CN104728203A - Electro-hydraulic control reversing valve with internal pressure relief function - Google Patents
Electro-hydraulic control reversing valve with internal pressure relief function Download PDFInfo
- Publication number
- CN104728203A CN104728203A CN201510134203.4A CN201510134203A CN104728203A CN 104728203 A CN104728203 A CN 104728203A CN 201510134203 A CN201510134203 A CN 201510134203A CN 104728203 A CN104728203 A CN 104728203A
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- China
- Prior art keywords
- valve
- hydraulic control
- reversing valve
- control reversing
- electric
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- 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 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 230000037361 pathway Effects 0.000 claims 3
- 239000007791 liquid phase Substances 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 6
- 238000005065 mining Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 abstract 1
- 239000010729 system oil Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 239000002828 fuel tank Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides an electro-hydraulic control reversing valve with an internal pressure relief function. The electro-hydraulic control reversing valve comprises electromagnetic pilot operated valves, a valve body, an unloading valve core and a reversing valve core. The electro-hydraulic control reversing valve is characterized in that the unloading valve core is controlled through the electromagnetic pilot operated valves, high-pressure and low-pressure state switching of a liquid supply system of the electro-hydraulic control reversing valve is achieved, a liquid return channel of the unloading valve core is communicated with main returned liquid of the electro-hydraulic control reversing valve, and a liquid inlet channel of the unloading valve core is communicated with an oil source. According to the electro-hydraulic control reversing valve, the system oil way is simplified, the electro-hydraulic control reversing valve is compact in structure and convenient to use, and safe, accurate, fast and reliable control over actions of a coal mining machine is achieved.
Description
Technical field
The present invention relates to the electric-hydraulic control reversing valve for mine shearer hydraulic system, particularly relate to and a kind of there is overflow voltage stabilizing, off-load, return that liquid is separated, the Integral electric hydraulic control selector valve of external accumulator and accumulator pressure relief.
Background technique
The coal mining machinery equipment that coal winning machine is a kind of machinery, electric, hydraulic system height is integrated is the key composition of underground coal mine fully mechanized mining face equipment, significant to safe, the highly efficient and productive exploitation of coal.Generally speaking, coal winning machine functionally can be divided into four parts: cutting portion, tractive unit, motor and electric control equipment and other auxiliary devices.Wherein, cutting portion is made up of the part such as rocking arm, cylinder, for realizing coal cutting action, has single cylinder, twin-roll two profiles formula; Tractive unit is back and forth walked along flight conveyer for controlling coal making machine; Coal winning machine auxiliary device comprises the part such as bottom bracket, Roller shear and oblique adjusting device, crushing mechanism, cooling spray system, has assisted coal winning technology, ensures the normal operation of coal winning machine.In addition, working surface inclination angle is greater than to the situation of 15 °, is usually also equipped with break.
Be configured with solenoid directional control valve in hydraulic system on coal winning machine, action control is carried out to the rocking arm, break, disintegrator, top backplate etc. of coal winning machine.The solenoid directional control valve come into operation on coal winning machine at present has two classes: one is regular tap formula solenoid directional control valve, because electromagnetic valve work pressure is low, differs greatly with working connection, and needing to be equipped with an oil pump is in addition solenoid valve feed flow, adds system complexity; Be plate connecting type between each solenoid directional control valve, structure bulky, compact not; Another kind is electro-hydraulic proportional multi-way reversing valve, and control characteristic is better than front one, but completely from external import, cost is higher.
All-in-one-piece guide's solenoid directional control valve of the prior art, as CN85202016U, it is diaphragm valve, and structure is simple, and shock resistance is poor, is unsuitable for the working environment of down-hole, and does not have unloading function, cannot be used for coal winning machine Guaranteed; And the solenoid directional control valves such as CN202790679U, CN201521675U, then do not possess the ability that multi-way reversing spool is set, cannot realize zero-bit off-load, return the functions such as liquid separation, SC service ceiling system is more, cannot meet the need of work of the jumboes such as silo shearer equally.
Therefore, a kind of electromagnetic pilot-operated selector valve that can carry out off-load commutation is badly in need of in related domain, to meet the control needs of mining face under mine coal winning machine.
Summary of the invention
The object of the invention is to propose a kind of electric-hydraulic control reversing valve being mainly used in coal-mining machine hydraulic system, there is internal pressure relief function, for the control of the component such as rocking arm, break, disintegrator, top backplate, brake system of coal winning machine.
The object of the invention is to be achieved through the following technical solutions:
The electric-hydraulic control reversing valve of internal pressure relief function comprises valve body, electromagnetic priority valve, relief valve, off-load spool, changeover valve core, oil return separating component, one-way valve, accumulator, stop valve, described off-load spool, changeover valve core, oil return separating component, accumulator, stop valve are arranged on commutation valve body, compact structure;
Described off-load spool is connected with oil pump separately with changeover valve core feed liquor; Described off-load spool is controlled by electromagnetic priority valve, to be communicated with by oil pump or to disconnect by inner passage with fuel tank, and under connected state, system pressure reduces as close to 0, and system is in unloading condition, can reduce system power dissipation; Under off state, system pressure is oil sources setting pressure; Described changeover valve core delivery outlet is connected with coal winning machine corresponding part by pipeline, controls coal winning machine action;
Selected some changeover valve cores can be returned the isolation of liquid path by described oil return separating component, return liquid separately, stop back the negative effect that liquid back pressure may cause system;
Described one-way valve liquid outlet is communicated with accumulator by accumulator, and after off-load spool unloading condition or oil sources disappear, one-way valve, by the high pressure fuel source locking of one-way valve liquid outlet side, can keep its pressure for a long time, to respond fast selected action;
Described stop valve can removal energy storage pressure when needed, ensures maintenance safe.
A hydraulic system for coal winning machine, is characterized in that: comprise above-mentioned integrated type coal winning machine electric-hydraulic control reversing valve.
Integral electric hydraulic control selector valve of the present invention simplifies system oil-way, compact structure, easy to use, achieve coal winning machine action safe, accurate, quick, reliably control.
Accompanying drawing explanation
Fig. 1 is according to the schematic diagram with the preferred embodiment one of the electric-hydraulic control reversing valve of internal pressure relief function of the present invention;
Fig. 2 is according to the plan view with the preferred embodiment one of the electric-hydraulic control reversing valve of internal pressure relief function of the present invention;
Fig. 3 is according to the worm's eye view with the preferred embodiment one of the electric-hydraulic control reversing valve of internal pressure relief function of the present invention;
Fig. 4 is the connection diagram between off-load spool and oil pump, fuel tank;
Fig. 5 is back the connection diagram of liquid resolution element;
Fig. 6 is the connection diagram of one-way valve, 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 enforcement structural representation of the embodiment two of the electric-hydraulic control reversing valve with internal pressure relief function.
Embodiment
The integrated type coal winning machine electric-hydraulic control reversing valve that the present invention relates to for a pair below in conjunction with preferred embodiment is described in further detail.
Fig. 1 is the schematic diagram of the preferred embodiment one of described integrated type coal winning machine electric-hydraulic control reversing valve; Electric-hydraulic control reversing valve comprises valve body 1, electromagnetic priority valve 2, relief valve 3, off-load spool 4, first changeover valve core 5-1, the second changeover valve core 5-2, returns liquid resolution element 6, one-way valve 7, accumulator 8, stop valve 9 form; Electromagnetic priority valve 2, relief valve 3, off-load spool 4, three the first changeover valve core 5-1, the second changeover valve core 5-2, time liquid resolution element 6, one-way valve 7, accumulator 8, stop valve 9 are all arranged in same valve body 1.Valve body 1 has liquid entering hole P, two liquid return hole T1 and T2, P mouth connects oil pump, T1 and T2 mouth is connected tank respectively, and concrete annexation can see Fig. 2 and Fig. 3.
Unloading valve core inner contains switch valve, and when electromagnetic priority valve is failure to actuate, P mouth is connected with T2 mouth through switch valve, connects oil pump and fuel tank; During electromagnetic pilot valve events, high voltage control fluid enters switch valve rear portion, and make switch valve keep closing, P mouth and T2 mouth are obstructed, disconnection oil pump and fuel tank, and concrete annexation can see Fig. 4; Return liquid resolution element 6 and disconnect passage between T1 and T2 mouth, realizes back the effect of liquid separation, concrete annexation can see Fig. 5; After accumulator 8 is positioned at one-way valve 7, being connected with P mouth by internal path, is accumulator topping up; After oil sources disappears, keep the pressure at accumulator 8 place for a long time by one-way valve 7, concrete annexation is see Fig. 6; The side of stop valve 9 is connected with accumulator 8, and opposite side leads to liquid return hole T2, can realize overall fast pressure relief by operation stop valve 9; Concrete annexation is see Fig. 7.
The schematic diagram of embodiment two, as shown in Figure 8, when electromagnetic priority valve power-off, off-load spool 4 disconnects the connection of oil pump and fuel tank; During electromagnetic priority valve energising, oil pump and fuel tank are connected; Fig. 9 is that of Integral electric hydraulic control selector valve corresponding to described schematic diagram specifically implements schematic diagram, and its difference is that unloading valve in-core has switch valve, when electromagnetic priority valve is failure to actuate, P mouth and T2 mouth obstructed, disconnection oil pump and fuel tank; During electromagnetic pilot valve events, high voltage control fluid enters switch valve rear portion, opens switch valve, and P mouth is connected with T2 mouth, connects oil pump and fuel tank.
Comprise the above; be only patent of the present invention preferably embodiment; but the protection domain of patent of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope of patent diselosesll of the present invention; the change that can expect easily or replacement, within the protection domain that all should be encompassed in patent of the present invention.
Claims (6)
1. there is an electric-hydraulic control reversing valve for internal pressure relief function, comprise electromagnetic priority valve, valve body, off-load spool, changeover valve core; It is characterized in that: described off-load spool is controlled by electromagnetic priority valve, realize described electric-hydraulic control reversing valve liquid-supplying system high pressure and low-pressure state switching, the master of described off-load spool back flow channel and described electric-hydraulic control reversing valve returns liquid phase and leads to, and the feed pathway of described off-load spool communicates with oil sources.
2. there is the electric-hydraulic control reversing valve of internal pressure relief function as claimed in claim 1, it is characterized in that: described off-load spool has one at least.
3. there is the electric-hydraulic control reversing valve of internal pressure relief function as claimed in claim 2, it is characterized in that: also comprise back liquid resolution element.
4. the electric-hydraulic control reversing valve with internal pressure relief function as described in as arbitrary in claim 1-3, it is characterized in that: the feed pathway of described changeover valve core is provided with one-way valve and accumulator, the liquid outlet of described one-way valve communicates with described accumulator, and the liquid entering hole of described one-way valve communicates with the feed pathway of described off-load spool.
5. the electric-hydraulic control reversing valve with internal pressure relief function as described in as arbitrary in claim 1-3, is characterized in that: also comprise stop valve.
6. a hydraulic system for coal winning machine, is characterized in that: comprise as arbitrary in claim 1-5 as described in the electric-hydraulic control reversing valve with internal pressure relief 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104728203A true CN104728203A (en) | 2015-06-24 |
| CN104728203B CN104728203B (en) | 2017-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917120A (en) * | 2017-11-03 | 2018-04-17 | 北京天地玛珂电液控制系统有限公司 | A kind of type pilot solenoid directional control valve |
| CN109114058A (en) * | 2018-09-13 | 2019-01-01 | 北京天地玛珂电液控制系统有限公司 | The discharge mechanism of hydraulic system |
| CN110566180A (en) * | 2019-10-08 | 2019-12-13 | 西南石油大学 | Guide hydraulic control system of deepwater testing tubular column safety device |
| CN114718925A (en) * | 2022-04-26 | 2022-07-08 | 北京天玛智控科技股份有限公司 | Three-stage hydraulic speed regulating system and hydraulic support |
Citations (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 |
| US20030061743A1 (en) * | 2001-09-28 | 2003-04-03 | Kobelco Construction Machinery Co., Ltd | Rotating control circuit |
| CN101526441A (en) * | 2009-04-23 | 2009-09-09 | 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 |
| CN102734247A (en) * | 2012-07-13 | 2012-10-17 | 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 |
-
2015
- 2015-03-26 CN CN201510134203.4A patent/CN104728203B/en active Active
Patent Citations (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 |
| US20030061743A1 (en) * | 2001-09-28 | 2003-04-03 | Kobelco Construction Machinery Co., Ltd | Rotating control circuit |
| CN101526441A (en) * | 2009-04-23 | 2009-09-09 | 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 |
| CN102734247A (en) * | 2012-07-13 | 2012-10-17 | 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917120A (en) * | 2017-11-03 | 2018-04-17 | 北京天地玛珂电液控制系统有限公司 | A kind of type pilot solenoid directional control valve |
| CN109114058A (en) * | 2018-09-13 | 2019-01-01 | 北京天地玛珂电液控制系统有限公司 | The discharge mechanism of hydraulic system |
| CN110566180A (en) * | 2019-10-08 | 2019-12-13 | 西南石油大学 | Guide hydraulic control system of deepwater testing tubular column safety device |
| 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 |
| CN114718925A (en) * | 2022-04-26 | 2022-07-08 | 北京天玛智控科技股份有限公司 | Three-stage hydraulic speed regulating system and hydraulic support |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104728203B (en) | 2017-11-07 |
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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 CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. Address before: 100013, Beijing, Chaoyang District, Hepingli Youth ditch East Road, building 5, one floor Patentee before: BEIJING CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| 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: CCTEG Beijing Tianma Intelligent Control Technology Co.,Ltd. Patentee after: BEIJING CCRI-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 CCRI-TIANMA AUTOMATION TECHNOLOGY Co.,Ltd. |