CN204739008U - Vertical submersible axial flow pump double-layer two-way channel system - Google Patents
Vertical submersible axial flow pump double-layer two-way channel system Download PDFInfo
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- CN204739008U CN204739008U CN201420795035.4U CN201420795035U CN204739008U CN 204739008 U CN204739008 U CN 204739008U CN 201420795035 U CN201420795035 U CN 201420795035U CN 204739008 U CN204739008 U CN 204739008U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
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- 238000004804 winding Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
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- 229910000831 Steel Inorganic materials 0.000 description 1
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Abstract
The utility model provides a double -deck two -way runner system of vertical dive axial -flow pump, includes support, upper runner and lower floor's runner, the upper strata runner is located the top of support, lower floor's runner is located the below of support, upper runner include effluent passageway and last diversion channels, passageway and lower diversion channels effluent under lower floor's runner includes, on effluent the passageway effluent under and between the passageway go up diversion channels and all control relative the setting down between the diversion channels, the vertical dive axial -flow pump of mid -mounting of support, vertical dive axial -flow pump intake the side with lower floor's runner intercommunication, the play water side of vertical dive axial -flow pump with upper strata runner intercommunication, on effluent and all install the valve in passageway and the last diversion channels. The utility model discloses the double -deck two -way runner system of vertical dive axial -flow pump that the reliability is good, engineering cost is lower, the suitability is good, the synchronism is good is obviously provided.
Description
Technical field
The utility model belongs to municipal administration, irrigation and water conservancy and chemical liquid field, relates to a kind of vertical submersible axial flow pump double-layer double-direction flow passage system.
Background technique
Vertical-type axial-flow pump is traditional water pump, civil engineering must be arranged factory building above water building; Need before activation inject lubrication water, need draw cooling water at transmission device during operation, proterctive equipment motor needs ventilation system, and oil system, hanging device, watch-dog, relates to specialty many, unit maintenance and management maintenance workload large; Water pump is by the restriction of cavitation conditions, and installation can not be too high, and motor limits by moistureproof and waterproof condition, motor layer is higher, and such water pump and motor, by major axis joint transmission, both increased engineering work load, make troubles to installation and maintenance again, because of connection set many pump workings inefficiency; At water drainage run duration, once the component malfunction under water such as water pump blade, maintenance not easily; Motor layer is in factory building, and noise is large, administrative staff's poor working environment; Top-out factory building and periphery water environment may be coordinated not.
Separate unit water pump is two-way go out to flow operating mode under, the application of vertical submersible axial flow pump market is few, the vertical submerged axial-flow pump assembly quantity of increase is adopted (only to go out stream or only drainage in practical application, belong to unidirectional runner unidirectional operation), or traditional vertical-type axial-flow pump reversible passage way traffic, or two-way management (lift is low; Flow is large; Units' installation foundation ditch is dark; Construction work amount and difficulty of construction large; Be different from the axial-flow pump of double-layer channel, when blade forward runs, pump efficiency is high, and during blade inverted running, pump efficiency is low).The economic value of vertical submersible axial flow pump and social benefit are difficult to play.
Existing flap valve is mainly arranged on rivers limit drainpipe outlet, and a kind of have the inlet non return check valve preventing outer water from pouring in down a chimney function.When rivers tidal level is higher than effluent pipe mouth, and when pressure is greater than overpressure, flap valve panel is closed automatically; When manifold pressure is greater than outer river pressure, flap valve overcomes deadweight and realizes opening, and interior water is arranged outward.The material of flap valve is divided into the multiple materials such as stainless steel, cast iron, shaped steel, composite material (glass fibre reinforced plastics).The developing direction of existing market flap valve is high-strength light, unlatching is rapid, loss of head is little.
Tradition flap valve is all unidirectional control, and net synchronization capability is better, more in the water outlet application of one-way water pump, can not be applied on two-way pump station.Two-way pump station adopts double-layer double-direction runner, and cutout adopts stop gate and hoist.According to winding type, hydraulic gate hoist parameters in series (SL507-2010, SL508-2010) (Ministry of Water Resources of the People's Republic of China), open a speed and be respectively 1.8 ~ 5m/s, 0.5 ~ 1.5m/s, there is starting gate and open the nonsynchronous shortcoming of water pump.The water impact that pump lock is asynchronous to be caused, overflow, be not very reliable double flow channel submersible pump machine to connection, can cause unit vibration even serious accident, and therefore the scheme arrangement there be limited evidence currently of of double flow channel submersible pump adopts; And the investment such as hoist and annex, Automated condtrol, micro computer monitoring is comparatively large, it is more that pumping plant management drops into energy.For concrete pump station engineering, gate opening/closing equipment investment increases by more than 1/2.
The defect that traditional vertical-type axial-flow pump exists: 1, motor layer Installation Elevation is high, be connected long with the pump shaft of water pump layer, easy break-down, such pumping plant also requires to build higher Standard for flood control; 2, engineering cost is high; 3, the occasion that improper water level amplitude is large.
Summary of the invention
In order to the deficiency that the reliability overcoming existing vertical-type axial-flow pump flow passage system is poor, engineering cost is high, applicability is poor, synchronism is poor, the utility model provides the vertical submersible axial flow pump double-layer double-direction flow passage system that a kind of reliability is good, engineering cost is lower, applicability is good, synchronism is good.
The utility model solves the technological scheme that its technical problem adopts:
A kind of vertical submersible axial flow pump double-layer double-direction flow passage system, comprise support, upper strata runner and lower floor's runner, described upper strata runner is positioned at the top of support, described lower floor runner is positioned at the below of support, described upper strata runner comprises circulation road and upper drainage channel, circulation road and lower drainage channel is gone out under described lower floor runner comprises, go out on described circulation road and under go out between circulation road, between described upper drainage channel and lower drainage channel, all left and right is oppositely arranged, the middle part installed vertical submersible axial flow pump of described support, the influent side of described vertical submersible axial flow pump and described lower floor flow passage, the water outlet side of described vertical submersible axial flow pump and described upper strata flow passage, equal mounted valve in circulation road and upper drainage channel is gone out on described.
Preferably, described valve is dual control flap valve, and described dual control flap valve comprises flap valve seat and door-slapping cover, hinged with described flap valve seat above described door-slapping cover, and described flap valve seat has the through hole flow through for fluid, the front cover of described door-slapping cover is on described through hole; Described flap valve also comprises still closes and the flap valve control system that can open in order to door-slapping cover under high pressure conditions inside flap valve, and the motion end of described flap valve control system coordinates with described door-slapping cover.The scheme of this dual control flap valve belongs to preferred version, and have advantages such as promoting net synchronization capability, certainly, described valve also can be other valves such as controllable gate or flap valve.
Further, go out circulation road on described, side that lower drainage channel is positioned at support, the first stop gate is installed in the side of described support, described first stop gate comprises the first elevator mechanism and the first valve, the lower end of described first elevator mechanism is connected with described first valve, and described first valve can be elevated from top to bottom and be sleeved on out in the valve opening of circulation road, lower drainage channel; Go out circulation road under described, opposite side that upper drainage channel is positioned at support, the opposite side of described support installs the second stop gate, described second stop gate comprises the second elevator mechanism and the second valve, the lower end of described second elevator mechanism is connected with described second valve, described second valve can be elevated from top to bottom and be sleeved on drainage channel, under go out in the valve opening of circulation road.
Further again, go out under described in circulation road and lower drainage channel and diaphragm and flow deflecting cone are installed.
Further, the top of described vertical submersible axial flow pump arranges pre-buried cover seat of manhole, and the side of described cover seat of manhole installs combined type inhalation valve or outlet pipe.
Described flap valve control system comprises align member and flap valve control gear, the back side of described door-slapping cover is provided with align member, the offside fixed component of described door-slapping cover hinged seat arranges flap valve control gear, described flap valve control gear comprises jacking component and the driven unit in order to control jacking component expanding-contracting action, the motion end of described driven unit is connected with described jacking component, when described jacking component is positioned at limit position, described jacking component top coordinates with described align member and clamps flap valve seat and door-slapping cover, when described jacking component is positioned at free position, described jacking component top is positioned at outside the unlatching trajectory of described door-slapping cover.The program is external scheme.
