CN1125247C - Explosive-proof electromagnetic valve - Google Patents
Explosive-proof electromagnetic valve Download PDFInfo
- Publication number
- CN1125247C CN1125247C CN 99104634 CN99104634A CN1125247C CN 1125247 C CN1125247 C CN 1125247C CN 99104634 CN99104634 CN 99104634 CN 99104634 A CN99104634 A CN 99104634A CN 1125247 C CN1125247 C CN 1125247C
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- end cap
- valve
- spool
- valve body
- spring
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Abstract
The present invention relates to a fluid pressure executing mechanism which is provided with a valve body, an upper end cap, a lower end cap and a wet electromagnet, wherein the valve body, the upper end cap, the lower end cap and the wet electromagnet are connected into a whole by screw nuts; the upper end cap and the lower end cap are arranged at the upper end and the lower end of a valve body, while the wet electromagnet is arranged at the lower end of the lower end cap. The inner cavity of the valve body is provided with two lug bosses, a valve core is positioned on a valve seat, wherein a spring seat is arranged above the valve core lug boss; a precompression spring is arranged between the valve core lug boss and the spring seat; a fastening screw is arranged at the upper end of the spring seat; a tail cone of the valve core penetrates through a central hole of the valve seat and contacts a push rod at the lower end; the valve body is provided with an oil inlet channel, an oil outlet channel, an oil return channel and a corresponding oil port. The present invention has the advantages of good dynamic performance, good manufacture technology, convenient realization of automatic control, and simple structure. The present invention can be matched with hydraulic systems of various classes.
Description
The present invention relates to a kind of solenoid valve that is used for hydraulic system.
In existing hydraulic system, owing to be in work under the high pressure for a long time, be used for the flexible pipe and the parts explosion suddenly easily of oil circuit, and the hydraulic system that is in operation, oil hydraulic pump are still running up, thereby a large amount of hydraulic oil are outwards sprayed, not only cause energy waste, befouling environment, and initiation fire very easily.The remedial measure of at present the problems referred to above being taked is to cut off the electricity supply immediately.But because hydraulic system is enclosed, in case system breaks down, when treating that operator judge fault, the oil in the fuel tank has leaked.The hydraulic system of full-automatic unmanned operation at this moment, problem will be more serious.The inventor proposes a kind of when in the hydraulic system oil circuit explosion taking place in the CN94239836.X patent, can block the anti-exploding leakage valve of working connection automatically, it is made up of valve body, valve pocket ring, end cover, spring, spool, with spool is connected as a single entity the spool boss arranged, valve body has some runners, between hydraulic system and pumping source, design a fuel-displaced valve port, moving down by a spring of spool realizes automatically, can prevent to reach the purpose of automatic cut-off leakage of oil because of flexible pipe in the oil circuit or a large amount of leakage of oils of the unexpected explosion of parts.Its Placement is all and is threaded, and spring force can not be regulated, and the driving armrest of spool is moving, and difficult the realization controlled automatically, and can produce dead volume between spool and end cover, so need to increase a pair of orthogonal drain charge aperture, technology realizes than difficult.
The object of the present invention is to provide good, the easy realization of a kind of dynamic characteristic control automatically, good manufacturability, simple in structure, can with the matching used modified model explosive-proof electromagnetic valve of existing all kinds of hydraulic systems.
The present invention is provided with valve body, upper end cap, lower end cap, wet electro-magnet, and is connected as a single entity through fastening, and end cap is located at the upper and lower end of valve body respectively up and down, and wet electro-magnet is located at the lower end of lower end cap.Body cavity is established 2 boss, establishes spool in valve body, and spool is positioned on the valve seat, and spool is the guiding valve of a separate unit rank band poppet spool valve, with valve body be Spielpassung, have balancing slit on the spool boss; Establish spring seat above the spool boss, establish precompressed spring between spool boss and spring seat, the spring seat upper end is established and is pressed closer screw, to regulate its pre-pressing force.The spool lower end is a cone, and tail cone is extended in the cone lower end, and tail cone passes the center hole of valve seat, contacts with the lower end push rod that establish the lower end of spool.Valve body is established into and out of, back oil road with into and out of, return opening, the external oil pump of filler opening, the external hydraulic system working connection of oil outlet, the outer connected tank of return opening.
With CN94239836.X patent (hereinafter to be referred as former patent) relatively, two types valve all is to utilize before and after system's generation explosion, work is carried out in the variation of oil outlet pressure.Its something in common is that the both must with lower end push rod jack-up, drive spool and move upward before filler opening import fluid, and compression upper end spring.Treat that spool reaches maximum displacement, oil outlet is opened fully, and return opening is closed fully, imports high-voltage oil liquid again.System pressure removes external force after setting up.During to the downward elastic force of spool, spool can be in normal working to the back pressure that this moment, fluid made progress to the lower end cone valve more than or equal to the upper end spring.In case because certain fault causes oil outlet pressure to reduce, when the elastic force of spring during greater than the counterpressure that acts on the spool, spool is closed oil outlet immediately, return opening is opened, and realizes explosion-proof, purpose of energy saving.But both have very big difference, mainly are:
1) on the action mechanism of spool, the present invention is owing to have only a step on the spool, valve arrangement is simple, good manufacturability, eliminated former patent because dead volume that double step brought (former patent must be established a compensating groove newly, to eliminate dead volume), thereby closed when oil outlet opens return opening at spool, high-voltage oil liquid will be by the valve inner oil circuit spool upper end guiding valve of flowing through, and to very big down pressure of guiding valve effect.Spool is just closed oil outlet and is opened return opening under the force action of this pressure and upper end spring force.And former patent is depended merely on the elastic force effect of spring and is closed oil outlet.Therefore, the present invention is sensitiveer than former patent, and the actuation time of valve is shorter, thereby has improved the dynamic characteristic of valve greatly.
2) the present invention has realized automatic control, and spool adopts electromagnetism moving, has overcome former patent and has pulled the inconvenience that wrench brings by manpower.And the present invention can guarantee the range of spool by the rated travel of electromagnet by appropriate apolegamy electromagnet, and former patent is by manually just being difficult to guarantee this point.
3) the present invention is by regulating the distance between upper end nut adjustable springs seat and the spool top, with the working pressure of modulating valve.And former patent will realize this function, then must add a step on end cap, makes the structure of valve become complicated.
4) the present invention adopts electromagnetic switch, and electromagnet is selected wet electro-magnet for use, need not increase special seal element between lower end cap and electromagnet, further simplifies the structure.Former patent in order to prevent to leak, must adopt seal approach owing to adopt manually between lower end cap and push rod.But because the aperture between lower end cap and the push rod is less, the processing of seal groove is difficulty relatively, the bad assurance of precision.
5) electromagnet of the present invention connects with lower end cap, make it highly just be the rated travel of electromagnet at a lower end cap end step of processing (required precision is not high), and before energising, making reservation one gap between lower end push rod and the spool, it highly is the difference of electromagnet range and rated travel.Electromagnet can both be remained under the normal thrust in the whole process that promotion lower end push rod moves upward.
6) total of the present invention is with scyewed joint, and standard piece is many, and non-standard component is few, and physical dimension can be carried out production and processing (as nominal diameter, nominal pressure) by the GB regulation.The non-general part of this valve is relatively simple for structure, as spring seat, valve seat.Spool is the guiding valve of a band cone valve.On the step of guiding valve, have balancing slit, prevent the generation of hydraulic lock phenomenon effectively.The valve inner step is less, and is relatively simple for structure.So, when producing in batches, can adopt casting to carry out the production of blank, the manufacturing efficiency height, cost is low.
7) the present invention is with a wide range of applications, can with the supporting use of existing all kinds of hydraulic systems, be widely used in All aspects of such as Aeronautics and Astronautics, mine, metallurgy, engineering machinery, traveller, and invest for a short time, income is big.This valve one-time investment just can carry out normal production and processing for about 100,000 yuan.If promote 10,000 by annual, 200 yuan of meters of every profit, annual return then can reach 2,000,000 yuan.If precision machining factory (particularly hydraulic parts factory) then can produce immediately, need not to carry out investment in fixed assets, only invest raw material and get final product.
Fig. 1 is a structure diagram of the present invention.
Fig. 2 is the front view of valve seat.
As Fig. 1, shown in 2, this explosive-proof electromagnetic valve comprises valve body 1, upper end cap 2, lower end cap 3, wet electro-magnet 4, by fastening fusing such as cover type nut 5, hexagon nut 6, socket head screw 7 and seal rings.Establish spool 8 in the valve body, spool 8 is positioned on the valve seat 9, establishes spring seat 10 above the spool boss, between spool boss and spring seat, establish a precompressed spring 11, the spring seat upper end is established and is pressed closer screw 12, and the tail cone 81 of spool 8 passes the center through hole 91 of valve seat 9, and contacts with lower end push rod 13.Valve body 1 is established oil input channel 14, oil road 15 and 16,3 oil ducts of back oil road and is established filler opening 17, oil outlet 18 and return opening 19 respectively, filler opening 17 external oil pumps, oil outlet 18 external hydraulic system working connections, the outer connected tank of return opening.Two its diameters of boss of body cavity are identical with spool boss diameter, cooperate with the spool boss to be used to switch return opening.Spool and valve body are Spielpassung, and under the acting in conjunction of upper end spring force and lower end fluid back pressure, realize the mutual switching of return opening and oil outlet.
Claims (4)
1. explosive-proof electromagnetic valve is provided with valve body, end cap, spool, spring, and valve body is established into and out of, back oil road and corresponding hydraulic fluid port, it is characterized in that:
1) said end cap is upper and lower end cap, is located at the upper and lower end of valve body respectively, establishes wet electro-magnet in the lower end cap lower end, and valve body, upper end cap, lower end cap and wet electro-magnet are fastening to fuse;
2) body cavity is established 2 boss, spool is positioned on the valve seat, spool is the guiding valve of a separate unit rank band poppet spool valve, with valve body be Spielpassung, spring seat is established in spool boss top, establishes precompressed spring between spool boss and spring seat, the spring seat upper end is established and is pressed closer screw, the spool lower end is a cone, and tail cone is extended in the cone lower end, and tail cone passes the center hole of valve seat and contacts with the lower end push rod.
2. explosive-proof electromagnetic valve as claimed in claim 1 is characterized in that valve body, upper end cap, lower end cap and wet electro-magnet are linked into an integrated entity by nut.
3. explosive-proof electromagnetic valve as claimed in claim 1 is characterized in that having balancing slit on the spool boss.
4. explosive-proof electromagnetic valve as claimed in claim 1 is characterized in that the external oil pump of filler opening, the external hydraulic system working connection of oil outlet, the outer connected tank of return opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104634 CN1125247C (en) | 1999-05-06 | 1999-05-06 | Explosive-proof electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104634 CN1125247C (en) | 1999-05-06 | 1999-05-06 | Explosive-proof electromagnetic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1235248A CN1235248A (en) | 1999-11-17 |
| CN1125247C true CN1125247C (en) | 2003-10-22 |
Family
ID=5271759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99104634 Expired - Fee Related CN1125247C (en) | 1999-05-06 | 1999-05-06 | Explosive-proof electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1125247C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102478032A (en) * | 2010-11-28 | 2012-05-30 | 嘉兴爱克斯机械技术有限公司 | Auxiliary oil valve |
| CN102168699B (en) * | 2011-04-27 | 2013-08-07 | 杭州和利时自动化有限公司 | Hydraulic interceptor valve |
| CN106762917B (en) * | 2017-03-10 | 2018-09-18 | 湖南鸿辉科技有限公司 | A kind of big flow explosion-proof valve and working method |
| CN106969007B (en) * | 2017-05-21 | 2018-04-13 | 新乡市新倍增自动化设备有限公司 | Explosion-proof emergent Releasing loop |
-
1999
- 1999-05-06 CN CN 99104634 patent/CN1125247C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1235248A (en) | 1999-11-17 |
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| C10 | Entry into substantive examination | ||
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |