Aircraft sewage line cleaning system

Abstract

The utility model discloses an airplane sewage pipeline cleaning system includes: cleaning device, positive pressure pump liquid device, negative pressure pump liquid device and heating device, and cleaning device includes liquid storage tank, first cleaning interface, second cleaning interface and cleaning pump, and positive pressure pump liquid device includes positive pressure pump liquid pipeline and positive pressure pump liquid valve, and negative pressure pump liquid device includes first negative pressure pipeline, second negative pressure pipeline and third negative pressure pipeline, the airplane sewage pipeline cleaning system of the utility model through setting up cleaning device, positive pressure pump liquid device, negative pressure pump liquid device and heating device can adopt automatic numerical control system to carry out electric control to each valve, thereby can carry out positive and negative pressure mode's pump liquid in short time, thereby make the whole cleaning efficiency improve. Meanwhile, can carry out positive pressure and negative pressure's cleaning mode pump liquid to different cleaning situation, thereby adapt to different cleaning scene, make the whole cleaning operation more effective and convenient.

Description

Technical Field

[0001] This utility model relates to the field of aircraft wastewater cleaning technology, and in particular to an aircraft wastewater pipeline cleaning system. Background Technology

[0002] Currently, aircraft pipeline cleaning equipment typically uses either a single positive or negative pressure pump to clean the pipelines, which is quite complex. Furthermore, in the cleaning of large aircraft, due to their high altitude, negative pressure cleaning can easily lead to insufficient pressure in the pipelines, affecting the cleaning effect. Consequently, existing cleaning equipment needs to be lifted using a lift, which requires more manpower and resources. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an aircraft sewage pipeline cleaning system.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A wastewater pipeline cleaning system for aircraft includes: a cleaning device, a negative pressure pumping device, and a pressurizing device. The cleaning device includes a storage tank, a first cleaning port, a second cleaning port, and a cleaning pump. The first cleaning port is connected to the storage tank via a first pipe, and a first control valve and a second control valve are respectively installed on the first pipe. The second cleaning port is connected to the cleaning pump via a second pipe, and a third control valve is installed on the second pipe. The cleaning pump is connected to the storage tank via a third pipe, and a fourth control valve is installed on the third pipe. The negative pressure pumping device includes a first negative pressure pipe, a second negative pressure pipe, and a third negative pressure pipe. The first negative pressure pipe is connected to both the third pipe and the positive pressure pumping pipe. A first negative pressure control valve is installed on the first negative pressure pipe, and a second negative pressure control valve is installed on the third negative pressure pipe. The pipelines are respectively connected to the third pipeline and the second pipeline. A second negative pressure control valve is provided on the second negative pressure pipeline. The third negative pressure pipeline is respectively connected to the second negative pressure pipeline and the first pipeline, and the connection end of the third negative pressure pipeline and the first pipeline is located between the first control valve and the second control valve. A third negative pressure control valve is provided on the third negative pressure pipeline. The pressurizing device includes a pressurizing pump, a buffer tank, and a drainage pipe. The pressurizing pump is connected to the buffer tank through a first pressurizing pipeline. A first pressurizing control valve is provided on the first pressurizing pipeline. The buffer tank is connected to the liquid storage tank through a second pressurizing pipeline. A second pressurizing control valve is provided on the second pressurizing pipeline. The drainage pipe is respectively connected to the buffer tank and the second pipeline. A drainage control valve is provided on the drainage pipe.

[0006] In one embodiment, a heating device is also included, the heating device including a heating pipe connected to the liquid storage tank and the second pipe respectively, and a heating control valve is provided on the heating pipe.

[0007] In one embodiment, the heating device further includes a heater disposed on the third pipe.

[0008] In one embodiment, the heater is located between the fourth control valve and the cleaning pump.

[0009] In one embodiment, a positive pressure pumping device is also included, which includes a positive pressure pumping pipeline and a positive pressure pumping valve. The positive pressure pumping pipeline is connected to the first pipeline and the second pipeline respectively, and the positive pressure pumping valve is disposed on the positive pressure pumping pipeline.

[0010] In one embodiment, the pressurization device further includes an injector connected to the buffer tank via a first injection pipe, the first injection pipe being equipped with an injection control valve.

