Aircraft sewage system cleaning device and cleaning method

Abstract

The invention discloses a cleaning device and a cleaning method for an airplane sewage system, and relates to the technical field of airplane cleaning.By means of the cleaning device and the cleaning method, cleaning liquid in a pipeline assembly is heated through a heating unit, so that the chemical activity of the cleaning liquid is good, and dirt in an airplane sewage discharging pipeline can be treated; the ultrasonic unit can transmit longitudinal high-frequency vibration waves into the cleaning liquid, and cavitation bubbles generate strong shock waves around the airplane blow-off pipeline to repeatedly impact a dirt layer until dirt falls off; meanwhile, greasy dirt excreted by a human body can be decomposed and emulsified, the inner wall of the airplane blow-off pipeline cannot be damaged by ultrasonic waves, the first ultrasonic wave generating unit can prevent dirt or greasy dirt from being bonded in the pipeline assembly, and the second ultrasonic wave generating unit can transmit the ultrasonic waves to the airplane blow-off pipeline; and in each pressure cleaning process, multiple times of bidirectional circulating cleaning are carried out, so that the cleaning effect is better, and solid waste can be thoroughly discharged.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft cleaning, and in particular to an aircraft sewage system cleaning device and a cleaning method. Background Art

[0002] After long-term use, the sewage system of an aircraft is prone to accumulation of dirt and scale on the inner wall of the sewage system pipe, the pipe bends and the joint gaps. The dirt will clog the pipe and even contaminate the sensors in the pipe, causing the system to alarm. In the prior art, the cleaning methods of the sewage system of an aircraft are usually immersion, high-pressure flushing and circulation cleaning, but the dirt is closely attached to the inner wall of the pipe, and the existing cleaning methods cannot completely clean the dirt, resulting in poor cleaning effect.

[0003] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0004] The main purpose of the present invention is to provide an aircraft sewage system cleaning device and a cleaning method, aiming to solve the technical problem of poor dirt cleaning effect of aircraft sewage system in the prior art.

[0005] To achieve the above object, according to one aspect of the present invention, a device for cleaning an aircraft sewage system is provided, comprising: A liquid storage tank for storing cleaning liquid; A pipeline assembly, comprising: a first liquid discharge pipeline, a second liquid discharge pipeline, a liquid inlet pipeline, a first connecting pipeline, a second connecting pipeline, a third connecting pipeline, a first delivery pipeline and a second delivery pipeline; the first liquid discharge pipeline, the second liquid discharge pipeline and the liquid inlet pipeline are all connected to the liquid storage tank; the liquid inlet pipeline is provided with a first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter, the filter is located between the pneumatic diaphragm pump and the first liquid discharge pipeline or the second liquid discharge pipeline, and the heating unit is located between the pneumatic diaphragm pump and the liquid storage tank; the first connecting pipeline, the second connecting pipeline, the third connecting pipeline and the second liquid discharge pipeline are connected through a four-way joint; the third connecting pipeline is connected to the The first liquid discharge pipe is connected with the first connecting pipe; the first liquid discharge pipe is connected with the second connecting pipe and the liquid inlet pipe through a three-way valve A; the second liquid discharge pipe is connected with the four-way joint and the liquid inlet pipe through a three-way valve B; the first connecting pipe is detachably connected with the first delivery pipe; the second connecting pipe is detachably connected with the second delivery pipe; the first delivery pipe is used to connect to the first sewage outlet of the aircraft sewage pipe, and the second delivery pipe is used to connect to the second sewage outlet of the aircraft sewage pipe; a second ultrasonic generating unit is provided on the first delivery pipe or the side of the delivery pipe close to the aircraft sewage pipe; each pipe in the pipe assembly is provided with a valve body.

[0006] Furthermore, the heating unit includes a fourth connecting pipeline and a heater; both ends of the fourth connecting pipeline are connected to the liquid inlet pipeline; the heater is arranged on the fourth connecting pipeline; and the fourth connecting pipeline and the liquid inlet pipeline are both provided with valve bodies.

[0007] Furthermore, the cavity above the cleaning liquid level in the liquid storage tank is an air cavity, and the air cavity is connected to the liquid inlet pipeline; the liquid storage tank is provided with an exhaust valve, a safety valve and a pressure gauge connected to the air cavity.

[0008] Furthermore, the pipeline assembly also includes a reflective layer and a thermal insulation layer; all pipelines in the pipeline assembly are provided with the reflective layer and the thermal insulation layer, and the reflective layer is located on the outside of the thermal insulation layer.

[0009] Furthermore, it also includes a processor, an ultrasonic analyzer and an ultrasonic receiver; the first ultrasonic generating unit, the second ultrasonic generating unit, the ultrasonic analyzer and the ultrasonic receiver are all electrically connected to the processor; the ultrasonic receiver is used to be arranged on a side of the aircraft sewage pipeline away from the first delivery pipeline or the second delivery pipeline.

[0010] According to another aspect of the present invention, there is provided a method for cleaning an aircraft sewage system, comprising the above-mentioned aircraft sewage system cleaning device, the aircraft sewage system cleaning method comprising the following steps: S101, connecting the first liquid discharge pipeline and the second liquid discharge pipeline to the liquid inlet pipeline, keeping the other pipelines closed, using a pneumatic diaphragm pump to discharge the cleaning liquid in the liquid storage tank from the first liquid discharge pipeline and the second liquid discharge pipeline and flow it back to the liquid storage tank through the liquid inlet pipeline, and turning on the heating unit to heat the cleaning liquid in the liquid inlet pipeline; S102, connecting the first connecting pipeline to the first sewage outlet of the aircraft sewage pipeline through the first conveying pipeline, and connecting the second connecting pipeline to the second sewage outlet of the aircraft sewage pipeline through the second conveying pipeline; S103, according to the type of aircraft, select at least two of the following steps a, b, c, d to clean the aircraft sewage pipeline; wherein, Step a: connecting the first liquid discharge pipeline with the first connecting pipeline, and connecting the second connecting pipeline with the liquid inlet pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the first liquid discharge pipeline, the first connecting pipeline and the first delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the second delivery pipeline, the second connecting pipeline and the liquid inlet pipeline; Step b: connecting the second liquid discharge pipeline with the second connecting pipeline, and connecting the second connecting pipeline with the liquid inlet pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the second liquid discharge pipeline, the second connecting pipeline and the second delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the first delivery pipeline and the liquid inlet pipeline; Step c: connecting the first liquid discharge pipeline to the first connecting pipeline, connecting the second liquid discharge pipeline and the third connecting pipeline to the liquid inlet pipeline, and connecting the second connecting pipeline to the third connecting pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the second liquid discharge pipeline, the liquid inlet pipeline, the third connecting pipeline, the second connecting pipeline and the second delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the first delivery pipeline, the first connecting pipeline and the first liquid discharge pipeline; Step d: connecting the first liquid discharge pipeline with the second connecting pipeline, connecting the second liquid discharge pipeline and the third connecting pipeline with the liquid inlet pipeline, and connecting the third connecting pipeline with the first connecting pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the second liquid discharge pipeline, the liquid inlet pipeline, the third connecting pipeline, the first connecting pipeline and the first delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the second delivery pipeline, the second connecting pipeline and the first liquid discharge pipeline; S104, turning on the first ultrasonic generating unit and the second ultrasonic generating unit to provide high-frequency vibration waves to the liquid in the pipeline assembly; S105. Connect the first liquid discharge pipeline, the second liquid discharge pipeline and the third connecting pipeline to the liquid inlet pipeline, connect the third connecting pipeline to the first connecting pipeline, disconnect the first connecting pipeline from the first delivery pipeline, and close the second connecting pipeline; use a pneumatic diaphragm pump to allow the cleaning liquid in the liquid storage tank to enter the liquid inlet pipeline through the first liquid discharge pipeline and the second liquid discharge pipeline, and then be discharged from the first connecting pipeline through the third connecting pipeline.

[0011] Furthermore, in steps S101-S105, the flow rate of each pipeline in the pipeline assembly is ≤470 lpm.

[0012] Furthermore, in step S101, the heating unit heats the cleaning liquid in the liquid inlet pipeline, and the temperature range of the heated cleaning liquid is: 40~50°C.

[0013] Furthermore, in steps S101-S105, the pressure range of the pneumatic diaphragm pump is 0.3~1MPa.

[0014] Furthermore, in steps S101-S105, the cleaning liquid in the liquid storage tank includes acidic cleaning liquid, alkaline cleaning liquid, cold clean water and hot clean water.

[0015] By using the cleaning device and cleaning method of the present invention, the cleaning liquid in the pipeline assembly is heated by a heating unit, so that the chemical activity of the cleaning liquid is better, so as to treat the dirt in the aircraft sewage pipeline; the ultrasonic unit can transmit longitudinal high-frequency vibration waves to the cleaning liquid, and the cavitation bubbles generate powerful shock waves around the aircraft sewage pipeline, repeatedly impacting the dirt layer until the dirt falls off, and at the same time, the oily dirt excreted by the human body can be decomposed and emulsified, and the ultrasonic wave will not damage the inner wall of the aircraft sewage pipeline. The first ultrasonic generating unit can prevent dirt or oil from adhering to the pipeline assembly, and the second ultrasonic generating unit can transmit the ultrasonic wave to the aircraft sewage pipeline; in each pressure cleaning process, two-way circulation cleaning is performed several times, that is, the cleaning liquid flows out from the first connecting pipeline and flows into the second connecting pipeline; or the cleaning liquid flows out from the second connecting pipeline and flows into the first connecting pipeline, so that the cleaning effect is better and it is conducive to the complete discharge of solid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 Schematic diagram of the structure of an aircraft sewage system cleaning device according to an embodiment of the present invention.

[0018] Icons: 100, liquid storage tank; 201, first liquid discharge pipeline; 202, second liquid discharge pipeline; 203, liquid inlet pipeline; 204, first connecting pipeline; 205, second connecting pipeline; 206, third connecting pipeline; 207, first delivery pipeline; 208, second delivery pipeline; 209, ultrasonic generator; 210, transducer; 211, heater; 212, pneumatic diaphragm pump; 213, filter; 214, exhaust valve; 2 15. Safety valve; 216. Pressure gauge; 301. First valve; 302. Second valve; 303. Third valve; 304. Fourth valve; 305. Fifth valve; 306. Sixth valve; 307. Seventh valve; 308. Eighth valve; 309. Ninth valve; 310. Tenth valve; 311. Eleventh valve; 312. Three-way valve A; 313. Three-way valve B; 314. Four-way connector; 401. First sewage outlet; 402. Second sewage outlet. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] Combine the following Figure 1 , describing an aircraft sewage system cleaning device and a cleaning method according to an embodiment of the present invention.

[0023] A cleaning device for an aircraft sewage system comprises: a liquid storage tank 100 for storing cleaning liquid; a pipeline assembly comprising: a first liquid discharge pipeline 201, a second liquid discharge pipeline 202, a liquid inlet pipeline 203, a first connecting pipeline 204, a second connecting pipeline 205, a third connecting pipeline 206, a first delivery pipeline 207 and a second delivery pipeline 208; the first liquid discharge pipeline 201, the second liquid discharge pipeline 202 and the liquid inlet pipeline 203 are all connected to the liquid storage tank 100; the liquid inlet pipeline 203 is provided with a first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump 212 and a filter 213, the filter 213 is located between the pneumatic diaphragm pump 212 and the first liquid discharge pipeline 201 or the second liquid discharge pipeline 202, and the heating unit is located between the pneumatic diaphragm pump 212 and the liquid storage tank 100; the first connecting pipeline 204, the second connecting pipeline 205, the third connecting pipeline 206, the second liquid discharge pipeline 207 and the second delivery pipeline 208; 02 is connected through a four-way connector 314; the third connecting pipeline 206 is connected to the liquid inlet pipeline 203; the first drain pipe is connected to the first connecting pipeline 204; the first drain pipeline 201 is connected to the second connecting pipeline 205 and the liquid inlet pipeline 203 through a three-way valve A312; the second drain pipeline 202 is connected to the four-way connector 314 and the liquid inlet pipeline 203 through a three-way valve B313; the first connecting pipeline 204 is detachably connected to the first delivery pipeline 207; the second connecting pipeline 205 is detachably connected to the second delivery pipeline 208; the first delivery pipeline 207 is used to connect to the first sewage outlet 401 of the aircraft sewage pipeline, and the second delivery pipeline 208 is used to connect to the second sewage outlet 402 of the aircraft sewage pipeline; a second ultrasonic generating unit is provided on the side of the first delivery pipeline 207 or the second delivery pipeline 208 close to the aircraft sewage pipeline; each pipeline in the pipeline assembly is provided with a valve body.

[0024] One end of the first liquid discharge pipeline 201 is connected to the liquid storage tank 100, and the other end is connected to the second connecting pipeline 205. The first liquid discharge pipeline 201 is provided with a first valve 301; the first liquid discharge pipeline 201 can be provided with a pipeline for connecting to the interface x of the three-way valve A312; the interface y of the three-way valve A312 can be connected to the liquid inlet pipeline 203 through a pipeline, and the second valve 302 is provided on the pipeline; the interface z of the three-way valve A312 can be connected to the second connecting pipeline 205 through a pipeline.

[0025] A third valve 303 may be provided on the first connecting pipeline 204 ; and a fourth valve 304 may be provided on the second connecting pipeline 205 .

[0026] A fifth valve 305 may be provided on the liquid inlet pipeline 203 , and the fifth valve 305 is located between the heating unit and the liquid storage tank 100 .

[0027] A sixth valve 306 may be disposed on the third connecting pipeline 206 .

[0028] The liquid storage tank 100 may be provided with a pipeline for discharging the cleaning liquid to the outside and a seventh valve 307 is provided on the pipeline.

[0029] In one embodiment, the heating unit includes a fourth connecting pipeline and a heater 211; both ends of the fourth connecting pipeline are connected to the liquid inlet pipeline 203; the heater 211 is arranged on the fourth connecting pipeline; and the fourth connecting pipeline and the liquid inlet pipeline 203 are both provided with valve bodies.

[0030] The two ends of the fourth connecting pipeline are connected to the liquid inlet pipeline 203 at points C and D respectively. The pipeline of the liquid inlet pipeline 203 between points C and D is provided with an eighth valve 308; the pipeline between the heater 211 and point C is provided with a ninth valve 309, and the pipeline between the heater 211 and point D is provided with a tenth valve 310.

[0031] A thermometer may be provided on the fourth connecting pipeline, and the operator may observe the temperature of the cleaning liquid in the pipeline through the thermometer, and then control the working time of the heater 211 to keep the temperature of the cleaning liquid in the pipeline within a threshold value, for example, 40-50°C.

[0032] In some embodiments, a temperature sensor may be provided on the fourth connecting pipeline, the aircraft sewage system cleaning device includes a processor, the temperature sensor and the heater 211 are electrically connected to the processor, and when the temperature sensor detects that the temperature of the cleaning liquid in the fourth connecting pipeline is lower than a threshold value, the temperature sensor transmits a temperature signal to the processor, and the processor controls the heater 211 to operate according to the temperature signal to heat the cleaning liquid in the pipeline.

[0033] The pipeline of the liquid inlet pipeline 203 between the pneumatic diaphragm pump 212 and the filter 213 is provided with a pipeline for discharging the cleaning liquid, and the pipeline is provided with an eleventh valve 311.

[0034] The three-way valve A 312 and the three-way valve B 313 can both be three-way ball valves. The first valve 301 to the eleventh valve 311 can both be manual ball valves.

[0035] The materials of the first liquid discharge pipeline 201, the second liquid discharge pipeline 202, the liquid inlet pipeline 203, the first connecting pipeline 204, the second connecting pipeline 205, the third connecting pipeline 206, the first delivery pipeline 207 and the second delivery pipeline 208 can be selected as needed. For example, the first liquid discharge pipeline 201, the second liquid discharge pipeline 202, the liquid inlet pipeline 203, the first connecting pipeline 204, the second connecting pipeline 205 and the third connecting pipeline 206 can be made of hard materials, and the first delivery pipeline 207 and the second delivery pipeline 208 can be hoses.

[0036] In one embodiment, the cavity above the cleaning liquid level in the liquid storage tank 100 is an air cavity, and the air cavity is connected to the liquid inlet pipeline 203.

[0037] After the heating unit heats the cleaning liquid in the liquid inlet pipeline 203, the heated cleaning liquid will partially evaporate to produce steam; the pneumatic diaphragm pump 212 pumps air into the liquid inlet pipeline 203, which will also cause gas to exist in the pipeline; a large amount of cleaning liquid will carry gas and gather in the liquid storage tank 100, so that an air cavity exists in the upper part of the liquid storage tank 100.

[0038] The liquid storage tank 100 is provided with an exhaust valve 214, a safety valve 215 and a pressure gauge 216 which are communicated with the air cavity.

[0039] The operator determines the air pressure in the liquid storage tank 100 by observing the pressure gauge 216, and opens the exhaust valve 214 to discharge the gas in the air cavity to avoid high air pressure in the liquid storage tank 100; when the air pressure in the air cavity is greater than the threshold, the safety valve 215 can automatically discharge the gas.

[0040] In one embodiment, the pipeline assembly further includes a reflective layer and a thermal insulation layer; all pipelines in the pipeline assembly are provided with a reflective layer and a thermal insulation layer, and the reflective layer is located outside the thermal insulation layer. The thermal insulation layer can be made of glass wool, rock wool, polyurethane foam, rubber and plastic thermal insulation materials, etc. These materials have low thermal conductivity and can effectively reduce heat loss. The reflective layer can be made of aluminum foil to reflect thermal radiation and reduce heat loss.

[0041] In one embodiment, the first ultrasonic generating unit and the second ultrasonic generating unit both include an ultrasonic generator 209 and a transducer 210 connected to each other; in the first ultrasonic generating unit, the transducer 210 is connected to the liquid inlet pipeline 203, and the transducer 210 is located between the liquid storage tank 100 and the heating unit. In the second ultrasonic generating unit, the transducer 210 is connected to the first delivery pipeline 207 or the second delivery pipeline 208 (not shown in the figure).

[0042] The function of the ultrasonic generator 209 is to convert electrical energy into a high-frequency alternating current signal that matches the ultrasonic transducer 210. The transducer 210 converts electrical energy into mechanical energy, so that the microbubbles in the cleaning liquid maintain high-frequency vibration under the action of sound waves. The shock waves generated by the rupture of countless tiny cavitation bubbles are the "cavitation" phenomenon of ultrasound. The ultrasonic waves in the liquid inlet pipeline 203 are transmitted to the pipeline assembly through the cleaning liquid to prevent dirt or oil from adhering to the pipeline assembly. The second ultrasonic generating unit transmits the ultrasonic wave to the aircraft sewage pipeline through the cleaning liquid. The dirt on the pipe wall is fatigued and destroyed under the action of high-frequency alternating stress and is removed, gradually loosened, softened and falls off, thereby achieving the purpose of descaling.

[0043] In one embodiment, the cleaning device also includes a processor, an ultrasonic analyzer and an ultrasonic receiver; the first ultrasonic generating unit, the second ultrasonic generating unit, the ultrasonic analyzer and the ultrasonic receiver are all electrically connected to the processor; the ultrasonic receiver is used to be arranged on a side of the aircraft sewage pipeline away from the first delivery pipeline or the second delivery pipeline.

[0044] Cleaning fluids with different turbidities have different absorption and scattering characteristics of ultrasonic waves. Therefore, an ultrasonic receiver is set on the side of the aircraft sewage pipeline away from the first delivery pipeline or the second delivery pipeline. The ultrasonic receiver can receive the ultrasonic waves emitted by the second ultrasonic generating unit and transmitted in the aircraft sewage pipeline. The ultrasonic analyzer can analyze the attenuation characteristics of the ultrasonic waves to determine the turbidity of the cleaning fluid. The faster the ultrasonic wave attenuates, the more turbid the cleaning fluid is, and the processor controls the second ultrasonic generating unit to emit a higher frequency of ultrasonic waves.

[0045] The cleaning device can be integrated together, and a forklift position and casters can be arranged under the cleaning device so as to be dragged by a forklift, a lift or manpower.

[0046] A method for cleaning an aircraft sewage system, comprising the above-mentioned aircraft sewage system cleaning device, the aircraft sewage system cleaning method comprising the following steps: S101, connect the first liquid discharge pipeline 201 and the second liquid discharge pipeline 202 to the liquid inlet pipeline 203, keep the other pipelines closed, use the pneumatic diaphragm pump 212 to discharge the cleaning liquid in the liquid storage tank 100 from the first liquid discharge pipeline 201 and the second liquid discharge pipeline 202 and let it flow back to the liquid storage tank 100 through the liquid inlet pipeline 203, and turn on the heating unit to heat the cleaning liquid in the liquid inlet pipeline 203.

[0047] Open the x and y ports of the three-way valve A312, and close the z port of the three-way valve A312; open the x and y ports of the three-way valve B313, and close the z port of the three-way valve B313; open the second valve 302, the ninth valve 309, the tenth valve 310 and the fifth valve 305, and close the remaining valve bodies in the pipeline assembly.

[0048] The cleaning liquid in the liquid storage tank 100 enters the liquid inlet pipeline 203 from the first liquid discharge pipeline 201 through the x, y ports of the three-way valve A312, and the cleaning liquid enters the liquid inlet pipeline 203 from the second liquid discharge pipeline 202 through the x, y ports of the three-way valve B313. The cleaning liquid passes through the filter 213, the pneumatic diaphragm pump 212, the tenth valve 310, the heater 211, the ninth valve 309 and the fifth valve 305 along the liquid inlet pipeline 203 and then enters the liquid storage tank 100, thereby realizing the heated internal circulation of the cleaning liquid.

[0049] S102 , connecting the first connecting pipeline 204 to the first sewage outlet 401 of the aircraft sewage pipeline through the first conveying pipeline 207 , and connecting the second connecting pipeline 205 to the second sewage outlet 402 of the aircraft sewage pipeline through the second conveying pipeline 208 .

[0050] The interfaces of the first delivery pipeline 207 and the second delivery pipeline 208 can both be aircraft-specific quick-release connectors, which are highly versatile and easy to operate.

[0051] The first drain port 401 and the second drain port 402 of the aircraft drain pipe are located at the tail of the aircraft. The nose of the aircraft also has two interfaces connected to the aircraft drain pipe. The two interfaces can be connected through an external pipe so that the cleaning liquid can circulate in the aircraft drain pipe.

[0052] S103, according to the type of aircraft, select at least two of the following steps a, b, c, d to clean the aircraft sewage pipeline; wherein, Step a: connect the first liquid discharge pipeline 201 with the first connecting pipeline 204, and connect the second connecting pipeline 205 with the liquid inlet pipeline 203; use the pneumatic diaphragm pump 212 to allow the cleaning liquid in the liquid storage tank 100 to enter the aircraft sewage pipeline circulation through the first liquid discharge pipeline 201, the first connecting pipeline 204 and the first delivery pipeline 207, and the circulated cleaning liquid flows back to the liquid storage tank 100 after passing through the second delivery pipeline 208, the second connecting pipeline 205 and the liquid inlet pipeline 203.

[0053] Open the x and z ports of the three-way valve A312, and close the y port of the three-way valve A312; open the x and z ports of the three-way valve B313, and close the y port of the three-way valve B313; open the fourth valve 304, the eighth valve 308 and the fifth valve 305, and close the remaining valve bodies in the pipeline assembly.

[0054] The cleaning liquid in the liquid storage tank 100 enters the first connecting pipeline 204 from the first discharge pipeline 201 through the x and z ports of the three-way valve A312, and then enters the aircraft sewage pipeline from the first delivery pipeline 207 for circulation. The circulated cleaning liquid enters the second connecting pipeline 205 from the second delivery pipeline 208, passes through the fourth valve 304, the z and x ports of the three-way valve B313, the filter 213, the pneumatic diaphragm pump 212, the eighth valve 308 and the fifth valve 305, and then enters the liquid storage tank 100.

[0055] Step b: connect the second drainage pipeline 202 with the second connecting pipeline 205, and connect the second connecting pipeline 205 with the liquid inlet pipeline 203; use the pneumatic diaphragm pump 212 to allow the cleaning liquid in the liquid storage tank 100 to enter the aircraft sewage pipeline for circulation through the second drainage pipeline 202, the second connecting pipeline 205 and the second delivery pipeline 208, and the circulated cleaning liquid flows back to the liquid storage tank 100 after passing through the first delivery pipeline 207 and the liquid inlet pipeline 203.

[0056] Open the y and z ports of the three-way valve A312, and close the x port of the three-way valve A312; open the y and z ports of the three-way valve B313, and close the x port of the three-way valve B313; open the second valve 302, the fourth valve 304, the eighth valve 308 and the fifth valve 305, and close the remaining valve bodies in the pipeline assembly.

[0057] The cleaning liquid in the liquid storage tank 100 enters the second connecting pipeline 205 from the second discharge pipeline 202 through the y, z ports of the three-way valve B313, and then enters the aircraft sewage pipeline from the second delivery pipeline 208 for circulation. The circulated cleaning liquid enters the first connecting pipeline 204 from the first delivery pipeline 207, passes through the z, y ports of the three-way valve A312, the second valve 302, the filter 213, the pneumatic diaphragm pump 212, the eighth valve 308 and the fifth valve 305, and then enters the liquid storage tank 100.

[0058] Step c: connect the first liquid discharge line 201 with the first connecting line 204, connect the second liquid discharge line 202 and the third connecting line 206 with the liquid inlet line 203, and connect the second connecting line 205 with the third connecting line 206; use the pneumatic diaphragm pump 212 to allow the cleaning liquid in the liquid storage tank 100 to enter the aircraft sewage pipeline for circulation via the second liquid discharge line 202, the liquid inlet line 203, the third connecting line 206, the second connecting line 205 and the second delivery line 208, and the circulated cleaning liquid flows back to the liquid storage tank 100 via the first delivery line 207, the first connecting line 204 and the first liquid discharge line 201.

[0059] Open the x and y ports of three-way valve A312, and close the z port of three-way valve A312; open the x and z ports of three-way valve B313, and close the y port of three-way valve B313; open the fourth valve 304, the eighth valve 308 and the sixth valve 306, and close the remaining valve bodies in the pipeline assembly.

[0060] The cleaning liquid in the liquid storage tank 100 enters the liquid inlet pipeline 203 from the second liquid discharge pipeline 202 through the y and x ports of the three-way valve B313, enters the second connecting pipeline 205 after passing through the filter 213, the pneumatic diaphragm pump 212, the eighth valve 308, the sixth valve 306 and the fourth valve 304, and then enters the aircraft sewage pipeline from the second delivery pipeline 208 for circulation. The circulated cleaning liquid enters the first connecting pipeline 204 from the first delivery pipeline 207, passes through the z and x ports of the three-way valve A312, and then enters the liquid storage tank 100 along the first liquid discharge pipeline 201.

[0061] Step d: connect the first liquid discharge pipeline 201 with the second connecting pipeline 205, connect the second liquid discharge pipeline 202 and the third connecting pipeline with the liquid inlet pipeline 203, and connect the third connecting pipeline 206 with the first connecting pipeline 204; use the pneumatic diaphragm pump 212 to allow the cleaning liquid in the liquid storage tank 100 to enter the aircraft sewage pipeline circulation through the second liquid discharge pipeline 202, the liquid inlet pipeline 203, the third connecting pipeline 206, the first connecting pipeline 204 and the first delivery pipeline 207, and the circulated cleaning liquid flows back to the liquid storage tank 100 after passing through the second delivery pipeline 208, the second connecting pipeline 205 and the first liquid discharge pipeline 201.

[0062] Open the x and y ports of the three-way valve B313, and close the z port of the three-way valve B313; open the first valve 301, the third valve 303, the eighth valve 308 and the sixth valve 306, and close the remaining valve bodies in the pipeline assembly.

[0063] The cleaning liquid in the liquid storage tank 100 enters the liquid inlet pipeline 203 from the second liquid discharge pipeline 202 through the y, x ports of the three-way valve B313, enters the first connecting pipeline 204 after passing through the filter 213, the pneumatic diaphragm pump 212, the eighth valve 308, the sixth valve 306 and the third valve 303, and then enters the aircraft sewage pipeline from the first delivery pipeline 207 for circulation. The circulated cleaning liquid enters the second connecting pipeline 205 from the second delivery pipeline 208, passes through the first valve 301, and then enters the liquid storage tank 100 along the first liquid discharge pipeline 201.

[0064] In each pressure cleaning process, two-way circulation cleaning is performed several times, that is, the cleaning liquid flows out from the first connecting pipeline 204 and flows into the second connecting pipeline 205; or the cleaning liquid flows out from the second connecting pipeline 205 and flows into the first connecting pipeline 204, so that the cleaning effect is better and it is conducive to the complete discharge of solid waste.

[0065] The cleaning time is determined by the thickness of the scale and is usually 1 to 2 hours.

[0066] S104, turning on the first ultrasonic generating unit and the second ultrasonic generating unit to provide high-frequency vibration waves to the liquid in the pipeline assembly.

[0067] The ultrasonic generating unit is required to work during the entire cleaning process. It continuously transmits longitudinal high-frequency vibration waves to the liquid. Cavitation bubbles generate powerful shock waves around them, which repeatedly impact the dirt layer until the dirt falls off. At the same time, it can also decompose and emulsify the greasy dirt excreted by the human body. The ultrasonic wave does not damage the inner wall of the aircraft sewage pipe. The first ultrasonic generating unit can prevent dirt or oil from adhering to the pipe assembly, and the second ultrasonic generating unit can transmit the ultrasonic wave to the aircraft sewage pipe.

[0068] S105, connect the first liquid discharge pipeline 201, the second liquid discharge pipeline 202 and the third connecting pipeline 206 to the liquid inlet pipeline 203, connect the third connecting pipeline 206 to the first connecting pipeline 204, disconnect the first connecting pipeline 204 from the first delivery pipeline 207, and close the second connecting pipeline 205; use the pneumatic diaphragm pump 212 to allow the cleaning liquid in the liquid storage tank 100 to enter the liquid inlet pipeline 203 through the first liquid discharge pipeline 201 and the second liquid discharge pipeline 202, and then be discharged from the first connecting pipeline 204 through the third connecting pipeline 206.

[0069] Open the x and y ports of the three-way valve A312, and close the z port of the three-way valve A312; open the x and y ports of the three-way valve B313, and close the z port of the three-way valve B313; open the second valve 302, the third valve 303, the sixth valve 306 and the eighth valve 308, and close the remaining valve bodies in the pipeline assembly.

[0070] The cleaning liquid in the liquid storage tank 100 enters the liquid inlet pipeline 203 from the first liquid discharge pipeline 201 through the x, y ports of the three-way valve A312, and enters the liquid inlet pipeline 203 from the second liquid discharge pipeline 202 through the y, x ports of the three-way valve B313; after passing through the filter 213, the pneumatic diaphragm pump 212, the eighth valve 308, the sixth valve 306 and the third valve 303, it is discharged from the first connecting pipeline 204.

[0071] The filter 213 is used to collect dirt that has escaped from the aircraft sewage pipeline, isolate the dirt from the cleaning liquid, and prevent the dirt from flowing to the pneumatic diaphragm pump 212.

[0072] When cleaning the aircraft sewage pipe with cleaning fluid, the cleaning fluid needs to be heated. After the cleaning fluid has finished cleaning the aircraft sewage pipe, cold and hot clean water can be used for circulating rinses according to different temperature environments. For example, hot clean water can be used for cleaning in winter and cold clean water can be used for cleaning in summer to further remove dirt particles on the edges, corners, pores, and suspended on the inner wall of the aircraft sewage pipe, and to minimize the residual amount of cleaning fluid in the aircraft sewage pipe to meet the aircraft airworthiness requirements.

[0073] In one embodiment, in steps S101-S105, the flow rate of each pipeline in the pipeline assembly is ≤470 lpm, specifically: the flow rate is ≤454 lpm. The flow rate can be changed by the pressure of the pneumatic diaphragm pump.

[0074] In one embodiment, in step S101, the heating unit heats the cleaning liquid in the liquid inlet pipeline 203, and the temperature of the cleaning liquid after heating may be in the range of 40-50°C.

[0075] In one embodiment, in steps S101-S105, the pressure range of the pneumatic diaphragm pump 212 is 0.3-1 MPa, specifically, 0.4-0.86 MPa.

[0076] In one embodiment, in steps S101-S105, the cleaning liquid in the liquid storage tank 100 may include acidic cleaning liquid, alkaline cleaning liquid, cold clean water and hot clean water.

[0077] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An aircraft sewage system cleaning device, characterized in that: include: A liquid storage tank for storing cleaning liquid; A pipeline assembly, comprising: a first liquid discharge pipeline, a second liquid discharge pipeline, a liquid inlet pipeline, a first connecting pipeline, a second connecting pipeline, a third connecting pipeline, a first delivery pipeline and a second delivery pipeline; the first liquid discharge pipeline, the second liquid discharge pipeline and the liquid inlet pipeline are all connected to the liquid storage tank; the liquid inlet pipeline is provided with a first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter, the filter is located between the pneumatic diaphragm pump and the first liquid discharge pipeline or the second liquid discharge pipeline, and the heating unit is located between the pneumatic diaphragm pump and the liquid storage tank; the first connecting pipeline, the second connecting pipeline, the third connecting pipeline and the second liquid discharge pipeline are connected through a four-way joint; the third connecting pipeline is connected to the inlet pipeline; the first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter are provided in the inlet pipeline; ... first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter are provided in the inlet pipeline; the first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter are provided in the inlet pipeline; the first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter are provided in the inlet pipeline; the first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter are provided in the inlet pipeline; the first ultrasonic generating unit, a heating unit, a pneumatic diaphragm pump and a filter are provided in the inlet pipeline; the first ultrasonic The first liquid discharge pipe is connected to the first connecting pipeline; the first liquid discharge pipeline is connected to the second connecting pipeline and the liquid inlet pipeline through a three-way valve A; the second liquid discharge pipeline is connected to the four-way joint and the liquid inlet pipeline through a three-way valve B; the first connecting pipeline is detachably connected to the first delivery pipeline; the second connecting pipeline is detachably connected to the second delivery pipeline; the first delivery pipeline is used to connect to the first sewage outlet of the aircraft sewage pipeline, and the second delivery pipeline is used to connect to the second sewage outlet of the aircraft sewage pipeline; a second ultrasonic generating unit is provided on the side of the first delivery pipeline or the second delivery pipeline close to the aircraft sewage pipeline; each pipeline in the pipeline assembly is provided with a valve body.

2. The aircraft sewage system cleaning device according to claim 1, characterized in that: The heating unit comprises a fourth connecting pipeline and a heater; both ends of the fourth connecting pipeline are connected to the liquid inlet pipeline; the heater is arranged on the fourth connecting pipeline; the fourth connecting pipeline and the liquid inlet pipeline are both provided with valve bodies.

3. The aircraft sewage system cleaning device according to claim 1, characterized in that: The cavity above the cleaning liquid level in the liquid storage tank is an air cavity, and the air cavity is connected to the liquid inlet pipeline; the liquid storage tank is provided with an exhaust valve, a safety valve and a pressure gauge connected to the air cavity.

4. The aircraft sewage system cleaning device according to claim 1, characterized in that: The pipeline assembly further comprises a reflective layer and a heat-insulating layer; all pipelines in the pipeline assembly are provided with the reflective layer and the heat-insulating layer, and the reflective layer is located outside the heat-insulating layer.

5. The aircraft sewage system cleaning device according to claim 1, characterized in that: It also includes a processor, an ultrasonic analyzer and an ultrasonic receiver; the first ultrasonic generating unit, the second ultrasonic generating unit, the ultrasonic analyzer and the ultrasonic receiver are all electrically connected to the processor; the ultrasonic receiver is used to be arranged on a side of the aircraft sewage pipeline away from the first delivery pipeline or the second delivery pipeline.

6. A method for cleaning an aircraft sewage system, comprising the aircraft sewage system cleaning device according to any one of claims 1 to 5, characterized in that: The aircraft sewage system cleaning method comprises the following steps: S101, connecting the first liquid discharge pipeline and the second liquid discharge pipeline to the liquid inlet pipeline, keeping the other pipelines closed, using a pneumatic diaphragm pump to discharge the cleaning liquid in the liquid storage tank from the first liquid discharge pipeline and the second liquid discharge pipeline and flow it back to the liquid storage tank through the liquid inlet pipeline, and turning on the heating unit to heat the cleaning liquid in the liquid inlet pipeline; S102, connecting the first connecting pipeline to the first sewage outlet of the aircraft sewage pipeline through the first conveying pipeline, and connecting the second connecting pipeline to the second sewage outlet of the aircraft sewage pipeline through the second conveying pipeline; S103, according to the type of aircraft, select at least two of the following steps a, b, c, d to clean the aircraft sewage pipeline; wherein, Step a: connecting the first liquid discharge pipeline with the first connecting pipeline, and connecting the second connecting pipeline with the liquid inlet pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the first liquid discharge pipeline, the first connecting pipeline and the first delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the second delivery pipeline, the second connecting pipeline and the liquid inlet pipeline; Step b: connecting the second liquid discharge pipeline with the second connecting pipeline, and connecting the second connecting pipeline with the liquid inlet pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the second liquid discharge pipeline, the second connecting pipeline and the second delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the first delivery pipeline and the liquid inlet pipeline; Step c: connecting the first liquid discharge pipeline to the first connecting pipeline, connecting the second liquid discharge pipeline and the third connecting pipeline to the liquid inlet pipeline, and connecting the second connecting pipeline to the third connecting pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the second liquid discharge pipeline, the liquid inlet pipeline, the third connecting pipeline, the second connecting pipeline and the second delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the first delivery pipeline, the first connecting pipeline and the first liquid discharge pipeline; Step d: connecting the first liquid discharge pipeline with the second connecting pipeline, connecting the second liquid discharge pipeline and the third connecting pipeline with the liquid inlet pipeline, and connecting the third connecting pipeline with the first connecting pipeline; using a pneumatic diaphragm pump, the cleaning liquid in the liquid storage tank enters the aircraft sewage pipeline for circulation through the second liquid discharge pipeline, the liquid inlet pipeline, the third connecting pipeline, the first connecting pipeline and the first delivery pipeline, and the circulated cleaning liquid flows back to the liquid storage tank after passing through the second delivery pipeline, the second connecting pipeline and the first liquid discharge pipeline; S104, turning on the first ultrasonic generating unit and the second ultrasonic generating unit to provide high-frequency vibration waves to the liquid in the pipeline assembly; S105. Connect the first liquid discharge pipeline, the second liquid discharge pipeline and the third connecting pipeline to the liquid inlet pipeline, connect the third connecting pipeline to the first connecting pipeline, disconnect the first connecting pipeline from the first delivery pipeline, and close the second connecting pipeline; use a pneumatic diaphragm pump to allow the cleaning liquid in the liquid storage tank to enter the liquid inlet pipeline through the first liquid discharge pipeline and the second liquid discharge pipeline, and then be discharged from the first connecting pipeline through the third connecting pipeline.

7. The aircraft sewage system cleaning method according to claim 6, characterized in that: In steps S101-S105, the flow rate of each pipeline in the pipeline assembly is ≤470 lpm.

8. The aircraft sewage system cleaning method according to claim 6, characterized in that: In step S101, the heating unit heats the cleaning liquid in the liquid inlet pipeline, and the temperature range of the heated cleaning liquid is: 40~50°C.

9. The aircraft sewage system cleaning method according to claim 6, characterized in that: In steps S101-S105, the pressure range of the pneumatic diaphragm pump is 0.3~1MPa.

10. The aircraft sewage system cleaning method according to claim 6, characterized in that: In steps S101-S105, the cleaning liquid in the liquid storage tank includes acidic cleaning liquid, alkaline cleaning liquid, cold clean water and hot clean water.

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