CN104499464A - Hydraulic gate control valve capable of being automatically locked - Google Patents
Hydraulic gate control valve capable of being automatically locked Download PDFInfo
- Publication number
- CN104499464A CN104499464A CN201410730507.2A CN201410730507A CN104499464A CN 104499464 A CN104499464 A CN 104499464A CN 201410730507 A CN201410730507 A CN 201410730507A CN 104499464 A CN104499464 A CN 104499464A
- Authority
- CN
- China
- Prior art keywords
- drive
- gate sheet
- lock
- screw mandrel
- motor
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 4
- 210000000481 breast Anatomy 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- E02B7/26—Vertical-lift gates
- E02B7/36—Elevating mechanisms for vertical-lift gates
Abstract
The invention discloses a hydraulic gate control valve capable of being automatically locked. The hydraulic gate control valve comprises a controller, a motor drive circuit and a hydraulic gate control device, wherein the hydraulic gate control device comprises a gate plate (1) and a gate plate lifting drive device (21); the gate lifting drive device (21) comprises a casing (20) which is fixed on a supporting base body; an upper fixing rib (18), a middle fixing rib (19) and a bottom fixing plane are arranged on the inner part of the casing (20); a gate plate lifting drive motor (16) is supported on the upper fixing rib (18) and in power connection with the upper end of a gate plate lifting drive lead screw (17) which penetrates through the upper fixing rib (18), the middle fixing rib (19) and a through hole in the bottom fixing plane, and is in screw-thread fit with the screw in the gate plate (1).
Description
Technical field
The invention belongs to water conservancy gate field, especially a kind of water conservancy gate control system that can automatically lock.
Background technology
Water conservancy gate drives the lifting realizing gate sheet often through screw mandrel, and then the break-make realizing current controls.
In some cases .., gate often needs often to open, and now, gate sheet often normality is in raised position.This stability that is stressed and whole gate system for leading screw all has adverse effect.If the faults such as screw mandrel fracture occur occur, also easily cause the accidents such as gate sheet drops and occur.
And more existing lock-in techniques are often through artificial realization, its reliability and automaticity lower.And can not lock at any time.
Summary of the invention
The object of the present invention is to provide a kind of water conservancy gate control system that can automatically lock, its operational reliability is high, can improve the safety in operation of gate system.
According to the present invention, a kind of water conservancy gate control system that can automatically lock, comprise controller, motor-drive circuit and water conservancy gate control device, described water conservancy gate control device comprises gate sheet and gate sheet lifting drive, described gate sheet lifting drive comprises housing, described housing is fixed on support base, the inside of described housing has upper fixing rib, middle fixing rib and bottom stationary plane, fixed rib is supported with gate sheet lifting drive motors, described gate sheet lifting drive motors is elevated with gate sheet and drives the upper end power of screw mandrel to connect, described gate sheet lifting drives screw mandrel through fixed rib, through hole in middle fixing rib and bottom stationary plane, and described gate sheet lifting drives the screw threaded engagement in screw mandrel and described gate sheet, the top edge both sides of described gate sheet respectively have protrusion shoulder, the medial surface of two described protrusion shoulders all has open wide towards the middle part of described gate sheet, be elevated with described gate sheet the lock hole driving and the vertical direction of screw mandrel extends,
Drive the left side of screw mandrel in described gate sheet lifting, in described middle fixing rib, be supported with lock drive motor, described controller is elevated drive motors by motor-drive circuit with the gate sheet in described water conservancy gate control device and is connected with lock drive motor, thus the rotation of regulating gate plate lifting drive motors and lock drive motor, described lock drive motor connects with left lock drive leading screw power, in the below of described middle fixing rib, on described left lock drive leading screw, is installed with left sprocket wheel; Drive the right side of screw mandrel in described gate sheet lifting, in described middle fixing rib, right lock drive leading screw is also installed rotationally, in the below of described middle fixing rib, on described right lock drive leading screw, be installed with right sprocket wheel, left sprocket wheel is connected with right sprocket wheel power by driving-chain, described left sprocket wheel is identical with the sprocket root place circular diameter of right sprocket wheel and be elevated than described gate sheet and drive the diameter of screw mandrel large, the lifting of described gate sheet drive screw mandrel through driving-chain annular drive circuit
Described left lock drive leading screw and right lock drive leading screw are respectively used to drive and are positioned at gate sheet and are elevated the locking device driving the screw mandrel left and right sides, described gate sheet lifting drives the locking device of the screw mandrel left and right sides to be arranged symmetrically with and structure is identical, two described locking devices include ladder drive block and horizontal movement Lock Part, the middle part of described ladder drive block is provided with the internal thread hole that the threads of lead screw corresponding with right lock drive leading screw to described left lock drive leading screw coordinates, described ladder drive block is stepped profile at the lateral edges away from described gate sheet lifting driving screw mandrel of described internal thread hole, described stepped profile has top locking vertical plane, the inclined-plane, middle part tilted to the inside from described top locking vertical plane and bottom unlock vertical plane, described ladder drive block drives a lateral edges of screw mandrel to be vertical sliding part in the close described gate sheet lifting of described internal thread hole, the inner side end of described horizontal movement Lock Part drives the direction of screw mandrel to protrude towards described gate sheet lifting and is provided with outstanding ear, described outstanding ear is provided with roller, roller and described stepped profile Structure deformation, downside and the lower skateboard be fixed on described housing of described horizontal movement Lock Part are slidably matched, and upper side and the upper slide be fixed on described housing of described horizontal movement Lock Part are slidably matched,
In the bosom position of described housing, on the stationary plane of described bottom, be also fixed with track sleeves, described gate sheet lifting drives screw mandrel through the through hole of the longitudinal extension of described track sleeves, and the left and right side of described track sleeves is respectively arranged with for being elevated with the described gate sheet that is positioned at the track driving the vertical sliding part of the ladder drive block of the locking device of the screw mandrel left and right sides to be slidably matched.
According to another aspect, the using method of the described water conservancy gate control system that can automatically lock, first described controller controls described gate sheet lifting drive motors by motor-drive circuit and rotates, thus drive gate sheet lifting to drive screw mandrel to be promoted by described gate sheet, after described gate sheet is driven to raised position, it is out of service that described controller controls described gate sheet lifting drive motors by motor-drive circuit; Now described roller contacts with described unblock vertical plane; Then controller controls the operation of described lock drive motor by motor-drive circuit, drive ladder drive block descending, described horizontal movement Lock Part is horizontally outward run, the upper side of final described horizontal movement Lock Part contacts with the upper side of described lock hole, and top locking vertical plane and roller contact, then to control described lock drive motor by motor-drive circuit out of service for controller.
By such scheme, owing to realizing locking by lock drive motor, its automaticity is high, and by both sides locking device synchronous operation, can improve the locking stable degree of gate sheet.Arranged by the diameter of sprocket wheel and the magnitude relationship of elevating screw diameter, each component layouts compact and reasonable can be made, by the setting of outline side coordinated with roller, locking extending apparatus can swimmingly, be reliably made to stretch out smoothly, and utilize track sleeves, be integrally formed two track side surfaces, therefore, it is possible to make stretching out resistance and can cancelling out each other of the locking extending apparatus of both sides, reduce the perturbed force to housing unit, improve the safety of running.After locking, locking extending apparatus is jammed by upper lower skateboard, can reliably lock gate sheet.And lifting drive motors and lock drive motor arrange respectively and fix respectively, its operation is independent of each other, and improves the reliability of whole system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of valve system of the present invention when raised position does not still lock;
Fig. 2 is the enlarged drawing at the locking position of the valve system of Fig. 1;
Fig. 3 is the schematic diagram of valve system of the present invention when raised position still locks;
Fig. 4 is the enlarged drawing at the locking position of valve system in Fig. 3;
Fig. 5 is the overall structure schematic diagram of the water conservancy gate control system that the present invention can automatically lock.
Detailed description of the invention
According to Fig. 1-5, the present invention is described in detail.
A kind of water conservancy gate control system that can automatically lock, comprise controller, motor-drive circuit and water conservancy gate control device, described water conservancy gate control device comprises gate sheet 1 and gate sheet lifting drive 21, described gate sheet lifting drive 21 comprises housing 20, described housing 20 is fixed on support base, the inside of described housing 20 has upper fixing rib 18, middle fixing rib 19 and bottom stationary plane, fixed rib 18 is supported with gate sheet lifting drive motors 16, described gate sheet lifting drive motors 16 is elevated with gate sheet and drives the upper end power of screw mandrel 17 to connect, described gate sheet lifting drives screw mandrel 17 through fixed rib 18, through hole in middle fixing rib 19 and bottom stationary plane, and described gate sheet lifting drives screw mandrel 17 and the screw threaded engagement in described gate sheet 1, the top edge both sides of described gate sheet 1 respectively have protrude shoulder 2, two described protrusion shoulders 2 medial surface on all have open wide towards the middle part of described gate sheet 1, be elevated with described gate sheet the lock hole 3 driving and the vertical direction of screw mandrel 17 extends,
Drive the left side of screw mandrel 17 in described gate sheet lifting, in described middle fixing rib 19, be supported with lock drive motor 15, described controller is elevated drive motors 16 by motor-drive circuit with the gate sheet in described water conservancy gate control device and is connected with lock drive motor 15, thus the rotation of regulating gate plate lifting drive motors 16 and lock drive motor 15, described lock drive motor 15 connects with left lock drive leading screw power, in the below of described middle fixing rib 19, on described left lock drive leading screw, is installed with left sprocket wheel 10; Drive the right side of screw mandrel 17 in described gate sheet lifting, in described middle fixing rib 19, right lock drive leading screw is also installed rotationally, in the below of described middle fixing rib 19, on described right lock drive leading screw, be installed with right sprocket wheel 23, left sprocket wheel 10 is connected with right sprocket wheel 23 power by driving-chain 22, described left sprocket wheel 10 is identical with the sprocket root place circular diameter of right sprocket wheel 23 and be elevated than described gate sheet and drive the diameter of screw mandrel 17 large, the lifting of described gate sheet drive screw mandrel 17 through driving-chain 22 annular drive circuit
Described left lock drive leading screw and right lock drive leading screw are respectively used to drive and are positioned at gate sheet and are elevated the locking device driving screw mandrel 17 left and right sides, described gate sheet lifting drives the locking device of screw mandrel 17 left and right sides to be arranged symmetrically with and structure is identical, two described locking devices include ladder drive block 11 and horizontal movement Lock Part, the middle part of described ladder drive block 11 is provided with the internal thread hole that the threads of lead screw corresponding with right lock drive leading screw to described left lock drive leading screw coordinates, described ladder drive block 11 is stepped profile at the lateral edges away from described gate sheet lifting driving screw mandrel 17 of described internal thread hole, described stepped profile has top locking vertical plane 12, the inclined-plane, middle part tilted to the inside from described top locking vertical plane 12 and bottom unlock vertical plane 5, described ladder drive block 11 drives a lateral edges of screw mandrel 17 to be vertical sliding part 7 in the close described gate sheet lifting of described internal thread hole, the inner side end of described horizontal movement Lock Part drives the direction of screw mandrel 17 to protrude towards described gate sheet lifting and is provided with outstanding ear 26, described outstanding ear 26 is provided with roller 25, roller 25 and described stepped profile Structure deformation, downside and the lower skateboard 4 be fixed on described housing 20 of described horizontal movement Lock Part are slidably matched, and upper side and the upper slide 13 be fixed on described housing 20 of described horizontal movement Lock Part are slidably matched,
In the bosom position of described housing 20, on the stationary plane of described bottom, be also fixed with track sleeves 8, described gate sheet lifting drives screw mandrel 17 through the through hole of the longitudinal extension of described track sleeves, and the left and right side of described track sleeves 8 is respectively arranged with for being elevated with the described gate sheet that is positioned at the track driving the vertical sliding part 7 of the ladder drive block 11 of the locking device of screw mandrel 17 left and right sides to be slidably matched.
Wherein, described protrusion shoulder is provided with the sensed parts 29 for being coupled with the detection sensor 30 on described lower skateboard 4, for providing signal after described gate sheet 1 is driven to raised position.
Wherein, the track of the left and right side of described track sleeves 8 is provided with upper limit position block 9 and lower position block 6.
According to another aspect, the using method of the described water conservancy gate control system that can automatically lock, first described controller controls described gate sheet lifting drive motors 16 by motor-drive circuit and rotates, thus drive gate sheet lifting to drive screw mandrel 17 to be promoted by described gate sheet 1, after described gate sheet 1 is driven to raised position, it is out of service that described controller controls described gate sheet lifting drive motors 16 by motor-drive circuit; Now described roller 25 contacts with described unblock vertical plane 5; Then controller controls described lock drive motor 15 by motor-drive circuit and runs, drive ladder drive block 11 descending, described horizontal movement Lock Part is horizontally outward run, the upper side of final described horizontal movement Lock Part contacts with the upper side of described lock hole, and top locking vertical plane 12 contacts with roller 25, and then to control described lock drive motor 15 by motor-drive circuit out of service for controller.
Claims (4)
1. the water conservancy gate control system that can automatically lock, comprise controller, motor-drive circuit and water conservancy gate control device, described water conservancy gate control device comprises gate sheet (1) and gate sheet lifting drive (21), described gate sheet lifting drive (21) comprises housing (20), described housing (20) is fixed on support base, the inside of described housing (20) has upper fixing rib (18), middle fixing rib (19) and bottom stationary plane, fixed rib (18) is supported with gate sheet lifting drive motors (16), described gate sheet lifting drive motors (16) is elevated with gate sheet and drives the upper end power of screw mandrel (17) to connect, described gate sheet lifting drives screw mandrel (17) through fixed rib (18), through hole in middle fixing rib (19) and bottom stationary plane, and described gate sheet lifting drives screw mandrel (17) and the screw threaded engagement in described gate sheet (1), the top edge both sides of described gate sheet (1) respectively have protrusion shoulder (2), the medial surface of two described protrusion shoulders (2) all has towards the middle part of described gate sheet (1) open wide, be elevated with described gate sheet the lock hole 3 driving and the vertical direction of screw mandrel (17) extends,
The left side of screw mandrel (17) is driven in described gate sheet lifting, described middle fixing rib (19) is supported with lock drive motor (15), described controller is elevated drive motors (16) by motor-drive circuit and the gate sheet in described water conservancy gate control device and is connected with lock drive motor (15), thus the rotation of regulating gate plate lifting drive motors (16) and lock drive motor (15), described lock drive motor (15) connects with left lock drive leading screw power, in the below of described middle fixing rib (19), described left lock drive leading screw is installed with left sprocket wheel (10), the right side of screw mandrel (17) is driven in described gate sheet lifting, described middle fixing rib (19) is also provided with right lock drive leading screw rotationally, in the below of described middle fixing rib (19), described right lock drive leading screw is installed with right sprocket wheel (23), left sprocket wheel (10) is connected with right sprocket wheel (23) power by driving-chain (22), described left sprocket wheel (10) is identical with the sprocket root place circular diameter of right sprocket wheel (23) and be elevated than described gate sheet and drive the diameter of screw mandrel (17) large, the lifting of described gate sheet drive screw mandrel (17) through driving-chain (22) annular drive circuit,
Described left lock drive leading screw and right lock drive leading screw are respectively used to driving and are positioned at gate sheet and are elevated the locking device driving screw mandrel (17) left and right sides, described gate sheet lifting drives the locking device of screw mandrel (17) left and right sides to be arranged symmetrically with and structure is identical, two described locking devices include ladder drive block (11) and horizontal movement Lock Part, the middle part of described ladder drive block (11) is provided with the internal thread hole that the threads of lead screw corresponding with right lock drive leading screw to described left lock drive leading screw coordinates, described ladder drive block (11) is stepped profile at the lateral edges away from described gate sheet lifting driving screw mandrel (17) of described internal thread hole, described stepped profile has top locking vertical plane (12), the inclined-plane, middle part tilted to the inside from described top locking vertical plane (12) and bottom unlock vertical plane (5), described ladder drive block (11) drives a lateral edges of screw mandrel (17) to be vertical sliding part (7) in the close described gate sheet lifting of described internal thread hole, the inner side end of described horizontal movement Lock Part drives the direction of screw mandrel (17) to protrude towards described gate sheet lifting and is provided with outstanding ear (26), described outstanding ear (26) is provided with roller (25), roller (25) and described stepped profile Structure deformation, downside and the lower skateboard (4) be fixed on described housing (20) of described horizontal movement Lock Part are slidably matched, and upper side and the upper slide (13) be fixed on described housing (20) of described horizontal movement Lock Part are slidably matched,
In the bosom position of described housing (20), on the stationary plane of described bottom, be also fixed with track sleeves (8), described gate sheet lifting drives screw mandrel (17) through the through hole of the longitudinal extension of described track sleeves, and the left and right side of described track sleeves (8) is respectively arranged with for being elevated with the described gate sheet that is positioned at the track driving the vertical sliding part (7) of the ladder drive block (11) of the locking device of screw mandrel (17) left and right sides to be slidably matched.
2. a kind of water conservancy gate control system that can automatically lock as claimed in claim 1, wherein, described protrusion shoulder is provided with the sensed parts (29) for being coupled with the detection sensor (30) on described lower skateboard (4), for providing signal after described gate sheet (1) is driven to raised position.
3. a kind of water conservancy gate control system that can automatically lock as claimed in claim 1, wherein, the track of the left and right side of described track sleeves (8) is provided with upper limit position block (9) and lower position block (6).
4. the using method of a kind of water conservancy gate control system that can automatically lock as claimed in claim 1, first described controller controls described gate sheet lifting drive motors (16) by motor-drive circuit and rotates, thus drive gate sheet lifting to drive screw mandrel (17) to be promoted by described gate sheet (1), after described gate sheet (1) is driven to raised position, it is out of service that described controller controls described gate sheet lifting drive motors (16) by motor-drive circuit; Now described roller (25) contacts with described unblock vertical plane (5); Then controller controls the operation of described lock drive motor (15) by motor-drive circuit, drive ladder drive block (11) descending, described horizontal movement Lock Part is horizontally outward run, the upper side of final described horizontal movement Lock Part contacts with the upper side of described lock hole, and top locking vertical plane (12) contacts with roller (25), then to control described lock drive motor (15) by motor-drive circuit out of service for controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730507.2A CN104499464B (en) | 2014-12-05 | 2014-12-05 | A kind of water conservancy gate control system that can automatically lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410730507.2A CN104499464B (en) | 2014-12-05 | 2014-12-05 | A kind of water conservancy gate control system that can automatically lock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104499464A true CN104499464A (en) | 2015-04-08 |
| CN104499464B CN104499464B (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410730507.2A Expired - Fee Related CN104499464B (en) | 2014-12-05 | 2014-12-05 | A kind of water conservancy gate control system that can automatically lock |
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| CN104836064A (en) * | 2015-05-26 | 2015-08-12 | 浙江工商职业技术学院 | Dustproof circuit board plug assembly |
| CN104836069A (en) * | 2015-05-29 | 2015-08-12 | 陈文文 | Power supply interface device of power supply equipment with left and right limiting function |
| CN104868306A (en) * | 2015-05-29 | 2015-08-26 | 郑旭 | Power supply interface device of power supply equipment easy to slide |
| CN104868310A (en) * | 2015-05-29 | 2015-08-26 | 海盐县通元弗斯特工艺品厂 | Power supply interface device of power supply equipment driven by single motor |
| CN104868308A (en) * | 2015-05-29 | 2015-08-26 | 陈文文 | Power supply interface device of power supply equipment using fans for heat radiation |
| CN104868309A (en) * | 2015-05-29 | 2015-08-26 | 永嘉路路通进出口有限公司 | Power supply interface device of power supply equipment using contact sensor |
| CN104882723A (en) * | 2015-05-29 | 2015-09-02 | 浙江工商职业技术学院 | Power supply equipment interface apparatus transmitted by use of chain |
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| CN104916990A (en) * | 2015-05-29 | 2015-09-16 | 吴刚 | Power supply equipment power supply interface device |
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| CN104916987A (en) * | 2015-05-29 | 2015-09-16 | 陈文文 | Speed-adjustable power supply equipment power supply interface device |
| CN104953374A (en) * | 2015-05-29 | 2015-09-30 | 泉州市洛江区大明鞋厂 | Power supply unit interface unit positioned by positioning protrusion and lockable |
| CN104953390A (en) * | 2015-05-29 | 2015-09-30 | 汪涛 | Lockable power supply equipment interface device |
| CN104953365A (en) * | 2015-05-26 | 2015-09-30 | 方小刚 | Circuit board plug-in component with alarm |
| CN104953370A (en) * | 2015-05-29 | 2015-09-30 | 汪涛 | Power supply equipment interface device capable of achieving electrical connection automatically |
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| CN106087893A (en) * | 2016-06-15 | 2016-11-09 | 钱苏娟 | A kind of efficient water conservancy gate equipment and using method thereof |
| CN106087887A (en) * | 2016-06-15 | 2016-11-09 | 钱苏娟 | The water conservancy gate equipment of a kind of environmental protection and using method thereof |
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| CN108301386A (en) * | 2018-04-24 | 2018-07-20 | 李红星 | It is a kind of to realize immediately from the upper-turn-type dam sluice gate of locking control |
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| CN104953365A (en) * | 2015-05-26 | 2015-09-30 | 方小刚 | Circuit board plug-in component with alarm |
| CN104836064A (en) * | 2015-05-26 | 2015-08-12 | 浙江工商职业技术学院 | Dustproof circuit board plug assembly |
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| CN104953372A (en) * | 2015-05-29 | 2015-09-30 | 浙江工商职业技术学院 | Power supply equipment interface device with positioning protrusion |
| CN104953371A (en) * | 2015-05-29 | 2015-09-30 | 吴刚 | Power supply interface unit of roller-driven power supply unit |
| CN104953373A (en) * | 2015-05-29 | 2015-09-30 | 杭州涛度电子商务商行 | Rapidly-radiating power supply interface device of power supply equipment |
| CN105006689A (en) * | 2015-05-29 | 2015-10-28 | 浙江工商职业技术学院 | Stably-operating power supply equipment interface device |
| CN105908681A (en) * | 2016-04-20 | 2016-08-31 | 武汉长海高新技术有限公司 | Screw hoist |
| CN106087887A (en) * | 2016-06-15 | 2016-11-09 | 钱苏娟 | The water conservancy gate equipment of a kind of environmental protection and using method thereof |
| CN106087893A (en) * | 2016-06-15 | 2016-11-09 | 钱苏娟 | A kind of efficient water conservancy gate equipment and using method thereof |
| CN106192917A (en) * | 2016-08-12 | 2016-12-07 | 李常明 | A kind of lift water conservancy valve system of energy-conserving and environment-protective |
| CN106284226A (en) * | 2016-08-12 | 2017-01-04 | 李常明 | A kind of reliable and stable lift water conservancy gate structure |
| CN106592538A (en) * | 2017-02-05 | 2017-04-26 | 国家电网公司 | Gate structure for energy storage power station |
| CN106592538B (en) * | 2017-02-05 | 2018-09-25 | 国家电网公司 | A kind of gate structure for storage station |
| CN108301386A (en) * | 2018-04-24 | 2018-07-20 | 李红星 | It is a kind of to realize immediately from the upper-turn-type dam sluice gate of locking control |
| CN108301386B (en) * | 2018-04-24 | 2020-03-13 | 李红星 | Upturning dam gate capable of realizing instant self-locking control |
| CN109732485A (en) * | 2019-03-20 | 2019-05-10 | 盛瑞传动股份有限公司 | A kind of camshaft retaining groove grinder |
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| CN104499464B (en) | 2015-09-30 |
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