CN114922244A - Composite mud suction device joint with mud dredging rake and operation method thereof - Google Patents
Composite mud suction device joint with mud dredging rake and operation method thereof Download PDFInfo
- Publication number
- CN114922244A CN114922244A CN202210548652.3A CN202210548652A CN114922244A CN 114922244 A CN114922244 A CN 114922244A CN 202210548652 A CN202210548652 A CN 202210548652A CN 114922244 A CN114922244 A CN 114922244A
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- Prior art keywords
- rake
- mud
- fixed
- main shaft
- dredging
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 239000010802 sludge Substances 0.000 claims description 31
- 239000002689 soil Substances 0.000 claims description 19
- 238000009825 accumulation Methods 0.000 claims description 4
- 210000003323 beak Anatomy 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9256—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head
- E02F3/9268—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements
- E02F3/9281—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements with axis of rotation in horizontal and transverse direction of the suction pipe
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/282—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with rotating cutting or digging tools
-
- 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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a composite mud sucker joint with a mud dredging rake and an operation method thereof, the composite mud sucker joint comprises a mud sucker joint main body, the mud sucker joint main body comprises a mud sucker joint shell and a mud sucker discharge pipe, the mud sucker discharge pipe is arranged at the mud outlet end of the mud sucker joint shell, a mud dredging rake assembly is arranged in the mud inlet end of the mud sucker joint shell, a filtering module is arranged between the mud dredging rake assembly and the mud sucker discharge pipe, the filtering module is fixed on the mud sucker joint shell, the mud dredging rake assembly comprises an upper rake assembly, a lower rake assembly and a fixed rake assembly, the upper rake assembly is arranged at the upper side of the mud sucker joint shell, the lower rake assembly is arranged at the lower side of the mud sucker joint shell, the fixed rake assembly is positioned at the outer side between the upper rake assembly and the lower rake assembly, and the upper rake assembly, the lower rake component and the fixed rake component are arranged in a triangular mode to form three-way cutting. The invention improves the efficiency of the automatic silt absorption device, saves energy and prolongs the service life of the whole silt absorption device.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and particularly relates to a composite sludge suction device joint with a sludge dredging rake and an operation method thereof.
Background
River channel siltation accumulation has affected the normal performance of various functions such as flood control and navigation, and also has affected the daily enjoyment of the river channel. In order to restore the normal functions of the river channel, the related work of the river channel dredging engineering gradually steps into the field of view of the public.
At present, the river silt in the city is mainly cleaned by manual fishing or grab bucket, but the mode not only can consume a large amount of labor cost, but also the dredging effect is greatly influenced by the actual situation of the river. At present, some patents adopt pumping schemes for dredging and other technical schemes to solve the problem, however, in consideration of the service life of a suction device, a suction port cannot be arranged in high-concentration sludge, so that the sludge absorbed by the technologies mainly comprises low-concentration sludge, a series of treatments are required subsequently, and the resources are actually greatly lost.
Therefore, in order to solve such problems, improvements in the suction dredge joint used in such technologies are required.
Disclosure of Invention
In view of the above problems, the present invention provides a composite mud suction device joint with a mud dredging rake and an operation method thereof.
In order to achieve the purpose, the following technical scheme is provided:
the utility model provides a compound soil suction device joint of mud rake is dredged in area, connects the main part including the soil suction device, and the soil suction device connects the main part to include that the soil suction device connects the casing and the soil suction device row sends the pipe, and the mud discharge end of soil suction device joint casing is located to the soil suction device row send pipe, and its characterized in that soil suction device connects the mud end of casing to be equipped with in and dredges mud rake subassembly, dredges to be equipped with between mud rake subassembly and the soil suction device row send pipe and filters the module, filters the module and fixes on the soil suction device connects the casing.
Furthermore, the mud dredging rake component comprises an upper rake component, a lower rake component and a fixed rake component, the upper rake component is arranged on the upper side of the mud sucker joint shell, the lower rake component is arranged on the lower side of the mud sucker joint shell, the fixed rake component is fixed on the outer side of the mud inlet end of the mud sucker joint shell and positioned on the outer side between the upper rake component and the lower rake component, and the upper rake component, the lower rake component and the fixed rake component are arranged in a triangular mode.
Furthermore, the upper rake component comprises an upper rake main shaft, an upper mud dredging rake and an upper main shaft control motor, one end of the upper rake main shaft is arranged on the inner wall of the side edge of the mud sucker joint shell, the other end of the upper rake main shaft extends out of the mud sucker joint shell and is connected with the upper main shaft control motor, the upper main shaft control motor drives the upper rake main shaft to rotate, and the upper mud dredging rake is vertically and annularly arranged on the upper rake main shaft.
Further, the lower rake assembly comprises a lower rake main shaft, a lower mud dredging rake and a lower main shaft control motor, one end of the lower rake main shaft is arranged on the inner wall of the side edge of the mud suction device connector shell, the other end of the lower rake main shaft extends out of the mud suction device connector shell and is connected with the lower main shaft control motor, the lower main shaft control motor drives the lower rake main shaft to rotate, the lower mud dredging rake is vertically and annularly arranged on the lower rake main shaft, and the upper mud dredging rake and the lower mud dredging rake are arranged in a staggered mode.
Furthermore, the upper mud dredging rake and the lower mud dredging rake respectively comprise a cylindrical structure and a conical structure, one end of the cylindrical structure is fixed on the upper rake main shaft or the lower rake main shaft, and the other end of the cylindrical structure is fixedly connected with the conical structure.
Furthermore, the fixed rake component comprises a fixing rod, a fixed rake main shaft and a fixed rake, the fixed rake main shaft is arranged in the middle of the outer sides of the upper rake main shaft and the lower rake main shaft, the fixed rake main shaft is fixed on the mud suction device joint shell through the fixing rod, the fixed rake is uniformly, vertically and annularly arranged on the fixed rake main shaft in an annular mode, the fixed rake comprises a first fixed rake, a second fixed rake and a third fixed rake, the first fixed rake faces towards the upper rake main shaft and is arranged in a crossed mode with the upper rake, the second fixed rake faces towards the lower rake main shaft and is arranged in a staggered mode with the lower rake, and the third fixed rake faces towards the outer side.
Furthermore, the fixed rake is of an eagle beak structure, a groove is formed in the bottom of the mud sucker joint shell and is located on the outer side of the lower rake main shaft, and therefore the sludge absorption area is increased.
Furthermore, the filtering module is a panel with an arc-shaped structure, and small holes are uniformly formed in the panel.
The operation method of the composite mud sucker joint with the mud dredging rake comprises the following steps:
1) the mud sucker joint is arranged at a mud accumulation position to start working;
2) in 0-t time, the upper rake assembly rotates clockwise, the lower rake assembly rotates clockwise, the fixed rake assembly is fixed, and forward three-way sludge cutting is realized;
3) in the time of t-2t, the upper rake component rotates anticlockwise, the lower rake component rotates clockwise, the fixed rake component is fixed, and reverse three-way sludge cutting is achieved.
4) According to the time T =2T, the upper rake component continuously rotates forwards and backwards to rapidly cut the sludge until the sludge is cut;
the time t is determined by the concentration condition of the sludge sucked by the sludge sucker joint.
The efficiency of silt cutting is increased through the forward and reverse rotation of the upper and lower rake assemblies, and the integral stable operation of the mud suction device is further protected.
Further, the rotation speed relationship of the upper rake component and the lower rake component is as follows: the rotating speed of the upper rake component is half of that of the lower rake component.
The invention has the beneficial effects that:
1) before sludge is sucked, the sludge is cut in advance, so that the efficiency is improved for the subsequent sludge absorption;
2) through the control and the staggered arrangement of the spatial positions of the upper rake component, the lower rake component and the fixed rake component, on the basis of three-dimensional cutting, forward-reverse circulation cutting sludge is formed in the movement period of the fixed rake component, so that the effects of smashing and refining the sludge are achieved, and the suction pump module is beneficial to quickly sucking and discharging the sludge and protecting the suction pump module;
3) set up silt and filter the module, further control the silt size, the protection pumps the high efficiency operation of pumping the module.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a schematic view of the arrangement of the upper rake assembly, the lower rake assembly and the fixed rake assembly;
fig. 5 is an assembly schematic of the present invention.
In the figure: 1. a mud sucker joint main body; 11. a mud sucker joint housing; 12. a filtering module; 13. a mud sucker discharging pipe; 2. an upper rake assembly; 21. an upper rake main shaft; 22. mud dredging rake; 23. an upper spindle control motor; 3. a lower rake assembly; 31. a lower rake main shaft; 32. b, discharging the sludge-dredging rake; 33. a lower spindle control motor; 4. fixing a rake component; 41. fixing the rod; 42. fixing a rake main shaft; 43. fixing a rake; 431. a first fixed rake; 432. a second fixed rake; 433. and a third fixed rake.
Detailed Description
The invention will be further described with reference to the drawings attached to the description, but the scope of the invention is not limited thereto.
As shown in fig. 1-4, a composite mud sucker joint with a mud dredging rake comprises a mud sucker joint main body 1, an upper rake component 2, a lower rake component 3 and a fixed rake component 4, wherein the mud sucker joint main body 1 comprises a mud sucker joint shell 11, a filtering module 12 and a mud sucker conveying pipe 13, the mud sucker conveying pipe 13 is arranged at the mud outlet end of the mud sucker joint shell 11, the upper rake component 2, the lower rake component 3 and the fixed rake component 4 are arranged at the mud inlet end of the mud sucker joint shell 11, the filtering module 12 is fixed on the mud sucker joint shell 11, the filtering module 12 is a panel with an arc structure, small holes are uniformly arranged on the panel, the upper rake component 2 is arranged at the upper side of the mud sucker joint shell 11, the lower rake component 3 is arranged at the lower side of the mud sucker joint shell 11, the fixed rake component 4 is fixed at the outer side of the mud sucker joint shell 11 and is positioned at the outer side between the upper rake component 2 and the lower rake component 3, the upper rake component 2, the lower rake component/3 and the fixed rake component 4 are arranged in a triangular mode, the upper rake component 2 comprises an upper rake spindle 21, an upper mud dredging rake 22 and an upper spindle control motor 23, one end of the upper rake spindle 21 is arranged on the inner wall of the side edge of the mud sucker joint shell 11, the other end of the upper rake spindle 21 extends out of the mud sucker joint shell 11 and is connected with the upper spindle control motor 23, the upper spindle control motor 23 drives the upper rake spindle 21 to rotate, the upper mud dredging rake 22 is vertically and annularly arranged on the upper rake spindle 21, the lower rake component 3 comprises a lower rake spindle 31, a lower mud dredging rake 32 and a lower spindle control motor 33, one end of the lower rake spindle 31 is arranged on the inner wall of the side edge of the mud sucker joint shell 11, the other end of the lower rake spindle 31 extends out of the mud sucker joint shell 11 and is connected with the lower spindle control motor 33, the lower spindle control motor 33 drives the lower rake spindle 31 to rotate, and the lower rake spindle 32 is vertically and annularly arranged on the lower rake spindle 31, the upper mud dredging rake 22 and the lower mud dredging rake 32 are arranged in a staggered manner, the upper mud dredging rake 22 and the lower mud dredging rake 32 respectively comprise a cylindrical structure and a conical structure, one end of the cylindrical structure is fixed on the upper rake main shaft 21 or the lower rake main shaft 31, and the other end of the cylindrical structure is fixedly connected with the conical structure; the fixed rake assembly 4 comprises a fixed rod 41, a fixed rake main shaft 42 and a fixed rake 43, the fixed rake main shaft 42 is arranged in the middle of the outer sides of the upper rake main shaft 21 and the lower rake main shaft 31, the fixed rake main shaft 42 is fixed on the mud sucker joint housing 11 through the fixed rod 41, the fixed rake 43 is uniformly, vertically and annularly arranged on the fixed rake main shaft 42, the fixed rake 43 is of a eagle beak structure and comprises a first fixed rake 431, a second fixed rake 432 and a third fixed rake 433, the first fixed rake 431 faces the upper rake main shaft 21 and is arranged in a crossing mode with the upper mud dredging rake 22, the second fixed rake 432 faces the lower rake main shaft 31 and is arranged in a staggered mode with the lower mud dredging rake 32, the third fixed rake 433 faces the outer side, a groove is formed in the bottom of the mud sucker joint housing 11 and is located on the outer side of the lower rake main shaft 31.
As shown in FIG. 5, the operation method of the joint of the composite mud sucker with the mud dredging rake comprises the following steps:
1) a mud sucker joint is arranged on the remote control submersible dredging vehicle through a mud sucker discharge pipe 13, and the mud sucker joint is arranged at a sludge accumulation position to start working;
2) in the time of 0-t, the upper rake component 2 rotates clockwise, the lower rake component 3 rotates clockwise, and the fixed rake component 4 is fixed, so that the forward three-way sludge cutting is realized;
3) in the time of t-2t, the upper rake component 2 rotates anticlockwise, the lower rake component 3 rotates clockwise, and the fixed rake component 4 is fixed, so that reverse three-way sludge cutting is realized;
4) the upper rake component 2 continuously rotates forwards and backwards to rapidly cut the sludge according to the time T =2T until the sludge is cut;
the time t is determined by the concentration condition of the sludge sucked by the sludge sucker joint, and the rotating speed of the upper rake assembly 2 is half of that of the lower rake assembly 3.
Claims (10)
1. The utility model provides a compound soil suction device joint of mud rake is dredged in area, connect main part (1) including the soil suction device, soil suction device connects main part (1) to connect casing (11) and soil suction device to arrange and send pipe (13) including the soil suction device, the mud suction device is arranged and is sent pipe (13) and locate the play mud end that soil suction device connects casing (11), the mud rake subassembly is dredged in advancing the mud end of its characterized in that soil suction device joint casing (11), it arranges and is equipped with between sending pipe (13) to dredge mud rake subassembly and soil suction device and filters module (12), it fixes on soil suction device connects casing (11) to filter module (12).
2. The composite mud sucker joint with the mud dredging rake according to claim 1, wherein the mud dredging rake assembly comprises an upper rake assembly (2), a lower rake assembly (3) and a fixed rake assembly (4), the upper rake assembly (2) is arranged on the upper side of the mud sucker joint housing (11), the lower rake assembly (3) is arranged on the lower side of the mud sucker joint housing (11), the fixed rake assembly (4) is fixed on the outer side of the mud inlet end of the mud sucker joint housing (11) and is positioned on the outer side between the upper rake assembly (2) and the lower rake assembly (3), and the upper rake assembly (2), the lower rake assembly (3) and the fixed rake assembly (4) are arranged in a triangular mode.
3. The composite mud sucker joint with the mud dredging rake as claimed in claim 2, wherein the upper rake assembly (2) comprises an upper rake spindle (21), an upper mud dredging rake (22) and an upper spindle control motor (23), one end of the upper rake spindle (21) is arranged on the inner wall of the side of the mud sucker joint housing (11), the other end of the upper rake spindle (21) extends out of the mud sucker joint housing (11) and is connected with the upper spindle control motor (23), the upper spindle control motor (23) drives the upper rake spindle (21) to rotate, and the upper mud dredging rake (22) is vertically and annularly arranged on the upper rake spindle (21).
4. The composite mud sucker joint with the mud dredging rake as claimed in claim 3, wherein the lower rake assembly (3) comprises a lower rake main shaft (31), a lower mud dredging rake (32) and a lower main shaft control motor (33), one end of the lower rake main shaft (31) is arranged on the inner wall of the side of the mud sucker joint shell (11), the other end of the lower rake main shaft extends out of the mud sucker joint shell (11) and is connected with the lower main shaft control motor (33), the lower main shaft control motor (33) drives the lower rake main shaft (31) to rotate, the lower mud dredging rake (32) is vertically and annularly arranged on the lower rake main shaft (31), and the upper mud dredging rake (22) and the lower mud dredging rake (32) are arranged in a staggered manner.
5. The composite mud sucker joint with the mud dredging rake as claimed in claim 4, wherein the upper mud dredging rake (22) and the lower mud dredging rake (32) respectively comprise a cylindrical structure and a conical structure, one end of the cylindrical structure is fixed on the upper rake main shaft (21) or the lower rake main shaft (31), and the other end of the cylindrical structure is fixedly connected with the conical structure.
6. The composite mud sucker joint with the mud dredging rake according to claim 5, wherein the fixed rake assembly (4) comprises a fixed rod (41), a fixed rake main shaft (42) and a fixed rake (43), the fixed rake main shaft (42) is arranged in the middle of the outer sides of the upper rake main shaft (21) and the lower rake main shaft (31), the fixed rake main shaft (42) is fixed on the mud sucker joint housing (11) through the fixed rod (41), the fixed rake (43) is uniformly, vertically and annularly arranged on the fixed rake main shaft (42) and comprises a first fixed rake (431), a second fixed rake (432) and a third fixed rake (433), the first fixed rake (431) faces the upper rake main shaft (21) and is arranged to intersect with the upper mud dredging rake main shaft (22), the second fixed rake (432) faces the lower rake main shaft (31) and is arranged to intersect with the lower mud dredging rake (32), the third fixed rake (433) faces outwards.
7. The composite mud sucker joint with the mud dredging rake as claimed in claim 6, wherein the fixed rake (43) is of an eagle beak structure, and the bottom of the mud sucker joint shell (11) is provided with a groove which is positioned at the outer side of the lower rake main shaft (31).
8. The composite mud suction device joint with the mud dredging rake as claimed in claim 1, wherein the filtering module (12) is a panel with an arc-shaped structure, and small holes are uniformly formed in the panel.
9. The operation method of the composite suction dredge joint with the dredging rake according to claim 7, characterized by comprising the following steps:
1) the mud sucker joint is arranged at a mud accumulation position to start working;
2) in 0-t time, the upper rake component (2) rotates clockwise, the lower rake component (3) rotates clockwise, and the fixed rake component (4) is fixed, so that the forward three-way sludge cutting is realized;
3) in the time of t-2t, the upper rake component (2) rotates anticlockwise, the lower rake component (3) rotates clockwise, the fixed rake component (4) is fixed, and reverse three-way sludge cutting is realized;
4) according to the time T =2T, the upper rake component (2) continuously rotates positively and negatively to rapidly cut the sludge until the end;
the time t is determined by the concentration condition of the sludge sucked by the sludge sucker joint.
10. The operating method according to claim 9, characterized in that the relationship between the rotational speed of the upper rake assembly (2) and the lower rake assembly (3) is: the rotating speed of the upper rake component (2) is half of that of the lower rake component (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210548652.3A CN114922244A (en) | 2022-05-20 | 2022-05-20 | Composite mud suction device joint with mud dredging rake and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210548652.3A CN114922244A (en) | 2022-05-20 | 2022-05-20 | Composite mud suction device joint with mud dredging rake and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114922244A true CN114922244A (en) | 2022-08-19 |
Family
ID=82808568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210548652.3A Pending CN114922244A (en) | 2022-05-20 | 2022-05-20 | Composite mud suction device joint with mud dredging rake and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114922244A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083134A (en) * | 1975-11-10 | 1978-04-11 | Anglo Dutch Dredging Co. Ltd. | Suction head for dredgers |
| CN206746732U (en) * | 2017-04-18 | 2017-12-15 | 江西江铃有色金属压铸有限公司 | A kind of solid waste processing equipment for pulverizing |
| CN207878534U (en) * | 2018-02-07 | 2018-09-18 | 中交烟台环保疏浚有限公司 | A kind of drag head for inhaling mud for seabed dredging |
| CN208517991U (en) * | 2018-06-27 | 2019-02-19 | 安徽佳明环保科技股份有限公司 | An anti-blocking mechanism for a raking suction ship raking head |
| CN111760637A (en) * | 2020-07-14 | 2020-10-13 | 安徽省益农化工有限公司 | Pesticide production is with high-efficient reducing mechanism |
-
2022
- 2022-05-20 CN CN202210548652.3A patent/CN114922244A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083134A (en) * | 1975-11-10 | 1978-04-11 | Anglo Dutch Dredging Co. Ltd. | Suction head for dredgers |
| CN206746732U (en) * | 2017-04-18 | 2017-12-15 | 江西江铃有色金属压铸有限公司 | A kind of solid waste processing equipment for pulverizing |
| CN207878534U (en) * | 2018-02-07 | 2018-09-18 | 中交烟台环保疏浚有限公司 | A kind of drag head for inhaling mud for seabed dredging |
| CN208517991U (en) * | 2018-06-27 | 2019-02-19 | 安徽佳明环保科技股份有限公司 | An anti-blocking mechanism for a raking suction ship raking head |
| CN111760637A (en) * | 2020-07-14 | 2020-10-13 | 安徽省益农化工有限公司 | Pesticide production is with high-efficient reducing mechanism |
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Application publication date: 20220819 |
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| RJ01 | Rejection of invention patent application after publication |