CN203960825U - A kind of waterpower self-control one-way check panel turnover mechanism - Google Patents
A kind of waterpower self-control one-way check panel turnover mechanism Download PDFInfo
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- CN203960825U CN203960825U CN201420388865.5U CN201420388865U CN203960825U CN 203960825 U CN203960825 U CN 203960825U CN 201420388865 U CN201420388865 U CN 201420388865U CN 203960825 U CN203960825 U CN 203960825U
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Abstract
The utility model discloses a kind of waterpower self-control one-way check panel turnover mechanism.For realizing simply and easily hydraulic power plant surge-chamber one-way check impedance hole current one-way check, accelerate the object of decay water pressure fluctuations.Described waterpower self-control one-way check panel turnover mechanism comprises the structures such as the embedded part that is arranged on surge-chamber cover plate, a free bearing, reverse turning bed structure, buffer.Embedded part is fixing for a free bearing and concrete surge-chamber cover plate processed, and a free bearing and reverse turning bed structure are hinged, and is fixed on a side in one-way check impedance hole; Reverse turning bed structure utilizes lever principle, in impedance hole, one side is established turnover panel, the other end is established bascule, utilizes the surge-chamber differential water pressures that current variation in water pressure causes up or down to realize the upset of mechanism, makes turnover panel with the laminating of surge-chamber cover plate or separates and realize closing or opening of one-way check impedance hole.The utility model utilizes opening or closing of hydraulic automatism control one-way check impedance hole, simple in structure, safe and reliable.
Description
Technical field
The utility model relates to a kind of waterpower self-control one-way check panel turnover mechanism, belongs to hydraulic power plant surge-chamber water-level fluctuation energy dissipating field.
Background technology
Have in the power station of low water head, large flow, long water-carriage system feature in China, calculate according to the holder horse formula of recommending in DL/T5058--1996 " hydraulic power plant surge-chamber design specifications ", surge-chamber stable cross section area is very large.Build large-area surge-chamber like this, not only engineering quantity is large, constructional difficulties, and also unfavorable to the stability of slope of factory building section to surge-chamber, need larger protective reinforcing engineering quantity.While normally operation due to this type of power station, may there is less sudden load variations, the change that the hydraulic turbine is quoted flow will cause the fluctuation of surge-chamber water level, if surge-chamber is too small, water pressure fluctuations is difficult to decay to as early as possible stable state, also can increase spiral case maximum pressure and unit maximum (top) speed climbing, be unfavorable for machine unit scheduling operation.Because proposing again in the industry that one-way check impedance hole is set on small size surge-chamber, accelerate the object of decay water pressure fluctuations to realize impedance mode, but, the key that realizes the current one-way check in the impedance hole of flowing through be to search out a kind of rely on differential water pressures change automatically, flexibly, switching mechanism reliably, hydraulic automatism control panel turnover mechanism is divided into and is counted in this background just.
Realize one-way check function, need in the time that gush on unit current direction surge-chamber top, stay open state in impedance hole, and ensure that impedance hole closes automatically under current direction time.Therefore the actual mechanism that can realize this function is a lot, can be mechanical type, electrodynamic type, fluid pressure type or louvered structure, but because the running environment of this mechanism is for a long time in water, maintenance and replacing are all very difficult, therefore electronic or fluid pressure type is difficult to ensure its safety, reliable and stable operation, and complex structure, layout is got up very difficult, and louvered is difficult in intensity ensure under high water head effect.
Utility model content
For the employing of solution hydraulic power plant surge-chamber one-way check is electronic or fluid pressure type mechanism is difficult to ensure its safety, reliable and stable operation, and complex structure and other problems, the utility model provides a kind of waterpower self-control one-way check panel turnover mechanism, this panel turnover mechanism adopts mechanical type lever structure, utilize hydraulic automatism control, simple and practical, can realize automatically, flexibly, reliably the one-way check of current.
