CN2219979Y - Direct-acting electromagnetic air valve - Google Patents

Abstract

The utility model relates to a direct-acting electromagnetic air valve. The utility model is characterized in that gaps are arranged between a movable iron core (18) and a still iron core (21) and a magnetic cover (19). A two-bit three-way electromagnetic valve is formed by the sealing match between a valve core (7) and an upper and a lower valve sleeves (8), the match between a circular and sealing surfaces (22) of an upper and a lower end surfaces in the middle of the valve core and the sealing match between the upper and the lower valve sleeves (8) and a valve body (1). The direct-acting electromagnetic air valve integrates the technologies of a slide valve and a stop valve. The utility model has the advantages of reasonable structure, direction changing sensitivity, no high requirement for the quality of an air source, no limitation for minimum operating pressure, small size, light weight and reliable operation. The direct-acting electromagnetic air valve is suitable for the automatic operation of a braking brake, a unidirectional pneumatic cylinder and a pneumatic actuator; the utility model can also be used for the on-off of oil and cleaning water with small flow capacity.

Description

Direct-acting type electromagnetism air valve

The utility model belongs to the pneumatic valve element.

The two-position three way electromagnetic air valve that existing China pneumatic element is produced, latus rectum is greater than Φ 6mm, it all is leading type, all below 48V, this class valve all is to operate main valve by electromagnetic priority valve control pressurized air to the VDC grade, thereby makes the spool commutation, its electromagnetic power can be done lessly, but higher to the source of the gas quality requirement, general front will add fixed filter could use, and the requirement of minimum movements air pressure (more than the 0.4MPa) is arranged.When filter blocks, when the upper and lower cavity exhaust is connected the instantaneous lowpressure of improper appearance, the fault that does not live will appear not opening or closing.As DK-20 type electromagnetic air valve, its main valve designs according to differential principle, there is pilot valve the front, its deficiency is that pilot valve iron core whereabouts stroke is big, often damage sealing, DK-15/7 type small product size big and heavy (30kg), electromagnetic power big (up to 200W) makes the relay of control be difficult to realize miniaturization.

Provide a kind of rational in infrastructure, reliable, volume is little, and the wide electromagnetic air valve of Applicable scope in light weight is a purpose of this utility model.

The utility model changes leading type into direct-acting type electromagnetism air valve, it is characterized in that the moving iron core (18) of electromagnet and static iron core (21), magnetic conductive cover respectively have a gap between (19); There is O RunddichtringO (6) at the two ends of the spool (7) in the valve body (1), be sealed and matched with last lower valve sleeve (8), there is the annular sealing surface (22) with axis normal the intermediate projections step axle upper and lower end face of spool, last lower valve sleeve (8) structure is identical, at cylindrical two circular grooves are arranged all, all at one end on the face seam is arranged, and have symmetrical holes on the alternate surface of two circular grooves of cylindrical, support ring (9) between the last lower valve sleeve (8) has the vent of symmetry, has guaranteed the break-make of gas circuit; The top of valve body is provided with manual rod (12), and is relative with moving iron core (18), increases the reliability of air valve.

The bottom of manual rod (12) has pin (13) to pass, and the following end mill of bar cover (15) becomes centrosymmetric two helical planes, plays lock function.

Between manual rod (12) and the gland (16) Returnning spring (14) is arranged, base spring (4) places between bottom (7) and the spring seat (3), and spring seat (3) is close to spool (7), and spring plays reset response.

Structure of the present utility model such as accompanying drawing, accompanying drawing are direct-acting type electromagnetism air valve schematic representation, wherein 1, valve body, and 2, bottom flange, 3, spring seat, 4, spring, 5, screw, 6, O type circle, 7, spool, 8, valve pocket, 9, support ring, 10, screw, 11, screw, 12, manual rod, 13, pin, 14, spring, 15, bar cover, 16 glands, 17, magnetic conducting plate, 18, moving iron core, 19, magnetic conductive cover, 20.Outer concentrating flux sleeve, 21, static iron core, 22, annular sealing surface, 23, O type circle.

Specify below in conjunction with embodiment:

It is the double gap structure that the electromagnet of valve moves iron core (18), between moving iron core (18) and static iron core (21), a gap is arranged respectively, and moving iron core riveting together magnetic conducting plate (17) and the magnetic conductive cover (19) on the outer concentrating flux sleeve (20) between a gap is arranged, its electromagnetic force is twice above than the electromagnetic force of unidimensional single gap structure, therefore, the foot of electromagnet is very little little, and power is low.

Returnning spring (4) places valve bottom, with bottom flange (2) as the spring supporting base.

Relatively-stationary valve rod is arranged to bear the electromagnetic force of transmitting from the moving iron core of electromagnet in the middle of the spool (7), valve rod is with spring clip axial restraint.There is the O RunddichtringO at spool (7) two ends, cooperate with last lower valve sleeve (8), and there is the annular sealing surface perpendicular with axis (22) intermediate projections step axle upper and lower end face, and matching with the seam of last lower valve sleeve (8) respectively closes the sealing on-off action.Last lower valve sleeve (8) structure is identical, all at one end on the face seam is arranged, and has symmetrical holes on the alternate surface of two circular grooves of cylindrical, so that the valve pocket the inside communicates with inlet, outlet.Support ring (9) also has symmetrical vent.

Cooperate with last lower valve sleeve seal ring by spool (7), valve pocket (8) cooperates with valve body (1) seal ring, has just formed three chambeies in the valve body: P chamber, A chamber, O chamber.

Man-operated mechanism is by manual rod (12), pin (13), and Returnning spring (14), bar cover (15) and gland (16) are formed.The bar cover is tubular structure, and at one end facing cut becomes two inclined-planes of symmetry, center, and bar cover (15) is fixed with gland (16) interference fit.One end of manual rod (12) is installed with pin (13), and manual rod when rotation, pin two is overlapped symmetrical helicoid along bar and moved, and rotatablely moving of manual rod transformed or straight line motion, promotes stem movement by moving iron core.Because the helicoid angle is less, pin can self-locking.During the manual rod counterrotating, spring (14) resets, and keeps manual rod to be in the extreme higher position.

Electromagnet excitation or under the manual rod effect, valve rod are subjected to downward force and drive spool (7) and move down, and sealing surface disconnects on the spool, and the P chamber communicates with the A chamber, and lower sealing surface and lower valve sleeve seam fitted seal, P chamber and the disconnection of O chamber; When electromagnet stopped excitation, spool (7) moved up under action of reset spring, and spool (7) is gone up sealing surface and matched with the upper valve sleeve seam, and pressure chamber P and active chamber A disconnect, and the A chamber communicates with the O chamber.Here because the moving up and down of spool (7), the commutation of air-flow is leaned on be spool (7) up and down two sealing surfaces and last lower valve sleeve (8) cooperate with the break-make of seam and realize.

Effect of the present utility model because the structure of Direct Action Type does not have pilot valve core, commutation by Electromagnet directly drives, and is rational in infrastructure, thereby sensitive reversing, not high to the source of the gas quality requirement , do not have the restriction of minimum operating pressure yet; Reversal valve has partly fully utilized guiding valve and cut-off The technology of valve, spool is stress balance in pressure medium, and required control is little, and is therefore identical The valve of latus rectum is more much smaller than the direct-acting valve size of common structure, and power is also low by (20～25 W); The moving iron core of electromagnet is double gap helix tube type structure, than single gap structure electromagnet Electromagnetic force will be twice above, and therefore, the electromagnet size is littler, and power is low; Line when valve When irising out problem, direct rotary manual bar makes spool commutation and locking, and that improves valve can Lean on property.

The utility model is applicable to damper brake, one-way cylinder and other pneumatic actuators from Moving operation can also be used for rill gauging and the break-make of sliding clean water.

Claims (4)

1. the electromagnetic air valve with the alternative leading type of direct-acting type mainly is made up of valve body, electromagnet, man-operated mechanism, and it is characterized in that: the moving iron core (18) of electromagnet and static iron core (21), magnetic conductive cover respectively have a gap between (19); The two ends of the spool (7) in the valve body (1) have O RunddichtringO (6) and last lower valve sleeve (8) to be sealed and matched, there is the annular sealing surface perpendicular with axis (22) the intermediate projections step axle upper and lower end face of spool, the structure of last lower valve sleeve (8) is identical, at cylindrical two circular grooves are arranged all, all at one end on the face seam is arranged, and having symmetrical holes on the alternate surface of two circular grooves of cylindrical, the support ring (9) between the last lower valve sleeve (8) has the vent of symmetry; It is relative with moving iron core (18) that the top of valve is provided with manual rod (12).

2. according to the described electromagnetic air valve of claim 1, it is characterized in that pin (13) is arranged at the bottom of manual rod (12), the following end mill of loop bar (15) becomes centrosymmetric two helical planes.

3. according to claim 1 or 2 described electromagnetic air valves, it is characterized in that between manual rod (12) and the gland (16) Returnning spring (14) being arranged.

4. according to the described electromagnetic air valve of claim 1, it is characterized in that base spring (4) places between bottom flange (2) and the spring seat (3), spring seat (3) is close to spool (7).

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