CN104728203B - A kind of electric-hydraulic control reversing valve with internal pressure relief function - Google Patents
A kind of electric-hydraulic control reversing valve with internal pressure relief function Download PDFInfo
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- CN104728203B CN104728203B CN201510134203.4A CN201510134203A CN104728203B CN 104728203 B CN104728203 B CN 104728203B CN 201510134203 A CN201510134203 A CN 201510134203A CN 104728203 B CN104728203 B CN 104728203B
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- valve
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- hydraulic control
- reversing valve
- load
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A kind of electric-hydraulic control reversing valve with internal pressure relief function, including electromagnetic priority valve, valve body, off-load valve element, reversing valve core；It is characterized in that：The off-load valve element passes through electromagnetic priority valve control, realize the electric-hydraulic control reversing valve liquid-supplying system high pressure and low-pressure state switching, the master of the off-load valve element back flow channel and the electric-hydraulic control reversing valve returns liquid phase and led to, and the feed pathway of the off-load valve element is communicated with oil sources.Electric-hydraulic control reversing valve of the present invention simplifies system oil-way, and compact conformation is easy to use, realizes safe and accurate, quick, the reliable control of coal-winning machine action.
Description
Technical field
The present invention relates to the electric-hydraulic control reversing valve for mine shearer hydraulic system, more particularly to one kind is with excessive
Flow voltage stabilizing, off-load, return the Integral electric hydraulic control reversal valve of liquid separation, external accumulator and accumulator pressure relief.
Background technology
Coal-winning machine is a kind of mechanical, coal mining machinery equipment that electric, hydraulic system is highly integrated, is underground coal mine fully-mechanized mining working
The crucial composition of equipment, safe, the highly efficient and productive exploitation to coal is significant.In general, coal-winning machine is functionally
Four parts can be divided into：Cutting units, tractive unit, motor and electrical control gear and other servicing units.Wherein, cut
Portion is made up of the part such as rocking arm, roller, for realizing that coal cutting is acted, with single roller, two kinds of patterns of twin-roll；Tractive unit is used for
Control coal making machine is back and forth walked along scratch board conveyor；Coal-winning machine servicing unit includes bottom bracket, Roller shear and oblique adjusting device, broken
The parts such as broken mechanism, cooling spray system, auxiliary completes coal winning technology, ensures the normal operation of coal-winning machine.In addition, for work
Face inclination angle is more than 15 ° of situation, is typically also provided with brake.
Solenoid directional control valve is configured with hydraulic system on coal-winning machine, to the rocking arm of coal-winning machine, brake, disintegrating machine, top
Backplate etc. carries out action control.The solenoid directional control valve come into operation at present on coal-winning machine has two classes：One kind is regular tap formula
Solenoid directional control valve, because electromagnetic valve work pressure is low, differs greatly with working connection, need to be further provided with an oil pump for magnetic valve feed flow,
Add system complexity；It is plate connecting type between each solenoid directional control valve, it is structure bulky, not compact enough；Another is electric-hydraulic proportion
Multiple directional control valve, control characteristic is better than former, but completely from external import, cost is higher.
Guide's solenoid directional control valve of monoblock type of the prior art, such as CN85202016U, it is diaphragm valve, structure letter
Single, shock resistance is poor, is unsuitable for the working environment of underground, and without unloading function, it is impossible to it is Guaranteed for coal-winning machine；And
The solenoid directional control valves such as CN202790679U, CN201521675U, then do not possess the ability for setting multi-way reversing valve element, it is impossible to realize
The functions such as zero-bit off-load, time liquid separation, SC service ceiling system is more, can not equally meet the work of the jumboes such as silo shearer
Need.
Therefore, this area urgent need is a kind of can carry out the electromagnetic pilot-operated reversal valve of off-load commutation, to meet underground work
The control of face coal-winning machine needs.
The content of the invention
It is an object of the invention to propose a kind of to be mainly used in coal-mining machine hydraulic system, with the electro-hydraulic of internal pressure relief function
Reversal valve is controlled, the control for components such as the rocking arm of coal-winning machine, brake, disintegrating machine, top backplate, brake system.
The purpose of the present invention is achieved through the following technical solutions：
The electric-hydraulic control reversing valve of internal pressure relief function includes valve body, electromagnetic priority valve, overflow valve, off-load valve element, reversal valve
Core, oil return separating component, check valve, accumulator, stop valve, the off-load valve element, reversing valve core, oil return separating component,
Accumulator, stop valve are arranged on commutation valve body, compact conformation；
The off-load valve element is each connected with reversing valve core feed liquor with oil pump；The off-load valve element passes through electromagnetic priority valve control
System, oil pump can connect or disconnected with fuel tank by inner passage, and system pressure is reduced as close to 0, system under connected state
In unloading condition, it is possible to decrease system power dissipation；Under off-state, system pressure is that oil sources sets pressure；The reversing valve core is defeated
Outlet can be connected by pipeline with coal-winning machine corresponding component, control coal-winning machine action；
The oil return separating component can return selected some reversing valve cores the isolation of liquid path, individually return liquid, prevent back liquid
The negative effect that back pressure is likely to result in system；
The check valve liquid outlet is connected by accumulator with accumulator, and off-load valve element unloading condition or oil sources disappear
Afterwards, the high pressure fuel source locking of check valve liquid outlet side can be kept its pressure for a long time by check valve, to be carried out to selected action
Quick response；
The stop valve can removal energy storage pressure when needed, it is ensured that safeguard security.
A kind of hydraulic system of coal-winning machine, it is characterised in that：Including above-mentioned monoblock type coal-winning machine electric-hydraulic control reversing valve.
Integral electric hydraulic control reversal valve of the present invention simplifies system oil-way, and compact conformation is easy to use, realizes
Safe and accurate, quick, the reliable control of coal-winning machine action.
Brief description of the drawings
Fig. 1 is the principle of the preferred embodiment one according to the electric-hydraulic control reversing valve of the present invention with internal pressure relief function
Figure；
Fig. 2 is the main view of the preferred embodiment one according to the electric-hydraulic control reversing valve of the present invention with internal pressure relief function
Figure；
Fig. 3 looks up for the preferred embodiment one according to the electric-hydraulic control reversing valve of the present invention with internal pressure relief function
Figure；
Fig. 4 is the connection diagram between off-load valve element and oil pump, fuel tank；
Fig. 5 is back the connection diagram of liquid resolution element；
Fig. 6 is check valve, the connection diagram of accumulator；
Fig. 7 is the connection diagram of stop valve, accumulator and liquid return hole；
Fig. 8 is the schematic diagram of the embodiment two of the electric-hydraulic control reversing valve with internal pressure relief function；
Fig. 9 is the implementation structural representation of the embodiment two of the electric-hydraulic control reversing valve with internal pressure relief function.
Embodiment
Done further with reference to a pair of monoblock type coal-winning machine electric-hydraulic control reversing valves of the present invention of preferred embodiment
Describe in detail.
Fig. 1 is the schematic diagram of the preferred embodiment one of the monoblock type coal-winning machine electric-hydraulic control reversing valve；Electric-hydraulic control reversing valve bag
Include valve body 1, electromagnetic priority valve 2, overflow valve 3, off-load valve element 4, the first reversing valve core 5-1, the second reversing valve core 5-2, time liquid point
Constituted from element 6, check valve 7, accumulator 8, stop valve 9；Electromagnetic priority valve 2, overflow valve 3, off-load valve element 4, three
One reversing valve core 5-1, the second reversing valve core 5-2, time liquid resolution element 6, check valve 7, accumulator 8, stop valve 9 are respectively provided with
In same valve body 1.There are inlet P, two liquid return hole T1 and T2, P mouthfuls of connection oil pumps on valve body 1, T1 and T2 mouthfuls connect oil respectively
Case, specific annexation can be found in Fig. 2 and Fig. 3.
Off-load valve core inside contains switch valve, when electromagnetic priority valve is failure to actuate, and P mouthfuls are connected through switch valve with T2 mouthfuls, connects
Oil pump and fuel tank；During electromagnetic pilot valve events, high voltage control fluid access switch valve rear portion remains turned-off switch valve, P mouthfuls with
T2 mouthfuls obstructed, disconnects oil pump and fuel tank, and specific annexation can be found in Fig. 4；Liquid resolution element 6 is returned to disconnect between T1 and T2 mouthfuls
Passage, realizes back the effect of liquid separation, and specific annexation can be found in Fig. 5；Accumulator 8 is located at after check valve 7, by interior
Portion's path is connected with P mouthfuls, is accumulator topping up；After oil sources disappears, kept for a long time at accumulator 8 by check valve 7
Pressure, specific annexation is referring to Fig. 6；The side of stop valve 9 is connected with accumulator 8, and opposite side leads to liquid return hole T2, leads to
Overall fast pressure relief can be realized by crossing operation stop valve 9；Specific annexation is referring to Fig. 7.
The schematic diagram of embodiment two, as shown in figure 8, when electromagnetic priority valve is powered off, off-load valve element 4 disconnects oil pump and fuel tank
Connection；When electromagnetic priority valve is powered, oil pump is connected with fuel tank；Fig. 9 changes for the Integral electric hydraulic control corresponding to the schematic diagram
Schematic diagram is embodied to one of valve, its difference is that unloading valve in-core has switch valve, when electromagnetic priority valve is failure to actuate, P mouthfuls
It is obstructed with T2 mouthfuls, disconnect oil pump and fuel tank；During electromagnetic pilot valve events, high voltage control fluid access switch valve rear portion, opening is opened
Valve is closed, makes P mouthfuls to be connected with T2 mouthfuls, oil pump and fuel tank is connected.
Including described above, only patent of the present invention preferably embodiment, but the protection domain of patent of the present invention
It is not limited thereto, any one skilled in the art, can be easily in the technical scope of patent diselosesll of the present invention
The change or replacement expected, should all cover within the protection domain of patent of the present invention.
Claims (3)
1. a kind of electric-hydraulic control reversing valve with internal pressure relief function, including electromagnetic priority valve, valve body, off-load valve element, reversal valve
Core, time liquid resolution element；It is characterized in that：The electric-hydraulic control reversing valve includes at least one described off-load valve element and multiple institutes
State reversing valve core；The off-load valve element by electromagnetic priority valve control, realize the electric-hydraulic control reversing valve liquid-supplying system high pressure and
Low-pressure state switches, and the master of the off-load valve element back flow channel and the electric-hydraulic control reversing valve returns liquid phase and led to, the off-load valve element
Feed pathway communicated with oil sources；Check valve and accumulator, the list are provided with the feed pathway of the reversing valve core
Communicated to the liquid outlet of valve with the accumulator, the feed pathway phase of the inlet of the check valve and the off-load valve element
It is logical；Described time liquid resolution element is located at the back flow channel of the off-load valve element and the reversing valve core, realizes arbitrarily selected change
Separated to valve element back flow channel.
2. there is the electric-hydraulic control reversing valve of internal pressure relief function as claimed in claim 1, it is characterised in that：Also include cut-off
Valve, the side of the stop valve is communicated with the accumulator；One of the stop valve opposite side and the reversing valve core
Back flow channel is communicated.
3. a kind of hydraulic system of coal-winning machine, it is characterised in that：Including there is internal pressure relief as described in claim 1-2 is any
The electric-hydraulic control reversing valve of function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134203.4A CN104728203B (en) | 2015-03-26 | 2015-03-26 | A kind of electric-hydraulic control reversing valve with internal pressure relief function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134203.4A CN104728203B (en) | 2015-03-26 | 2015-03-26 | A kind of electric-hydraulic control reversing valve with internal pressure relief function |
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| Publication Number | Publication Date |
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| CN104728203A CN104728203A (en) | 2015-06-24 |
| CN104728203B true CN104728203B (en) | 2017-11-07 |
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| CN201510134203.4A Active CN104728203B (en) | 2015-03-26 | 2015-03-26 | A kind of electric-hydraulic control reversing valve with internal pressure relief function |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917120B (en) * | 2017-11-03 | 2019-12-10 | 北京天地玛珂电液控制系统有限公司 | pilot-operated electromagnetic reversing valve |
| CN109114058B (en) * | 2018-09-13 | 2020-05-26 | 北京天地玛珂电液控制系统有限公司 | Unloading device of hydraulic system |
| CN110566180B (en) * | 2019-10-08 | 2020-05-19 | 西南石油大学 | Guide hydraulic control system of deepwater testing tubular column safety device |
| CN114718925B (en) * | 2022-04-26 | 2023-04-07 | 北京天玛智控科技股份有限公司 | Three-stage hydraulic speed regulating system and hydraulic support |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2311605Y (en) * | 1997-11-13 | 1999-03-24 | 朱宏敏 | Drilling flat car three linkage control valve |
| JP2003106305A (en) * | 2001-09-28 | 2003-04-09 | Kobelco Contstruction Machinery Ltd | Gyrating control circuit |
| CN101526441B (en) * | 2009-04-23 | 2011-04-20 | 北京天地玛珂电液控制系统有限公司 | Large-flow safety valve test system |
| CN202251199U (en) * | 2011-10-20 | 2012-05-30 | 常德中联重科液压有限公司 | Electro-hydraulic proportional combined maneuvering valve |
| CN102734247B (en) * | 2012-07-13 | 2013-04-03 | 三一重工股份有限公司 | Flow control system and method of multi-way directional valve and engineering machinery |
| CN203394737U (en) * | 2013-05-13 | 2014-01-15 | 飞翼股份有限公司 | Concrete delivery pump integrated valve block with high-and-low voltage switching function |
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Effective date of registration: 20201027 Address after: 100013 Beijing, Hepingli Youth ditch East Road, building No. 5, room and floor, No. 131, No. Patentee after: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. Patentee after: BEIJING MEIKE TIANMA AUTOMATION SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 100013, Beijing, Chaoyang District, Hepingli Youth ditch East Road, building 5, one floor Patentee before: BEIJING MEIKE TIANMA AUTOMATION SCIENCE & TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |
Address after: No.131, ground floor, Tiandi building, No.5, qingniangou East Road, Hepingli, Chaoyang District, Beijing 100013 Patentee after: Beijing Tianma Zhikong Technology Co.,Ltd. Patentee after: Beijing coal technology Tianma Automation Technology Co., Ltd Address before: No.131, ground floor, Tiandi building, No.5, qingniangou East Road, Hepingli, Chaoyang District, Beijing 100013 Patentee before: BEIJING TIANDI-MARCO ELECTRO-HYDRAULIC CONTROL SYSTEM Co.,Ltd. Patentee before: Beijing coal technology Tianma Automation Technology Co., Ltd |