CN109235376A - A kind of flat filling valve using reservoir pressure expansion sealing - Google Patents
A kind of flat filling valve using reservoir pressure expansion sealing Download PDFInfo
- Publication number
- CN109235376A CN109235376A CN201811311840.4A CN201811311840A CN109235376A CN 109235376 A CN109235376 A CN 109235376A CN 201811311840 A CN201811311840 A CN 201811311840A CN 109235376 A CN109235376 A CN 109235376A
- Authority
- CN
- China
- Prior art keywords
- water seal
- annular
- outlet pipe
- plate
- valve plate
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/54—Sealings for gates
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The present invention discloses a kind of flat filling valve using reservoir pressure expansion sealing, it is mounted in gate top beam lattice, including water inlet pipe, water seal seat board, annular water seal, valve plate, guided bearing sliding block and outlet pipe, water seal seat board is welded on into water pipe end, annular water seal is bolted on water seal seat board via step annular outer plate and annular clip plate, and annular water seal top end face is close to valve plate；Circular hole corresponding with outlet pipe nozzle is offered on valve plate, water inlet pipe and the concentric setting of outlet pipe, the diameter of outlet pipe and the Circularhole diameter of valve plate are identical, and four guided bearing sliding blocks in rectangle are installed on outlet pipe, and guided bearing sliding block is bolted in slider bearing；The hanging axis moved in the affixed pull rod in valve plate top and kidney slot in gate hanging ear plate couples, and bottom end connects clump weight by lifting rope.The present invention can adapt to different reservoir levels and igfet gate condition, and not by influence to sediment, sealing is reliable.
Description
Technical field
The present invention relates to hydraulic and hydroelectric engineering technical field, more particularly, to a kind of using reservoir pressure expansion sealing
Flat filling valve.
Background technique
Emergency gate and bulkhead gate in China's hydroelectric project are generally hydrostatic and open door, and opening needs in front of the door to water-filling behind the door
Concora crush.Currently, the mode for the gate water-filling concora crush applied at home is mainly include the following types: set water-filling on bypass valve type, door
Valve, small guide vane propose the patterns such as door, gate internode water-filling, and various concora crush modes have the characteristics that its different and applicable elements.
1, by-passing valve water-filling: by-passing valve is set in dam body or in the gate pier of intake gate, and the library water before gate passes through bypass
Valve is flow to behind gate, and water flow is controlled by pipeline gate valve, generally sets twice valve in valve chamber, before for maintenance gate valve, behind be work
Make gate valve, operating platform is set in corridor in dam or gate pier top surface.This concora crush mode, which has, simplifies log type gate leaf, and straight
The characteristics of diameter selection is not limited by log type gate leaf, but there is also cost height, operation inconvenient maintenance, overhaul gate valve and gate valve front tube
Seriously corrode the disadvantages of being difficult to overhaul security risk brought by replacement in road.2, small guide vane mentions a water-filling: this water-filling mode is applicable in
It is smaller in orifice diameter, the lesser gate of head, and when arrangement filling valve difficulty, but this water-filling mode cannot reduce and open
The small guide vane overcurrent closing machine capacity, and having can make gate generate vibration, and gap jet stream also will cause the cavitation corrosion of hydraulic structure
Destroy etc., therefore general less use.3, gate internode water-filling: this water-filling mode is often to utilize shape at the merogenesis up and down of gate
Pore-forming is made a slip of the tongue stream, and the water-filling section of this mode is big, can shorten the filling time, and structure is simple, operate it is easy to maintenance, no
Filling valve need to be set；Due to only putting on section door when water-filling, so the increase of headstock gear capacity is less, do not increase headstock gear lift yet, but
This water-filling mode is applied on low water head gate more.4, filling valve water-filling is set on door: the structure type of this water-filling mode is more,
When gate sealing is preceding sealing, wicket is opened on gate or sets filling valve, this structure is more complex；Sealing after gate is
When, then charging pipe and valve body (or valve deck) are set on door；The operation of filling valve should link with gate hoist, charging pipe it is straight
Diameter should be according to filled water amount and filling time etc. because usually determining.This water-filling mode because operation maintenance it is more convenient, so using compared with
Extensively.
