Active protection device for preventing mistaken heating of airspeed tube

Abstract

The utility model relates to the technical field of airspeed tube protection, in particular to an active protection device for preventing mistaken heating of an airspeed tube, which comprises an atmosphere data measurement and control instrument, an airspeed tube airtight clamp, a heat-sensitive sensor arranged on the airspeed tube airtight clamp, and a quick-release cable plug connected with the heat-sensitive sensor, the airspeed tube airtight clamp is provided with a charging connector I and a charging connector II which are connected with the atmosphere data measurement and control instrument, and the quick-release cable plug is connected with the atmosphere data measurement and control instrument through an adapter cable. The device has the characteristics of convenience in use, simplicity in operation, suitability for field operators and the like; the temperature of the contact surface of the airspeed tube and the airtight clamp is detected, and at the initial stage of false heating of the airspeed tube, the deflation module of the atmosphere data measurement and control instrument is started in time, the airspeed value is rapidly reduced, and the automatic heating condition of the airspeed tube is eliminated, so that the intrinsic safety of the airspeed tube and the airtight clamp in the using process is realized.

Description

Technical Field

[0001] This utility model relates to the field of pitot tube protection technology, specifically an active protection device to prevent the pitot tube from being accidentally heated. Background Technology

[0002] The pitot tube installed on an aircraft measures the total and static pressure of the incoming airflow. Calculations based on this information yield parameters such as airspeed and altitude, which are used for flight control and instrument display. At high altitudes, moisture in the airflow easily condenses and clogs the total and static pressure intakes, leading to errors in the calculation of airspeed and altitude parameters and affecting flight safety. Therefore, during normal operation, the pitot tube needs automatic heating based on the aircraft's flight-landing status and airspeed.

[0003] During ground maintenance and debugging of a certain type of aircraft, different total and static pressure parameters need to be provided through an atmospheric data monitoring and control instrument to simulate the aircraft's performance compliance under different speed and altitude conditions. However, during ground-based total and static pressure tests, especially during multi-disciplinary cross-operations, situations often occur where the heating switch is not turned off or the pitot tube is accidentally heated while the aircraft is in the air (it automatically heats up when the airspeed value reaches a certain set value), which melts the pitot tube clamp and damages the product.

[0004] Existing technologies primarily rely on operators observing and smelling the pitot tube melting during testing to take emergency measures and minimize losses caused by accidental heating. Therefore, there is a need to design an active protection device to prevent accidental pitot tube heating, technically eliminating the conditions that would lead to such heating and achieving inherent safety during ground testing. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model proposes an active protection device to prevent accidental heating of the pitot tube.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0007] An active protection device for preventing accidental heating of the pitot tube includes an air data monitoring and control instrument, an airtight clamp for the pitot tube, a thermal sensor mounted on the airtight clamp for the pitot tube, and a quick-release cable plug connected to the thermal sensor. The airtight clamp for the pitot tube is provided with an inflation nozzle I and an inflation nozzle II connected to the air data monitoring and control instrument. The quick-release cable plug is connected to the air data monitoring and control instrument via an adapter cable.

[0008] As a further improvement of this utility model, the atmospheric data measuring and control instrument includes a temperature monitoring module, an automatic gas release module, and a heating alarm module.

[0009] As a further improvement of the utility model, the atmospheric data measuring and controlling instrument is internally provided with a sound box, and has an over-temperature voice alarm function.

[0010] As a further improvement of the utility model, the airspeed tube airtight clamp comprises a metal shell in a cylindrical structure, a fluoroplastic lining arranged on the inner wall of the metal shell, the thermal sensitive sensor is internally arranged in the fluoroplastic lining, the inflation nozzle I is arranged on one side end of the metal shell, and the inflation nozzle II is arranged on the side wall of the metal shell.

[0011] As a further improvement of the utility model, the other side end of the metal shell is provided with a locking part.

[0012] As a further improvement of the utility model, one end of the inflation nozzle I and the inflation nozzle II is correspondingly connected with a hose I and a hose II, and the other end of the hose I and the hose II is connected to a total pressure air nozzle and a static pressure air nozzle on the atmospheric data measuring and controlling instrument.

