CN217781919U - Navigation river course super large span keeps off tide gate - Google Patents
Navigation river course super large span keeps off tide gate Download PDFInfo
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- CN217781919U CN217781919U CN202220742830.1U CN202220742830U CN217781919U CN 217781919 U CN217781919 U CN 217781919U CN 202220742830 U CN202220742830 U CN 202220742830U CN 217781919 U CN217781919 U CN 217781919U
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Abstract
The utility model discloses a navigation river course super large span keeps off damp gate, include: constructing left and right door slots which are arranged at the left and right bank sides of the river channel and are positioned at the left and right sides of the center tide blocking position of the river channel; the left door groove and the right door groove are respectively inserted into the left door groove and the right door groove, and the left side part and the right side part of the floating box type moisture-proof gate body are limited; and the water injection and drainage system is arranged in the buoyancy tank type tide-blocking gate body and is used for injecting water or draining water into the buoyancy tank type tide-blocking gate body, and the water injection and drainage system controls the floating and sinking state of the buoyancy tank type tide-blocking gate body by controlling the internal water quantity of the buoyancy tank type tide-blocking gate body. The utility model discloses can realize fast that important channel meets with the requirement of keeping off the tide when extreme weather.
Description
Technical Field
The utility model relates to a keep off damp gate technical field, especially relate to a navigation river course super large span keeps off damp gate.
Background
The sluice is an important hydraulic structure on various river channels, and the water level and the flow of upstream and downstream are artificially controlled by opening or closing the sluice, so that the purposes of blocking tide, preventing flood, discharging flood, water landscape, water resource scheduling and the like are realized.
At the intersection of the river and the sea, the rise of marine shipping drives the business prosperity, and the business is developed into a plurality of large-scale and even oversize cities, such as New York, tokyo, shanghai and the like, and a great amount of population and social wealth are gathered. The adverse effects are further aggravated by multiple influences of upstream flood discharge, downstream tide level jacking, regional waterlogging, typhoon erosion and the like in the regions for a long time, the continuously developed ground settlement and sea level rising trends, especially the loss is more and more serious due to frequent occurrence of extreme weather and storm surge in recent decades, and the demand for building the estuary tide-blocking gate is more and more urgent.
However, due to the navigation requirement of the huge ship, the tidal gate must have the characteristics of ultra-large span and ultra-high headroom, which puts higher requirements on the gate arrangement.
To this end, the applicant has sought, through useful research and research, a solution to the above-mentioned problems, in the context of which the technical solutions to be described below have been made.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: the ultra-large span tidal gate for the navigation river is provided aiming at the defects of the prior art.
The utility model discloses the technical problem that will solve can adopt following technical scheme to realize:
the utility model provides a navigation river course super large span keeps off tide gate, includes:
constructing left and right door slots which are arranged at the left and right bank sides of the river channel and are positioned at the left and right sides of the center tide blocking position of the river channel;
the left door groove and the right door groove are respectively inserted into the left door groove and the right door groove, and the left side part and the right side part of the floating box type moisture-proof gate body are limited; and
and the water injection and drainage system is arranged in the floating box type tide blocking gate body and is used for injecting water or draining water into the floating box type tide blocking gate body, and the water injection and drainage system controls the floating state of the floating box type tide blocking gate body by controlling the internal water quantity of the floating box type tide blocking gate body.
In a preferred embodiment of the present invention, the buoyancy chamber type tidal gate body has a fish belly type structure, the thickness of the door body part located in the center of the river is large, and the thickness of the door body part close to the edge of the river is small.
The utility model discloses a preferred embodiment, be provided with a plurality of horizontal baffles along the vertical direction interval in the flotation tank formula tide-blocking gate body, a plurality of horizontal baffles will the flotation tank layer that a plurality of range upon range of arrangements were separated into to the inside of flotation tank formula tide-blocking gate body, be provided with a plurality of vertically and horizontally staggered's vertical baffle in each flotation tank layer, a plurality of vertically and horizontally staggered's vertical baffle will the flotation tank layer inside separate into a plurality of independent sealed flotation tank storehouses, annotate drainage system and can carry out water injection or drainage to each flotation tank storehouse alone, control the water yield in each flotation tank storehouse.
In a preferred embodiment of the present invention, at least a left and a right mooring posts are disposed at the top periphery of the left and right gate slots, and at least a left and a right gate winches are disposed in the top portions of the left and right side portions of the pontoon type damp-proof gate body; when the floating box type tide blocking gate body is conveyed to the central tide blocking position of the river channel, one end of a left cable and one end of a right cable of each left gate winch and one end of a right cable of each right gate winch are sleeved and tied on the corresponding left mooring post and the corresponding right mooring post, and the left side part and the right side part of the floating box type tide blocking gate body are sequentially guided into the left gate groove and the right gate groove by controlling the left gate winch and the right gate winch.
In a preferred embodiment of the present invention, left and right arc-shaped guide blocks are disposed on the outer side surfaces of the left and right side portions of the floating box type damp-proof gate body, and the left and right arc-shaped guide blocks are used for guiding the left and right side portions of the floating box type damp-proof gate body to the left and right gate grooves.
In a preferred embodiment of the present invention, the moisture-proof side corners of the left and right door grooves are arc-shaped.
In a preferred embodiment of the present invention, the inner side surface of the moisture-blocking side and the inner side surface of the non-moisture-blocking side of the left door groove are symmetrically provided with a first and a second left positioning grooves extending along the vertical direction, and the inner side surface of the moisture-blocking side and the inner side surface of the non-moisture-blocking side of the right door groove are symmetrically provided with a first and a second right positioning grooves extending along the vertical direction; work as left and right side portion of the buoyancy tank formula tide gate body inserts behind left and right gate inslot embedding first, second left side location stopper in first, the left positioning groove of second, through first, the left positioning stopper of second is right the left side portion of the buoyancy tank formula tide gate body advances line location first, the right positioning stopper of second of embedding in first, the right positioning groove of second, through first, the right positioning stopper of second is right the right side portion of the buoyancy tank formula tide gate body advances line location.
The utility model discloses a preferred embodiment, when being in not keeping off the tide during, be provided with left access door in the left door inslot, the both sides part of left side access door is inlayed respectively and is established in first, the left positioning groove of second, through the water of pumping out the left door inslot, can do the operation or overhaul left door groove, the right door inslot is provided with right access door, the both sides part of right access door is inlayed respectively and is established in first, the right positioning groove of second, through the water of pumping out the right door inslot, can do the operation or overhaul right door groove.
In a preferred embodiment of the present invention, the left access door is composed of a plurality of left buoyancy tank beams stacked in sequence from bottom to top, and the right access door is composed of a plurality of right buoyancy tank beams stacked in sequence from bottom to top.
In a preferred embodiment of the present invention, the non-moisture-proof side inner side surface of the left door groove is located on one side of the second left positioning groove, and the non-moisture-proof side inner side surface of the right door groove is located on one side of the second right positioning groove.
In a preferred embodiment of the present invention, a plurality of bottom water stopping structures are disposed on the bottom surface of the float chamber type damp-proof gate body at intervals along the water flow direction.
In a preferred embodiment of the present invention, the bottom water stopping structure is a replaceable high pressure air bag or a rubber water stopping strip.
Owing to adopted above technical scheme, the beneficial effects of the utility model reside in that:
1. the utility model is a single-hole whole-leaf floating box type gate, the span of which can reach hundreds of meters, and the floating and sinking and floating transportation can be realized by water drainage and water filling, so that the moisture-proof requirement of an important channel when meeting extreme weather can be quickly realized;
2. the utility model adopts the floating box type damp-proof gate body and is provided with the guiding device and the positioning device, thereby not only solving the problem of floating transportation, but also realizing the opening and closing in the gate slot, being easy to position, and in addition, the bottom plate of the gate is not provided with a track, the gate can not be blocked when moving, thereby solving a series of difficulties of the giant gate;
3. the utility model solves the problems of inclination, safety and the like when the gate is transported in a floating way or installed by adjusting the water filling and draining sequence of the independently sealed buoyancy tank bin and correcting the deviation through the guiding device;
4. the left and right access doors can be arranged in the left and right door slots of the utility model, so as to realize the maintenance of the waterless environment in the door slots; meanwhile, the left and right access doors adopt buoyancy tank stoplog doors, the open-close condition of still water is fully utilized, and the left and right access doors can be pressed down one by one and float one by one so as to greatly reduce the hoisting load and height;
6. the utility model discloses a floating dock overhauls the large-span gate, and make full use of social resource reduces and overhauls the facility, reduces and overhauls the degree of difficulty, perhaps utilizes floating dock again, transports the gate from bank mill or transports into the mill and overhauls, realizes the gate overhaul.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of the plane seating process of the present invention.
Fig. 2 is a schematic plan view of the right side of the float-box type damp-proof gate of the present invention inserted into the right gate slot.
Fig. 3 is a schematic elevation view of the right side of the float-box type damp-proof gate body of the present invention inserted into the right gate slot.
Fig. 4 is a schematic plan view of the left side of the float-box type damp-proof gate body of the present invention inserted into the left gate slot.
Fig. 5 is a schematic view of the left side of the float-box type damp-proof gate body inserted into the left gate slot.
Fig. 6 is a schematic plan view of the utility model under the working condition of damp-proof.
Fig. 7 is a schematic view of the vertical surface of the utility model under the working condition of damp-proof.
Fig. 8 is a transverse sectional view of the float-box type damp-proof gate body of the present invention.
Fig. 9 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 8.
Fig. 10 is a sectional view taken along line B-B of fig. 8.
Fig. 11 is a partially enlarged schematic view of the left side of the float-box type moisture-proof gate body of the present invention when it is inserted into the left gate slot.
Fig. 12 is a schematic view of the left door slot of the present invention under the working condition of damp-proof.
Fig. 13 is a schematic view of the right door slot of the utility model under the working condition of damp-proof.
Fig. 14 is a schematic view of the present invention during maintenance.
Fig. 15 is a schematic structural view of the left and right access doors of the present invention.
Fig. 16 is an installation schematic diagram of the left and right water stop rubber sealing strips of the present invention.
Fig. 17 is a longitudinal structure schematic diagram of the float-box type damp-proof gate body of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1 to 7, there is shown a navigation river super-span tidal gate, which comprises left and right gate slots 100a, 100b, a buoyancy tank type tidal gate body 200, and a water injection and drainage system (not shown).
The left and right gate grooves 100a and 100b are constructed at the left and right banks of the river course and located at the left and right sides of the center tidal barrier position of the river course, and are used for limiting the left and right sides of the buoyancy tank type tidal barrier gate body 200.
The pontoon type tidal barrier gate 200 is transported to the center tidal barrier position of the river by a tug boat, and the left and right side portions thereof are respectively inserted into the left and right gate slots 100a, 100 b. The float chamber type tidal gate 200 has a fish belly structure, and the gate portion located at the center of the river has a large thickness and the gate portion located near the side of the river has a small thickness. Referring to fig. 8 to 9, a plurality of horizontal partition plates 210 are arranged in the buoyancy tank type moisture-blocking gate body 200 at intervals along the vertical direction, the plurality of horizontal partition plates 210 partition the interior of the buoyancy tank type moisture-blocking gate body 200 into a plurality of buoyancy tank layers which are arranged in a stacked manner, a plurality of criss-cross vertical partition plates 220 are arranged in each buoyancy tank layer, and the plurality of criss-cross vertical partition plates 220 partition the interior of each buoyancy tank layer into a plurality of independent sealed buoyancy tank chambers 201.
The water injection and drainage system is arranged in the floating box type tidal barrier gate body 200 and is used for injecting water or draining water into or from the floating box type tidal barrier gate body 200, specifically, water can be injected or drained into or from each floating box bin 201 independently, the water quantity of each floating box bin 201 is controlled, and therefore the floating state of the floating box type tidal barrier gate body 200 is controlled by controlling the internal water quantity of the floating box type tidal barrier gate body 200.
