CN208056016U - Hydraulic engineering ice-breaking formula sluice - Google Patents
Hydraulic engineering ice-breaking formula sluice Download PDFInfo
- Publication number
- CN208056016U CN208056016U CN201820507533.2U CN201820507533U CN208056016U CN 208056016 U CN208056016 U CN 208056016U CN 201820507533 U CN201820507533 U CN 201820507533U CN 208056016 U CN208056016 U CN 208056016U
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- ice
- breaking
- gate
- sluice
- helper
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Abstract
The utility model discloses a kind of hydraulic engineering ice-breaking formula sluice, including gate pier, flood discharge sluice gate and portal trestle, activity is plugged with gate on gate pier, gate lifting gear is equipped between gate and portal trestle, two surface of gate is parallel equipped with the ice-breaking guide rail being vertically arranged respectively, is equipped with icebreaking device with the cooperation of ice-breaking guide rail, ice-breaking hanging apparatus is connected between icebreaking device and portal trestle, it is equipped with hoisting guiding rail across portal trestle, ice-breaking hanging apparatus is mounted in hoisting guiding rail；Cold district in winter, after gate both sides river surface freezes, when needing to operate gate, the ice face in flood discharge sluice gate is crushed first with icebreaking device, icebreaking device the other side can be moved to from the side of gate using hoisting guiding rail, the ice-breaking of gate both sides is facilitated to use, and then being smoothly turned on and off convenient for gate, it prevents enforced opening from being formed to gate and damages, eliminate defect existing for artificial ice-breaking and compressed gas interference method ice-breaking, use laborsaving convenient, safe operation.
Description
Technical field
The utility model is related to hydraulic engineering technical field more particularly to a kind of hydraulic engineering ice-breaking formula sluice.
Background technology
With the continuous development of society, water conservancy industry has obtained rapid development.In water conservancy industry, sluice is water conservancy work
Important component part in journey.Sluice is typically the device for being used for carrying out water storage or discharging water, particular by the keying to gate
Control, which is realized, to discharge water or water storage.Gate is divided by making material, mainly there is wooden gate, wooden boards Steel Structure gate, cast iron
Gate, reinforced concrete gate and steel-slag sand are divided by gate Men Dingyu horizontal plane relative positions, mainly there is extended-top type gate
With submergence type gate.It is divided by job specification, mainly there is main gate, emergency gate and bulkhead gate.By gate opening/closing method
It divides, the gate and change what control opened and closed using water pressure suffered by gate when fluctuation in stage that main useful mechanically actuated opens and closes
Hydro-automatic gate.
No matter which kind of gate, the relatively low area of temperature between gate pier sliding slot and gate in use, due to existing in winter
Non-current water, therefore be easy to form water body icing, cause gate normally to open and close difficulty, it is therefore desirable to carry out ice-breaking to river surface.It passes
The icebreaking method of system is artificial ice-breaking and compressed gas interference method ice-breaking, wherein artificial ice-breaking heavy workload, and operational hazards, it deposits
Sliding the danger such as water；And there are equipment complexity for the ice-breaking of compressed gas interference method, system power dissipation is big, and ice-breaking area is small, operation
The shortcomings of of high cost, the phenomenon that failure there is also ice-breaking when ice sheet is thicker, it is therefore necessary to sluice is improved, to avoid
Drawbacks described above.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of hydraulic engineerings that ice-breaking effect is good and easy to maintain
With ice-breaking formula sluice.
In order to solve the above technical problems, the technical solution of the utility model is：Hydraulic engineering ice-breaking formula sluice, including it is solid
Surely the gate pier arranged is formed with flood discharge sluice gate between the gate pier, and the gate pier top is fixed with portal trestle, the gate pier
Upper activity is plugged with the gate for blocking or opening the flood discharge sluice gate, and lock is equipped between the gate and the portal trestle
Door lifting gear, two surface of the gate is parallel equipped with the ice-breaking guide rail being vertically arranged respectively, is set with ice-breaking guide rail cooperation
There is icebreaking device, ice-breaking hanging apparatus is connected between the icebreaking device and the portal trestle, across the portal trestle
Equipped with hoisting guiding rail, the ice-breaking hanging apparatus is mounted in the hoisting guiding rail.
The icebreaking device includes the ice-breaking frame of portal structures as a preferred technical solution, the ice-breaking frame with it is described
Ice-breaking hanging apparatus connects, and the ice-breaking frame is convenient for moving in the ice-breaking guide rail close to opposite be equipped in one end of the gate
Dynamic walking roller, the lower section for being located at the ice-breaking frame are equipped with ice-breaking plate, and ice-breaking board bottom end is disposed with ice-breaking cone, described broken
It is disposed with ice-breaking plate driving device and ice-breaking returning device between slab and the ice-breaking frame；Further include being plugged in two ice-breakings
Door shape position-limited rack in guide rail is equipped with clamping screw between the door shape position-limited rack and the gate.
The ice-breaking plate driving device includes being fixedly mounted on the ice-breaking frame at least as a preferred technical solution,
The piston rod of two cylinders, the cylinder is fixedly attached to the ice-breaking plate.
The ice-breaking returning device includes being set to the ice-breaking plate and the ice-breaking frame relatively as a preferred technical solution,
Between return guide rod, setting is mounted through the ice-breaking frame in the return guide rod, the ice-breaking plate with it is described broken
It is set with return spring on the return guide rod between ice shelf.
The ice-breaking hanging apparatus includes being mounted in electronic in the hoisting guiding rail as a preferred technical solution,
Trolley, the motor-driven carrier bottom end has been connected by zipper hook, described to be hooked on the ice-breaking frame.
The gate lifting gear includes at least two liters be threadedly coupled with the gate as a preferred technical solution,
Screw rod drops, and the lifting screw top is fixedly attached to lifting motor, and the lifting motor is fixed on the portal trestle.
Activity is plugged with and safeguards helper in the gate pier of flood discharge sluice gate side as a preferred technical solution, institute
It states and safeguards that the grafting side of helper is equipped with halfpace, be equipped in the gate pier for accommodating the terraced slot for safeguarding helper, the ladder slot
Inner wall be equipped with the fastening platform of halfpace docking, it is described to safeguard that helper bottom end is positioned opposite and have at least two rows of shifting rollers,
It is disposed with the rolling wheel guide rails being used cooperatively with the shifting roller in the flood discharge sluice gate, it is described to safeguard that helper is sequentially connected someone
Terraced driving device.
The helper driving device includes running through the swivel nut for safeguarding that helper is prefabricated, institute as a preferred technical solution,
It states and corresponds to thread bush in swivel nut equipped with driving screw rod, driving screw rod one end rotation is set in the fastening platform, the driving
The screw rod other end is sequentially connected with driving motor.
Opposite be equipped with coordinates with the gate on the gate pier of flood discharge sluice gate both sides as a preferred technical solution,
Gate slot, the part gate slot through it is described safeguards helper be arranged, the gate slot bottom end be equipped with mud shovel.
As the improvement to above-mentioned technical proposal, the motor slot and driving groove of connection setting, institute are preset in the gate pier
Driving motor is stated in the motor slot, the end rotation of the driving screw rod is set in the driving groove.
By adopting the above-described technical solution, hydraulic engineering ice-breaking formula sluice, includes the gate pier of fixed and arranged, the lock
Flood discharge sluice gate is formed between pier, the gate pier top is fixed with portal trestle, on the gate pier activity be plugged with for sealing
Gate that is stifled or opening the flood discharge sluice gate, is equipped with gate lifting gear, the lock between the gate and the portal trestle
Two surfaces of door are parallel equipped with the ice-breaking guide rail being vertically arranged respectively, and icebreaking device is equipped with ice-breaking guide rail cooperation, described broken
It is connected with ice-breaking hanging apparatus between ice production apparatus and the portal trestle, hoisting guiding rail is equipped with across the portal trestle, it is described
Ice-breaking hanging apparatus is mounted in the hoisting guiding rail；The utility model has the beneficial effects that：Cold district in winter, lock
After door both sides river surface freezes, when needing to operate gate, the ice face in flood discharge sluice gate is crushed first with icebreaking device, utilizes lifting
Icebreaking device can be moved to the other side by guide rail from the side of gate, and the ice-breaking of gate both sides is facilitated to use, and then be convenient for gate
Be smoothly turned on and off, prevent enforced opening from being formed to gate and damage, it is broken to eliminate artificial ice-breaking and compressed gas interference method
Defect existing for ice uses laborsaving convenient, safe operation.