To achieve these goals, the technical scheme that the utility model adopts is:
A kind of waterpower self-control one-way check panel turnover mechanism, its design feature is, and waterpower self-control one-way check panel turnover mechanism, is characterized in that, comprises the free bearing being arranged on surge-chamber cover plate, and this free bearing is positioned at a side in one-way check impedance hole; Described free bearing and a lever are hinged, and turnover panel is equipped with in one end of this lever, and the other end has bascule; Described lever relatively props up and in free bearing rotation process, makes turnover panel with the laminating of surge-chamber cover plate or separate and realize closing or opening of one-way check impedance hole.
Thus, a free bearing and turnover panel are hinged, and are fixed on a side in one-way check impedance hole; Reverse turning bed structure utilizes lever principle, in impedance hole, one side is established turnover panel, the other end is established bascule, utilizes the surge-chamber differential water pressures that current variation in water pressure causes up and down to realize the upset of mechanism, makes turnover panel with the laminating of surge-chamber cover plate or separates and realize closing or opening of one-way check impedance hole.
Be below the technical scheme of further improvement of the utility model:
In order to improve the reliability of connection, in described surge-chamber cover plate, be provided with embedded part, described free bearing and described embedded part are fixedly linked.
For turnover panel is played to buffer protection function, described one-way check impedance hole upstream and downstream side is fixed with cushion pad, this cushion pad in the time of the laminating of turnover panel and surge-chamber cover plate between turnover panel and surge-chamber cover plate.
As a kind of concrete fixed form, described cushion pad is fixed on surge-chamber cover plate by pressing plate; Described pressing plate and embedded part are fixedly linked.
In order to prevent after cushion pad from damaging entering in unit and slow down the impact of panel turnover mechanism reciprocally swinging to surge-chamber cover plate, as the form of structure of another kind of cushion pad, in described free bearing, be provided with cushion pad, this cushion pad is positioned at lever below, thus, in lever swing process, cushion pad can play buffering and position-limiting action to lever, slows down impact.
The maximum compressibility of the cushion pad of described free bearing is 2mm ~ 5mm.
Described cushion pad is yielding rubber.
Make panel turnover mechanism move required differential water pressures size in order to regulate, described bascule is the balance weight that is arranged on the lever other end.
Know-why of the present utility model is: according to the corresponding panel turnover mechanism of hydraulic power plant surge-chamber cover plate one-way check hole area size design, panel turnover mechanism is arranged on one-way check hole, rely on the opening and closing in the switch control one-way check hole of reverse turning bed structure, in the time of load rejection, pour into surge shaft top from unit direction diversion tunnel current, form hydraulic pressure upwards, utilize hydraulic pressure that reverse turning bed structure is opened; In the time that current fall after rise, top backwater forms downward hydraulic pressure, and reverse turning bed structure is closed and hindered flow, thereby reaches water pressure fluctuations decay.Balance weight mainly regulates and makes panel turnover mechanism move required differential water pressures size, the support of a free bearing during for reverse turning bed structure and balance weight upset.
Compared with prior art, the beneficial effects of the utility model are: the utility model utilizes opening or closing of hydraulic automatism control one-way check impedance hole, simple in structure, safe and reliable.
Below in conjunction with drawings and Examples, the utility model is further elaborated.
Brief description of the drawings
Fig. 1 is the structure principle chart (turnover panel closed condition) of an embodiment of the utility model;
Fig. 2 is the view that in Fig. 1, turnover panel is opened;
Fig. 3 is the top view of Fig. 1.
Fig. 4 is the arrangement diagram that the utility model entirety is positioned at surge-chamber;
Fig. 5 is the structure principle chart (turnover panel closed condition) of an embodiment of the utility model;
Fig. 6 is the view that in Fig. 5, turnover panel is opened.
In the drawings
1-balance weight; 2-props up free bearing; 3-turnover panel; 4-embedded part; 5,12-cushion pad; 6-pressing plate; 7-lever; 8-surge-chamber cover plate; 9-one-way check impedance hole; The free hole of 10-; 11-panel turnover mechanism.
Detailed description of the invention
Application example
Southwest China some hydropower station, installed capacity 2 × 50MW, average annual energy generation 4.025 hundred million kWh.Power station diversion system is by water inlet, by pressing diversion tunnel, surge-chamber and pressure pipeline etc. to form.Water inlet is arranged in Jiang Zuoan, adopts the layout pattern of " forward flood and sand discharging, lateral intake ", and 4 hole trashracks and 1 hole emergency repair gate are set.The pressure diversion long 6901m in road before surge-chamber, average gradient i=3.318 ‰, derivation conduit section is circular, internal diameter 9.5m, flow 247.0m3/s is quoted in design, adopts reinforced concrete lining layer completely.
Surge-chamber adopts water-chamber-type, between diversion tunnel and chamber on surge-chamber, adopt Circular Shaft to be connected, Bottom Altitude 845.50m in chamber on surge-chamber, calculates by the holder horse formula of recommending in DL/T5058--1996 " hydraulic power plant surge-chamber design specifications ", and surge-chamber stable cross section area is 1554m
2(diameter 44.5m circle cross section area).In order to ensure side slope safety, saving construction investment, the reduction difficulty of construction of surge-chamber to factory building place, according to the topographic and geologic condition of Set surge tank position, surge-chamber adopts the water-chamber-type scheme of chamber of only arranging, and adopts vertical shaft to be connected, vertical shaft diameter 20.0m between diversion tunnel and chamber on surge-chamber.
Since power station starts two unit commitment operations on December 28th, 2013, find that in running, there are the following problems: when unit load carrying, spiral case water pressure fluctuations is larger, obvious especially when load adjustment, spiral case hydraulic pressure waveform occurs now and then and increases gradually and produce hydraulic pressure reforming phenomena, spiral case hydraulic pressure amplitude maximum reaches 0.20MPa left and right, cycle 6 min～8min, and after having stator complete shut-down, hydraulic pressure still continues to shake the long period, even reaches 5 hours above phenomenons; Stator is switched to manual mode, and in the constant situation of fixed guide vane aperture, hydraulic pressure and load fluctuation meeting decay to stable state gradually.
By existing problems are analyzed, think that this power station has low water head, large flow, long water-carriage system feature, when normally moving, power station may there is less sudden load variations, the change that the hydraulic turbine is quoted flow will cause the fluctuation of surge-chamber water level, utilize existing surge-chamber to be difficult to decay to as early as possible stable state to water pressure fluctuations, be unfavorable for machine unit scheduling operation.
For surge-chamber water-level fluctuation is decayed fast, when impedance hole is set, what also area of surge tank must be expanded is very large, can increase so a large amount of construction investments.Consider a kind of novel impedance hole of accelerating water-level fluctuation decay for this reason: one-way check impedance hole, be arranged to multiple little impedance holes by impedance hole, one of them is the two-way water of crossing, other holes are one-way check (they being that current can only flow into and can not flow out).On one-way check hole, arrange the panel turnover mechanism of waterpower self-control, rely on the opening and closing in the switch control one-way check hole of reverse turning bed structure.
As shown in Figure 1, described waterpower self-control one-way check panel turnover mechanism comprises the free bearing 2 being arranged on surge-chamber cover plate 8, this free bearing 2 is positioned at a side in one-way check impedance hole 9, described embedded part 4 is fixing for a free bearing 2 and concrete surge-chamber cover plate 8 processed, prop up free bearing 2 hinged with reverse turning bed structure, and be fixed on a side in one-way check impedance hole; Reverse turning bed structure utilizes lever principle, in impedance hole, 9 one sides are established turnover panel 3, the other end is established bascule 1, utilize the surge-chamber differential water pressures that current variation in water pressure causes up and down to realize the upset of mechanism, make turnover panel 3 with 8 laminatings of surge-chamber cover plate or separate and realize closing or opening of one-way check impedance hole 9.Thus, as shown in Figure 2, in the time of load rejection, pour into surge shaft top from unit direction diversion tunnel current, form hydraulic pressure upwards, under Water Pressure, reverse turning bed structure is opened; In the time that current fall after rise, top backwater forms downward hydraulic pressure, and under Water Pressure, reverse turning bed structure is closed and hindered flow, thereby reaches water pressure fluctuations decay.
