CN109811815A - A kind of pneumatic type jet stream suction desilting system for power station bulkhead gate slot - Google Patents
A kind of pneumatic type jet stream suction desilting system for power station bulkhead gate slot Download PDFInfo
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- CN109811815A CN109811815A CN201910212524.XA CN201910212524A CN109811815A CN 109811815 A CN109811815 A CN 109811815A CN 201910212524 A CN201910212524 A CN 201910212524A CN 109811815 A CN109811815 A CN 109811815A
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Abstract
The invention discloses a kind of pneumatic type jet streams for power station bulkhead gate slot to suction desilting system, including big rack, small shelf, slide carriage and jet stream suction Accrete clearing device, the big rack is used to jet stream suction Accrete clearing device be sent to water-bed Shamian Island as carrier, the small shelf is mounted on big rack by longitudinal translation device, the slide carriage is mounted on small bottom shelf by transverse sliding device, the jet stream suction Accrete clearing device is fixedly mounted on slide carriage, jet stream suction Accrete clearing device is for carrying out suction dredging to the bottom, jet stream can to suction Accrete clearing device by longitudinal translation device and transverse sliding device to be sent on water-bed Shamian Island from bank, and it is a wide range of interior mobile on water-bed Shamian Island.The present invention expands the suction Shamian Island product that jet stream suctions Accrete clearing device by longitudinal translation device and transverse sliding device.Dredging effect of the present invention is good, and area is big, high-efficient, can effectively solve the problems, such as that power station bulkhead gate slot dirt sand deposits.
Description
Technical field
The invention belongs to hydraulic engineering fields, are related to a kind of gate of hydropower station desilting equipment, and in particular to one kind is used for water
The pneumatic type jet stream of power station bulkhead gate slot suctions desilting system.
Background technique
China river is sandy, and sediment siltation is often the critical issue in hydraulic engineering construction.Key water control project unit import
Gate slot and its neighbouring flow intensity are weak, are easy to happen sediment siltation.Key water control project unit entrance gate slot and its neighbouring silt
Siltation can prevent bulkhead gate from promptly and accurately landing in place, in order to complete unit maintenance, it has to professional diver be asked to carry out
Underwater desilting, had not only increased expense but also there are security risks, and the construction time is longer, caused the delay of unit maintenance time.So
The design of bulkhead gate slot dredging mechanism would solve these problems.
The research of this respect is less both at home and abroad at present, is currently known the similarly power station Leshan Gong Zui and uses SQ100-50
The vertical pump for mine of 37KW, is placed directly in pond and drains, and draining while, silt was discharged together, and pond will not be become silted up by silt again
It is full, without artificial dredging again.After loading onto automatic control system, the scene that can monitor is sitting in center control machine room, automatically
Drain sand discharge.Site inspection water level is periodically arrived without the person of sending someone again, checks sediment siltation situation, arranges draining and artificial dredging.
Vertical pump for mine is easy for installation.Allow the mud of pump drainage nominal concentrations, allow to cut off the water supply idle running, these exclusive characteristics meet well
The demand.But the vertical pump for mine that the power station is selected is worn using vulnerable part after half a year.When power station sediment siltation bosom
Reached 30 meters, cannot have been met the requirements using vertical pump for mine, design bulkhead gate slot dredging mechanism be it is very necessary, also have very
Big economic benefit and social benefit.Gas-lifting type sludger low efficiency, energy consumption are high.Jetting type sludger has structure letter
Single, underwater no-rotary part, reliable operation, it is wear-resistant, do not limited by the depth of water, the advantages that underwater excavation depth is big.The U.S., preceding Soviet Union
The countries such as connection, Japan and Britain have developed the jetting type dredging dredging plant of different types.China starts to grind the beginning of the seventies
Jetting type dredging dredging plant processed；Wuhan Water Conservancy and Electric Power Univ's (now merging are as follows: Wuhan University) is the beginning of the seventies and units concerned
Cooperation, has developed " dredging river No.1 ", " sand surfing No.1 ", the jetting types dredger such as " sand surfing two ".1990~1994 years Wu Hanshui
Sharp electric power university and related shipyard cooperation have developed JET type suction formula jet stream dredger " blowing mud No.1 " and " good number long ", and lead to
The provincial-level appraisal of Guangdong provincial scientific and technological commission tissue is crossed.They oneself in Guangdong Province Zhuhai, Shenzhen and the Philippines guest add reservoir to answer
With the very big economic benefit of acquirement.
