Preparation method of composite cleaning agent for electrified insulation equipment

Abstract

The invention relates to the technical field of preparation of composite cleaning agents, in particular to a preparation method of a composite cleaning agent for electrified insulation equipment. Carrying out composite reaction; deep purification; packaging, simulating and storing; the material preparation pretreatment comprises the steps of base material preparation, main material preparation, auxiliary material preparation, equipment preparation and raw material treatment, and the composite reaction comprises the steps of weighing and proportioning, mixed reaction, condition regulation and control and sensitivity monitoring. In combination with the dissolution effect of the insulating solvent, the decontamination rate of 95% or above can be achieved; a protective film can be formed on the surface of an equipment metal part to inhibit electrochemical corrosion; the raw material utilization rate is improved; after caking, the surfactant is dried and crushed at a specific temperature, so that the original performance can be recovered, and the characteristics of different raw materials can be adapted; and the stirring kettle with explosion-proof and insulating properties is adopted, so that the safety risk possibly caused by friction, static electricity and the like in the mixing process is reduced from the source of equipment.

Description

Technical Field

[0001] This invention relates to the field of composite cleaning agent preparation technology, and in particular to a method for preparing a composite cleaning agent for electrically insulating equipment. Background Technology

[0002] During long-term continuous operation, electrical equipment is commonly contaminated by various dust, metal salts, oil, and other pollutants floating in the air. This contamination reduces the equipment's capabilities and affects its operational quality and reliability. The presence of a corresponding electromagnetic field during normal operation of electrical equipment, along with the accumulation of static electricity due to prolonged friction in the ventilation system, are the two main causes of "soft failures" in the equipment.

[0003] Under current conditions, high-voltage live-line cleaning agents can be used by spraying, soaking, or brushing. For spraying, a special spray gun is used to draw in the cleaning agent; for equipment with particularly severe dirt, repeated spraying is necessary. For example, CN110628524B discloses a composite cleaning agent for live-line insulating equipment. This agent uses a composition of benzenesulfonic acid imidazolium salt and fatty alcohol polyoxyethylene ether, which has good emulsifying and penetrating abilities and antistatic capabilities, resulting in strong cleaning power and easy volatilization after cleaning. The addition of specific antistatic and flame-retardant components gives it a high flash point and strong antistatic ability, preventing flashover. Fire hazards can be avoided during or after cleaning. However, the internal conditions of electrical equipment are complex. As a liquid, the cleaning agent has extremely high fluidity within the equipment. Without appropriate protective measures, it can easily come into contact with conductive structures and become conductive, causing varying degrees of impedance reduction, leakage, short circuits, and other obstacles, disrupting the normal operation of the electrical equipment. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that composite cleaning agents in the prior art are difficult to use for insulating cleaning of electrically insulating equipment, and to propose a method for preparing a composite cleaning agent for electrically insulating equipment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for preparing a composite cleaning agent for electrically insulating equipment, the method comprising the following steps:

[0007] Step S1, material preparation and pretreatment;

[0008] Step S2, complex reaction;

[0009] Step S3, deep purification;

[0010] Step S4: Simulate storage of the package;

[0011] Step S5, quality inspection and evaluation.

[0012] Preferably, step S1, material preparation pretreatment includes base material preparation, main material preparation, auxiliary material preparation, equipment preparation and raw material processing;

[0013] Step S2, the composite reaction includes weighing and proportioning, mixing reaction, condition control and sensitivity monitoring;

[0014] Step S3, deep purification includes distillation to remove impurities, molecular-level dehydration, and anti-oxidation protection;

[0015] Step S4, packaging simulation storage, includes packaging material selection, safety protection, packaging sealing and storage protection;

[0016] Step S5, the quality inspection and evaluation includes performance testing, scenario testing and security testing.

[0017] Preferably, the preparation of the base material refers to the preparation of a high-purity insulating solvent;

[0018] The preparation of the main materials refers to the preparation of detergents, insulation enhancers, and corrosion inhibitors;

[0019] The preparation of excipients refers to the preparation of pH adjuster, defoamer, and fragrance;

[0020] The equipment preparation refers to preparing an explosion-proof mixing tank, insulation testing instruments, electronic scales, pH meters, and thermometers;

[0021] The raw material processing refers to the pretreatment of base materials, main materials, and auxiliary materials to remove impurities and adjust their state to ensure that they meet the preparation requirements.

[0022] Preferably, the weighing ratio refers to accurately weighing the base material, main material and auxiliary material according to the predetermined formula in step S1 material preparation and pretreatment to ensure that the proportion of each component is correct;

[0023] The mixing reaction refers to adding the weighed base material, main material and auxiliary material into the reaction vessel in a specific order and stirring to promote physical or chemical reactions between the components.

[0024] The aforementioned condition control refers to the precise control of reaction temperature, pressure, and time conditions to provide a suitable environment for the complex reaction, ensuring a complete reaction and stable product performance;

[0025] The sensitivity monitoring refers to the periodic monitoring of the key performance indicators of the cleaning agent during the reaction process, so as to promptly detect and correct deviations.

[0026] Preferably, the distillation for impurity removal refers to removing residual low-boiling-point impurities and high-boiling-point residues from the cleaning agent through distillation separation, thereby improving purity;

[0027] The molecular-level dehydration refers to the use of adsorption dehydration or molecular-level membrane separation technology to reduce the water content in the cleaning agent, so as to avoid water affecting the insulation performance.

[0028] The aforementioned anti-oxidation protection refers to inhibiting the oxidative degradation of easily oxidized components in the cleaning agent through physical or chemical means, thereby extending the product's shelf life.

[0029] Preferably, the packaging material selection refers to selecting packaging materials that need to take into account sealing, corrosion resistance, insulation and safety, to prevent the cleaning agent from leaking, deteriorating or affecting its performance;

[0030] The aforementioned safety protection refers to reducing risks during the packaging process by focusing on three aspects: personnel operation safety, packaging labeling, and emergency protection.

[0031] The packaging and sealing process refers to ensuring that the cleaning agent remains stable within the packaging through standardized filling and sealing procedures, thereby reducing the impact of the external environment.

[0032] The aforementioned storage protection refers to conducting stability tests simulating actual storage environments and establishing strict storage management standards to ensure the performance of the cleaning agent.

[0033] Preferably, the performance test refers to the precise detection of the core functional indicators of the cleaning agent to verify whether it meets the basic requirements for live cleaning.

[0034] The scenario test refers to simulating actual live cleaning scenarios to verify the applicability of the cleaning agent under different equipment and working conditions, and to ensure that it can play an effective role without damaging the equipment.

[0035] The safety test refers to the inspection from three aspects: fire safety, personnel safety, and environmental safety, to ensure that the cleaning agent has no safety hazards during storage, transportation, and use.

[0036] Preferably, the staged sensitivity monitoring refers to manual observation data collection every 1.25-1.5 hours.

[0037] Preferably, the product shelf life in the anti-oxidation protection is required to be ≥16 months.

[0038] Preferably, the core functional indicators of the cleaning agent in the performance test include insulation performance, decontamination ability, and stability.

[0039] Compared with the prior art, the present invention has the following advantages:

[0040] 1. This invention uses a high-purity insulating solvent as a base material, which itself possesses excellent insulating properties. Its purity is ≥99.5% and moisture content is ≤0.1%, providing a good insulating foundation for the cleaning agent and meeting the cleaning needs of 10kV to 110kV and above live equipment. This avoids safety accidents such as short circuits and flashovers caused by insufficient insulation performance. The detergent can quickly penetrate and emulsify mixed stains such as oil, dust, and metal oxides on the surface of the equipment. Combined with the dissolving effect of the insulating solvent, a cleaning rate of over 95% can be achieved. It can form a protective film on the surface of the metal parts of the equipment, inhibiting electrochemical corrosion. Tests show that the mass change rate of the material after immersion for 72 hours is ≤1%, effectively avoiding damage to the metal parts during the cleaning process. The defoamer can quickly eliminate the foam generated during the cleaning process, avoiding foam residue that affects the insulation performance or causes poor heat dissipation of the equipment. Moreover, there is no secondary foaming within 5 minutes after defoaming.

[0041] 2. This invention can increase the specific surface area, ensuring sufficient subsequent dissolution and improving raw material utilization; after the surfactant clumps, it can be dried and broken up at a specific temperature to restore its original properties, avoiding the impact of morphological problems on the use effect; through 3A molecular sieve or distillation dehydration, moisture can be effectively removed to ensure the purity of the raw materials, and immediate sealing after dehydration can prevent secondary moisture absorption and maintain the stability of raw material quality; targeted treatment methods are adopted for raw materials in different states (solid and liquid), and the operation process is clear, which can reduce human operation error, ensure the consistency of raw material processing quality, and provide a guarantee for the stable operation of subsequent production processes.

[0042] 3. This invention adapts to the characteristics of different raw materials by adjusting the stirring speed in stages and using targeted stirring time. It employs an explosion-proof and insulating stirring vessel, reducing safety risks caused by friction and static electricity during mixing from the equipment source, making it particularly suitable for mixing scenarios involving multiple chemical raw materials. Raw materials are added sequentially according to their function and characteristics, with reasonable stirring times set for each material to ensure that each component functions fully in sequence, reducing interference between components and improving the stability and functionality of the final product. By gradually increasing the stirring speed and scientifically allocating the stirring time, it ensures thorough mixing of all raw materials while avoiding ineffective energy consumption, balancing mixing efficiency and product quality, and laying a solid foundation for subsequent production stages. Attached Figure Description

[0043] Figure 1 This is a schematic diagram illustrating the steps of a method for preparing a composite cleaning agent for electrically insulating equipment proposed in this invention;

[0044] Figure 2 This is a schematic diagram of step S1 of the preparation method of the composite cleaning agent for electrically insulating equipment proposed in this invention, showing the material preparation and pretreatment process.

