GIS (Gas Insulated Switchgear) sulfur hexafluoride gas leakage detection color-changing adhesive tape and preparation method thereof

Abstract

The invention provides a GIS sulfur hexafluoride gas leakage detection color-changing adhesive tape and a preparation method thereof, and relates to the technical field of electrical equipment gas leakage detection.The GIS sulfur hexafluoride gas leakage detection color-changing adhesive tape comprises an adhesive tape body, a groove is formed in the top of the adhesive tape body, a carrier soaked with an alkaline solution is embedded in the groove, and the carrier soaked with the alkaline solution loads an indicator. The adhesive tape main body is a nano adhesive tape and has high adhesion and weather resistance. The indicator comprises any one of bromcresol purple, phenolphthalein and methyl orange, the alkaline solution comprises a potassium hydroxide solution or a bicarbonate solution, and the carrier is a porous fiber material or hydrogel. The SF6 leakage detection adhesive tape is low in cost and easy and convenient to operate, and leakage points are visually positioned through color changes.

Description

Technical Field

[0001] The present invention relates to the technical field of gas leakage detection for electrical equipment, and in particular to a color-changing tape for detecting sulfur hexafluoride gas leakage in GIS (gas insulated switchgear) based on chemical reaction color change, which is used to accurately locate equipment leakage points. Background Art

[0002] In existing GIS equipment, sulfur hexafluoride (SF6) serves as an insulating medium. When exposed to arcing, it decomposes to produce acidic gases such as SOF2 and HF. Current methods for detecting SF6 leaks primarily include infrared imagers and gas sensors, but these methods present the following challenges:

[0003] High cost: Professional equipment is expensive and has high maintenance costs;

[0004] Complex operation: requires professional operation and difficult to monitor in real time;

[0005] Difficulty in positioning: It is impossible to quickly and accurately locate tiny leaks.

[0006] In the prior art, there is no solution that can achieve intuitive and low-cost leak location through chemical color change reaction. Summary of the Invention

[0007] The present invention provides a GIS sulfur hexafluoride gas leakage detection color-changing tape and a preparation method thereof, which are used to solve the technical problems raised by the above-mentioned background technology.

[0008] In order to solve the above technical problems, the present invention provides a GIS sulfur hexafluoride gas leak detection color-changing tape, comprising:

[0009] The tape body has a groove on the top, a carrier soaked in alkaline solution is embedded in the groove, and the carrier soaked in alkaline solution is loaded with an indicator.

[0010] Preferably, the tape body is a nano tape, which has high adhesion and weather resistance.

[0011] Preferably, the indicator comprises any one of bromocresol purple, phenolphthalein, and methyl orange, the alkaline solution comprises potassium hydroxide solution or bicarbonate solution, and the carrier is a porous fiber material or a hydrogel.

[0012] Preferably, the concentration of the potassium hydroxide solution is 0.1%-1%, and the concentration of the bromocresol purple indicator is 0.05%-0.2%.

[0013] Preferably, the groove width is 3-5 mm.

[0014] Preferably, the detection principle is:

[0015] When SF6 leaks and decomposes to produce acidic gas, the acidic gas reacts with potassium hydroxide to produce salt and water, causing the pH value of the hydrogel to decrease;

[0016] Bromocresol purple is purple in an alkaline environment and turns yellow in an acidic environment, indicating leakage through color change;

[0017] The acidic gas includes HF; the alkaline environment has a pH value greater than 6.8, and the acidic environment has a pH value less than 5.2.

[0018] A method for preparing a GIS sulfur hexafluoride gas leak detection color-changing tape, used for preparing the GIS sulfur hexafluoride gas leak detection color-changing tape, comprises:

[0019] Step S1: dissolving the indicator in an alkaline solution and impregnating the carrier to obtain an impregnated carrier;

[0020] Step S2: embedding the impregnated carrier into the groove of the tape body to produce a color-changing tape;

[0021] Step S3: attaching the color-changing tape to the part to be leak-tested;

[0022] Step S4: Perform regular inspections to observe the color change of the color-changing tape. The yellow area is the leakage point.

[0023] Preferably, the carrier is a porous hydrogel material or a porous fiber material.

[0024] Preferably, the parts to be leak-detected include: parts prone to leakage of GIS equipment, and the parts prone to leakage of GIS equipment include: joints and flanges of GIS equipment.

[0025] Preferably, in step S1, the indicator is dissolved in the alkaline solution and then stored in an impregnation tank, and the carrier is placed in the impregnation tank for impregnation and taken out after impregnation by a robot, and the impregnation tank is provided with a liquid temperature regulating device;

[0026] During step S1, the carrier impregnation time is periodically determined based on the intelligent control device. The current determination of the carrier impregnation time includes:

[0027] Step S11: obtaining a theoretical permeability range under the conditions of the current carrier, the current indicator, and the current alkaline solution, dividing the theoretical permeability range into several sub-ranges, and determining a time-immersion thickness variation curve for each sub-range;

[0028] Step S12: collecting the penetration influencing parameters of the current impregnation liquid through the collecting devices in different collecting areas in the impregnation box;

[0029] Step S13: determining the distribution difference of each permeability influencing parameter of the current impregnation liquid based on step S11, and when the distribution difference of any permeability influencing parameter is greater than the corresponding preset difference, an alarm is generated by the first early warning module;

[0030] Step S14: When the first early warning module does not issue an early warning, the average value of each permeability influencing parameter obtained in step S12 is compared with the corresponding allowable range. When the average value of any permeability influencing parameter is not within the corresponding allowable range, the second early warning module is controlled to issue an early warning. When the second early warning module does not issue an early warning, the permeability influencing coefficient is determined based on the distribution difference of all the permeability influencing parameters.

[0031] Step S15: When the second warning module does not issue a warning, the equivalent permeability is determined based on the distribution differences of all permeability influencing parameters and the average value of each permeability influencing parameter, and the target immersion time is determined based on the equivalent permeability and the time-immersion thickness variation curve in the sub-range corresponding to the equivalent permeability;

[0032] Step S16: After the target impregnation time is determined for the current time, the current material is controlled to be impregnated based on the target impregnation time until the next impregnation.

[0033] Preferably, the driving unit is a driving motor.

[0034] Compared with the prior art, the beneficial effects of the present invention are: the present invention provides a low-cost, easy-to-operate SF6 leakage detection tape, which can intuitively locate the leakage point through color changes.

[0035] 1. The nanotape is combined with hydrogel, which has a simple structure and high sensitivity;

[0036] 2. The color change of bromocresol purple indicator (purple → yellow) directly reflects the leakage;

[0037] 3. It can be attached to equipment joints and other leak-prone areas to achieve real-time monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 It is a structural schematic diagram of the present invention;

[0040] Figure 2 It is a flow chart of the preparation method of the present invention.

[0041] Reference numerals: 1, tape body; 11, groove; 2, carrier. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0043] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0044] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention provides the following embodiments

[0046] Example 1, the present invention provides a GIS sulfur hexafluoride gas leak detection color-changing tape and a preparation method thereof, such as Figure 1 As shown, including:

[0047] The tape body 1 has a groove 11 on the top thereof, a carrier 2 soaked in alkaline solution is embedded in the groove 11, and the carrier 2 soaked in alkaline solution is loaded with an indicator.

[0048] Preferably, the tape body 1 is a nano tape, which has high adhesion and weather resistance.

[0049] Preferably, the indicator includes any one of bromocresol purple, phenolphthalein, and methyl orange, the alkaline solution includes potassium hydroxide solution or bicarbonate solution, and the carrier 2 is a porous fiber material or a hydrogel.

[0050] Preferably, the concentration of the potassium hydroxide solution is 0.1%-1%, and the concentration of the bromocresol purple indicator is 0.05%-0.2%.

[0051] Preferably, the width of the groove 11 is 3-5 mm.

[0052] Preferably, the detection principle is:

[0053] When SF6 leaks and decomposes to produce acidic gas, the acidic gas reacts with potassium hydroxide to produce salt and water, causing the pH value of the hydrogel to decrease;

[0054] Bromocresol purple is purple in an alkaline environment and turns yellow in an acidic environment, indicating leakage through color change;

[0055] The acidic gas includes HF; the alkaline environment has a pH value greater than 6.8, and the acidic environment has a pH value less than 5.2.

[0056] A method for preparing a GIS sulfur hexafluoride gas leak detection color-changing tape, used for preparing the GIS sulfur hexafluoride gas leak detection color-changing tape, comprises:

[0057] Step S1: dissolving the indicator in an alkaline solution and impregnating the carrier 2 to obtain an impregnated carrier 2;

[0058] Step S2: embedding the impregnated carrier 2 into the groove 11 of the tape body 1 to produce a color-changing tape;

[0059] Step S3: attaching the color-changing tape to the part to be leak-tested;

[0060] Step S4: Perform regular inspections to observe the color change of the color-changing tape. The yellow area is the leakage point.

[0061] Preferably, the carrier 2 is a porous hydrogel material or a porous fiber material.

[0062] Preferably, the parts to be leak-detected include: parts prone to leakage of GIS equipment, and the parts prone to leakage of GIS equipment include: joints and flanges of GIS equipment.

[0063] The beneficial effects of the above technical solution are:

[0064] The invention provides a low-cost, easy-to-operate SF6 leakage detection tape, which can visually locate leakage points through color changes.

[0065] 1. The nanotape is combined with hydrogel, which has a simple structure and high sensitivity;

[0066] 2. The color change of bromocresol purple indicator (purple → yellow) directly reflects the leakage;

[0067] 3. It can be attached to equipment joints and other leak-prone areas to achieve real-time monitoring.

[0068] Example 2, based on Example 1, in step S1, the indicator is dissolved in the alkaline solution and then stored in the impregnation tank, the carrier 2 is placed in the impregnation tank for impregnation and taken out after impregnation by a robot, and the impregnation tank is provided with a liquid temperature regulating device;

[0069] During step S1, the immersion time of the carrier 2 is periodically determined based on the intelligent control device. The current determination of the immersion time of the carrier 2 includes:

[0070] Step S11: obtaining a theoretical permeability range under the conditions of the current carrier 2, the current indicator, and the current alkaline solution, dividing the theoretical permeability range into several sub-ranges, and determining a time-immersion thickness variation curve in each sub-range;

[0071] Step S12: collecting the penetration-influencing parameters of the current immersion liquid by collecting devices in different collecting areas within the immersion box. The penetration-influencing parameters of the immersion liquid include: density of the immersion liquid, viscosity of the immersion liquid; the immersion liquid is a mixture of an indicator and an alkaline solution;

[0072] Step S13: Based on step S11, the distribution difference of each permeability influencing parameter of the current immersion liquid is determined (the absolute value of the difference between the permeability influencing parameter of the immersion liquid collected in step S12 and the standard value of the permeability influencing parameter of the immersion liquid under the conditions of the current immersion liquid temperature, the current seed carrier 2, the current concentration of the seed indicator, and the current concentration of the alkaline solution, and the standard value of the permeability influencing parameter of the immersion liquid under the conditions of the current immersion liquid temperature, the current seed carrier 2, the current concentration of the seed indicator, and the current concentration of the alkaline solution) is determined. When the distribution difference of any permeability influencing parameter is greater than the corresponding preset difference, an alarm is triggered through the first early warning module;

[0073] Step S14: When the first early warning module does not issue an early warning, the average value of each permeability influencing parameter obtained in step S12 is compared with the corresponding allowable range. When the average value of any permeability influencing parameter is not within the corresponding allowable range, the second early warning module is controlled to issue an early warning. When the second early warning module does not issue an early warning, the permeability influencing coefficient W is determined based on the distribution difference of all the permeability influencing parameters.

[0074]

[0075] h i is the distribution difference of the i-th permeability influencing parameter, h i0 is the maximum allowable distribution difference of the i-th permeability influencing parameter, m i is the permeability influence index of the i-th permeability influencing parameter (which can be determined through experiments and has a value of -1 to 3); μi is the weight of the i-th permeability influencing parameter (the value is greater than 0 and less than or equal to 1); M is the total number of permeability influencing parameters (permeability influencing parameters that are easily changed during the impregnation process of the present invention);

[0076] Step S15: When the second warning module does not issue a warning, the equivalent permeability is determined based on the distribution differences of all permeability influencing parameters and the average value of each permeability influencing parameter, and the target immersion time is determined based on the equivalent permeability P and the time-immersion thickness variation curve in the sub-range corresponding to the equivalent permeability;

[0077]

[0078] s i is the average value of the i-th permeability influencing parameter, s i0 is the standard value of the influencing parameter of the penetration force of the impregnation liquid under the conditions of the current impregnation liquid temperature, the current carrier 2, the current concentration of the indicator and the current concentration of the alkaline solution; P0 is the standard value of the influencing parameter of the penetration force of the impregnation liquid under the conditions of the current impregnation liquid temperature, the current carrier 2, the current concentration of the indicator and the current concentration of the alkaline solution.

