CN216627127U - Pile type lifting net cage - Google Patents
Pile type lifting net cage Download PDFInfo
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- CN216627127U CN216627127U CN202123125334.6U CN202123125334U CN216627127U CN 216627127 U CN216627127 U CN 216627127U CN 202123125334 U CN202123125334 U CN 202123125334U CN 216627127 U CN216627127 U CN 216627127U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
Abstract
The utility model discloses a pile type lifting net cage, which comprises a net and piles, wherein the piles are arranged at four corners of the net, the net comprises a net cover, a net bottom and a net wall, sliding rings are fixedly arranged on side strips of the net wall, each of the four piles is provided with a guide pillar, the sliding rings are slidably sleeved outside the guide pillars, a plurality of anchor blocks are arranged on four side edges of the net bottom, a first winding machine and a second winding machine are arranged on the top surfaces of the four piles, a plurality of lower pull ropes are arranged on the lower side strips, first ends of the lower pull ropes are fixed on the lower side strips, rope passing wheels are arranged on the anchor blocks, second ends of the lower pull ropes pass the rope passing wheels and are fixed on the first winding machine, upper pull ropes are arranged on four upper side edges of the net cover, first ends of the upper pull ropes are fixed with the upper side edges of the net cover, and second ends of the upper pull ropes are fixed on the second winding machine. Compared with the prior art, the height of the netting can be adjusted according to different water areas and requirements, so that the netting is convenient for culture personnel to replace or lift and collect, and the netting is convenient to clean, check safely and capture fishes.
Description
Technical Field
The utility model relates to a pile type net cage, in particular to a pile type lifting net cage.
Background
Mariculture is one of the main industries of aquaculture in China, and the aquaculture industry, particularly mariculture, provides important food, high-quality protein and life sources for human beings. However, with the rapid development of the marine aquaculture industry, various problems are brought, such as aquaculture water pollution, fish diseases, and the quality safety of aquaculture aquatic products, so that the improvement and recovery of the ecological environment of marine aquaculture, the improvement of the quality of aquaculture aquatic products, and the like become problems to be solved urgently in the marine aquaculture industry and even the whole aquaculture industry. Under the background, large-scale pile-column fence cultivation is invested. The pre-research and application of the stake-type fence cultivation in China starts around 2000 years, and with the development of modern science and technology, the research and development and application of new material technologies such as ultra-high molecular weight polyethylene and special metal alloy, new fishery equipment and ocean engineering, new design and assembly technology of large-scale cultivation netting gear and the like, and the improvement of comprehensive strength of cultivation enterprises, the large-scale, engineering, offshore and modernization of fence cultivation facilities are possible.
The existing pile-column fence cultivation uses concrete or steel pipe piles buried in seabed to a certain depth as stress supports, uses a copper alloy net coat (called copper net coat for short) and an ultra-high molecular weight polyethylene net coat (called ultra-high strength ethylene net for short) to enclose a selected specific sea area into a closed water body and puts artificially bred fish fries into the closed water body for cultivation production, is used for cultivating fishes such as large yellow croaker, grouper, black porgy, porgy and the like or fish-shellfish-algae mixed cultivation, has the advantages of strong typhoon resistance, large cultivation water body, closer to nature cultivation environment, excellent and more ecological cultivation product quality, less cultivation diseases, small environmental pollution risk, convenient management and operation, low unit water body investment, capability of being combined with leisure fishery and the like, obtains the approval of aquatic product market and consumer groups, and has greater development potential, the method is suitable for being built in open or semi-open sea areas around the island reef of the gulf and carrying out large-area cultivation. However, the netting of the pile-type fence is fixed on the seabed by adopting a mode that the net wall is directly buried into the seabed for a certain distance without a net cover and a net bottom, and cannot be lifted, so that the netting in a water area under low tide cannot be changed or taken up for removing fouling organisms and carrying out safety inspection on the netting after being soaked in seawater for a long time.
