CN219875097U - Electrohydraulic actuator power supply circuit - Google Patents

Abstract

The utility model provides a power supply circuit for an electro-hydraulic actuator, which includes a power module and an external power supply. The external power supply is electrically connected to the power module. The power module includes an actuator working power supply, a control system power supply and a remote control power supply. The control system power supply supplies power to the PLC system, which includes a PLC system controller and a PLC system auxiliary control module. The power supply circuit for an electro-hydraulic actuator provided by the utility model saves a lot of costs compared with the existing technology that uses multiple groups of electro-hydraulic actuators or electro-hydraulic actuators installed in parallel with pneumatic actuators, electric actuators and manual actuators. Moreover, it can be controlled in different ways, and it can also ensure that there is no mutual interference. Especially if there is a problem with one of the communication or control mode components, the other channels can take over in time, and there is no need to provide backup power, ensuring the reliability of the control.

Description

Electrohydraulic actuator power supply circuit

Technical Field

The utility model relates to the technical field of electrohydraulic actuators, in particular to a power supply module of an electrohydraulic actuator.

Background

The electrohydraulic actuator is an actuating device which converts standard input signals into 0-90-degree angular displacement output moment or linear displacement output force corresponding to the input signals through electrohydraulic conversion and hydraulic amplification, and controls the displacement, speed and movement direction of the hydraulic cylinder by controlling the rotating speed and steering of the alternating current servo motor, so that high-thrust and high-speed movement control is realized.

Because the characteristics of quick response time, high sensitivity, compact mechanism, fire prevention and the like of the electrohydraulic actuator are often applied to chemical processing or transportation environments, the environments have extremely high requirements on fire safety, once accident consequences occur, a plurality of sets of standby equipment are generally adopted in an emergency shutdown link in order to solve the problems, so that other standby products can play a role in shutdown when one set fails, the cost of the equipment is increased, secondary production problems such as liquid leakage and the like are easy to occur, and long-term detection and maintenance are also not facilitated. In order to solve similar problems, patents such as a 202020646410.4 standby power supply control device of an electrohydraulic actuator and a 202023318809.9 novel electrohydraulic actuator in the prior art solve the problem of instantaneous tripping through power supply of a standby power supply, but the whole power is still cut off due to damage of parts in adjacent modules, which is not beneficial to continuous production control.

Disclosure of Invention

The embodiment of the utility model provides an electrohydraulic actuator power supply circuit which realizes the closing and the stopping of a safety valve by utilizing a multi-path respectively controlled mode, and the utility model is different from the existing multi-path communication control valve in that the utility model realizes independent power supply to different control means and control modes, thus realizing the technical effect that one path of circuit faults do not influence the normal operation of other equipment, and solving the problem of adding standby equipment by the multi-path communication control mode.

The embodiment of the utility model provides a power supply circuit of an electrohydraulic actuator, which comprises a power supply module and an external power supply, wherein the external power supply is electrically connected with the power supply module, the power supply module comprises an actuating mechanism working power supply, a control system power supply and a remote control power supply, the control system power supply supplies power to a PLC system, and the PLC system comprises a PLC system controller and a PLC system auxiliary control module.

In the utility model, the actuating mechanism working power supply is electrically connected with the electromagnetic valve switch and the speed regulating electromagnetic valve.

In the utility model, the remote control power supply is connected with the phase sequence detection module.

In the utility model, the remote control power supply is electrically connected with the remote input module.

In the utility model, the remote control power supply is electrically connected with the phase sequence adjusting module.

In the utility model, the remote control power supply is electrically connected with the knob or the motor.

In the utility model, the working power supply of the actuating mechanism is electrically connected with the sensor.

In the utility model, the control system power supply is also electrically connected with the display screen.

The electrohydraulic actuator power supply circuit provided by the utility model has the following advantages:

compared with the prior art, the electro-hydraulic actuator power supply circuit provided by the utility model has the advantages that a plurality of groups of electro-hydraulic actuators are adopted or are installed in parallel with the pneumatic actuator, the electric actuator and the manual actuator, so that a great amount of cost is saved, the electro-hydraulic actuator power supply circuit can be controlled in different modes, mutual interference can be avoided, and especially, when one path of communication or control mode components are in a problem, other paths can be replaced in time, so that the control reliability is ensured.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a power supply circuit of an electro-hydraulic actuator provided by an embodiment of the utility model;

FIG. 2 is a schematic block diagram of the power supply of the electro-hydraulic actuator according to the embodiment of the utility model;

fig. 3 is a wiring diagram of an electrohydraulic actuator control PLC system according to an embodiment of the present utility model.

In FIGS. 1-3, L-fire wire, N-zero wire, A3-actuator operating power, A4-control system power, A5-remote control power.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the power supply circuit of the electrohydraulic actuator provided by the embodiment of the utility model is respectively connected with a working power supply A3 of an actuator, a power supply A4 of a control system and a remote control power supply A5 of a zero line N and a live line L after being led in from an external 380V power supply. Then, the PLC system control module, the phase sequence detection module, the remote input module, the electromagnetic valve switch, the speed regulating electromagnetic valve, the phase sequence adjusting module, the knob or the motor and the sensor related to all the electrohydraulic actuators are divided into three types, the classified electrohydraulic actuators can realize the mutual independence of the actuating mechanism work, the control system and the remote control, and when one set of electrohydraulic actuators has a problem, the other two sets of electrohydraulic actuators can work normally and supplement each other.

The electromagnetic valve is an ESD electromagnetic valve.

In order to achieve the above functions, the control system power supply A4 of the present embodiment supplies power to a PLC system and a display screen, where the PLC system includes a PLC system controller and a PLC system auxiliary control module. The actuating mechanism working power supply A3 is electrically connected with the sensor, the ESD electromagnetic valve, the electromagnetic valve switch and the speed regulating electromagnetic valve. The remote control power supply A5 is electrically connected with the phase sequence detection module, the remote input module, the phase sequence adjustment module, the knob or the motor.

The PLC system controller of this embodiment assumes the main detection and control functions of the electro-hydraulic actuator, such as signal processing, feedback, detection of the position of the switch of the ESD solenoid valve, switch control of the ESD solenoid valve, and detection of 380V power failure, etc., but it is found through researches that these functions do not play a large role after power failure, and these modules are more related to other modules in the control system, if the control system is placed on the connecting line of the working power supply A3 of the actuator, the control failure rate is improved, if the control system detects that the power failure is detected and the detection of 380V power failure provides a warning, the remote control intervention can take over the operation to close the ESD solenoid valve soon, when both the remote control and the control system fail, the ESD solenoid valve needs to be turned off to go to the field according to other information, for example, after a fire disaster occurs, the components of the field control system fail at high temperature, the remote control end normally operates to close the valve, if the remote control end can open the ESD solenoid valve to reduce loss if the failure risk can be determined according to all signals, or the remote control end fails, the solenoid valve is automatically turned off when the working power supply of the actuator is required to perform manual valve opening control. In addition, when the remote control and the control system have no problem but are temporarily shut down, such as on-site maintenance, the electromagnetic valve is operated under the working power supply of the actuating mechanism.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (8)

1. The power supply circuit of the electrohydraulic actuator comprises a power supply module and an external power supply, wherein the external power supply is electrically connected with the power supply module.

2. The electro-hydraulic actuator power supply circuit according to claim 1, wherein the actuator working power supply is electrically connected with the solenoid valve switch and the speed regulating solenoid valve.

3. The electro-hydraulic actuator power circuit of claim 1, wherein the remote control power source is coupled to the phase sequence detection module.

4. The electro-hydraulic actuator power circuit of claim 3, wherein the remote control power source is electrically connected to the remote input module.

5. A power supply circuit for an electro-hydraulic actuator according to claim 3, wherein the remote control power supply is electrically connected to the phase sequence adjustment module.

6. The electro-hydraulic actuator power circuit of claim 1, wherein the remote control power source is electrically connected to a knob or motor.

7. The electro-hydraulic actuator power circuit of claim 1, wherein the actuator operating power source is electrically connected to the sensor.

8. The electro-hydraulic actuator power circuit of claim 1, wherein the control system power source is further electrically coupled to the display screen.