CN219654632U - Drilling and jetting siphon drill bit for sand pumping ship and sand pumping ship - Google Patents
Drilling and jetting siphon drill bit for sand pumping ship and sand pumping ship Download PDFInfo
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- CN219654632U CN219654632U CN202320645397.4U CN202320645397U CN219654632U CN 219654632 U CN219654632 U CN 219654632U CN 202320645397 U CN202320645397 U CN 202320645397U CN 219654632 U CN219654632 U CN 219654632U
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- siphon
- drill bit
- drilling
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- 239000004576 sand Substances 0.000 title claims abstract description 62
- 238000005086 pumping Methods 0.000 title claims abstract description 54
- 238000005553 drilling Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 149
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 239000013049 sediment Substances 0.000 abstract description 18
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000000605 extraction Methods 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 46
- 230000000694 effects Effects 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 9
- 239000007921 spray Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000007667 floating Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model relates to the technical field of drill bits for sand pumping vessels, and provides a drill shooting siphon drill bit for sand pumping vessels and a sand pumping vessel, wherein the drill shooting siphon drill bit for sand pumping vessels comprises a drill cylinder, a drill rod is rotatably installed in the drill cylinder, one end of the drill rod extends to the outer side of the drill cylinder and is provided with the drill bit, a water injection mechanism is arranged at the outer side of the drill cylinder and at one end close to the drill bit, and a siphon component is arranged in an inner cavity of the drill cylinder and at the position close to the drill bit; the other end of the drill rod is provided with a driving motor which is positioned on the drill cylinder, and an output shaft of the driving motor is connected with the drill rod. The utility model penetrates into the sufficient sediment area at the bottom of the river bed in a drilling mode, and the sediment at the bottom of the river is extracted by spraying high-pressure water and a siphon pipeline, so that the sediment extraction efficiency is high, the yield is high, and the maintenance cost is low.
Description
Technical Field
The utility model relates to the technical field of drill bits for sand pumping vessels, in particular to a drill-jet siphon drill bit for a sand pumping vessel and the sand pumping vessel.
Background
The sand pumping ship can also be called as a sand pumping platform, and utilizes the action of water force to convey silt (or fine sand, sea sand and the like) flushed by a water column sprayed by a high-pressure water gun to a destination through a pipeline under the action of a water pump, has novel design, simple and convenient operation and high efficiency, is suitable for river channel dredging, lake reservoir dredging, sea-going field making, port and dock cleaning, yellow sand pumping, building sand and the like, and plays an important role.
The currently applied sand pumping ship is mainly a flushing sand pumping ship, which utilizes a high-pressure water pump to generate pressure water, and the high-pressure water gun is used for impacting sediment to form floating mud, and then the sediment is conveyed to an operation area through the sand pumping pump and a pipeline, however, as the sediment content on the surface of a river bed is gradually reduced in recent years for the mass exploitation of the sediment on the river bed, the mode of singly impacting the sediment on the river bed by the high-pressure water gun is difficult to meet the increasing demands; in addition, when the mud that forms after the high pressure impact is taken out by the sand pump, to the sand pumping efficiency of silt lower, simultaneously, long-term sand pumping work is also comparatively serious to the wearing and tearing of sand pump, and sand pump damage and maintenance frequency are high, lead to the maintenance cost to increase, influence sand pumping efficiency and the output of silt.
Therefore, the drilling and jetting siphon drill bit for the sand pumping boat and the sand pumping boat are developed, so that the drilling and jetting siphon drill bit not only has urgent research value, but also has good economic benefit and industrial application potential.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides the drilling siphon drill bit for the sand pumping boat and the sand pumping boat, which penetrate into a sufficient region of sediment at the bottom of a river bed in a drilling mode, realize the extraction of sediment at the bottom of the river by spraying high-pressure water and a siphon pipeline, and have the advantages of high sand pumping efficiency, high yield and low maintenance cost.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the drilling siphon drill bit for the sand pumping ship comprises a drill cylinder, wherein a drill rod is rotatably installed in the drill cylinder, one end of the drill rod extends to the outer side of the drill cylinder and is provided with a drill bit, one end, close to the drill bit, of the outer side of the drill cylinder is provided with a water jetting mechanism, and a siphon component is arranged in an inner cavity of the drill cylinder and close to the drill bit;
the other end of the drill rod is positioned on the drill cylinder and provided with a driving motor, and an output shaft of the driving motor is connected with the drill rod.
As an improved technical scheme, the water jet mechanism comprises a hollow water jacket, the water jacket is arranged on the outer side wall of the drill barrel, which is close to one end of the drill bit, a plurality of jet nozzles are arranged on the outer periphery of the water jacket, and a first water pipe is connected to the water jacket.
As an improved technical scheme, the first water conveying pipe is arranged in the inner cavity of the drill cylinder, one end of the first water conveying pipe penetrates through the side wall of the drill cylinder and is communicated with the water jacket, the other end of the first water conveying pipe is arranged along the side wall of the inner cavity of the drill cylinder and away from the drill bit, and the end part of the first water conveying pipe also penetrates through the side wall of the drill cylinder and is communicated with the first high-pressure input pipe.
As an improved technical scheme, the siphon assembly comprises a second water conveying pipe, the second water conveying pipe is arranged in a U-shaped structure in the inner cavity of the drill cylinder, the siphon is communicated with the U-shaped structure of the second water conveying pipe, one end of the siphon, which is far away from the second water conveying pipe, is close to the drill bit, two ends of the second water conveying pipe respectively penetrate through the side wall of the drill cylinder and extend to the outer side of the drill cylinder, and one end of the second water conveying pipe is communicated with a second high-pressure input pipe.
As an improved technical scheme, one section of the U-shaped structure of the second water conveying pipe, which is close to the second high-pressure input pipe, is a water inlet section, the other section is a water return section, the diameter of the water return section is larger than that of the water inlet section, and the siphon pipe is communicated with the water return section.
As an improved technical scheme, a support frame is arranged at the end part of the drill cylinder and close to the drill bit, and the drill rod rotates and rotates on the support frame.
As an improved technical scheme, the support frame comprises a support ring, the support ring is rotatably mounted with the drill rod through a bearing, a plurality of support rods are arranged on the periphery of the support ring, and one end part of the support rod, which is far away from the support ring, is connected with the side wall of the drill cylinder.
As an improved technical scheme, the drill cylinder comprises a first section body and a second section body, the first section body is communicated with the second section body, the supporting frame is arranged at the end part of the first section body, and the driving motor is arranged at the end part of the second section body.
The sand pumping ship comprises the drilling siphon drill bit for the sand pumping ship.
After the technical scheme is adopted, the utility model has the beneficial effects that:
through setting up the bore tube, the drill stem is installed in the bore tube rotation, the drill bit is installed to the one end that the drill stem extends to the bore tube outside, the other end is connected driving motor, can drive the drill bit through driving motor and rotate, and then realize the brill to the riverbed bottom silt, conveniently go deep into the drilling of silt bottom, the outside of bore tube and be close to the one end of drill bit set up water injection mechanism, when the drill bit drills to silt bottom silt, can spray high-pressure water to silt through water injection mechanism, make silt receive the impact and form the mud of floating state, the inner chamber of bore tube still sets up siphon subassembly near the drill bit, can absorb the mud that the high-pressure water impacted through siphon subassembly, because siphon subassembly adopts the negative pressure adsorption function that rivers high-speed movement in-process produced, suction effect is better to the mud that the high-pressure water impacted, sand pumping efficiency and output have been improved, simultaneously, compared with traditional dashing and sucking sand ship, need not set up the sand pump and carry out sand pumping pump's wearing and tearing and maintenance scheduling problem, maintenance cost has been reduced;
the outer side of the water jacket is provided with a plurality of spray nozzles in a circumferential arrangement, the water jacket is connected with a first water pipe, the first water pipe is communicated with a first high-pressure input pipe, high-pressure water is sprayed to sediment of the drill bit accessory through the first high-pressure input pipe, the first water pipe and the plurality of spray nozzles, the sediment floats to form mud, and the mud is convenient to extract;
the siphon assembly comprises a second water pipe, the second water pipe is arranged in a U-shaped structure in the drill cylinder, the U-shaped structure is communicated with a siphon pipe, the siphon pipe is arranged towards the drill bit, meanwhile, one end of the second water pipe is communicated with a second high-pressure input pipe, high-pressure water is conveyed into the second water pipe through the second high-pressure input pipe, when the high-pressure water passes through the U-shaped structure, a negative pressure adsorption effect is formed due to high-speed flow of water flow, mud impacted by the high-pressure water enters the second water pipe along the siphon pipe and is conveyed to a designated area through the second water pipe, and therefore high-efficiency extraction of river sediment is achieved through combination of the impact effect of the high-pressure water and the negative pressure adsorption effect of the siphon assembly;
the stability of the drill rod during rotation is enhanced by the support frame.
In summary, the utility model provides the drilling and jetting siphon drill bit for the sand pumping boat and the sand pumping boat, which penetrate into a sufficient region of sediment at the bottom of a river bed in a drilling mode, realize the extraction of sediment at the bottom of the river by jetting high-pressure water and siphon pipelines, and have the advantages of high sand pumping efficiency, high yield and low maintenance cost.
Drawings
In order to more clearly illustrate the embodiments of the present utility model 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. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is a schematic view of another angular cross-sectional structure of the present utility model;
fig. 4 is a schematic structural view of a second water pipe according to the present utility model;
reference numerals: 1. the drilling barrel comprises a drilling barrel body 101, a first section body 102, a second section body 2, a drilling rod 3, a drilling bit 4, a driving motor 5, a water jacket 6, a jet nozzle 7, a first water delivery pipe 8, a second water delivery pipe 801, a water inlet section 802, a water return section 9, a siphon pipe 10, a supporting frame 101, a supporting ring 102 and a supporting rod.
Detailed Description
The utility model will be further illustrated with reference to specific examples. The purpose and purpose of these exemplary embodiments are merely to illustrate the present utility model and are not intended to limit the true scope of the present utility model in any way.
As shown in fig. 1-3, a drilling siphon drill bit for sand pumping ship comprises a drill cylinder 1, wherein a drill rod 2 is rotatably installed in the drill cylinder 1, one end of the drill rod 2 extends to the outer side of the drill cylinder 1 and is provided with a drill bit 3 in a bolt or welding mode, one end, close to the drill bit 3, of the outer side of the drill cylinder 1 is provided with a water injection mechanism, and a siphon component is arranged in an inner cavity of the drill cylinder 1 and close to the drill bit 3;
the driving motor 4 is installed through bolt or welded mode on the other end of drilling rod 2 and being located bore section of thick bamboo 1, in this embodiment, driving motor 4 adopts servo motor, driving motor 4's output shaft passes through coupling joint drilling rod 2, from this, can drive drill bit 3 through driving motor 4 and rotate, and then realize the drilling to riverbed bottom silt, conveniently deep into silt bottom exploitation silt, bore section of thick bamboo 1's outside and be close to drill bit 3's one end and set up water jetting mechanism, when drill bit 3 drills silt to silt bottom, can spray high-pressure water to silt through water jetting mechanism, make silt impacted and form the mud of floating state, bore section of thick bamboo 1's inner chamber and still set up siphon subassembly near drill bit 3 department, can absorb the mud that high-pressure water impacted, because siphon subassembly adopts the negative pressure adsorption function that the rivers high-speed movement in-process produced, the effect of absorbing of mud that is impacted to high-pressure water is better, sand pumping efficiency and output have been improved simultaneously, compared with traditional flushing and sucking sand pump, set up sand pump carries out sand pumping pump, therefore, can not produce sand pumping pump maintenance and abrasion cost has been reduced.
Referring to fig. 1-3, the water injection mechanism includes a hollow water jacket 5, the water jacket 5 is mounted on an outer side wall of the drill barrel 1 near one end of the drill bit 3 by bolts or welding, a plurality of injection nozzles 6 are arranged on an outer circumference of the water jacket 5, in this embodiment, the injection directions of the injection nozzles 6 are inclined downwards, the water jacket 5 is connected with a first water pipe 7, the first water pipe 7 is communicated with a first high-pressure input pipe, and high-pressure water is injected to silt near the drill bit 3 by the first high-pressure input pipe, the first water pipe 7 and the injection nozzles 6, so that the silt floats to form mud, and extraction is facilitated.
As shown in fig. 1-3, the first water pipe 7 is arranged in the inner cavity of the drill cylinder 1, one end of the first water pipe penetrates through the side wall of the drill cylinder 1 and is communicated with the water jacket 5, the other end of the first water pipe is arranged far away from the drill bit 3 along the side wall of the inner cavity of the drill cylinder 1, the end of the first water pipe also penetrates through the side wall of the drill cylinder 1 and is communicated with the first high-pressure input pipe, and high-pressure water is conveyed into the first water pipe 7 through the first high-pressure input pipe;
in this embodiment, the first high-pressure input pipe and the second high-pressure input pipe are connected to at least one high-pressure pump, and the first high-pressure input pipe and the second high-pressure input pipe are conventional high-pressure delivery pipes, which are not labeled in the figure.
As shown in fig. 1-4, the siphon assembly comprises a second water pipe 8, the second water pipe 8 is arranged in a U-shaped structure in the inner cavity of the drill cylinder 1, a siphon pipe 9 is communicated with the U-shaped structure of the second water pipe 8, and one end of the siphon pipe 9 away from the second water pipe 8 is arranged close to the drill bit 3;
the two ends of the second water pipe 8 far away from the U-shaped structure respectively penetrate through the side wall of the drill cylinder 1 and extend to the outer side of the drill cylinder 1, one end of the second water pipe is communicated with the second high-pressure input pipe, high-pressure water is conveyed into the second water pipe 8 through the second high-pressure input pipe, when the high-pressure water passes through the U-shaped structure, as the high-speed flow of water flow can form a negative pressure adsorption effect, mud impacted by the high-pressure water enters the second water pipe 8 along the siphon pipe 9 and is conveyed to a designated area by the second water pipe 8, and therefore the high-efficiency extraction of river sediment is achieved through the combination of the impact effect of the high-pressure water and the negative pressure adsorption effect of the siphon component.
Referring to fig. 4, a section of the U-shaped structure of the second water pipe 8, which is close to the second high-pressure input pipe, is a water inlet section 801, another section is a water return section 802, the diameter of the water return section 802 is larger than that of the water inlet section 801, and the siphon pipe 9 is communicated with the water return section 802, so that the negative pressure adsorption function of the siphon pipe 9 is enhanced because the diameter of the water return section 802 is larger than that of the water inlet section 801.
As shown in fig. 1-3, a support frame 10 is arranged at the end part of the drill cylinder 1 and close to the drill bit 3, the drill rod 2 rotates and is fixedly rotated on the support frame 10 through a bearing, and the stability of the drill rod 2 during rotation is enhanced through the support frame 10.
As shown in fig. 1-3, the support frame 10 comprises a support ring 101, an inner cavity of the support ring 101 is rotatably mounted with the drill rod 2 through a bearing, a plurality of support rods 102 are arranged on the circumference of the support ring 101 in a welding mode, and one end part, far away from the support ring 101, of each support rod 102 is welded with the side wall of the drill cylinder 1.
Referring to fig. 1 to 3, the drill barrel 1 includes a first segment 101 and a second segment 102, the first segment 101 is communicated with the second segment 102, the support frame 10 is disposed at an end portion of the first segment 101 far away from the second segment 102 in a welding manner, and the driving motor 4 is disposed at an end portion of the second segment 102 far away from the first segment 101 in a bolt or welding manner.
Referring to fig. 1-3, a sand pumping vessel includes a drill siphon drill bit for the sand pumping vessel.
For ease of understanding, the working procedure of this embodiment is given below:
as shown in fig. 1-4, first, the drill rod 2 is driven to rotate by the driving motor 4, the drill bit 3 is driven to rotate synchronously in the rotation process of the drill rod 2, so that the drilling of silt at the bottom of a river bed is realized, when the drill bit 3 drills to a silt layer at the bottom of the silt, the first high-pressure input pipe conveys high-pressure water into the water jacket 5 through the first water pipe 7, then, the high-pressure water in the water jacket 5 is sprayed to the silt through the plurality of spray nozzles 6, the silt forms mud in a floating state under the impact of the high-pressure water, meanwhile, the second high-pressure input pipe conveys the high-pressure water to the second water pipe 8, when the high-pressure water passes through the U-shaped structure of the second water pipe 8, as the high-speed flow of the high-pressure water can form a negative pressure adsorption effect at the backwater section 802 of the U-shaped structure, the mud impacted by the high-pressure water enters the second water pipe 8 along the siphon pipe 9 and is conveyed to a designated area by the second water pipe 8, and the high-pressure adsorption effect of the second water pipe 8 is combined, so that the high-efficiency pumping of the silt at the river bed is realized.
In summary, the utility model provides the drilling siphon drill bit for the sand pumping boat and the sand pumping boat, which penetrate into a sufficient region of sediment at the bottom of a river bed in a drilling mode, and realize the extraction of sediment at the bottom of the river by spraying high-pressure water and a siphon pipeline, so that the sand pumping efficiency is high, the yield is high, and the maintenance cost is low.
It should be understood that these examples are for the purpose of illustrating the utility model only and are not intended to limit the scope of the utility model. Furthermore, it is to be understood that various changes, modifications and/or variations may be made by those skilled in the art after reading the technical content of the present utility model, and that all such equivalents are intended to fall within the scope of the present utility model as defined in the appended claims.
Claims (9)
1. The utility model provides a sand pumping marine drill shoots siphon drill bit which characterized in that: the drilling machine comprises a drilling barrel, wherein a drill rod is rotatably installed in the drilling barrel, one end of the drill rod extends to the outer side of the drilling barrel and is provided with a drill bit, a water injection mechanism is arranged at the outer side of the drilling barrel and at one end, close to the drill bit, of the drilling barrel, and a siphon component is arranged in an inner cavity of the drilling barrel and at a position, close to the drill bit;
the other end of the drill rod is positioned on the drill cylinder and provided with a driving motor, and an output shaft of the driving motor is connected with the drill rod.
2. The drilling and jetting siphon drill bit for sand pumping vessel as set forth in claim 1, wherein: the water injection mechanism comprises a hollow water jacket, the water jacket is arranged on the outer side wall of the drill cylinder, which is close to one end of the drill bit, a plurality of injection nozzles are arranged on the outer circumference of the water jacket, and a first water pipe is connected to the water jacket.
3. The drilling and jetting siphon drill bit for sand pumping vessel as set forth in claim 2, wherein: the first water delivery pipe is arranged in the inner cavity of the drill cylinder, one end of the first water delivery pipe penetrates through the side wall of the drill cylinder and is communicated with the water jacket, the other end of the first water delivery pipe is arranged along the side wall of the inner cavity of the drill cylinder and away from the drill bit, and the end part of the first water delivery pipe also penetrates through the side wall of the drill cylinder and is communicated with the first high-pressure input pipe.
4. The drilling and jetting siphon drill bit for sand pumping vessel as set forth in claim 1, wherein: the siphon assembly comprises a second water conveying pipe, the second water conveying pipe is arranged in a U-shaped structure in the inner cavity of the drill cylinder, the siphon is communicated with the U-shaped structure of the second water conveying pipe, one end of the siphon, which is far away from the second water conveying pipe, is close to the drill bit, two ends of the second water conveying pipe respectively penetrate through the side wall of the drill cylinder and extend to the outer side of the drill cylinder, and one end of the second water conveying pipe is communicated with a second high-pressure input pipe.
5. The drilling and jetting siphon drill bit for sand pumping vessel as set forth in claim 4, wherein: one section of the U-shaped structure of the second water conveying pipe, which is close to the second high-pressure input pipe, is a water inlet section, the other section of the U-shaped structure of the second water conveying pipe is a water return section, the diameter of the water return section is larger than that of the water inlet section, and the siphon pipe is communicated with the water return section.
6. The drilling and jetting siphon drill bit for sand pumping vessel as set forth in claim 1, wherein: the end part of the drill cylinder and the part close to the drill bit are provided with supporting frames, and the drill rod rotates and is rotatably arranged on the supporting frames.
7. The drilling and jetting siphon drill bit for sand pumping vessel as set forth in claim 6, wherein: the support frame includes the supporting ring, the supporting ring pass through the bearing with the drilling rod rotates the installation, the week circle arrangement of supporting ring is equipped with a plurality of bracing pieces, the bracing piece is kept away from the one end tip of supporting ring with the lateral wall of boring section of thick bamboo is connected.
8. The drilling and jetting siphon drill bit for sand pumping vessel as set forth in claim 6, wherein: the drill cylinder comprises a first section body and a second section body, the first section body is communicated with the second section body, the supporting frame is arranged at the end part of the first section body, and the driving motor is arranged at the end part of the second section body.
9. The utility model provides a sand pumping ship which characterized in that: the sand pumping vessel comprises the drilling siphon drill bit for the sand pumping vessel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320645397.4U CN219654632U (en) | 2023-03-24 | 2023-03-24 | Drilling and jetting siphon drill bit for sand pumping ship and sand pumping ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320645397.4U CN219654632U (en) | 2023-03-24 | 2023-03-24 | Drilling and jetting siphon drill bit for sand pumping ship and sand pumping ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219654632U true CN219654632U (en) | 2023-09-08 |
Family
ID=87878652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320645397.4U Active CN219654632U (en) | 2023-03-24 | 2023-03-24 | Drilling and jetting siphon drill bit for sand pumping ship and sand pumping ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219654632U (en) |
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2023
- 2023-03-24 CN CN202320645397.4U patent/CN219654632U/en active Active
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