CN106065781B - A kind of gas drainage under suction injection hole sealing device and method for sealing - Google Patents
A kind of gas drainage under suction injection hole sealing device and method for sealing Download PDFInfo
- Publication number
- CN106065781B CN106065781B CN201610486675.0A CN201610486675A CN106065781B CN 106065781 B CN106065781 B CN 106065781B CN 201610486675 A CN201610486675 A CN 201610486675A CN 106065781 B CN106065781 B CN 106065781B
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- Prior art keywords
- cylinder
- sealing
- hole
- injection hole
- under suction
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- 238000007789 sealing Methods 0.000 title claims abstract description 62
- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000011083 cement mortar Substances 0.000 claims abstract description 14
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 238000007569 slipcasting Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 210000005069 ears Anatomy 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses a kind of gas drainage under suction injection hole sealing device and method for sealing, including agitator and grouting cylinder, the agitator discharging opening is connected to grouting cylinder charging aperture by pipeline, and the grouting cylinder is connected with drive cylinder, and it is exported is connected to injected hole by pipeline.The present invention is mixed cement mortar by agitator, cement mortar is injected at sealing of hole by grouting cylinder, realize the sealing of hole at gas exhaust, substantially increase injection hole sealing efficiency, operating personnel greatly reduce, and labor intensity is low, more time saving and energy saving, injection hole sealing is safer, and the present invention also has the characteristics of simple in construction, cost is low, quick and maintenance cost easy to maintenance substantially reduces.
Description
Technical field
The present invention relates to a kind of gas drainage under suction injection hole sealing device and method for sealing, belong to gas drainage hole sealing device technology
Field.
Background technology
, need to be to the hole between gas drainage under suction pipe outer wall and drilling inwall in mash gas pumping drilling stringing work progress
Gap, carries out injection hole sealing construction in the certain limit in from exit to drilling, when existing equipment carries out slip casting, it is necessary to
Operating personnel it is more, labor intensity is big, wastes time and energy, and sealing of hole efficiency is low, and injection hole sealing security is worse.
The content of the invention
The technical problem to be solved in the present invention is：A kind of gas drainage under suction injection hole sealing device and method for sealing, slip casting are provided
Sealing of hole efficiency high, operating personnel greatly reduce, and labor intensity is low, more time saving and energy saving, and injection hole sealing is safer, existing to solve
There is problem present in technology.
The technical scheme that the present invention takes is：A kind of gas drainage under suction injection hole sealing device, including agitator and grouting cylinder, institute
State agitator discharging opening and grouting cylinder charging aperture is connected to by pipeline, the grouting cylinder is connected with drive cylinder, and its outlet passes through
Pipeline is connected to injected hole.
Preferably, above-mentioned agitator includes staving and the stirrer blade being placed in staving, and the stirrer blade is connected by rotary shaft
It is connected on hydraulic motor, the hydraulic motor is arranged on upper axle bed, and the upper axle bed is fixedly connected in the middle part of supporting plate, described
Supporting plate both ends are fixedly mounted on staving top, and ensure that hydraulic motor is located above staving center, and are provided with charging aperture
Two.
Preferably, above-mentioned stirrer blade includes the paddle and connection strap of spiral, and the paddle is the cylinder for including upper end
Cone segments under section and cylindrical section, rotary shaft is connected to by a plurality of evenly spaced connection strap.
Preferably, above-mentioned rotary shaft upper end is separably connected to the motor axle sleeve of rotation, and lower end can be revolved by lower spindle nose
It is connected on lower axle bed with turning, the motor axle sleeve is rotatably inserted into by the output shaft of key connection to hydraulic motor
In upper axle bed.
Preferably, it is provided with screen pack at above-mentioned charging aperture.
Preferably, it is provided with symmetrical handrail on the above-mentioned lateral wall of staving two.
Preferably, it is provided with copper sheathing between lower spindle nose and lower axle bed between said motor axle sleeve and upper axle bed.
Preferably, above-mentioned grouting cylinder includes cylinder body and piston, and the piston is placed in cylinder body, and is directly connected to hydraulic cylinder
Lever, the cylinder body both ends are both provided with charging aperture one and discharging opening, and alternately check valve, discharging opening are arranged on charging aperture one
On be provided with back liquid short valve, the cylinder barrel of cylinder body and hydraulic cylinder is fixedly connected in supporting table.
Preferably, above-mentioned supporting table includes bottom plate and is fixedly connected on the side plate of side before and after bottom plate, fixed between biside plate to set
The polylith supporting plate of perpendicular side plate is equipped with, its left end is provided with the ears seat of connection liquid cylinder pressure, and its right-hand member is provided with connection cylinder body
Flange, be arc groove in the middle part of the polylith supporting plate.
Preferably, it is also associated with pressing the pressing plate of cylinder body and cylinder barrel in above-mentioned supporting plate.
A kind of method for sealing of gas drainage under suction injection hole sealing device, this method comprise the following steps：
（1）Gas exhaust pipe at sealing of hole is placed among hole, device to hole is interior to be set from sealing of hole mouth 15m by Ma Lisan injection
Remarks enter the thick Ma Lisan layers of 0.5-1m；
（2）It is 1 by ratio：1：0.5 cement, sandstone and water is added in agitator, is mixed cement sand by agitator
Slurry, cement mortar granularity are not more than 20mm；
（3）It is to be mixed uniformly after, start pumping plant and two-way operation carried out to hydraulic cylinder, drive grouting cylinder two-stroke work back and forth
Make；
（4）By the two-way slip casting of grouting cylinder, cement mortar is injected into sealing of hole；
（5）When the cement mortar in sealing of hole is from sealing of hole mouth 1m, stop slip casting；
（6）The thick Ma Lisan layers of 1m were injected after 30 minutes at sealing of hole mouth.
Beneficial effects of the present invention：Compared with prior art, effect of the invention is as follows：
（1）The present invention is mixed cement mortar by agitator, and cement mortar is injected at sealing of hole by grouting cylinder, is realized
Sealing of hole at gas exhaust, injection hole sealing efficiency is substantially increased, operating personnel greatly reduce, and labor intensity is low, more time saving
Laborsaving, injection hole sealing is safer, the present invention also have simple in construction, cost is low, easy to maintenance quick and maintenance cost significantly
The characteristics of reduction；
（2）It is stirred by fluid motor-driven stirrer blade, stirring is more time saving and energy saving, and stirring efficiency greatly improves,
Operating efficiency also greatly improves, and stirring is more uniform, and sealing of hole effect is more preferable；
（3）Moved back and forth by Driven by Hydraulic Cylinder piston in cylinder body, feed and discharge using both-end on cylinder body, realized double
The work of journey, slip casting efficiency is substantially increased, automatic shutter is realized using check valve, it is simple to operate, it is more time saving and energy saving, also subtract
Few sealing of hole personnel and labor strength, improve 3-6 times of efficiency；
（4）The present invention can allow sealing of hole effect more preferable, sealing of hole using the hole sealing structure of two Ma Lisan layers pincer attack cement sand bed
Cost is lower.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the overall structure diagram of the present invention；
Fig. 3 is the agitator structural representation of the present invention；
Fig. 4 is the agitator overlooking the structure diagram of the present invention；
Fig. 5 is the close-up schematic view in Fig. 3；
Fig. 6 is the structure of shaft sleeve of motor schematic diagram in Fig. 3；
Fig. 7 is the overlooking the structure diagram in Fig. 6；
Fig. 8 is the upper shaft head structure schematic diagram in Fig. 3；
Fig. 9 is the overlooking the structure diagram in Fig. 6；
Figure 10 is the grouting cylinder structural representation of the present invention；
Figure 11 is the pressing plate side structure schematic view in Figure 10.
Embodiment
Below in conjunction with the accompanying drawings and the present invention is described further specific embodiment.
Embodiment 1：As Figure 1-Figure 11, a kind of gas drainage under suction injection hole sealing device, including agitator 1 and grouting cylinder 2,
The discharging opening of agitator 1 is connected to the charging aperture of grouting cylinder 2 by pipeline, and grouting cylinder 2 is connected with drive cylinder 3, and its outlet passes through pipe
Road is connected to injected hole 4, and drive cylinder 3 is connected to pumping plant 5.
Preferably, above-mentioned agitator 1 includes staving 101 and the stirrer blade 102 being placed in staving 101, and stirrer blade 102 passes through
Hollow rotary shaft 103 is connected on hydraulic motor 104, and hydraulic motor 104 is arranged on upper axle bed 105, and upper axle bed 105 is fixed
The middle part of supporting plate 106 is connected to, the both ends of supporting plate 106 are fixedly mounted on the ring flange 120 on the top of staving 101, and ensure liquid
Pressure motor 104 is located above the center of staving 101, and is provided with charging aperture 2 110, and hydraulic motor 104 is connected to pumping plant 5, goes out
Material mouth 117 is arranged on the bottom of staving 101, and ring flange 120 is provided with reinforcement 121.
Preferably, above-mentioned stirrer blade 102 includes the paddle 107 and connection strap 108 of spiral, and the paddle 107 is bag
The cone segments under the cylindrical section and cylindrical section of upper end are included, rotary shaft 103 is connected to by a plurality of evenly spaced connection strap 108,
The lower end of staving 101 is arranged to pyramidal structure, and the pitch of the paddle 107 of spiral is 300mm, thickness of slab 4-6mm, cylindrical section stirring
The spiral external diameter of leaf 107 is 570mm, and internal diameter 480mm, the short spiral internal diameter of conical section is identical with cylindrical section, outside small end spiral
Footpath is 240mm, internal diameter 150mm, the pitch of axially extending about half, connection strap 108 use thickness for 4-6mm thickness,
The steel plate that width is 45mm makes, and the axially spaced-apart of a plurality of connection strap 108 is 75mm, is uniformly distributed on spiral circumference.
Preferably, the above-mentioned upper end of rotary shaft 103 is separably connected to the motor axle sleeve 109 of rotation by upper spindle nose 122,
Lower end is rotatably connected on lower axle bed 112 by lower spindle nose 111, and motor axle sleeve 109 is connected to hydraulic motor by key 113
104 output shaft, and be rotatably inserted into axle bed 105, the upper upper surface of spindle nose 22 is provided with two set around its axle center
Symmetrical sector is raised and sets two sector notch between two fan-shaped projections, and the lower end of motor axle sleeve 112 is similarly provided with two pairs
The sector of title is raised and two sector notch, fan-shaped raised and sector notch and the motor drive shaft of upper spindle nose are set between two fan-shaped projections
Set 112 sector notch and fan-shaped projection inlay realize it is detachably connectable, can also the upper upper center of spindle nose 122 set position
Axle, fast and easy location and installation.
Preferably, screen pack 114 is provided with above-mentioned charging aperture 110, oversized particles can be filtered out, kept away by screen pack
Exempt from the blocking of pipeline.
Preferably, symmetrical handrail 115 is provided with above-mentioned 101 liang of lateral walls of staving, it is convenient by agitator by handrail
Carried and moved, staving 101 is arranged with the supporting leg 118 that four angle steel make, and four supporting legs 118 pass through reinforcing ring
Connection, the bottom of supporting leg 118 are provided with supporting plate, improve Area of bearing, ensure stability of strutting system.
Preferably, it is provided with copper sheathing between lower spindle nose 111 and lower axle bed 112 between said motor axle sleeve 109 and upper axle bed 105
116, copper sheathing has wear-resisting characteristic, it is possible to increase the service life of equipment.
Preferably, above-mentioned grouting cylinder 2 includes cylinder body 201 and piston 202, and piston 202 is placed in cylinder body 201, and is directly connected
The lever 205 of hydraulic cylinder 204 is connected to, the both ends of cylinder body 201 are both provided with charging aperture 1 and discharging opening 207, charging aperture 1
On be arranged at alternately check valve 208, the cylinder barrel of liquid short valve 209, cylinder body 201 and hydraulic cylinder 204 is provided with back on discharging opening 207
210 are fixedly connected in supporting table 211.
Preferably, above-mentioned supporting table 211 includes bottom plate 212 and is fixedly connected on the side plate 213 of side before and after bottom plate 212, and two
The polylith supporting plate 214 of perpendicular side plate 213 is fixedly installed between side plate 213, its left end is provided with the ears of connection liquid cylinder pressure 204
Seat 215, its right-hand member are provided with the flange 216 of connection cylinder body 201, and support table structure is simple, easy to make, and cost is low, ears seat
Connected with flange reliably, the middle part of polylith supporting plate 214 is arc groove, is limited cylinder body and cylinder barrel by enough in arc groove
Position, connection are placed more reliable and more firm.
Preferably, it is also associated with pressing the pressing plate 217 of cylinder body 201 and cylinder barrel 210 in above-mentioned supporting plate 214, passes through pressing plate
Cylinder body and cylinder barrel can be reinforced onto supporting table, use is more firm.
Embodiment 2：A kind of method for sealing of gas drainage under suction injection hole sealing device, this method comprise the following steps：
（1）Gas exhaust pipe at sealing of hole is placed among hole, device to hole is interior to be set from sealing of hole mouth 15m by Ma Lisan injection
Remarks enter the thick Ma Lisan layers of 0.5-1m；
（2）It is 1 by ratio：1：0.5 cement, sandstone and water is added in agitator, is mixed cement sand by agitator
Slurry, cement mortar granularity are not more than 20mm；
（3）It is to be mixed uniformly after, start pumping plant to hydraulic cylinder carry out two-way operation, so as to drive grouting cylinder two-stroke back and forth
Work；
（4）By the two-way slip casting of grouting cylinder, cement mortar is injected into sealing of hole；
（5）When the cement mortar in sealing of hole is from sealing of hole mouth 1m, stop slip casting；
（6）The thick Ma Lisan layers of 1m were injected after 30 minutes at sealing of hole mouth.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (8)
- A kind of 1. gas drainage under suction injection hole sealing device, it is characterised in that：Including agitator（1）And grouting cylinder（2）, the agitator （1）Discharging opening is connected to grouting cylinder by pipeline（2）Charging aperture, the grouting cylinder（2）It is connected with drive cylinder（3）, it is exported Injected hole is connected to by pipeline（4）, the grouting cylinder（2）Including cylinder body（201）And piston（202）, the piston（202）Put In cylinder body（201）It is interior, and it is directly connected to hydraulic cylinder（204）Lever（205）, the cylinder body（201）Both ends be both provided with into Material mouth one（206）And discharging opening（207）, charging aperture one（206）On be arranged at alternately check valve（208）, discharging opening（207）On set It is equipped with back liquid short valve（209）, cylinder body（201）And hydraulic cylinder（204）Cylinder barrel（210）It is fixedly connected on supporting table（211）It is interior； The supporting table（211）Including bottom plate（212）Be fixedly connected on bottom plate（212）The side plate of front and rear side（213）, biside plate （213）Between be fixedly installed perpendicular side plate（213）Polylith supporting plate（214）, its left end is provided with connection liquid cylinder pressure（204）'s Ears seat（215）, its right-hand member is provided with connection cylinder body（201）Flange（216）, the polylith supporting plate（214）Middle part is arc Connected in star.
- A kind of 2. gas drainage under suction injection hole sealing device according to claim 1, it is characterised in that：The agitator（1）Bag Include staving（101）Be placed in staving（101）Interior stirrer blade（102）, the stirrer blade（102）Pass through rotary shaft（103）Connection To hydraulic motor（104）On, the hydraulic motor（104）Installed in upper axle bed（105）On, the upper axle bed（105）It is fixed to connect It is connected on supporting plate（106）Middle part, the supporting plate（106）Both ends are fixedly mounted on staving（101）Top, and ensure hydraulic motor （104）Positioned at staving（101）Above center, and it is provided with charging aperture two（110）.
- A kind of 3. gas drainage under suction injection hole sealing device according to claim 2, it is characterised in that：The stirrer blade（102） Paddle including spiral（107）And connection strap（108）, the paddle（107）It is the cylindrical section and cylindrical section for including upper end Under cone segments, pass through a plurality of evenly spaced connection strap（108）It is connected to rotary shaft（103）.
- A kind of 4. gas drainage under suction injection hole sealing device according to claim 2, it is characterised in that：The rotary shaft（103） Upper end is separably connected to the motor axle sleeve of rotation（109）, lower end passes through lower spindle nose（111）It is rotatably connected to lower axle bed （112）On, the motor axle sleeve（109）Pass through key（113）It is connected to hydraulic motor（104）Output shaft, it is and rotatably embedding Enter to upper axle bed（105）It is interior.
- A kind of 5. gas drainage under suction injection hole sealing device according to claim 2, it is characterised in that：The charging aperture two （110）Place is provided with screen pack（114）.
- A kind of 6. gas drainage under suction injection hole sealing device according to claim 4, it is characterised in that：The motor axle sleeve （109）With upper axle bed（105）Between and lower spindle nose（111）With lower axle bed（112）Between be provided with copper sheathing（116）.
- A kind of 7. gas drainage under suction injection hole sealing device according to claim 1, it is characterised in that：The supporting plate（214） On be also associated with press cylinder body（201）And cylinder barrel（210）Pressing plate（217）.
- 8. according to a kind of method for sealing of any described gas drainage under suction injection hole sealing devices of claim 1-7, it is characterised in that： This method comprises the following steps：（1）Gas exhaust pipe at sealing of hole is placed among hole, device to hole is interior to be noted from sealing of hole mouth 15m by Ma Lisan injection device Enter the thick Ma Lisan layers of 0.5-1m；（2）It is 1 by ratio：1：0.5 cement, sandstone and water is added in agitator, is mixed cement mortar by agitator, water Cement mortar granularity is not more than 20mm；（3）It is to be mixed uniformly after, start pumping plant to hydraulic cylinder carry out two-way operation, drive grouting cylinder back and forth two-stroke work；（4）By the two-way slip casting of grouting cylinder, cement mortar is injected into sealing of hole；（5）When the cement mortar in sealing of hole is from sealing of hole mouth 1m, stop slip casting；（6）The thick Ma Lisan layers of 1m were injected after 30 minutes at sealing of hole mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610486675.0A CN106065781B (en) | 2016-06-29 | 2016-06-29 | A kind of gas drainage under suction injection hole sealing device and method for sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610486675.0A CN106065781B (en) | 2016-06-29 | 2016-06-29 | A kind of gas drainage under suction injection hole sealing device and method for sealing |
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| Publication Number | Publication Date |
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| CN106065781A CN106065781A (en) | 2016-11-02 |
| CN106065781B true CN106065781B (en) | 2018-03-02 |
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Families Citing this family (1)
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| CN109162667B (en) * | 2018-10-11 | 2020-07-28 | 吕梁学院 | Coal mining double-liquid grouting device |
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|---|---|---|---|---|
| CN2224864Y (en) * | 1995-01-31 | 1996-04-17 | 陆信惠 | High pressure cement pump |
| CN202805411U (en) * | 2012-07-30 | 2013-03-20 | 浙江省宏途交通建设有限公司 | Automatic mud-jack all-in-one machine of prestressed aperture |
| CN203331228U (en) * | 2013-06-13 | 2013-12-11 | 新疆科立机械设备有限公司 | Powdery material homogenizing device |
| CN205047217U (en) * | 2015-08-12 | 2016-02-24 | 郑力会 | Simulation annular space flow state's leaking stoppage experimental apparatus |
| CN205936690U (en) * | 2016-06-29 | 2017-02-08 | 贵州盘江矿山机械有限公司 | Gas drainage under suction slip casting hole sealing device |
-
2016
- 2016-06-29 CN CN201610486675.0A patent/CN106065781B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2224864Y (en) * | 1995-01-31 | 1996-04-17 | 陆信惠 | High pressure cement pump |
| CN202805411U (en) * | 2012-07-30 | 2013-03-20 | 浙江省宏途交通建设有限公司 | Automatic mud-jack all-in-one machine of prestressed aperture |
| CN203331228U (en) * | 2013-06-13 | 2013-12-11 | 新疆科立机械设备有限公司 | Powdery material homogenizing device |
| CN205047217U (en) * | 2015-08-12 | 2016-02-24 | 郑力会 | Simulation annular space flow state's leaking stoppage experimental apparatus |
| CN205936690U (en) * | 2016-06-29 | 2017-02-08 | 贵州盘江矿山机械有限公司 | Gas drainage under suction slip casting hole sealing device |
Non-Patent Citations (1)
| Title |
|---|
| 穿层瓦斯抽采钻孔封孔材料优化研究;孙朝芦;《煤炭技术》;20151210;第34卷(第12期);正文第1-2章，附图1-5 * |
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| CN106065781A (en) | 2016-11-02 |
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