CN201459686U - Hydraulic up-turning type gate - Google Patents

Hydraulic up-turning type gate Download PDF

Info

Publication number
CN201459686U
CN201459686U CN2009200925651U CN200920092565U CN201459686U CN 201459686 U CN201459686 U CN 201459686U CN 2009200925651 U CN2009200925651 U CN 2009200925651U CN 200920092565 U CN200920092565 U CN 200920092565U CN 201459686 U CN201459686 U CN 201459686U
Authority
CN
China
Prior art keywords
type
gate
door
hydraulic
type doors
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.)
Expired - Lifetime
Application number
CN2009200925651U
Other languages
Chinese (zh)
Inventor
丁正中
陈丽晔
王春
陈霞
杨光
毛明令
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yellow River Engineering Consulting Co Ltd
Original Assignee
Yellow River Engineering Consulting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yellow River Engineering Consulting Co Ltd filed Critical Yellow River Engineering Consulting Co Ltd
Priority to CN2009200925651U priority Critical patent/CN201459686U/en
Application granted granted Critical
Publication of CN201459686U publication Critical patent/CN201459686U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Barrages (AREA)

Abstract

The utility model discloses a hydraulic up-turning type gate which comprises a gate, a hydraulic open-close machine, a hydraulic pump station and a control room, wherein the gate is formed by transversely arraying three or more unit gates, the unit gates with odd numbers are A type doors, and the unit gates with even numbers are B type doors; the A type doors, the B type doors and an upper cylinder hanging head of the hydraulic open-close machine are respectively hung on opposite side faces of two box type steel structure beams through hanging hinges, wherein the two box type steel structure beams are additionally arranged on the upstream and the downstream of an isolation belt between double amplitude bridges; the middle parts of each of the A type doors and the B type doors are respectively connected with a lower cylinder hanging head of the hydraulic open-close machine through branch hinges; side water stopping rubbers arranged at both sides of each B type door are pressed on door hinges of the A type doors adjacent to the B type doors; and water stopping rubbers arranged at the rear sides of the bottoms of the A type doors and the B type doors are pressed on the side face of a bottom threshold to form a side and bottom sealing structure. The gate can be constructed in a large span without obstructing landscapes, and the hydraulic up-turning type gate has simple process, easy and convenient mounting and lower cost.

