CN219011224U - Stone throwing leveling device - Google Patents
Stone throwing leveling device Download PDFInfo
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- CN219011224U CN219011224U CN202223481220.XU CN202223481220U CN219011224U CN 219011224 U CN219011224 U CN 219011224U CN 202223481220 U CN202223481220 U CN 202223481220U CN 219011224 U CN219011224 U CN 219011224U
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Abstract
The utility model relates to a rubble leveling device, which belongs to the field of underwater construction, and comprises: the device comprises a loading platform, a distributing mechanism and a leveling mechanism, wherein the loading platform is used for being installed on a ship; the material distribution mechanism is arranged on the loading platform and comprises a first moving assembly, a hopper and a material conveying pipe, wherein the material conveying pipe is connected and communicated with the output end of the hopper, and the first moving assembly is used for driving the hopper and the material conveying pipe to horizontally move along a first direction; the leveling mechanism is arranged on the loading platform and comprises a longitudinal moving assembly, a second moving assembly and a scraper, wherein the longitudinal moving assembly is used for driving the second moving assembly to vertically move, and the second moving assembly is used for driving the scraper to horizontally move along a first direction. Placing the crushed stone in the hopper and paving the crushed stone on the water bottom through the conveying pipe, and adjusting the paving position of the crushed stone through the first moving assembly. The longitudinal moving assembly is used for driving the scraper to be close to broken stone at the water bottom, and the scraper is moved to scrape the broken stone through the second moving assembly.
Description
Technical Field
The utility model belongs to the technical field of underwater construction, and particularly relates to a rubble leveling device.
Background
Leveling of underwater riprap beds is a very important link in hydraulic engineering. The stone throwing foundation bed is a foundation bed filled with stone blocks, so that the top standard height of the foundation bed meets the design requirement, the upper prefabricated part is convenient to stably install, the top surface of the foundation bed is required to be fine flat or extremely fine flat according to the design requirement, and the leveling precision of the stone throwing foundation bed directly influences the final forming precision of the prefabricated part implantation.
The traditional underwater riprap foundation leveling process is usually completed by arranging underwater leveling rails, transporting the block stones, the two stones and the large-grain broken stone to a construction site through a ship, and commanding a riprap worker to throw materials into the foundation by a diver. The diver pushes the scraper under water to level and fill up the gap under the scraper, and redundant stones are hung on the ship by using a hanging basket, and the defect is supplemented by feeding materials on the ship. Because the engineering environment faces natural conditions of water depth and wave, the underwater construction of divers is difficult and the efficiency is reduced.
Disclosure of Invention
Aiming at the defects existing in the related art, the utility model provides the stone throwing leveling device, stone is paved through the distributing mechanism, and is leveled through the leveling mechanism, so that automatic leveling is realized, underwater construction of divers is not needed, and the technical problem of low efficiency existing in the prior art is solved.
The utility model provides a rubble leveling device, comprising:
the loading platform is used for being mounted on a ship;
the material distribution mechanism is arranged on the loading platform and comprises a first moving assembly, a hopper and a material conveying pipe, wherein the material conveying pipe is connected and communicated with the output end of the hopper, and the first moving assembly is used for driving the hopper and the material conveying pipe to horizontally move along a first direction;
the leveling mechanism is arranged on the loading platform and comprises a longitudinal moving assembly, a second moving assembly and a scraper, wherein the longitudinal moving assembly is used for driving the second moving assembly to vertically move, and the second moving assembly is used for driving the scraper to horizontally move along a first direction.
In the technical scheme, the broken stone is placed in the hopper and paved on the water bottom through the conveying pipe, and the position of the broken stone pavement is adjusted through the first moving assembly. The longitudinal moving assembly is used for driving the scraper to be close to broken stone at the water bottom, and the scraper is moved through the second moving assembly so as to realize scraping of the broken stone. The automatic stone spreading and leveling device can automatically run through equipment, does not need divers to drain water, and improves construction efficiency.
