CN110565722B - Movable double-reamer protection device for preventing slurry from diffusing - Google Patents
Movable double-reamer protection device for preventing slurry from diffusing Download PDFInfo
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- CN110565722B CN110565722B CN201910821444.4A CN201910821444A CN110565722B CN 110565722 B CN110565722 B CN 110565722B CN 201910821444 A CN201910821444 A CN 201910821444A CN 110565722 B CN110565722 B CN 110565722B
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- Prior art keywords
- reamer
- covers
- limiting belt
- limiting
- fixing
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- 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
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- 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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Abstract
A movable double-reamer protecting device for preventing slurry from diffusing relates to the technical field of dredging devices. The movable double-reamer protecting device for preventing the slurry from diffusing comprises two trusses, two fixing covers, at least one first limiting belt and at least one second limiting belt, wherein the trusses are respectively used for fixing a reamer; the two fixing covers are respectively covered on the corresponding reamer, two ends of the first limiting belt are respectively connected with the two fixing covers in a telescopic manner, and two ends of the second limiting belt are respectively connected with the two fixing covers in a telescopic manner; the first limiting belt is located on one side of the tops of the two reamer blades, and the second limiting belt is located on one side, away from the truss, of the two reamer blades. The application provides a prevent mud diffusion's movable two reamer protector can be when adjusting the position between two trusses and the reamer the position of two fixed covers of synchronous adjustment to utilize the mud diffusion of stirring when first spacing area and the spacing band restriction reamer of second is rotatory.
Description
Technical Field
The application relates to the field of dredging devices, in particular to a movable double-reamer protecting device for preventing slurry from diffusing.
Background
The cutter suction dredger is an engineering dredging ship with wide application, and the working principle of the cutter suction dredger is that soil is crushed by the rotary cutting of a reamer and then is mixed with water, then a mud-water mixture is sucked away by a dredge pump and is discharged to a sludge storage treatment point through a pipeline, due to the two-phase flow characteristics of mud, the rotation and transverse movement of the reamer and the flowing of a water body and other factors, the flow field around the reamer is complex during construction, so that sludge dug by the reamer cannot be sucked away by the dredge pump in time and is diffused to a water area to cause secondary pollution, and particularly, the dredging operation is carried out in places with high environmental quality requirements such as lakes, rivers and the like, and the expected effect cannot be achieved. In order to avoid pollution during operation of the cutter suction dredger, a slurry protection cover is often arranged on a reamer of the cutter suction dredger to prevent slurry from diffusing and polluting a water area.
However, two reamers adopted by the currently used movable double-reamer dredger can generate relative displacement in the horizontal and vertical directions so as to realize layered cutting to greatly improve the construction efficiency, and the movable double-reamer dredger cannot be provided with a fixed mud protection cover due to the fact that displacement can be generated between the two reamers, and cannot solve the problem of secondary pollution possibly generated during operation.
Disclosure of Invention
The application aims to provide a movable double-reamer protecting device for preventing mud from diffusing so as to solve the problem of secondary mud pollution during operation of a movable double-reamer dredger.
The embodiment of the application is realized as follows:
the embodiment of the application provides a prevent movable two reamer protector of mud diffusion, it includes:
the two trusses are used for fixing a reamer;
the two fixing covers correspond to and are connected with the trusses one by one and are used for covering the corresponding reamer;
the two ends of the first limiting belt are respectively connected with the two fixing covers in a telescopic manner;
the two ends of the second limiting belt are respectively connected with the two fixing covers in a telescopic manner;
the first limiting belt is located on one side of the tops of the two reamer blades, and the second limiting belt is located on one side, away from the truss, of the two reamer blades.
In some optional embodiments, each fixed cover is connected with a first winding drum, a first spring is arranged in each first winding drum, and two ends of the first limiting belt are respectively connected with the two first springs.
In some optional embodiments, at least one second winding drum is arranged between the two fixed covers, a second spacing belt is respectively connected between the second winding drum and the two fixed covers, and two ends of the two second spacing belts are respectively connected with the corresponding second winding drum and the two fixed covers in a telescopic manner.
In some optional embodiments, a second spring is arranged in the second winding drum, and one end of each of the two second limiting belts is connected with two ends of the corresponding second spring.
In some optional embodiments, the two fixing covers are respectively connected with an adjusting cylinder, each adjusting cylinder is connected with at least one rotatable rotating shaft, one end of each second limiting belt is respectively connected with the two rotating shafts, and the axis of each rotating shaft is parallel to the rotation axis of the reamer.
In some optional embodiments, a cavity is arranged inside the adjusting cylinder, the rotating shaft is arranged in the cavity, and a connecting hole which is perpendicular to the axis of the rotating shaft and is communicated with the cavity is formed in the outer wall of the adjusting cylinder.
In some optional embodiments, the two fixing covers are both arc-shaped and symmetrically arranged, one end of each fixing cover is positioned at the top of the corresponding reamer, and the other end of each fixing cover is positioned at one side of the corresponding reamer far away from the other reamer.
The beneficial effect of this application is: the movable double-twist-cutter protection device for preventing the slurry from diffusing comprises two trusses, two reamers respectively connected with the two trusses, two fixed covers which are connected with the trusses in a one-to-one correspondence mode and are covered on the corresponding reamers, two first winding drums which are connected with the fixed covers in a one-to-one correspondence mode, a first limiting belt, a second winding drum and two second limiting belts, wherein two ends of the first limiting belt, the second winding drum and the two second limiting belts are respectively connected with the two first winding drums in a telescopic mode; one end of each of the two second limiting belts is respectively connected with the second winding drum in a telescopic manner, and the other end of each of the two second limiting belts is respectively connected with the two fixing covers in a telescopic manner; the first limiting belt and the two second limiting belts are respectively connected with two adjacent surfaces of the fixed cover. The application provides a prevent mud diffusion's movable double-reamer protector can be when adjusting the mutual position between two trusses and the reamer the position of two fixed covers of synchronous adjustment to utilize the mud diffusion of stirring when first spacing area and the spacing restriction reamer of second is rotatory.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a first view angle of a movable double-reamer protecting device for preventing mud from spreading according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a second perspective view of a movable double-reamer apparatus for preventing mud from spreading according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a third perspective view of a movable double-reamer apparatus for preventing mud from spreading according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram illustrating a fourth perspective view of the movable double-reamer apparatus for preventing mud from spreading according to the embodiment of the present application;
FIG. 5 is a schematic structural diagram of a first reel of a movable double-reamer protecting device for preventing mud from spreading according to an embodiment of the present disclosure;
FIG. 6 is a cross-sectional view taken at A-A of FIG. 5;
FIG. 7 is a schematic structural diagram of a second reel of the movable double-reamer protecting device for preventing mud from spreading according to the embodiment of the present application;
FIG. 8 is a cross-sectional view taken at B-B of FIG. 7;
FIG. 9 is a schematic structural diagram illustrating a first view angle of an adjustment cylinder in the movable double-reamer apparatus for preventing mud from spreading according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a second viewing angle of an adjustment cylinder in the movable double-reamer protecting device for preventing mud from spreading according to the embodiment of the present application.
In the figure: 100. a truss; 110. a fixed cover; 120. a first reel; 121. a first spring; 122. a first through hole; 130. a first limit belt; 140. a second reel; 141. a second spring; 142. a second through hole; 150. a second limit belt; 160. an adjusting cylinder; 161. a cavity; 162. connecting holes; 163. pulling a rope; 170. a rotating shaft; 180. a connecting rod; 200. a reamer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The features and properties of the movable double-reamer device for preventing the spread of mud of the present application are described in further detail below with reference to examples.
Example 1
As shown in fig. 1, 2, 3 and 4, an embodiment of the present application provides a movable double-reamer protecting device for preventing mud from spreading, which includes two trusses 100 arranged side by side in parallel, one end of each truss 100 is used for fixing one reamer 200 through a rotatable reamer shaft, the two reamers 200 are located at the same end of the two trusses 100, each truss 100 is connected with an arc-shaped fixing cover 110 through two connecting rods 180, the two fixing covers 110 are symmetrically arranged and respectively cover one reamer 200, one end of each fixing cover 110 covers the top of the corresponding reamer 200, and the other end extends to a side of the corresponding reamer 200 away from the other reamer 200.
As shown in fig. 5 and 6, the adjacent ends of the two fixing covers 110 are respectively connected to a first winding drum 120, a first spring 121 is disposed in each first winding drum 120, each first winding drum 120 is provided with a first through hole 122, and the first springs 121 of the two first winding drums 120 are connected to each other through a first spacing band 130, two ends of which respectively penetrate through the two first through holes 122.
As shown in fig. 7 and 8, a second winding drum 140 is further disposed between the two fixed covers 110, a second spiral power spring 141 is disposed in each second winding drum 140, two sides of each second winding drum 140 are respectively provided with a second through hole 142, and two ends of each second spiral power spring 141 are respectively connected with a second limiting belt 150.
As shown in fig. 9 and 10, the two fixing covers 110 are respectively connected with an adjusting cylinder 160, the axis of the adjusting cylinder 160 is perpendicular to the rotation axis of the reamer 200, a cavity 161 and a rotating shaft 170 located in the cavity 161 are arranged inside each adjusting cylinder 160, two ends of the rotating shaft 170 are respectively rotatably connected with two sides of the adjusting cylinder 160, the axis of the rotating shaft 170 is parallel to the rotation axis of the reamer 200, the outer walls of two ends of the adjusting cylinder 160 are respectively provided with a connecting hole 162 which is perpendicular to the axis of the rotating shaft 170 and is communicated with the cavity 161, one end of each second position-limiting belt 150, which is far away from the second winding drum 140, is respectively connected with two pull ropes 163, the pull ropes 163 connected with each second position-limiting belt 150 penetrate through the corresponding two connecting holes 162 and then are connected with the corresponding two rotating shafts 170, and the first winding drum 120 and the adjusting cylinder 160 connected with each fixing cover 110 are connected with each other; the first limiting belt 130 is positioned on one side of the tops of the two reamer 200, and the two second limiting belts 150 are positioned on one sides of the two reamer 200 far away from the truss 100; the first position-limiting strap 130 and the second position-limiting strap 150 are both made of a silicone material.
The movable double-reamer protection device for preventing the diffusion of the slurry is arranged on the corresponding reamer 200 through the fixed cover 110 connected with the truss 100, the two fixed covers 110 are connected by the aid of the first telescopic limiting belt 130 and the second telescopic limiting belt 150, when an operator adjusts the relative position between the two fixed covers 110, the positions of the two fixed covers 110 can move synchronously along with the reamer 200 by the aid of the first telescopic limiting belt 130 and the second telescopic limiting belt 150, and the slurry which is turned over when the reamer 200 rotates is limited by the aid of the first telescopic limiting belt 130 and the second telescopic limiting belt 150.
Specifically, when an operator adjusts the distance between the two trusses 100 to increase so as to adjust the distance between the two reamer blades 200, the two trusses 100 drive the two fixed covers 110 to move in the direction away from each other, so as to overcome the tension of the first spring 121 in the two first drums 120, extend the two ends of the first position-limiting belt 130 out of the first through holes 122 of the two first drums 120, overcome the tension of the second spring 141 in the second drum 140, and extend the end of the two second position-limiting belts 150 connected with the second spring 141 out of the second drum 140, thereby ensuring that the two fixed covers 110 are telescopically connected by the first position-limiting belt 130 and the two second position-limiting belts 150; when the distance between the two trusses 100 is adjusted to be smaller by an operator, the two ends of the first limiting belt 130 are respectively pulled into the two first reels 120 by the contraction force of the two first clockwork springs 121, and the one ends of the two second limiting belts 150 are respectively pulled into the second reel 140 by the contraction force of the second clockwork spring 141, so that the two trusses 100 are connected by the first limiting belt 130 and the second limiting belt 150 when the distance between the two trusses 100 is adjusted by the operator, and the two side faces of the two reamer 200 are limited by the first limiting belt 130 and the second limiting belt 150 in an enclosing manner, so that the reamer 200 is guaranteed to crush soil at the bottom to form mud, and the mud cannot be diffused in a large range to cause pollution.
In addition, when the operator adjusts the two trusses 100 to move up and down to move the two reamer blades 200 up and down to generate relative displacement, the two trusses 100 respectively drive the two fixing covers 110 up and down to make the first position-limiting belts 130, both ends of which are respectively connected with the first clockwork spring 121 in the two first reels 120, tilt at an included angle with respect to the horizontal plane, and at the same time, the two fixing covers 110 respectively drive the two second position-limiting belts 150 up and down to make the pull ropes 163 connected with the two second position-limiting belts 150 move along the corresponding connecting holes 162 formed in the outer wall of the adjusting reel 160, and to make the rotating shafts 170 connected with the pull ropes 163 rotate, so that when the two trusses 100 drive the corresponding reamer blades 200 and the fixing covers 110 to move up and down to generate relative displacement, the first position-limiting belts 130 and the two second position-limiting belts 150 connected between the two fixing covers 110 can tilt at an angle synchronously, and continue to shield the top sides of the two reamer blades 200 and the sides far away from the truss blades 100, so as to prevent the secondary pollution caused by the diffusion of the slurry formed by crushing when the reamer 200 rotates.
In other alternative embodiments, the number of the first position-limiting bands 130 may also be 2, 3, 4, or more than 4; optionally, the number of the second position-limiting belts 150 may also be 1, 3, 4 or more than 4. In some alternative embodiments, the first winding drum 120 may not be provided, and both ends of at least one first stop belt 130 may be connected to the two fixed covers 110; optionally, the second winding drum 140 and the adjusting drum 160 may not be provided, and two ends of at least one second position-limiting belt 150 are respectively connected with the two fixing covers 110; alternatively, instead of the adjusting cylinder 160, only one second winding cylinder 140 may be disposed between the two fixed covers 110, and a second spring 141 may be disposed in the second winding cylinder 140, so that two ends of the second position-limiting band 150 at two ends of the second winding cylinder 140 are respectively connected to the second spring 141 and the two fixed covers 110; optionally, the first and second stop belts 130, 150 may also be made of a rubber material such as, but not limited to, natural rubber, butyl rubber, ethylene propylene rubber, styrene-butadiene rubber, etc., or a plastic material such as, but not limited to, polyethylene, polyvinyl chloride, polyethylene terephthalate, acrylonitrile-butadiene-styrene copolymer, polyurethane, etc. Alternatively, the fixing cover 110 may be a V-shaped bent plate.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (5)
1. A movable double-reamer protection device for preventing mud from diffusing is characterized by comprising:
two trusses, each truss is used for fixing a reamer;
the two fixing covers correspond to and are connected with the trusses one by one, and the fixing covers are used for covering the reamer corresponding to the fixing covers;
the two ends of the first limiting belt are respectively connected with the two fixing covers in a telescopic manner;
the two ends of the second limiting belt are respectively connected with the two fixing covers in a telescopic manner;
the first limiting belt is positioned on one side of the tops of the two reamer blades, and the second limiting belt is positioned on one side of the two reamer blades far away from the truss; each fixed cover is connected with a first winding drum, a first spring is arranged in each first winding drum, and two ends of the first limiting belt are respectively connected with the two first springs; at least one second winding drum is arranged between the two fixed covers, a second limiting belt is connected between the second winding drum and the two fixed covers respectively, and two ends of the two second limiting belts are respectively connected with the corresponding second winding drum and the two fixed covers in a telescopic mode.
2. The movable double-reamer protecting device for preventing the diffusion of the mud as claimed in claim 1, wherein a second spring is arranged in the second winding drum, and one end of each of the two second limiting belts is connected with two ends of the corresponding second spring.
3. The movable double-reamer protection device for preventing mud from diffusing according to claim 1, wherein two of the fixed covers are respectively connected with an adjusting cylinder, each adjusting cylinder is connected with at least one rotatable rotating shaft, one end of each of the two second limiting belts is respectively connected with the two rotating shafts, and the axis of each rotating shaft is parallel to the rotation axis of the reamer.
4. The movable double-reamer protection device capable of preventing mud from diffusing according to claim 3, wherein a cavity is formed in the adjusting cylinder, the rotating shaft is arranged in the cavity, and a connecting hole which is perpendicular to the axis of the rotating shaft and communicated with the cavity is formed in the outer wall of the adjusting cylinder.
5. The movable double-reamer protection device for preventing the spreading of mud according to claim 1, wherein the two fixed covers are both arc-shaped and symmetrically arranged, one end of each fixed cover is positioned at the top of the corresponding reamer, and the other end of each fixed cover is positioned at one side of the corresponding reamer, which is far away from the other reamer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821444.4A CN110565722B (en) | 2019-09-02 | 2019-09-02 | Movable double-reamer protection device for preventing slurry from diffusing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821444.4A CN110565722B (en) | 2019-09-02 | 2019-09-02 | Movable double-reamer protection device for preventing slurry from diffusing |
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| Publication Number | Publication Date |
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| CN110565722A CN110565722A (en) | 2019-12-13 |
| CN110565722B true CN110565722B (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190421A (en) * | 2002-12-13 | 2004-07-08 | Ikeda Kensetsu Kogyo Kk | Dredger cutter head system |
| CN106948399A (en) * | 2017-05-12 | 2017-07-14 | 武汉理工大学 | Self adaptation dual-reamer sludger |
| CN208618478U (en) * | 2018-07-24 | 2019-03-19 | 徐州庚辰工贸有限公司 | A kind of quick Accrete clearing device of hydraulic engineering with agitating function |
| CN208777352U (en) * | 2018-07-05 | 2019-04-23 | 长江南京航道工程局 | A kind of free floating suction dredge(r) drag head at automatic adjustment rotation angle |
| CN110080324A (en) * | 2019-04-24 | 2019-08-02 | 武汉理工大学 | A kind of dual anti-mud disperser based on movable shield and high pressure water curtain |
-
2019
- 2019-09-02 CN CN201910821444.4A patent/CN110565722B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190421A (en) * | 2002-12-13 | 2004-07-08 | Ikeda Kensetsu Kogyo Kk | Dredger cutter head system |
| CN106948399A (en) * | 2017-05-12 | 2017-07-14 | 武汉理工大学 | Self adaptation dual-reamer sludger |
| CN208777352U (en) * | 2018-07-05 | 2019-04-23 | 长江南京航道工程局 | A kind of free floating suction dredge(r) drag head at automatic adjustment rotation angle |
| CN208618478U (en) * | 2018-07-24 | 2019-03-19 | 徐州庚辰工贸有限公司 | A kind of quick Accrete clearing device of hydraulic engineering with agitating function |
| CN110080324A (en) * | 2019-04-24 | 2019-08-02 | 武汉理工大学 | A kind of dual anti-mud disperser based on movable shield and high pressure water curtain |
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| CN110565722A (en) | 2019-12-13 |
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