CN104120683A - Drainage hole blocking device and method - Google Patents
Drainage hole blocking device and method Download PDFInfo
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- CN104120683A CN104120683A CN201410360820.1A CN201410360820A CN104120683A CN 104120683 A CN104120683 A CN 104120683A CN 201410360820 A CN201410360820 A CN 201410360820A CN 104120683 A CN104120683 A CN 104120683A
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- water
- flap valve
- buoyancy aid
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Abstract
The invention provides a drainage hole blocking device and method. The drainage hole blocking device comprises a supporting device fixedly arranged on a cement-based pier at the upper end of a drainage hole, and a floating body flap valve movably connected with the supporting device. The floating body flap valve is composed of a sealing box and a connecting device fixedly arranged on the top of the sealing box. The top of a connecting rod device is provided with a U-shaped hinge, and a rotating shaft is transversely and fixedly inserted into the U-shaped hinge. The front end of the supporting device is provided with a long circular hole, and the upper end of the long circular hole is provided with an inclined opening communicated with the long circular hole. The floating body flap valve is movably connected with the supporting device in the mode that the rotating shaft on the floating body flap valve enters the long circular hole through the inclined opening and the inclined opening is welded in a sealing mode. The drainage hole blocking device is used for blocking the water inlet of a drainage channel needing to be repaired or blocked through water filling and hydraulic power action so that a dry land construction condition can be formed in the drainage channel; the problem that the hole of the drainage channel is blocked in flowing water is solved, the project amount is small, the construction period is short, the construction difficulty is low with the water conservancy condition utilized, and the blocking effect is good.
Description
Technical field
The present invention relates to spilled water hole plugging device and the method for blocking in sluice way import shutoff aperture in moving water in a kind of water power hydraulic engineering, this plugging device is arranged on sluice way import department, by water-filling and hydraulic action, close aperture, for construction at dry land condition is created in the reparation of sluice way in hole behind the door and gate slot.
Background technology
The spilled water hole of some water power hydraulic engineerings (road) is in operation and occurs accident, does not also have condition to transfer gate in former gate slot, and spilled water hole (road) sluices for a long time, to power station, causes very large loss, works the mischief also to the safety of engineering.Generally, adopt earth rock cofferdam or the scheme closed orifices of jettisoninging, engineering quantity is large, long in time limit, difficulty of construction is large, plugging effect is poor, expense is high.
Summary of the invention
For the problems referred to above, the invention provides and a kind ofly by water-filling and hydraulic action, close aperture, for the reparation of facility in hole is behind the door, spilled water hole plugging device and the method for blocking of construction at dry land condition are created in shutoff.
For achieving the above object, the present invention adopts following technological means, and a kind of spilled water hole plugging device, is characterized in that: comprise the bracing or strutting arrangement being fixedly located on the cement foundation pier of spilled water hole upper end, the buoyancy aid flap valve that bracing or strutting arrangement is flexibly connected;
The linkage that described buoyancy aid flap valve is fixed with by seal case and seal case top forms, and the top of described linkage is provided with U-shaped hinge, and described U-shaped hinge is laterally fixedly plugged with rotating shaft;
The front end of described bracing or strutting arrangement offers slotted hole, and the upper end of described slotted hole offers angle, and the angle of offering communicates with slotted hole;
Described buoyancy aid flap valve and bracing or strutting arrangement are by the rotating shaft on buoyancy aid flap valve, by angle, to be entered in slotted hole and angle is carried out to soldering and sealing to be actively coupled.
Described seal case is assembled by more piece gate flap, described seal case inside is provided with disconnected independent sealed water-filling cabin mutually, described water-filling cabin is connected with water-filling pipeline and discharge pipe line, between described water-filling pipeline and discharge pipe line and seal case, by welded seal, connects.
Described water-filling cabin is that described water-filling cabin is evenly arranged in seal case inside, and does not face mutually mutually between described water-filling cabin by the He Kong cabin, a plurality of water-fillings cabin that in seal case, the welding of more piece gate flap or Bolt Connection form.
Described water-filling pipeline and discharge pipe line quantity are corresponding with water-filling cabin, and described water-filling pipeline and discharge pipe line are to be welded or Bolt Connection forms by single seal for pipe joints.
