CN114838187B - Electric valve - Google Patents

Electric valve Download PDF

Info

Publication number
CN114838187B
CN114838187B CN202111307370.6A CN202111307370A CN114838187B CN 114838187 B CN114838187 B CN 114838187B CN 202111307370 A CN202111307370 A CN 202111307370A CN 114838187 B CN114838187 B CN 114838187B
Authority
CN
China
Prior art keywords
valve
abutting
abutment
abutting portion
valve shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111307370.6A
Other languages
Chinese (zh)
Other versions
CN114838187A (en
Inventor
请求不公布姓名
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sanhua Intelligent Controls Co Ltd
Original Assignee
Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sanhua Intelligent Controls Co Ltd filed Critical Zhejiang Sanhua Intelligent Controls Co Ltd
Priority to PCT/CN2022/074247 priority Critical patent/WO2022161429A1/en
Publication of CN114838187A publication Critical patent/CN114838187A/en
Application granted granted Critical
Publication of CN114838187B publication Critical patent/CN114838187B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
    • F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)
  • Magnetically Actuated Valves (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

An electric valve comprises a valve seat component and a valve core rotor component; the valve core rotor assembly comprises a valve shaft assembly, a valve core component, a first elastic piece, a second elastic piece, an abutting component and a push rod; the valve shaft assembly comprises a valve shaft abutting part and a spring abutting part; the first valve element abutment portion of the valve element member is capable of abutting against the valve shaft abutment portion; the ejector rod comprises an ejector rod main body part and an ejector rod abutting part, and part of the ejector rod main body part extends out of a through hole at the upper end of the valve shaft assembly; the upper end part of the first elastic piece is abutted against the spring abutting part, the lower end part of the first elastic piece is abutted against the first abutting part, the second abutting part can be abutted against the second valve core abutting part, and the third abutting part can be abutted against the valve shaft assembly; the first elastic piece is sleeved outside the second elastic piece, the upper end of the second elastic piece is propped against the ejector rod propping part, the ejector rod propping part can be propped against the spring propping part, the propping part comprises a propping part hole part, and the lower end of the second elastic piece is propped against the third valve core propping part of the valve core part through the propping part hole part.

Description

Electric valve
[ field of technology ]
The invention relates to the technical field of refrigeration control, in particular to an electric valve.
[ background Art ]
Referring to fig. 19, cn109723884a discloses an electric valve having a guide bush 20, a valve shaft holder 30, a fixed male screw portion 23 provided on the guide bush 20, and a movable female screw portion 33 provided on the valve shaft holder 30, the fixed male screw portion 23 and the movable female screw portion 33 constituting a screw feed mechanism 28 of the electric valve.
The valve shaft 10 of the electric valve is provided with a fixing member 70, a restoring spring 75 is provided on the outer side of the fixing member 70, and the restoring spring 75 is positioned above the axial direction of the compression coil spring 60, with a disk-shaped pressing plate 61 disposed on the lower surface side of the top portion 32 of the valve shaft holder 30 interposed therebetween, between a stepped surface 13 formed between the upper small diameter portion 11 and the lower large diameter portion 12 of the valve shaft 10 and the lower surface of the top portion 32 of the valve shaft holder 30, and is compressed and disposed so as to be externally inserted into the upper small diameter portion 11 of the valve shaft 10.
[ invention ]
The invention aims to provide an electric valve, which comprises a valve body, a valve core rotor assembly and a shell, wherein the valve body comprises a valve seat part, a valve core rotor assembly and a shell;
the valve seat member includes a nut including an internal threaded portion; the valve seat component is fixedly connected with the shell;
The valve core rotor assembly comprises a valve shaft assembly, a valve core component, a first elastic piece, a second elastic piece, an abutting component and a push rod;
the valve shaft assembly comprises a valve shaft abutting part, an external thread part and a spring abutting part, wherein the external thread part can be in threaded fit with the internal thread part;
the valve core component comprises a first valve core abutting part, and the first valve core abutting part can abut against the valve shaft abutting part;
the ejector rod comprises an ejector rod main body part and an ejector rod abutting part, wherein part of the ejector rod main body part extends out of a through hole at the upper end of the valve shaft assembly, and the ejector rod main body part can abut against the shell;
the upper end of the first elastic piece abuts against the spring abutting portion, the abutting component comprises a first abutting portion, the lower end of the first elastic piece abuts against the first abutting portion, the abutting component comprises a second abutting portion, the valve core component comprises a second valve core abutting portion, the second abutting portion can abut against the second valve core abutting portion, the abutting component comprises a third abutting portion, and the third abutting portion can abut against the valve shaft assembly;
the first elastic piece is sleeved outside the second elastic piece, the upper end of the second elastic piece abuts against the ejector rod abutting portion, the ejector rod abutting portion can abut against the spring abutting portion, the abutting component comprises an abutting component hole portion, the valve core component comprises a third valve core abutting portion, and the lower end of the second elastic piece abuts against the third valve core abutting portion through the abutting component hole portion.
The electronic expansion valve that this application provided, first elastic component overcoat in the second elastic component can reduce the high size of motorised valve, is favorable to practicing thrift the installation space of motorised valve in relevant equipment.
[ description of the drawings ]
FIG. 1 is a cross-sectional view of an electrically operated valve of the present invention in a fully closed state;
FIG. 2 is a schematic view of the structure of the valve seat member of the electric valve of the present invention;
FIG. 3 is a schematic view of the rotor components and a partial enlarged view thereof of the electrically operated valve of the present invention in a fully closed state;
FIG. 4 is a cross-sectional view of the valve body and a partial enlarged view thereof from the time the electric valve of the present invention is opened to the time the spool just does not bear the elastic force of the first elastic member;
FIG. 5 is a cross-sectional view of the valve body of the electric valve of the present invention, with the head of the valve body just out of contact with the valve port, and an enlarged view of a portion thereof;
FIG. 6 is a cross-sectional view of the valve body of the electric valve of the present invention when opened to a maximum opening degree, and a partially enlarged view thereof;
FIG. 7 is a cross-sectional view of the valve body and a partial enlarged view thereof, from the time of excessive opening of the electric valve to the time of unscrewing of the screw pair of the present invention;
fig. 8 is a cross-sectional view of a valve body when the second embodiment of the electric valve of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof;
fig. 9 is a cross-sectional view of a valve body when the third embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partially enlarged view thereof;
Fig. 10 is a cross-sectional view of a valve body when a fourth embodiment of an electrically operated valve of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof;
fig. 11 is a sectional view of a valve body when the fifth embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partial enlarged view thereof;
fig. 12 is a cross-sectional view of a valve body when a sixth embodiment of an electrically operated valve of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof;
fig. 13 is a cross-sectional view of a valve body and a partially enlarged view thereof when an electrically operated valve according to a seventh embodiment of the present invention is in a fully closed state.
Fig. 14 is a cross-sectional view of a valve body and a partially enlarged view thereof when an electrically operated valve according to an eighth embodiment of the present invention is in a fully closed state.
Fig. 15 is a cross-sectional view of a valve body of a ninth embodiment of an electric valve according to the present invention when the electric valve is opened to a maximum opening degree, and a partially enlarged view thereof.
Fig. 16 is a cross-sectional view of a valve body of an electrically operated valve according to a tenth embodiment of the electrically operated valve of the present invention in a fully closed state, and a partially enlarged view thereof.
Fig. 17 is a cross-sectional view of a valve body when an electrically operated valve of an eleventh embodiment of the electrically operated valve of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof.
Fig. 18 is a cross-sectional view of a valve body of an electrically operated valve according to a twelfth embodiment of the present invention, and a partially enlarged view thereof, when the electrically operated valve is opened to a maximum opening degree;
FIG. 19 is a cross-sectional view of an electrically operated valve of the prior art;
wherein fig. 1-18 include the following reference numerals:
10a valve seat member; 101 a valve seat; 102, a nut; 103 a first connection pipe section; 104 a second nozzle portion; 10a valve port; 10b an internal thread; 10c fixing a stop; 10d a first access passage; 10e second access channel; a 20 spool rotor assembly; 201a valve shaft assembly; 2011 valve shaft; 2012 bushings; 20121 liner aperture portion; 2013 valve shaft body portion; 2014 a barrel; 20141 barrel abutment; 201411 a tubular element through-hole portion; 2015 valve shaft inner wall portion; 20151 first valve shaft inner wall portion; 20152 step; 20153 second valve shaft inner wall portion; 20154 valve shaft abutment; 20155 third valve shaft inner wall portion; 2016 outer edge portion; 20161 a first outer edge portion; 20162 a second peripheral portion; 201a an external thread portion; 201b movable stopper; 201c a rotor fixing portion; 202a valve element component; 2021 spool body; 2022 spool sleeve; 20221 spool sleeve hole portion; 202a valve core head; 202b a first spool abutment; 202c a second spool abutment; 202d a third valve element abutment; 202e a steel ball accommodating part; 2024 steel balls; 203 a rotor; 204 a second elastic member; 205 ejector pins; 2051 ejector pin body portion; 2052 ejector pin abutment; 206 an abutment member; 206a first abutment; 206b a second abutment; 206c a third abutment; 2061 a gasket member; 20611 washer hole portions; 2062 abutting a shelf; 20621 against the top of the rack; 20622 against the side of the shelf; 20623 abutting the shelf hole portion; a carrier 207;208 a first resilient member; 20a spring abutment; 30 shells; 40 coils.
[ detailed description ] of the invention
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 7, fig. 1 is a cross-sectional view of the electric valve of the present invention in a fully closed state; FIG. 2 is a schematic view of the structure of the valve seat member of the electric valve of the present invention; FIG. 3 is a schematic view of the rotor components and a partial enlarged view thereof of the electrically operated valve of the present invention in a fully closed state; FIG. 4 is a cross-sectional view of the valve body and a partial enlarged view thereof when the electric valve of the present invention is opened to a state where the valve body just does not bear the elastic force of the first elastic member; FIG. 5 is a cross-sectional view of the valve body of the electric valve of the present invention, with the head of the valve body just out of contact with the valve port, and an enlarged view of a portion thereof; FIG. 6 is a cross-sectional view of the valve body of the electric valve of the present invention when opened to a maximum opening degree, and a partially enlarged view thereof; FIG. 7 is a cross-sectional view of the valve body and a partial enlarged view thereof, from the time of excessive opening of the electric valve to the time of unscrewing of the screw pair of the present invention;
referring specifically to fig. 1 to 3, in one embodiment, the electric valve provided by the present invention includes a valve body and a coil 40, wherein the coil 40 is sleeved on the valve body, and the valve body includes a valve core rotor assembly 20 (shown in fig. 3), a valve seat component 10 (shown in fig. 2), and a housing 30 (shown in fig. 1). The coil 40 of the electric valve is connected to a drive controller, and after the drive controller is energized, a pulse drive signal is sent to the coil 40, and the coil 40 generates a varying magnetic field, so as to drive the valve core rotor assembly 20 of the electric valve to rotate in the forward or reverse direction.
One end of the housing 30 is open, the housing 30 is a thin-walled member, and the lower open side of the housing 30 is hermetically welded to the valve seat member 10, thereby forming a receiving chamber for receiving an upper half of the nut 102 (to be described later) and a main body portion of the valve core rotor assembly 20 (to be described later).
Referring to fig. 3, the spool rotor assembly 20 includes a valve shaft assembly 201, and in this embodiment, the valve shaft assembly 201 includes a valve shaft 2011 and a bush 2012, and the bush 2012 is fixed to a substantially upper end position of the valve shaft 2011, and the bush 2012 includes a bush hole portion 20121 penetrating upper and lower surfaces thereof. The valve shaft 2011 is provided with an external thread portion 201a.
Referring to fig. 2, the valve seat member 10 includes a nut 102, an internal thread portion 10b is disposed at an inner hole portion of the nut 102, and a valve shaft 2011 is in threaded engagement with the nut 102, so that the valve shaft 2011 can displace in an axial direction while the valve core rotor assembly 20 rotates, thereby driving the valve core member 202 to realize opening and closing actions of the valve port 10 a.
Referring to fig. 1 and 2, the valve seat member 10 has a valve port 10a, and a first inlet/outlet passage 10d and a second inlet/outlet passage 10e, the valve port 10a being communicable with the first inlet/outlet passage 10d and the second inlet/outlet passage 10e to allow a fluid medium (for example, a refrigerant) to pass therethrough, a through hole penetrating up and down is provided at a substantially central position of the valve seat member 10, an internal thread portion 10b (also referred to as a fixed thread portion) is provided on an inner wall of the through hole, and the internal thread portion 10b and an external thread portion 201a (also referred to as a movable thread portion) provided at a substantially lower position of the valve shaft 2011 are combined to constitute a screw feed mechanism (screw pair) of the present electric valve.
In this embodiment, the valve seat member 10 includes a nut 102, the nut 102 is provided with a through hole, an internal thread portion 10b is provided on an inner wall of the through hole of the nut 102, the valve seat member 10 further includes a valve seat 101, a portion of the nut 102 is located in the valve seat 101, and the nut 102 is fixedly connected with the valve seat 101 (for example, a mode of integrally injection molding a connecting body as an insert with the nut 102, and then welding or press-fitting the connecting body with the valve seat 101, or a mode of directly press-fitting the nut 102 with the valve seat 101, or the like, in this embodiment, the fixed connection between the nut 102 and the valve seat 101 is realized by integrally injection molding the connecting body as an insert with the nut 102, and the welding and fixing the connecting body with the valve seat 101), and the valve seat 101 is integrally molded with a valve port 10a (of course, a mode of forming the valve port 10a in other components, and then fixedly connecting the component with the valve seat 101 may be adopted).
In the present embodiment, the first connection pipe 103 and the second connection pipe 104 are welded to the valve seat 101, but the first connection pipe 103 and the second connection pipe 104 may be directly provided to the valve seat 101 by a flow path through which the refrigerant fluid passes, or the first connection pipe 103 or the second connection pipe 104 may be flange-sealed, for example, when the electric valve is applied to a vehicle air conditioner, a heat pump, or the like, where quick maintenance is required. The first connection part 103 and the second connection part 104 are provided in the present embodiment by means of an electrically operated valve for illustration.
Referring to fig. 2, in combination with fig. 1, the nut 102 protrudes from the annular base body and is provided with a fixed stop portion 10c, which cooperates with a movable stop portion 201b provided on the valve core rotor assembly 20 to form a stop mechanism at the lower end of the stroke of the present electric valve, that is, when the valve core rotor assembly 20 moves downward to a certain extent relative to the valve seat member 10, the movable stop portion 201b can abut against the fixed stop portion 10c to limit the rotation of the valve core rotor assembly 20 relative to the valve seat member 10, thereby limiting the continued downward movement of the valve core rotor assembly 20 in the axial direction, and thus controlling the stroke of the downward movement of the valve core rotor assembly 20.
Referring to fig. 3, the valve core rotor assembly 20 further includes a rotor 203 and a valve core member 202, the rotor 203 has a magnetic pole in a circumferential direction, the valve core member 202 is disposed through a central through hole of the valve shaft 2011, in addition, the valve core rotor assembly 20 further includes a first elastic member 208 and a second elastic member 204 disposed in the central through hole of the valve shaft 2011, the first elastic member 208 is sleeved on the second elastic member 204, and a push rod 205 is disposed at an upper end of the second elastic member 204.
The ejector 205 includes an ejector main body portion 2051 and an ejector abutment portion 2052, and the ejector abutment portion 2052 is formed so as to extend substantially in the circumferential direction of the ejector main body portion 2051. The ejector pin abutment portion 2052 is located below the bush 2012, and a portion of the ejector pin main body portion 2051 is penetrated out of the bush hole portion 20121, which can abut against the housing 30. The ejector pin abutment 2052 is located at the inner edge of the first elastic member 208, and the upper end portion of the first elastic member 208 abuts against the bush 2012, and the elastic load thereof does not act on the ejector pin 205 at all times.
The lower end of the first elastic member 208 abuts against an abutment member 206 (to be mentioned later), and the upper end of the first elastic member 208 abuts against the bush 2012. The lower end of the second elastic member 204 abuts against the spool member 202, and the upper end of the second elastic member 204 abuts against the jack abutment portion 2052 of the jack 205.
Referring to fig. 3, the electric valve provided in this embodiment includes a spring abutment portion 20a, where the spring abutment portion 20a is approximately a portion of the valve shaft assembly 201 abutting against the upper end portion of the first elastic member 208 and the upper end portion of the second elastic member 204 (including directly abutting against or indirectly abutting against, in this embodiment, the first elastic member 208 directly abuts against the bushing 2012, and the second elastic member 204 indirectly abuts against the bushing 2012 by the ejector rod abutment portion 2052), the elastic load of the first elastic member 208 and the second elastic member 204 can be directly or indirectly transferred to the bushing 2012, the bushing 2012 receives the elastic load of the first elastic member 208 and the second elastic member 204, and the valve shaft assembly 201 abuts against the first elastic member 208 and the second elastic member 204, and in this embodiment, the bushing 2012 includes the spring abutment portion 20a.
Referring to fig. 3, in the present embodiment, the valve shaft 2011 includes a hole penetrating up and down, the inner wall of the through hole forms a valve shaft inner wall portion 2015, the inner diameter of the valve shaft inner wall portion 2015 is not the same in the axial direction of the valve shaft 2011, specifically, the valve shaft inner wall portion 2015 includes a first valve shaft inner wall portion 20151, a stepped portion 20152, a second valve shaft inner wall portion 20153, a valve shaft abutment portion 20154, and a third valve shaft inner wall portion 20155, the first valve shaft inner wall portion 20151 is located above the second valve shaft inner wall portion 20153, the second valve shaft inner wall portion 20153 is located above the third valve shaft inner wall portion 20155 in the axial direction of the valve shaft 2011, and in the plane in which the cross section of the valve shaft 2011 is located, the orthographic projection of the first valve shaft inner wall portion 20151 along the plane (the orthographic projection is a closed line or annulus) is located outside the orthographic projection of the second valve shaft inner wall portion 20153 along the plane (the orthographic projection is the closed line or annulus), the orthographic projection of the second valve shaft inner wall portion 20153 along the plane (the orthographic projection is a closed line or a torus) is located outside the orthographic projection of the third valve shaft inner wall portion 20155 along the plane (the orthographic projection is a closed line or a torus), and generally, for the convenience of processing and manufacturing, the cross sections of the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153, and the third valve shaft inner wall portion 20155 are all circular, and at this time, the diameter of the first valve shaft inner wall portion 20151 is larger than the diameter of the second valve shaft inner wall portion 20153, and the diameter of the second valve shaft inner wall portion 20153 is larger than the diameter of the third valve shaft inner wall portion 20155, and in this embodiment, the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153, and the third valve shaft inner wall portion 20155 are all of equal diameter in the height direction, and therefore the first valve shaft inner wall portion 20151, the orthographic projection of the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155 along a plane in which the cross section of the valve shaft 2011 is located is a circle.
Further, the stepped portion 20152 and the valve shaft abutting portion 20154 have an extending distance in the horizontal direction, and in the axial direction of the valve shaft 2011, the stepped portion 20152 is located above the valve shaft abutting portion 20154, the outer edge of the stepped portion 20152 intersects the first valve shaft inner wall portion 20151, the inner edge intersects the second valve shaft inner wall portion 20153, the outer edge of the valve shaft abutting portion 20154 intersects the second valve shaft inner wall portion 20153, the inner edge intersects the third valve shaft inner wall portion 20155, and when the cross sections of the first valve shaft inner wall portion 20151, the second valve shaft inner wall portion 20153 and the third valve shaft inner wall portion 20155 are all circular, the forward projections of the stepped portion 20152 and the valve shaft abutting portion 20154 along the plane of the cross section of the valve shaft 2011 are circular, and in this embodiment, the stepped portion 20152 and the abutting portion 20154 are not completely horizontal, for example, the stepped portion 20152 and the abutting portion 20154 may be gradually arranged in a horizontal form in a direction, for example, in a direction away from the axis of the 20152, or a direction extending along the valve shaft 20152 along the axial direction, and the valve shaft abutting portion 20152 may be understood to have only to extend in the horizontal direction 20152.
With continued reference to fig. 3, in this embodiment, the valve shaft 2011 includes an outer edge portion 2016, the outer edge portion 2016 includes a first outer edge portion 20161 and a second outer edge portion 20162, the first outer edge portion 20161 is located above the second outer edge portion 20162, in a plane where a cross section of the valve shaft 2011 is located, a front projection of the first outer edge portion 20161 along the plane is located outside a front projection of the second outer edge portion 20162 along the plane, generally, for convenience of processing, a cross section of the first outer edge portion 20161 and a cross section of the second outer edge portion 20162 are both configured to be circular, a rotor fixing portion 201c is disposed at a portion of the valve shaft 2011 where the first outer edge portion 20161 is located, and the rotor 203 and the rotor fixing portion 201c may be fixed by direct or indirect welding, riveting, injection molding of a magnetic plastic material, glue bonding, or the like.
The valve shaft 2011 where the second outer edge 20162 is located is provided with an external screw thread 201a, and the external screw thread 201a (also referred to as a movable screw thread) and an internal screw thread 10b (also referred to as a fixed screw thread) provided in the inner hole of the nut 102 are combined with the external screw thread 201a to constitute a screw feed mechanism (screw pair) of the present motor valve.
Referring to fig. 3, the electric valve of the present embodiment includes a first elastic member 208 and a second elastic member 204, where the first elastic member 208 and the second elastic member 204 may be designed as cylindrical coil springs, the first elastic member 208 and the second elastic member 204 are located in the valve shaft assembly 201, the cylindrical outer diameter of the first elastic member 208 is slightly smaller than the diameter of the first valve shaft inner wall 20151, and the inner edge diameter of the first elastic member 208 is larger than the cylindrical outer diameter of the second elastic member 204. The second elastic member 204 is placed in the first elastic member 208, i.e. the second elastic member 204 is nested in the inner diameter hole of the first elastic member 208, and the first elastic member 208 is sleeved outside the second elastic member 204. Because the second elastic member 204 can be nested in the inner diameter hole of the first elastic member 208, compared with the prior art, the electric valve with the structure of the invention can effectively reduce the height dimension of the electric valve, and is beneficial to saving the installation space of the electric valve in related equipment.
Referring to fig. 3, in the present embodiment, the valve element 202 is disposed through the valve shaft 2011 (the portion of the valve element 202 is disposed in the valve shaft inner wall 2015), and the valve element 202 has a stepped shaft-like structure including a valve element head 202a, the valve element head 202a is disposed at a substantially lower end position of the valve element 202, the tip shape of the valve element head 202a is related to a flow rate adjustment curve required for the electric valve, the valve element 202 further includes a first valve element abutment 202b, the first valve element abutment 202b is disposed at a substantially upper end position of the valve element 202, in the present embodiment, in a plane in which the cross section of the valve element 202 is disposed, an orthographic projection of the valve element head 202a along the plane is disposed in an orthographic projection of the first valve element abutment 202b along the plane, and in the present embodiment, the cross sections of the first valve element head 202a and the first valve element abutment 202b are both circular, and therefore the diameter of the first valve element abutment 202b is larger than the diameter of the valve element head 202a, in the present embodiment, the valve element 202 is inserted into the inner wall 2011 from the upper direction, and the valve shaft 202b can be pushed out of the valve shaft abutment 20152 from the valve shaft inner wall 20152. In the plane where the cross section of the valve element member 202 is located, there is an overlapping area between the orthographic projection of the first valve element abutment portion 202b along the plane and the orthographic projection of the valve shaft abutment portion 20154 along the plane, and therefore, the first valve element abutment portion 202b can abut against the valve shaft abutment portion 20154 (of course, when a gasket or the like is provided between the valve shaft abutment portion 20154 and the first valve element abutment portion 202b so as not to abut directly against the valve shaft abutment portion, the projection relationship between the first valve element abutment portion 202b and the valve shaft abutment portion 20154 may not satisfy the above relationship), in this embodiment, the outer edge of the first valve element abutment portion 202b, the cross-sectional shape of the second valve shaft inner wall portion 20153, and the cross-sectional shape of the third valve shaft inner wall portion 20155 are all circular, and the diameter of the first valve element abutment portion 202b is slightly smaller than the diameter of the second valve shaft inner wall portion 20153, and the diameter of the first valve element abutment portion 202b is larger than the diameter of the third valve shaft inner wall portion 20155, and the diameter of the largest portion 202a of the head portion 202a is smaller than the diameter of the third valve shaft inner wall portion 20155, and the valve element can be supported on the valve shaft abutment portion 20114.
Referring to fig. 3, the electric valve provided in the present application further includes an abutment member 206, the abutment member 206 includes a first abutment portion 206a, the lower end portion of the first elastic member 208 abuts against the first abutment portion 206a, the abutment member 206 further includes a second abutment portion 206b, the second abutment portion 206b can abut against a second spool abutment portion 202c (which will be mentioned later), the abutment member 206 further includes a third abutment portion 206c, the third abutment portion 206c can abut against the valve shaft assembly 201 (step portion 20152 in the present embodiment), the abutment member 206 further includes an abutment member hole portion 206d, the spool member 202 further includes a third spool abutment portion 202d, and the second spring 204 or the needle member 202 can pass through the abutment member hole portion 206d so that the lower end portion of the second spring 204 abuts against the third spool abutment portion 202d of the spool member 202.
With continued reference to fig. 3, in the present embodiment, the abutment member 206 is a washer member 2061, the washer member 2061 is capable of abutting against the stepped portion 20152 (in the fully closed state in fig. 3, the washer member 2061 is in a state of not abutting against the stepped portion 20152), specifically, in a plane in which the cross section of the electric valve is located, an orthographic projection of the washer member 2061 along the plane and an orthographic projection of the stepped portion 20152 along the plane exist, and therefore, the washer member 2061 thereof is capable of abutting against the stepped portion 20152 (of course, when 2 or more washer members 2061 are provided, it is not necessarily required that each washer member 2061 satisfies the above relation with the stepped portion 20152), and in the present embodiment, both the outer edge of the washer member 2061 and the inner edge of the stepped portion 20152 are circular, and the outer diameter of the washer member 2061 is larger than the diameter of the second inner wall portion 20153, and the outer diameter of the washer member 2061 is slightly smaller than the diameter of the first valve shaft inner wall portion 20151.
Therefore, in the present embodiment, the gasket member 2061 includes the first abutting portion 206a (a portion of the gasket member 2061 abutting against the first elastic piece 208), the gasket member 2061 includes the third abutting portion 206c (a portion capable of abutting against the stepped portion 20152), the gasket member 2061 further includes the gasket hole portion 20611, and the gasket hole portion 20611 penetrates the upper and lower surfaces of the gasket 2061, and the abutting member hole portion 206d is the gasket hole portion 20611 in the present embodiment.
Referring to fig. 3, the valve element component 202 provided in this embodiment includes a carrier component 207 and a valve element 2023, where the carrier component 207 is located above the valve element 2023, and the carrier component 207 abuts against the valve element 2023, and the carrier component 207 or the second elastic element 204 may pass through the gasket hole portion 20611 (in this embodiment, in a form that the carrier component 207 passes through the gasket hole portion 20611). The second elastic member 204 abuts against the bearing member 207, and the elastic load of the second elastic member 204 can be transmitted to the spool 2023 through the bearing member 207.
The valve core rotor assembly 20 shown in fig. 3 is in a fully closed state of the electric valve (i.e. the valve core rotor assembly 20 is in the lowest end of its travel), and as shown in conjunction with fig. 1, the valve core head 202a is abutted against and pressed against the valve port 10a, both the first elastic member 208 and the second elastic member 204 are in a compressed state, that is, the valve core member 202 (the bearing member 207 and the valve core 2023) is simultaneously subjected to two downward elastic forces, the first downward elastic force being an elastic force generated by the further compression of the first elastic member 208, which is transmitted to the valve core 2023 through the gasket member 2061, the bearing member 207; the second downward spring force is from the spring force generated by the compression of the second spring 204, which is transferred through the carrier 207 to the spool 2023. The superposition of the two elastic forces can provide the pressing force between the valve core component 202 and the valve port 10a, so that the performance index of resisting the reverse pressure difference when the electric valve is fully closed can be improved.
Compared with the electric valve in the background art, the electric valve is further provided with the second elastic piece 204 in the first elastic piece 208, and the elastic force of the second elastic piece 204 can be overlapped with the elastic force of the first elastic piece 208, so that the elastic force acting on the valve core component 202 can be further improved, and the capability of resisting reverse pressure difference when the electric valve is fully closed is further improved.
Because the first elastic member 208 and the second elastic member 204 are sleeved together, in order to reduce the possibility of winding the first elastic member 208 and the second elastic member 204, it is preferable that the spiral direction of the second elastic member 204 is opposite to the spiral direction of the first elastic member 208, so that the first elastic member 208 and the second elastic member 204 are prevented from being blocked together.
As in the state of the electric valve in fig. 3, the carrier member 207 abuts against the washer member 2061, and the washer member 2061 is lifted up by the carrier member 207, specifically, in the present embodiment, the carrier member 207 includes the second spool abutment portion 202c (a portion abutting against the washer member 2061), and the washer member 2061 includes the second abutment portion 206b (a portion abutting against the carrier member 207).
In the present embodiment, in the plane in which the cross section of the valve shaft assembly 201 is located, there is an overlapping area of the front projection of the washer member 2061 along the plane and the front projection of the second spool abutment portion 202c along the plane, and therefore, the washer member 2061 thereof can abut against the spool member 202 (the bearing member 207 in the present embodiment) (of course, the above projection relationship may not be satisfied when other members are provided between the washer member 2061 and the bearing member 207 so as to abut therebetween), in the present embodiment, the washer hole portions 20611 are rounded at both the outermost edges of the washer hole portions 20611 and the bearing member 207, and the diameter of the outer contour of the bearing member 207 is slightly smaller than the diameter of the inner wall portion 20153 of the second valve shaft.
In this embodiment, the top of the valve element 2023 is in a ball-top state, and the portion of the lower side of the center of the bearing member 207, which is matched with the valve element 2023, is in a concave spherical shape, and the two are in point contact when in tight fit. Here, by using the point contact engagement, the frictional resistance of the spool 2023 against the rotation of the carrier member 207 can be reduced, and the frictional force arm of the point contact is theoretically zero, so that the frictional resistance therebetween is small.
Therefore, when the valve element head 202a of the electric valve contacts the valve port 10a, the valve element 2023 rotates relatively to the valve port 10a, so that the rotation friction between the valve element head 202a and the valve port 10a can be reduced, and the valve port leakage problem caused by abrasion can be reduced.
Of course, it is a theoretical state that the contact portion between the top of the valve element 2023 and the carrier 207 is point contact, and it is difficult to ensure that the contact portion between the two is point contact during actual machining.
Fig. 4 is a sectional view of the valve body of the electric valve of the present invention when the spool member is opened to a state where the spool member does not just bear the elastic load of the first elastic member, and a partially enlarged view thereof. The position of the valve core rotor assembly 20 in fig. 4 is compared with the rotor position when the electric valve is fully closed in fig. 1, the valve core rotor assembly 20 is opened upwards, and the valve core head 202a still abuts against the valve port 10a. With the position of the valve core rotor assembly 20 shown in fig. 4 as a critical point, if the valve core rotor assembly 20 continues to open upward, the elastic force of the first elastic member 208 will be carried by the stepped portion 20152 through the transmission of the gasket member 2061, and the bearing member 207 and the valve core 2023 will no longer receive the elastic load of the first elastic member 208. At this time, the elastic force of the second elastic member 204 is still transferred to the valve housing 2023 through the bearing member 207, and the valve housing 2023 is still subjected to the downward elastic load of the second elastic member 204. The valve element 2023 shown in fig. 4 is acted by the downward elastic force of the second elastic element 204, the valve element head 202a thereof abuts against the valve port 10a, the first valve element abutting portion 202b is spaced from the valve shaft abutting portion 20154 by a distance h-k, and h-k > 0.
Fig. 5 is a cross-sectional view of the valve body of the electric valve of the present invention, and a partial enlarged view thereof, when the valve body head is opened to just not contact the valve port. The position of the valve spool rotor assembly 20 in fig. 5 is open upward by a height h-k as compared to the position of the valve spool rotor assembly 20 in fig. 4, when the valve spool head 202a is just in a critical state abutting the valve port 10 a. The valve element 2023 is subjected to the downward elastic force of the second elastic member 204, and the first valve element abutment portion 202b thereof just contacts the valve shaft abutment portion 20154, and the elastic force of the first elastic member 208 is transmitted through the washer member 2061 and is supported by the stepped portion 20152. The second spool abutment 202c of the carrier member 207 is spaced from the second abutment 206b of the gasket member 2061 by a distance h-k, with h-k > 0.
In the state shown in fig. 5, the valve core head 202a is just in the critical state of contacting the valve port 10a, and in the process of needing frequent switching, the impact force and abrasion between the sealing parts of the valve core head 202a and the valve port 10a are large at the moment of just contacting and separating the valve core head 202a and the valve port 10 a. In the critical state (i.e., the state shown in fig. 5) in which the valve element head 202a just contacts the valve port 10a, the valve element 2023 is not subjected to the elastic load of the first elastic member 208 but is subjected to the elastic load of the second elastic member 204, and the elastic load of the gasket member 2061 by the first elastic member 208 is larger than the elastic load of the valve element member 202 by the second elastic member 204. Therefore, the pressing force applied to the electric valve of the present invention is not particularly large at the moment when the valve element 2023 is in contact with and separated from the valve port 10a, so that the abrasion occurring between the valve element 2023 and the valve port 10b can be reduced, and the problem of leakage of the valve port 10a due to abrasion can be reduced.
Fig. 6 is a cross-sectional view of the valve body when the electric valve of the present invention is opened to the maximum opening degree, and a partial enlarged view thereof. The spool rotor assembly 20 of the electric valve is opened from the position shown in fig. 5 to the position shown in fig. 6, the ram main body portion 2051 is in contact with the housing 30, the spool 2023 thereof is always subjected to the pressure difference force across the valve port 10a, the elastic force of the second elastic member 204 and the self-gravity force thereof, the first spool abutment portion 202b thereof is always abutted against the valve shaft abutment portion 20154, and the elastic force of the first elastic member 208 is carried by the stepped portion 20152 through the transmission of the gasket member 2061. When the spool rotor assembly 20 is in the position shown in fig. 6, the spool rotor assembly 20 is opened to the maximum opening position in its normal operation state, and at this time, the top end of the ejector main body portion 2051 at the upper end of the spool rotor assembly 20 just contacts the top inner wall of the housing 30.
Fig. 7 is a cross-sectional view of the valve body and a partial enlarged view thereof when the motor-operated valve of the present invention is excessively opened to the point where the screw pair is disengaged. From the state shown in fig. 6, if the valve core rotor assembly 20 continues to be opened upward, an excessively opened state (excessively opened: a state when the valve core rotor assembly 20 is opened upward beyond its prescribed upper limit stroke) occurs, and as the valve core rotor assembly 20 moves upward, the second elastic member 204 is compressed downward, and in fig. 7, the second elastic member 204 is compressed downward by an amount of compression m with respect to the state in fig. 6, and the valve core rotor assembly 20 is subjected to a downward elastic load of the second elastic member 204. If the valve core rotor assembly 20 is further excessively opened, the external thread 201a of the valve shaft assembly 201 is disengaged from the internal thread 10b of the nut 102 (i.e., the state shown in fig. 7), and after the disengagement, the valve core rotor assembly 20 will not move upward any more, and if the coil 40 drives the valve core rotor assembly 20 in the closing direction of the electric valve, the pair of threads will be re-screwed when the valve core rotor assembly 20 rotates due to the downward elastic load of the second elastic member 204 on the valve core rotor assembly 20.
It can be seen that in this embodiment, the second elastic member 204 serves two functions: when the first is the electric valve in the fully closed state, the elastic force of the second elastic piece 204 can strengthen the propping force of the valve core 2023 and the valve port 10a, so that the capability of the electric valve for resisting reverse pressure difference is improved; second, when the electric valve is excessively opened, the second elastic member 204 presses the valve shaft assembly 201 downward, so that the valve core rotor assembly 20 which is excessively opened and disengaged can be reset.
Referring to fig. 1, 4, 5 and 6, the valve element 2023 is not subjected to the elastic load of the first elastic member 208 when the rotor member 20 is opened upward from the fully closed state to the fully open state in fig. 4 or closed from the fully open state to the state in fig. 4. Particularly, at the moment when the valve core head 202a is in contact with the valve port 10a in a sealing part switch manner, the valve core part 202 is not subjected to the elastic load of the first elastic piece 208, so that the impact force of the valve needle part 202 on the valve port 10a can be reduced, the friction force of relative rotation movement between the two sealing parts can be reduced, the abrasion of the contact part can be reduced, and the service life of the electric valve can be prolonged.
Referring to fig. 4, the core points of the structural features in this embodiment that can achieve the above functional effects are: in the case where no other member is provided such that some two members (the valve shaft assembly 201 and the gasket member 2061, and the valve element 2023 and the valve shaft assembly 201) are indirectly abutted against each other, the height h between the stepped portion 20152 and the valve shaft abutment portion 20154 is greater than the height k between the first valve element abutment portion 202b and the second valve element abutment portion 202c, that is, h > k. In FIGS. 4, 5 and 6, h > k, in fact h-k > 0, is preferably greater than 0 and less than 0.3mm because the electrically operated valve has a certain opening stroke.
Fig. 8 is a cross-sectional view of a valve body when the second embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partial enlarged view thereof.
The valve element 2023 in this embodiment includes a valve element main body portion 2021 and a valve element sleeve 2022, the valve element sleeve 2022 includes a valve element sleeve hole portion 20221, the valve element sleeve hole portion 20221 penetrates through the upper and lower surfaces of the valve element sleeve 2022, the upper end of the valve element main body portion 2021 penetrates through the valve element sleeve hole portion 20221, and the valve element main body portion 2021 and the valve element sleeve 2022 may be fixedly connected by press-fitting, welding, bonding or other manners.
Further, in the present embodiment, the valve element head 202a is provided with a diameter larger than that of the third valve shaft inner wall portion 20155. The valve body 2021 is inserted into the central through hole of the valve shaft 2011 from bottom to top, and the valve housing 2022 is then fitted and fixed to a substantially upper end position of the valve body 2021 from top to bottom.
Of course, the valve core sleeve hole portion 20221 may also adopt a blind hole form, that is, the valve core main body portion 2021 is fixedly connected with the valve core sleeve 2022, but the valve core main body portion 2021 does not pass through from above the valve core sleeve hole portion 20221, that is, the valve core sleeve hole portion 20221 of the present invention is not limited to a through hole form; alternatively, the cartridge pocket 20221 may be in the form of a through hole, but the cartridge body 2021 does not pass through the top of the cartridge pocket 20221.
In the present embodiment, the spool sleeve 2022 can abut against the valve shaft abutment 20154, the spool sleeve 2022 includes the first spool abutment portion 202b, the bearing member 207 can bear the elastic load of the second elastic member 204 and transmit the elastic load of the second elastic member 204 to the spool 2023, the bearing member 207 includes the third spool abutment portion 202d, the washer member 2061 can be supported by the bearing member 207 and away from the stepped portion 20152, and the bearing member 207 includes the second spool abutment portion 202c.
Fig. 9 is a cross-sectional view of a valve body when the third embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partial enlarged view thereof.
Compared with the second embodiment in fig. 8 of the same opening state, the present embodiment differs mainly in that: part of the bearing member 207 is located within the spool housing 2022, and during the ascent of the spool member 202 relative to the valve shaft assembly 201, the gasket member 2061 is supported and lifted by the upper end surface of the spool housing 2022, and in this embodiment, the spool housing 2022 includes the second spool abutment portion 202c.
Fig. 10 is a cross-sectional view of a valve body when the fourth embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partial enlarged view thereof. Compared with the second embodiment in fig. 8 in the same opening state, the structure of the valve core sleeve 2022 is slightly different, the valve core sleeve hole portion 20221 is a blind hole structure, the top of the valve core sleeve 2022 is in a spherical state, and the top surface of the valve core sleeve is in contact fit with the concave surface on the lower side of the center of the bearing part 207. The structural scheme of other parts of the present embodiment may be the same as or similar to that of the second embodiment in fig. 8.
Fig. 11 is a sectional view of a valve body when the fifth embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partial enlarged view thereof. Compared with the first embodiment in fig. 5, the difference is mainly that the convex spherical surface at the top of the valve element 2023 is changed into a concave spherical surface, while the concave spherical surface at the lower side of the bearing member 207 is changed into a convex spherical surface, and the matching effect of the two is the same after the change; the valve element 2023 is formed by separately machining two parts and fixedly connecting the two parts. The structural scheme of other parts of the present embodiment may be the same as or similar to that of the first embodiment in fig. 5.
Fig. 12 is a cross-sectional view of a valve body when the sixth embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partial enlarged view thereof. Compared to the fifth embodiment in fig. 11, the difference is mainly that: the top of the valve core 2023 is provided with a steel ball accommodating portion 202e, the steel ball accommodating portion 202e is a groove arranged at the top of the valve core 2023, a steel ball 2024 is arranged in the steel ball accommodating portion 202e, and the spherical top of the steel ball 2024 is in point contact with the lower end surface of the bearing member 207. Since the surface of the steel ball 2024 is smoother and its hardness and wear resistance are higher, the life of the above-mentioned moving contact portion of the electric valve can be further improved. The structural scheme of other portions of the present embodiment may be the same as or similar to that of the fifth embodiment in fig. 11.
Fig. 13 is a cross-sectional view of a valve body and a partially enlarged view thereof when an electrically operated valve according to a seventh embodiment of the present invention is in a fully closed state. The difference from the first embodiment in fig. 4 is mainly that the structure of the spool member 202 is changed, specifically, the spool 2023 and the portion corresponding to the carrier member 207 are integrally formed, and in this case, the spool member 202 includes a first spool abutment portion 202b, a second spool abutment portion 202c, and a third spool abutment portion 202d.
Fig. 14 is a cross-sectional view of a valve body and a partial enlarged view thereof when an electrically operated valve according to an eighth embodiment of the electrically operated valve of the present invention is in a fully closed state. The difference compared to the seventh embodiment in fig. 13 is mainly that the spool member 202 does not pass through the gasket hole portion 20611, and the second elastic member 204 abuts against the spool member 202 through the gasket hole portion 20611.
Fig. 15 is a cross-sectional view of a valve body when the ninth embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partially enlarged view thereof. The difference between the structure of the carrier 207 and the fifth embodiment in fig. 11 is that the carrier 207 does not pass through the washer hole portion 20611, and the second elastic member 204 abuts against the carrier 207 through the washer hole portion 20611.
Fig. 16 is a cross-sectional view of a valve body and a partial enlarged view thereof when an electrically operated valve according to a tenth embodiment of the electrically operated valve of the present invention is in a fully closed state.
In the present embodiment, the structure of the valve shaft assembly 201 is changed, specifically, the valve shaft assembly 201 includes a valve shaft main body part 2013 and a tubular member 2014, the valve shaft main body part 2013 has a through hole penetrating up and down, the valve shaft main body part 2013 is provided with an external screw thread part 201a, the valve shaft main body part 2013 is fixedly connected with the tubular member 2014, a substantially side wall region of a central through hole after the fixing connection of the two forms a valve shaft inner wall part 2015, and in the present embodiment, an upper end part of the valve shaft main body part 2013 extends into the through hole of the tubular member 2014, of course, a form in which the valve shaft main body part 2013 does not extend into the through hole of the tubular member 2014 and is fixed at a lower end of the tubular member 2014 may also be adopted. The cylindrical member 2014 is substantially hollow and cylindrical, the cylindrical member abutment portion 20141 is provided substantially above the cylindrical member 2014, the cylindrical member through hole portion 201411 is provided at a substantially central position of the cylindrical member abutment portion 20141, and an orthographic projection of the cylindrical member through hole portion 201411 along the plane is located outside an orthographic projection of the ejector rod main body portion 2051 along the plane and within an orthographic projection of the ejector rod abutment portion 2052 along the plane in the plane on a plane where the cross section of the valve shaft assembly 201 is located, and in this embodiment, the diameter of the cylindrical member through hole portion 201411 is larger than the diameter of the ejector rod main body portion 2051 and smaller than the diameter of the ejector rod abutment portion 2052, so that the ejector rod abutment portion 2052 can abut against the cylindrical member abutment portion 20141.
In the present embodiment, the valve body 2023 can abut against the upper end surface of the valve shaft main body 2013, the upper end surface of the valve shaft main body 2013 forms a valve shaft abutment 20154, the first elastic member 208 and the second elastic member 204 are accommodated in a space defined by the cylindrical member 2014 and the valve shaft main body 2013, the cylindrical member abutment 20141 abuts against the first elastic member 208, and the cylindrical member abutment 20141 can abut against the stem abutment 2052, so that in the present embodiment, the cylindrical member abutment 20141 includes a spring abutment 20a, and the stem main body 2051 can be pulled out from the cylindrical member through hole 201411 to abut against the housing 30.
With continued reference to fig. 16, the abutment member 206 provided in this embodiment includes an abutment frame 2062, the abutment frame 2062 being capable of abutting against the valve shaft abutment 20154. Specifically, the abutment frame 2062 has a generally cylindrical structure including an abutment frame top 20621 at the top and an abutment frame side 20622 extending generally downward along the peripheral edge of the abutment frame top 20621.
In the present embodiment, the stepped portion 2015 is not provided in the valve shaft inner wall portion 2015, specifically, the first spool abutting portion 202b can abut against the valve shaft abutting portion 20154, the abutting frame 2062 is fitted over the spool 2023, the lower end of the abutting frame side portion 20622 of the abutting frame 2062 abuts against the valve shaft abutting portion 20154 (therefore, the stepped portion 2015 may not be provided in the valve shaft inner wall portion 2015, the function of the stepped portion 20152 is realized by the valve shaft abutting portion 20154), the abutting frame 2062 includes the third abutting portion 206c (a portion abutting against the valve shaft abutting portion 20154) in the present embodiment, and the abutting frame top portion 20621 abuts against the first elastic member 208, and the abutting frame 2062 includes the first abutting portion 206a in the present embodiment.
In the present embodiment, the abutment frame 2062 further includes an abutment frame hole 20623, the abutment frame hole 20623 penetrates the upper and lower surfaces of the abutment frame top 20621, the upper end of the carrier member 207 penetrates the abutment frame hole 20623, and the upper end of the carrier member 207 penetrates the second elastic member 204 and is positioned at the inner edge of the through hole of the second elastic member 204, and the abutment member hole 206d is the abutment frame hole 20623.
Through the arrangement, when the second elastic piece 204 is about to radially deviate, the second elastic piece 204 can be limited by the bearing component 207, so that the radial deviation of the second elastic piece 204 can be reduced, the second elastic piece 204 is more stable in the electric valve, and the service life of the electric valve can be prolonged.
In the present embodiment, the height of the valve shaft abutting portion 20154 to the second abutting portion 206b is h, the distance from the first spool abutting portion 202b to the second spool abutting portion 202c is k, and as shown in fig. 16, the second abutting portion 206b and the second spool abutting portion 202c are in a state of just touching, and at this time, the first spool abutting portion 202b and the valve shaft abutting portion 20154 are at a distance h-k.
When the valve element member 202 is raised by the distance h-k with respect to the valve shaft assembly 201, the abutment frame top portion 20621 of the abutment frame 2062 contacts the second valve element abutment portion 202c, the abutment frame top portion 20621 includes the second abutment portion 206b, the first valve element abutment portion 202b and the valve shaft abutment portion 20154 are brought into a non-abutted state from the abutted state, and when the valve element member 202 is further raised with respect to the valve shaft assembly 201, the second abutment portion 206b of the abutment frame 2062 is brought into abutment with the second valve element abutment portion 202c, and the valve element member 202 receives the elastic load of the first elastic member 208, and the elastic force of the first elastic member 208 can be transmitted to the valve port 10a through the valve element 2023.
Of course, although the step portion 20152 is not provided for the embodiment, the step portion 20152 may be provided for the present application, for example, the step portion 20152 may be provided in the valve shaft inner wall portion 2015, and the step portion 20152 may abut against the lower end of the abutment frame side portion 20622, and the technical effects of the present application may be achieved.
Fig. 17 is a cross-sectional view of a valve body when the eleventh embodiment of the electric valve of the present invention is opened to the maximum opening degree, and a partially enlarged view thereof.
In the present embodiment, the main difference compared to the seventh embodiment in fig. 13 is that the spool member 202 is provided with a spool main body portion 2021 and a spool sleeve 2022, the spool main body portion 2021 and the spool sleeve 2022 are fixedly connected, in the present embodiment, the spool main body portion 2021 includes a third spool abutment portion 202d, and the spool sleeve 2022 includes a first spool abutment portion 202b and a second spool abutment portion 202c. The spool body 2021 passes through the gasket hole 20611, and the second elastic member 204 abuts against the spool body 2021.
Of course, the valve element body portion 2021 may be configured so as not to pass through the gasket hole portion 20611, and the second elastic member 204 may pass through the gasket hole portion 20611 to abut against the valve element member 202.
Fig. 18 is a cross-sectional view of a valve body when an electric valve of a twelfth embodiment of the electric valve of the present invention is opened to a maximum opening degree, and a partially enlarged view thereof. The difference from the fourth embodiment in fig. 10 is mainly that the structure of the spool member 202 is changed, specifically, the spool sleeve 2022 and the portion corresponding to the carrier member 207 are integrated, and in this embodiment, the spool sleeve 2022 includes a first spool abutment portion 202b, a second spool abutment portion 202c, and a third spool abutment portion 202d.
Of course, in the present embodiment, the abutment member 206 may also take the form of the abutment frame 2062, and the valve shaft assembly 201 may also take the form of the valve shaft main body 2013 and the cylindrical member 2014, and the present embodiment is described in terms of the structure of the valve element member 202, and the forms of the valve element member 202 and other members are not in conflict and contradiction.
Therefore, the valve element member 202 of the present invention may be formed by integrally forming all of the valve element main body 2021, the valve element sleeve 2022, and the carrier member 207, by alternatively forming all of them integrally, or by separately forming all of them.
Therefore, the conventional separation, integration, etc. of some parts of the electric valve are changed, but the functions of the geometric corresponding parts are basically the same after the electric valve is assembled, which still belongs to the concept of the present invention, for example, the structure of the valve core part 202 in fig. 8 is changed to a certain extent relative to the structure of the valve core part 202 in the first embodiment of fig. 7, but the functions of the geometric corresponding parts are not changed substantially, and the structures with the changed and combined geometric corresponding parts are also included in the scope of the protection of the patent claims of the present invention.
It should be noted that, in the embodiment shown in the present specification, a gasket or a washer may be added to the lower end of the second elastic member 204, or a gasket may be provided between the first valve element abutment portion 202b and the valve shaft abutment portion 20154, or a gasket or a washer may be added to the upper end of the second elastic member 204, or a gasket or a washer may be added between the carrier member 207 and the valve element 2023, so that the core content of the present application is not affected.
In the above embodiment, the ejector 205 is provided so as to be able to abut against the housing 30, but of course, other members may be connected to the housing 30, and the ejector 205 may abut against the member.
In addition, in order to further reduce the friction resistance of the relative rotation of the gasket or the washer, the upper surface and the lower surface of the gasket or the washer which are subjected to the rotary friction fit can be coated or plated with a coating (such as a coating containing polytetrafluoroethylene, graphite or molybdenum disulfide component) with a lubricating and wear-resisting function, so that the service life of the electric valve is prolonged.
Based on the above embodiments, the core structure of the present invention is utilized to make some adaptive changes in adding antifriction washers or gaskets, which all fall within the scope of the patent claims of the present invention.
It should be noted that, in the above-described forming manner of the valve port 10a and whether the connection pipe is provided, various schemes are provided, and "ok" is used in the specification, so it should be understood that "ok" of the present application is not to be interpreted as "necessary".
It should be noted that, in this embodiment, terms of up, down, left, right and other directions are all introduced for convenience of description with reference to the drawings in the specification; and the ordinal numbers "first," "second," etc., in the names of the components are also introduced for descriptive convenience and are not meant to imply any limitation on any order of the components.
The above describes the electrically operated valve provided by the present invention in detail. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the invention. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.

Claims (10)

1. An electrically operated valve comprising a valve body including a valve seat member (10), a valve core rotor assembly (20), and a housing (30);
the valve seat member (10) includes a nut (102), the nut (102) including an internal thread portion (10 b); the valve seat component (10) is fixedly connected with the shell (30);
the valve core rotor assembly (20) comprises a valve shaft assembly (201), a valve core component (202), a first elastic piece (208), a second elastic piece (204), an abutting component (206) and a push rod (205);
the valve shaft assembly (201) comprises a valve shaft abutting part (20154), an external thread part (201 a) and a spring abutting part (20 a), wherein the external thread part (201 a) can be in threaded fit with the internal thread part (10 b);
The valve element member (202) includes a first valve element abutment portion (202 b), the first valve element abutment portion (202 b) being capable of abutting against the valve shaft abutment portion (20154);
the ejector rod (205) comprises an ejector rod main body part (2051) and an ejector rod abutting part (2052), wherein a part of the ejector rod main body part (2051) extends out of a through hole at the upper end of the valve shaft assembly (201), and the ejector rod main body part (2051) can abut against the shell (30);
the upper end of the first elastic member (208) abuts against the spring abutting portion (20 a), the abutting member (206) includes a first abutting portion (206 a), the lower end of the first elastic member (208) abuts against the first abutting portion (206 a), the abutting member (206) includes a second abutting portion (206 b), the valve element member (202) includes a second valve element abutting portion (202 c), the second abutting portion (206 b) can abut against the second valve element abutting portion (202 c), the abutting member (206) includes a third abutting portion (206 c), and the third abutting portion (206 c) can abut against the valve shaft assembly (201);
the first elastic piece (208) is sleeved outside the second elastic piece (204), the upper end part of the second elastic piece (204) is propped against the ejector rod propping part (2052), the ejector rod propping part (2052) can be propped against the spring propping part (20 a), the propping part (206) comprises a propping part hole part (206 d), the valve core part (202) comprises a third valve core propping part (202 d), and the lower end part of the second elastic piece (204) is propped against the third valve core propping part (202 d) through the propping part hole part (206 d).
2. The electrically operated valve according to claim 1, characterized in that the valve seat part (10) comprises a valve port (10 a), the valve core part (202) comprises a valve core head part (202 a), the electrically operated valve comprising the following operating states: the external thread part (201 a) is in threaded fit with the internal thread part (10 b); the valve core head (202 a) is abutted against the valve port (10 a), and the first valve core abutting portion (202 b) is not abutted against the valve shaft abutting portion (20154); the second abutting portion (206 b) abuts against the second valve element abutting portion (202 c), the third abutting portion (206 c) does not abut against the valve shaft assembly (201), the ejector pin abutting portion (2052) abuts against the spring abutting portion (20 a), and the ejector pin main body portion (2051) does not abut against the housing (30).
3. The electrically operated valve of claim 2, comprising the following operating states: the external thread part (201 a) is in threaded fit with the internal thread part (10 b); the valve core head (202 a) is abutted against the valve port (10 a), and the first valve core abutting portion (202 b) is not abutted against the valve shaft abutting portion (20154); the second abutting portion (206 b) is in contact with but not in contact with the second valve element abutting portion (202 c), the third abutting portion (206 c) is in contact with the valve shaft assembly (201), the ejector pin abutting portion (2052) is in contact with the spring abutting portion (20 a), and the ejector pin main body portion (2051) is not in contact with the housing (30).
4. The electrically operated valve of claim 2, comprising the following operating states: the external thread part (201 a) is in threaded fit with the internal thread part (10 b); the valve core head (202 a) is in contact with but not in contact with the valve port (10 a), and the first valve core abutting portion (202 b) is in contact with the valve shaft abutting portion (20154); the second abutting portion (206 b) is not abutted against the second valve element abutting portion (202 c), the third abutting portion (206 c) is abutted against the valve shaft assembly (201), the ejector pin abutting portion (2052) is abutted against the spring abutting portion (20 a), and the ejector pin main body portion (2051) is not abutted against the housing (30).
5. The electrically operated valve of claim 2, comprising the following operating states: the external thread part (201 a) is in threaded fit with the internal thread part (10 b); the valve core head (202 a) is not abutted against the valve port (10 a), and the first valve core abutting portion (202 b) is abutted against the valve shaft abutting portion (20154); the second abutting portion (206 b) is not abutted against the second valve element abutting portion (202 c), the third abutting portion (206 c) is abutted against the valve shaft assembly (201), the ejector pin abutting portion (2052) is abutted against the spring abutting portion (20 a), and the ejector pin main body portion (2051) is in contact with but not abutted against the housing (30).
6. The electrically operated valve of claim 2, comprising the following operating states: the external thread portion (201 a) is not threadedly engaged with the internal thread portion (10 b); the valve core head (202 a) is not abutted against the valve port (10 a), and the first valve core abutting portion (202 b) is abutted against the valve shaft abutting portion (20154); the second abutting portion (206 b) is not abutted against the second valve element abutting portion (202 c), the third abutting portion (206 c) is abutted against the valve shaft assembly (201), the ejector pin abutting portion (2052) is not abutted against the spring abutting portion (20 a), and the ejector pin main body portion (2051) is abutted against the housing (30).
7. The electrically operated valve according to any one of claims 1-6, wherein the valve shaft assembly (201) comprises a step portion (20152), the step portion (20152) being located above the valve shaft abutment portion (20154), the step portion (20152) being capable of abutting against the third abutment portion (206 c).
8. The electrically operated valve of any one of claims 1-6, wherein the valve shaft assembly (201) includes an abutment frame (2062), the abutment frame (2062) including an abutment frame top (20621), an abutment frame side (20622), and an abutment frame aperture (20623) extending through upper and lower surfaces of the abutment frame top (20621);
The lower end of the abutting frame side part (20622) abuts against the valve shaft abutting part (20154), the abutting frame (2062) comprises a third abutting part (206 c), the abutting frame top part (20621) abuts against the first elastic piece (208), and the abutting frame (2062) comprises a first abutting part (206 a); the lower end of the second elastic member (204) is abutted against the third valve element abutment portion (202 d) through an abutment frame hole portion (20623), and the abutment member hole portion (206 d) is the abutment frame hole portion (20623).
9. The electrically operated valve according to any one of claims 1-6, wherein the valve shaft assembly (201) comprises a valve shaft (2011) and a bushing (2012), the bushing (2012) being fixedly connected to the valve shaft (2011), the bushing (2012) comprising the spring abutment (20 a), the bushing (2012) comprising a bushing bore (20121), a portion of the carrier body (2051) protruding from the bushing bore (20121).
10. The electrically operated valve according to any one of claims 1-6, wherein the valve shaft assembly (201) comprises a valve shaft body portion (2013) and a cylindrical member (2014), the valve shaft body portion (2013) and the cylindrical member (2014) being fixedly connected, the cylindrical member (2014) comprising a cylindrical member abutment portion (20141), the cylindrical member abutment portion (20141) comprising the spring abutment portion (20 a), a cylindrical member through hole portion (201411) being provided at a substantially central position of the cylindrical member abutment portion (20141), a portion of the ejector rod body portion (2051) protruding from the cylindrical member through hole portion (201411).
CN202111307370.6A 2021-02-01 2021-11-05 Electric valve Active CN114838187B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/074247 WO2022161429A1 (en) 2021-02-01 2022-01-27 Electrically-operated valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110135662X 2021-02-01
CN202110135662 2021-02-01

Publications (2)

Publication Number Publication Date
CN114838187A CN114838187A (en) 2022-08-02
CN114838187B true CN114838187B (en) 2023-06-02

Family

ID=82561602

Family Applications (3)

Application Number Title Priority Date Filing Date
CN202111268357.4A Active CN114838185B (en) 2021-02-01 2021-10-29 Electric valve
CN202111268358.9A Active CN114838186B (en) 2021-02-01 2021-10-29 Electric valve
CN202111307370.6A Active CN114838187B (en) 2021-02-01 2021-11-05 Electric valve

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CN202111268357.4A Active CN114838185B (en) 2021-02-01 2021-10-29 Electric valve
CN202111268358.9A Active CN114838186B (en) 2021-02-01 2021-10-29 Electric valve

Country Status (2)

Country Link
CN (3) CN114838185B (en)
WO (1) WO2022161429A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114838185B (en) * 2021-02-01 2023-07-28 浙江三花智能控制股份有限公司 Electric valve

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470746A (en) * 1945-10-08 1949-05-17 Bendix Aviat Corp Valve
JPH0740136Y2 (en) * 1987-07-27 1995-09-13 株式会社キッツ Solenoid valve with pressure-relief function
JPH1130354A (en) * 1997-07-14 1999-02-02 Fuji Koki Corp Electric operated valve
JP2001311477A (en) * 2000-04-28 2001-11-09 Nok Corp Solenoid valve
US6405743B1 (en) * 2000-11-03 2002-06-18 Eaton Corporation Dampening of solenoid operated valve
JP4515045B2 (en) * 2003-04-02 2010-07-28 株式会社不二工機 Motorized valve
US7163188B1 (en) * 2004-07-30 2007-01-16 Emerson Electric Co. Solenoid valve for fluid flow
CN100547272C (en) * 2006-08-31 2009-10-07 浙江三花制冷集团有限公司 A kind of mortor operated valve
CN201902636U (en) * 2010-12-24 2011-07-20 重庆凌达实业有限公司 Automatic vacuum air throttle
CN204025800U (en) * 2014-06-26 2014-12-17 华中科技大学无锡研究院 A kind of two damping One-stage Water Hydraulic Relief Valve
JP6322562B2 (en) * 2014-12-19 2018-05-09 太平洋工業株式会社 Motorized valve
JP6721237B2 (en) * 2016-06-29 2020-07-08 株式会社不二工機 Motorized valve
JP6461872B2 (en) * 2016-08-30 2019-01-30 株式会社不二工機 Motorized valve
CN108317259B (en) * 2017-01-18 2020-05-05 浙江三花制冷集团有限公司 Electronic expansion valve
CN206786099U (en) * 2017-05-31 2017-12-22 中国海洋大学 A kind of electronic directional control valve and the electronic direction controlling valve group being made from it
CN110296266B (en) * 2018-03-23 2021-08-27 浙江三花智能控制股份有限公司 Electronic expansion valve
CN209042826U (en) * 2018-08-17 2019-06-28 浙江盾安禾田金属有限公司 Electric expansion valve
CN111828713A (en) * 2019-04-23 2020-10-27 浙江盾安禾田金属有限公司 Electronic expansion valve
CN210372219U (en) * 2019-06-13 2020-04-21 浙江盾安禾田金属有限公司 Electronic expansion valve
CN210949939U (en) * 2019-08-27 2020-07-07 浙江中宝自控元件有限公司 Electric valve
CN210951999U (en) * 2019-08-30 2020-07-07 浙江盾安禾田金属有限公司 Electronic expansion valve and refrigeration equipment with same
CN211875244U (en) * 2020-04-08 2020-11-06 鞍山电磁阀有限责任公司 Recoil type electromagnetic valve and electro-hydraulic control system
CN112178223A (en) * 2020-10-16 2021-01-05 浙江盾安人工环境股份有限公司 Valve core assembly and electronic expansion valve
CN114838185B (en) * 2021-02-01 2023-07-28 浙江三花智能控制股份有限公司 Electric valve

Also Published As

Publication number Publication date
CN114838187A (en) 2022-08-02
CN114838185B (en) 2023-07-28
CN114838185A (en) 2022-08-02
CN114838186A (en) 2022-08-02
WO2022161429A1 (en) 2022-08-04
CN114838186B (en) 2023-06-02

Similar Documents

Publication Publication Date Title
CN210344303U (en) Electric valve
CN114838187B (en) Electric valve
CN214662107U (en) Electric valve
WO2021228013A1 (en) Electronic expansion valve
CN113685559A (en) Electronic expansion valve
CN114838147B (en) Electric valve
CN115126885A (en) Electric valve
CN116412253A (en) Electric valve
CN114838179A (en) Electric valve
CN113775771A (en) Electric valve
WO2022161426A1 (en) Electric valve
CN109812613B (en) Electric valve
CN113775767A (en) Electric valve and assembling method thereof
CN218992370U (en) Control valve
CN220134624U (en) Electronic expansion valve
CN112879573A (en) Electronic expansion valve
CN115681513A (en) Electric valve
CN116066581A (en) Electric valve
CN219529863U (en) Electric valve
CN115681511A (en) Electric valve
CN219242649U (en) Electric valve
CN219841044U (en) Electronic expansion valve, thermal management system with electronic expansion valve and vehicle
WO2023005178A1 (en) Electric valve
CN114838178A (en) Electric valve
CN115681512A (en) Electric valve

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant