Triple-redundancy oxygen partial pressure detection device for airborne oxygen production equipment

Abstract

The utility model discloses a tri-redundancy oxygen partial pressure detection device for airborne oxygen production equipment, which comprises an oxygen partial pressure sensor, an air inlet joint, an air outlet joint and a mounting seat, the air inlet joint and the air outlet joint are respectively mounted on the mounting seat, and three partial pressure cavities are arranged on the mounting seat. Sensing parts of the three oxygen partial pressure sensors are respectively arranged in the three partial pressure cavities and are in sealed connection, each partial pressure cavity is provided with an air inlet and an air outlet, an air inlet channel and an air outlet channel are arranged in the mounting seat, an inlet of the air inlet channel is connected with the air inlet connector, three outlets of the air inlet channel are respectively connected with the air inlets of the three partial pressure cavities, and the air outlet of the air outlet channel is connected with the air outlet connector. Air outlets of the three partial pressure cavities are connected with three inlets of the air outlet channel respectively, and an outlet of the air outlet channel is connected with the air outlet connector. The defect that the oxygen partial pressure detection function cannot be achieved when one oxygen partial pressure sensor breaks down is overcome, the operation reliability of equipment is improved, a pilot is protected, and the flight work efficiency cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oxygen partial pressure detection device, especially a three-redundancy oxygen partial pressure detection device for airborne oxygen generating equipment. BACKGROUND

[0002] With the rapid development of sensor technology, more and more sensors are used in oxygen systems, such as oxygen partial pressure sensors, pressure sensors, temperature sensors, and physiological parameter sensors. Among them, the oxygen partial pressure sensor is generally used to detect the oxygen partial pressure (i.e. oxygen partial pressure, although the oxygen concentration in the oxygen product is very high, there is still a small amount of carbon dioxide gas) in the oxygen concentrator finished product oxygen (generally an oxygen generating assembly integrating a molecular sieve cylinder and an oxygen storage cylinder). That is, a small amount of finished product oxygen is introduced through an independent channel and the oxygen pressure therein is detected to achieve the purpose of detecting the oxygen partial pressure in the oxygen concentrator finished product oxygen. For example, airborne oxygen generating equipment uses an oxygen partial pressure sensor to detect the oxygen partial pressure in the oxygen concentrator finished product oxygen. Currently, the most commonly used is a zirconia oxygen partial pressure sensor, which was developed based on the discovery by Nernst in 1989 that stable zirconia exhibits ionic conductivity at high temperatures.

[0003] The traditional airborne oxygen generating equipment only uses one oxygen partial pressure sensor for detection, which has the following defects: when the oxygen partial pressure sensor fails, the pilot cannot observe the oxygen partial pressure value of the finished product oxygen in real time, and in order to ensure his own physiological safety, he must descend the flight altitude and stop the flight task, which will greatly affect the flight efficiency. SUMMARY

[0004] The purpose of the utility model is to solve the above problems by providing a three-redundancy oxygen partial pressure detection device for airborne oxygen generating equipment that integrates three oxygen partial pressure sensors.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A three-redundancy oxygen partial pressure detection device for airborne oxygen generating equipment, comprising an oxygen partial pressure sensor, an air inlet connector and an air outlet connector, further comprising a mounting seat, the air inlet connector and the air outlet connector are respectively mounted on the mounting seat, the mounting seat is provided with three partial pressure cavities, the sensing parts of the three oxygen partial pressure sensors are respectively placed in the three partial pressure cavities and are sealingly connected, each partial pressure cavity is provided with an air inlet and an air outlet, the mounting seat is provided with an air inlet channel and an air outlet channel, the inlet of the air inlet channel is connected with the air inlet connector, the three outlets of the air inlet channel are respectively connected with the air inlets of the three partial pressure cavities, the air outlets of the three partial pressure cavities are respectively connected with the three inlets of the air outlet channel, and the outlet of the air outlet channel is connected with the air outlet connector.

[0007] As preferred, in order to limit the flow and filter the oxygen entering the partial pressure cavity to further improve the oxygen partial pressure detection accuracy, the gas inlet of the partial pressure cavity is installed with a flow limiting orifice valve through a compression nut, the large diameter end of the flow limiting orifice valve is provided with an inner cavity and a sintered copper filter element is installed in the inner cavity, and the small diameter end of the flow limiting orifice valve is in communication with the inner cavity corresponding to the partial pressure cavity.

[0008] As preferred, in order to improve the sealing performance in the partial pressure cavity, a filter element sealing gasket is arranged between the large diameter end of the flow limiting orifice valve and the corresponding outlet of the gas inlet channel.

[0009] As preferred, in order to facilitate the installation of the oxygen partial pressure sensor and improve the sealing performance in the partial pressure cavity, the middle part of the oxygen partial pressure sensor is provided with an outwardly protruding mounting convex ring, the mounting convex ring is arranged at the opening end of the corresponding partial pressure cavity and connected through a mounting screw, and a cavity sealing gasket is arranged between the mounting convex ring and the opening end of the corresponding partial pressure cavity.

[0010] As preferred, in order to improve the heat insulation effect between the oxygen partial pressure sensor and the outside, a heat insulation sleeve is installed on each of the mounting convex rings, the non-induction part of the oxygen partial pressure sensor is located in the corresponding heat insulation sleeve, and the signal end of the oxygen partial pressure sensor passes through the corresponding through hole on the corresponding heat insulation sleeve.

[0011] The beneficial effects of the present application are as follows:

[0012] The three oxygen partial pressure sensors are integrated on the mounting seat and arranged in the three partial pressure cavities, the three partial pressure cavities are in communication with the same gas inlet channel and the same gas outlet channel, the three oxygen partial pressure sensors can work together, the oxygen partial pressure detection accuracy can be improved by averaging the three detection results, the three oxygen partial pressure sensors can also work partially and be used as backup, and after one or two oxygen partial pressure sensors fail, the backup sensor can be used to continue to realize the oxygen partial pressure detection function, thereby avoiding the problem that the oxygen partial pressure detection function cannot be realized due to the failure of one oxygen partial pressure sensor, improving the equipment operation reliability, better protecting the physiological safety of the pilot, and not affecting the flight work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the three-redundancy oxygen partial pressure detection device for the airborne oxygen generating equipment according to the present application;

[0014] Figure 2 is one of the front view cross-sectional views of the three-redundancy oxygen partial pressure detection device for the airborne oxygen generating equipment according to the present application, and the cross-sectional position is on the center line of the gas inlet channel;

[0015] Figure 3 isFigure 2 A-A cross-sectional view in the figure;

[0016] Figure 4 is the second main sectional view of the three-redundancy oxygen partial pressure detection device for airborne oxygen generation equipment, and the cross-sectional position is on the center line of the gas outlet channel. DETAILED DESCRIPTION

[0017] The utility model will be further described below with reference to the drawings:

[0018] As Figures 1-4 shown, the three-redundancy oxygen partial pressure detection device for airborne oxygen generation equipment includes oxygen partial pressure sensors 1, gas inlet joints 8, gas outlet joints 7 and mounting seats 6, the gas inlet joints 8 and the gas outlet joints 7 are respectively installed on the mounting seats 6, three partial pressure cavities 5 are arranged on the mounting seats 6, the sensing parts of the three oxygen partial pressure sensors 1 are respectively arranged in the three partial pressure cavities 5 and are sealingly connected, each partial pressure cavity 5 is provided with a gas inlet and a gas outlet, the mounting seat 6 is provided with a gas inlet channel 9 and a gas outlet channel 15, the inlet of the gas inlet channel 9 is connected with the gas inlet joint 8, the three outlets of the gas inlet channel 9 are respectively connected with the gas inlets of the three partial pressure cavities 5, the gas outlets of the three partial pressure cavities 5 are respectively connected with the three inlets of the gas outlet channel 15, and the outlet of the gas outlet channel 15 is connected with the gas outlet joint 7.

[0019] As Figures 1-4 shown, the utility model also discloses the following more optimized specific structures:

[0020] In order to flow limiting and filter the oxygen into the partial pressure cavity 5 to further improve the oxygen partial pressure detection precision, the gas inlet of the partial pressure cavity 5 is installed with a flow limiting hole valve 10 through a compression nut 12, the large-diameter end of the flow limiting hole valve 10 is provided with an inner cavity, and a sintered copper filter element 11 is installed in the inner cavity, and the small-diameter end of the flow limiting hole valve 10 is in communication with the inner cavity of the corresponding partial pressure cavity 5.

[0021] In order to improve the sealing performance in the partial pressure cavity 5, the filter element sealing gasket 13 is arranged between the large-diameter end of the flow limiting hole valve 10 and the corresponding outlet of the gas inlet channel 9.