The surrounding of the downstream face of described seal case is provided with ring-shaped rubber water seal, and described ring-shaped rubber water seal comprises hard rubber layer and soft rubber layer, and described hard rubber layer connects with the downstream face of casing.
Described linkage is the connecting rod being welded by shaped steel steel, and is at least 4, and uniform welding is at the top of box sealing, and is welded with reinforcing rib between described linkage.
Between described bracing or strutting arrangement upper surface and vertical end face, be provided with spigot surface.
The longitudinal angle of described angle and bracing or strutting arrangement is 45 °～55 °.
A spilled water hole method for blocking, comprises the following steps:
1), plugging device is installed; Bracing or strutting arrangement by with cement foundation pier in pre-buried built-in fitting weld or use bolt to be fixedly connected, buoyancy aid flap valve coordinates to form by rotating shaft and slotted hole with bracing or strutting arrangement and is flexibly connected;
2), spilled water hole shutoff; By buoyancy aid flap valve, spilled water hole is carried out to shutoff.
In described step 1), plugging device installation detailed process is as follows:
A: buoyancy aid flap valve carries out welding assembly on nonirrigated farmland or on the water surface, need to winch to buoyancy aid flap valve on the water surface by boom hoisting as completed on nonirrigated farmland, and rubber water sealing contacts with the water surface; Bracing or strutting arrangement is fixed on cement foundation pier simultaneously;
B: pull buoyancy aid flap valve, make rotating shaft on buoyancy aid flap valve and the angle contraposition on bracing or strutting arrangement; Putting down buoyancy aid flap valve makes rotating shaft enter into slotted hole from angle;
C: soldering and sealing; When rotating shaft enters into slotted hole completely, angle is carried out to soldering and sealing processing, angle is sealed completely.
Described step 2) in, spilled water hole shutoff is undertaken by following process:
I: open other spilled water hole of dam, dam water level is declined;
II: when dam water level declines, the gravity that water-filling increases buoyancy aid flap valve is carried out by water-filling pipeline in the water-filling cabin in buoyancy aid flap valve;
III: along with water level declines, buoyancy aid flap valve rotates around bracing or strutting arrangement jointed shaft under Action of Gravity Field, and when turning an angle, buoyancy aid flap valve can be subject to hydraulic action, and rotary closing completes the shutoff to spilled water hole automatically;
IV: after shutoff completes, water level goes up, and under the pressure of water, buoyancy aid flap valve completes permanent shutoff to spilled water hole.
The present invention adopts technique scheme, it has the following advantages: this spilled water hole plugging device, by water-filling and hydraulic action, be used for that shutoff will be repaired or the sluice way water inlet of shutoff, to form construction at dry land condition in sluice way, it provides the difficult problem in shutoff sluice way aperture under moving water condition, engineering quantity is little, duration is shorter, utilizes water conservancy condition difficulty of construction little, and plugging effect is good.
Accompanying drawing explanation
Fig. 1 is a kind of spilled water hole plugging device mounting structure schematic diagram.
Fig. 2 is that buoyancy aid flap valve is faced structural representation;
Fig. 3 is the right TV structure schematic diagram of buoyancy aid flap valve;
Fig. 4 be buoyancy aid flap valve casing face structural representation;
Fig. 5 is the right TV structure schematic diagram of the casing of buoyancy aid flap valve;
Fig. 6 is the structural representation of bracing or strutting arrangement.
1, cement foundation pier; 2, bracing or strutting arrangement; 3, buoyancy aid flap valve; 201, slotted hole; 202, angle; 203, spigot surface; 301, seal case; 302 linkages; 303, U-shaped hinge; 304, rotating shaft; 305, water-filling cabin; 306, water-filling pipeline; 307, discharge pipe line; 308, rubber water sealing; 309, reinforcing rib.
The specific embodiment
Below in conjunction with drawings and Examples, further the present invention is described in detail.
A kind of spilled water hole plugging device as shown in Fig. 1,2,3,4,5,6, comprises the bracing or strutting arrangement 2 being fixedly located on spilled water hole upper end cement foundation pier 1, the buoyancy aid flap valve 3 that bracing or strutting arrangement 2 is flexibly connected; The linkage 302 that buoyancy aid flap valve 3 is fixed with by seal case 301 and seal case 301 tops forms, seal case 301 is assembled by more piece gate flap, seal case 301 inside are provided with disconnected independent sealed water-filling cabin 305 mutually, water-filling cabin 305 is connected with water-filling pipeline 306 and discharge pipe line 307, between water-filling pipeline 306 and discharge pipe line 307 and seal case 301, by welded seal, connects; The top of linkage 302 is provided with U-shaped hinge 303, and U-shaped hinge 303 is laterally fixedly plugged with rotating shaft 304; The front end of bracing or strutting arrangement 2 offers slotted hole 201, and the upper end of slotted hole 201 offers angle 202, and angle 202 communicates with slotted hole 201; Bracing or strutting arrangement 2 is the steelframes that are welded by shaped steel, and buoyancy aid flap valve 3 is by the rotating shaft 304 on buoyancy aid flap valve 3, by angle 202, to be entered in slotted hole 201 and angle 201 is carried out to soldering and sealing to be actively coupled with bracing or strutting arrangement 2.This plugging device is by water-filling pipeline 306, to carry out water-filling by the water-filling cabin 305 in stuffing box 301 bodies when spilled water hole is carried out to shutoff, increase the gravity of buoyancy aid flap valve 3, change the attitude of buoyancy aid flap valve 3, when water level declines, buoyancy aid flap valve 3 by self gravity and the Action of Gravity Field in water-filling cabin 305 under produce rotation, under hydraulic action, close, spilled water hole is carried out to shutoff, when buoyancy aid flap valve 3 is installed with bracing or strutting arrangement 2, rotating shaft 304 on buoyancy aid flap valve 3 on linkage 302 enters into slotted hole 201 by angle 202, rotating shaft 304 enters into after slotted hole 201, angle 202 is carried out to soldering and sealing processing.
In the above-described embodiment, cement foundation pier 1 is embedded with built-in fitting, and bracing or strutting arrangement 2 is by being fixedly connected with built-in fitting welding or Bolt Connection and cement foundation pier 1.
Preferred version in the above-described embodiment, water-filling cabin 305 is a plurality of water-fillings cabins 305 that formed by the interior more piece gate flap of seal case 301 weld connection, water-filling cabin 305 is evenly arranged in seal case 301 inside, between water-filling cabin 305, do not face mutually mutually, water-filling pipeline 306 and discharge pipe line 307 quantity are corresponding with water-filling cabin 305 simultaneously, water-filling pipeline 306 and discharge pipe line 307 are to be formed by single seal for pipe joints weld connection, and more than 305, water-filling cabin is also evenly distributed and do not face mutually mutually.
Preferred version in the above-described embodiment, the surrounding of the downstream face of seal case 301 is provided with ring-shaped rubber water seal 308 as shown in Figure 3, ring-shaped rubber water seal 308 comprises hard rubber layer and soft rubber layer, hard rubber layer connects with the downstream face of casing, rubber water sealing 308 is not only done sealing but also decide supporting, soft rubber layer mainly adapts to the water shutoff of concrete surface, and hard rubber layer is mainly to bear and transmit water pressure, and has good water sealing effect.
Preferred version in the above-described embodiment, linkage 302 is the connecting rods that are welded by shaped steel steel, and it is at least 4, uniform welding is at the top of seal case 301, between linkage 302, be welded with reinforcing rib 09, reinforcing rib 309 adopts the steel truss that material is channel-section steel, it is mainly for linkage 302 and bracing or strutting arrangement 2, to bear the load of all directions after hinged that linkage 302 is at least 4, improve the safety connecting, between linkage 302, be welded with reinforcing rib, rigidity between reinforced engagement means 302, reinforcing rib adopts steel truss, described steel truss is channel-section steel, in process for transportation on the water, also having certain buoyancy and seal case 301 can form unified stressed.
Preferred version in the above-described embodiment, between bracing or strutting arrangement 2 upper surfaces and vertical end face, be provided with spigot surface 203, the spigot surface 203 being provided with can directly be pulled to rotating shaft 304 and 202 pairs of bit positions of angle buoyancy aid flap valve 3 by spigot surface 203, saved buoyancy aid flap valve 3 has been lifted to action, reduced difficulty of construction.