There are commonly gland-types, plunger-type structure for filling valve, under the conditions of low water head and clear water, mainly using traditional
Gland-type or plunger type filling valve carry out the water-filling concora crush of gate.Gland-type is generally used for downstream backwater gate, and traditional gland
Formula filling valve only sets one of ring-shaped rubber or rectangle p-type water seal, if door top will lead to filling valve there are silt or other foreign matters
It is not closed completely close and drainage occurs, the more aobvious protrusion especially in high pressure gate, head is higher, and water leakage is bigger；In addition,
Filling valve will lead to valve body and the friction of only collar be serious axially using collar limit is stopped, and steel to steel coefficient of friction is very big, has
When will lead to filling valve and can not close, influence the operation of gate water blocking and there are security risk, so state of the art is not enough
It is perfect.In high water head, Gao Hansha and multi-state service condition, there are silt siltings, spool card resistance, valve for traditional filling valve
The problems such as body corrosion, filling valve leak and maintenance difficulty.
Summary of the invention
It can cause spool card resistance can not normal work because silt, dirt and aquatic organism influence to solve traditional filling valve
The problem of making, the object of the present invention is to provide one kind can adapt to different reservoir levels and igfet gate condition, not by silt shadow
It rings, sealing is reliable, repair and maintenance amount is small, the economical and practical flat filling valve using reservoir pressure expansion sealing.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of flat filling valve using reservoir pressure expansion sealing, is mounted in gate top beam lattice, including water inlet
Pipe, water seal seat board, annular water seal, valve plate, guided bearing sliding block and outlet pipe, water inlet pipe cross section are circle, the weldering of water seal seat board
It connects in water inlet pipe end, annular water seal is bolted on water seal seat via step annular outer plate and annular clip plate
On plate；Annular water seal be shape in a ring, the step-like rubbery sealed body that cross section is " mountain " character form structure, in annular water seal
Between be provided with circular trough, circular trough vertical cross section is rectangle, and circular trough face height is high 1/3 in annular water seal end face, annular water
End face of binding is close to valve plate；Valve plate is rectangle, offers circular hole corresponding with outlet pipe nozzle on valve plate, water inlet pipe with
The concentric setting of outlet pipe, the diameter of outlet pipe and the Circularhole diameter of valve plate are identical, and four leading in rectangle are installed on outlet pipe
To bearing sliding block, guided bearing sliding block is located at outlet pipe upper and lower two-by-two, is arranged symmetrically, and guided bearing sliding block is solid by bolt
On fixed slider support；Valve plate top is connected with pull rod, and the hanging axis moved in pull rod and kidney slot in gate hanging ear plate couples, lock
Board bottom end connects clump weight by lifting rope.
The flat filling valve using reservoir pressure expansion sealing, annular water seal end face is above outside
4~5mm of step annular external pressure plate end face.
The flat filling valve using reservoir pressure expansion sealing, annular water seal top end face and guided bearing
The distance between shoe surface is slightly less than valve plate thickness.
The flat filling valve using reservoir pressure expansion sealing, guided bearing sliding block are bolted
It is mounted on outlet pipe.
The flat filling valve using reservoir pressure expansion sealing, flashboard are stainless steel material, guided bearing
Sliding block is oily nylon material.
Due to the adoption of the technical scheme as described above, the present invention has the following advantages:
This utilizes the flat filling valve of reservoir pressure expansion sealing, and structure is simple, and it is rationally novel to design, operation letter
Just, easily fabricated and installation, securely and reliably, using the gravity of gate movable pulley hoisting capacity and hanging axis by pull rod, by active force
It is transmitted to the promotion and closing for realizing valve plate on valve plate, to prevent silt and sundries card resistance, is coupled in valve plate bottom end by lifting rope
Clump weight, even if the shoal materials in charging pipe, valve plate also smoothly can be promoted and be closed, and do not influenced, do not deposited by silt and dirt
The valve plate or spool card resistance the problem of.
This utilizes the flat filling valve of reservoir pressure expansion sealing, utilizes reservoir hydraulic expansion sealing, water-stagnating effect
Reliably, the annular water seal of valve plate front and the water seal seat board of gate are fixed together, and annular water seal is outer using step annular
Pressing plate, inside annular clip plate withstand annular water seal, it is ensured that the integral strength of annular water seal, annular water seal sealing end face
Flatness and sealing reliability；Valve plate trailing flank is provided with 4 oily nylon guided bearing sliding blocks, existing guiding and supporting role,
It is adjustable the gap between valve plate and annular water seal sealing end face again, guarantees that annular water seal has the decrement of 2~3mm, this is to protect
It is reliably crucial to demonstrate,prove sealing.
This utilizes the flat filling valve of reservoir pressure expansion sealing, and filling valve operation service wear is small, repair and maintenance
Measure small, when filling valve is closed, concora crush before and after gate, is hydrostatic condition, the abrasion very little of valve plate and annular water seal；Filling valve
Early period is opened, valve plate need to overcome effect of the library water pressure to annular water seal, certain mill can be generated between annular water seal and valve plate
Damage, but silt and dirt are difficult to enter in attrition surface, and the friction time is shorter, and abrasion loss is limited；" mountain " font section structure
Rubber annular water seal rear portion has the annular clip plate of step annular outer plate, inside to protect, the chance very little of damage, in this way
The later maintenance of filling valve is greatly reduced, there is good application value.
Detailed description of the invention
Fig. 1 is to be shown with the present invention using the front view structure of the gate of the flat filling valve of reservoir pressure expansion sealing
It is intended to；
Fig. 2 is the B-B direction schematic cross-sectional view in Fig. 1；
Fig. 3 is A-A in Fig. 1 to schematic cross-sectional view；
Fig. 4 is the partial enlargement structural representation cutd open with D-D in Fig. 2；
Fig. 5 is D-D in Fig. 4 to schematic cross-sectional view；
Fig. 6 is the structural schematic diagram of the annular water seal in Fig. 4；
Fig. 7 is the side structure schematic view of Fig. 6；
Fig. 8 is the structural schematic diagram of the guided bearing sliding block in Fig. 5；
Fig. 9 is the side structure schematic view of Fig. 8；
Figure 10 is the overlooking structure diagram of Fig. 8；
In figure: 1- shackle plate；2- hanging axis；3- master slider；4- pull rod；5- annular outer plate；6- annular internal pressure
Plate；7- outlet pipe；8- guided bearing sliding block；9- valve plate；10- lifting rope；11- clump weight；12- water inlet pipe；13- is logical
Hole；14- circular trough；15- circular hole；16- annular water seal；17- water seal seat board；18- water stop rubber；The side 19- guiding；
The anti-sliding block of 20-；21- pressing plate；22- bolt；23- shear-pin.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in Fig. 1~10, this utilizes the flat filling valve of reservoir pressure expansion sealing, is mounted on gate top beam
In lattice, including water inlet pipe 12, water seal seat board 17, annular water seal 16, valve plate 9 and outlet pipe 7, water inlet pipe cross section are circle, water
Envelope seat board 17 is welded on 12 end of water inlet pipe, and annular water seal 15 passes through via step annular outer plate 5 and annular clip plate 6
Bolt is fixed on water seal seat board 17, and annular water seal, step annular outer plate and the concentric arrangement of annular clip plate, is increased
Add the intensity of annular water seal, the significantly deformation and abrasion of mitigation valve plate annular water seal during being promoted and being declined, extends annular water
The service life of envelope；Annular water seal end face has mechanical position limitation above the step annular external pressure 4~5mm of plate end face in outside
Function；It is described annular water seal be shape in a ring, cross section be " mountain " character form structure step-like rubbery sealed body, annular water
Envelope is intermediate to be provided with circular trough 14, and circular trough vertical cross section is rectangle, and the height of circular trough end face is high 1/ in annular water seal end face
3, intensity and the elasticity to guarantee annular water seal are best, and circular trough is via the through-hole 13 and library water phase opened up on water seal seat board 17
It is logical, in library under the action of water pressure, the water-stopping end surface expansion of mountain font annular water seal and press valve plate sealing, annular water seal 16
Top end face is close to valve plate 9, and there are 2~3mm pre compressed magnitudes, realize the reliable sealing of annular water seal；The valve plate is square
Shape offers circular hole 15 corresponding with the nozzle of outlet pipe 7, water inlet pipe and the concentric setting of outlet pipe, outlet pipe on valve plate
Diameter it is identical as the Circularhole diameter of valve plate, installed on outlet pipe four be in rectangle guided bearing sliding block 8, guided bearing is sliding
Block is located at outlet pipe upper and lower two-by-two, is arranged symmetrically, and guided bearing sliding block is bolted in slider bearing, using leading
Guiding, bearing and adjustment sealing gap are realized to bearing sliding block；9 top of valve plate is connected with pull rod 4, pull rod and gate lifting eye
The hanging axis 2 moved in 1 kidney slot of plate couples, and flashboard bottom end connects clump weight 11 by lifting rope 10, and clump weight can increase pass valve
Driving force can overcome sediment siltation to cause valve plate card resistance, fall risk not in place.
As shown in Fig. 2, water inlet pipe 12, water seal seat board 17, annular water seal 16, step annular outer plate 5, annular internal pressure
Plate 6, outlet pipe 7 and guided bearing sliding block 8 are fixed in gate beam lattice by welding or being bolted, 12 He of water inlet pipe
On same straight line, filling valve does not change the position of above-mentioned component when working at the center of outlet pipe 7.When under hanging axis 2
When being down to the kidney slot lower end of shackle plate 1, decline valve plate 9 by pull rod 4, until the center of the circular hole 15 on valve plate and water inlet
The center alignment of pipe 12, outlet pipe 7, filling valve standard-sized sheet.On the contrary, when hanging axis 2 is promoted to the kidney slot upper end of shackle plate 1, valve
The sealing end face for the annular water seal 16 installed on the end face of the non-aperture in 9 lower part of plate and water inlet pipe 12 forms precompressed sealing, water-filling
Valve closes entirely.
The distance between above-mentioned 16 top end face of annular water seal and 8 surface of guided bearing sliding block are slightly less than 9 thickness of valve plate,
To guarantee there is certain precompressed amount between annular water seal and valve plate, water shutoff effect was played in annular water seal when both can guarantee valve plate lifting
Fruit, and can guarantee that water seal does not damage when valve plate lifting rubs；After ponding emptying after gate, passed through using library water pressure logical
Hole 13 enters the circular trough 14 in annular water seal 16, and the sealing surface expansion of annular water seal is made further to compress valve plate sealing.
Above-mentioned guided bearing sliding block 8 is fixedly mounted on outlet pipe 7 by bolt 22, guided bearing sliding block top surface two
Side is equipped with pressing plate 21, and end is equipped with shear-pin 24.
Above-mentioned flashboard is erosion resistant stainless steel material, and guided bearing sliding block is oily nylon material.
Flat filling valve of the invention, valve plate 9, step annular outer plate 5, annular clip plate 6 and is bolted
The critical components such as part all use stainless steel material, and after running a period of time, the water-stopping end facing up of annular water seal is balanced
Afterwards, abrasion can be smaller and smaller between annular water seal and valve plate, to reach the non-maintaining or maintenance workload very little of filling device
Good operating condition.
The filling valve cross-section of river and annular water seal can be designed to circle, can also design it is rectangular, filling valve promoted and
Falling head should calculate required water according to the gate filling time with the hanging axis on gate in the run length code matching of shackle plate kidney slot
Basal area.When the cross-section of river is square hole, square hole width can also be adjusted, to realize the needs of different filling times.
The foregoing is merely presently preferred embodiments of the present invention, rather than limitation of the present invention, is not departing from essence of the invention
In the case where mind and range, equivalent changes and modifications made according to the patent scope of the present invention should all belong to of the invention special
Within sharp protection scope.
Claims (5)
1. a kind of flat filling valve using reservoir pressure expansion sealing, it is characterized in that: it is mounted in gate top beam lattice, packet
Water inlet pipe, water seal seat board, annular water seal, valve plate, guided bearing sliding block and outlet pipe are included, water inlet pipe cross section is circle, water seal
Seat board is welded on into water pipe end, and annular water seal is bolted on water via step annular outer plate and annular clip plate
It seals on seat board；Annular water seal be shape in a ring, cross section be " mountain " character form structure step-like rubbery sealed body, annular water seal
Centre is provided with circular trough, and circular trough vertical cross section is rectangle, and circular trough face height is high 1/3 in annular water seal end face, annular
Water seal top end face is close to valve plate；Valve plate is rectangle, offers circular hole corresponding with outlet pipe nozzle on valve plate, water inlet pipe with
The concentric setting of outlet pipe, the diameter of outlet pipe and the Circularhole diameter of valve plate are identical, and four leading in rectangle are installed on outlet pipe
To bearing sliding block, guided bearing sliding block is located at outlet pipe upper and lower two-by-two, is arranged symmetrically, and guided bearing sliding block is solid by bolt
On fixed slider support；Valve plate top is connected with pull rod, and the hanging axis moved in pull rod and kidney slot in gate hanging ear plate couples, flashboard
Bottom end connects clump weight by lifting rope.
2. the flat filling valve according to claim 1 using reservoir pressure expansion sealing, it is characterized in that: its annular water
Step annular external pressure plate end face 4~5mm of the sealing end face above outside.
3. the flat filling valve according to claim 1 using reservoir pressure expansion sealing, it is characterized in that: its annular water
Bind the distance between end face and guided bearing shoe surface is slightly less than valve plate thickness.
4. the flat filling valve according to claim 1 using reservoir pressure expansion sealing, it is characterized in that: its guiding branch
Sliding block is held to be mounted by means of bolts on outlet pipe.
5. the flat filling valve according to claim 1 using reservoir pressure expansion sealing, it is characterized in that: its flashboard is
Stainless steel material, guided bearing sliding block are oily nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311840.4A CN109235376B (en) | 2018-11-06 | 2018-11-06 | Flat plate type water filling valve for water stopping by reservoir pressure expansion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311840.4A CN109235376B (en) | 2018-11-06 | 2018-11-06 | Flat plate type water filling valve for water stopping by reservoir pressure expansion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109235376A true CN109235376A (en) | 2019-01-18 |
| CN109235376B CN109235376B (en) | 2023-06-30 |
Family
ID=65077054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811311840.4A Active CN109235376B (en) | 2018-11-06 | 2018-11-06 | Flat plate type water filling valve for water stopping by reservoir pressure expansion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109235376B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725285A (en) * | 2019-11-18 | 2020-01-24 | 内蒙古自治区水利水电勘测设计院 | Stoplog gate with automatic water filling device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201627184U (en) * | 2010-02-24 | 2010-11-10 | 中国水电顾问集团华东勘测设计研究院 | Auto-pressure regulating water-stopping sealing structure for gate |
| CN105220659A (en) * | 2015-08-21 | 2016-01-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Ultra-deep water retaining and emptying system for high dam and large reservoir and operation method thereof |
| CN206352281U (en) * | 2016-12-28 | 2017-07-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Improved structure of extra-high water head plane sliding gate |
| CN209099318U (en) * | 2018-11-06 | 2019-07-12 | 黄河水利水电开发总公司 | A kind of flat filling valve of silting blocking of library compression swelling sealing |
-
2018
- 2018-11-06 CN CN201811311840.4A patent/CN109235376B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201627184U (en) * | 2010-02-24 | 2010-11-10 | 中国水电顾问集团华东勘测设计研究院 | Auto-pressure regulating water-stopping sealing structure for gate |
| CN105220659A (en) * | 2015-08-21 | 2016-01-06 | 中国电建集团贵阳勘测设计研究院有限公司 | Ultra-deep water retaining and emptying system for high dam and large reservoir and operation method thereof |
| CN206352281U (en) * | 2016-12-28 | 2017-07-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Improved structure of extra-high water head plane sliding gate |
| CN209099318U (en) * | 2018-11-06 | 2019-07-12 | 黄河水利水电开发总公司 | A kind of flat filling valve of silting blocking of library compression swelling sealing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725285A (en) * | 2019-11-18 | 2020-01-24 | 内蒙古自治区水利水电勘测设计院 | Stoplog gate with automatic water filling device |
| CN110725285B (en) * | 2019-11-18 | 2024-06-11 | 内蒙古自治区水利水电勘测设计院 | Stoplog gate with automatic water filling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109235376B (en) | 2023-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109235376A (en) | A kind of flat filling valve using reservoir pressure expansion sealing | |
| CN209099318U (en) | A kind of flat filling valve of silting blocking of library compression swelling sealing | |
| CN209114430U (en) | A kind of gear-driven silting blocking postposition flap valve filling valve | |
| CN209144756U (en) | A kind of silting blocking arc door filling valve of machinery pressure compact form | |
| CN106930246B (en) | Unpowered automatic water filling and draining counterweight gate | |
| CN209099319U (en) | A kind of silting blocking boxlike flap valve filling valve of pulley drive | |
| CN210484631U (en) | Angle type lifting check valve | |
| CN109235375B (en) | Four-way running arc gate water filling valve | |
| CN218090745U (en) | Gate water filling valve for tail water accident maintenance of through-flow unit factory building | |
| CN109235378A (en) | It is a kind of to utilize gear-driven rear-mounted flap valve filling valve | |
| CN216275516U (en) | Novel protective facility for dam back slope | |
| CN110966441B (en) | Submerged relief valve based on water conservancy relief | |
| CN108468840B (en) | Micro-resistance slow-closing underwater bottom valve | |
| CN205089589U (en) | Fluid end assembly of plunger pump | |
| CN109235377B (en) | Mechanical compression type flap valve water filling valve driven by fixed pulley | |
| CN211039817U (en) | Check valve for hydraulic and civil engineering | |
| CN209469546U (en) | A kind of hydraulic pump and its waterpower pumping system | |
| KR200308734Y1 (en) | a half a month rotation floodgate | |
| CN111677895A (en) | Multi-bypass pressure relief type gate valve of high-pressure forge welding structure for nuclear power | |
| CN213114538U (en) | Novel maintenance gate water filling valve | |
| CN212129071U (en) | Submerged relief valve body | |
| CN219035668U (en) | Check valve | |
| JPH0219355B2 (en) | ||
| CN218813540U (en) | Hydraulic opening and closing gate | |
| CN217781932U (en) | Sluice with water conservancy diversion function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information |
Address after: 450000 No. 68 Zijingshan Road, Guancheng Hui District, Zhengzhou City, Henan Province Applicant after: YELLOW RIVER WATER RESOURCES AND HYDROPOWER DEVELOPMENT Corp. Address before: 450000 No. 68 Zijinshan Road, Guancheng Hui District, Zhengzhou City, Henan Province Applicant before: YELLOW RIVER WATER RESOURCES AND HYDROPOWER DEVELOPMENT Corp. |
|
| CB02 | Change of applicant information | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 709, 7 / F, 60 Shangding Road, Zhengdong New District, Zhengzhou City, Henan Province, 450000 Applicant after: Huanghe Water Resources and Hydropower Development Group Co.,Ltd. Address before: 450000 No. 68 Zijingshan Road, Guancheng Hui District, Zhengzhou City, Henan Province Applicant before: YELLOW RIVER WATER RESOURCES AND HYDROPOWER DEVELOPMENT Corp. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |