valve.

6. The hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 5, characterized in that: The emergency hydraulic source is connected to a safety protection device, and when the safety protection device is activated, the emergency hydraulic source is activated.

7. The hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 6, characterized in that: The hydraulic integrated system includes a valve-controlled vibration reduction element, and the valve-controlled vibration reduction element includes a first valve-controlled vibration reduction element and a second valve-controlled vibration reduction element; The first valve-controlled damping element is connected between the first port of the valve-controlled hydraulic source and the servo valve; The second valve-controlled damping element is connected between the second port of the valve-controlled hydraulic source and the servo valve, and is connected between the servo valve conversion valve and the valve-controlled selection valve.

8. The hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 7, characterized in that: The overflow valve is a safety valve.

9. A hydraulic control method for a pump-valve combination driven by a hydraulic cylinder, characterized in that: The hydraulic control method is performed according to the hydraulic cylinder driven pump valve combination control hydraulic integrated system according to claim 8, and the hydraulic control method comprises: During pump control, the first electromagnetic reversing valve loses power, the pump-valve conversion valve is in the pump control circuit connection position, the pump control circuit is connected to the actuator hydraulic cylinder, and the valve control circuit is cut off from the actuator hydraulic cylinder; During valve control, the first electromagnetic reversing valve is energized, the pump-valve conversion valve is in the valve control circuit connection position, and the valve control circuit is connected to the actuator hydraulic cylinder.

10. The hydraulic control method according to claim 9, characterized in that: The hydraulic control method comprises: Under the action of the control signal of the actuator hydraulic cylinder, the servo valve core opening amount of the servo valve opens according to the preset requirements, adjusts the pressure and flow of the pressure oil passing through the servo valve, and thus controls the displacement of the actuator hydraulic cylinder.

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