CN220221123U

CN220221123U - Safety conversion mechanism for airborne oxygen source

Info

Publication number: CN220221123U
Application number: CN202321762893.4U
Authority: CN
Inventors: 宗慕洲; 黄岩毅; 严浩; 陈为伦; 车华; 王奇; 李凯; 秦世洋
Original assignee: Air Force Engineering University of PLA Aircraft Maintenace Management Sergeant School
Current assignee: Air Force Engineering University of PLA Aircraft Maintenace Management Sergeant School
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2023-12-22
Anticipated expiration: 2033-07-06

Abstract

The utility model provides an airborne oxygen source safety conversion mechanism which comprises a shell, wherein a main oxygen source assembly is arranged on the outer side of a vertical part on one side of the shell, the main oxygen source assembly comprises a main oxygen source inlet arranged on the outer side wall of the vertical part on one side of the shell, a first one-way valve is arranged on the inner side of the main oxygen source inlet, an air source cavity and a pressure relief cavity which are mutually independent are arranged in the shell, a first opening and closing valve mechanism is arranged in the shell, a second opening and closing valve mechanism is arranged on the upper part of a horizontal part of the shell, an electromagnetic valve mechanism is arranged on the left side of the second opening and closing valve mechanism, and the electromagnetic valve mechanism and a standby oxygen source are connected together through a second one-way valve. The utility model can realize safe and reliable conversion of the onboard oxygen production main oxygen source and the high-pressure pure oxygen standby oxygen source by matching the main oxygen source component with the standby oxygen source component, thereby avoiding oxygen leakage, and having simple structure and safer and more convenient use.

Description

Safety conversion mechanism for airborne oxygen source

Technical Field

The utility model relates to the technical field of air oxygen supply, in particular to an airborne oxygen source safety switching mechanism.

Background

With the development of high-performance aircrafts, the aircraft dead time is longer and longer, and the oxygen supply mode of filling oxygen by using a ground oxygen cylinder in the past can not meet the requirements of modern airtime of the aircraft, and in addition, the mode can not meet the requirements of quick operation of the aircraft. The modern high-performance aircraft mostly adopts airborne autonomous oxygen production as a main oxygen source to provide oxygen for pilots, but as the concentration of the autonomous oxygen production can not reach 100%, pure oxygen can not be provided for the pilots when the flying height is higher, oxygen deficiency of the pilots is easily caused when the autonomous oxygen production fails, and the flying safety is influenced, so that the modern aircraft is also generally provided with an oxygen cylinder to charge pure oxygen as a standby oxygen source. The automatic conversion is realized according to the flying height and the fault condition of the main oxygen source between the main oxygen source and the standby oxygen source, and the oxygen source conversion mechanism used at present has the phenomenon of oxygen leakage when converting into the standby oxygen source, so that the oxygen concentration around the conversion mechanism is increased, and the potential safety hazard is caused.

Disclosure of Invention

In view of this, the utility model provides a safety conversion mechanism for airborne oxygen source, which can realize the safe and reliable conversion of the main oxygen source for airborne oxygen production and the standby oxygen source for high-pressure pure oxygen through the main oxygen source component and the standby oxygen source component, and avoid the leakage of oxygen, and has simple structure and safer and more convenient use.

In order to solve the technical problems, the utility model provides an airborne oxygen source safety switching mechanism, which comprises a shell, wherein a main oxygen source assembly is arranged on the outer side of a vertical part on one side of the shell, the main oxygen source assembly comprises a main oxygen source inlet arranged on the outer side wall of the vertical part on one side of the shell, a first one-way valve is arranged on the inner side of the main oxygen source inlet, a first compression spring is arranged on the inner side of the first one-way valve, a standby oxygen source outlet communicated with an air inlet of an aircraft cabin is arranged on the outer side wall of the vertical part on the other side of the shell, a standby oxygen source inlet is arranged on the lower part of the horizontal part of the shell, an air source cavity and a pressure relief cavity which are mutually independent are arranged in the shell, a first opening and closing valve mechanism is arranged in the shell, a second opening and closing mechanism is arranged on the upper part of the horizontal part of the shell, and an electromagnetic valve is arranged on the left side of the second opening and closing mechanism.

