CN210716205U - Magnetic fluid sealing valve - Google Patents
Magnetic fluid sealing valve Download PDFInfo
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- CN210716205U CN210716205U CN201920743849.6U CN201920743849U CN210716205U CN 210716205 U CN210716205 U CN 210716205U CN 201920743849 U CN201920743849 U CN 201920743849U CN 210716205 U CN210716205 U CN 210716205U
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Abstract
The utility model discloses a magnetic current body seal valve, the magnetic current body seal valve includes the valve body, the end cover, valve pipeline and end cap, terminal surface and end cap up end adopt ball toper cooperation under the valve pipeline, the lower surface bonding of end cap is on the upper surface of electro-magnet, the electro-magnet, excitation coil, spring and valve body constitute an independent solenoid valve, the electro-magnet can be in the up-and-down motion under the produced magnetic field effect of excitation coil, and then drive the end cap motion, accomplish opening of valve device, the closed process, the outside of end cap has sealing coil around, be provided with annular opening formula magnetic current cavity at the valve exit position, there is the magnetic current body in the magnetic current cavity, surface mosaic at magnetic current cavity has the permanent. The utility model discloses device compact structure, it is low to the machining precision demand of sealing member, sealed effectual, valve structure's sealed design has better using value under the big pressure environment.
Description
Technical Field
The utility model relates to a seal valve field especially relates to a magnetic current body seal valve.
Background
Valve devices are a widely used class of basic components in industrial applications, such as gas valves, liquid valves, high-speed valves, precision flow valves, injection valves, etc., which are found everywhere in our daily lives. At present, in addition to consideration of optimization of valve performance, reliability analysis of valve devices is a hot research issue of researchers of today, and the problem is particularly obvious in large-pressure valve devices.
For high pressure liquid valves, it places severe demands on the sealing properties of the valve arrangement. To better meet this need, we can only meet the above need by increasing the machining precision of the sealing element. However, too high machining accuracy will bring about huge machining cost, and the pursuit of high accuracy is also not favorable for mass production and machining.
To the problem of current valve body structure leakproofness to the high accuracy demand of machining, the utility model provides a high reliability magnetic current body seal valve body structure suitable for under the large pressure environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a magnetic current body seal valve.
The utility model provides a magnetic current body seal valve, including the valve body, the end cover, the valve pipeline, end cap and electro-magnet, valve pipeline lower extreme face and end cap up end all adopt ball toper cooperation, the lower surface of end cap bonds on the upper surface of electro-magnet, the electro-magnet, excitation coil, spring and valve body constitute an independent solenoid valve, the electro-magnet can be under the produced magnetic field effect of excitation coil up-and-down motion, and then drive the end cap motion, accomplish opening, the closure process of valve device, the outside of end cap is twined to have sealing coil, be provided with annular opening formula magnetic current cavity in valve pipeline exit position, there is the magnetic current body in the magnetic current cavity, it has the permanent magnet to inlay.
Preferably, the valve body, the end cover, the plug and the electromagnet are made of high-conductivity magnetic steel, a closed magnetic path is provided for the excitation coil to improve the electromagnetic force generated by the electromagnet, and meanwhile, a magnetic path provided by the sealing coil is closed through the valve body, the end cover, the plug and the electromagnet to improve the sealing effect of the valve device.
Preferably, the material of the magnetic fluid cavity is non-magnetic aluminum alloy, the material of the magnetic fluid is MRFDG, and the permanent magnet is strong-magnetic aluminum-iron-boron permanent magnet.
Preferably, the exciting coil and the seal coil both adopt a step-type power supply method, and the exciting coil and the seal coil adopt an interleaved power supply method, wherein the seal coil is energized when the exciting coil is de-energized, and the seal coil is de-energized when the exciting coil is energized, and the action time of energizing and de-energizing the seal coil lags behind 0.5s of the action time of de-energizing and energizing the exciting coil.
Preferably, when the excitation coil is powered off, a two-stage sealing structure is adopted, wherein the valve pipe and the plug are sealed in a mechanical mode of a spherical conical surface, and under the condition of good mechanical sealing effect, namely no air gap exists between the valve pipe and the end face of the plug, the magnetic fluid sealing device cannot be started.
Preferably, when the machining precision is not high or the pressure is too high, if the mechanical sealing effect is not good, an air gap exists between the valve pipeline and the end face of the plug, at this time, the sealing coil is electrified to generate a magnetic field, so that the magnetic fluid leaves the magnetic fluid cavity and enters the air gap between the valve pipeline and the end face of the plug, and after the magnetic fluid enters the air gap, the magnetic fluid is in a high-strength solid state under the action of the magnetic field, so that secondary sealing of the valve body device is realized, and the sealing coil is always in an electrified state.
Preferably, the valve body device operates as follows: when the exciting coil is powered off, the valve pipeline and the end face of the plug are in a mechanical sealing state. At the moment, the sealing coil is electrified, the magnetofluid performs secondary sealing between the valve pipeline and the end face of the plug under the action of a magnetic field generated by the sealing coil, when the valve is switched from a closed state to a conducting state, the excitation coil is electrified, the electromagnet moves downwards under the action of the magnetic field generated by the excitation coil and drives the plug to move downwards at the same time, so that the valve pipeline is separated from the end face of the plug, the excitation coil is electrified, after the excitation coil is electrified for 0.5s, the sealing coil is powered off, the magnetofluid rushes out the valve port under high pressure and deflects in the electromagnetic force generating direction due to the existence of the strong magnetic permanent magnet, the magnetofluid turns to the direction of the permanent magnet so as to enter the magnetofluid cavity, when the excitation coil is powered off again, the electromagnet moves upwards under the action of the spring, the valve pipeline and the end face of, and when the excitation coil is electrified, the sealing coil is powered off, the magnetic fluid flows out from the magnetic fluid cavity to perform supplementary sealing, and the magnetic fluid flows back to the magnetic fluid cavity under the pressure of the fluid and the permanent magnet when the excitation coil is electrified, so that the magnetic fluid is recovered.
Compared with the prior art, the utility model beneficial effect who has:
1) the utility model provides a magnetic current body seal valve can cooperate the use with current valve gear, on current valve gear's basis, adds magnetic current body structure and corresponding seal coil, alright completion is to the secondary seal or the supplementary seal of current valve decoration. The utility model provides a valve seal structure all can use in current valve device.
2) The utility model discloses a magnetic current body seal valve can effectually make the magnetic current body switch operating condition naturally, and when the valve body device closed, the magnetic current body supplyes sealedly, and when the valve body device opened, the device can be better protects magnetic current body and magnetic current body chamber to the work that the valve device can be reliable is closing, opening under two kinds of states, has improved the sealing performance of valve body device under the prerequisite of assurance reliability.
3) The utility model discloses a magnetic current body seal valve has considered the demand of actual valve body device machining precision, can improve on current valve device, and the supporting element of simple and easy processing does, and device sealing performance is good, and the reliability is high, and easily the engineering is used.
Drawings
Figure 1 is a front view of a magnetic fluid sealed valve scheme.
Detailed Description
A magnetic fluid seal valve comprises a valve body 1-1, an end cover 1-2, a valve pipeline 1-3, a plug 1-4 and an electromagnet 1-5, wherein the lower end face of the valve pipeline 1-3 and the upper end face of the plug 1-4 are matched in a spherical conical manner, the lower surface of the plug 1-4 is adhered to the upper surface of the electromagnet 1-5, an excitation coil 1-6, a spring 1-7 and the valve body 1-1 form an independent electromagnetic valve, the electromagnet 1-5 can move up and down under the action of a magnetic field generated by the excitation coil 1-6 to drive the plug 1-4 to move so as to complete the opening and closing processes of a valve device, a seal coil 1-8 is wound on the outer side of the plug 1-4, an annular opening type magnetic fluid cavity 1-9 is arranged at the outlet of the valve pipeline 1-3, magnetic fluid 1-10 is arranged in the magnetic fluid cavity 1-9, and a permanent magnet 1-11 is embedded on the outer surface of the magnetic fluid cavity 1-9.
The valve body 1-1, the end cover 1-2, the plug 1-4 and the electromagnet 1-5 are made of high-conductivity magnetic steel and provide a closed magnetic path for the excitation coil 1-6 to improve the electromagnetic force generated by the electromagnet, meanwhile, a magnetic circuit provided by the sealing coil 1-8 is closed through the valve body 1-1, the end cover 1-2, the plug 1-4 and the electromagnet 1-5 to improve the sealing effect of the valve device, the magnetic fluid cavity 1-9 is made of non-magnetic aluminum alloy, the magnetic fluid 1-10 is made of MRF132-DG, and the permanent magnet 1-11 is made of a strong-magnetic aluminum-iron-boron permanent magnet.
The exciting coil 1-6 and the sealing coil 1-8 both adopt a step type power supply mode, the exciting coil 1-6 and the sealing coil 1-8 adopt an interlaced power supply mode, when the exciting coil 1-6 is powered off, the sealing coil 1-8 is powered on, when the exciting coil 1-6 is powered on, the sealing coil 1-8 is powered off, and the action time of the power-on and power-off of the sealing coil 1-8 lags behind 0.5s of the action time of the power-off and power-on of the exciting coil 1-6.
When the valve device is closed, a two-stage sealing structure is adopted, wherein a mechanical mode of a spherical conical surface is adopted for sealing between the valve pipeline 1-3 and the plug 1-4, under the condition of better mechanical sealing effect, namely no air gap exists between the end surfaces of the valve pipeline 1-3 and the plug 1-4, the magnetic fluid sealing device cannot be started, when the mechanical machining precision is not high or the pressure intensity is overlarge, if the mechanical sealing effect is not good, an air gap exists between the end surfaces of the valve pipeline 1-3 and the plug 1-4, at the moment, the sealing coil 1-8 is electrified to generate a magnetic field, so that the magnetic fluid 1-10 is separated from the magnetic fluid cavity 1-9 and enters the air gap between the end surfaces of the valve pipeline 1-3 and the plug 1-4, and after the magnetic fluid enters the air gap, the magnetic fluid is presented in a high-strength solid state under the action of the magnetic field, in this valve closed state, the sealing coils 1-8 are always in an energized state.
The valve body device works as follows: when the excitation coil 1-6 is powered off, the end faces of the valve pipeline 1-3 and the plug 1-4 are in a mechanical sealing state. At the moment, a sealing coil 1-8 is electrified, the magnetofluid 1-10 performs secondary sealing between the end faces of a valve pipeline 1-3 and a plug 1-4 under the action of a magnetic field generated by the sealing coil 1-8, when an excitation coil 1-6 is electrified, an electromagnet 1-5 moves downwards under the action of the magnetic field generated by the excitation coil 1-6 and simultaneously drives the plug 1-4 to move downwards, so that the end faces of the valve pipeline 1-3 and the plug 1-4 are separated, the excitation coil 1-6 is electrified, after the excitation coil 1-6 is electrified for 0.5s, the sealing coil 1-8 is powered off, the magnetofluid 1-10 is flushed out of a valve port under high pressure due to the electrification of the excitation coil 1-6, and the magnetofluid 1-10 is deflected in the direction by the electromagnetic force due to the existence of a strong magnetic permanent magnet 1-11, turning to the direction of the permanent magnet 1-11, and thus entering the magnetofluid chamber 1-9, when the exciter coil 1-6 is de-energized again, the electromagnets 1-5 move upwards under the action of the spring, the end faces of the valve pipelines 1-3 and the plugs 1-4 are closed, after the exciting coil 1-6 is powered off for 0.5s, the sealing coil 1-8 is powered on, the magnetic fluid 1-10 is sealed for the second time, therefore, when the excitation coil 1-6 is powered off, the sealing coil 1-8 is powered on, the magnetic fluid 1-10 flows out of the magnetic fluid cavity 1-9 for supplementary sealing, when the magnet exciting coil 1-6 is electrified, the sealing coil 1-8 is powered off, and the magnetic fluid 1-10 flows back to the magnetic fluid cavity 1-9 under the fluid pressure and the permanent magnet 1-11, so that the magnetic fluid 1-10 is recycled.
Claims (4)
1. A magnetic fluid sealing valve is characterized by comprising a valve body (1-1), an end cover (1-2), a valve pipeline (1-3), a plug (1-4) and an electromagnet (1-5), wherein the lower end face of the valve pipeline (1-3) and the upper end face of the plug (1-4) are matched in a spherical conical mode, the lower surface of the plug (1-4) is bonded to the upper surface of the electromagnet (1-5), an excitation coil (1-6), a spring (1-7) and the valve body (1-1) form an independent electromagnetic valve, the electromagnet (1-5) can move up and down under the action of a magnetic field generated by the excitation coil (1-6) to drive the plug (1-4) to move so as to complete the opening and closing processes of a valve device, sealing coils (1-8) are wound on the outer sides of the plugs (1-4), annular opening type magnetic fluid cavities (1-9) are arranged at the outlet positions of the valve pipelines (1-3), magnetic fluid bodies (1-10) are arranged in the magnetic fluid cavities (1-9), and permanent magnets (1-11) are embedded on the outer surfaces of the magnetic fluid cavities (1-9).
2. A magnetic fluid sealing valve according to claim 1, characterized in that the material of the valve body (1-1), end cap (1-2), end cap (1-4) and electromagnet (1-5) is high conducting magnetic steel, providing a closed magnetic path for the excitation coil (1-6), so as to improve the electromagnetic force generated by the electromagnet, and simultaneously seal the magnetic circuit provided by the coils (1-8), is closed by a valve body (1-1), an end cover (1-2), a plug (1-4) and an electromagnet (1-5), the sealing effect of the valve device is improved, the magnetic fluid cavities (1-9) are made of non-magnetic aluminum alloy, the magnetic fluid bodies (1-10) are made of MRF132-DG, and the permanent magnets (1-11) are made of strong-magnetic aluminum-iron-boron permanent magnets.
3. A magnetic fluid sealing valve according to claim 1, characterized in that the excitation coil (1-6) and the sealing coil (1-8) both adopt a step-type power supply mode, and the excitation coil (1-6) and the sealing coil (1-8) adopt an interleaved power supply mode, when the excitation coil (1-6) is powered off, the sealing coil (1-8) is powered on, when the excitation coil (1-6) is powered on, the sealing coil (1-8) is powered off, and the action time of powering on and off the sealing coil (1-8) lags behind the action time of powering off and on the excitation coil (1-6).
4. A magnetic fluid sealing valve according to claim 1, characterized in that when the excitation coil (1-6) is de-energized, a two-stage sealing structure is adopted, wherein the valve pipe (1-3) and the plug (1-4) are mechanically sealed by a spherical conical surface, in the case of better mechanical sealing effect, i.e. no air gap exists between the end surfaces of the valve pipe (1-3) and the plug (1-4), the magnetic fluid sealing device will not be started, when the mechanical processing precision is not high or the pressure is too high, if the mechanical sealing effect is not good, an air gap exists between the end surfaces of the valve pipe (1-3) and the plug (1-4), at this time, the sealing coil (1-8) is energized to generate a magnetic field, so that the magnetic fluid (1-10) leaves the magnetic fluid chamber (1-9) and enters the air gap between the end surfaces of the valve pipe (1-3) and the plug (1-4), after the magnetic fluid enters the air gap, the magnetic fluid is presented in a high-strength solid state under the action of a magnetic field, so that secondary sealing of the valve body device is realized, and the sealing coils (1-8) are always in an electrified state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920743849.6U CN210716205U (en) | 2019-05-22 | 2019-05-22 | Magnetic fluid sealing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920743849.6U CN210716205U (en) | 2019-05-22 | 2019-05-22 | Magnetic fluid sealing valve |
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| Publication Number | Publication Date |
|---|---|
| CN210716205U true CN210716205U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920743849.6U Active CN210716205U (en) | 2019-05-22 | 2019-05-22 | Magnetic fluid sealing valve |
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| CN (1) | CN210716205U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017396A (en) * | 2019-05-22 | 2019-07-16 | 杭州沃凌的机电有限公司 | A kind of magnet fluid sealing valve |
| CN112628279A (en) * | 2020-12-24 | 2021-04-09 | 清华大学 | Magnetic liquid sealing device for oscillating shaft |
-
2019
- 2019-05-22 CN CN201920743849.6U patent/CN210716205U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017396A (en) * | 2019-05-22 | 2019-07-16 | 杭州沃凌的机电有限公司 | A kind of magnet fluid sealing valve |
| CN112628279A (en) * | 2020-12-24 | 2021-04-09 | 清华大学 | Magnetic liquid sealing device for oscillating shaft |
| CN112628279B (en) * | 2020-12-24 | 2021-12-14 | 清华大学 | Magnetic liquid sealing device for oscillating shaft |
| US11421786B2 (en) | 2020-12-24 | 2022-08-23 | Tsinghua University | Magnetic fluid sealing device for oscillating shaft |
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