CN1616774A - Sluice gate flow cutting off method and hinge type quick gate - Google Patents
Sluice gate flow cutting off method and hinge type quick gate Download PDFInfo
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- CN1616774A CN1616774A CN 200410061166 CN200410061166A CN1616774A CN 1616774 A CN1616774 A CN 1616774A CN 200410061166 CN200410061166 CN 200410061166 CN 200410061166 A CN200410061166 A CN 200410061166A CN 1616774 A CN1616774 A CN 1616774A
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Abstract
The sluice gate flow cutting off method includes the following steps: when reverse water flow passes through the sluice and it is needed to block water flow with the gate, the gate with movable leaves is descended fast while keeping the movable leaves opened for reverse water flow to pass through and for the gate to accept smaller water thrust and falling friction resistance; and just before the gate bottom reaches the sluice bottom, the movable leaves are released and shut instantaneously under the water pressure for the gate to fall to its place slowly to cut the reverse water flow. The hinged fast gate includes gate slots and gate body, and features the gate body with several openings, leaves to close the openings and sawtoothed positioning beam on one side corresponding to positioning beam slot and touch seat on the gate slot. The present invention may cut flow fast and safely, and is suitable for various large sluices.
Description
Technical field
The present invention relates to a kind ofly cross the gate cut-off method of water flow passage and for implementing the stop gate device that this method designs.
Background technology
China has built large quantities of various forms of large-scale drainage pumping plants successively since the sixties in 20th century, and the stop gate cutout is usually adopted in its outlet.According to the startup of axial-flow pump unit with shut down characteristic, pumping plant is that water pump assembly can be opened when starting and can quick closedown when shutting down fast to the requirement of stop gate.For example, when water pump assembly started, gate opening needed to start flow with pump assembly, lift adapt: opened slowly, and may cause motor to overload; Too fastly too early then may cause in runner, taking place pneumatic hammer and open, make unit even pump house produce harmful vibration.And for example, when the water pump assembly accidental shutdown, the closing a speed and must satisfy axial-flow pump reversing rotating speed of stop gate less than allowing runaway speed, it is fast more promptly to close a speed, and the axial-flow pump runaway speed is low more, and is just favourable more to pump assembly.Usually attempt to reach the purpose of quick closedown on the engineering by using way that hydraulic pressure opens and closes gate and increase the gate counterweight instead.But increase counterweight and certainly will increase Qi Menli, and the counterweight that is increased will be subjected to the restriction that door body structure bears the limit, closed Men Li and often can not satisfy the closing gate rate request and hydraulic hoist produces, it safeguards that the aspect also exists the hydraulic pressure that brings because of leakage of oil and reduces and close problems such as a power is not enough.Some large and medium-sized water conservancy project runners exist the problems referred to above equally on gate cutout mode.
Summary of the invention
The objective of the invention is to overcome present riverine large-scale draining runner under the over hump water level state, during accidental shutdown, stop gate can't fall rapidly even can't cut out the technical barrier that puts in place, and then provides a kind of cut-off method of crossing water flow passage to reach to implementing the stop gate device that this method designs; Method that is proposed and loose-leaf stop gate device not only can be finished pumping plant accidental shutdown technical measures safely and fast, but also " closing lock starts " problem can avoid pump assembly to start the time.
As everyone knows, the keying of winding type plane gate, Qi Luomen advocates to lean on the deadweight of gate.Fig. 1 is the force analysis figure of gate dropping process, and the arrow direction is a water (flow) direction.During barrier gate, the pump discharge refluence makes generation frictional resistance f upwards between gate two side sealing contact surfaces and the gate slot to the flowing pressure (or thrust T) of gate; When G＞2f, gate falls by deadweight, and its speed that falls depends on to fall the size of a power (G-2f); When 2f → G, gate can not fall by deadweight, and gate can't be closed and be put in place.The present invention adopts and to reduce the principle of gate slot frictional resistance f with a resistance that reduces to fall, and gate is designed to loose-leaf, in the gate dropping process, door leaf is opened, keep consistent, avoid the flowing pressure of part current opposite house body, gate quick closedown under action of gravity with water (flow) direction.
Technical scheme provided by the invention is: a kind of water flow passage gate cut-off method of crossing comprises the following steps:
When reverse flow passes through runner, when needing the gate dash, put down gate and keep swing leaf to open with swing leaf, reverse flow passes through from the aperture of opening, hydraulic thrust to gate integral body reduces, and then reduces the frictional resistance that gate falls, and the door body relies on deadweight to descend fast; When gate bottom is about to arrive the runner ground sill, the releasing activity door leaf, swing leaf was closed in flowing pressure effect following moment, and gate door body cushions the position, and reverse flow is blocked; The Emergency Gate that close on the runner this moment is again finished sealing.Above-mentioned gate with swing leaf is meant that a body is provided with the gate in aperture, and gate is provided with several door leafs with the movable aperture closed that connects of door body.
The present invention also provides a kind of loose-leaf stop gate of realizing said method, comprise the door body that has gate slot and can in gate slot, move, several door leafs in the aperture closed that the door body is provided with the aperture, connect with door body activity, the Men Tiyi side is provided with sawtooth positioning beam, and is provided with sawtooth positioning beam groove and bumps seat on the gate slot of this side.
Above-mentioned several door leafs connect with door sports association by vertical rotating shaft separately, and vertical rotating shaft has off-centre with respect to door leaf, its objective is loose-leaf is rotated by unified direction under hydro-flow thrust.
Corresponding each loose-leaf door leaf is provided with the door leaf limited block on the above-mentioned door body, and its effect is to limit loose-leaf door leaf opening angle less than 90 °, is generally 75 °～80 °.
One side of above-mentioned loose-leaf door leaf upper end is provided with and the parallel sawtooth positioning beam of gate door body, and beam body two ends are provided with touching lever, and beam body lower edge is provided with some sawtooth, when relying on the loose-leaf door leaf that drops on several unlatchings of conducting oneself with dignity, can block the door leaf location.
The bottom of above-mentioned sawtooth positioning beam groove is provided with bumps seat; Bump the seat put height should satisfy sawtooth positioning beam when gate is closed substantially touching lever can with bump seat and bump against, and break away from and discharge the loose-leaf door leaf.
When the loose-leaf stop gate of design in the large-scale siphon outlet conduit drainage pumping plant, above-mentioned loose-leaf door leaf perforated area should calculate according to axial-flow pump unit starting transient process, is determined by unit required drain discharge between the starting period, avoids closing lock and starts.After perforated area is determined, calculate the closing velocity of checking the loose-leaf stop gate by the accidental shutdown transient process.
Compare with producing stop gate and the cut-off method of going up extensive use, the present invention has following characteristics:
(1) designed special loose-leaf closing control mechanism, in the door body dropping process, the loose-leaf door leaf is opened, allow current to flow backwards by the gate aperture, reduce the hydraulic thrust of current to gate, a body whereabouts frictional resistance is reduced, and by the deadweight quick closedown, its performance is better than general stop gate at present to the assurance gate under the situation of additional any counterweight or external force.
(2) with cross water flow passage on the flap valve that generally uses compare, the present invention not only can guarantee the automatic open and close of pump assembly, and in the unit normal course of operation, to the runner non-resistance.Frame for movement of the present invention can not resemble and be subjected to the fatigue damage that causes because of water impact the flap valve, long service life, and safeguard simple.
(3) utilize the loose-leaf stop gate to finish the cutout function, utilize Emergency Gate to cooperate and finish the sealing function; And, utilize the compressed air in the runner to offset the water-head of runner and discharge bay at the pumping plant that compressed air cutout system (referring to ZL 99 1 16528.4) is housed, also can reach the purpose of automatic water stopping easily;
When (4) pump assembly starts draining, can require timely draining, avoid " closing lock starts " of axial-flow pump according to starting lift; Adopt waterpower to open the loose-leaf door leaf automatically, not only simplified the operation sequence that axial-flow pump starts, and guaranteed the safety of pump assembly start-up course;
(5) the present invention is not only applicable to hydrocone type axial flow pumping plant, is applicable to large-scale straight pipe type axial flow pumping plant yet, and because reverse flow impacts the cutout measure of gate on can't the large and medium-sized runner of quick closedown.
Description of drawings
Fig. 1 is the stressed schematic diagram of plane gate;
Fig. 2 is the structural representation of loose-leaf stop gate of the present invention;
Fig. 3 is the A-A zoomed-in view of Fig. 2;
Fig. 4 is the B-B zoomed-in view of Fig. 2.
In Fig. 3～4 shown in the C arrow represent the forward water (flow) direction.
Wherein: 1-loose-leaf door leaf, 2-axis of rotation, 3-door leaf bearing, 4-door leaf stop, 5-sawtooth positioning beam, 6-touching lever, 7-bump runner, the 17-gate lifting eye that seat, 8-channel-section steel, 9-angle steel, 10-gate door body, 11-door body orifice, 12-gate slot, 13-beam groove, 14-positioning support wheel, 15-ground sill, 16-do not block as yet.
The specific embodiment
The loose-leaf stop gate, comprise the gate door body 10 that has gate slot 12 and can in gate slot, move, door body 10 be provided with aperture 11 and with several door leafs 1 in the movable aperture closed 11 that connects of door body, a side parallel with door body 10 is provided with sawtooth positioning beam 5, and is provided with sawtooth positioning beam groove 13 and bumps seat 7 on the gate slot 12 of this side.
Above-mentioned aperture 11 is arranged at the middle part of plane gate, and its upper and lower both sides are provided with the crossbeam channel-section steel 8 that connects firmly with plane gate.On angle steel 9 welding beam channel-section steels 8, be used for fixing the bearing 3 of door leaf 1, bearing 3 adopts Ω shape active joint with angle steel 9, so that maintenance dismounting door leaf 1.
Above-mentioned door leaf 1 vertically connects with door body 10 by rotating shaft 2 and bearing 3, and rotating shaft 2 has certain off-centre with respect to door leaf 1, and its axle is positioned at the wide place of 1/3 loose-leaf door leaf, its objective is loose-leaf door leaf 1 is rotated by unified direction under hydro-flow thrust.
At channel-section steel 8 places of above-mentioned door body 10, corresponding each loose-leaf door leaf 1 is fixed with upper and lower two door leaf limited blocks 4, and its effect is to limit the maximum opening angle of loose-leaf door leaf 1 less than 90 °.
Above-mentioned door body 10 both sides are provided with positioning support wheel 14, and when door body 10 during along gate slot 12 upper and lower moving, bogie wheel 14 can play the effect of supporting the location and reducing friction.
Above-mentioned sawtooth positioning beam 5 is parallel with gate door body 10, and can be upper and lower mobile in the sawtooth positioning beam groove 13 of gate slot 12 1 sides.
Above-mentioned sawtooth positioning beam 5 two ends are extended for touching lever 6, and there are some sawtooth beam body lower edge, when dropping on the loose-leaf door leaf 1 of several unlatchings, can block the door leaf location.
The bottom of above-mentioned beam groove 13 is provided with bumps seat 7, its position height should satisfy when gate is closed substantially sawtooth positioning beam can with bump seat and bump against, and break away from and discharge the loose-leaf door leaf.
As embodiment, arrange the loose-leaf stop gate on the large-scale drainage pumping plant siphon outlet conduit, pumping plant is under over hump water level, during the water pump accidental shutdown, winch hoist discharges gate at once, when reverse flow occurs, do not put in place as if closing as yet at gate, be runner 16 when not blocked fully as yet, sawtooth positioning beam 5 is sagging naturally to be located on the loose-leaf door leaf 1 of unlatching, and its sawtooth blocks the door leaf of opening, the water that partly flows backwards passes through gate, door inside and outside differential water pressures reduces, and frictional resistance also reduces greatly, and the door body relies on deadweight to descend fast; To be about to arrive ground sill 15 instantaneous when gate bottom, and touching lever 6 is collided with the seat 7 that bumps of beam groove 13 lower ends, with sawtooth positioning beam 5 interceptions, makes it to break away from loose-leaf door leaf 1, and loose-leaf door leaf 1 cut out in flowing pressure effect following moment, the gate door body 10 bufferings position that falls.Finished the effect of blocking-up current when the loose-leaf stop gate after, the Emergency Gate on the pumping plant runner can cut out, finish the sealing function.
In addition; if the middle part perforated area of loose-leaf stop gate is determined by the required startup flow that passes through of starting mode of pump process calculating; and utilize the accidental shutdown transient process to calculate; check closing gate speed and whether satisfy the shutdown requirement; set loose-leaf stop gate on the then above-mentioned pumping plant outlet passage; also can solve under the over hump water level " closing lock starts " problem of axial-flow pump unit.For preventing the refluence before the unit starting, stop gate on the outlet passage must cut out, but according to the axial-flow pump operating characteristic, the axial-flow pump unit can not start by closed shutter again, at this moment, because the loose-leaf stop gate is when water pump assembly starts, can allow the startup current overcome at an easy rate and act on door leaf reverse flow thrust, wash door leaf 1 forward open and pass through, when door leaf rotates to 75 °～80 °, by 4 lockings of door leaf limited block, water pump is able to outside draining, has avoided the unit overload, after the water pump assembly clean boot, by mechanism for opening/closing gate lifting eye 17 is sling, guaranteed that the axial-flow pump unit safety starts.
Claims (6)
1. cross water flow passage gate cut-off method for one kind, it is characterized in that comprising the following steps:
When reverse flow passes through runner, when needing the gate dash, put down gate and keep swing leaf to open with swing leaf, reverse flow passes through from the aperture of opening, hydraulic thrust to gate integral body reduces, and then reduces the frictional resistance that gate falls, and the door body relies on deadweight to descend fast; When gate bottom is about to arrive the runner ground sill, the releasing activity door leaf, swing leaf was closed in flowing pressure effect following moment, and gate door body cushions the position, and reverse flow is blocked.
2. loose-leaf stop gate, comprise the door body that has gate slot and can in gate slot, move, it is characterized in that: several door leafs in the aperture closed that the door body is provided with the aperture, connect with door body activity, the Men Tiyi side is provided with sawtooth positioning beam, and is provided with sawtooth positioning beam groove and bumps seat on the gate slot of this side.
3. loose-leaf stop gate according to claim 2 is characterized in that: several door leafs connect with door sports association by vertical rotating shaft separately.
4. loose-leaf stop gate according to claim 3 is characterized in that: vertical rotating shaft has off-centre with respect to door leaf.
5. according to claim 2 or 3 or 4 described loose-leaf stop gates, it is characterized in that: corresponding each loose-leaf door leaf is provided with the door leaf limited block on the door body.
6. according to claim 2 or 3 or 4 described loose-leaf stop gates, it is characterized in that: the sawtooth positioning beam two ends are provided with touching lever, and the sawtooth positioning beam lower edge is provided with some sawtooth that can block door leaf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061166 CN1284906C (en) | 2004-11-23 | 2004-11-23 | Sluice gate flow cutting off method and hinge type quick gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410061166 CN1284906C (en) | 2004-11-23 | 2004-11-23 | Sluice gate flow cutting off method and hinge type quick gate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1616774A true CN1616774A (en) | 2005-05-18 |
| CN1284906C CN1284906C (en) | 2006-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410061166 Expired - Fee Related CN1284906C (en) | 2004-11-23 | 2004-11-23 | Sluice gate flow cutting off method and hinge type quick gate |
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| Country | Link |
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| CN (1) | CN1284906C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853485A (en) * | 2019-03-22 | 2019-06-07 | 天津大学前沿技术研究院有限公司 | A kind of hydraulic gate structure of adjustable lower suction |
| CN110453651A (en) * | 2019-09-10 | 2019-11-15 | 扬州大学 | A kind of butterfly valve type flap valve and its application method for reversible passage |
-
2004
- 2004-11-23 CN CN 200410061166 patent/CN1284906C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109853485A (en) * | 2019-03-22 | 2019-06-07 | 天津大学前沿技术研究院有限公司 | A kind of hydraulic gate structure of adjustable lower suction |
| CN109853485B (en) * | 2019-03-22 | 2024-02-06 | 天津大学前沿技术研究院有限公司 | Hydraulic gate structure capable of adjusting lower suction force |
| CN110453651A (en) * | 2019-09-10 | 2019-11-15 | 扬州大学 | A kind of butterfly valve type flap valve and its application method for reversible passage |
| CN110453651B (en) * | 2019-09-10 | 2024-06-04 | 扬州大学 | Butterfly valve type flap valve for bidirectional flow passage and application method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1284906C (en) | 2006-11-15 |
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