WO2021136022A1 - 电磁阀 - Google Patents

电磁阀 Download PDF

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Publication number
WO2021136022A1
WO2021136022A1 PCT/CN2020/138419 CN2020138419W WO2021136022A1 WO 2021136022 A1 WO2021136022 A1 WO 2021136022A1 CN 2020138419 W CN2020138419 W CN 2020138419W WO 2021136022 A1 WO2021136022 A1 WO 2021136022A1
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WO
WIPO (PCT)
Prior art keywords
piston
wall
valve
opening
gasket
Prior art date
Application number
PCT/CN2020/138419
Other languages
English (en)
French (fr)
Inventor
俞舟
Original Assignee
浙江盾安人工环境股份有限公司
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
Priority claimed from CN202010006882.8A external-priority patent/CN113074275B/zh
Priority claimed from CN202020015537.6U external-priority patent/CN211574378U/zh
Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Publication of WO2021136022A1 publication Critical patent/WO2021136022A1/zh

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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
    • F16K1/32—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
    • 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

Definitions

  • This application relates to the technical field of solenoid valves, and specifically to a solenoid valve.
  • the piston part of the solenoid valve is used to block the outlet of the solenoid valve, and a penetrating balance channel is provided in the piston part, and the on-off valve is relatively stable when the pressure difference is not large.
  • the balance channel of the solenoid valve and the flow capacity of the pilot valve port are related to the pressure.
  • the balance channel is on the high-pressure side and the pilot valve port is on the low-pressure side. When the pressure difference is high, the valve opens. Due to the throttling and pressure reduction effect of the balance channel, especially It is a gaseous environment, the gas is compressed, and the density is increased.
  • the flow capacity of the high-pressure environment is greater than that of the low-pressure environment, so the flow capacity is relatively high, so the flow capacity around the piston parts has a relatively enlarged trend, the pilot valve port The flow capacity has a relatively shrinking trend, which will cause the pressure in the upper cavity of the piston part to be higher, and the piston part cannot be opened.
  • the existing piston component is usually an integral structure, and the balance passage runs through the inside of the piston component.
  • the balance passage is not easy to process, which is not conducive to the compact structure and volume reduction of the solenoid valve.
  • the present application provides a solenoid valve to facilitate the installation of a balance channel in the solenoid valve.
  • a solenoid valve including: a valve body part having a containing cavity and an inlet and an outlet communicating with the containing cavity; a piston part movably arranged in the containing cavity, the piston part There is a balance channel.
  • the two ends of the balance channel are respectively a first opening and a second opening.
  • the first opening is located on the side of the piston member facing away from the outlet, and the second opening is in communication with the inlet;
  • the piston member has a closed position and an open position, the piston member In the closed position, the piston part blocks the outlet; when the piston part is in the open position, the piston part avoids the outlet and the inlet;
  • the piston part includes an outer piston and an inner piston structure arranged in the cavity of the outer piston, and the outer piston
  • the outer wall of the accommodating cavity is matched with the inner wall of the accommodating cavity
  • the inner piston structure has an inner balance hole and a first annular groove set around the outer wall of the inner piston structure
  • the outer piston has an outer balance hole, and the inner balance hole, the first annular groove and the outer balance hole are composed In the balance channel, the opening of the inner balance hole is the first opening, and the opening of the outer balance hole is the second opening.
  • the piston component further includes a first gasket, the first gasket is disposed between the outer piston and the inner piston structure, the end surface of the first gasket facing the outlet is an annular sealing surface, and the end of the outer piston is connected to the annular sealing surface.
  • the outer periphery is in position-limiting fit, and the end of the inner piston structure is in position-limiting fit with the inner periphery of the annular sealing surface.
  • the inner piston structure includes an inner piston and a gasket provided at the end of the inner piston, the inner piston and the outer piston are in position-limiting fit, the first sealing gasket is provided between the outer piston and the inner piston, and the gasket is connected to the annular sealing surface. Inner circumference limit fit.
  • the outer piston includes an outer cylinder and a first stop ring arranged at one end of the outer cylinder close to the outlet.
  • the outer wall of the outer cylinder is matched with the inner wall of the containing cavity;
  • the inner piston includes a first inner cylinder and The second inner cylinder, the outer diameter of the second inner cylinder is smaller than the outer diameter of the first inner cylinder, the first inner cylinder and the outer cylinder are in position-limiting fit, and the gasket is arranged on the second inner cylinder;
  • the gasket is located in the area surrounded by the outer cylinder, the first inner cylinder and the second inner cylinder.
  • the first limit ring is in a limit fit with the outer periphery of the annular sealing surface.
  • the end surface of the first inner cylinder is in contact with the first inner cylinder.
  • the side of the gasket facing away from the outlet abuts.
  • the inner wall of the outer piston has a first limit step
  • the outer wall of the inner piston has a second limit step
  • the first limit step is matched with the second limit step
  • the outer piston includes an outer cylinder and a second limit ring provided at one end of the outer cylinder away from the outlet, and the second limit ring is riveted with the inner piston.
  • the inner piston structure further includes: a second sealing gasket, the second sealing gasket is arranged at an end of the inner piston away from the outlet, the second sealing gasket has a pilot valve port, the pilot valve port is communicated with the through hole of the inner piston, and the inner piston The through hole communicates with the outlet.
  • the outer piston has a second annular groove arranged around the outer wall of the outer piston
  • the piston component further includes: an elastic ring arranged in the second annular groove, the side wall of the elastic ring has a gap, and the radial cross section of the elastic ring is Rectangular; the sealing ring is arranged in the second annular groove, the inner wall of the sealing ring abuts against the outer wall of the elastic ring, and the outer wall of the sealing ring abuts against the inner wall of the accommodating cavity.
  • the solenoid valve further includes: an auxiliary valve movably arranged in the balance passage, a preset gap is provided between the auxiliary valve and the inner wall of the balance passage, the auxiliary valve has a first state of blocking the first opening and a first state of avoiding the first opening. The second state of the opening.
  • the auxiliary valve includes: a first valve needle movably arranged in the balance passage, a preset gap is provided between the first valve needle and the inner wall of the balance passage, and the first valve needle is used to block the first opening;
  • the elastic member is arranged in the balance channel, and the elastic member cooperates with the first valve needle to apply a force to the first valve needle in a direction in which the first valve needle faces away from the first opening.
  • the inner balance hole has a first stop surface and a second stop surface spaced apart
  • the outer wall of the first valve needle has a third stop surface
  • one end of the elastic member abuts against the first stop surface
  • the other end of the elastic member abuts against the third stop surface
  • the second stop surface is used to limit the end of the first valve needle away from the first opening.
  • the piston component includes a main structure and a stopper detachably disposed on the main structure, a part of the inner balance hole is located on the main structure, another part of the inner balance hole is located on the stopper, and the first opening is located on the stopper; In the radial direction of the first valve needle, the size of the stopper is larger than the size of the first valve needle.
  • the piston component includes an outer piston and an inner piston structure, the inner piston structure has an inner balance hole and a first annular groove arranged around the outer wall of the inner piston structure, and the outer piston has an outer balance hole, an inner balance hole, and a first annular groove It forms a balance channel with the external balance hole. That is to say, in this method, the piston component is set as a separate structure, and different holes or grooves are respectively processed to form a balance channel, which facilitates the formation of a balance channel, so that the piston component can be made with a smaller size and a compact structure, which is beneficial to reduce The volume of the small solenoid valve.
  • the first sealing gasket has a pre-tightening force inside and outside, the rigidity of the sealing gasket is greatly improved.
  • the valve is opened under a high pressure difference, when the piston component receives an upward force, the inner piston and the outer piston are riveted into one body, and at the same time, the first gasket is driven to move upward, so that the gasket is not easily deformed, and the gap between the gasket and the piston is improved.
  • the connection strength can further reduce internal leakage and increase the service life of the solenoid valve.
  • Figure 1 shows a schematic structural diagram of a solenoid valve provided in the first embodiment of the present invention
  • FIG. 2 shows a schematic diagram of the structure of the piston component in FIG. 1;
  • FIG. 3 shows a schematic diagram of the structure of the elastic ring in FIG. 1;
  • Fig. 4 shows a schematic structural view of the valve cover part in Fig. 1;
  • FIG. 5 shows a schematic diagram of the structure of the valve needle component in FIG. 1;
  • Fig. 6 shows a schematic structural diagram of a solenoid valve provided in the second embodiment of the present application
  • FIG. 7 shows a schematic diagram of the structure of the piston component in FIG. 6;
  • Fig. 8 shows a partial enlarged view of the auxiliary valve and the balance passage in Fig. 7.
  • Valve body parts 11, inlet; 12, outlet; 13, valve seat parts; 14, valve cover parts; 15, suction parts; 16, casing; 17, valve cover; 18, first spring; 20, outer Piston; 21, outer cylinder; 22, first limit ring; 23, first limit step; 24, second limit ring; 25, outer balance hole; 26, second annular groove; 27, second opening 31, the first gasket; 32, the gasket; 33, the second gasket; 34, the pilot valve port; 35, the elastic ring; 36, the sealing ring; 37, the stopper, 40, the inner piston, 41, the first Inner cylinder; 42, second inner cylinder; 43, second limit step; 44, inner balance hole; 45, first annular groove; 46, first opening; 50, valve needle part; 51, core iron; 52. Second valve needle; 53, second spring; 54, washer; 60, auxiliary valve; 61, preset gap; 62, first valve needle, 63, elastic member.
  • the first embodiment of the present application provides a solenoid valve, including: a valve body part 10 having a containing cavity and an inlet 11 and an outlet 12 communicating with the containing cavity; a piston part , Movably arranged in the accommodating cavity, the piston component has a balance channel, the two ends of the balance channel are respectively a first opening 46 and a second opening 27, the first opening 46 is located on the side of the piston component away from the outlet 12, the second The opening 27 is in communication with the inlet 11; the piston part has a closed position and an open position.
  • the piston component includes an outer piston 20 and an inner piston structure arranged in the cavity of the outer piston 20.
  • the outer wall of the outer piston 20 is matched with the inner wall of the accommodating cavity.
  • the inner piston structure has an inner balance hole 44 and a structure surrounding the outer wall of the inner piston structure.
  • the first annular groove 45, the outer piston 20 has an outer balance hole 25, the inner balance hole 44, the first annular groove 45 and the outer balance hole 25 constitute a balance channel, the opening of the inner balance hole 44 is the first opening 46, and the outer balance hole 25 The opening is the second opening 27.
  • the piston component includes an outer piston 20 and an inner piston structure.
  • the inner piston structure has an inner balance hole 44 and a first annular groove 45 arranged around the outer wall of the inner piston structure.
  • the outer piston 20 has an outer balance hole 25 and an inner balance hole. 44.
  • the first annular groove 45 and the outer balance hole 25 form a balance channel. That is to say, in this method, the piston component is set as a separate structure, and different holes or grooves are respectively processed to form a balance channel, which facilitates the formation of a balance channel, so that the piston component can be made with a smaller size and a compact structure, which is beneficial to reduce The volume of the small solenoid valve.
  • the inner piston structure may only include the inner piston 40, the inner piston 40 has an inner balance hole 44 and a first annular groove 45 arranged around the outer wall of the inner piston 40.
  • the inner piston structure includes the inner piston 40 and other structures.
  • the direction of the first annular groove 45 is parallel to the axial direction of the inner balance hole 44, and the axial direction of the outer balance hole 25 is perpendicular to the axial direction of the inner balance hole 44, so that the flow direction of the fluid in the balance channel can be changed.
  • the piston part of the solenoid valve is used to block the outlet of the solenoid valve.
  • the valve is opened, the inner circumference of the ring gasket in the piston part is subjected to upward force, and the outer circumference is subjected to downward pressure, which will cause the gasket to deform. , Especially for high-pressure occasions, the gasket is severely deformed, which leads to failure of the piston components and poor sealing.
  • the piston component further includes a first gasket 31, the first gasket 31 is arranged between the outer piston 20 and the inner piston structure, the end surface of the first gasket 31 facing the outlet 12 is an annular sealing surface, and the outer piston The end of 20 is in position-limiting fit with the outer periphery of the annular sealing surface, and the end of the inner piston structure is in position-limiting fit with the inner periphery of the annular sealing surface.
  • both the outer and inner peripheral edges of the annular sealing surface of the first gasket 31 can be restricted and supported by the end of the outer piston 20 and the end of the inner piston structure, which improves the first gasket 31 Therefore, even if the valve is opened under a high pressure difference, the first gasket 31 is not easily deformed, which improves the reliability and service life.
  • the inner piston structure includes an inner piston 40 and a gasket 32 provided at the end of the inner piston 40.
  • the inner piston 40 is in positional fit with the outer piston 20, and the first gasket 31 is provided on the outer piston 20 and the inner piston.
  • the gasket 32 is in position-limiting fit with the inner peripheral edge of the annular sealing surface. In this way, the contact area with the inner peripheral edge of the annular sealing surface can be increased by the gasket 32, thereby improving the limiting effect.
  • the outer piston 20 includes an outer cylinder 21 and a first stop ring 22 provided at one end of the outer cylinder 21 close to the outlet 12.
  • the outer wall of the outer cylinder 21 matches the inner wall of the accommodating cavity;
  • the inner piston 40 includes an interconnection The first inner cylinder 41 and the second inner cylinder 42, the outer diameter of the second inner cylinder 42 is smaller than the outer diameter of the first inner cylinder 41, and the first inner cylinder 41 and the outer cylinder 21 are in positional fit,
  • the gasket 32 is arranged on the second inner cylinder 42; the first sealing gasket 31 is located in the area surrounded by the outer cylinder 21, the first inner cylinder 41 and the second inner cylinder 42, and the first stop ring 22 is connected to the The outer periphery of the annular sealing surface is in position-limiting fit, and the end surface of the first inner cylinder 41 abuts on the side of the first sealing gasket 31 facing away from the outlet 12.
  • the two end surfaces and the two annular surfaces of the first sealing gasket 31 can be supported and limited, and the outer and inner peripheral edges of the annular sealing surface can be limited, and the first sealing gasket 31 can be added.
  • the deformation resistance of the first gasket 31 is avoided, thereby avoiding the deformation of the first gasket 31.
  • the second inner cylinder 42 has a limit step that fits with the spacer 32 in a limit position, and the second inner cylinder 42 is riveted with the spacer 32.
  • the second inner cylinder 42 and the spacer are realized. 32 reliable connections.
  • the inner wall of the outer piston 20 has a first limiting step 23, and the outer wall of the inner piston 40 has a second limiting step 43, and the first limiting step 23 is matched with the second limiting step 43.
  • the outer piston 20 includes an outer cylinder 21 and a second limit ring 24 disposed at an end of the outer cylinder 21 away from the outlet 12, and the second limit ring 24 is riveted with the inner piston 40.
  • the inner piston structure further includes: a second gasket 33, the second gasket 33 is provided at an end of the inner piston 40 away from the outlet 12, the second gasket 33 has a pilot valve port 34, and a pilot valve port 34 It communicates with the through hole of the inner piston 40, and the through hole of the inner piston 40 communicates with the outlet 12.
  • the second sealing gasket 33 is in a position-limiting fit with the inner piston 40 through a limit step, and an end of the inner piston 40 away from the outlet is riveted with the second sealing gasket 33.
  • the outer piston 20 has a second annular groove 26 arranged around the outer wall of the outer piston 20.
  • the piston component further includes: an elastic ring 35 arranged in the second annular groove 26.
  • the side wall of the elastic ring 35 has Notch, the radial cross-section of the elastic ring 35 is rectangular; the sealing ring 36 is arranged in the second annular groove 26, the inner wall of the sealing ring 36 is in contact with the outer wall of the elastic ring 35, and the outer wall of the sealing ring 36 is in contact with the inner wall of the accommodating cavity Pick up.
  • the sealing ring 36 can be supported by the elastic ring 35, so that the sealing ring 36 has a tendency to expand outward, so that the outer wall of the sealing ring 36 closely fits with the inner wall of the accommodating cavity, thereby improving the sealing performance and reducing the leakage of the piston component.
  • the cross-section of the elastic ring 35 is rectangular, which can greatly save radial space, reduce installation difficulty, increase the tension of the seal ring 36, and reduce leakage around the piston components.
  • the valve body part 10 includes a valve seat part 13 and a valve cover part 14 which are connected to each other.
  • the accommodating cavity, the inlet 11 and the outlet 12 are all located in the valve seat part 13, and the solenoid valve also includes a valve needle part 50, a valve needle
  • the part 50 is movably arranged in the valve cover part 14, and the valve needle part 50 is matched with the piston part. Dividing the valve body part 10 into two parts, the valve seat part 13 and the valve cover part 14, facilitates manufacturing and assembly. Through the cooperation of the valve cover member 14 and the valve needle member 50, the valve needle member 50 can block or avoid the pilot valve port 34 on the second sealing gasket 33 of the piston member, so as to realize the opening or closing of the solenoid valve.
  • the valve cover member 14 includes a sleeve 16, an attracting member 15 provided in the sleeve 16, and a valve cover 17 connected to the sleeve 16.
  • the valve cover 17 is connected to the valve seat member 13, and the valve cover 17 has a counter piston The end face of the component being restricted.
  • the sleeve 16 is also provided with a first spring 18, and both ends of the first spring 18 are matched with the suction member 15 and the valve needle member 50 respectively.
  • the valve needle component 50 includes a core iron 51, a second valve needle 52, a second spring 53 and a washer 54.
  • the core iron 51 is movably arranged in the sleeve 16, and the second valve needle 52 is arranged in the core iron 51.
  • the valve needle 52 is used to block the pilot valve port, the gasket 54 is fixedly connected to the core iron 51, the second spring 53 is sleeved on the second valve needle 52, one end of the second spring 53 abuts the second valve needle 52, and the second spring 53 abuts against the second valve needle 52. The other end of the spring 53 is in contact with the washer 54.
  • the inner piston 40 is riveted with the first gasket 31 and the gasket 32 first, and then forms the inner piston structure with the second gasket 33.
  • the inner piston structure is assembled with the outer piston 20. Since the inner piston 40 and the outer piston 20 have positioning surfaces, they are positioned by the metal positioning surface, and then riveted. After riveting, the inner piston 40 and the outer piston 20 can be fixed. The inner piston 40 is riveted. When the positioning surface with the outer piston 20 is squeezed, the first sealing gasket 31 and the outer piston 20 can be in slight contact or a certain small gap can be left. Depending on the accuracy, the outer end surface of the first sealing gasket 31 will not be excessively squeezed.
  • the inner piston 40 and the outer piston 20 are riveted, the first gasket 31 will not be squeezed and deformed, which can ensure the flatness of the first gasket 31 and improve internal leakage.
  • the inner piston 40 and the outer piston 20 have sufficient connection rigidity to ensure the consistency of the overall movement of the piston components and the connection strength.
  • the piston part is provided with a second sealing gasket 33, and the second sealing gasket 33 is provided with a pilot valve port 34.
  • the pilot valve port may not be provided on the piston part.
  • the valve port is independently arranged in other parts.
  • the inner and outer balance holes are not provided, and the valve closing ability is improved by increasing the damping of the outer piston and increasing the spring force of the core iron.
  • increasing the elastic force of the elastic ring 35 can increase the damping of the piston component.
  • valve cover member 14 is welded by the valve cover 17, the sleeve 16, and the suction member 15.
  • the valve cover 17 is provided with a limiting surface for limiting the piston member, and the valve cover 17 is provided with a valve seat On the positioning surface where the component 13 is positioned, the valve cover 17 and the valve seat component 13 are hermetically welded on the positioning surface.
  • the valve needle component 50 is composed of a core iron 51, a second valve needle 52, and a second spring 53, and the core iron 51 does not need to overcome the pressure difference force at the beginning of the high-pressure valve opening, and overcomes the pressure of the second spring 53 and the first spring 18.
  • the elastic force is sufficient.
  • the second valve needle 52 is driven to move. At this time, the electromagnetic force is relatively large.
  • the second valve needle 52 is under the action of the second spring 53 Continue to move upward to ensure the opening of the pilot valve.
  • the rigidity of the sealing gasket is greatly improved.
  • the valve is opened under a high pressure difference, when the piston component receives an upward force, the inner piston 40 and the outer piston 20 are riveted into one body, and at the same time, the first gasket 31 is driven to move upward, so that the gasket is not easily deformed, and the gasket and the piston are lifted.
  • the strength of the connection further, can reduce internal leakage and increase the life of the solenoid valve.
  • the solenoid valve further includes an auxiliary valve 60, which is movably arranged in the balance passage, and the auxiliary valve 60 is connected to the balance passage.
  • the auxiliary valve 60 has a first state of blocking the first opening 46 and a second state of avoiding the first opening 46.
  • the auxiliary valve 60 is located in the inner balance hole 44.
  • the auxiliary valve 60 is in the second state at low pressure, the balance channel participates in the flow, and the valve can be normally opened and closed.
  • the auxiliary valve 60 blocks the balance passage under the pressure of the pressure difference force.
  • the balance passage does not participate in the flow, and the piston component only leaks from the gap between the inner wall of the accommodating cavity, so that the valve is easier to open.
  • the valve is normally opened under high pressure.
  • the pressure difference between the front and rear of the valve is reduced.
  • the auxiliary valve 60 will be pushed open, and the balance channel will participate in the circulation again, which helps to close the valve. Therefore, this solution can solve the problem that the solenoid valve is not easy to open in a high-pressure environment.
  • the flow capacity has a relatively shrinking trend, which will cause the pressure in the upper cavity of the piston component to be higher, which will cause the relatively low pressure piston component to be more difficult to open under high pressure, and the pilot valve will open and the piston component will not open.
  • the flow capacity of the pilot valve is insufficient, the product whose main valve can be opened normally under low pressure may not be able to open under high pressure.
  • the auxiliary valve 60 includes: a first valve needle 62, which is movably arranged in the balance passage, a preset gap 61 is provided between the first valve needle 62 and the inner wall of the balance passage, and the first valve needle 62 is used for The first opening 46 is blocked; the elastic member 63 is arranged in the balance channel, and the elastic member 63 cooperates with the first valve needle 62 to apply the first valve needle 62 in the direction away from the first opening 46 Force.
  • the cross-sectional area of the preset gap 61 is larger than the area of the first opening 46. In this way, when the auxiliary valve 60 is in the second state, the first opening 46 is opened, which can prevent the auxiliary valve 60 from obstructing fluid flow.
  • the balance channel (specifically, the inner balance hole 44) has a first stop surface and a second stop surface arranged at intervals, and the outer wall of the first valve needle 62 has a third stop surface, which is elastic One end of the member 63 is in contact with the first stop surface, and the other end of the elastic member 63 is in contact with the third stop surface.
  • the second stop surface is used to limit the end of the first valve needle 62 away from the first opening 46. Bit. In this way, the movement range of the first valve needle 62 can be restricted by the second stopper, and it is convenient for the elastic member 63 to apply elastic force to the first valve needle 62.
  • the piston component includes a main structure and a stopper 37 detachably disposed on the main structure.
  • a part of the balance channel (specifically, the inner balance hole 44) is located on the main structure, and another part of the balance channel is located on the block.
  • the first opening 46 is located on the stop 37; in the radial direction of the first valve needle 62, the size of the stop 37 is larger than the size of the first valve needle 62.
  • the above arrangement can facilitate the disassembly and assembly of the auxiliary valve 60.
  • the stop 37 is not installed first, and the auxiliary valve 60 is installed in the balance channel before the stop 37 is installed.
  • the main structure of the piston component can be understood as a general term for other structures of the piston component except the stopper 37.
  • the piston component includes an outer piston 20 and an inner piston 40 arranged in the cavity of the outer piston 20.
  • the outer wall of the outer piston 20 is matched with the inner wall of the accommodating cavity.
  • the inner piston 40 has an inner balance hole 44 and a surrounding inner piston 40.
  • a first annular groove 45 is provided on the outer wall of the outer piston 20, and the outer piston 20 has an outer balance hole 25.
  • the inner balance hole 44, the first annular groove 45 and the outer balance hole 25 form a balance passage.
  • the auxiliary valve 60 is located in the inner balance hole 44, and the inner balance
  • the opening of the hole 44 is the first opening 46
  • the opening of the outer balance hole 25 is the second opening 27. This can facilitate the processing of the balance channel, and can reduce the weight of the piston component.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

一种电磁阀，其包括阀体部件(10)和活塞部件，活塞部件可移动地设置在容纳腔内，活塞部件具有关闭位置和打开位置，活塞部件处于关闭位置的情况下，活塞部件封堵出口(12)；活塞部件处于打开位置的情况下，活塞部件避让出口(12)和入口(11)；其中，活塞部件包括外活塞(20)和设置在外活塞(20)的腔体内的内活塞结构，外活塞(20)的外壁与容纳腔的内壁配合，内活塞结构具有内平衡孔(44)以及环绕内活塞结构的外壁设置的第一环形槽(45)，外活塞(20)具有外平衡孔(25)，内平衡孔(44)、第一环形槽(45)和外平衡孔(25)组成平衡通道，内平衡孔(44)的开口为第一开口(46)，外平衡孔(25)的开口为第二开口(27)。该活塞部件为分体结构，便于形成平衡通道，使得活塞部件尺寸较小，结构紧凑，从而有利于减小电磁阀的体积。

Description

电磁阀 技术领域
本申请涉及电磁阀技术领域，具体而言，涉及一种电磁阀。
背景技术
电磁阀的活塞部件用于封堵电磁阀的出口，活塞部件内设置有贯穿的平衡通道，对于压差不大的情况，其开关阀较稳定。电磁阀的平衡通道与导阀口的流通能力与所处压力相关，平衡通道处于高压侧，导阀口处于低压侧，当压差较高时开阀，由于平衡通道节流降压作用，尤其是气态环境，气体被压缩，密度提高，在同样的压差下，高压环境的流通能力大于低压环境的流通能力，因此流通能力较高，这样活塞部件周边流通能力有相对放大趋势，导阀口流通能力有相对缩小趋势，会导致活塞部件上腔压力偏高，出现活塞部件不能开启的情况。
现有的活塞部件通常为一体结构，在其内部贯穿平衡通道，但若活塞部件的尺寸较小，则平衡通道不易加工，这不利于电磁阀实现紧凑的结构减小体积。
发明内容
本申请提供了一种电磁阀，以便于电磁阀中设置平衡通道。
为了实现上述目的，本申请提供了一种电磁阀，包括：阀体部件，阀体部件具有容纳腔以及与容纳腔连通的入口、出口；活塞部件，可移动地设置在容纳腔内，活塞部件具有平衡通道，平衡通道的两端分别为第一开口和第二开口，第一开口位于活塞部件的背离出口的一侧，第二开口与入口连通；活塞部件具有关闭位置和打开位置，活塞部件处于关闭位置的情况下，活塞部件封堵出口；活塞部件处于打开位置的情况下，活塞部件避让出口和入口；其中，活塞部件包括外活塞和设置在外活塞的腔体内的内活塞结构，外活塞的外壁与容纳腔的内壁配合，内活塞结构具有内平衡孔以及环绕内活塞结构的外壁设置的第一环形槽，外活塞具有外平衡孔，内平衡孔、第一环形槽和外平衡孔组成平衡通道，内平衡孔的开口为第一开口，外平衡孔的开口为第二开口。
进一步地，活塞部件还包括第一密封垫，第一密封垫设置在外活塞和内活塞结构之间，第一密封垫的朝向出口的端面为环形密封面，外活塞的端部与环形密封面的外周缘限位配合，内活塞结构的端部与环形密封面的内周缘限位配合。
进一步地，内活塞结构包括内活塞和设置在内活塞的端部的垫片，内活塞与外活塞限位配合，第一密封垫设置在外活塞和内活塞之间，垫片与环形密封面的内周缘限位配合。
进一步地，外活塞包括外筒体和设置在外筒体的靠近出口的一端的第一限位环，外筒体的外壁与容纳腔的内壁配合；内活塞包括相互连接的第一内筒体和第二内筒体，第二内筒体 的外径小于第一内筒体的外径，第一内筒体与外筒体限位配合，垫片设置在第二内筒体上；第一密封垫位于外筒体、第一内筒体和第二内筒体围绕形成的区域内，第一限位环与环形密封面的外周缘限位配合，第一内筒体的端面与第一密封垫的背离出口的一侧抵接。
进一步地，外活塞的内壁具有第一限位台阶，内活塞的外壁上具有第二限位台阶，第一限位台阶与第二限位台阶配合。
进一步地，外活塞包括外筒体和设置在外筒体的远离出口的一端的第二限位环，第二限位环与内活塞铆接。
进一步地，内活塞结构还包括：第二密封垫，第二密封垫设置在内活塞的远离出口的一端，第二密封垫具有导阀口，导阀口与内活塞的通孔连通，内活塞的通孔与出口连通。
进一步地，外活塞具有环绕外活塞的外壁设置的第二环形槽，活塞部件还包括：弹性环，设置在第二环形槽内，弹性环的侧壁上具有缺口，弹性环的径向截面为矩形；密封环，设置在第二环形槽内，密封环的内壁与弹性环的外壁抵接，密封环的外壁与容纳腔的内壁抵接。
进一步地，电磁阀还包括：辅助阀，可移动地设置在平衡通道内，辅助阀与平衡通道的内壁之间具有预设间隙，辅助阀具有封堵第一开口的第一状态以及避让第一开口的第二状态。
进一步地，辅助阀包括：第一阀针，可移动地设置在平衡通道内，第一阀针与平衡通道的内壁之间具有预设间隙，第一阀针用于封堵第一开口；弹性件，设置在平衡通道内，弹性件与第一阀针配合，以沿第一阀针背离第一开口的方向对第一阀针施加作用力。
进一步地，内平衡孔内具有间隔设置的第一止挡面和第二止挡面，第一阀针的外壁上具有第三止挡面，弹性件的一端与第一止挡面抵接，弹性件的另一端与第三止挡面抵接，第二止挡面用于对第一阀针的远离第一开口的一端限位。
进一步地，活塞部件包括主体结构和可拆卸地设置在主体结构上的挡块，内平衡孔的一部分位于主体结构上，内平衡孔的另一部分位于挡块上，第一开口位于挡块上；在第一阀针的径向上，挡块的尺寸大于第一阀针的尺寸。
采用该方案，活塞部件包括外活塞和内活塞结构，内活塞结构具有内平衡孔以及环绕内活塞结构的外壁设置的第一环形槽，外活塞具有外平衡孔，内平衡孔、第一环形槽和外平衡孔组成平衡通道。即该法方案将活塞部件设置为了分体结构，并且分别加工出了不同的孔或槽组成平衡通道，这样便于形成平衡通道，使得活塞部件能够做的尺寸较小，结构紧凑，从而有利于减小电磁阀的体积。
而且，由于第一密封垫内外侧都有预紧力，大大提高了密封垫的刚度。在高压差下开阀时，当活塞部件受向上的力时，内活塞和外活塞铆接为一体，同时带动第一密封垫向上运动，使密封垫不易变形，提升了密封垫与活塞之间的连接强度，进一步地，可降低内漏，提升电磁阀寿命。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了本实用新型的实施例一提供的电磁阀的结构示意图；
图2示出了图1中的活塞部件的结构示意图；
图3示出了图1中的弹性环的结构示意图；
图4示出了图1中的阀盖部件的结构示意图；
图5示出了图1中的阀针部件的结构示意图；
图6示出了本申请的实施例二提供的电磁阀的结构示意图；
图7示出了图6中的活塞部件的结构示意图；
图8示出了图7中的辅助阀和平衡通道的局部放大图。
其中，上述附图包括以下附图标记：
10、阀体部件；11、入口；12、出口；13、阀座部件；14、阀盖部件；15、吸引件；16、套管；17、阀盖；18、第一弹簧；20、外活塞；21、外筒体；22、第一限位环；23、第一限位台阶；24、第二限位环；25、外平衡孔；26、第二环形槽；27、第二开口；31、第一密封垫；32、垫片；33、第二密封垫；34、导阀口；35、弹性环；36、密封环；37、挡块；40、内活塞；41、第一内筒体；42、第二内筒体；43、第二限位台阶；44、内平衡孔；45、第一环形槽；46、第一开口；50、阀针部件；51、芯铁；52、第二阀针；53、第二弹簧；54、垫圈；60、辅助阀；61、预设间隙；62、第一阀针；63、弹性件。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1至图5所示，本申请的实施例一提供了一种电磁阀，包括：阀体部件10，阀体部件10具有容纳腔以及与容纳腔连通的入口11、出口12；活塞部件，可移动地设置在容纳腔内，活塞部件具有平衡通道，平衡通道的两端分别为第一开口46和第二开口27，第一开口46位于活塞部件的背离出口12的一侧，第二开口27与入口11连通；活塞部件具有关闭位置和打开位置，活塞部件处于关闭位置的情况下，活塞部件封堵出口12；活塞部件处于打开位置的情况下，活塞部件避让出口12和入口11；其中，活塞部件包括外活塞20和设置在外活塞20 的腔体内的内活塞结构，外活塞20的外壁与容纳腔的内壁配合，内活塞结构具有内平衡孔44以及环绕内活塞结构的外壁设置的第一环形槽45，外活塞20具有外平衡孔25，内平衡孔44、第一环形槽45和外平衡孔25组成平衡通道，内平衡孔44的开口为第一开口46，外平衡孔25的开口为第二开口27。
采用该方案，活塞部件包括外活塞20和内活塞结构，内活塞结构具有内平衡孔44以及环绕内活塞结构的外壁设置的第一环形槽45，外活塞20具有外平衡孔25，内平衡孔44、第一环形槽45和外平衡孔25组成平衡通道。即该法方案将活塞部件设置为了分体结构，并且分别加工出了不同的孔或槽组成平衡通道，这样便于形成平衡通道，使得活塞部件能够做的尺寸较小，结构紧凑，从而有利于减小电磁阀的体积。
其中，内活塞结构可以只包括内活塞40，内活塞40具有内平衡孔44以及环绕内活塞40的外壁设置的第一环形槽45。或者，内活塞结构包括内活塞40及其他结构。
可选地，第一环形槽45的朝向和内平衡孔44的轴向平行，外平衡孔25的轴向和内平衡孔44的轴向垂直，这样可改变流体在平衡通道内的流动方向。
现有技术中，电磁阀的活塞部件用于封堵电磁阀的出口，在开阀时，活塞部件中的环形密封垫内周受向上的力，外周受向下的压力，会导致密封垫变形，尤其对于高压场合，密封垫变形严重，从而导致活塞部件失效，密封不良。
在本实施例中，活塞部件还包括第一密封垫31，第一密封垫31设置在外活塞20和内活塞结构之间，第一密封垫31的朝向出口12的端面为环形密封面，外活塞20的端部与环形密封面的外周缘限位配合，内活塞结构的端部与环形密封面的内周缘限位配合。采用上述方案，通过外活塞20的端部和内活塞结构的端部可对第一密封垫31的环形密封面的外周缘和内周缘均进行限位和支撑，这样提高了第一密封垫31的刚度和抗压能力，所以即使在高压差下开阀，第一密封垫31也不易变形，提高了可靠性和使用寿命。
在本实施例中，内活塞结构包括内活塞40和设置在内活塞40的端部的垫片32，内活塞40与外活塞20限位配合，第一密封垫31设置在外活塞20和内活塞40之间，垫片32与环形密封面的内周缘限位配合。这样可通过垫片32增加与环形密封面的内周缘的接触面积，从而提高限位效果。
具体地，外活塞20包括外筒体21和设置在外筒体21的靠近出口12的一端的第一限位环22，外筒体21的外壁与容纳腔的内壁配合；内活塞40包括相互连接的第一内筒体41和第二内筒体42，第二内筒体42的外径小于第一内筒体41的外径，第一内筒体41与外筒体21限位配合，垫片32设置在第二内筒体42上；第一密封垫31位于外筒体21、第一内筒体41和第二内筒体42围绕形成的区域内，第一限位环22与环形密封面的外周缘限位配合，第一内筒体41的端面与第一密封垫31的背离出口12的一侧抵接。通过上述设置，可以对第一密封垫31的两个端面和两个环形面均进行支撑和限位，而且对环形密封面的外周缘和内周缘均进行限位，增加了第一密封垫31的抗变形能力，从而避免了第一密封垫31变形。
可选地，第二内筒体42具有与垫片32限位配合的限位台阶，第二内筒体42与垫片32铆接，采用上述方式，实现了第二内筒体42与垫片32的可靠连接。
在本实施例中，外活塞20的内壁具有第一限位台阶23，内活塞40的外壁上具有第二限位台阶43，第一限位台阶23与第二限位台阶43配合。通过上述设置，实现了外活塞20与内活塞40的精确定位，并且在装配时可避免挤压第一密封垫31。
在本实施例中，外活塞20包括外筒体21和设置在外筒体21的远离出口12的一端的第二限位环24，第二限位环24与内活塞40铆接。通过上述设置，实现了外活塞20与内活塞40的可靠连接，并且铆接的方式便于操作。
在本实施例中，内活塞结构还包括：第二密封垫33，第二密封垫33设置在内活塞40的远离出口12的一端，第二密封垫33具有导阀口34，导阀口34与内活塞40的通孔连通，内活塞40的通孔与出口12连通。可选地，第二密封垫33通过限位台阶与内活塞40限位配合，内活塞40的远离出口的一端与第二密封垫33铆接。通过上述设置可实现第二密封垫33与内活塞40的可靠连接。
在本实施例中，外活塞20具有环绕外活塞20的外壁设置的第二环形槽26，活塞部件还包括：弹性环35，设置在第二环形槽26内，弹性环35的侧壁上具有缺口，弹性环35的径向截面为矩形；密封环36，设置在第二环形槽26内，密封环36的内壁与弹性环35的外壁抵接，密封环36的外壁与容纳腔的内壁抵接。这样可通过弹性环35支撑密封环36，使密封环36有向外张开的趋势，从而密封环36的外壁与容纳腔的内壁紧密配合，从而可以提高密封性，减少活塞部件的泄漏。而且，弹性环35的截面为矩形，可大大节省径向空间，降低安装难度，提升密封环36张紧力，降低活塞部件周围泄漏。
在本实施例中，阀体部件10包括相互连接的阀座部件13和阀盖部件14，容纳腔、入口11和出口12均位于阀座部件13，电磁阀还包括阀针部件50，阀针部件50可移动地设置在阀盖部件14内，阀针部件50与活塞部件配合。将阀体部件10分为阀座部件13和阀盖部件14两部分便于制造和装配。通过阀盖部件14和阀针部件50的配合可使阀针部件50封堵或避让活塞部件的第二密封垫33上的导阀口34，以便于实现电磁阀的打开或关闭。
具体地，阀盖部件14包括套管16、设置在套管16内的吸引件15以及与套管16连接的阀盖17，阀盖17与阀座部件13连接，阀盖17上具有对活塞部件进行限位的端面。套管16内还设置有第一弹簧18，第一弹簧18的两端分别与吸引件15和阀针部件50配合。阀针部件50包括芯铁51、第二阀针52、第二弹簧53和垫圈54，芯铁51可移动地设置在套管16内，第二阀针52设置在芯铁51内，第二阀针52用于封堵导阀口，垫圈54与芯铁51固定连接，第二弹簧53套在第二阀针52上，第二弹簧53的一端与第二阀针52抵接，第二弹簧53的另一端与垫圈54抵接。
在生产时，内活塞40先与第一密封垫31、垫片32铆接，然后与第二密封垫33组成内活塞结构。内活塞结构再与外活塞20装配，由于内活塞40与外活塞20有定位面，靠金属定位面接触定位，然后进行铆接，铆接后可固定内活塞40和外活塞20，铆接时内活塞40和外活 塞20定位面受挤压，第一密封垫31与外活塞20可轻微接触也可留一定小间隙，由精度决定，不使第一密封垫31外端面受过度挤压。因此在内活塞40和外活塞20铆接时第一密封垫31不产生挤压变形，可以保证第一密封垫31的平整度，改善内漏。同时内活塞40和外活塞20有足够的连接刚度，确保活塞部件整体动作的一致性和连接强度。
在本实施例中，活塞部件内设有第二密封垫33，第二密封垫33上设有导阀口34，对于非直线型先导式结构，也可不在活塞部件上设导阀口，导阀口独立设置于其它部位。
在另一种未图示出的方案中，不设内外平衡孔，通过增加外活塞阻尼和增加芯铁弹簧力的方式改善关阀能力。例如，增加弹性环35的弹力可增加活塞部件的阻尼。
可选地，阀盖部件14由阀盖17、套管16、吸引件15焊接而成，阀盖17上设有对活塞部件进行限位的限位面，且阀盖17设有对阀座部件13进行定位的定位面，在定位面处阀盖17与阀座部件13密封焊接。
可选地，阀针部件50由芯铁51、第二阀针52、第二弹簧53组成，高压开阀开始时芯铁51无需克服压差力，克服第二弹簧53和第一弹簧18的弹力即可，当芯铁51运动到一定距离后，带动第二阀针52运动，此时电磁力较大，当芯铁51完全吸合后，第二阀针52在第二弹簧53作用下继续向上运动，确保导阀开度。
通过上述方案，由于第一密封垫31内外侧都有预紧力，大大提高了密封垫的刚度。在高压差下开阀时，当活塞部件受向上的力时，内活塞40和外活塞20铆接为一体，同时带动第一密封垫31向上运动，使密封垫不易变形，提升了密封垫与活塞之间的连接强度，进一步地，可降低内漏，提升电磁阀寿命。
如图6至图8所示，在实施例二中，与上述实施例不同的是，电磁阀还包括辅助阀60，辅助阀60可移动地设置在平衡通道内，辅助阀60与平衡通道的内壁之间具有预设间隙61，辅助阀60具有封堵第一开口46的第一状态以及避让第一开口46的第二状态。具体地，辅助阀60位于内平衡孔44中。
采用该方案，低压时辅助阀60处于第二状态，平衡通道参与流通，阀可正常开闭。当在预定高压下开阀时，辅助阀60在压差力推动下封堵平衡通道，此时平衡通道不参与流通，活塞部件只有与容纳腔内壁的间隙泄漏，这样开阀更容易，从而实现在高压下正常开阀，当阀开启后，阀前后压差降低，此时辅助阀60将被顶开，平衡通道又参与流通，此时有助于关阀。因此该方案可解决电磁阀在高压环境下不易开启的问题。
高压下不易开阀的原因分析：气体是可压缩的，高压下密度较大，同样的节流口，在同样的压差下，高压环境的流通能力大于低压环境的流通能力。在高压差下开阀时，活塞部件下端为高压，活塞部件上端为中压，导阀口进口为中压，导阀口出口为低压，因此活塞部件周边流通能力有相对放大趋势，导阀口流通能力有相对缩小趋势，会导致活塞部件上腔压力偏高，从而导致高压下相对低压活塞部件更不容易开启，会出现导阀开启活塞部件未开启的 情况。当导阀流通能力余量不足时，在低压下主阀能正常打开的产品可能在高压下会无法开阀。
本方案解决了电磁阀在气态高压状态下开阀不稳定的难题，非常适合跨临界CO 2系统的实际应用，阀内部完全为气态介质，甚至是超临界介质，在关阀后压差很高，开阀瞬间通过活塞部件内的辅助阀的作用，适时的开闭第一开口，可以解决高压差下开关阀的可靠性问题，提升电磁阀的动作可靠性。
在本实施例中，辅助阀60包括：第一阀针62，可移动地设置在平衡通道内，第一阀针62与平衡通道的内壁之间具有预设间隙61，第一阀针62用于封堵第一开口46；弹性件63，设置在平衡通道内，弹性件63与第一阀针62配合，以沿第一阀针62背离第一开口46的方向对第一阀针62施加作用力。通过上述设置，在高压开阀时，第一阀针62两端的压差大于预设值时，压差力使弹性件63压缩，第一阀针62封堵住第一开口46，以实现在高压下正常开阀。在本实施例中，在第一阀针62的径向上，预设间隙61的截面积大于第一开口46的面积。这样当辅助阀60处于第二状态时，第一开口46打开，可避免辅助阀60阻碍流体流动。
在本实施例中，平衡通道内(具体可为内平衡孔44)具有间隔设置的第一止挡面和第二止挡面，第一阀针62的外壁上具有第三止挡面，弹性件63的一端与第一止挡面抵接，弹性件63的另一端与第三止挡面抵接，第二止挡面用于对第一阀针62的远离第一开口46的一端限位。这样可通过第二止挡面对第一阀针62的移动范围进行限制，而且便于弹性件63对第一阀针62施加弹力。
在本实施例中，活塞部件包括主体结构和可拆卸地设置在主体结构上的挡块37，平衡通道(具体可为内平衡孔44)的一部分位于主体结构上，平衡通道的另一部分位于挡块37上，第一开口46位于挡块37上；在第一阀针62的径向上，挡块37的尺寸大于第一阀针62的尺寸。通过上述设置可便于辅助阀60的拆装，在装配辅助阀60时，先不安装挡块37，将辅助阀60装入平衡通道后再安装挡块37。在本实施例中，活塞部件的主体结构可理解为活塞部件的除挡块37之外的其他结构的总称。
在本实施例中，活塞部件包括外活塞20和设置在外活塞20的腔体内的内活塞40，外活塞20的外壁与容纳腔的内壁配合，内活塞40具有内平衡孔44以及环绕内活塞40的外壁设置的第一环形槽45，外活塞20具有外平衡孔25，内平衡孔44、第一环形槽45和外平衡孔25组成平衡通道，辅助阀60位于内平衡孔44中，内平衡孔44的开口为第一开口46，外平衡孔25的开口为第二开口27。这样可便于平衡通道的加工，并且可以减轻活塞部件的重量。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (12)

  1. 一种电磁阀，其特征在于，包括：
    阀体部件(10)，所述阀体部件(10)具有容纳腔以及与所述容纳腔连通的入口(11)、出口(12)；
    活塞部件，可移动地设置在所述容纳腔内，所述活塞部件具有平衡通道，所述平衡通道的两端分别为第一开口(46)和第二开口(27)，所述第一开口(46)位于所述活塞部件的背离所述出口(12)的一侧，所述第二开口(27)与所述入口(11)连通；所述活塞部件具有关闭位置和打开位置，所述活塞部件处于所述关闭位置的情况下，所述活塞部件封堵所述出口(12)；所述活塞部件处于所述打开位置的情况下，所述活塞部件避让所述出口(12)和所述入口(11)；
    其中，所述活塞部件包括外活塞(20)和设置在所述外活塞(20)的腔体内的内活塞结构，所述外活塞(20)的外壁与所述容纳腔的内壁配合，所述内活塞结构具有内平衡孔(44)以及环绕所述内活塞结构的外壁设置的第一环形槽(45)，所述外活塞(20)具有外平衡孔(25)，所述内平衡孔(44)、所述第一环形槽(45)和所述外平衡孔(25)组成所述平衡通道，所述内平衡孔(44)的开口为所述第一开口(46)，所述外平衡孔(25)的开口为所述第二开口(27)。
  2. 根据权利要求1所述的电磁阀，其特征在于，所述活塞部件还包括第一密封垫(31)，所述第一密封垫(31)设置在所述外活塞(20)和所述内活塞结构之间，所述第一密封垫(31)的朝向所述出口(12)的端面为环形密封面，所述外活塞(20)的端部与所述环形密封面的外周缘限位配合，所述内活塞结构的端部与所述环形密封面的内周缘限位配合。
  3. 根据权利要求2所述的电磁阀，其特征在于，所述内活塞结构包括内活塞(40)和设置在所述内活塞(40)的端部的垫片(32)，所述内活塞(40)与所述外活塞(20)限位配合，所述第一密封垫(31)设置在所述外活塞(20)和所述内活塞(40)之间，所述垫片(32)与所述环形密封面的内周缘限位配合。
  4. 根据权利要求3所述的电磁阀，其特征在于，
    所述外活塞(20)包括外筒体(21)和设置在所述外筒体(21)的靠近所述出口(12)的一端的第一限位环(22)，所述外筒体(21)的外壁与所述容纳腔的内壁配合；
    所述内活塞(40)包括相互连接的第一内筒体(41)和第二内筒体(42)，所述第二内筒体(42)的外径小于所述第一内筒体(41)的外径，所述第一内筒体(41)与所述外筒体(21)限位配合，所述垫片(32)设置在所述第二内筒体(42)上；
    所述第一密封垫(31)位于所述外筒体(21)、所述第一内筒体(41)和所述第二内筒体(42)围绕形成的区域内，所述第一限位环(22)与所述环形密封面的外周缘限位配合，所述第一内筒体(41)的端面与所述第一密封垫(31)的背离所述出口(12)的 一侧抵接。
  5. 根据权利要求3所述的电磁阀，其特征在于，所述外活塞(20)的内壁具有第一限位台阶(23)，所述内活塞(40)的外壁上具有第二限位台阶(43)，所述第一限位台阶(23)与所述第二限位台阶(43)配合。
  6. 根据权利要求3所述的电磁阀，其特征在于，
    所述外活塞(20)包括外筒体(21)和设置在所述外筒体(21)的远离所述出口(12)的一端的第二限位环(24)，所述第二限位环(24)与所述内活塞(40)铆接。
  7. 根据权利要求3所述的电磁阀，其特征在于，所述内活塞结构还包括：
    第二密封垫(33)，所述第二密封垫(33)设置在所述内活塞(40)的远离所述出口(12)的一端，所述第二密封垫(33)具有导阀口(34)，所述导阀口(34)与所述内活塞(40)的通孔连通，所述内活塞(40)的通孔与所述出口(12)连通。
  8. 根据权利要求2所述的电磁阀，其特征在于，所述外活塞(20)具有环绕所述外活塞(20)的外壁设置的第二环形槽(26)，所述活塞部件还包括：
    弹性环(35)，设置在所述第二环形槽(26)内，所述弹性环(35)的侧壁上具有缺口，所述弹性环(35)的径向截面为矩形；
    密封环(36)，设置在所述第二环形槽(26)内，所述密封环(36)的内壁与所述弹性环(35)的外壁抵接，所述密封环(36)的外壁与所述容纳腔的内壁抵接。
  9. 根据权利要求1所述的电磁阀，其特征在于，所述电磁阀还包括：
    辅助阀(60)，可移动地设置在所述平衡通道内，所述辅助阀(60)与所述平衡通道的内壁之间具有预设间隙(61)，所述辅助阀(60)具有封堵所述第一开口(46)的第一状态以及避让所述第一开口(46)的第二状态。
  10. 根据权利要求9所述的电磁阀，其特征在于，所述辅助阀(60)包括：
    第一阀针(62)，可移动地设置在所述平衡通道内，所述第一阀针(62)与所述平衡通道的内壁之间具有所述预设间隙(61)，所述第一阀针(62)用于封堵所述第一开口(46)；
    弹性件(63)，设置在所述平衡通道内，所述弹性件(63)与所述第一阀针(62)配合，以沿所述第一阀针(62)背离所述第一开口(46)的方向对所述第一阀针(62)施加作用力。
  11. 根据权利要求10所述的电磁阀，其特征在于，所述内平衡孔(44)内具有间隔设置的第一止挡面和第二止挡面，所述第一阀针(62)的外壁上具有第三止挡面，所述弹性件(63)的一端与所述第一止挡面抵接，所述弹性件(63)的另一端与所述第三止挡面抵接，所述第二止挡面用于对所述第一阀针(62)的远离所述第一开口(46)的一端限位。
  12. 根据权利要求10所述的电磁阀，其特征在于，所述活塞部件包括主体结构和可拆卸地设置在所述主体结构上的挡块(37)，所述内平衡孔(44)的一部分位于所述主体结构上，所述内平衡孔(44)的另一部分位于所述挡块(37)上，所述第一开口(46)位于所述挡块(37)上；在所述第一阀针(62)的径向上，所述挡块(37)的尺寸大于所述第一阀针(62)的尺寸。
PCT/CN2020/138419 2020-01-03 2020-12-22 电磁阀 WO2021136022A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5769123A (en) * 1997-02-26 1998-06-23 Hunt Valve Company Inc. Cylinder actuated descale valve
WO2001023754A1 (de) * 1999-09-30 2001-04-05 Robert Bosch Gmbh Ventil zum steuern von flüssigkeiten
CN102278504A (zh) * 2011-06-27 2011-12-14 上海阀门厂有限公司 一种大气排放阀
CN110017400A (zh) * 2018-01-10 2019-07-16 盾安汽车热管理科技有限公司 一种降低开阀噪音的电磁阀
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