A civil aircraft engine on-wing washing wastewater collection device

Abstract

The present invention discloses a device for collecting wastewater from wing washing of civil aircraft engines, comprising: a transport frame, a wastewater collection trolley, a wastewater purification and discharge device, and a hydraulic lifting platform. The wastewater collection trolley is equipped with a water vapor ram cyclone, which comprises a ram swirl baffle and a center cone; the center cone is fixed at the center position of the bottom of the water vapor ram cyclone and is conical; the ram swirl baffle has a spiral cross-section and is distributed in the water vapor ram swirl, and the ram swirl baffle is welded to the center cone; due to the spiral ram swirl baffle design, the water and gas mixture forms a high-speed rotating airflow in the water vapor ram swirl, generating centrifugal force, and the entire water vapor ram swirl is under negative pressure. Due to the different weights of water and gas, wastewater flows into the sewage tank; gas is discharged from the exhaust port. The present invention utilizes the kinetic energy of the engine tail jet exhaust gas and the ram swirl baffle design to enable the water and gas mixture to form a high-speed rotating airflow in the water-gas ram swirl separator without the need for energy supply; it has the characteristics of environmental protection and energy saving; and because the swirl separator has a simple structure, has a high water vapor separation effect and a low air path blocking effect, no additional maintenance costs are required in the later stage.

Description

Technical Field

[0001] The present invention belongs to the field of water washing equipment for civil aircraft engines, and in particular relates to a wastewater collection device for on-wing water washing of civil aircraft engines. Background Art

[0002] Aircraft engine air path cleaning improves compressor efficiency and increases the engine exhaust temperature margin (EGTM), thereby saving fuel and extending the life of hot engine components. Within certain limits, it can maintain engine performance, extend engine on-wing life, and reduce engine maintenance costs. Furthermore, due to its simplicity and minimal tooling requirements, engine water washing has become a preferred and effective line maintenance measure for airlines. However, with the continued growth of civil aviation fleets and the increase in engine service life, the frequency of engine water washing is rapidly increasing. However, during the water washing process, dust from internal components, jet fuel coke particles, and other heavy metal contaminants are introduced into the water wash wastewater, which is discharged through the engine exhaust and bottom drain holes. This wastewater contains large amounts of pollutants such as ammonia nitrogen, total nitrogen, hexavalent chromium, and petroleum. Direct discharge of this wastewater onto the apron can cause serious damage to the airport ecosystem and apron personnel. Furthermore, the wastewater discharged from the engine exhaust is a water-air mixture compressed by the engine and ejected outward at a constant velocity. Without a collection device, this wastewater can be discharged directly into a relatively large area, causing pollution.

[0003] The original cleaning operation is to use a set of wastewater collection equipment to clean one side, and then clean the other side after completion. With the in-depth research and practice of engine water washing theory, a more efficient, scientific, and energy-saving alternating water washing method has emerged in the civil aviation field. This method can clean the engines on both sides of the aircraft at the same time. Each engine on each side must be cleaned 3 times each time. After each cleaning, it is necessary to wait for 5 minutes before continuing to clean. Therefore, using the waiting time of the engine soaking operation to wash the engine on the other side can greatly reduce the engine water washing working time. If combined with the alternating water washing method, two sets of wastewater collection equipment need to be deployed at the same time, which will increase costs. Therefore, at this stage, there is an urgent need for a one-to-two engine wastewater collection device with low energy consumption and at the same time meeting the alternating water washing method, so that one set of equipment can collect wastewater discharged from two engine water washings at the same time. Summary of the Invention

[0004] The purpose of the present invention is to provide a civil aircraft engine on-wing water washing wastewater collection device, which can simultaneously complete wastewater collection and purification work.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a civil aircraft engine on-wing water washing wastewater collection device, used for collecting and purifying wastewater discharged from civil aviation engine water washing work, the civil aircraft refers to a civil aviation narrow-body passenger aircraft.

[0006] The present invention comprises:

[0007] Transport frame 1, wastewater collection trolley 2, wastewater purification and discharge device 3, hydraulic lifting platform 4; wastewater purification and discharge device 3 is fixed on the transport frame 1, and the transport frame 1 is fixed on the hydraulic lifting platform 4;

[0008] There are two wastewater collection carts 2, which are used to collect wastewater discharged during water washing of engines a on both sides of civil aircraft. After collecting the washing wastewater, the two wastewater collection carts 2 filled with wastewater are pushed onto the transport frame 1 to complete the connection between the wastewater collection cart 2 and the wastewater purification and discharge device 3, and the wastewater is discharged after purification.

