CN110513510A - Automatic backwashing type electro-hydraulic reversing valve for hydraulic support for low coal seam - Google Patents
Automatic backwashing type electro-hydraulic reversing valve for hydraulic support for low coal seam Download PDFInfo
- Publication number
- CN110513510A CN110513510A CN201910903553.0A CN201910903553A CN110513510A CN 110513510 A CN110513510 A CN 110513510A CN 201910903553 A CN201910903553 A CN 201910903553A CN 110513510 A CN110513510 A CN 110513510A
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- Prior art keywords
- chamber
- valve
- backwash
- electro
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003245 coal Substances 0.000 title claims abstract description 20
- 238000011001 backwashing Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 239000008358 core component Substances 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims description 20
- 239000000306 component Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
- E21D15/45—Hydraulic, pneumatic, or hydraulic-pneumatic props having closed fluid system, e.g. with built-in pumps or accumulators
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of 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
- 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
-
- 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
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
Abstract
The invention discloses a kind of automatic backwashing type electro-hydraulic reversing valve for hydraulic support for low coal seam, including valve body, valve body inlet, valve body liquid return hole, backwash outlet and multiple electromagnetic priority valves on valve body are set；Multipair electro-hydraulic reversing valve core assembly, the first and second backwash control valve core components, an element kit, one time liquid open circuit core assembly are provided in valve body；Each electro-hydraulic reversing valve core assembly, backwash control valve core component, element kit and time liquid open circuit core assembly is separately positioned in respective valve chamber；Each electromagnetic priority valve controls a pair of of electro-hydraulic reversing valve core assembly movement, and the on-off form of control the first and second backwashes control valve core component respectively, for backwashing to screen tube in element kit.Advantage of the present invention eliminates the automatic backwashing filter of existing hydraulic support for low coal seam, substantially reduces general layout space；Save the assembling line of backwash filter simultaneously.
Description
Technical field
The present invention relates to hydraulic support for low coal seam, are especially for the automatic backwashing type electricity of hydraulic support for low coal seam
Liquid reversal valve.
Background technique
In recent years, with the development of coal industry field, the construction of high-yield and high-efficiency fully-mechanized mining working is also more and more, with coal seam
While disposable mining height continues to increase, the exploitation in the coal seam Bao Youzhi is also paid close attention to by people, as thin coal bed fully-mechanized mining face
One of main support apparatus, the research and development of hydraulic support for low coal seam are just put in face of common people.
Limitation of the hydraulic support for low coal seam due to its support space, it is desirable that valve class selected by bracket is meeting requirement
While, volume should reduce as far as possible, especially the biggish electro-hydraulic reversing valve of volume, pendulum of the electronic backwash filter on bracket
Put the difficult point that position is even more hydraulic support for low coal seam design.To solve this problem, currently, electro-hydraulic reversing valve is fixed on set cap
It is upper and automatic backwashing filter is mounted on bracket base and opens crotch position.This allows for being connected to automatic backwashing filter and electricity
Hydraulic pipeline, controlling cable distance between liquid reversal valve is longer, it may be assumed that the liquid outlet of automatic backwashing filter and electro-hydraulic commutation
The inlet of valve is connected by high-pressure rubber pipe with pipeline fitting, and high-voltage oil liquid is from automatic backwashing filter working hole feed liquor, through anti-
Flushing valve string enters main filter core, enters electro-hydraulic reversing valve using high-pressure rubber pipe, then passes through every group of function of electro-hydraulic reversing valve again
Energy electromagnetic priority valve control enters each for liquid interface realization jack unilateral side feed liquor.This does not only result in feed liquor sebific duct, pipeline fitting and U
The increased costs of type card, while driving the cable of electromagnetic priority valve longer, it is easy to pull apart and cause stopping accident.
Summary of the invention
It is an object of that present invention to provide a kind of automatic backwashing type electro-hydraulic reversing valves for hydraulic support for low coal seam, full
Under the premise of sufficient hydraulic support for low coal seam requirements of installation space, manufacturing cost is reduced.
To achieve the above object, the present invention takes following technical proposals:
Automatic backwashing type electro-hydraulic reversing valve of the present invention for hydraulic support for low coal seam, including valve body are arranged described
Valve body inlet, valve body liquid return hole, backwash outlet and multiple electromagnetic priority valves on valve body；It is provided in valve body multipair electro-hydraulic
Reversing valve core component, the first and second backwash control valve core components, an element kit, one time liquid open circuit core assembly；
Each electro-hydraulic reversing valve core assembly, backwash control valve core component, element kit and time liquid open circuit core assembly difference
It is arranged in respective valve chamber；Each electromagnetic priority valve controls a pair of of electro-hydraulic reversing valve core assembly movement respectively, for controlling
Flexible, and the on-off forms of control the first and second backwashes control valve core components of hydraulic jack processed or hydraulic vertical prop,
For being backwashed to screen tube in element kit；The valve body inlet and backwash outlet respectively with the first backwash valve
Chamber, the second backwash valve chamber connection；It is logical that the first, second backwash valve chamber offers first communicated with filter core valve chamber respectively
Liquid mouth, the second fluid-through port；First, second backwash control valve core component is respectively used to application valve body inlet, backwash outlet
With the on-off of first, second fluid-through port；The filter core valve chamber is divided into B1 chamber, C chamber and B2 chamber by element kit；The B1
Chamber is connected to the first backwash valve chamber by the first liquid-passing hole and passes through the first filtering net cylinder and is connected to the C chamber；The B2 chamber
It is connected to the second backwash valve chamber by the second liquid-passing hole and passes through the second filtering net cylinder and be connected to C chamber；C chamber is logical by third
Fluid apertures is connected to the working hole of each electro-hydraulic reversing valve chamber respectively, the liquid return hole of each electro-hydraulic reversing valve chamber respectively with return liquid
The inlet of breaking valve chamber is connected to, and the liquid return hole of described time liquid open circuit valve chamber is connected to the valve body liquid return hole.
The element kit includes intermediate sleeve, and the C chamber is provided in the intermediate sleeve, and C chamber is cross flow passage structure；It is described
First, second filtering net cylinder is set with the opposite sides in intermediate sleeve, the barrel chamber of the first, second filtering net cylinder respectively with C chamber
It communicates and passes through mesh and communicated with the corresponding B1 chamber, B2 chamber.
Advantage major embodiment of the present invention is in the following areas:
1, the automatic backwashing filter for eliminating existing hydraulic support for low coal seam substantially reduces general layout space；Simultaneously
Eliminate hydraulic pipeline between automatic backwashing filter and electro-hydraulic reversing valve, controlling cable, U-shaped card, save manufacture at
This, actuator cable line arrangement is concentrated, is beautiful.
2, it is said from manufacture angle, existing automatic backwashing filter and electro-hydraulic reversing valve separate separately machined, overall processing
At high cost, lathe, personnel's occupancy are more, and assembling line is more.And although the present invention process valve body, process time prolong
It is long, but lathe and personnel needed for directly eliminating processing backwash valve body, while saving the assembly stream of backwash filter
Waterline.
3, the electromagnetic priority valve of existing selection is there are two types of (reversal valve DXF04 type backwashes DXF03 type), and model is more, no
It is mating conducive to producing in batches；And electromagnetic priority valve used in the present invention only has a kind of (DXF04 type), model is unified, and it is raw to be conducive to batch
Produce supporting management.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the A-A of Fig. 1 to step profile structural schematic diagram.
Fig. 3 is the B-B cross-section structure diagram of Fig. 1.
Fig. 4 is the C-C of Fig. 1 to the schematic diagram of the section structure.
Fig. 5 is the D-D of Fig. 1 to step profile structural schematic diagram.
Fig. 6 is the overlooking structure diagram of Fig. 1.
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiment of the present invention, the present embodiment before being with technical solution of the present invention
It puts and is implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to down
State embodiment.
As shown in figures 1 to 6, the automatic backwashing type electro-hydraulic reversing valve of the present invention for hydraulic support for low coal seam, including
Valve body inlet 2, valve body liquid return hole 3, backwash outlet 4 and multiple electromagnetic priority valves 5 on valve body 1 is arranged in valve body 1.
It is provided with multipair electro-hydraulic reversing valve core assembly 6.1,6.2, first and second in valve body 1 and backwashes control valve core component
7.1,7.2, one element kit 8, one are returned liquid open circuit core assembly 9；Each electro-hydraulic reversing valve core assembly 6.1,6.2, it is anti-
Washing control valve core assembly 7.1,7.2, element kit 8 and return liquid open circuit core assembly 9 and be separately positioned in respective valve chamber；Often
A electromagnetic priority valve 5 respectively corresponds a pair of of electro-hydraulic reversing valve core assembly 6.1,6.2 of control and acts, for controlling hydraulic jack
(or hydraulic vertical prop) stretches, and the on-off forms of control the first and second backwashes control valve core components 7.1,7.2, is used for
Strainer 8.1 in element kit 8 and strainer 8.2 are backwashed.
As shown in Fig. 2, valve body inlet 2 and backwash outlet 4 backwash valve chamber with the first backwash valve chamber, second respectively
Connection；First, second backwash valve chamber offers the first fluid-through port 7.3, the second fluid-through port communicated with filter core valve chamber respectively
7.4；First, second backwash control valve core component 7.1,7.2 is respectively used to application valve body inlet 2, backwash outlet 4 and the
One, the on-off of the second fluid-through port 7.3,7.4.
As shown in Fig. 3,5, filter core valve chamber is divided into B1 chamber 8.5, C chamber 8.6 and B2 chamber 8.7 by element kit 8；B1 chamber 8.5
It is connected to the first backwash valve chamber by the first liquid-passing hole 7.3 and passes through the first filtering net cylinder 8.1 and be connected to C chamber 8.6；B2 chamber
8.7, which backwash valve chamber with second by the second liquid-passing hole 7.4, is connected to and passes through the second filtering net cylinder 8.2 and be connected to C chamber 8.6；C
Chamber 8.6 is connected to the working hole of each electro-hydraulic reversing valve chamber respectively by third liquid-passing hole 8.3, and each electro-hydraulic reversing valve chamber returns
Liquid mouth passes through the 4th liquid-passing hole 6.3 respectively and is connected to the inlet for returning liquid open circuit valve chamber, returns the liquid return hole and valve of liquid open circuit valve chamber
Body liquid return hole 3 is connected to.
As shown in figure 3, element kit 8 includes intermediate sleeve 8.4, the runner of cross-shaped structure is offered in intermediate sleeve 8.4 to structure
At C chamber 8.6；First, second filtering net cylinder 8.1,8.2 is set in the opposite sides of intermediate sleeve 8.4, the first, second filtering
The barrel chamber of net cylinder 8.1,8.2 is communicated and is communicated by mesh with corresponding B1 chamber 8.5, B2 chamber 8.7 with C chamber 8.6 respectively.
Working principle of the present invention is summarized as follows:
As shown in figures 1 to 6, when normal feed liquor works, highly pressurised liquid flows into the first backwash valve chamber, second instead from valve body inlet 2
Valve chamber is rinsed, the valve rod in the first, second backwash control valve core component 7.1,7.2 is resetted under action of reset spring, blocked
Valve body inlet 2 is opened in backwash outlet 4, and highly pressurised liquid is respectively through A1 chamber 7.10, the A2 chamber 7.7 in two valve rods 7.6,7.9
Afterwards, B1 chamber 8.5, the B2 chamber 8.7 for entering filter core valve chamber by the first fluid-through port 7.3, the second fluid-through port 7.4 respectively, such as Fig. 3 institute
Show.The mesh for passing through the first, second filtering net cylinder 8.1,8.2 respectively into the highly pressurised liquid in B1 chamber 8.5, B2 chamber 8.7 is laggard
Enter C chamber 8.6, the inlet of a pair of of electro-hydraulic reversing valve chamber is entered through third liquid-passing hole 8.3 into the highly pressurised liquid of C chamber 8.6, is such as schemed
Shown in 5.Due to this to electro-hydraulic reversing valve core assembly 6.1,6.2 by the control of a corresponding electromagnetic priority valve 5, electro-hydraulic reversing valve
Conical surface seal at two is arranged in core assembly 6.1,6.2 on valve rod to reset when electro-hydraulic reversing valve core assembly 6.1,6.2 does not work
Spring acts on lower valve rod and resets, the working chamber 6.4,6.5 and third liquid-passing hole 8.3(high pressure of electro-hydraulic reversing valve core assembly 6.1,6.2
Feed liquor) it blocks, liquid is returned with the 4th liquid-passing hole 6.3() be connected to.When electromagnetic priority valve 5 must be electric, controlled in the electromagnetic priority valve 5
Under, electro-hydraulic reversing valve core assembly 6.1(or 6.2) in valve rod overcome action of reset spring, move right, at this time third liquid-passing hole
8.3 are connected to valve rod working chamber 6.4(or 6.5), highly pressurised liquid enter electro-hydraulic reversing valve core assembly 6.1 working chamber 6.4(or into
Enter the working chamber 6.5 of electro-hydraulic reversing valve core assembly 6.2), to realize highly pressurised liquid to hydraulic jack (or hydraulic vertical prop)
Output, driving hydraulic jack (or hydraulic vertical prop) are flexible.
As shown in Figure 4,5, when working chamber 6.4 is connected to the inlet of hydraulic jack, working chamber 6.5 and hydraulic jack
The liquid return hole on top is connected；The highly pressurised liquid being discharged from hydraulic jack liquid return hole enters back liquid open circuit through the 4th liquid-passing hole 6.3
The inlet of valve chamber, and pass through back liquid open circuit core assembly 9 and enter in valve body liquid return hole 3, it is (or hydraulic to complete a hydraulic jack
Column) movement.
As shown in Figure 2,3, when element kit 8 backwashes (electro-hydraulic reversing valve core assembly 6.1,6.2 does not work).Assuming that pair
The first filtering net cylinder 8.1 in B1 chamber 8.5 is backwashed, and the electromagnetic priority valve 5 corresponding to control backwash acts, high pressure liquid
Body flows into K1 chamber 7.5, and the valve rod 7.6 of control the first backwash control valve core component 7.1 overcomes return spring pressure to move right
Valve body inlet 2 is closed, backwash outlet 4 is opened；Highly pressurised liquid can only flow into the second backwash from valve body inlet 2 at this time
The A2 chamber 7.7 of control valve core component 7.2 reaches B2 chamber 8.7, after the second filtering net cylinder 8.2 after the second liquid-passing hole 7.4
Into C chamber 8.6；Electro-hydraulic reversing valve core assembly 6.1,6.2 does not work when due to backwash, and it is logical that highly pressurised liquid does not enter third
Fluid apertures 8.3 but enter C chamber 8.6 after reversely flow into B1 chamber 8.5, using the first fluid-through port 7.3 from backwash outlet 4 outflow,
So that 8.1 outside dirt of the first filtering net cylinder takes backwash outlet 4 out of by highly pressurised liquid, the first mistake to element kit 8 is realized
The unilateral backwash of screen tube 8.1.
Similarly, electromagnetism when being backwashed to the second filtering net cylinder 8.2 in B2 chamber 8.7, corresponding to control backwash
Pilot valve 5 acts, and highly pressurised liquid flows into K2 chamber 7.8, and the valve rod 7.9 of control the second backwash control valve core component 7.2 overcomes multiple
Position spring pressure, which is moved right, closes valve body inlet 2, backwashes 4 opening of outlet；At this time highly pressurised liquid can only from valve body into
Liquid mouth 2 flows into the A1 chamber 7.10 of the first backwash control valve core component 7.1, and B1 chamber is reached after the first liquid-passing hole 7.3
8.5, enter C chamber 8.6 through the first filtering net cylinder 8.1, electro-hydraulic reversing valve core assembly 6.1,6.2 does not work when due to backwash, because
This highly pressurised liquid does not enter third liquid-passing hole 8.3 but reversely flows into B2 chamber 8.7 after entering C chamber 8.6, using the second fluid-through port
7.4 from 4 outflow of backwash outlet, so that 8.2 outside dirt of the second filtering net cylinder takes backwash outlet 4 out of by highly pressurised liquid, it is real
It is now unilateral to the second filtering net cylinder of element kit 8 8.2 to backwash.
Claims (2)
1. a kind of automatic backwashing type electro-hydraulic reversing valve for hydraulic support for low coal seam, it is characterised in that: including valve body, setting
Valve body inlet, valve body liquid return hole, backwash outlet and multiple electromagnetic priority valves on the valve body；It is provided in valve body more
Liquid open circuit spool is returned to electro-hydraulic reversing valve core assembly, the first and second backwash control valve core components, an element kit, one
Component；Each electro-hydraulic reversing valve core assembly, backwash control valve core component, element kit and time liquid open circuit core assembly
It is separately positioned in respective valve chamber；Each electromagnetic priority valve controls a pair of of electro-hydraulic reversing valve core assembly movement respectively, uses
In the flexible of control hydraulic jack or hydraulic vertical prop, and the on-off shapes of control the first and second backwashes control valve core components
Formula, for being backwashed to screen tube in element kit；The valve body inlet and backwash outlet recoil with first respectively
Wash valve chamber, the second backwash valve chamber connection；The first, second backwash valve chamber offers the communicated with filter core valve chamber respectively
One fluid-through port, the second fluid-through port；First, second backwash control valve core component is respectively used to application valve body inlet, backwash
The on-off of outlet and first, second fluid-through port；The filter core valve chamber is divided into B1 chamber, C chamber and B2 chamber by element kit；Institute
It states B1 chamber valve chamber is backwashed with first by the first liquid-passing hole and be connected to and pass through the first filtering net cylinder and be connected to the C chamber；It is described
B2 chamber is connected to the second backwash valve chamber by the second liquid-passing hole and passes through the second filtering net cylinder and is connected to C chamber；C chamber passes through the
Three liquid-passing holes are connected to the working hole of each electro-hydraulic reversing valve chamber respectively, the liquid return hole of each electro-hydraulic reversing valve chamber respectively with
The inlet connection of liquid open circuit valve chamber is returned, the liquid return hole of described time liquid open circuit valve chamber is connected to the valve body liquid return hole.
2. being used for the automatic backwashing type electro-hydraulic reversing valve of hydraulic support for low coal seam according to claim 1, it is characterised in that:
The element kit includes intermediate sleeve, and the C chamber is provided in the intermediate sleeve, and C chamber is cross flow passage structure；Described
One, the second filtering net cylinder is set with the opposite sides in intermediate sleeve, the barrel chamber of the first, second filtering net cylinder respectively with C chamber phase
Lead to and pass through mesh and is communicated with the corresponding B1 chamber, B2 chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903553.0A CN110513510A (en) | 2019-09-24 | 2019-09-24 | Automatic backwashing type electro-hydraulic reversing valve for hydraulic support for low coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903553.0A CN110513510A (en) | 2019-09-24 | 2019-09-24 | Automatic backwashing type electro-hydraulic reversing valve for hydraulic support for low coal seam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110513510A true CN110513510A (en) | 2019-11-29 |
Family
ID=68633560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910903553.0A Pending CN110513510A (en) | 2019-09-24 | 2019-09-24 | Automatic backwashing type electro-hydraulic reversing valve for hydraulic support for low coal seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513510A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4469594A (en) * | 1982-11-12 | 1984-09-04 | Harnischfeger Corporation | High pressure hydraulic system and self-cleaning filter assembly therefor |
| JPH10339120A (en) * | 1997-05-30 | 1998-12-22 | Man B & W Diesel As | Hydraulic cleaning method, for hydraulic system for cylinder in multi-cylinder internal combustion engine and hydraulic system thereof |
| JP2007268430A (en) * | 2006-03-31 | 2007-10-18 | Nachi Fujikoshi Corp | Automatic backwashing filtration apparatus |
| CN101629589A (en) * | 2009-06-01 | 2010-01-20 | 北京天地玛珂电液控制系统有限公司 | Integral plugged electric-hydraulic control reversing valve with classified filtering function |
| CN103277540A (en) * | 2013-06-24 | 2013-09-04 | 山西平阳广日机电有限公司 | Mining intrinsically safe electric hydraulic control reversing valve |
| CN103285646A (en) * | 2013-06-24 | 2013-09-11 | 山西平阳广日机电有限公司 | Automatic backwashing filter |
| CN203363333U (en) * | 2013-06-24 | 2013-12-25 | 山西平阳广日机电有限公司 | Automatic backwash high-pressure filtering device valve body |
| CN103835733A (en) * | 2014-03-25 | 2014-06-04 | 郑州煤机液压电控有限公司 | Back flushing filter for underground coal mine hydraulic support |
| CN109395449A (en) * | 2018-12-13 | 2019-03-01 | 丰隆高科液压股份有限公司 | A kind of air water two-way hydraulic control back-flushing filter |
| CN210950035U (en) * | 2019-09-24 | 2020-07-07 | 郑州煤机液压电控有限公司 | Automatic back-flushing type electro-hydraulic reversing valve for thin coal seam hydraulic support |
-
2019
- 2019-09-24 CN CN201910903553.0A patent/CN110513510A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4469594A (en) * | 1982-11-12 | 1984-09-04 | Harnischfeger Corporation | High pressure hydraulic system and self-cleaning filter assembly therefor |
| JPH10339120A (en) * | 1997-05-30 | 1998-12-22 | Man B & W Diesel As | Hydraulic cleaning method, for hydraulic system for cylinder in multi-cylinder internal combustion engine and hydraulic system thereof |
| JP2007268430A (en) * | 2006-03-31 | 2007-10-18 | Nachi Fujikoshi Corp | Automatic backwashing filtration apparatus |
| CN101629589A (en) * | 2009-06-01 | 2010-01-20 | 北京天地玛珂电液控制系统有限公司 | Integral plugged electric-hydraulic control reversing valve with classified filtering function |
| CN103277540A (en) * | 2013-06-24 | 2013-09-04 | 山西平阳广日机电有限公司 | Mining intrinsically safe electric hydraulic control reversing valve |
| CN103285646A (en) * | 2013-06-24 | 2013-09-11 | 山西平阳广日机电有限公司 | Automatic backwashing filter |
| CN203363333U (en) * | 2013-06-24 | 2013-12-25 | 山西平阳广日机电有限公司 | Automatic backwash high-pressure filtering device valve body |
| CN103835733A (en) * | 2014-03-25 | 2014-06-04 | 郑州煤机液压电控有限公司 | Back flushing filter for underground coal mine hydraulic support |
| CN109395449A (en) * | 2018-12-13 | 2019-03-01 | 丰隆高科液压股份有限公司 | A kind of air water two-way hydraulic control back-flushing filter |
| CN210950035U (en) * | 2019-09-24 | 2020-07-07 | 郑州煤机液压电控有限公司 | Automatic back-flushing type electro-hydraulic reversing valve for thin coal seam hydraulic support |
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Address after: 450016 No.167, 9th Street, Zhengzhou area (Jingkai), Zhengzhou pilot Free Trade Zone, Henan Province Applicant after: Zhengzhou Hengda Intelligent Control Technology Co.,Ltd. Address before: 450016 No.167, 9th Street, Zhengzhou area (Jingkai), Zhengzhou pilot Free Trade Zone, Henan Province Applicant before: HYDRAULIC & ELECTRIC CONTROL EQUIPMENT CO LTD ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. |