A hatch vent assembly testing apparatus

Abstract

The present application relates to a kind of detection adjustment equipment capable of completing starter exhaust assembly and cabin door off-site function detection in the installation debugging process of aircraft cabin door exhaust assembly.A kind of cabin door exhaust assembly detection equipment, the detection equipment is integrated on installation box, it includes operating panel and control circuit;Operating panel is connected with cabin door exhaust assembly by connecting cable, and it is provided with several switches, sockets and indicator lights;Control circuit includes AC / DC conversion power supply, relay and time delay relay, AC / DC conversion power supply converts the input 220V alternating current into 28V working direct current, when pressing switch, relay works, 28V working direct current is supplied to cabin door exhaust assembly by time delay relay, and cabin door starts to execute opening process or closing process, when cabin door opens or closes to place, corresponding indicator light is lit.The present application has the following advantages: 1, improve the safety of debugging work;2, can complete each function test.

Description

Technical Field

[0001] This invention relates to a testing and adjustment device capable of detecting the starter exhaust assembly and the door disengagement function during the installation and commissioning of an aircraft cabin door exhaust assembly. Background Technology

[0002] The primary function of the aircraft starter exhaust assembly is to open the exhaust hatch on the ground, ensuring the smooth discharge of starter exhaust gases outside the aircraft. The starter exhaust assembly is powered by the aircraft's 28V voltage and controlled by the emergency power control terminal according to the starter's starting logic, driving the exhaust hatch to open and close, and controlling the hatch's position.

[0003] The starter exhaust assembly and door are mounted on the large maintenance access cover on the lower fuselage of the aircraft. Adjusting the exhaust assembly and door (such as clearance, step difference, limit switches, and on / off position signals) requires high precision and is extremely complex. Due to space constraints, the adjustment process cannot be completed on-board; it necessitates repeated disassembly and reassembly of the large maintenance access cover on the fuselage for repeated adjustments and tests of the door's position. This method is extremely labor-intensive, carries certain safety risks, is time-consuming and labor-intensive, and does not provide comprehensive functional testing of the exhaust assembly, failing to test the on / off position signals of the exhaust assembly. Summary of the Invention

[0004] The purpose of this invention is to provide a hatch exhaust assembly testing device. The power supply and control logic on the simulator complete various tasks such as starter exhaust assembly and hatch displacement detection, hatch opening, closing, opening position indication, closing position indication, delay control, and adjustment of hatch gap and step difference.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hatch exhaust assembly detection device, the detection device being integrated into a mounting box, comprising an operation panel and a control circuit; the operation panel being connected to the hatch exhaust assembly via a connecting cable, and having several switches, sockets, and indicator lights; the control circuit comprising an AC / DC converter, a relay, and a time-delay relay, the AC / DC converter converting the input 220V AC power into 28V DC power, the relay activating when a switch is pressed, the 28V DC power supplying power to the hatch exhaust assembly via the time-delay relay, the hatch initiating an opening or closing process, and the corresponding indicator light illuminating when the hatch is fully opened or closed.

[0006] Preferably, the switch includes a device power switch, a DC power switch, a component open button, and a component close button; the device power switch is the main switch of the detection device, and the component open button and component close button are connected to the positive terminal of the AC / DC conversion power supply through the DC power switch, and the other end is connected to the door exhaust assembly through a relay and a time delay relay, respectively.

[0007] Preferably, the relay includes an opening relay and a closing relay, and the time delay relay includes an opening time delay relay and a closing time delay relay; when the switch is pressed, the opening relay or the closing relay operates, and the 28V operating DC power supplies power to the hatch exhaust assembly through the opening time delay relay or the closing time delay relay.

[0008] Preferably, the time delay relay is powered by an isolated power supply, which is a 28V to 24V isolated power supply.

[0009] Preferably, the time-delay relay is powered by an isolated power supply, which is a 28V to 12V isolated power supply.

[0010] Preferably, the indicator lights include an on-position light, a off-position light, and a working status indicator light; the on-position light is connected to the on-delay relay to display its working status; the off-position light is connected to the off-delay relay to display its working status; and the working status indicator light is connected to the AC / DC power supply to display the working status of the device.

[0011] Preferably, a magnetic switch is installed between pins D and E of the hatch exhaust assembly detection device. Pin D is the positive excitation terminal for the hatch being in position and open, and pin E is the negative excitation terminal for the hatch being in position and open. Pins D and E are used to supply power to the magnetic switch.

[0012] Preferably, the switch is a self-resetting switch.

