CN118328173A - Flow control device applied to oxygen system - Google Patents

Flow control device applied to oxygen system Download PDF

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Publication number
CN118328173A
CN118328173A CN202410567993.4A CN202410567993A CN118328173A CN 118328173 A CN118328173 A CN 118328173A CN 202410567993 A CN202410567993 A CN 202410567993A CN 118328173 A CN118328173 A CN 118328173A
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CN
China
Prior art keywords
oxygen
flow control
control device
flow
valve
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
CN202410567993.4A
Other languages
Chinese (zh)
Inventor
张宝剑
庄凤婷
沈兰
石志高
李想
王子宁
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.)
Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Original Assignee
Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
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 Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC filed Critical Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Priority to CN202410567993.4A priority Critical patent/CN118328173A/en
Publication of CN118328173A publication Critical patent/CN118328173A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/14—Respiratory apparatus for high-altitude aircraft
    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
    • 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
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/365—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a diaphragm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space
    • B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space the air being conditioned
    • B64D2013/0603—Environmental Control Systems
    • B64D2013/0655—Environmental Control Systems with zone or personal climate controls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space
    • B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space the air being conditioned
    • B64D2013/0603—Environmental Control Systems
    • B64D2013/0677—Environmental Control Systems comprising on board oxygen generator systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space
    • B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space the air being conditioned
    • B64D2013/0603—Environmental Control Systems
    • B64D2013/0681—Environmental Control Systems with oxygen control

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Lift Valve (AREA)

Abstract

The application belongs to the technical field of airborne oxygen systems, and particularly relates to a flow control device applied to an oxygen system. The flow control device comprises an inlet connector, a lower cavity shell, a valve seat, a spring, a valve rod, a hard core, a fixed ring, a diaphragm, an upper cavity shell, a first outlet connector, a second outlet connector and the like. Compared with the traditional metering hole flow control mode, the application reduces the consumption of the total oxygen amount when the inlet pressure is too high under the condition of ensuring that the total output flow meets the rear end requirement. The outlet end of the application outputs the gas flow with continuously reduced flow along with the increase of the inlet pressure, and the outlet end of the application outputs the increased gas flow to the rear end along with the increase of the inlet pressure. Therefore, the two output ends of the application can be flexibly applied to different scenes, and can selectively output flow according to the requirements of the rear end. The present application is equally applicable to flow control of gases other than oxygen.