[0011] In one embodiment, the first control valve, the second control valve, the third control valve, the fourth control valve, the first negative pressure control valve, the second negative pressure control valve, the third negative pressure control valve, the first pressurization control valve, the second pressurization control valve, and the drainage control valve are all solenoid valves.

[0012] In one embodiment, the storage tank contains a cleaning agent.

[0013] Compared with the prior art, the present invention has at least the following advantages:

[0014] 1. This utility model's aircraft wastewater pipeline cleaning system, by incorporating a cleaning device, a positive pressure pumping device, a negative pressure pumping device, and a heating device, enables automated numerical control systems to electrically control each valve. This allows for rapid switching between positive and negative pressure pumping modes, thereby improving overall cleaning efficiency. Furthermore, it allows for switching between positive and negative pressure pumping modes to adapt to different cleaning scenarios, making the overall cleaning operation more effective and convenient.

[0015] 2. The aircraft sewage pipeline cleaning system of this utility model can increase the pressure inside the pipeline by setting a pressurization device, so that the negative pressure cleaning mode can be cleaned under sufficient negative pressure intensity. This can avoid the failure of the negative pressure cleaning mode to start due to insufficient pressure, and can adapt to the overall altitude of large aircraft for negative pressure cleaning. There is no need to use lifting equipment to raise the aircraft sewage pipeline cleaning system, thus saving manpower and material resources. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0017] Figure 1 This is a schematic diagram of the structure of an aircraft wastewater pipeline cleaning system according to one embodiment of the present invention. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. Please refer to... Figure 1 An aircraft wastewater pipeline cleaning system 10 includes: a cleaning device 100, a positive pressure pumping device 200, a negative pressure pumping device 300, and a heating device 400. The cleaning device 100 includes a storage tank 110, a first cleaning port 120, a second cleaning port 130, and a cleaning pump 140. The first cleaning port 120 is connected to the storage tank 110 through a first pipe 150. A first control valve 151 and a second control valve 152 are respectively installed on the first pipe 150. The second cleaning port... Port 130 is connected to the cleaning pump via a second pipe 160, and a third control valve 161 is installed on the second pipe 160. The cleaning pump 140 is connected to the storage tank 110 via a third pipe 170, and a fourth control valve 171 is installed on the third pipe 170. The positive pressure pumping device 200 includes a positive pressure pumping pipe 210 and a positive pressure pumping valve 220. The positive pressure pumping pipe 210 is connected to the first pipe 150 and the second pipe 160 respectively, and the positive pressure pumping valve 220 is installed on the positive pressure pumping pipe. On channel 210; the negative pressure pumping device 300 includes a first negative pressure pipe 310, a second negative pressure pipe 320, and a third negative pressure pipe 330. The first negative pressure pipe 310 is connected to the third pipe 170 and the positive pressure pumping pipe 210, and a first negative pressure control valve 311 is installed on the first negative pressure pipe 310. The second negative pressure pipe 320 is connected to the third pipe 170 and the second pipe 160, and a second negative pressure control valve 321 is installed on the second negative pressure pipe 320. The third negative pressure... Pipeline 330 is connected to the second negative pressure pipeline 320 and the first pipeline 150 respectively, and the connection end of the third negative pressure pipeline 330 and the first pipeline 150 is located between the first control valve 151 and the second control valve 152. A third negative pressure control valve 331 is provided on the third negative pressure pipeline 330; the heating device 400 includes a heating pipeline 410, which is connected to the liquid storage tank 110 and the second pipeline 160 respectively, and a heating control valve 411 is provided on the heating pipeline 410.