Description

Hydraulic upward turnover type gate
Technical field
The utility model relates to a kind of large span shutter, especially relates to hydraulic upward turnover type gate.
Background technology
Large span shutter is different from the layout of conventional gate, is usually used in special environment, has special function, structure and effect.Press the rotation formula classification, this type of gate roughly can be divided into upward turnover type, following convertible and hoirzontally rotating.Below be several examples of having built engineering.
(1) lower shaft drives flap gate (following convertible)
This gate is applied to Suzhou River river mouth sluice, for convertible down.Gate is wide 100 meters, and is high 9.76 meters.Lower shaft drives the novel gate that flap gate is a function such as a kind of can the realization " two-way water blocking, gatage is adjustable ".This lock gate leaf adopts vertical cantilever beam structures, is directly driven by the rotation of hydraulic hoist operation lower shaft, because the width in gate aperture no longer is subjected to the restriction of deck-molding, is usually used in flood control, retaining tide, regulates water level and comprehensive water transfer.This gate can crouch at ordinary times under water, good concealment.
(2) goggle formula steel gate (upward turnover type)
This gate is positioned at the Qinhuaihe River, Nanjing training works three distributary river mouth locks, is upward turnover type.Lock is high 6.5 meters, the aperture is wide 44 meters, establish the movable paddle of 6 fans in addition, nearly 300 tons of single door gross weight in 74 meters of the arc length, gate.This type of gate is bearing on the basis, both sides, and span is bigger to the influence of structure, and the width in aperture also is subjected to certain restriction.Behind this gate opening, can form specific moulding.
(3) large span Segment gate (upward turnover type)
Breathe out Lingshui Spring road tide-block sluice, be upward turnover type.This lock is positioned at Dutch Ha Lingshuidao and blocks the extra large dam south, is made up of sluice gate and ship lock.Sluice gate is totally 17 holes, every hole span 58m, and the twice Segment gate is established in every hole, by an extra large side, is leaning on water channel one side together together.
(4) plane, two door leaf rotary (hoirzontally rotating)
The new water channel tide-block sluice of Rotterdam is positioned at the new water channel of Rotterdam, NED river mouth, is hoirzontally rotating.This lock is the last part that protection area, delta is not subjected to the extensive moistureproof engineering of North Sea storm tide attack; the gate accumbency is on the new water channel of wide 360m, dark 17m; form by two huge support arms, the high 22m of a fan respectively be housed on the support arm top, in establish the open web type Segment gate of ballast water tank water.Two support arms link to each other with the spherical coupling that is fixed on two of the two ends, river course each heavy 600t, and are the center rotation with it.When two support arms join the two sections of a bridge, etc in the middle of the river, the river course can be sealed, tide is blocked in beyond the gate.This lock lock body rests in the pool depressed place of two sides, river course at ordinary times, and along with the closure of its support arm, floating to move main stem in place with the lock body earlier in the time of need closing, and then in it ballast water tank water water-filling, it is sink on the gate ground sill that is built on the riverbed.When opening a sluice gate, earlier the water in the lock body is discharged, it is floated, then along with mobile again it being floated of its support arm retracted former stop position.
Above-mentioned prior art respectively has deficiency. and upset scheme under the hydraulic pressure: gate is arranged under water, hydraulic hoist is suspended on below the bridge, the fixedly hinge of gate winding bank at the bottom of water channel is rotated the requirement that realizes dash and sluicing. owing to be subjected to the restriction of this form gate width, every control sluice need be provided with 5 holes, aperture width is 18m, the centre is cut apart by gate pier, the about 7m. of gate height of lock is again owing to a door body is arranged under water, for the maintenance condition is provided, need access door to be set in upstream and downstream, and there is a silt dirt alluvial problem. conventional stop log gate: same, owing to be subjected to the restriction of this form gate width, every control sluice 6 holes, aperture width is 17m, the about 7m of gate overall height of lock, the centre has to cut apart with gate pier, the korneforos gate pier influences landscape effect, upstream and downstream also will be provided with Emergency Gate. upset scheme on the hydraulic pressure: and complex structure, invest bigger. conventional stop log gate: simple in structure, invest less, gate inspection platform and door machine track etc. only need be set, easy to maintenance, the silt dirt is difficult for alluvial, but gate pier need be set, door body shape is bigger, and landscape effect is poor; In addition, owing to adopt the door machine operation, there are shortcomings such as automaticity is low, the operations staff is many, the operating time is long.
The utility model content
For solving the problems of the technologies described above, the utility model is initiated a kind of large span hydraulic upward turnover type gate.
Hydraulic upward turnover type gate described in the utility model, comprise gate, hydraulic hoist, hydraulic power unit and control room, described gate is by 3 or 3 above unit gate transversely arranged compositions, described unit gate odd number is an A type door, even number is the Type B door, each described A, at least be provided with 2 vertical girders on the Type B door, the upper end of each described girder and with the oil cylinder upper hoisting head of the corresponding described hydraulic hoist of this girder quantity, be suspended on respectively and set up on the relative side of two box type steel structure beams of isolation strip upstream and downstream between the double width bridge each described A by hanging hinge, the middle part of the girder of Type B door is hung head and is linked to each other respectively with under the oil cylinder of each described hydraulic hoist by a hinge; In the lower end of each described A, Type B door, be provided with 2 hydraulic lock assemblies at least; The side water stop rubber of being located at each described Type B door both sides is pressed on the door leaf of the A type door that is adjacent, and constitutes side direction sealing hermetically-sealed construction each other; The end water rubber of being located at each described A, Type B door bottom rear side is pressed on the Di Kan side, constitutes the bottom hermetically-sealed construction; The left rear side of the leftmost A type of described gate door and the right lateral side of rightmost A type door are equipped with water stop rubber, and it cooperates the sealing hermetically-sealed construction that constitutes described gate both sides with abutment wall.
Adopt technique scheme, the lock bridge organically combines, and has avoided the repeated construction of lock and bridge, has saved urban space and investment; The unit gate laterally makes up, but large span is built lock, not restricted by span; By rubber sealing sealing each other, simple and reliable for structure, cost is low between side direction; Gate can stealthyly dexterously hang under the bridge at ordinary times, can't spy on gate dam at a distance, has reached the harmony of engineering, equipment and environment, and landscape effect is good.
Described A, Type B door preferably adopt the monolithic plane steel gate, and described side water stop rubber cross section is " Ω " type, and described end water rubber cross section is " two P dumbbells " type; With the Type B reveal water stop rubber place of pressing side sealing seat board can also be set at described A type door; Type B reveal limit and A, Type B door bottom also are provided with stopping means.
As further improvement of the utility model, described hydraulic power unit is two covers, and described hydraulic power unit and control room sunk type are arranged on the bank between the double width bridge; Described hydraulic hoist also comprises the stroke measuring device that adopts built-in magnetostrictive displacement sensor and inductance approach switch, adopts the sync control device of flow speed control valve in conjunction with solenoid operated directional valve bypass draining correction mode.
Because machining accuracy, frictional resistance, the load of each oil cylinder are inhomogeneous and the otherness of leakage rate, produce synchronism deviation when causing each oil cylinder operation.Selecting the maximum characteristics of magnetostrictive displacement sensor for use is split-type structural, and promptly the electronics storehouse utilizes an inside cable to be connected with measuring staff, not only can arrange for the oil cylinder upper hoisting head and save the space, and make things convenient for field adjustable and Maintenance and Repair.Accomplish both can guarantee the twin-tub synchronization accuracy, overcome the shortcoming of built-in sensor inconvenience debugging and maintenance again.This Synchronization Control scheme not only satisfies this engineering function needs, and simultaneously owing to adopt modularized design, each unit module equipment moves respectively, influences lessly, and the synchronous precision of same module twin-tub meets the demands, and equipment is simple and reliable, integrated cost is lower.Reduce far away, the inconvenient trouble of equipment management of distance between each lock simultaneously.Adopt inductance approach switch, be installed in the oil cylinder upper hoisting head, it is by producing eddy current effect in metal object, thereby causes the LC oscillating circuit to weaken.This variation is measured by the principle of the amplifying circuit of sensor induction, when the high-frequency ac electromagnetic field of sensor promptly sends signal, the control system shutdown with the induction rod that does not have wearing and tearing and non-contacting mode and detect on the free bearing.Two cover hydraulic power unit subregions drive, and make that it is technical, economy and the comprehensive optimum of ambient conditions.
The utility model also is provided with inspection platform below described hydraulic hoist, be used for the repair and maintenance of gate and headstock gear; Described hydraulic lock assembly is arranged on the center line lower end of described girder, comprise locked cylinder, underwater heat measurement mechanism, lock bearing pin and be arranged on the platform of locking under water on the end bank, in off position down, described lock shaft moves forward and backward with the described platform formation that locks under water and wears, takes off combination, be used for locking or decontrol described gate, under opening, described hydraulic lock assembly is connected with described inspection platform locking; Be provided with a cover high pressure towards the silt system at described end Kan Chu.
Hydraulic lock assembly is to guarantee that can this gate satisfy the two-way supporting requirement in bottom, realizes the essential condition of gate two-way water blocking and locking.Adopt manual locking not possess operating condition, it is not high again that conventional formula automatically locks reliability, and when problem takes place under water, be difficult for solution.Because domestic beyond example still can be for using for reference at present, the designer through constantly making great efforts to develop this hydraulic lock assembly, addresses this problem the problems referred to above according to the thinking principle and the method for innovative design well, has realized the function of two-way water blocking and locking.When gate was in the maintenance position, this device can make gate lock equally on inspection rack.Possess reverse dash supporting, the locking of closing the door, three functions of maintenance locking.High pressure is set towards the silt system at end Kan Chu, has solved locking and gate end water position foreign material silting problem under water.
The utility model hydraulic upward turnover type gate has changed large span shutter manufacturing process complexity in the hydraulic engineering in the past, difficulty has been installed, big this traditional concept of investment, and open domestic professional designer's the visual field provides new mentality of designing and experience.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further details.
Fig. 1 is the cross-sectional structure schematic diagram of the utility model hydraulic upward turnover type gate.
Fig. 2 is the plan structure schematic diagram of the utility model hydraulic upward turnover type gate.
Fig. 3 is the structural representation of annexation between the utility model part unit gate.
Fig. 4 is the plan structure schematic diagram of Fig. 3.
Fig. 5 is the local structure for amplifying schematic diagram of Fig. 4.
Fig. 6 is the structural representation of the utility model end water rubber.
The specific embodiment
Fig. 1 to Fig. 5 shows the utility model optimized technical scheme. as we can see from the figure, the latent isolation strip that is located between the double width bridge 8 of this large span hydraulic upward turnover type gate, mainly by gate, hydraulic hoist 6, hydraulic power unit and control room constitute, described gate is by 3 or 3 above unit gate transversely arranged compositions, described unit gate odd number is an A type door 14, even number is a Type B door 15, each described A, Type B door 14,15 is the monolithic plane steel gate, described Type B door 15 side direction and A, Type B door 14,15 bottoms are provided with stopping means, this bottom extreme position can limit the sealing decrement of unit gate, and when the locking of operation end bank, provide spacing, this side direction stopping means is arranged on the side bar of Type B door 15, its major function is the side direction mutual alignment of 15 at restriction A type door 14 and Type B door, because A type door 14 and Type B door 15 are overlapping at bottom sealing place, the position-limiting action of this side direction stopping means, the end water that can guarantee gatehouse keeps the state of overlap joint, forms leak paths in order to avoid throw off; Each described A, Type B door 14,15 are provided with 2 vertical girders, the upper end of each described girder and with the oil cylinder upper hoisting head of the corresponding described hydraulic hoist 6 of this girder quantity, be suspended on respectively and set up on the relative side of two box type steel structure beams 4 of isolation strip upstream and downstream between the double width bridge 8 by hanging hinge 5,7, described box type steel structure beam 4 is by girder steel buttress 3 supporting, and the middle part of the girder of each described A, Type B door 14,15 is hung head and linked to each other respectively with under the oil cylinder of each described hydraulic hoist 6 by a hinge 11; Center line lower end at the girder of each described A, Type B door 14,15, be provided with 2 hydraulic lock assemblies 12, this hydraulic lock assembly 12 comprises locked cylinder, underwater heat measurement mechanism, lock bearing pin and be arranged on the platform of locking under water 13 on the end bank 2, and the hydraulic power unit of described locked cylinder is installed on the box type steel structure beam 4;
In off position down, described lock shaft moves forward and backward under the driving of locked cylinder, wear, take off combination with described platform 13 formations that lock under water, be used for locking or decontrol described gate, under opening, inspection platform locking platform 10 lockings on described hydraulic lock assembly 12 and the inspection platform 9 that is arranged on hydraulic hoist 6 belows are connected; The cross section of being located at each described Type B door 15 both sides is that the side water stop rubber 16 of " Ω " type is pressed on the side sealing seat board of the A type door 14 that is adjacent, and constitutes side direction sealing hermetically-sealed construction each other; The cross section of being located at each described A, Type B door 14,15 bottom rear sides for " two P dumbbells " type end water rubber 17 is pressed on end bank 2 sides, constitutes the bottom hermetically-sealed construction; The left rear side of the leftmost A type of described gate door 14 and the right lateral side of rightmost A type door 14 are equipped with water stop rubber, and it cooperates the sealing hermetically-sealed construction that constitutes described gate both sides with abutment wall; Above-mentioned hydraulic power unit is two covers, and a cover hydraulic power unit is controlled the keying of each described A type door 14, and another set of hydraulic power unit is controlled the keying of each described Type B door 15; Described hydraulic power unit and control room sunk type are arranged on the bank between the double width bridge 8; Described hydraulic hoist 6 also comprises the stroke measuring device that adopts built-in magnetostrictive displacement sensor and inductance approach switch, adopts the sync control device of flow speed control valve in conjunction with solenoid operated directional valve bypass draining correction mode; Also be provided with a cover high pressure towards silt system 1 at described end Kan2Chu, this high pressure towards silt system 1 mainly by forming towards silt pump, control valve, high-pressure water pipe and nozzle, it is furnished with a high pressure jellyfish pipe at end bank 2 positions along gate end water direction, dash the position of becoming silted up at needs and be provided with one towards the pipe nozzle that becomes silted up, after the startup of silt system, by-pass valve control is opened, the alluvial foreign material at water under high pressure bump sealing face and locking position, and starting gate carries away foreign material by water body simultaneously.
Need operation in order during gate opening/closing.
It is as follows to open the door operation program:
1) opens Type B door 15 simultaneously: after at first starting hydraulic hoist 6 and promoting gates and compress end bank 2, start hydraulic lock assembly 12 and mention lock shaft; After lock shaft breaks away from end bank 2, hydraulic hoist 6 operation gate openings.
2) open A type door 14 simultaneously: operation is with 1).
3) gate opening is to the horizontal lock position, and hydraulic lock assembly 12 makes gate lock behind inspection platform locking platform 10, hydraulic hoist 6 unloadings.
Close the door operation program and to open a program opposite.
Terrain control should be opened any fan or several fans unit gate, in order to the usefulness of maintenance, but must follow above-mentioned gate opening/closing order, and when promptly opening A type door 14, the Type B door 15 of both sides must be opened earlier, and when closing Type B door 15, the A type door 14 of both sides must be closed earlier.

Claims (4)

1. hydraulic upward turnover type gate, comprise gate, hydraulic hoist (6), hydraulic power unit and control room, it is characterized in that: described gate is by 3 or 3 above unit gate transversely arranged compositions, described unit gate odd number is an A type door (14), even number is Type B door (15), each described A, Type B door (14,15) be provided with 2 vertical girders at least, the upper end of each described girder and with the oil cylinder upper hoisting head of the corresponding described hydraulic hoist of this girder quantity (6), by hanging hinge (5,7) be suspended on respectively and set up on the relative side of two box type steel structure beams (4) of isolation strip upstream and downstream between the double width bridge (8) each described A, Type B door (14, the middle part of girder 15) is hung head and is linked to each other respectively with under the oil cylinder of each described hydraulic hoist (6) by a hinge (11); Lower end at each described A, Type B door (14,15) is provided with 2 hydraulic lock assemblies (12) at least; The side water stop rubber (16) of being located at each described Type B door (15) both sides is pressed on the door leaf of the A type door (14) that is adjacent, and constitutes side direction sealing hermetically-sealed construction each other; The end water rubber (17) of being located at each described A, Type B door (14,15) bottom rear side is pressed on end bank (2) side, constitutes the bottom hermetically-sealed construction; The right lateral side of the left rear side of the leftmost A type of described gate door (14) and rightmost A type door (14) is equipped with water stop rubber, and it cooperates the sealing hermetically-sealed construction that constitutes described gate both sides with abutment wall.
2. hydraulic upward turnover type gate according to claim 1 is characterized in that: described A, Type B door (14,15) are the monolithic plane steel gate, and described Type B door (15) side direction and A, Type B door (14,15) bottom also are provided with stopping means; Described side water stop rubber (16) cross section is " Ω " type, and described end water rubber (17) cross section is " two P dumbbell " type; Also be provided with side sealing seat board at described A type door (14) with Type B door (15) side water stop rubber (16) place of pressing.
3. hydraulic upward turnover type gate according to claim 1 and 2 is characterized in that: described hydraulic power unit is two covers; Described hydraulic power unit and control room sunk type are arranged on the bank between the double width bridge (8); Described hydraulic hoist (6) also comprises the stroke measuring device that adopts built-in magnetostrictive displacement sensor and inductance approach switch, adopts the sync control device of flow speed control valve in conjunction with solenoid operated directional valve bypass draining correction mode.
4. hydraulic upward turnover type gate according to claim 1 and 2 is characterized in that: be provided with inspection platform (9) in the below of described hydraulic hoist (6); Described hydraulic lock assembly (12) is arranged on the center line lower end of described unit gate girder, it comprises locked cylinder, underwater heat measurement mechanism, lock bearing pin and be arranged on the platform of locking under water (13) on the end bank (2), in off position down, described lock shaft moves forward and backward under the driving of described locked cylinder, wear, take off combination with described platform (13) formation that locks under water, be used for locking or decontrol described gate, under opening, described hydraulic lock assembly (12) is connected with described inspection platform (9) locking; Locate also to be provided with a cover high pressure towards silt system (1) at bank of the described end (2).
CN2009200925651U 2009-08-24 2009-08-24 Hydraulic up-turning type gate Expired - Lifetime CN201459686U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009200925651U CN201459686U (en) 2009-08-24 2009-08-24 Hydraulic up-turning type gate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009200925651U CN201459686U (en) 2009-08-24 2009-08-24 Hydraulic up-turning type gate

Publications (1)

Publication Number Publication Date
CN201459686U true CN201459686U (en) 2010-05-12

Family

ID=42387039

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009200925651U Expired - Lifetime CN201459686U (en) 2009-08-24 2009-08-24 Hydraulic up-turning type gate

Country Status (1)

Country Link
CN (1) CN201459686U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666076B (en) * 2009-08-24 2011-01-12 黄河勘测规划设计有限公司 Hydraulic upward turnover type gate
CN103850344A (en) * 2014-02-21 2014-06-11 武汉圣禹排水系统有限公司 Top shaft type rapid flushing door
CN108640168A (en) * 2018-04-16 2018-10-12 浙江财经大学 A kind of drainage mechanism suitable for waste water control
CN113309048A (en) * 2021-05-28 2021-08-27 河海大学 Top shaft flap gate with trash rack

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101666076B (en) * 2009-08-24 2011-01-12 黄河勘测规划设计有限公司 Hydraulic upward turnover type gate
CN103850344A (en) * 2014-02-21 2014-06-11 武汉圣禹排水系统有限公司 Top shaft type rapid flushing door
CN108640168A (en) * 2018-04-16 2018-10-12 浙江财经大学 A kind of drainage mechanism suitable for waste water control
CN108640168B (en) * 2018-04-16 2021-07-23 浙江财经大学 Drainage mechanism suitable for sewage treatment
CN113309048A (en) * 2021-05-28 2021-08-27 河海大学 Top shaft flap gate with trash rack

Similar Documents

Publication Publication Date Title
CN101666076B (en) Hydraulic upward turnover type gate
Lewin Hydraulic gates and valves: In free surface flow and submerged outlets
CN201459686U (en) Hydraulic up-turning type gate
CN104452684B (en) The hollow flap gate of waterpower self-control
CN112323737A (en) Double-leaf flap gate
CN103437327A (en) Intermediately-hinged upturning steel gate
CN101691747B (en) Overlapped reciprocal bulkhead gate
KR101355949B1 (en) Flap gate
CN204940217U (en) A kind of ultra-large type plane splits arc triangle gate
CN203411956U (en) Nested top overflowing gate
CN104452682A (en) Automatic control type steel faceplate dam
CN204385699U (en) The hollow flap gate of waterpower self-control
CN201162208Y (en) Floater horizontal opening door
CN202347502U (en) Trunnion lodging type gate
CN205329647U (en) Prevent accumulational tail lock of silt
CN205242363U (en) But lift -type lower shaft rotates plane gate
CN201459685U (en) Stacked interacted water-stop gate
CN212316852U (en) Wheel type rail double-opening radial gate operated by hydraulic hoist
CN214460209U (en) Double-leaf flap gate
CN208830255U (en) A kind of multi-functional dyke of boundling main line
CN203514271U (en) Middle-hinged upturning steel gate
CN113463606A (en) Reconstruction and extension navigable building arrangement structure and construction method thereof
CN203247566U (en) Closed gate device of dam waterpower ship lift
CN206971183U (en) More than 200 meters superelevation dam reservoir emptying tunnel structures
CN105239538A (en) Liftable bottom-shaft rotating plane gate and application thereof

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20100512

Effective date of abandoning: 20090824