A switch indication module for a marine valve hydraulic actuator and a control method thereof

Abstract

The present invention discloses a switch indication module for a marine valve hydraulic actuator and a control method thereof, comprising a switch indication module; the switch indication module comprises a one-way valve, a flow switch, a pressure switch, a hydraulic control valve and a solenoid valve; the switch indication module is connected to the hydraulic actuator via a hydraulic pipeline; the hydraulic actuator is connected to the valve. The hydraulic actuator is divided into two left and right oil cylinders, which drive the valve to open and close by pushing the rack-gear movement by the piston. When high-pressure oil passes through the A-line oil pipe, the piston pushes the rack-gear to open the valve, and at this time the B-line oil pipe returns to low-pressure oil; when high-pressure oil passes through the B-line oil pipe, the piston pushes the rack-gear to close the valve, and at this time the A-line oil pipe returns to low-pressure oil. The present invention detects the hydraulic oil that drives the hydraulic actuator as an indication basis for valve switching, and is installed on the hydraulic valve block in a superimposed manner together with the solenoid valve. It has a reasonable structure and reliable function. The hydraulic actuator can be remotely switched on and off.

Description

Technical Field

[0001] The invention relates to a switch indicating module of a marine valve hydraulic actuator and a control method thereof, belonging to the technical field of marine equipment. Background Art

[0002] Valve remote control systems are part of marine machinery. The hydraulic actuators that drive valve openings and closings must be equipped with on-site switch indicators, which transmit the switch signals to a control console via cables. This structure restricts valve installation to dry environments. It cannot be used on marine valves installed in harsh environments such as those subject to flooding, low temperatures, or inaccessible locations. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a switch indicating module of a marine valve hydraulic actuator and a control method thereof, thereby solving the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a switch indication module of a marine valve hydraulic actuator, including a switch indication module; the switch indication module includes a one-way valve, a flow switch, a pressure switch, a hydraulic control valve and a solenoid valve; the switch indication module is connected to the hydraulic actuator through a hydraulic pipeline; the hydraulic actuator is connected to the valve, which is divided into two left and right hydraulic cylinders, which drive the valve to open and close by pushing the rack-gear movement by the piston; the switch indication module is superimposed on the oil circuit; the oil circuit includes a high-pressure oil circuit pipe P and a return oil pipeline O; the high-pressure oil circuit pipe P is sequentially connected in series with a one-way valve, a hydraulic control valve and a solenoid valve; the solenoid valve is connected to one of the hydraulic cylinders of the hydraulic actuator through the A-line hydraulic oil pipe; the return oil pipeline O is connected in series with a solenoid valve; the solenoid valve is connected to the other hydraulic cylinder of the hydraulic actuator through the B-line hydraulic oil pipe.

[0005] Furthermore, the one-way valve is used to prevent the high-pressure oil pipe P from delivering oil to the hydraulic actuator and causing oil backflow.

[0006] Furthermore, a flow switch is provided on the hydraulic control valve; the flow switch is used to monitor and feedback the flow signal of the hydraulic oil on the hydraulic control valve.

[0007] Furthermore, two pressure switches are provided, one of which is connected in parallel to the high-pressure oil pipe P, and the other is connected in parallel to the hydraulic oil pipe A between the solenoid valve and the hydraulic actuator.

[0008] The flow switch, pressure switch and solenoid valve are connected to the electric control box.

[0009] A method for controlling a switch indicator module of a marine valve hydraulic actuator comprises the following steps:

[0010] Step 1: When the valve is opened, high-pressure oil flows through lines A and P, and low-pressure oil flows through line B. The hydraulic control valve in line A is connected. Due to the flow, the flow switch outputs a normally open signal (i.e., closed state). At this time, the pressure switches in line A and line P output normally closed signals (i.e., in the high-pressure oil state), and the valve displays an opening process signal.

[0011] Step 2: When the valve is fully opened, the hydraulic control valve in line A is disconnected. Since there is no flow, the flow switch outputs a normally closed signal (i.e., disconnected state). At this time, the pressure switch in line A and the pressure switch in line P output a normally closed signal (i.e., in a low-pressure oil state), and the valve displays a fully opened signal.