Described flap valve control system comprises align member, the front of described door-slapping cover is provided with align member, the offside fixed component of described flap valve seat hinged seat arranges flap valve control gear, described flap valve control gear comprises jacking component and the driven unit in order to control jacking component expanding-contracting action, the motion end of described driven unit is connected with described jacking component, when described jacking component is positioned at limit position, described jacking component top coordinates with described align member and clamps flap valve seat, when described jacking component is positioned at free position, described jacking component top is separated with described align member.The program is built-in scheme.
Preferably, described driven unit is hydraulic drive mechanism, pneumatic drive mechanism, electromagnetic drive mechanism, electric driving mechanism or mechanical driving mechanism.Described mechanical driving mechanism comprises drive motor, in order to the extending means by being converted to straight line motion.Certainly, other driving mode can also be adopted.
Further again, described dual control flap valve is the associating flap valve of at least two flap valve combinations.As required, each flap valve can be carried out conbined usage.
Described align member is provided with positioning hole, and the top of described jacking component is provided with positioning block, and described positioning block coordinates with described positioning hole.This is conventional fit system, also can adopt other modes.
The back side of described align member and door-slapping cover is in one.Which belongs to one-body molded, can be made by align member in the lump when making flap valve.
Described jacking component is push rod or jacking block.This is conventional selection mode, certainly, also can select other mode.
Technical conceive of the present utility model is: vertical submersible axial flow pump is the machine integrated structure of pump, there is triple combination seal and anti-leak, overtemperature and overcurrent protective device, due to vertical submersible axial flow pump all under water, without the need to top-out, cooling water, gas and oil system, installation and maintenance are simple and convenient; The leaking of electric pump, leak electricity, leakage of oil, the protection setting such as bearing overtemperature, motor overload are complete, safe and reliable, simple to operate, are beneficial to centralized control; Operate steadily, noise free, without temperature rise, especially do not need underwater operation, improve the operating environment of operation management personnel, alleviate labor intensity.During maintenance, the vertical submersible axial flow pump of on-the-spot lifting, whole water pump just can carry out generally maintaining routinely, changing impeller, mechanical seal, lubrication fatty oil, electric control cubicle debugging at hoist layer.All the other are as coil of stator of motor short circuit again winding, replacing motor bearings, water pump surface vacuum paint dipping, and Xu Fan factory maintains.
Double-layer double-direction runner: bilayer refers to the relative position of runner, lower floor is water inlet laminar flow road, and upper strata is water-yielding stratum runner; The two-way flow direction referring to runner liquid, from lower-left to upper right or from lower right to upper left, facade becomes " X " type.Runner can be double-deck, may also be empty van diaphragm type.Runner divides by line style curvilinerar figure (bell, elbow-type etc.), straight line type.Adopt reversible passage can cost saving about 30%, pumping plant test stand carries out methods of pump set model tests, result shows, reversible passage pump-unit performance and the unidirectional runner with suitable line style (large pumping station need increase flow deflecting cone and diaphragm) there is no notable difference.Water inlet flow channel exit velocity is evenly distributed, and in spiral case, streamline is smooth-going, has no in runner and has any position to produce nest band, backflow and whirlpool, have good conservancy property.Double-layer double-direction runner is applied generally in traditional water pump, belongs to mature technology.
Submersible pump adopts self coupling, socket joint with inlet and outlet channel, land and the mode such as load-bearing is connected; it connects affirmative and is not fixedly connected with firmly; submersible pump is the machine integrated structure of pump; there is triple combination seal and anti-leak, overtemperature and overcurrent protective device; running environment severe (under water, band high-tension electricity), submersible electric motor outlet cable is short, again can not Timeliness coverage if there is more serious vibration; pumping plant safe operation will be affected, even damage equipment.Under the condition not having reliable lock pump simultaneous techniques, the vertical submersible axial flow pump of Ministry of Water Resources's industry standard recommends unidirectional runner (vertical type borehole formula goes out stream installation, vertical type borehole open type goes out to flow installation).Traditional vertical axial-flow pump separated motor layer and water pump layer, all have reliable connection with main body, and motor layer keeps dry, slight asynchronous of lock pump, and overflow and the vibration of generation can not affect water pump assembly safe operation.
Unidirectionally can only operate (can open) to overcome traditional flap valve, having under high liquid level (HLL) and still closing and the dual control function that can open, achieve pump lock and open bi-directional synchronization function.For double-layer double-direction flow passage system, when water pump is opened, under fluid pressure effect, dual control flap valve achieves and is similar to that stop gate is opened under different hydraulics, closure function: during dual control flap valve state to be opened, belong to traditional flap valve, therefore net synchronization capability is better than stop gate; During controlled flap valve closed state, under the External Force Acting of flap valve control system, realize cutout function, sealing performance equals to stop gate, and traditional flap valve can only be opened under high liquid level (HLL), can not stop.Dual control flap valve is cheap, structure is simple, reliable, runs with water pump Complete Synchronization, make pumping plant that vibration and overflow accident can not occur, flap valve under the internal water high pressure in market can be met and to remain unchanged closedown and the product demand that can open.
The beneficial effects of the utility model are mainly manifested in: pump efficiency is high, and impeller floods, anti-Cavitation is good, run noise little, easy for installation, safeguard simple, civil engineering structure is simple, and integral layout energy-saving high-efficiency environment-friendly is attractive in appearance, engineering cost is low, and synchronism is good, specific as follows:
1) conventional axial flow pump motor layer Installation Elevation is high, and be connected long with the pump shaft of water pump layer, easy break-down, such pumping plant also requires to build higher Standard for flood control, and engineering cost is high.Submersible pump is arranged under water, does not affect by water level, is applicable to the occasion that water level amplitude is large.
2) submersible pump is electromechanical integrated product, move mode can be adopted to be connected with hydro-structure, be convenient to unified management, scheduling.Be applicable to flood control, drought control irrigation and draw water temporarily.
3) submersible pump runs under water, and can not build ground pump house, pump house is separated with control room, and noise is low, and good heat dissipation does not affect surrounding environment, can keep ground style and features.
4) pumping plant noise can be dropped to 75DB (A) below from 85 ~ 90dB (A) by submersible pump, is particularly suitable for the water drainage of construction in city, the use of blowdown pumping plant.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of vertical submersible axial flow pump double-layer double-direction flow passage system.
Fig. 2 is the schematic diagram of external dual control flap valve.
Fig. 3 is the schematic diagram of built-in dual control flap valve.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
With reference to Fig. 1, a kind of vertical submersible axial flow pump double-layer double-direction flow passage system, comprise support 6, upper strata runner 7 and lower floor's runner 8, described upper strata runner 7 is positioned at the top of support 6, described lower floor runner 8 is positioned at the below of support 6, described upper strata runner 7 comprises circulation road and upper drainage channel, circulation road and lower drainage channel is gone out under described lower floor runner 8 comprises, go out on described circulation road and under go out between circulation road, between described upper drainage channel and lower drainage channel, all left and right is oppositely arranged, the near middle installed vertical submersible axial flow pump 9 of described support 6, the influent side of described vertical submersible axial flow pump 9 is communicated with described lower floor runner 8, the water outlet side of described vertical submersible axial flow pump 9 is communicated with described upper strata runner 7, equal mounted valve 10 in circulation road and upper drainage channel is gone out on described.
Preferably, described valve 10 is dual control flap valve, and described dual control flap valve comprises flap valve seat 1 and door-slapping cover 2, hinged with described flap valve seat 1 above described door-slapping cover 2 side, described flap valve seat 1 has the through hole flow through for fluid, the front cover of described door-slapping cover 2 is on described through hole; Described flap valve also comprises still closes and the flap valve control system that can open in order to door-slapping cover under high pressure conditions inside flap valve, and the motion end of described flap valve control system coordinates with described door-slapping cover 2.The scheme of this dual control flap valve belongs to preferred version, and have advantages such as promoting net synchronization capability, certainly, described valve also can be other valves such as controllable gate or flap valve.
