CN114754150A - Electric combined valve - Google Patents

Electric combined valve Download PDF

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Publication number
CN114754150A
CN114754150A CN202210492645.6A CN202210492645A CN114754150A CN 114754150 A CN114754150 A CN 114754150A CN 202210492645 A CN202210492645 A CN 202210492645A CN 114754150 A CN114754150 A CN 114754150A
Authority
CN
China
Prior art keywords
valve
cavity
sealing
needle
assembly
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.)
Pending
Application number
CN202210492645.6A
Other languages
Chinese (zh)
Inventor
不公告发明人
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 Jiaming New Energy Equipment Co ltd
Original Assignee
Zhejiang Jiaming New Energy Equipment 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 Jiaming New Energy Equipment Co ltd filed Critical Zhejiang Jiaming New Energy Equipment Co ltd
Priority to CN202210492645.6A priority Critical patent/CN114754150A/en
Publication of CN114754150A publication Critical patent/CN114754150A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • 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
    • F16K1/02—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 with screw-spindle
    • 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
    • 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
    • F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
    • 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
    • F16K1/52—Means for additional adjustment of the rate of flow
    • 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
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • 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
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • 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
    • 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve
    • 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
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The invention relates to an electric combination valve, which comprises a valve body and a valve seat, wherein the valve body is provided with a first cavity and a second cavity; the valve core sealing part divides the mounting cavity into a third cavity and a fourth cavity up and down, and the side part of the valve seat is provided with a flow guide hole; the bottom of the fourth cavity is provided with a first valve port, and the valve core assembly is provided with a first sealing part matched with the first valve port; the valve core assembly comprises a valve core, the bottom of the valve core is provided with a second valve port, and a flow guide channel is also arranged on the valve core; the valve needle assembly penetrates through the valve core, a second sealing part matched with the second valve port is arranged on the valve needle assembly, a balance channel is arranged on the valve core along the axis direction of the valve core, and the third cavity and the second cavity are communicated with each other through the balance channel. The invention can realize bidirectional circulation and closing while realizing large flow and small flow regulation.

Description

Electric combined valve
Technical Field
The invention relates to the technical field of flow path control valves applied to automobile air-conditioning loops, in particular to an electric combination valve.
Background
In the existing heat pump air-conditioning system of the new energy automobile, a small-caliber expansion valve is generally adopted, and the small-caliber expansion valve only supports a small-flow working condition and cannot realize full-flow. Under the specific condition, the liquid flows through the stop valve to meet the use requirement of the full flow working condition.
In order to meet the flow requirements of a small-flow working condition and a full-flow working condition at the same time, the technology in the field provides a combined valve structure, for example, the chinese patent application with publication number CN113833867A discloses a large-port electronic expansion valve, which realizes the opening or closing of a large-flow valve port by sealing or opening a channel communicating a first cavity and a second cavity through a piston, and when the piston is connected with the channel in a sealing manner, the throttle channel on the piston can be sealed or opened through a valve needle assembly so as to realize the opening or closing of a small-flow valve port. However, when the valve works, the first cavity is communicated with the inner cavity of the shell, so that pressure difference exists between the top and the bottom of the piston and the valve needle assembly, when the valve flows forward from the first cavity to the second cavity, the top of the piston and the valve needle assembly is high-pressure and the bottom of the piston and the valve needle assembly is low-pressure, the larger the valve port drift diameter is, the larger the required force for opening the valve is, and the larger motor and power are required; when the flow is reversed, the top of the piston and the valve needle assembly is low pressure, the bottom of the piston and the valve needle assembly is high pressure, and the pressure difference can push the valve needle and the piston to move, so that the valve needle and the piston are uncontrollable, and therefore, the bidirectional control cannot be realized.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide an electric combination valve which can realize bidirectional circulation and closing while realizing large-flow and small-flow regulation.
In order to solve the technical problem, the invention provides an electric combination valve which comprises a valve body, wherein the valve body is provided with a mounting port, a first cavity and a second cavity which are communicated with each other, a valve seat is connected in the mounting port in a sealing manner, a mounting cavity is formed in the inner periphery of the valve seat, a valve core assembly penetrates through the mounting cavity in a sliding manner, and the outer periphery of the valve core assembly is connected with the inner periphery of the valve seat in a sealing manner through a valve core sealing part; the valve core sealing part divides the installation cavity into a third cavity and a fourth cavity up and down, a plurality of flow guide holes are formed in the side part of the valve seat, and the first cavity and the fourth cavity are communicated with each other through the flow guide holes; the bottom of the fourth cavity is provided with a first valve port communicated with the second cavity, and the valve core assembly is provided with a first sealing part matched with the first valve port; the valve core assembly comprises a valve core, a second valve port communicated with the second cavity is arranged at the bottom of the valve core, and a plurality of flow guide channels communicated with the fourth cavity are further arranged on the valve core; a valve needle assembly penetrates through the valve core, a second sealing part matched with the second valve port is arranged on the valve needle assembly, and the valve needle assembly and the valve core assembly can make reciprocating linear motion along the axis direction under the driving of an actuating mechanism, so that the valve body is switched among a cut-off state, a small flow conduction state and a large flow conduction state; when the valve body is in a cut-off state, the second sealing part is in sealing fit with the second valve port, and the first sealing part is in sealing fit with the first valve port; when the valve body is in a small-flow conduction state, the first sealing part is in sealing fit with the first valve port, and the second sealing part is separated from the second valve port, so that the second valve port is communicated with the flow guide channel; when the valve body is in a large-flow conduction state, the first sealing part is separated from the first valve port, so that the first valve port is communicated with the flow guide hole; and a plurality of balance channels are arranged on the valve core along the axis direction of the valve core, and the third cavity and the second cavity are communicated with each other through the balance channels.
According to the invention, the actuating mechanism can drive the valve needle assembly and the valve core assembly to move, so that the valve body is switched among the cut-off state, the small flow conduction state and the large flow conduction state, and the large flow and small flow regulation is realized. When the flow rate is in a small flow conduction state, the first valve port is closed, and fluid in the first cavity can flow into the second cavity through the flow guide hole, the fourth cavity, the flow guide channel and the second valve port in sequence; when the flow rate is in a conducting state, the first valve port and the second valve port are both opened, and the fluid in the first cavity can flow into the second cavity through the diversion hole, the fourth cavity and the first valve port in sequence. In addition, the balance channel is arranged on the valve core, the second cavity can be communicated with the third cavity, and the fluid in the second cavity can enter the third cavity through the balance channel. When the fluid flows from the first cavity to the second cavity in the positive direction, the second cavity is communicated with the third cavity, the pressures are low, the pressure difference is almost zero, and the acting force required by valve opening is favorably reduced; when the valve core assembly is reversely circulated, the second cavity is communicated with the third cavity, high pressure is applied, and pressure is balanced, so that the valve core assembly and the valve needle assembly cannot be pushed to move, the positions of the valve needle assembly and the valve core assembly can be accurately controlled by the executing mechanism, and bidirectional adjustment and bidirectional stop can be realized.
Preferably, the outer periphery of the valve needle assembly and the inner periphery of the valve core are in sealing connection through a valve needle sealing part, and the valve needle sealing part is located above the flow guide channel. The valve needle sealing part is designed to prevent the fluid in the first cavity from entering the third cavity from a gap between the valve needle assembly and the valve core.
Preferably, the valve core sealing part and the valve needle sealing part both comprise a sealing ring and a sealing ring which are arranged from inside to outside, the sealing ring and the sealing ring are coaxially arranged, a groove is formed in the periphery of the sealing ring, and one side, close to the sealing ring, of the sealing ring is embedded in the groove. The sealing ring is generally made of tetrafluoro copper powder or high-molecular polyethylene, and the sealing ring is a common O-shaped ring, so that the combined design can play a certain compensation role when the O-shaped ring is worn, the sealing effect is improved, and the lubricating effect is improved.
Preferably, the actuating mechanism comprises a coil assembly and a rotor assembly, the coil assembly is sleeved on the periphery of the rotor assembly, the rotor assembly comprises a shell, a magnetic rotor and a guide sleeve, the magnetic rotor and the guide sleeve are arranged in the shell, and the shell and the guide sleeve are both fixedly connected with the valve seat; the valve needle assembly further comprises a valve rod and a valve needle connected to the bottom of the valve rod, the second sealing part is arranged on the valve needle, and the valve needle sealing part is sleeved on the periphery of the valve needle; the upper portion periphery of valve rod with the interior internal peripheral thread connection of uide bushing, just the top of valve rod with magnetic rotor fixed connection, the magnetic rotor cover is established the periphery of uide bushing, and this magnetic rotor can rotate under the effect of coil assembly. The coil assembly is electrified to drive the magnetic rotor to rotate, so that the valve rod and the magnetic rotor synchronously rotate.
Preferably, the top of the valve core is provided with an opening, and the lower part of the valve rod penetrates through the opening; the valve core assembly also comprises a valve core sleeve which is covered on the top of the opening, and a gap is reserved between the inner periphery of the valve core sleeve and the outer periphery of the valve rod; the bottom of the valve core sleeve is provided with a first limiting part, the periphery of the valve needle assembly is provided with a second limiting part matched with the first limiting part, and the second limiting part is positioned below the first limiting part; a spool spring is compressed and abutted between the top of the spool assembly and the bottom of the guide sleeve; when the valve body is in a cut-off state, a distance is reserved between the first limiting part and the second limiting part, and when the valve body is in a large-flow conduction state, the first limiting part and the second limiting part are mutually abutted. In the upward movement process of the valve needle assembly, the second limiting part moves upward, and when the second limiting part moves to be abutted against the first limiting part, the valve core assembly can be driven to move upward synchronously to open the first valve port.
Preferably, the bottom of valve rod is provided with and holds the chamber, the upper portion of needle is worn to establish and should hold the intracavity, and is in hold the bottom opening part of chamber and install the needle cover, the upper portion periphery of needle be provided with the spacing step of needle cover top butt, and hold the intracavity and still be provided with the supporting shoe, this supporting shoe with compression butt has the needle spring between the needle, the top of supporting shoe with hold the roof butt of chamber. The valve needle spring is designed to apply an acting force to the valve needle, so that the second sealing part can be tightly abutted with the second valve port in a cut-off state to prevent internal leakage.
Preferably, the top of the equalization channel extends through the bottom wall of the opening. The fluid in the second cavity can flow into the third cavity through the balance channel, the opening and the gap between the valve core sleeve and the valve rod in sequence, so that the second cavity is communicated with the third cavity.
Preferably, a gap is reserved between the valve needle sleeve and the valve needle, and a plurality of through holes are formed in the side portion of the valve rod and communicated with the third cavity. The fluid in the second chamber can enter the accommodating chamber of the valve rod from the gap between the valve needle sleeve and the valve needle after entering the opening through the balance channel, and finally enter the third chamber from the through hole.
Preferably, the valve seat comprises an upper valve seat and a lower valve seat which are fixedly connected, and the lower valve seat is provided with the first valve port and the flow guide hole; the top and the bottom of the valve core sealing part are respectively and tightly abutted to the upper valve seat and the lower valve seat. By adopting the design, the valve core assembly is favorably guided, and the first valve port is convenient to open and close.
Preferably, a passage communicating the first cavity with the second cavity is formed in the valve body, the lower portion of the lower valve seat is connected in the passage in a sealing mode, and the flow guide hole is located above the passage.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of an electric combination valve according to an embodiment of the present invention;
FIG. 2 is a partial enlarged view A of FIG. 1;
FIG. 3 is a perspective view of a valve core assembly of an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a valve cartridge assembly of an embodiment of the present invention.
Reference numerals:
1-a valve body; 11-a mounting port; 12-a first cavity; 13-a second cavity; 14-a channel; 2-a valve seat; 21-a third cavity; 22-an upper valve seat; 23-lower valve seat; 231-flow guiding holes; 232-first valve port; 3-a valve core assembly; 31-a valve core; 311-a first seal; 312-a second valve port; 313-a flow guide channel; 314-an opening; 315 — balance channel; 32-valve core sleeve; 33-valve needle sealing part; 34-tabletting; 4-a valve core sealing part; 5-a valve needle assembly; 51-a valve stem; 511-a via; 52-a valve needle; 521-a limit step; 53-valve needle sleeve; 54-a support block; 55-a needle spring; 6-a coil assembly; 7-a rotor assembly; 71-a housing; 72-a magnetic rotor; 73-a guide sleeve; 8-valve core spring.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the present embodiment discloses an electric combination valve, which includes a valve body 1, wherein the valve body 1 is provided with a mounting port 11, a first cavity 12 and a second cavity 13, which are communicated with each other, a valve seat 2 is hermetically connected in the mounting port 11, a mounting cavity is formed in the inner periphery of the valve seat 2, a valve core assembly 3 is slidably inserted in the mounting cavity, and the outer periphery of the valve core assembly 3 is hermetically connected with the inner periphery of the valve seat 2 through a valve core sealing portion 4; the valve core sealing part 4 divides the installation cavity into a third cavity 21 and a fourth cavity up and down. In this embodiment, the valve seat 2 specifically includes an upper valve seat 22 and a lower valve seat 23 which are distributed vertically, the upper valve seat 22 and the lower valve seat 23 are welded and fixed after being butted, the upper valve seat 22 is screwed in the mounting opening 11, the top and the bottom of the valve core sealing portion 4 are respectively and tightly abutted against the upper valve seat 22 and the lower valve seat 23, and the periphery of the valve core sealing portion 4 is tightly abutted against the inner wall of the upper valve seat 22.
The valve body 1 is provided with a channel 14 communicating the first cavity 12 and the second cavity 13, and the lower part of the lower valve seat 23 is hermetically connected in the channel 14, specifically, an O-ring is embedded in the outer periphery of the lower part of the lower valve seat 23, and the lower valve seat 23 is hermetically connected with the inner wall of the channel 14 through the O-ring. In addition, a plurality of guide holes 231 are provided at a side of the lower valve seat 23, the first chamber 12 and the fourth chamber communicate with each other through the guide holes 231, and the guide holes 231 are located above the passages 14.
The bottom of the fourth chamber is provided with a first valve port 232 communicated with the second chamber 13. The valve core assembly 3 includes a valve core 31, a first sealing portion 311 is disposed at the bottom of the valve core 31 and is matched with the first valve port 232, the first sealing portion 311 is specifically a conical surface, a round angle is formed at the inner circumference of the top of the first valve port 232, an arc-shaped section matched with the first sealing portion 311 is formed, and the first sealing portion 311 is matched with the arc-shaped section, so that the first valve port 232 can be opened and closed.
The bottom of the valve core 31 is provided with a second valve port 312 communicating with the second chamber 13 along the axial direction thereof, the second valve port 312 and the first valve port 232 are coaxially arranged, and the valve core 31 is further provided with a plurality of fluid guide passages 313 communicating with the fourth chamber along the radial direction thereof. A valve needle assembly 5 is arranged in the valve core 31 in a penetrating manner, the valve needle assembly 5 comprises a valve rod 51 and a valve needle 52 connected to the bottom of the valve rod 51, the lower part of the valve needle 52 is provided with a second sealing part matched with the second valve port 312, specifically, the second sealing part is a conical surface, and the top of the inner periphery of the second valve port 312 is rounded off to form an arc-shaped surface matched with the conical surface of the valve needle 52.
The inner periphery of the valve element 31 is provided with an opening 314, a fixing groove, a sealing groove and a valve needle channel in sequence from top to bottom, a plurality of guide channels 313 penetrate through the side wall of the valve needle channel, and the sealing groove is positioned above the guide channels 313. The lower portion of the valve rod 51 is inserted into the opening 314, the valve core sleeve 32 is welded to the top of the opening 314, and a gap is left between the inner periphery of the valve core sleeve 32 and the outer periphery of the valve rod 51. The lower portion of the needle 52 is loosely fitted in the needle passage, a needle seal 33 is provided in the seal groove, the inner and outer peripheries of the needle seal 33 are respectively brought into close contact with the outer periphery of the needle 52 and the inner wall of the seal groove, and a presser piece 34 for restricting the position of the needle seal 33 to prevent the needle seal 33 from falling is weld-fixed in the fixing groove.
In this embodiment, the valve needle assembly 5 and the valve core assembly 3 can make reciprocating linear motion along the axis direction under the driving of the actuating mechanism, so that the valve body 1 is switched among a cut-off state, a small flow conduction state and a large flow conduction state; when the valve body 1 is in the cut-off state, the second sealing portion of the valve needle 52 is in sealing fit with the second valve port 312, and the first sealing portion 311 of the valve core 31 is in sealing fit with the first valve port 232, at this time, the first cavity 12 and the second cavity 13 are not communicated with each other; when the valve body 1 is in a small-flow conduction state, the first sealing portion 311 of the valve element 31 is in sealing fit with the first valve port 232, and the second sealing portion of the valve needle 52 is separated from the second valve port 312, so that the second valve port 312 is communicated with the flow guide channel 313, at this time, the first valve port 232 is closed, and the fluid in the first cavity 12 can flow into the second cavity 13 through the flow guide hole 231, the fourth cavity, the flow guide channel 313 and the second valve port 312 in sequence; when the valve body 1 is in a large flow communication state, the first sealing portion 311 of the valve element 31 is separated from the first valve port 232, so that the first valve port 232 is communicated with the diversion hole 231, at this time, the first valve port 232 and the second valve port 312 are both opened, and the fluid in the first cavity 12 can flow into the second cavity 13 through the diversion hole 231, the fourth cavity and the first valve port 232 in sequence.
Further, in the present embodiment, a plurality of balance passages 315 are provided on the valve core 31 along the axial direction thereof, the bottom of the balance passages 315 penetrates the bottom of the valve core 31, the top of the balance passages 315 penetrates the bottom wall of the opening 314, and the third cavity 21 and the second cavity 13 can communicate with each other through the balance passages 315. Specifically, fluid in the second cavity 13 may enter the opening 314 via the equalization channel 315 and enter the third cavity 21 via the gap between the spool sleeve 32 and the valve stem 51, such that the pressures in the second and third cavities 13, 21 are equalized. When the fluid flows from the first cavity 12 to the second cavity 13 in the forward direction, the second cavity 13 is communicated with the third cavity 21, and both the pressures are low and almost no pressure difference exists, so that the acting force required by valve opening is reduced; during reverse circulation, the second cavity 13 and the third cavity 21 are communicated and both have high pressure and balanced pressure, so that the valve core assembly 3 and the valve needle assembly 5 are not pushed to move, and the positions of the valve needle assembly 5 and the valve core assembly 3 can be accurately controlled by an actuating mechanism, so that bidirectional adjustment and bidirectional stop can be realized.
Specifically, the bottom of the valve rod 51 is provided with an accommodating cavity, the upper part of the valve needle 52 penetrates through the accommodating cavity, the valve needle sleeve 53 is welded and fixed at the opening of the bottom of the accommodating cavity, the periphery of the upper part of the valve needle 52 is provided with a limiting step 521 abutted against the top of the valve needle sleeve 53, and the limiting step 521 is matched with the valve needle sleeve 53 to prevent the valve needle 52 from falling out of the accommodating cavity; and a supporting block 54 is arranged in the accommodating cavity, a valve needle spring 55 is compressed and abutted between the supporting block 54 and the valve needle 52, and the top of the supporting block 54 is abutted with the top wall of the accommodating cavity. When the second sealing portion of the valve needle 52 is in sealing abutment with the second valve port 312, the valve needle spring 55 may apply a force to the valve needle 52 such that the second sealing portion can be in tight abutment with the second valve port 312, preventing internal leakage.
Further, a gap is left between the needle cover 53 and the needle 52, and the side of the valve rod 51 is provided with a plurality of through holes 511, and the through holes 511 communicate with the third cavity 21. The fluid in the second chamber 13 enters the opening 314 through the balance passage 315 and then enters the accommodating chamber of the valve rod 51 from the gap between the valve needle sleeve 53 and the valve needle 52 and finally enters the third chamber 21 from the through hole 511.
The actuator of the embodiment comprises a coil assembly 6 and a rotor assembly 7, wherein the coil assembly 6 is sleeved on the periphery of the rotor assembly 7, the rotor assembly 7 comprises a shell 71, and a magnetic rotor 72 and a guide sleeve 73 which are arranged inside the shell 71, and the shell 71 and the guide sleeve 73 are welded and fixed with the upper valve seat 22; the upper outer periphery of the valve rod 51 is in threaded connection with the inner periphery of the guide sleeve 73, the top of the valve rod 51 is fixedly welded with the magnetic rotor 72, and the magnetic rotor 72 is sleeved on the outer periphery of the guide sleeve 73. In this embodiment, the coil assembly 6 is powered on to drive the magnetic rotor 72 to rotate, so that the valve rod 51 and the magnetic rotor 72 rotate synchronously, and because the guide sleeve 73 is fixedly connected with the upper valve seat 22 and the valve rod 51 is in threaded connection with the guide sleeve 73, the valve rod 51 can move up and down in the axial direction thereof, and then the valve needle 52 is driven to move up and down, thereby realizing the conduction or the cutoff of the second valve port 312.
Furthermore, the bottom of the valve core sleeve 32 is provided with a first limit portion, the outer edge of the bottom of the valve needle sleeve 53 protrudes out of the outer periphery of the valve rod 51 to form a second limit portion, and the second limit portion is located below the first limit portion; when the valve body 1 is in a cut-off state, a distance is formed between the first limit part and the second limit part. When the actuating mechanism drives the valve needle assembly 5 to move upwards, the second limiting part synchronously moves upwards and gradually approaches the first limiting part, and the second valve port 312 is gradually opened in the process that the second limiting part approaches the first limiting part, so that the valve body 1 is in a small-flow conduction state; when the second limiting portion abuts against the first limiting portion, the valve needle assembly 5 continues to move upwards to drive the valve core assembly 3 to move upwards synchronously, and at the moment, the first valve port 232 is gradually opened, so that the valve body 1 is in a large-flow conduction state. In addition, the valve core spring 8 is compressed and abutted between the top of the valve core assembly 3 and the bottom of the guide sleeve 73, when the actuator drives the valve needle assembly 5 to move downwards, the valve core assembly 3 can be reset under the action of the valve core spring 8, and furthermore, the valve core spring 8 can apply acting force to the valve core 31, so that the first sealing part 311 of the valve core 31 is tightly abutted at the first valve port 232 to prevent internal leakage.
Further, the valve element sealing portion 4 and the valve needle sealing portion 33 of the present embodiment both include a sealing ring and a sealing ring disposed from inside to outside, the sealing ring and the sealing ring are coaxially disposed, a groove is disposed on the periphery of the sealing ring, and one side of the sealing ring close to the sealing ring is embedded in the groove. In this embodiment, the sealing ring adopts tetrafluoro copper powder or polymer polyethylene material, and the sealing washer then is ordinary O shape circle, and this kind of integrated design, when O shape circle wearing and tearing, the sealing ring can play certain compensation effect, improves sealed effect, is favorable to improving lubricated effect simultaneously.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, system, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, systems, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.

Claims (10)

1. The utility model provides an electronic combination valve, includes the valve body, is provided with installing port, first cavity and the second cavity of mutual intercommunication on this valve body, sealing connection has disk seat, its characterized in that in the installing port:
the inner periphery of the valve seat forms an installation cavity, a valve core assembly is slidably arranged in the installation cavity in a penetrating mode, and the outer periphery of the valve core assembly is connected with the inner periphery of the valve seat in a sealing mode through a valve core sealing portion; the valve core sealing part divides the installation cavity into a third cavity and a fourth cavity up and down, a plurality of flow guide holes are formed in the side part of the valve seat, and the first cavity and the fourth cavity are communicated with each other through the flow guide holes;
the bottom of the fourth cavity is provided with a first valve port communicated with the second cavity, and the valve core assembly is provided with a first sealing part matched with the first valve port;
the valve core assembly comprises a valve core, a second valve port communicated with the second cavity is arranged at the bottom of the valve core, and a plurality of flow guide channels communicated with the fourth cavity are further arranged on the valve core;
a valve needle assembly penetrates through the valve core, a second sealing part matched with the second valve port is arranged on the valve needle assembly, and the valve needle assembly and the valve core assembly can make reciprocating linear motion along the axis direction under the driving of an actuating mechanism, so that the valve body is switched among a cut-off state, a small flow conduction state and a large flow conduction state;
when the valve body is in a cut-off state, the second sealing part is in sealing fit with the second valve port, and the first sealing part is in sealing fit with the first valve port; when the valve body is in a small-flow conduction state, the first sealing part is in sealing fit with the first valve port, and the second sealing part is separated from the second valve port, so that the second valve port is communicated with the flow guide channel; when the valve body is in a large-flow conduction state, the first sealing part is separated from the first valve port, so that the first valve port is communicated with the flow guide hole;
and a plurality of balance channels are arranged on the valve core along the axis direction of the valve core, and the third cavity and the second cavity are communicated with each other through the balance channels.
2. An electrically operated combination valve according to claim 1, wherein:
the outer periphery of the valve needle assembly is connected with the inner periphery of the valve core in a sealing mode through a valve needle sealing portion, and the valve needle sealing portion is located above the flow guide channel.
3. An electrically operated combination valve according to claim 2, wherein:
the valve element sealing part and the valve needle sealing part respectively comprise a sealing ring and a sealing ring which are arranged from inside to outside, the sealing ring and the sealing ring are coaxially arranged, a groove is formed in the periphery of the sealing ring, and the sealing ring is close to one side of the sealing ring and is embedded in the groove.
4. An electrically operated combination valve according to claim 2, wherein:
the actuating mechanism comprises a coil assembly and a rotor assembly, the coil assembly is sleeved on the periphery of the rotor assembly, the rotor assembly comprises a shell, a magnetic rotor and a guide sleeve, the magnetic rotor and the guide sleeve are arranged in the shell, and the shell and the guide sleeve are fixedly connected with the valve seat;
the valve needle assembly further comprises a valve rod and a valve needle connected to the bottom of the valve rod, the second sealing part is arranged on the valve needle, and the valve needle sealing part is sleeved on the periphery of the valve needle; the upper portion periphery of valve rod with the interior internal peripheral thread connection of uide bushing, just the top of valve rod with magnetic rotor fixed connection, the magnetic rotor cover is established the periphery of uide bushing, and this magnetic rotor can rotate under the effect of coil assembly.
5. An electrically operated combination valve according to claim 4, wherein:
an opening is formed in the top of the valve core, and the lower portion of the valve rod penetrates through the opening;
the valve core assembly also comprises a valve core sleeve which is covered on the top of the opening, and a gap is reserved between the inner periphery of the valve core sleeve and the outer periphery of the valve rod;
the bottom of the valve core sleeve is provided with a first limiting part, the periphery of the valve needle assembly is provided with a second limiting part matched with the first limiting part, and the second limiting part is positioned below the first limiting part;
a spool spring is compressed against between the top of the spool assembly and the bottom of the guide sleeve;
when the valve body is in a cut-off state, a distance is reserved between the first limiting part and the second limiting part, and when the valve body is in a large-flow conduction state, the first limiting part and the second limiting part are mutually abutted.
6. An electrically operated combination valve according to claim 4, wherein:
the bottom of valve rod is provided with holds the chamber, the intracavity is held in this is worn to establish in the upper portion of needle, and is in the bottom opening part that holds the chamber installs the needle cover of valve, the upper portion periphery of needle be provided with the spacing step of needle cover top butt, just hold the intracavity and still be provided with the supporting shoe, this supporting shoe with compression butt has the needle spring between the needle, the top of supporting shoe with the roof butt that holds the chamber.
7. An electrically operated combination valve according to claim 5, wherein:
the top of the balance channel penetrates through the bottom wall of the opening.
8. An electrically operated combination valve according to claim 6, wherein:
a gap is reserved between the valve needle sleeve and the valve needle, and a plurality of through holes are formed in the side portion of the valve rod and communicated with the third cavity.
9. An electrically operated combination valve according to claim 1, wherein:
the valve seat comprises an upper valve seat and a lower valve seat which are fixedly connected, and the lower valve seat is provided with the first valve port and the flow guide hole;
the top and the bottom of the valve core sealing part are respectively and tightly abutted to the upper valve seat and the lower valve seat.
10. An electrically operated combination valve according to claim 9, wherein:
the valve body is provided with a channel communicated with the first cavity and the second cavity, the lower part of the lower valve seat is connected in the channel in a sealing manner, and the flow guide hole is positioned above the channel.
CN202210492645.6A 2022-05-07 2022-05-07 Electric combined valve Pending CN114754150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210492645.6A CN114754150A (en) 2022-05-07 2022-05-07 Electric combined valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210492645.6A CN114754150A (en) 2022-05-07 2022-05-07 Electric combined valve

Publications (1)

Publication Number Publication Date
CN114754150A true CN114754150A (en) 2022-07-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210492645.6A Pending CN114754150A (en) 2022-05-07 2022-05-07 Electric combined valve

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Country Link
CN (1) CN114754150A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024021828A1 (en) * 2022-07-27 2024-02-01 广东威灵电机制造有限公司 Electronic expansion valve, and refrigeration apparatus
WO2024125522A1 (en) * 2022-12-12 2024-06-20 浙江盾安人工环境股份有限公司 Electronic expansion valve and assembly method
WO2024125521A1 (en) * 2022-12-12 2024-06-20 浙江盾安人工环境股份有限公司 Electronic expansion valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024021828A1 (en) * 2022-07-27 2024-02-01 广东威灵电机制造有限公司 Electronic expansion valve, and refrigeration apparatus
WO2024125522A1 (en) * 2022-12-12 2024-06-20 浙江盾安人工环境股份有限公司 Electronic expansion valve and assembly method
WO2024125521A1 (en) * 2022-12-12 2024-06-20 浙江盾安人工环境股份有限公司 Electronic expansion valve

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