[0012] Step 3: When the valve is closed, high-pressure oil flows through the B and P lines, and low-pressure oil flows through the A line. The hydraulic control valve (4) in the A line is connected. Due to the flow, the flow switch outputs a normally open signal (i.e., closed state), the pressure switch in the P line outputs a normally closed signal (i.e., in the high-pressure oil state), and the pressure switch in the A line outputs a normally open signal (i.e., in the low-pressure oil state). The valve displays a closing process signal.

[0013] Step 4: When the valve is fully closed, the hydraulic control valve in line A is disconnected. Since there is no flow, the flow switch outputs a normally closed signal (i.e., disconnected state), the pressure switch in line P outputs a normally closed signal, and the pressure switch in line A outputs a normally open signal. The valve displays a fully open signal.

[0014] The present invention has the following beneficial effects: it detects the hydraulic oil driving the hydraulic actuator as an indication basis for valve opening and closing. It is installed on the hydraulic valve block in a stacked manner with the solenoid valve, and has a reasonable structure and reliable function. It can remotely indicate the opening and closing position of the hydraulic actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the valve circuit structure of the present invention.

[0016] In the figure: 1. Check valve, 2. Flow switch, 3. Pressure switch, 4. Hydraulic control valve, 5. Solenoid valve, 6. Hydraulic actuator, 61. Hydraulic cylinder. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0019] like Figure 1 As shown, a switch indication module for a marine valve hydraulic actuator includes a switch indication module; the switch indication module includes a one-way valve 1, a flow switch 2, a pressure switch 3, a hydraulic control valve 4 and a solenoid valve 5; the switch indication module is connected to a hydraulic actuator 6 through a hydraulic pipeline; the hydraulic actuator 6 is connected to the valve, which is divided into two left and right hydraulic cylinders 61, which drive the valve to open and close by pushing the rack-gear movement by the piston; the switch indication module is superimposed on the oil circuit; the oil circuit includes a high-pressure oil circuit pipe P and a return oil pipeline O; the one-way valve 1, the hydraulic control valve 4 and the solenoid valve 5 are sequentially connected in series on the high-pressure oil circuit pipe P; the solenoid valve 5 is connected to one of the hydraulic cylinders 61 of the hydraulic actuator 6 through the A-line hydraulic oil pipe; the solenoid valve 5 is connected in series on the return oil pipeline O; the solenoid valve 5 is connected to the other hydraulic cylinder 61 of the hydraulic actuator 6 through the B-line hydraulic oil pipe.

[0020] Preferably, in this embodiment, the one-way valve 1 is used to prevent the high-pressure oil pipe P from delivering oil to the hydraulic actuator 6 and causing oil backflow.

[0021] In this embodiment, preferably, a flow switch 2 is provided on the hydraulic control valve 4 ; the flow switch 2 is used to monitor and feedback the flow signal of the hydraulic oil on the hydraulic control valve 4 .

[0022] In this embodiment, preferably, two pressure switches 3 are provided, wherein one pressure switch 3 is connected in parallel to the high-pressure oil pipe P, and the other pressure switch 3 is connected in parallel to the hydraulic oil pipe A between the solenoid valve 5 and the hydraulic actuator 6 .

[0023] Preferably, in this embodiment, the flow switch 2, the pressure switch 3 and the solenoid valve 5 are connected to the electric control box.

[0024] Working principle:

[0025] When the valve is opened, high-pressure oil flows through A and P lines, and low-pressure oil flows through B line. The hydraulic control valve 4 in line A is connected. Due to the flow, the flow switch 2 outputs a normally open signal, that is, a closed state. At this time, the pressure switch 3 in line A and the pressure switch 3 in line P output a normally closed signal, that is, they are in a high-pressure oil state, and the valve displays an open process signal; when the valve is fully opened, the hydraulic control valve 4 in line A is disconnected. Due to the lack of flow, the flow switch 2 outputs a normally closed signal, that is, an open state. At this time, the pressure switch 3 in line A and the pressure switch 3 in line P output a normally closed signal, that is, they are in a low-pressure oil state, and the valve displays a fully opened signal;

[0026] When the valve is closed, high-pressure oil flows through the B and P lines, and low-pressure oil flows through the A line. The hydraulic control valve 4 in the A line is connected. Due to the flow, the flow switch 2 outputs a normally open signal, that is, a closed state. The pressure switch 3 in the P line outputs a normally closed signal, that is, it is in a high-pressure oil state. The pressure switch in the A line outputs a normally open signal, that is, it is in a low-pressure oil state. The valve displays a closed process signal; when the valve is fully closed, the hydraulic control valve 4 in the A line is disconnected. Due to the lack of flow, the flow switch 2 outputs a normally closed signal, that is, a disconnected state. The pressure switch 3 in the P line outputs a normally closed signal, that is, the pressure switch 3 in the A line outputs a normally open signal, and the valve displays an open position signal.

