CN113107740A - Underground water supply and drainage dual-purpose energy recovery device and system - Google Patents

Underground water supply and drainage dual-purpose energy recovery device and system Download PDF

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Publication number
CN113107740A
CN113107740A CN202110393066.1A CN202110393066A CN113107740A CN 113107740 A CN113107740 A CN 113107740A CN 202110393066 A CN202110393066 A CN 202110393066A CN 113107740 A CN113107740 A CN 113107740A
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CN
China
Prior art keywords
water supply
drainage
unit
power
energy
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Pending
Application number
CN202110393066.1A
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Chinese (zh)
Inventor
陈清华
周保杰
张森
张斌
程迎松
张旭
王小润
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Anhui University of Science and Technology
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Anhui University of Science and Technology
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Publication date
Application filed by Anhui University of Science and Technology filed Critical Anhui University of Science and Technology
Priority to CN202110393066.1A priority Critical patent/CN113107740A/en
Publication of CN113107740A publication Critical patent/CN113107740A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00—Drainage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/02—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/06—Bearing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12—Blades; Blade-carrying rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/049—Roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Power Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention discloses an underground water supply and drainage dual-purpose energy recovery device and system. The water supply power unit converts the potential energy of water at a water supply end into mechanical energy; the power generation energy recovery unit converts the mechanical energy generated by the water supply power unit into electric energy and stores the electric energy; the drainage power assisting unit is driven by the water supply power unit, the working load of the underground drainage pump can be reduced when the drainage power assisting unit works normally, and the impact of backflow water on the ratchet wheel type impeller and the influence of the reverse rotation of the ratchet wheel type impeller on the power output control unit are reduced when the drainage is finished; the power output control unit reasonably distributes the energy generated by the water supply power unit to other units, so that the utilization efficiency of the system energy is improved.

Description

Underground water supply and drainage dual-purpose energy recovery device and system
The technical field is as follows:
the invention relates to the technical field of mining hydraulic energy recovery, in particular to an underground water supply and drainage dual-purpose energy recovery device and system
Background art:
in the existing mine exploitation process, the problem of overhigh water pressure can be caused when water is supplied to the underground from the ground due to the fact that large elevation difference exists in certain exploitation areas. In order to avoid pipe explosion accidents caused by overhigh water supply pressure of a mining area with lower elevation, a central decompression processing water pump is arranged in a main roadway and is used for reducing the water pressure and then delivering the water pressure to the mining area with lower elevation. The treatment method solves the problem of overhigh water pressure to a certain extent, but still has the disadvantages of being not small. Firstly, the central pressure reduction treatment water pump needs to be strictly supervised by manpower, and the labor intensity of workers is high, so that certain requirements on human resources are met. Secondly, the central decompression processing water pump and the transportation pipeline equipment need to be maintained and repaired, which causes great expenditure and great influence on the economic benefit of enterprises. In addition, the central pressure reduction treatment water pump consumes electric energy in the operation process and accounts for a large proportion of the total resource expenditure.
When the depth of the mine reaches the height of the underground water level, the condition of water outlet of a mine tunnel can occur, namely water gushes in the underground coal mine. In the coal mine, water flowing out of a roadway naturally flows into a sump for simple sedimentation, then the water gushing from the mine is pumped to the ground by using a drainage pump, and the drainage pump with high power is used for drainage due to the drainage height. However, rock dust and coal dust exist in mine water, and long-time high-power work can accelerate abrasion of a water pump impeller, so that the service life of a drainage pump is shortened, and the maintenance cost is increased.
Therefore, the invention designs a dual-purpose energy recovery device and system for underground water supply and drainage, and solves the problems.
The invention content is as follows:
aiming at the defects of the prior art, the invention discloses an underground water supply and drainage dual-purpose energy recovery device and system, which are realized by the following technical scheme:
a dual-purpose energy recovery device and system for underground water supply and drainage comprises: the system comprises a water supply power unit, a power generation energy recovery unit, a drainage power assisting unit and a power output control unit; the power output control unit is connected above the water supply power unit through a first stepped shaft; the power generation energy recovery unit is connected to the right side of the power output control unit through a coupler; the drainage boosting unit is connected to the left side of the power output control unit through a bevel gear pair.
The feedwater power unit includes: the device comprises a water supply end inlet pipeline, a first supporting seat, a water supply end cover, a water supply end outlet pipeline, a water supply end box body, a first stepped shaft, a first deep groove ball bearing, a second deep groove ball bearing, a tapered roller bearing, a power impeller fixing supporting plate and a power impeller. Wherein the water supply end inlet pipeline and the water supply end outlet pipeline are fixed on the water supply end box body; the first deep groove ball bearing, the second deep groove ball bearing and the tapered roller bearing are sequentially fixed on the first stepped shaft, and a first supporting seat is sleeved on the outer side of the first stepped shaft; the power impeller is connected with the first stepped shaft through a spline and is fixed through a power impeller fixing support plate; the first stepped shaft is fixed on the water supply end cover through a tapered roller bearing and a shaft shoulder; the water supply end cover is fixed on the water supply end box body through a bolt; the first supporting seat is fixed on the water supply end cover through a bolt.
The electricity generation energy recovery unit includes: explosion-proof shell, group battery, generator. Wherein the battery pack and the generator are arranged in the explosion-proof shell through electric wires; the battery pack is connected with the generator through an electric wire, and the electric energy generated by the generator is directly stored in the battery pack.
The drainage boosting unit includes: the device comprises a drainage end outlet pipeline, a drainage end cover, a drainage end box body, a drainage end inlet pipeline, a second supporting seat, a third deep groove ball bearing, a fifth stepped shaft, a fourth deep groove ball bearing, a ratchet wheel type impeller upper fixing plate, a ratchet wheel type impeller lower supporting plate, a fifth deep groove ball bearing and a ratchet wheel type impeller. Wherein the outlet pipeline of the drainage end and the inlet pipeline of the drainage end are fixed on the box body of the water supply end; the third deep groove ball bearing and the fourth deep groove ball bearing are sequentially fixed on the first stepped shaft, and a second supporting seat is sleeved on the outer side of the first stepped shaft; the ratchet wheel type impeller is fixed on the fifth stepped shaft through a ratchet wheel type impeller upper fixing plate and a ratchet wheel type impeller lower supporting plate; the fifth deep groove ball bearing is fixed on the lower side of the fifth stepped shaft and is arranged on a bearing seat at the bottom of the drainage end box body; the drainage end cover is fixed on the drainage end box body through a bolt; the second supporting seat is fixed on the water supply end cover through a bolt.
The power output control unit includes: the power output control unit comprises a shell, a coupler, a bevel gear pair, a sixth deep groove ball bearing, a fourth stepped shaft, a seventh deep groove ball bearing, an electromagnetic clutch, a third stepped shaft, a second differential lock, a differential lock, an eighth deep groove ball bearing, a first differential lock, a second stepped shaft and a controller. The right side of the differential is connected with a second step shaft, and the left side of the differential is connected with a third step shaft; the eighth deep groove ball bearing and the left side of the coupler are fixed on the second stepped shaft; the right side of the coupler is fixed on the input shaft of the generator; the first differential lock is concentric with the second stepped shaft and is fixed on the power output control unit shell; the second differential lock is concentric with the third stepped shaft and is fixed on the power output control unit shell; the right side of the electromagnetic clutch is fixed with a third stepped shaft, and the left side of the electromagnetic clutch is fixed with a fourth stepped shaft; a sixth deep groove ball bearing and a seventh deep groove ball bearing are fixed on the fourth stepped shaft; the right side of the bevel gear pair is fixed on the fourth stepped shaft, and the lower side of the bevel gear pair is fixed on the fifth stepped shaft; the controller is connected with the first differential lock, the second differential lock and the electromagnetic clutch through leads and is fixed on the power output control unit shell; the power output control unit shell is fixed with the first supporting seat and the second supporting seat through bolts.
Description of the drawings:
the technical solution of the present invention will be further specifically described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the overall structure of the apparatus and system of the present invention;
FIG. 2 is a schematic view of the water supply power unit of the present invention;
FIG. 3 is a schematic diagram of the structure of the power generation energy recovery unit of the present invention;
FIG. 4 is a schematic view of the drainage booster unit of the present invention;
fig. 5 is a schematic diagram of the power output control unit structure of the present invention.
Number designation in the figures: 1-drainage end outlet pipeline, 2-power output control unit shell, 3-water supply end inlet pipeline, 4-explosion-proof shell, 5-coupler, 6-first support seat, 7-water supply end cover, 8-water supply end outlet pipeline, 9-water supply end box body, 10-water discharge end cover, 11-drainage end box body, 12-drainage end inlet pipeline, 13-fixing table, 14-second support seat, 15-first step shaft, 16-first deep groove ball bearing, 17-second deep groove ball bearing, 18-conical roller bearing, 19-power impeller fixing support plate, 20-power impeller, 21-battery pack, 22-generator, 23-third deep groove ball bearing, 24-fifth step shaft, 25-fourth deep groove ball bearing, 26-ratchet wheel type impeller upper fixing plate, 27-ratchet wheel type impeller lower supporting plate, 28-fifth deep groove ball bearing, 29-ratchet wheel type impeller, 30-bevel gear pair, 31-sixth deep groove ball bearing, 32-fourth stepped shaft, 33-seventh deep groove ball bearing, 34-electromagnetic clutch, 35-third stepped shaft, 36-second differential lock, 37-differential, 38-eighth deep groove ball bearing, 39-first differential lock, 40-second stepped shaft and 41-controller.
The specific implementation mode is as follows:
the invention is further illustrated by the following specific examples. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, in the water supply power unit, a water supply end inlet pipe 3 and a water supply end outlet pipe 8 are fixed on a water supply end tank 9; a first deep groove ball bearing 16, a second deep groove ball bearing 17 and a tapered roller bearing 18 are sequentially fixed on the first step shaft 15, and a first support seat 6 is sleeved on the outer side of the first deep groove ball bearing; the power impeller 20 is connected with the first step shaft 15 through a spline and is fixed through a power impeller fixing support plate 19; the first stepped shaft 15 is fixed on the water supply end cover 7 through a tapered roller bearing 18 and a shaft shoulder; the water supply end cover 7 is fixed on the water supply end box body 9 through bolts; the first supporting seat 6 is fixed on the water supply end cover 7 through bolts. When the water supply end water inlet pipeline starts to supply water, because the water supply port and the water supply power unit have large height difference, the water has large potential energy, the gravitational potential energy of the water flow is converted into kinetic energy, the high-speed water flow impacts the power impeller 20 to drive the power impeller 20 to rotate, the potential energy of the water flow is converted into mechanical energy of the power impeller 20, and the converted mechanical energy is transmitted to the power output control unit through the first stepped shaft 15.
Referring to fig. 5, in the power output control unit, the differential 37 is connected to the second step shaft 40 on the right side and to the third step shaft 35 on the left side; the eighth deep groove ball bearing 38 and the left side of the coupler 5 are fixed on the second stepped shaft 40; the right side of the coupling 5 is fixed on the input shaft of the generator 22; the first differential lock 39 is concentric with the second stepped shaft 40 and fixed to the power output control unit case 2; the second differential lock 36 is concentric with the third step shaft 35 and is fixed on the power output control unit casing 2; the right side of the electromagnetic clutch 34 is fixed on the third stepped shaft 35, and the left side is fixed on the fourth stepped shaft 32; the sixth deep groove ball bearing 31 and the seventh deep groove ball bearing 33 are fixed on the fourth stepped shaft 32; the right side of the bevel gear pair 30 is fixed on the fourth stepped shaft 32, and the lower side is fixed on the fifth stepped shaft 24; the controller 41 is connected with the first differential lock 39, the second differential lock 36 and the electromagnetic clutch 34 through leads and is fixed on the power output control unit shell 2; the power output control unit casing 2 is fixed to the first support base 6 and the second support base 14 by bolts. When the water drainage is not needed, the controller 41 controls the second differential 36 to lock the third stepped shaft 35 and open the first differential lock 39, and at the moment, the power output control unit transmits the mechanical energy transmitted in the water supply power unit to the power generation energy recovery unit; when drainage is needed, the controller 41 controls the first differential lock 39 to lock the second stepped shaft 40, opens the second differential lock 36, and controls the electromagnetic clutch 34 to close, so that the third stepped shaft 35 is connected with the fourth stepped shaft 32, and at the moment, the power output control unit transmits the mechanical energy generated by the water supply power unit to the water supply and drainage power assisting unit through a gear; when the rotational speed of the ratchet-type impeller 29 at the drain end is greater than the rotational speed which can be provided to the ratchet-type impeller 29 by the water supply power unit, the controller 41 controls the electromagnetic clutch 34 to disconnect the third stepped shaft 35 from the fourth stepped shaft 32, thereby reducing the energy loss at the drain end.
Referring to fig. 3, in the electricity generation energy recovery unit, a battery pack 21 and a generator 22 are mounted in an explosion-proof case through electric wires. The battery pack 21 is connected with the generator 22 through an electric wire, the generator 22 is connected with a second step shaft 40 in the power output control unit through a coupler 5, and mechanical energy transmitted from the water supply power unit is converted into electric energy to be directly stored in the battery pack.
Referring to fig. 4, in the drainage booster unit, a drainage end outlet pipe 1 and a drainage end inlet pipe 12 are fixed on a water supply end tank 11; the third deep groove ball bearing 23 and the fourth deep groove ball bearing 25 are sequentially fixed on the fifth stepped shaft 24, and the second supporting seat 14 is sleeved on the outer side of the fifth stepped shaft; the ratchet wheel type impeller 29 is fixed on the fifth stepped shaft 24 through a ratchet wheel type impeller upper fixing plate 26 and a ratchet wheel type lower supporting plate 27; a fifth deep groove ball bearing 28 is fixed at the lower side of the fifth stepped shaft 24 and is arranged on a bearing seat at the bottom of the drainage end box body 11; the drainage end cover 10 is fixed on the drainage end box body 11 through bolts; the second support seat 14 is fixed to the drain end cover 10 by bolts. The fourth stepped shaft 32 is connected with the fifth stepped shaft 24 through a bevel gear pair 30, and mechanical energy transmitted from the water supply power unit drives the ratchet wheel type impeller 29 to rotate so as to assist underground drainage and reduce the working load of the underground drainage pump; when the water discharge is finished, since the ratchet type impeller 29 is not prevented from reversely rotating, the impact of the reversely flowing water on the ratchet type impeller 29 and the influence of the reverse rotation of the ratchet type impeller 29 on the power output control unit can be reduced.

Claims (5)

1. The utility model provides a dual-purpose energy recuperation device of drainage and water supply in pit and system which characterized in that includes: the system comprises a water supply power unit, a power generation energy recovery unit, a drainage power assisting unit and a power output control unit; the power output control unit is connected above the water supply power unit through a first stepped shaft (15); the power generation energy recovery unit is connected to the right side of the power output control unit through a coupler (5); the drainage boosting unit is connected to the left side of the power output control unit through a bevel gear pair (30).
2. The underground water supply and drainage dual-purpose energy recovery device and system according to claim 1, wherein a power impeller (20) and a first stepped shaft (15) are arranged in the water supply power unit, and the potential energy of water at a water supply end is converted into mechanical energy and transmitted.
3. A downhole dual-purpose water supply and drainage energy recovery device and system according to claim 1, wherein a generator (22) and a battery pack (21) are arranged in the power generation energy recovery unit, so that mechanical energy generated by the water supply power unit is converted into electric energy and stored.
4. The underground water supply and drainage dual-purpose energy recovery device and system according to claim 1, wherein the drainage power assisting unit is provided with a ratchet mechanism, the ratchet mechanism is driven by the water supply power unit through gear transmission, and the working load of the underground drainage pump can be relieved during normal operation; when the water discharge is finished, the impact of the backflow water on the ratchet wheel type impeller (29) and the influence of the reverse rotation of the ratchet wheel type impeller (29) on the power output control unit are reduced.
5. The underground water supply and drainage dual-purpose energy recovery device and system according to claim 1, wherein a differential (37), a first differential lock (39), a second differential lock (36), an electromagnetic clutch (34) and a controller (41) are arranged in the power output control unit, when water drainage is not needed, the controller (41) controls the second differential lock (36) to lock the third stepped shaft (35), the first differential lock (39) is opened, and mechanical energy generated by the water supply power unit is only used for power generation of the generator (22); when water needs to be drained, the controller (41) controls the first differential lock (39) to lock the second stepped shaft (40), the second differential lock (36) is opened, the electromagnetic clutch (34) is controlled to be closed, the third stepped shaft (35) is connected with the fourth stepped shaft (32), and mechanical energy generated by the water supply power unit is only used for draining water at a drainage end through gear transmission; when the rotating speed of the ratchet type impeller (29) at the drainage end is greater than that of the ratchet type impeller (29) which can be provided by the water supply power unit, the controller (41) controls the electromagnetic clutch (34) to disconnect the third stepped shaft (35) from the fourth stepped shaft (32), and the energy loss at the drainage end is reduced. The power output control unit reasonably distributes energy to other units, and the utilization efficiency of the system energy is improved.
CN202110393066.1A 2021-04-12 2021-04-12 Underground water supply and drainage dual-purpose energy recovery device and system Pending CN113107740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110393066.1A CN113107740A (en) 2021-04-12 2021-04-12 Underground water supply and drainage dual-purpose energy recovery device and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110393066.1A CN113107740A (en) 2021-04-12 2021-04-12 Underground water supply and drainage dual-purpose energy recovery device and system

Publications (1)

Publication Number Publication Date
CN113107740A true CN113107740A (en) 2021-07-13

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Application Number Title Priority Date Filing Date
CN202110393066.1A Pending CN113107740A (en) 2021-04-12 2021-04-12 Underground water supply and drainage dual-purpose energy recovery device and system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117646728A (en) * 2024-01-30 2024-03-05 四川川工泵业有限公司 Double-channel rotary jet pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117646728A (en) * 2024-01-30 2024-03-05 四川川工泵业有限公司 Double-channel rotary jet pump
CN117646728B (en) * 2024-01-30 2024-05-03 四川川工泵业有限公司 Double-channel rotary jet pump

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