[0019] It should be noted that the first control valve 151, the second control valve 152, the third control valve 161, the fourth control valve 171, the positive pressure pump valve 220, the first negative pressure control valve 311, the second negative pressure control valve 321, the third negative pressure control valve 331, and the heating control valve 411 are all electrically controllable solenoid valves. This allows for the use of an automated numerical control system to electrically control each valve, enabling rapid switching between positive and negative pressure pump modes, thereby improving overall cleaning efficiency. Specifically, the first cleaning interface 120 and the second cleaning interface 130 are connected to the left and right drain outlets on the aircraft, respectively, thus establishing communication with the aircraft's wastewater pipeline. When cleaning is required, the corresponding spray mode is switched by adjusting the on / off settings of each control valve.When positive pressure liquid spraying is used, the cleaning fluid in the reservoir 110 is first drawn into the cleaning pump 140, and then enters the aircraft wastewater pipe through the corresponding pipeline from the first cleaning port 120 or the second cleaning port 130. For example, when positive pressure liquid spraying mode one is used, the corresponding control system opens the fourth control valve 171, the positive pressure pump valve 220, the third negative pressure control valve 331, and the first control valve 151, and closes the second control valve 152, the third control valve 161, the first negative pressure control valve 311, the second negative pressure control valve 321, and the heating control valve 411. At this time, the positive pressure liquid spraying mode is activated. The cleaning flow is as follows: the cleaning fluid in the storage tank 110 enters the cleaning pump 140 through the third pipe 170, and then flows from the positive pressure pumping pipe 210 to the first cleaning port 120 and into the aircraft wastewater pipe. After the aircraft wastewater pipe is full, the liquid flows out from the second cleaning port 130. Since the third negative pressure control valve 331 and the first control valve 151 are open, the liquid flowing out from the second cleaning port 130 will enter the storage tank 110 through the pipes on the third negative pressure control valve 331 and the first control valve 151, thus filling the pipe with liquid; when sampling... When using positive pressure spray mode two, the corresponding control system opens the first control valve 151, the second control valve 152, the third control valve 161, and the fourth control valve 171, and closes the positive pressure pump valve 220, the first negative pressure control valve 311, the second negative pressure control valve 321, the third negative pressure control valve 331, and the heating control valve 411. At this time, the cleaning flow direction of positive pressure spray mode two is as follows: the cleaning fluid in the storage tank 110 enters the cleaning pump 140 through the third pipe 170, and then flows from the second pipe 160 to the second cleaning interface 130 through the cleaning pump 140 and enters the aircraft sewage pipe. After the liquid fills the aircraft's wastewater pipes, it flows out from the first cleaning port 120. Since the first control valve 151 and the second control valve 152 are open, the liquid flowing out from the first cleaning port 120 will enter the liquid storage tank 110 through the pipes on the first control valve 151 and the second control valve 152, thereby filling the pipes. It can be seen that the cleaning fluid of the positive pressure spray mode 2 first enters the aircraft's wastewater pipes from the second cleaning port 130. In this way, the cleaning mode 2 and the positive pressure spray mode 1 can be switched according to different cleaning conditions, making the overall cleaning operation more convenient.

[0020] Furthermore, when a negative pressure cleaning operation is required, the negative pressure cleaning mode can be switched according to the actual situation. Specifically, when using negative pressure cleaning mode one, the corresponding control system opens the first control valve 151, the second control valve 152, the second negative pressure control valve 321, and the heating control valve 411, and closes the third control valve 161, the fourth control valve 171, the positive pressure pump valve 220, the first negative pressure control valve 311, and the third negative pressure control valve 331. At this time, the cleaning flow direction of negative pressure cleaning mode one is: the cleaning pump 140 performs negative pressure operation, and the liquid in the storage tank 110... Under negative pressure, the cleaning fluid flows from the first pipe 150 to the first cleaning port 120 and enters the aircraft wastewater pipe. The liquid flushed out of the wastewater pipe flows out from the second cleaning port 130. Since the second negative pressure control valve 321 is open, the liquid flowing out from the second cleaning port 130 will enter the cleaning pump 140 through the pipe of the second negative pressure control valve 321, and then enter the storage tank 110 through the pipe of the heating control valve 411, thus completing the cyclic cleaning operation of negative pressure cleaning mode one. When negative pressure cleaning mode two is used, the corresponding control... The system opens the first control valve 151, the first negative pressure control valve 311, the third negative pressure control valve 331, and the heating control valve 411, and closes the second control valve 152, the third control valve 161, the fourth control valve 171, the positive pressure pump valve 220, and the second negative pressure control valve 321. At this time, the cleaning flow direction of the negative pressure cleaning mode two is as follows: the cleaning pump 140 operates under negative pressure, and the cleaning fluid in the storage tank 110 flows from the pipelines of the first control valve 151 and the third negative pressure control valve 331 (which are in the open state) to the second cleaning interface 130 and enters the aircraft sewage pipe. The sewage pipe is flushed. The cleaned liquid flows out from the first cleaning port 120 and enters the cleaning pump 140 through the pipeline of the first negative pressure control valve 311 (which is in the open state). Then, through the cleaning pump 140, it enters the storage tank 110 through the pipeline of the heating control valve 411 (which is in the open state), thus completing the cyclic cleaning operation of negative pressure cleaning mode two. It can be seen that the cleaning fluid of negative pressure cleaning mode two first enters the aircraft's sewage pipe from the second cleaning port 130. In this way, the pumping fluid of negative pressure cleaning mode two and negative pressure cleaning mode one can be performed according to different cleaning conditions, so that the dirt in the aircraft's sewage pipe can be better flushed out.

[0021] Furthermore, the heating device 400 also includes a heater 420, which is disposed on the third pipe 170 and positioned between the fourth control valve 171 and the cleaning pump 140. Thus, when liquid passes through the third pipe 170, the temperature of the liquid in the pipe can be increased by the heating operation of the heater 420, thereby enabling the use of warm water for cleaning. This allows the system to adapt to cleaning scenarios with lower temperatures, making the overall cleaning operation more convenient.

[0022] Please refer to it again. Figure 1 The aircraft wastewater pipeline cleaning system 10 also includes a pressurizing device 500, which includes a pressurizing pump 510, a buffer tank 520, and a drain pipe 530. The pressurizing pump 510 is connected to the buffer tank 520 through a first pressurizing pipe 540, and a first pressurizing control valve 541 is installed on the first pressurizing pipe 540. The buffer tank 520 is connected to the liquid storage tank 110 through a second pressurizing pipe 550, and a second pressurizing control valve 551 is installed on the second pressurizing pipe 550. The drain pipe 530 is connected to the buffer tank 520 and the second pipe 160 respectively, and a drain control valve 531 is installed on the drain pipe 530.

[0023] It should be noted that the pressurizing pump 510 is a rotary vane vacuum pump, which features fast pumping speed, small size, light weight, low noise, and convenient maintenance; the buffer tank 520 is a vacuum buffer tank, which can stabilize pressure fluctuations within the overall system and also serve as a vacuum-assisted liquid priming device. Before performing negative pressure cleaning, in order to provide pressure within the negative pressure cleaning pipeline so that the liquid in the storage tank 110 can smoothly enter the aircraft wastewater pipeline, the pressurizing device 500 first performs a pressurization and priming operation. Specifically, the first pressurization control valve 541 is opened, the control valves in the remaining pipelines are closed, and the pressurizing pump 510 performs a vacuuming operation on the buffer tank 520. When the vacuum degree reaches 80-98 kPa, the pressurizing pump 510 stops operating and the first pressurization control valve 541 is closed; after completing the above vacuuming operation, the first control valve 151, the second control valve 152, and the priming control valve 531 are opened, and the control valves in the remaining pipelines are closed. Control valve. At this time, under vacuum, the liquid in the storage tank 110 will enter the aircraft's sewage pipe through the first pipe 150 and the first cleaning port 120. When the aircraft's sewage pipe is full, it will flow out from the second cleaning port 130 and the second pipe 160, and enter the buffer tank 520 through the drain pipe 530. When a small amount of liquid enters the buffer tank 520, it indicates that the overall pipeline drainage is successful, that is, the pressurization operation is completed. After the pressurization operation is completed, the first control valve 151, the second control valve 152 and the drain control valve 531 are closed, and then the negative pressure cleaning operation is performed using negative pressure cleaning mode one or negative pressure cleaning mode two. The aircraft sewage pipeline cleaning system 10 of this utility model can increase the pressure inside the pipeline by setting a pressurizing device 500, so that the negative pressure cleaning mode can be cleaned under sufficient negative pressure intensity. This can avoid the failure of the negative pressure cleaning mode to start due to insufficient pressure, and can adapt to the overall altitude of large aircraft for negative pressure cleaning. There is no need to use lifting equipment to raise the aircraft sewage pipeline cleaning system 10, thereby saving manpower and material resources.

[0024] In one implementation method, please refer again. Figure 1The pressurization device 500 also includes an injector 560, which is connected to the buffer tank 520 through a first injection pipe 570. An injection control valve 571 is provided on the first injection pipe 570.

[0025] It should be noted that the ejector 560 can be a steam ejector. By increasing the connection between the ejector 560 and the buffer tank 520, the negative pressure intensity of the overall system can be further improved. The ejector 560 or the pressure pump 510 can be selected for pressurization operation depending on the cleaning situation. Specifically, when the ejector 560 is selected for pressurization operation, the injection control valve 571 is opened, and the control valves in the remaining pipelines are closed. The ejector 560 performs a vacuum operation on the buffer tank 520. When the vacuum degree reaches 80-98 kPa, the ejector 560 stops operating, and the injection control valve 561 is closed. After completing the above vacuum operation... Open the first control valve 151, the second control valve 152, and the drainage control valve 531, and close the control valves in the remaining pipelines. At this time, under vacuum, the liquid in the storage tank 110 will enter the aircraft's sewage pipeline through the first pipeline 150 and the first cleaning port 120. When the aircraft's sewage pipeline is full, it will flow out from the second cleaning port 130 and the second pipeline 160, and enter the buffer tank 520 through the drainage pipe 530. When a small amount of liquid enters the buffer tank 520, it indicates that the overall pipeline drainage is successful, that is, the pressurization operation is completed. Therefore, negative pressure cleaning mode one or negative pressure cleaning mode two can be used for negative pressure cleaning operation. The pressurization device 500 of this utility model, by setting the ejector 560, can select the corresponding pressurization mode according to different cleaning conditions, thereby making the overall cleaning operation more adaptable.

[0026] In one embodiment, the first control valve, the second control valve, the third control valve, the fourth control valve, the first negative pressure control valve, the second negative pressure control valve, the third negative pressure control valve, the first pressurization control valve, the second pressurization control valve, the drainage control valve, the heating control valve, the positive pressure pump valve, and the jet control valve are all solenoid valves. In this way, an automated numerical control system can be used to electrically control each valve, thereby enabling the switching of each cleaning and pressurization mode in a short time.

[0027] This utility model's aircraft wastewater pipeline cleaning system incorporates a cleaning device, a positive pressure pump, a negative pressure pump, and a heating device. An automated numerical control system electrically controls each valve, allowing for rapid switching between positive and negative pressure pumping modes, thus improving overall cleaning efficiency. Furthermore, the system can switch between positive and negative pressure pumping modes to adapt to different cleaning scenarios, making the overall cleaning operation more effective and convenient.

[0028] In one embodiment, a cleaning agent 111 is provided in the storage tank 110, thereby improving the overall cleaning capability of the system. Furthermore, the cleaning agent has a pH value close to 7 (existing cleaning agents used for cleaning aircraft sewage pipes typically maintain a pH value between 2.0 and 4.0; acidity within this range can effectively dissolve inorganic scale), making it suitable for cleaning various materials and significantly reducing corrosion to aircraft sewage pipes. This invention also provides an aircraft sewage pipe cleaning system using the aforementioned cleaning agent. This system enables the circulating cleaning of sewage pipes using the cleaning agent. Through the synergistic effect of the cleaning agent and the aircraft sewage vacuum pipe cleaning equipment, the cleaning effect on aircraft sewage pipes can be significantly improved.

[0029] To achieve the above objectives, the present invention adopts the following technical solution: a cleaning agent, wherein the cleaning agent uses deionized water as the main solvent.

[0030] Based on the total mass of the cleaning agent, the cleaning agent comprises:

[0031] 5wt%-12wt% organic acids;

[0032] 2wt%-5wt% corrosion inhibitor;

[0033] 0.3wt%-3wt% surfactant;

[0034] Thickener of 0.2wt%-1wt%.

[0035] The organic acid comprises a combination of S-(2,3,4-trihydroxybutyl) mercapto acid and hydroxyethylidene diphosphonic acid, which exhibits excellent scale-dissolving properties while causing minimal damage to aircraft wastewater pipes. Preferably, the mass ratio of S-(2,3,4-trihydroxybutyl) mercapto acid to hydroxyethylidene diphosphonic acid is 1:1-3.

[0036] In one or more embodiments, for the purpose of further improving the scale-dissolving effect of the cleaning agent, the organic acid further includes one or more of succinic acid, citric acid, lactic acid, oxalic acid, benzenesulfonic acid, tartaric acid, malic acid, maleic acid, glycolic acid, and aminosulfonic acid.

[0037] The corrosion inhibitor comprises a combination of glycine and aminotrimethylenephosphonic acid. Preferably, the mass ratio of glycine to aminotrimethylenephosphonic acid is 1:1-4. In one or more embodiments, the corrosion inhibitor further comprises one or more of benzotriazole, methylbenzotriazole, imidazoline quaternary ammonium salt, pyridine carboxylic acid, tributyl phosphate, polyphosphate, dodecylamine, polyethyleneimine, thiourea, hexamethylenetetramine, sodium benzoate, sodium nitrite, sodium chromate, sodium molybdate, and sodium silicate.

[0038] Surfactants increase the wettability of cleaning agents on solid surfaces, allowing for better contact and cleaning. It has been unexpectedly found that when the surfactant includes alkylbenzene sulfonic acid (or alkylbenzene sulfonate), it significantly improves the stability of the cleaning agent during high-temperature storage. Preferably, the alkylbenzene sulfonic acid includes one or more of dodecylbenzene sulfonic acid, decaalkylbenzene sulfonic acid, tetradecylbenzene sulfonic acid, hexadecylbenzene sulfonic acid, bis(dodecylbenzene sulfonic acid), bis(decylbenzene sulfonic acid), bis(tetradecylbenzene sulfonic acid), and bis(hexadecylbenzene sulfonic acid).

[0039] Thickeners increase the viscosity of cleaning agents, allowing them to adhere better to surfaces during use and thus improving cleaning effectiveness. It was unexpectedly discovered that when the thickener includes carboxymethyl cellulose (CMC) and xanthan gum (i.e., xanthan gum), it significantly improves the stability of the cleaning agent during low-temperature storage, preventing stratification and sedimentation and ensuring the uniformity of the cleaning agent. Preferably, the mass ratio of carboxymethyl cellulose to xanthan gum is 1:1-4.

[0040] In one or more embodiments, for the purpose of imparting a bactericidal effect to the cleaning agent, the cleaning agent further includes an antibacterial agent. Based on the total mass of the cleaning agent, the content of the antibacterial agent is 3wt%-7wt%, within which range, which can reduce bacterial growth in sewage pipes and reduce biofouling in the pipes. It has been unexpectedly found that when the antibacterial agent includes one or more of chitosan, chitosan quaternary ammonium salt, chitosan hydrochloride, hydroxypropyl chitosan, dodecyltrimethylammonium chloride, dodecyldimethylammonium bromide, trimethyltetradecylammonium chloride, trimethyltetradecylammonium bromide, hexadecyltrimethylammonium chloride, and hexadecyltrimethylammonium bromide, it also has adsorption and flocculation effects, which help remove organic fouling.

[0041] To reduce the risk of chemical burns, the cleaning agent provided by this invention has a pH value of 6 or higher at 25°C, preferably 6.2 or higher, and more preferably 6.5 or higher. It should be noted that the pH value can be obtained using a pH meter.

[0042] To improve the stability and workability of the cleaning agent, the content of deionized water in the cleaning agent (based on the total mass of the cleaning agent) is preferably 70 wt% or more.

[0043] The cleaning agent of this invention can be formulated with emulsifiers, enzymes (protein-degrading enzymes, fat-degrading enzymes, sugar-degrading enzymes, etc.), solvents, water-soluble additives, dispersants, pH adjusters, thickeners, viscosity modifiers, fragrances, colorants, antioxidants, preservatives, defoamers, bleaching agents, bleaching activators, and antifoaming agents, etc., within a range that does not impair the purpose of this invention.

[0044] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0045] This invention provides a cleaning agent for cleaning sewage pipes in aircraft. The cleaning agent has strong dissolving power and fast speed, and has a significant effect on removing insoluble inorganic salts. Through the combination of S-(2,3,4-trihydroxybutyl) mercaptoic acid and hydroxyethylidene diphosphonic acid, the corrosiveness of the cleaning agent to the pipe can be reduced. On the other hand, this combination, in conjunction with surfactants and corrosion inhibitors, has good penetration and detergency, and can effectively remove complex pipe dirt. It has the characteristics of strong detergency, high cleaning efficiency and low irritation.

[0046] Further: The specific component parameters of the cleaning agents provided in Examples 1-3 are shown in Table 1. The specific component parameters of the cleaning agents provided in Comparative Examples 1-5 are shown in Table 2. The specific component parameters of the cleaning agents provided in Comparative Examples 6-10 are shown in Table 3.

[0047] Table 1

[0048]

[0049]

[0050] The preparation methods of the cleaning agents provided in Examples 1-3 and Comparative Examples 1-10 both include the following steps:

[0051] Step 1: Mix the thickener and some deionized water evenly to obtain mixed raw material A;

[0052] Step 2: Mix the surfactant and some deionized water until homogeneous to obtain mixed raw material B;

[0053] Step 3: Mix the organic acid, corrosion inhibitor and some deionized water evenly to obtain mixed raw material C;

[0054] Step four: Add mixed raw material A and mixed raw material B into mixed raw material C in sequence, stir evenly, then add antibacterial agent and the remaining deionized water, stir evenly to obtain cleaning agent.

[0055] Table 2

[0056]

[0057]

[0058] Table 3

[0059]

[0060]

[0061] The cleaning agents provided in Examples 1-3 and Comparative Examples 1-10 were tested as follows:

[0062] (a) Storage stability test: The test shall be conducted in accordance with the requirements of ASTM F 1104. The cleaning agent shall be stored at -8℃±2℃ for 15 days and then at 49℃±10℃ for 15 days. The cleaning agent shall not show any precipitation or stratification and shall be able to return to its original state. If the test is qualified, it shall be marked with "○"; if the test is unqualified, it shall be marked with "×".

[0063] (b) Intergranular corrosion test: The test shall be conducted in accordance with the requirements of ASTM F 2111. The aluminum alloy shall be immersed in the cleaning agent for 30 minutes. The aluminum alloy shall not have intergranular corrosion exceeding 5.1 μm or grain end pitting exceeding 25.4 μm. If the test is qualified, it shall be marked with "○"; if the test is unqualified, it shall be marked with "×".

[0064] (c) Full Immersion Corrosion Test: The test shall be conducted according to the requirements of ASTM F 483. Aluminum alloy specimens conforming to the standard shall be immersed in a cleaning agent at 38℃±2℃ for 24 hours. The cleaning agent should not cause significant corrosion to the specimens, and the change in mass of the specimens should not exceed 0.3 mg / cm³. 2 If the test passes, mark it with "○"; if the test fails, mark it with "×".

[0065] (d) Intercalation corrosion test: The test shall be conducted in accordance with the requirements of ASTM F 1110, using aluminum alloy specimens that meet the standard requirements. The corrosion of the specimens by the cleaning agent shall not exceed that of the ASTM D 1193 IV water control plate. If the test is qualified, it shall be marked with "○"; if the test is unqualified, it shall be marked with "×".

[0066] (e) Effects on Transparent Plastics Test: The test shall be conducted according to ASTM F484, and shall simultaneously meet the following requirements: Under external stress of 4500 psi for 8 hours, the cleaning agent shall not cause silver streaks or discoloration on polypropylene specimens conforming to MIL-P-25690; Under external stress of 2000 psi for 30 min ± 2 min, the cleaning agent shall not cause silver streaks or discoloration on polycarbonate specimens conforming to AMS-P-83310. A "○" is marked if the test is passed, and a "×" is marked if the test fails.

[0067] (f) Effect on painted surfaces test: The test shall be conducted in accordance with ASTM F 502. The cleaning agent shall not reduce the hardness of the paint film by more than two pencil hardnesses, nor shall it cause fading, discoloration, or blistering. If the test is passed, mark it with “○”; if the test is failed, mark it with “×”.

[0068] (g) Effect on unpainted surfaces: The test shall be conducted in accordance with ASTM F 485. The cleaning agent shall not leave stains on the aluminum alloy specimen surface that require polishing to remove. If the test is passed, mark it with “○”; if the test is failed, mark it with “×”.

[0069] (h) Effects on rubber and plastics: Test according to ASTM D 471. At room temperature, after 30 days in a cleaning agent, the tensile strength of rubber should not decrease by more than 25%, the elongation at break should not decrease by more than 25%, the volume change should not exceed ±15%, and the rubber and plastics should not be contaminated, discolored, or degraded. If the test is passed, mark it with “○”; if the test fails, mark it with “×”.

[0070] (i) Impact Test on Cleaning Effect: The cleaning agent of this utility model is cleaned using the positive and negative pressure circulation cleaning method of the aircraft sewage pipeline cleaning system provided by this utility model. The cleaning method is as follows: The cleaning agent is added to the storage tank 110 of the aircraft sewage pipeline cleaning system. The first cleaning interface 120 and the second cleaning interface 130 of the aircraft sewage pipeline cleaning system are connected to the sewage outlet of the aircraft sewage pipeline, so that the aircraft sewage pipeline cleaning system and the sewage pipeline form a connected loop system. The cleaning agent is drawn from the storage tank 110 into the loop system to form a backflow, and negative pressure positive / reverse cleaning is performed. After cleaning for 1 hour, the cleaning effect of the sewage pipeline is evaluated: "Excellent" is defined as basically cleaning the dirt and exposing more than 95% of the metal substrate area; "Good" is defined as most of the dirt is cleaned and 70-85% of the metal substrate area is exposed; "Medium" is defined as partially cleaning the dirt and exposing 15-70% of the metal substrate area; and "Poor" is defined as dirt not being cleaned at all and exposing less than 15% of the metal substrate area.

[0071] The test results are shown in Table 4. Based on the experimental results in Table 4, it can be determined that the cleaning agent provided by this invention has excellent stability and can be stored for a long time over a wide temperature range. Furthermore, the cleaning agent provided by this invention has low corrosiveness and can be applied to cleaning various material surfaces while maintaining excellent cleaning performance. This is a result of the direct synergistic effect of the various components.

[0072] Furthermore, the effects of this utility model are not limited to those described herein.

[0073] Table 4

[0074]

[0075] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An aircraft wastewater pipeline cleaning system, characterized in that, include: A cleaning device includes a liquid storage tank, a first cleaning interface, a second cleaning interface, and a cleaning pump. The first cleaning interface is connected to the liquid storage tank through a first pipe. A first control valve and a second control valve are respectively installed on the first pipe. The second cleaning interface is connected to the cleaning pump through a second pipe. A third control valve is installed on the second pipe. The cleaning pump is connected to the liquid storage tank through a third pipe. A fourth control valve is installed on the third pipe. A positive pressure pumping device, comprising a positive pressure pumping pipeline and a positive pressure pumping valve, wherein the positive pressure pumping pipeline is connected to the first pipeline and the second pipeline respectively, and the positive pressure pumping valve is disposed on the positive pressure pumping pipeline; A negative pressure pumping device includes a first negative pressure pipe, a second negative pressure pipe, and a third negative pressure pipe. The first negative pressure pipe is connected to the third pipe and the positive pressure pumping pipe, and a first negative pressure control valve is installed on the first negative pressure pipe. The second negative pressure pipe is connected to the third pipe and the second pipe, and a second negative pressure control valve is installed on the second negative pressure pipe. The third negative pressure pipe is connected to the second negative pressure pipe and the first pipe, and the connection end of the third negative pressure pipe to the first pipe is located between the first control valve and the second control valve. A third negative pressure control valve is installed on the third negative pressure pipe. A pressurizing device includes a pressurizing pump, a buffer tank, and a drain pipe. The pressurizing pump is connected to the buffer tank via a first pressurizing pipe, and a first pressurizing control valve is installed on the first pressurizing pipe. The buffer tank is connected to the liquid storage tank via a second pressurizing pipe, and a second pressurizing control valve is installed on the second pressurizing pipe. The drain pipe is connected to both the buffer tank and the second pipe, and a drain control valve is installed on the drain pipe.

2. The aircraft wastewater pipeline cleaning system according to claim 1, characterized in that, It also includes a heating device, which includes a heating pipe that is connected to the liquid storage tank and the second pipe, and a heating control valve is provided on the heating pipe.

3. The aircraft wastewater pipeline cleaning system according to claim 2, characterized in that, The heating device further includes a heater, which is disposed on the third pipe.

4. The aircraft wastewater pipeline cleaning system according to claim 3, characterized in that, The heater is located between the fourth control valve and the cleaning pump.

5. The aircraft wastewater pipeline cleaning system according to claim 1, characterized in that, The pressurization device also includes an injector, which is connected to the buffer tank via a first injection pipe, and an injection control valve is provided on the first injection pipe.

6. The aircraft wastewater pipeline cleaning system according to claim 1, characterized in that, The first control valve, the second control valve, the third control valve, the fourth control valve, the first negative pressure control valve, the second negative pressure control valve, the third negative pressure control valve, the first pressurization control valve, the second pressurization control valve, and the drainage control valve are all solenoid valves.

7. The aircraft wastewater pipeline cleaning system according to any one of claims 1-6, characterized in that, The storage tank contains a cleaning agent.

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