Preferred version in the above-described embodiment, the longitudinal angle of angle and bracing or strutting arrangement is 45 °～55, preferably angle is 50 °, the angle that the longitudinal angle of angle 202 and bracing or strutting arrangement 2 adopts the present embodiment to provide is optimum angle, when the angle that is greater than the present embodiment and provides, when carrying out enclosuring structure soldering and sealing, angle 202 need to carry out a large amount of soldering and sealing, waste resource, when angle is less than the angle that the present embodiment provides, rotating shaft is not easy to put into angle 202, in rotating shaft, enter after angle 202 simultaneously, because of angle less, the ratio of slope is larger, rotating shaft is larger to the impact of bracing or strutting arrangement 2, for installing, bring security risk.
The present embodiment also provides a kind of spilled water hole method for blocking simultaneously, by following steps, is undertaken:
1), plugging device is installed; As shown in Figure 1, bracing or strutting arrangement 2 is by welding or use bolt to be fixedly connected with the interior pre-buried built-in fitting of cement foundation pier 1, and buoyancy aid flap valve 3 is coordinated and is flexibly connected with slotted hole 201 by rotating shaft 304 with bracing or strutting arrangement 2;
2), spilled water hole shutoff; By 3 pairs of spilled water holes of buoyancy aid flap valve, carry out shutoff.
Above-mentioned steps 1) in, plugging device installation detailed process is as follows:
A: buoyancy aid flap valve 3 carries out welding assembly on nonirrigated farmland or on the water surface, need to winch to buoyancy aid flap valve 3 on the water surface by boom hoisting as completed on nonirrigated farmland, and rubber water sealing 309 contacts with the water surface; Bracing or strutting arrangement 2 is fixed on cement foundation pier 1 simultaneously;
B: pull buoyancy aid flap valve 3, be rotating shaft on buoyancy aid flap valve 3 304 with bracing or strutting arrangement 2 on angle contraposition; Putting down buoyancy aid flap valve 3 makes rotating shaft 304 enter into slotted hole 201 from angle 202;
C: soldering and sealing; When rotating shaft 304 enters into slotted hole 201 completely, angle 202 is carried out to soldering and sealing processing, angle 202 is sealed completely.
In above-mentioned steps 2) in, spilled water hole shutoff is that concrete shutoff is to be undertaken by following process:
I: open other spilled water hole of dam, dam water level is declined;
II: when dam water level declines, the gravity that water-filling increases buoyancy aid flap valve 3 is carried out by water-filling pipeline 308 in the water-filling cabin 305 in buoyancy aid flap valve 3;
III: along with water level declines, buoyancy aid flap valve 3 rotates around bracing or strutting arrangement 2 hinges under Action of Gravity Field, and when turning an angle, buoyancy aid flap valve 3 can be subject to the effect of waterpower, and rotary closing completes the shutoff to spilled water hole automatically;
IV: after shutoff completes, water level goes up, and under the pressure of water, 3 pairs of spilled water holes of buoyancy aid flap valve complete permanent shutoff.
In sum, the invention provides a kind of spilled water hole plugging device, by water-filling and hydraulic action, be used for that shutoff will be repaired or the sluice way water inlet of shutoff, to form construction at dry land condition in sluice way, it provides the difficult problem in shutoff sluice way aperture under moving water condition, engineering quantity is little, duration is shorter, utilizes water conservancy condition difficulty of construction little, and plugging effect is good.
The present invention only describes with above-described embodiment; the structure of each parts, setting position and connection thereof all can change to some extent; on the basis of technical solution of the present invention; all improvement of indivedual parts being carried out according to the principle of the invention and equivalents, all should not get rid of outside protection scope of the present invention.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (10)
1. a spilled water hole plugging device, is characterized in that: comprise the bracing or strutting arrangement being fixedly located on the cement foundation pier of spilled water hole upper end, the buoyancy aid flap valve that bracing or strutting arrangement is flexibly connected;
The linkage that described buoyancy aid flap valve is fixed with by seal case and seal case top forms, and the top of described linkage is provided with U-shaped hinge, and described U-shaped hinge is laterally fixedly plugged with rotating shaft;
The front end of described bracing or strutting arrangement offers slotted hole, and the upper end of described slotted hole offers angle, and the angle of offering communicates with slotted hole;
Described buoyancy aid flap valve and bracing or strutting arrangement are by the rotating shaft on buoyancy aid flap valve, by angle, to be entered in slotted hole and angle is carried out to soldering and sealing to be actively coupled.
2. according to claim, require a kind of spilled water hole plugging device described in 1, it is characterized in that: described seal case is assembled by more piece gate flap, described seal case inside is provided with disconnected independent sealed water-filling cabin mutually, described water-filling cabin is connected with water-filling pipeline and discharge pipe line, between described water-filling pipeline and discharge pipe line and seal case, by welded seal, connects.
3. a kind of spilled water hole plugging device according to claim 2, it is characterized in that: described He Kong cabin, water-filling cabin is the He Kong cabin, a plurality of water-fillings cabin by the welding of more piece gate flap or Bolt Connection form in seal case, described He Kong cabin, water-filling cabin is evenly arranged in seal case inside, and does not face mutually mutually between described water-filling cabin.
4. according to a kind of spilled water hole plugging device described in claim 2 or 3, it is characterized in that: described water-filling pipeline and discharge pipe line quantity are corresponding with water-filling cabin, and described water-filling pipeline and discharge pipe line are to be welded or Bolt Connection forms by single seal for pipe joints.
5. according to claim, require a kind of spilled water hole plugging device described in 1, it is characterized in that: the surrounding of the downstream face of described seal case is provided with ring-shaped rubber water seal, described ring-shaped rubber water seal comprises hard rubber layer and soft rubber layer, and described hard rubber layer connects with the downstream face of casing.
6. according to claim, require a kind of spilled water hole plugging device described in 1, it is characterized in that: described linkage is the connecting rod being welded by shaped steel steel, and be at least 4, uniform welding is at the top of seal case, and is welded with reinforcing rib between described linkage.
7. according to claim, require a kind of spilled water hole plugging device described in 1, it is characterized in that: between described bracing or strutting arrangement upper surface and vertical end face, be provided with spigot surface.
8. according to claim, require a kind of spilled water hole plugging device described in 1, it is characterized in that: the longitudinal angle of described angle and bracing or strutting arrangement is 45 °～55 °.
9. a spilled water hole method for blocking, is characterized in that: comprise the following steps:
1), plugging device is installed; Bracing or strutting arrangement by with cement foundation pier in pre-buried built-in fitting weld or use bolt to be fixedly connected, buoyancy aid flap valve coordinates to form by rotating shaft and slotted hole with bracing or strutting arrangement and is flexibly connected;
2), spilled water hole shutoff; By buoyancy aid flap valve, spilled water hole is carried out to shutoff.
10. a kind of spilled water hole method for blocking according to claim 9, is characterized in that: in described step 1), that detailed process is installed is as follows for plugging device:
A: buoyancy aid flap valve carries out welding assembly on nonirrigated farmland or on the water surface, need to winch to buoyancy aid flap valve on the water surface by boom hoisting as completed on nonirrigated farmland, and rubber water sealing contacts with the water surface; Bracing or strutting arrangement is fixed on cement foundation pier simultaneously;
B: pulling buoyancy aid flap valve, is rotating shaft on buoyancy aid flap valve and the angle contraposition on bracing or strutting arrangement; Putting down buoyancy aid flap valve makes rotating shaft enter into slotted hole from angle;
C: soldering and sealing; When rotating shaft enters into slotted hole completely, angle is carried out to soldering and sealing processing, angle is sealed completely;
Described step 2) in, spilled water hole shutoff is undertaken by following process:
I: open other spilled water hole of dam, dam water level is declined;
II: when dam water level declines, the gravity that water-filling increases buoyancy aid flap valve is carried out by water-filling pipeline in the water-filling cabin in buoyancy aid flap valve;
III: along with water level declines, buoyancy aid flap valve rotates around bracing or strutting arrangement jointed shaft under Action of Gravity Field, and when turning an angle, buoyancy aid flap valve can be subject to hydraulic action, and rotary closing completes the shutoff to spilled water hole automatically;
IV: after shutoff completes, water level goes up, and under the pressure of water, buoyancy aid flap valve completes permanent shutoff to spilled water hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410360820.1A CN104120683B (en) | 2014-07-28 | 2014-07-28 | A kind of spilled water hole plugging device and method for blocking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410360820.1A CN104120683B (en) | 2014-07-28 | 2014-07-28 | A kind of spilled water hole plugging device and method for blocking |
Publications (2)
| Publication Number | Publication Date |
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| CN104120683A true CN104120683A (en) | 2014-10-29 |
| CN104120683B CN104120683B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410360820.1A Active CN104120683B (en) | 2014-07-28 | 2014-07-28 | A kind of spilled water hole plugging device and method for blocking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719511A (en) * | 2020-06-24 | 2020-09-29 | 天津大学 | A kind of dam deep hole underwater dynamic water flap door closing device and method |
| CN111719512A (en) * | 2020-06-24 | 2020-09-29 | 天津大学 | A kind of dam deep hole underwater dynamic gate closing device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2668697Y (en) * | 2003-12-28 | 2005-01-05 | 国家电力公司西北勘测设计研究院 | Floating-body checking-repairing gate |
| CN2685394Y (en) * | 2004-01-12 | 2005-03-16 | 广州市科阳机电阀门有限公司 | Hydraulic floating gates |
| JP3178608U (en) * | 2012-07-11 | 2012-09-20 | 丸島産業株式会社 | Flap gate |
| CN202927154U (en) * | 2012-11-14 | 2013-05-08 | 安徽铜都阀门股份有限公司 | Flap valve |
| CN204039979U (en) * | 2014-07-28 | 2014-12-24 | 中国电建集团西北勘测设计研究院有限公司 | A kind of spilled water hole plugging device |
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2014
- 2014-07-28 CN CN201410360820.1A patent/CN104120683B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2668697Y (en) * | 2003-12-28 | 2005-01-05 | 国家电力公司西北勘测设计研究院 | Floating-body checking-repairing gate |
| CN2685394Y (en) * | 2004-01-12 | 2005-03-16 | 广州市科阳机电阀门有限公司 | Hydraulic floating gates |
| JP3178608U (en) * | 2012-07-11 | 2012-09-20 | 丸島産業株式会社 | Flap gate |
| CN202927154U (en) * | 2012-11-14 | 2013-05-08 | 安徽铜都阀门股份有限公司 | Flap valve |
| CN204039979U (en) * | 2014-07-28 | 2014-12-24 | 中国电建集团西北勘测设计研究院有限公司 | A kind of spilled water hole plugging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719511A (en) * | 2020-06-24 | 2020-09-29 | 天津大学 | A kind of dam deep hole underwater dynamic water flap door closing device and method |
| CN111719512A (en) * | 2020-06-24 | 2020-09-29 | 天津大学 | A kind of dam deep hole underwater dynamic gate closing device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104120683B (en) | 2016-04-20 |
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Inventor after: Bai Junguang Inventor after: Wang Haifeng Inventor after: Tan Daji Inventor after: Guo Fuquan Inventor after: Li Gang Inventor after: Ding Xiaoli Inventor after: Zhao Chunlong Inventor after: Liu Shaobin Inventor after: Wei Junyao Inventor after: Zhou Heng Inventor after: Yao Shuanxi Inventor after: Wang Mingjiang Inventor after: Yuan Lianjun Inventor after: Huang Tianrun Inventor after: Duan Hongjiang Inventor after: Fang Hanmei Inventor after: Zhu Zengbing Inventor after: Liao Yongping Inventor before: Bai Junguang Inventor before: Wang Haifeng Inventor before: Tan Daji Inventor before: Guo Fuquan Inventor before: Li Gang Inventor before: Ding Xiaoli Inventor before: Zhao Chunlong Inventor before: Liu Shaobin Inventor before: Yao Shuanxi Inventor before: Wang Mingjiang Inventor before: Yuan Lianjun Inventor before: Huang Tianrun Inventor before: Duan Hongjiang Inventor before: Fang Hanmei Inventor before: Zhu Zengbing Inventor before: Liao Yongping |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20141029 Assignee: NORTHWEST WATER CONSERVANCY & HYDROPOWER ENGINEERING Co.,Ltd. Assignor: POWERCHINA NORTHWEST ENGINEERING Corp.,Ltd. Contract record no.: X2021980002094 Denomination of invention: A device and method for plugging water outlet Granted publication date: 20160420 License type: Common License Record date: 20210325 |