CN2921348Y

CN2921348Y - Water turbine set in hydropower station for dry season use

Info

Publication number: CN2921348Y
Application number: CNU2006200350044U
Authority: CN
Inventors: 秦天代
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-20
Filing date: 2006-07-20
Publication date: 2007-07-11
Anticipated expiration: 2016-07-20

Abstract

The utility model discloses a water turbine set in hydropower station for dry season use At least one hydroelectric generating set drops a certain altitude from normal installation position, which increases water head relatively while potential energy of water reduces little. The utility model maintains efficiency of power generation during low water season, reducing little static energy of water.

Description

The water wheels unit that use dry season in the water power plant

Affiliated field

The utility model relates generally to a kind of device that utilizes the work done of water energy, the water wheels unit that use dry season in particularly a kind of water power plant.

Background technique

Developed by people in distributing thousands of river, streams, part of occurring in nature.Usual way is to select suitable landform, builds a dam on the river course and dams, and retaining Cheng Ku forms head, is building the water wheels machine room at the bottom of the dam of opposite side or by penstock the water of reservoir is being guided in the water wheels machine room that is arranged on the riverbank, downstream.Through observing, most water wheels machine rooms all are arranged in the dam body, and the water wheels machine room has certain height poor from downstream sluicing river surface, height difference such in most big-and-middle-sized water power is more than 2 meters, many reaches more than 20 meter, especially big in the dry season, so the loss of head is in esse, promptly has the unspent phenomenon of waterpower resourses in the existing hydraulic facilities.Especially most basins dry seasons is very long, and by the setting in existing water power plant, generally all will reduce generated energy owing to come water to reduce dry season.But correspondingly improved the height of head owing to the reduction of downstream sluicing river surface dry season, and potential potential energy increases.In order to utilize this part water energy, the applicant has applied for a Chinese invention patent on May 11st, 2006, application number is 200610020808.1 and is called " a kind of hydraulic facilities utilize method and facility thereof " again, the falling-rising device that a kind of scheme promptly sets up an energy to rise or descend along with the downstream river course water surface is disclosed, the hydraulic generator unit is established in the falling-rising device, so that make full use of the potential energy that dry season, the head variation was increased.

Certainly set up movably that the falling-rising device is a solution, but be not unique, simpler and more direct way can be taked in some fixed power station, so that save reforming cost and other maintenance costs, the problem of therefore inquiring into this respect is useful.

Technology contents

The purpose of this utility model is to provide a kind of can overcome the known technology shortcoming, reduces improvement expenses, can improve the water wheels unit that use dry season in the water power plant of generating efficiency.

For achieving the above object, scheme of the present utility model is: with at least one group of water wheels unit height that descends from the normal mounting position.

Adopt such scheme, the water wheels unit that falls a setting height(from bottom) of beach decline is mainly used in and generates electricity standby dry season, the decline setting height(from bottom) has increased head relatively, though make water flow minimizing in dry season, increase with low water unit pressure, how much potential energy of water do not reduce, and kept generating efficiency, thereby realized the purpose of this utility model.

Below in conjunction with diagram and embodiment scheme is described in more detail.

Description of drawings

Fig. 1 is the front view of the water wheels unit that use dry season in the water power plant;

Fig. 2 is an A-A sectional view among Fig. 1.

Embodiment

Be illustrated in figure 1 as the front elevation of a conventional hydropower station, comprise dam body 1, and dam crest on building 2, the gate 3 of flows is regulated in several roads, and 4, one groups of water turbine of the overflow canal of being regulated are installed in the dam body 1, has identical reference for installation usually.Scheme by the design, with at least one group of water wheels unit height that descends from the normal mounting position, the present embodiment one group of water turbine that descended, from illustrated front, its water outlet 5 is low than the position of other several groups of water outlets 6, and having open channel 7 these water outlets of cooperation one, the outlet both sides have the husky wall of retaining (8) of certain altitude to form designated lane.

Fig. 2 is the cross-section cutaway view of dam body, and by diagram as can be known, with the water outlet 5 corresponding water wheels units 9 mounting points height that descends from the normal position, present embodiment descends 1 meter, and water intake and water outlet all should be provided with corresponding gate valve, with the switching of control channel.

The decline unit of present embodiment is mainly used in and uses dry season.When arrived dry season, because the underwater bed drawdown, open channel 7 may surface, thereby uses this unit generation, can obtain the normal big head of unit, thereby can obtain certain power benefit.According to measuring and calculating, if 12 meters of water level height overalls, a unit falls 1 meter can increase by 1/12nd generated energy in the dry season, if the resource in dry season is all noted developing in most water power plant, its overall benefit is considerable.

Claims

1, the water wheels unit that use dry season in a kind of water power plant is characterized in that: with at least one group of water wheels unit height that descends from the normal mounting position.

2, the water wheels unit that use dry season in a kind of water power plant according to claim 1, it is characterized in that: the unit of falling head has water outlet (5), and has one open channel (7) and cooperate this water outlet.