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- Energy storage hydraulic control system with reliable energy monitoring
- Energy storage high-flow hydraulic forming system
- High-precision digital servo synchronous actuation system
- Energy storage high-flow electro-hydraulic servo test system
- Energy storage, large flow compensation and balance hydraulic control system
- High-frequency fatigue testing system
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Energy storage hydraulic control system with reliable energy monitoring
- Energy storage high-flow power source start-up system
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- Hydro-controlled system of electric furnace energy storage device power source
- Emergency control high-pressure accumulator power source for valves
- Governor energy storage power source electro-hydraulic control system
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Energy storage high-flow hydraulic forming system
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High-precision digital servo synchronous actuation system
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Energy storage high-flow electro-hydraulic servo test system
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Energy storage, large flow compensation and balance hydraulic control system
- High-frequency fatigue testing system
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Energy storage hydraulic control system with reliable energy monitoring
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Emergency Control High-Pressure Electro-Hydraulic Control System for Chemical Valves
Published Time:
2024-12-30 11:54
Category:
Solution
Energy‑storage hydraulically controlled system with reliable energy monitoring
Emergency control high-pressure accumulator power source for valves
Emergency control system for high-pressure electro-hydraulic control of chemical valves
The electro-hydraulic servo control system for chemical valves is a high-precision automated control device that integrates electrical signal control with hydraulic actuation. It receives electrical signals from the control system and, via an electro-hydraulic servo valve, converts these weak electrical signals into robust hydraulic power, enabling precise adjustment of the opening degree of large-diameter or high-pressure chemical valves and achieving rapid, accurate regulation of flow rate, pressure, and liquid level. SCHWERLL We provide accumulator control systems for valve‑block‑controlled electrohydraulic servo‑hydraulic systems, particularly piston‑type accumulator control systems equipped with emergency opening and closing functions and an energy monitoring and measurement system.
System Composition
- Controller : Process input commands and position feedback signals, and perform PID Operation.
- Electro-hydraulic servo valve : The core component that converts electrical signals into hydraulic oil flow and pressure.
- Hydraulic cylinder / Actuator A mechanical actuator that directly drives the valve stem to perform linear or rotary motion.
- Feedback sensor : Real-time monitoring of valve position or system pressure to implement closed-loop control.
- Hydraulic power source : Provides stable, clean high-pressure hydraulic fluid.
Working principle
- Signal reception The controller receives the valve opening command and compares it with the valve’s current position.
- Deviation Adjustment The deviation signal, after being amplified, drives the spool of the electro-hydraulic servo valve to move.
- Precise drive High-pressure oil flows into the hydraulic cylinder, driving the valve to reach the designated position quickly and accurately.
- Closed-loop feedback : Once the sensor confirms the position, the system ceases adjustment and maintains a stable state.
Key Features
- Fast response speed : Millisecond-level dynamic response, ideal for emergency shutoff and rapid regulation.
- High control accuracy Closed-loop feedback ensures precise valve positioning with no measurable error.
- High thrust output : Hydraulic drive offers high power, enabling it to overcome the substantial resistance posed by high-pressure, high-viscosity media in chemical processes.
- Safe and reliable : Typically equipped with fault protection ( Failsafe ) Function: In the event of a power or gas outage, it can automatically return to zero or shut off.
Application scenarios
- Large Compressor Anti-Surge Valve (such as TRT System and vent valve)
- Hydrocracking and Coal Chemicals High-pressure feed control valve in the system
- Ethylene Cracking Furnace Fuel gas and steam quick shut-off valve
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What are the causes of severe pressure drop and shortened service life in bladder-type accumulators?
What are the causes of severe pressure drop and short service life in bladder-type accumulators? The structure of a bladder-type accumulator is quite simple, consisting mainly of an oil chamber surrounding the bladder and a gas chamber equipped with a gas‑tight seal. During operation, the hydraulic fluid must be connected to the hydraulic circuit; when the system pressure rises, the fluid flows into the accumulator, compressing the gas until the pressure in the system pipeline stabilizes.
How can we reduce failures when an accumulator malfunctions?
If an accumulator malfunctions, its performance will be directly affected, potentially leading to abnormal pressures and system failure. Therefore, it should receive close attention during routine operation, and appropriate measures must be implemented to mitigate risks. So, how can we minimize failures when an accumulator malfunctions? The following sections address this issue.
Accumulators are intriguing components in hydraulic systems, analogous to capacitors in electrical circuits or springs in mechanical systems. As critical energy‑storage elements, they serve a variety of sophisticated functions, including hybrid‑power applications, shock absorption, pressure stabilization (and sometimes flow‑rate regulation), and the rapid release of stored energy to simulate impacts.
Is a bladder-type accumulator suitable for use in series with gas cylinders or cylinder banks?
1. Bladders typically have a shorter service life than piston‑type accumulators, and their quality varies significantly among different manufacturers. 2. Many factors can shorten a bladder’s lifespan and lead to rupture, including variations in the bladder’s intrinsic quality and durability; improper handling during assembly (e.g., failure to pre‑fill with fluid for lubrication); incorrect procedures during pre‑charging (e.g., insufficiently slow inflation); errors in calculating the pre‑charge pressure; oil‑port flow velocities approaching or exceeding 7 m/s; single‑stroke reciprocation times of 10 seconds or less when used for energy storage; collisions between the bladder and check valves during operation; large temperature fluctuations (including significant seasonal differences); prolonged lateral vibration; fluid‑induced corrosion; and inertial impacts from minute solid contaminants in the working medium, among others.
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