Accordingly, the present inventors have conducted extensive studies on a pile fence, and have developed the present invention.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pile type lifting type net cage which can lift the height of a net cover of the net cage according to different water layers and culture requirements and is convenient for changing a net and cleaning the net cover.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a pile type lifting net cage comprises a net and piles, wherein the net is of a hollow square structure, piles are arranged at four corners of the net, the net is of a box structure consisting of a net cover, a net bottom and a net wall, four side edges of the net cover are in one-to-one correspondence disassembly connection with four upper side edges of the net wall, side edge strips extending along the vertical direction are arranged at four corners of the net wall, a plurality of sliding rings arranged at intervals up and down are fixedly arranged on the side edge strips, a guide pillar is disassembled and installed on one surface of each of the four piles facing the center of the net, the sliding rings on the same side are sleeved outside the guide pillar on the same side as the side edge strips in a sliding mode, the four side edges of the net bottom are fixedly connected with the four lower side edges of the net wall, the four side edges of the net bottom are provided with lower strips extending along the side edges of the net bottom, each lower edge strip is provided with a plurality of anchor blocks distributed at intervals along the length direction of the lower edge strips, the top surfaces of the four piles are all provided with a first winch and a second winch, the output shafts of the four first winches are all provided with a first rotating shaft extending along the side edge of the net cover, the output shafts of the four second winches are all provided with a second rotating shaft extending along the side edge of the net cover, the four first rotating shafts enclose a square space matched with the net cover, the four second rotating shafts correspondingly enclose a square space matched with the net cover, the lower edge strip is provided with a plurality of lower pull ropes, the lower pull ropes and the anchor blocks on the lower edge strip are arranged in a one-to-one correspondence manner, the first ends of the lower pull ropes are fixed on the lower edge strip, the anchor blocks are provided with rope passing wheels, the second ends of the lower pull ropes pass through the rope wheels and extend upwards to the outside of the first rotating shafts, the second ends of the lower pull ropes at the positions of the first rotating shafts are fixed on the first rotating shafts, the four upper side edges of the net cover are provided with upper pull ropes, and the first ends of the upper pull ropes are fixed on the upper side edge of the net cover, the second end of the upper pull rope is fixed on the second rotating shaft.
The anchor block is a reinforced concrete block.
The upper portion and the lower extreme of above-mentioned stake all weld firmly relative installation piece from top to bottom, and above-mentioned guide pillar is in between two installation pieces and is in the same place with the installation piece lock solid, and the protruding connecting strip that extends to the stake direction that is equipped with on the middle part inside wall of above-mentioned guide pillar, above-mentioned connecting strip and above-mentioned stake fit together, and above-mentioned sliding ring is corresponding to the connecting strip department of guide pillar and is seted up and run through from top to bottom and with connecting strip assorted fracture.
In the four piles, a transverse connecting frame is connected between every two adjacent pile top surfaces, the first winch is installed on the top surface of the first end of the transverse connecting frame, the second winch is installed on the top surface of the second end of the transverse connecting frame, the first rotating shaft and the second rotating shaft extend relatively, and the first rotating shaft is located on the outer side of the second rotating shaft.
The upper pull ropes are provided with a plurality of pieces, and the upper pull ropes on the same side are arranged at intervals along the length direction of the upper side edge of the net cover.
The pile column is provided with a vertical column body which is vertically arranged and an inclined column body which is obliquely arranged, the inclined column body is positioned on one side of the vertical column body and is arranged at an acute included angle, and the top surfaces of the vertical column body and the inclined column body are jointly fixed below the bottom surface of the transverse connecting frame.
The lower pull rope is provided with a downward inclined section and an upward inclined section, the upper end of the downward inclined section is fixed with the lower edge strip of the net bottom, the upper end of the upward inclined section is fixedly matched with the first rotating shaft, the periphery of the anchor block is provided with a plurality of convex lugs which are distributed at intervals in the circumferential direction of the anchor block and are outwards convex, and the rope passing wheel is rotatably arranged on one convex lug.
When the pile type lifting net cage is applied, the whole net cage can be fixedly placed in the sea by the aid of the anchor blocks externally arranged on the four side edges of the net bottom, the net is tensioned by the aid of the upper pull ropes and the lower pull ropes, stress of a whole net wall under the action of ocean currents can be transmitted to the anchor blocks through the lower pull ropes, accordingly, loads on piles generated by the net cage due to resistance of ocean currents are reduced, the lower pull ropes are uncoiled by the aid of the first winch, the upper pull ropes are coiled by the aid of the second winch, the whole net cage is lifted upwards on the guide posts by the aid of pulling and loosening, the height of the net cage can be adjusted according to different water areas and culture requirements, the problem that the service life of a net cover is shortened due to the fact that parts of the net wall located in a low-tide water area are soaked in seawater for a long time is solved, replacement or collection of the net cover is facilitated for culture personnel, and cleaning of the net cover is facilitated, Safety inspection, fish capture and the like.
Drawings
For ease of illustration, the utility model is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic view of a top down configuration of the present invention;
fig. 2 is a schematic side view of the present invention.
In the figure:
1, netting-1; a pile-2; a sliding ring-3; a guide post-4; an anchor block-5; a first winch-61; a first rotating shaft-611; a second hoist-62; a second rotating shaft-621; a lower pull rope-71; and (4) pulling a rope-72.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.
The pile type lifting net cage comprises a net 1 and piles 2, wherein the net 1 is of a hollow square structure, the piles 2 are arranged at four corners of the net 1, namely the four piles 2 enclose a square area, and when the net is actually applied and the distance between the adjacent piles 2 at the four corners is far due to the large specification and size of the net, a plurality of piles can be additionally arranged between the adjacent piles 2 to enhance the integral supporting strength.
The netting 1 is a box structure consisting of a net cover, a net bottom and a net wall, namely the net cover and the net bottom are both square sheets, the net wall is a hollow square frame body which is enclosed by four side net sheets and has openings at the upper end and the lower end, the four side edges of the net cover are in one-to-one corresponding disassembly connection with the four upper side edges of the net wall, namely each side edge of the net cover is provided with an upper edge strip which extends along the side edge of the net cover, the upper edge strip is a weaving strip, the upper edge and the lower edge of the net wall are both sewed with a reinforced weaving strip, the upper edge strip is sewed or bound with the reinforced weaving strip positioned above, the four corners (namely four right angles of the net wall) of the net wall are both provided with side edge strips which extend along the up-down direction, the side edge strips can also be weaving strips, each side edge strip is fixedly provided with a plurality of sliding rings 3 which are arranged at intervals up and down, namely the side edge strips are sewed with closed annular bands, the sliding rings 3 are metal circular ring bodies which are sleeved outside the sliding rings 3, one surface of the four piles 2 facing the center of the netting is detachably provided with a guide post 4, each sliding ring 3 on the same side strip is sleeved outside the guide post 4 on the same side with the side strip in a sliding mode, preferably, the upper portion and the lower end of each pile 2 are fixedly welded with vertically opposite mounting blocks (not shown in the figure), the two mounting blocks are arranged on the inner side of the pile 2, the guide post 4 is arranged between the two mounting blocks and is locked with the mounting blocks through screws, the outer side wall of the middle portion of the guide post 4 is convexly provided with a connecting strip (not shown in the figure) extending towards the direction of the pile 2, the connecting strip is locked with the outer side wall of the pile 2, the sliding ring 3 is provided with a fracture which penetrates through the upper portion and the lower portion and is matched with the connecting strip corresponding to the connecting strip of the guide post, the vertical movement of each sliding ring 3 is not influenced by the connecting strip by the fracture of each sliding ring 3, and the whole guide post 4 is installed with the pile 2 in a three-point mode, the installation is comparatively firm.
Four sides at the bottom of the net and four lower side fixed connection of wall net are in the same place, and all be equipped with the lower border that extends along the side at the bottom of the net on the four sides at the bottom of the net, four borders at the bottom of the net are all sewed up the strip of weaving that extends along the length direction at border inherently promptly, this weave the strip do the lower border, each lower border is in four enhancement weaving strips of downside corresponding to the wall net and sews up admittedly or tie up admittedly together, each lower border all is equipped with a plurality of along the anchor block 5 of the even interval distribution of length direction of lower border towards outer certain distance's position, this anchor block 5 is reinforced concrete block.
The top surfaces of the four piles 2 are all provided with a first winch 61 and a second winch 62, the output shafts of the four sets of first winches 61 are all provided with a first rotating shaft 611 extending along the side edge of the net cover, the output shafts of the four sets of second winches 62 are all provided with a second rotating shaft 621 extending along the side edge of the net cover, the four first rotating shafts 611 surround to form a square space matched with the net cover, the four second rotating shafts 621 correspondingly surround to form a square space matched with the net cover, the lower edge is provided with a plurality of lower pull ropes 71, each lower pull rope 71 is arranged corresponding to each anchor block 5 on the outer side of the lower edge one by one, the first ends of the lower pull ropes 71 are fixed on the lower edge, each anchor block 5 is provided with a rope passing wheel (not shown in the figure), the second ends of the lower pull ropes 71 pass through the rope wheel and extend upwards to the outside of the first rotating shaft 611, the lower pull ropes 71 pass through the rope passing through the rope wheel, and after the anchor blocks are fixedly placed, the lower pull ropes 71 are tensioned, so that the whole net bottom is propped open, the second end of each lower pulling rope 71 at each first rotating shaft 611 is fixed on the first rotating shaft 611, the upper pulling rope 72 is arranged on the four upper side edges of the net cover, the first end of the upper pulling rope 72 is fixed with the upper side edge of the net cover, and the second end of the upper pulling rope 72 is fixed on the second rotating shaft 621.
Preferably, in four stakes 2, even be equipped with horizontal connection frame (not drawn in the picture) between two liang of adjacent stake top surfaces, horizontal connection frame is wide flat truss structure, first hoist engine 61 is installed on the first end top surface of horizontal connection frame, second hoist engine 62 is installed on the second end top surface of horizontal connection frame, first axis of rotation 611 and the setting of second axis of rotation 621 relative extension, and first axis of rotation 611 is in the outside of second axis of rotation 621, be in two stakes of front side promptly and be in the first hoist engine and the laying mode of second hoist engine on the horizontal connection frame of the two stakes of rear side are: the first winch 61 is positioned at the left side, the second winch 62 is positioned at the right side, the first rotating shaft 611 extends rightwards, the second rotating shaft 621 extends leftwards and is arranged in parallel, and the second rotating shaft is positioned at the inner side of the first rotating shaft; correspondingly, the first winch and the second winch on the transverse connecting frames of the two piles on the left side and the two piles on the right side are arranged in the following modes: the first winch is located on the front side, the second winch is located on the rear side, the first rotating shaft extends backwards, the second rotating shaft extends forwards and is arranged in parallel, the second rotating shaft is located on the inner side of the first rotating shaft, and a square space formed by the four second rotating shafts is located in a square space formed by the four first rotating shafts.
The utility model relates to a pile type lifting net cage, when in use, anchor blocks are positioned at the outer side of the net cage, the whole net cover 1 can be fixedly placed in the sea by utilizing the arrangement of the anchor blocks 5 at the four sides of the net bottom, the whole net cage is stretched by an upper pull rope and a lower pull rope to be in a tight state, meanwhile, the stress of the whole net wall under the action of ocean current can be transmitted to each anchor block 5 by the lower pull rope 71, thereby reducing the load of the net cage on a pile 2 caused by resisting the ocean current, furthermore, the first winch 61 unreels the lower pull rope 71, the second winch 62 rolls the upper pull rope 72, the whole net cage is lifted upwards on a guide post 4 by pulling and loosening, the height of the net cage can be adjusted according to different water areas and culture water areas, the problem that the service life of the net cover is shortened due to the long-term soaking of the part of the net wall below low tide in the seawater is avoided, and the replacement or the net cover lifting of culture personnel is convenient, the transverse connecting frame is convenient for managers to throw bait on the platform, observe the growth condition of fishes, catch the fishes and the like, and the transverse connecting frame has the advantages of strong typhoon resistance, excellent cultured product quality, small environmental pollution risk, convenient management operation, low unit water body investment, capability of being combined with leisure fishery and the like.
In the utility model, the upper pull ropes 72 are provided with a plurality of upper pull ropes 72, the upper pull ropes 72 on the same side are arranged at intervals along the length direction of the upper side edge of the net cover, and the net cover can have excellent tensioning effect by adopting a plurality of upper pull ropes 72.
In the utility model, the pile column 2 is provided with a vertical column body and an inclined column body which are vertically arranged, the inclined column body is arranged at one side of the vertical column body and forms an acute included angle, the top surfaces of the vertical column body and the inclined column body are jointly fixed below the bottom surface of the transverse connecting frame, the strength of the whole pile column can be enhanced through the additionally arranged inclined column body, the length of the net cage can be increased to 25 meters, the net cage with a large span is realized, and the construction cost is saved.
In the utility model, the lower pull rope 71 is provided with a downward inclined section and an upward inclined section, the upper end of the downward inclined section is fixed with the lower edge strip of the net bottom, the upper end of the upward inclined section is fixedly matched with the first rotating shaft 611, the periphery of the anchor block 5 is provided with a plurality of convex lugs which are distributed at intervals along the circumferential direction of the anchor block and are outwards protruded, the rope passing wheel is rotatably arranged on one convex lug, the net bottom of the net cage net coat 1 is in a good spreading state after seawater is placed by using the lower pull rope 71 with the structure, and the convex lugs are used for facilitating the installation of the rope passing wheel and facilitating the fixation of the anchor block in the seabed.
The utility model relates to an operation method of a pile type lifting net cage, which comprises net cage lifting operation and net cage descending operation, wherein the pile type lifting net cage comprises the following steps:
the net cage lifting operation comprises the following steps: the second winch 62 is started to wind the upper pull rope 72, and the first winch 61 is started to unwind the lower pull rope 71, so that the net cage netting 1 is lifted upwards on the guide post 4;
the net cage descending operation comprises the following steps: the second winch 62 is started to unreel the upper pull rope 72, and the first winch 61 is started to reel the lower pull rope 71, so that the net cage netting 1 descends downwards on the guide post 4.
The operation method of the pile type lifting net cage has the same effect as that of a pile type fence, the whole net cage can achieve the lifting effect by utilizing a pulling-loosening mode during operation, the net cage can lift different water layers in a space defined by four pile supporting points, and the operation mode is simple.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.
Claims (7)
1. The utility model provides a stake formula lift type box with a net, includes netting and stake, and the netting is the square structure of cavity, and the four corners of netting is equipped with stake, its characterized in that: the netting is a box structure consisting of a netting cover, a netting bottom and a netting wall, four side edges of the netting cover are detachably connected with four upper side edges of the netting wall in a one-to-one correspondence manner, side edge strips extending along the vertical direction are arranged at four corners of the netting wall, a plurality of slide rings arranged at intervals up and down are fixedly arranged on the side edge strips, a guide pillar is detachably arranged on one surface of each of four pile columns facing to the center of the netting, the slide rings on the same side edge strip are sleeved outside the guide pillar on the same side with the side edge strip in a sliding manner, the four side edges of the netting bottom are fixedly connected with the four lower side edges of the netting wall, lower side strips extending along the side edges of the netting bottom are arranged on the four side edges of the netting bottom, a plurality of anchor blocks uniformly distributed at intervals along the length direction of the lower edge strips are arranged on each lower edge strip, a first winch and a second winch are arranged on the top surfaces of the four pile columns, first rotating shafts of the four first winches are provided with first rotating shafts extending along the side edges of the netting cover, the output shaft of the four second winches is provided with a second rotating shaft extending along the side edge of the net cover, the four first rotating shafts are surrounded to form a square space matched with the net cover, the four second rotating shafts are correspondingly surrounded to form a square space matched with the net cover, the lower edge strip is provided with a plurality of lower pull ropes, the lower pull ropes and the anchor blocks on the lower edge strip are arranged in a one-to-one correspondence mode, the first ends of the lower pull ropes are fixed on the lower edge strip, the anchor blocks are provided with rope passing wheels, the second ends of the lower pull ropes pass through the rope wheels and extend upwards to the outside of the first rotating shafts, the second ends of the lower pull ropes at each first rotating shaft are fixed on the first rotating shafts, the four upper side edges of the net cover are provided with upper pull ropes, the first ends of the upper pull ropes are fixed with the upper side edge of the net cover, and the second ends of the upper pull ropes are fixed on the second rotating shafts.
2. The pile type lifting cage according to claim 1, characterized in that: the anchor block is a reinforced concrete block.
3. The pile type lifting cage according to claim 1, characterized in that: the upper portion and the lower extreme of above-mentioned stake all weld firmly relative installation piece from top to bottom, and above-mentioned guide pillar is in between two installation pieces and is in the same place with the installation piece lock solid, and the protruding connecting strip that extends to the stake direction that is equipped with on the middle part lateral wall of above-mentioned guide pillar, above-mentioned connecting strip and above-mentioned stake fit together, and above-mentioned sliding ring is corresponding to the connecting strip department of guide pillar and has seted up the fracture that runs through from top to bottom and with connecting strip assorted.
4. A pilar elevating cage according to any one of claims 1 to 3, wherein: in the four piles, a transverse connecting frame is connected between every two adjacent pile top surfaces, the first winch is installed on the top surface of the first end of the transverse connecting frame, the second winch is installed on the top surface of the second end of the transverse connecting frame, the first rotating shaft and the second rotating shaft extend relatively, and the first rotating shaft is located on the outer side of the second rotating shaft.
5. The pile type elevating cage according to claim 4, wherein: the upper pull ropes are provided with a plurality of pieces, and the upper pull ropes on the same side are arranged at intervals along the length direction of the upper side edge of the net cover.
6. The pile type elevating cage according to claim 4, wherein: the pile column is provided with a vertical column body which is vertically arranged and an inclined column body which is obliquely arranged, the inclined column body is positioned on one side of the vertical column body and is arranged at an acute included angle, and the top surfaces of the vertical column body and the inclined column body are jointly fixed below the bottom surface of the transverse connecting frame.
7. The pile type elevating cage according to claim 4, wherein: the lower pull rope is provided with a downward inclined section and an upward inclined section, the upper end of the downward inclined section is fixed with the lower edge strip of the net bottom, the upper end of the upward inclined section is fixedly matched with the first rotating shaft, the periphery of the anchor block is provided with a plurality of convex lugs which are distributed at intervals in the circumferential direction of the anchor block and are outwards convex, and the rope passing wheel is rotatably arranged on one convex lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123125334.6U CN216627127U (en) | 2021-12-13 | 2021-12-13 | Pile type lifting net cage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123125334.6U CN216627127U (en) | 2021-12-13 | 2021-12-13 | Pile type lifting net cage |
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| Publication Number | Publication Date |
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| CN216627127U true CN216627127U (en) | 2022-05-31 |
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| CN202123125334.6U Active CN216627127U (en) | 2021-12-13 | 2021-12-13 | Pile type lifting net cage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116439182A (en) * | 2023-04-19 | 2023-07-18 | 广东海洋大学 | Sliding fixing device for connecting lifting type net cage with steel pipe pile |
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2021
- 2021-12-13 CN CN202123125334.6U patent/CN216627127U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116439182A (en) * | 2023-04-19 | 2023-07-18 | 广东海洋大学 | Sliding fixing device for connecting lifting type net cage with steel pipe pile |
| CN116439182B (en) * | 2023-04-19 | 2023-11-03 | 广东海洋大学 | Sliding fixing device for connecting lifting type net cage with steel pipe pile |
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