Aircraft duct redundancy cleaning equipment and method

Abstract

The invention provides aircraft duct redundancy cleaning equipment and method, and belongs to the technical field of aircraft assembling.The aircraft duct redundancy cleaning equipment comprises a pneumatic part and a box body, the box body serves as a base body for bearing the pneumatic part, the pneumatic part internally comprises an air inlet, a filter, a stop valve, a pressure reducing valve, a foot valve and an air blowing opening which are connected through a pipeline, and the air inlet is connected with an air source; and the pneumatic part is finally connected with a conduit through a blowing port to realize conduit purging. Impurities, dust, redundant substances and the like in an inner cavity of the guide pipe can be removed through pneumatic purging, and it is guaranteed that the installed guide pipe is clean; the blowing pressure for flushing the catheter can be adjusted, and the purging pressure can be selected as required to complete purging of different catheters with different pressure values.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft assembly, and relates to equipment and method for cleaning excess matter from aircraft ducts, and specifically to equipment and method for using pneumatic force to blow away excess matter from the inner cavity of an aircraft duct before installation. Background Art

[0002] Aircraft ducting is a vital component of aircraft, encompassing systems like hydraulics, air conditioning, and fuel. These systems play a crucial role in aircraft mission execution and flight safety. In addition to ducting, these systems also contain precision finished products, which require high levels of cleanliness during operation. If impurities or debris block the flow path during operation, the finished product can cease functioning or even be damaged, impacting overall aircraft functionality and flight safety. Before being installed, aircraft ducting undergoes multiple stages, including production at the parts factory, storage in warehouses, transportation and delivery, and delivery to the assembly plant before reaching the installation site. During this process, the ducting is protected, but due to the lengthy and complex process, dust, impurities, and debris can enter the duct lumen, causing contamination. If these impurities are allowed to circulate within the system and settle on a finished product, they can cause it to cease functioning or even be damaged, impacting overall aircraft functionality and flight safety.

[0003] Therefore, it is necessary to design a process equipment that uses pneumatic force to blow out the inner cavity of the duct before the aircraft duct is installed, so as to blow away any excess matter that may exist in the duct and achieve the purpose of cleaning the duct. Summary of the Invention

[0004] The present invention provides an aircraft duct waste cleaning device and method, which performs a pneumatic purge on the aircraft duct before installation, and uses pneumatic force to clean impurities, dust and other waste in the duct lumen, thereby cleaning the duct lumen.

[0005] The technical solution adopted in the present invention is as follows:

[0006] An aircraft duct waste cleaning device includes a pneumatic component and a housing 1, which serves as a base for the pneumatic component. Specifically, the device comprises: the housing 1, a small air inlet 2, a large air inlet 3, a first foot valve 7-1, a second foot valve 7-2, an air inlet 9, a first pressure gauge 11-1, a second pressure gauge 11-2, a first stop valve 12-1, a second stop valve 12-2, a pressure reducing valve 13, a foot valve bracket 14, a first filter 17-1, a second filter 17-2, a metal duct 18, a three-way connector 19, a safety valve 20, and a flexible duct 21.

[0007] The small air inlet 2, the large air inlet 3, the two foot valves, the air inlet 9, the two pressure gauges, the two stop valves, the pressure reducing valve 13, the two filters, the metal conduit 18, the three-way joint 19, the safety valve 20, the metal conduit 18, and the soft conduit 21 are connected to form a pneumatic part; the air inlet 9, the first filter 17-1, the first stop valve 12-1, the pressure reducing valve 13, the second stop valve 12-2, and the second filter 17-2 are connected in sequence through metal conduits 18 of different shapes. A three-way joint 19 is provided on the pipeline between the first stop valve 12-1 and the pressure reducing valve 13, and the first pressure gauge 11- 1, two three-way connectors 19 are set on the pipeline between the pressure reducing valve 13 and the second stop valve 12-2, which are connected to the safety valve 20 and the second pressure gauge 11-2 in sequence along the air path direction. The second filter 17-2 is connected to the first foot valve 7-1 and the second foot valve 7-2 in parallel through the soft conduit 21. The first foot valve 7-1 and the second foot valve 7-2 are connected to the small blowing port 2 and the large blowing port 3 respectively; the ground air source blows air from the air inlet 9 into the pipeline of the pneumatic part, passes through the first filter 17-1 to filter the air to ensure that the incoming air is clean, and then controls the air source connection through the first stop valve 12-1. The first pressure gauge 11-1 is connected through a three-way pipe joint 19 to measure the pipeline air pressure; the pipeline air pressure is manually adjusted to the required value for flushing the pipe through the pressure reducing valve 13, and then the safety valve 20 is connected through a three-way pipe joint 19. The safety valve 20 sets a safety pressure value. When the pipeline pressure value exceeds the safety pressure value, the safety valve 20 opens to release the pressure inside the pipeline and protect the process equipment components; then the second pressure gauge 11-2 is connected through a three-way pipe joint 19 to observe the air pressure after being adjusted by the pressure reducing valve 13; then the second stop valve 1 is connected through the second stop valve 1 2-2 controls the airflow in the pipeline to be turned on and off to determine whether the purge work can be carried out; the blown air is then filtered again through the second filter 17-2; and then it is divided into two paths through the soft tube 21, which are respectively connected to the first foot valve 7-1 and the second foot valve 7-2. The soft tube 21 plays a certain buffering role to avoid damage to the process equipment pipeline caused by repeated footsteps. The foot valve 7-1 and the foot valve 7-2 respectively control the airflow to be blown out from the small blowing port 2 or the large blowing port 3 by stepping on the foot, and are respectively used to connect with the small diameter tube and the large diameter tube orifice to purge the inner cavity of the small diameter tube and the large diameter tube.

[0008] The pneumatic part is installed on the box body 1, and a first pressure gauge 11-1 and a second pressure gauge 11-2 are installed in the upper observation area of ​​the box body 1, which are used to observe the pressure value of the gas introduced into the process equipment pipeline during the cleaning process and the pressure value after adjustment, so as to judge the ventilation pressure effect; a first stop valve 12-1, a second stop valve 12-2 and a pressure reducing valve 13 are installed in the upper operation area of ​​the box body 1, which are respectively used to control the connection and disconnection of the airflow of the process equipment during the catheter cleaning process, and to adjust the operating pressure of the airflow when the process equipment is working; an air inlet 9 is provided on one side of the box body 1 for connecting to the ground air source; a small air blowing port 2 and a large air blowing port 3 are installed in the middle of the front side of the box body 1, which are used for blowing and cleaning small-diameter catheters and large-diameter catheters respectively; a foot valve bracket 14 is installed at the lower front side of the box body 1, and a first foot valve 7-1 and a second foot valve 7-2 are installed on the foot valve bracket 14, which are used to control the connection and disconnection of the airflow connected to the two air blowing ports respectively.

[0009] Furthermore, two universal wheels 6 and two fixed wheels 8 are installed on the bottom for moving the process equipment to a designated working position.

[0010] Furthermore, handles 10 are installed on both sides of the box body 1 for grasping and applying force when moving the process equipment.

[0011] Furthermore, the box body 1 is provided with two front maintenance doors 4 at the front, and an upper rear maintenance door 15 and a lower rear maintenance door 16 at the back for maintenance of the interior of the box body 1. A door lock 5 is installed on each of the front maintenance door 4, the upper rear maintenance door 15, and the lower rear maintenance door 16.

[0012] A method for cleaning excess debris from an aircraft duct is implemented based on the above-mentioned aircraft duct excess debris cleaning device, comprising the following steps:

[0013] Step 1: Connect the air source of the process equipment:

[0014] Before use, ensure that the first stop valve 12-1, the second stop valve 12-2, and the pressure reducing valve 13 are in the closed state; and connect the air inlet 9 to the ground air source.

[0015] Step 2: Adjust the air pressure:

[0016] First open the first stop valve 12-1 to fill the pneumatic part of the pipeline with air, observe the first pressure gauge 11-1, and when the pressure value displayed is higher than the pressure requirement for catheter flushing, open the pressure reducing valve 13, and observe the second pressure gauge 11-2 at the same time, and manually adjust the pressure reducing valve 13 so that the value of the second pressure gauge 11-2 meets the pressure requirement for catheter flushing.

[0017] Step 3: Flushing the catheter:

[0018] 1) Flushing small-diameter catheters:

[0019] Open the second stop valve 12-2, align the small-diameter catheter to be cleaned with the small air outlet 2 and fix it, step on the first foot valve 7-1 to blow air into the small-diameter catheter, and blow according to the prescribed blowing time. After the blowing is completed, release the first foot valve 7-1, stop blowing, and remove the catheter.

[0020] 2) Flushing large-diameter pipes

[0021] Open the second stop valve 12-2, align the large-diameter catheter to be cleaned with the large air outlet 3 and fix it, step on the second foot valve 7-2 to blow air into the large-diameter catheter, and blow according to the prescribed blowing time. After the blowing is completed, release the second foot valve 7-2, stop blowing, and remove the catheter.

[0022] Step 4: Turn off the process equipment blowing:

[0023] After closing the second stop valve 12 - 2 , the pressure reducing valve 13 , and the first stop valve 12 - 1 in sequence, the air inlet 9 is disconnected.

[0024] The beneficial effects of the present invention are:

[0025] The present invention can remove impurities, dust, excess materials, etc. in the inner cavity of the catheter through pneumatic blowing, so as to ensure the cleanliness of the installed catheter; the blowing pressure of the flushing catheter can be adjusted, and the blowing pressure can be selected as needed to complete the blowing of catheters with different pressure values; the present invention installs a safety valve in the pneumatic passage to protect the pneumatic pipeline of the process equipment and avoid damage to the process equipment components due to excessive pressure; the present invention designs two caliber air outlets, which are controlled by different passages, and can blow and purge large-diameter and small-diameter catheters respectively; the present invention uses a foot-operated method to control the blowing of the catheter, and it is more convenient to use the foot-operated method when holding the catheter during blowing and purge; the present invention is installed with universal casters and fixed casters, which is easy to move and can be conveniently pushed to switch work sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Cleaning equipment shaft side for excess material in aircraft ducts Figure 1 .

[0027] Figure 2 Cleaning equipment shaft side for excess material in aircraft ducts Figure 2 .

[0028] Figure 3 Pneumatic schematic diagram of equipment for cleaning excess material from aircraft ducts.

[0029] In the figure: 1 box body; 2 small air blowing port; 3 large air blowing port; 4 front maintenance door; 5 door lock; 6 universal wheel; 7-1 first foot valve; 7-2 second foot valve; 8 fixed wheel; 9 air inlet; 10 handle; 11-1 first pressure gauge; 11-2 second pressure gauge; 12-1 first stop valve; 12-2 second stop valve; 13 pressure reducing valve; 14 foot valve bracket; 15 upper rear maintenance door; 16 lower rear maintenance door; 17-1 first filter; 17-2 second filter; 18 metal conduit; 19 three-way connector; 20 safety valve; 21 soft conduit. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention in detail, but the present invention is not limited to these embodiments.

[0031] An aircraft duct waste cleaning device, such as Figure 1 and Figure 2 As shown, it includes: a box body 1, a small air blowing port 2, a large air blowing port 3, a front maintenance door 4, a door lock 5, a universal wheel 6, a first foot valve 7-1, a second foot valve 7-2, a fixed wheel 8, an air inlet 9, a handle 10, a first pressure gauge 11-1, a second pressure gauge 11-2, a first stop valve 12-1, a second stop valve 12-2, a pressure reducing valve 13, a foot valve bracket 14, a rear upper maintenance door 15, a rear lower maintenance door 16, a first filter 17-1, a second filter 17-2, a metal conduit 18, a three-way connector 19, a safety valve 20, and a soft conduit 21.

[0032] The box body 1 serves as the base of the process equipment, and other structures are integrated and fixed on the box body 1. Two universal wheels 6 and two fixed wheels 8 are installed at the bottom thereof for moving the process equipment to the designated working position. The function of the universal wheels 6 is to facilitate the adjustment of the direction during the movement, and the function of the fixed wheels 8 is to lock the process equipment in the designated working area; a first pressure gauge 11-1 and a second pressure gauge 11-2 are installed in the upper observation area of ​​the box body 1 for observing the pressure value of the gas introduced into the process equipment pipeline during the cleaning process and the pressure value after adjustment, so as to judge the ventilation pressure effect; a first stop valve 12-1, a second stop valve 12-2 and a pressure reducing valve 13 are installed in the upper operating area of ​​the box body 1, which are respectively used to control the connection and closing of the airflow of the process equipment during the catheter cleaning process, and to adjust the use pressure of the airflow when the process equipment is working.

[0033] Two front maintenance doors 4 are provided at the front of the housing 1, and one upper rear maintenance door 15 and one lower rear maintenance door 16 are provided at the back of the housing 1. When opened, these doors are used to perform maintenance and upkeep on the process equipment components within the housing 1. Each of the front, upper rear, and lower rear maintenance doors 4, 15, and 16 is fitted with a door lock 5, which locks the doors when closed and acts as a handle for manually opening the doors when opened. An air inlet 9 is provided on one side of the housing 1 for connecting to a ground air source to provide a pneumatic source for the process equipment. A small air inlet 2 and a large air inlet 3 are provided in the middle of the front of the housing 1, for purging small and large diameter ducts, respectively. A foot valve bracket 14 is provided at the lower front of the housing 1, on which a first foot valve 7-1 and a second foot valve 7-2 are mounted, respectively, for controlling the flow of air to and from the two air inlets.

[0034] Handles 10 are installed on both sides of the box body 1 for grasping and applying force when moving the process equipment.

[0035] The small air inlet 2, the large air inlet 3, two foot valves, the air inlet 9, two pressure gauges, two stop valves, the pressure reducing valve 13, two filters, the metal conduit 18, the three-way connector 19, the safety valve 20, the metal conduit 18, and the soft conduit 21 are connected to form the pneumatic part. Figure 3The air inlet 9, the first filter 17-1, the first stop valve 12-1, the pressure reducing valve 13, the second stop valve 12-2 and the second filter 17-2 are connected in sequence through metal conduits 18 of different shapes. A three-way joint 19 is provided on the pipeline between the first stop valve 12-1 and the pressure reducing valve 13, and the first pressure gauge 11-1 is connected. Two three-way joints 19 are provided on the pipeline between the pressure reducing valve 13 and the second stop valve 12-2, and the safety valve 20 and the second pressure gauge 11-2 are connected in sequence along the air path direction. The second filter 17-2 is connected to the first stop valve 12-1 and the pressure reducing valve 13. The first foot valve 7-1 and the second foot valve 7-2 are connected in parallel through the soft conduit 21, and the first foot valve 7-1 and the second foot valve 7-2 are connected to the small blowing port 2 and the large blowing port 3 respectively; the ground air source blows air from the air inlet 9 into the pipeline of the pneumatic part, and is filtered by the first filter 17-1 to ensure that the incoming air is clean, and then the air source is controlled to be connected or disconnected through the first stop valve 12-1, and then the first pressure gauge 11-1 is connected through a three-way pipe joint 19 to measure the pipeline air pressure; then the pressure reducing valve is used to control the air flow. 13 manually adjusts the pipeline air pressure to the value required for flushing the catheter, and then connects the safety valve 20 through a three-way pipe joint 19. The safety valve 20 is set to a safety pressure value. When the flushing pipeline pressure value exceeds the safety pressure value, the safety valve 20 opens to release the pressure inside the pipeline and protect the process equipment components; then connect the second pressure gauge 11-2 through a three-way pipe joint 19 to observe the air pressure after the pressure reducing valve 13 is adjusted; then control the air flow in the pipeline to be turned on and off through the second stop valve 12-2 to determine whether it is possible Perform the purge operation; then the blown air is filtered again through the second filter 17-2; then it is divided into two paths through the soft conduit 21, and respectively leads to the first foot valve 7-1 and the second foot valve 7-2. The soft conduit 21 plays a certain buffering role to avoid damage to the process equipment pipeline caused by repeated footsteps. The foot valve 7-1 and the foot valve 7-2 respectively control the air flow to be blown out from the small blowing port 2 or the large blowing port 3 by stepping on the foot, and are respectively used to connect with the small diameter conduit and the large diameter conduit to purge the inner cavity of the small diameter conduit and the large diameter conduit.

[0036] A method for cleaning excess debris from an aircraft duct is implemented based on the above-mentioned aircraft duct excess debris cleaning device, comprising the following steps:

[0037] Step 1: Connect the air source of the process equipment:

[0038] Before use, ensure that the first stop valve 12-1, the second stop valve 12-2, and the pressure reducing valve 13 are in the closed state; and connect the air inlet 9 to the ground air source.

[0039] Step 2: Adjust the air pressure:

[0040] First open the first stop valve 12-1 to fill the pneumatic part of the pipeline with air, observe the first pressure gauge 11-1, and when the pressure value displayed is higher than the pressure requirement for catheter flushing, open the pressure reducing valve 13, and observe the second pressure gauge 11-2 at the same time, and manually adjust the pressure reducing valve 13 so that the value of the second pressure gauge 11-2 meets the pressure requirement for catheter flushing.

[0041] Step 3: Flushing the catheter:

[0042] 1) Flushing small-diameter catheters:

[0043] Open the second stop valve 12-2, align the small-diameter catheter to be cleaned with the small air outlet 2 and fix it, step on the first foot valve 7-1 to blow air into the small-diameter catheter, and blow according to the prescribed blowing time. After the blowing is completed, release the first foot valve 7-1, stop blowing, and remove the catheter.

[0044] 2) Flushing large-diameter pipes

[0045] Open the second stop valve 12-2, align the large-diameter catheter to be cleaned with the large air outlet 3 and fix it, step on the second foot valve 7-2 to blow air into the large-diameter catheter, and blow according to the prescribed blowing time. After the blowing is completed, release the second foot valve 7-2, stop blowing, and remove the catheter.

[0046] Step 4: Turn off the process equipment blowing:

[0047] After closing the second stop valve 12 - 2 , the pressure reducing valve 13 , and the first stop valve 12 - 1 in sequence, the air inlet 9 is disconnected.

[0048] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the invention are indicated by the claims of this application.

Claims

1. An aircraft duct waste cleaning device, characterized in that: The invention comprises a pneumatic part and a box (1), wherein the box (1) serves as a base body for carrying the pneumatic part, and the pneumatic part is sequentially connected to an air inlet (9), a first filter (17-1), a first stop valve (12-1), a pressure reducing valve (13), a second stop valve (12-2), a second filter (17-2), a foot valve and an air outlet through pipelines. The air inlet (9) is connected to an external air source, and the air is filtered and regulated by the pneumatic part and then blown out from the air outlet, thereby achieving catheter flushing.

2. The aircraft duct waste cleaning device according to claim 1, characterized in that: Specifically: The pneumatic part is connected in sequence to the air inlet (9), the first filter (17-1), the first stop valve (12-1), the pressure reducing valve (13), the second stop valve (12-2), the second filter (17-2), the foot valve and the air outlet through a pipeline; a first pressure gauge (11-1) is provided on the pipeline between the first stop valve (12-1) and the pressure reducing valve (13), and a second pressure gauge (11-2) is provided on the pipeline between the pressure reducing valve (13) and the second stop valve (12-2); the air source enters the pipeline from the air inlet (9), passes through the first filter ( 17-1), then the air source is controlled to be connected or disconnected through the first stop valve (12-1), then the pipeline air pressure is measured through the first pressure gauge (11-1), then the pipeline air pressure is adjusted to the required use value through the pressure reducing valve (13), and then the air pressure adjusted by the pressure reducing valve (13) is observed through the second pressure gauge (11-2); then the air flow in the pipeline is controlled to be connected or closed through the second stop valve (12-2); then the air is filtered again through the second filter (17-2); and then the air flow is controlled to be blown out from the blowing port through the foot valve to purge the inner cavity of the catheter; The first pressure gauge (11-1) and the second pressure gauge (11-2) are installed in the upper observation area of ​​the box (1); the first stop valve (12-1), the second stop valve (12-2) and the pressure reducing valve (13) are installed in the upper operation area of ​​the box (1); the air inlet (9) and the air outlet are installed on the side wall of the box (1); and the foot valve is installed in the lower part of the box (1).

3. The aircraft duct waste cleaning device according to claim 2, characterized in that: The air inlet (9), the first filter (17-1), the first stop valve (12-1), the pressure reducing valve (13), the second stop valve (12-2), and the second filter (17-2) are connected via metal conduits (18) of different sizes; the first pressure gauge (11-1) and the second pressure gauge (11-2) are connected to the pipeline via the metal conduit (18) and the three-way joint (19); and the second filter (17-2), the foot valve, and the air outlet are connected via a soft conduit (21).

4. The aircraft duct waste cleaning device according to claim 2 or 3, characterized in that: The air outlet comprises a small air outlet (2) and a large air outlet (3) for connecting to conduits of different sizes; the foot valve comprises a first foot valve (7-1) and a second foot valve (7-2), which are respectively connected to the small air outlet (2) and the large air outlet (3) to respectively control the opening and closing of the corresponding air outlets; the pipeline after the second filter (17-2) is divided into two paths, respectively connecting the first foot valve (7-1) and the small air outlet (2) and the second foot valve (7-2) and the large air outlet (3).

5. The aircraft duct waste cleaning device according to claim 2, characterized in that: A safety valve (20) is also provided on the pipeline between the pressure reducing valve (13) and the second stop valve (12-2) for setting a safety pressure value. When the pipeline pressure value exceeds the safety pressure value, the safety valve (20) opens to release the pressure inside the pipeline.

6. The aircraft duct waste cleaning device according to claim 2, characterized in that: A foot valve bracket (14) is installed at the bottom of the box body (1), and the foot valve is fixed on the foot valve bracket (14).

7. The aircraft duct waste cleaning device according to claim 1, characterized in that: The bottom is equipped with universal wheels (6) and fixed wheels (8) for moving the equipment.

8. The aircraft duct waste cleaning device according to claim 1, characterized in that: Handles (10) are installed on both sides of the box body (1) to facilitate movement.

9. The aircraft duct waste cleaning device according to claim 1, characterized in that: The front of the box body (1) is provided with a front maintenance door (4), the back is provided with a rear upper maintenance door (15) and a rear lower maintenance door (16), and each door is equipped with a door lock (5).

10. A method for cleaning excess debris from an aircraft duct, implemented based on the aircraft duct excess debris cleaning device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Connect the air source of the process equipment: Before use, ensure that the first stop valve (12-1), the second stop valve (12-2), and the pressure reducing valve (13) are in a closed state; connect the air inlet (9) to the ground air source; Step 2: Adjust the air pressure: First, open the first stop valve (12-1) to fill the pneumatic part of the pipeline with air, observe the first pressure gauge (11-1), and when the pressure value displayed is higher than the pressure requirement for pipe flushing, open the pressure reducing valve (13), and at the same time observe the second pressure gauge (11-2), and adjust the pressure reducing valve (13) so that the value of the second pressure gauge (11-2) meets the pressure requirement for pipe flushing; Step 3: Flushing the catheter: Open the second stop valve (12-2), align the tube mouth of the catheter to be cleaned with the blowing port and fix it, step on the foot valve to blow air into the catheter, and blow according to the specified blowing time. After the blowing is completed, release the foot valve to stop blowing and remove the catheter; Step 4: Turn off the process equipment blowing: After the second stop valve (12-2), the pressure reducing valve (13), and the first stop valve (12-1) are closed in sequence, the air inlet (9) is disconnected.

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