Description of the drawings
The following drawings is only intended in doing schematic illustration and explanation to the utility model, does not limit the model of the utility model
It encloses.Wherein：
Fig. 1 is the structural schematic diagram of one closing gate state of the utility model embodiment；
Fig. 2 is the structural schematic diagram of one ice-breaking frame of the utility model embodiment；
Fig. 3 is the structural schematic diagram of one icebreaking device of the utility model embodiment；
Fig. 4 is the part-structure schematic diagram of the utility model embodiment two；
In figure：1- gate piers；2- flood discharge sluice gates；3- portal trestles；4- gates；5- lifting screws；6- lifting motors；7- ice-breakings
Guide rail；8- hoisting guiding rails；9- ice-breaking framves；10- walking rollers；11- ice-breaking plates；12- ice-breakings are bored；13- shape position-limited racks；14- locks
Tight bolt；15- cylinders；16- return guide rods；17- return springs；18- motor-driven carriers；19- is linked up with；20- safeguards helper；21-
Terraced slot；22- fastens platform；23- shifting rollers；24- rolling wheel guide rails；25- swivel nuts；26- drives screw rod；27- driving motors；28- electricity
Trough；29- driving grooves；30- gate slotes；31- mud shovels.
Specific implementation mode
With reference to the accompanying drawings and examples, the utility model is expanded on further.In the following detailed description, only pass through
Bright mode describes certain exemplary embodiments of the utility model.Undoubtedly, those skilled in the art can be with
It recognizes, it, can be with a variety of different modes to described without departing from the spirit and scope of the utility model
Embodiment is modified.Therefore, attached drawing and description are regarded as illustrative in nature, rather than the protection for limiting claim
Range.
Embodiment one：
As shown in Figure 1, Figure 2 and Figure 3, hydraulic engineering ice-breaking formula sluice, includes the gate pier 1 of fixed setting, the gate pier 1
Setting number can freely be adjusted according to the width of river surface, be formed with flood discharge sluice gate 2 between the gate pier 1, the gate pier 1 pushes up
It holds and is fixed with portal trestle 3, the movable gate 4 being plugged with for blocking or opening the flood discharge sluice gate 2 on the gate pier 1,
Gate lifting gear is equipped between the gate 4 and the portal trestle 3, specifically, the gate lifting gear includes and institute
At least two lifting screws 5 of the threaded connection of gate 4 are stated, 5 top of the lifting screw is fixedly attached to lifting motor 6, described
Lifting motor 6 is fixed on the portal trestle 3.5 positive and negative rotation of the lifting screw is driven by the lifting motor 6, it is described
Lifting screw 5 drives the gate 4 to rise or fall according to the difference of positive and negative rotation, when the gate 4 rises, the flood discharge sluice gate
2 open progress waterproof；When the gate 4 declines, the flood discharge sluice gate 2 is closed.
4 liang of surfaces of the gate are parallel equipped with the ice-breaking guide rail 7 being vertically arranged respectively, set with the ice-breaking guide rail 7 cooperation
There is icebreaking device, ice-breaking hanging apparatus is connected between the icebreaking device and the portal trestle 3, across the portal trestle
3 are equipped with hoisting guiding rail 8, and the ice-breaking hanging apparatus is mounted in the hoisting guiding rail 8.The icebreaking device includes door shape
The ice-breaking frame 9 of structure, the ice-breaking frame 9 are connect with the ice-breaking hanging apparatus, and the ice-breaking frame 9 is close to the one of the gate 4
It holds relative to being equipped with convenient for the walking roller 10 moved in the ice-breaking guide rail 7, is located at the lower section of the ice-breaking frame 9 equipped with broken
Slab 11,11 bottom end of ice-breaking plate are disposed with ice-breaking cone 12, ice-breaking are disposed between the ice-breaking plate 11 and the ice-breaking frame 9
Plate driving device and ice-breaking returning device；Further include the door shape position-limited rack 13 being plugged in the two ice-breaking guide rails 7, the door shape
Clamping screw 14 is equipped between position-limited rack 13 and the gate 4.
Specifically, the ice-breaking plate driving device includes at least two cylinders 15 being fixedly mounted on the ice-breaking frame 9,
The cylinder 15 is connected to air source, and the piston rod of the cylinder 15 is fixedly attached to the ice-breaking plate 11.The ice-breaking return dress
It sets including the opposite return guide rod 16 being set between the ice-breaking plate 11 and the ice-breaking frame 9, the return guide rod 16 passes through
It wears the ice-breaking frame 9 and setting is mounted, covered on the return guide rod 16 between the ice-breaking plate 11 and the ice-breaking frame 9
Equipped with return spring 17.
When needing ice-breaking, the two of the icebreaking device walking rollers 10 are docked in the ice-breaking guide rail 7, are led to
Crossing manpower pulls cooperation, the ice-breaking frame 9 to drive the ice-breaking plate 11 to be moved to close to ice face, start the cylinder 15 at this time,
By the intermittent unlatching control to the cylinder 15, realize that 12 intermittent hammering ice faces are bored in the ice-breaking, primary hammering is completed
Afterwards, 15 piston return of the cylinder and the return guide rod 16, the return spring 17 cooperation under self-return, prepare
Hammering tasks next time, until ice face is beaten broken by ice-breaking cone 12, the ice face for completing 4 side of the gate is abolished；Pass through institute
It states ice-breaking hanging apparatus to move up icebreaking device, and coordinates with the hoisting guiding rail 8, complete to move to the icebreaking device described
The other side of gate 4 carries out ice-breaking, and icebreaking method is consistent with the above process, is no longer described in detail herein.During ice-breaking,
It is using the clamping screw 14 that 13 plugged and fixed of door shape position-limited rack is good, the walking roller 10 is formed and is limited, is prevented
During ice-breaking under the action of reaction force, the walking roller 10 is made to move up, and then ensures the hammering of the ice-breaking cone 12
Dynamics.
The ice-breaking hanging apparatus of the present embodiment includes being mounted in the motor-driven carrier 18 in the hoisting guiding rail 8,
18 bottom end of the motor-driven carrier has been connected by zipper hook 19, and the hook 19 is hooked on the ice-breaking frame 9.It is described electronic
Trolley 18 is connected to power supply by conducting wire, by the moving direction control to the motor-driven carrier 18, realizes the icebreaking device
The change of position is moved to the other side from the side of the portal trestle 3, in order to break the ice face of 4 both sides of the gate
It is broken.
Embodiment two：
As shown in figure 4, the difference between this embodiment and the first embodiment lies in：In the gate pier 1 of 2 side of flood discharge sluice gate
Activity, which is plugged with, safeguards helper 20, and the grafting side for safeguarding helper 20 is equipped with halfpace, is equipped in the gate pier 1 for accommodating
The terraced slot 21 for safeguarding helper 20 is stated, the inner wall of the ladder slot 21 is equipped with the fastening platform 22 of halfpace docking, described to safeguard people
Terraced 20 bottom ends are positioned opposite at least two rows of shifting rollers 23, is disposed in the flood discharge sluice gate 2 and matches with the shifting roller 23
The rolling wheel guide rails 24 used are closed, it is described to safeguard that helper 20 is sequentially connected with helper driving device.
The helper driving device includes running through the swivel nut 25 for safeguarding that helper 20 is prefabricated, and spiral shell is corresponded in the swivel nut 25
Line is set with driving screw rod 26, and 26 one end of driving screw rod rotation is set in the fastening platform 22, and the driving screw rod 26 is another
One end is sequentially connected with driving motor 27, if when the driving 26 too long bad installation of screw rod, can pacify its segmented welding
Dress, has no effect on the screw-thread fit of itself and the swivel nut 25.Motor slot 28 and the transmission of connection setting are preset in the gate pier 1
Slot 29, the driving motor 27 are set in the motor slot 28, and the end rotation of the driving screw rod 26 is set to the driving groove
In 29.The driving motor 27 can be connect with the driving screw rod 26 respectively with by chain drive.2 both sides of flood discharge sluice gate
With respect to equipped with the gate slot 30 coordinated with the gate 4 on the gate pier 1, the part gate slot 30 safeguards that helper 20 is set through described
It sets, 30 bottom end of the gate slot is equipped with mud shovel 31.The mud shovel 31 can root out the sludge in the rolling wheel guide rails 24,
In order to the smooth movement for safeguarding helper 20.The driving screw rod 26 is oppositely arranged in described safeguard in helper 20, and position
In the both sides of the gate slot 30, the switching motion of the gate 4 is not interfered.
River levee is withered need to safeguard when, the cooperation of the driving motor 27 and the driving screw rod 26 can be utilized institute
It states and safeguards that helper 20 removes the gate pier 1, in order to which maintenance personnel safeguards to walk down toward river bed to each component on helper 20 from described
It is safeguarded, it is easy to use, it is easy to operate.After use, then pass through the driving motor 27 and the driving screw rod 26
Cooperation safeguards that helper 20 moves in the terraced slot 21 by described.Described safeguard also is provided with the gate slot 30 on helper 20, with
It closes and uses convenient for the gate 4.
The utility model cold district in winter, after 4 both sides river surface of gate freezes, when needing to operate gate 4, first with broken
Ice face in flood discharge sluice gate 2 is crushed by ice production apparatus, can be moved to icebreaking device from the side of gate 4 using hoisting guiding rail 8
The other side facilitates 4 both sides ice-breaking of gate to use, and then being smoothly turned on and off convenient for gate 4, prevents enforced opening to gate
4 form damage, eliminate defect existing for artificial ice-breaking and compressed gas interference method ice-breaking, use laborsaving convenient, safe operation.
The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (10)
1. hydraulic engineering ice-breaking formula sluice, includes the gate pier of fixed and arranged, flood discharge sluice gate is formed between the gate pier, it is described
Gate pier top is fixed with portal trestle, it is characterised in that：Activity is plugged with for blocking or opening described let out on the gate pier
The gate of big vast sluice gate is equipped with gate lifting gear between the gate and the portal trestle, two surface of the gate is put down respectively
Row is equipped with the ice-breaking guide rail being vertically arranged, and icebreaking device, the icebreaking device and the door are equipped with ice-breaking guide rail cooperation
It is connected with ice-breaking hanging apparatus between shape holder, hoisting guiding rail, the ice-breaking hanging apparatus limit are equipped with across the portal trestle
Position is installed in the hoisting guiding rail.
2. hydraulic engineering as described in claim 1 ice-breaking formula sluice, it is characterised in that：The icebreaking device includes door shape knot
The ice-breaking frame of structure, the ice-breaking frame are connect with the ice-breaking hanging apparatus, and the ice-breaking frame is opposite close to one end of the gate
Walking roller convenient for being moved in the ice-breaking guide rail is installed, the lower section for being located at the ice-breaking frame is equipped with ice-breaking plate, described
Ice-breaking board bottom end is disposed with ice-breaking cone, and ice-breaking plate driving device is disposed between the ice-breaking plate and the ice-breaking frame and ice-breaking is returned
Position device；Further include the door shape position-limited rack being plugged in the two ice-breaking guide rails, between the door shape position-limited rack and the gate
Equipped with clamping screw.
3. hydraulic engineering as claimed in claim 2 ice-breaking formula sluice, it is characterised in that：The ice-breaking plate driving device includes
The piston rod of at least two cylinders being fixedly mounted on the ice-breaking frame, the cylinder is fixedly attached to the ice-breaking plate.
4. hydraulic engineering as claimed in claim 2 ice-breaking formula sluice, it is characterised in that：The ice-breaking returning device includes phase
To the return guide rod between the ice-breaking plate and the ice-breaking frame, the return guide rod is limited through the ice-breaking frame
Installation settings is set with return spring on the return guide rod between the ice-breaking plate and the ice-breaking frame.