[0013] Compared with the prior art, the present invention has the following advantages: 1. Solved the problems of starter exhaust assembly and hatch displacement detection and step clearance adjustment, improved the safety of commissioning work, avoided the heavy work of repeated disassembly and assembly of the large maintenance cover, and saved a lot of manpower and material resources. 2. It can complete various functional tests of the starting and exhaust components, and can more quickly identify the cause of the fault. Attached Figure Description

[0014] Figure 1 This is a principle block diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure and operation panel of an embodiment of the present invention; Figure 3 This is a schematic diagram of the control circuit according to an embodiment of the present invention; Figure 2 In the middle, 1. Control panel; 2. Connecting cable; 2-1. Door exhaust assembly connection end; 2-2. Testing equipment connection end; Figure 3In the diagram, K1 is the equipment power switch; K2 is the DC power switch; K3 is the magnetic switch; AN1 is the component open button; AN2 is the component close button; L1 is the position indicator light; J1 is the relay open; J2 is the relay close; KT1 is the time delay relay open; KT2 is the time delay relay close; L2 is the work light close; and L3 is the work status indicator light. Implementation

[0015] The following is in conjunction with the appendix Figures 1-3 The invention is further described in detail below: a hatch exhaust assembly testing device, said testing device being integrated into a mounting box, such as... Figures 1-2 As shown, it includes an operation panel 1 and a control circuit. The operation panel 1 is connected to the hatch exhaust assembly via a connecting cable 2, and is equipped with several switches, sockets, and indicator lights. The control circuit includes an AC / DC converter, a relay, and a time-delay relay. The AC / DC converter converts the input 220V AC power into 28V DC power. When a switch is pressed, the relay operates, and the 28V DC power supplies power to the hatch exhaust assembly through the time-delay relay. The hatch begins to execute the opening or closing process. When the hatch is fully opened or closed, the corresponding indicator light illuminates. The time-delay relay disconnects after a certain delay, and the detection device stops supplying power to the hatch exhaust assembly, thus stopping the hatch opening or closing process.

[0016] like Figure 2 As shown, the switches include a device power switch K1, a DC power switch K2, a component open button AN1, and a component close button AN2; the relays include an open relay J1 and a close relay J2, and the time delay relays include an open time delay relay KT1 and a close time delay relay KT2; the indicator lights include an open position light L1, a close working light L2, and a working status indicator light L3.

[0017] like Figure 3 As shown, the hatch exhaust assembly includes six pins: A, B, C, D, E, and F. Pin A is the positive terminal for the hatch motor opening; pin B is the positive terminal for the hatch motor closing; pin C is the negative terminal for the hatch motor; pin D is the positive terminal for the hatch being in position when open; pin E is the negative terminal for the hatch being in position when open; and pin F is the output signal for the hatch being in position when open.

[0018] like Figures 1-2As shown, connecting the detection equipment to the exhaust assembly and inputting 220V AC power, along with turning on the corresponding switch, controls the door exhaust assembly, enabling the door to open, close, and output position signals, as well as providing a delay protection function. A self-resetting switch is selected for the control, allowing for precise control of the door opening degree. To ensure safety, the power supply for each signal is set independently, consistent with the actual power supply of the aircraft. The delay protection is also set according to the aircraft's control logic, thus achieving a realistic detection environment and reliable safety protection.

[0019] Specifically, The door exhaust assembly testing equipment has a 220V AC input (equipment power switch K1 is turned on), which is converted to 28V DC power through an AC / DC converter (DC power switch K2 is turned on), and the L3 working status indicator light is on. The definition of the hatch exhaust assembly plug and its relationship with various components of the control circuit are as follows: 1) Pin “A” is the positive input for the hatch motor opening. When the component opening button ANI is pressed, the relay J1 is activated. The 28V operating power for hatch opening supplies power to pin “A” of the hatch exhaust component through the opening delay relay KT1. The hatch begins to execute the opening process. After the magnetic switch K3 (hatch opening position switch) is turned on, the opening delay relay KT1 is turned off or the opening delay relay KT1 is turned off after a 2-second delay. The equipment stops supplying power to the hatch opening “A”, and the hatch opening process stops. 2) Pin “B” is the positive terminal for the hatch motor closing: When the component closing button AN2 is pressed, the closing relay J2 is activated, and the 28V operating power supply for hatch closing is supplied to pin “B” of the hatch exhaust component through the closing delay relay KT2. The hatch begins to execute the closing process: According to the closing time set by the system (the hatch closing time is set to 2 seconds), the closing delay relay KT2 is disconnected after working for 2 seconds, the equipment stops supplying power to the hatch closing “B”, and the hatch closing process stops. 3) The “C” pin is the negative terminal of the hatch motor, used for negative line control of hatch opening and closing; 4) The “D” pin is the positive excitation terminal for the hatch being in position and open, and the “E” pin is the negative excitation terminal for the hatch being in position and open. “D” and “E” are used to power the magnetic switch K3. After the hatch is in position, the magnetic switch is turned on and outputs a negative control signal to “F”. 5) The “F” pin is the hatch opening position signal output, which is used to control the opening delay relay KT1 to work and disconnect the power supply to the hatch opening; 6) The “28V to 24V isolated power supply” and the “28V to 12V isolated power supply” supply power to the opening delay relay KT1 and the closing delay relay KT2, respectively.

[0020] like Figures 1-2 As shown, the specific usage steps are as follows: Step 1: Remove the maintenance cover from the aircraft that houses the door exhaust assembly. Place the maintenance cover on the cover bracket with the front side perpendicular to the ground, so that the door exhaust assembly is at the same angle as it is installed on the aircraft. Step 2: Use connecting cable 2 to connect the equipment socket and the hatch exhaust component socket. Specifically, the hatch exhaust component connection end 2-1 is plugged into the hatch exhaust component socket, and the detection equipment connection end 2-2 is plugged into the socket on the operation panel 1 to connect the equipment to a 220V power supply. Step 3: Connect the 220V power supply and observe the ammeter and voltmeter. If the voltage reading is normal, press the DC power switch. The indicator light on the DC power switch K2 will illuminate. Step 4: Press the hatch door switch to open the exhaust hatch door. Release the switch, and the hatch door should stop moving immediately. Continue pressing the switch for 2 seconds, and the hatch door should be fully open. The "fully open" indicator L1 should light up. If the switch is not released at this time, the 28V power supply will be automatically cut off after 2 seconds. Step 5: Press the hatch shut-off switch. The exhaust hatch should close, and the L2 work light should illuminate. Release the switch, and the hatch should immediately stop moving. After pressing the switch for 2 seconds, the hatch should close completely. If the switch is not released at this point, the 28V power supply will automatically cut off after 1.5 seconds, and the work light will turn off.

[0021] Following the above steps, the hatch can be stopped at any angle to facilitate adjustment of the step and clearance between the hatch and the maintenance access cover. Simultaneously, the time required for the hatch to open fully and the condition of the positioning signal, as well as the time required for it to close fully, can be checked. This delay control mimics the actual control logic of an aircraft, effectively protecting the safety of ground testing operations.

[0022] This invention can be used for pre-installation testing of exhaust assemblies and hatches, as well as for post-installation clearance performance adjustment. It can also be used for rapid replacement of new parts in the field, installation, commissioning, and troubleshooting. It can significantly improve the safety of testing and commissioning work, reduce the labor intensity of repeated disassembly and assembly, enhance the overall competitiveness of research projects, and has direct economic benefits.

Claims

1. A hatch exhaust assembly testing device, characterized in that: The detection equipment is integrated into the mounting box, which includes an operation panel and a control circuit. The operation panel is connected to the hatch exhaust assembly via a connecting cable and is equipped with several switches, sockets, and indicator lights. The control circuit includes an AC / DC converter, a relay, and a time-delay relay. The AC / DC converter converts the input 220V AC power into 28V DC power. When a switch is pressed, the relay operates, and the 28V DC power supplies power to the hatch exhaust assembly through the time-delay relay. The hatch then begins to execute the opening or closing process. When the hatch is fully opened or closed, the corresponding indicator light illuminates. The switch includes a device power switch, a DC power switch, a component open button, and a component close button; the device power switch is the main switch of the detection device, and the component open button and component close button are connected to the positive terminal of the AC / DC conversion power supply through the DC power switch, and the other end is connected to the door exhaust assembly through a relay and a time delay relay, respectively. The relays include an opening relay and a closing relay, and the time-delay relays include an opening time-delay relay and a closing time-delay relay. When the switch is pressed, the opening relay or the closing relay operates, and the 28V DC power supply is used to power the hatch exhaust assembly through the opening time-delay relay or the closing time-delay relay.

2. The hatch exhaust assembly testing equipment according to claim 1, characterized in that: Turn on the time delay relay to power it with an isolated power supply, which is a 28V to 24V isolated power supply.

3. The door exhaust assembly testing equipment according to claim 1, characterized in that: The time-delay relay is powered by an isolated power supply, which is a 28V to 12V isolated power supply.

4. The hatch exhaust assembly testing equipment according to claim 1, characterized in that: The indicator lights include an on-position light, an off-position light, and a working status indicator light; the on-position light is connected to the on-delay relay to display its working status; the off-position light is connected to the off-delay relay to display its working status; and the working status indicator light is connected to the AC / DC converter power supply to display its working status.

5. The hatch exhaust assembly testing equipment according to claim 1, characterized in that: A magnetic switch is installed between pins D and E of the hatch exhaust assembly. Pin D is the positive excitation terminal for the hatch being in position when it is fully open, and pin E is the negative excitation terminal for the hatch being in position when it is fully open. Pins D and E are used to supply power to the magnetic switch.

6. The hatch exhaust assembly testing equipment according to claim 1, characterized in that: The switch is a self-resetting switch.

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