[0027] The present invention features a compact and rational structure and reliable performance. It utilizes the characteristics of the hydraulic oil driving the hydraulic actuator as a detection basis, enabling accurate and reliable display of the actuator's on / off signals. Because the hydraulic actuator and switch indicator are connected via hydraulic piping, the hydraulic actuator can be installed in any harsh environment, such as flooded, cold, or inaccessible. The switch indicator can be remotely installed via the hydraulic piping, ensuring accurate display of the actuator's on / off signals.

[0028] Since high-pressure oil is used to drive valve openings and closings, there is a risk of pipeline leakage. With this indicator module, if hydraulic oil leaks, the hydraulic oil in the pipeline will inevitably flow. The flow switch in the module will detect the signal in real time and provide feedback, thereby preventing the valve from opening or closing inadvertently.

[0029] 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 or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A switch indicator module for a marine valve hydraulic actuator, characterized in that: The invention comprises a switch indicating module; the switch indicating module comprises a one-way valve (1), a flow switch (2), a pressure switch (3), a hydraulic control valve (4) and a solenoid valve (5); the switch indicating module is connected to a hydraulic actuator (6) through a hydraulic pipeline; the hydraulic actuator (6) is connected to the valve and is divided into two left and right hydraulic cylinders (61), which drive the valve to open and close by pushing the rack-pinion movement by the piston; the switch indicating module is superimposed on the oil circuit; the oil circuit comprises a high-pressure oil circuit pipe P and a return oil circuit O; the one-way valve (1), the hydraulic control valve (4) and the solenoid valve (5) are sequentially connected in series on the high-pressure oil circuit pipe P; the solenoid valve (5) is connected to one of the hydraulic cylinders (61) of the hydraulic actuator (6) through the A-line hydraulic oil pipe; the solenoid valve (5) is connected in series on the return oil circuit O; the solenoid valve (5) is connected to the other hydraulic cylinder (61) of the hydraulic actuator (6) through the B-line hydraulic oil pipe; The hydraulic control valve (4) is provided with a flow switch (2); the flow switch (2) is used to monitor and feedback the flow signal of the hydraulic oil on the hydraulic control valve (4); Two pressure switches (3) are provided, one of which is connected in parallel to the high-pressure oil line pipe P, and the other is connected in parallel to the hydraulic oil line A between the solenoid valve (5) and the hydraulic actuator (6).

2. A marine valve hydraulic actuator switch indicator module according to claim 1, characterized in that: The flow switch (2), pressure switch (3) and solenoid valve (5) are connected to the electric control box.

3. A control method for a switch indicating module of a marine valve hydraulic actuator according to any one of claims 1 to 2, characterized in that: The following steps are involved: Step 1: When the valve is opened, high-pressure oil flows through the A and P lines, and low-pressure oil flows through the B line. The hydraulic control valve (4) in the A line is turned on. Since there is flow, the flow switch (2) outputs a normally open signal. At this time, the pressure switch (3) in the A line and the pressure switch (3) in the P line output a normally closed signal, and the valve displays an open process signal. Step 2: When the valve is fully opened, the hydraulic control valve (4) in the A circuit is disconnected. Since there is no flow, the flow switch (2) outputs a normally closed signal. At this time, the pressure switch (3) in the A circuit and the pressure switch (3) in the P circuit output a normally closed signal, and the valve displays a fully opened signal. Step 3: When the valve is closed, high-pressure oil flows through the B and P lines, and low-pressure oil flows through the A line. The hydraulic control valve (4) in the A line is turned on. Due to the flow, the flow switch (2) outputs a normally open signal, the pressure switch (3) in the P line outputs a normally closed signal, and the pressure switch in the A line outputs a normally open signal. The valve displays a closed process signal. Step 4: When the valve is fully closed, the hydraulic control valve (4) in line A is disconnected. Since there is no flow, the flow switch (2) outputs a normally closed signal, the pressure switch (3) in line P outputs a normally closed signal, and the pressure switch (3) in line A outputs a normally open signal. The valve displays a fully closed signal.

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