Description

Flow control device applied to oxygen system
Technical Field
The application belongs to the technical field of airborne oxygen systems, and particularly relates to a flow control device applied to an oxygen system.
Background
Hypoxia encountered in high altitude flight is caused by the fact that the partial pressure of oxygen in the inhaled air is correspondingly reduced due to the reduction of the atmospheric pressure in the high altitude, and the organism tissues cannot obtain normal oxygen supply.
The oxygen system is an important component in the aircraft, and has the function of high-altitude personal oxygen supply equipment designed for preventing the harm of high-altitude hypoxia, low-pressure effect and vertical forward overload to the pilot and guaranteeing the life safety of the pilot. There are two sources of oxygen in oxygen systems: one is that the main oxygen source is provided by on-board oxygen production equipment, and is a renewable oxygen source that is at a relatively low pressure. The other is a standby oxygen source, which is a set of air oxygen source for standby of the onboard oxygen generating source and is used when the onboard oxygen generating source fails or supplies oxygen in emergency. The backup oxygen source is a limited non-renewable oxygen source that is at a relatively high pressure.
In order for the pilot to still have sufficient time to complete the flight mission in the event of a failure in on-board oxygen production, it is necessary to control the consumption of the backup oxygen source. The conventional way is to control the outlet flow by means of a sizing hole. However, the outlet flow rate of the fixed-bore sizing hole is continuously increased along with the continuous increase of the inlet pressure, and when the inlet pressure is higher than a certain value, the output flow rate is always higher than the required flow rate, so that the waste of oxygen is caused.
It is therefore desirable to have a solution that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
It is an object of the present application to provide a flow control device for an oxygen system that solves at least one of the problems of the prior art.
The technical scheme of the application is as follows:
a first aspect of the present application provides a flow control device for an oxygen system, comprising:
The lower cavity shell is internally provided with a lower cavity, a flow channel A, a flow channel B and a flow channel C, wherein the flow channel A is communicated with the flow channel C;
The inlet connector is arranged at the lower end of the lower cavity shell, one end of the inlet connector is communicated with the lower cavity and the flow channel C, and the other end of the inlet connector is connected with an external air source;
The first outlet connector is arranged on the side wall of the lower cavity shell, one end of the first outlet connector is communicated with the flow passage B, and the other end of the first outlet connector is connected with using equipment;
The second outlet connector is arranged on the side wall of the lower cavity shell, one end of the second outlet connector is communicated with the flow channel C, and the other end of the second outlet connector is connected with using equipment;
The valve seat is arranged in the lower cavity, a valve cavity is arranged in the valve seat, an opening for communicating the valve cavity with the inlet connector is formed in the lower end of the valve seat, and an opening for communicating the valve cavity with the flow channel B is formed in the side wall of the valve seat;
the valve rod is arranged in the valve cavity and is provided with a limiting part;
The spring is sleeved on the valve rod, the upper end of the spring is abutted against the limiting part, and the lower end of the spring is abutted against the valve seat;
the hard core is arranged at the upper end of the valve rod;
the fixed ring is sleeved on the hard core and fixedly connected with the lower cavity shell;
The upper cavity shell is arranged at the upper end of the lower cavity shell, an upper cavity and a flow channel D are arranged in the upper cavity shell, the upper cavity is communicated with the flow channel D, and the flow channel D is communicated with the flow channel A;
and the lower end of the diaphragm is contacted with the hard core, and the upper end of the diaphragm is contacted with the upper cavity.
In at least one embodiment of the present application, a first gasket is disposed between the lower end of the shutter base and the lower chamber housing.
In at least one embodiment of the present application, the lower end of the shutter lever is provided with a second gasket.
In at least one embodiment of the present application, a third spacer is disposed between the spring and the stopper of the shutter lever.
In at least one embodiment of the application, a first sealing ring is arranged between the side wall of the valve seat and the valve rod.
In at least one embodiment of the application, a second sealing ring is arranged between the side wall of the valve seat and the lower cavity shell.
In at least one embodiment of the present application, a first sizing hole is provided at an end of the first outlet nozzle connected to the lower chamber housing, and a third sealing ring is provided at an end of the first sizing hole connected to the flow channel B.
In at least one embodiment of the present application, a second sizing hole is provided at an end of the second outlet nozzle connected to the lower cavity casing, and a fourth sealing ring is provided at an end of the second sizing hole connected to the flow channel C.
In at least one embodiment of the present application, steel balls for sealing the flow passage are disposed in the flow passage a, the flow passage C, and the flow passage D.
A second aspect of the present application provides an oxygen system comprising a flow control device as described above, further comprising: an oxygen generator, an oxygen storage device equipped with a pressure reducer, an oxygen source conversion device, a three-way valve and a using device, wherein,
The oxygen generating device and the oxygen storage device are respectively connected with the inlet connector of the flow control device through the oxygen source conversion device, and the first outlet connector and the second outlet connector of the flow control device are respectively connected with the using equipment through the three-way valve.
The invention has at least the following beneficial technical effects:
The flow control device applied to the oxygen system can reduce the waste of the standby oxygen and increase the service time of the standby oxygen.
Drawings
FIG. 1 is an angular cross-sectional view of a flow control device for use in an oxygen system according to one embodiment of the present application;
FIG. 2 is another angular cross-sectional view of a flow control device of one embodiment of the present application as applied to an oxygen system;
FIG. 3 is a schematic view of a flow control device for an oxygen system according to one embodiment of the present application;
FIG. 4 is a schematic diagram of an oxygen system according to one embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application become more apparent, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present application.
The application is described in further detail below with reference to fig. 1 to 4.
The first aspect of the present application provides a flow control device applied to an oxygen system, comprising an inlet tap 1, a lower chamber housing 2, a shutter seat 4, a spring 6, a shutter lever 7, a hard core 11, a fixing ring 12, a diaphragm 13, an upper chamber housing 14, a first outlet tap 16, a second outlet tap 18, etc.
Specifically, as shown in fig. 1-3, a lower cavity, a runner A, a runner B and a runner C are arranged in the lower cavity shell 2, and the runner A is communicated with the runner C; the inlet connector 1 is arranged at the lower end of the lower cavity shell 2, one end of the inlet connector 1 is communicated with the lower cavity and the flow channel C, and the other end of the inlet connector 1 is connected with an external air source; the first outlet connector 16 is arranged on the side wall of the lower cavity shell 2, one end of the first outlet connector 16 is communicated with the flow channel B, and the other end of the first outlet connector 16 is connected with using equipment; the second outlet connector 18 is arranged on the side wall of the lower cavity shell 2, one end of the second outlet connector 18 is communicated with the flow channel C, and the other end of the second outlet connector 18 is connected with the using equipment; the valve seat 4 is arranged in the lower cavity, a valve cavity is arranged in the valve seat 4, an opening for communicating the valve cavity with the inlet nozzle 1 is formed in the lower end of the valve seat 4, and an opening for communicating the valve cavity with the flow passage B is formed in the side wall of the valve seat 4; the valve rod 7 is arranged in the valve cavity, and a limiting part is arranged on the valve rod 7; the spring 6 is sleeved on the valve rod 7, the upper end of the spring 6 is abutted against the limiting part, and the lower end of the spring is abutted against the valve seat 4; the hard core 11 is arranged at the upper end of the valve rod 7; the fixed ring 12 is sleeved on the hard core 11 and is fixedly connected with the lower cavity shell 2; the upper cavity shell 14 is arranged at the upper end of the lower cavity shell 2, an upper cavity and a flow channel D are arranged in the upper cavity shell 14, the upper cavity is communicated with the flow channel D, and the flow channel D is communicated with the flow channel A; the lower end of the diaphragm 13 is in contact with the hard core 11 and the upper end is in contact with the upper cavity.
The application relates to a flow control device applied to an oxygen system, wherein an inlet connector 1 is an inlet for gas to enter a flow control device 26 and is used for connecting an external gas source. The lower chamber housing 2 is a main body structure for fixing and installing the rest parts in the flow control device 26, and an air passage (a lower cavity, a flow passage A, a flow passage B and a flow passage C) for air circulation is designed in the lower chamber housing 2.
In a preferred embodiment of the present application, a first gasket 3 is provided between the lower end of the shutter seat 4 and the lower chamber housing 2. The first gasket 3 is made of rubber material and is used for sealing between the contact surface of the valve seat 4 and the lower cavity shell 2.
In a preferred embodiment of the present application, the lower end face of the shutter lever 7 is provided with a circular groove for fixing the second spacer 5, and the second spacer 5 is fixed to the lower end face of the shutter lever 7. The valve seat 4 is internally provided with a gas flow channel, and the opening at the lower end of the valve seat 4 and the second gasket 5 of the local structure of the valve seat 4 are matched with each other to control the flow of gas paths flowing into the valve seat 4 and the opening and closing of the passages of the gas flowing into the valve seat 4. The reciprocating motion of the valve rod 7 under the drive of the comprehensive acting force drives the reciprocating motion of the second gasket 5, so that different gas flow areas between the valve seat 4 and the second gasket 5 are realized. Different distances between the lower end opening of the valve seat 4 and the second gasket 5 form different air passage flow areas, when the distances are similar, the air passage flow area flowing into the valve seat 4 is small, and under the condition of the same inlet pressure, the air flow flowing into the valve seat 4 is small. Conversely, if the distance between the lower end opening of the valve seat 4 and the second gasket 5 is large, the flow rate of the gas flowing into the valve seat 4 is large. The valve seat 4 also provides a fixed position and a supporting structure for part of the components.
In a preferred embodiment of the application, a third spacer 10 is provided between the spring 6 and the stop of the shutter lever 7. The spring 6 forms an elastic force between the shutter lever 7 and the shutter base 4 for realizing elastic reciprocation of the shutter lever 7, and the pre-pressure of the spring 6 is adjusted to control the inlet pressure when the air passage formed between the second gasket 5 and the shutter base 4 is closed. The thickness of the third gaskets 10 corresponds to different initial compression amounts of the springs 6, namely different initial elastic forces of the springs 6 can be adjusted, and the different initial elastic forces correspond to closing pressures of air paths between the valve seat 4 and the second gaskets 5.
In a preferred embodiment of the application, a first sealing ring 8 is arranged between the side wall of the shutter base 4 and the shutter lever 7. In this embodiment, the first seal ring 8 is assembled in the seal groove of the valve seat 4, and forms a radial seal between the valve seat 4 and the valve rod 7, so as to prevent the gas entering the valve seat 4 from leaking toward the upper chamber housing 14.
In a preferred embodiment of the application, a second sealing ring 9 is arranged between the side wall of the shutter seat 4 and the lower chamber housing 2. In this embodiment, the seal ring 9 is assembled in the seal groove of the lower chamber housing 2, and forms a radial seal between the lower chamber housing 2 and the shutter seat 4, and prevents the gas entering the inside of the shutter seat 4 from leaking toward the upper chamber housing 14 together with the first seal ring 8.
The flow control device for an oxygen system of the present application has a hard core 11 mounted on the upper end surface of the shutter lever 7 for transmitting the pressure of the diaphragm 13 to drive the shutter lever 7 to move in the axial direction. The fixed ring 12 is used in cooperation with the hard core 11, and the fixed ring 12 is fixed in position and is used for guiding the axial movement of the hard core 11. The diaphragm 13 is a pressure sensitive element for sensing the pressure difference between the inside of the upper chamber housing 14 and the hard core 11, and different deformation amounts are generated by different pressure differences between the upper surface and the lower surface of the diaphragm 13, and the larger the pressure difference is, the larger the deformation amount is. The upper chamber housing 14 has a gas flow passage and a cavity therein. When the upper chamber housing 14 is assembled to the lower chamber housing 2, the gas flow passage formed therebetween introduces inlet gas into the upper cavity of the upper chamber housing 14, whereby the generated gas pressure acts on the diaphragm 13.
In a preferred embodiment of the application, the end of the first outlet nipple 16 connected to the lower housing 2 is provided with a first sizing hole 15, and the end of the second outlet nipple 18 connected to the lower housing 2 is provided with a second sizing hole 17. The first and second sizing holes 15 and 17 are used for limiting the maximum output flow rate under different pressures, and the smaller the diameters of the first and second sizing holes 15 and 17, the smaller the output flow rate.
In this embodiment, a third sealing ring 21 is disposed at the end of the first sizing hole 15 connected to the flow channel B, for realizing end face sealing between the two; the end of the second sizing hole 17 connected with the runner C is provided with a fourth sealing ring 20 for realizing end face sealing between the second sizing hole and the runner C.
In the preferred embodiment of the application, steel balls 19 for sealing the flow channels are arranged in the flow channels A, C and D, and the tightness of the gas flow channel of the whole device is ensured by the steel balls 19 assembled in the flow channels of the process holes.
The application relates to a flow control device applied to an oxygen system, which specifically adopts the following working principle: after the gas enters from the inlet nozzle 1, the gas flow can be divided into three paths. The first path of gas passes through the flow channel C and then enters the second outlet nozzle 18 through the second sizing hole 17, and then is output to the rear end using equipment, and the flow rate of the gas output by the second outlet nozzle 18 is continuously increased along with the increase of the inlet pressure. The second gas enters the upper cavity of the upper cavity shell 14 through the flow channel C and the flow channel A and acts on the upper end face of the diaphragm 13. The third gas enters the valve cavity in the valve seat 4 through the lower end opening of the valve seat 4, flows into the first diameter-fixing hole 15 through the flow channel B, enters the first outlet connector 16 and is output to the rear end using equipment. Along with the continuous increase of the pressure in the inlet connector 1, the pressure in the upper cavity of the upper cavity shell 14 is gradually increased, the acting force of the upper end face of the diaphragm 13 is also increased, the deformation generated by the diaphragm 13 drives the hard core 11 to move, the hard core 11 transmits the driving force to the valve rod 7, the valve rod 7 is pushed to overcome the resultant force of the pressure of the elastic air-entraining body of the spring 6 on the second gasket 5 to drive the second gasket 5 to move towards the inlet connector 1, the flow area between the second gasket 5 and the valve seat 4 is gradually reduced, so that the gas flow entering the first constant diameter hole 15 is reduced, when the inlet pressure is increased to a certain value, the valve rod 7 drives the second gasket 5 to move to be in contact with the lower end opening of the valve seat 4, the passage of the gas entering the interior of the valve seat 4 is closed, and the output flow of the first outlet connector 16 is 0 at the moment, so that the consumption of excessive output flow under the high-pressure condition of the inlet pressure is reduced. When the pressure of the inlet tap 1 is reduced to a certain value, the air passage between the valve seat 4 and the second gasket 5 is re-opened, and the first outlet tap 16 outputs the flow again to the outside.
The flow control device applied to the oxygen system has the following beneficial effects:
(1) Compared with the traditional metering hole flow control mode, the method reduces the consumption of the total oxygen amount when the inlet pressure is too high under the condition that the total output flow meets the rear end requirement.
(2) The outlet end of the application outputs the gas flow with continuously reduced flow along with the increase of the inlet pressure, and the outlet end of the application outputs the increased gas flow to the rear end along with the increase of the inlet pressure. Therefore, the two output ends of the application can be flexibly applied to different scenes, and can selectively output flow according to the requirements of the rear end.
(3) The present application is equally applicable to flow control of gases other than oxygen.
A second aspect of the present application provides an oxygen system, as shown in fig. 4, comprising the flow control device 26 described above, further comprising: the oxygen generator 22, the oxygen storage device 23 provided with the pressure reducer 24, the oxygen source conversion device 25, the three-way valve 27 and the using equipment 28, wherein the oxygen generator 22 and the oxygen storage device 23 are respectively connected with the inlet tap 1 of the flow control device 26 through the oxygen source conversion device 25, and the first outlet tap 16 and the second outlet tap 18 of the flow control device 26 are respectively connected with the using equipment 28 through the three-way valve 27.
In the oxygen system of the present application, the two sources of gas are the oxygen generator 22 and the backup oxygen storage 23.
In the case where the oxygen generator 22 is operating normally, the oxygen source conversion device 25 turns on the oxygen generator 22 and turns off the output of the backup oxygen storage device 23. The oxygen generated by the bleed air entering the oxygen generator 22 passes through the oxygen source conversion device 25 and enters the flow control device 26. Because the oxygen pressure output by the oxygen generating device 22 is lower, the pressure of the oxygen reaching the upper cavity of the diaphragm 13 from the inlet connector 1 through the flow passage A is smaller, the smaller pressure can not drive the valve rod 7 to drive the second gasket 5 to close the gas inlet of the valve seat 4, but a certain flow area is maintained, so that the first outlet connector 16 and the second outlet connector 18 jointly output oxygen flow to the three-way valve 27. The three-way valve 27 combines two paths of oxygen into one path of oxygen for output to the using device 28.
When the oxygen generator 22 fails and cannot be used, the oxygen source conversion device 25 is connected to the standby oxygen storage device 23, and the high-pressure oxygen in the oxygen source conversion device 25 flows through the flow control device 26 after being depressurized to a certain pressure by the depressurizer 24. Since the pressure of the gas output by the standby oxygen storage device 23 is higher at the beginning, the pressure acting on the upper cavity of the diaphragm 13 is correspondingly higher, the diaphragm 13 deforms under the action of the up-down pressure difference, the deformation drives the hard core 11 to move towards the inlet connector 1, the movement of the hard core 11 pushes the valve rod 7 to drive the second gasket 5 to move along the direction of the inlet connector 1 and close the inlet channel of the valve seat 4, at the moment, the oxygen of the inlet connector 1 cannot enter the interior of the valve seat 4, the output flow of the first outlet connector 16 is 0, and the oxygen source consumption of the standby oxygen storage device 23 is reduced. As the oxygen is continuously output from the oxygen storage device 23, the pressure of the oxygen output therefrom will be reduced, and the flow rate output from the second outlet nozzle 18 will be reduced. When the pressure of the inlet nozzle 1 is reduced to a certain value, after the pressure of the upper cavity contacted by the upper end of the hard core 11 is reduced, the resultant force of the elastic force of the spring 6 and the air pressure acting on the second gasket 5 overcomes the air pressure of the upper cavity contacted by the upper end of the diaphragm 13, so that the air passage between the second gasket 5 and the valve seat 4 is opened again, and oxygen enters the valve seat 4 and then is output to the rear end using device 28 through the first outlet nozzle 16 via the flow passage B, and thus the first outlet nozzle 16 and the second outlet nozzle 18 output flow to the using device 28 simultaneously.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A flow control device for an oxygen system, comprising:
The device comprises a lower cavity shell (2), wherein a lower cavity, a runner A, a runner B and a runner C are arranged in the lower cavity shell (2), and the runner A is communicated with the runner C;
The inlet connector (1) is arranged at the lower end of the lower cavity shell (2), one end of the inlet connector (1) is communicated with the lower cavity and the flow channel C, and the other end of the inlet connector is connected with an external air source;
A first outlet connector (16), wherein the first outlet connector (16) is arranged on the side wall of the lower cavity shell (2), one end of the first outlet connector (16) is communicated with the flow channel B, and the other end of the first outlet connector is connected with using equipment;
a second outlet connector (18), wherein the second outlet connector (18) is arranged on the side wall of the lower cavity shell (2), one end of the second outlet connector (18) is communicated with the flow channel C, and the other end of the second outlet connector is connected with using equipment;
the valve seat (4) is arranged in the lower cavity, a valve cavity is arranged in the valve seat (4), an opening for communicating the valve cavity with the inlet connector (1) is formed in the lower end of the valve seat (4), and an opening for communicating the valve cavity with the flow passage B is formed in the side wall of the valve seat (4);
The valve rod (7) is arranged in the valve cavity, and a limiting part is arranged on the valve rod (7);
The spring (6) is sleeved on the valve rod (7), the upper end of the spring (6) is abutted against the limiting part, and the lower end of the spring is abutted against the valve seat (4);
A hard core (11), wherein the hard core (11) is arranged at the upper end of the valve rod (7);
The fixing ring (12) is sleeved on the hard core (11) and is fixedly connected with the lower cavity shell (2);
the upper cavity shell (14), the upper cavity shell (14) is arranged at the upper end of the lower cavity shell (2), an upper cavity and a flow channel D are arranged in the upper cavity shell (14), the upper cavity is communicated with the flow channel D, and the flow channel D is communicated with the flow channel A;
and the lower end of the diaphragm (13) is contacted with the hard core (11), and the upper end of the diaphragm (13) is contacted with the upper cavity.
2. Flow control device for oxygen systems according to claim 1, characterized in that a first gasket (3) is arranged between the lower end of the shutter seat (4) and the lower chamber housing (2).
3. Flow control device for oxygen systems according to claim 1, characterized in that the lower end of the shutter lever (7) is provided with a second gasket (5).
4. Flow control device for oxygen systems according to claim 1, characterized in that a third gasket (10) is arranged between the spring (6) and the limit of the shutter lever (7).
5. Flow control device for oxygen systems according to claim 1, characterized in that a first sealing ring (8) is arranged between the side wall of the shutter seat (4) and the shutter stem (7).
6. Flow control device for oxygen systems according to claim 1, characterized in that a second sealing ring (9) is arranged between the side wall of the shutter seat (4) and the lower chamber housing (2).
7. Flow control device for an oxygen system according to claim 1, characterized in that the end of the first outlet nipple (16) connected to the lower chamber housing (2) is provided with a first sizing hole (15), and the end of the first sizing hole (15) connected to the flow channel B is provided with a third sealing ring (21).
8. Flow control device for an oxygen system according to claim 1, characterized in that the end of the second outlet nipple (18) connected to the lower chamber housing (2) is provided with a second sizing hole (17), and the end of the second sizing hole (17) connected to the flow channel C is provided with a fourth sealing ring (20).
9. Flow control device for an oxygen system according to claim 1, characterized in that steel balls (19) for flow sealing are arranged in the flow channels a, C, D.
10. An oxygen system comprising the flow control device (26) of any one of claims 1 to 9, further comprising: an oxygen generator (22), an oxygen storage device (23) provided with a pressure reducer (24), an oxygen source conversion device (25), a three-way valve (27) and a using device (28), wherein,
The oxygen generating device (22) and the oxygen storage device (23) are respectively connected with the inlet connector (1) of the flow control device (26) through the oxygen source conversion device (25), and the first outlet connector (16) and the second outlet connector (18) of the flow control device (26) are respectively connected with the using equipment (28) through the three-way valve (27).
CN202410567993.4A 2024-05-09 2024-05-09 Flow control device applied to oxygen system Pending CN118328173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410567993.4A CN118328173A (en) 2024-05-09 2024-05-09 Flow control device applied to oxygen system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410567993.4A CN118328173A (en) 2024-05-09 2024-05-09 Flow control device applied to oxygen system

Publications (1)

Publication Number Publication Date
CN118328173A true CN118328173A (en) 2024-07-12

Family

ID=91769195

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410567993.4A Pending CN118328173A (en) 2024-05-09 2024-05-09 Flow control device applied to oxygen system

Country Status (1)

Country Link
CN (1) CN118328173A (en)

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