Straight-stroke explosion-proof integrated electro-hydraulic actuating mechanism

Abstract

The utility model discloses a straight-stroke explosion-proof integrated electro-hydraulic actuating mechanism which is composed of a hydraulic actuating unit, an explosion-proof hydraulic power unit, an explosion-proof electro-hydraulic unit and an explosion-proof operation and display unit which are integrally installed on a bottom plate. Straight stroke explosion-proof integrated control of the valve is achieved through electro-hydraulic combined control, the characteristics of high efficiency, safety and accurate control are combined, and the valve is particularly suitable for industrial application of high-torque hydraulic control in the flammable and explosive environment. Due to the integrated installation design of the components, the working efficiency and reliability of the system are improved, and strict safety requirements in a high-risk working environment are met.

Description

Technical Field

[0001] The utility model relates to the technical field of electro-hydraulic controlled valves, in particular to a linear explosion-proof integrated electro-hydraulic actuator. Background Art

[0002] Control valves are widely used in various applications of hydraulic systems due to their high efficiency, safety and precise control capabilities, such as hydraulic machinery, engineering machinery, aerospace equipment and hydraulic control systems in some special industrial environments. Existing valve drive devices mostly use electric devices, namely the so-called valve electric devices, but the shortcomings of valve electric devices, such as small output torque and slow switching speed, are becoming more and more obvious, and are becoming less and less suitable for critical energy and power pipelines. Therefore, there is an urgent need for a valve actuator that can be fully opened outdoors and used in factories with explosion hazards. Utility Model Content

[0003] In order to improve the response speed and output torque of a control valve, the utility model provides a linear explosion-proof integrated electro-hydraulic actuator.

[0004] The technical solution adopted by the utility model is as follows: a linear explosion-proof integrated electro-hydraulic actuator, comprising: a hydraulic actuator unit, comprising a hydraulic cylinder and a telescopic piston, the telescopic piston serving as a linear actuator component of a valve; an explosion-proof hydraulic power unit, comprising an oil tank, an explosion-proof motor and an oil pump, for providing hydraulic power for the hydraulic actuator unit; an explosion-proof electro-hydraulic unit, comprising an explosion-proof solenoid valve, a display pressure gauge, a hydraulic module and a hydraulic pipeline, for connecting the explosion-proof hydraulic power unit with the hydraulic actuator unit and controlling the flow direction and pressure of the hydraulic oil; an explosion-proof operation and display unit, comprising an explosion-proof operation box, an explosion-proof operation switch and an opening display, for operating the explosion-proof electro-hydraulic unit; the hydraulic actuator unit, the explosion-proof hydraulic power unit, the explosion-proof electro-hydraulic unit and the explosion-proof operation and display unit are integrated and installed on a base plate.

[0005] Preferably, the hydraulic actuator unit further comprises a travel guide rod and an explosion-proof interrogator, the travel guide rod moves axially with the telescopic piston, and the explosion-proof interrogator senses the position of the travel guide rod as a control signal source for the explosion-proof electro-hydraulic unit.

[0006] Preferably, the explosion-proof hydraulic power unit also includes a hydraulic manual pump.

[0007] Preferably, the oil tank is equipped with an air filter, an oil level sight glass and an oil suction filter.

[0008] Preferably, an overflow valve is also provided on the hydraulic pipeline of the explosion-proof electro-hydraulic unit.

[0009] Preferably, the explosion-proof electro-hydraulic unit is provided with a bidirectional hydraulic lock and a switch throttle valve on the hydraulic pipeline close to the hydraulic actuator unit.

[0010] Preferably, the explosion-proof electro-hydraulic unit is provided with a one-way valve on the hydraulic pipeline close to the side of the explosion-proof hydraulic power unit.

[0011] The utility model has the following beneficial effects: the utility model uses electric-hydraulic combined control to realize the straight-stroke explosion-proof integrated control of the valve, combines the characteristics of high efficiency, safety and precise control, and is particularly suitable for industrial applications of high-torque hydraulic control in flammable and explosive environments. The integrated installation design of its components not only improves the working efficiency and reliability of the system, but also meets the strict safety requirements in high-risk working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The hydraulic principle diagram of the embodiment of the utility model.

[0013] Figure 2 It is a left side schematic diagram of an embodiment of the utility model.

[0014] Figure 3 This is a front view schematic diagram of an embodiment of the utility model.

[0015] Hydraulic cylinder 101; telescopic piston 102; travel guide rod 103; explosion-proof interrogator 104;

[0016] Oil tank 201; explosion-proof motor 202; oil pump 203; hydraulic manual pump 204; air filter 205; oil level sight glass 206, oil suction filter 207;

[0017] Explosion-proof solenoid valve 301; display pressure gauge 302; hydraulic module 303; overflow valve 304; two-way hydraulic lock 305; switch throttle valve 306; one-way valve 307;

[0018] Explosion-proof operating box 401; explosion-proof operating switch 402; opening display 403;

[0019] Base plate 500. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the embodiments and drawings.