Further, go out circulation road on described, side that lower drainage channel is positioned at support 6, the first stop gate 11 is installed in the side of described support 6, described first stop gate 11 comprises the first elevator mechanism and the first valve, the lower end of described first elevator mechanism is connected with described first valve, and described first valve can be sleeved on out in the valve opening of circulation road, lower drainage channel from oscilaltion; Go out circulation road under described, opposite side that upper drainage channel is positioned at support 6, the opposite side of described support installs the second stop gate 12, described second stop gate 12 comprises the second elevator mechanism and the second valve, the lower end of described second elevator mechanism is connected with described second valve, described second valve can from oscilaltion and be sleeved on upper drainage channel, go out in the valve opening of circulation road.
Further again, go out under described in circulation road and lower drainage channel and diaphragm 13 and flow deflecting cone are installed.
Further, the top of described vertical submersible axial flow pump 9 arranges pre-buried cover seat of manhole 14, and the side of described cover seat of manhole 14 installs combined type inhalation valve 15 or outlet pipe.
With reference to Fig. 2, described flap valve control system comprises align member 3 and flap valve control gear, the back side of described door-slapping cover 2 is provided with align member 3, the offside fixed component of described door-slapping cover hinged seat arranges flap valve control gear, described flap valve control gear comprises jacking component 4 and the driven unit 5 in order to control jacking component expanding-contracting action, the motion end of described driven unit 5 is connected with described jacking component 4, when described jacking component 4 is positioned at highest order, described jacking component 4 top coordinates (now with described align member 3, flap valve can be made to be in closed condition), when described jacking component 4 is positioned at lowest order, described jacking component 4 top is positioned at described door-slapping cover and opens outside trajectory.The program is external scheme.
With reference to Fig. 3, described flap valve control system comprises align member 3, the front of described door-slapping cover 2 is provided with align member 3, flap valve control gear is arranged at the offside of described flap valve seat 1 hinged seat, described flap valve control gear comprises jacking component 4 and the driven unit 5 in order to control jacking component expanding-contracting action, the motion end of described driven unit 5 is connected with described jacking component 4, when described jacking component 4 is positioned at limit position, described jacking component 4 top coordinates with described align member 3 and clamps flap valve seat, when described jacking component 4 is positioned at free position, described jacking component 4 top is separated with described align member 3.The program is built-in scheme.
Described driven unit 5 is hydraulic drive mechanism, pneumatic drive mechanism, electromagnetic drive mechanism, electric driving mechanism or mechanical driving mechanism.Described mechanical driving mechanism comprises drive motor, in order to the extending means by being converted to straight line motion.Certainly, other driving mode can also be adopted.
Further again, described dual control flap valve is the associating flap valve of at least two flap valve combinations.As required, each flap valve can be carried out conbined usage.
Described align member 3 is provided with positioning hole, and the top of described jacking component 4 is provided with positioning block, and described positioning block coordinates with described positioning hole.This is conventional fit system, also can adopt other modes.
Described align member 3 is one with the back side of door-slapping cover 2.Which belongs to one-body molded, can be made by align member in the lump when making flap valve.
Described jacking component 3 is push rod or jacking block.This is conventional selection mode, certainly, also can select other mode.
In the present embodiment, the upper drainage side of upper strata runner 7 and on go out to flow side all according to described dual control flap valve 10, flap valve control system 5 pre-buried on the body construction (external), certain flap valve control system also can be built-in.Flap valve control system can be the schemes such as hydraulic pressure, pneumatic, electromagnetism, electric or mechanical hanging and releasing device.Controlling flap valve system makes traditional flap valve under high liquid level (HLL), have still closedown and the dual control function that can open.This control system illustrates for hydraulic solution.
First on traditional door-slapping cover 2, be welded with align member 3, pre-buried oil hydraulic cylinder on the body construction, the telescopic end of oil hydraulic cylinder can free-extension as jacking component 4.
The driven unit action of flap valve control system, control to hold out against align member 3 when jacking component 4 extends, now flap valve is locked, and door-slapping cover 2 is still in closed condition under the runner high liquid level (HLL) of upper strata; If when flap valve needs automatically to open, control jacking component 4 and retract to home position (non-evagination dashed lines states), the upper end of jacking component 4 is positioned at flap valve (containing being welded with component) and opens beyond trajectory, door-slapping cover 2 is state to be opened because Gravitative Loads is in, once open pump, the synchronous drainage of flap valve.
The flap valve control system of hydraulic solution takes full advantage of lever principle; simply small and exquisite; easy to process; during home position compact smooth, protection is good; be applicable to all types of flap valve of present situation; power saving is fast automatic; even manual hydraulic pressure installation (can pre-buried small-sized oil pipe; cause the operation of upper structural layer land) also can realize flap valve controlling functions; without the need to fast opening and closing equipment; just can realize pump and the two-way Complete Synchronization operation function of dual control flap valve, solve in two-way pump station, pump lock is opened can not Complete Synchronization or the disabled problem of traditional flap valve.
Vertical submersible axial flow pump is the machine integrated structure of pump, is arranged under water, and it connects affirmative and is not fixedly connected with firmly, in order to avoid vibration and overflow accident, uses vertical submersible axial flow pump, need better net synchronization capability between pump and gate valve in double-layer channel.Vertical submersible axial flow pump double-layer channel, dual control flap valve, the double take-off being applicable to all liq with go out to flow, door pump Complete Synchronization and only need a water pump.
The working procedure of vertical submersible axial flow pump double-layer double-direction runner is as follows:
Drainage: open the first stop gate 11 to such as figure dotted line position (closed upper strata runner), the dual control flap valve 10 being positioned at drainage channel is in state to be opened (i.e. traditional flap valve function), now, second stop gate 12 is in closed condition (being positioned at lower floor's runner), and the dual control flap valve above going out circulation road is in jacking closed condition under the effect of flap valve control system.Water pump is opened, and current from left to right, enter upper drainage channel by lower drain flow path, and under effect of water pressure, the dual control flap valve 10 of upper drainage channel is opened automatically, realizes diversion function.
Go out stream: open the second stop gate 12 to such as figure dotted line position (closed upper strata runner), on the dual control flap valve 10 gone out in circulation road be in state to be opened (i.e. traditional flap valve function), now, first stop gate 11 is in closed condition (being positioned at lower floor's runner), and the dual control flap valve in upper drainage channel is in jacking closed condition under the effect of flap valve control system.Water pump is opened, and current from right to left, enter upper strata runner by lower floor's runner, and under effect of water pressure, the dual control flap valve above gone out in circulation road is opened automatically, realizes effluent functions.
When the first stop gate 11 and the second stop gate 12 are in dotted line position, realize two pass cutout effect together with neighbouring dual control flap valve (jacking closed condition), avoid upper strata runner liquid backflow further.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420795035.4U CN204739008U (en) | 2014-12-15 | 2014-12-15 | Vertical submersible axial flow pump double-layer two-way channel system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420795035.4U CN204739008U (en) | 2014-12-15 | 2014-12-15 | Vertical submersible axial flow pump double-layer two-way channel system |
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| CN204739008U true CN204739008U (en) | 2015-11-04 |
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| CN201420795035.4U Expired - Lifetime CN204739008U (en) | 2014-12-15 | 2014-12-15 | Vertical submersible axial flow pump double-layer two-way channel system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500455A (en) * | 2014-12-15 | 2015-04-08 | 樊建苗 | Double-layer bidirectional flow passage system of vertical submersible axial-flow pump |
| CN106049596A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Water supply method and system |
| CN109235626A (en) * | 2018-10-31 | 2019-01-18 | 扬州大学 | Special-shaped thin board type eliminates reflux unit in a kind of box type bidirectional runner |
| CN109458353A (en) * | 2018-10-31 | 2019-03-12 | 扬州大学 | A kind of novel low lift reversible passage pumping plant starting-up method |
-
2014
- 2014-12-15 CN CN201420795035.4U patent/CN204739008U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500455A (en) * | 2014-12-15 | 2015-04-08 | 樊建苗 | Double-layer bidirectional flow passage system of vertical submersible axial-flow pump |
| CN106049596A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Water supply method and system |
| CN109235626A (en) * | 2018-10-31 | 2019-01-18 | 扬州大学 | Special-shaped thin board type eliminates reflux unit in a kind of box type bidirectional runner |
| CN109458353A (en) * | 2018-10-31 | 2019-03-12 | 扬州大学 | A kind of novel low lift reversible passage pumping plant starting-up method |
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