According to the utility model, the inner cavity of the shell is divided into the air source cavity and the pressure relief cavity which are independent of each other through the first diaphragm, the first diaphragm controls the first one-way valve in the oxygen source inlet to be in a closed state through the pressure difference generated by the air source cavity and the pressure relief cavity and the restoring elasticity of the first compression spring, when the aircraft flies at low altitude, the air pressure is high, the air pressure entering the main oxygen source inlet overcomes the elasticity of the first compression spring to open the first one-way valve, the air enters the cabin of the aircraft through the standby oxygen outlet to supply oxygen to the cabin, when the aircraft flies at high altitude, the air pressure is low, after the air pressure is converted into the standby oxygen source, the standby oxygen pressure and the restoring elasticity of the first spring are larger than the air pressure, at the moment, the first one-way valve is closed, and then the main oxygen source oxygen supply pipeline is cut off, at the moment, the standby oxygen enters the air source cavity through the standby oxygen source inlet below the shell, enters the cabin of the aircraft through the standby oxygen source outlet to supply oxygen.

The first opening and closing valve mechanism comprises a first diaphragm, a first connecting rod, a first valve and a second compression spring, wherein the first diaphragm divides the inside of the shell into an air source cavity and a pressure relief cavity which are mutually independent, the first diaphragm and the first valve are fixedly connected together through the first connecting rod, and the second compression spring is arranged on the upper portion of the first valve and the upper portion of the first diaphragm.

The second opening and closing valve mechanism comprises a second diaphragm, a second connecting rod, a second valve and a third compression spring, wherein the second diaphragm and the second valve are fixedly connected together through the second connecting rod, and the third compression spring is arranged on the upper portion of the second valve and the upper portion of the second diaphragm.

The upper part of the electromagnetic valve is provided with a fourth compression spring, and the upper part of the valve seat of the electromagnetic valve is provided with a control coil.

The standby oxygen source outlet is provided with a second one-way valve, and the upper part of the second one-way valve is provided with a fifth compression spring

The standby oxygen source inlet comprises two pipelines, one pipeline is communicated with the first one-way valve and flows into the air source cavity, the other pipeline flows into the pressure relief cavity, the pipeline at the outlet of the pressure relief cavity is divided into two pipelines, one pipeline is communicated with the second opening and closing valve mechanism, the other pipeline is communicated with the electromagnetic valve mechanism, and a flow limiting cavity is arranged in the pipeline of the standby oxygen source flowing through the pressure relief cavity.

The utility model introduces oxygen into the standby oxygen source inlet, and the pipeline connected with the first opening and closing valve mechanism makes the first valve leave the valve seat against the elasticity of the second compression spring, so that the pipeline is communicated with the atmosphere, the other pipeline of the pressure release cavity outlet pipeline is connected with the electromagnetic valve, the electromagnetic valve is controlled by the control coil and the fourth compression spring, the electromagnetic valve outlet is connected with the second opening and closing valve mechanism and is connected with the second one-way valve through the pipeline, and the second one-way valve is kept closed under the action of the restoring elasticity of the fifth compression spring.

In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

1. through the cooperation of first opening and closing valve mechanism and second opening and closing valve mechanism, after switching reserve oxygen is once released, first opening and closing valve can be closed, prevents that high pressure pure oxygen from leaking, causes local environment oxygen concentration to rise, avoids taking place the incident.

2. Through the cooperation of first check valve mechanism and second check valve mechanism, both can supply the pilot with the pure oxygen that the pressure release chamber flowed out, saved oxygen, can prevent again that the high-pressure oxygen that flows out from the oxygen source chamber from flowing back to the pressure release chamber, guarantee the inside oxygen suppliment that lasts of aircraft.

3. The onboard oxygen source conversion mechanism has the advantages of simple structure, capability of preventing oxygen leakage, higher safety performance, realization of reliable conversion of an onboard oxygen generation main oxygen source and a high-pressure pure oxygen standby oxygen source, and safer operation.

4. This airborne oxygen source conversion mechanism uses the aircraft to fly under various altitudes and can guarantee to carry out the oxygen suppliment continuously in the cockpit, when low altitude flight, the effect of atmospheric pressure can promote to open first one-way valve mechanism, at this moment, air gets into the air source chamber through main oxygen source entry, in getting into the cabin of aircraft through reserve oxygen source entry, continuously the oxygen suppliment in the cabin, when high altitude flies, atmospheric pressure is less, first one-way valve mechanism can be closed to the effect of the resilience force of first compression spring, at this moment, the entry of reserve oxygen source is opened in electromagnetic valve mechanism control, reserve oxygen source carries out the oxygen suppliment continuously in aircraft cabin.

Drawings

FIG. 1 is a schematic diagram of the safety switching mechanism for airborne oxygen source according to the present utility model.

Reference numerals illustrate: 100. a housing; 101. an air source cavity; 102. a pressure relief cavity; 200. a main oxygen source assembly; 201. a main oxygen source inlet; 202. a first check valve; 203. a first compression spring; 300. A standby oxygen source inlet; 400. a standby oxygen source outlet; 500. a first shutter opening and closing mechanism; 501. a first membrane; 502. a first link; 503. a first shutter; 504. a second compression spring; 600. a second shutter opening and closing mechanism; 601. a second membrane; 602. a second link; 603. a second shutter; 604. a third compression spring; 700. an electromagnetic valve; 701. a fourth compression spring; 702. a control coil; 800. A second check valve; 801. a fifth compression spring; 900. a flow-limiting chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the utility model, fall within the scope of protection of the utility model.

As shown in fig. 1: the embodiment provides an airborne oxygen source safety switching mechanism, which comprises a shell 100, wherein a main oxygen source assembly 200 is arranged outside a vertical part on one side of the shell 100, the main oxygen source assembly 200 comprises a main oxygen source inlet 201 arranged on the outer side wall of the vertical part on one side of the shell 100, a first check valve 202 is arranged on the inner side of the main oxygen source inlet 201, a first compression spring 203 is arranged on the inner side of the first check valve 202, a standby oxygen source outlet 400 communicated with an air inlet of an aircraft cabin is arranged on the outer side wall of the vertical part on the other side of the shell 100, a standby oxygen source inlet 300 is arranged on the lower part of the horizontal part of the shell 100, an air source cavity 101 and a pressure relief cavity 102 which are mutually independent are arranged in the shell 100, a first opening and closing valve mechanism 500 is arranged in the shell 100, a second opening and closing valve mechanism 600 is arranged on the upper part of the horizontal part of the shell 100, the electromagnetic valve 700 is arranged at the left side of the second opening and closing valve mechanism 600, the inner cavity of the shell 100 is divided into the air source cavity 101 and the pressure relief cavity 102 which are mutually independent through the first diaphragm 501, the first diaphragm 501 controls the first one-way valve 202 in the oxygen source inlet to be in a closed state through the pressure difference generated by the air source cavity 101 and the pressure relief cavity 102 and the restoring elasticity of the first compression spring 203, when the aircraft flies at low altitude, the air pressure is high, the air pressure entering the main oxygen source inlet 201 overcomes the elasticity of the first compression spring 203 to open the first one-way valve 202, the air enters the cabin of the aircraft through the standby oxygen outlet to supply oxygen to the cabin, when the aircraft flies at high altitude, the air pressure is low, after being converted into the standby oxygen source, the standby oxygen pressure and the restoring elasticity of the first spring are higher than the air pressure, at the moment, the first one-way valve 202 is closed, and then cuts off the main oxygen source oxygen supply pipeline, at this time, the standby oxygen enters the air source cavity 101 through the standby oxygen source inlet 300 below the shell 100, and enters the cabin of the aircraft through the standby oxygen source outlet 400 to supply oxygen to the interior of the aircraft.

According to one embodiment of the present utility model, as shown in fig. 1, the first opening and closing shutter mechanism 500 includes a first diaphragm 501, a first link 502, a first shutter 503 and a second compression spring 504, the first diaphragm 501 divides the interior of the housing 100 into the air source chamber 101 and the pressure release chamber 102 which are independent from each other, the first diaphragm 501 and the first shutter 503 are fixedly connected together through the first link 502, and the second compression spring 504 is disposed on the upper portion of the first shutter 503 and on the upper portion of the first diaphragm 501. The first diaphragm 501 controls the first check valve 202 and the second compression spring 504 of the main oxygen source inlet 201 through the pressure difference generated by the air source cavity 101 and the pressure release cavity 102 and the restoring elasticity of the first compression spring 203, the main oxygen source pressure overcomes the restoring elasticity of the first compression spring 203 to open the first check valve 202, oxygen is supplied, and after the oxygen is converted into standby oxygen, the standby oxygen pressure and the elasticity of the first compression spring 203 can close the first check valve 202, and the main oxygen source oxygen supply pipeline is cut off.

According to one embodiment of the present utility model, as shown in fig. 1, the second opening and closing shutter mechanism 600 includes a second diaphragm 601, a second link 602, a second shutter 603, and a third compression spring 604, wherein the second diaphragm 601 and the second shutter 603 are fixedly connected together through the second link 602, and the third compression spring 604 is disposed at an upper portion of the second shutter 603 and at an upper portion of the second diaphragm 601. The standby oxygen source inlet 300 comprises two pipelines, one pipeline is communicated with the first one-way valve 202 and flows into the air source cavity 101, the other pipeline flows into the pressure relief cavity 102, the outlet pipeline of the pressure relief cavity 102 is divided into two pipelines, one pipeline is communicated with the second opening and closing valve mechanism 600, the other pipeline is communicated with the electromagnetic valve 700 mechanism, and a flow limiting cavity 900 is arranged inside the pipeline of the standby oxygen source flowing through the pressure relief cavity 102. The second diaphragm 601 isolates the pressure relief pipeline from the outside, the lower end of the second diaphragm 601 bears the pressure of the air in the pressure relief cavity 102, the second diaphragm 601 is pushed to move upwards, the second valve 603 overcomes the restoring elasticity of the third compression spring 604, and the second valve leaves the valve seat to enable the pipeline to be communicated with the atmosphere.

According to one embodiment of the present utility model, as shown in fig. 1, oxygen is introduced into the standby oxygen source inlet 300, and the first valve 503 is separated from the valve seat against the elastic force of the second compression spring 504 by the pipeline connected with the first opening and closing valve mechanism 500, so that the pipeline is communicated with the atmosphere, and the other pipeline at the outlet of the pressure release cavity 102 is connected with the electromagnetic valve 700; the electromagnetic valve 700 is controlled by the control coil 702 and the fourth compression spring 701, the standby oxygen source outlet 400 is provided with a second one-way valve 800, the upper part of the second one-way valve 800 is provided with a fifth compression spring 801, the outlet of the electromagnetic valve 700 is connected with the second opening and closing valve mechanism 600, the upper part of the electromagnetic valve 700 is provided with the fourth compression spring 701, the upper part of the valve seat of the electromagnetic valve 700 is provided with the control coil 702, and the electromagnetic valve 700 is controlled by the control coil 702 and the fourth compression spring 701; the outlet of the electromagnetic shutter 700 is connected to the shutter seat of the second opening/closing shutter, and is connected to the second check shutter 800 through a pipe, and the second check shutter 800 is kept closed by the restoring elastic force of the fifth compression spring 801.

The working principle of the utility model is as follows:

the high-pressure pure oxygen at the standby oxygen inlet is divided into two paths, one path overcomes the elasticity of the second compression spring 504 to open the first valve 503 to enter the oxygen source cavity, the other path passes through the flow limiting cavity 900 to enter the pressure releasing cavity 102, when the standby oxygen is not converted, the electromagnetic valve 700 is closed, the pressure in the pressure releasing cavity 102 gradually rises and acts on the first diaphragm 501, when the pressure rises to be equal to the pressure of the oxygen source cavity, the pressure borne by the first diaphragm 501 and the elasticity of the second compression spring 504 enable the first one-way valve 202 to close the standby oxygen inlet, the high-pressure oxygen enters the lower end of the second diaphragm 601 of the second valve 603 mechanism in the pressure releasing cavity 102 through the pipeline where the flow limiting cavity 900 is located, the second diaphragm 601 drives the second one-way valve 800 through the second connecting rod 602 to move upwards against the recovery elasticity of the third spring, and accordingly the second open and close door cavity is communicated with the atmosphere. During normal oxygen supply, oxygen entering through the main oxygen source inlet 201 overcomes the restoring elasticity of the first compression spring 203 to open the first one-way valve 202, enters the oxygen source cavity, and flows out from the standby oxygen source outlet 400 to supply oxygen to an aircraft cabin occupant. When the standby oxygen needs to be converted, the electromagnetic coil receives a control signal to generate electromagnetic force, the electromagnetic force overcomes the restoring elasticity of the fourth compression spring 701, the electromagnetic valve 700 is opened, the pressure in the pressure release cavity 102 enters the cavity of the second opening and closing valve through the lower cavity of the electromagnetic valve 700, the pressure in the pressure release cavity 102 is discharged to the atmosphere through opening the cavity of the second opening and closing valve, the pressure in the pressure release cavity 102 is discharged due to the current limiting effect of the current limiting cavity 900, the pressure below the first diaphragm 501 is higher than the pressure above, the first diaphragm 501 moves upwards, the standby oxygen overcomes the restoring elasticity of the second spring to open the first valve 503, and the standby oxygen enters the oxygen source cavity. Because the standby oxygen pressure is greater than the main oxygen source pressure, the first check valve 202 is closed under the standby oxygen pressure and the restoring force of the first compression spring 203, and the main oxygen source enters the oxygen source cavity, thereby realizing the conversion of the oxygen source. After the pressure release cavity 102 is depressurized, the lower end of a second diaphragm 601 of the second valve 603 mechanism is opened and closed, under the action of the restoring elastic force of a third compression spring 604, the second opening and closing valve is closed, and part of oxygen flowing into the pressure release cavity 102 through the flow limiting cavity 900 flows into the oxygen source outlet through the opened electromagnetic valve 700 and the second opening and closing valve cavity, and the second one-way valve 800 is opened against the restoring elastic force of a fifth compression spring 801 to flow into the oxygen source outlet and supply oxygen together with the oxygen source cavity. In the switching process, when the pressure of the pressure release cavity 102 rises, the first valve 503 is opened and released again, so that the first valve 503 is ensured to be in an opened state. When the standby oxygen is not needed, no control signal exists in the electromagnetic coil, the electromagnetic valve 700 is closed under the action of the restoring elastic force of the fourth compression spring 701, the pressure of the pressure release cavity 102 rises again and acts on the first diaphragm 501, when the pressure of the pressure release cavity 102 is equal to the pressure of the oxygen source cavity, the first valve 503 closes the standby oxygen again, the first one-way valve 202 of the main oxygen source is opened again, and the oxygen source conversion is realized.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. An airborne oxygen source safety switching mechanism which is characterized in that: including casing (100), the vertical portion outside of one side of casing (100) is provided with main oxygen source subassembly (200), main oxygen source subassembly (200) are including setting up main oxygen source entry (201) on the vertical portion lateral wall of one side of casing (100), the inboard of main oxygen source entry (201) is provided with first check valve (202), the inboard of first check valve (202) is provided with first compression spring (203), be provided with on the vertical portion lateral wall of opposite side of casing (100) with the reserve oxygen source export (400) that the air inlet in cabin of aircraft is linked together, the horizontal part lower part of casing (100) is provided with reserve oxygen source entry (300), the inside of casing (100) is provided with mutually independent air source chamber (101) and pressure release chamber (102), the inside of casing (100) is provided with first shutter mechanism (500), the horizontal portion upper portion of casing (100) is provided with second shutter mechanism (600), the left side of second shutter mechanism (600) is provided with electromagnetism shutter mechanism (700).

2. The airborne oxygen safety switching mechanism of claim 1, wherein: the first opening and closing valve mechanism (500) comprises a first diaphragm (501), a first connecting rod (502), a first valve (503) and a second compression spring (504), wherein the first diaphragm (501) divides the interior of the shell (100) into an air source cavity (101) and a pressure release cavity (102) which are mutually independent, the first diaphragm (501) and the first valve (503) are fixedly connected together through the first connecting rod (502), and the upper part of the first valve (503) is provided with a third compression spring (604) which is positioned on the upper part of the first diaphragm (501).

3. The airborne oxygen safety switching mechanism of claim 2, wherein: the second opening and closing valve mechanism (600) comprises a second diaphragm (601), a second connecting rod (602), a second valve (603) and a third compression spring (604), wherein the second diaphragm (601) and the second valve (603) are fixedly connected together through the second connecting rod (602), and the third compression spring (604) is arranged on the upper portion of the second valve (603) and is positioned on the upper portion of the second diaphragm (601).

4. The airborne oxygen safety switching mechanism of claim 3, wherein: a fourth compression spring (701) is arranged at the upper part of the electromagnetic valve (700), and a control coil (702) is arranged at the upper part of the valve seat of the second valve (603).

5. The airborne oxygen safety switching mechanism of claim 1, wherein: the standby oxygen source outlet (400) is provided with a second one-way valve (800), and the upper part of the second one-way valve (800) is provided with a fifth compression spring (801).

6. The safety switching mechanism for an on-board oxygen source according to claim 1 or 5, wherein: the outlet pipeline of the pressure release cavity (102) is divided into two paths, one path is communicated with the second opening and closing valve mechanism (600), and the other path is communicated with the electromagnetic valve (700) mechanism.

7. The airborne oxygen safety switching mechanism of claim 5 wherein: the standby oxygen source inlet (300) comprises two pipelines, one pipeline is communicated with the first one-way valve (202) and flows into the air source cavity (101), the other pipeline flows into the pressure relief cavity (102), and a flow limiting cavity (900) is arranged in the pipeline of the standby oxygen source flowing through the pressure relief cavity (102).