[0021] In the embodiment, Figures 1 to 3As shown, a linear explosion-proof integrated electro-hydraulic actuator includes: a hydraulic actuator unit, including a hydraulic cylinder 101 and a telescopic piston 102, the telescopic piston 102 serving as a linear actuator of a valve; an explosion-proof hydraulic power unit, including an oil tank 201, an explosion-proof motor 202 and an oil pump 203, for providing hydraulic power for the hydraulic actuator unit; an explosion-proof electro-hydraulic unit, including an explosion-proof solenoid valve 301, a display pressure gauge 302, a hydraulic module 303 and a hydraulic pipeline, for connecting the explosion-proof hydraulic power unit with the hydraulic actuator unit and controlling the flow direction and pressure of the hydraulic oil; an explosion-proof operation and display unit, including an explosion-proof operation box 401, an explosion-proof operation switch 402 and an opening display 403, for operating the explosion-proof electro-hydraulic unit; the hydraulic actuator unit, the explosion-proof hydraulic power unit, the explosion-proof electro-hydraulic unit and the explosion-proof operation and display unit are integrated and installed on a base plate 500. This embodiment uses electric-hydraulic combined control to achieve integrated control of the valve's linear travel explosion-proof type, combining the characteristics of high efficiency, safety and precise control, and is particularly suitable for industrial applications of high-torque hydraulic control in flammable and explosive environments. The integrated installation design of its components not only improves the system's work efficiency and reliability, but also meets the strict safety requirements in high-risk working environments.

[0022] In the embodiment, Figures 1 to 3 As shown, the hydraulic actuator unit also includes a travel guide rod 103 and an explosion-proof interrogator 104. The travel guide rod 103 moves axially with the telescopic piston 102, and the explosion-proof interrogator 104 senses the position of the travel guide rod 103 as a control signal source of the explosion-proof electro-hydraulic unit. The interrogator 17 serves as a control signal conversion device, so that the operator can control the explosion-proof solenoid valve 301 through a simple console or automation system.

[0023] In the embodiment, Figures 1 to 3 As shown, the explosion-proof hydraulic power unit also includes a hydraulic manual pump 204. The hydraulic manual pump 204 allows the operator to manually operate the system in the event of electric control failure or emergency. Through the hydraulic manual pump 204, the operator can manually inject hydraulic oil into the system to maintain or adjust the working pressure and flow of the system. During equipment commissioning, maintenance or emergency repair, the manual pump 204 provides a convenient method to control and adjust the operating state of the system. The operator can manually operate and maintain the system independently of the electro-hydraulic control system, thereby reducing system downtime and maintenance costs.

[0024] In the embodiment, Figures 1 to 3As shown, the oil tank 201 is equipped with an air filter 205, an oil level sight glass 206 and an oil suction filter 207. The function of the air filter 205 is to allow air to freely enter and exit the oil tank 1 to adjust the internal gas pressure and prevent the oil tank from generating vacuum or overpressure, which can effectively protect the hydraulic system from the influence of oil fluctuations and ambient temperature changes. The sight glass 206 is installed on the oil tank 1 to observe the cleanliness and liquid level of the oil in real time. Through the sight glass 206, the operator can directly check whether the oil is clean and whether the oil level is normal, so as to timely discover and solve potential oil contamination or abnormal liquid level problems.

[0025] In the embodiment, Figures 1 to 3 As shown, the hydraulic pipeline of the explosion-proof electro-hydraulic unit is also provided with a relief valve 304. The setting of the relief valve 304 can release excess hydraulic oil when the system pressure exceeds a preset value to prevent damage to the system or equipment due to overpressure. This safety measure ensures that the system can still maintain a stable and safe working state in unexpected situations.

[0026] In the embodiment, Figures 1 to 3 As shown, the explosion-proof electro-hydraulic unit is provided with a two-way hydraulic lock 305 and a switch throttle valve 306 on the hydraulic pipeline near the hydraulic actuator unit. The two-way hydraulic lock 305 is used to prevent the actuator in the system from moving or sliding under unexpected conditions, and can lock the actuator cylinder 5 in a specific position to prevent accidental movement due to pressure fluctuations or external interference, thereby ensuring the safety and stability of the system. The switch throttle valve 306 is used to adjust the flow and speed of the fluid in the hydraulic system. By adjusting the opening of the valve to control the flow size, the flow rate of the hydraulic oil in the system can be accurately adjusted, so that the system can maintain a stable operating state under different loads and working conditions, and improve the control accuracy and response speed of the system. The above hydraulic pipeline makes the system operation more convenient and intuitive, while reducing the maintenance cost. The operator can achieve precise control of the hydraulic system through simple adjustment and monitoring, and quickly respond to changes in various working conditions, effectively improving the work efficiency and operational flexibility of the system.

[0027] In the embodiment, Figures 1 to 3 As shown, the explosion-proof electro-hydraulic unit is provided with a one-way valve 307 on the hydraulic pipeline near the explosion-proof hydraulic power unit. The one-way valve 307 plays an important role in preventing the oil from flowing back, especially when the system is shut down or the system pressure fluctuates, the one-way valve 307 can prevent the hydraulic oil from flowing back to the oil pump and other components, effectively protecting the stability and safety of the system and preventing the hydraulic components from being damaged or malfunctioning due to the backflow.

[0028] The working principle and operation description of this embodiment are as follows:

[0029] 1. Local control

[0030] Turn the explosion-proof operation switch 402 on the explosion-proof operation box 401 to the "local" position.

[0031] 1.1. Open the valve

[0032] Press the "open" button on the explosion-proof operating switch 402, the explosion-proof motor 202 starts to drive the oil pump 203 to generate a high-pressure oil source, and the high-pressure oil source enters the rodless chamber of the actuator hydraulic cylinder 101. The telescopic piston 102 will open the valve at a set speed until it automatically stops opening the valve at the fully open position.

[0033] 1.2 Close the valve

[0034] Press the "off" button on the explosion-proof operation switch 402, the explosion-proof motor 202 runs to drive the oil pump 203 to generate a high-pressure oil source, the explosion-proof solenoid valve 301 is energized at the same time, the high-pressure oil source enters the rod chamber of the hydraulic cylinder 101, and the telescopic piston 102 will close the valve at a set speed until it automatically stops the valve closing action at the fully closed position. When the valve is in the fully closed position, the valve closing is invalid.

[0035] 1.3 Stop

[0036] When the valve is in the process of opening and closing, the stop button is pressed, the oil pump 203 and the explosion-proof solenoid valve 301 are both de-energized, and the valve stops at any intermediate position.

[0037] 2. Remote

[0038] Turn the explosion-proof operation switch 402 to the "remote" position, and the remote indicator light will light up. A switch command is issued in the central control room, and this command is connected to the local controller, and the valve is remotely controlled.

[0039] 3. Adjustment control

[0040] Turn the explosion-proof operation switch 402 to the "adjustment" position, and the adjustment indicator light will light up. A 4-20mA analog adjustment command is issued in the central control room, and this command is connected to the local controller. The valve changes according to the change of the analog 4-20mA command, thereby realizing the valve adjustment function.

[0041] 4. Manual Operation

[0042] When the power supply is lost, the valve can be opened and closed by shaking the hydraulic manual pump. The manual function is mainly used to debug the valve when there is no power supply, or to close the valve in emergency under special circumstances.

[0043] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A linear explosion-proof integrated electro-hydraulic actuator, characterized in that: include: A hydraulic actuator unit comprises a hydraulic cylinder (101) and a telescopic piston (102), wherein the telescopic piston (102) serves as a linear actuator component of a valve; An explosion-proof hydraulic power unit, comprising an oil tank (201), an explosion-proof motor (202) and an oil pump (203), and used to provide hydraulic power for the hydraulic actuator unit; An explosion-proof electro-hydraulic unit, comprising an explosion-proof solenoid valve (301), a display pressure gauge (302), a hydraulic module (303) and a hydraulic pipeline, for connecting the explosion-proof hydraulic power unit with the hydraulic actuator unit and controlling the flow direction and pressure of the hydraulic oil; An explosion-proof operation and display unit, comprising an explosion-proof operation box (401), an explosion-proof operation switch (402) and an opening display (403), and is used to operate the explosion-proof electro-hydraulic unit; The hydraulic actuator unit, the explosion-proof hydraulic power unit, the explosion-proof electro-hydraulic unit and the explosion-proof operation and display unit are integrally mounted on a base plate (500).

2. The linear explosion-proof integrated electro-hydraulic actuator according to claim 1, characterized in that: The hydraulic actuator unit further comprises a travel guide rod (103) and an explosion-proof interrogator (104); the travel guide rod (103) moves axially with the telescopic piston (102); the explosion-proof interrogator (104) senses the position of the travel guide rod (103) and serves as a control signal source for the explosion-proof electro-hydraulic unit.

3. The linear explosion-proof integrated electro-hydraulic actuator according to claim 1, characterized in that: The explosion-proof hydraulic power unit also includes a hydraulic manual pump (204).

4. The linear explosion-proof integrated electro-hydraulic actuator according to claim 1 or 3, characterized in that: The oil tank (201) is equipped with an air filter (205), an oil level sight glass (206) and an oil suction filter (207).

5. The linear explosion-proof integrated electro-hydraulic actuator according to claim 1, characterized in that: A relief valve (304) is also provided on the hydraulic pipeline of the explosion-proof electro-hydraulic unit.

6. The linear explosion-proof integrated electro-hydraulic actuator according to claim 1 or 5, characterized in that: The explosion-proof electro-hydraulic unit is provided with a bidirectional hydraulic lock (305) and a switch throttle valve (306) on a hydraulic pipeline close to a side of the hydraulic actuator unit.

7. The linear explosion-proof integrated electro-hydraulic actuator according to claim 1 or 5, characterized in that: The explosion-proof electro-hydraulic unit is provided with a one-way valve (307) on a hydraulic pipeline close to a side of the explosion-proof hydraulic power unit.

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