Summary of the invention
For the specific structure of unit entrance gate, a kind of practical reliable pneumatic type jet stream suction dredging dress has been invented
It sets.The existing slideway of unit entrance gate is utilized, is dragged with hoist engine suction husky device along slideway decentralization first, had when encountering
When thick silt hinders, starting jet stream suctions Accrete clearing device, the very high jet stream of spouting velocity from sand surfing nozzle, around slideway
Silt rushes, and suctions Accrete clearing device by jet stream immediately and picks up side by side between host, is drained under dam by host；Or it will take out
The silt of suction, which is transported to, to be closed on other also in the unit import of operation, is drained under dam by the unit.Meanwhile starting removable jet stream
Accrete clearing device is suctioned, is moved back and forth between pushing its slideway between unit entrance gate slot both ends by cylinder, nozzle is completed
Silt in range on one section of working face removes work.After completing the dredging in unit entrance gate slot certain depth region, penetrate
Stream suction Accrete clearing device can transfer a distance.In cycles, in this way, it is gradually completing entire unit entrance gate slot and its attached
Close dredging, until jet stream suction Accrete clearing device can transfer to safely the position of landing gate.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that:
A kind of pneumatic type jet stream suction desilting system for power station bulkhead gate slot, including big rack, small shelf slip
Plate and jet stream suction Accrete clearing device, it is characterised in that: the big rack as carrier is used to jet stream suction Accrete clearing device send
Toward on water-bed Shamian Island, the small shelf is mounted on big rack by longitudinal translation device, and the slide carriage is filled by transverse translation
It sets and is mounted on small bottom shelf, the jet stream suction Accrete clearing device is fixedly mounted on slide carriage, and jet stream suction Accrete clearing device is used for
Suction dredging is carried out to the bottom, jet stream can be made to suction Accrete clearing device from bank by longitudinal translation device and transverse sliding device
While being sent on water-bed Shamian Island, and a wide range of interior mobile on water-bed Shamian Island, the longitudinal translation device includes track groove, small shelf
Fixed plate, small shelf movable plate, walking cylinder and clamping cylinder, the track groove is fixedly mounted on big rack bottom, described small
Shelf fixed plate is fixedly mounted at the top of small shelf, and the small shelf movable plate passes through walking cylinder and small shelf fixed plate phase
Even, pass through the relative distance of walk cylinder adjustable small shelf fixed plate and small shelf movable plate, the small shelf fixed plate
With at least one clamping cylinder being mounted in track groove is equipped on small shelf movable plate, when clamping cylinder is stretched out track groove
When clamping, it is ensured that small shelf fixed plate or small shelf movable plate and track groove are relatively fixed.
As an improvement, being additionally provided with guiding device between the small shelf and big rack, the guiding device is small to be mounted on
Anti-deflection whee at the top of shelf, the anti-deflection whee are mounted in track groove.
As an improvement, the track groove is made of channel steel, the notch of two channel steels is relatively fixed in big rack bottom, small
Clamping cylinder on shelf is mounted between the upper lower flange of channel steel, and the anti-deflection whee is set to two sides at the top of small shelf, and pushes up
In channel steel bottom.
As an improvement, the big rack both ends are equipped with the limiting device of limitation small shelf limit of sports record position.
As an improvement, the transverse sliding device include track groove, slide carriage fixed plate, slide carriage movable plate, walking cylinder and
Clamping cylinder, the track groove are fixedly mounted on small bottom shelf, and the slide carriage fixed plate is fixedly mounted at the top of slide carriage, described
Slide carriage movable plate is connected by cylinder of walking with slide carriage fixed plate, is moved by the adjustable slide carriage fixed plate of walking cylinder and slide carriage
The relative distance of movable plate is equipped at least one clamping being mounted in track groove in the slide carriage fixed plate and slide carriage movable plate
Cylinder, when clamping cylinder stretching clamps track groove, it is ensured that slide carriage fixed plate or slide carriage movable plate are opposite with track groove
It is fixed.
As an improvement, being equipped with horizontal orientation device between the slide carriage and small shelf, the horizontal orientation device includes one
To channel steel and two rows of directive wheels, which is relatively fixed in small bottom shelf, and two rows of directive wheels are separately mounted to
Slide carriage two sides.
As an improvement, the small shelf both ends are respectively equipped with the baffle or limit switch for preventing slide carriage limit of sports record.
As an improvement, the jet stream suction Accrete clearing device includes immersible pump, jet sludge pump, multiple suction lines and multiple punchings
Sand blasting mouth, the immersible pump are mounted on slide carriage by bracket, and the outlet of immersible pump is divided into two-way, and a-road-through piping is connected to
The high pressure entry of jet sludge pump, another way are connected to sand flushing nozzle by pipeline, and described suction line one end is connected to jet stream mud
The suction inlet of stock pump, the other end are silt dredging mouth, and each silt dredging mouth surrounding is distributed one group and is sprayed by the sand washing that multiple sand flushing nozzles form
Mouth ring.
It is a kind of to carry out power station bulkhead gate slot dredging method using above-mentioned pneumatic type jet stream suction desilting system, it is special
Sign is, comprising the following steps:
Step 1, using crane by big rack, extend into big rack front end at the bulkhead gate of power station, big rack passes through
Suspension arm of crane is fixed temporarily；
Step 2 passes through longitudinal translation device, and jet stream suction Accrete clearing device is sent on water-bed Shamian Island；
Step 3, starting jet stream suction Accrete clearing device, carry out dredging to water-bed Shamian Island；
During step 4, dredging, jet stream is adjusted by longitudinal translation device and transverse sliding device and suctions Accrete clearing device
Position expands dredging range；
Big rack after dredging, is moved to next place using lifting and continues dredging, until water power at this by step 5
Dredging at bulkhead gate of standing finishes.
The medicine have the advantages that
The present invention makes jet stream suction Accrete clearing device with slide carriage by longitudinal translation device and transverse sliding device
Along big rack transverse movement, but can longitudinal movement, thus realize suction Shamian Island product maximize.The jet stream suctions Accrete clearing device
Underwater consolidated sand can not only be stirred, and the consolidated sand of agitation can be aspirated, the final purpose for realizing gate slot dredging.
Dredging effect of the present invention is good, and area is big, high-efficient, can effectively solve the problems, such as that power station bulkhead gate slot dirt sand deposits.
What 4 sand surfing nozzles of each silt dredging mouth configuration were sprayed is high-velocity flow, and speed can achieve 20m/s, can be with
Underwater 19 meters of consolidated sand is started.
The present invention utilizes the existing slideway of unit entrance gate, suctions dredging with step-by-step movement translating device dragging jet stream first
Device is transferred along slideway, and when encountering has thick silt to hinder, starting jet stream suctions Accrete clearing device, and speed is sprayed from sand surfing nozzle
Very high jet stream is spent, silt around slideway is rushed, Accrete clearing device is suctioned by jet stream immediately and is picked up side by side to host
Between, it is drained under dam by host；Or the silt of suction is transported to and closes on other also in the unit import of operation, it is drained by the unit
Under dam.Meanwhile starting between removable jet stream suctions slideway of the Accrete clearing device between unit entrance gate slot both ends and moving back and forth,
Complete the dredging in nozzle range on one section of working face.After completing the dredging in unit entrance gate slot certain depth region, penetrate
Stream suction Accrete clearing device can transfer a distance.In cycles, it is gradually completing entire unit entrance gate slot and its neighbouring
Dredging, until jet stream suction Accrete clearing device can transfer to safely the position of landing gate.Basic skills of the invention is: making
Silt under unit entrance gate slot and its neighbouring 19m or so the depth of water is restarted, and the silt restarted is made to suspend and take out
Suction is transported between host, is drained under dam by host；Or the silt of suction is transported to close on it is other also in the unit import of operation,
It is drained under dam by the unit.
Detailed description of the invention
Fig. 1: the pneumatic type jet stream of the embodiment of the present invention suctions desilting system overall structure schematic diagram；
Fig. 2: the big rack structural schematic diagram of the embodiment of the present invention；
Fig. 3: the small shelf structure schematic diagram of the embodiment of the present invention；
Fig. 4: the slide carriage structure schematic diagram of the embodiment of the present invention；
Fig. 5: the shelf slide carriage general assembly schematic diagram of the embodiment of the present invention；
Fig. 6: the jet stream of the embodiment of the present invention suctions Accrete clearing device pictorial diagram；
Fig. 7: the jet stream of the embodiment of the present invention suctions Accrete clearing device structural schematic diagram；
Fig. 8: the schematic diagram of the Y type suction line of the embodiment of the present invention；
Fig. 9: the pneumatic circuit master-plan schematic diagram of the embodiment of the present invention；
Figure 10: the small rack portion circuit theory figure of the embodiment of the present invention.
1- big rack, the small shelf of 2-, 3- slide carriage, 4- jet stream suction Accrete clearing device, and 11- plays flap seat, 12- channel steel, 13- gear
Plate, 16- limit switch, 21- walking cylinder, the small shelf fixed plate of 22-, 23- channel steel, 24- anti-deflection whee, 25- baffle, 26,27- folder
Tight cylinder, the small shelf movable plate of 28-, 31- slide carriage fixed plate, 32- walking cylinder, 33- slide carriage movable plate, 34,35- clamping gas
Cylinder, 36- idler wheel, 41- immersible pump, 42- jet sludge pump, 43- suction line, 44- sand flushing nozzle, 45- silt dredging mouth.
Specific embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, with reference to the accompanying drawings and embodiments to this hair
It is bright to be described in further detail, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, not
For limiting the present invention.
Fig. 1 show the overall pictorial diagram of the embodiment of the present invention, of the invention a kind of for power station bulkhead gate slot
Pneumatic type jet stream suctions desilting system and is made of big rack 1, small shelf 2, slide carriage 3 and jet stream suction Accrete clearing device 4 etc..
Big rack 1 is used as carrier, as shown in Figure 2.Big rack 1 is played by playing flap seat 11 with crane, and jet stream is suctioned
Accrete clearing device 4 is sent on water-bed Shamian Island.Big rack 1 is the steel construction being welded by angle steel and channel steel 12, and two channel steels 12 are flat
Row is welded on 1 frame of big rack in the following, functioning as guide rail use, and small 2 two sides of shelf are respectively arranged one and come rolling in channel steel 12
Dynamic anti-deflection whee 24.1 rear and front end of big rack is equipped with baffle 13 and limit switch 16, and the effect of baffle 13 and limit switch 16 is
The extreme position for limiting small shelf 2 keeps small shelf 2 round-trip, this outer baffle 13 can also add elastic component and avoid rigid collision.Greatly
It is additionally provided with longitudinal translation device on shelf 1, can drive small shelf 2 along guide rail in big rack 1 by longitudinal translation device
Longitudinal movement.
As shown in Figures 2 and 3, the longitudinal translation device includes track groove, small shelf fixed plate 22, small shelf movable plate
28, walking cylinder 21 and clamping cylinder 26,27, the track groove (i.e. channel steel 12) is fixedly mounted on 1 bottom of big rack, described small
Shelf fixed plate 22 is fixedly mounted on small 2 top of shelf, and the small shelf movable plate 28 passes through walking cylinder 3221 and small shelf
Fixed plate 22 is connected, by the walking adjustable small shelf fixed plate 22 of cylinder 3221 and small shelf movable plate 28 it is opposite away from
From the small shelf fixed plate 22 and small 28 both ends of shelf movable plate are respectively equipped with the clamping cylinder being mounted in track groove
26,27, when the stretching of clamping cylinder 26,27 clamps track groove, it is ensured that small shelf fixed plate 22 or small shelf movable plate
28 is relatively fixed with track groove.When walking, the stretching of clamping cylinder 26 in shelf fixed plate 22 small first is held out against in channel steel 12,
So that small shelf fixed plate 22 and the relative position of channel steel 12 are fixed, cylinder 21 of then walking stretches out, so that small shelf movable plate
28 move forward along channel steel 12, and after movement in place, the clamping cylinder 27 on small shelf movable plate 28 stretches out, so that small shelf moves
Movable plate 28 and the position of channel steel 12 are relatively fixed, withdraw the clamping cylinder 26 in small shelf fixed plate 22, then withdraw walking gas
Cylinder 21, so that small shelf fixed plate 22 drives small shelf 2 to move ahead, the clamping cylinder 26 of small shelf fixed plate 22 stretches out later, makes
It obtains small shelf fixed plate 22 and 12 position of channel steel is relatively fixed, complete a stepping walking circulation, continue to move according to above-mentioned steps
Make, small shelf 2 can be completed, and along 1 bottom channel steel 12 of big rack, step-by-step movement is walked back and forth, one stepping of the small walking of shelf 2
Time be at least 20 seconds (in order to sufficiently inhale sand).
Small shelf 2 of the invention is the cross for connecting the pith and slide carriage 3 of big rack 1 and slide carriage 3 implementation mechanism together
It is moved to longitudinal combination, to reach dredging purpose.In order to make the width of dredging reach requirement, small shelf 2 is increased along big
The length of 1 transverse direction of shelf, small shelf 2 by clamping cylinder 26,27 and walk cylinder 21 cooperation big rack 1 channel steel
Movement in 12, therefore the shape of small shelf 2 is inverted T shaped design, as shown in figure 3, small shelf 2 of the invention will not only meet size
It is required that and to meet certain machine driving condition and realize two-way intermittent movement, be apparent from according to design principle, small shelf 2
It is different with the motion state of slide carriage 3, when the movement of small shelf 2, slide carriage 3 is static, and when the movement of slide carriage 3, small shelf 2 is quiet
Only.Although small 2 direction of motion of shelf does not need to overcome water flow pressure without water impact, slide carriage 3 and jet stream are being undertaken
Intermittent movement back and forth is realized in the case where the weight for suctioning Accrete clearing device 4, and the external frame basic size of small shelf 2 is according to big frame
The basic size of son 1 and small slide carriage 3 determines.
Small 2 schematic three dimensional views of shelf as shown in figure 3, and the steel truss that is welded by angle steel, be top be relatively narrow
Protrusion truss, bottom is the steel truss being laterally extended along big rack 1, walking of the small shelf 2 in the channel steel 12 of big rack 1
Mode is interval step-by-step movement, is respectively equipped with small shelf fixed plate 22 and small shelf movable plate 28, small shelf in protrusion truss two sides
The clamping cylinder 26,27 that fixed plate 22 and small shelf movable plate 28 pass through two groups of asynchronous behaviors is mounted on the two of 1 bottom of big rack
In a channel steel 12, clamping cylinder 26,27 is just held out against between two edges of a wing of channel steel 12 when stretching out, so that small shelf fixed plate
22 or small shelf movable plate 28 with channel steel 12 keep relatively fixed so that the mode of 2 one stepping of small shelf is mobile.
Small 2 bottom of shelf also is provided with two channel steels 23, and slide carriage 3 is mounted in the channel steel 23 of small 2 bottom of shelf by idler wheel,
The transverse sliding device include track groove, slide carriage fixed plate 31, slide carriage movable plate 33, walking cylinder 32 and clamping cylinder 34,
35, the track groove is fixedly mounted on small 2 bottom of shelf, and the slide carriage fixed plate 31 is fixedly mounted at the top of slide carriage, described to slip
Plate movable plate 33 is connected by cylinder 32 of walking with slide carriage fixed plate 31, and the adjustable slide carriage fixed plate 31 of cylinder 32 of walking is passed through
With the relative distance of slide carriage movable plate 33, at least one is equipped in the slide carriage fixed plate 31 and slide carriage movable plate 33 and is mounted on
Clamping cylinder 34,35 in track groove, when the stretching of clamping cylinder 34,35 clamps track groove, it is ensured that slide carriage fixed plate
31 or slide carriage movable plate 33 and the track groove of small bottom shelf it is relatively fixed.When slide carriage 3 encounters baffle 25 or limit switch 16
When, that is, extreme position is moved to, lateral flattening device can control by controller and move back and forth, what the slide carriage row made a move
Time is at least 20 seconds (in order to sufficiently inhale sand).
It is illustrated in figure 43 structural schematic diagram of slide carriage of the invention.The structure of slide carriage 3 is similar with small shelf 2, and institute is different
, slide carriage 3 is since the nearly 1/2 body position of walking out can be only achieved the cleaning width of requirement, therefore the every side of slide carriage 3 devises four
Idler wheel, as shown in Figure 4.
To sum up available big rack 1, small shelf 2, the installation diagram of slide carriage 3 are as shown in Figure 5.
Fig. 6 show jet stream suction 4 structural schematic diagram of Accrete clearing device, and jet stream suctions Accrete clearing device 4 will using high pressure water flow
Shoal materials is washed into suspension, forms mud, then taken away mud by jet sludge pump 42.With structure simple, reliable operation,
It is wear-resistant, do not limited by the depth of water, the advantages that underwater suction depth is big.In view of forced erosion area distribution is wide and by suction flow compared with
Greatly, jet stream suction Accrete clearing device 4 configures two 42 devices of jet sludge pump, and a diving is arranged in every 42 device of jet sludge pump
The suction line 43 and two silt dredging mouths 45 of 41, jet sludge pumps, 42, Y shapes are pumped, the outlet of the immersible pump 41 is divided into
Two-way, a-road-through piping are connected to the high pressure entry of jet sludge pump 42, and another way is connected to sand flushing nozzle 44 by pipeline,
Described 43 one end of suction line is connected to the suction inlet of jet sludge pump 42, and the other end is divided into two silt dredging mouths 45, each suction in Y type
45 surrounding of silt mouth configures 4 sand surfing nozzles, and sand surfing nozzle carries out sand surfing to the silt dredging mouth 45 of jet sludge pump 42.Entire jet stream punching
It inhales Accrete clearing device 4 and configures 2 jet sludge pumps 42,4,45,16, silt dredging mouth forced erosion nozzle, whole device schematic diagram altogether
As shown in Figure 7.
The basic performance of jet sludge pump 42 is indicated with one group of dimensionless parameter (pressure ratio, flow-rate ratio and area ratio),
It is defined as follows:
Area ratio are as follows:
Flow-rate ratio are as follows:
Pressure ratio are as follows:
In above formula, Q indicates flow；P indicates pressure；V indicates mean velocity in section；γ indicates severe；Z indicates position water
Head；d0Indicate throat pipe diameter；D indicates that nozzle exit diameter subscript o indicates that working fluid, s indicate that, by suction fluid, c indicates mixed
Collaborate body.
42 performance curve of jet sludge pump is substantially linear, and equation generally may be expressed as:
42 efficiency of jet sludge pump may be expressed as:
Wherein,It is experiment coefficient, takes 0.97；h0And q0It is the coefficient of performance, it is related with area ratio and volume to weight ratio.Work as bulk density
ThanValue close to 1 when, h0And q0It may be expressed as:
h0=2.667-0.00253 (m+26.07)2(m=1.5-3.0) formula (7)
h0=1.45m-0.892(m=2.5-25) formula (9)
According to known conditions and design requirement, every jet sludge pump 42 is obtained by suction flow are as follows:
42 working flow of jet sludge pump are as follows:
Q0=36m3Formula (11)
Spoil disposal bulk density are as follows:
Design work length of tube LB=0.5m, spoil disposal length of tube LC=0.2m sucts length of tube LS=4m, and assumes each pipe
Road flow velocity is economic velocity, i.e. vB=vC=2m/s, vS=2.5m/s.Then corresponding to caliber is respectively DB=0.07979m, DC=
0.10093m, DS entrance=0.05642m (at suction inlet), DS straight tube=0.07979m (single pump two suction congregation straight pipe), is rounded
It is afterwards DB=0.080m, DC=0.10m, DS entrance=0.06m, DS straight tube=0.08m.Back substitution can obtain vB=1.99m/s, vC=2.55m/
S, vS entrance=1.77m/s, vS straight tube=1.99m/s.
Friction loss are as follows:
Local resistance loss are as follows:
Gross head loss are as follows:
Wherein, each pipeline friction loss coefficient lambda=0.03, local resistance loss coefficient are respectively ζB=1.0, ζc=
1.0, ζs=5.0.Obtain instrumentation tubes head loss hB=0.239m, sludge pipe head loss hC=0.350m, 43 resistance of suction line
Lose hS=1.412m.
For 42 device of jet sludge pump, operating pressure Δ p0With outlet pressure Δ pCIt is respectively as follows:
Δp0=(H-hB)γWaterFormula (16)
ΔpC=(HC+hC)γC+hSγ formula (17)
Wherein, H is work pump lift.Calculate Δ pC=72.540kPa, therefore the work pressure of jet sludge pump 42 can be sought
Power:
Work pump lift are as follows:
Mud volumetric concentration in corresponding sludge pipe are as follows:
Calculate the formula of non-silting velocity are as follows:
In formula, νIt is heavyFor sand grain sinking speed, σ is parameter, its calculation formula is:
Therefore non-silting velocity v can be obtainedIt does not become silted up=1.472m/s.
Obvious vB、vCIt is all larger than vIt does not become silted up, i.e., mud will not deposit in each pipe.
Taking atmospheric pressure is Pa=10m, water pressure are Pv=0.24m, 42 mounting height of jet sludge pump are Ht=-
33m, then cavitation pressure ratio are as follows:
In formula,
Wherein, 43 resistance coefficient ξ of suction lines=5, p can be calculateds=-31.77m, hk=0.70.
The cavitation erosion flow-rate ratio q of jet sludge pump 42kFollowing formula approximate calculation can be used:
Wherein, ε=1.27 are taken.
Obtain qk=6.83, verify to obtain q < qk, i.e., cavitation will not occur.
Nozzle diameter are as follows:
Wherein, discharge coefficient μ is taken1=0.97, α1=1.05, obtain d1=19.3mm is rounded as 19mm.
Throat pipe diameter are as follows:
Being rounded is 48mm.
Larynx mouth away from are as follows:
Lc=1.5d1=28.5mm formula (29)
Length of throat are as follows:
Lk=6d3=288mm formula (30)
Extension length of tube is 247.37mm, available, diffuser angle of flare (full-shape) β=12°。
Verifying obtains, 42 area ratio m=6.38 of jet sludge pump, very close given area ratio, therefore the above jet stream mud
42 structure size of stock pump meets invention design requirement.
Fig. 9 is pneumatic circuit overall design drawing of the invention, and Figure 10 is small rack portion circuit theory figure of the invention, figure
10 lower left corner, the part being made of valve 2-6, effect are to realize the automatic switchover of valve 2, the period of the control switching of time-delay valve 5 and 6,
And then control the average speed of small shelf movement.Its action principle: valve 2 is in right position, is delayed by valve 5, and valve 3 switches, in turn
Valve 2 switches, and is delayed through valve 6, and valve 4 switches, and valve 2 switches again.It is thusly-formed the automatic switchover of valve 2.
During moving right, design philosophy is that, if not considering the valve action that is delayed, cylinder B and C can regard flexible one as
It causes, and opposite with cylinder A.Specific motion principle is as follows:
(1) when valve 2 is switched to right position:
Valve 12 will switch, and be switched to right position by left position, but since the effect of valve 8 is connected in delay, valve 12 will keep left position, and prolong
When later switch.I.e. cylinder A temporarily keeps clamping, and unclamps after delay with channel steel.
Valve 13 switches, and walking cylinder B stretches out, i.e., piston rod stretches out.
Valve 11 switches, and considers that the effect of valve 9,11 delay switching of valve are connected in delay, cylinder C is temporarily remained retracted, and delay extendes back
Out.The time-lag action of valve 8 is to there is impetus when guaranteeing movement, and the delay of valve 9 is to avoid clamping cylinder C too fast due to acting
And clamp in situ, it is clamped again after the cylinder B that is expert at movement.Due to such action relationships, 8 delay time of valve is greater than valve 9
Delay time.This process is the step one in trip map to the right, and two, three.
(2) when valve 2 is switched to left position:
Valve 11 switches, but because valve 10,11 delay switching of valve are connected in delay, cylinder C temporarily keeps clamping, and delay is shunk later.
Valve 13 switches, and walking cylinder B cylinder rod is fixed, cylinder moving.
Valve 12 switches, and since the effect of valve 7 is connected in delay, cylinder is temporarily remained retracted, and delay clamps later.Equally, valve 10
Delay time is greater than 7 delay time of valve.Step 4 in this process, that is, trip map, five.
In this way, slide carriage will continue to the right to move.When slide carriage reaches least significant, if being further continued for touching valve to the right
16, valve 14 switches, this exhaust hood B is flexible consistent with cylinder A, and (not considering time-lag action) opposite with cylinder C, slide carriage will to the left
Movement, principle are similar with when moving right.
Slide carriage is as the motion principle of small shelf, but due to using fixture and movement velocity different, the time of time-delay valve
Setting can according to need each self-adjusting.
Pneumatic water of embodiment of the present invention power station bulkhead gate slot desilting system work step is as follows:
(1) crane is transferred big rack 1 along slideway by the flap seat 11 that rises on big rack 1, and jet stream suctions Accrete clearing device 4
It is sent on water-bed Shamian Island；
(2) when encountering has thick silt to hinder, the jet stream of starting jet stream suction Accrete clearing device 4 suctions Accrete clearing device 4；
(3) the very high jet stream of spouting velocity in sand surfing nozzle, silt around slideway is rushed；
(4) jet sludge pump 42 of jet stream suction Accrete clearing device 4 picks up silt side by side between host by silt dredging mouth 45, by
Host drains under dam；Or the silt of suction is transported to by pipeline close on it is other also in the unit import of operation, by the unit
It drains under dam.
(5) start the motor of longitudinal translation device, so that small shelf 2 comes on the track of the channel steel 14 of 1 bottom of big rack
Backhaul motor that is dynamic, while starting transverse sliding device so that slide carriage 3 on the track of the channel steel 23 of small 2 bottom of shelf back and forth
Movement, motion profile are first-class triangle row, complete the desilting on certain working face.Working procedure (the A of pneumatic apparatus0
Indicate A cylinder piston rod contraction state, A1Indicate stretching state)
Forward direction walking:
Reversed walking:
(6) after completing the dredging in unit entrance gate slot certain depth region, jet stream suction Accrete clearing device 4 can be transferred
A distance.
(7) in cycles, step (1)~(6) are repeated, entire unit entrance gate slot and its nearby clear are gradually completing
It becomes silted up, until jet stream suction Accrete clearing device 4 can transfer to safely the position of landing gate.
It should be understood that the part that this specification does not elaborate belongs to the prior art.
It should be understood that the above-mentioned description for preferred embodiment is more detailed, can not therefore be considered to this
The limitation of invention patent protection range, those skilled in the art under the inspiration of the present invention, are not departing from power of the present invention
Benefit requires to make replacement or deformation under protected ambit, fall within the scope of protection of the present invention, this hair
It is bright range is claimed to be determined by the appended claims.
Claims (9)
1. a kind of pneumatic type jet stream for power station bulkhead gate slot suctions desilting system, including big rack, small shelf, slide carriage
And jet stream suctions Accrete clearing device, it is characterised in that: the big rack as carrier is used to jet stream suction Accrete clearing device be sent to
On water-bed Shamian Island, the small shelf is mounted on big rack by longitudinal translation device, and the slide carriage passes through transverse sliding device
Be mounted on small bottom shelf, the jet stream suction Accrete clearing device is fixedly mounted on slide carriage, jet stream suction Accrete clearing device for pair
The bottom carries out suction dredging, jet stream can be made to suction Accrete clearing device from bank by longitudinal translation device and transverse sliding device
Be sent on water-bed Shamian Island, and it is a wide range of on water-bed Shamian Island in it is mobile, the longitudinal translation device includes that track groove, small shelf are solid
Fixed board, small shelf movable plate, walking cylinder and clamping cylinder, the track groove are fixedly mounted on big rack bottom, the small frame
Sub- fixed plate is fixedly mounted at the top of small shelf, and the small shelf movable plate is connected by cylinder of walking with small shelf fixed plate,
Pass through the relative distance of walk cylinder adjustable small shelf fixed plate and small shelf movable plate, the small shelf fixed plate and small
It is equipped at least one clamping cylinder being mounted in track groove on shelf movable plate, clamps track groove when clamping cylinder stretches out
When, it is ensured that small shelf fixed plate or small shelf movable plate and track groove are relatively fixed.
2. pneumatic type jet stream as described in claim 1 suctions desilting system, it is characterised in that: the small shelf and big rack it
Between be additionally provided with guiding device, the guiding device is the anti-deflection whee being mounted at the top of small shelf, and the anti-deflection whee is mounted on track
In slot.
3. pneumatic type jet stream as claimed in claim 2 suctions desilting system, it is characterised in that: the track groove is by channel steel system
At the notch of two channel steels, which is relatively fixed, is mounted on the upper bottom wing of channel steel in the clamping cylinder on big rack bottom, small shelf
Between edge, the anti-deflection whee is set to two sides at the top of small shelf, and withstands on channel steel bottom.
