CN102052488A - Centrifugal one-way cutoff valve - Google Patents

Abstract

The invention discloses a centrifugal one-way cutoff valve. Key points of the technical scheme are that: 2 to 4 rotatable gears are arranged on 2 to 4 brackets, which are fixed at the upper end of a guide sleeve, and are well engaged with a gear shaft at the upper end of a valve shaft; a centrifugal ball is fixed at the lower end of each gear through a threaded sleeve and a connecting rod; the guide sleeve is fixed at the central position of a fixing pore plate with an air hole; the fixing pore plate is fixed on an outer flange plate; the lower end of the valve shaft is provided with a valve cover; and the centrifugal one-way cutoff valve is fixed between an upper main shaft and a lower main shaft. The valve is convenient to install and can be used reliably.

Description

Centrifugal unidirectional stop valve

Technical field:

The present invention is a kind of unidirectional stop valve that is used in the hydraulic turbine generator main shaft.

Background technique:

All be provided with a Hand-operated butterfly valve or ball float in the main shaft on the hydraulic generator unit in the too high hydroelectric power plant of tailwater elevation, when generator set moves, butterfly valve opened, so that carry out tonifying Qi by detachable handle mechanism; When the of short duration shutdown of generator set, with handle mechanism butterfly valve cuts out again, avoid tail water to enter in the generator by the main shaft inner chamber, when ball float came on the water, air scoop was advanced in shutoff, caused the accident of water logging unit.So; this Push And Release with handle mechanism manual operation butterfly valve; very inconvenient; and often forget out and forget to close, the sealing effect of ball float is more undesirable, so bring very big hidden danger for the normal operation of unit safety; for this reason; the too high power station a kind of machine that opens of urgent need of tailwater elevation is opened automatically, and shut down and close automatically, and reliable unidirectional stop valve.

Summary of the invention:

Purpose of the present invention aims to provide a kind of hydraulic generator unit start and opens automatically; shut down a kind of centrifugal unidirectional stop valve of closing automatically; air can be mended in the water turbine by this valve when promptly starting shooting, and the water during shutdown in the water turbine volute can not enter generator again, it is characterized in that:

The guide pin bushing tube that will have 2～4 supports is fixedly welded on fixedly on the orifice plate central position, is fixedly having a plurality of air holes on the orifice plate, and the valve shaft that the upper end is had the tooth axle penetrates in the guide pin bushing tube; Again with 2～4 gears by axle and bearing respectively correspondence be contained on 2～4 supports, with two axle head nuts axle is fixed, the tooth axle engagement of gear and valve shaft upper end is good, be fixed with swivel nut in each gear lower end, by connecting rod centrifugal globe and swivel nut are connected and fixed, the gross mass of the identical in quality and centrifugal globe of each centrifugal globe is greater than the quality of valve gap, fixing orifice plate closed by interior handle be bolted on the outward flange dish that has the valve port tube, the valve gap that will have anti-rotating shaft is fixed on the valve shaft lower end with big nut, and the anti-rotation hole is passed in anti-rotating shaft, more then with the outward flange dish with being bolted between main shaft and the lower main axis closing outward.

The technique effect that technological scheme provided by the present invention reached is such: be installed in the middle centrifugal unidirectional stop valve of main shaft and lower main axis, when generator operation, promptly begin high speed rotating, the centrifugal force that this rotation produced outwards moves 2～4 centrifugal globes that are contained on 2～4 supports and lifts under action of centrifugal force, under driving, centrifugal globe gear is rotated counterclockwise simultaneously by the connecting rod that is fixed on the gear, gear is in engagement with the tooth axle again, thereby the tooth axle is moved down, the tooth axle moves down the valve gap that drives on valve shaft and the valve shaft and moves down, just opened valve gap, air will enter in the water turbine by the distance of air hole and valve port tube and valve gap; When generator set was shut down, its centrifugal force was gradually reduced to disappearance, and centrifugal globe is got back on the vertical position again under action of gravity; in this process, gear is clockwise rotated; move thereby drive on tooth axle and the valve gap, closed the valve port tube, prevented that the water in the water turbine volute from entering in the generator.

The quality of each centrifugal globe is identical in this technological scheme, and each centrifugal globe quality summation is greater than the quality of valve gap simultaneously, and the position of centrifugal globe vertical level must be the valve gap closed position.

Technological scheme involved in the present invention compared with prior art has outstanding progress and significant technique effect, thus the technical solution of the present invention novel structure, simplicity of design is ingenious, production is simple, easy to use, have novelty, creativeness and a practicability.

Description of drawings:

Fig. 1. centrifugal unidirectional stop valve plan view

Fig. 2. centrifugal unidirectional stop valve A-A view

Wherein:

1, big nut 2, valve gap 3, valve shaft

4, guide pin bushing tube 5, valve port tube 6, lower main axis

7, outward closing bolt 8, outward flange dish 9, going up main shaft

10, interior handle closes bolt 11, fixedly orifice plate 12, air hole

13, tooth axle 14, gear 15, support

16, axle 17, bearing 18, swivel nut

19, connecting rod 20, centrifugal globe 21, anti-rotating shaft

22, anti-rotation hole 23, fixing bolt 24, axle head nut

Embodiment:

Uniform guide pin bushing tube (4) upper end that is fixed on of 2～4 supports (15), again guide pin bushing tube (4) lower end is welded on fixedly orifice plate (11) central position that has air hole (12), the valve shaft (3) that the upper end is had tooth axle (13) passes guide pin bushing tube (4).Bearing (17) is embedded with one heart the outside of every pair of support (15), with axle (16) each gear (14) is fixed in the endoporus of bearing (17), axle (16) two ends fix with axle head nut (24), and make gear (14) good with tooth axle (13) engagement, 2～4 centrifugal globes (20) are separately fixed at 2～4 gears (14) lower end by connecting rod (19) and swivel nut (18).Closing bolt (10) with interior handle is fixed on fixing orifice plate (11) on the outward flange dish (8), use big nut (1) that valve gap (2) is fixed on valve shaft (3) lower end again, then with closing bolt (7) outward flange dish (8) being fixed on main shaft (9) and lower main axis (6) neutral position outward.Enforcement finishes.

Claims (1)

1. centrifugal unidirectional stop valve is characterized in that:

The guide pin bushing tube that will have 2～4 supports is fixedly welded on fixedly on the orifice plate central position, is fixedly having a plurality of air holes on the orifice plate, and the valve shaft that the upper end is had the tooth axle penetrates in the guide pin bushing tube; Again with 2～4 gears by axle and bearing respectively correspondence be contained on 2～4 supports, with two axle head nuts axle is fixed, the tooth axle engagement of gear and valve shaft upper end is good, be fixed with swivel nut in each gear lower end, by connecting rod centrifugal globe and swivel nut are connected and fixed, the gross mass of the identical in quality and centrifugal globe of each centrifugal globe is greater than the quality of valve gap, fixing orifice plate closed by interior handle be bolted on the outward flange dish that has the valve port tube, the valve gap that will have anti-rotating shaft is fixed on the valve shaft lower end with big nut, and the anti-rotation hole is passed in anti-rotating shaft, more then with the outward flange dish with being bolted between main shaft and the lower main axis closing outward.

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