[0009] The wastewater collection trolley 2 includes: a water vapor ramming cyclone 2-1, a sewage tank 2-2, a water receiving plate 2-3, a sewage pipe 2-4, a bracket 2-5, a conical connecting cloth cover 2-6, wheels 2-7, and a steering wheel 2-8. One end of the conical connecting cloth cover 2-6 is connected to the engine exhaust port a-1 and is fixed in the engine flange mounting hole by a rope, and the other end is fixed to the air inlet end face flange 2-1-7 of the water vapor ramming cyclone 2-1 by bolts;

[0010] The water vapor ram cyclone separator 2-1 includes: a shell 2-1-1, a water leakage plate 2-1-2, a ram cyclone baffle 2-1-3, a water pipe 2-1-4, a foreign body prevention net 2-1-5, a center cone 2-1-6, an end face flange 2-1-7, and an exhaust port 2-1-8;

[0011] The central cone 2-1-6 is fixed at the center of the bottom of the water vapor ram cyclone 2-1 and is conical in shape; the ram cyclone baffle 2-1-3 is spirally distributed in the water vapor ram cyclone 2-1 in cross section, and the ram cyclone baffle 2-1-3 is welded to the central cone 2-1-6;

[0012] Specifically, the blade sides of the ram swirl baffle 2-1-3 are welded to the central cone 2-1-6;

[0013] The water leakage plate 2-1-2 is evenly laid on the inner wall of the shell 2-1-1 and is connected to the shell 2-1-1 by bolts of the end face flange 2-1-7; the foreign body prevention net 2-1-5 is fixed to the surface of the end face flange 2-1-7 by bolts;

[0014] The shell 2-1-1 is fixed to the bracket 2-5 by bolts or welding, and the water pipe 2-1-4 is inserted obliquely into the sewage tank 2-2 of the wastewater collection vehicle. The periphery of the water pipe 2-1-4 is sealed with sealant.

[0015] The water receiving plate 2-3 is retractable; the water receiving plate 2-3 is composed of multiple retractable plates 2-3-1, each retractable plate 2-3-1 is a wide trough structure, and the sizes of the multiple retractable plates 2-3-1 increase from the inside to the outside, so they can be stacked; multiple plates are connected by slide rails 2-3-2 and set with stop positions. The front retractable plate 2-3-1 is installed with a retractable plate support rod 2-3-4 for adjusting the inclination angle of the retractable plate 2-3-1, and the last retractable plate 2-3-1 is connected to the sewage tank 2-2 through the leakage hole 2-2-5. After the water receiving plate 2-3 is unfolded, it is placed under the engine. Its function is that when performing water washing work, the engine fan frame falls and the wastewater discharged from the aircraft's own drainage hole will drip into the retractable plate 2-3-1, and the sewage flows into the sewage tank 2-2 along the retractable plate, wherein the retractable plate support rod 2-3-4 can adjust the inclination angle to ensure that all the sewage enters the sewage tank 2-2.

[0016] The sewage tank 2-2 includes: a leak hole 2-2-5 connected to the last plate, an anti-swimming plate 2-2-1, a sewage tank cover plate 2-2-4, and a sewage pipe 2-4; the anti-swimming plates 2-2-1 are three in number; they are fixed in the sewage tank 2-2, and each anti-swimming plate 2-2-1 is provided with a hole to ensure that sewage can flow in the sewage tank 2-2 and prevent wastewater from swimming and overflowing during transportation;

[0017] Furthermore, the transport frame 1 includes a frame tailgate 1-1 that can be opened and closed;

[0018] Furthermore, the wastewater purification and discharge device 3 includes a water pump 3-1, a water purifier 3-2, a water inlet pipe 3-3, and a drain pipe 3-4;

[0019] Furthermore, the hydraulic lifting platform 4 includes: a pressure rod 4-1, a hydraulic pump 4-2, a connecting rod assembly 4-3, a rear wheel height adjustment connecting rod assembly 4-4 and a rear wheel 4-5, and a steering wheel 4-6; the entire hydraulic lifting platform 4 functions like a manual hydraulic forklift.

[0020] The hydraulic lifting platform 4 and the wastewater purification and discharge device 3 are mechanically connected to the transport frame 1 through bolts.

[0021] When the wastewater collection trolley 2 is pushed to the vicinity of the transport frame 1, the hydraulic pump 4-2 is released to place the transport frame 1 in the lowest position, close to the ground, and the tailgate 1-1 is connected to the rear of the transport frame 1 with a hinge; the tailgate 1-1 is opened to form a small slope, and the two wastewater collection trolleys 2 are pushed onto the transport frame 1, and the hydraulic pump 4-2 is pressed by the pressure rod 4-1 to lift the transport frame 1 to the transport position, so that the two wastewater collection trolleys 2 are towed away from the apron in the manner of a large vehicle towing a small vehicle.

[0022] Furthermore, the water inlet pipe 3-3 of the wastewater purification and discharge device 3 is connected to the sewage pipe 2-4 on the wastewater collection cart 2, and the water pump 3-1 pumps the wastewater in the wastewater collection cart 2 to the wastewater purifier 3-2. The water after passing through the purifier is discharged to the outside, avoiding direct pollution of the apron by the wastewater.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] After the water and gas mixture discharged from the tail jet of the aircraft engine enters the water-gas ram cyclone, the spiral ram cyclone baffle design causes the water and gas mixture to form a high-speed rotating airflow in the water-gas ram cyclone, generating centrifugal force, and the entire water-gas ram cyclone is under negative pressure. Due to the different weights of water and gas, wastewater enters the cavity between the leaking plate and the outer shell, and flows into the sewage tank through the water pipe; the gas is discharged from the exhaust port of the water-gas ram cyclone. The present invention utilizes the kinetic energy of the exhaust gas from the engine tail jet and the ram cyclone baffle design to form a high-speed rotating airflow in the water-gas ram cyclone without the need for energy supply; it has the characteristics of environmental protection and energy saving; and because the cyclone has a simple structure, a high water vapor separation effect and a low air path blocking effect, no more maintenance costs need to be invested in the later stage.

[0025] The overall design of this invention involves using a single transport vehicle to transport two wastewater collection carts. This eliminates the need for two separate wastewater collection devices when alternating engine washing is required. Alternating engine washing is becoming a trend in the civil aviation industry, but the market lacks wastewater collection devices for this purpose, making this invention more competitive.

[0026] The two wastewater collection carts collect the wastewater discharged from the engine water washing into the water tank of the wastewater collection cart through the water-gas ramming cyclone and the bottom water receiving plate respectively, and then push the wastewater collection cart to the transport vehicle. Since the airport apron is a smooth cement floor, the wastewater collection cart of the present invention adopts a low-chassis small wheel design, so that the operator will be more labor-saving and flexible when using the wastewater collection cart. The wastewater collection cart filled with wastewater is transported to the transport vehicle using a manually operated hydraulic lifting platform, which makes it flexible and convenient to push the wastewater collection cart to the transport vehicle. After being pushed onto the transport vehicle, the drainage pipe of the cart and the purification device on the transport vehicle are connected with a hose, and then the wastewater is pumped to the wastewater purifier by a water pump for purification and discharge, avoiding the pollution of the airport environment caused by the direct discharge of water washing wastewater into the apron.

[0027] Compared with traditional wastewater collection devices, the design of a large truck towing a small cart adopted by the present invention not only reduces manufacturing costs at the source, but also saves costs for airlines to purchase wastewater collection equipment. In the face of the high-efficiency alternating water washing method that will inevitably be adopted by civil aviation in the future, the present invention has obvious cost advantages and ease of use. In addition, the water-gas ram cyclone used in the present invention is based on the actual situation of civil aviation engine water washing. It adopts the principle of centrifugal separation and is designed specifically for collecting wastewater discharged from engine tail spray. It has better water-gas separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Structural schematic diagram of the present invention

[0029] Figure 2 Schematic diagram of the connection between the wastewater collection cart and the aircraft engine

[0030] Figure 3 Structural diagram of the sewage tank of the wastewater collection vehicle

[0031] Figure 4 Schematic diagram of the water-gas ram cyclone

[0032] Figure 5 Schematic diagram of the wastewater purification and discharge device structure

[0033] Figure 6 Schematic diagram of hydraulic lifting platform structure

[0034] Figure 7 Schematic diagram of the wastewater collection cart being pushed onto the transport vehicle

[0035] Reference numerals:

[0036] Transport frame 1, wastewater collection trolley 2, wastewater purification and discharge device 3, hydraulic lifting platform 4;

[0037] Frame tailgate 1-1;

[0038] Water-gas ramming cyclone 2-1, sewage tank 2-2, water receiving plate 2-3, sewage pipe 2-4, bracket 2-5, conical connecting cloth cover 2-6, wheel 2-7, guide wheel 2-8;

[0039] Shell 2-1-1, water leakage plate 2-1-2, ram swirl baffle 2-1-3, water pipe 2-1-4, foreign body protection net 2-1-5, center cone 2-1-6, end flange 2-1-7, exhaust port 2-1-8;

[0040] Anti-swimming plate 2-2-1, sewage tank cover 2-2-4, leakage hole 2-2-5;

[0041] Telescopic plate 2-3-1, slide rail 2-3-2, telescopic plate support rod 2-3-4;

[0042] Water pump 3-1, water purifier 3-2, water inlet pipe 3-3, drain pipe 3-4;

[0043] Beating rod 4-1, hydraulic pump 4-2, connecting rod assembly 4-3, rear wheel height adjustment connecting rod assembly 4-4, rear wheel 4-5, steering wheel 4-6;

[0044] Engine a, engine exhaust port a-1. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0046] See also Figure 1-7 , a civil aircraft engine on-wing washing wastewater collection device, comprising:

[0047] A transport frame, two wastewater collection carts, a wastewater purification and discharge device, and a hydraulic lifting platform. The wastewater collection carts are used to collect wastewater discharged during the water washing of engines A on both sides of civil aircraft. After collecting the washing wastewater, the two wastewater collection carts filled with wastewater are pushed onto the transport frame, completing the connection between the wastewater collection carts and the wastewater purification and discharge device, and the wastewater is discharged after purification.

[0048] The wastewater collection vehicle includes a water vapor ram cyclone, a sewage tank, a water receiving plate, a sewage pipe, a bracket, and a conical connecting cloth cover. The front end of the conical connecting cloth cover can be connected to the tail nozzle of engine A via a rope, and the rear end is fixed to the air inlet of the water vapor ram cyclone by bolts. The water vapor ram cyclone includes an outer shell, a water leakage plate, a ram swirl baffle, a water pipe, and a foreign body prevention net. The mixture of wastewater and gas at a certain speed discharged from the tail nozzle of engine A enters the inlet of the water vapor ram cyclone, and is guided by the ram swirl baffle to form a high-speed rotating airflow in the water vapor ram cyclone. Due to the different weights of water and gas, the wastewater enters the cavity between the water leakage plate and the outer shell, flows into the sewage tank through the water pipe, and the gas discharged by engine A is discharged from the exhaust port of the water vapor ram cyclone. The water receiving plate includes three-stage retractable plates, which are connected by rails. To collect wastewater discharged from the bottom of Engine A, the telescopic plate is extended step by step along the track. The support rod adjusts the plate's tilt angle to ensure that the wastewater discharged from the bottom of Engine A flows along the plate and into the sewage tank. After collection, the water collection plate is gradually retracted to the retracted and locked position. The sewage tank includes three anti-swimming plates to prevent wastewater from swishing and overflowing during transportation, and a sewage tank cover for regular inspection and cleaning. A bracket is used to secure the water-gas separator. A sewage pipe connects wastewater from the wastewater collection cart to the inlet pipe of the wastewater purification and discharge device.

[0049] The hydraulic lift platform consists of a pressure rod, a hydraulic pump, a connecting rod assembly, and a rear wheel height adjustment connecting rod assembly. The wastewater collection cart, once collected, is pushed to the transport frame. By releasing pressure from the hydraulic pump, the connecting rod assembly's wastewater collection cart loading platform is lowered to its lowest position. The two wastewater collection carts are then pushed onto the connecting rod assembly's loading platform. The pressure rod is then applied to the hydraulic pump, and the connecting rod assembly is raised to the transport position using hydraulic power. The wastewater collection cart is then connected to the wastewater purification and discharge equipment using hoses.

[0050] The wastewater purification and discharge device comprises a water pump with a power storage function, a water purifier, a water inlet pipe, and a drain pipe. The water inlet pipe is connected to the drainage pipe of the wastewater collection vehicle via a hose. When the water pump is activated, it pumps wastewater from the wastewater collection vehicle into the water purifier. After purification, the wastewater is discharged to the outside through the drain pipe.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and description of the present invention.

Claims

1. A civil aircraft engine on-wing washing wastewater collection device, characterized in that: include: A transport frame (1), a wastewater collection trolley (2), a wastewater purification and discharge device (3), and a hydraulic lifting platform (4); the wastewater purification and discharge device (3) is fixed on the transport frame (1), and the transport frame (1) is fixed on the hydraulic lifting platform (4); The wastewater collection trolley (2) comprises: a water-gas ramming cyclone (2-1), a sewage tank (2-2), a water receiving plate (2-3), a sewage pipe (2-4), a bracket (2-5), a conical connecting cloth cover (2-6), wheels (2-7), and a steering wheel (2-8); One end of the conical connecting cloth cover (2-6) is connected to the engine exhaust port (a-1) of the engine (a) and is fixed in the engine flange mounting hole by winding a rope, and the other end is fixed to the air inlet end face flange (2-1-7) of the water vapor ramming spinner (2-1) by bolts; The water-gas ramming cyclone separator (2-1) comprises: a housing (2-1-1), a water leakage plate (2-1-2), a ramming cyclone baffle (2-1-3), a water pipe (2-1-4), a foreign body prevention net (2-1-5), a central cone (2-1-6), an end face flange (2-1-7), and an exhaust port (2-1-8); The central cone (2-1-6) is fixed at the bottom center of the water-gas ram cyclone (2-1) and is conical in shape; the ram cyclone baffle (2-1-3) is spirally distributed in the water-gas ram cyclone (2-1) in cross section, and the ram cyclone baffle (2-1-3) is welded to the central cone (2-1-6); The water leakage plate (2-1-2) is connected to the housing (2-1-1) via bolts at the end face flange (2-1-7); the foreign body prevention net (2-1-5) is fixed to the surface of the end face flange (2-1-7) via bolts; The housing (2-1-1) is fixed to the bracket (2-5) by bolts or welding, the water pipe (2-1-4) is obliquely inserted into the sewage tank (2-2) of the wastewater collection vehicle, and the periphery of the water pipe (2-1-4) is sealed with a sealant; The water receiving plate (2-3) is retractable; the water receiving plate (2-3) is composed of a plurality of retractable plates (2-3-1), each retractable plate (2-3-1) is a wide trough structure, and the sizes of the plurality of retractable plates (2-3-1) increase sequentially from the inside to the outside; Multiple telescopic plates (2-3-1) are connected through a slide rail (2-3-2) and are provided with a stop position. The front telescopic plate (2-3-1) is provided with a telescopic plate support rod (2-3-4) for adjusting the tilt angle of the telescopic plate (2-3-1). The last telescopic plate (2-3-1) is connected to the sewage tank (2-2) through a leak hole (2-2-5). The sewage tank (2-2) comprises: a leak hole (2-2-5) connected to the last plate, a swimming prevention plate (2-2-1), a sewage tank cover plate (2-2-4), and a sewage pipe (2-4); The anti-swimming plate (2-2-1) is fixed in the sewage tank (2-2), and the anti-swimming plate (2-2-1) is provided with holes; The transport frame (1) comprises a frame tailgate (1-1) that can be opened and closed; The wastewater purification and discharge device (3) comprises a water pump (3-1), a water purifier (3-2), a water inlet pipe (3-3), and a drain pipe (3-4).

2. The on-wing washing wastewater collection device for civil aircraft engines according to claim 1, characterized in that: The hydraulic lifting platform (4) comprises: a pressure rod (4-1), a hydraulic pump (4-2), a connecting rod assembly (4-3), a rear wheel height adjustment connecting rod assembly (4-4), a rear wheel (4-5), and a steering wheel (4-6).

3. The on-wing washing wastewater collection device for civil aircraft engines according to claim 1, characterized in that: The hydraulic lifting platform (4) and the wastewater purification and discharge device (3) are both mechanically connected to the transport frame (1) via bolts.

4. The on-wing washing wastewater collection device for civil aircraft engines according to claim 1, characterized in that: The frame tail baffle (1-1) is connected to the rear of the transport frame (1) by a hinge. When the frame tail baffle (1-1) is opened, a small slope is formed, and the wastewater collection trolley (2) is pushed onto the transport frame (1) along the small slope.

5. The on-wing washing wastewater collection device for civil aircraft engines according to claim 1, characterized in that: The water inlet pipe (3-3) of the wastewater purification and discharge device (3) is connected to the sewage discharge pipe (2-4) on the wastewater collection trolley (2). The water pump (3-1) pumps the wastewater in the wastewater collection trolley (2) to the water purifier (3-2), and then discharges the water to the outside after passing through the water purifier.

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