5. the hydraulic engineering ice-breaking formula sluice as described in claim 2 to 4 any claim, it is characterised in that：It is described broken
Ice hanging apparatus includes being mounted in the motor-driven carrier in the hoisting guiding rail, and the motor-driven carrier bottom end is connected by zipper
There is hook, it is described to be hooked on the ice-breaking frame.
6. hydraulic engineering as claimed in claim 2 ice-breaking formula sluice, it is characterised in that：The gate lifting gear include with
At least two lifting screws that the gate is threadedly coupled, the lifting screw top is fixedly attached to lifting motor, the liter
Drop motor is fixed on the portal trestle.
7. hydraulic engineering as claimed in claim 6 ice-breaking formula sluice, it is characterised in that：Flood discharge sluice gate side it is described
Activity, which is plugged with, in gate pier safeguards helper, and the grafting side for safeguarding helper is equipped with halfpace, is equipped in the gate pier for accommodating
The inner wall of the terraced slot for safeguarding helper, the ladder slot is equipped with the fastening platform of halfpace docking, described to safeguard helper bottom end
It is positioned opposite to have at least two rows of shifting rollers, it is disposed with the idler wheel being used cooperatively with the shifting roller in the flood discharge sluice gate and leads
Rail, it is described to safeguard that helper is sequentially connected with helper driving device.
8. hydraulic engineering as claimed in claim 7 ice-breaking formula sluice, it is characterised in that：The helper driving device includes passing through
The swivel nut for safeguarding that helper is prefabricated is worn, thread bush is corresponded in the swivel nut equipped with driving screw rod, described driving screw rod one end turns
Dynamic to be set in the fastening platform, the driving screw rod other end is sequentially connected with driving motor.
9. hydraulic engineering as claimed in claim 8 ice-breaking formula sluice, it is characterised in that：Flood discharge sluice gate both sides it is described
With respect to equipped with the gate slot coordinated with the gate on gate pier, the part gate slot safeguards that helper is arranged through described, the gate slot
Bottom end is equipped with mud shovel.
10. hydraulic engineering as claimed in claim 9 ice-breaking formula sluice, it is characterised in that：Connection is preset in the gate pier
The motor slot and driving groove of setting, the driving motor are set in the motor slot, and the end rotation of the driving screw rod is set to
In the driving groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820507533.2U CN208056016U (en) | 2018-04-11 | 2018-04-11 | Hydraulic engineering ice-breaking formula sluice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820507533.2U CN208056016U (en) | 2018-04-11 | 2018-04-11 | Hydraulic engineering ice-breaking formula sluice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208056016U true CN208056016U (en) | 2018-11-06 |
Family
ID=63985756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820507533.2U Expired - Fee Related CN208056016U (en) | 2018-04-11 | 2018-04-11 | Hydraulic engineering ice-breaking formula sluice |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208056016U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322911A (en) * | 2021-05-26 | 2021-08-31 | 石柳 | Sluice device that opens ice for hydraulic engineering |
| CN114960574A (en) * | 2022-07-01 | 2022-08-30 | 浙江江能建设有限公司 | Anti-freezing device for gate |
| CN116122212A (en) * | 2023-04-17 | 2023-05-16 | 中铁三局集团有限公司 | Push type track snow removing device |
-
2018
- 2018-04-11 CN CN201820507533.2U patent/CN208056016U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322911A (en) * | 2021-05-26 | 2021-08-31 | 石柳 | Sluice device that opens ice for hydraulic engineering |
| CN113322911B (en) * | 2021-05-26 | 2022-06-28 | 福建省铂盾建设工程有限公司 | Sluice device that opens ice for hydraulic engineering |
| CN114960574A (en) * | 2022-07-01 | 2022-08-30 | 浙江江能建设有限公司 | Anti-freezing device for gate |
| CN116122212A (en) * | 2023-04-17 | 2023-05-16 | 中铁三局集团有限公司 | Push type track snow removing device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 Termination date: 20200411 |
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| CF01 | Termination of patent right due to non-payment of annual fee |