CN2210273Y

CN2210273Y - Wet type electromagnetic ball valve

Info

Publication number: CN2210273Y
Application number: CN 94230285
Authority: CN
Inventors: 孙成文
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-09-23
Filing date: 1994-09-23
Publication date: 1995-10-18
Anticipated expiration: 2004-09-23

Abstract

The utility model discloses a wet type electromagnetic ball valve which adopts a hydraulic control element which has a single ball and a double-ball structures. The opening or closing of an oil passage is formed by the leaving and covering of a steel ball and a valve seat; the flowing direction of a medium is changed; the steel ball is driven by the wet type valve by using the electromagnetic force of an electromagnet, and the storing capability of a reset spring; a straight rod is used for transmitting; high-pressure oil is lead into the sealed concentrating flux sleeve of the electromagnet; an armature moves in high-pressure oil. Because the arrangement of the oil passage makes direct and indirect hydraulic force exerted on the transmission rod and the steel ball keep balance. The transmission rod is provided with a sealing member to avoid the high-pressure oil leaking to a low pressure chamber. Compared with a slide valve, the valve has the advantages of no leakage phenomenon, no hydraulic clamping phenomenon and quick response. Compared with an existing ball valve, the valve has the advantage of long service life.

Description

Wet type electromagnetic ball valve

The utility model is a kind of hydraulic control component, two-position three way wet type Solenoid ball valve by name, and its function is the flow direction that changes driving medium under the high pressure operating mode, it is applicable in the leak free pressure dwelling loop of high pressure, can be used as the pilot valve of cartridge valve.

In existing solenoid directional control valve product, a kind of is the guiding valve that wet electro-magnet drives, a kind of is the ball valve that air-gap solenoid drives, the former shortcoming is that internal leakage is arranged inevitably, the hydraulic lock phenomenon is arranged, the latter's shortcoming is that a medium tache---lever is arranged, complex structure, and also to can not show a candle to wet electro-magnet long the life-span of air-gap solenoid.

The purpose of this utility model is the deficiency at above-mentioned two kinds of valves, adopts long wet electro-magnet of life-span directly to promote steel ball and removes to open and close valve seat, reaches the oil circuit commutation, since steel ball with the seat hole contact after more the pressure tight more, sealing is good more, so there is not leakage, also the hydraulic lock phenomenon can not occur.

The purpose of this utility model is achieved in that the wet type Solenoid ball valve, include electromagnet, oil through, valve body (2) and spool, its special way is that the drive link (8) in the valve body is provided with seal ring (20), the both sides of seal ring (20) are provided with back-up ring (19) and (21), in valve body (2), also be provided with passage (22), the one end is communicated with the inner chamber (23) of the concentrating flux sleeve (1) of electromagnet, and the other end is communicated with the inlet P of pressure oil.

Compare with guiding valve, the utility model does not have leakage and hydraulic lock phenomenon, and response is fast, compare with the existing ball valve that uses, the utility model cuts lever construction, has prolonged working life, electromagnet moves in oil, and lubricity is good, and the utility model installation dimension and existing guiding valve are interchangeable in addition.

Be described in detail technical solution of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is the structural representation of single ball rotating vane type Solenoid ball valve.

Fig. 2 is the structural representation of double-ball wet type Solenoid ball valve.

As Fig. 1, single ball formula structure, be threaded fastening with the concentrating flux sleeve 1 of wet electro-magnet with valve body 2 usefulness at valve, its seam crossing has seal ring 3 to prevent that high pressure oil from leaking outside, two ball seats 4 and 5 about coaxial branch are housed in the valve body 2, accompany the arc pawl 6 of two radial symmetric therebetween, arc pawl 6 is projections of ball seat 5,6 of two arc pawls contain axially activity and the ball seat 4 adjacent with the left and right sides, the steel ball 7 that 5 take turns contacts, the diameter of steel ball 7 is greater than ball seat 4,5 aperture, the power that drives steel ball 7 covering ball seats 5 is from electromagnet armature 18, the left end of steel ball 7 has the drive link that passes from ball seat 4 holes 8 that offsets with it to transmit, there is the bar that passes 9 that offsets with it on the right side of steel ball 7 from the hole of ball seat 5, the power that drives steel ball 7 covering ball seats 4 is to have the bar 9 that passes from ball seat 5 to transmit therebetween from spring 10, drive link 8 left ends are against on the armature 18 in the concentrating flux sleeve 1, bar 9 right-hand members are against on the spring 10, spring 10 rests on the lid of fixing with valve body 2 11, oil duct in the valve body 2 is arranged: the space 16 logical working hole A of steel ball 7 activities, the space 13 logical oil return inlet T in ball seat 4 left sides, 11 radial hole 25 logical pressure hydraulic fluid port P are passed through to cover in the space on ball seat 5 right sides, drive link 8 right-hand member diameters form gap 14 in order to logical oil less than the aperture of ball seat 4, bar 9 diameters form gap 15 in order to logical oil less than ball seat 5 apertures, the left side in space 13 has and drive link 8 back-up ring 19 movingly, there is the seal ring 20 that is held on the drive link 8 in back-up ring 19 left sides, seal ring 20 left sides have back-up ring 21 keeping off seal ring 20, circular groove 26 is arranged in order to logical oil between back-up ring 21 left sides and the concentrating flux sleeve 1, in valve body 2, open a passage 22, passage 22 left ends lead to circular groove 26, and to enter the inner chamber that leads to concentrating flux sleeve 1 through the gap 24 of drive link 8 and concentrating flux sleeve 1 be the inner chamber 23 of armature motion to the radial hole on back-up ring 21 again.Described ball valve, when normality, steel ball 7 is crushed on the ball seat 4, and this moment, the T mouth was closed, the high pressure oil of P mouth through the space 12, gap 15, space 16 logical A mouths, when coil 17 the electric concentrating flux sleeve that makes is excitatory, magnetic force moves right armature 18, transmits through drive link 8 to make steel ball 7 leave ball seat 4 and covering ball seat 5, and this moment, T was closed, the A mouth through the space 16, gap 14, space 13 logical T mouths, the P mouth is closed simultaneously.

In two spherical structures, be that two balls 27 are arranged in the valve body 2,28 are located at seat 30 left sides and seat 31 right sides respectively, one supporting sleeve 32 is arranged between two, have one to transmit bar 29 in the supporting sleeve, supporting sleeve 32 is supporting transmission bar 29, transmission bar 29 left ends stretch out left from the hole of seat 30 and are against ball 27 right sides, a drive link 8 is supported in ball 27 left sides, drive link 8 left sides are butted on armature 18, transmit bar 29 right-hand members and be against ball 28 left sides to the right from the hole of seat 31, ball 28 right sides are butted on bar 9, and bar 9 right sides are butted on spring 10, supporting sleeve 32 bi-side have recessed

annular groove

33 and 34 and cut a toxoplasm and the space 35 that forms in order to logical oil, logical A mouth, seat 30 left surfaces are containing ball 27 in the middle of stretching out two arc pawls 36, the logical T mouth in seat 30 left sides, seat 31 stretches out two arc pawls to the right and is containing ball 28, the logical P mouth in seat 31 right sides.This valve under normal conditions, spring 10 each left push rod 9 make ball 28 hide seat 31, push ball 27 to left through transmission bar 29 simultaneously and leave seat 30, this moment, the P mouth was closed, and the A mouth leads to the T mouth, when coil gets when electric, armature 18 pushes away two balls synchronously to the right, is hiding seat 30, has opened seat 31, the logical A mouth of P mouth this moment, the T mouth is closed.

In above-mentioned two kinds of structures, the suffered hydraulic coupling of steel ball equals the product of a hole area and pressure, sometimes be higher than 100 newton, the present invention has adopted the hydro-cushion measure, seal approach is provided with passage 22 the P mouth high pressure oil of valve body 2 is introduced in the inner chamber 23 of electromagnet, and armature is moved in airtight high-voltage oil cavity, and the bar that promotes steel ball directly equals the aperture of ball seat, and promptly the suffered hydraulic coupling of steel ball is a balance.Like this, as long as just electromagnet overcomes spring force can work, in addition, the seal ring 20 of setting has prevented that high pressure oil from entering low too chamber.。

The motion of steel ball has two positions, and ball and ball seat open and close the through and off of three mouths.

Claims

1, a kind of wet type Solenoid ball valve, include electromagnet, oil through, valve body (2) and spool, it is characterized in that the drive link (8) in the valve body is provided with seal ring (20), the both sides of seal ring (20) are provided with back-up ring (19) and (21), in valve body (2), also be provided with passage (22), the one end is communicated with the inner chamber (23) of the concentrating flux sleeve (1) of electromagnet, and the other end is communicated with the inlet P of pressure oil.

2, wet type Solenoid ball valve according to claim 1 is characterized in that it can be single ball or double-ball.