CN110513510B - Automatic back flushing type electrohydraulic reversing valve for hydraulic support of thin coal seam - Google Patents
Automatic back flushing type electrohydraulic reversing valve for hydraulic support of thin coal seam Download PDFInfo
- Publication number
- CN110513510B CN110513510B CN201910903553.0A CN201910903553A CN110513510B CN 110513510 B CN110513510 B CN 110513510B CN 201910903553 A CN201910903553 A CN 201910903553A CN 110513510 B CN110513510 B CN 110513510B
- Authority
- CN
- China
- Prior art keywords
- cavity
- valve
- liquid
- back flushing
- valve body
- 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.)
- Active
Links
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 60
- 239000003245 coal Substances 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 119
- 230000000712 assembly Effects 0.000 claims abstract description 17
- 238000000429 assembly Methods 0.000 claims abstract description 17
- 239000008358 core component Substances 0.000 claims description 5
- 239000000306 component Substances 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims description 2
- 238000005065 mining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012827 research and development 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 OR ROCK 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 OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses an automatic back flushing type electro-hydraulic reversing valve for a low coal seam hydraulic support, which comprises a valve body, a valve body liquid inlet, a valve body liquid return port, a back flushing outlet and a plurality of electromagnetic pilot valves, wherein the valve body liquid inlet, the valve body liquid return port, the back flushing outlet and the electromagnetic pilot valves are arranged on the valve body; a plurality of pairs of electro-hydraulic reversing valve core assemblies, a first back flushing control valve core assembly, a filter element assembly and a liquid return circuit breaking valve core assembly are arranged in the valve body; each electrohydraulic reversing valve core assembly, the backwash control valve core assembly, the filter core assembly and the liquid return circuit breaking valve core assembly are respectively arranged in respective valve cavities; each electromagnetic pilot valve respectively controls the action of a pair of electro-hydraulic reversing valve core assemblies and controls the on-off mode of the first and second back flushing control valve core assemblies, and the electromagnetic pilot valve is used for back flushing the filter screen cylinder in the filter element assemblies. The invention has the advantages that the automatic back flushing filter of the existing thin coal seam hydraulic support is omitted, and the overall arrangement space is greatly reduced; meanwhile, an assembly line of the back flushing filter is omitted.
Description
Technical Field
The invention relates to a thin coal seam hydraulic support, in particular to an automatic back flushing type electrohydraulic reversing valve for the thin coal seam hydraulic support.
Background
In recent years, along with the development of coal mine industry, the construction of high-yield and high-efficiency fully-mechanized coal mining face is more and more, along with the continuous increase of the one-time mining height of coal seams, the mining of thin high-quality coal seams is also attracting attention, and as one of main supporting equipment of the fully-mechanized coal mining face of the thin coal seams, the research and development of the thin coal seam hydraulic support are put in front of the world.
Because of the limitation of the supporting space of the thin coal seam hydraulic support, the valve type selected by the support is required to meet the use requirement, the volume is reduced as much as possible, and particularly, the placement position of the electrohydraulic reversing valve with larger volume and the electric back flushing filter on the support is a difficult point of the design of the thin coal seam hydraulic support. In order to solve the problem, at present, an electrohydraulic reversing valve is fixed on a support top beam, and an automatic back flushing filter is arranged at the crotch part of a support base. This makes the hydraulic piping, control cable distance between automatic backwash filter and electrohydraulic reversing valve longer, namely: the liquid outlet of the automatic back flush filter is connected with the liquid inlet of the electro-hydraulic reversing valve through a high-pressure rubber pipe and a pipeline piece, high-pressure oil enters the main filter element from the working inlet of the automatic back flush filter through a back flush valve string, enters the electro-hydraulic reversing valve through the high-pressure rubber pipe, and then enters all liquid supply interfaces through the control of each group of functional electromagnetic pilot valves of the electro-hydraulic reversing valve to realize the single-side liquid inlet of the jack. The cost of the liquid inlet rubber pipe, the pipeline piece and the U-shaped clamp is increased, and meanwhile, the cable for driving the electromagnetic pilot valve is longer and is easy to tear off to cause shutdown accidents.
Disclosure of Invention
The invention aims to provide an automatic back flushing type electrohydraulic reversing valve for a thin coal seam hydraulic support, which reduces the manufacturing cost on the premise of meeting the installation space requirement of the thin coal seam hydraulic support.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention relates to an automatic back flushing type electro-hydraulic reversing valve for a thin coal seam hydraulic support, which comprises a valve body, a valve body liquid inlet, a valve body liquid return port, a back flushing outlet and a plurality of electromagnetic pilot valves, wherein the valve body liquid inlet, the valve body liquid return port, the back flushing outlet and the electromagnetic pilot valves are arranged on the valve body; a plurality of pairs of electro-hydraulic reversing valve core assemblies, a first back flushing control valve core assembly, a filter element assembly and a liquid return circuit breaking valve core assembly are arranged in the valve body; each electro-hydraulic reversing valve core assembly, each backwash control valve core assembly, each filter core assembly and each liquid return circuit breaking valve core assembly are respectively arranged in each valve cavity; each electromagnetic pilot valve respectively controls a pair of electro-hydraulic reversing valve core components to act and is used for controlling the expansion and contraction of a hydraulic jack or a hydraulic upright column and controlling the on-off mode of the first and second back flushing control valve core components to back flush a filter screen cylinder in the filter element components; the liquid inlet and the back flush outlet of the valve body are respectively communicated with the first back flush valve cavity and the second back flush valve cavity; the first back flushing valve cavity and the second back flushing valve cavity are respectively provided with a first liquid port and a second liquid port which are communicated with the filter element valve cavity; the first back flush control valve core assembly and the second back flush control valve core assembly are respectively used for controlling the on-off of a liquid inlet and a back flush outlet of the valve body and the first liquid outlet and the second liquid outlet; the filter element assembly divides the filter element valve cavity into a B1 cavity, a C cavity and a B2 cavity; the cavity B1 is communicated with the first back flushing valve cavity through a first liquid through hole and is communicated with the cavity C through a first filter screen cylinder; the cavity B2 is communicated with the second back flushing valve cavity through a second liquid through hole and is communicated with the cavity C through a second filter screen cylinder; the C cavity is respectively communicated with the working port of each electrohydraulic reversing valve cavity through a third liquid through hole, the liquid return port of each electrohydraulic reversing valve cavity is respectively communicated with the liquid inlet of the liquid return breaking valve cavity, and the liquid return port of the liquid return breaking valve cavity is communicated with the liquid return port of the valve body.
The filter element assembly comprises a middle sleeve, the C cavity is arranged in the middle sleeve, and the C cavity is of a cross-shaped flow passage structure; the first filter screen cylinder and the second filter screen cylinder are respectively sleeved on two opposite sides of the middle sleeve, and cylinder cavities of the first filter screen cylinder and the second filter screen cylinder are respectively communicated with the C cavity and are communicated with the corresponding B1 cavity and the corresponding B2 cavity through meshes.
The advantages of the invention are mainly represented by the following aspects:
1. The automatic back flushing filter of the existing thin coal seam hydraulic support is omitted, and the overall arrangement space is greatly reduced; meanwhile, a hydraulic pipeline, a control cable and a U-shaped clamp between the automatic backwashing filter and the electro-hydraulic reversing valve are omitted, the manufacturing cost is saved, and the arrangement of the cable of the driver is centralized and attractive.
2. From the manufacturing perspective, the existing automatic back flushing filter and the electro-hydraulic reversing valve are separately and independently processed, so that the overall processing cost is high, the machine tool and personnel occupy more, and the assembly line is more. The invention only processes the integrated valve body, and the processing time is prolonged, but the machine tool and personnel required for processing the back flushing valve body are directly saved, and the assembly line of the back flushing filter is also saved.
3. The existing electromagnetic pilot valves are two types (DXF 04 type for reversing valve and back flushing DXF03 type), and the types are multiple, so that the electromagnetic pilot valves are not beneficial to batch production matching; the electromagnetic pilot valve used in the invention has only one type (DXF 04 type), has uniform model, and is beneficial to the matched management of batch production.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the A-A stepped cross-section of FIG. 1.
Fig. 3 is a schematic view of the B-B cross-sectional structure of fig. 1.
Fig. 4 is a schematic view of the C-C cross-sectional structure of fig. 1.
Fig. 5 is a schematic view of the D-D stepped cross-section structure of fig. 1.
Fig. 6 is a schematic top view of fig. 1.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings, and the embodiments and specific operation procedures are given by the embodiments of the present invention under the premise of the technical solution of the present invention, but the scope of protection of the present invention is not limited to the following embodiments.
