CN107956911A - A kind of solenoid valve - Google Patents
A kind of solenoid valve Download PDFInfo
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- CN107956911A CN107956911A CN201610895826.8A CN201610895826A CN107956911A CN 107956911 A CN107956911 A CN 107956911A CN 201610895826 A CN201610895826 A CN 201610895826A CN 107956911 A CN107956911 A CN 107956911A
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- valve
- cavity
- valve port
- protrusion
- assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a kind of solenoid valve, including pedestal, valve component, core assembly, the second core assembly；The solenoid valve further includes connection chamber, one orifice of the connection chamber and solenoid valve, second core assembly is provided with protrusion, the protruding part is set in the position of the relatively described connection chamber of second core assembly or the protrusion towards the connection chamber, and the protrusion is less than the connection chamber；In the one of which working status of the solenoid valve, the protruding part is predominantly located in the connection chamber in the connection chamber or the protrusion.The technical program can be applied to step-by-step solenoid valve or guide electromagnetic valve, by setting protrusion in core assembly, the pressure differential of electromagnetism valve events is suitably reduced.
Description
Technical Field
The invention relates to the technical field of fluid control, such as an electromagnetic valve for flow path control, in particular to a pilot-operated electromagnetic valve or a step-by-step electromagnetic valve.
Background
Some flow paths such as refrigeration cycle devices usually adopt solenoid valves as control parts for changing the conduction of refrigerant and other fluids, and some systems requiring larger flow capacity can use some pilot-operated solenoid valves or step-by-step solenoid valves, i.e. whether a smaller valve port or a pilot valve port is conducted or not is firstly conducted through electromagnetic force, then a relatively larger valve port, i.e. a main valve port is conducted or closed through pressure difference between an inlet and an outlet of the valve, so that how to ensure that the solenoid valve can normally work under the condition of relatively smaller pressure difference or ensure that the solenoid valve works under the condition of specific pressure difference, the pressure drop of a flow passage and the volume of a valve body can be basically kept unchanged, and the technical problem of the existing solenoid valves is improved.
Disclosure of Invention
The invention aims to provide an electromagnetic valve, which adopts the following technical scheme:
a solenoid valve comprises a seat body, a valve body assembly and an iron core assembly; the iron core assembly comprises a movable iron core and a first valve core, the iron core assembly is arranged in a cavity of the valve body assembly, and the movable iron core can move within a certain range of distance, namely a stroke, along the axial direction under the action of external force; the electromagnetic valve further comprises a second valve core assembly, the second valve core assembly comprises a second valve core assembly, the electromagnetic valve is provided with at least two interfaces, the two interfaces are respectively used as an inlet and an outlet of the electromagnetic valve, the electromagnetic valve further comprises a communication cavity, the communication cavity is communicated with one interface, the second valve core assembly is provided with a protruding portion and a valve hole, the protruding portion is located at a position of the second valve core assembly relative to the communication cavity, or the protruding portion is arranged towards the communication cavity, or the protruding portion partially extends into the communication cavity, and the protruding portion is smaller than the communication cavity; the valve hole is arranged in a penetrating manner, a part of the valve hole close to the protrusion part is positioned on the inner side of the protrusion part, and the valve hole faces the communication cavity or the valve hole is partially positioned in the communication cavity; in one of the operating states of the solenoid valve, the protrusion is located in the communication chamber or the protrusion is mostly located in the communication chamber.
The second valve core component may comprise a piston-like component, a valve port fitting; the valve port fitting piece is relatively fixed or limited with the piston-like piece through a limiting mechanism, and the protrusion part is fixedly arranged or relatively limited with the valve port fitting piece; the electromagnetic valve comprises a valve port part, the valve port fitting part is provided with a sealing fitting part which is matched and sealed with the valve port part to realize the opening or closing of the electromagnetic valve, the protrusion part is positioned on the inner side of the sealing fitting part, and the protrusion part is arranged in a protruding mode relative to the sealing fitting part; the valve hole is approximately opposite to the communication cavity.
The sealing matching part of the valve port matching piece is arranged opposite to the valve port part, the protrusion part is arranged opposite to the communication cavity or partially positioned in the communication cavity to define the protrusionThe part of the part close to the valve port fitting piece is a head end, the part of the protrusion part relatively far away from the valve port fitting piece is a tail end, the distance L0 between the tail end part of the protrusion part and the inner wall part of the communication cavity is more than or equal to the stroke h of the second valve core assembly, and the requirements are met: 4 × D1 × h < (D2) 2 -d2 2 )；
Wherein, D1: the diameter of the effective sealing part of the valve port part corresponding to the valve port fitting piece to realize the matching sealing part;
d2: the diameter or equivalent diameter of the communicating cavity:
d2: the diameter of the lower end of the protrusion or the diameter of the position, closest to the inner wall of the communication cavity, of the tail end of the protrusion;
l0: a horizontal distance between a distal end portion of the protrusion and an inner wall portion of the communication chamber or a minimum distance between the distal end portion of the protrusion and the inner wall portion of the communication chamber;
h: a stroke by which the second spool assembly is actuatable.
Defining the stroke of the movable iron core capable of moving axially as a first stroke, and defining the stroke of the second valve core assembly capable of acting as a second stroke h, wherein the second stroke h of the second valve core assembly is smaller than the first stroke of the movable iron core; and the effective length L of the axial direction of the protrusion part, namely the height L of the end part of the protrusion part from the axial direction of the valve port fitting piece can be more than or equal to the distance h of the valve port fitting piece from the axial direction of the valve port part, wherein L is more than or equal to h.
The second valve core component may comprise a piston-like component, a valve port fitting component, a limiting component, wherein the limiting component limits the valve port fitting component or fixes the valve port fitting component, the limiting component is fixed or limited through a bending part or a crimping part, and the protrusion comprises a limiting component or a part of a limiting component; the limiting part comprises an outward flow guide structure or a transition structure, the electromagnetic valve comprises a valve port part, and the valve port part is arranged opposite to the valve port matching part; the valve port part is in a smooth transition structure to the inner wall part of the communication cavity; the horizontal distance L1 between the tail end part A of the flow guide structure or the transition structure of the limiting part and the inner wall part of the communication cavity meets the following requirements:
wherein:
d2: the diameter or equivalent diameter of the communicating cavity:
l1: the horizontal distance between the tail end part A of the flow guide structure or the transition structure of the limiting part and the inner wall part of the communicating cavity;
l2: the horizontal distance between a sealing part C for matching and sealing the valve opening part and the inner wall part of the communication cavity;
h: a stroke by which the second spool assembly is actuatable.
The second valve core component can also comprise a piston-like component and a valve port fitting piece, the valve port fitting piece is fixed or limited with the piston-like component through a limiting mechanism, and the protrusion part comprises a part of the valve port fitting piece and a part of the limiting mechanism;
the electromagnetic valve comprises a valve port part which is arranged opposite to the valve port matching part; the valve port part and the inner wall part of the communication cavity are in a smooth transition structure;
the valve port fitting piece comprises a sealing fitting part and an outward flow guide structure or transition structure, and the sealing fitting part is matched and sealed with the valve port part to realize the opening or closing of the electromagnetic valve;
the horizontal distance L1 between the tail end part A of the flow guide structure or the transition structure of the valve port fitting piece and the inner wall part of the communication cavity meets the following requirements:
wherein:
d2: the diameter or equivalent diameter of the communication cavity:
l1: the horizontal distance between the tail end part A of the flow guide structure or the transition structure of the valve port fitting piece and the inner wall part of the communication cavity;
l2: the horizontal distance between a sealing part C for matching and sealing the valve opening part and the inner wall part of the communication cavity;
h: a stroke by which the second spool assembly is actuatable.
The flow guiding structure or transition structure of the limiting member or the valve port fitting mentioned in the present specification means that the external surface of the limiting member or the portion of the valve port fitting that may contact with the fluid is not provided with a step-like or acute angle-like structure, so that the fluid flow does not change sharply.
The second valve core assembly further comprises an elastic component, the elastic component comprises an elastic element and a split ring, the split ring comprises an opening part and at least one groove which is opened inwards, the split ring is provided with a relatively smooth outer wall part, and the elastic element is arranged in the groove of the split ring; the side of the second valve core component is also provided with an outward groove, and the elastic component is limited in the groove of the second valve core component.
The valve body assembly comprises a sleeve and a cover body which is used for being matched or fixed with the base body, the cover body and the sleeve are fixed through welding, the movable iron core is positioned in the sleeve, the movable iron core is in sliding fit with the inner wall part of the sleeve in the axial direction, and the valve body assembly and the base body are fixedly connected through threads or fixedly welded or fixedly clamped through a clamp spring; the cover body is provided with a cavity, the main body part of the second valve core assembly is positioned in the cavity of the cover body, the main body part of the second valve core assembly can slide in the cavity of the cover body under the action of external force, the second valve core assembly is smaller than the cavity of the cover body, and the elastic member is in contact or partial contact with the inner wall part of the cavity of the cover body. Where the second valve core component is smaller than the cavity of the cover means that the second valve core component is slightly smaller than the cavity and is free to slide axially within the cavity; and the elastic component is contacted with the inner wall part of the cavity, so that the second valve core component is positioned in the cavity and cannot fall off freely, namely, a certain friction force exists between the second valve core component and the inner wall of the cavity.
The second valve core assembly is provided with a first valve seat matched with a first valve core of the iron core component, the first valve seat is positioned on the opposite side of the protrusion part, the valve hole penetrates through the first valve seat and the protrusion part, and the first valve seat and the first valve core are arranged oppositely; the pedestal includes two interfaces: the seat body comprises a main valve cavity, and the main valve cavity is communicated with the second interface; in addition, the base body also comprises a main valve seat, and the main valve seat is provided with the valve port part; the axis of the communication cavity is parallel to or approximately coincident with the axis of the valve hole.
According to the technical scheme, the protrusion is arranged on the second valve core assembly, the protrusion extends into the communication cavity towards the communication cavity or partially extends into the communication cavity, the through valve hole is formed in the second valve core assembly, one part of the valve hole close to the protrusion is located on the inner side of the protrusion, so that the other side of the second valve core assembly can be communicated with the communication cavity through the valve hole, in the action process of the electromagnetic valve, the pressure of the cavity on the other side of the second valve core assembly is closer to the pressure of the interface communicated with the communication cavity, the pressure on one side of the second valve core assembly is relatively close to the pressure of the other interface, the pressure difference required by action is easily kept on two sides of the second valve core assembly, the electromagnetic valve can normally work under the condition of relatively small pressure difference or the electromagnetic valve works under the specific pressure difference, the pressure drop of a flow channel is limited to rise, and the volume of the valve body can be basically kept unchanged.
Drawings
FIG. 1 is a schematic cross-sectional view of a solenoid valve in an operating state according to an embodiment of the present invention.
Fig. 2 is a partially enlarged schematic view of the solenoid valve shown in fig. 1.
FIG. 3 is a schematic view of a second valve core component of the solenoid valve of FIG. 1.
FIG. 4 is a top schematic view of a second valve core component of the solenoid valve of FIG. 1.
Fig. 5 is a schematic perspective view of a piston-like member of the second valve core member of the solenoid valve of fig. 1.
Fig. 6 is a schematic view of a split ring of the resilient member of the solenoid valve shown in fig. 1.
Fig. 7 is a schematic view of another embodiment of a second valve core component.
Fig. 8 is a schematic cross-sectional view illustrating an operation state of another embodiment of the solenoid valve.
Fig. 9 is a partially enlarged schematic view of the solenoid valve shown in fig. 8.
FIG. 10 is a schematic view of a second spool assembly of the solenoid valve of FIG. 8.
FIG. 11 is a schematic view of yet another second spool assembly.
Fig. 12 is a schematic sectional view of the electromagnetic valve of the third embodiment when opened.
Detailed Description
The technical scheme can be applied to a normally open type solenoid valve, can also be a normally closed type solenoid valve, namely a solenoid valve which is opened when electrified, and can even be used for a switching type solenoid valve, namely a solenoid valve of which the second valve core component can act between two positions. The technical solution of the present invention will be described with reference to the accompanying drawings, in which fig. 1 is a schematic cross-sectional view of a solenoid valve provided in an embodiment of the present invention, when the solenoid valve of the present embodiment is opened, and communication is conducted between an inlet 22 and an outlet 23, fig. 2 is a partially enlarged schematic view of the solenoid valve shown in fig. 1, fig. 3 is a schematic view of a second valve core component, fig. 4 is a schematic top view of the second valve core component, fig. 5 is a schematic diagram of a piston-like member of the second valve core component, and fig. 6 is a schematic diagram of a split ring of an elastic member.
As shown, the solenoid valve includes a housing 20, a solenoid (not shown), a valve body assembly 40, a core assembly 10, and a second core assembly 30. The core assembly 10 includes a core 12 and a first valve element 14, which can move under the action of an external force, and may further include a limiting member for limiting the first valve element 14, and the core assembly 10 is located in the cavity of the valve body assembly 40, and the core 12 can move along the axial direction within a certain range of distance, i.e., within the stroke, under the action of the external force, so that the core assembly moves, and even if the first valve element also moves along with the core 12, the first valve port is opened or closed. In addition, the position of the iron core assembly can be oppositely arranged, namely, another iron core is arranged in the middle of the sleeve pipe like a fixed iron core and is fixedly arranged with the sleeve pipe, the movable iron core is relatively far away from one side of the first valve core and moves downwards during action to drive the valve core to move downwards, and the magnetic valve can be applied to other different occasions such as a normally-open type electromagnetic valve.
The valve body assembly 40 includes a first iron core 11, a sleeve 16, a cover 15 for fitting or fixing with the seat 20, and a sealing member, in this embodiment, the first iron core 11 is a fixed iron core; the cover body 15 is fixed to one end of the sleeve 16 by welding, the fixed iron core 11 is fixed to the other end of the sleeve 16 by welding, the valve body assembly 40 and the seat body 20 of the embodiment are fixed by threaded connection, sealing of a fixed portion is achieved by arranging a sealing element, and fixing or limiting of the valve body assembly 40 and the seat body can be achieved by a limiting piece. The iron core assembly 10 is arranged in the cavity of the valve body assembly 40, the electromagnetic valve is further provided with an elastic element 13, one end of the elastic element 13 is abutted to the first iron core 11, and the other end of the elastic element 13 is abutted to the iron core assembly 10, if the iron core assembly can be abutted to the movable iron core 12, the iron core assembly can also be abutted to the first valve core and the like. The solenoid can be sleeved on the sleeve.
The solenoid valve further includes a second valve core assembly 30, the second valve core assembly 30 includes an elastic component and a second valve core component, the elastic component includes an elastic element 35 having elasticity in the radial direction and a split ring 34, the split ring 34 has an opening portion 343 and a groove 342 and a relatively smooth outer wall portion 341, the split ring 34 can be made of a material having relatively good lubrication performance, for example, the material includes a lubricating material and a plastic material, and is formed by injection molding or other methods, the elastic element 35 is disposed in the groove 342, the elastic element 35 has a certain elastic force in the radial direction, and in this embodiment, the elastic element is an annular structure made of metal and having a gap; resilient member 35 is compressed and positioned in groove 342 such that resilient member 35, when expanded, engages groove 342 on the opposite inner side of split ring 34. The second spool assembly 30 or most of it, i.e. the main body, is disposed in the cavity of the cover of the spool assembly 40, and due to the opening 343, the outer diameter of the elastic member is slightly larger than or partially larger than the cavity of the cover of the spool assembly 40 in the free state, but the radial direction of the elastic member can be reduced within a certain range, so that the elastic member is placed in the cavity of the cover and contacts with the inner wall of the cavity.
The second valve core component of the present embodiment includes a piston-like member 31, a valve port fitting 32, a stopper 33; the position limiting element 33 is used for limiting the position of the piston-like element 31 by the position limiting portion 313, and the valve port fitting element 32 is relatively fixed or limited by the position limiting element 33, that is, the position limiting mechanism for fixing or limiting the valve port fitting element 32 in this embodiment includes the position limiting element and the position limiting portion 313, and in the specific assembly process, the valve port fitting element 32 and the position limiting element 33 can be sleeved on the corresponding position of the piston-like element 31, and then the end portion of the piston-like element 31 is bent or pressed or connected by pressure to deform the end portion and form the position limiting portion 313, so as to achieve the assembly of the three elements. The piston-like member 31 has a side portion 316 engaged with an inner wall of a cavity of a cover body of the valve body assembly 10, a first valve seat 311 engaged with the first valve core 14, the side portion 316 is slightly smaller than the inner wall of the cavity of the cover body 15, the piston-like member 31 has a valve hole 312 communicating upper and lower sides thereof, the side portion of the piston-like member 31 is further provided with a groove 314, the piston-like member 31 is provided with an annular structure 318 at a position relatively close to one side of the first valve core, and the piston-like member 31 is further provided with at least one notch portion at the annular structure 318 as shown as two notch portions 319; the resilient member may retain a groove 314 provided in the side of the piston-like member 31. The first valve seat 311 is disposed opposite to the first valve element or the core assembly, and the first valve port is not conducted when the first valve element abuts against the first valve seat, so that the valve hole 312 does not communicate the second cavity 152 of the second valve core assembly, which is relatively close to the core assembly, with the first cavity 151 of the second valve core assembly, which is opposite to the second cavity.
The base 20 includes two ports: a first port and a second port, in this embodiment, the second port is used as an inlet 22, the first port is used as an outlet 23, the seat body 20 further includes a communicating chamber 24 communicated with the outlet, and further includes a main valve chamber 210, in addition, the seat body 20 further includes a main valve seat 21, the main valve seat 21 is provided with a valve port 211, and a part of the valve body assembly is located in the main valve chamber; in this embodiment, the cover and the base are connected by a screw, the cover is located in the main valve cavity, or alternatively, a part of the cover is located in the main valve cavity, the second valve core assembly is located in the cavity of the cover and makes the second valve core assembly form a first cavity 151 and a second cavity 152 opposite to each other, although the first cavity 151 and the second cavity 152 may change with the change of the position of the second valve core assembly; the second spool assembly may be located in the main valve chamber and provided opposite the valve port, and may be operated in the chamber of the cover to bring the second spool assembly into contact with the valve port 211 or away from the valve port 211, thereby opening or closing the solenoid valve.
When the system does not need the electromagnetic valve to be opened, the electromagnetic valve is not powered on, the iron core assembly 10 moves downwards or the iron core assembly 10 is located at the lower limit position because of the elastic force of the elastic element 13 or the combination of the elastic force and the gravity and other resultant forces between the fixed iron core 11 and the iron core assembly 10, the first valve core 14 moves downwards along with the iron core assembly or is located below, so that the sealing part 1411 of the first valve core 14 is contacted with the first valve seat 311, and the valve port of the first valve seat 311 is not conducted, so that the second cavity 152 formed by the second valve core assembly 30 and the valve body assembly is basically not communicated with the first cavity 151 formed by the second valve core assembly 30 and the seat body and the valve body assembly through the valve port 312, the first cavity 151 is communicated with the second cavity 152 through the balance hole 317, the opening part 343 of the split ring 34 and the like, and the balance hole 317 is small and the assembled opening part 343 is narrow, so that the first cavity 151 and the second cavity 152 can be slowly balanced if there is a pressure difference; or when the valve hole 312 does not communicate the second chamber 152 of the second spool assembly on the side relatively close to the spool assembly with the first chamber 151 of the second spool assembly on the side opposite to the second chamber. When the core assembly moves downward, the second valve core assembly can move downward, i.e. toward the valve port 211, under the action of the elastic force transferred by the core assembly in combination with the resultant force such as gravity, until the valve port fitting 32 of the second valve core assembly 30 abuts against the valve port 211, specifically, the sealing fitting 321 of the valve port fitting 32 abuts against the valve port to close the electromagnetic valve, and the sealing fitting 321 of the valve port fitting 32 is lower than the lower end 315 of the piston-like member or the sealing fitting 321 of the valve port fitting 32 protrudes from the lower end 315 of the piston-like member; when the seal fitting portion 321 abuts against the valve port portion, the communication chamber 24 communicates with the valve hole 312, the communication chamber 24 communicates with the outlet 23, i.e., the first port, the main valve chamber 213 communicates with the inlet 22, i.e., the second port, and the second chamber 152 indirectly communicates with the inlet 22 through the balance hole 317 and the opening portion 34 of the split ring 34; however, the communication chamber 24 and the second chamber do not communicate with each other through the valve hole 312, and the balance hole 317 and the opening portion 343 of the split ring 34 are both provided on the opposite outer sides of the seal engagement portion, that is, the balance hole 317 and the opening portion 343 of the split ring 34 do not communicate with the communication chamber 24, so that the solenoid valve is closed. The valve port may be a part of the seat body, i.e., a structure integrated with the seat body, or may be combined with the seat body and fixed to the seat body.
If the system needs to open the electromagnetic valve, the electromagnetic valve is powered on, the iron core 12 is acted by the electromagnetic force, the iron core assembly 10 moves upwards, namely towards the fixed iron core 11 until the iron core assembly 10 is abutted against the fixed iron core 11 by overcoming the influence of the elastic force of the elastic element 13 between the fixed iron core 11 and the iron core assembly 10 or the combination of the elastic force and the gravity, the first valve core 14 moves upwards along with the iron core assembly 10 to make the sealing part 1411 of the first valve core 14 leave the first valve seat 311, the first valve seat 311 is not contacted with the first valve core any more, the first valve port is conducted, so that the second chamber 152 formed by the second spool assembly 30 and the valve body assembly communicates with the communication chamber 24 through the valve hole 312, since the main valve chamber 210 is in communication with the inlet 22, the pressure of the main valve chamber is close to or approximately equal to the pressure at the inlet 22, and the communication chamber 24 communicates with the outlet 23, so that the pressure in the second chamber 152 is relatively close to the pressure at the outlet 23, thus, under the condition that the pressure difference exists between the inlet and the outlet of the electromagnetic valve, the pressure of the part below the second valve core component, namely the main valve cavity 21, is greater than the pressure of the part above the second valve core component, namely the second cavity 152, the second valve core component moves upwards in the figure under the action of the pressure and overcomes the influence of resultant force of friction force, gravity and the like between the elastic component and the inner wall part of the seat body, thus, the second spool assembly 30 is separated from the valve port portion 211, and the main valve port is opened until the upper portion 318 of the piston-like member 31 of the second spool assembly 30, i.e., the two semi-annular structures of the present embodiment, come into contact with the top 153 of the cavity of the cover 15, at which time the valve port 312 communicates with the upper and lower sides of the second spool assembly, or the valve hole 312, connects the second chamber 152 with the communication chamber 24, and the outlet 23 of the solenoid valve is connected with the inlet 22 through the communication chamber 24, the space between the valve port portion 211 and the valve port fitting 32 of the second valve core assembly 30. At this time, the second chamber 152 of the second spool assembly and the first chamber 151 are also communicated through the balance hole 317, and the notched portion 319 of the piston-like member 31 enables the pressure balance between the inner and outer sides of the two semi-annular structures, and similarly, the open portion 343 of the split ring 34 enables the pressure balance between the upper and lower sides of the split ring.
In order to enable the solenoid valve to work under a relatively small pressure difference, or to enable the operation of the solenoid valve to be relatively stable and reliable, the second valve core assembly 30 of the solenoid valve of the present embodiment is provided with a protrusion 36 at a position opposite to the communication cavity 24, the protrusion 36 protrudes downward or outward relative to the valve port fitting 32, the protrusion is provided with or partially protrudes into the communication cavity 24 relative to the communication cavity, or the position of an end 310 of the protrusion 36 may be slightly lower than the valve port when the solenoid valve is opened, the effective length L of the protrusion 36 in the vertical direction, that is, the height L of the end 310 of the protrusion 36 from the vertical direction of the valve port fitting 32 may be greater than or equal to the distance h, L ≧ h, in the vertical direction of the valve port fitting 32, so that through the through valve hole 312, the end of the valve hole 312 disposed opposite to the communication cavity or the end of the valve hole close to the communication cavity is located in the communication cavity, the pressure at the valve hole 312 may be relatively closer to the pressure of the communication cavity; it is preferable that the effective length L of the protrusion 36 in the vertical direction, i.e., the height L of the end 310 of the protrusion 36 from the vertical direction of the valve port fitting 32, be greater than the distance h of the valve port fitting 32 from the vertical direction of the valve port. In this embodiment, the distance h in the vertical direction from the valve port fitting 32 to the valve port portion is also the active stroke of the second valve core assembly, and the active stroke h of the second valve core assembly is smaller than the stroke in which the core assembly can act. Defining: the diameter D1 of the valve port part, namely the diameter D1 of an effective sealing part of a part for realizing the matching sealing of the valve port part corresponding to a valve port matching piece, the diameter or equivalent diameter D2 of a vertical outlet section from the inside of the main valve port to the outlet direction, namely a communication cavity, the diameter D1 of the upper end of the protrusion part, namely the diameter D1 of the initial part of the protrusion part, and the diameter D2 of the lower end of the protrusion part, namely the diameter D2 of the position where the tail end of the protrusion part is closest to the inner wall of the communication cavity, and the horizontal distance L0 between the tail end of the protrusion part and the inner wall of the communication cavity satisfy the following conditions: d1<D1，d2&D1, L0 is more than or equal to h, and the horizontal distance L0 between the position of the tail end of the protrusion part, which is closest to the inner wall part of the communication cavity, and the inner wall part of the communication cavity is more than or equal to the stroke h of the second valve core assembly. Further, D1, D2, D1, and h may be the following: 4 d1 h < (D2) 2 -d2 2 ). Most of the outer surface of the protrusion is of a smooth transition structure, i.e., plays a role in guiding fluid, for example, the main body of the outer surface of the protrusion may be of an inverted truncated cone-shaped structure, or the cross section of the protrusion may include at least one arc, or the cross section of the protrusion may include at least one straight line, or the cross section of the protrusion may include a combined structure in which one arc is tangent to a straight line, or the cross section of the protrusion includes a combined structure in which more than two arcs are tangent to a straight line. As shown in fig. 2 and 3, the cross section of the protrusion includes at least one segment of circular arc, or the main body of the cross section of the protrusion is a circular arc structure, and the main body of the protrusion includes a flow guide structure 331 with smooth transition, so that the flow resistance of the fluid is relatively small and the fluid is less disturbed; as shown in fig. 7, the main body of the protruding portion of the stopper 33a may have a substantially truncated cone-shaped configuration, and the main body of the protruding portion may include a smooth linear transition structure 332, so that the stopper 33a is fixed or stopped by the bent portion 313. The protrusion in this specification refers to a portion of the second spool assembly that is located inside the seal engagement portion and protrudes outward from the seal engagement portion of the valve port fitting that is in engagement seal with the valve port portion, and includes a portion of the stopper member 33a and a portion of the piston-like member 31 as in this embodiment.
Next, another embodiment will be described, as shown in fig. 8 to 10, fig. 8 is a cross-sectional view of a solenoid valve of another embodiment in an open state, fig. 9 is a partially enlarged view of the solenoid valve shown in fig. 8, and fig. 10 is a view of a second spool assembly of the solenoid valve shown in fig. 8. In this embodiment, the side of the limiting member 33 facing outward, that is, the side that may contact with the fluid when the fluid flows, is a smooth transition structure, that is, the limiting member 33 has a flow guide portion 331, and correspondingly, the valve port portion 211 also has a smooth transition structure, and the transition structure smoothly transitions from the sealing portion C that is in sealing engagement with the sealing portion to the vertical inner wall portion B of the communicating cavity; defining: a diameter D1 of the valve port portion, i.e., a diameter D1 of an effective sealing portion of the valve port portion, which is matched with the valve port fitting member to realize a sealing, a diameter or an equivalent diameter D2 of a communication chamber, which is a vertical outlet section from the inside of the main valve port to the outlet direction, an upper end diameter D1 of the protrusion portion, i.e., a diameter D1 of a start portion of the protrusion portion, a lower end diameter D2 of the protrusion portion, i.e., a diameter D2 of a nearest part of an end portion of the protrusion portion from the inner wall of the communication chamber, an effective stroke h of the second valve core assembly, a horizontal distance L1 between an end portion a of the flow guide portion 331 and the inner wall of the communication chamber, a height h1 of a transition structure of the valve port portion 211, a horizontal distance L2 between a sealing portion C of the valve port portion, which is matched and sealed, and the inner wall of the communication chamber, an effective length L in a vertical direction of the protrusion portion 36, i.e., a height L between an end portion 310 of the valve port protrusion portion 36 and the vertical direction of the valve port fitting member 32, L1, and satisfying the following conditions:
the flow guiding part 331 is an arc-shaped structure, and the distance from the second valve core assembly to the valve port part is gradually increased from the sealing matching part of the valve port matching part to the tail end of the limiting part, so that the whole flow passage structure is relatively reasonable, and the resistance to the fluid is relatively small. Other configurations such as a linear configuration are also possible, as shown in FIG. 11. Other structures and working principles of the solenoid valve can refer to the above-described embodiment, which is a normally closed solenoid valve, and in addition, the technical scheme can also be applied to a normally open solenoid valve after being modified. The technical scheme can be used for a pilot-operated electromagnetic valve or a step-by-step electromagnetic valve. The change is relatively small, only the second valve core assembly, namely the main valve core is provided with the protruding part, so that the pressure on the upper side of the second valve core assembly is closer to the pressure of the communication cavity, namely the first interface side, and the pressure on the periphery of the lower side of the second valve core assembly is closer to the pressure of the second interface of the electromagnetic valve, so that the pressure difference on the upper side and the lower side of the second valve core assembly is closer to the pressure difference of the inlet and the outlet, the action pressure difference of the electromagnetic valve can be properly reduced, and compared with the traditional distributed electromagnetic valve or a pilot type electromagnetic valve, the action pressure difference of the electromagnetic valve is reduced by reducing the action height of the main valve, but the pressure drop of the flow channel is increased by reducing the action height of the main valve; and some methods of increasing the area of the sealing end surface reduce the action pressure difference of the electromagnetic valve, so that the volume of the electromagnetic valve is increased. The above-described embodiments employ a protrusion on the valve core assembly of the main valve, which has a small modification, and can relatively reduce the pressure difference of the normal operation of the solenoid valve, but basically does not increase the solenoid valve, and also keeps the pressure drop of the fluid passing through the solenoid valve basically unchanged.
In addition, the structure of the valve port fitting element in the above-described technical solution is relatively simple, but the valve port fitting element may have other structures, that is, the above-described limiting element is combined with the valve port fitting element, so that the number of parts can be reduced, as shown in the embodiment shown in fig. 12. The second valve core component may also comprise a piston-like component, a valve port fitting 32', the valve port fitting 32' being fixed or limited by the piston-like component without any further limitation as described above, and correspondingly the protrusion comprises a portion of the valve port fitting and a portion of the piston-like component; the valve port fitting is used for matching with the valve port part and is also used as a fluid guide. The valve port part and the inner wall part of the communication cavity are also in a smooth transition structure; the valve port fitting piece 32' comprises a sealing fitting part and a flow guide structure or a transition structure which is relatively positioned at the inner side of the sealing fitting part, and the sealing fitting part is matched and sealed with the valve port part to realize the opening or closing of the electromagnetic valve; the horizontal distance L1 between the tail end part A of the flow guide structure or the transition structure of the valve port fitting piece and the inner wall part of the communicating cavity meets the following requirements:
wherein:
d2: the diameter or equivalent diameter of the communication cavity:
l1: the horizontal distance between the tail end part A of the flow guide structure or the transition structure of the valve port fitting piece and the inner wall part of the communication cavity;
l2: the horizontal distance between a sealing part C for matching and sealing the valve opening part and the inner wall part of the communication cavity;
h: a stroke in which the second spool assembly is actuatable.
Other structures and operation principles of the present embodiment can be referred to the above-described embodiments, and will not be repeated here.
The technical solutions of the present invention are introduced in a specific implementation manner, and specific examples are applied herein to explain the working principle and the implementation manner, and the description of the implementation manner is only used to help understanding the method and the core idea of the technical solutions of the present invention. The upper and lower directions in the present specification are described based on the directions corresponding to the drawings, and should not be construed as limiting the corresponding technical aspects of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements, modifications, combinations or substitutions on the technical solution of the present invention without departing from the relevant principle, and these shall fall within the protection scope of the claims of the present invention.
Claims (10)
1. A solenoid valve comprises a seat body, a valve body assembly and an iron core assembly; the iron core assembly comprises a movable iron core and a first valve core, the iron core assembly is arranged in a cavity of the valve body assembly, and the movable iron core can act within a certain range of distance, namely stroke, along the axial direction under the action of external force; the electromagnetic valve further comprises a second valve core assembly, the second valve core assembly comprises a second valve core assembly, the electromagnetic valve is provided with at least two interfaces, the two interfaces are respectively used as an inlet and an outlet of the electromagnetic valve, the electromagnetic valve further comprises a communication cavity, the communication cavity is communicated with one interface, the second valve core assembly is provided with a protruding portion and a valve hole, the protruding portion is located at a position of the second valve core assembly relative to the communication cavity, or the protruding portion is arranged towards the communication cavity, or the protruding portion partially extends into the communication cavity, and the protruding portion is smaller than the communication cavity; the valve hole is arranged in a penetrating manner, a part of the valve hole close to the protrusion part is positioned on the inner side of the protrusion part, and the valve hole faces the communication cavity or the valve hole is partially positioned in the communication cavity; in one of the operating states of the solenoid valve, the protrusion is located in the communication chamber or the protrusion is mostly located in the communication chamber.
2. The solenoid valve as claimed in claim 1 wherein said second spool component comprises a piston-like member, a valve port fitting; the valve port fitting piece is relatively fixed or limited with the piston-like piece through a limiting mechanism, and the protrusion part is fixedly arranged or relatively limited with the valve port fitting piece; the electromagnetic valve comprises a valve port part, the valve port fitting part is provided with a sealing fitting part which is matched and sealed with the valve port part to realize the opening or closing of the electromagnetic valve, the protrusion part is positioned on the inner side of the sealing fitting part, and the protrusion part is arranged in a protruding mode relative to the sealing fitting part; the valve hole is approximately opposite to the communication cavity.
3. The electromagnetic valve according to claim 2, wherein the sealing engagement portion of the valve port engagement element is disposed opposite to the valve port portion, the protrusion portion is disposed opposite to or partially located in the communication cavity, a portion of the protrusion portion close to the valve port engagement element is defined as a head end, a portion of the protrusion portion away from the valve port engagement element is defined as a tail end, a distance L0 between the tail end of the protrusion portion and an inner wall portion of the communication cavity is greater than or equal to a stroke h of the second valve core assembly, and the following requirements are satisfied: 4 d1 h < (D2) 2 -d2 2 )；
D1: the diameter of the effective sealing part of the valve port part corresponding to the valve port fitting piece to realize the matching sealing part;
d2: the diameter or equivalent diameter of the communicating cavity:
d2: the diameter of the lower end of the protrusion or the diameter of the position, closest to the inner wall of the communication cavity, of the tail end of the protrusion;
l0: the horizontal distance between the tail end part of the protrusion part and the inner wall part of the communication cavity or the minimum distance between the tail end part of the protrusion part and the inner wall part of the communication cavity;
h: a stroke by which the second spool assembly is actuatable.
4. The electromagnetic valve according to claim 2 or 3, characterized in that the stroke in which the movable core can move axially is defined as a first stroke, and the stroke in which the second spool assembly can act is defined as a second stroke h, and the second stroke h of the second spool assembly is smaller than the first stroke of the movable core; and the effective length L of the axial direction of the protrusion part, namely the height L of the end part of the protrusion part from the axial direction of the valve port fitting piece is more than or equal to the distance h of the valve port fitting piece from the axial direction of the valve port part, wherein L is more than or equal to h.
5. The solenoid valve according to any one of claims 1 to 4, wherein the second valve core component comprises a piston-like component, a valve port fitting component, a stopper that restricts or fixes the valve port fitting component, the stopper is fixed or stopped by a bent portion or a press portion, and the protrusion comprises or comprises a part of the stopper; the limiting piece comprises an outward flow guide structure or a transition structure, the electromagnetic valve comprises a valve port part, and the valve port part is arranged opposite to the valve port matching piece; the valve port part and the inner wall part of the communication cavity are in a smooth transition structure; the horizontal distance L1 between the tail end part A of the flow guide structure or the transition structure of the limiting part and the inner wall part of the communicating cavity meets the following requirements:
wherein:
d2: the diameter or equivalent diameter of the communication cavity:
l1: the horizontal distance between the tail end part A of the flow guide structure or the transition structure of the limiting part and the inner wall part of the communicating cavity;
l2: the horizontal distance between a sealing part C for matching and sealing the valve opening part and the inner wall part of the communication cavity;
h: a stroke by which the second spool assembly is actuatable.
6. The solenoid valve according to any of claims 1-4, wherein the second valve core component comprises a piston-like member, a valve port fitting member, the valve port fitting member being fixed or retained with the piston-like member by a retaining mechanism, the protrusion comprising a portion of the valve port fitting member and a portion of the retaining mechanism;
the electromagnetic valve comprises a valve port part which is arranged opposite to the valve port matching part; the valve port part and the inner wall part of the communication cavity are in a smooth transition structure;
the valve port fitting piece comprises a sealing fitting part and an outward flow guide structure or transition structure, and the sealing fitting part is matched and sealed with the valve port part to realize the opening or closing of the electromagnetic valve;
the horizontal distance L1 between the tail end part A of the flow guide structure or the transition structure of the valve port fitting piece and the inner wall part of the communication cavity meets the following requirements:
wherein:
d2: the diameter or equivalent diameter of the communication cavity:
l1: the horizontal distance between the tail end part A of the flow guide structure or the transition structure of the valve port fitting piece and the inner wall part of the communication cavity;
l2: the horizontal distance between a sealing part C for matching and sealing the valve opening part and the inner wall part of the communication cavity;
h: a stroke in which the second spool assembly is actuatable.
7. The solenoid valve according to claim 5 or 6, wherein the second spool assembly has a relatively smooth flow guiding structure, and the distance from the sealing engagement portion of the valve port fitting to the end of the retainer is gradually increased.
8. The solenoid valve according to any of the preceding claims, wherein the second spool assembly further comprises a resilient member comprising a resilient element and a split ring, the split ring comprising an open portion and at least one inwardly opening groove, the split ring having a relatively smooth outer wall portion, the resilient element being disposed in the split ring groove; the side of the second valve core component is also provided with an outward groove, and the elastic component is limited in the groove of the second valve core component.
9. The electromagnetic valve according to claim 8, wherein the valve body assembly comprises a sleeve and a cover body for fitting or fixing with the seat body, the cover body and the sleeve are fixed by welding, the movable iron core is located in the sleeve, the movable iron core is in sliding fit with the inner wall of the sleeve in the axial direction, and the valve body assembly and the seat body are fixed by threaded connection or by welding or by being clamped and fixed by a snap spring; the cover body is provided with a cavity, the main body part of the second valve core assembly is positioned in the cavity of the cover body, the main body part of the second valve core assembly can slide in the cavity of the cover body under the action of external force, the second valve core assembly is smaller than the cavity of the cover body, and the elastic member is in contact or partial contact with the inner wall part of the cavity of the cover body.
10. The electromagnetic valve according to any one of claims 1 to 7, wherein the second spool assembly is provided with a first valve seat that engages with the first spool of the core member, the first valve seat being located on the opposite side of the protrusion, the valve hole passing through the first valve seat and the protrusion, the first valve seat being disposed opposite to the first spool; the pedestal includes two interfaces: the first interface is communicated with the communicating cavity, the seat body comprises a main valve cavity, and the main valve cavity is communicated with the second interface; in addition, the seat body also comprises a main valve seat, and the main valve seat is provided with the valve port part; the axis of the communication cavity is parallel to or approximately coincident with the axis of the valve hole.
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| CN201610895826.8A CN107956911B (en) | 2016-10-14 | 2016-10-14 | A kind of solenoid valve |
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| CN201610895826.8A CN107956911B (en) | 2016-10-14 | 2016-10-14 | A kind of solenoid valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735928A (en) * | 2018-07-18 | 2020-01-31 | 浙江三花制冷集团有限公司 | pilot-operated solenoid valve |
| CN110966414A (en) * | 2018-09-29 | 2020-04-07 | 杭州三花研究院有限公司 | Electrically operated valve and thermal management assembly |
| CN111120667A (en) * | 2018-10-30 | 2020-05-08 | 杭州三花研究院有限公司 | Electromagnetic valve |
| CN111734876A (en) * | 2020-08-19 | 2020-10-02 | 广东三方利精密技术有限公司 | Pilot-operated high-pressure electromagnetic valve |
| EP4112984A1 (en) | 2021-06-30 | 2023-01-04 | Danfoss A/S | Pilot controlled solenoid valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202182240U (en) * | 2011-09-07 | 2012-04-04 | 浙江中宝自控元件有限公司 | Electromagnetic valve |
| CN202252253U (en) * | 2011-08-29 | 2012-05-30 | 宁波开灵气动元件制造有限公司 | Large-caliber direct-acting piston type electromagnetic valve |
| JP2012154381A (en) * | 2011-01-25 | 2012-08-16 | Saginomiya Seisakusho Inc | Electromagnetic valve and pilot type electromagnetic valve |
| CN202451850U (en) * | 2012-02-16 | 2012-09-26 | 北京兰天达汽车清洁燃料技术有限公司 | Novel high-pressure electromagnetic valve |
| CN202901303U (en) * | 2012-10-30 | 2013-04-24 | 宁波开灵气动元件制造有限公司 | Superhigh temperature magnetic valve |
| CN204437420U (en) * | 2015-01-13 | 2015-07-01 | 浙江春晖智能控制股份有限公司 | A kind of flow proportional solenoid valve of piston valve mouth structure |
| EP3018434A1 (en) * | 2014-11-06 | 2016-05-11 | TGK CO., Ltd. | Electromagnetic valve |
-
2016
- 2016-10-14 CN CN201610895826.8A patent/CN107956911B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012154381A (en) * | 2011-01-25 | 2012-08-16 | Saginomiya Seisakusho Inc | Electromagnetic valve and pilot type electromagnetic valve |
| CN202252253U (en) * | 2011-08-29 | 2012-05-30 | 宁波开灵气动元件制造有限公司 | Large-caliber direct-acting piston type electromagnetic valve |
| CN202182240U (en) * | 2011-09-07 | 2012-04-04 | 浙江中宝自控元件有限公司 | Electromagnetic valve |
| CN202451850U (en) * | 2012-02-16 | 2012-09-26 | 北京兰天达汽车清洁燃料技术有限公司 | Novel high-pressure electromagnetic valve |
| CN202901303U (en) * | 2012-10-30 | 2013-04-24 | 宁波开灵气动元件制造有限公司 | Superhigh temperature magnetic valve |
| EP3018434A1 (en) * | 2014-11-06 | 2016-05-11 | TGK CO., Ltd. | Electromagnetic valve |
| CN204437420U (en) * | 2015-01-13 | 2015-07-01 | 浙江春晖智能控制股份有限公司 | A kind of flow proportional solenoid valve of piston valve mouth structure |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735928A (en) * | 2018-07-18 | 2020-01-31 | 浙江三花制冷集团有限公司 | pilot-operated solenoid valve |
| CN110735928B (en) * | 2018-07-18 | 2022-02-18 | 浙江三花制冷集团有限公司 | Pilot-operated type electromagnetic valve |
| CN110966414A (en) * | 2018-09-29 | 2020-04-07 | 杭州三花研究院有限公司 | Electrically operated valve and thermal management assembly |
| CN111120667A (en) * | 2018-10-30 | 2020-05-08 | 杭州三花研究院有限公司 | Electromagnetic valve |
| CN111120667B (en) * | 2018-10-30 | 2021-10-22 | 浙江三花智能控制股份有限公司 | Electromagnetic valve |
| CN111734876A (en) * | 2020-08-19 | 2020-10-02 | 广东三方利精密技术有限公司 | Pilot-operated high-pressure electromagnetic valve |
| CN111734876B (en) * | 2020-08-19 | 2020-12-22 | 广东三方利精密技术有限公司 | Pilot-operated high-pressure electromagnetic valve |
| EP4112984A1 (en) | 2021-06-30 | 2023-01-04 | Danfoss A/S | Pilot controlled solenoid valve |
| WO2023275289A1 (en) | 2021-06-30 | 2023-01-05 | Danfoss A/S | Pilot controlled solenoid valve |
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| CN107956911B (en) | 2019-10-15 |
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Effective date of registration: 20201126 Address after: 312500 Technology Center building of Sanhua Industrial Park, Meizhu Town, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: ZHEJIANG SANHUA INTELLIGENT CONTROLS Co.,Ltd. Address before: 310018 No. 289-2, No. 12, Hangzhou economic and Technological Development Zone, Zhejiang Patentee before: Hangzhou Sanhua Research Institute Co.,Ltd. |
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