In some embodiments, the leveling mechanism further comprises two vertically arranged measuring towers and an underwater leveling frame, wherein the two measuring towers are arranged at intervals along a first direction, and the underwater leveling frame is arranged at the bottom ends of the two measuring towers; the underwater leveling frame is vertically penetrated with a moving groove, and the scraper is connected with the underwater leveling frame and slides in the moving groove.
In the technical scheme, the underwater leveling frame is used for installing the scraper, and the position range of the scraper is conveniently and manually known according to the measuring tower. And the stability of the ascending and descending of the underwater leveling frame is ensured through the measuring tower.
In some embodiments, the longitudinal movement assembly includes a second hoisting device disposed on the loading platform, and a pull wire of the second hoisting device is connected to the underwater leveling frame.
In the technical scheme, the second winding equipment is wound or unwound. And the lifting of the underwater leveling frame is realized through the guiding of the measuring tower, and the lifting of the scraper is realized.
In some embodiments, the second moving assembly includes a third hoisting device disposed on the loading platform and respectively located at two sides of the scraper, and a pull wire of the third hoisting device is connected to the scraper.
In the technical scheme, winding equipment on one side of the scraper is unreeled, and winding equipment on the other side of the scraper is wound to pull the scraper to move in a moving groove of the device platform, so that the scraper can be leveled on the water bottom.
In some embodiments, the underwater leveling frame is a rectangular frame, and the corners of the underwater leveling frame are provided with pile shoes.
In the technical scheme, the pile shoe is used for supporting the ground so as to stabilize the underwater leveling frame and improve the effect of the scraper in leveling broken stones.
In some embodiments, the corners of the underwater leveling frame are provided with oil cylinders, the output shafts of the oil cylinders are vertically downward, and the pile shoes are connected with the corresponding output shafts of the oil cylinders.
In the technical scheme, the pile shoe is pushed by the oil cylinder, the distance between the underwater leveling frame and the scraper and the water bottom is changed, the leveling height is changed according to the requirements, and the operation is convenient.
In some of these embodiments, a satellite positioning assembly is mounted on top of the measurement tower.
In the technical scheme, the satellite positioning assembly is used for further improving the positioning of the scraper, improving the integrity and continuity of leveling the submarine crushed stones and improving the leveling effect.
In some embodiments, the first moving assembly includes a sliding rail, a material distribution bracket and a first hoisting device, the sliding rail is disposed on the loading platform and extends along the first direction, the material distribution bracket is slidably connected to the sliding rail, the hopper is mounted on the material distribution bracket, the first hoisting devices are respectively disposed at two ends of the sliding rail, and a pull wire of the first hoisting device is connected with the material distribution bracket.
In the technical scheme, the material distributing bracket is pulled by the first winding equipment to pull the hopper and the material conveying pipe, so that the position of the material to be scattered is changed, the uniformity of the material to be scattered is improved, and the effect of subsequent leveling is improved.
In some embodiments, the feed delivery pipe is formed by a plurality of serial connection, and a plurality of water permeable holes are penetrated through the serial peripheral wall.
In the technical scheme, a plurality of serial pipes form the conveying pipe, so that the manual installation is convenient. And the resistance to the conveying pipe during movement is reduced through the water permeable holes, so that the bending deformation of the conveying pipe is avoided, and the structural stability is improved.
In some of these embodiments, both sides of the front and both sides of the rear of the vessel are provided with anchor lines.
In the technical scheme, the hull can be stabilized through a plurality of anchor cables, and the plurality of anchor cables are mutually matched, so that the positions of the ship and the loading platform can be accurately changed.
Based on the technical scheme, in the embodiment of the utility model, the crushed stone is placed in the hopper and laid on the water bottom through the conveying pipe, and the position where the crushed stone is laid is adjusted through the first moving assembly. The longitudinal moving assembly is used for driving the scraper to be close to broken stone at the water bottom, and the scraper is moved through the second moving assembly so as to realize scraping of the broken stone. The automatic stone spreading and leveling device can automatically run through equipment, does not need divers to drain water, and improves construction efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic view showing the overall structure of an embodiment of the riprap leveling device of the present utility model;
FIG. 2 is a top view of one embodiment of the riprap screed of the present utility model;
FIG. 3 is a top view of a portion of a subsurface screed box in one embodiment of the riprap screed of the present utility model;
FIG. 4 is a cross-sectional view of a portion of a subsurface screed box in one embodiment of the riprap screed of the present utility model;
fig. 5 is a schematic view of a middle hopper portion of an embodiment of the riprap screed of the present utility model.
In the figure:
100. a vessel; 200. loading a platform; 300. an anchor cable; 400. a first moving assembly; 401. a slide rail; 402. a cloth bracket; 403. a first hoisting device; 500. a hopper; 600. a material conveying pipe; 700. a second hoisting device; 800. a measuring tower; 900. an underwater leveling frame; 110. a scraper; 120. a third hoisting device; 130. an oil cylinder; 140. pile shoe.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or a third "may explicitly or implicitly include one or more such feature.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In one exemplary embodiment of the riprap screed of the present utility model, as shown in fig. 1-5, the riprap screed comprises: loading platform 200, distributing mechanism, leveling mechanism, wherein loading platform 200 is used for being installed on ship 100; the material distributing mechanism is arranged on the loading platform 200, and comprises a first moving assembly 400, a hopper 500 and a material conveying pipe 600, wherein the material conveying pipe 600 is connected and communicated with the output end of the hopper 500, and the first moving assembly 400 is used for driving the hopper 500 and the material conveying pipe 600 to horizontally move along a first direction; the leveling mechanism is disposed on the loading platform 200, and the leveling mechanism includes a longitudinal moving component, a second moving component and a scraper 110, wherein the longitudinal moving component is used for driving the second moving component to vertically move, and the second moving component is used for driving the scraper 110 to horizontally move along the first direction. The crushed stone is placed in the hopper 500 and is laid on the water bottom through the feed pipe 600, and the position where the crushed stone is laid is adjusted by the first moving assembly 400. The longitudinal moving component is used for driving the scraper 110 to be close to the broken stone at the water bottom, and the scraper 110 is moved by the second moving component so as to realize the scraping of the broken stone. The automatic stone spreading and leveling device can automatically run through equipment, does not need divers to drain water, and improves construction efficiency.
In an embodiment, the loading platform 200 has two loading platforms and is respectively disposed at two sides of the ship 100, and the distributing mechanism and the leveling mechanism are respectively disposed on the two loading platforms 200, so as to ensure that the weights at two sides of the ship 100 are similar, and improve the stability of the ship 100.
In one embodiment, both sides of the front and both sides of the rear of the vessel 100 are provided with anchor lines 300. The hull can be stabilized by the plurality of anchor lines 300, and the positions of the vessel 100 and the loading platform 200 can be precisely changed by the plurality of anchor lines 300 being engaged with each other.
Specifically, anchor line 300 includes a reeled anchor, a chain, and a vessel anchor. And throwing the splayed anchor during construction. I.e. four anchor lines extending in four directions horizontally of the vessel 100. And the cloth mechanism is positioned at one side of the second direction of the leveling mechanism in a horizontal second direction, and the second direction is perpendicular to the first direction. Two anchor lines 300 close to the distributing mechanism are arranged as first anchor lines 300, and two anchor lines 300 close to the leveling mechanism are arranged as second anchor lines 300. When all the anchor chains are tightened, the ship body is stable, and leveling operation can be performed. When the second moving assembly drives the scraper 110 to level the seabed, the longitudinal moving assembly drives the scraper 110 to ascend away from the seabed. The two second anchor lines 300 are unreeled, and the two first anchor lines 300 are reeled up to drive the ship 100 and the loading platform 200 to move along the second direction, the scraper 110 is lowered again, and the second moving assembly drives the scraper 110 to level the new underwater region. Meanwhile, the distributing mechanism conveys stones to the seabed through the hopper 500 and the conveying pipe 600, and the first moving assembly 400 drives the hopper 500 and the conveying pipe 600 to move along the first direction, so that stones are uniformly spread. The moving distance of the loading platform 200, the ship 100, the distributing mechanism and the leveling mechanism can be accurately controlled through the anchor cables 300 in the scheme, so that the leveling mechanism can level the water bottom regularly in sequence, and the leveling effect is improved.
As shown in fig. 1 to 5, in an embodiment, the leveling mechanism further includes two vertically disposed measuring towers 800 and an underwater leveling frame 900, where the two measuring towers 800 are disposed at intervals along the first direction, and the underwater leveling frame 900 is disposed at the bottom ends of the two measuring towers 800; the underwater leveling frame 900 is vertically penetrated with a moving groove, and the scraper 110 is connected to the underwater leveling frame 900 and slides in the moving groove. The underwater leveling frame 900 is used to install the doctor blade 110, and the range of the position of the doctor blade 110 is easily known manually from the measuring tower 800. And the stability of the ascent and descent of the underwater leveling frame 900 is ensured by the measuring tower 800.
Specifically, the underwater leveling frame 900 is a rectangular frame, and the underwater leveling frame 900 is horizontally disposed and the length direction extends in the first direction. The moving groove is rectangular, and the length direction is set along the first direction. The scraper 110 is a vertically arranged rectangle, and the length direction of the scraper 110 is along the second direction.
In one embodiment, the loading platform 200 is provided with a first moon pool through which the measuring tower 800 passes.
In other embodiments, a cover plate is provided on top of the scraper 110, the length of the cover plate is greater than that of the scraper 110, and two ends of the cover plate in the length direction are disposed on the upper surface of the underwater leveling frame 900 and slidably connected to the underwater leveling frame 900. The scraper 110 is supported by a cover plate.
Specifically, the inner wall of the moving groove is provided with a vertical limit roller and a horizontal limit roller to limit the scraper 110.
As shown in fig. 1 to 5, in an embodiment, the longitudinal moving assembly includes a second winding apparatus 700, the second winding apparatus 700 is disposed on the loading platform 200, and a wire of the second winding apparatus 700 is connected to the underwater leveling frame 900. By winding or unwinding the second winding device 700. And the lifting of the underwater leveling frame 900 and the lifting of the scraper 110 are realized through the guiding of the measuring tower 800.
Specifically, two second hoisting devices 700 are provided, the pull wires of the two second hoisting devices 700 are connected with two sides of the underwater leveling frame 900, and the two second hoisting devices 700 work synchronously, so that stability of the underwater leveling frame 900 during lifting is improved.
In an embodiment, the second moving assembly includes a third winding device 120, the third winding device 120 is disposed on the loading platform 200 and located on two sides of the scraper 110, and a pull wire of the third winding device 120 is connected to the scraper 110. The winding equipment on one side of the scraper 110 is unreeled, and the winding equipment on the other side is wound to pull the scraper 110 to move in a moving groove of the device platform, so that the scraper 110 can level the water bottom.
Specifically, two third hoisting devices 120 are provided, and the two third hoisting devices 120 are respectively disposed at two ends of the upper surface of the underwater leveling frame 900, that is, at two sides of the scraper 110. The pull wires of the two third winding devices 120 are respectively connected to the middle parts of the two sides of the scraper 110, so as to improve the moving stability of the scraper 110 when the scraper 110 is pulled.
As shown in fig. 1 to 5, in one embodiment, the pile shoe 140 is provided at each corner of the underwater leveling frame 900. The ground is supported by the shoe 140 to stabilize the underwater leveling frame 900, and the effect of leveling crushed stone by the scraper 110 is improved.
In an embodiment, the corners of the underwater leveling frame 900 are provided with the oil cylinders 130, the output shafts of the oil cylinders 130 are vertically downward, and the pile shoes 140 are connected to the output shafts of the corresponding oil cylinders 130. The pile shoe 140 is pushed by the oil cylinder 130, the distance between the underwater leveling frame 900 and the scraper 110 and the water bottom is changed, the leveling height is changed according to the requirement, and the operation is convenient.
Specifically, the outer portion of the oil cylinder 130 is sleeved with a sealing shell, and the corresponding corner of the underwater leveling frame 900 is connected with the sealing shell. The sealing shell prevents the cylinder 130 from being inoperable due to water inflow.
In one embodiment, a satellite positioning assembly is mounted on top of the measurement tower 800. The positioning of the scraper 110 is further improved through the satellite positioning assembly, the integrity and the continuity of leveling the submarine crushed stones are improved, and the leveling effect is improved.
Specifically, satellite positioning assemblies are mounted on top of both measurement towers 800 to increase structural strength. The satellite positioning component is preferably GPS. In other embodiments the satellite positioning assembly is Beidou.
As shown in fig. 1 to 5, in one embodiment, the measuring tower 800 is composed of steel bars, and the cross section of the measuring tower 800 forms a triangular structure. The triangular configuration increases the strength of the measurement tower 800. The bottom of the measuring tower 800 is connected to the underwater leveling frame 900 by a flange.
As shown in fig. 1 to 5, in an embodiment, the first moving assembly 400 includes a sliding rail 401, a material distribution bracket 402 and a first winding device 403, the sliding rail 401 is disposed on the loading platform 200 and extends along a first direction, the material distribution bracket 402 is slidably connected to the sliding rail 401, the hopper 500 is mounted on the material distribution bracket 402, the first winding devices 403 are respectively disposed at two ends of the sliding rail 401, and a pull wire of the first winding device 403 is connected to the material distribution bracket 402. The material distributing bracket 402 is pulled by the first winding equipment 403 to pull the hopper 500 and the material conveying pipe 600, so that the material scattering position is changed, the uniformity of the scattered material is improved, and the subsequent leveling effect is improved.
Specifically, the loading platform 200 is further provided with a second moon pool. The sliding rails 401 are arranged in two along the second direction at intervals, and the second moon pool is arranged between the two second sliding rails 401. The two sides of the cloth support 402 slide along with the two second slide rails 401, and the first winding device 403 is provided with two second winding devices and is respectively arranged at two sides of the cloth support 402 in the first direction. One of the first winding devices 403 unwinds and the other first winding device 403 winds to pull the cloth support 402 to slide on the slide rail 401.
As shown in fig. 1 to 5, in an embodiment, the material distributing bracket 402 is a rectangular frame, the hopper 500 is connected inside the material distributing bracket 402, the top of the hopper 500 is a material inlet, the bottom of the hopper 500 is a material outlet, and the area of the material inlet is larger than that of the material outlet.
In another embodiment, four first hoisting devices 403 are provided, and two ends of each first sliding rail 401 are provided with the first hoisting devices 403, so as to increase the speed of pulling the hopper 500 and the conveying pipe 600.
Further, the cloth bracket 402 is connected with the sliding rail 401 through rollers, static friction is changed into rolling friction, and moving stability is improved.
In one embodiment, the delivery conduit 600 is formed by a plurality of series connections, with a series of water permeable holes extending through the peripheral wall. The plurality of serially connected conveying pipes 600 are formed, so that manual installation is facilitated. And the resistance to the conveying pipe 600 during movement is reduced through the water permeable holes, so that the bending deformation of the conveying pipe 600 is avoided, and the structural stability is improved.
Specifically, the plurality of serial passages are connected through flanges.
In the present utility model, the first, second and third winding apparatuses 403, 700 and 120 include, but are not limited to, windlass.
By way of illustration of various embodiments of the inventive riprap screed embodiments of the present utility model, it may be seen that the inventive riprap screed embodiments provide at least one or more of the following advantages:
1. the crushed stone is placed in the hopper 500 and is laid on the water bottom through the feed pipe 600, and the position where the crushed stone is laid is adjusted by the first moving assembly 400. The longitudinal moving component is used for driving the scraper 110 to be close to the broken stone at the water bottom, and the scraper 110 is moved by the second moving component so as to realize the scraping of the broken stone. The stone spreading and leveling are realized through the automatic running of the equipment, the diver is not required to drain water, and the construction efficiency is improved;
2. the moving distance of the loading platform 200, the ship 100, the distributing mechanism and the leveling mechanism can be accurately controlled through the anchor cables 300, so that the leveling mechanism can level the water bottom regularly in sequence, and the leveling effect is improved.
Finally, it should be noted that: in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (10)
1. A riprap leveling device, comprising:
the loading platform is used for being mounted on a ship;
the material distribution mechanism is arranged on the loading platform and comprises a first moving assembly, a hopper and a material conveying pipe, wherein the material conveying pipe is connected and communicated with the output end of the hopper, and the first moving assembly is used for driving the hopper and the material conveying pipe to horizontally move along a first direction;
the leveling mechanism is arranged on the loading platform and comprises a longitudinal moving assembly, a second moving assembly and a scraper, wherein the longitudinal moving assembly is used for driving the second moving assembly to vertically move, and the second moving assembly is used for driving the scraper to horizontally move along a first direction.
2. The riprap leveling device according to claim 1, wherein the leveling mechanism further comprises two vertically arranged measuring towers and an underwater leveling frame, the two measuring towers being arranged at intervals along a first direction, the underwater leveling frame being arranged at bottom ends of the two measuring towers; the underwater leveling frame is vertically penetrated with a moving groove, and the scraper is connected with the underwater leveling frame and slides in the moving groove.
3. The riprap leveling device of claim 2, wherein the longitudinal movement assembly includes a second hoisting apparatus disposed on the loading platform, a pull wire of the second hoisting apparatus being connected to the underwater leveling frame.
4. The riprap leveling device of claim 2, wherein the second moving assembly comprises a third hoisting device disposed on the loading platform and respectively located at two sides of the scraper, and a pull wire of the third hoisting device is connected to the scraper.
5. The riprap leveling device of claim 2, wherein the underwater leveling frame is a rectangular frame, and piles are provided at corners of the underwater leveling frame.
6. The riprap leveling device according to claim 5, wherein oil cylinders are provided at corners of the underwater leveling frame, output shafts of the oil cylinders are vertically downward, and the pile shoes are connected to the output shafts of the corresponding oil cylinders.
7. A rubble levelling device according to claim 2 in which a satellite positioning assembly is mounted on top of the measuring tower.
8. The riprap leveling device according to any one of claims 1-7, wherein the first moving assembly comprises a slide rail, a cloth support and a first hoisting device, the slide rail is arranged on the loading platform and extends along the first direction, the cloth support is slidably connected to the slide rail, the hopper is mounted on the cloth support, the first hoisting devices are respectively arranged at two ends of the slide rail, and a pull wire of the first hoisting device is connected with the cloth support.
9. A rubble levelling device according to any one of claims 1 to 7 in which the feed conduit is formed by a plurality of series connections, the series having a peripheral wall through which a plurality of water permeable apertures extend.
10. A rubble levelling device according to any of claims 1 to 7 in which anchor lines are provided on both sides of the front and rear of the vessel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223481220.XU CN219011224U (en) | 2022-12-26 | 2022-12-26 | Stone throwing leveling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223481220.XU CN219011224U (en) | 2022-12-26 | 2022-12-26 | Stone throwing leveling device |
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| CN219011224U true CN219011224U (en) | 2023-05-12 |
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| CN202223481220.XU Active CN219011224U (en) | 2022-12-26 | 2022-12-26 | Stone throwing leveling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117306536A (en) * | 2023-11-29 | 2023-12-29 | 中铁四局集团第二工程有限公司 | Stone throwing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117306536A (en) * | 2023-11-29 | 2023-12-29 | 中铁四局集团第二工程有限公司 | Stone throwing system |
| CN117306536B (en) * | 2023-11-29 | 2024-03-15 | 中铁四局集团有限公司 | Stone throwing system |
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