CN108050275A - A kind of block-resistant type hydraulic support atomizing de-dusting control valve - Google Patents
A kind of block-resistant type hydraulic support atomizing de-dusting control valve Download PDFInfo
- Publication number
- CN108050275A CN108050275A CN201711335387.6A CN201711335387A CN108050275A CN 108050275 A CN108050275 A CN 108050275A CN 201711335387 A CN201711335387 A CN 201711335387A CN 108050275 A CN108050275 A CN 108050275A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve chamber
- core head
- chamber
- block
- 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.)
- Granted
Links
- 238000010410 dusting Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 230000008676 import Effects 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 12
- 230000004888 barrier function Effects 0.000 claims description 38
- 239000002245 particle Substances 0.000 claims description 21
- 230000015556 catabolic process Effects 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 15
- 238000000354 decomposition reaction Methods 0.000 claims description 10
- 230000004308 accommodation Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000007921 spray Substances 0.000 description 15
- 239000000428 dust Substances 0.000 description 12
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000005507 spraying Methods 0.000 description 8
- 239000000839 emulsion Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 6
- 238000004945 emulsification Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 206010063493 Premature ageing Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 201000008827 tuberculosis Diseases 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
- F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
Abstract
The invention discloses a kind of block-resistant type hydraulic support atomizing de-dusting control valves, including valve body, valve body is equipped with water inlet, water outlet, control liquid import and valve chamber, inlet and outlet and is connected by valve chamber, core assembly is equipped in valve chamber, core assembly is in non-rigid combining structure；Being equipped between water inlet and valve chamber includes the anti-block filtering device that grit decomposes knife.There are two valve chamber and water outlet are all provided with, two valve chambers are connected by intercommunicating pore, and there is core assembly the two-way formed by two control liquid imports to control liquid driving structure, and two water outlets can be connected by valve chamber and horn mouth with water inlet respectively；Alternatively, two water outlets are connected simultaneously with water inlet by valve chamber and horn mouth, core assembly blocks horn mouth by the valve core head of Self-resetting.The invention has the advantages that spool stroke is short, valve port is switched on and off that response is fast, sealing element service life is long；And spool is without plug hidden danger, compact-sized, voltage endurance capability is strong, service life is long.
Description
Technical field
It is more particularly to a kind of for the anti-of coal mine underground hydraulic support frame atomizing de-dusting the present invention relates to a kind of hydraulic control valve
Stifled type hydraulic control valve.
Background technology
Current country pays much attention to the harmfulness of dust, in order to a line worker life security and reduce dirt to greatest extent
The generation of tuberculosis, either old project or grassroot project require very sternly in terms of environmental protection inspection and acceptance, as long as dust point is all necessary
There is dust prevention；And the most link of coal face dust includes grinding when drop column moves frame dust fall, Sub-Level Caving impact dirt, coal machine cut coal
Dirt and wall caving impact dirt etc. are ground, dust prevention therein is exactly by spraying clear water depositing dust, and atomizing de-dusting mainly passes through hydraulic pressure
Control valve is turned on and off realizing by the HYDRAULIC CONTROL SYSTEM spray valve of hydraulic support.To prevent valve blockage, it usually needs
The front end of clear water access valve sets filter device, hidden so as to eliminate blocking solid impurity in water effectively to be prevented to enter in valve
Suffer from.But this mode causes spraying system complicated.In addition, also there are service life is short or spray outlet for existing control valve
Few deficiency.Such as Chinese patent notification number CN205990928U, date of declaration on March 1st, 2017, a kind of disclosed auto spraying
Control valve, the O-ring seals in core assembly, spool movement valve opening and close two states when, respectively with
Two valve chamber hole sealings, and two valve chamber holes are correspondingly formed on two components, valve chamber hole is docked by horn mouth, is moved in spool
During dynamic, O-ring seals need to move from the cylindrical fit section of one end, and other end circle is entered back into behind horn mouth Butt Section
There is the working condition for expanding and shrinking repeatedly, be easy to cause O-ring seals premature ageing and abrasion, shorten and use the longevity in shell of column
Life.China Patent Publication No. CN104747223A on July 1 2015 publication date, discloses a kind of hydraulic support and sprays automatically
Mist control device, the device are set there are two core assembly, but only there are one spray outlet, it, can only when needing to increase atomizing nozzle
Increase entire control device, cause structure too fat to move, the wasting of resources.For this reason, it may be necessary to existing atomizing de-dusting control valve into advance one
The improvement of step.
The content of the invention
In view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of controls of block-resistant type hydraulic support atomizing de-dusting
Valve, which decomposes the anti-block filtering device of knife by being set on valve body with grit, to reduce dust size, so as to
Effectively prevent spool jams；Further realize that the Integrated design of diplopore way of supplying water simplifies and tight by bivalve cored structure in parallel
It gathers structure, reduces cost；Structure is also turned off by short stroke and shortens the drive of spool displacement distance and spool by non-rigid connection
Dynamic component and executive module composition, avoid that mating interface occurs in sealing element moving area or valve chamber hole wall is tangentially perforated, and extend close
The sealing service life.
To realize object defined above, the present invention adopts the following technical scheme that.
A kind of block-resistant type hydraulic support atomizing de-dusting control valve, including valve body, valve body is equipped with water inlet, water outlet, control
Liquid import processed and valve chamber, inlet and outlet are connected by valve chamber, core assembly are equipped in valve chamber, core assembly is in control liquid
The lower movement of effect, to form the on and off of water inlet and apopore；Being equipped between the water inlet and valve chamber includes grit
Decompose the anti-block filtering device of knife.
Using the present invention of preceding solution, controlled by the pressure fluid that liquid import is controlled to enter, make water outlet with into
The mouth of a river is connected and is blocked, so as to form the atomizing de-dusting control valve of hydraulic support, for forming hydraulic prop in coal working face
The measurements for reduction in region due to being equipped with anti-block filtering device between the water inlet and valve chamber on valve body, can effectively prevent big grain
Footpath dust enters in the spray channel of control valve, can effectively reduce or eliminate the cloggings such as control valve and spray nozzle, improves spray
Mist reliability extends the service life of measurements for reduction system.Moreover, anti-block filtering device, which includes dust, decomposes knife, can intake
Kinetic energy position makes dust that impact, collision occur with knife, so as to effectively reduce the dust size of water inlet end, reduces system to water
Middle impurity Particle size requirements, widen the scope of application.
Preferably, the anti-block filtering device includes decomposing tool apron, and decomposition tool apron is sealedly and fixedly connected to be set in the valve body
In some anti-block filtering device mounting holes, anti-block filtering device mounting hole bottom is equipped with orifice plate, and orifice plate is abutted solid by decomposition tool apron
It is fixed, decompose and particle breakdown chamber be formed in the middle part of tool apron inner end, particle breakdown chamber is connected with the water inlet, decompose tool apron by
Grain decomposes bottom of chamber portion and is fixedly connected with the grit decomposition knife；The orifice plate be equipped with water hole, water hole both ends respectively with particle
Chamber is decomposed to connect with the valve chamber.To form simple, compact anti-block filtering device structure, convenient for being incorporated on valve body.Wherein,
Decomposing knife can be multiple according to cavity volume and the setting of cutter hub size；Preferably, by decompose knife be arranged to circle distribution multiple helical edges or
Straight sword structure, similar to the cylindrical milling cutter or cylindrical bar milling cutter of intermetallic composite coating.
It is further preferred that the decomposition tool apron outer wall is equipped with annular groove, annular groove is connected with the water inlet, annular groove
Bottom is equipped with and is connected with the particle breakdown chamber by blasthole, and the blasthole is close to the particle breakdown cavity wall.To hold
Intracavitary forms spiral water inlet structure, had both increased the impact energy of water inlet, and had also allowed for the water hole import to orifice plate and be rinsed, and drops
Low orifice plate plug hidden danger.
Preferably, there are two the valve chamber and water outlet are all provided with, two valve chambers connect to form parallel-connection structure by intercommunicating pore,
There is the core assembly being equipped in valve chamber the two-way formed by two control liquid imports to control liquid driving structure, to form two
A water outlet can be connected by valve chamber and horn mouth with the water inlet respectively；Alternatively, two water outlets simultaneously with the water inlet
Mouth is connected by valve chamber with horn mouth, and valve core head is equipped in core assembly, and valve core head is used to be formed to the bell-mouthed closure.
To be suitable for by wherein any one water outlet for water spray, alternatively, two water outlets are simultaneously for water spray.Compared with existing
For the control valve that one water outlet is set, structure can be simplified, reduce cost.Moreover, the shut-off of water outlet and water inlet is with connecing
It is logical only to need to realize with opening by bell-mouthed closure, without by O-ring seals with docking in bell-mouthed cooperation section
It moves back and forth, eliminates sealing ring premature wear, aging phenomenon.
It is further preferred that the valve chamber includes valve chamber epimere and valve chamber hypomere；The core assembly includes drive component
With the executive module including valve core head, for the executive module to be driven to move, executive module is used to open or seals drive component
Block up the horn mouth；Valve chamber epimere controls liquid inlet communications for setting the driving component with two；Valve chamber hypomere is used for
The executive module is set, and is connected with the inlet and outlet；Between valve chamber epimere and valve chamber hypomere by valve chamber every
Gear is separated into two separate spaces；Drive component is connected with executive module by connecting rod, and connecting rod stage casing bar portion is described in
Valve chamber barrier, and pass through the matching hole that valve chamber barrier is equipped with and be slidably matched with valve chamber barrier formation, valve chamber barrier both ends
It is provided through the connecting rod and the sealing transparent cover of closure is formed to the matching hole.Effectively to avoid spraying clear water with controlling liquid
It alters liquid phenomenon, eliminates and be diluted using the control liquid of emulsion or the risk of water, extension hydraulic pressure are mixed using the control liquid of hydraulic oil
The service life of system and spray dust-reducing system.It is controlled and supplied water using horn mouth, block bell-mouthed executive module movement 2mm
Left and right can open completely, be switched on and off response quickly, agility.
Still more preferably, the executive module includes valve core head fixed seat, and valve core head fixed seat is movably located at
In valve chamber hypomere, Self-resetting elastic element, valve core head fixed seat and institute are equipped between valve core head fixed seat and the valve chamber barrier
It states and is connected by synchronizing moving connection structure between connecting rod, which sets for being moved up in the connecting rod
After set a distance, the valve core head fixed seat is pulled synchronously to move up；The valve core head, which screws togather, to be fixed on the valve core head and fixes
Seat lower end.Only to form being automatically closed for valve port by elastic element, the driving that control valve is closed is without pressurize, it is only necessary to one
Closing can be completed in a execution action, it is ensured that closes reliable, fast response time, and can effectively reduce valve and close energy consumption.And make
Drive component and executive module form nonrigid connection relation, can effectively avoid, spool moving range there are mating interface or
Has valve chamber hole wall section jaggy, to extend seal durability, so as to improve control valve service life indirectly.Wherein, even
The setpoint distance that extension bar moves up can meet elastic element with 2.0mm~3.0mm and automatically reset range demands, respective drive
The displacement distance of component is only needed between 4.0mm~5.0mm；And cylinder or circular cone compression can be used in Self-resetting elastic element
Spring, disk spring or elastic washer with Elastic penetration etc. made of elastomeric material, as long as it can be utilized
The bell-mouthed any structural elasticity element of elastic force automatic plugging.
Still further preferably, the valve chamber hypomere is in cylinder pore structure；Under the valve core head fixed seat and the valve chamber
The cylindrical hole of section is slidably matched；The valve core head is in step axle construction, and valve core head is in for blocking the bell-mouthed work department
Cylindric, the cylinder diameter of the work department is less than the cylinder bore diameter of valve chamber hypomere.To pass through cylindric valve core head and loudspeaker
Mouth forms reliable sealed connection, even if occurring after wearing, also can automatically be compensated by Self-resetting elastic element, it is ensured that water outlet
Shut-off is reliable.In addition, valve core head is less than the cylinder bore diameter of valve chamber hypomere, it can be ensured that between valve core head and valve chamber hypomere inner wall
Toroidal cavity is formed, reliably to supply water to another valve chamber.
Still further preferably, the intercommunicating pore is connected on two valve chamber hypomeres.Ensure that two valve chambers pass through equal valve chamber
Hypomere toroidal cavity water storage forms juxtaposition.
Still further preferably, the synchronizing moving connection structure includes end and the spool that connecting rod lower end is equipped with
The end accommodation space that head fixed seat top is equipped with；It is used to screw togather the threaded hole bottom of the valve core head in the valve core head fixed seat
In blind hole structure, blind via bottom is formed with the perforation for wearing the connecting rod, which forms the end accommodation space, and
When the valve core head is in the bell-mouthed sealed condition, which, which also has, allows end axial movement to set
The space of set a distance.To realize mobile connection structure by simple, compact structure；Ensure to close in water outlet and load, connection
After bar moves up setpoint distance, valve core head fixed seat is being driven to move upwards, atomizing de-dusting is provided out to open apopore
Use clear water.
Still more preferably, the driving component includes piston, and piston is fixedly connected on connecting rod upper end, and piston slides
In cylinder sleeve, cylinder sleeve is arranged in valve chamber epimere for cooperation, and cylinder sleeve outer end is equipped with limit base, and limit base, which is formed, sets the piston
Piston cylinder body one end cylinder bottom；One in described two control liquid imports is located on limit base, and above piston；It is another
It is a to be set by the valve body and valve chamber epimere, and below piston；The bottom that the valve chamber barrier passes through the valve chamber epimere
Portion is set, and is passed through barrier sealing ring and formed liquid sealed connection with valve chamber epimere inner wall, and valve chamber barrier, which is formed, sets the piston
Piston cylinder body other end cylinder bottom.Piston only coordinates with cylinder sleeve, is no different, can have with the pistons work state of conventional cylinder
Effect ensures that drive component movement driving is reliable, and simple in structure, compact in design, service life are long.And after piston and barrel wear
It is replaceable, to extend the valve body service life.Valve chamber barrier can be in the structure for being fixed on valve chamber epimere bottom, also movably be located at valve chamber
Epimere bottom, to form the valve chamber barrier of piston structure.
This control valve is more than 100,000 times by test pressure for 10MPa service lifes；And stent spraying of the prior art
For control valve hydraulic pressure when less than 5MPa, the service life is 3000 times or so, and when hydraulic pressure is more than 5MPa, portioned product service life is even
Also it is not achieved 1000 times.For the prior art, this product voltage endurance capability is strong, service life is long, has apparent
Technical advantage.
The invention has the advantages that spool stroke is short, valve port is switched on and off that response is fast, seal durability is long；
And spool is without plug hidden danger, compact-sized, voltage endurance capability is strong, service life is long.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings, but does not therefore limit the present invention to the implementation
Among example scope.
Referring to Fig. 1, a kind of block-resistant type hydraulic support atomizing de-dusting control valve, including valve body 1, valve body 1 is equipped with water inlet
2nd, water outlet, control liquid import and valve chamber, water inlet 2 are connected with water outlet by valve chamber, and core assembly, spool are equipped in valve chamber
Component moves under control liquid effect, to form the on and off of water inlet 2 and apopore；The water inlet 2 and valve chamber it
Between be equipped with include grit decomposition knife 3 anti-block filtering device.
Wherein, the anti-block filtering device includes decomposing tool apron 4, and decomposition tool apron 4 is sealedly and fixedly connected to be set in the valve body 1
In some anti-block filtering device mounting holes, anti-block filtering device mounting hole bottom is equipped with orifice plate 5, and orifice plate 5 is abutted by decomposition tool apron 4
It is fixed, it decomposes and is formed with particle breakdown chamber in the middle part of 4 inner end of tool apron, particle breakdown chamber is connected with the water inlet 2, decomposes tool apron 4
Multiple grits are fixedly connected with by particle breakdown bottom of chamber portion and decompose knife 3, grit, which decomposes knife 3, has the multiple of circle distribution
Helical edges or straight sword；The orifice plate 5 is equipped with water hole, and water hole water inlet end is connected by 100 mesh filter screens and particle breakdown chamber
Logical, water hole water outlet end is connected with the valve chamber.It decomposes 4 outer wall of tool apron and is equipped with annular groove 4a, annular groove 4a and the water inlet
Mouth 2 connects, and annular groove 4a bottoms are equipped with and are connected with the particle breakdown chamber by blasthole, and the blasthole is close to the particle point
Solve cavity wall.
There are two the valve chamber and water outlet are all provided with, including the first valve chamber 16, the second valve chamber 17, the first water outlet 18 and
Two water outlets 19；First valve chamber 16 is connected with the second valve chamber 17 by intercommunicating pore 6, and the core assembly being equipped in valve chamber has
The two-way formed by the first control liquid import 20 and the second control liquid import 21 controls liquid driving structure, to be formed in the first loudspeaker
When mouth 22 is closed, the second water outlet 19 can pass through the first valve chamber 16, intercommunicating pore 6,17 valve chamber of the second valve chamber and the second horn mouth 23
It is connected with the water inlet 2；When the second horn mouth 23 is closed, the first water outlet 18 can pass through the first valve chamber 16 and the first loudspeaker
Mouth 22 is connected with the water inlet 2；Valve core head 7 is equipped in core assembly, valve core head 7 is for formation to the bell-mouthed envelope of correspondence
It is stifled.To be suitable for by wherein any one water outlet for water spray, alternatively, two water outlets are simultaneously for water spray.
The valve chamber includes valve chamber epimere and valve chamber hypomere；The core assembly includes drive component and including valve core head 7
Executive module, for drive component for the executive module to be driven to move, executive module is used to open or blocks the horn mouth；
Valve chamber epimere controls liquid inlet communications for setting the driving component with two；Valve chamber hypomere is used to set the execution
Component, and connected with the water inlet 2 and water outlet；Between valve chamber epimere and valve chamber hypomere two are separated by valve chamber barrier 8
A separate space；Drive component is connected by connecting rod 9, and 9 stage casing bar portion of connecting rod passes through the valve chamber barrier 8, and passes through valve
The matching hole that chamber barrier 8 is equipped with is slidably matched with the valve chamber barrier 8 formation, and 8 both ends of valve chamber barrier are provided through the company
Extension bar 9 and the sealing transparent cover 10 that closure is formed to the matching hole, sealing transparent cover 10, which screws togather, to be fixed in valve chamber barrier 8, in
End face forms static seal with 8 outer end face of valve chamber barrier and is connected, and the hole wall for wearing the hole of connecting rod 9 is equipped with sealing element or is formed close
Component structure is sealed, hole wall forms dynamic sealing with the bar portion of connecting rod 9 and is connected.
The executive module includes valve core head fixed seat 11, and valve core head fixed seat 11 is movably located in valve chamber hypomere,
The Self-resetting elastic element 12 being made of compression spring, valve core head are equipped between valve core head fixed seat 11 and the valve chamber barrier 8
It is connected between fixed seat 11 and the connecting rod 9 by synchronizing moving connection structure, which is used in the company
After extension bar 9 moves up 2.0mm~3.0mm distances, by connecting rod 9 the valve core head fixed seat 11 is pulled synchronously to move up；
The valve core head 7, which screws togather, is fixed on 11 lower end of valve core head fixed seat.The valve chamber hypomere is in cylinder pore structure；The spool
Head fixed seat 11 and the cylindrical hole of the valve chamber hypomere are slidably matched；The valve core head 7 is in step axle construction, and valve core head 7 is used for
Block that the bell-mouthed work department is cylindrical, the cylinder diameter of the work department is less than the cylinder bore diameter of valve chamber hypomere.
The intercommunicating pore 6 is connected on two valve chamber hypomeres.The synchronizing moving connection structure includes the end that 9 lower end of connecting rod is equipped with
The end accommodation space being equipped with 11 top of valve core head fixed seat；It is used to screw togather the valve in the valve core head fixed seat 11
The threaded hole bottom of core print 7 is in blind hole structure, and blind via bottom is formed with the perforation for wearing the connecting rod 9, which forms described
End accommodation space, and when the valve core head 7 is in the bell-mouthed sealed condition, which also has
End is allowed to move axially the space of 2.0mm~3.0mm distances.
The driving component includes piston 13, and piston 13 is fixedly connected on 9 upper end of connecting rod, and piston 13 is slidably fitted in cylinder
In set 14, cylinder sleeve 14 is arranged in valve chamber epimere, and cylinder sleeve 14 is resisted against valve chamber epimere aperture by the ring flange that its outer end is set
Edge, 14 outer end of cylinder sleeve are equipped with limit base 15, and limit base 15, which screws togather, to be fixed on the valve body 1, and limit base 15, which is formed, sets institute
State piston cylinder body one end cylinder bottom of piston 13, limit base 15 to by 13 travel limit of piston between 4.0mm~5.0mm；
The first control liquid import 20 in the first control liquid import 20 and the second control liquid import 21 is located on limit base 15, and position
Above piston 13；Second control liquid import 21 is set by the valve body 1 and valve chamber epimere, and positioned at 13 lower section of piston；Institute
It states valve chamber barrier 8 to set by the bottom of the valve chamber epimere, and passes through barrier sealing ring 24 and form liquid with valve chamber epimere inner wall
It is tightly connected, valve chamber barrier 8 forms the other end cylinder bottom for the piston cylinder body for setting the piston 13.
In the present embodiment, valve chamber barrier 8 can be in the structure for being fixed on valve chamber epimere bottom, also movably be located on valve chamber
Section bottom, to form the valve chamber barrier 8 of piston structure.When using moveable set-up mode, the second control liquid import 21 with
Intersegmental part runs through position on valve chamber, it is necessary to when being moved positioned at valve chamber barrier 8, beyond the moving area of barrier sealing ring 24.
In the present embodiment, cylinder or circular cone compression spring, disk spring, Huo Zheyou also can be used in Self-resetting elastic element 12
Elastic washer with Elastic penetration etc. made of elastomeric material, for substituting cylindrical compression spring.
In this implementation, when the first horn mouth 22 and the second horn mouth 23 are opened, two water outlets simultaneously with it is described into
The mouth of a river 2 is connected by valve chamber with horn mouth, with meet two at simultaneously atomizing de-dusting or other water requirements.
For the present invention in the hydraulic prop system practical application of coal working face, the course of work is as follows：
When stent plate withdraws realization Sub-Level Caving, the second control liquid import 21 on right side and high-pressure emulsion in Fig. 1
Pipeline connection, emulsion enter the lower section of piston 13 of right hand piston cylinder cylinder body cavity of resorption, piston 13 under the effect of emulsification hydraulic power to
Upper movement, when valve chamber barrier 8 is using moveable structure, valve chamber barrier 8 is moved down into design position；In piston 13 with leading to
Cross the connection that is screwed connecting rod 9 synchronously move up 2.5mm after, 9 upper end head of connecting rod will be with valve core head fixed seat 11
Closely knit contact, the piston 13 continued to move up will be driven by connecting rod 9 valve core head fixed seat 11 and with valve core head fixed seat
11 valve core heads 7 being spirally connected overcome 12 elastic force of the Self-resetting being made of compression spring elastic element to move up 2mm and reach this row
Journey terminal, mobile valve core head 7 will open the first horn mouth 22 and the first water outlet 18 of closing originally, when the first horn mouth 2
After opening, the first water outlet 18 is connected with the valve chamber hypomere of the first valve chamber 16, it is achieved thereby that the first water outlet 18 and water inlet 2
Connection, the static pressure water that impurity is contained in underground pass sequentially through water inlet 2, annular groove 4a, blasthole tangentially into decompose tool apron 4 in
The particle breakdown intracavitary that end middle part is formed, big grain size impurity is blocked in outside orifice plate 5 in water, and under the effect of tangential hydraulic impact
High-speed motion, and decompose knife 3 with grit and collide, rub, the physical contacts such as intercept and be constantly decomposed, crush, when particle is several
When what diameter is less than 5 hole diameter of orifice plate, dust-contained airflow when orifice plate sprays to Sub-Level Caving by the first water outlet 18 is passed through, is reached
To atomizing de-dusting purpose.
When Sub-Level Caving, which completes plate, to be stretched out, the first control liquid import 20 on right side and high-pressure emulsification liquid pipe in Fig. 1
Road is connected, and emulsion enters 13 top of piston of right hand piston cylinder cylinder body epicoele, and piston 13 is downward under the effect of emulsification hydraulic power
Mobile, it is that connecting rod 9 moves downward simultaneously that piston 13 and being threadably secured, which is connected, moves down distance when the two moves and is more than
During 2.0mm, connecting rod separates above 9 end with valve core head fixed seat 11, and connecting rod 9 loads the work in valve core head fixed seat 11
It firmly disappears, connecting rod 9 will continue to move down 2.5mm under hydraulic pressure effect reaches this stroke end, without liquid
The valve core head fixed seat 11 of pressure pressure effect and the valve core head 7 that is screwed togather with valve core head fixed seat 11 by compression spring form from
2.5mm is moved down under the effect of 12 elastic force of reseting elastic element and reaches this stroke end, mobile valve core head 7 opens script
The first horn mouth 22 block, blocked the connected state of the valve chamber hypomere of the first water outlet 18 and the first valve chamber 16, i.e., first
Water outlet 18 and the access of valve chamber hypomere and water inlet 2 are turned off, and stop supplying water to Sub-Level Caving spraying frame, spraying stops.
When stent rear column declines, the second control liquid import 21 in left side and high-pressure emulsion pipeline connection in Fig. 1,
Emulsion enters 13 lower section of piston of left hand piston cylinder cylinder body cavity of resorption, and piston 13 moves up under the effect of emulsification hydraulic power,
When valve chamber barrier 8 is using moveable structure, valve chamber barrier 8 is moved down into design position；In piston 13 with being consolidated by screw thread
Surely after the connecting rod 9 connected synchronously moves up 2.5mm, 9 upper end head of connecting rod will with valve core head fixed seat 11 is closely knit contacts,
The piston 13 continued to move up will drive valve core head fixed seat 11 and the valve being spirally connected with valve core head fixed seat 11 by connecting rod 9
Core print 7 overcomes 12 elastic force of the Self-resetting being made of compression spring elastic element to move up 2mm and reaches this stroke end, moves
Dynamic valve core head 7 will open the second horn mouth 23 and the second water outlet 19 of closing originally, after the second horn mouth 23 is opened, the
Two water outlets 19 are connected with the valve chamber hypomere of the second valve chamber 17, the valve chamber that the second valve chamber 17 passes through 6 and first valve chamber 16 of intercommunicating pore
Hypomere connects, and realizes the connection of the second water outlet 19 and water inlet 2, and the static pressure water that impurity is contained in underground passes sequentially through water inlet
2nd, annular groove 4a, blasthole, which tangentially enter, decomposes the particle breakdown intracavitary that 4 inner end of tool apron middle part is formed, big grain size impurity quilt in water
It is blocked in outside orifice plate 5, and the high-speed motion under the effect of tangential hydraulic impact, and decompose knife 3 with grit and collide, rub, block
It cuts and physical contacts is waited constantly to be decomposed, crush, when particle geometric diameter is less than 5 hole diameter of orifice plate, passes through orifice plate and pass through
Second water outlet 19 sprays to dust-contained airflow during Sub-Level Caving, reaches atomizing de-dusting purpose.
When stent rear column rises, the first of left side controls liquid import 20 to be connect with high-pressure emulsification liquid pipeline in Fig. 1
Logical, emulsion enters 13 top of piston of left hand piston cylinder cylinder body epicoele, and piston 13 moves down under the effect of emulsification hydraulic power,
Piston 13 is threadably secured with connecting rod 9 and is connected, when mobile piston moves down 2.5mm together with connecting rod 9, connection
It will be separated above 9 end of bar with valve core head fixed seat 11, the active force that connecting rod 9 is added in valve core head fixed seat 11 disappears, even
Extension bar 9 will then proceed to move down 2mm under hydraulic pressure effect reaches this stroke end, is acted on without hydraulic pressure
Valve core head fixed seat 11 and the valve core head 7 hinged with valve core head fixed seat 11 be made of compression spring Self-resetting elasticity member
2mm is moved down under the effect of 12 elastic force of part and reaches this stroke end, the second horn mouth that mobile valve core head 7 opens script
23 and second water outlet 19 seal, stop to drop column spraying frame for water spray stopping.
The preferred embodiment of the present invention described in detail above.It should be appreciated that those of ordinary skill in the art without
Creative work is needed according to the present invention can to conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a kind of block-resistant type hydraulic support atomizing de-dusting control valve, including valve body (1), valve body (1) is equipped with water inlet (2), goes out
The mouth of a river, control liquid import and valve chamber, water inlet (2) are connected with water outlet by valve chamber, and core assembly, spool group are equipped in valve chamber
Part moves under control liquid effect, to form the on and off of water inlet (2) and apopore；It is characterized in that, the water inlet
Mouth (2) is equipped between valve chamber includes the anti-block filtering device that grit decomposes knife (3).
2. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 1, which is characterized in that the anti-blocking filtering
Device includes decomposing tool apron (4), decomposes tool apron (4) and is sealedly and fixedly connected the anti-block filtering device peace being equipped in the valve body (1)
It fills in hole, anti-block filtering device mounting hole bottom is equipped with orifice plate (5), and orifice plate (5) is abutted by decomposition tool apron (4) and fixed, and decomposes knife
Seat is formed with particle breakdown chamber in the middle part of (4) inner end, and particle breakdown chamber is connected with the water inlet (2), decompose tool apron (4) by
Grain decomposes bottom of chamber portion and is fixedly connected with the grit decomposition knife (3)；The orifice plate (5) is equipped with water hole, water hole both ends difference
It is connected with particle breakdown chamber and the valve chamber.
3. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 2, which is characterized in that the decomposition tool apron
(4) outer wall is equipped with annular groove (4a), and annular groove (4a) connects with the water inlet (2), annular groove (4a) bottom equipped with it is described
Particle breakdown chamber is connected by blasthole, and the blasthole is close to the particle breakdown cavity wall.
4. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 1, which is characterized in that the valve chamber and go out
There are two the mouth of a river is all provided with, two valve chambers are connected by intercommunicating pore (6), and the core assembly being equipped in valve chamber has by two controls
The two-way control liquid driving structure that liquid import processed is formed, with formed two water outlets can respectively by valve chamber and horn mouth with it is described
Water inlet (2) connects；Alternatively, two water outlets are connected simultaneously with the water inlet (2) by valve chamber and horn mouth, core assembly
In be equipped with valve core head (7), valve core head (7) for formed to the bell-mouthed closure.
5. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 4, which is characterized in that the valve chamber includes
Valve chamber epimere and valve chamber hypomere；The core assembly includes drive component and includes the executive module of valve core head (7), drive component
For the executive module to be driven to move, executive module is used to open or blocks the horn mouth；Valve chamber epimere is used to set institute
Drive component is stated, and liquid inlet communications are controlled with two；Valve chamber hypomere for setting the executive module, and with the water inlet
(2) connected with water outlet；Two separate spaces are separated by valve chamber barrier (8) between valve chamber epimere and valve chamber hypomere；Driving
Component and executive module are connected by connecting rod (9), and connecting rod (9) stage casing bar portion passes through the valve chamber barrier (8), and passes through valve
The matching hole that chamber barrier (8) is equipped with is formed with the valve chamber barrier (8) and is slidably matched, and valve chamber barrier (8) both ends are provided through
The connecting rod (9) and the sealing transparent cover (10) that closure is formed to the matching hole.
6. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 5, which is characterized in that the executive module
Including valve core head fixed seat (11), valve core head fixed seat (11) is movably located in valve chamber hypomere, valve core head fixed seat (11)
Be equipped with Self-resetting elastic element (12) between the valve chamber barrier (8), valve core head fixed seat (11) and the connecting rod (9) it
Between connected by synchronizing moving connection structure, which is used in the connecting rod (9) move up setpoint distance
Afterwards, the valve core head fixed seat (11) is pulled synchronously to move up；The valve core head (7), which screws togather, to be fixed on the valve core head and fixes
Seat (11) lower end.
7. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 6, which is characterized in that the valve chamber hypomere
In cylinder pore structure；The valve core head fixed seat (11) and the cylindrical hole of the valve chamber hypomere are slidably matched；The valve core head (7)
In step axle construction, valve core head (7) is cylindrical for blocking the bell-mouthed work department, the cylinder diameter of the work department
Less than the cylinder bore diameter of valve chamber hypomere.
8. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 7, which is characterized in that the intercommunicating pore
(6) it is connected on two valve chamber hypomeres.
9. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 6, which is characterized in that the synchronizing moving
Connection structure include the end that the end that is equipped with of connecting rod (9) lower end and the valve core head fixed seat (11) top are equipped with accommodate it is empty
Between；For screwing togather the threaded hole bottom of the valve core head (7) in blind hole structure on the valve core head fixed seat (11), blind via bottom shape
Into there is the perforation that wears the connecting rod (9), which forms the end accommodation space, and is in the valve core head (7)
During to the bell-mouthed sealed condition, which also has the space that end is allowed to move axially setpoint distance.
10. block-resistant type hydraulic support atomizing de-dusting control valve according to claim 5, which is characterized in that the driving group
Part includes piston (13), and piston (13) is fixedly connected on connecting rod (9) upper end, and piston (13) is slidably fitted in cylinder sleeve (14),
Cylinder sleeve (14) is arranged in valve chamber epimere, and cylinder sleeve (14) outer end is equipped with limit base (15), and limit base (15), which is formed, sets the work
Fill in piston cylinder body one end cylinder bottom of (13)；One in described two control liquid imports is located on limit base (15), and is located at
Above piston (13)；Another is set by the valve body (1) and valve chamber epimere, and below piston (13)；The valve chamber
Barrier (8) is set by the bottom of the valve chamber epimere, and pass through barrier sealing ring (24) formed with valve chamber epimere inner wall it is liquid-tight
Envelope connection, valve chamber barrier (8) form the other end cylinder bottom for the piston cylinder body for setting the piston (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335387.6A CN108050275B (en) | 2017-12-13 | 2017-12-13 | Anti-blocking type hydraulic support spraying dust fall control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335387.6A CN108050275B (en) | 2017-12-13 | 2017-12-13 | Anti-blocking type hydraulic support spraying dust fall control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108050275A true CN108050275A (en) | 2018-05-18 |
| CN108050275B CN108050275B (en) | 2023-11-28 |
Family
ID=62132183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711335387.6A Active CN108050275B (en) | 2017-12-13 | 2017-12-13 | Anti-blocking type hydraulic support spraying dust fall control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108050275B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109237080A (en) * | 2018-10-30 | 2019-01-18 | 河南鑫之辉机电设备有限公司 | A kind of six slide valves of mechanical one and application method |
| CN109354266A (en) * | 2018-12-21 | 2019-02-19 | 徐荣霞 | A kind of Multilayer filtering type cleaning equipment suitable for handling sewage |
| CN109939486A (en) * | 2019-03-20 | 2019-06-28 | 武汉泰歌氢能汽车有限公司 | A kind of fuel battery engines runner transform particulate filter |
| CN111075953A (en) * | 2019-10-07 | 2020-04-28 | 阿特拉斯·科普柯空气动力股份有限公司 | Flush valve, dust collector and dust collection system |
| CN113719308A (en) * | 2021-09-09 | 2021-11-30 | 国能神东煤炭集团有限责任公司 | Support system for realizing air-water linkage spraying |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2545735A1 (en) * | 1983-05-13 | 1984-11-16 | Saarbergwerke Ag | Advancing mine support frames dust settling sprinkler system |
| CN2235502Y (en) * | 1995-07-22 | 1996-09-18 | 潞矿王庄华亿实业公司橡胶厂 | Hydraulic supporting automatic spraying dust eliminating apparatus |
| CN2278082Y (en) * | 1996-11-20 | 1998-04-08 | 申冰冰 | Automatic spraying dust removing device of single signal self-locking hydraulic support frame |
| CN101403444A (en) * | 2008-11-17 | 2009-04-08 | 天津理工大学 | Non-discharging type liquid-control hydraulic break valve |
| CN104826375A (en) * | 2015-04-23 | 2015-08-12 | 中煤科工集团重庆研究院有限公司 | Spraying anti-blocking pre-filter |
| CN106122548A (en) * | 2016-08-17 | 2016-11-16 | 中煤科工集团重庆研究院有限公司 | Without electricity type transfer point spray control valve |
| CN207539387U (en) * | 2017-12-13 | 2018-06-26 | 中煤科工集团重庆研究院有限公司 | Block-resistant type hydraulic support atomizing de-dusting control valve |
-
2017
- 2017-12-13 CN CN201711335387.6A patent/CN108050275B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2545735A1 (en) * | 1983-05-13 | 1984-11-16 | Saarbergwerke Ag | Advancing mine support frames dust settling sprinkler system |
| CN2235502Y (en) * | 1995-07-22 | 1996-09-18 | 潞矿王庄华亿实业公司橡胶厂 | Hydraulic supporting automatic spraying dust eliminating apparatus |
| CN2278082Y (en) * | 1996-11-20 | 1998-04-08 | 申冰冰 | Automatic spraying dust removing device of single signal self-locking hydraulic support frame |
| CN101403444A (en) * | 2008-11-17 | 2009-04-08 | 天津理工大学 | Non-discharging type liquid-control hydraulic break valve |
| CN104826375A (en) * | 2015-04-23 | 2015-08-12 | 中煤科工集团重庆研究院有限公司 | Spraying anti-blocking pre-filter |
| CN106122548A (en) * | 2016-08-17 | 2016-11-16 | 中煤科工集团重庆研究院有限公司 | Without electricity type transfer point spray control valve |
| CN207539387U (en) * | 2017-12-13 | 2018-06-26 | 中煤科工集团重庆研究院有限公司 | Block-resistant type hydraulic support atomizing de-dusting control valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109237080A (en) * | 2018-10-30 | 2019-01-18 | 河南鑫之辉机电设备有限公司 | A kind of six slide valves of mechanical one and application method |
| CN109354266A (en) * | 2018-12-21 | 2019-02-19 | 徐荣霞 | A kind of Multilayer filtering type cleaning equipment suitable for handling sewage |
| CN109354266B (en) * | 2018-12-21 | 2021-11-26 | 徐荣霞 | Multi-layer filtering type purifying equipment suitable for treating sewage |
| CN109939486A (en) * | 2019-03-20 | 2019-06-28 | 武汉泰歌氢能汽车有限公司 | A kind of fuel battery engines runner transform particulate filter |
| CN111075953A (en) * | 2019-10-07 | 2020-04-28 | 阿特拉斯·科普柯空气动力股份有限公司 | Flush valve, dust collector and dust collection system |
| CN113719308A (en) * | 2021-09-09 | 2021-11-30 | 国能神东煤炭集团有限责任公司 | Support system for realizing air-water linkage spraying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108050275B (en) | 2023-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108050275A (en) | A kind of block-resistant type hydraulic support atomizing de-dusting control valve | |
| CN101374708B (en) | Light cleaning device for a vehicle | |
| CN102428253B (en) | Pressure relief valve | |
| EP0355584B1 (en) | Window washing arrangement for motor vehicles, in particular a washing arrangement for lamp glasses | |
| CN207539387U (en) | Block-resistant type hydraulic support atomizing de-dusting control valve | |
| CN106881212B (en) | Multifunctional spray jet nozzle | |
| CN103038520A (en) | Time-delay valve | |
| EP2038553B1 (en) | Cylinder piston arrangement for a fluid pump or a fluid motor | |
| CN202579789U (en) | Jacking-pulling type hydraulic buffer | |
| CN204344337U (en) | With the pressure regulator valve of automobile fuel pump assembly destaticing mechanism | |
| CN210716169U (en) | Gas cylinder valve | |
| DE10245606A1 (en) | Valve arrangement for a pressure flushing system | |
| CN209693847U (en) | Nozzle component, flusher and unmanned vehicle | |
| CN102748504A (en) | Dual-gas supply gas valve | |
| CN108160365A (en) | Drilling rod thread oil spray body | |
| CN201714748U (en) | Safety valve for multi-way valve | |
| CN203201574U (en) | Automatic spraying control valve for hydraulic support | |
| CN103925396A (en) | Full-bore energy-saving check valve | |
| CN207887402U (en) | Dope spray body for drilling rod thread | |
| CN204114251U (en) | A kind of Multifunctional combined valve | |
| CN210621402U (en) | Double-nozzle asphalt spraying valve | |
| CN204201210U (en) | A kind of reduction valve | |
| CN202202878U (en) | Hydraulic control one-way valve | |
| CN201321017Y (en) | Automobile headlamp cleaning device | |
| CN103256421B (en) | Electromagnetic zone control valve for high-pressure water mist extinguishing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |