CN106930246B - Unpowered automatic water filling and draining counterweight gate - Google Patents
Unpowered automatic water filling and draining counterweight gate Download PDFInfo
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- CN106930246B CN106930246B CN201710330028.5A CN201710330028A CN106930246B CN 106930246 B CN106930246 B CN 106930246B CN 201710330028 A CN201710330028 A CN 201710330028A CN 106930246 B CN106930246 B CN 106930246B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 165
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 230000000903 blocking effect Effects 0.000 claims abstract description 23
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 239000011229 interlayer Substances 0.000 claims abstract description 10
- 210000004907 gland Anatomy 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 20
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 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
- E02B7/26—Vertical-lift gates
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Barrages (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses an unpowered automatic water filling and draining counterweight gate, which comprises a steel gate body with a hollow interlayer, wherein a plurality of longitudinal and transverse supporting beam plates are uniformly arranged at intervals in the hollow interlayer of the steel gate body, the longitudinal and transverse supporting beam plates divide the hollow interlayer at the lower part of the steel gate body into a plurality of sealed water tanks, a water inlet pipe communicated with the upstream of a river channel is arranged on a water facing surface of the sealed water tank close to the bottom position, and a flashboard type water inlet/blocking device is arranged at the water inlet of the water inlet pipe; a longitudinal drain pipe communicated with the downstream of the river is arranged on the bottom wall of the sealed water tank, and a gland type drain device is arranged in the longitudinal drain pipe; the top wall of the sealed water tank is provided with an air inlet/exhaust pipe which extends out from the upper part of the back water surface and is communicated with the downstream of the river; the invention has the advantages of simple structure, convenient installation and use, low cost, simplified operation difficulty, energy conservation and wide application prospect, and greatly reduces the load of the starting and stopping machinery.
Description
Technical Field
The invention relates to a gate for hydraulic and hydroelectric engineering, in particular to an unpowered automatic water charging and discharging counterweight gate.
Background
The plane steel gate is used in water conservancy and hydropower engineering, and the existing plane steel gate cannot be closed by dead weight due to the existence of frictional resistance and floating force in the process of closing the gate by moving water, so that the gate can be closed only by adding a balance weight. In the traditional weighting mode, cast iron blocks, concrete blocks or iron sand concrete blocks and the like are mostly placed in the door body structure, and the design can not remove the counterweight in the lifting process of the gate and needs to be lifted together with the counterweight block, so that the capacity of the opening and closing machinery is greatly increased; the increase of the capacity of the opening and closing machinery leads to the increase of the requirement on the load of the opening and closing machinery, the installation process is more complex, and the installation difficulty is higher.
Disclosure of Invention
The invention aims to provide the unpowered automatic charging and discharging counterweight gate which can increase a counterweight when being closed, lighten the counterweight when being lifted and reduce the capacity of a starting and closing machine.
In order to achieve the purpose, the invention can adopt the following technical scheme:
the unpowered automatic water filling and draining counterweight gate comprises a steel gate body with a hollow interlayer, wherein a plurality of longitudinal supporting beam plates and transverse supporting beam plates are uniformly arranged in the hollow interlayer of the steel gate body at intervals, the hollow interlayer at the lower part of the steel gate body is divided into a plurality of sealed water tanks by the longitudinal supporting beam plates and the transverse supporting beam plates, a water inlet pipe communicated with the upstream of a river channel is arranged on a water-facing surface of the sealed water tank close to the bottom position, and a plugboard type water inlet/blocking device is arranged at a water inlet of the water inlet pipe; a longitudinal drain pipe communicated with the downstream of the river is arranged on the bottom wall of the sealed water tank, and a gland type drainage device is arranged in the longitudinal drain pipe; an air inlet/exhaust pipe which extends out from the upper part of the back water surface of the sealed water tank and is communicated with the downstream of the river is arranged on the top wall of the sealed water tank;
the inserting plate type water inlet/blocking device comprises an upper opening guide groove longitudinally arranged at the water inlet of the water inlet pipe, the upper part of the guide groove is of a wedge-shaped structure, and the water inlet of the water inlet pipe is flush and communicated with the inclined plane of the wedge-shaped structure at the upper part of the guide groove; a water blocking valve body matched with the wedge-shaped structure at the upper part of the guide groove is arranged in the guide groove in a sliding manner, the lower end of the water blocking valve body is vertically and fixedly connected with a first valve rod penetrating out of the bottom of the guide groove, a first guide support is arranged at the position, corresponding to the position of the first valve rod, of the water facing surface of the steel gate body, the first valve rod extends downwards through the first guide support, and the length of the penetrating section of the first valve rod is consistent with the stroke length of the water blocking valve body;
the gland type drainage device comprises a cylindrical valve body arranged in the longitudinal drainage pipe in a clearance sliding manner, the upper end of the cylindrical valve body is fixedly connected with a sealing cover, and the lower end of the cylindrical valve body is vertically and fixedly connected with a second valve rod; the sealing cover is buckled on a water inlet of the longitudinal drain pipe, a second guide support is arranged at the bottom of the back water surface of the steel gate body at the position corresponding to the second valve rod, the second valve rod extends downwards to pass through the second guide support, and the length of the penetrating section of the second valve rod is smaller than the stroke length of the cylindrical valve body.
And a rubber sealing gasket is arranged on the inclined plane of the water blocking valve body and the water inlet of the water inlet pipe.
And an annular rubber sealing ring is fixedly arranged at the edge of the water inlet of the longitudinal water drainage pipe, and the inner diameter of the annular rubber sealing ring is consistent with that of the longitudinal water drainage pipe.
The lower end of the first valve rod is horizontally provided with a first top pressure plate, and the lower end of the second valve rod is horizontally provided with a second top pressure plate.
The invention has the advantages of simple structure and convenient installation and use. When the steel gate body is completely closed, the water inlet pipe is in an open state, upstream water enters the sealed water tank from the water inlet pipe and becomes a part of the steel gate body to form a balance weight, so that the weight of the steel gate body is increased, the friction resistance and the floating force can be resisted when the steel gate body is closed, a cast iron block, a concrete block or an iron sand concrete block and the like do not need to be filled, and the construction process is simplified; after the steel gate body is completely closed, the longitudinal drain pipe is in an open state, and water in the sealed water tank is discharged from a gap between the longitudinal drain pipe and the cylindrical valve body, so that the gate is free of balance weight when opened, the load of the opening and closing machinery is greatly reduced, the capacity of the opening and closing machinery is reduced when lifted, and the installation difficulty of the opening and closing machinery is simplified; in addition, the addition or the removal of the balance weight in the sealed water tank is automatically completed in the opening and closing process of the gate, no additional power is needed, the manufacturing cost is low, the operation difficulty is simplified, the energy is saved, and the application prospect is very wide.
Drawings
FIG. 1 is a schematic view of the non-closed state of the counterweight gate of the present invention.
Fig. 2 is a schematic view of the structure of the counterweight gate in a fully closed state.
Detailed Description
As shown in figures 1 and 2, the unpowered automatic water charging and discharging counterweight gate comprises a steel gate body 1 with a hollow interlayer arranged in a gate groove between the upper and lower parts of a river channel, a plurality of longitudinal supporting beam plates and a plurality of transverse supporting beam plates are uniformly arranged in the hollow interlayer of the steel gate body 1 at intervals, the longitudinal supporting beam plates and the transverse supporting beam plates divide the hollow interlayer of the steel gate body 1 into a plurality of chambers, the chambers at the lower part of the steel gate body 1 are sealed to form a sealed water tank 2 (the volume of the sealed water tank 2 needs to be calculated according to gate arrangement and opening and closing force), a water inlet pipe 3 communicated with the upstream of the river channel is arranged on the upstream face of the sealed water tank 2 at the position close to the bottom of the sealed water tank 2 (the diameter of the water inlet pipe 3 needs to be calculated according to the descending speed of the steel gate body 1 and the required counterweight size), the axial direction of the water inlet pipe 3 is vertical to the upstream face of the sealed water tank 2, be provided with the longitudinal drain pipe 4 that is linked together with river course low reaches on sealed water tank 2 diapire (steel gate body 1 bottom is from the upstream face to the surface of a river tilt up, and longitudinal drain pipe 4 is worn out from inclined plane upper portion, guarantee that longitudinal drain pipe 4 is linked together with river course low reaches all the time), be provided with on sealed water tank 2 roof from its surface of a river top extend wear out and with river course low reaches intake/blast pipe 5 that is linked together, intake/blast pipe 5 is the exhaust when sealed water tank 2 is intake, admit air during the drainage, in addition when sealed water tank 2 is full of, intake/blast pipe 5 can also play the effect of the unnecessary water of discharge.
A water inlet of the water inlet pipe 3 is provided with a plugboard type water inlet/blocking device capable of realizing water storage and water storage of the sealed water tank 2, the plugboard type water inlet/blocking device comprises an upper opening guide groove 6 longitudinally arranged at the water inlet of the water inlet pipe 3, the upper part of the guide groove 6 is of a wedge-shaped structure, and the water inlet of the water inlet pipe 3 is flush with and communicated with the inclined plane of the wedge-shaped structure at the upper part of the guide groove 6; a water blocking valve body 7 matched with the wedge-shaped structure on the upper part of the guide groove is arranged in the guide groove 6 in an up-and-down sliding manner, when the water blocking valve body 7 moves to the upper part of the guide groove 6, the inclined surface of the water blocking valve body 7 is attached to the inclined surface of the wedge-shaped structure on the upper part of the guide groove 6 (the inclined surface attachment is better in water blocking effect compared with the vertical surface attachment, and in addition, the wedge-shaped structure can enable the water blocking valve body 7 to compress the water inlet of the water inlet pipe 3 when moving upwards); in order to further prevent water leakage, a rubber sealing gasket 14 is arranged on the inclined plane of the water blocking valve body 7, which is attached to the water inlet of the water inlet pipe 3, so that the water blocking effect is greatly improved. The lower end of the water-blocking valve body 7 is vertically and fixedly connected with a first valve rod 8 penetrating out from the bottom of the guide groove 6, the bottom of the upstream face of the steel gate body 1 at the position corresponding to the first valve rod 8 is provided with a first guide support 9, the first valve rod 8 downwards extends through the first guide support 9, the first guide support 9 can guide the up-and-down movement of the first valve rod 8, and meanwhile, the first valve rod 8 is prevented from inclining in the movement process; the length of the first valve rod 8 penetrating through the first guide support 9 downwards is consistent with the stroke length of the water blocking valve body 7, namely when the water blocking valve body 7 moves to the uppermost end of the guide groove 6, the lower end of the first valve rod 8 is flush with the bottom surface of the steel gate body 1; for making first valve rod 8 up-and-down motion more steady, be provided with first roof pressure board 16 at the lower extreme level of first valve rod 8, increase first valve rod 8 and river course bottom plate 101's contact surface makes river course bottom plate 101 roof pressure more firm when first valve rod 8.
A gland type drainage device capable of realizing water storage and drainage of the sealed water tank 2 is arranged in the longitudinal drainage pipe 4, the gland type drainage device comprises a cylindrical valve body 10 arranged in the longitudinal drainage pipe 4 in a clearance sliding mode (the size of a clearance between the longitudinal drainage pipe 4 and the cylindrical valve body 10 is determined according to drainage time, namely the diameter difference value of the longitudinal drainage pipe 4 and the cylindrical valve body 10), the upper end of the cylindrical valve body 10 is fixedly connected with a sealing cover 11, and the lower end of the cylindrical valve body 10 is vertically and fixedly connected with a second valve rod 12; the sealing cover 11 is buckled on the water inlet of the longitudinal water discharge pipe 4 to seal a gap between the longitudinal water discharge pipe 4 and the cylindrical valve body 10 so as to prevent water leakage; in addition, in order to further prevent water leakage, an annular rubber sealing ring 15 is fixedly arranged at the edge of the water inlet of the longitudinal water drainage pipe 4, the inner diameter of the annular rubber sealing ring 15 is consistent with that of the longitudinal water drainage pipe 4, and at the moment, the sealing cover 11 is buckled and pressed on the annular rubber sealing ring 15, so that the water blocking effect is better. A second guide support 13 is arranged at the bottom of the back water surface of the steel gate body 1 corresponding to the position of the second valve rod 12, the second valve rod 12 extends downwards through the second guide support 13, and the second guide support 13 has the same function as the first guide support 9, can guide the up-and-down movement of the second valve rod 12 and simultaneously prevents the second valve rod 12 from tilting in the movement process; the length of the second valve rod 12 penetrating out of the second guide support 13 is smaller than the stroke length of the cylindrical valve body 10, so that the cylindrical valve body 10 is not separated from the longitudinal drain pipe 4 when the steel gate body 1 is completely closed (namely, the lower end of the second valve rod 12 is pressed by the river channel bottom plate 101 to be flush with the bottom surface of the steel gate body 1); in order to make the up-and-down movement of second valve rod 12 more stable, second top pressure plate 17 is horizontally arranged at the lower end of second valve rod 12, so that the contact surface between second valve rod 12 and river channel bottom plate 101 is increased, and river channel bottom plate 101 is more stable when top pressure is applied to second valve rod 12.
The action process of the unpowered automatic water charging and discharging counterweight gate is as follows:
the steel shutter body 1 is in the fully open position (shown in fig. 1): upstream water in the river channel flows into the downstream of the river channel from the lower part of the steel gate body 1, meanwhile, under the action of the self gravity of the water stop valve body 7 and the first valve rod 8, the water stop valve body 7 is positioned at the lowest position in the guide groove 6, at the moment, the water inlet pipe 3 is in an open state, and the upstream water in the river channel flows into the sealed water tank 2 from the water inlet pipe 3 to be collected and stored; when the sealed water tank 2 is full of water, the redundant water can flow into the downstream of the river channel through the air inlet/outlet pipe 5, the sealed water tank 2 full of water reaches the balance weight required when the steel gate body 1 is closed, the steel gate body 1 can resist the frictional resistance and the floating force when being closed, the cast iron blocks, the concrete blocks or the iron sand concrete blocks and the like do not need to be refilled, and the construction process is simplified.
The steel shutter body 1 is in the fully closed position (shown in fig. 2): the steel gate body 1 completely falls on the river channel bottom plate 101, at the moment, the water blocking valve body 7 moves to the uppermost position in the guide groove 6 under the action of jacking the first valve rod 8 on the river channel bottom plate 101 to tightly press and seal the water inlet pipe 3, the water inlet pipe 3 is in a closed state, and water at the upstream of a river channel cannot enter the sealed water tank 2 any more; meanwhile, the cylindrical valve body 10 moves upwards under the action of jacking the second valve rod 12 by the riverway bottom plate 101 and jacks up the sealing cover 11, so that water in the sealed water tank 2 can slowly flow into the downstream of the riverway through a gap between the longitudinal water drainage pipe 4 and the cylindrical valve body 10; because the interval time between closing and reopening of steel gate body 1 is longer, therefore the water in sealed water tank 2 has already flowed before steel gate body 1 reopening, has not had the counter weight when reopening steel gate body 1, has alleviateed the load of opening and close machinery greatly, reduces and opens and close the mechanical capacity when promoting steel gate body 1.
The steel shutter body 1 is in the process of moving downward (i.e. before the steel shutter body 1 is completely closed): in the process, the steel gate body 1 is not completely closed and the sealing cover 11 is already pushed open, the water inlet pipe 3 is not in a completely closed state in the period, and the water inflow of the water inlet pipe 3 is greater than the water discharge of the gap in the longitudinal water discharge pipe 4; therefore, the process can be ignored, namely, the inside of the sealed water tank 2 is always in a full water state, the counterweight of the steel gate body 1 cannot be changed, and the opening and closing of the steel gate body 1 by a mechanical device are not influenced.
The steel gate body 1 is in the process of moving upwards (i.e. the steel gate body 1 does not reach the fully open station): in the process, because the water-blocking valve body 7 is made of engineering plastic alloy material with light weight, the water-blocking valve body 7 is tightly pressed at the inlet of the water inlet pipe 3 under the action of buoyancy and water pressure, and the water inlet of the sealed water tank 2 is prevented; therefore, the water inflow of the sealing water tank 2 in the process is very small and can be ignored, namely the counterweight of the steel gate body 1 cannot be increased greatly until the steel gate body reaches the fully-opened station, and the steel gate body 1 is not influenced to be opened by opening and closing machinery.
Steel gate body 1 is at whole in-process of opening and close, and sealed water tank 2's the water and the drainage process need not just can be accomplished automatically with the help of extra power, and installation and operation are all very simple, and greatly reduced opens and close mechanical capacity when promoting steel gate body 1, reduces the cost, and the energy saving, application prospect is very extensive.
Claims (4)
1. The utility model provides an unpowered automatic fill, drainage counter weight gate, is including steel gate body (1) that has the cavity intermediate layer even interval arrangement has a plurality of vertical support beam slab and horizontal support beam slab in the cavity intermediate layer of steel gate body (1), its characterized in that: the longitudinal supporting beam plate and the transverse supporting beam plate divide a hollow interlayer at the lower part of the steel gate body (1) into a plurality of sealed water tanks (2), a water inlet pipe (3) communicated with the upstream of a river channel is arranged on a water facing surface of the sealed water tanks (2) at a position close to the bottom, and a plugboard type water inlet/blocking device is arranged at a water inlet of the water inlet pipe (3); a longitudinal drain pipe (4) communicated with the downstream of the river is arranged on the bottom wall of the sealed water tank (2), and a gland type drainage device is arranged in the longitudinal drain pipe (4); an air inlet/outlet pipe (5) which extends out from the upper part of the back water surface of the sealed water tank (2) and is communicated with the downstream of the river is arranged on the top wall of the sealed water tank;
the inserting plate type water inlet/blocking device comprises an upper opening guide groove (6) which is longitudinally arranged at a water inlet of the water inlet pipe (3), the upper part of the guide groove (6) is of a wedge-shaped structure, and the water inlet of the water inlet pipe (3) is flush with and communicated with the inclined plane of the wedge-shaped structure at the upper part of the guide groove (6); a water-blocking valve body (7) matched with a wedge-shaped structure on the upper part of the guide groove (6) is arranged in the guide groove in a sliding mode, a first valve rod (8) penetrating out of the bottom of the guide groove (6) is fixedly connected to the lower end of the water-blocking valve body (7) in a vertical mode, a first guide support (9) is arranged at the position, corresponding to the position of the first valve rod (8), of the water-facing surface of the steel gate body (1), the first valve rod (8) extends downwards to penetrate through the first guide support (9), and the penetrating length of the penetrating length is consistent with the stroke length of the water-blocking valve body (7);
the gland type drainage device comprises a cylindrical valve body (10) arranged in the longitudinal drainage pipe (4) in a clearance sliding mode, the upper end of the cylindrical valve body (10) is fixedly connected with a sealing cover (11), and the lower end of the cylindrical valve body is vertically and fixedly connected with a second valve rod (12); the sealing cover (11) is buckled on a water inlet of the longitudinal drain pipe (4), a second guide support (13) is arranged at the bottom of the back water surface of the steel gate body (1) at the position corresponding to the second valve rod (12), the second valve rod (12) extends downwards to penetrate through the second guide support (13), and the length of the penetrating section of the second valve rod is smaller than the stroke length of the cylindrical valve body (10).
2. The unpowered automatic water charging and discharging counterweight gate according to claim 1, wherein: a rubber sealing gasket (14) is arranged on the inclined plane of the water blocking valve body (7) and the water inlet of the water inlet pipe (3) which are jointed mutually.
3. The unpowered automatic water charging and discharging counterweight gate according to claim 1, wherein: the water inlet of the longitudinal drain pipe (4) is fixedly provided with an annular rubber sealing ring (15) along the position, and the inner diameter of the annular rubber sealing ring (15) is consistent with that of the longitudinal drain pipe (4).
4. The unpowered automatic water charging and discharging counterweight gate according to claim 1, wherein: the lower end of the first valve rod (8) is horizontally provided with a first top pressure plate (16), and the lower end of the second valve rod (12) is horizontally provided with a second top pressure plate (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710330028.5A CN106930246B (en) | 2017-05-11 | 2017-05-11 | Unpowered automatic water filling and draining counterweight gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710330028.5A CN106930246B (en) | 2017-05-11 | 2017-05-11 | Unpowered automatic water filling and draining counterweight gate |
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| Publication Number | Publication Date |
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| CN106930246A CN106930246A (en) | 2017-07-07 |
| CN106930246B true CN106930246B (en) | 2022-07-22 |
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| CN201710330028.5A Active CN106930246B (en) | 2017-05-11 | 2017-05-11 | Unpowered automatic water filling and draining counterweight gate |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108891803B (en) * | 2018-07-26 | 2024-09-24 | 中冶北方（大连）工程技术有限公司 | Aggregate discharge bin and method of operating the same |
| CN111236177B (en) * | 2020-01-22 | 2021-06-22 | 浙江九州治水科技股份有限公司 | Gate buoyancy system with weighted water bag assistance function and buoyancy method thereof |
| CN111255855A (en) * | 2020-03-16 | 2020-06-09 | 杜会祥 | Counterweight device for airship |
| CN117684517B (en) * | 2023-11-14 | 2024-09-27 | 甘肃省水利水电勘测设计研究院有限责任公司 | Portable hoist driven low-energy-consumption gate |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000120047A (en) * | 1998-10-13 | 2000-04-25 | Chubu Electric Power Co Inc | Floating gate type water intake device |
| WO2010088731A1 (en) * | 2009-02-05 | 2010-08-12 | Rubicon Research Pty Ltd | Undershot sluice gate |
| WO2010101377A2 (en) * | 2009-03-02 | 2010-09-10 | Han Sangkwan | Environmentally-friendly engineering method for purifying polluted river water using the force of gravity, and powerless water gate operating system for same |
| CN204112291U (en) * | 2014-05-30 | 2015-01-21 | 上海市水利工程设计研究院有限公司 | Merogenesis floating box type tide-block sluice |
| CN104213570B (en) * | 2014-07-17 | 2016-08-10 | 北京翔鲲水务建设有限公司 | Close the construction method in cofferdam under water |
| CN106320284B (en) * | 2016-09-12 | 2018-05-01 | 合肥工业大学 | Double door leaf hydraulic gates that a kind of gravity opens and closes |
| CN206736867U (en) * | 2017-05-11 | 2017-12-12 | 黄河勘测规划设计有限公司 | It is unpowered fill automatically, draining counterweight gate |
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2017
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Address after: 450003 No. 109 Jinshui Road, Henan, Zhengzhou Applicant after: YELLOW RIVER ENGINEERING CONSULTING Co.,Ltd. Address before: 450003 No. 109 Jinshui Road, Henan, Zhengzhou Applicant before: YELLOW RIVER ENGINEERING CONSULTING Co.,Ltd. |
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