CN109356782B - Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering - Google Patents

Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering Download PDF

Info

Publication number
CN109356782B
CN109356782B CN201811469586.0A CN201811469586A CN109356782B CN 109356782 B CN109356782 B CN 109356782B CN 201811469586 A CN201811469586 A CN 201811469586A CN 109356782 B CN109356782 B CN 109356782B
Authority
CN
China
Prior art keywords
water
water lifting
lifting tank
flow
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811469586.0A
Other languages
Chinese (zh)
Other versions
CN109356782A (en
Inventor
江礼为
后开祥
傅泳滔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PowerChina Guiyang Engineering Corp Ltd
Original Assignee
PowerChina Guiyang Engineering Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PowerChina Guiyang Engineering Corp Ltd filed Critical PowerChina Guiyang Engineering Corp Ltd
Priority to CN201811469586.0A priority Critical patent/CN109356782B/en
Publication of CN109356782A publication Critical patent/CN109356782A/en
Application granted granted Critical
Publication of CN109356782B publication Critical patent/CN109356782B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00Other machines or engines
    • F03B17/02Other machines or engines using hydrostatic thrust
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03BMACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The invention discloses a buoyancy water lifting device and a buoyancy water lifting method for hydraulic and hydroelectric engineering, comprising a base, wherein a water lifting tank is arranged on the base, two side walls of the water lifting tank are provided with flow pipes, one ends of the flow pipes extend into the water lifting tank and are sleeved with a mounting sleeve, the other ends of the flow pipes are mutually communicated with through holes formed in the side walls of a flow blocking cavity formed in the base, a one-way valve is arranged at the joint of the flow pipes and the flow blocking cavity, the bottom of the flow blocking cavity is provided with internal threads and is in threaded connection with the threaded sleeve, and floating balls are placed in the flow pipes in the water lifting tank; the outer side wall of the water lifting tank is fixedly provided with air bags distributed in a threaded mode, an air inlet of each air bag is fixedly connected with one end of an air pipe, the upper surface of the water lifting tank is fixedly provided with an exhaust valve and a water outlet, and a valve is fixedly arranged on the water outlet. According to the invention, through the action of the floating ball, the water lifting box can be automatically opened and choked, so that the water lifting box can be filled with water, and the flexibility of the equipment is improved.

Description

Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering
Technical Field
The invention relates to hydraulic and hydroelectric engineering equipment, in particular to a buoyancy water lifting device for hydraulic and hydroelectric engineering.
Background
The traditional buoyancy water lifting device for water conservancy and hydropower is complex in structure, the mounting frame is of a fixed structure, water level change of rivers, lakes and seas cannot be adapted, engineering cost is high, follow-up facilities and maintenance cost are high, if manpower is needed, the height of the water lifting device can be adjusted according to the water level, labor cost and management cost are high, meanwhile, most of the traditional buoyancy water lifting device can only be used in flowing water to lift water to a certain height, and when the buoyancy water lifting device is used in still water, a motor is needed to drive rotation of a waterwheel to lift the water to a certain height, so that the water lifting effect is poor, and the buoyancy water lifting device for water conservancy and hydropower engineering is inconvenient to use.
Disclosure of Invention
The invention aims to provide a buoyancy water lifting device and a buoyancy water lifting method for hydraulic and hydroelectric engineering, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention relates to a buoyancy water lifting device for hydraulic and hydroelectric engineering, which comprises a base, wherein a water lifting tank is fixedly arranged on the upper surface of the base, flow pipes are fixedly arranged on the two side walls of the water lifting tank, each flow pipe is in a clip shape, one end of each flow pipe extends into the water lifting tank and is sleeved with a mounting sleeve, the other end of each flow pipe is mutually communicated with a through hole formed in the side wall of a flow blocking cavity formed in the base, a one-way valve is arranged at the joint of each flow pipe and the flow blocking cavity, the upper end and the lower end of each flow blocking cavity are semicircular, the bottom of each flow blocking cavity is provided with internal threads and is in threaded connection with a thread sleeve, and floating balls are placed in the flow pipes in the water lifting tank and have the same diameters as the flow pipes; the outer side wall fixed mounting of water lifting tank has the gasbag of screw thread distribution, and the air inlet and the tracheal one end fixed connection of gasbag, four equal fixed hook seats of corner of water lifting tank upper surface, and four fixed hook seats all are connected with the lantern ring through the steel wire, the last fixed surface of water lifting tank installs discharge valve and outlet, and fixed mounting has the valve on the outlet.
As a further scheme of the invention: the one-way valve consists of a valve body, a rotating shaft and a triangular baffle plate, a circular through hole is formed in the valve body, a plurality of annularly arranged sleeves are mounted on the outer side wall of the through hole, the rotating shaft is inserted into the sleeves, a pressure spring is sleeved on the rotating shaft, and the rotating shaft is fixedly connected with the triangular baffle plate through a connecting rod.
As a further scheme of the invention: the thread bush is provided with a through cavity which is annularly arranged, and the through cavity is fixedly provided with a filter screen.
As a further scheme of the invention: the floating ball is made of rubber.
As a further scheme of the invention: the surface fixing sleeve of the flow tube is sheathed with a tightly attached rubber sleeve.
As a further scheme of the invention: the top of the water lifting tank is provided with a movable door for replacing the installation sleeve, and the movable door is provided with a plane lock.
The beneficial effects of the invention are as follows:
1. according to the invention, through the action of the floating ball, the water lifting box can be automatically opened and choked, so that the water lifting box can be filled with water, and the flexibility of the equipment is improved.
2. According to the invention, the air bag is inflated through the air pump, after the air bag is inflated, the buoyancy of the device is increased, so that the water lifting tank floats upwards, and after the water lifting tank floats on the water surface, the floating ball is mutually attached to the lower cavity opening in the flow blocking cavity under the action of water pressure, and is in a flow blocking state at the moment, so that the water loss in the water lifting tank is avoided, and the water lifting work is completed.
Drawings
FIG. 1 is a schematic diagram of the floating ball flow opening structure in the present invention;
FIG. 2 is a schematic view of the structure of the thread bushing according to the present invention;
FIG. 3 is a schematic view of the structure of the floating ball for blocking flow in the present invention;
FIG. 4 is a schematic elevational view of the present invention;
fig. 5 is a schematic structural view of a check valve according to the present invention.
Reference numerals illustrate: the device comprises a base, a water lifting tank, a 3-flow pipe, a 4-mounting sleeve, a 5-floating ball, a 6-one-way valve, a 7-choke cavity, an 8-thread sleeve, a 9-filter screen, a 10-exhaust valve, an 11-air bag, a 12-air pipe, a 13-fixed hook seat, a 14-steel wire, a 15-valve body, a 16-rotating shaft and a 17-triangular baffle.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Referring to fig. 1, the buoyancy water lifting device for hydraulic and hydroelectric engineering of the invention comprises a base 1, wherein a water lifting tank 2 is fixedly arranged on the upper surface of the base 1, a movable door (not shown in the figure) for replacing a mounting sleeve 4 is arranged at the top of the water lifting tank 2, a plane lock is arranged on the movable door, two side walls of the water lifting tank 2 are fixedly provided with a flow pipe 3, the flow pipe 3 is in a clip shape, one end of the flow pipe 3 extends into the water lifting tank 2 and is sleeved with the mounting sleeve 4, the other end of the flow pipe 3 is mutually communicated with a through hole formed in the side wall of a choke cavity 7 formed in the base 1, and a one-way valve 6 is arranged at the joint of the flow pipe 3 and the choke cavity 7.