As shown in fig. 1-6, the automatic back flushing type electro-hydraulic reversing valve for the thin coal seam hydraulic support comprises a valve body 1, a valve body liquid inlet 2, a valve body liquid return port 3, a back flushing outlet 4 and a plurality of electromagnetic pilot valves 5, wherein the valve body liquid inlet 2, the valve body liquid return port 3 and the back flushing outlet 4 are arranged on the valve body 1.
A plurality of pairs of electro-hydraulic reversing valve core assemblies 6.1 and 6.2, a first back flushing control valve core assembly 7.1 and a second back flushing control valve core assembly 7.2, a filter element assembly 8 and a liquid return circuit breaking valve core assembly 9 are arranged in the valve body 1; each electrohydraulic reversing valve core assembly 6.1 and 6.2, the back flushing control valve core assemblies 7.1 and 7.2, the filter core assembly 8 and the back flushing breaking valve core assembly 9 are respectively arranged in respective valve cavities; each electromagnetic pilot valve 5 is used for controlling the action of a pair of electro-hydraulic reversing valve core assemblies 6.1 and 6.2 respectively, controlling the extension and retraction of a hydraulic jack (or a hydraulic upright column), controlling the on-off mode of the first and second back flushing control valve core assemblies 7.1 and 7.2 and carrying out back flushing on a filter screen 8.1 and a filter screen 8.2 in the filter core assembly 8.
As shown in fig. 2, the liquid inlet 2 and the back flushing outlet 4 of the valve body are respectively communicated with a first back flushing valve cavity and a second back flushing valve cavity; the first back flushing valve cavity and the second back flushing valve cavity are respectively provided with a first liquid port 7.3 and a second liquid port 7.4 which are communicated with the filter element valve cavity; the first back flush control valve core assembly 7.1 and the second back flush control valve core assembly 7.2 are respectively used for controlling the on-off of the liquid inlet 2 and the back flush outlet 4 of the valve body and the first liquid outlet 7.3 and the second liquid outlet 7.4.
As shown in fig. 3 and 5, the cartridge assembly 8 divides the cartridge valve cavity into a B1 cavity 8.5, a C cavity 8.6 and a B2 cavity 8.7; the cavity B1 is communicated with the first back flushing valve cavity through a first liquid through hole 7.3 and is communicated with the cavity C8.6 through a first filter screen cylinder 8.1; the cavity B2 is communicated with a second back flushing valve cavity through a second liquid through hole 7.4 and is communicated with the cavity C8.6 through a second filter screen cylinder 8.2; the C cavity 8.6 is respectively communicated with the working port of each electrohydraulic reversing valve cavity through a third liquid through hole 8.3, the liquid return port of each electrohydraulic reversing valve cavity is respectively communicated with the liquid inlet port of the liquid return circuit breaker valve cavity through a fourth liquid through hole 6.3, and the liquid return port of the liquid return circuit breaker valve cavity is communicated with the liquid return port 3 of the valve body.
As shown in fig. 3, the filter element assembly 8 comprises a middle sleeve 8.4, and a runner with a cross-shaped structure is arranged in the middle sleeve 8.4 so as to form a C cavity 8.6; the first and second filter screen barrels 8.1 and 8.2 are respectively sleeved on two opposite sides of the middle sleeve 8.4, and barrel cavities of the first and second filter screen barrels 8.1 and 8.2 are respectively communicated with the C cavity 8.6 and are communicated with the corresponding B1 cavity 8.5 and B2 cavity 8.7 through meshes.
The working principle of the invention is briefly described as follows:
As shown in fig. 1-6, when the normal liquid feeding works, high-pressure liquid flows into the first back flushing valve cavity and the second back flushing valve cavity from the liquid inlet 2 of the valve body, the valve rods in the first back flushing control valve core assembly 7.1 and the second back flushing control valve core assembly 7.2 are reset under the action of the reset spring, the back flushing outlet 4 is blocked, the liquid inlet 2 of the valve body is opened, and after the high-pressure liquid respectively passes through the A1 cavity 7.10 and the A2 cavity 7.7 in the two valve rods 7.6 and 7.9, the high-pressure liquid respectively enters the B1 cavity 8.5 and the B2 cavity 8.7 of the valve cavity of the filter core through the first liquid through hole 7.3 and the second liquid through hole 7.4, as shown in fig. 3. The high-pressure liquid entering the B1 cavity 8.5 and the B2 cavity 8.7 respectively passes through the meshes of the first filter screen cylinder 8.1 and the second filter screen cylinder 8.2 and then enters the C cavity 8.6, and the high-pressure liquid entering the C cavity 8.6 enters the liquid inlets of a pair of electrohydraulic reversing valve cavities through the third liquid through holes 8.3, as shown in figure 5. Because the pair of electrohydraulic reversing valve core assemblies 6.1 and 6.2 are controlled by the corresponding electromagnetic pilot valve 5, two conical surface seals are arranged on valve rods of the electrohydraulic reversing valve core assemblies 6.1 and 6.2, when the electrohydraulic reversing valve core assemblies 6.1 and 6.2 do not work, the valve rods reset under the action of a reset spring, and working cavities 6.4 and 6.5 of the electrohydraulic reversing valve core assemblies 6.1 and 6.2 are blocked by a third liquid through hole 8.3 (high-pressure liquid inlet) and are communicated with a fourth liquid through hole 6.3 (liquid return). When the electromagnetic pilot valve 5 is powered on, under the control of the electromagnetic pilot valve 5, the valve rod in the electrohydraulic reversing valve core assembly 6.1 (or 6.2) overcomes the action of the return spring to move rightwards, at the moment, the third hydraulic through hole 8.3 is communicated with the valve rod working cavity 6.4 (or 6.5), and high-pressure liquid enters the working cavity 6.4 of the electrohydraulic reversing valve core assembly 6.1 (or enters the working cavity 6.5 of the electrohydraulic reversing valve core assembly 6.2), so that the output of the high-pressure liquid to the hydraulic jack (or hydraulic upright) is realized, and the hydraulic jack (or hydraulic upright) is driven to stretch.
As shown in fig. 4 and 5, when the working chamber 6.4 is communicated with the liquid inlet of the hydraulic jack, the working chamber 6.5 is communicated with the liquid return port of the hydraulic jack; high-pressure liquid discharged from a liquid return port of the hydraulic jack enters a liquid inlet of a liquid return circuit breaker valve cavity through a fourth liquid through hole 6.3 and enters a liquid return port 3 of a valve body through a liquid return circuit breaker valve core assembly 9, so that the action of the hydraulic jack (or a hydraulic upright post) is completed.
As shown in fig. 2 and 3, when the filter element assembly 8 is backwashed (electro-hydraulic reversing valve cartridge assemblies 6.1, 6.2 are not operating). Assuming that the first filter screen cylinder 8.1 in the cavity B1 is backwashed, corresponding to the action of the electromagnetic pilot valve 5 for controlling the backwashed, high-pressure liquid flows into the cavity K1 7.5, and the valve rod 7.6 for controlling the first backwashed control valve core assembly 7.1 moves rightwards to close the liquid inlet 2 of the valve body and open the backwashed outlet 4 against the pressure of the return spring; at this time, the high-pressure liquid can only flow into the A2 cavity 7.7 of the second backwash control valve core assembly 7.2 from the valve body liquid inlet 2, reaches the B2 cavity 8.7 after passing through the second liquid through hole 7.4, and enters the C cavity 8.6 after passing through the second filter screen barrel 8.2; because the electro-hydraulic reversing valve core assemblies 6.1 and 6.2 do not work during back flushing, high-pressure liquid does not enter the third liquid through hole 8.3 but enters the C cavity 8.6 and then reversely flows into the B1 cavity 8.5, and then flows out of the back flushing outlet 4 through the first liquid through hole 7.3, so that dirt on the outer side of the first filter screen cylinder 8.1 is brought out of the back flushing outlet 4 by the high-pressure liquid, and one-side back flushing of the first filter screen cylinder 8.1 of the filter element assembly 8 is realized.
Similarly, when the second filter screen cylinder 8.2 in the cavity B2 is backwashed, high-pressure liquid flows into the cavity K2 corresponding to the action of the electromagnetic pilot valve 5 for controlling the backwashed, and the valve rod 7.9 for controlling the second backwashed control valve core assembly 7.2 overcomes the pressure of the return spring to move rightwards to close the liquid inlet 2 of the valve body and open the backwashed outlet 4; at this time, the high-pressure liquid can only flow into the A1 cavity 7.10 of the first back flush control valve core assembly 7.1 from the valve body liquid inlet 2, reaches the B1 cavity 8.5 after passing through the first liquid through hole 7.3, and enters the C cavity 8.6 through the first filter screen cylinder 8.1, and because the electro-hydraulic reversing valve core assemblies 6.1 and 6.2 do not work during back flush, the high-pressure liquid reversely flows into the B2 cavity 8.7 after entering the C cavity 8.6 without entering the third liquid through hole 8.3, and flows out of the back flush outlet 4 through the second liquid through hole 7.4, so that dirt outside the second filter screen cylinder 8.2 is carried out of the back flush outlet 4 by the high-pressure liquid, and the single-side back flush of the second filter screen cylinder 8.2 of the filter core assembly 8 is realized.
Claims (2)
1. An automatic back flush type electrohydraulic reversing valve for a hydraulic support of a thin coal seam, which is characterized in that: the valve comprises a valve body, a valve body liquid inlet, a valve body liquid return port, a back flushing outlet and a plurality of electromagnetic pilot valves, wherein the valve body liquid inlet, the valve body liquid return port, the back flushing outlet and the plurality of electromagnetic pilot valves are arranged on the valve body; a plurality of pairs of electro-hydraulic reversing valve core assemblies, a first back flush control valve core assembly, a second back flush control valve core assembly, a filter element assembly and a liquid return circuit breaking valve core assembly are arranged in the valve body; each electro-hydraulic reversing valve core assembly, each backwash control valve core assembly, each filter core assembly and each liquid return circuit breaking valve core assembly are respectively arranged in each valve cavity; each electromagnetic pilot valve respectively controls a pair of electro-hydraulic reversing valve core components to act and is used for controlling the expansion and contraction of a hydraulic jack or a hydraulic upright column and controlling the on-off modes of the first back flush control valve core component and the second back flush control valve core component and is used for back flushing a filter screen cylinder in the filter element component; the liquid inlet and the back flush outlet of the valve body are respectively communicated with the first back flush valve cavity and the second back flush valve cavity; the first back flushing valve cavity and the second back flushing valve cavity are respectively provided with a first liquid port and a second liquid port which are communicated with the filter element valve cavity; the first back flush control valve core assembly and the second back flush control valve core assembly are respectively used for controlling the on-off of a liquid inlet and a back flush outlet of the valve body and the first liquid port and the second liquid port; the filter element assembly divides the filter element valve cavity into a B1 cavity, a C cavity and a B2 cavity; the cavity B1 is communicated with the first back flushing valve cavity through a first liquid through hole and is communicated with the cavity C through a first filter screen cylinder; the cavity B2 is communicated with the second back flushing valve cavity through a second liquid through hole and is communicated with the cavity C through a second filter screen cylinder; the C cavity is respectively communicated with the working port of each electrohydraulic reversing valve cavity through a third liquid through hole, the liquid return port of each electrohydraulic reversing valve cavity is respectively communicated with the liquid inlet of the liquid return breaking valve cavity, and the liquid return port of the liquid return breaking valve cavity is communicated with the liquid return port of the valve body.
2. An automatic backwash electro-hydraulic reversing valve for a low seam hydraulic support according to claim 1 wherein: the filter element assembly comprises a middle sleeve, the C cavity is arranged in the middle sleeve, and the C cavity is of a cross-shaped flow passage structure; the first filter screen cylinder and the second filter screen cylinder are respectively sleeved on two opposite sides of the middle sleeve, and cylinder cavities of the first filter screen cylinder and the second filter screen cylinder are respectively communicated with the C cavity and are communicated with the corresponding B1 cavity and the corresponding B2 cavity through meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903553.0A CN110513510B (en) | 2019-09-24 | 2019-09-24 | Automatic back flushing type electrohydraulic reversing valve for hydraulic support of thin coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910903553.0A CN110513510B (en) | 2019-09-24 | 2019-09-24 | Automatic back flushing type electrohydraulic reversing valve for hydraulic support of thin coal seam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110513510A CN110513510A (en) | 2019-11-29 |
| CN110513510B true CN110513510B (en) | 2024-04-30 |
Family
ID=68633560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910903553.0A Active CN110513510B (en) | 2019-09-24 | 2019-09-24 | Automatic back flushing type electrohydraulic reversing valve for hydraulic support of thin coal seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513510B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB406688A (en) * | 1932-08-02 | 1934-03-02 | Herman Alexander Brassert | Improvements in or relating to screening or filtering apparatus |
| 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 |
| JP2003342976A (en) * | 2002-05-29 | 2003-12-03 | Shin Caterpillar Mitsubishi Ltd | Fluid purifying apparatus of fluid pressure circuit |
| 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 |
| CN102072224A (en) * | 2011-01-28 | 2011-05-25 | 浙江中煤矿业有限公司 | High and low-pressure backwashing filter device for hydraulic bracket |
| 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 |
| CN108278239A (en) * | 2018-04-28 | 2018-07-13 | 北京博望盛达商贸有限公司 | Effectively reduce the Full automatic bus lift frame hydraulic system of return oil pressure |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101658741B (en) * | 2009-09-28 | 2011-05-04 | 郑业 | Reflow backwashing mechanism for automatic filtration of fluid |
-
2019
- 2019-09-24 CN CN201910903553.0A patent/CN110513510B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB406688A (en) * | 1932-08-02 | 1934-03-02 | Herman Alexander Brassert | Improvements in or relating to screening or filtering apparatus |
| 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 |
| JP2003342976A (en) * | 2002-05-29 | 2003-12-03 | Shin Caterpillar Mitsubishi Ltd | Fluid purifying apparatus of fluid pressure circuit |
| 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 |
| CN102072224A (en) * | 2011-01-28 | 2011-05-25 | 浙江中煤矿业有限公司 | High and low-pressure backwashing filter device for hydraulic bracket |
| 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 |
| CN108278239A (en) * | 2018-04-28 | 2018-07-13 | 北京博望盛达商贸有限公司 | Effectively reduce the Full automatic bus lift frame hydraulic system of return oil pressure |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 常宝瑞 ; .液压支架液压系统的优化设计.机电工程技术.(12),215-217. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110513510A (en) | 2019-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201606344U (en) | Double-acting multistage hydraulic cylinder | |
| CN102213201B (en) | High-efficiency concrete or coal slurry conveying system, control method thereof, and two-position three-way hydraulically-controlled directional control valve applied to high-efficiency concrete or coal slurry conveying system | |
| CN109798270B (en) | Multi-mode energy-saving servo actuator and method for realizing multi-mode energy saving | |
| CN109099018A (en) | A kind of Multifunction shuttle conveyer energy-saving hydraulic control system | |
| CN201711034U (en) | Backwash filter | |
| CN2793329Y (en) | Manual double-connected switching valve with hydraulic control | |
| CN112628231A (en) | Automatic drilling control valve group, control system and control method thereof | |
| CN110513510B (en) | Automatic back flushing type electrohydraulic reversing valve for hydraulic support of thin coal seam | |
| CN210950035U (en) | Automatic back-flushing type electro-hydraulic reversing valve for thin coal seam hydraulic support | |
| CN110094382B (en) | Hydraulic control system of quick-change device | |
| CN217682521U (en) | Coal mine high-pressure filtering, energy-storing and liquid-supplying integrated device | |
| CN204371377U (en) | The hydraulic system of emulsion is reclaimed for coal-face | |
| CN101519972B (en) | One-way sequence valve and bracket hydraulic sequence control system using same | |
| CN207080447U (en) | Synchronous hydraulic corrects system | |
| CN111155579B (en) | Folding bulldozer blade, control system and bulldozer | |
| CN105065357A (en) | Electro-hydraulic directional valve | |
| CN209309030U (en) | A kind of Multifunction shuttle conveyer energy-saving hydraulic control system | |
| CN208997051U (en) | A kind of plug support frame quick pressure releasing control loop | |
| CN103691176A (en) | Remote control type backwashing filter | |
| CN106150530A (en) | Hydraulic prop prop raising tool | |
| CN201963629U (en) | Two-position four-way hydraulic control reversing valve | |
| CN113250728B (en) | Hydraulic support pressurizing and flow increasing liquid supply system | |
| CN215171154U (en) | Sixteen-cylinder synchronous control device | |
| CN204061387U (en) | A kind of safety door protective gear | |
| CN203272273U (en) | Novel double-acting supercharger |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201123 Address after: 450016 No. ninth, 167 Avenue, Zhengzhou Economic Development Zone, Henan, China Applicant after: HYDRAULIC & ELECTRIC CONTROL EQUIPMENT CO LTD ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. Applicant after: ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. Address before: 450016 No. ninth, 167 Avenue, Zhengzhou Economic Development Zone, Henan, China Applicant before: HYDRAULIC & ELECTRIC CONTROL EQUIPMENT CO LTD ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220714 Address after: 450016 No.167, 9th Street, Zhengzhou area (Jingkai), Zhengzhou pilot Free Trade Zone, Henan Province Applicant after: HYDRAULIC & ELECTRIC CONTROL EQUIPMENT CO LTD ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. Address before: No.167, 9th Street, Zhengzhou Economic Development Zone, Henan Province, 450016 Applicant before: HYDRAULIC & ELECTRIC CONTROL EQUIPMENT CO LTD ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. Applicant before: ZHENGZHOU COAL MINING MACHINERY GROUP Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
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. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |