CN108179979A - It is a kind of that there is the rock drilling device of depositing dust - Google Patents
It is a kind of that there is the rock drilling device of depositing dust Download PDFInfo
- Publication number
- CN108179979A CN108179979A CN201810003367.7A CN201810003367A CN108179979A CN 108179979 A CN108179979 A CN 108179979A CN 201810003367 A CN201810003367 A CN 201810003367A CN 108179979 A CN108179979 A CN 108179979A
- Authority
- CN
- China
- Prior art keywords
- dust
- rock drilling
- chamber
- water tank
- bevel gear
- Prior art date
- 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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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterized by means for land transport with their own drive, e.g. skid mounting or wheel mounting
- E21B7/027—Drills for drilling shallow holes, e.g. for taking soil samples or for drilling postholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
- E21C35/223—Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air
Abstract
There is the rock drilling device of depositing dust the invention discloses a kind of, including towing bracket, dust suction water tank, hoisting mechanism, bottom plate, knapping machine structure and dust-falling mechanism；The upside left end of the bottom plate is installed with towing bracket, is provided with dust suction water tank on the right side of towing bracket, hoisting mechanism is arranged on the right end of dust suction water tank；The knapping machine structure includes chisel stone chamber, the second motor and cylinder chamber；The right end of the chisel stone chamber is communicated with cylinder chamber, and the left end of cylinder chamber is installed with fixed block, and bilateral rack bar is fixedly connected through fixed block and with rock drilling drill rod, and the left end of rock drilling drill rod is installed with rock drilling head；The dust-falling mechanism includes dust hood, piston cylinder and turntable.Of the invention novel in design, easy to operate, the dust-falling mechanism of setting can effectively pump to the dust particles generated during rock drilling in depositing dust water tank discharges clean gas after absorption, so as to effectively ensure the health of construction personnel.
Description
Technical field
It is specifically a kind of that there is the rock drilling device of depositing dust the present invention relates to a kind of winning equipment.
Background technology
Rock drill is mainly used for quarrying stone or removes abandoned building, and rock drill divides pneumatic type rock drill, electrodynamic type chisel
Four class of rock machine, diesel quarrying machine and hydraulic quarrying machine, pneumatic type rock drill with compressed air drive piston in the cylinder to
Preceding impact makes drill rod chisel hit rock, most widely used, and electrodynamic type rock drill drives tup to rush by motor by toggle
Drill rod is hit, chisel hits rock, and diesel quarrying machine utilizes Principles of Internal-Combustion Engine, piston impact drill rod is driven by the power that fires of gasoline,
Chisel hits rock, the construction site suitable for non-transformer, without air source, and fluid pressure type is impacted by hydraulic pressure by inert gas and impact body
Drill rod, chisel hit rock, and the beater mechanism of these rock drills forces drill rod rotational angle in backhaul, by rotating drill rod mechanism, makes bore bit
Change position continues chisel and hits rock, so constantly Ground shock waves and rotation, and discharge aggregate chips using mill exhauster structure, you can dig into big gun
Hole..And in rock drilling machine operation, by reciprocating impact in rock stratum, rock stratum locally crushes and forms borehole, broken rock stratum meeting drill rod
A large amount of dust is formed, adverse effect is brought to the health of construction personnel.
Invention content
There is the rock drilling device of depositing dust the purpose of the present invention is to provide a kind of, to solve to carry in above-mentioned background technology
The problem of going out.
To achieve the above object, the present invention provides following technical solution：
It is a kind of that there is the rock drilling device of depositing dust, including towing bracket, dust suction water tank, hoisting mechanism, bottom plate, knapping machine structure and
Dust-falling mechanism；The upside left end of the bottom plate is installed with towing bracket, and dust suction water tank is provided on the right side of towing bracket, is promoted
Mechanism is arranged on the right end of dust suction water tank；The knapping machine structure includes chisel stone chamber, the second motor and cylinder chamber, chisel stone intracavitary side pair
Title is equipped with worm screw, and the worm screw of upper end passes through the right wall of chisel stone chamber and is rotatablely connected by the output shaft of belt and the second motor,
The left end of two worm screws is rotatablely connected by belt, and worm gear, shaft front end and the incomplete tooth of worm gear are provided on the inside of worm screw
Wheel is fixedly connected, and bilateral rack bar is provided on the inside of partial gear；The right end of the chisel stone chamber is communicated with cylinder chamber, cylindricality
The left end of chamber is installed with fixed block, and bilateral rack bar is fixedly connected through fixed block and with rock drilling drill rod, rock drilling drill rod
Left end is installed with rock drilling head；The dust-falling mechanism includes dust hood, piston cylinder and turntable, is communicated with and leads on the outside of dust hood
Pipe, the other end of conduit are connected with being fixedly mounted on the piston cylinder of chisel stone chamber lower end, and check valve is provided in conduit, piston cylinder
Downside right end is connected by conduit with the right end of dust suction water tank, and check valve is again provided in conduit；It is slided in the piston cylinder
Piston is provided with, piston is fixedly connected with catch bar, and catch bar runs through the left wall of piston cylinder and is hinged with connecting rod, connecting rod
The other end is rotatably connected at the eccentric position of turntable；Bevel gear D, bevel gear are installed in the rear end shaft of the turntable
D is engaged with bevel gear C, and the shaft upper end of bevel gear C is fixedly connected with bevel gear B, and bevel gear B is with being fixedly mounted on lower end worm screw
The bevel gear A engagements of left end.
As further embodiment of the present invention：The bottom plate lower end is symmetrically arranged with wheel, and locking machine is provided on wheel
Structure.
As further scheme of the invention：First motor is clockwise and anticlockwise motor.
As further scheme of the invention：The hoisting mechanism includes promoting chamber, the first motor, threaded rod and movement
Block promotes chamber and is fixedly mounted on bottom plate upper end, and promotes intracavitary side and be rotatably connected to threaded rod, and the upper end of threaded rod is through promotion
It chamber upper end and is fixedly connected with the output shaft of the first motor.
As further scheme of the invention：Movable block is threaded on the threaded rod, movable block is propped up with activity
Frame is fixedly connected, and movable support is fixedly connected through the straight slot for promoting the setting of chamber right end and with knapping machine structure.
As further scheme of the invention：Movable plate is also installed on the rock drilling drill rod, movable plate slides
It is connected on the sliding slot being set on the inside of cylinder chamber, and movable plate is connect by buffer spring with fixed plate.
As further scheme of the invention：The dust hood passes through elastic telescopic in horn-like and dust hood left end
Pipe is connected with cylinder chamber.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, knapping machine structure can be driven to move up and down by the hoisting mechanism of setting, chisel stone is carried out so as to fulfill to different location, side
Just it adjusts, it is highly practical；
2nd, partial gear is driven to rotate by symmetrically arranged worm and gear, partial gear is driven by bilateral rack bar and dug
Rock drill rod moves left and right toward renaturation and carries out rock drilling work, and high degree of automation realizes and manpower replaced to work with machine, greatly
Reduce the workload of worker, and eliminate existing security risk greatly, greatly improve work efficiency；
3rd, effectively the dust particles generated during rock drilling can be pumped in depositing dust water tank by the dust-falling mechanism of setting and inhaled
Attached discharge clean gas, so as to effectively ensure the health of construction personnel.
Description of the drawings
Fig. 1 is the structure diagram for having the function of the rock drilling device of depositing dust.
Fig. 2 is the schematic enlarged-scale view at A in the rock drilling device for have the function of depositing dust.
Fig. 3 is the schematic enlarged-scale view at B in the rock drilling device for have the function of depositing dust.
Fig. 4 is the side view of the rock drilling device turntable with depositing dust.
In figure：1- towing brackets, 2- dust suctions water tank, 3- promote chamber, the first motors of 4-, 5- threaded rods, 6- movable blocks, 7- and live
Dynamic stent, 8- universal wheels, 9- bottom plates, 10- chisel stones chamber, the second motors of 11-, 12- piston cylinders, 13- pistons, 14- rock drilling head, 15-
Dust hood, 16- worm screws, 17- worm gears, 18- partial gears, the bilateral rack bars of 19-, 20- fixed blocks, 21- buffer springs, 22-
Movable plate, 23- sliding slots, 24- bevel gear A, 25- bevel gear B, 26- turntable, 27- connecting rods, 28- catch bars, 29- bevel gears C,
30- bevel gear D, 31- rock drilling drill rod, 32- cylinder chambers.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig.1 ~ 4, it is a kind of that there is the rock drilling device of depositing dust, including towing bracket 1, dust suction water tank 2, elevator
Structure, bottom plate 9, knapping machine structure and dust-falling mechanism；9 lower end of bottom plate is symmetrically arranged with wheel 8, and locking machine is provided on wheel 8
Structure, the setting of wheel 8 are that the device is facilitated to move, and the upside left end of bottom plate 9 is installed with towing bracket 1, and towing bracket 1 is used
In connection draft gear, 1 right side of towing bracket is provided with dust suction water tank 2, and the hoisting mechanism is arranged on the right side of dust suction water tank 2
End, hoisting mechanism include promoting chamber 3, the first motor 4, threaded rod 5 and movable block 6, promote chamber 3 and are fixedly mounted on 9 upper end of bottom plate,
And promote the inside of chamber 3 and be rotatably connected to threaded rod 5, the upper end of threaded rod 5 is through promoting 3 upper end of chamber and defeated with the first motor 4
Shaft is fixedly connected, and first motor 4 is clockwise and anticlockwise motor, movable block 6 is threaded on threaded rod 5, movable block 6 is with living
Dynamic stent 7 is fixedly connected, and movable support 7 is fixedly connected through the straight slot for promoting the setting of 3 right end of chamber and with knapping machine structure, the first electricity
Above and below the knapping machine structure for 7 right end of movable support being driven to be fixedly connected by the effect of threaded rod 5 and movable block 6 during 4 rotating of machine
It is mobile, chisel stone is carried out so as to fulfill to different location, it is applied widely.
The knapping machine structure includes chisel stone chamber 10, the second motor 11 and cylinder chamber 32, and 10 inside of chisel stone chamber is symmetrically installed with
Worm screw 16, the worm screw 16 of upper end pass through the right wall of chisel stone chamber 10 and are rotatablely connected by the output shaft of belt and the second motor 11,
The left end of two worm screws 16 is rotatablely connected by belt, and the inside of worm screw 16 is provided with worm gear 17, the shaft front end of worm gear 17 with
Partial gear 18 is fixedly connected, and the inside of partial gear 18 is provided with bilateral rack bar 19, and worm screw 16 drives snail when rotating
Wheel 17 rotation, symmetrically arranged two worm gears 17 turn to it is identical, so as to make the steering of partial gear 18 identical, upper end it is endless
All gear 18 rotates clockwise, and position with teeth makes bilateral rack bar 19 want to move left when being engaged with bilateral rack bar 19, at this time
The partial gear 18 of lower end equally rotates clockwise, and position with teeth and the bar shaped tooth on bilateral rack bar 19 are separate, instantly
The position with teeth of the partial gear 18 at end drives bilateral rack bar 19 to there is movement when being engaged with bilateral rack bar 19, at this time on
The position with teeth of the partial gear 18 at end and bilateral rack bar 19 are separate, so as to fulfill past renaturation of bilateral rack bar 19 or so
It is mobile；The right end of the chisel stone chamber 10 is communicated with cylinder chamber 32, and the left end of cylinder chamber 32 is installed with fixed block 20, bilateral tooth
Bar 19 is fixedly connected through fixed block 20 and with rock drilling drill rod 31, and the left end of rock drilling drill rod 31 is installed with rock drilling head 14,
Rock drilling drill rod 31 and rock drilling head 14 is driven to move left and right when bilateral rack bar 19 moves left and right, so as to carry out place of punchinging to rock
Reason；Movable plate 22 is also installed on the rock drilling drill rod 31, movable plate 22, which is slidably connected at, is set to 32 inside of cylinder chamber
Sliding slot 31 on, and movable plate 22 is connect by buffer spring 21 with fixed plate 20, and buffer spring 21 plays cushioning effect.
The dust-falling mechanism includes dust hood 15, piston cylinder 12 and turntable 26, and dust hood 15 is in horn-like and dust hood 15
Left end connected by elastic telescopic pipe with cylinder chamber 32, dust hood 15 can effectively prevent the dust dispersion generated during rock drilling
It is unfavorable for handling, the outside of dust hood 15 is communicated with conduit, the other end of conduit and the work for being fixedly mounted on 10 lower end of chisel stone chamber
Plug cylinder 12 connects, and check valve is provided in conduit, and the downside right end of piston cylinder 12 is connected by the right end of conduit and dust suction water tank 2
It is logical, check valve is again provided in conduit；It is slided in the piston cylinder 12 and is provided with piston 13, piston 13 is fixed with catch bar 28
Connection, catch bar 18 run through the left wall of piston cylinder 12 and are hinged with connecting rod 27, and the other end of connecting rod 27 is rotatably connected on
At the eccentric position of disk 26, catch bar 28 is driven to move left and right by connecting rod 27 when turntable 26 rotates, catch bar 28, which drives, lives
Plug 13 moves left and right, so as to fulfill the process pumped；Bevel gear D30 is installed in the rear end shaft of the turntable 26, is bored
Gear D 30 is engaged with bevel gear C29, and the shaft upper end of bevel gear C29 is fixedly connected with bevel gear B25, bevel gear B25 and fixation
Bevel gear A24 mounted on 16 left end of lower end worm screw is engaged, nibbling by bevel gear A24 and bevel gear B25 when worm screw 16 rotates
Cooperation band dynamic bevel gear C29 rotations, bevel gear C29 drive turntable 26 to rotate by the bevel gear D30 being engaged with.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (7)
1. a kind of have the function of the rock drilling device of depositing dust, including towing bracket（1）, dust suction water tank（2）, hoisting mechanism, bottom plate
（9）, knapping machine structure and dust-falling mechanism；It is characterized in that, the bottom plate（9）Upside left end be installed with towing bracket（1）,
Towing bracket（1）Right side is provided with dust suction water tank（2）, hoisting mechanism is arranged on dust suction water tank（2）Right end；The knapping machine structure
Including digging stone chamber（10）, the second motor（11）And cylinder chamber（32）, dig stone chamber（10）Inside is symmetrically installed with worm screw（16）, upper end
Worm screw（16）Across chisel stone chamber（10）Right wall and pass through belt and the second motor（11）Output shaft rotation connection, two snails
Bar（16）Left end be rotatablely connected by belt, worm screw（16）Inside be provided with worm gear（17）, worm gear（17）Shaft front end
With partial gear（18）It is fixedly connected, partial gear（18）Inside be provided with bilateral rack bar（19）；The chisel stone chamber
（10）Right end be communicated with cylinder chamber（32）, cylinder chamber（32）Left end be installed with fixed block（20）, bilateral rack bar
（19）Through fixed block（20）And with rock drilling drill rod（31）It is fixedly connected, rock drilling drill rod（31）Left end be installed with rock drilling head
（14）；The dust-falling mechanism includes dust hood（15）, piston cylinder（12）And turntable（26）, dust hood（15）Outside be communicated with and lead
Pipe, the other end of conduit is with being fixedly mounted on chisel stone chamber（10）The piston cylinder of lower end（12）It connects, check valve is provided in conduit,
Piston cylinder（12）Downside right end pass through conduit and dust suction water tank（2）Right end connection, be again provided with check valve in conduit；Institute
State piston cylinder（12）Interior slip is provided with piston（13）, piston（13）With catch bar（28）It is fixedly connected, catch bar（18）Run through
Piston cylinder（12）Left wall and and connecting rod（27）It is hinged, connecting rod（27）The other end be rotatably connected on turntable（26）Bias
At position；The turntable（26）Rear end shaft on be installed with bevel gear D（30）, bevel gear D（30）With bevel gear C（29）
Engagement, bevel gear C（29）Shaft upper end and bevel gear B（25）It is fixedly connected, bevel gear B（25）With being fixedly mounted on lower end snail
Bar（16）The bevel gear A of left end（24）Engagement.
2. according to claim 1 have the function of the rock drilling device of depositing dust, which is characterized in that the bottom plate（9）Lower end pair
Title is provided with wheel（8）, wheel（8）On be provided with retaining mechanism.
3. according to claim 1 have the function of the rock drilling device of depositing dust, which is characterized in that first motor（4）For
Clockwise and anticlockwise motor.
4. according to claim 1 have the function of the rock drilling device of depositing dust, which is characterized in that the hoisting mechanism includes carrying
Rise chamber（3）, the first motor（4）, threaded rod（5）And movable block（6）, promote chamber（3）It is fixedly mounted on bottom plate（9）Upper end, and carry
Rise chamber（3）Inside is rotatably connected to threaded rod（5）, threaded rod（5）Upper end through promoted chamber（3）Upper end and with the first motor
（4）Output shaft be fixedly connected.
5. according to claim 4 have the function of the rock drilling device of depositing dust, which is characterized in that the threaded rod（5）Upper spiral shell
Line is connected with movable block（6）, movable block（6）With movable support（7）It is fixedly connected, movable support（7）Through promotion chamber（3）Right end
It the straight slot of setting and is fixedly connected with knapping machine structure.
6. according to claim 1 have the function of the rock drilling device of depositing dust, which is characterized in that the rock drilling drill rod（31）On
Also it is installed with movable plate（22）, movable plate（22）It is slidably connected at and is set to cylinder chamber（32）The sliding slot of inside（31）On,
And movable plate（22）Pass through buffer spring（21）With fixed plate（20）Connection.
7. according to claim 1 have the function of the rock drilling device of depositing dust, which is characterized in that the dust hood（15）In loudspeaker
Shape and dust hood（15）Left end pass through elastic telescopic pipe and cylinder chamber（32）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810003367.7A CN108179979A (en) | 2018-01-03 | 2018-01-03 | It is a kind of that there is the rock drilling device of depositing dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810003367.7A CN108179979A (en) | 2018-01-03 | 2018-01-03 | It is a kind of that there is the rock drilling device of depositing dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108179979A true CN108179979A (en) | 2018-06-19 |
Family
ID=62549891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810003367.7A Pending CN108179979A (en) | 2018-01-03 | 2018-01-03 | It is a kind of that there is the rock drilling device of depositing dust |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108179979A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867526A (en) * | 2018-07-24 | 2018-11-23 | 卢若望 | A kind of double-piston crank type device for reducing dust |
| CN108979706A (en) * | 2018-07-02 | 2018-12-11 | 王世华 | A kind of mine adsorption air device for reducing dust |
| CN109024212A (en) * | 2018-08-17 | 2018-12-18 | 南京奥新可工程科技有限公司 | A kind of small-sized crushing device of town road with depositing dust function |
| CN109162655A (en) * | 2018-11-06 | 2019-01-08 | 史振荣 | A kind of rock drill with dust reduction capability |
| CN109331590A (en) * | 2018-11-12 | 2019-02-15 | 山东省田庄煤矿有限公司 | A kind of negative pressure suspension dust-extraction unit |
| CN110821479A (en) * | 2019-11-14 | 2020-02-21 | 西南石油大学 | Underground traction device for avoiding pressure difference to meet clamping in cable logging |
| CN111911069A (en) * | 2019-05-07 | 2020-11-10 | 徐州维尔德科技发展有限公司 | Linear electric rock drilling device |
| CN112227727A (en) * | 2020-10-15 | 2021-01-15 | 中建四局第三建设有限公司 | A firm concrete ground levelly and smoothly installs for building site |
| CN113521932A (en) * | 2021-09-15 | 2021-10-22 | 东营思达石油化工有限公司 | Wet-type clarification plant is used in petroleum refining |
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| CN207829804U (en) * | 2018-01-03 | 2018-09-07 | 北京瑞威世纪铁道工程有限公司 | A kind of rock drilling device with depositing dust function |
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| JP2003239670A (en) * | 2002-02-18 | 2003-08-27 | Fujio Takehara | Chain rotation automatic rock drill |
| CN201057045Y (en) * | 2007-06-20 | 2008-05-07 | 王新民 | Multi-bit rock drill |
| CN102383727A (en) * | 2011-09-12 | 2012-03-21 | 山东科技大学 | Drilling machine special for one-step well drilling and working method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108979706A (en) * | 2018-07-02 | 2018-12-11 | 王世华 | A kind of mine adsorption air device for reducing dust |
| CN108867526A (en) * | 2018-07-24 | 2018-11-23 | 卢若望 | A kind of double-piston crank type device for reducing dust |
| CN109024212A (en) * | 2018-08-17 | 2018-12-18 | 南京奥新可工程科技有限公司 | A kind of small-sized crushing device of town road with depositing dust function |
| CN109162655A (en) * | 2018-11-06 | 2019-01-08 | 史振荣 | A kind of rock drill with dust reduction capability |
| CN109331590A (en) * | 2018-11-12 | 2019-02-15 | 山东省田庄煤矿有限公司 | A kind of negative pressure suspension dust-extraction unit |
| CN109331590B (en) * | 2018-11-12 | 2021-07-13 | 山东省田庄煤矿有限公司 | Negative pressure suspension dust collector |
| CN111911069A (en) * | 2019-05-07 | 2020-11-10 | 徐州维尔德科技发展有限公司 | Linear electric rock drilling device |
| CN110821479A (en) * | 2019-11-14 | 2020-02-21 | 西南石油大学 | Underground traction device for avoiding pressure difference to meet clamping in cable logging |
| CN110821479B (en) * | 2019-11-14 | 2022-04-22 | 西南石油大学 | Underground traction device for avoiding pressure difference to meet clamping in cable logging |
| CN112227727A (en) * | 2020-10-15 | 2021-01-15 | 中建四局第三建设有限公司 | A firm concrete ground levelly and smoothly installs for building site |
| CN113521932A (en) * | 2021-09-15 | 2021-10-22 | 东营思达石油化工有限公司 | Wet-type clarification plant is used in petroleum refining |
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Application publication date: 20180619 |
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