CN113187901A - Gas metering valve and valve plate structure thereof - Google Patents

Gas metering valve and valve plate structure thereof Download PDF

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Publication number
CN113187901A
CN113187901A CN202110461927.5A CN202110461927A CN113187901A CN 113187901 A CN113187901 A CN 113187901A CN 202110461927 A CN202110461927 A CN 202110461927A CN 113187901 A CN113187901 A CN 113187901A
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CN
China
Prior art keywords
valve plate
upper valve
metering
sealing
valve
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Pending
Application number
CN202110461927.5A
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Chinese (zh)
Inventor
滕煜
杨仕安
李涛
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Guangxi wobin Electronic Technology Co.,Ltd.
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Guangxi Kadiya Technology Co ltd
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Application filed by Guangxi Kadiya Technology Co ltd filed Critical Guangxi Kadiya Technology Co ltd
Publication of CN113187901A publication Critical patent/CN113187901A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • F02M21/0239—Pressure or flow regulators therefor
    • 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
    • F16K1/46—Attachment of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measuring Volume Flow (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention discloses a gas metering valve and a valve plate structure thereof, wherein the valve plate structure comprises an upper valve plate with a vent hole and a lower valve plate with a metering hole, and the upper valve plate and the lower valve plate are formed in a flow passage of a valve body and used for controlling the on-off of the flow passage; the upper valve plate is arranged as an independent moving body to be a sheet structure and has a magnetized function, and the upper valve plate and the lower valve plate are quickly separated to realize the smoothness of a flow channel based on the magnetic action provided by the driving part; the mechanical supporting force provided by the driving part pushes the upper valve plate to return quickly to be attached to the lower valve plate, and the closing of the flow channel is completed. The valve plate structure is applied to the gas metering valve, and is beneficial to improving the stability and reliability of the metering valve and improving the accurate metering of gas.

Description

Gas metering valve and valve plate structure thereof
Technical Field
The invention relates to the technical field of metering valves, in particular to a gas metering valve and a valve plate structure thereof.
Background
The gas metering valve is different from the liquid metering valve, liquid flowing through the liquid metering valve has self-lubricating property on a valve plug and a valve seat, friction, sealing property and the like generated by movement of the valve plug can be overcome through self-lubricating and viscosity characteristics of the liquid, and therefore the gas metering valve and the liquid metering valve have great structural design difference and are not universal. Although the prior gas metering valve has the following defects that the sealing performance is improved by arranging the rubber plane on the contact surface of the valve plug and the valve seat or the strict roughness control is carried out on the lower surface of the valve plug and the upper surface of the valve seat, the prior gas metering valve has the following defects: 1. the moving parts comprise a valve plug, an armature, a moving valve core and the like, the contact area between the moving parts and the inner flow channel is long, the problems of resistance, response time, abrasion and the like of the moving parts are increased, and accurate metering and stability are influenced; 2. the sealing structure between the valve plug and the valve seat is frequently impacted and extruded, is easy to deform and loses the sealing effect; 3. the batch production metering valve which can not meet the requirement of different devices for metering different flow sizes can not be produced.
Aiming at the defects of the existing gas metering valve, a gas metering valve which meets the market application requirements and is accurate, stable and reliable in metering needs to be designed urgently,
disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
Still another object of the present invention is to provide a valve plate structure, in which an upper valve plate of the valve plate structure is configured as a plate structure and is formed in a valve body as an independent moving body, so as to reduce friction loss with a flow passage, reduce impact damage, improve stability and reliability of a metering valve, and improve a movement response time of the valve plate moving body, so that the upper valve plate and a lower valve plate can be quickly separated and returned, thereby improving accurate metering of the metering valve.
The invention provides a gas metering valve arranged by utilizing the valve plate structure, which utilizes the advantages of the valve plate structure to realize the improvement of the stability and the reliability of the gas metering valve and the accurate metering of gas.
To achieve these objects and other advantages in accordance with the present invention, there is provided a valve plate structure including an upper valve plate having a vent hole and a lower valve plate having a metering hole, the upper and lower valve plates being formed in a flow passage of a valve body to control opening and closing of the flow passage;
the upper valve plate is arranged as an independent moving body to be a sheet structure and has a magnetized function, and the upper valve plate and the lower valve plate are quickly separated to realize the smoothness of a flow channel based on the magnetic action provided by the driving part; the mechanical supporting force provided by the driving part pushes the upper valve plate to return quickly to be attached to the lower valve plate, and the closing of the flow channel is completed.
Preferably, the upper valve plate has a magnetized function and is designed such that: part or all of the upper valve plate is made of soft magnetic materials.
Preferably, the driving part providing the magnetic force is a first driving part, the driving part providing the mechanical supporting force is a second driving part, and the upper end of the axis of the upper valve plate is provided with a sinking groove for the second driving part to collide against.
Preferably, the lower end face of the upper valve plate is provided with a sealing sheet which is used for abutting against a sealing platform on the upper end face of the lower valve plate to form a sealing surface so as to seal the metering hole; and the upper end surface of the lower valve plate is provided with a limiting block, the height of the limiting block is slightly lower than that of the sealing platform, and the limiting block is used for abutting against a non-sealing plate area on the lower end surface of the upper valve plate.
Preferably, the limiting block is a circular ring-shaped bulge and is arranged on an outer ring coaxial with the sealing table.
Preferably, the edge of the upper valve plate is rounded or chamfered.
The invention also provides a gas metering valve which adopts the valve plate structure as a valve component, and further comprises a first driving part for providing an upward moving magnetic force action for the upper valve plate, a second driving part for providing a return action for the upper valve plate and a shell.
Preferably, still include the flux sleeve, it is located inside the casing, the flux sleeve is cavity structure, and the upper end of flux sleeve is sealed as an organic whole or through the dismantled and assembled seal of flux cover, and first drive component, second drive component and valve block structure set up in the flux sleeve cavity, are provided with spacing portion in the flux sleeve lower extreme cavity, spacing portion with form the removal space of upper valve piece between the lower valve piece of valve block structure, upper valve piece under the effort of first drive component and second drive component, upper valve piece can reciprocate between spacing portion and lower valve piece in order to control the switching to the metering hole of lower valve piece.
Preferably, a lift adjusting ring is further arranged in the cavity at the lower end of the magnetic conductive sleeve and located between the limiting portion and the upper valve plate, and the sum of the fluxes of all the metering holes is larger than the flux of the maximum stroke gap of the upper valve plate, so that the lift adjusting ring is used for adjusting the maximum lift of the upper valve plate and protecting the upper valve plate and the limiting portion.
Preferably, the cavity at the lower end of the magnetic conduction sleeve further comprises a magnetic isolation ring, and the upper valve plate is sleeved in the magnetic isolation ring in a vertically sliding manner.
The invention at least comprises the following beneficial effects:
according to the invention, the upper valve plate of the valve plate structure is arranged into a sheet structure and is formed in the valve body as an independent moving body, so that the friction loss in a flow channel is reduced, the impact damage is reduced, the stability and the reliability of the metering valve are improved, the motion response time of the valve plate moving body is prolonged, the upper valve plate and the lower valve plate can be quickly separated and reset, and the accurate metering of the metering valve is improved. The device is particularly used for a natural gas engine system, realizes accurate measurement of gas injection quantity, ensures that the engine works in the optimal air-fuel ratio state, and meets the requirements of energy conservation and emission reduction.
And secondly, the upper end of the axis of the upper valve plate is provided with a sinking groove, so that the support force of the second driving part on the upper valve plate is prevented from deviating.
And thirdly, the edge of the upper valve plate is arc-shaped or chamfered, so that the upper valve plate can rise and fall more smoothly, the upper valve plate and the lower valve plate can be separated and reset quickly, the impact with the inner flow passage or the magnetism isolating ring is reduced, and the contact area with the inner flow passage or the magnetism isolating ring is further reduced.
The limiting block can avoid excessive impact and extrusion between the sealing sheet of the upper valve sheet and the sealing table of the lower valve sheet, prolong the service life of the sealing sheet and improve the stability and reliability of the formed gas metering valve. For example: the limiting block is a circular ring-shaped bulge and is arranged on an outer ring coaxial with the sealing platform.
And fifthly, a lift adjusting ring for changing the maximum stroke of the upper valve plate is arranged in the cavity at the lower end of the magnetic sleeve, so that the flow range of batch products can be changed. Meanwhile, the upper valve plate of the independent moving body and the limiting part of the magnetic conduction sleeve are protected, and the problems that the upper valve plate and the limiting part are damaged by movement impact, metering is not accurate and the like are avoided. The clamping connection is convenient for replacing and changing the flow range of the product.
The metering accuracy and the stability and the reliability of the metering valve are improved through the improvement on the aspects of sealing performance, response speed, friction loss and the like, and the rotating speed requirement of a high-frequency engine is more favorably met.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of one implementation of a gas metering valve of the present invention;
FIG. 2 is an enlarged schematic view of the upper and lower plates of the gas metering valve of the present invention disposed in the flow passage;
FIG. 3 is an enlarged schematic view of the upper valve plate of the present invention;
FIG. 4 is a schematic top view of the structure of FIG. 3;
FIG. 5 is an enlarged view of the lower valve plate according to the present invention;
fig. 6 is a schematic top view of the structure of fig. 5.
In the figure: a magnetic core 1; a magnetic conduction cover 2; a spring pin 3; a magnetic conductive sleeve 4; a coil block 5; a lift adjusting ring 6; a magnetism isolating ring 7; an upper valve plate 8; a lower valve plate 9; an air duct 10; a sealing sheet 11; a stopper portion 12; a filter screen 13; a second O-ring 14; a return spring 15; a first O-ring 16; a housing 17; a stopper 71; a metering orifice 72; a sealing table 73; a vent hole 81; sink tank 82.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It should be noted that in the description of the present invention, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 3-6, an implementation form of the valve plate structure is shown, and the valve plate structure is described in conjunction with the gas metering valve shown in fig. 1-2, the valve plate structure includes an upper valve plate 8 having a vent hole 81 and a lower valve plate 9 having a metering hole 72, and the upper valve plate 8 and the lower valve plate 9 are formed in a flow passage of a valve body for controlling the on-off of the flow passage;
the upper valve plate 8 is arranged as an independent moving body to be a sheet structure and has a magnetized function, and the upper valve plate 8 and the lower valve plate 9 are quickly separated to realize the smoothness of a flow channel based on the magnetic action provided by the driving part; the upper valve plate 8 is pushed to return fast to be attached to the lower valve plate 9 based on the mechanical supporting force provided by the driving part, and the closing of the flow channel is completed.
When the valve plate structure is arranged in a flow passage of a gas metering valve body and used for controlling the on-off of the flow passage, for example, a driving part providing a magnetic force action, such as an electromagnetic circuit assembly, is arranged in the valve body shown in fig. 1-2, a driving part providing a mechanical supporting force to push an upper valve plate 8 to return quickly, such as a return spring 15, is arranged in the center of the electromagnetic circuit assembly in a penetrating manner, the electromagnetic circuit assembly and the return spring 15 are both arranged above the upper valve plate 8, and the lower end of the return spring 15 is pressed against the upper end face of the upper valve plate 8. When a magnetic loop is electrified, the upper valve plate 8 is magnetized to move upwards, the upper valve plate 8 is separated from the lower valve plate 9, the vent hole 81 of the upper valve plate 8 is communicated with the metering hole 72 of the lower valve plate 9, and the flow channel of the valve body is opened; when the magnetic circuit is powered off, the upper valve plate 8 demagnetizes and moves back downwards under the action of the return spring 15, the upper valve plate 8 is pressed against the lower valve plate 9, the lower end face of the upper valve plate 8 and the upper end face of the lower valve plate 9 form a sealing surface, and a flow passage of the valve body is closed.
The valve plate structure of the invention is known by analyzing the working principle in the valve body, the upper valve plate 8 is designed into a sheet structure with a magnetized function, and the sheet structure as an independent moving body can be very thin, such as 10-50um, even thinner, so that when the upper valve plate 8 of the invention is used as the independent moving body to move up and down, the contact area with an inner flow passage is very small, the friction loss is reduced, and the stability and the reliability of the metering valve are improved, and the independent moving body of the upper valve plate 8 is set into the sheet structure to reduce the mass, so that on one hand, the impact damage can be reduced, the stability and the reliability of the metering valve are improved, on the other hand, the motion acceleration is improved, the response speed is improved, and the accurate metering of the metering valve is improved.
Therefore, the concept that the moving valve sheet is arranged into a sheet structure or is thinned and is formed in the valve body as an independent moving body to improve the stable reliability and accurate metering of the metering valve is within the protection scope of the invention.
Further, the upper valve plate 8 has a magnetized function designed to: part or all of the upper valve plate 8 is made of soft magnetic material. For example: the upper end face of the upper valve plate 8 is made of soft magnetic materials uniformly, the middle of the upper valve plate 8 is made of soft magnetic materials uniformly, or the upper valve plate 8 is made of soft magnetic materials uniformly, so that the upper valve plate 8 is magnetized and then receives magnetic attraction force uniformly distributed, and the upper valve plate 8 is prevented from moving obliquely.
Further, the driving part providing the magnetic force is set as a first driving part, the driving part providing the mechanical supporting force is set as a second driving part, and the upper end of the axis of the upper valve plate 8 is provided with a sinking groove 82 for the second driving part to collide against. The second driving part pushes and supports the upper valve plate 8 to be pressed against the lower valve plate 9 so as to close the flow channel. For example, the lower end of the return spring 15 is placed in the sinking groove 82, so that the support force of the return spring 15 on the upper valve plate 8 is prevented from being deflected.
On the basis of the above implementation form, the sealing sheet 11 is arranged on the lower end surface of the upper valve sheet 8, and is used for abutting against the sealing table 73 on the upper end surface of the lower valve sheet 9 to form a sealing surface so as to seal the metering hole 72. For example: the lower end of the axis of the upper valve plate 8 is provided with an installation groove, and the sealing sheet 11 is arranged in the installation groove to form a whole. In order to improve the sealing performance of the sealing surface formed by the lower end surface of the upper valve plate 8 and the sealing platform 73 on the upper end surface of the lower valve plate 9, a first sealing ring and a second sealing ring which are coaxial are sequentially arranged on the sealing platform 73 from outside to inside, the first sealing ring and the second sealing ring are both circular bulges, and the plurality of metering holes 72 are all arranged between the first sealing ring and the second sealing ring.
On the basis of the implementation form, the edge of the upper valve plate 8 is made into a circular arc or a chamfer. The edge of the upper valve plate 8 is arc-shaped or chamfered, so that the upper valve plate 8 can rise and fall more smoothly, the impact with the inner runner or the magnetism isolating ring 7 is reduced, and the contact area with the inner runner or the magnetism isolating ring 7 is further reduced.
On the basis of the implementation form, the upper end surface of the lower valve plate 9 is provided with a limit block 71, and the height of the limit block 71 is slightly lower than that of the sealing platform 73 and is used for abutting against the non-sealing plate 11 area of the lower end surface of the upper valve plate 8. The limiting block 71 can prevent the sealing sheet 11 of the upper valve sheet 8 and the sealing table 73 of the lower valve sheet 9 from being excessively impacted and extruded, the service life of the sealing sheet 11 is prolonged, and the stability and reliability of the formed gas metering valve are improved. For example: the stopper 71 is a circular ring-shaped protrusion and is disposed on an outer ring coaxial with the seal land 73.
As shown in fig. 1-2, an implementation of the gas metering valve is described in conjunction with the valve plate structure shown in fig. 3-6, and the gas metering valve includes a first driving part for providing an upward moving magnetic force to the upper valve plate 8, a second driving part for providing a return force to the upper valve plate 8, and a housing 17, using the valve plate structure as a valve assembly.
On the basis of the above implementation form, the valve plate device further comprises a magnetic conductive sleeve 4 which is positioned inside the shell 17, wherein the magnetic conductive sleeve 4 is of a cavity structure, the upper end of the magnetic conductive sleeve 4 is integrally sealed or detachably sealed through a magnetic conductive cover 2, the first driving part, the second driving part and the valve plate structure are arranged in the cavity of the magnetic conductive sleeve 4, a limiting part 12 is arranged in the cavity at the lower end of the magnetic conductive sleeve 4, the utility model discloses a structure of valve block structure, including limiting part 12, upper valve plate 8, lower valve plate 9, upper valve plate 8 and lower valve plate 12, limiting part 12 and lower valve plate 9 of valve block structure form the removal space of upper valve plate 8 between, and upper valve plate 8 sets up in the space that limiting part 12 and lower valve plate 9 formed, and upper valve plate 8 is under the effort of first drive division and second drive part, and the structure in figure 1 is exactly that upper valve plate 8 is under the elastic force of magnetic force and reset spring 15, and upper valve plate 8 can reciprocate between limiting part 12 and lower valve plate 9 in order to control the switching to lower valve plate 9's metering hole 72. Therefore, the on-off of a flow channel of the gas metering valve is controlled, under the condition that the process sets the flux of the maximum stroke gap between the upper valve plate 8 and the lower valve plate 9, the upper valve plate 8 is of a sheet structure and serves as an independent dynamic body, the mass and the friction loss of the dynamic body are reduced, the response speed is improved, and the gas flow of the opening time period of the upper valve plate 8 and the lower valve plate 9 is accurately metered.
Fig. 1 shows that the first drive component comprises a magnetic core 1 and a coil assembly 5; the second driving part comprises a spring pin 3 and a return spring 15; the magnetic conduction cover 2 is assembled at the upper end of the cavity of the magnetic conduction sleeve 4, the magnetic conduction cover 2 and the magnetic conduction sleeve 4 are arranged in the shell 17, the magnet core 1 is arranged in a middle channel of the magnetic conduction cover 2 and the magnetic conduction sleeve 4, the spring pin 3 is pressed in an inner axis channel of the magnet core 1, the reset spring 15 is arranged between the spring pin 3 and the upper valve plate 8, the sinking groove 82 of the reset spring 15 is used for placing the lower end of the reset spring 15, the coil assembly 5 is arranged on the outer circumferential surface of the magnet core 1, the upper end of the coil assembly 5, the magnetic conduction cover 2 and the magnet core 1 form sealing through the first O-shaped ring 16, the lower end of the coil assembly 5 and the magnetic conduction sleeve 4 form sealing through the second O-shaped ring 14, and the valve plate structure is limited in the cavity at the lower end of the magnetic conduction sleeve 4. The cavity structure of the flux sleeve 4 shown in fig. 1 is a cylindrical cavity at the upper end of the flux sleeve 4, and the space for arranging the valve plate structure is a cylindrical cavity. The middle lower end of the magnetic sleeve 4 and the lower end of the magnetic core 1 are provided with communicated air holes, the air holes at the middle lower end of the magnetic sleeve 4 are used as the air inlet of a flow channel of the gas metering valve and reach the moving space of the upper valve plate 8 through the air holes at the lower end of the magnetic core 1, or the air holes at the middle lower end of the magnetic sleeve 4 directly reach the moving space of the upper valve plate 8, so that the air inlet of the flow channel is communicated with the air holes 81 of the upper valve plate 8. The vent holes 81 of the upper valve plate 8 can be multiple and are arranged on the sheet body and the axle center of the upper valve plate 8 and used for being communicated with the flow channel.
On the basis of the above implementation form, a lift adjusting ring 6 is further arranged in the cavity at the lower end of the magnetic conductive sleeve 4, and is located between the limiting portion 12 and the upper valve plate 8, and the sum of the fluxes of all the metering holes 72 is greater than the flux of the maximum stroke gap of the upper valve plate 8, so that the lift adjusting ring is used for adjusting the maximum lift of the upper valve plate 8 and protecting the upper valve plate 8 and the limiting portion 12. The lift adjusting ring 6 can be fixed or clamped on the limiting part 12. The upper valve plate 8 and the lower valve plate 9 shown in fig. 1 and 2 are attached to each other, and are in a state of closing a valve body flow passage, a gap through which the upper valve plate 8 can move upwards is formed between the upper valve plate 8 and the lift adjusting ring 6, and the gap is small, so that the gap is not shown in fig. 1 and 2, and does not exist. According to the invention, the lift adjusting ring 6 for changing the maximum stroke of the upper valve plate 8 is arranged in the cavity at the lower end of the magnetic conductive sleeve 4, so that the function of changing the flow range of batch products is facilitated.
For example: under the condition that other components do not need to be changed, the gas metering valve only needs to replace the lift adjusting ring 6 with different thicknesses, and the lower valve plate 9 is pressed against the maximum stroke change of the lift adjusting ring 6, so that the lift of the upper valve plate 8 can be changed, the flux of the maximum stroke gap of the upper valve plate 8 is changed, different output flow sizes are metered within the same metering time, and the requirements of different products are met. The realization principle is as follows: when the gas flows for the same time, the maximum stroke of the upper valve plate 8 determines the flow, and the upper valve plate 8 and the lower valve plate 9 are opened for a specified time period under the condition that the sum of the maximum fluxes of all the metering holes 72 is larger than the flux of the maximum stroke gap of the upper valve plate 8, and the larger the gap of the maximum stroke of the upper valve plate 8 is, the larger the flow is at the same pressure and temperature.
Meanwhile, the upper valve plate 8 of the independent moving body and the limiting part 12 of the magnetic conduction sleeve 4 are protected, and the problems that the upper valve plate 8 and the limiting part 12 are damaged by movement impact, so that metering is not accurate and the like are avoided. The clamping connection is convenient for replacing and changing the flow range of the product.
On the basis of the above implementation form, the cavity at the lower end of the magnetic conductive sleeve 4 further comprises a magnetism isolating ring 7, and the upper valve plate 8 is sleeved in the magnetism isolating ring 7 in a vertically sliding manner. The lower end of the cavity of the magnetic conduction sleeve 4 is also communicated with an air duct 10 which is used for guiding out the air in the metering hole 72 of the lower valve plate 9. And a filter screen 13 is arranged at the air inlet of the flow passage of the gas metering valve.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (10)

1. The valve plate structure is characterized by comprising an upper valve plate with a vent hole and a lower valve plate with a metering hole, wherein the upper valve plate and the lower valve plate are formed in a flow passage of the valve body and used for controlling the on-off of the flow passage;
the upper valve plate is arranged as an independent moving body to be a sheet structure and has a magnetized function, and the upper valve plate and the lower valve plate are quickly separated to realize the smoothness of a flow channel based on the magnetic action provided by the driving part; the mechanical supporting force provided by the driving part pushes the upper valve plate to return quickly to be attached to the lower valve plate, and the closing of the flow channel is completed.
2. The valve plate structure of claim 1, wherein the upper valve plate has a magnetized function designed to: part or all of the upper valve plate is made of soft magnetic materials.
3. The valve plate structure of claim 1, wherein the driving member providing a magnetic force is a first driving member, the driving member providing a mechanical supporting force is a second driving member, and the upper end of the axial center of the upper valve plate is provided with a sink for interference of the second driving member.
4. The valve sheet structure according to claim 1, wherein a sealing sheet is provided on the lower end surface of the upper valve sheet for pressing against a sealing land on the upper end surface of the lower valve sheet to form a sealing surface for sealing the metering hole; and the upper end surface of the lower valve plate is provided with a limiting block, the height of the limiting block is slightly lower than that of the sealing platform, and the limiting block is used for abutting against a non-sealing plate area on the lower end surface of the upper valve plate.
5. The valve sheet structure of claim 4, wherein the stopper is a circular protrusion disposed on an outer ring coaxial with the seal land.
6. The valve sheet structure according to any one of claims 1 to 5, wherein the edge of the upper valve sheet is rounded or chamfered.
7. Gas metering valve, comprising a valve assembly using a valve plate structure according to any of claims 1 to 6, a first actuating member for providing an upward magnetic force to the upper valve plate, a second actuating member for providing a return force to the upper valve plate, and a housing.
8. The gas metering valve of claim 7, further comprising a flux sleeve located inside the housing, wherein the flux sleeve is of a cavity structure, an upper end of the flux sleeve is integrally sealed or detachably sealed through a flux cover, the first driving part, the second driving part and the valve plate structure are arranged in the flux sleeve cavity, a limiting part is arranged in a lower end cavity of the flux sleeve, a moving space of the upper valve plate is formed between the limiting part and a lower valve plate of the valve plate structure, and the upper valve plate can move up and down between the limiting part and the lower valve plate under the action force of the first driving part and the second driving part to control opening and closing of the metering hole of the lower valve plate.
9. The gas metering valve of claim 8, wherein a lift adjusting ring is further arranged in the lower end cavity of the magnetic conductive sleeve and located between the limiting portion and the upper valve plate, and the sum of fluxes of all the metering holes is larger than a flux of a maximum stroke gap of the upper valve plate, so that the lift adjusting ring is used for adjusting the maximum lift of the upper valve plate and protecting the upper valve plate and the limiting portion.
10. A gas metering valve as claimed in claim 8 or claim 9 wherein the chamber at the lower end of the flux sleeve further comprises a flux-trap ring, the upper valve plate being slidably mounted within the flux-trap ring.
CN202110461927.5A 2021-04-08 2021-04-27 Gas metering valve and valve plate structure thereof Pending CN113187901A (en)

Applications Claiming Priority (2)

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CN202110376692 2021-04-08
CN202110376692X 2021-04-08

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CN113187901A true CN113187901A (en) 2021-07-30

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CN202120884698.3U Active CN214888879U (en) 2021-04-08 2021-04-27 Gas metering valve and valve plate structure thereof

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