CN208237189U - Latching valve and its electromagnet - Google Patents

Abstract

The utility model relates to valve technology fields, and in particular to a kind of latching valve and its electromagnet.Latching valve includes having import, the valve body of outlet, main channel is equipped in valve body, main valve seat is equipped in main channel, main channel includes the inlet side and outlet side positioned at main valve seat two sides, valve body is equipped with the main valve plug cooperated with main valve seat in the inlet side, the reset spring for applying active force to main valve plug to force main valve plug to be closed is equipped in valve body, back pressure cavity is additionally provided in valve body, back pressure cavity is connected to by control channel with the outlet side, control valve seat and corresponding control valve core are equipped in control channel, valve body is equipped with the electromagnet for the movement of drive control spool, the electromagnet includes armature and is correspondingly arranged at armature both ends to limit the buting iron of its stroke, the electromagnetic coil being provided with for driving armature reciprocating action is surrounded in the outside of armature, heat insulating mattress is provided between the one end and corresponding buting iron of electromagnetic coil towards valve body.

Description

Latching valve and its electromagnet

Technical field

The utility model relates to valve technology fields, and in particular to a kind of latching valve and its electromagnet.

Background technique

The effects of valve can realize pressure regulation, commutation, on-off according to its different structure.Related fluid path or gas are controlled in valve When road is turned on or off, spool movement, when spool, which contact with corresponding valve port sealing, to be cooperated, valve closing, corresponding fluid path or Gas circuit disconnects, and when spool and corresponding valve port are detached from, valve is opened, corresponding fluid path or gas circuit conducting.

A kind of multi-function electromagnetic valve, this multifunction electromagnetic are disclosed in the patent of invention of Patent No. CN85201792 Valve is actually that the solenoid valve for playing control action is configured on on-off main valve, and main valve includes the valve with inlet and outlet Body, valve body are equipped with the main channel of connection inlet and outlet, are equipped with main valve seat in main channel.Main valve seat is actually by main channel point For and the corresponding inlet side of import and outlet side corresponding with outlet, movement is equipped with main valve corresponding with main valve seat in valve body Core, main valve plug contact sealing with main valve seat to separate main channel, and main valve plug is detached from main valve seat so that main channel is connected, in valve body It is additionally provided with and applies the reset spring for forcing main valve plug to the mobile active force in the direction contacted with main valve seat to main valve plug, in valve body In be equipped with back pressure cavity, back pressure cavity is connected to by damp channel with inlet side, and back pressure cavity passes through control channel and is connected to outlet side, and And control valve seat is equipped in control channel, valve body is equipped with electromagnet, solenoid actuated control valve corresponding with control valve seat Core is acted to contact, be detached from control valve seat.

In use, control channel is separated, and back pressure cavity passes through resistance when the control valve core of solenoid valve and control valve seat contact Buddhist nun channel is connected to inlet side, and the gas pressure in back pressure cavity is identical as inlet side gas pressure, and the pressure difference that main valve plug is subject to is made The active force of reset spring will not firmly be overcome and open main valve plug, main channel is separated, and entire solenoid valve is closed.Work as solenoid valve Control valve core and control valve seat when being detached from, control channel conducting, the gas transient flow inlet/outlet side in back pressure cavity, back pressure cavity pressure Power reduces, and pressure action power suffered by main valve plug opens main valve plug, main valve plug and master in the case where overcoming acting force of the spring Valve seat is detached from, main channel conducting, inlet and outlet connection, entire solenoid valve conduction.It is this with reset spring and back pressure self-locking structure The security performance of valve is preferable, it is not easy to and it is unexpected by outlet pressure pulsations to open, moreover, passing through the entire valve of magnet control Switch it is also more convenient, application is wider.But since electromagnet is directly installed on valve body, when by this solenoid valve application When high-temperature medium place, the heat for flowing through the high temperature fluid generation of main channel can generate negative shadow to electromagnet by valve body It rings, reduces electromagnet inner components performance, shorten electromagnet service life, influence electromagnet action reliability.

In order to solve influence of the temperature to electromagnet inner components, technical staff can using electromagnet and valve body it Between setting isolation or reduce heat transfer component method.Authorization Notice No. is CN206299630U, and authorized announcement date is 2017.07.04 utility model patent discloses a kind of heat dissipation type solenoid directional control valve, including valve body, spool, valve body end cap and electricity The both ends of magnet assemblies, valve body are connect with electromagnet assembly and valve body end cap respectively；Electromagnet assembly includes two iron cores, rank Iron, electromagnetic coil, magnetic yoke and magnetic shield, offer the through-hole passed through for push-pull rod in the first iron core, and electromagnet assembly also wraps Cooling stand is included, electromagnetic coil is arranged in cooling stand, and the magnetic yoke is provided on the mounting hole of cooling stand.Iron core The first iron core including the buting iron as lower end, offers step on the buting iron, accordingly offers on valve body and step The mounting hole of cooperation, and electromagnetic coil and valve body are located at the two sides of the buting iron of lower end.Valve body is in working condition in order to prevent Lower being transmitted to heat on electromagnet assembly, is arranged with heat insulating washer on the outer peripheral surface of the buting iron of lower end, and heat insulating washer will Cooling stand is separated with valve body, thus prevent the heat on valve body from being transmitted in cooling stand and electromagnetic coil therein, The thermal diffusivity that ensure that electromagnet assembly improves the reliability that electromagnet assembly uses.

But wherein the problem is that, only it is provided between electromagnet and valve body for heat-insulated heat insulating washer, it is heat-insulated Effect it is not obvious enough, be not suitable for the high work condition environment of temperature requirement.

Utility model content

The purpose of this utility model is to provide a kind of electromagnet, and heat insulation is good, can satisfy a variety of different temperatures It is required that operating condition, the utility model simultaneously be designed to provide a kind of latching valve using the electromagnet.

To achieve the above object, the latching valve in the utility model adopts the following technical scheme that

Latching valve is equipped with main channel including the valve body with import, outlet in valve body, main valve seat is equipped in main channel, main Channel includes the inlet side and outlet side positioned at main valve seat two sides, and valve body is equipped with the main valve cooperated with main valve seat in the inlet side Core is equipped with the reset spring for applying active force to main valve plug to force main valve plug to be closed in valve body, is additionally provided with back pressure cavity in valve body, Back pressure cavity is connected to by control channel with the outlet side, and control valve seat and corresponding control valve core, valve are equipped in control channel Body be equipped with for drive control spool movement electromagnet, the electromagnet include armature and be correspondingly arranged at armature both ends with The buting iron for limiting its stroke surrounds the electromagnetic coil being provided with for driving armature reciprocating action in the outside of armature, in electromagnetism Coil is provided with heat insulating mattress towards between one end and corresponding buting iron of valve body.

The beneficial effect is that: it is provided with heat insulating mattress between electromagnetic coil and buting iron, the external world can will be passed to coil The heat isolation passed, be affected by temperature the electromagnetic coil in electromagnet will not, ensure that the electromagnetic coil of electromagnet Performance；It is provided with heat insulating mattress in electromagnet, can guarantee electromagnetic coil directly by heat-insulated protection, even if electromagnet is outer Hot transmitting has occurred between side and high temperature source, but heat insulating mattress can protect electromagnetic coil to be unaffected, to ensure that The heat insulation of electromagnet improves the occasion quantity that electromagnet and latching valve can be applied to, and increases being applicable in for latching valve Property.

Further, heat insulating mattress is equipped between the valve body and electromagnet.

The beneficial effect is that: heat insulating mattress is provided between electromagnet and valve body, in this way, flowing in the main channel of valve body When crossing high-temperature medium, it is effectively reduced influence of the heat to electromagnet using heat insulating mattress, extends the service life of electromagnet.

Further, it is installed on the armature and is sequentially connected with the control valve core so that control valve core follows armature The valve rod of reciprocating movement, armature, which is equipped with, moves back and forth the mounting hole that direction extends along armature, and the valve rod is connected through a screw thread Fastening assembly is in the mounting hole.

The beneficial effect is that: mounting hole is provided in armature, and the form that valve rod is connected through a screw thread is fixed It is assemblied in mounting hole, realizes the structure-integrated of armature and valve rod, valve rod movement, armature are able to drive when armature movement The no hysteresis quality of movement between valve rod, armature band ovable valve stem move at the same time, and ensure that valve rod to the standard of spool control action True property.

Further, the electromagnet is equipped with the aobvious switch in the position for detecting control valve core position, and the aobvious switch in position has For being triggered by moving armature in place with the microswitch of display control spool position.

The beneficial effect is that: the position that configuration can be used for display control spool position on latching valve, which is shown, to be switched, and such one Next, the aobvious switch in position is used cooperatively with solenoid valve, can effectively be controlled, be realized certainly by the system that electric signal realize entire latching valve The intelligentized control method of locking-valve.

Further, the lock-screw with valve rod fixing assembling is additionally provided in the mounting hole, in locking in mounting hole The side away from the valve rod of screw is connected through a screw thread the mandril for fastening and being equipped with for triggering the microswitch.

The beneficial effect is that: it is provided with the lock-screw and mandril with valve rod cooperation in mounting hole, uses fission The form of installation avoids technical staff to process the valve rod of longer dimension, and can guarantee processing and the dress of various components The precision matched.

Further, the tabletting for being used to trigger the microswitch being installed on mandril is equipped in the aobvious switch of institute's rheme.

The beneficial effect is that: the tabletting for triggering microswitch is installed on mandril, valve rod band in movement is enable Dynamic mandril movement is to trigger microswitch, since valve rod and mandril are kept strokes, to ensure that the accuracy of control.

Further, the mandril is equipped with ladder rod segment, and ladder rod segment has the cascaded surface away from the valve rod, described Spiral, which is equipped with, on mandril is pressed the fastening nut being fixed in the ladder rod segment for the tabletting, in tabletting and fastening nut Between be equipped with tabletting adjusting pad.

The beneficial effect is that: it is provided with tabletting adjusting pad between tabletting and nut, is being used convenient for technical staff The positional relationship of tabletting and nut is adjusted in the process.

Further, the lock-screw has the optical axis section extended from one end close to valve rod to mandril one end, optical axis It is formed between section and the inner wall of mounting hole and is used for annular gap for dispensing glue.

The beneficial effect is that: it is provided with optical axis section on lock-screw, is formed between optical axis section and the inner wall of mounting hole Annular gap carries out dispensing in this gap, can guarantee that the mandril of lock-screw and two sides connection and valve rod will not shake Rotating ring loosens under border, and because being not provided with other structures in optical axis section, can guarantee the filling of glue.

To achieve the above object, the electromagnet in the utility model adopts the following technical scheme that

Electromagnet including armature and is correspondingly arranged at armature both ends to limit the buting iron of its stroke, in the outer side wall of armature Be provided around the electromagnetic coil for driving armature reciprocating action, electromagnetic coil towards valve body one end and corresponding buting iron it Between be provided with heat insulating mattress.

The beneficial effect is that: it is provided with heat insulating mattress between electromagnetic coil and buting iron, the external world can will be passed to coil The heat isolation passed, be affected by temperature the electromagnetic coil in electromagnet will not, ensure that the electromagnetic coil of electromagnet Performance；It is provided with heat insulating mattress in electromagnet, can guarantee electromagnetic coil directly by heat-insulated protection, even if electromagnet is outer Hot transmitting has occurred between side and high temperature source, but heat insulating mattress can protect electromagnetic coil to be unaffected, using heat-insulated Pad effectively reduces influence of the heat to electromagnet, extends the service life of electromagnet, and heat insulating mattress ensure that electromagnet Heat insulation improves the occasion quantity that electromagnet and latching valve can be applied to, increases the applicability of latching valve.

Further, the electromagnet is equipped with the aobvious switch in the position for detecting armature position, and the aobvious switch in position, which has, to be used for It is triggered by moving armature in place with the microswitch of display control spool position.

The beneficial effect is that: configuration can be used for showing the aobvious switch in the position of armature position, so, position on latching valve Aobvious switch is used cooperatively with solenoid valve, can effectively be controlled, be realized intelligent by the system that electric signal realizes entire latching valve Control.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of embodiment of latching valve in the utility model；

Fig. 2 is the top view (removal upper cover plate) of latching valve shown in Fig. 1；

Fig. 3 is the connection schematic diagram of import side chamber, throttle orifice and back pressure cavity in latching valve shown in Fig. 1.

In figure: 1, valve body；2, the first O-ring；3, main valve plug；4, valve deck；5, reset spring；6, the second O-ring；7, it controls Spool；8, electromagnet；9, gasket；10, the aobvious switch adjusting pad in position；11, the aobvious switch in position；12, tabletting adjusting pad；13, tabletting； 14, mandril；151, upper buting iron；152, lower buting iron；16, armature；17, lock-screw；18, valve rod；19, pressing plate；201, coil every Heat pad；202, electromagnet heat insulating mattress；21, third O-ring；22, the 4th O-ring；23, guide assembly；24, pin；25, pulvinulus Enclose A；26, hexagonal cylindrical head screw A；27, end cap fastening screw；28, small washer B；29, hexagonal cylindrical head screw B；30, pulvinulus Enclose C；31, hexagonal cylindrical head screw C；32, small washer D；33, hexagonal cylindrical head screw D；34, small washer E；35, hexagonal cylindrical head Screw E；36, microswitch；37, upper cover plate；38, side cover plate；39, back shroud；40, limiting slot；41, position shows shell.

Specific embodiment

The embodiments of the present invention is described further with reference to the accompanying drawing.

The specific embodiment of latching valve provided by the utility model, it is as shown in Figure 1 to Figure 3, self-locking in the embodiment Valve includes main valve and electromagnet 8, and electromagnet 8 is fixedly mounted on the valve of main valve by small washer B28 and hexagonal cylindrical head screw B29 On body, electromagnet 8 includes electromagnet housing and is arranged in the intracorporal armature 16 of shell, and the movement to armature 16 is provided in shell Stroke carries out the buting iron of block, the outside of armature 16 is provided with the electromagnetic coil of driving armature reciprocating action, in armature 16 Upper and lower two sides are respectively arranged with buting iron 151 and lower buting iron 152, in electromagnetic coil towards one end of valve body 1, i.e., with lower buting iron 152 corresponding end faces are provided with the heat insulation structural between lower buting iron 152 and electromagnetic coil.It is preferably heat-insulated in the present embodiment Pad, is provided with coil heat insulating mattress 201 between the side and lower buting iron 152 towards valve body 1 of electromagnetic coil, and material is polyamides Imines the heat transfer for passing to electromagnetic coil by lower buting iron 152 can be isolated, with guarantee coil in electromagnet and its His components not will receive the influence of high temperature to reduce mechanically or electrically performance.

In addition, being provided with electromagnet heat insulating mattress 202, between valve body and electromagnet 8 to reduce the high temperature flowed through in main valve Influence of the heat brought by medium to electromagnet.By respectively arranged heat insulating mattress, it can guarantee that electromagnet not will receive valve Body transmits the influence of the heat come at work.

Main valve includes valve body 1, and valve body 1 is equipped with inlet and outlet, and the master that valve body 1 is equipped with connection inlet and outlet is logical Road is equipped with primary valve in main channel, and also movement is equipped with main valve plug 3 in valve body 1, and the 2nd O is equipped between main valve plug 3 and valve body 1 For shape circle 6 to realize the dynamic sealing between main valve plug 3 and valve body 1, main valve plug 3 includes insert body and the court for being set to insert body To the polyimide seal face at primary valve side, herein it should be noted that the polyimide seal face of main valve plug is processing Before, vacuum stabilization processes are carried out at 180 DEG C of high temperature, are reduced the deformation of the material under the high temperature conditions, are ground again after smart car Surface hardness is improved, and then influence of the temperature to main valve plug sealing surface is effectively reduced in polyimide seal face surface.

Main channel is divided into import side chamber 100 corresponding with import and the outlet side chamber being connected to corresponding with outlet by primary valve, When the sealing surface of main valve plug contacts sealing cooperation with primary valve, import and export side chamber is mutually separated, and the inlet and outlet of valve body is not Connection, when the sealing surface of main valve plug and primary valve disengaging, import and export side chamber is interconnected, the import and outlet phase of primary valve It is intercommunicated.

In the present embodiment, for the locking stability for improving main valve plug, it is provided in valve body 1 to the application of main valve plug 3 and forces master The reset spring 5 mobile towards the direction being engaged with primary valve of spool 3, sets in the side away from primary valve of main valve plug 3 There is spring mounting hole, reset spring 5 is arranged in spring mounting hole, one end of reset spring 5 and the bottom hole top of spring mounting hole Press-fit, the other end are fixedly mounted on the press cooperation of the valve deck 4 on valve body 1, the side of valve deck 4 with by end cap fastening screw 27 Centre is provided with small washer A25 and hexagonal cylindrical head screw A26 matched with its, between valve deck 4 and valve body 1 be equipped with for realizing First O-ring 2 of the two static seal.

In the present embodiment, spring mounting hole and valve body on main valve plug form back pressure cavity 300, and back pressure cavity 300 passes through setting It is connected in the throttle orifice 200 on main valve plug with import side chamber 100, also, back pressure cavity is connected to by control channel with outlet side chamber, Control valve port and the control valve core 7 with control valve port corresponding matching are equipped in control channel, control valve core 7 up and down reciprocatingly acts The conducting of control channel can be achieved, disconnect.

When control valve core 7 and control valve port are separated, control channel is connected, and the gas in back pressure cavity 300 is logical through controlling Road moment is discharged into outlet side chamber, and the gas pressure in back pressure cavity 300 reduces rapidly, due to the gas pressure in import side chamber 100 Power is greater than back pressure cavity 300, and main valve plug 3 overcomes action of reset spring power mobile under gas differential pressure effect, and main valve plug opening is main logical Road conducting, the connection of import and export side chamber, the inlet and outlet connection of valve body.When control valve core 7 is in contact with control valve port, control Channel processed disconnects, and the gas in back pressure cavity 300 gradually rises to equal with gas pressure in import side chamber 100, in back pressure cavity 300 Under the back pressure effect of middle gas and under the elastic acting force of reset spring, main valve plug 3 is closed, and main channel disconnects, the import of valve body It is disconnected with outlet.

In the present embodiment, the work side of the working method of main valve and the valve in the prior art with back pressure cavity and reset spring Formula is identical, and details are not described herein.

There is electromagnet 8 by electromagnet fixing screws component fixing assembling on valve body 1, electromagnet 8 is used for drive control valve 7 reciprocating action of core with realize control channel on-off control, electromagnet fixing screws component herein be specially small washer B28 and Hexagonal cylindrical head screw B29 matched with its.Also, electromagnet heat insulating mattress 202 is provided between valve body 1 and electromagnet 8.

As shown in Figure 1, electromagnet 8 includes the armature 16 that moves back and forth along the vertical direction and for driving armature reciprocating action Electromagnetic coil, up and down direction herein is identical as the reciprocating movement direction of control valve core 7, armature 16 be equipped with along armature it is reciprocal The mounting hole that the direction of motion extends is connected through a screw thread fastening in mounting hole and is equipped with valve rod 18, valve rod 18 by pin 24 with Control valve core 7 is sequentially connected, and armature 16 passes through 18 drive control spool reciprocating action of valve rod.Electromagnetic coil herein specifically includes Direction spaced apart burst at the seams circle and pass coil are moved back and forth along armature, is equipped with magnet steel between circle and pass coil bursting at the seams, this The magnet steel at place mainly applies locking active force to armature, and electromagnet further includes the upper buting iron 151 and cloth for being arranged in 16 top of armature The lower buting iron 152 below armature is set, cooperatively forms the stroke limit to armature using the block of upper and lower buting iron and armature.Fig. 1 Shown in armature 16 and lower 152 block of buting iron cooperate.

It should be noted that the magnetic steel material of electromagnet 8 selects SmCo, the material coercivity is larger, under the high temperature conditions Decaying reduces, in addition, magnet steel carries out stablizing processing at 180 DEG C of high temperature after magnetizing, guarantees magnet steel locking force in the hot conditions Under lesser decaying.

In the present embodiment, when the circle that bursts at the seams is powered, the locking active force of magnet steel is overcome, armature 16, which moves up, to be pressed against On buting iron 151, valve rod follows armature 16 to move upwards together with control valve core 7 at this time, and control valve core and control valve port are detached from, Control channel conducting.Then, the circle that bursts at the seams disconnects, and is locked at armature by the locking active force that magnet steel provides and matches with upper buting iron block The open position of conjunction.When closing coil energization, the locking active force of magnet steel is overcome, armature 16, which moves down, to be pressed against on lower buting iron, this When, valve rod follows armature 16 to move downward together with control valve core 7, and control valve core is contacted with control valve port, and control channel is disconnected It opens.Then, coil is closed to disconnect, the locking active force provided from magnet steel armature 16 is locked at with lower 152 block of buting iron Off-position.

In fact, valve body is equipped with the spool mounting hole being connected to control channel, control valve core is arranged in spool mounting hole In, spool mounting hole is the face-up stepped hole of the ladder that vertically extends, be equipped with locating piece in stepped hole, locating piece with The 4th O-ring 22 is equipped between stepped hole to realize sealing assembly between the two.Locating piece has the cascaded surface with stepped hole Corresponding press fitting flange is equipped with the valve rod mounting hole passed through for valve rod corresponding with valve rod, in valve rod mounting hole on the positioning element Equipped with the third O-ring 21 with valve stem slides sealing cooperation, also, third O-ring 21 is by being mounted on the pressing plate on locating piece top 19 press fitting positioning, pressing plate 19 are sleeved on valve rod 18, and valve rod 18 is equally slidably matched with pressing plate 19.Also, in the present embodiment, valve The lower hole section of bar mounting hole is that cascaded surface ladder directed downwardly installs hole section, is disposed in ladder installation hole section and is sleeved on valve rod 18 On guide assembly 23.

In addition, the lower buting iron of electromagnet has the positioning section extended down into spool mounting hole, positioning section and pressing plate 19 And locating piece corresponds to block cooperation, so, electromagnet 8 is being fixedly mounted on valve body using electromagnet fixing screws component When on 1, electromagnet can cooperate locking locating piece and pressing plate with valve body.

It should be noted that since heat insulating mattress is arranged between electromagnet and valve body, so, to avoid the occurrence of interference, There are corresponding perforation on heat insulating mattress with the hexagonal in the positioning section and electromagnet fixing screws component that are had by above-mentioned lower buting iron Fillister head screw B29 is passed through.

In the present embodiment, it is provided with position and shows switch 11 with the position for detecting control valve core, meanwhile, feedback can be corresponded to The working condition of electromagnet 8, position herein show switch 11 and are specifically fixedly mounted on electromagnet 8.Position, which is shown, is equipped with two in switch 11 A microswitch 36, two microswitches 36 are fixedly mounted in aobvious switch in place by screw respectively, and the lower part of microswitch is equipped with Triggering end.Due to control valve core and armature synchronization action, so, two microswitches herein are used for by moving armature touching in place Hair is with the position of display control spool.

In fact, being equipped in aobvious switch in place through mandril 14 and 16 fixing assembling of armature to follow armature to move back and forth Tabletting 13, mandril 14 be connected through a screw thread fastening be assemblied in the mounting hole of armature, also, in mounting hole with mandril 14 and valve It is equipped with lock-screw 17 between bar 18, carrys out fixed armature 16 first with clamp in installation locking screw 17, then utilizes screw Lock-screw 17 is screwed into mounting hole by knife.Lock-screw 17 is connect with mandril 14, valve rod 18, also, to prevent product from shaking Rotating ring loosens under border, dispensing processing is carried out to lock-screw 17, in order to guarantee that dispensing quality and the lock-screw 17 of product can Locking completely, lock-screw front end portion are polished rod, guarantee the filling of glue.

It is equipped with ladder rod segment on mandril top, tabletting 13 is sleeved in ladder rod segment, and ladder rod segment, which has, deviates from valve rod 18 Cascaded surface, spiral, which is equipped with, on mandril is pressed the fastening nut being fixed in ladder rod segment for tabletting, in tabletting 13 and fastening Tabletting adjusting pad 12 is equipped between nut, fastening nut herein is specially hexagonal cylindrical head screw E35, corresponding hexagonal cylindrical head Screw E35 is mating to be disposed with small washer E34.

Since armature can also rotate while up and down reciprocatingly acting, therefore tabletting caused by armature cannot have in order to prevent The problem of effect triggering microswitch, position, which is shown, corresponds to tabletting equipped with limiting slot 40 in switch, limiting slot 40 is used to match with tabletting limit It closes to prevent tabletting from rotating.

In the present embodiment, the aobvious switch in position actually includes that the position being sealingly mounted on electromagnet 8 shows shell 41, and two fine motions are opened It closes and tabletting 13 is arranged in position and shows in shell 41, the aobvious shell 41 itself in position, which has, facilitates the side of observation and installation opening, top Portion's opening and rear portion opening, corresponding, the side opening that position shows shell 41 is packaged with side cover plate 38, and position shows and opens at the top of shell Upper cover plate 37 is packaged at mouthful, the rear portion opening that position shows shell is packaged with back shroud 39.The two sides of upper cover plate 37 pass through pulvinulus Circle C30 and hexagonal cylindrical head screw C31 matched with its is mounted on aobvious switch in place, and the middle part of upper cover plate 37 is provided with pulvinulus Circle D32 and hexagonal cylindrical head screw D33 matched with its connect back shroud 39.Moreover, because microswitch must be placed at one In the environment of a sealing, if wetly enter in the aobvious switch in position, influence the reliability of electronic component, product in design in order to Shape is reduced, product reliability is improved, is shown between shell in side cover plate, upper cover plate and back shroud and position equipped with damp proof for sealing Polytetrafluoroethylene film layer, polytetrafluoroethylene film layer guarantees that moisture not can enter in the aobvious switch in position with a thickness of 0.06mm.

In addition, being shown in electromagnet 8 and position in the present embodiment and being equipped with gasket 9 between switch 11, also, also, in tabletting The aobvious switch adjusting pad 10 in position for adjusting distance between tabletting and microswitch is provided between 13 and mandril 14.

Latching valve provided by the present embodiment when in use, is powered, armature 16 is in electromagnetic attraction to the circle that bursts at the seams of electromagnet 8 The locking force that active force overcomes magnet steel to generate moves upwards, and armature 16 follows armature 16 together with control valve core 7 by valve rod It moves upwards, control valve core and control valve port are detached from, control channel conducting, and the gas in back pressure cavity 300 is through control channel moment It is discharged into outlet side chamber, the gas pressure in back pressure cavity 300 reduces rapidly, since the gas pressure in import side chamber 100 is greater than Back pressure cavity 300, main valve plug 3 overcome action of reset spring power mobile under gas differential pressure effect, and main valve plug is detached from primary valve, main valve Core opening, main channel conducting, the connection of import and export side chamber, the inlet and outlet connection of valve body.

Moreover, armature 16 is also with mandril and tabletting 13 when armature 16 is moved upwards by valve rod with control valve core It moves upwards, the press triggering microswitch 36 of tabletting 13, microswitch output signal indicates that control valve core is opened, at latching valve In open state.

When the pass coil to electromagnet 8 is powered, the locking active force of magnet steel is overcome, armature 16, which moves down, to be pressed against down On buting iron 152, at this point, valve rod follows armature 16 to move downward together with control valve core 7, control valve core connects with control valve port Touching, control channel disconnect.Then, it closes coil to disconnect, armature is locked at and keeps off with lower buting iron by the locking active force provided by magnet steel The off-position only cooperated.When control channel disconnects, the gas in back pressure cavity 300 gradually rise to gas pressure in import side chamber 100 Power is equal, and in back pressure cavity 300 under the back pressure effect of gas and under the elastic acting force of reset spring, main valve plug 3 is closed, main logical Road disconnects, and the inlet and outlet of valve body disconnects.

Moreover, armature 16 is also with mandril and tabletting 13 when armature 16 is moved downward by valve rod with control valve core It moves downward, tabletting 13 is detached from microswitch 36, and microswitch output signal indicates that control valve core is closed, and latching valve, which is in, to close Closed state.

In the present embodiment, latching valve can be applicable to temperature of fluid medium range and be -60 DEG C~210 DEG C (210 DEG C be medium Limiting temperature is chronically at 180 DEG C), it is responsible for the on-off of gas circuit.The latching valve can be generalized to the control system of civilian high-temperature medium In system, system control is realized by electric signal, realizes the intelligence of control system.In other embodiments, latching valve can also answer In liquid line.Due to being configured with heat insulating mattress between electromagnet and valve body, it is suitably applied in high-temperature medium place.

In the present embodiment, electromagnet includes burst at the seams circle, pass coil and magnet steel.In other embodiments, electromagnet can also be only Single coil is set, moving up and down for armature can be controlled by inputting the electric current of different directions to coil.

In the present embodiment, the rotation of tabletting is limited by setting limiting slot in aobvious switch in place, in other embodiments, Can also by between the aobvious switch in mandril and position setting limit the structure of its rotation and limit armature and tabletting and rotate.

In the present embodiment, the back pressure cavity in valve body is connected to by throttle orifice with import side chamber, in other embodiments, valve body The valve body structure in solenoid valve disclosed in the utility model patent of Patent No. CN85201792 in the prior art can also be used.

The embodiment of electromagnet and electromagnet structure and the course of work in above-mentioned latching valve embodiment in the utility model It is identical, therefore be not repeated to illustrate.

Above-described specific embodiment, purpose of utility model, technical scheme and beneficial effects to the utility model It has been further described, it should be understood that the foregoing is merely specific embodiment of the present utility model, and Be not used in the restriction protection scope of the utility model, it is all within the spirit and principles of the present invention, done any repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this utility model.

Claims (10)

1. latching valve is equipped with main channel including the valve body with import, outlet in valve body, main valve seat is equipped in main channel, it is main logical Road includes the inlet side and outlet side positioned at main valve seat two sides, and valve body is equipped with the main valve cooperated with main valve seat in the inlet side Core is equipped with the reset spring for applying active force to main valve plug to force main valve plug to be closed in valve body, is additionally provided with back pressure cavity in valve body, Back pressure cavity is connected to by control channel with the outlet side, and control valve seat and corresponding control valve core, valve are equipped in control channel Body be equipped with for drive control spool movement electromagnet, the electromagnet include armature and be correspondingly arranged at armature both ends with The buting iron for limiting its stroke surrounds the electromagnetic coil being provided with for driving armature reciprocating action, feature in the outside of armature It is: is provided with heat insulating mattress between one end and corresponding buting iron towards valve body of electromagnetic coil.

2. latching valve according to claim 1, it is characterised in that: be equipped with heat insulating mattress between the valve body and electromagnet.

3. latching valve according to claim 1 or 2, it is characterised in that: be installed on the armature and the control valve core So that the valve rod that control valve core follows armature to move back and forth, armature, which is equipped with, moves back and forth direction extension along armature for transmission connection Mounting hole, the valve rod be connected through a screw thread fastening assembly in the mounting hole.

4. latching valve according to claim 3, it is characterised in that: the electromagnet is equipped with for detecting control valve core position The aobvious switch in the position set, the aobvious switch in position has to trigger for the armature by moving in place to be opened with the fine motion of display control spool position It closes.

5. latching valve according to claim 4, it is characterised in that: be additionally provided in the mounting hole and valve rod fixing assembling Lock-screw, the side away from the valve rod in mounting hole in lock-screw are connected through a screw thread fastening and are equipped with for touching The mandril for sending out microswitch described.

6. latching valve according to claim 5, it is characterised in that: be equipped with the use being installed on mandril in the aobvious switch of institute's rheme In the tabletting for triggering the microswitch.

7. latching valve according to claim 6, it is characterised in that: the mandril is equipped with ladder rod segment, ladder rod segment tool There is the cascaded surface away from the valve rod, spiral, which is equipped with, on the mandril is fixed on tabletting press fitting in the ladder rod segment Fastening nut, between tabletting and fastening nut be equipped with tabletting adjusting pad.

8. latching valve according to claim 5, it is characterised in that: the lock-screw have from close to valve rod one end to The optical axis section that mandril one end extends forms between optical axis section and the inner wall of mounting hole and is used for annular gap for dispensing glue.

9. electromagnet including armature and is correspondingly arranged at armature both ends to limit the buting iron of its stroke, surrounds in the outside of armature Be provided with the electromagnetic coil for driving armature reciprocating action, it is characterised in that: electromagnetic coil towards valve body one end with it is right Heat insulating mattress is provided between the buting iron answered.

10. electromagnet according to claim 9, it is characterised in that: the electromagnet is equipped with for detecting armature position The aobvious switch in position, the aobvious switch in position, which has, to be triggered for the armature by moving in place with the microswitch of display control spool position.