A plurality of left and right mooring posts 110a, 110b are provided at intervals at the top peripheral edges of the left and right gate grooves 100a, 100b, and a plurality of left and right gate winches (not shown) are provided in the tops of the left and right side portions of the pontoon-type moisture barrier gate body 200. When the pontoon-type moisture-proof gate body 200 is transported to the position of the river channel central moisture-proof position, one end of the left and right cables 210a, 210b of each of the left and right gate winches is sleeved and tied on the corresponding left and right mooring posts 110a, 110b, and the left and right side parts of the pontoon-type moisture-proof gate body 200 are sequentially guided into the left and right gate grooves 100a, 100b by controlling the left and right gate winches.
The left and right arc-shaped guide blocks 220a and 220b are arranged on the outer side surfaces of the left and right side parts of the floating box type tide-blocking gate body 200, and the left and right arc-shaped guide blocks 220a and 220b are used for guiding the left and right side parts of the floating box type tide-blocking gate body 200 into the left and right gate slots 100a and 100 b.
The corners of the moisture-proof sides of the left and right door slots 100a, 100b are arc-shaped, so as to prevent the floating box type moisture-proof gate body 200 from being damaged due to collision when the floating box type moisture-proof gate body 200 enters.
Referring to fig. 1 to 7, the plane in-place operation method of the buoyancy tank type tidal gate body 200 of the present invention is as follows:
the left and right arc-shaped guide blocks 220a and 220b arranged on the floating box type damp-proof gate body 200 are used as guide devices and also used as gate verticality adjusting devices, left and right mooring columns 110a and 110b arranged on the outer sides of the left and right gate slots 100a and 100b adopt left and right gate winches to pull the floating box type damp-proof gate body 200 towards the left and right gate slots 100a and 100b, on one hand, the verticality of the floating box type damp-proof gate body 200 is gradually adjusted through the left and right arc-shaped guide blocks 220a and 220b, the right side of the floating box type damp-proof gate body 200 is firstly guided into the right gate slot 100b, and then the left side of the floating box type damp-proof gate body 200 is pulled into the left gate slot 100a, so that the plane is in place.
The verticality of the floating box type damp-proof gate body 200 is adjusted as follows:
1. initial adjustment: the floating box type damp-proof gate body 200 utilizes a plurality of rows of floating box bins 201 formed in the floating box type damp-proof gate body to control the floating state of the floating box type damp-proof gate body, adjusts the water injection and drainage sequence of the floating box bins 201, and preliminarily controls the vertical inclination angle of the floating box type damp-proof gate body 200 so as to ensure the stability of floating transportation;
2. fine adjustment: before the floating box type damp-proof gate body 200 enters the right gate groove 100b or the left gate groove 100a, after the plane is in place, the floating box type damp-proof gate body 200 is guided by the right arc-shaped guide block 220b or the left arc-shaped guide block 220a, and the top of the floating box type damp-proof gate body 200 is pulled to complete perpendicularity adjustment;
3. the gate is vertically in position: injecting water into a buoyancy tank bin 201 of the buoyancy tank type damp-proof gate body 200, so that the buoyancy tank type damp-proof gate body 200 sinks to a gate bottom plate to retain water;
4. positioning a gate: after the buoyancy tank type moisture-proof gate body 200 is in place in the plane and vertically, a positioning plug is placed in the buoyancy tank type moisture-proof gate body to fix the position of the gate, so that the gate is prevented from inclining and moving in the water flow direction due to water level difference and waves, and meanwhile, the side wall of the left gate slot 100a is tightly propped by the left arc-shaped guide block 200a and the cable is tensioned, so that the gate is controlled to move in the vertical water flow direction, as shown in fig. 11.
Referring to fig. 14, when the device is in a non-moisture-blocking period, a left access door 140a is disposed in the left door groove 100a, and both side portions of the left access door 140a are respectively embedded in the left positioning grooves 120a and 130a, and the left door groove 100a can be dried or overhauled by draining the water in the left door groove 100 a. A right access door 140b is arranged in the right door groove 100b, two side parts of the right access door 140b are respectively embedded in the right positioning grooves 120b and 130b, and dry operation or maintenance can be carried out on the right door groove 100b by draining the water body in the right door groove 100 b. The left access door 140a is composed of a plurality of left pontoon beams 141a stacked in sequence from bottom to top, and the right access door 140b is composed of a plurality of right pontoon beams 141b stacked in sequence from bottom to top, as shown in fig. 15.
The utility model makes full use of the advantage that the left and right access doors 140a and 140b are opened and closed by still water, realizes the maintenance of the waterless environment in the door slot, adopts the multi-section left and right buoyancy tank beams 141a and 141b, namely, the left and right buoyancy tank beams 141a and 141b are put in section by section in the operation on the water surface, and the left and right buoyancy tank beams 141a and 141b are pressed to the bottom plate section by the dead weight of the upper door, thereby realizing the water retaining; when the door is opened, the upper door is lifted out of the water surface, and the underwater left and right buoyancy tank beams 141a and 141b float out of the water surface section by section and are lifted out section by section, so that the lifting load and the height are greatly reduced.
Because the floodgate that keeps off the tide only has great tide potential difference in the short duration of climax, under most circumstances, the tide potential difference is less, and partial view considers not necessarily considering the gate stagnant water, nevertheless in order to perfect the utility model discloses, the well stagnant water of considering of the utility model. In order to improve the moisture-proof sealing performance, a left water-stopping rubber sealing strip 150a is arranged on one side of the left positioning groove 130a on the inner side surface of the left door groove 100a on the non-moisture-proof side, and a right water-stopping rubber sealing strip 150b is arranged on one side of the right positioning groove 130b on the inner side surface of the right door groove 100b on the non-moisture-proof side, and P-type rubber water-stopping strips are preferably adopted as the left and right water-stopping rubber sealing strips 150a, 150b, as shown in fig. 16. In addition, a plurality of bottom water stopping structures 230 are arranged on the bottom surface of the pontoon type damp-proof gate body 200 at intervals along the water flow direction, and the bottom water stopping structures 230 are replaceable high-pressure air bags or rubber water stopping strips, as shown in fig. 17.
The utility model discloses a when the flotation tank formula keeps off damp gate body 200 need overhaul, it is huge to consider the large-span gate size, overhauls the difficulty, the utility model discloses set up attached facility in left and right gate slot 100a, 100b, furthest has reduced the maintenance frequency. Once the gate is overhauled, the floating dock can be used to drive to the floating box type tidal barrier gate body 200, and the gate is overhauled after floating. If the maintenance is larger, the floating dock can be used to transport the floating box type tidal barrier gate body 200 out of the shore factory or into the factory for maintenance.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (12)
1. The utility model provides a navigation river course super large span tide gate which characterized in that includes:
constructing left and right door slots which are arranged at the left and right bank sides of the river channel and are positioned at the left and right sides of the center tide blocking position of the river channel;
the left door groove and the right door groove are respectively inserted into the left door groove and the right door groove, and the left side part and the right side part of the buoyancy tank type moisture-proof gate body are limited by the left door groove and the right door groove; and
and the water injection and drainage system is arranged in the floating box type tide blocking gate body and is used for injecting water or draining water into the floating box type tide blocking gate body, and the water injection and drainage system controls the floating state of the floating box type tide blocking gate body by controlling the internal water quantity of the floating box type tide blocking gate body.
2. The navigable river super-span moisture barrier gate according to claim 1, wherein the buoyancy tank type moisture barrier gate body has a fish belly type structure, the thickness of the gate body part located at the center of the river is large, and the thickness of the gate body part close to the edge of the river is small.
3. The navigable river super-span moisture-proof gate according to claim 2, wherein a plurality of horizontal partition plates are arranged in the buoyancy tank type moisture-proof gate body at intervals along the vertical direction, the plurality of horizontal partition plates divide the interior of the buoyancy tank type moisture-proof gate body into a plurality of buoyancy tank layers which are arranged in a stacked manner, a plurality of criss-cross vertical partition plates are arranged in each buoyancy tank layer, the criss-cross vertical partition plates divide the interior of the buoyancy tank layer into a plurality of independent sealed buoyancy tank chambers, and the water injection and drainage system can independently inject water or drain water into each buoyancy tank chamber to control the water quantity of each buoyancy tank chamber.
4. The navigable river super-span moisture-blocking gate according to claim 1, wherein at least one left and right bollard is provided at the top periphery of the left and right gate grooves, and at least one left and right gate winches are provided in the top portions of the left and right side portions of the pontoon type moisture-blocking gate body; when the floating box type tide blocking gate body is conveyed to the central tide blocking position of the river channel, one end of a left cable and one end of a right cable of each left gate winch and one end of a right cable of each right gate winch are sleeved and tied on the corresponding left mooring post and the corresponding right mooring post, and the left side part and the right side part of the floating box type tide blocking gate body are sequentially guided into the left gate groove and the right gate groove by controlling the left gate winch and the right gate winch.
5. The navigable river super-span moisture-proof gate according to claim 4, wherein left and right arc-shaped guide blocks are provided on the outer side surfaces of the left and right side portions of the buoyancy tank type moisture-proof gate body, and the left and right arc-shaped guide blocks are used for guiding the left and right side portions of the buoyancy tank type moisture-proof gate body into the left and right gate grooves.
6. The navigable river super-large span tidal gate of claim 5, wherein the tidal side corners of the left and right gate slots are rounded.
7. The navigable river super-large span tide gate according to claim 1, wherein the tide blocking side inner side surface and the non-tide blocking side inner side surface of the left gate slot are symmetrically provided with a first left positioning groove and a second left positioning groove which extend along the vertical direction, and the tide blocking side inner side surface and the non-tide blocking side inner side surface of the right gate slot are symmetrically provided with a first right positioning groove and a second right positioning groove which extend along the vertical direction; work as left and right side portion of the buoyancy tank formula fender tide gate body inserts back left and right door inslot first, the left locating plug of second of embedding in the left locating groove of first, second, through first, the left locating plug of second is right the left side portion of the buoyancy tank formula fender tide gate body advances line location first, the right locating plug of second of embedding in the right locating groove of first, second, through first, the right locating plug of second is right the right side portion of the buoyancy tank formula fender tide gate body advances line location.
8. The navigable river super-span moisture-blocking gate according to claim 7, wherein when in a non-moisture-blocking period, a left access door is arranged in the left door groove, two side portions of the left access door are respectively embedded in the first and second left positioning grooves, the left door groove can be subjected to dry operation or maintenance by draining the water in the left door groove, a right access door is arranged in the right door groove, two side portions of the right access door are respectively embedded in the first and second right positioning grooves, and the right door groove can be subjected to dry operation or maintenance by draining the water in the right door groove.
9. The navigable river super-large span tidal gate according to claim 8, wherein the left access door is composed of a plurality of left pontoon beams which are sequentially stacked from bottom to top, and the right access door is composed of a plurality of right pontoon beams which are sequentially stacked from bottom to top.
10. The navigable river super-span tidal gate according to claim 7, wherein a left water-stop rubber sealing strip is disposed on one side of the second left positioning groove on the non-tidal-side inner side surface of the left gate chute, and a right water-stop rubber sealing strip is disposed on one side of the second right positioning groove on the non-tidal-side inner side surface of the right gate chute.
11. The navigable river super-span moisture barrier gate according to claim 10, wherein a plurality of bottom water stop structures are provided at intervals along the water flow direction on the bottom surface of the buoyancy tank type moisture barrier gate body.
12. The navigable river super-span tidal gate of claim 11, wherein the bottom water stop structure is a replaceable high pressure bladder or rubber water stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220742830.1U CN217781919U (en) | 2022-03-31 | 2022-03-31 | Navigation river course super large span keeps off tide gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220742830.1U CN217781919U (en) | 2022-03-31 | 2022-03-31 | Navigation river course super large span keeps off tide gate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217781919U true CN217781919U (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220742830.1U Active CN217781919U (en) | 2022-03-31 | 2022-03-31 | Navigation river course super large span keeps off tide gate |
Country Status (1)
| Country | Link |
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| CN (1) | CN217781919U (en) |
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- 2022-03-31 CN CN202220742830.1U patent/CN217781919U/en active Active
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