[0022] In order to facilitate the installation of the oxygen partial pressure sensor 1 and improve the sealing performance in the partial pressure cavity 5, the middle part of the oxygen partial pressure sensor 1 is provided with an installation convex ring 3 protruding outward in the peripheral direction, the installation convex ring 3 is arranged at the open end of the corresponding partial pressure cavity 5 and is connected through a mounting screw, and the cavity sealing gasket 4 is arranged between the installation convex ring 3 and the open end of the corresponding partial pressure cavity 5.

[0023] In order to improve the heat insulation effect between the oxygen partial pressure sensor 1 and the outside, a heat insulation sleeve 2 is arranged on each mounting convex ring 3, the non-induction part of the oxygen partial pressure sensor 1 is located in the corresponding heat insulation sleeve 2, and the signal end of the oxygen partial pressure sensor 1 passes through the corresponding through hole in the corresponding heat insulation sleeve 2.

[0024] Figure 3 The connecting inclined hole 14 arranged on the cavity wall of the partial pressure cavity 5 is also shown, which is used for connecting the partial pressure cavity 5 with the corresponding gas outlet channel 15, and is a conventional structure.

[0025] As shown in Figures 1-4 In application, the gas inlet joint 8 is connected with the oxygen outlet of the oxygen concentrator (not shown in the figure) of the airborne oxygen generating equipment through the partial pressure gas pipe, only a small part of the oxygen product of the oxygen concentrator is branched out, the oxygen product sequentially passes through the gas inlet joint 8, the gas inlet channel 9, the partial pressure cavity 5 and the gas outlet joint 7, the gas outlet joint 7 is suspended, that is, the oxygen directly discharged after detection is directly discharged into the cabin; the signal line of the oxygen partial pressure sensor 1 is connected with the external controller; one, two or three oxygen partial pressure sensors 1 are opened, the branched oxygen product is detected, and the detection result is transmitted to the controller for use by the user.

[0026] The above embodiment is only a preferred embodiment of the present application, and is not a limitation on the technical scheme of the present application. Any technical scheme realized on the basis of the above embodiment without creative labor should be considered to fall within the protection scope of the present application.

Claims

1. A redundant oxygen partial pressure detection device for airborne oxygen generators, comprising an oxygen partial pressure sensor, an inlet connector, and an outlet connector, characterized in that: It also includes a mounting base, on which the air inlet connector and the air outlet connector are respectively mounted. The mounting base is provided with three pressure-particulate chambers. The sensing parts of the three oxygen partial pressure sensors are respectively placed in the three pressure-particulate chambers and sealed together. Each pressure-particulate chamber is provided with an air inlet and an air outlet. The mounting base is provided with an air inlet channel and an air outlet channel. The inlet of the air inlet channel is connected to the air inlet connector. The three outlets of the air inlet channel are respectively connected to the air inlets of the three pressure-particulate chambers. The air outlets of the three pressure-particulate chambers are respectively connected to the three inlets of the air outlet channel. The outlet of the air outlet channel is connected to the air outlet connector.

2. The triple-redundancy oxygen partial pressure detection device for airborne oxygen generators according to claim 1, characterized in that: The air inlet of the pressure-reducing chamber is fitted with a flow-limiting orifice valve via a clamping nut. The large-diameter end of the flow-limiting orifice valve has an inner cavity in which a sintered copper filter element is installed. The small-diameter end of the flow-limiting orifice valve is connected to the inner cavity of the corresponding pressure-reducing chamber.

3. The triple-redundancy oxygen partial pressure detection device for airborne oxygen generators according to claim 2, characterized in that: A filter element sealing gasket is provided between the large-diameter end of the flow-limiting orifice valve and the corresponding outlet of the air intake channel.

4. The triple-redundancy oxygen partial pressure detection device for airborne oxygen generators according to any one of claims 1-3, characterized in that: The oxygen partial pressure sensor has a mounting protrusion in the middle that protrudes outward in the circumferential direction. The mounting protrusion is placed at the opening end of the corresponding pressure-particulate cavity and connected by a mounting screw. A cavity sealing gasket is provided between the mounting protrusion and the opening end of the corresponding pressure-particulate cavity.

5. The triple-redundancy oxygen partial pressure detection device for airborne oxygen generators according to claim 4, characterized in that: Each of the mounting protrusions is fitted with a heat insulation sleeve, the non-inductive part of the oxygen partial pressure sensor is located inside the corresponding heat insulation sleeve, and the signal end of the oxygen partial pressure sensor passes through the corresponding through hole on the corresponding heat insulation sleeve.

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