CN106194190B - A kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula - Google Patents
A kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula Download PDFInfo
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- CN106194190B CN106194190B CN201610759364.7A CN201610759364A CN106194190B CN 106194190 B CN106194190 B CN 106194190B CN 201610759364 A CN201610759364 A CN 201610759364A CN 106194190 B CN106194190 B CN 106194190B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 235000020610 powder formula Nutrition 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 125000006850 spacer group Chemical group 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 description 12
- 239000003245 coal Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000002817 coal dust Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C45/00—Methods of hydraulic mining; Hydraulic monitors
- E21C45/02—Means for generating pulsating fluid jets
- E21C45/04—Means for generating pulsating fluid jets by use of highly pressurised liquid
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Earth Drilling (AREA)
Abstract
A kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula,Including the drill bit outer wall body of rod with auger and connect with the body of rod,There is the central passage to circulate for flow in the body of rod,Body of rod tail end is equipped with the fluid jet nozzle of multiple penetrating rod body sidewalls,Body of rod both ends are both provided with female connector,Central passage tail portion is provided with annular stop protrusion with female connector joint,The body of rod is connect by a rod-shaped connector with central through hole with drill bit,Connection tail end is threadedly coupled with body of rod head end,And it connects in the central through hole of tail end and is provided with the check valve entered for flow one-way flow in drill bit,Connector head end is plugged in by rod-shaped interconnecting piece in drill bit,And it is provided with strainer in the central through hole of connector head end,Rod-shaped interconnecting piece side wall is provided with the spacer pin for fixed drill bit,The body of rod is provided with high-low pressure flow switching mechanism in the central passage between connector and annular stop protrusion.Device of the present invention, it is simple in structure, it is efficient.
Description
Technical field
The present invention relates to downhole coal mine machinery equipment field, specially a kind of high-low pressure water that can be unidirectionally filtered from row's powder formula
Flow automatic conversion water knife.
Background technology
With the increase of coal bed drilling depth, the stress between coal seam also gradually increases, the gas that common small drill bit is beaten
Extraction hole is easy to be gone back by the stress extruding between coal seam, greatly reduces the efficiency of gas drainage under suction.Waterpower drilling technique is certainly
It is just gradually applied in seam mining up to now after being found the eighties in last century.But due to waterpower bore operation
Mode needs to extract on drilling rod in punching, changes punching apparatus into, could realize hydraulic flushing in hole.These equipment are mostly more stupid
Weight, attachment is more, and whens complex procedures and secondary importing drilling rod can import not smooth caused by the reasons such as collapse hole, seriously affect gas
Extraction works, and causes the low labor intensity of drilling efficiency and increases, the harmful effect of the various aspects such as downhole production efficiency.
Invention content
In order to solve the problems, such as above-mentioned hydraulic flushing in hole operation, the present invention proposes one kind can unidirectional mistake from row's powder formula
The high-low pressure flow automatic conversion water knife of filter, it is simple in structure, it is convenient for changing, can arrange powder automatically in drilling, pass through high-low pressure
Conversion can be achieved with drilling with it is hole-punching integrated, while solving to drill and countercurrently be asked with the coal water occurred often in punch process
Topic.
The technical solution that the present invention is taken to solve the above-mentioned problems is：A kind of height that can be unidirectionally filtered from row's powder formula
Flow automatic conversion water knife is pressed, including the drill bit that outer wall carries the body of rod of auger and connect with the body of rod, has in the body of rod and supply water
The central passage of circulation, tail end of the body of rod along punching direction are placed in penetrating in central passage equipped with multiple penetrating rod body sidewalls
Nozzle is flowed, body of rod both ends are both provided with female connector, and central passage tail portion is provided with annular stop protrusion, institute with female connector joint
The body of rod to be stated to connect with drill bit by a rod-shaped connector with central through hole, connection tail end is threadedly coupled with body of rod head end,
And connect in the central through hole of tail end and be fixedly installed the check valve entered for flow one-way flow in drill bit, connector head end passes through
The rod-shaped interconnecting piece at the end is plugged in drill bit, and strainer is provided in the central through hole of connector head end, rod-shaped interconnecting piece side
Wall is provided with the spacer pin for fixed drill bit, is arranged in central passage of the body of rod between connector and annular stop protrusion
There is high-low pressure flow switching mechanism；
The high-low pressure flow switching mechanism includes that piston cylinder and sliding are plugged in piston valve in piston cylinder, piston cylinder
It is along the sealing of punching direction head end, the open cylinder of tail end with piston valve, piston cylinder tail portion side wall offers and fluid jet nozzle
The high-pressure jet hole being mutually communicated；Low pressure water flow channel, the side wall of piston cylinder are formed between the cylinder and central passage of piston cylinder
The low pressure water flow through-hole I being connected to low pressure water flow channel is offered, the side wall of piston valve offers low pressure water flow through-hole II, piston
Valve is connect by the way that the elastic component in piston cylinder cylinder is arranged with the bottom wall of piston cylinder sealed end, and in elastic component nature
Under, low pressure water flow through-hole II is mutually communicated with low pressure water flow through-hole I, and the valve wall end seal high-pressure jet hole of piston valve, and
When hydraulic pressure increases, piston valve Forward compression elastic piece rear enclosed low pressure water flow through-hole II opens high-pressure jet hole.
It is provided with for fixing check valve and can lead to preferably, being located in the central through hole at check valve both sides
Cross the baffle and baffle ring of flow.
Preferably, the check valve by with a trapezoidal hole one-way valve seat and the steel that is arranged in trapezoidal hole
Ball is constituted, and the big opening end of trapezoidal hole is arranged towards punching direction, and trapezoidal hole is connected with central through hole and central passage.
Preferably, the piston cylinder head end is sealed by silk plug.
Preferably, the both ends of the piston cylinder all have and the matched Connection protrusion of central passage internal diameter, piston cylinder
Cylinder external diameter between two Connection protrusions is less than central passage internal diameter, and low pressure water flow through-hole I is arranged in piston cylinder cylinder
At the position of upper adjacent pistons cylinder tail end Connection protrusion, high-pressure jet hole is arranged in the Connection protrusion of piston cylinder tail end.
Preferably, being provided in the drill bit and the central passage in the body of rod and the central through hole phase in connector
The cavity for cooling of perforation.
Preferably, being provided with the limit stop ring for limiting piston valve position at the open end of the piston cylinder.
Preferably, between the piston cylinder both ends and central passage, between piston valve both ends and piston cylinder and even
Be in contact between the connector head end and drill bit position of connection is both provided with sealing ring.
Preferably, the connector is hexagonal structure.
Compared with prior art, the invention has the advantages that：
First, a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula of the present invention, with water
Pressure as the high-low pressure flow switching mechanism of power can make switching valve integrate drill, punching, realize that drilling and punching are integrated
Change, solves to drill to convert with punching in conventional equipment and replace that spare and accessory parts are more, labor intensity is big, inefficiency ask
Topic, and simple in structure, when operation, only needs to change water flow pressure, and operation is extremely convenient.
Second, a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula of the present invention, connection
Connecting and fixing for drill bit is realized by spacer pin between head and drill bit, greatlies simplify the dismounting process of drill bit in use, is solved
The difficult problem of drill bit of having determined dismounting, and connector between its hexagonal structure and drill bit by transmitting torque, it is more efficient.
Third, a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula of the present invention, valve body
Coal dust can be automatically drained out by the auger of outer wall in the case where water knife works bore state along the hand of spiral of auger, and coal dust is avoided to exist
Accumulation in drilling.
4th, a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula of the present invention, flow
By being flowed in coal bed drilling after drill bit, flow is mixed to form coal slime with coal dust, and check valve can effectively prevent coal slime adverse current
It enters in connector, ensures the normal work of high-low pressure flow switching mechanism.
Description of the drawings
Fig. 1 is a kind of structural representation for the high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula of the present invention
Figure；
Fig. 2 is a kind of structure of the body of rod from the high-low pressure flow automatic conversion water knife that row's powder formula can be filtered unidirectionally of the present invention
Schematic diagram；
Fig. 3 is a kind of high-low pressure flow from the high-low pressure flow automatic conversion water knife that row's powder formula can be filtered unidirectionally of the present invention
The structural schematic diagram of switching mechanism；
Fig. 4 is a kind of knot of the connector from the high-low pressure flow automatic conversion water knife that row's powder formula can be filtered unidirectionally of the present invention
Structure schematic diagram；
Fig. 5 is a kind of structure of the drill bit from the high-low pressure flow automatic conversion water knife that row's powder formula can be filtered unidirectionally of the present invention
Schematic diagram；
It is marked in figure：1, the body of rod, 101, fluid jet nozzle, 102, female connector, 2, annular stop protrusion, 3, connector, 301,
Spacer pin, 302, central through hole, 303, baffle, 4, piston cylinder, 401, high-pressure jet hole, 402, low pressure water flow through-hole I, 403, even
Connect protrusion, 5, piston valve, 501, low pressure water flow through-hole II, 6, elastic component, 7, low pressure water flow channel, 8, drill bit, 801, cavity, 9,
Check valve, 901, one-way valve seat, 902, steel ball, 10, strainer, 11, silk plug, 12, limit stop ring, 13, sealing ring.
Specific implementation mode
Elaborate to the present invention with reference to specific embodiment, the present embodiment based on the technical solution of the present invention,
Give detailed embodiment and specific operating process.
As shown, the present invention is a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula, including
The body of rod 1 and the drill bit 8 that with the body of rod 1 connect of the outer wall with auger, with the central passage to circulate for flow, bar in the body of rod 1
Tail end of the body 1 along punching direction is placed in the fluid jet nozzle 101 in central passage, 1 liang of the body of rod equipped with multiple through 1 side wall of the body of rod
End is both provided with female connector 102, and central passage tail portion is provided with annular stop protrusion 2, the body of rod with 102 joint of female connector
1 is connect by a rod-shaped connector 3 with central through hole 302 with drill bit 8, and 3 tail end of connector connects with 1 head end screw thread of the body of rod
It connects, and is fixedly installed the check valve 9 entered for flow one-way flow in drill bit 8 in the central through hole 302 of 3 tail end of connector, connect
First 3 head end is plugged in by the rod-shaped interconnecting piece at the end in drill bit 1, and is provided with filter in the central through hole 302 of 3 head end of connector
Net 10, rod-shaped interconnecting piece side wall are provided with the spacer pin 301 for fixed drill bit 8, and the body of rod 1 is located at connector 3 and annular stop
It is provided with high-low pressure flow switching mechanism in central passage between protrusion 2；
The high-low pressure flow switching mechanism includes piston cylinder 4 and slides the piston valve 5 being plugged in piston cylinder 4, living
Plug tube 4 is along the sealing of punching direction head end, the open cylinder of tail end with piston valve 5, and 4 tail portion side wall of piston cylinder is offered and penetrated
The high-pressure jet hole 401 that stream nozzle 101 is mutually communicated；Low pressure water flow channel is formed between the cylinder and central passage of piston cylinder 4
7, the side wall of piston cylinder 4 offers the low pressure water flow through-hole I 402 being connected to low pressure water flow channel 7, and the side wall of piston valve 5 opens up
There is a low pressure water flow through-hole II 501, piston valve 5 passes through the elastic component 6 and 4 sealed end of piston cylinder that are arranged in 4 cylinder of piston cylinder
Bottom wall connect, and elastic component 6 under natural conditions, low pressure water flow through-hole II 501 is mutually communicated with low pressure water flow through-hole I 402, and
The valve wall end seal high-pressure jet hole 401 of piston valve 5, and when hydraulic pressure increases, sealed after the Forward compression elastic piece 6 of piston valve 5
Low pressure water flow through-hole II 501 is closed, high-pressure jet hole 401 is opened.
It is the basic embodiment of the present invention above, can be improved further, optimizes or limit on the basis of above.
Further, in the central through hole 302 be located at 9 both sides of check valve at be provided with for fix check valve 9 and
The baffle 303 and limit stop ring 12 of flow can be passed through.
Further, the check valve 9 by with a trapezoidal hole one-way valve seat 901 and be arranged in trapezoidal hole
Steel ball 902 is constituted, and the big opening end of trapezoidal hole is arranged towards punching direction, and trapezoidal hole and central through hole 302 and center are logical
Road is connected.
Further, 4 head end of the piston cylinder is sealed by silk plug 11.
Further, the both ends of the piston cylinder 4 all have and the matched Connection protrusion 403 of central passage internal diameter, piston
Cylinder 4 is located at the cylinder external diameter between two Connection protrusions 403 and is less than central passage internal diameter, and low pressure water flow through-hole I 402 is arranged in work
On 4 cylinder of plug tube at the position of adjacent pistons cylinder tail end Connection protrusion 403, high-pressure jet hole 401 is arranged in piston cylinder tail end
In Connection protrusion 403.
Further, it is provided in the drill bit 8 and the central passage in the body of rod 1 and the central through hole in connector 3
302 cavitys 801 for cooling to connect.
Further, the limit stop ring 12 for limiting 5 position of piston valve is provided at the open end of the piston cylinder 4.
Further, between 4 both ends of the piston cylinder and central passage, between 5 both ends of piston valve and piston cylinder 4 and even
Be in contact between 3 head end of connector and drill bit 8 position of connection is both provided with sealing ring 13.
Further, the connector 3 is hexagonal structure, and connection 3 is turned round by being transmitted between its hexagonal structure and drill bit 8
Square, it is more efficient.
During normal drill, the flow velocity and pressure of water are relatively low, and flow first enters work through the central passage in the body of rod 1
Plug valve 5, at this time hydraulic pressure be not enough to compression elastic piece 6, the low pressure water flow of the low pressure water flow through-hole II 501 and piston cylinder 4 of piston valve 5
Through-hole I 402 is mutually communicated, and the valve wall end seal high-pressure jet hole 401 of piston valve 5, and entire coal cutting device is in low pressure water
Stream rinses the state of cooling, and flow successively flows into low pressure water flow channel after low pressure water flow through-hole II 501, low pressure water flow through-hole I 402
7, and be flowed into drill bit 8 by strainer 10 after low pressure water flow channel 7 is entered across check valve 9 in the through-hole of connector 3
Cavity 801 in, to drill bit 8 carry out waterpower cooling.
The principle of orifice restriction is used in drill bit cooling link：After flow is by strainer 10, flow encounters to narrow suddenly
Section, due to making the pressure of flow drastically decline there are resistance, corresponding to evaporating temperature also can accordingly decline, therefore liquid
It will evaporate at a lower temperature, the heat of evaporation process absorption itself, to be cooled down to drill bit 8.
During cave is made in punching, the pressure and flow velocity of increased water flow, flow first enter work through the central passage in the body of rod 1
The power of plug valve 5,5 gasket of piston valve of hydraulic pressure collision at this time is enough compression elastic piece 6, and elastic component 6 is shunk, and piston valve 5 moves forward, living
The low pressure water flow through-hole II 501 of plug valve 5 loses the state of perforation with the low pressure water flow through-hole I 402 of piston cylinder 4, closes flow
Preceding stand in channel, until the valve wall end of piston valve 5 is detached from sealing to high-pressure jet hole 401, at this point, high-pressure jet hole 401 and penetrating
The central passage of stream nozzle 101 and the body of rod 1 is in the state being mutually communicated, and the flow of high pressure by high-pressure jet hole 401 and is penetrated
Cave is made into horizontal high voltage punching to coal seam after stream nozzle 101.
During cave is made in high pressure punching, the path blockade of low pressure water flow, check valve 9 is without the promotion of flow, Jiu Huiguan
Closed walk prevents coal water from entering the use that inside cavity influences piston type stream commutator by 8 apopore of drill bit.
During drilling, the auger in 1 outside of the body of rod can be automatically drained out ore and coal dust, prevent it from influencing drilling
Efficiency.
Drill bit 8 and connector 3 are attached in a manner of spacer pin 301, connector 3 is hexagonal structure, passes through six sides
Structure transmits torque with drill bit 8, only needs to dismount spacer pin 301 by simple tool after the abrasion of drill bit 8, can be rapid
Complete the replacement of drill bit 8.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention is as above with preferred embodiment description, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when a little change or modification made using technology contents described above
It is the equivalent embodiment of equivalent variations, as long as being without departing from technical solution of the present invention content, according to the technical essence of the invention
To any simple modification, equivalent change and modification made by above example, in the range of still falling within technical solution of the present invention.
Claims (7)
1. a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula, including outer wall carry the body of rod of auger
（1）And the and body of rod（1）The drill bit of connection（8）, the body of rod（1）In there is the central passage that circulates for flow, the body of rod（1）Along punching
The tail end in direction is equipped with multiple through the body of rod（1）Side wall is placed in the fluid jet nozzle in central passage（101）, the body of rod（1）Both ends
It is both provided with female connector（102）, central passage tail portion and female connector（102）Joint is provided with annular stop protrusion（2）, special
Sign is：The body of rod（1）Central through hole is carried by one（302）Rod-shaped connector（3）With drill bit（8）Connection, the company
Connector（3）For hexagonal structure, connector（3）Tail end and the body of rod（1）Head end is threadedly coupled, and connector（3）The center of tail end is logical
Hole（302）In be fixedly installed and enter drill bit for flow one-way flow（8）In check valve（9）, connector（3）Head end passes through the end
Rod-shaped interconnecting piece is plugged in drill bit（8）In, and connector（3）The central through hole of head end（302）In be provided with strainer（10）, rod-shaped
Interconnecting piece side wall is provided with for fixed drill bit（8）Spacer pin（301）, the body of rod（1）Positioned at connector（3）It is convex with annular stop
It rises（2）Between central passage in be provided with high-low pressure flow switching mechanism；
The high-low pressure flow switching mechanism includes piston cylinder（4）And sliding is plugged in piston cylinder（4）Interior piston valve（5）,
Piston cylinder（4）With piston valve（5）It is along the sealing of punching direction head end, the open cylinder of tail end, piston cylinder（4）Tail portion side wall is opened
It is equipped with and fluid jet nozzle（101）The high-pressure jet hole being mutually communicated（401）；Piston cylinder（4）Cylinder and central passage between shape
At low pressure water flow channel（7）, piston cylinder（4）Side wall offer and low pressure water flow channel（7）The low pressure water flow through-hole I of connection
（402）, piston valve（5）Side wall offer low pressure water flow through-hole II（501）, piston valve（5）By being arranged in piston cylinder（4）Cylinder
Internal elastic component（6）With piston cylinder（4）The bottom wall of sealed end connects, and in elastic component（6）Under natural conditions, low pressure water circulates
Hole II（501）With low pressure water flow through-hole I（402）It is mutually communicated, and piston valve（5）Valve wall end seal high-pressure jet hole
（401）, and when hydraulic pressure increases, piston valve（5）Move forward compression elastic piece（6）Rear enclosed low pressure water flow through-hole II（501）, open
High-pressure jet hole（401）, the piston cylinder（4）Open end at be provided with for limiting piston valve（5）The limit stop ring of position
（12）.
2. a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula as described in claim 1, feature
It is：The central through hole（302）In be located at check valve（9）It is provided at both sides for fixing check valve（9）And can pass through
The baffle of flow（303）And limit stop ring（12）.
3. a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula as described in claim 1, feature
It is：The check valve（9）By the one-way valve seat with a trapezoidal hole（901）With the steel ball being arranged in trapezoidal hole
（902）It constitutes, the big opening end of trapezoidal hole is arranged towards punching direction, and trapezoidal hole and central through hole（302）And center is logical
Road is connected.
4. a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula as described in claim 1, feature
It is：The piston cylinder（4）Head end passes through silk plug（11）Sealing.
5. a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula as described in claim 1, feature
It is：The piston cylinder（4）Both ends all have and the matched Connection protrusion of central passage internal diameter（403）, piston cylinder（4）It is located at
Two Connection protrusions（403）Between cylinder external diameter be less than central passage internal diameter, low pressure water flow through-hole I（402）It is arranged in piston
Cylinder（4）Adjacent pistons cylinder tail end Connection protrusion on cylinder（403）Position at, high-pressure jet hole（401）It is arranged in piston cylinder tail
The Connection protrusion at end（403）On.
6. a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula as described in claim 1, feature
It is：The drill bit（8）It is inside provided with and the body of rod（1）Interior central passage and connector（3）Interior central through hole（302）Phase
The cavity for cooling of perforation（801）.
7. a kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula as described in claim 1, feature
It is：The piston cylinder（4）Between both ends and central passage, piston valve（5）Both ends and piston cylinder（4）Between and connector
（3）Head end and drill bit（8）Between the be in contact position of connection be both provided with sealing ring（13）.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610759364.7A CN106194190B (en) | 2016-08-30 | 2016-08-30 | A kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula |
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| CN201610759364.7A CN106194190B (en) | 2016-08-30 | 2016-08-30 | A kind of high-low pressure flow automatic conversion water knife that can be unidirectionally filtered from row's powder formula |
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| CN106194190B true CN106194190B (en) | 2018-10-30 |
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| CN106625272B (en) * | 2016-12-09 | 2019-03-08 | 重庆平步青云汽车配件有限公司 | A kind of working method of the cutting tool for rearview mirror |
| CN106640085B (en) * | 2017-02-07 | 2018-07-27 | 丰宁金龙黄金工业有限公司 | A kind of mining activities with can grooving giant |
| CN108979540B (en) * | 2018-08-15 | 2024-05-14 | 铁福来装备制造集团股份有限公司 | Mechanical hydrodynamic force combined reaming device |
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| US4440450A (en) * | 1982-08-18 | 1984-04-03 | Slurry Mining Engineering Inc. | Borehole mining valve actuation |
| SU1530772A1 (en) * | 1987-09-01 | 1989-12-23 | Московский Геологоразведочный Институт Им.Серго Орджоникидзе | Apparatus for drilling and hydraulic testing of wells |
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| Publication number | Publication date |
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| CN106194190A (en) | 2016-12-07 |
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Address after: 467000 South North Ring Road, Pingdingshan City, Henan Province (West of Xinhua Industrial Park) Patentee after: Tiefulai Equipment Manufacturing Group Co.,Ltd. Address before: 467000 South North Ring Road, Pingdingshan City, Henan Province (West of Xinhua Industrial Park) Patentee before: HENAN TIEFULAI EQUIPMENT MANUFACTURING Co.,Ltd. |
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