[0013] As a further improvement of the utility model, the thermal sensitive sensor is connected with a connecting wire harness, and the other end of the connecting wire harness is connected with the quick-release cable plug.

[0014] As a further improvement of the utility model, the quick-release cable plug is connected with a lead-out wire harness, and the other end of the lead-out wire harness is connected with the adapter cable.

[0015] The utility model has the advantages of convenient use, simple operation, suitability for on-site operators and the like.

[0016] The utility model provides a kind of active protection device for preventing airspeed tube from being warmed up, with the characteristics of convenient use, simple operation, suitable for on-site operators to use, etc.

[0017] By detecting the temperature of the contact surface of the airspeed tube and the airtight clamp, the air data measuring and controlling instrument is started in time to release gas module at the initial stage of the airspeed tube being warmed up by mistake, so as to quickly reduce the airspeed value and eliminate the automatic warming condition of the airspeed tube, thereby realizing the intrinsic safety of the airspeed tube and its airtight clamp during use.

[0018] It has an alarm function when the airspeed tube is warmed up by mistake, actively reminds the ground operator to check and deal with the aircraft state, eliminates the condition of warming up, and continuously carries out ground test. ACCURACY OF DRAWINGS

[0019] The utility model will be further described below in combination with the drawings and examples:

[0020] Fig. 1 It is the structural schematic diagram of the utility model;

[0021] Fig. 2The utility model discloses hollow speed tube airtight fixture's structural diagram.

[0022] In the figure: 1, atmospheric data control instrument;2, hollow speed tube airtight fixture;3, hose I;4, hose II;5, lead wire harness;6, adapter cable;7, metal shell;8, fluoroplastic lining;9, locking part;10, inflation mouth I;11, inflation mouth II;12, heat-sensitive sensor;13, connecting wire harness;14, quick-release cable plug. Specific implementation

[0023] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with the drawings and examples.

[0024] As Figs. 1-2 The utility model discloses a kind of active protection devices for preventing hollow speed tube from being warmed, mainly by atmospheric data control instrument 1, hollow speed tube airtight fixture 2, hose I 3, hose II 4, lead wire harness 5, adapter cable 6 are formed.It is composed of metal shell 7, fluoroplastic lining 8, locking part 9, inflation mouth I 10, inflation mouth II 11, heat-sensitive sensor 12, connecting wire harness 13, quick-release cable plug 14 in the hollow speed tube airtight fixture 2.

[0025] The atmospheric data control instrument 1 is well designed for man-machine interface and software driver, including temperature monitoring module, automatic deflation module, warming alarm module.The atmospheric data control instrument 1 is built-in with speaker, with over-temperature voice alarm function, and the atmospheric data control instrument 1 is provided with full-pressure air nozzle and static pressure air nozzle outside, and the full-pressure air nozzle and static pressure air nozzle are connected with the hose I 3 and hose II 4 through threaded joint.

[0026] The metal shell 7 is in a cylindrical structure, the air speed pipe airtight clamp 2 is inserted into the air speed pipe of the airplane, the locking part 9 is arranged on the other side end of the metal shell 7, for fixing the air speed pipe airtight clamp 2 on the air speed pipe of the airplane, preventing the air speed pipe airtight clamp 2 from being separated from the air speed pipe during use, and causing the given atmospheric pressure on the airplane to be instantaneously decompressed. The fluoroplastic lining 8 is arranged on the inner wall of the metal shell 7, the fluoroplastic lining 8 has strong toughness and certain high-temperature resistance, and the use reliability and safety of the air speed pipe airtight clamp 2 are ensured. The inflation nozzle I 10 is arranged on the side end of the metal shell 7, and the inflation nozzle II 11 is arranged on the side wall of the metal shell 7 and connected with the hose I 3 and the hose II 4. The thermal sensor 12 is built in the fluoroplastic lining 8 and connected with the connecting wire harness 13, the connecting wire harness 13 is connected with the quick-release cable plug 14, the thermal sensor 12 is led out of the air speed pipe airtight clamp 2 through the connecting wire harness 13 and the quick-release cable plug 14, the quick-release cable plug 14 is connected with the leading wire harness 5, the leading wire harness 5 is connected with the adapter cable 6, and the adapter cable 6 is designed in a quick-release and automatic telescopic mode, so that the adapter cable 6 is convenient to disassemble, use at a long distance and store. The adapter cable 6 is connected with the socket on the atmospheric data measurement and control instrument 1, and the power required for the thermal sensor to work and the temperature value collected are provided.

[0027] The working principle and use process of the utility model are as follows:

[0028] When in use, the temperature of the outer surface of the air speed pipe is collected by the thermal sensor 12 built in the air speed pipe airtight clamp 2, the temperature is monitored by the temperature monitoring module in the atmospheric data measurement and control instrument 1, when the temperature exceeds the set value, in this embodiment, the set value is 70 DEG C, (the air speed pipe is in the initial stage of heating, and the temperature will not damage the air speed pipe airtight clamp), the automatic deflation module is triggered in time, the air speed value is rapidly reduced, and the automatic heating condition of the air speed pipe is eliminated, so that the intrinsic safety of the air speed pipe and the air speed pipe airtight clamp during use is realized, the given total pressure and static pressure are reduced to the initial value (the corresponding air speed value is at zero), and in this embodiment, the initial value of the total pressure and the static pressure is 101.3Kpa. According to the design principle of the airplane, when the air speed is at zero, the air speed is not greater than 160km / h, even if the airplane heating switch and the airplane state are in the flight mode, the air speed pipe will not be automatically heated, so that timely intervention and active protection are realized when the air speed pipe is mistakenly heated, and irreversible damage caused by the problem found afterwards is avoided. In addition, the heating alarm module is triggered synchronously, the voice is sent on the atmospheric data measurement and control instrument 1, and the heating alarm is displayed on the screen and flashes, prompting the ground operator to check and deal with the state of the airplane, and eliminating the condition of the air speed pipe being mistakenly heated.

[0029] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An active protection device against false heating of pitot tubes, characterized in that: The air data test and control instrument (1), the pitot tube airtight clamp (2), the thermal sensor (12) arranged on the pitot tube airtight clamp (2), and the quick-release cable plug (14) connected with the thermal sensor (12) are included.

2. An active protection device against false heating of pitot tubes according to claim 1, characterized in that: The air data test and control instrument (1) includes a temperature monitoring module, an automatic deflation module, and a warming alarm module.

3. An active protection device against false heating of pitot tubes according to claim 1, characterized in that: The air data test and control instrument (1) is provided with a built-in sound box and has an over-temperature voice alarm function.

4. An active protection device against false heating of pitot tubes according to claim 1, characterized in that: The pitot tube airtight clamp (2) includes a cylindrical metal shell (7) and a fluoroplastic lining (8) arranged on the inner wall of the metal shell (7).

5. An active protection device against false heating of pitot tubes according to claim 4, characterized in that: The thermal sensor (12) is built in the fluoroplastic lining (8).

6. An active protection device against false heating of pitot tubes according to claim 1, characterized in that: The metal shell (7) is provided with a locking component (9) on the other end.

7. An active protection device against false heating of pitot tubes according to claim 1, characterized in that: The air inlet nozzle I (10) and the air inlet nozzle II (11) are correspondingly connected with a hose I (3) and a hose II (4) at one end.

8. An active protection device against false heating of pitot tubes according to claim 1, characterized in that: The other end of the hose I (3) and the hose II (4) is connected to the total pressure air nozzle and the static pressure air nozzle on the air data test and control instrument (1). The thermal sensor (12) is connected with a connection wire harness (13), and the other end of the connection wire harness (13) is connected with the quick-release cable plug (14). The quick-release cable plug (14) is connected with a lead-out wire harness (5), and the other end of the lead-out wire harness (5) is connected with the adapter cable (6).

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