Stop log

Z-type series steel gates are essential water retention and sealing devices for water supply, drainage, water conservancy, and hydropower projects. Our company offers a comprehensive range suitable for all applications, categorized into five structural types, providing stable support for water flow control and water level regulation in water conservancy projects.

Stop log Product Introduction

Classification

Stop Plank Gate (CBZ Type): Three-edge sealing, with superior leak prevention, specifically designed for canal installations.

Water-Stop Gate (ZSZ Type): Submerged Gate, four-edge sealing, designed for canal or orifice-wall installations and operating heads ≤5m.

Stoplog Gate (DLZ Type): Suitable for occasions with less frequent use, channel installation, and block water flow.

Slide Gate (PGZ Type): It can withstand large water heads and has no restrictions on appearance specifications. It is widely used in water conservancy and hydropower projects as working gates, emergency gates, maintenance gates, etc.

Water Gate (SIZ Type): The external dimensions are relatively large. It can be made into push-turn type, horizontal pull type, single-leaf or double-leaf type, and is operated by electro-hydraulic push rod or winch. It is widely used in water conservancy projects such as flood discharge and river water exchange.

Model Indication and Material

Each type is marked with structural features, dimensions and other parameters. The material can be carbon steel or stainless steel, and some types can be made of ductile iron

Steel gate classification and model representation

Calculation of Hoisting Forces for Steel Gates and Selection of Hoisting Equipment

1. CBZ Type: Equipped with dedicated hoisting device. Only specify manual or electric operation; noneed to indicate hoist model separately.
2 .ZSZ Type: Calculate hoisting force according to the method for cast iron gates.3.
3.DLZ Type: Operated by electric single-girder crane (electric/manual chain hoist) with grab-releasemechanism. For gates with width ≤1.5m and suitable depth, hand-carry operation is allowed.
4. PGZ Type: Can be matched with our Q-Series hoists based on hoisting force, or use winchhoists/electric chain hoists with auto grab-release, Hoisting force must be calculated diferently based on hoisting force, or use winchhoists/electric chain hoists with auto grab-release, Hoisting force must be calculated differently basedon static water pressure conditions during gate opening:

Opening and closing by static water (such as some inspection gates without bypass waterdischarge system), the opening force is the deadweight of the gate body, and the closing force is not considered.

Dynamic water opening and closing (such as discharge gates and emergency gates), the openingand closing force is calculated based on the opening and closing of cast iron gates.

When large gates are subjected to high water pressure, a drain valve (water level balancingdevice) can be installed on the gate to reduce the opening and closing force. The water levels on bothsides can be balanced before the gate is opened. This type should be specified when ordering. itsopening and closing force is the same as above.

Application

Water Conservancy Projects: Pump Station, Canal, and Gate Maintenance
Pump stations, irrigation canals, and gates require regular equipment maintenance, gate repairs, and canal dredging. These operations necessitate temporary water shut-off and drainage. Stop logs can quickly block water flow, providing a safe working environment for maintenance work and are a core piece of equipment for temporary isolation in water conservancy projects.

Water Treatment Industry: Equipment Maintenance and System Isolation
Reaction tanks, sedimentation tanks, and filtration equipment in water treatment plants (waterworks, wastewater treatment plants) require regular maintenance, filter replacement, and equipment debugging. Stop logs precisely isolate water flow, preventing water pollution or disruption to other areas during maintenance.

Industrial Production: Pipeline and Equipment Maintenance
Maintenance of various water-related pipelines and production equipment (such as cooling systems and circulating water systems) requires temporary water shut-off to prevent water leakage that could contaminate production areas or damage the equipment being maintained.

Municipal Engineering: Pipeline and Landscape Facility Maintenance
The inspection and dredging of urban underground pipelines involves using stop logs to block water flow and drain the pipes, facilitating work such as dredging, repairing damage, and reinforcing joints. Maintenance of artificial lakes and landscape ponds in urban parks and squares involves temporarily blocking water with stop logs, draining the water, and then cleaning the ponds, inspecting facilities, and changing the water quality, without affecting the surrounding landscape or traffic. Routine maintenance of municipal pumping stations requires isolating the inlet channels to ensure safe maintenance of equipment within the pumping stations and guarantee the stable operation of the urban drainage and water supply systems.

Emergency Flood Control: Temporary Water Blocking and Sealing
During the flood season, when encountering torrential rains and floods, stop logs are used for rapid splicing to temporarily block the flow of water in rivers and drainage networks, preventing floodwaters from backflowing into cities, farmland, or industrial areas; in emergency response to urban flooding, stop logs are used to temporarily seal drainage outlets in severely flooded areas to control the spread of water and buy time for drainage operations; for temporary water blocking in small rivers and ditches, when fixed gates malfunction and cannot be closed, stacked beam gates can be used as a temporary substitute to achieve rapid water blocking and prevent the disaster from escalating.

Installation method

Installation Preparation: Clean the installation area of debris and silt, confirm the installation location dimensions, and prepare hoisting tools.

Guide Rail Installation:Fix the guide rails to the base, calibrate the verticality and spacing, ensure parallelism and compatibility with the stacked panels, reinforce with grease, and ensure smooth sliding of the stacked panels.

Stacked Panel Hoisting and Assembly:Use hoisting tools to hoist the stacked panels one by one, place them on the guide rails, and adjust for alignment, ensuring a tight fit at the bottom and no misalignment of the seals. Stack them to the corresponding height according to water blocking requirements.

Sealing and Pressure Valve Adjustment:Check the sealing between the stacked panels and between the stacked panels and the guide rails/base. Apply sealant for minor leaks, and replace damaged seals promptly. Install and adjust the pressure valve to ensure flexible operation and reliable sealing.

Installation Acceptance:Check the appearance for neat assembly and no looseness. Conduct a full-level water blocking test to confirm no significant leakage and normal function of the pressure valve.

Installation Precautions:Lifting should be done slowly, and workers should take protective measures; stacked plates should be precisely aligned to avoid poor sealing; seals should be compatible with the operating medium; outdoor installation should be avoided in severe weather, and anti-corrosion protection measures should be taken.