4. pneumatic type jet stream as described in claim 1 suctions desilting system, it is characterised in that: the big rack both ends are equipped with limit
Make the limiting device of small shelf limit of sports record position.
5. the pneumatic type jet stream as described in claim 2 to 4 any one suctions desilting system, it is characterised in that: the transverse direction
Translating device includes track groove, slide carriage fixed plate, slide carriage movable plate, walking cylinder and clamping cylinder, the fixed peace of the track groove
Mounted in small bottom shelf, the slide carriage fixed plate is fixedly mounted at the top of slide carriage, the slide carriage movable plate by walking cylinder with
Slide carriage fixed plate is connected, and passes through the relative distance of walk cylinder adjustable slide carriage fixed plate and slide carriage movable plate, the slide carriage
At least one clamping cylinder being mounted in track groove is equipped in fixed plate and slide carriage movable plate, when clamping cylinder is stretched out rail
When road slot clamps, it is ensured that slide carriage fixed plate or slide carriage movable plate and track groove are relatively fixed.
6. pneumatic type jet stream as claimed in claim 5 suctions desilting system, it is characterised in that: between the slide carriage and small shelf
Equipped with horizontal orientation device, the horizontal orientation device includes a pair of of channel steel and two rows of directive wheels, and the notch to channel steel is opposite
Be fixed on small bottom shelf, two rows of directive wheels are separately mounted to slide carriage two sides.
7. pneumatic type jet stream as claimed in claim 5 suctions desilting system, it is characterised in that: the small shelf both ends are set respectively
There are the baffle or limit switch for preventing slide carriage limit of sports record.
8. pneumatic type jet stream as claimed in claim 5 suctions desilting system, it is characterised in that: the jet stream suctions Accrete clearing device
Including immersible pump, jet sludge pump, multiple suction lines and multiple sand flushing nozzles, the immersible pump is mounted on slide carriage by bracket
On, the outlet of immersible pump is divided into two-way, and a-road-through piping is connected to the high pressure entry of jet sludge pump, and another way passes through pipeline
It is connected to sand flushing nozzle, described suction line one end is connected to the suction inlet of jet sludge pump, and the other end is silt dredging mouth, each silt dredging
Mouth surrounding is distributed one group of sand flushing nozzle ring being made of multiple sand flushing nozzles.
9. a kind of carry out the slot dredging of power station bulkhead gate using pneumatic type jet stream suction desilting system described in claim 1
Method, which comprises the following steps:
Step 1, using crane by big rack, extend into big rack front end at the bulkhead gate of power station, big rack passes through crane
Boom is fixed temporarily；
Step 2 passes through longitudinal translation device, and jet stream suction Accrete clearing device is sent on water-bed Shamian Island；
Step 3, starting jet stream suction Accrete clearing device, carry out dredging to water-bed Shamian Island；
During step 4, dredging, the position that jet stream suctions Accrete clearing device is adjusted by longitudinal translation device and transverse sliding device
It sets, expands dredging range；
Big rack after dredging, is moved to next place using lifting and continues dredging at this by step 5, until power station is examined
Dredging at gate is repaired to finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212524.XA CN109811815A (en) | 2019-03-20 | 2019-03-20 | A kind of pneumatic type jet stream suction desilting system for power station bulkhead gate slot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910212524.XA CN109811815A (en) | 2019-03-20 | 2019-03-20 | A kind of pneumatic type jet stream suction desilting system for power station bulkhead gate slot |
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| Publication Number | Publication Date |
|---|---|
| CN109811815A true CN109811815A (en) | 2019-05-28 |
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ID=66609587
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910212524.XA Pending CN109811815A (en) | 2019-03-20 | 2019-03-20 | A kind of pneumatic type jet stream suction desilting system for power station bulkhead gate slot |
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| CN (1) | CN109811815A (en) |
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| JPS58168732A (en) * | 1982-03-31 | 1983-10-05 | Hitachi Techno Eng Co Ltd | Suction nozzle for dredger |
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2019
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| JPS58168732A (en) * | 1982-03-31 | 1983-10-05 | Hitachi Techno Eng Co Ltd | Suction nozzle for dredger |
| CN201567595U (en) * | 2009-11-12 | 2010-09-01 | 黄山云 | High-pressure water spray, reamer and drilling type sand sucking equipment |
| CN104975626A (en) * | 2015-07-13 | 2015-10-14 | 王胜利 | Portable high-pressure water jet ground heading equipment |
| CN105544546A (en) * | 2015-12-03 | 2016-05-04 | 上海建工一建集团有限公司 | Waste clearing and transporting device and method for underground engineering |
| CN106498997A (en) * | 2016-12-01 | 2017-03-15 | 昆明理工大学 | A kind of collection excavates the Accrete clearing device and dredging method that collects and carry one |
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