CN101761517B - Electromagnetic priority valve - Google Patents
Electromagnetic priority valve Download PDFInfo
- Publication number
- CN101761517B CN101761517B CN2009102545685A CN200910254568A CN101761517B CN 101761517 B CN101761517 B CN 101761517B CN 2009102545685 A CN2009102545685 A CN 2009102545685A CN 200910254568 A CN200910254568 A CN 200910254568A CN 101761517 B CN101761517 B CN 101761517B
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- Prior art keywords
- oil
- cavity
- pilot valve
- valve
- push rod
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- 238000007789 sealing Methods 0.000 claims description 42
- 125000006850 spacer group Chemical group 0.000 claims description 24
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
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Abstract
The invention provides an electromagnetic priority valve (3) which is arranged at the side face of an electric-hydraulic control change valve (2). A control oil cavity B (21), a control oil cavity A (20) and an oil return cavity (19) which are respectively communicated with two ring-isolation closing pieces (10) are arranged on a shell body of a priority valve (5). Longitudinal balancing oil paths (16) and (22) which are communicated with an oil inlet cavity (17) are arranged on the shell body of the priority valve (5). An oil inlet of the priority valve (5) is directly communicated with the upper part of a guide nut closing piece (14) at one side, and is communicated with the upper part of the guide nut closing piece (14) at the other side by the oil inlet cavity (17). The oil return of the priority valve (5) is connected with the lower part of a valve jacket push rod closing piece (7) at the other side by the oil return cavity (19) from the lower part of the valve jacket push rod closing piece (7) at one side, and directly reaches an oil return opening (24) from the lower part of the valve jacket push rod closing piece (7) at the other side; therefore, technology holes and choke plugs are reduced, the structure of the oil paths of the priority valve (5) is simple, the manufacturing is easy, and the installing and disassembling are easy.
Description
Technical Field
The invention relates to the field of hydraulic machinery, in particular to an electromagnetic pilot valve.
Background
The electrohydraulic control system of the hydraulic support for the mine is one of main devices for fully mechanized coal mining automation, and the electrohydraulic control system of the hydraulic support uses an electrohydraulic control reversing valve which consists of a main valve and an electromagnetic pilot valve. The electromagnetic pilot valve is a pilot stage of the reversing main valve, and controls a liquid path of the hydraulic control main valve by pushing a valve core of the main valve to move to an opening position through electromagnetic operation or manual operation through pressure difference so as to realize the on-off and switching of the liquid path, further drive a piston of a hydraulic cylinder and finish the specified action of the hydraulic support.
Mature products have been formed more than a decade ago abroad. Therefore, all foreign manufacturers have own setting products in the aspect of the pilot valve of the electro-hydraulic system. The pilot valve structure of DBT and Marco, JOY, OHE, EEP, DAMS, thefenbach and other companies is different, but the pilot valve is a two-position three-way electromagnetic directional valve with small flow and high pressure bearing.
The popularization of foreign products is mainly based on German products, the German products have certain similarity in structure, the structure is formed by combining electromagnets and pilot valves, and the force application mode is divided into direct pushing and lever type. The German OHE company is a lever type electromagnetic pilot valve, and the structural form of the electromagnetic pilot valve product of the OHE company is shown in figure 1.
Similar products exist in China, the Chinese patent publication No. 201037424 of Zhejiang Fenglong hydraulic component Limited company is named as an electro-hydraulic control reversing valve for a hydraulic support, and the electro-hydraulic control reversing valve comprises three parts, namely an electromagnet, a main control valve and a pilot valve, and is an integral patent. The electromagnetic pilot valve is similar to an OHE electromagnetic pilot valve product in function and structure, and the installation mode and the interface form are the same as those of the OHE electromagnetic pilot valve product.
Because the electromagnetic pilot valve and the main valve of the OHE company adopt a bottom surface mounting mode, the structure of a valve body oil way is complex, a plurality of process holes are formed, a plurality of plugs are used outside the process holes, burrs inside staggered holes are difficult to clean, the processing difficulty is high, and the electromagnetic pilot valve is inconvenient to mount and dismount.
Disclosure of Invention
In order to overcome the defects of complex structure and multiple process holes of a valve body oil way in the prior art, the invention provides an electromagnetic pilot valve.
The invention comprises an electromagnet and a pilot valve. A control oil cavity B and a control oil cavity A which are respectively communicated with the two spacer ring closing members are arranged on the cross section of the middle position of the spacer ring closing member on the shell of the pilot valve, and the outlets of the control oil cavity B and the control oil cavity A are positioned on the same side of the shell. The oil inlet cavity, the oil return cavity, the A control oil cavity and the B control oil cavity are mutually parallel, and outlets of the A control oil cavity and the B control oil cavity are positioned on the same side of the shell. On the shell of the pilot valve, a longitudinal balance oil path is arranged between the two spacer ring fittings. A balance oil cavity is arranged on the cross section of the shell of the pilot valve, which is positioned in the middle of the valve sleeve push rod assembly; two ends of the balance oil cavity are respectively communicated with the internal oil cavities of the two valve sleeve push rod assemblies. An oil return opening, an oil inlet, an A control oil port and a B control oil port are distributed in the middle of one side of a shell of the pilot valve, the oil return opening and the oil inlet are vertically distributed in the middle of the shell of the pilot valve, and the A control oil port and the B control oil port are horizontally distributed in the two sides of the middle of the oil return opening and the oil inlet. The length of the middle push rod is larger than the distance between the two sealing balls when the two sealing balls are simultaneously pressed to the spacer ring.
The balance oil path is from the bottom of the pilot valve shell to the position of the valve sleeve push rod assembly and is communicated with the oil path of the guide nut assembly. The outlet of the balance oil cavity is positioned on the surface of one side of the shell and is sealed by a high-pressure sealing plug. The length of the middle push rod is larger than the distance between the two sealing balls when the two sealing balls are simultaneously pressed to the spacer ring.
The electromagnetic pilot valve is positioned on the side surface of the electro-hydraulic control reversing valve.
In the invention, an internal oil path of the pilot valve directly reaches the upper part of the guide nut assembly at one side from an oil inlet and is communicated with the upper part of the guide nut assembly at the other side by virtue of an oil inlet cavity; the return oil of the pilot valve is communicated with the lower part of the push rod assembly of the valve sleeve at the other side by virtue of an oil return cavity from the lower part of the push rod assembly of the valve sleeve at one side, and is directly led to an oil return port from the lower part of the push rod assembly of the valve sleeve at the other side, and the two control oil ports of the pilot valve are respectively led out from the two control oil cavities by virtue. According to the technical scheme, the communicating oil cavities are not communicated by other process holes, so that the processing of the process holes and the use of plugs are reduced, and the pilot valve oil way is simple in structure and easy to manufacture. The electromagnetic pilot valve and the electro-hydraulic control reversing valve adopt a lateral installation mode, and are convenient to install and disassemble.
Drawings
FIG. 1 is a prior art OHE electromagnetic pilot valve profile;
FIG. 2 is a schematic diagram of an OHE electromagnetic pilot valve in the prior art mounted on an electro-hydraulic directional control valve;
FIG. 3 is a schematic diagram of an electromagnetic pilot valve;
FIG. 4 is a view of the electromagnetic pilot valve in the direction A;
FIG. 5 is an installation schematic diagram of an electromagnetic pilot valve and an electro-hydraulic directional control valve;
FIG. 6 is a schematic structural diagram of a pilot valve;
FIG. 7 is an A-A view of a schematic of a pilot valve configuration;
FIG. 8 is a B-B view of a schematic of a pilot valve configuration;
FIG. 9 is a C-C view of a schematic of a pilot valve configuration;
FIG. 10 is a D-direction view of the pilot valve structure. Wherein,
1. casing 2, electro-hydraulic control reversing valve 3, electromagnetic pilot valve 4, electromagnet 5, pilot valve
6. Lever assembly 7, valve sleeve push rod assembly 8, upper sealing ball 9, middle push rod 10 and spacer ring assembly
11. Lower sealing ball 12, restrictor 13, sealing ring 14, guide nut assembly 15 and high-pressure sealing plug
16. Longitudinal balance oil way 17, oil inlet cavity 18, balance oil way oil inlet cavity 19, oil return cavity 20.A control oil cavity
21, B control oil cavity 22, balance oil cavity 23, electromagnetic pilot valve mounting hole 24, oil return port 25, A control oil port
26. Oil inlet 27.B control oil port
Detailed Description
The embodiment is an electromagnetic pilot valve 3 for a hydraulic support, which comprises an electromagnet 4 and a pilot valve 5.
The pilot valve 5 is a shell member, and an oil inlet cavity 17 and an oil return cavity 19 are arranged in the inner cavity of the pilot valve 5. Two ends of the oil inlet cavity 17 are respectively communicated with the guide nut assembly 14; two ends of the oil return cavity 19 are respectively communicated with the valve sleeve push rod assembly 7. The pilot nut assembly 14 is connected to an external pipeline through the restrictor 12 and sealed by a seal ring 13. One end of the valve sleeve push rod assembly 7 is connected with an external pipeline and sealed through a sealing ring. A spacer ring assembly 10 is connected between the guide nut assembly 14 and the valve sleeve push rod assembly 7. The lever element 6 is located in the upper chamber of the pilot valve 5. The guide nut assembly 14, the valve sleeve push rod assembly 7, the spacer ring assembly 10 and the pilot valve 5 are communicated with each other.
On the shell 1 of the pilot valve 5, a control oil chamber B21 and a control oil chamber A20 which are respectively communicated with the two spacer ring fittings 10 are arranged on the cross section of the middle position of the spacer ring fittings 10, and the outlets of the control oil chamber B21 and the control oil chamber A20 are positioned on the same side of the shell 1; the oil inlet cavity 17, the oil return cavity 19, the A control oil cavity 20 and the B control oil cavity 21 are mutually parallel, and outlets are positioned on the same side of the shell 1;
on the housing 1 of the pilot valve 5, between the two spacer ring elements 10, there is a longitudinal balancing oil channel 16. The balance oil path is from the bottom of the casing of the pilot valve 5 to the valve sleeve push rod assembly 7 and is communicated with the oil path of the guide nut assembly 14.
On the housing 1 of the pilot valve 5, a balance oil chamber 22 communicating the two valve housing push rod assemblies 7 is provided in a cross section at a position in the middle of the valve housing push rod assemblies 7. One end of the balance oil cavity 22 is communicated with the internal oil cavity of one valve sleeve push rod assembly 7, and the other end of the balance oil cavity 22 is communicated with the internal oil cavity of the other valve sleeve push rod assembly 7. The outlet of the balance oil chamber 22 is located on one side surface of the housing 1 and is sealed by the high-pressure sealing plug 15.
Four oil ports, namely an oil return port 24, an oil inlet 26, an A control oil port 25 and a B control oil port 27, are distributed in the middle of one side of the shell 1 of the pilot valve 5, the oil return port 24 and the oil inlet 26 are vertically distributed in the middle of the shell of the pilot valve 5, and the A control oil port 25 and the B control oil port 27 are horizontally distributed in the middle of the oil return port 24 and the oil inlet 26. Four mounting holes 23 connected with the electro-hydraulic control reversing valve 2 are distributed around four oil ports in the middle of one side of the casing 1 of the pilot valve 5, so that the electromagnetic pilot valve 3 is positioned on the side surface of the electro-hydraulic control reversing valve 2.
The working process of the embodiment is as follows: working oil enters the oil inlet cavity 17 of the pilot valve 5 from the oil inlet 26, flows to the balance oil path oil inlet cavity 18 in the oil inlet cavity 17 all the way, and is communicated with the balance oil cavity 22 through the longitudinal balance oil path 16.
When the electromagnet 4 is not electrified, the guide nut assembly 14 props against the lower sealing ball body 11 to tightly press the lower sealing ball body 11 onto the lower sealing surface of the spacer ring assembly 10, so that the oil inlet cavity 17 is separated from the two control oil cavities and the oil return cavity 19 and is sealed, meanwhile, the lower sealing ball body 11 props against the middle push rod 9, the middle push rod 9 props against the upper sealing ball body 8, so that the upper sealing ball body 8 is far away from the upper sealing surface of the spacer ring assembly 10, the two control oil cavities and the oil return cavity 19 are in a communicated state, and the pilot valve is in a closed state.
When the electromagnet 4 at the end far away from the throttler 12 is electrified, the force applied to the lever assembly 6 by the electromagnet 4 is transmitted to the valve sleeve push rod assembly 7 through the lever assembly 6, the valve sleeve push rod assembly 7 pushes the upper sealing sphere 8 to enable the upper sealing sphere 8 to be tightly pressed on the upper sealing surface of the spacer ring assembly 10, meanwhile, the upper sealing sphere 8 props against the middle push rod 9, the middle push rod 9 seals the lower sealing sphere 11 to enable the lower sealing sphere 11 to be separated from the lower sealing surface of the spacer ring assembly 10, the oil inlet cavity 17 is communicated with the A control oil cavity 20, the oil inlet cavity 17 and the A control oil cavity 20 are separated from and sealed with the oil return cavity 19, and the A control oil port 25 of;
similarly, when the electromagnet 4 near the end of the throttle 12 is powered on, the force applied to the lever assembly 6 by the electromagnet 4 is transmitted to the valve sleeve push rod assembly 7 through the lever assembly 6, the valve sleeve push rod assembly 7 pushes the upper sealing ball 8 to enable the upper sealing ball 8 to be tightly pressed onto the upper sealing surface of the spacer ring assembly 10, meanwhile, the upper sealing ball 8 props against the middle push rod 9, the lower sealing ball 11 of the middle push rod 9 is enabled to be separated from the contact between the lower sealing surface of the lower sealing ball 11 and the lower sealing surface of the spacer ring assembly 10, the oil inlet cavity 17 is communicated with the B control oil cavity 21, the oil inlet cavity 17 and the B control oil cavity 21 are separated from and sealed with the oil return cavity 19, and the.
The length of the middle push rod 9 is larger than the distance between the two sealing balls when the two sealing balls are simultaneously pressed to the spacer ring 10.
Claims (4)
1. An electromagnetic pilot valve comprises an electromagnet (4) and a pilot valve (5); an oil inlet cavity (17) and an oil return cavity (19) are arranged in the inner cavity of the pilot valve (5); two ends of the oil inlet cavity (17) are respectively communicated with the two guide nut assemblies (14); two ends of the oil return cavity (19) are respectively communicated with the two valve sleeve push rod assemblies (7); the guide nut assembly (14) is hermetically connected with an external pipeline through the restrictor (12); one end of the valve sleeve push rod assembly (7) is hermetically connected with an external pipeline; spacer ring assemblies (10) are respectively connected between the two guide nut assemblies (14) and the two valve sleeve push rod assemblies (7); the lever assembly (6) is positioned in the upper cavity of the pilot valve (5); the guide nut assembly (14), the valve sleeve push rod assembly (7), the spacer ring assembly (10) and the pilot valve (5) are communicated with each other through oil passages; an upper sealing ball (8) and a lower sealing ball (11) are arranged in the guide nut assembly (14); a middle push rod (9) is arranged between the two upper sealing balls (8) and the lower sealing ball (11); it is characterized in that the preparation method is characterized in that,
a. on the shell of the pilot valve (5), a control oil cavity B (21) and a control oil cavity A (20) which are respectively communicated with the two spacer ring joint pieces (10) are arranged on the cross section of the middle position of the spacer ring joint piece (10), and the outlets of the control oil cavity B (21) and the control oil cavity A (20) are positioned on the same side of the shell; the oil inlet cavity (17), the oil return cavity (19), the A control oil cavity (20) and the B control oil cavity (21) are mutually parallel, and outlets of the A control oil cavity and the B control oil cavity are positioned on the same side of the shell;
b. a longitudinal balance oil path (16) is arranged between the two spacer ring assembly pieces (10) on the shell of the pilot valve (5);
c. a balance oil chamber (22) is arranged on the cross section of the shell of the pilot valve (5) at the middle position of the valve sleeve push rod assembly (7); two ends of the balance oil cavity (22) are respectively communicated with the internal oil cavities of the two valve sleeve push rod assemblies (7);
d. an oil return opening (24), an oil inlet (26), an A control oil opening (25) and a B control oil opening (27) are distributed in the middle of one side of a shell of the pilot valve (5), the oil return opening (24) and the oil inlet (26) are vertically distributed in the middle of the shell of the pilot valve (5), and the A control oil opening (25) and the B control oil opening (27) are horizontally distributed on two sides of the middle of the oil return opening (24) and the oil inlet (26);
e. and a mounting hole (23) of the electro-hydraulic control reversing valve (2) is distributed in one side of the pilot valve (5).
2. An electromagnetic pilot valve as claimed in claim 1, wherein the balancing oil path extends from the bottom of the pilot valve (5) housing to the valve housing push rod assembly (7) and is connected to the oil path of the guide nut assembly (14).
3. The electromagnetic pilot valve as set forth in claim 1, wherein the outlet of the balancing oil chamber (22) is located at one side surface of the housing and sealed by a high pressure sealing plug (15).
4. An electromagnetic pilot valve according to claim 1, characterised in that the length of the intermediate push rod (9) is greater than the distance between the upper sealing ball (8) and the lower sealing ball (11) when they are pressed simultaneously against the spacer ring assembly (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102545685A CN101761517B (en) | 2009-12-29 | 2009-12-29 | Electromagnetic priority valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102545685A CN101761517B (en) | 2009-12-29 | 2009-12-29 | Electromagnetic priority valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101761517A CN101761517A (en) | 2010-06-30 |
| CN101761517B true CN101761517B (en) | 2012-01-11 |
Family
ID=42492866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102545685A Expired - Fee Related CN101761517B (en) | 2009-12-29 | 2009-12-29 | Electromagnetic priority valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101761517B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100589B (en) * | 2014-07-04 | 2016-06-08 | 宁波江东晟创工业产品设计有限公司 | A kind of multidirectional and multifunctional pilot operated valve device fast |
| CN109654089A (en) * | 2017-10-11 | 2019-04-19 | 中国航发西安动力控制科技有限公司 | It is a kind of to design the complex casing structure for having oil circuit |
-
2009
- 2009-12-29 CN CN2009102545685A patent/CN101761517B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101761517A (en) | 2010-06-30 |
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| PB01 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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Owner name: CSIC XI'AN DONGYI SCIENCE TECHNOLOGY + INDUSTRY GR Free format text: FORMER NAME: XI'AN DONGFENG METERS FACTORY |
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| CP01 | Change in the name or title of a patent holder |
Address after: 710065 No. 3 East Road, Yanta District, Shaanxi, Xi'an Patentee after: CSIC XI'AN DONG YI SCIENCE TECHNOLOGY & INDUSTRY GROUP Co.,Ltd. Address before: 710065 No. 3 East Road, Yanta District, Shaanxi, Xi'an Patentee before: Xi'an Dongfeng Instrument Factory |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120111 Termination date: 20211229 |