[0045] Figure 3This is step S2 of the preparation method of the composite cleaning agent for electrically insulating equipment proposed in this invention, and a schematic diagram of the composite reaction process;

[0046] Figure 4 This is a schematic diagram of step S3, the deep purification process, in the preparation method of the composite cleaning agent for electrically insulating equipment proposed in this invention.

[0047] Figure 5 This is a schematic diagram of step S4, packaging and storage process, of the preparation method of the composite cleaning agent for electrically insulating equipment proposed in this invention.

[0048] Figure 6 This is a schematic diagram of step S5, the quality inspection and evaluation process, in the preparation method of the composite cleaning agent for electrically insulating equipment proposed in this invention. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0050] Reference Figures 1-6 A method for preparing a composite cleaning agent for electrically insulating equipment, comprising the following steps: Step S1, material preparation and pretreatment; Step S2, composite reaction; Step S3, deep purification; Step S4, packaging and simulated storage; Step S5, quality inspection and evaluation.

[0051] Step S1, material preparation and pretreatment, includes base material preparation, main material preparation, auxiliary material preparation, equipment preparation, and raw material processing. Specific details are as follows:

[0052] Base material preparation refers to preparing high-purity insulating solvents. The base material is the basic carrier of the cleaning agent and must have good insulation, chemical stability, and compatibility with other components. Isopropanol, dichloromethane-modified solvents, and alkylbenzene solvents are preferred. It should be noted that when purchasing the above solvents, the supplier is required to provide a component testing report. The report must clearly indicate the purity ≥99.5%, moisture ≤0.1%, and dielectric constant. At the same time, the base material needs to be pre-filtered: use a 5μm precision filter membrane to remove particulate impurities to avoid affecting the insulation performance. More importantly, different batches of base material need to undergo small-scale compatibility testing first. After mixing, observe whether there is stratification or precipitation to avoid formula failure due to purity differences.

[0053] The preparation of main materials refers to the preparation of detergents, insulation enhancers, and corrosion inhibitors. Detergents are used to remove oil and dust, insulation enhancers are used to improve dielectric properties, and corrosion inhibitors are used to protect the metal parts of the equipment. It is important to note that:

[0054] For detergents, nonionic surfactants are preferred, such as fatty alcohol polyoxyethylene ethers, or anionic surfactants, such as sodium alkyl sulfonate, are preferred. The amount used should account for 5%-15% of the total formula and should meet the characteristics of low foaming and easy rinsing.

[0055] Insulation reinforcing agents, by adding siloxane derivatives or fluorocarbon compounds at a dosage of 2%-5%, improve the volume resistivity of the cleaning agent, but a value ≥1×10⁻⁶ is required. 14 Ω·cm.

[0056] Corrosion inhibitors must be selected based on the materials of copper and aluminum equipment. Benzotriazole or mercaptobenzothiazole should be used, with a dosage of 0.5%-2%. They must pass a salt spray test and show no corrosion after 48 hours to meet the usage standards. However, it is important to strictly control the dosage: excessive dosage may reduce the cleaning ability, while insufficient dosage will not inhibit corrosion. The dosage must be verified by a dip test, which involves immersing a metal sample of the equipment for 72 hours and observing whether rust spots or discoloration appear.

[0057] All main ingredients must be accurately weighed according to the formula ratio, using an electronic balance, and the amount used for each batch must be recorded.

[0058] The preparation of auxiliary materials refers to the preparation of pH adjusters, defoamers, and fragrances. These auxiliary materials are used to optimize the stability, safety, and user experience of the cleaning agent. pH adjusters control the acidity or alkalinity, defoamers reduce the impact of foam on electrical operations, and fragrances, as optional, are used to enhance the sensory experience. It is worth noting that:

[0059] Use citric acid or triethanolamine as a pH adjuster to adjust the pH of the cleaning agent to 6-8 to avoid corrosion of the equipment's insulation layer.

[0060] When selecting a defoamer, add an organosilicone defoamer, preferably polydimethylsiloxane, at a dosage of 0.1%-1%. Verify the effectiveness by shaking the bottle; if the foam disappears within 5 minutes after shaking, it is usable. However, the defoamer should not be used in excess, otherwise it may reduce the adhesion of the cleaning agent and affect the cleaning effect.

[0061] Equipment preparation refers to preparing an explosion-proof mixing tank, insulation testing instruments, an electronic scale, a pH meter, and a thermometer. The volume of the explosion-proof mixing tank should be selected according to the production capacity, and it must have variable frequency speed control function, with a speed of 0-1500 r / min. Insulation testing instruments include a dielectric loss meter and a megohmmeter. Before using the equipment, pretreatment and protection are required. The mixing tank and pipelines should be rinsed three times with a base material to remove residual impurities; check that the grounding of the above equipment is good, ensuring that the grounding resistance is ≤4Ω to prevent static electricity accumulation.

[0062] Raw material processing refers to the pretreatment of base materials, main materials, and auxiliary materials to remove impurities and adjust their state to ensure they meet preparation requirements. It is important to note that when processing solid raw materials, taking corrosion inhibitors as an example, they must be pulverized through an 80-mesh sieve to ensure complete dissolution. If surfactants clump, they must be dried in an oven at 40-50℃ and then crushed. When pulverizing solid raw materials, a dust mask must be worn to avoid inhalation. Liquid raw materials require dehydration using a molecular sieve dehydration device, preferably a 3A molecular sieve, or distillation purification. Dehydrated raw materials must be sealed immediately to prevent re-absorption of moisture. Distillation operations must be carried out in a fume hood to avoid exceeding solvent vapor concentration limits.

[0063] Six sets of comparative experiments showed that:

[0064] Test number Base material percentage (%) Main ingredient percentage (%) Excipient percentage (%) 1 40 45 15 2 50 35 15 3 60 25 15 4 70 15 15 5 60 30 10 6 60 20 20

[0065] It was learned that:

[0066] Experiments 1-4 show that as the base material content increases from 40% to 70%, the insulation performance (volume resistivity) gradually improves. This is because the base material is fundamental to ensuring insulation; a higher content results in better insulation. However, the decontamination rate decreases. When the base material content reaches 70%, the decontamination rate drops to 90%, possibly due to a reduction in the proportion of decontamination components in the main material. At a base material content of 40%, slight stratification occurs, while stability is better at 50% and above, indicating that a low base material content may affect system stability. In summary, a base material content of 50%-70% is suitable, ensuring both good insulation performance and stability while maintaining a certain decontamination rate.

[0067] In experiments 3, 5, and 6, the base material ratio was fixed at 60%, while the main material ratio increased from 20% to 30%. The decontamination rate initially increased and then decreased, reaching 95% at 25%, 94% at 20%, and 97% at 30%. This indicates that increasing the amount of decontamination-related functional components in the main material helps improve the decontamination rate, but higher is not always better. Furthermore, an excessively high main material ratio (e.g., 45% in experiment 1) leads to decreased insulation performance, while an excessively low ratio (e.g., 15% in experiment 4) results in poor decontamination. Therefore, a main material ratio of 25%-35% is more suitable.

[0068] When the proportion of excipients is 10%-20%, in tests 3, 5, and 6, the performance is relatively balanced at 15%, and slight turbidity occurs at 20%, which may be due to excessive excipients affecting the stability of the system. The decontamination rate is slightly lower at 10% than at 15%, indicating that excipients can play a good role at around 15%, and too high or too low a proportion may have an adverse effect on performance.

[0069] In summary, when the base material accounts for 50%-70%, the main material accounts for 25%-35%, and the auxiliary material accounts for about 15%, the prepared composite cleaning agent for electrically insulating equipment can achieve a good balance in terms of insulation performance, decontamination rate, and stability.

[0070] Therefore, the above treatment methods can ensure the purity of raw materials, the compliance of equipment, and the compatibility of components, laying the foundation for the subsequent mixing, reaction, and quality inspection of composite cleaning agents, and ultimately ensuring the insulation performance, decontamination effect, and safety of the product.

[0071] Step S2, the complex reaction includes weighing and proportioning, mixing, condition control, and sensitivity monitoring. Specific details are as follows:

[0072] Weighing and proportioning refers to accurately weighing the base material, main material, and auxiliary material according to the predetermined formula in step S1, ensuring that the proportions of each component are correct. The specific operation is as follows:

[0073] a) Using an electronic balance with an accuracy of 0.01g, weigh the base material (e.g., 60% high-purity insulating solvent), detergent (8% fatty alcohol polyoxyethylene ether), insulation reinforcing agent (3% siloxane derivative), corrosion inhibitor (1% benzotriazole), pH adjuster, defoamer, and fragrance.

[0074] b) Place each weighed ingredient into a clean, dry, and labeled container to avoid mixing them up.

[0075] c) For liquid raw materials, graduated pipettes or graduated cylinders can be used to assist in measurement to ensure volume accuracy.

[0076] It should be noted that different batches of raw materials may vary in purity and density, and each batch must be weighed again strictly according to the formula; historical data should not be used.

[0077] A mixing reaction refers to adding weighed base materials, main materials, and auxiliary materials to a reaction vessel in a specific order and stirring them together to promote physical or chemical reactions between the components. The specific operation is as follows:

[0078] 1) First, add the base material to a mixing tank with explosion-proof and insulating properties, turn on the stirring device, and adjust the speed to 100-200 r / min.

[0079] 2) Slowly add the detergent while stirring for 15-20 minutes to ensure that the detergent is fully dispersed in the base material.

[0080] 3) Next, add the insulation reinforcing agent, increase the rotation speed to 300-400 r / min, and stir for 30-40 min to ensure that the insulation reinforcing agent is fully integrated with the system.

[0081] 4) Add corrosion inhibitor and maintain the stirring speed for 20-30 minutes.

[0082] 5) Add pH adjuster, defoamer, and flavoring additives in sequence, stirring for 5-10 minutes after each additive is added.

[0083] 6) After all raw materials have been added, adjust the speed to 500-600 r / min and stir for 60-90 min to ensure the system is fully mixed.

[0084] Condition control refers to the precise control of reaction temperature, pressure, and time to provide a suitable environment for the complex reaction, ensuring sufficient reaction and stable product performance. It should be noted that the reaction temperature is maintained at 25-35℃ through the circulating heat transfer system of the jacketed reactor, and can be fine-tuned during the process according to the formula and reaction characteristics, monitored in real time using a thermometer with an accuracy of ±0.5℃. A pressure regulating valve is used to control the pressure at 0.1-0.3MPa to prevent excessive pressure from causing safety accidents or affecting the reaction process. The total reaction time, from the start of stirring and mixing, is controlled at 180-240 minutes to ensure that all components react and fuse fully.

[0085] Sensitivity monitoring refers to the periodic monitoring of key performance indicators of the cleaning agent during the reaction process to promptly identify and correct deviations. It is important to note that:

[0086] Insulation monitoring: Every 30 minutes, use a dielectric loss meter and megohmmeter to measure the dielectric constant, volume resistivity, and other insulation parameters of the cleaning agent sample to ensure that the dielectric constant is within a specific range and the volume resistivity is ≥1×10⁻⁶. 14 Ω·cm.

[0087] pH monitoring: Measure the pH value of the cleaning agent every 20 minutes with a precision pH meter to maintain it in the neutral range of 6-8. If it deviates from the range, add pH adjuster to fine-tune it.

[0088] Stability monitoring: Take a small amount of cleaning agent sample in a transparent container and observe whether stratification or precipitation occurs. Observe once an hour. Alternatively, centrifugation test (3000r / min, centrifuge for 10min) can be used to accelerate the detection. If precipitation occurs, the formula or mixing process needs to be adjusted.

[0089] Step S3, deep purification, includes distillation to remove impurities, molecular-level dehydration, and antioxidant protection. Specific details are as follows:

[0090] Distillation for impurity removal refers to the process of separating and removing residual low-boiling-point impurities and high-boiling-point residues from cleaning agents through distillation, thereby improving purity. The specific operation involves pumping the cleaning agent after the composite reaction into a vacuum distillation apparatus, setting the vacuum level to 0.08-0.1 MPa. Based on the differences in boiling points of the components in the system, the distillation temperature is controlled in stages: first, distill at 50-60℃ for 1-2 hours to remove low-boiling-point impurities; then, raise the temperature to 90-100℃ and distill for 2-3 hours to separate high-boiling-point residues; collect the middle fraction as the purified base liquid; discard the initial distillate and the residue at the bottom of the vessel. It is important to note that the distillation apparatus must be explosion-proof, the glass components must be made of high-temperature resistant borosilicate glass, the motor must be explosion-proof and connected to a grounding device to prevent static electricity from igniting volatiles.

[0091] Molecular-level dehydration refers to reducing the water content in cleaning agents using adsorption dehydration or molecular-level membrane filtration separation technology, thus preventing water from affecting insulation performance. Adsorption dehydration involves passing the distilled cleaning agent through a chromatography column filled with 3A molecular sieves at a flow rate controlled at 1-2 L / h. The molecular sieves' strong water absorption removes trace amounts of water. The molecular sieves are regenerated after processing every 50 L of cleaning agent. Molecular-level membrane filtration separation technology uses a pervaporation membrane, preferably a polyimide composite membrane. At 40-50℃ and an operating pressure of 0.1-0.2 MPa, the cleaning agent passes through the membrane module. Water molecules preferentially permeate the membrane and are removed by a vacuum pump, reducing the water content to below 0.03% after dehydration.

[0092] After the above dehydration process, a Karl Fischer moisture analyzer is used to take samples for testing. Only after passing the test can the next step be carried out. Furthermore, the molecular sieve needs to be activated (calcined for 4 hours before first use) to avoid poor dehydration due to insufficient adsorption capacity; during membrane separation, the feed flow rate must be controlled to maintain stability, as excessive flow rate fluctuations can lead to concentration polarization on the membrane surface, reducing dehydration efficiency; the cleaning agent after dehydration must be immediately transferred to a dry, sealed container, with nitrogen gas purging the container beforehand to replace the air and prevent moisture from the air from re-entering.

[0093] Antioxidant protection refers to inhibiting the oxidative degradation of easily oxidized components in cleaning agents through physical or chemical means, thereby extending the product's shelf life. Specifically, this can be achieved by adding antioxidants, inert gas encapsulation, and light-protected storage pretreatment. For adding antioxidants, hindered phenolic antioxidants or phosphite antioxidants can be added at a ratio of 0.05%-0.1% of the total mass, and stirred for 10-15 minutes to ensure uniform dispersion. Inert gas encapsulation involves purging nitrogen into the cleaning agent storage tank to replace the air inside and maintaining a slight positive pressure of 0.01-0.02 MPa to prevent external oxygen from penetrating.

[0094] Step S4, simulated packaging storage, includes packaging material selection, safety protection, packaging sealing, and storage protection. It requires the use of protective materials composed of highly reactive chemical substances that are non-flammable, non-explosive, non-toxic, non-corrosive, and environmentally friendly. Specific details are as follows:

[0095] Packaging material selection refers to choosing packaging materials that balance sealing, corrosion resistance, insulation, and safety to prevent leakage, deterioration, or impact on performance of the cleaning agent. High-density polyethylene bottles or aluminum pressure vessels are selected, with anodized inner walls and a thickness ≥50μm. Capacity is chosen based on the intended use. A threaded cap with a nitrile rubber sealing ring is used to complement the sealing structure. An anti-static packaging bag is used as the outer layer, followed by a corrugated cardboard box filled with pearl cotton cushioning material to prevent damage during transportation. It is important to note that the packaging materials must undergo insulation testing beforehand to prevent safety hazards caused by conductive materials.

[0096] Safety protection refers to reducing risks during the packaging process by focusing on three aspects: personnel operation safety, packaging labeling, and emergency protection. Operators must wear solvent-resistant gloves, goggles, and anti-static work clothes. Eyewash stations are provided in the work area, and an emergency kit containing absorbent cotton, neutralizing agent, first-aid gauze, and instructions is placed next to each batch of packaging lines.

[0097] Packaging and sealing refer to ensuring the cleaning agent remains stable within the packaging through standardized filling and sealing processes, minimizing the impact of the external environment. Use explosion-proof filling machines, filling to 90%-95% of the container capacity, but allowing for expansion space to prevent excessive internal pressure due to high temperatures. Control the filling speed at 5-10 L / min. Alternatively, use thickened plastic drums for packaging, suitable for storage in a cool, dry, and well-ventilated place, ideally at a temperature between 0 and 40℃.

[0098] Storage protection refers to conducting stability tests simulating actual storage environments and establishing strict storage management standards to ensure the performance of the cleaning agent. Packaged samples are placed in a constant temperature and humidity chamber and stored at 40℃ and 75% relative humidity for 30 days. Insulation performance is tested every 7 days, including dielectric constant, volume resistivity, and whether there is delamination or discoloration. The performance change rate must be ≤5%. After accelerated aging testing, if the sample performance fails to meet the standards, the packaging materials or sealing process must be traced.

[0099] Step S5, quality inspection and evaluation includes performance testing, scenario testing, and security testing. Specific details are as follows:

[0100] Performance testing refers to the precise detection of the core functional indicators of a cleaning agent to verify whether it meets the basic requirements for live-line cleaning. The core functional indicators of a cleaning agent in performance testing include insulation performance, detergency, and stability, specifically manifested as follows:

[0101] Insulation performance testing: The dielectric constant of the cleaning agent is measured using a dielectric loss meter, requiring a dielectric constant of 5-8 F / m at 25℃; the volume resistivity is measured using a megohmmeter, requiring a value ≥1×10⁻⁶. 14 Ω·cm; its dielectric strength, tested by high-voltage breakdown test, should be ≥30kV / mm;

[0102] Decontamination ability test: Prepare a simulated stain sample, which is a mixture of transformer oil, dust and metal oxide in a ratio of 3:2:1. Apply it evenly to a glass test piece, let it dry, and then spray and wipe it with a cleaning agent. Use a gray scale to compare the amount of stain residue on the test piece before and after cleaning. The decontamination rate must be ≥95%.

[0103] Stability test: After sealing the cleaning agent, freeze it at -10℃ for 24 hours and place it at 60℃ for 24 hours respectively. After returning to room temperature, observe whether there is stratification or precipitation. Take another sample and let it stand at room temperature for 3 months, and observe the state changes once a week. The requirement is that there should be no obvious changes in appearance and performance.

[0104] Scenario testing simulates actual live-line cleaning scenarios to verify the applicability of cleaning agents under different equipment and operating conditions, ensuring their effective performance without damaging the equipment. Typical live-line insulating equipment components are selected, and a simulated live-line environment is built in the laboratory. Cleaning agents are used for live-line spraying and cleaning, with continuous observation for 30 minutes. The equipment must exhibit no flashover or breakdown, and the insulation resistance decrease should be ≤10%. Commonly used material samples are immersed in the cleaning agent for 72 hours, and the mass and volume changes of the samples before and after immersion are measured. Surface corrosion, discoloration, and cracking are observed. Cleaning tests are conducted on the same batch of equipment components in environments with relative humidity of 30%, 60%, and 90%, detecting the cleaning effect and changes in insulation performance of the cleaning agent. The cleaning agent must maintain stable cleaning capabilities and insulation even in high humidity environments.

[0105] Safety testing refers to inspections conducted from three aspects: fire safety, personnel safety, and environmental safety, to ensure that the cleaning agent poses no safety hazards during storage, transportation, and use. The flash point of the cleaning agent is determined using a closed-cup flash point meter, requiring ≥60℃; an autoignition point test is conducted to ensure its autoignition point is ≥300℃; an explosion limit test is performed, ensuring that the explosion limit of its vapor mixed with air is outside the safe range; and acute oral toxicity tests, skin irritation tests, and eye irritation tests are conducted.

[0106] One point to note is:

[0107] The finished product is non-toxic, but it is an industrial chemical product and is prohibited from being consumed.

[0108] Operators must wear protective gloves and goggles;

[0109] If it accidentally comes into contact with human mucous membranes, please rinse immediately with plenty of water. If any adverse reaction occurs, please seek medical attention promptly.

[0110] To prevent contact with children and vulnerable groups, please store the sealant in a place that is not easily accessible;

[0111] Storage method: Store in a cool, dry place, separately, and avoid direct sunlight.

[0112] Four sets of comparative experiments show that:

[0113]

[0114]

[0115] From a performance testing perspective: as the proportion of the base material increases, the volume resistivity shows an upward trend, indicating enhanced insulation performance. For example, in Experiment 4, when the base material proportion was 70%, the volume resistivity was the highest, at 1.8 × 10⁻⁶. 14 Ω·cm; however, the cleaning rate decreased as the proportion of the base material increased. In Experiment 1, the cleaning rate was 96% when the base material proportion was 50%, while in Experiment 4 it dropped to 90%, indicating that an excessively high proportion of base material would affect the cleaning effect.

[0116] From the perspective of scenario testing: the decrease in insulation resistance of the equipment after live cleaning was generally small, all within 10%, with Experiment 4 showing the smallest decrease at 5%, indicating good insulation stability; in terms of material compatibility, the mass change rate of each experiment was ≤0.8%, which meets the requirements, and Experiment 4 had a relatively smaller impact on the material due to the high proportion of base material.

[0117] In summary, Experiments 2 and 3 showed a good balance in performance and scenario testing, ensuring good insulation performance and decontamination rate while also functioning stably in real-world scenarios, making them suitable formulation ratios.

[0118] Further explanation:

[0119] In sensitivity monitoring, the phased approach refers to manual observation and data collection every 1.25-1.5 hours to facilitate full monitoring of the cleaning agent's storage process.

[0120] For products requiring antioxidant protection, the shelf life must be ≥16 months.

[0121] The above preparation method can achieve the following:

[0122] 1. The equipment cleaning agent has high insulation properties, does not affect the operation of electrical appliances, meets the requirements for live cleaning, and is resistant to high voltage (25kV). When working on live equipment, it can clean some electrical and mechanical equipment that cannot be shut down without disassembly.

[0123] 2. Under normal operating conditions, it can quickly and thoroughly remove static electricity, oil, dust, salt, metallic dust and other harmful substances from the equipment, effectively improving the safety and reliability of the equipment and ensuring that the equipment is working in its best condition.

[0124] 3. It does not damage various metals, electronic components, rubber, phenolic resin and other finishes on printed circuit boards. Small equipment can be soaked and cleaned.

[0125] 4. Due to the unique properties of hydrocarbons, it is non-toxic, harmless, and pollution-free; it evaporates quickly after cleaning, has no flash point, and is non-flammable.

[0126] 5. Can be used with drone cleaning, with a maximum puncture resistance of 500KV.

[0127] It should be noted that the specific models and specifications of the explosion-proof mixing vessel, insulation testing instrument, electronic scale, pH meter and thermometer need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated here.

[0128] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for preparing a composite cleaning agent for electrically insulating equipment, characterized in that, The preparation method includes the following steps: Step S1, material preparation and pretreatment; Step S2, complex reaction; Step S3, deep purification; Step S4: Package and simulate storage; Step S5, quality inspection and evaluation.

2. The method for preparing a composite cleaning agent for electrically insulating equipment according to claim 1, characterized in that, Step S1, material preparation pretreatment includes base material preparation, main material preparation, auxiliary material preparation, equipment preparation and raw material processing; Step S2, the composite reaction includes weighing and proportioning, mixing reaction, condition control and sensitivity monitoring; Step S3, deep purification includes distillation to remove impurities, molecular-level dehydration, and anti-oxidation protection; Step S4, packaging simulation storage, includes packaging material selection, safety protection, packaging sealing and storage protection; Step S5, the quality inspection and evaluation includes performance testing, scenario testing and security testing.

3. The method for preparing a composite cleaning agent for electrically insulating equipment according to claim 2, characterized in that, The preparation of the base material refers to the preparation of a high-purity insulating solvent; The preparation of the main materials refers to the preparation of detergents, insulation enhancers, and corrosion inhibitors; The preparation of excipients refers to the preparation of pH adjuster, defoamer, and fragrance; The equipment preparation refers to preparing an explosion-proof mixing tank, insulation testing instruments, electronic scales, pH meters, and thermometers; The raw material processing refers to the pretreatment of base materials, main materials, and auxiliary materials to remove impurities and adjust their state to ensure that they meet the preparation requirements.

4. The preparation method of a composite cleaning agent for electrically insulating equipment according to claim 2, characterized in that, The weighing ratio refers to accurately weighing the base material, main material and auxiliary material according to the predetermined formula in step S1 material preparation and pretreatment, to ensure that the proportions of each component are correct. The mixing reaction refers to adding the weighed base material, main material and auxiliary material into the reaction vessel in a specific order and stirring to promote physical or chemical reactions between the components. The aforementioned condition control refers to the precise control of reaction temperature, pressure, and time conditions to provide a suitable environment for the complex reaction, ensuring a complete reaction and stable product performance; The sensitivity monitoring refers to the periodic monitoring of the key performance indicators of the cleaning agent during the reaction process, so as to promptly detect and correct deviations.

5. The preparation method of a composite cleaning agent for electrically insulating equipment according to claim 2, characterized in that, The distillation process refers to removing low-boiling-point impurities and high-boiling-point residues from the cleaning agent through distillation separation, thereby improving purity. The molecular-level dehydration refers to the use of adsorption dehydration or molecular-level membrane separation technology to reduce the water content in the cleaning agent, so as to avoid water affecting the insulation performance. The aforementioned anti-oxidation protection refers to inhibiting the oxidative degradation of easily oxidized components in the cleaning agent through physical or chemical means, thereby extending the product's shelf life.

6. The method for preparing a composite cleaning agent for electrically insulating equipment according to claim 2, characterized in that, The selection of packaging materials refers to choosing packaging materials that need to take into account sealing, corrosion resistance, insulation and safety, and prevent the cleaning agent from leaking, deteriorating or affecting its performance. The aforementioned safety protection refers to reducing risks during the packaging process by focusing on three aspects: personnel operation safety, packaging labeling, and emergency protection. The packaging and sealing process refers to ensuring that the cleaning agent remains stable within the packaging through standardized filling and sealing procedures, thereby reducing the impact of the external environment. The aforementioned storage protection refers to conducting stability tests simulating actual storage environments and establishing strict storage management standards to ensure the performance of the cleaning agent.

7. The preparation method of a composite cleaning agent for electrically insulating equipment according to claim 2, characterized in that, The performance test refers to the precise detection of the core functional indicators of the cleaning agent to verify whether it meets the basic requirements for live cleaning. The scenario test refers to simulating actual live cleaning scenarios to verify the applicability of the cleaning agent under different equipment and working conditions, and to ensure that it can play an effective role without damaging the equipment. The safety test refers to the inspection from three aspects: fire safety, personnel safety, and environmental safety, to ensure that the cleaning agent has no safety hazards during storage, transportation, and use.

8. The method for preparing a composite cleaning agent for electrically insulating equipment according to claim 4, characterized in that, The sensitivity monitoring process involves phased data collection, which is performed manually every 1.25-1.5 hours.

9. The method for preparing a composite cleaning agent for electrically insulating equipment according to claim 5, characterized in that, The product shelf life requirement for the aforementioned anti-oxidation protection is ≥16 months.

10. The method for preparing a composite cleaning agent for electrically insulating equipment according to claim 7, characterized in that, The core functional indicators of the cleaning agent in the performance test include insulation performance, decontamination ability, and stability.

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