CN201747688U

CN201747688U - Electromagnetic changing valve

Info

Publication number: CN201747688U
Application number: CN201020502827XU
Authority: CN
Inventors: 胡兆华; 彭超; 刘刚; 吕恩禄
Original assignee: Henan Aerospace Pressure Element Co Ltd
Current assignee: Henan Aerospace Hydraulic and Pneumatic Technology Co Ltd
Priority date: 2010-08-24
Filing date: 2010-08-24
Publication date: 2011-02-16
Anticipated expiration: 2020-08-24

Abstract

The utility model relates to an electromagnetic changing valve, which comprises a valve body, wherein, a valve core is slidingly assembled in the valve body, a left sealing face and a right sealing face which are arranged relatively and respectively face to two ends of the valve core are arranged on the valve core, a left step face and a right step face which are correspondingly mated with two sealing faces are provided on the valve body, a pressure spring for driving the valve core is arranged at the right end of the valve core, the left end of the valve core is fixedly connected with one end of a strip-shaped armature arranged on the valve body, the strip-shaped armature is vertically hanged on the valve body by the mode of swinging through the other one end thereof, an electromagnet which is mated with the strip-shaped armature for using is arranged on the valve body, an inlet is arranged on the part of the valve body mated to the valve core segments between the left sealing face and the right sealing face, two sides of the inlet arranged on the valve body outside the left step face and the right step face are respectively provided with a left outlet and a right outlet. According to the utility model, the motion amount of the valve core is the swinging amount of the strip-shaped armature, when the motion amount is small, the valve direction is changed, the pressure of the valve opening is stable.

Description

A kind of solenoid directional control valve

Technical field

The utility model relates to a kind of selector valve that is used for hydraulic pressure or pressure system, relates in particular to a kind of solenoid directional control valve.

Background technique

At present, known selector valve generally comprises valve seat and is slidedly assemblied in the interior spool of valve seat, spool is with respect to the conducting between the different valve port of valve body motion realization when transposition, and the sealing surface between spool and the valve body adopts step surface and the step surface fitted seal on the valve body on the spool usually or adopts the outer circumferential face of spool and the inner peripheral surface fitted seal of valve body.Application number is that 200810010907.0 Chinese patent specification discloses a kind of direct-acting type two-position three-way solenoid valve, comprise valve body and spool, the valve disc that spool comprises valve rod assembly and is fixedly installed on the valve rod assembly bottom, valve body is provided with three ports, one of them port is arranged on the valve body section with valve disc side face cooperation place, two ports are separately positioned on the valve body of above-mentioned port both sides in addition, valve rod assembly is provided with the stage clip of actuate valve stem away from an end of valve disc, generally, be pressed at valve disc under the effect of spring force on the step surface of valve body and the valve disc section of cooperation and realize sealing, work of solenoid valve, when overcoming spring force, electromagnetic force drives the valve disc motion, valve disc is pressed on when realizing sealing on another step surface of valve body and the valve disc section of cooperation, the work of solenoid valve another one, in the process of solenoid valve transposition, spool moves with respect to valve body, because both move distances are bigger, two end faces of valve disc all do not contact with the step surface of valve body, at this moment three of valve equal conductings of valve port, this just makes the pressure at high pressure valve port place reduce and the pressure rising at low pressure valve port place, cause the fluctuation of valve port pressure, the valve port pressure transient influences the performance of hydraulic pressure or pressure system.

Summary of the invention

The purpose of this utility model is to provide a kind of solenoid directional control valve, has when solenoid valve replace to solve in the prior art, because each valve port is understood the problem of the valve port pressure transient that while conducting causes.

For achieving the above object, the utility model adopts following technological scheme: a kind of solenoid directional control valve, comprise valve body, slidable fit has spool in the valve body, one end of solenoid directional control valve is a left end, the other end is a right-hand member, spool is provided with respectively left sealing surface that is oppositely arranged and the right sealing surface towards the spool two ends, has a left side on the described valve body with described two sealing surface corresponding matching, right step surface, the right-hand member of described spool is provided with the stage clip that drives spool, one end of the strip armature that is provided with on the left end of spool and the valve body is connected, strip armature is hung on the valve body by the vertical swing of its other end, valve body is provided with the electromagnet that is used with strip armature, the part that spool section between described valve body and two sealing surfaces spool cooperates is provided with import, and the both sides of import are in a left side, be respectively arranged with left side outlet and right outlet on the valve body outside right two step surfaces.

Described two sealing surfaces are that enlarging is respectively towards the conical surface at spool two ends.

Described electromagnet is positioned at the right side of strip armature.

One end of spool that this practicality is new and strip armature is fixed, strip armature is hung on the valve body by the vertical swing of its other end, the amount of exercise of spool is the oscillating quantity of strip armature just, the valve core movement amount is less, in the transposition process of valve, influencing each other of left and right outlet is little, can not influence the stability of valve port pressure.

Two sealing surfaces are the conical surface about of the present utility model, owing to be sealed into linear sealing between the step surface of the conical surface and valve body, good sealing effect, leak-down rate is low.

Electromagnet of the present utility model is positioned at the right side of strip armature, and when work of electromagnet, left spool can be pressed on the valve body, inlet pressure can overcome the elastic force of the stage clip of spool right-hand member, valve right position work, like this, with regard to the left side that not be used in solenoid valve spring has been set, has simplified the structure of valve.

Description of drawings

Fig. 1 is an overall structure schematic representation of the present utility model;

Fig. 2 is the partial enlarged drawing of Fig. 1 at the A place.

Embodiment

A kind of embodiment of solenoid directional control valve, in Fig. 1, one end of solenoid directional control valve is a left end, the other end is a right-hand member, this solenoid directional control valve comprises valve body 8, slidable fit has spool 9 in the working hole of valve body 8, has a thin neck section 18 on the spool 9, the left side step surface of thin neck section 18 and right side step surface are left sealing surface 6 and the right sealing surface 4 that the step surface on valve body 8 cooperates, left side sealing surface 6 is the conical surface of enlarging towards a left side, right sealing surface 4 is the conical surface of enlarging towards the right side, left side sealing surface 6 and right sealing surface 4 are for being oppositely arranged, and valve body 8 is provided with the left step surface 7 that cooperates with left sealing surface 6, also is provided with the right step surface 1 that cooperates with right sealing surface 4 on the valve body 8, the part that cooperates with the thin neck section 18 of spool 9 on the valve body 8 is provided with import 5, and the both sides of import 5 are respectively arranged with left side outlet 17 and right outlet 3 on the valve body outside two step surfaces.For spool 9 is installed in the valve body 8, spool 9 is split type, comprise by the left spool part and the right spool part of separating between the sealing surface of the left and right sides, two spools part is in the place's combination of left sealing surface, the left sealing surface of left side spool part is provided with blind hole, and the left end head of the thin neck section of right spool part left end inserts in the left spool blind hole partly and partly is combined as a whole with left spool.The left side section of spool 9 is stretched out valve body 8 and is connected with an end of strip armature 12, and the right-hand member of spool 9 cooperates with an end roof pressure of stage clip 2, and the other end of stage clip 2 cooperates with the plug roof pressure of screw thread spinning at valve body 8.The other end of strip armature 12 is provided with the fixed hole 14 that extends along spool 9 axis, and fixed hole 14 is a shoulder hole, and its reducing section is near valve body 8, and valve body 8 is provided with electromagnet with 12 adjacent the locating of strip armature, and electromagnet is positioned at the right side of strip armature.Iron core 16 in the middle of electromagnet comprises, the periphery of iron core 16 is arranged with coil 15.Iron core 16 is fixing by one end and valve body 8, the other end of iron core 16 is provided with yoke assembly 19, yoke assembly 19 is being fixed on the valve body 8 on the iron core 16 and by iron core 16 by screw, one end of yoke assembly 19 is provided with the matching hole that cooperates with fixed hole 14 on the strip armature 12, be provided with in fixed hole and the matching hole strip armature 12 is arranged on locating stud 13 on the yoke assembly 19, the inner segment of locating stud 13 is plugged in the matching hole of yoke assembly, the reducing section snug fit of outer section and fixed hole and with the flared section Spielpassung of fixed hole, because fixing pin 13 is very little with the drive fit section of fixed hole, so strip armature can be swung with respect to the yoke assembly, thereby finish the move left and right of spool 9.The left side cover of strip armature 12 is equipped with protecting cover 11, and protecting cover 11 is arranged on valve body 8 and the yoke assembly 19, and protecting cover 11 is provided with socket 10, and the inlet wire head and the terminal of the wiring point of socket 10 and coil 15 are electrically connected.

The right sealing surface and the left sealing surface of present embodiment are the conical surface, also can be the plane.

The strip armature of present embodiment is arranged on the valve body by locating stud, also can hook be set on the valve body, and the upper end of strip armature is hung on the hook.

Claims

1. solenoid directional control valve, comprise valve body, slidable fit has spool in the valve body, one end of solenoid directional control valve is a left end, the other end is a right-hand member, spool is provided with respectively left sealing surface that is oppositely arranged and the right sealing surface towards the spool two ends, has a left side on the described valve body with described two sealing surface corresponding matching, right step surface, it is characterized in that: the right-hand member of described spool is provided with the stage clip that drives spool, one end of the strip armature that is provided with on the left end of spool and the valve body is connected, strip armature is hung on the valve body by the vertical swing of its other end, valve body is provided with the electromagnet that is used with strip armature, the part that spool section between described valve body and two sealing surfaces spool cooperates is provided with import, and the both sides of import are in a left side, be respectively arranged with left side outlet and right outlet on the valve body outside right two step surfaces.

2. solenoid directional control valve according to claim 1 is characterized in that: described two sealing surfaces are that enlarging is respectively towards the conical surface at spool two ends.

3. solenoid directional control valve according to claim 1 and 2 is characterized in that: described electromagnet is positioned at the right side of strip armature.