Referring to fig. 5, the check valve 6 is composed of a valve body 15, a rotating shaft 16 and a triangular baffle 17, a circular through hole is formed in the valve body 15, a plurality of annularly arranged sleeves are mounted on the outer side wall of the through hole, the rotating shaft 16 is inserted into the sleeves, a pressure spring is sleeved on the rotating shaft 16, the rotating shaft 16 is fixedly connected with the triangular baffle 17 through a connecting rod, when the triangular baffle 17 receives an external force to one side of the choke cavity 7, the triangular baffle 17 drives the rotating shaft 16 to rotate and compress the pressure spring to form an open state, and when the triangular baffle 17 receives an external force to one side of the flow tube 3, the triangular baffle 17 receives the acting force of the rotating shaft 16 and compression, so that the triangular baffle 17 is still in a closed state; the upper and lower ends of the choke cavity 7 are semicircular, the bottom of the choke cavity 7 is provided with internal threads and is in threaded connection with the threaded sleeve 8, the threaded sleeve 8 is provided with an annular through cavity, referring to fig. 2, a filter screen 9 is fixedly arranged on the through cavity, the phenomenon that impurities in water enter the water tank 2 and cause blockage when the water tank 2 is used for taking water is reduced, a floating ball 5 is placed in a flow pipe 3 in the water tank 2, the floating ball 5 is made of rubber, and the diameter of the floating ball 5 is the same as that of the flow pipe 3.
Referring to fig. 4, an air bag 11 with threads distributed is fixedly installed on the outer side wall of the water lifting tank 2, an air inlet of the air bag 11 is fixedly connected with one end of an air pipe 12, four corners of the upper surface of the water lifting tank 2 are fixedly provided with fixed hook seats 13, the four fixed hook seats 13 are connected with a lantern ring through steel wires 14, the upper surface of the water lifting tank 2 is fixedly provided with an exhaust valve 10 and a water outlet (not shown in the figure), and a valve is fixedly installed on the water outlet.
Before use, please refer to fig. 1, the floating ball is in an open flow state at this time because it is in the flow tube 3 sleeved with the mounting sleeve 4 under the action of gravity of the floating ball, and is fixedly connected with one end of the air tube 12 (the air tube 12 is long enough) through the exhaust end of the exhaust pump, and meanwhile, after being fixedly connected with the lantern ring through the connecting wire, the floating ball can be lifted up by a lifting device such as a manual work or a lifter (the scheme does not provide a specific lifting device, and a user selects a scheme according to specific conditions).
When the device is used, the device is placed in water, as water flows into the water lifting tank 2 through the flow blocking cavity 7 formed in the base 1 (at the moment, the check valve 6 is in a closed state), along with the increase of the water in the water lifting tank 2, the air in the water lifting tank 2 is discharged through the exhaust valve 10, the water lifting tank 2 on the liquid level gradually sinks until the water rises into the flow pipe 3 and pushes the floating ball 5 to move along the flow pipe 3, when the water in the water lifting tank 2 is higher than the flow pipe 3, the floating ball 5 slides to the lowest point of the flow pipe 3 and slides into the flow blocking cavity 7 through the check valve 6, and due to the action of the floating force, the floating ball 5 is mutually attached to an upper cavity opening in the flow blocking cavity 7, so that the water cannot enter the water lifting tank 2, and at the moment, the water lifting tank 2 is submerged under the water surface, and the water loading task of the water lifting tank 2 is completed.
After the air pump is started to inflate the air bag 11, the buoyancy of the equipment is increased (meanwhile, the equipment can be lifted by cooperating with manpower or by lifting devices such as a lifter) after the air bag 11 is inflated, so that the water lifting tank 2 floats upwards, after the water lifting tank 2 floats on the water surface, referring to fig. 3, the floating ball 5 is mutually attached to the lower cavity opening in the choke cavity 7 due to the action of water pressure, and the air bag is in a choke state at the moment, so that the water loss in the water lifting tank 2 is avoided, and the water lifting work is completed.
In this scheme, after once carrying water finishes, through opening the valve on the outlet and draining the water liquid in carrying water tank 2, dismantle threaded sleeve 8, take out the floater 5 in the choked flow chamber 7, then take off installation cover 4 after opening the dodge gate at carrying water tank 2 top, put into installation cover 4 behind the flow pipe 3 with floater 5, prepare for next water carrying work.
The circuits and control involved in the present invention are all of the prior art, and are not described in detail herein.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, and yet fall within the scope of the invention.

Claims (5)

1. The utility model provides a buoyancy water lifting device for hydraulic and hydroelectric engineering which characterized in that: the novel water lifting device comprises a base (1), wherein a water lifting tank (2) is fixedly arranged on the upper surface of the base (1), a flow pipe (3) is fixedly arranged on two side walls of the water lifting tank (2), the flow pipe (3) is a clip type, one end of the flow pipe (3) extends into the water lifting tank (2) and is sleeved with a mounting sleeve (4), the other end of the flow pipe (3) is mutually communicated with a through hole formed in the side wall of a flow blocking cavity (7) formed in the base (1), a one-way valve (6) is arranged at the joint of the flow pipe and the flow blocking cavity (7), the upper end and the lower end of the flow blocking cavity (7) are semicircular, an inner thread is formed in the bottom of the flow blocking cavity (7) and is in threaded connection with a thread sleeve (8), and a floating ball (5) is placed in the flow pipe in the water lifting tank (2), and the diameter of the floating ball (5) is the same as the diameter of the flow pipe (3). The outer side wall of the water lifting box (2) is fixedly provided with an air bag (11) in threaded distribution, an air inlet of the air bag (11) is fixedly connected with one end of an air pipe (12), four corners of the upper surface of the water lifting box (2) are fixedly provided with fixed hook seats (13), the four fixed hook seats (13) are connected with a lantern ring through steel wires (14), the upper surface of the water lifting box (2) is fixedly provided with an exhaust valve (10) and a water outlet, and a valve is fixedly arranged on the water outlet; the one-way valve (6) consists of a valve body (15), a rotating shaft (16) and a triangular baffle plate (17), a circular through hole is formed in the valve body (15), a plurality of annularly arranged sleeves are mounted on the outer side wall of the through hole, the rotating shaft (16) is inserted into the sleeves, a pressure spring is sleeved on the rotating shaft (16), and the rotating shaft (16) is fixedly connected with the triangular baffle plate (17) through a connecting rod; when the triangular baffle plate (17) receives an external force to one side of the choke cavity (7), the triangular baffle plate (17) drives the rotating shaft (16) to rotate and compress the pressure spring to form an opening state, and when the triangular baffle plate (17) receives an external force to one side of the flow pipe (3), the triangular baffle plate (17) receives an acting force of the rotating shaft (16) and compression, so that the triangular baffle plate is still in a closing state; the thread sleeve (8) is provided with a circular through cavity, and a filter screen (9) is fixedly arranged on the through cavity.
2. The buoyancy lift for hydraulic and hydroelectric engineering according to claim 1, wherein: the floating ball (5) is made of rubber.
3. The buoyancy lift for hydraulic and hydroelectric engineering according to claim 1, wherein: the surface of the flow pipe (3) is fixedly sleeved with a tightly attached rubber sleeve.
4. The buoyancy lift for hydraulic and hydroelectric engineering according to claim 1, wherein: the top of the water lifting box (2) is provided with a movable door for replacing the installation sleeve (4), and the movable door is provided with a plane lock.
5. A method of buoyancy lift using the apparatus of any one of claims 1-4, comprising the steps of: placing the device into water, arranging a flow blocking cavity (7) on a base (1), enabling water to flow into a water lifting tank (2), and enabling the water in the water lifting tank (2) to be discharged through an exhaust valve (10) along with the increase of the water in the water lifting tank (2), wherein the water lifting tank (2) on the liquid level gradually sinks until the water rises into a flow pipe (3) and pushes a floating ball (5) to move along the flow pipe (3), and when the water in the water lifting tank (2) is higher than the flow pipe (3), the floating ball (5) slides to the lowest point of the flow pipe (3) and slides into the flow blocking cavity (7) through a one-way valve (6), and the floating ball (5) is attached to an upper cavity opening in the flow blocking cavity (7) due to the action of a floating force, so that the water cannot enter the water lifting tank (2), and the water lifting tank (2) is submerged, and the water lifting tank (2) is immersed down at the moment, so that the water loading task of the water lifting tank (2) is completed; the air pump is started to inflate the air bag (11), after the air bag (11) is inflated, the buoyancy of the device is increased, so that the water lifting tank (2) floats upwards, after the water lifting tank (2) floats on the water surface, the floating ball (5) is mutually attached to the lower cavity opening in the flow blocking cavity (7) due to the action of water pressure, and the air pump is in a flow blocking state at the moment, so that the water loss in the water lifting tank (2) is avoided, and the water lifting work is completed.
CN201811469586.0A 2018-11-28 2018-11-28 Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering Active CN109356782B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811469586.0A CN109356782B (en) 2018-11-28 2018-11-28 Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811469586.0A CN109356782B (en) 2018-11-28 2018-11-28 Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering

Publications (2)

Publication Number Publication Date
CN109356782A CN109356782A (en) 2019-02-19
CN109356782B true CN109356782B (en) 2024-02-13

Family

ID=65330908

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811469586.0A Active CN109356782B (en) 2018-11-28 2018-11-28 Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering

Country Status (1)

Country Link
CN (1) CN109356782B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113514039A (en) * 2021-04-28 2021-10-19 李福印 Water depth detection device for municipal engineering

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3116920U (en) * 2005-09-22 2005-12-22 童瑞祺 Hydraulic buoyancy kinetic energy device
CN206988016U (en) * 2017-07-03 2018-02-09 张海 A kind of water conservancy and hydropower buoyancy picotan
CN108678897A (en) * 2018-07-25 2018-10-19 福建金砖知识产权服务有限公司 A kind of water conservancy and hydropower buoyancy picotan
CN108798973A (en) * 2018-06-26 2018-11-13 江苏二八建设有限公司 A kind of water conservancy and hydropower buoyancy picotan
CN209244721U (en) * 2018-11-28 2019-08-13 中国电建集团贵阳勘测设计研究院有限公司 Buoyancy water lifting device for hydraulic and hydroelectric engineering

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3116920U (en) * 2005-09-22 2005-12-22 童瑞祺 Hydraulic buoyancy kinetic energy device
CN206988016U (en) * 2017-07-03 2018-02-09 张海 A kind of water conservancy and hydropower buoyancy picotan
CN108798973A (en) * 2018-06-26 2018-11-13 江苏二八建设有限公司 A kind of water conservancy and hydropower buoyancy picotan
CN108678897A (en) * 2018-07-25 2018-10-19 福建金砖知识产权服务有限公司 A kind of water conservancy and hydropower buoyancy picotan
CN209244721U (en) * 2018-11-28 2019-08-13 中国电建集团贵阳勘测设计研究院有限公司 Buoyancy water lifting device for hydraulic and hydroelectric engineering

Also Published As

Publication number Publication date
CN109356782A (en) 2019-02-19

Similar Documents

Publication Publication Date Title
CN109356782B (en) Buoyancy water lifting device and buoyancy water lifting method for hydraulic and hydroelectric engineering
CN110552328B (en) Stoplog type gate with layered water taking function and working method thereof
CN108432602A (en) A kind of pumping irrigation equipment using waterpower
CN108413032A (en) A kind of tower pressure vessel and its working method
CN113680243A (en) Tire bead steel wire chemical plating solution stirring device
CN207722489U (en) A kind of knockout drum automatic draining device
CN209244721U (en) Buoyancy water lifting device for hydraulic and hydroelectric engineering
CN201706055U (en) Automatic water control valve and water tank using automatic water control valve
CN206501765U (en) It is a kind of to be used for the hydraulic power drainage system of emergent water drainage car
CN107801669B (en) Cage lifting control platform, lifting control system of floatable cage and lifting control method
CN205842199U (en) A kind of compressed air floating ball hydrophobic water valve
CN201412573Y (en) Automatic control valve for liquid level
CN106799985A (en) A kind of hydraulic power drainage system for water drainage car of meeting an urgent need
CN212640098U (en) Full-automatic gravity type dissolved oxygen fine filter
CN201262269Y (en) Equipment for automatic water supply
CN206769952U (en) Mine-used I. S methane gas extraction pipeline automatic water drainage device
CN108360450B (en) Novel high-automation water conservancy safety and environment-friendly device
CN206804339U (en) A kind of lake heavy metal pollution sampling apparatus
CN215487946U (en) Gas-liquid separation check valve for gas pipeline
CN111395398A (en) Immersed tube structure suitable for high flow velocity and construction method thereof
CN2597772Y (en) Pressure-controlled water level automatic controller
CN205654900U (en) Overflow formula water level regulating valve
CN204961987U (en) A direct action type automatic water supply valve for solar water heater
CN219952490U (en) High-efficient roof rainwater internal discharge device that flows effectively
CN219974832U (en) Water pump exhaust device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant