WO2019080691A1 - 一种电动阀 - Google Patents

一种电动阀

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Publication number
WO2019080691A1
WO2019080691A1 PCT/CN2018/108293 CN2018108293W WO2019080691A1 WO 2019080691 A1 WO2019080691 A1 WO 2019080691A1 CN 2018108293 W CN2018108293 W CN 2018108293W WO 2019080691 A1 WO2019080691 A1 WO 2019080691A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
nut
valve body
fixed
valve seat
Prior art date
Application number
PCT/CN2018/108293
Other languages
English (en)
French (fr)
Inventor
吕铭
支建成
杨达迈
Original Assignee
浙江三花制冷集团有限公司
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 浙江三花制冷集团有限公司 filed Critical 浙江三花制冷集团有限公司
Priority to US16/758,148 priority Critical patent/US11365822B2/en
Priority to JP2020522977A priority patent/JP6951571B2/ja
Priority to EP18869836.9A priority patent/EP3702649B8/en
Priority to KR1020227008393A priority patent/KR102402959B1/ko
Priority to KR1020207013873A priority patent/KR102375852B1/ko
Publication of WO2019080691A1 publication Critical patent/WO2019080691A1/zh

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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
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F16K31/508—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • F16K1/42—Valve seats
    • 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
    • F16K25/00—Details relating to contact between valve members and seats
    • F16K25/005—Particular materials for seats or closure elements
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • 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

Definitions

  • the present invention relates to the field of fluid control technology, and in particular to an electric valve.
  • an outdoor unit needs to be connected to a plurality of indoor units. Therefore, a flow control valve is required to be installed on the refrigerant circuit of each indoor unit to cut off the refrigerant or adjust the flow rate.
  • the flow control valve is required to be able to adjust the flow rate of any opening degree, and the operation is stable. Moreover, since the flow control valve needs to be installed on the refrigerant circuit of each indoor unit, the flow control valve is also required to meet the requirements of volume miniaturization.
  • the electric valve is compact in structure and is advantageous in reducing the volume of the electric valve.
  • the electric valve disclosed in the present invention includes a valve body member including a valve body and a valve cover body, the valve cover body being fixed to an outer edge portion of the valve body; a valve seat member, the valve seat a component is fixed to the valve body; a valve core component, the valve core component is disposed in a cavity of the valve body; a transmission component, the transmission component includes a magnetic rotor, a screw rod and a nut, and the magnetic rotor is disposed on the The inner cavity of the valve cover body, the lead screw is screwed with the nut, the screw rod does not move axially with respect to the valve body; and the nut sleeve includes a nut rotation limit
  • the first restricting portion has a cross section that is non-circular.
  • the electric valve provided by the invention can make the structure of the electric valve compact, and is advantageous for reducing the volume of the electric valve.
  • Figure 1 is a schematic view showing the structure of an electric valve according to the present invention in a fully open state
  • Figure 2 is a schematic view showing the structure of the electric valve shown in Figure 1 in a closed state
  • Figure 3 is a schematic view showing the structure of a valve body member of the electric valve shown in Figure 1;
  • Figure 4 is a schematic view showing the structure of a valve seat member of the electric valve shown in Figure 1;
  • Figure 5 is a schematic view showing the structure of the transmission member of the electric valve shown in Figure 1;
  • Figure 6 is a schematic view showing the structure of a valve core member of the electric valve shown in Figure 1;
  • Figure 7 is a schematic view showing the structure of the valve core guiding member of the electric valve shown in Figure 1;
  • Figure 8 is a schematic view showing the structure of the nut set of the electric valve shown in Figure 1;
  • Figure 9 is a schematic view showing the structure of the valve seat body of the valve seat member shown in Figure 4.
  • Figure 10 is a schematic view showing the structure of the valve port sheath of the valve seat member shown in Figure 4;
  • Figure 11a/11b front and top views of another embodiment of a valve port sheath
  • Figure 12 is a schematic view showing the structure of another valve seat member according to the present invention.
  • Figure 13 is a schematic view showing the structure of another nut set according to the present invention.
  • Figure 14 is a schematic view showing the structure of a third nut set according to the present invention.
  • Figure 15 is a schematic view showing the structure of another electric valve provided by the present invention.
  • Figure 16 is a schematic view showing the structure of a third electric valve provided by the present invention.
  • Figure 17 is a schematic view showing the structure of a third valve seat member of the present invention.
  • FIG. 1 and FIG. 2 are schematic structural views of an electric valve according to the present invention in a closed valve and a valve open state
  • FIG. 3 is a schematic structural view of a valve body component of the electric valve
  • FIG. 4 is a valve seat component of the electric valve.
  • Schematic diagram of the structure Fig. 5 is a schematic structural view of the transmission component of the electric valve
  • Fig. 6 is a schematic structural view of the valve core component of the electric valve
  • Fig. 7 is a schematic structural view of the valve core guiding component of the electric valve
  • Fig. 8 is a nut kit of the electric valve Schematic diagram of the structure.
  • the electric valve includes a spool member 10, a valve seat member 20, a transmission member 30, a valve body member 40, a nut set 50, a spool guide member 60, and an electromagnetic coil 70.
  • the valve body member 40 includes a valve body 41 and a valve cover body 42.
  • the valve body 41 has a substantially cylindrical structure and is easily manufactured by a method such as pressing, pressing, rolling, or extrusion molding in a specific process, and includes an upper cylindrical portion 41a, a middle cylindrical portion 41b, and a lower cylindrical portion 41c.
  • FIGS. 1 and 2 the outer cylindrical portion 41a of the three tubular structure has the smallest outer diameter and the outer diameter of the lower cylindrical portion 41c is relatively largest. This arrangement facilitates the internal mounting function and External welding is added to make the structure more compact.
  • Figure 15 is a schematic view showing the structure of another electric valve provided by the present invention. It is also possible to adopt the technical solution disclosed in Fig. 15, in which the diameter of the outer edge of the intermediate tubular portion 41b and the lower tubular portion 41c coincide.
  • the radial joint 43 is welded and fixed to the lower cylindrical portion 41c of the valve body 41, and the radial joint 43 communicates with the inner chamber 416 of the valve body 41.
  • the valve cover body 42 is welded and fixed to the intermediate tubular portion 41b of the valve body 41, and the inner cavity 421 of the valve cover body 42 is formed between the valve body 41 and the valve cover body 42, and the upper cylindrical portion 41a of the valve body 41 extends into the valve cover body 42.
  • a communication hole 417 is formed in a wall portion of the upper cylindrical portion 41a of the valve body 41. The communication hole 417 communicates with the inner cavity 421 of the valve cover body 42 and the inner cavity 416 of the valve body 41.
  • the valve housing 42 may also be indirectly secured to the valve body 41 by a welded joint.
  • the welding means of the following other components may also adopt an indirect fixing method, which will not be described herein.
  • the valve seat member 20 includes a valve seat body 21, a valve seat core 22, and a valve port sheath 24.
  • Figure 9 is a schematic view showing the structure of the valve seat body of the valve seat member.
  • the valve seat body 21 has a substantially annular structure, and the inner wall thereof is provided with an upper step portion 211 having a stepped surface facing the upper end portion, and the valve seat core 22 is disposed on the upper step portion 211, and the inside of the valve seat core 22
  • the wall sleeve is provided with a valve port sheath 24.
  • the valve seat core 22 can be made of a non-metallic soft material to improve the sealing performance of the valve port.
  • the outer wall of the valve seat core 22 has a step portion, and a valve port pressing piece 25 is provided on the step portion, and the upper end portion of the valve seat body 21 has a boss portion 214.
  • the valve seat core 22 is attached to the step portion of the valve seat core 22 by the caulking and pressing portion 214.
  • Figure 17 is a schematic view showing the structure of a third valve seat member according to the present invention.
  • the inner edge surface of the upper step portion of the valve seat body 21B of the valve seat member 20B is a tapered surface 215 having a tapered diameter at the upper end
  • the valve seat core 22A is made of a plastic or rubber soft material, and the outer edge thereof abuts against the cone.
  • the surface (inner edge surface) 215 can also be fixed.
  • valve port sheath 24 is an annular thin-walled tubular member including a cylindrical portion 243 and a flange portion 244 formed by a flange, and the flange portion 244 abuts against the stepped surface of the lower step portion 212, and the shaft The flange portion 244 is abutted toward the end of the nozzle 23.
  • the axial joint 23 and the valve seat body 21 are fixed by welding.
  • valve port sheath 24 may have a two-body structure, that is, the tubular portion 243 and the flange portion 244 are fixedly connected by welding or the like.
  • the outer wall of the valve seat body 21 is provided with an outer step portion 213 whose step surface faces the lower end portion.
  • the lower end portion of the valve body 41 abuts against the stepped surface of the outer step portion 213 and is fixed by welding.
  • the components are compactly mounted, the mutual positional accuracy can be ensured, the process is simple, and the product reliability is strong.
  • the magnetic rotor of the transmission member is disposed in the inner cavity of the valve cover body, the screw rod extends from the end of the upper cylindrical portion of the valve body into the inner cavity of the valve body.
  • the magnetic rotor and the screw rod are axially fixed relative to the valve body 41, so that the relative position between the magnetic rotor and the coil component of the electric valve casing is fixed, and the driving force during the working process is fixed. Increased and relatively stable.
  • valve port sheath 24 is a schematic structural view of the valve port sheath of the valve seat member. As shown in FIG. 10, in the present embodiment, the cylindrical portion of the valve port sheath 24 is disposed at a position corresponding to the step surface of the upper step portion 211. There is a balance hole communicating with the inner cavity of the valve port sheath 24 as the balance passage 241.
  • This arrangement is beneficial in that during the operation of the electric valve, a part of the medium enters and remains between the bottom of the valve seat core 22 and the step surface of the upper step portion 211 of the valve seat body 21, and when the electric valve opens and closes the valve, it is possible
  • the abnormal fluctuation shock such as the instantaneous vaporization of the medium due to the instantaneous change of the pressure causes the soft valve seat core 22 to come off the valve seat body 21, causing product failure.
  • the purpose of the balance hole 241 is to maintain the medium at the bottom of the valve seat core 22 in communication with the inner cavity of the axial connection tube 23 (i.e., the valve chamber 418), which can avoid the above.
  • Figures 11a/11b are front and top views, respectively, of another embodiment of a valve port boot.
  • valve port sheath 24A is formed into an annular thin-walled member by crimping a thin metal plate, and the axially extending opening groove 242 formed at the butt joint of the metal thin plate serves as a balanced passage for the valve seat.
  • the medium at the bottom of the core 22 remains in communication with the interior of the axial nozzle 23. This structure is simpler and will not be described here.
  • valve port sheath is stamped into a cylindrical structure by a thin-walled metal material, and further extension of the technical solution can be made with reference to FIG. 12, and the valve port sheath 24C is directly on the inner wall of the valve seat body 21A. Processing and forming a unitary structure.
  • the upper step portion of the valve seat body 21A and the integral valve port sheath 24C together form an annular groove in which the valve seat core 22A is disposed.
  • an axial balance groove is formed between the valve seat core 22A and the step side wall of the valve seat body 21A, and the balance groove can also keep the medium at the bottom of the valve seat core 22A in communication with the upper portion. I will not repeat them here.
  • a vertical slot 221 can be formed in the inner edge portion of the valve seat core 22B, and the vertical slot 221 communicates with the step surface of the upper step portion, and can also function as a balance hole. . I will not repeat them here.
  • the transmission member 30 includes a lead screw 31, a nut 32, and a magnetic rotor 34.
  • the magnetic rotor 34 is disposed in the inner cavity of the valve cover body 42, and the lead screw 31 projects from the upper end portion of the valve body 41 into the inner cavity of the valve body 41 and engages with the nut 32.
  • the nut set 50 is fixed to the inner edge of the tubular portion 41a of the valve body 41 by pipe wall portion welding. (In contrast to this embodiment, in FIGS. 15 and 16, the nut set is fixed to the tubular body in the valve body by flat plate welding. The inner edge).
  • the nut set 50 is a thin metal tubular member that can be formed by sheet metal crimping.
  • four ribs 51 are formed by inwardly bending from the side walls of the thin-walled tubular member to form an axially extending rib 51.
  • the rib 51 serves as a first restricting portion, and the cross section of the first restricting portion is
  • the non-circular shape has an inner wall portion that engages with the outer edge portion of the nut 32, and can restrict the circumferential rotation of the nut 32 (it is understood that if only two ribs are provided, it can also serve as a limiting effect).
  • a bearing accommodating portion 53 is formed between the upper end surface of the rib 51 and the inner wall surface of the kit, and can serve as a accommodating portion of the bearing 33 that engages with the screw shaft 31.
  • the bearing 33 abuts on the upper end portion of the rib 51 to realize the bearing 33. Axial positioning.
  • the fixed bearing 33 is crimped at the upper end portion of the valve body 41.
  • the nut set 50 is a cylindrical kit made of sheet metal stamped crimp.
  • the nut set 50A is formed by a cylindrical sleeve made of sheet metal stamped and crimped, and the lower portion of the wall portion is punched inwardly to form an axially extending rib 51.
  • the upper portion of the pipe wall portion is punched inwardly to form a radial rib 57, and a region between the radial rib 57 and the inner wall surface of the nut set 50 can serve as a receiving portion of the bearing 33, and the radial rib 57 serves as The axial positioning portion of the bearing 33 and the lower end portion 52 of the nut set 50 serve as a second restricting portion that restricts the stroke of the axial movement of the valve body member 10.
  • the nut set 50B is made of a sheet metal stamped flange, and includes a cylindrical portion 55 and a flat plate portion 56 formed by bending the end portion of the cylindrical portion 55, the cylindrical portion including at least one axial flat portion 58. Since the flat section 58 is provided, the inner wall portion of the cylindrical portion engages with the outer edge portion of the nut 32 to restrict the circumferential rotation of the nut 32, and the flat plate portion 56 serves as the second restricting portion.
  • the flat plate portion 56 can be produced by punching and flanging, or can be produced by separately welding a circular ring.
  • the flat portion 56 of the nut set 50B is welded to the inner edge of the middle cylindrical portion of the valve body 41, so that the overall structure is simple.
  • the spool guiding member 60 includes a guide sleeve 61 and a seal assembly.
  • the guide sleeve 61 is welded and fixed to the inner edge of the intermediate tubular portion 41b of the valve body 41.
  • the inner wall of the guide sleeve 61 is provided with a step portion 611, and the seal assembly is crimped and fixed to the step portion 611 by the spacer 64.
  • the seal assembly includes a seal 63 made of a wear resistant material and an elastic member 62 made of a rubber material.
  • the nut set 50B can be formed by material injection molding.
  • the nut set includes a cylindrical portion and a flat portion, the cylindrical portion includes at least one axial flat portion, the flat portion is a first restricting portion, and the flat portion is a second restricting portion, and the cylindrical portion and the flat portion are integrally formed by material injection molding
  • the cylindrical portion and the flat portion are integrally formed.
  • Figure 16 is a schematic view showing the structure of a third electric valve provided by the present invention.
  • the seal assembly in this embodiment is fixed to the spool member 10A in comparison with the foregoing embodiment. Its role is the same, no longer repeat here
  • the spool member 10 is disposed in a lumen 416 of the valve body 41.
  • the spool member 10 includes a spool body 11 and a spool sleeve 12 (the spool body and the valve core sleeve may also be a one-piece molding structure).
  • the nut 32 is coupled to the valve sleeve 12 to drive the valve body 11 to move relative to the valve seat core 22 to effect opening/closing of the electric valve and flow rate adjustment.
  • the lower end portion 52 of the nut set 50 serves as a second restricting portion that restricts the spool member 10.
  • the nut 32 drives the valve sleeve 12 to move upward, the lower end portion 52 of the nut set can be abutted.
  • the non-self-locking screw connection is adopted between the screw rod and the nut, which is beneficial in that the valve core member 10 abuts and avoids hidden dangers such as jamming.
  • the inner wall 65 of the guide sleeve 61 is gap-fitted with the valve sleeve 12 as a wire surface, and the sealing member 62 abuts between the valve sleeve 12 and the guide sleeve 61.
  • the inner wall 65 of the guide sleeve 61 is in clearance fit with the outer wall of the valve sleeve 12.
  • the valve body 11 has a substantially cylindrical structure, the lower end is an annular valve core head 15, the valve core head 15 is engaged with the valve seat core 22, and the annular valve port sealing fit can make the valve core head under the premise of increasing the valve port circulation.
  • the abutment surface of the valve seat core 15 is small, which increases the flexibility of the valve core member 10. Especially suitable for commercial refrigeration systems.
  • the spool body 11 is also provided with an axially extending through hole 14 as a balancing passage, and a filter member 13 is disposed in the middle of the through hole 14.
  • a communication hole 417 is formed in a wall portion of the upper cylindrical portion 41a of the valve body 41. The through hole 14 and the communication hole 417 are combined to constitute a passage communicating with the inner cavity of the valve cover 42 and the valve chamber 418 (the space of the valve port communicating with the nozzle).
  • Step A10 processing a metal plate or metal pipe to prepare a cylindrical valve body 41;
  • the valve body 41 can be formed by metal sheet stretching or metal pipe stamping/rolling/pressing. (It should be noted that the metal sheet is processed into a cylindrical structure by a drawing process as a main process, and the metal pipe is processed. The pipe is processed into a cylindrical structure by stamping/rolling processing. In the specific processing process, the pressing/pressing/rolling/extruding and finishing processes are combined and processed, compared with metal cutting. Reduce processing costs and material costs).
  • the positioning step surface that engages with the valve seat member 20 and the positioning surface that engages with the valve cover body 42 are respectively machined on the outer edge of the valve body 41.
  • the above operation may preferably adopt a one-time clamping positioning, so that the relative position and the shape and position precision of each positioning step surface are ensured, and after the subsequent welding installation, the fitting precision of each component can be ensured, and the valve core component can be stably operated. Product reliability is improved and will not be described here.
  • the nut set 50 is welded and fixed to the inner edge of the valve body 41; the guide sleeve 61 of the valve core guide member 60 is welded and fixed to the inner edge of the cylindrical portion 41b of the valve body 41, and the seal assembly is attached to the guide sleeve 61.
  • the nut set 50 and the guide sleeve 61 are both welded to the valve body 41, the relative positional accuracy can be ensured. Therefore, the relative positional accuracy between the nut set 50, the guide sleeve 61 and the valve body 41 is further improved.
  • the nut set 50 and the guide sleeve 61 can also be welded to the valve body 41 in a one-time manner to avoid secondary heat affecting accuracy.
  • the nut 32 of the transmission member 30 is assembled with the valve core member 10, the assembled assembly is loaded into the inner cavity of the valve body 41 from the lower cylindrical portion of the valve body 41, and the nut 32 is screwed to the screw shaft 31; 32 cooperates with the first restricting portion 51 of the nut set 50 to cause the guide sleeve 61 to fit back into the valve core member 10, and the seal assembly elastically abuts against the outer edge of the valve core member 10.
  • the valve seat core 22 is mounted on the valve seat body 21, and the valve port sheath 24 is sleeved on the inner edge surface of the valve seat core 22, and the flange portion 244 of the valve port sheath 24 abuts against the lower step of the valve seat body 21.
  • the end portion of the axial connection tube 23 abuts against the flange portion 244, and the axial connection tube 23 and the valve seat body 21 are fixed by welding; the lower end portion of the valve body 41 is abutted against the outer step portion 213 of the valve seat body 21. , fixed by welding.
  • the above parts can be fixed by one-time welding of multiple parts, the process is simple, and the product reliability is strong.
  • valve body 41 of the valve cover body 42 is welded and fixed, and the magnetic rotor of the transmission member 30 is placed in the inner cavity of the valve cover body 42 after welding.
  • valve cover body 42 and the nut set are respectively welded to the valve body 41, the positional accuracy thereof is high, and the gap between the magnetic rotor and the inner wall surface of the valve cover body can be controlled to be small and compact.
  • the radial joint 43 is welded and fixed to the lower tubular portion 41c of the valve body 41.
  • An electromagnetic coil 70 is placed on the outer edge of the valve cover body 42 to fix the electromagnetic coil 70 to the holder 44.
  • Step A60 can be placed in the previous process without affecting the technical effects of the present invention; if the order of step A50 and step A40 is interchanged, etc., these changes should be within the scope of protection of the patent, and will not be described herein. .
  • the valve cover body is fixed to the outer edge portion of the valve body
  • the transmission component comprises a magnetic rotor, a screw rod and a nut
  • the magnetic rotor is disposed in the inner cavity of the valve cover body
  • the screw rod is screwed with the nut.
  • the screw rod does not move axially with respect to the valve body
  • the nut sleeve includes a first restricting portion that restricts the circumferential rotation of the nut.
  • the cross section of the first restricting portion is non-circular, so that the electric valve is compact in structure, which is advantageous for reducing the electric valve. volume.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

一种电动阀，包括阀体部件（40）、传动部件（30）、螺母套件（50），传动部件包括磁转子（34）、丝杆（31）及螺母（32），磁转子设于阀罩体（42）的内腔，丝杆与螺母螺纹连接，丝杆相对于阀本体（41）轴向不移动，螺母套件包括限制螺母周向转动的第一限制部（51），第一限制部的横截面为非圆形，其结构紧凑、利于减小电动阀的体积。

Description

一种电动阀
本申请要求2017年10月27日提交中国专利局、申请号为201711025591.8、发明名称为“一种电动阀”的发明专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及流体控制技术领域，具体涉及一种电动阀。
背景技术
在多联机等商用空调系统中，需要一个室外机联通多个室内机，所以每个室内机的冷媒回路上均需要安装流量控制阀，用于切断冷媒或调节流量大小。对流量控制阀的要求为能够调节任意开度流量，动作稳定，而且因为每个室内机的冷媒回路上均需安装该流量控制阀，所以还需要流量控制阀满足体积小型化的要求。
发明内容
本发明的目的是提供一种电动阀。该电动阀结构紧凑、利于减小电动阀的体积。
本发明所公开的电动阀包括阀体部件，所述阀体部件包括阀本体和阀罩体，所述阀罩体与所述阀本体的外缘部固接；阀座部件，所述阀座部件与所述阀本体固接；阀芯部件，所述阀芯部件设于所述阀本体的内腔；传动部件，所述传动部件包括磁转子、丝杆及螺母，所述磁转子设于所述阀罩体的内腔，所述丝杆与所述螺母螺纹连接，所述丝杆相对于所述阀本体轴向不移动；螺母套件，所述螺母套件包括限制所述螺母周向转动的第一限制部，所述第一限制部的横截面为非圆形。
本发明所提供的电动阀，能够使电动阀的结构紧凑，利于减小电动阀的体积。
附图说明
图1：本发明提供的一种电动阀在全开状态下的结构示意图；
图2：图1中所示的电动阀在的闭阀状态下结构示意图；
图3：图1中所示的电动阀的阀体部件的结构示意图；
图4：图1中所示的电动阀的阀座部件的结构示意图；
图5：图1中所示的电动阀的传动部件的结构示意图；
图6：图1中所示的电动阀的阀芯部件的结构示意图；
图7：图1中所示的电动阀的阀芯导向部件的结构示意图；
图8：图1中所示的电动阀的螺母套件的结构示意图；
图9：图4中所示的阀座部件的阀座体的结构示意图；
图10：图4中所示的阀座部件的阀口护套的结构示意图；
图11a/11b：阀口护套的另一种具体实施例的主视图及俯视图；
图12：本发明给出的另一种阀座部件的结构示意图；
图13：本发明给出的另一种螺母套件的结构示意图；
图14：本发明给出的第三种螺母套件的结构示意图；
图15：本发明提供的另一种电动阀的结构示意图；
图16：本发明提供的第三种电动阀的结构示意图；
图17：本发明给出的第三种阀座部件的结构示意图。
图1至图17中：
10/10A-阀芯部件；
11-阀芯体、12-阀芯套；
13-过滤件、14-平衡通道；
15-阀芯头；
20/20A/20B-阀座部件；
21/21A/21B-阀座体；
211-上台阶部、212-下台阶部；
213-外台阶部、214-凸起部；
215-锥面；
22/22A/22B-阀座芯、221-开槽；
23-轴向接管；
24/24A/24B/24C-阀口护套；
241-平衡孔/平衡通道；
243-筒部、244-凸缘部；
25-阀口压片；
30-传动部件；
31-丝杆、32-螺母；
33-轴承、34-磁转子；
40-阀体部件；
41-阀本体；
411-第一配合部、412-第二配合部；
413-第三配合部、414-第四配合部；
415-第五配合部、416-阀本体内腔；
417-连通孔、418-阀腔；
41a-上筒部、41b-中筒部、41c-下筒部；
42-阀罩体、421-阀罩体的内腔；
43-径向接管、44-支架；
50/50A/50B-螺母套件；
51-第一限制部、52-第二限制部；
53轴承容纳部、54-外缘部；
55-筒状部、56-平板部；
57-径向筋板、58-平面段；
60-阀芯导向部件；
61-导向套、611-台阶部；
62-弹性件、63-密封件、64-垫片；
65-导向面、70-电磁线圈。
具体实施方式
为了使本技术领域的人员更好地理解本发明方案，下面结合附图和具体实施方式对本发明作进一步的详细说明。
这里需要说明的是，本文中所涉及的上和下等方位词是以图1至图17中零部件位于图中及零部件相互之间的位置来定义的，只是为了表达技术方案的清楚及方便。应当理解，本文所采用的方位词不应限制本申请请求保护的范围。
图1和图2为本发明提供的一种电动阀分别在闭阀和开阀状态下的结构示意图，图3为电动阀的阀体部件的结构示意图，图4为电动阀的阀座部件的结构示意图，图5为电动阀的传动部件的结构示意图，图6为电动阀的阀芯部件的结构示意图，图7为电动阀的阀芯导向部件的结构示意图，图8为电动阀的螺母套件的结构示意图。
如图1、图2、图3、图4、图5、图6、图7及图8所示。电动阀包括阀芯部件10、阀座部件20、传动部件30、阀体部件40、螺母套件50、阀芯导向部件60及电磁线圈70。
阀体部件40包括阀本体41和阀罩体42。阀本体41大致为筒状结构，在具体加工过程中便于使用压制、冲压、滚压或挤压整型等方法制造，包括上筒部41a、中筒部41b及下筒部41c。
在图1和图2给出的实施例中，三个筒部结构的上筒部41a的外缘直径最小，下筒部41c的外缘直径相对最大，这种设置更加便于内部安装功能件及外部焊接安装另加，使结构更加紧凑。图15为本发明提供的另一种电动阀的结构示意图。也可以采用图15所公开的技术方案，中筒部41b与下筒部41c的外缘直径一致。
径向接管43焊接固定在阀本体41的下筒部41c，径向接管43与阀本体41的内腔416连通。阀罩体42焊接固定在阀本体41的中筒部41b，阀本体41与阀罩体42之间形成阀罩体42的内腔421，阀本体41的上筒部41a伸入阀罩体42的内腔421中。在阀本体41的上筒部41a的壁部开设有连通孔417，连通孔417连通阀罩体42的内腔421与阀本体41的内腔416。可以理解的是，阀罩体42也可以通过焊接接头间接的固定在阀本体41上。以下其他部件的焊接手段也可以采用间接的固定方法，在此不再赘述。
阀座部件20包括阀座体21、阀座芯22及阀口护套24。图9为阀座部件的阀座体的结构示意图。如图9所示，阀座体21大致为环状结构，其内 壁设有台阶面朝向上端部的上台阶部211，阀座芯22设置在上阶部211上，阀座芯22的内壁面套设有阀口护套24。
阀座芯22可以用非金属软性材料制成，提高阀口的密封性能。阀座芯22的外壁具有台阶部，在台阶部上设置有阀口压片25，阀座体21的上端部具有凸起部214。通过铆压凸起部214使阀口压片25抵接阀座芯22的台阶部，实现阀座芯22的安装。
图17为本发明给出的第三种阀座部件的结构示意图。在该实施例中，阀座部件20B的阀座体21B的上台阶部内缘面为上端直径渐小的锥面215，阀座芯22A为塑料或橡胶软性材料，其外缘抵接在锥面(内缘面)215，也可以实现固定。
阀座体21的内壁还设有台阶面朝向下端部的下台阶部212。在本实施例中，阀口护套24为环状薄壁筒件，包括筒部243和通过翻边形成的凸缘部244，凸缘部244抵接下台阶部212的台阶面，而轴向接管23的端部抵接凸缘部244。轴向接管23与阀座体21通过焊接固定。
作为进一步的技术方案，阀口护套24可以为两体结构，即筒部243与凸缘部244通过焊接等形式固定连接。
阀座体21的外壁设有台阶面朝向下端部的外台阶部213。作为优选方案，阀本体41的下端部抵接外台阶部213的台阶面并通过焊接固定。
上述结构中，各零件安装配合紧凑，相互位置精度可以保证，工序简单，产品可靠性强。由于传动部件的磁转子设置于阀罩体的内腔，丝杆从阀本体的上筒部的端部伸入所述阀本体的内腔。阀芯部件相对于阀座部件轴向移动过程中，磁转子、丝杆相对阀本体41轴向位置固定，使得磁转子与电动阀外套的线圈部件之间的相对位置固定，工作过程中驱动力提高并相对稳定。
图10为阀座部件的阀口护套的结构示意图，如图10所示，在本实施例中，阀口护套24的筒部在与上台阶部211的台阶面所对应的位置，设有与阀口护套24内腔连通的平衡孔作为平衡通道241。这种设置的有益之处于，电动阀工作过程中，阀座芯22底部与阀座体21的上阶部211的台阶面之间会进入并残存部分介质，当电动阀开闭阀时，可能因压力瞬间变化而发生介质瞬间汽化等异常波动冲击而导致软阀座芯22脱离阀座体21， 造成产品失效。开设平衡孔241的目的，可以使阀座芯22底部的介质保持与轴向接管23的内腔连通(即阀腔418)，可以避免上述情况发生。
图11a/11b分别为阀口护套另一种具体实施例的主视图及俯视图。
如图11a/11b所示。与上述实施例不同的是，阀口护套24A通过金属薄板卷边制成环状薄壁件，金属薄板卷边对接处形成的沿轴向贯通的开口槽242，作为平衡通道，使阀座芯22底部的介质保持与轴向接管23的内腔连通。这样结构更加简单，在此不再赘述。
在上述实施例中，阀口护套为薄壁金属材料冲压制成圆筒状结构，也可以参照图12进行技术方案的进一步延伸，阀口护套24C是在阀座体21A的内壁上直接加工成型形成一体结构。在该实施例中，阀座体21A的上台阶部与一体结构的阀口护套24C共同形成了环形槽，阀座芯22A设置在环形槽中。在该实施例中，阀座芯22A与阀座体21A的台阶侧壁之间开设有轴向平衡槽，该平衡槽也可以使阀座芯22A底部的介质保持与上部连通。在此不再赘述。
参照图17。在第三种阀座部件20B结构中，可以通过在阀座芯22B的内缘部开设竖向开槽221，竖向开槽221连通上台阶部的台阶面，也可以起到平衡孔的作用。在此不再赘述。
传动部件30包括丝杆31、螺母32及磁转子34。磁转子34设置于阀罩体42的内腔，丝杆31从阀本体41的上端部伸入阀本体41的内腔中并与螺母32配合。
螺母套件50通过管壁部焊接固接在阀本体41上筒部41a的内缘(区别于该实施例，在图15和图16中，螺母套件是通过平板部焊接固定在阀本体中筒部的内缘)。
参见图8。在本实施例中，螺母套件50为金属薄壁筒件，可以通过板材冲压卷边制成。本实施例中，具有4个从薄壁筒件的侧壁向内冲裁折弯形成轴向延伸的筋板51，筋板51作为第一限制部，所述第一限制部的横截面为非圆形，其内壁部与螺母32的外缘部配合，能够限制所述螺母32的周向转动(可以理解的是，如果只设置两个筋板也可以起到限制作用)。筋板51的上端面与套件的内壁面之间形成轴承容纳部53，可以作为与丝杆31配合的轴承33的容纳部，轴承33抵接设置在筋板51的上端部，实 现轴承33的轴向定位。在阀本体41的上端部铆压固定轴承33。
在上述实施例中，螺母套件50为金属板材冲压卷边制成的圆筒形套件。可以参照图13进行技术方案的进一步延伸，螺母套件50A通过金属板材冲压卷边制成的圆筒形套件，在管壁部的下段向内冲裁折弯形成轴向延伸的筋板51的同时，在管壁部的上段向内冲裁折弯形成径向筋板57，径向筋板57与螺母套件50的内壁面之间的区域可以作为轴承33的容纳部，径向筋板57作为轴承33的轴向定位部，螺母套件50的下端部52作为第二限制部，限制阀芯部件10轴向移动的行程。
同样，也可以参照图14进行技术方案进一步延伸。螺母套件50B为金属板材冲压翻边制成，包括筒形部55和由所述筒形部55的端部折弯形成的平板部56，筒形部至少包括一个轴向平面段58。由于有平面段58，所以筒形部的内壁部与螺母32的外缘部配合以限制螺母32的周向转动，平板部56作为第二限制部。该技术方案中平板部56可以通过冲压翻边方式制作，也可以通过另外焊接圆环件方式制作。
在该实施例中，通过螺母套件50B的平板部56与阀本体41的中筒部的内缘焊接，使整体结构简单。
在该实施例中，阀芯导向部件60包括导向套61和密封组件。导向套61焊接固定在阀本体41的中筒部41b的内缘。导向套61的内壁设有台阶部611，密封组件通过垫片64被铆压固定在台阶部611。密封组件包括耐磨性材料制成的密封件63和橡胶材料制成的弹性件62。
同样，也可以参照图14进行技术方案进一步延伸，螺母套件50B可以通过材料压注成型。螺母套件包括筒形部和平板部，筒形部包括至少一个轴向的平面段，平面段为第一限制部，平板部为第二限制部，筒形部与平板部通过材料压注一体成型，如通过金属材料精密铸造、或非金属材料注塑成型，使筒形部与平板部为一体成型结构。
图16为本发明提供的第三种电动阀的结构示意图。与前述方案比较，在该实施例中的密封组件是固定在阀芯部件10A上的。其所其的作用相同，在此不再赘述
阀芯部件10设置在阀本体41的内腔416中，阀芯部件10包括阀芯体11和阀芯套12(阀芯体和阀芯套也可以为一体材料成型结构)。螺母32 与阀芯套12连接，以驱动阀芯体11相对于阀座芯22移动，实现电动阀的启/闭及流量大小调节。
螺母套件50的下端部52作为限制阀芯部件10的第二限制部。螺母32带动阀芯套12向上移动过程中，可抵接螺母套件的下端部52。在大流量电动阀中，丝杆与螺母之间采用非自锁螺纹连接的方式，其有益之处在于，阀芯部件10抵接后，避免卡死等隐患。
导向套61的内壁65作为导线面与阀芯套12间隙配合，密封件62抵接在阀芯套12与导向套61之间。导向套61的内壁65与阀芯套12外壁之间间隙配合。
阀芯体11大致为圆柱状结构，下端为环形的阀芯头15，阀芯头15与阀座芯22配合，环状阀口密封配合可以在提高阀口流通量的前提下使阀芯头15与阀座芯22的抵接面较小，提高阀芯部件10的灵活性。尤其适用于商用制冷系统。
阀芯体11还开设有轴向贯穿的通孔14作为平衡通道，在通孔14中间还安置有过滤件13。阀本体41的上筒部41a的壁部开设有连通孔417。通孔14和连通孔417组合构成通道，连通阀罩体42的内腔与阀腔418(阀口连通接管的空间)。
结合上述具体例，一种上述结构的电动阀的制造方法介绍如下。
步骤A10：将金属板材或金属管材加工制备筒状阀本体41；
阀本体41可以通过金属板材拉伸制成或金属管材冲压/滚压/压制等方法制成(需要说明的是，金属板材是通过拉伸加工为主要工序将板材加工成筒状结构，金属管材是通过冲压/滚压加工为主要工序将管材加工成筒状结构，在具体加工过程中是将压制/冲压/滚压/挤压整型等工序组合运用加工的，相比较金属切削加工，可以降低加工成本及材料成本)。
通过金属切削方法，在阀本体41的外缘分别加工与阀座部件20配合的定位台阶面、及与阀罩体42配合的定位面。
上述操作可优选可采用一次性装夹定位，使各定位台阶面的相对位置和形位精度得到保证，在后续焊接安装后，各部件配合精度能够保证，能够使阀芯部件运行稳定性好，产品可靠性提高，在此不再赘述。
步骤A20：
将螺母套件50与阀本体41的内缘焊接固接；将阀芯导向部件60的导向套61与阀本体41中筒部41b的内缘焊接固定，密封组件安装到导向套61。
由于螺母套件50、导向套61都焊接在阀本体41上，所以相对位置精度可以保证。所以螺母套件50、导向套61与阀本体41之间相对位置精度进一步提高。优选地，螺母套件50和导向套61还可以采用一次性方法焊接在阀本体41，避免二次受热影响精度。
步骤A30：
将传动部件30的丝杆31从阀本体41上筒部41a的端部伸入阀本体41的内腔；
将传动部件30的螺母32与阀芯部件10组装，将组装好的组件从所述阀本体41的下筒部装入阀本体41的内腔，螺母32与述丝杆31螺纹连接；使螺母32与所述螺母套件50的第一限制部51配合，使导向套61与阀芯部件10间隙配合，密封组件弹性抵接阀芯部件10的外缘。
可以理解的是，由于螺母套件50、导向套61都焊接在阀本体41上，所以相对位置精度可以保证.。传动部件30与阀芯部件10安装精度比较高，使阀芯驱动平稳。
步骤A40：
将阀座芯22安装在阀座体21上，将阀口护套24套设在阀座芯22的内缘面，阀口护套24的凸缘部244抵接阀座体21的下台阶部212，轴向接管23的端部抵接凸缘部244，将轴向接管23与阀座体21通过焊接固定；将阀本体41的下端部与阀座体21的外台阶部213抵接，通过焊接固定。
可选地，以上零件可以通过多个零件一次性焊接方式固定，工序简单，产品可靠性强。
步骤A50：
将阀罩体42所述阀本体41焊接固定，焊接后所述传动部件30的磁转子设置于阀罩体42的内腔。
由于阀罩体42与螺母套件分别焊接在阀本体41上，所以其位置精度较高，磁转子与阀罩体的内壁面之间的间隙可以控制较小，结构紧凑。
步骤A60：
将径向接管43与阀本体41下筒部41c焊接固定。
步骤A70：
在阀罩体42外缘套设电磁线圈70，将电磁线圈70固定在固定架44上。
本领域的技术人员应该理解，基于本发明的技术思想，在上述技术方案的基础上，可以延伸多种装配顺序及装配变化。如步骤A60可以放置到前面的工序中，而不影响本发明的技术效果；如步骤A50与步骤A40步骤的顺序互换等，这些改变都应该在本专利的保护范围内，在此不再赘述。
以上结合具体实施例，对本发明所提供的电动阀进行了详细介绍。本发明所提供的电动阀，阀罩体与阀本体的外缘部固接，传动部件包括磁转子、丝杆及螺母，磁转子设于阀罩体的内腔，丝杆与螺母螺纹连接，丝杆相对于阀本体轴向不移动，螺母套件包括限制螺母周向转动的第一限制部，第一限制部的横截面为非圆形，使电动阀的结构紧凑，利于减小电动阀的体积。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。

Claims (14)

  1. 一种电动阀，包括
    阀体部件(40)，所述阀体部件(40)包括阀本体(41)和阀罩体(42)，所述阀罩体(42)与所述阀本体(41)的外缘部固接，；
    阀座部件(20)，所述阀座部件(40)与所述阀本体(41)固接；
    阀芯部件(10)，所述阀芯部件(10)设于所述阀本体(41)的内腔；
    传动部件(30)，所述传动部件(30)包括磁转子、丝杆及螺母，所述磁转子设于所述阀罩体(42)的内腔，所述丝杆与所述螺母螺纹连接，所述丝杆相对于所述阀本体(41)轴向不移动；
    螺母套件(50)，所述螺母套件(50)所述螺母套件(50)包括限制所述螺母周向转动的第一限制部，所述第一限制部的横截面为非圆形。
  2. 如权利要求1所述的电动阀，其特征在于，所述螺母套件(50)为金属薄壁筒件，包括两个或两个以上从所述薄壁筒件向内冲裁折弯形成的轴向筋板，所述轴向筋板作为所述第一限制部。
  3. 如权利要求2所述的电动阀，其特征在于，所述薄壁筒件的筒壁部与所述阀本体(41)的内缘固接，所述薄壁筒件的下端部为限制所述阀芯部件轴向移动行程的第二限制部。
  4. 如权利要求1所述的电动阀，其特征在于，所述螺母套件(50)包括筒形部和平板部，所述筒形部包括至少一个轴向平面段，所述轴向平面段为所述第一限制部，所述平板部为所述第二限制部，所述平板部与所述阀本体(41)的内缘固接。
  5. 如权利要求4所述的电动阀，其特征在于，所述筒形部的端部折弯形成平板部，或所述平板部与所述筒形部的筒部焊接固接。
  6. 如权利要求1所述的电动阀，其特征在于，所述螺母套件(50)包括筒形部和平板部，所述筒形部包括至少一个轴向的平面段，所述平面段为所述第一限制部，所述平板部为所述第二限制部，所述筒形部与平板部通过材料压注一体成型。
  7. 如权利要求1所述的电动阀，其特征在于，还包括与所述丝杆配合的轴承，所述螺母套件(50)设有容纳所述轴承的容纳部。
  8. 如权利要求7所述的电动阀，其特征在于，所述螺母套件(50)为 金属薄壁筒件，包括两个或两个以上从所述薄壁筒件向内冲裁折弯形成的轴向筋板，所述轴向筋板的上端部作为所述轴承的轴向定位部。
  9. 如权利要求7所述的电动阀，其特征在于，所述螺母套件(50)为金属薄壁筒件，包括两个或两个以上由所述薄壁筒件向内冲裁折弯形成的径向筋板，所述径向筋板作为所述轴承的轴向定位部。
  10. 如权利要求1所述的电动阀，其特征在于，所述丝杆与所述螺母之间为非自锁螺纹连接。
  11. 如权利要求1-10任一项所述的电动阀，其特征在于，所述阀本体(41)的上端部伸入所述阀罩体(42)的内腔，所述丝杆从所述阀本体(41)上端部伸入所述阀本体(41)的内腔并与所述螺母螺纹连接，所述螺母套件(50)与所述阀本体(41)内缘固接。
  12. 如权利要求1-10任一项所述的电动阀，其特征在于，所述阀本体(41)为金属材料一体滚压或拉伸成型，包括上筒部、中筒部及下筒部，所述上筒部的外缘直径小于所述中筒部的外缘直径，所述阀罩体(42)与所述阀本体(41)中筒部的外缘固接，所述阀本体(41)上筒部伸入所述阀罩体(42)的内腔。
  13. 如权利要求12所述的电动阀，其特征在于，还包括阀芯导向部件(60)，所述阀芯导向部件(60)包括导向套，所述导向套与所述阀本体(41)中筒部的内缘固接，并与所述阀芯部件(10)间隙配合。
  14. 如权利要求11所述的电动阀，其特征在于，所述阀座部件(40)包括阀座体和阀座芯，所述阀座体与所述阀本体(41)下端部固接，所述阀座芯外套于阀口护套。
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