Verify by hydraulic model test, panel turnover mechanism can be automatically under upper and lower variation in water pressure, flexibly, reliably upset, realize the one-way check energy dissipating to current.Solved due to the too small energy dissipating of surge shaft area slowly and crisis unit safety operation problem has ensured power plant safety stable operation.
Certainly, prop up in free bearing 2 and be also provided with cushion pad 12, this cushion pad 12 is positioned at lever 7 belows, in lever swing process, cushion pad can play cushioning effect, avoids weight 1 and turnover panel 3 to carry out rigid shock to surge-chamber cover plate 8, best, after cushion pad 12 arranges, its maximum compressibility of being compressed by lever 7 is that 4mm is advisable.Cushion pad 12 is arranged in a free bearing 2, has also avoided the cushion pad after damaging simultaneously and has entered unit for the part of fixing cushion pad by runner, affects unit operation safety.
The content that above-described embodiment is illustrated should be understood to these embodiment only for being illustrated more clearly in the utility model, and be not used in restriction scope of the present utility model, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present utility model.
Claims (8)
1. a waterpower self-control one-way check panel turnover mechanism, is characterized in that, comprises the free bearing (2) being arranged on surge-chamber cover plate (8), and this free bearing (2) is positioned at a side in one-way check impedance hole (9); Described free bearing (2) is hinged with a lever (7), and turnover panel (3) is equipped with in one end of this lever (7), and the other end has bascule; Described lever (7) relatively props up and in free bearing (2) rotation process, makes turnover panel (3) and surge-chamber cover plate (8) laminating or separate and realize closing or opening of one-way check impedance hole (9).
2. waterpower self-control one-way check panel turnover mechanism according to claim 1, is characterized in that, is provided with embedded part (4) in described surge-chamber cover plate (8), and described free bearing (2) is fixedly linked with described embedded part (4).
3. waterpower self-control one-way check panel turnover mechanism according to claim 2, it is characterized in that, described one-way check impedance hole (9) upstream and downstream side is provided with cushion pad (5), and this cushion pad (5) is positioned between turnover panel (3) and surge-chamber cover plate (8) in the time of turnover panel (3) and surge-chamber cover plate (8) laminating.
4. waterpower self-control one-way check panel turnover mechanism according to claim 3, is characterized in that, described cushion pad (5) is fixed on surge-chamber cover plate (8) by pressing plate (6); Described pressing plate (6) is fixedly linked with embedded part (4).
5. waterpower self-control one-way check panel turnover mechanism according to claim 1, is characterized in that, is provided with cushion pad (12) in described free bearing (2), and this cushion pad (12) is positioned at lever (7) below.
6. waterpower self-control one-way check panel turnover mechanism according to claim 5, is characterized in that, the maximum compressibility of the cushion pad (12) of described free bearing (2) is 2mm ~ 5mm.
7. according to the waterpower self-control one-way check panel turnover mechanism described in claim 3 or 4, it is characterized in that, described cushion pad (5) is yielding rubber.
8. according to the waterpower self-control one-way check panel turnover mechanism one of claim 1 ~ 6 Suo Shu, it is characterized in that, described bascule is for being arranged on the balance weight (1) of lever (7) other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420388865.5U CN203960825U (en) | 2014-07-15 | 2014-07-15 | A kind of waterpower self-control one-way check panel turnover mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420388865.5U CN203960825U (en) | 2014-07-15 | 2014-07-15 | A kind of waterpower self-control one-way check panel turnover mechanism |
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| CN203960825U true CN203960825U (en) | 2014-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185011A (en) * | 2019-07-03 | 2019-08-30 | 辽宁省水利水电勘测设计研究院有限责任公司（原名称为辽宁省水利水电勘测设计研究院） | Multi-functional in a kind of surge shaft blocks dirty maintenance structure |
-
2014
- 2014-07-15 CN CN201420388865.5U patent/CN203960825U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185011A (en) * | 2019-07-03 | 2019-08-30 | 辽宁省水利水电勘测设计研究院有限责任公司（原名称为辽宁省水利水电勘测设计研究院） | Multi-functional in a kind of surge shaft blocks dirty maintenance structure |
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