CN102563089B - Piloted solenoid valve - Google Patents
Piloted solenoid valve Download PDFInfo
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- CN102563089B CN102563089B CN201010624738.7A CN201010624738A CN102563089B CN 102563089 B CN102563089 B CN 102563089B CN 201010624738 A CN201010624738 A CN 201010624738A CN 102563089 B CN102563089 B CN 102563089B
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Abstract
The invention discloses a solenoid valve and in particular discloses a large-caliber piloted solenoid valve. The valve comprises main valve body components and outlet valve seat components fixed by being matched with the main valve body components, wherein the main valve body components are provided with a piston cavity; the outlet valve seat components are provided with a main valve port; piston components are also arranged opposite to the main valve port of the outlet valve seat components; the piston components are arranged or locally arranged in the piston cavity of the main valve body components; the piston components comprise a seal portion matched with the main valve port and a piston matching portion matched with inner wall of the piston cavity; and when the solenoid valve is closed, at least 2/3 of the piston matching portion is arranged in the piston cavity and are matched with the inner wall of the piston cavity. Therefore, the piston components can not radially deflect during reciprocation and move more reliably.
Description
Technical field
The present invention relates to flow control component, the guide electromagnetic valve of the control fluid cooling medium flowing particularly in a kind of refrigeration technology field.
Background technique
In refrigeration technology field, solenoid valve is the cold medium flux controlling component of chiller plant, and its working procedure is generally: along with energising or the power-off of coil, and solenoid valve opens or cuts out in the chiller plant systems such as air-conditioning, thus controls circulation and the interruption of refrigerant.Certainly, the Applicable scope of solenoid valve is not limited in above-mentioned refrigeration technology field, such as, is also widely used in Hydraulic Field.Some bigbore solenoid valves generally adopt leading type control and two-stage or multistage valve opening control mode.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of the solenoid valve of a kind of typical leading type in prior art; Fig. 2 is the structural representation of the valve seat of solenoid valve in Fig. 1.
As shown in Figure 1, solenoid valve comprises main valve, pilot valve, inlet tube 4 ', outer pipe 5 ' and is set in the electromagnetic coil (not shown in FIG.) of pilot valve outside.Main valve comprises valve seat 1 ', be arranged in the piston element 3 ' of the valve pocket of valve seat 1 ' and be positioned at the end cap 2 ' of valve seat 1 ' top.Valve seat 1 ' is provided with primary valve 1 ' 3, and along with rising or the decline of piston element 3 ', piston element 3 ' is opened or closed primary valve 1 ' 3, thus achieves conducting and the interruption of inlet tube 4 ' and outer pipe 5 '.
As shown in Figure 2, valve seat 1 ' is provided with fluid inlet 1 ' 1 and fluid output 1 ' 2, and fluid inlet 1 ' 1 is communicated with inlet tube 4 ', and fluid output 1 ' 2 is communicated with outer pipe 5 '.As shown in Figure 2, the axis of fluid inlet 1 ' 1 and fluid output 1 ' 2 all with the axes normal of primary valve 1 ' 3, the flow direction of fluid in solenoid valve inside is roughly as shown by arrows in FIG..
As shown by the arrows in Figure 2, through four 90 ° of turnovers, thus very large flow resistance to be defined in solenoid valve inside when fluid flows through solenoid valve inside.Given this, in order to ensure the flow required for acquisition, need the area increasing primary valve 1 ' 3; After the area increase of primary valve 1 ' 3, correspondingly, the area of the piston element 3 ' opened or close primary valve 1 ' 3 also will increase.The two area increases the increase that can cause manufacture cost on the one hand, is also unfavorable for the miniaturization of structure on the other hand.In addition, the increase of the two area, when piston element 3 ' closes primary valve 1 ' 3, the leakage rate of the two can increase, and thus can reduce sealability therebetween.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of solenoid valve, the structural design of this solenoid valve makes fluid have less flow resistance when flowing, thus use relatively little primary valve just can obtain required flow, and then relatively little piston element can be used, and in order to ensure reliability during piston element to-and-fro motion, reducing manufacture cost simultaneously and making miniaturized structure.
For solving the problems of the technologies described above, the invention provides a kind of solenoid valve of leading type, having fluid inlet and fluid output, solenoid valve comprises main valve body assembly, and described main valve body assembly is provided with a piston cavity volume; Described solenoid valve also comprises the outlet valve seat parts matching fixing with described main valve body assembly, and described outlet valve seat parts are provided with primary valve, relatively with the primary valve of described outlet valve seat parts is also provided with piston element; Described piston element is arranged in or is locally positioned at the piston cavity volume of described main valve body assembly, and can axial to-and-fro motion be carried out, selectively to open or to close described primary valve, described piston element comprises the sealed department coordinated with described primary valve, the piston auxiliary section coordinated with the inwall of described piston cavity volume; When closed electromagnetic valve, described piston auxiliary section has at least 2/3 to be positioned at described piston cavity volume and coordinate with the inwall of described piston cavity volume.When solenoid valve is opened, described piston auxiliary section is all positioned at described piston cavity volume and coordinates with the inwall of described piston cavity volume.Like this, there will not be deflection during such piston element action thus make action relatively steadily reliable.
Preferably, described solenoid valve also comprises guide structure set in the piston cavity volume of described piston element and described interior valve seat.
Preferably, described guide structure comprises guide portion that described piston element is arranged and the positioning and guiding portion of relative set in the piston cavity volume of described interior valve seat;
Preferably, piston element is provided with the piston balance channel be communicated with between positioning and guiding portion and piston cavity volume.
Preferably, described guide portion is specially the directional post to described piston cavity volume diapire direction that described piston element is arranged, and the positioning and guiding portion of described piston element is specially the recess coordinated with described directional post of described piston cavity volume diapire setting; Piston element is provided with the piston balance channel be communicated with between described recess and piston cavity volume.
Preferably, described main valve body assembly comprises the outer seat of hollow, is positioned at the valve seat in the chamber of the hollow of described outer seat, and described interior valve seat is provided with piston cavity volume.
Preferably, described piston element comprises piston and is fixed on the piston seal plug on described piston, and piston seal plug is as the sealed department of described piston element.
Preferably, the radial direction of the piston auxiliary section of described piston is also provided with inside groove part, in described groove part, be provided with piston packing ring, effectively can improve coordinating of piston element and piston cavity volume like this.Further, make the center of gravity of piston element be positioned at the radial position at this position of piston packing ring, during such piston element reciprocating action, there will not be deflection, the action of piston element, all can be very steadily reliable with coordinating of piston cavity volume.
Preferably, in described groove part, be also provided with piston tightening hoop, described piston tightening hoop is arranged on the inside of piston packing ring for piston packing ring described in tensioning; Like this, piston element and piston cavity volume coordinate better and the tension force of tightening hoop is adjusted also more convenient.
Preferably, described piston element is also being provided with the circular groove recessed to described sealed department direction of an axis with the contrary one side of described sealed department; Preferably, described piston element is also being provided with piston guide rod with the contrary one side of described sealed department, and piston guide rod extends to form guide portion to the opposite direction of sealed department.
Preferably, the reciprocating axial direction of described piston element is consistent with the axial direction of described solenoid valve fluid inlet or parallel; The resistance of such fluid flowing is relatively little, thus can reduce the pressure loss of fluid.
Preferably, the sectional area of the piston auxiliary section (518) of described piston element is that described piston element is for arranging more than 1.8 times (comprising 1.8 times) of the sectional area at described sealed department position.Like this, when solenoid valve is opened, can corresponding increase fluid flow passageway, fluid is corresponding less by flow resistance during this position of solenoid valve, thus can reduce flow resistance and realize the miniaturization of structure of solenoid valve; The weight of piston element can also be alleviated in addition, improve solenoid valve low voltage activate performance, improve flexibility and the reliability of action.
From said structure, when piston element opens primary valve, fluid directly to be entered in main valve body assembly runner by fluid inlet and by the runner between piston element and outlet valve seat parts, and enter primary valve by the runner between described piston element and outlet valve seat parts again, and then entered by fluid output in the discharge connection of the solenoid valve be communicated with fluid output.Obviously, will be equivalent to the structural design of 90 ° of turnovers through four times relative to fluid in prior art, the present invention considerably reduces fluid turnover number of times and turning angle, and the flow resistance that thus fluid is subject to significantly reduces.
Because flow resistance obviously reduces, thus use less primary valve just can obtain required flow; The area of primary valve reduces, and the area of the piston element of thus closing or opening primary valve also can reduce accordingly, and then reduces manufacture cost and make miniaturized structure.Reciprocating reliability during in order to ensure to adopt the piston element after reducing, when solenoid valve is opened, the piston auxiliary section of piston element be arranged in piston cavity volume, even if when closed electromagnetic valve, at least 2/3 of the piston auxiliary section of piston element is made to be arranged in piston cavity volume, such piston element there will not be radial deflection when moving back and forth, move reliable; Further, be arranged so that the axis of solenoid valve can shorten relatively like this, thus ensure the miniaturization of solenoid valve.
The heavy caliber of the present invention's design, the solenoid valve of Large Copacity leading type pass through the optimal design of stream and structure, are relatively applicable to the guide electromagnetic valve of primary valve latus rectum at more than 10mm; When same bore, reduce the flow resistance in solenoid valve vent path, reduce the pressure loss; And for the product that same Kv value requires, solenoid valve profile provided by the present invention can be less, reduces raw-material use amount.The runner design of solenoid valve of the present invention, makes fluid have less flow resistance when flowing, thus uses relatively little primary valve just can obtain required flow, and then reduces manufacture cost and make miniaturized structure.And by the matching design between piston element and piston cavity volume, the to-and-fro motion of piston element is reliably steady.
Accompanying drawing explanation
Fig. 1 is the structural representation of the solenoid valve of a kind of typical leading type in prior art;
Fig. 2 is the structural representation of the valve seat of solenoid valve in Fig. 1;
Fig. 3 is the main pseudosection of solenoid valve in an embodiment of the present invention;
Fig. 4 is the top plan view of solenoid valve local in Fig. 3 embodiment;
Fig. 5 is the top plan view of the solenoid valve in Fig. 3 embodiment in open mode;
Fig. 6 is the structural representation of the main valve body assembly of solenoid valve in Fig. 3 and Fig. 4, Fig. 5;
Fig. 7 is the A-A part sectioned view of main valve body assembly in Fig. 6;
Fig. 8 is the close-up schematic view of the solenoid valve in Fig. 3 embodiment.
Embodiment
Core of the present invention is to provide a kind of solenoid valve of leading type, the structural design of this solenoid valve makes piston element relatively steadily reliable when to-and-fro motion, when closed electromagnetic valve, the piston auxiliary section of piston element still has more than 2/3 to be positioned at piston cavity volume and matches with the inner wall part of piston cavity volume.
In order to make those skilled in the art understand technological scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, wherein Fig. 3 is the main pseudosection of the solenoid valve of leading type in an embodiment of the present invention, Fig. 4 is the top plan view of solenoid valve in Fig. 3 embodiment, Fig. 5 is the partial top sectional view of the solenoid valve in Fig. 3 embodiment in open mode, Fig. 6 is the structural representation of the main valve body assembly of solenoid valve in Fig. 3 and Fig. 4, Fig. 5, Fig. 7 is the A-A part sectioned view of main valve body assembly in Fig. 6, and Fig. 8 is the close-up schematic view of the solenoid valve in Fig. 3 embodiment.
As shown in the figure, the solenoid valve of leading type provided by the present invention, comprise main valve body assembly 1, pilot valve parts 2, be fixed on the electromagnetic coil (not shown in FIG.) outside pilot valve parts 2, the outlet valve seat parts 7 fixing with described main valve body assembly 1, outlet valve seat parts 7 comprise outlet valve seat 71 and discharge connection 72; The fluid output 74 that outlet valve seat 71 is provided with fluid output primary valve 73 and flows out from primary valve 73; The pilot valve sleeve pipe 22 of pilot valve parts 2 is fixed with main valve body assembly 1; Solenoid valve is also provided with reciprocating piston element 5, and piston element 5 to-and-fro motion under the control of fluid opens or closes primary valve 73, thus realizes unlatching or the closedown of solenoid valve.
Particularly, main valve body assembly 1 comprise the main valve body 11 of hollow, the entrance sleeve 13 be fixedly connected on main valve body 11, main valve body 11 main receiving cavity 114 internal fixtion of hollow be provided with interior valve seat 12, in order to reduce the resistance of fluid flowing, main receiving cavity 114 is arranged to entrance sleeve 13 coaxial; Main receiving cavity 114 also can be arranged to depart from certain distance with entrance sleeve 13 and both parallel modes in addition.Be provided with the pilot valve portion 110 matched with pilot valve parts at the sidepiece of the radial direction of main valve body 11, have pilot valve cavity volume 111 in pilot valve portion 110, pilot valve portion 110 is provided with pilot valve mouth 112.Have between pilot valve mouth 112 with discharge connection 72 one be communicated with both pilot valve outlet passage 115.In the present embodiment, pilot valve outlet passage 115 is that local is positioned on guide valve seat, and by an adapter connection outlet adapter 72, such main valve body uses material relatively less; Can certainly be other connection conduction mode, as main valve body 11 being arranged to a male part and passage being set directly in the male part of main valve body 11 etc.The main receiving cavity 114 of main valve body 11 comprises the fluid inlet 117 near entrance sleeve 13, position is provided with the first positioning part 116 for locating with interior valve seat 12 therebetween, is also provided with for the second positioning part 113 with outlet valve seat parts 7 stationary positioned at the opposite side away from fluid inlet 117; Two positioning parts arrange a stepped part formation by each in the present embodiment particularly; Other orientation type can certainly be adopted.Interior valve seat 12 is fixedly installed in the main receiving cavity 114 of main valve body 11, in in the present embodiment, valve seat 12 has two protuberances 126, protuberance 126 matches with the first positioning part 116 of the main receiving cavity 114 of main valve body 11 and obtains axial, radial location, particularly, the first positioning part 116 of the some of two protuberances 126 of interior valve seat 12 and the main receiving cavity 114 of main valve body 11 is abutted against by interior valve seat 12 being loaded or being pressed into main receiving cavity 114 and obtains axially locating; Two protuberances 126 of interior valve seat 12 can adopt the mode of close-fitting to fix with the first positioning part 116 of the main receiving cavity 114 of main valve body 11; More reliable in order to make both coordinate, can also after both are fixing, adopting the mode of welding to fix further, all can realize both reliable fixing as adopted the modes such as spot welding, stove weldering or soldering.Other structure or position mode can also be adopted in addition between interior valve seat and main valve body, as both disalignments but both axis parallel, particularly as interior valve seat is adopted eccentric setting; Location between the two can also adopt the inner wall part of the main receiving cavity at main valve body to arrange guide-localization groove in addition, and the mode of corresponding protuberance location is set on interior valve seat, the shape of groove can have the multiple shape easily realizing as dihedral, square etc. and process; In addition for reducing the use of material, corresponding guide-localization groove also can also be set on interior valve seat, then adopt guide-localization part to snap in main valve body or interior valve seat, reinstalling interior valve seat or main valve body; And then use the modes such as welding to carry out the fixing of three further.
Interior valve seat 12 is provided with piston cavity volume 122 in the side away from entrance sleeve 13, and the opening of piston cavity volume 122 is towards primary valve; The bottom of piston cavity volume 122 is also provided with positioning and guiding portion 123, and interior valve seat 12 is also provided with the balance channel 121 of hyperbaric chamber 1141 connection that piston cavity volume 122 is communicated with entrance sleeve 13.On main valve body assembly 1, be also provided with the pilot valve inlet passage 14 being communicated with piston pressure chamber 1221 and pilot valve pressure chamber 1111 simultaneously, for making solenoid valve action more reliable, the through-current capacity of pilot valve inlet passage 14 is greater than balance channel 121, the through-current capacity of pilot valve outlet passage 115, preferably, the minimum cross-sectional flow area of pilot valve inlet passage 14 is greater than the minimum cross-sectional flow area of pilot valve outlet passage 115, and the minimum cross-sectional flow area of pilot valve outlet passage 115 is more than 2 times of the minimum cross-sectional flow area of balance channel 121, if the cross-sectional flow area of pilot valve outlet passage 115 is less than 2 times of cross-sectional flow area of balance channel 121, when solenoid valve is opened, the pressure in piston pressure chamber 1221 can not effectively be reduced, thus affect the foundation of the pressure difference of piston pressure chamber 1221 and piston assembly opposite side, cause solenoid valve can not reliablely and stablely opening action.
The assembly of main valve body described in the present embodiment is the solid of rotation of general cylindrical, and fluid inlet 117 is offered along the axis of main valve body assembly 1.It should be noted that at this, the profile of main valve body assembly 1 also can be that other shape is as square or hexagon.
Solenoid valve also comprises piston element 5, and in the present embodiment, piston element 5 is the solid of rotation of general cylindrical, and piston element 5 comprises piston 51, piston seal plug 52, sealing plug pad 53, fastening piece, piston seal plug 52 is just as the sealed department of piston element; In the present embodiment, fastening piece have employed fastening screw trip bolt 54, in addition, also can adopt other means of fixation, as fixed by crimping mode.In addition, piston 51 and piston seal plug also can be that one is formed, and so just do not need fastening piece to fix.Wherein, piston 51 comprises piston auxiliary section 518, the minor diameter part 517 less than piston auxiliary section opposite outside diameter, and in the present embodiment, the sealed department of piston element is be arranged at the piston seal plug 52 on described minor diameter part 517; Match substantially with piston cavity volume 122 inwall in the piston auxiliary section 518 of piston 51, piston 51 can carry out axially reciprocating to drive piston element to-and-fro motion thus make piston seal plug 52 separate with primary valve 73 phase or contact thus open and close primary valve 73 along piston cavity volume 122; In order to ensure the reliable of reciprocating motion of the pistons, piston auxiliary section 518 great majority of piston 51 are arranged in the piston cavity volume 122 of valve seat, and the piston auxiliary section 518 being wherein arranged in the piston cavity volume 122 of valve seat at least will more than 2/3.In order to make piston 51 and piston cavity volume 122 have good sealability, in the present embodiment, also on the piston auxiliary section 518 of piston 51, be provided with piston packing ring 55 and piston tightening hoop 56.Particularly, that the outside wall portions position coordinated with the inwall of piston cavity volume 122 of piston 51 is provided with inside groove part, piston tightening hoop 56 and piston packing ring 55 are placed in groove part, make piston tightening hoop 56 conflict inner wall part direction from piston packing ring 55 to piston cavity volume and make piston packing ring 55 outwards contact with the inner wall part of piston cavity volume 122 and seal; Piston packing ring can adopt PTFE or add the PTFE mixture of other compound as poly-stupid ester, carbon fiber etc., also can adopt rubber-like sealing material in addition.In order to the to-and-fro motion making piston element 5 is more flexible, at piston 51, the side of the piston cavity volume of interior valve seat is provided with circular groove 511 in the present embodiment, the weight of such piston 51 can obviously alleviate, and makes piston movement flexible; And make piston 51 be slightly less than piston auxiliary section near the position of described piston cavity volume bottom wall portion, the area of contact both reducing like this, piston is the corresponding reduction of reciprocating resistance in piston cavity volume.Reliable during in order to make piston movement, be also provided with piston guide rod 512 at the middle part of piston, be also provided with elastic member between piston element 5 and interior valve seat 12, particularly as piston spring 6, in the present embodiment, piston spring 6 is specifically set on piston guide rod 512.Specifically being provided with positioning section 57 at the head of piston guide rod 512, locating for coordinating with the positioning and guiding portion 123 of interior valve seat 12; In order to avoid forming sealed cavity between piston 51 and the positioning and guiding portion 123 of interior valve seat 12, in the head location section 57 of piston guide rod 512, an axial bore be communicated with the positioning and guiding portion 123 of interior valve seat 12 516, piston equalizing orifice 515 be communicated with piston cavity volume 122 is provided with in the present embodiment, piston equalizing orifice 515 is communicated with axial bore 516 simultaneously, the cavity of relative closure would not be formed between such piston 51 and the positioning and guiding portion 123 of interior valve seat 12, thus the left and right reciprocating action of piston element can not be affected; Certain piston balance channel is not limited to this mode, as adopted the mode of inclined hole conducting or arrange conduction trough mode conducting of being inwardly recessed etc. on the positioning section 57 of piston.Guide structure in addition between piston element and interior valve seat can also be alternate manner, as set up corresponding guiding groove or guiding rib etc. separately between the outside wall portions of piston element with the inner wall part of the piston cavity volume of interior valve seat.
The sectional area of piston auxiliary section 518 is relatively greater than the sectional area of the minor diameter part 517 for arranging piston seal plug 52 thus forms a step surface 519, as in the present embodiment, the sectional area of the piston auxiliary section 518 of piston element is described piston element for arranging more than 1.8 times of the sectional area at minor diameter part 517 position of described sealed department, preferentially, the sectional area of the piston auxiliary section 518 of piston element is described piston element for arranging more than 2 times of the sectional area at minor diameter part 517 position of described sealed department.Like this, piston element two ends easily form pressure reduction Driving force (pressure P * area S) when low pressure, thus improve low voltage activate performance, as shown in Figure 5, when solenoid valve is opened, piston auxiliary section 518 is all arranged in piston cavity volume, and make solenoid valve not have obvious flow resistance at piston seal plug 52 position from the flow fluid of coming of fluid inlet thus do not have larger Pressure Drop thus make the flow resistance of solenoid valve concentrate on primary valve position, thus obtain good fluid passage, and make solenoid movement reliable and stable.
Piston pressure chamber 1221 is defined between such solenoid valve inner carrier parts 5 and interior valve seat 12, there is balance channel 121 in piston pressure chamber 1221 respectively towards the hyperbaric chamber 1141 be communicated with high pressure adapter 13 between main valve body 11 with interior valve seat 12, namely piston pressure chamber 1221 is communicated with hyperbaric chamber 1141 by balance channel 121, and be communicated with pilot valve pressure chamber 1111 by pilot valve inlet passage 14, thus be optionally connected with outlet side low-pressure cavity by pilot valve mouth, pilot valve outlet passage further.
Sealability during in order to ensure closed electromagnetic valve between piston element and primary valve 73, at piston 51, primary valve 73 side of outlet valve seat 71 is provided with a circular groove in the present embodiment, for placing piston seal plug 52, in addition in order to ensure the reliability that piston seal plug 52 is fixing with piston 51, be partial to primary valve side at piston seal plug 52 and be also provided with sealing plug pad 53, and by fastening screw trip bolt 54, piston seal plug 52, sealing plug pad 53 are fixed on piston 51.Certainly, piston seal plug 52 and piston 51 can also be wholely set, and so just can not otherwise fix.
Relative with described piston element 5 is outlet valve seat parts 7, outlet valve seat parts 7 comprise outlet valve seat 71 and discharge connection 72, both are fixed together by welding, outlet valve seat 71 is provided with primary valve 73, an inner fovea part 711 is also provided with in the outside of primary valve 73, substantially be streamlined design from the close main valve side of outlet valve seat 71 to the inner wall part inner fovea part 711, thus reduce fluid flow resistance.Primary valve 73 is oppositely arranged with the piston seal plug 52 of piston element 5, the present embodiment middle outlet valve base part 7 and main valve body assembly 1 are fixed together by welding, like this, both eliminate the mode of to be fixed by flange and utilizing seal ring to seal, and connect more reliable; And owing to eliminating the use of seal ring, such working life also can improve; And use material also can reduce, thus reduce the use amount of material.Certainly, the means of fixation by other between outlet valve seat parts 7 and main valve body assembly 1 is yet fine, as fixed etc. by flange-type with original the same.
Like this, piston element 5 under control to-and-fro motion time, just selectively open or close primary valve 73, namely achieve unlatching or the closedown of solenoid valve.
The sidepiece of main valve body 11 radial direction of main valve body assembly 1 is provided with pilot valve portion 110, the pilot valve of solenoid valve comprises pilot valve portion 110 and pilot valve parts 2, pilot valve parts 2 by pilot valve sleeve pipe 22 and the pilot valve portion 110 of main valve body 11 be weldingly connected connect fixing, particularly as being fixed by argon welding or soldering or other welding manners.There is in pilot valve portion 110 pilot valve cavity volume 111, pilot valve mouth 112, have between pilot valve mouth 112 and the low-pressure cavity of the outlet side of solenoid valve one be communicated with both conductive channel, be provided with pilot valve outlet passage 115 between pilot valve mouth 112 and discharge connection 72 in the present embodiment, also the outlet valve seat 71 be connected with discharge connection 72 can be connected in addition, equally also object of the present invention can be reached.
The pilot valve sleeve pipe 22 that pilot valve parts 2 comprise with pilot valve portion is welded and fixed, away from pilot valve mouth 112 and and pilot valve sleeve pipe 22 be tightly connected end socket 21, core iron part 24 in pilot valve sleeve pipe 22, be arranged on core iron returning spring 23 between end socket 21 and core iron part 24, core iron sealing plug 27, the sealing plug stop pad 28 for fixing core iron sealing plug 27, damping spring 26 that relative pilot valve mouth 112 is arranged; Core iron sealing plug 27 is fixed on core iron part 24 substantially, namely in the present embodiment, core iron sealing plug 27 can do little movement relative to core iron part 24 in axis is axially fixing relatively movably, can alleviate the impact of core iron sealing plug 27 pairs of pilot valve mouths 112 like this when core iron part 24 does axial motion.Like this, pilot valve portion 110 just defines a pilot valve pressure chamber 1111 after completing with pilot valve assembling parts, in addition, main valve body assembly 1 is also provided with the pilot valve inlet passage 14 of the pilot valve pressure chamber 1111 of a conducting piston pressure chamber 1221 and pilot valve.Pilot valve pressure chamber 1111 is connected with the discharge connection 72 of solenoid valve when pilot valve mouth 112 is opened and becomes relatively low pressure chamber, and be connected with the piston pressure chamber 1221 of solenoid valve again, like this, piston pressure chamber 1221 also becomes relatively low pressure chamber simultaneously; Then cut off when pilot valve mouth 112 is closed and being communicated with of the discharge connection 72 of solenoid valve, and be only connected with the piston pressure chamber 1221 of solenoid valve.
In order to ensure the coaxality between outlet valve seat parts 7 and piston element 5, the main valve body 11 of main valve body assembly is also provided with positioning reference plane 118, such outlet valve seat parts 7 can have good coaxality when coordinating with main valve body assembly 1, like this, when the coaxality of main valve body 11, interior valve seat 12, piston element 5 is ensured, coaxality between the primary valve 73 of piston element 5 and outlet valve seat parts 7 have also been obtained guarantee, and positioning reference plane 118 coordinates with outlet valve seat parts 7 peripheral side.This structural design to achieve between outlet valve seat parts 7 and main valve body assembly 1 location diametrically easily, and reliability is higher.
Interior valve seat 12 is also provided with positioning and guiding portion 123 in the bottom of piston cavity volume 122, and accordingly, piston element 5 is provided with the positioning section 57 matched with positioning and guiding portion 123.This structural design can make piston element 5 in movement process vertically, moves more stable, and piston element 5 generally can not be offset diametrically, thus ensures coordinating between piston element 5 and the primary valve 73 of outlet valve seat 71.In addition, radial location between piston element 5 and interior valve seat 12 can also adopt other orientation types, as arranged guiding rib at the inwall of interior valve seat 12, the guiding groove or contrary setting etc. that match correspondingly are set at the outer wall of piston element 5, the positioning requirements of the radial direction between both can be met.
Particularly, the working principle of solenoid valve is substantially as follows, and pilot valve inlet passage 14, pilot valve mouth 112, pilot valve outlet passage 115 define the pilot passage of solenoid valve.When solenoid valves, core iron part 24 moves to end socket 21 direction under the effect of electromagnetic force, core iron part 24 drives core iron sealing plug 27 to leave pilot valve mouth 112, and pilot valve mouth 112 is opened, and piston pressure chamber 1221 is communicated with discharge connection 72 by above-mentioned pilot passage.Bore due to above-mentioned pilot passage is obviously greater than the bore of balance channel 121, the through-current capacity of pilot passage is obviously greater than the through-current capacity of balance channel 121, the pressure in the piston pressure chamber 1221 thus now on the left of piston element 5 is comparatively close to the pressure in discharge connection 72, because discharge connection 72 place is relatively low pressure end, the pressure thus in piston pressure chamber 1221 is relatively little.Now, the fluid of being come in by fluid inlet adapter 13 enters the valve pocket between main valve body 11 with interior valve seat 12 and becomes relative hyperbaric chamber 1141, and enter and be positioned at primary valve 73 outer circumferential and piston element 5 and main valve body assembly 1, cavity between outlet valve seat 71, as Fig. 5, because fluid inlet adapter 13 place is relatively high pressure end, thus the right side of piston element 5 is relative high voltage terminal, the pressure of the hyperbaric chamber on the right side of piston element 5 overcomes the pressure in the piston pressure chamber 1221 on the left of piston element 5 and the elastic force of piston spring 6, promote piston element 5 to left movement, thus achieve primary valve 73 and open.The elementary process of fluid flowing is: the fluid of being come in by fluid inlet adapter 13, by the fluid inlet 117 of main valve body assembly, main valve body assembly runner 119 between main valve body 11 and interior valve seat 12, enter primary valve 73, and then flow in the discharge connection 72 that is communicated with primary valve 73.
When solenoid valve no electric circuit, core iron part 24 moves to the direction away from end socket 21 under the effect of the spring force of returning spring 23, core iron part 24 drives core iron sealing plug 27 guide valve port 112 direction to move, pilot valve mouth 112 is closed, and the pilot passage that piston pressure chamber 1221 is communicated with discharge connection 72 is cut off because pilot valve outlet passage 115 is cut off.Piston pressure chamber 1111 interruption is communicated with discharge connection 72 low voltage terminal, under the effect of balance channel 121, pressure in piston pressure chamber 1221 slowly raises, the last pressure close to equaling fluid inlet adapter 13 high voltage terminal, thus under the acting in conjunction of the spring force of pressure difference and piston spring 6, piston element 5 moves right, and primary valve 73 is closed.
From said structure, when piston element 5 opens primary valve 73, fluid directly enters the main valve body assembly runner 119 between the circumferential side wall of main valve body 11 and the outer wall of described interior valve seat 12 by fluid inlet adapter 13, and enter primary valve 73 by main valve body assembly runner 119 again, and then enter in the discharge connection 72 of the solenoid valve be communicated with primary valve 73.Obviously, will through the structural design of four 90 ° of turnovers relative to fluid in prior art, the present invention considerably reduces fluid turnover number of times and angle, and flow passage resistance of the present invention obviously reduces, and the flow resistance that thus fluid is subject to when identical flow area can significantly reduce.Or the design size of solenoid valve obviously can be reduced when uniform pressure is lost.
Like this, in identical fluid resistance situation, relatively can reduce the design latus rectum of primary valve 73.Because flow resistance obviously reduces, less primary valve 73 thus can be used just can to obtain required flow when requiring same through-current capacity and flow resistance; The area of primary valve 73 reduces, and the area of the piston element 5 of thus closing or opening primary valve 21 also can reduce accordingly, and then reduces manufacture cost and make miniaturized structure.In addition, the area of primary valve 73 and piston element 5 reduces, and when piston element 5 closes primary valve 73, leakage rate therebetween also can correspondingly reduce, and thus can improve sealability therebetween, thus improves the performance of solenoid valve.
On the basis of above-described embodiment, resistance when flowing to make refrigerant is less, the position of convection cell import can also make concrete setting.Such as, by making the axis collinear of the primary valve 73 of entrance sleeve 13 and outlet valve seat 71, or both axis being parallel, and spacing is less.Obviously, this structural design can reduce flow resistance further.In addition, as shown in the figure, in the present embodiment, the sectional shape of main valve body assembly runner 119 is roughly the combination of 2 curved circular ring-types, also can be set to a curved circular ring-type in addition; In order to reduce flow resistance further, the aperture A of fluid inlet 117 is preferably more than the internal diameter of circular runner 119, and in other words, the aperture A of fluid inlet 117 needs the external diameter B being greater than interior valve seat 12.In addition, the axis of fluid inlet 117 and the axis of primary valve 73 can be arranged in parallel, particularly, outlet valve seat 71 and fluid inlet 117 are deviated, makes fluid inlet 117 can reduce to the resistance of main valve body assembly runner equally.
As can be seen from also upper, heavy caliber guide electromagnetic valve of the present invention completes by main valve body and interior valve seat are carried out assembling due to main valve body assembly, such manufacture processing is simple and convenient, use material also relatively less, in addition, main valve body and interior valve seat can also be fixed together by welding, and carry out precision machining after welding, thus the coaxality both ensureing, and the coaxality of the primary valve of piston element and outlet valve seat parts is made to be ensured further; In addition between outlet valve seat parts 7 with main valve body assembly 1 by weld carry out sealing fix, eliminate flange connection of the prior art, be fixedly connected with more reliable like this, also there will be no the problem causing because seal ring is aging and leak outside, in addition, simplify design, decrease amount of parts.
It should be noted that, in the above-described embodiments, only make a kind of concrete setting for realizing piston element 5 reciprocating structure in piston cavity volume, and the other structure that can realize this function also should within protection scope of the present invention.The various orientation word mentioned in specification of the present invention such as upper and lower, inside and outside, left, right, front and rear etc. is for convenience of description, and should not be limitation of the present invention.
Above a kind of solenoid valve provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and mode of execution, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a solenoid valve for leading type, has fluid inlet and fluid output, it is characterized in that: described solenoid valve comprises main valve body assembly (1), and described main valve body assembly (1) is provided with a piston cavity volume (122); Described solenoid valve also comprises the outlet valve seat parts (7) matching fixing with described main valve body assembly (1), described outlet valve seat parts (7) are provided with primary valve (73), relatively with the primary valve (73) of described outlet valve seat parts (7) are also provided with piston element (5); Described piston element (5) is arranged in or is locally positioned at the piston cavity volume of described main valve body assembly, and can axial to-and-fro motion be carried out, selectively to open or to close described primary valve (73), described piston element (5) comprises the sealed department coordinated with described primary valve, the piston auxiliary section coordinated with the inwall of described piston cavity volume (122); When closed electromagnetic valve, described piston auxiliary section has at least 2/3 to be positioned at described piston cavity volume (122) and coordinate with the inwall of described piston cavity volume (122); The solid of rotation that described main valve body assembly (1) is general cylindrical, it comprises the main valve body (11) of hollow, is positioned at the valve seat (12) in the chamber of the hollow of described main valve body (11), described interior valve seat (12) and described main valve body (11) are by being welded and fixed, and described interior valve seat (12) is provided with piston cavity volume (122).
2. guide electromagnetic valve as claimed in claim 1, is characterized in that, described solenoid valve also comprises guide structure set in the piston cavity volume of the interior valve seat (12) of described piston element (5) and described main valve body assembly.
3. guide electromagnetic valve as claimed in claim 2, it is characterized in that, described guide structure comprises the guide portion of the upper setting of described piston element (5) and the positioning and guiding portion in the middle relative set of the piston cavity volume (122) of described interior valve seat (12); Piston element (5) is provided with the piston balance channel be communicated with between positioning and guiding portion and piston cavity volume.
4. guide electromagnetic valve as claimed in claim 3, it is characterized in that, described guide portion is specially the upper directional post to described piston cavity volume (122) diapire direction arranged of described piston element (5), and the positioning and guiding portion of described piston element is specially the recess coordinated with described directional post of described piston cavity volume (122) diapire setting; Piston element (5) is provided with the piston balance channel be communicated with between described recess and piston cavity volume.
5. the guide electromagnetic valve as described in as wherein arbitrary in claim 1-4, it is characterized in that, described piston element comprises piston and is fixed on the piston seal plug on described piston, and piston seal plug is as the sealed department of described piston element.
6. guide electromagnetic valve as claimed in claim 5, it is characterized in that, the radial direction of the piston auxiliary section of described piston is also provided with inside groove part, in described groove part, be provided with piston packing ring.
7. guide electromagnetic valve as claimed in claim 6, it is characterized in that, in described groove part, be also provided with piston tightening hoop, described piston tightening hoop is arranged on the inside of piston packing ring for piston packing ring described in tensioning.
8. the guide electromagnetic valve as described in as arbitrary in claim 1-4, is characterized in that, described piston element is also being provided with the circular groove recessed to described sealed department direction of an axis with the contrary one side of described sealed department; Described piston element is also being provided with piston guide rod with the contrary one side of described sealed department, and piston guide rod extends to form guide portion to the opposite direction of sealed department.
9. the guide electromagnetic valve as described in as arbitrary in claim 1-4, it is characterized in that, described piston element (5) reciprocating axial direction is consistent with the axial direction of described solenoid valve fluid inlet or parallel.
10. the guide electromagnetic valve as described in as arbitrary in claim 1-4, is characterized in that, the sectional area of the piston auxiliary section (518) of described piston element is described piston element for arranging more than 1.8 times of the sectional area at described sealed department position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010624738.7A CN102563089B (en) | 2010-12-25 | 2010-12-25 | Piloted solenoid valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010624738.7A CN102563089B (en) | 2010-12-25 | 2010-12-25 | Piloted solenoid valve |
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| CN102563089A CN102563089A (en) | 2012-07-11 |
| CN102563089B true CN102563089B (en) | 2015-06-10 |
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| CN201010624738.7A Active CN102563089B (en) | 2010-12-25 | 2010-12-25 | Piloted solenoid valve |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6505812B1 (en) * | 2000-11-17 | 2003-01-14 | Mks Instruments, Inc. | Solenoid valve |
| CN2559839Y (en) * | 2002-07-31 | 2003-07-09 | 李汉宝 | Piston guiding electromagnetic valve with high sealing performance |
| CN2753926Y (en) * | 2004-11-16 | 2006-01-25 | 浙江三花股份有限公司 | Large-diameter pilot electromagnetic valve |
| CN201100423Y (en) * | 2007-11-16 | 2008-08-13 | 浙江盾安人工环境设备股份有限公司 | Piston electromagnetic valve |
| CN201215210Y (en) * | 2008-04-28 | 2009-04-01 | 浙江新三荣制冷有限公司 | Piston type solenoid valve |
| CN201344266Y (en) * | 2009-03-15 | 2009-11-11 | 蒋可贞 | Piston type pilot-operated solenoid valve with large aperture |
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2010
- 2010-12-25 CN CN201010624738.7A patent/CN102563089B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6505812B1 (en) * | 2000-11-17 | 2003-01-14 | Mks Instruments, Inc. | Solenoid valve |
| CN2559839Y (en) * | 2002-07-31 | 2003-07-09 | 李汉宝 | Piston guiding electromagnetic valve with high sealing performance |
| CN2753926Y (en) * | 2004-11-16 | 2006-01-25 | 浙江三花股份有限公司 | Large-diameter pilot electromagnetic valve |
| CN201100423Y (en) * | 2007-11-16 | 2008-08-13 | 浙江盾安人工环境设备股份有限公司 | Piston electromagnetic valve |
| CN201215210Y (en) * | 2008-04-28 | 2009-04-01 | 浙江新三荣制冷有限公司 | Piston type solenoid valve |
| CN201344266Y (en) * | 2009-03-15 | 2009-11-11 | 蒋可贞 | Piston type pilot-operated solenoid valve with large aperture |
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| CN102563089A (en) | 2012-07-11 |
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