Control device of valve electro-hydraulic actuating mechanism

Abstract

The utility model relates to a control device of a valve electro-hydraulic actuating mechanism, which comprises a switching power supply and a control unit, an input end of the switching power supply is connected with a battery, the switching power supply is used for providing a working power supply, and the control unit comprises a CPU (central processing unit) module and an analog quantity input module. A digital quantity output port of the CPU module is respectively connected with a digital quantity input port of the motor forward and reverse rotation control module and a coil of the relay group, and a three-phase power supply output end of the motor forward and reverse rotation control module is connected with the motor; the analog quantity input module is connected with the valve position sensor, the oil level sensor, the pressure sensor and the temperature sensor through ports. The utility model has the advantages that the HMI human-computer interaction screen is used for starting and stopping the equipment, so that the operation is simple and visual; maintenance personnel can check the equipment operation state and alarm prompt at any time through the HMI human-computer interaction screen, operation is simple, and time and labor are saved. And an instruction is sent to the CPU module through cloud management, so that the equipment performs corresponding actions, and the number of connected cables is small.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a control device for a valve electro-hydraulic actuator. Background Art

[0002] The tank root valve is a physical isolation device between the oil depot tank body and the connecting pipeline. When a fire or pipeline leakage occurs around the tank area, it can timely isolate the connection between the tank and the outside world. The tank root valve is driven by an actuator. Most existing oil depots use actuators on site, which have the following problems:

[0003] 1) The monitoring system of the actuator mainly adopts wired connection, which has a large number of connecting cables, high construction cost and inconvenient system maintenance and management;

[0004] 2) The detection instrument is an on-site instrument, which is inspected manually and the operating status of the actuator is recorded manually and regularly. The inspection efficiency is low, there is human procrastination, the recorded data is not true, and the maintenance is time-consuming and labor-intensive; improvement is urgently needed. Summary of the invention

[0005] The purpose of the utility model is to provide a control device for a valve electro-hydraulic actuator, which can collect data information of equipment detection instruments in real time, record data truthfully and reliably, and transmit the collected data information to a cloud management center.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A control device for a valve electro-hydraulic actuator comprises a switching power supply and a control unit, wherein the input end of the switching power supply is connected to a battery, the switching power supply is used to provide a working power supply, the control unit comprises a CPU module and an analog input module, the digital output port of the CPU module is respectively connected to the digital input port of a motor forward and reverse control module and the coil of a relay group, the three-phase power output end of the motor forward and reverse control module is connected to the motor; the analog input module is connected to a valve position sensor, an oil level sensor, a pressure sensor, and a temperature sensor through a port;

[0008] The relay group includes relay 1, relay 2, and relay 3. The emergency cut-off signal is connected to the coil of the ESD relay. Branch 1 is connected to solenoid valve 3. Branch 1 includes the normally open contacts of relay 3 and the normally open contacts of the ESD relay connected in series. Normally open contact 1 of relay 1 is connected to solenoid valve 1, and normally open contact 1 of relay 2 is connected to solenoid valve 2.

[0009] The control unit also includes a communication module, an HMI human-machine interaction screen, and a wireless communication module. The CPU module, the analog input module, and the communication module are connected through ports. The communication module is connected to the HMI human-machine interaction screen, and the CPU module is connected to the wireless communication module.

[0010] The wireless communication module uploads the data information collected by the CPU module through the sensor to the cloud server through the wireless transmission network. The cloud server saves the data information to the cloud management center through communication. The cloud management center connects to the mobile device through communication. The APP of the mobile device downloads the information of the cloud management center and uploads the feedback information to the cloud management center. The feedback information is then transmitted to the CPU module, so that solenoid valve one, solenoid valve two, solenoid valve three, and the motor are started or stopped.

[0011] The wireless communication module is any one of a 5G communication module, a 4G communication module, a Bluetooth module, a WiFi module, a GSM module, a CDMA module, a CDMA module, a WCDMA module, a TD-SCDMA module, a Zigbee module and a LoRa module, or a combination of any of them.

[0012] The control unit is arranged in the control cavity of the increased safety explosion-proof box, and the switch power supply and the motor forward and reverse control module are arranged in the power cavity of the increased safety explosion-proof box.

[0013] The emergency shutoff signal is a normally closed contact provided to the upstream device.

[0014] It also includes an oil tank, a support frame, a motor, a gear pump, an accumulator, an actuator cylinder, a valve position sensor, an oil level sensor, a pressure sensor, a temperature sensor, and a hydraulic circuit. The motor is used to drive the gear pump to pump the hydraulic oil in the oil tank into the accumulator. The hydraulic circuit includes solenoid valve 1, solenoid valve 2, and solenoid valve 3. Solenoid valve 1 is used to drive the valve opening oil circuit, and the valve opening oil circuit is used to push the piston rod of the actuator cylinder to move so that the valve opens. Solenoid valve 2 is used to drive the fast closing oil circuit, and the fast closing oil circuit is used to push the piston rod of the actuator cylinder to move so that the valve closes. Solenoid valve 3 is used to drive the slow closing oil circuit, and the slow closing oil circuit is used to push the piston rod of the actuator cylinder to move so that the valve closes.

[0015] The oil tank is provided with an oil level sensor, the actuator cylinder is provided with a valve position sensor, the pressure sensor is arranged at the output end of the gear pump, the temperature sensor is used to detect the ambient temperature, and the pressure sensor, the temperature sensor, the valve position sensor, and the oil level sensor are connected to the control unit.

[0016] Solenoid valve 1 and solenoid valve 2 are energized conduction solenoid valves, and solenoid valve 3 is a de-energized conduction solenoid valve.

[0017] The control unit is PLC.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. Start and stop the equipment individually through the HMI human-machine interaction screen, which is simple and intuitive to operate;

[0020] 2. The opening solenoid valve, closing solenoid valve, ESD emergency solenoid valve, motor, valve position sensor, oil level sensor, temperature sensor, and pressure sensor are connected to the control unit. Maintenance personnel can check the equipment operation status and alarm prompts at any time through the HMI human-machine interaction screen. The operation is simple, maintenance is convenient, and time-saving and labor-saving;

[0021] 3. The cloud server is used to receive the data information of the sensor collected by the CPU module and transmit it to the cloud management center. The cloud management center sends instructions to the CPU module to make the device take corresponding actions. The number of connecting cables is small, the cost is low, the operation is simple, and it is easy to implement;

[0022] 4. The control unit is connected with the sensor and wireless communication module to monitor the sensor data information in real time, and send out alarm signals in time to remind the operators, thus improving the safety of operation;

[0023] 5. Download the information of the cloud management center through the APP of the mobile device, and upload the feedback information to the cloud management center in real time, which is easy to operate;

[0024] 6. The CPU module is connected to the corresponding solenoid valve through the relay group to prevent the solenoid valve from short-circuiting and damaging the CPU module;

[0025] 7. The control unit is arranged in the control cavity of the increased safety explosion-proof box, and the switching power supply and the motor forward and reverse control module are arranged in the power cavity of the increased safety explosion-proof box. The control unit can be arranged separately from the switching power supply and the motor forward and reverse control module, which improves the safety of the control unit operation and avoids the control unit being affected by other interference signals on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the principle of the control device of the valve electro-hydraulic actuator.

[0027] Figure 2 It is the front view of the electro-hydraulic actuator.

[0028] Figure 3 It is a side view of the electro-hydraulic actuator.

[0029] Figure 4 It is the front view of the electro-hydraulic actuator with valve.

[0030] Figure 5 It is a side view of an electro-hydraulic actuator with a valve.

[0031] Figure 6 It is a schematic diagram of the hydraulic circuit.

[0032] Figure 7 It is a valve control flow chart.

[0033] Figure 8 It is a schematic diagram of the structure of the increased safety explosion-proof box.

[0034] In the figure: 1- oil tank 2- support frame 3- motor 4- hot melt device 5- gear pump 6- accumulator 7- oil circuit block 8- valve position sensor 9- oil level sensor 10- pressure sensor 11- actuator cylinder 12- oil tank cover 13- ESD emergency action solenoid valve 14- closing action solenoid valve 15- opening action solenoid valve 16- valve 17- piston rod 18- connecting piece 21- valve stem 53- gear pump check valve 54- temperature sensor 55- increased safety explosion-proof box 57- control chamber 58- power chamber 71- closing action hydraulic control check valve one 72- closing action hydraulic control check valve two 73- opening action hydraulic control check valve one 74- opening action hydraulic control check valve two 75- ESD action hydraulic control check valve one 76- ESD action hydraulic control check valve two 77- Hydraulic main circuit balancing valve 1 78-Hydraulic main circuit balancing valve 2 81-Gear pump overflow valve 91-Accumulator isolation stop valve 92-Accumulator pressure relief stop valve 93-Accumulator overflow valve 95-Opening speed regulating throttle valve 96-Closing speed regulating throttle valve 97-ESD speed regulating throttle valve 101-ESD emergency action solenoid valve oil inlet 102-ESD emergency action solenoid valve oil outlet 201-Opening action hydraulic control one-way valve one oil inlet 202-Opening action hydraulic control one-way valve one oil outlet 203-Opening action hydraulic control one-way valve one control oil port 301-Hydraulic circuit return oil port 302-Hydraulic circuit closing oil port 303-Accumulator working oil port 304-Accumulator pressure relief oil port 308-Opening action hydraulic control one-way valve control oil circuit. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0036] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0037] [Example 1]

[0038] See Figure 1, a control device for a valve electro-hydraulic actuator, including a control unit, the control unit including a CPU module, an analog input module, an HMI human-machine interaction screen, a communication module one, a communication module two, and a wireless communication module, the communication module one is connected to the HMI human-machine interaction screen, and the communication module two is connected to the engineer station; the wireless communication module uploads the data information collected by the CPU module through the sensor to the cloud server through the wireless transmission network, the cloud server saves the data information to the cloud management center through communication, the cloud management center connects to the mobile device through communication, the APP of the mobile device downloads the information of the cloud management center, and uploads the feedback information to the cloud management center, and then the feedback information is transmitted to the CPU module, so that the solenoid valve one, the solenoid valve two, the solenoid valve three, and the motor are started or stopped; the wireless communication module is any one of a 5G communication module, a 4G communication module, a Bluetooth module, a WiFi module, a GSM module, a CDMA module, a CDMA module, a WCDMA module, a TD-SCDMA module, a Zigbee module, and a LoRa module, or a combination of any several of them. The digital output port Q1.0 of the CPU module is connected to the digital input port IN+ of the motor 3 forward and reverse control module, the three-phase power output terminals A2, B2, and C2 of the motor 3 forward and reverse control module are connected to the motor 3, and the three-phase power input terminals R, S, and T of the motor 3 forward and reverse control module are connected to the AC power supply AC380V. The CPU issues a start command to enable the motor 3 forward and reverse control module to drive the motor 3 to rotate. The motor 3 forward and reverse control module can adopt the announcement number CN206060611U, and the name is "three-phase AC motor 3 forward and reverse control module with output interlocking function", or other models can be used; the digital output ports Q0.0~Q0.6 of the CPU module are respectively connected to the coils of the relay group, and the relay group includes seven relays. The CPU module issues command information to activate the seven relays of the relay group to realize the mode status signal, the mechanism comprehensive fault alarm signal, the open position signal, The closed position signal, low oil level alarm signal, accumulator 6 low pressure alarm signal, and accumulator 6 comprehensive alarm signal are transmitted to the upstream or downstream equipment to participate in the interlocking action; the analog input module is connected to the valve position sensor 8, temperature sensor 54, oil level sensor 9, and pressure sensor 10 through ports AI0~AI3 respectively; the digital output ports Q1.1~Q1.3 of the CPU module are connected to the coils of the open relay, fast closing relay, and slow closing relay respectively, the normally open contact 1 of the open relay is connected to the open action solenoid valve 15, the normally open contact 1 of the fast closing relay is connected to the closing action solenoid valve 14, the emergency cut-off signal is the normally closed contact provided by the upstream equipment, the emergency cut-off signal is connected to the coil of the ESD relay, the normally open contact of the slow closing relay and the normally open contact of the ESD relay are connected in series, and then connected to the ESD emergency action solenoid valve 13; the CPU module, communication module, and analog input module are connected through ports; see Figure 8The control unit is arranged in the control chamber 57 of the increased safety explosion-proof box 55. Figure 8 The switching power supply, the forward and reverse control module of the motor 3, and the battery are arranged in the power chamber 58 of the increased safety explosion-proof box 55. The control unit is a PLC. The increased safety explosion-proof box 55 can be arranged on the support frame of the valve electro-hydraulic actuator or outside the electro-hydraulic actuator.

[0039] See Figures 2 to 5 ,See Figure 7 The valve electro-hydraulic actuator includes an oil tank 1, a support frame 2, a motor 3, a gear pump 5, an accumulator 6, an actuator cylinder 11, a valve position sensor 8, an oil level sensor 9, a pressure sensor 10, a temperature sensor 54, a hydraulic circuit, a hot melt device 4, and a switching power supply. The hydraulic circuit includes an opening action solenoid valve 15, a closing action solenoid valve 14, and an ESD emergency action solenoid valve 13. The pressure sensor 10 is used to detect the filling pressure in the accumulator 6. The motor 3 is used to drive the gear pump 5 to pump the hydraulic oil in the oil tank 1 into the accumulator 6. The input of the switching power supply The first end is connected to the AC power supply AC220V, and the second input end of the switching power supply is connected to the battery. When a power outage occurs, the battery is used to provide power for the control unit, and the switching power supply is used to provide working power. The upper part of the support frame 2 is provided with an actuator cylinder 11 and an oil tank 1, and the lower part of the support frame 2 is provided with a motor 3, an opening action solenoid valve 15, a closing action solenoid valve 14, an ESD emergency action solenoid valve 13, and a gear pump 5. The side of the support frame 2 is provided with an accumulator 6. The piston rod 17 of the actuator cylinder 11 is connected to the valve stem 2 of the valve 16 through a connector 18. 1 connection, an oil level sensor 9 is provided on the oil tank cover 12, and the oil level sensor 9 is used to detect the oil level of the oil tank 1, and the actuator cylinder 11 is provided with a valve position sensor 8 for detecting the valve position; the opening action solenoid valve 15 is used to drive the valve opening oil circuit, and the valve opening oil circuit is connected, so that the hydraulic oil in the accumulator 6 pushes the piston rod 17 of the actuator cylinder 11 to move through the valve opening oil circuit, and the valve 16 is opened; the closing action solenoid valve 14 is used to drive the fast closing oil circuit, and the fast closing oil circuit is connected, so that the hydraulic oil in the accumulator 6 pushes the piston rod 17 of the actuator cylinder 11 to move through the fast closing oil circuit, Valve 16 is closed: the ESD emergency action solenoid valve 13 is used to drive the slow closing oil circuit. The slow closing oil circuit is connected, so that the hydraulic oil in the accumulator 6 pushes the piston rod 17 of the actuator cylinder 11 to move through the slow closing oil circuit, and the valve 16 is closed; the gear pump 5 is a bidirectional gear pump 5, and the opening action solenoid valve 15, the ESD emergency action solenoid valve 13, and the closing action solenoid valve 14 are all pilot solenoid valves. The opening action solenoid valve 15 and the closing action solenoid valve 14 are energized and connected, and the ESD emergency action solenoid valve 13 is de-energized and connected; the accumulator 6 is a piston accumulator 6.

[0040] Working process:

[0041] Working principle of ESD relay: The slow closing oil circuit is opened by actuating the slow closing command button of the HMI human-machine interaction screen, and the slow closing oil circuit can also be opened by actuating the emergency cut-off button of the HMI human-machine interaction screen.

[0042] The temperature sensor 54 can measure the ambient temperature in real time. The warning temperature of the temperature sensor 54 is set lower than the melting temperature of the hot melt device 4. The warning temperature of the temperature sensor 54 is 50°C. When the ambient temperature is greater than or equal to 50°C, the PLC issues a high ambient temperature warning. The temperature sensor 54 can immediately issue a warning when it reaches the warning temperature.

[0043] [Example 2]

[0044] In this embodiment, a control device for a valve electro-hydraulic actuator is the same as that in Embodiment 1, on the basis of which a hydraulic circuit is added. Figure 6 The hydraulic circuit includes an opening solenoid valve 15, an ESD emergency solenoid valve 13, and a closing solenoid valve 14. The oil outlet of the ESD emergency solenoid valve 13 is connected to the control oil outlet of the ESD action hydraulic control check valve 1 75 and the control oil outlet of the ESD action hydraulic control check valve 2 76 through pipelines. The oil outlet of the opening solenoid valve 15 is connected to the control oil outlet of the opening hydraulic control check valve 1 73 and the control oil outlet of the opening hydraulic control check valve 2 74 through pipelines. The oil outlet of the closing solenoid valve 14 is connected to the control oil outlet of the closing hydraulic control check valve 1 The control oil port of valve 1 71 and the control oil port of closing action hydraulically controlled one-way valve 2 72 are connected through pipelines; the pressure sensor 10 is arranged at the input end of the accumulator 6, the temperature sensor 54 is used to detect the ambient temperature, and the pressure sensor 10 and the temperature sensor 54 are connected to the control unit; the accumulator 6 is connected to the accumulator working oil port 303 of the hydraulic circuit, the rod chamber of the actuator cylinder 11 is connected to the hydraulic circuit return oil port 301, the rodless chamber of the actuator cylinder 11 is connected to the hydraulic circuit closing oil port 302, and the oil tank 1 is connected to the accumulator pressure relief oil port 304 of the hydraulic circuit.

[0045] Working process:

[0046] The electro-hydraulic actuator drives valve 16 to open: PLC receives the valve opening command, the opening relay drives the opening solenoid valve 15 to be energized, and the valve opening oil circuit is connected. The hydraulic oil in the accumulator 6 drives the opening hydraulic control one-way valve 1 73 and the opening hydraulic control one-way valve 2 74 to open through the opening solenoid valve 15. The hydraulic oil in the accumulator 6 enters the rodless chamber of the actuator cylinder 11 through the opening hydraulic control one-way valve 1 73 and the hydraulic main circuit balancing valve 2 78, pushing the piston rod 17 of the actuator cylinder 11 to move, so that the valve 16 is opened. At the same time, the hydraulic oil in the rod chamber of the actuator cylinder 11, under the action of the piston, passes through the hydraulic main circuit balancing valve 1 77 and the opening hydraulic control one-way valve 2 78. Valve 2 74 and closing speed regulating throttle valve 95 return to oil tank 1; electro-hydraulic actuator drives valve 16 to close: PLC receives valve closing command, valve 16 is a two-stage action, first quickly closes to a certain valve position, and then slowly closes; fast closing: the fast closing relay drives the closing action solenoid valve 14 to be energized, the ESD emergency action solenoid valve 13 loses power, the fast closing oil circuit and the slow closing oil circuit are both connected, fast closing oil circuit: the hydraulic oil in the accumulator 6 drives the closing action hydraulic control check valve 1 71 and the closing action hydraulic control check valve 2 72 to open through the closing action solenoid valve 14, the hydraulic oil in the accumulator 6 enters the rodless chamber of the actuator cylinder 11 through the closing action hydraulic control check valve 1 71 and the hydraulic main circuit balance valve 1 77, and pushes The piston rod 17 of the actuator cylinder 11 moves, so that the valve 16 is closed. At the same time, the hydraulic oil in the rod chamber of the actuator cylinder 11 returns to the oil tank 1 through the hydraulic main circuit balance valve 2 78, the closing action hydraulic control one-way valve 2 72, and the closing speed regulating throttle valve 96 under the action of the piston; slow closing: the ESD emergency action solenoid valve 13 loses power, the closing action solenoid valve 14 loses power, the fast closing oil circuit is closed, and the slow closing oil circuit is connected. Slow closing oil circuit: the hydraulic oil in the accumulator 6 drives the ESD action hydraulic control one-way valve 1 75 and the ESD action hydraulic control one-way valve 2 76 to open through the ESD emergency action solenoid valve 13, and the hydraulic oil in the accumulator 6 ESD action hydraulic control one-way valve 1 75 and the hydraulic main circuit balance valve A 77 enters the rodless chamber of the actuator cylinder 11, pushing the piston rod 17 of the actuator cylinder 11 to move, so that the valve 16 is closed. At the same time, the hydraulic oil in the rod chamber of the actuator cylinder 11 is returned to the oil tank 1 through the hydraulic main circuit balance valve 2 78, the ESD action hydraulic control one-way valve 2 76, and the ESD speed control throttle valve 97 under the action of the piston; the emergency cut-off signal provided by the upstream equipment controls the conduction and closure of the slow closing oil circuit: when there is no fault in the upstream equipment and the emergency cut-off signal is closed, the slow closing relay drives the ESD emergency action solenoid valve 13 to connect or close the slow closing oil circuit; when the upstream equipment fails and the ESD signal is disconnected, the ESD emergency action solenoid valve 13 loses power, making the slow closing oil circuit conductive.

[0047] The utility model uses the HMI human-machine interaction screen to start and stop the device, which is simple and intuitive to operate; the opening action solenoid valve, closing action solenoid valve, ESD emergency action solenoid valve, motor, valve position sensor, oil level sensor, temperature sensor, and pressure sensor are connected to the control unit, and the maintenance personnel can check the equipment operation status and alarm prompts at any time through the HMI human-machine interaction screen. The operation is simple, maintenance is convenient, and time and labor are saved; the cloud server is used to receive the data information of the sensor collected by the CPU module and transmit it to the cloud management center, and the cloud management center sends instructions to the CPU module to make the equipment take corresponding actions. The number of connecting cables is small, the cost is low, the operation is simple, and it is easy to implement; the control unit and the sensor are used The sensor and wireless communication module are connected to monitor the sensor data information in real time, and the alarm signal is promptly issued to remind the operator to improve the safety of the operation; the information of the cloud management center is downloaded through the APP of the mobile device, and the feedback information is uploaded to the cloud management center in real time, which is easy to operate; the CPU module is connected to the corresponding solenoid valve through the relay group to prevent the solenoid valve from short-circuiting and damaging the CPU module; the control unit is arranged in the control cavity of the increased safety explosion-proof box, and the switching power supply and the motor forward and reverse control module are arranged in the power cavity of the increased safety explosion-proof box, which can separate the control unit from the switching power supply and the motor forward and reverse control module, thereby improving the safety of the operation of the control unit and avoiding the control unit from being affected by other interference signals on site.

Claims

1. A control device for a valve electro-hydraulic actuator, characterized in that: It includes a switching power supply and a control unit. The input end of the switching power supply is connected to a battery. The switching power supply is used to provide a working power supply. The control unit includes a CPU module and an analog input module. The digital output port of the CPU module is respectively connected to the digital input port of the motor forward and reverse control module and the coil of the relay group. The three-phase power output end of the motor forward and reverse control module is connected to the motor; the analog input module is connected to the valve position sensor, the oil level sensor, the pressure sensor, and the temperature sensor through the port; The relay group includes relay 1, relay 2, and relay 3. The emergency cut-off signal is connected to the coil of the ESD relay. Branch 1 is connected to solenoid valve 3. Branch 1 includes the normally open contacts of relay 3 and the normally open contacts of the ESD relay connected in series. Normally open contact 1 of relay 1 is connected to solenoid valve 1, and normally open contact 1 of relay 2 is connected to solenoid valve 2.

2. A control device for a valve electro-hydraulic actuator according to claim 1, characterized in that: The control unit also includes a communication module, an HMI human-machine interaction screen, and a wireless communication module. The CPU module, the analog input module, and the communication module are connected through ports. The communication module is connected to the HMI human-machine interaction screen, and the CPU module is connected to the wireless communication module. The wireless communication module uploads the data information collected by the CPU module through the sensor to the cloud server through the wireless transmission network. The cloud server saves the data information to the cloud management center through communication. The cloud management center connects to the mobile device through communication. The APP of the mobile device downloads the information of the cloud management center and uploads the feedback information to the cloud management center. The feedback information is then transmitted to the CPU module, so that solenoid valve one, solenoid valve two, solenoid valve three, and the motor are started or stopped.

3. A control device for a valve electro-hydraulic actuator according to claim 2, characterized in that: The wireless communication module is any one of a 5G communication module, a 4G communication module, a Bluetooth module, a WiFi module, a GSM module, a CDMA module, a WCDMA module, a TD-SCDMA module, a Zigbee module and a LoRa module, or a combination of any of the above.

4. A control device for a valve electro-hydraulic actuator according to claim 1, characterized in that: The control unit is arranged in the control cavity of the increased safety explosion-proof box, and the switch power supply and the motor forward and reverse control module are arranged in the power cavity of the increased safety explosion-proof box.

5. The control device of a valve electro-hydraulic actuator according to claim 1, characterized in that: The emergency cut-off signal is a normally closed contact provided by the upstream device.

6. The control device of a valve electro-hydraulic actuator according to claim 1, characterized in that: It also includes an oil tank, a support frame, a motor, a gear pump, an accumulator, an actuator cylinder, a valve position sensor, an oil level sensor, a pressure sensor, a temperature sensor, and a hydraulic circuit. The motor is used to drive the gear pump to pump the hydraulic oil in the oil tank into the accumulator. The hydraulic circuit includes solenoid valve 1, solenoid valve 2, and solenoid valve 3. Solenoid valve 1 is used to drive the valve opening oil circuit, and the valve opening oil circuit is used to push the piston rod of the actuator cylinder to move so that the valve opens. Solenoid valve 2 is used to drive the fast closing oil circuit, and the fast closing oil circuit is used to push the piston rod of the actuator cylinder to move so that the valve closes. Solenoid valve 3 is used to drive the slow closing oil circuit, and the slow closing oil circuit is used to push the piston rod of the actuator cylinder to move so that the valve closes. The oil tank is provided with an oil level sensor, the actuator cylinder is provided with a valve position sensor, the pressure sensor is used to detect the oil filling pressure in the accumulator, the temperature sensor is used to detect the ambient temperature, and the pressure sensor, temperature sensor, valve position sensor and oil level sensor are connected to the control unit.

7. A control device for a valve electro-hydraulic actuator according to claim 6, characterized in that: Solenoid valve 1 and solenoid valve 2 are energized conduction solenoid valves, and solenoid valve 3 is a de-energized conduction solenoid valve.

8. The control device of a valve electro-hydraulic actuator according to claim 1, characterized in that: The control unit is a PLC.

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