Discover the complete technical overview of GSHZ and GSHP rotary mechanical grilles. Learn about their operating principles, precise installation steps, and crucial maintenance protocols for optimal water treatment efficiency.
Introduction
In modern water supply and drainage engineering, the GSHZ series rotary mechanical grille is widely used to intercept floating debris or separate solids, thereby ensuring water quality and the safety of subsequent processes. Understanding the mechanical nuances of these systems is critical for seamless integration and long-term reliability.
Core Advantages & Features
When evaluating mechanical bar screens for industrial or municipal applications, this series stands out due to several distinct engineering advantages:
- Compact structure for adaptable facility integration.
- Convenient installation and commissioning.
- High degree of automation.
- Continuous debris removal without clogging, thorough discharge, and excellent separation performance.
Operating Principles:
GSHZ vs. GSHP Models Understanding the distinct mechanisms of our primary models ensures you select the right equipment for your facility's flow dynamics.
- Model GSHZ (Rotary Type): This unit features specially shaped rake teeth made of ABS engineering plastic, nylon, or stainless steel, assembled onto a shaft to form a drum-type rake assembly. The lower section is installed in the inlet channel. When the drive system rotates the sprocket at a constant speed, the rake sprocket moves upward, lifting solid debris out of the liquid. The liquid flows through the gaps between the rake teeth continuously. When reversing direction at the top, a relative self-cleaning motion occurs between front and rear rows of rake teeth, allowing debris to detach under gravity. Additionally, a rotary brush behind the unit ensures thorough cleaning of each row.
- Model GSHP (Rake Type): Driven by the motor and decelerated via a reducer, the sprocket wheel and chain move. Debris-removing teeth fixed on the rotating chain carry it from behind the bar screen down to the bottom, then flip over the guide wheel to the upstream position. The chain continues moving upward through the clearance between fixed bars, lifting intercepted debris above the water surface. Upon reaching the discharge outlet, the chain automatically flips, discharging the debris onto a downstream conveyor or sludge bucket.
Critical Installation Guidelines
To guarantee equipment longevity, installation must be executed by technically qualified personnel. Strict adherence to these baseline requirements is mandatory:
- Perform a 30-minute power-on test run before installation to check for potential transmission derailment during transportation.
- Before lifting, check whether the foundation plane and base plane are level; the leveling error must not exceed 5 mm. Verify that foundation dimensions match the base frame dimensions.
- Before connecting the power supply, insert a wrench into the motor tail square hole and manually rotate the motor to ensure no abnormal noise exists.
- Test the reducer's rotation direction; reverse rotation is strictly prohibited.
- Check whether the lubricating oil level in the reducer reaches the oil level line, and add No. 30 machine oil if insufficient.
Electrical Control Specifications
- Rated voltage is 380 V, and grounding resistance must be less than 4 Ω for safe operation.
- If the electrical control cabinet is designed for outdoor use, its protection rating must be IP55.
- User-fabricated control cabinets must include an overload protection relay.
Routine Maintenance & Troubleshooting
Proactive maintenance prevents costly downtime.
- The mechanical bar screen shall be serviced once every six months.
- During normal machine operation, inject calcium grease into each lubrication point using a grease gun every two months.
- Common Fault: The motor operates normally, but the rake teeth do not rotate.
- Troubleshooting: This is usually caused by equipment overload resulting in the shearing of the overload safety pin. Remove the safety cover, replace the overload safety pin , and clear any debris jamming the drag chain before restarting
