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BULKHEAD SLIDING GATE (INTAKE OR DOWNSTREAM GATE):
TYPICAL DESCRIPTION
(can be modified as per your needs)
PRINCIPLE
Bulkhead gate is used for turbine dewatering, enabling turbine repair or maintenance work. Bulkhead gate can be operated only when there is no water flow or hydrostatic pressure.
Structure
Generally, bulkhead gate is made in one section. Each section is a flat box-like structure constituted by one steel panel and horizontal beams spaced so each one is subjected to the same hydrostatic load. Vertical beams located on sides are used to transfer loads to embedded parts (fixed guides). When there are several sections, they are interconnected by tie rods with swivel ends, thus conferring t hem an individual freedom of movement.
Sliding surfaces
In order to facilitate bulkhead gate operation, it is equipped with sliding surfaces made of UHMW Polyethylene and located on sides.
Lateral stops
To avoid any possible jamming, gate is equipped with 4 lateral stops made of UHMW Polyethylene.
Watertightness
Watertightness system can be installed on upstream or downstream side of gate depending of site characteristics and customer preferences.
Generally, watertightness is ensured by Neoprene or rubber seals in the following way:
On sides: by "J" bulb seals.
On lintel: by "J" bulb seals.
On sill: by a flat type seal comprising appropriate chamfers.
Corners: Connections between different seals types are carefully done using appropriate cement.
Initial watertightness
When required, bulkhead gate is equipped with 4 springs that ensure an initial watertightness (when hydrostatic pressure is null). Springs go into action only when bulkhead gate is near closed position.
Frame (fixed guides)
Fixed guides include:
Sliding surfaces made of stainless steel.
Sliding surfaces for lateral stops.
Seating surfaces made of stainless steel for watertightness on both sides, lintel and sill.
Hollow beams containing heating cables (optional).
Heating system (optional)
Fixed guides can include two hollow beams along seating surfaces on both sides and into which are inserted heating cables. If required, an adequate heating of guides can be obtained using 500W/m heating elements.
Small balancing gate (optional)
In order to limit maneuvering loads at bulkhead gate opening, a small pressure balancing gate can be installed into bulkhead gate structure. By using a special device, bypass opens and closes automatically.
Note: Small balancing gate can be replaced by a bypass piping and valve which will give the same result.
Handling device (optional)
We design handling device according to our customer requirements. We can design systems with hydraulic cylinders, electric jacks, winches, hoists, jib crane, etc.
In all cases, handling device will be designed for the following two cases:
Opening at normal speed with wicket gates closed and without any hydrostatic pressure (same water level both sides of gates). Opening speed is controlled by handling device.
Closure at normal speed without any hydrostatic pressure and without any water flow (wicket gates closed). Closure speed is controlled by handling device.
Under no circumstances, bulkhead gate can be operated when there is any hydrostatic pressure or water flow.
To contact us :
Alain Scuvée, P. eng.
ABMS Consultants inc.
Phone: (450) 378-6963
39, rue de la Baie, Granby, QC
Fax: (450) 378-9421
J2J 0R2, Canada
Email:
ventes@abms.ca
ABMS Consultants Inc is a firm of consulting engineer offering of the services of engineering, mechanical design, 3D drawings and consultant in mechanical engineering field. ABMS Consultants is specialized hydroelectric turbine, slide gate, roller gate, flap gate, bulkhead gate, ASME pressure vessel, storage tank, swing bar, spreader, lifting device, trash rack, by-pass gate, dimple plates, babbit bearing, oil bearing, water bearing, heavy equipment and industrial equipment. ABMS Consultants offers services of mechanical design, technical support, refurbishing, modernization, optimization, expertise and diagnostic (failure analysis). ABMS Consultants offers also our services on site: mechanical engineering, technical support, supervision, inspection, project management, consultant, etc.
Last Modification:
All rights reserved © 2009, ABMS Consultants inc.
Company profile: In 2001, Alain Scuvée, mechanical engineer, founded ABMS Consultants Inc while resting on his experience of twenty years in mechanical design, management and product development in the field of hydroelectric turbines, ASME pressure vessels, gates and processors including nine as mechanical engineering manager. ABMS Consultants offers all services related to engineering: mechanical design, expertise, consulting, consultation, failure analysis, refurbishment, modernization, technical support, project follow-up, project management, computer-assisted drawing (CAD), writing of technical manual, translation (English / French). Our engineers are members of the ordre des ingénieurs du Québec (OIQ). Also, with our partners and on request of our customer, ABMS Consultants is able to offer a turn-key project. This service includes the design, manufacture, installation, all mechanical and hydraulic accessories, the control system of the equipment as well as startup and commissioning.