[0079] Step S16: After the target impregnation time is determined for the current time, the current material is controlled to be impregnated based on the target impregnation time until the next impregnation.

[0080] The theoretical penetration range refers to the numerical range of the ability of an impregnating liquid to penetrate a specific carrier 2 (e.g., a carrier of a specific material, structure, or porosity) under given conditions, using the same indicator concentration range (e.g., 0.05-0.07%) and the same alkaline solution concentration range (e.g., 0.1-0.12%). This range is determined through scientific testing methods (e.g., laboratory simulated immersion experiments, using high-precision instruments to measure the penetration depth and velocity of the impregnating liquid into the carrier 2 at different time points). This range reflects the upper and lower limits of the impregnating liquid's ability to penetrate the carrier 2 under these fixed conditions.

[0081] The time-immersion thickness variation curve under each sub-range takes the average value of the immersion thickness in the corresponding concentration range;

[0082] The beneficial effects of the above technical solution are:

[0083] By real-time monitoring and analysis of key parameters of the impregnation liquid, the impregnation time is precisely controlled to avoid problems such as insufficient impregnation of the carrier 2 due to insufficient impregnation time, or material waste and performance degradation due to excessive impregnation time, thereby ensuring the uniform and stable impregnation quality of the carrier 2 and improving the product qualification rate.

[0084] The dual monitoring and early warning mechanism of the distribution difference and average value of the impregnation liquid parameters can timely detect and deal with problems such as uneven impregnation liquid and abnormal characteristics, ensure that the entire impregnation process is carried out under stable conditions, and reduce production fluctuations caused by changes in environmental factors.

[0085] The use of robotic arms and intelligent control devices can reduce manual intervention, reduce human errors, and improve production efficiency and automation levels.

[0086] At the same time, the intelligent control system can dynamically adjust the immersion time according to actual conditions, adapt to different carriers 2 and solution conditions, and improve production flexibility and adaptability.

[0087] Precise impregnation time control and a stable production process reduce rework and material waste caused by quality issues, improve material utilization, and thus reduce production costs and enhance the company's economic benefits.

[0088] This solution monitors and records key parameters and operations during the impregnation process in detail, facilitating subsequent product quality traceability and production process management, and helping to continuously optimize production processes and improve management levels.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. GIS sulfur hexafluoride gas leak detection color changing tape, characterized by: include: The adhesive tape body (1) has a groove (11) arranged on the top of the adhesive tape body (1), a carrier (2) soaked in an alkaline solution is embedded in the groove (11), and the carrier (2) soaked in the alkaline solution is loaded with an indicator.

2. The GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 1, characterized in that: The adhesive tape body (1) is a nano-adhesive tape with high adhesion and weather resistance.

3. The GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 1, characterized in that: The indicator comprises any one of bromocresol purple, phenolphthalein and methyl orange, the alkaline solution comprises potassium hydroxide solution or bicarbonate solution, and the carrier (2) is a porous fiber material or a hydrogel.

4. The GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 3, characterized in that: The potassium hydroxide solution has a concentration of 0.1%-1%, and the bromocresol purple indicator has a concentration of 0.05%-0.2%.

5. The GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 1, characterized in that: The groove width is 3-5 mm.

6. The GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 1, characterized in that: The detection principle is: When SF6 leaks and decomposes to produce acidic gas, the acidic gas reacts with potassium hydroxide to produce salt and water, causing the pH value of the hydrogel to decrease; Bromocresol purple is purple in an alkaline environment and turns yellow in an acidic environment, indicating leakage through color change; The acidic gas includes HF; the alkaline environment has a pH value greater than 6.8, and the acidic environment has a pH value less than 5.

2.

7. A method for preparing a GIS sulfur hexafluoride gas leak detection color-changing tape, for preparing the GIS sulfur hexafluoride gas leak detection color-changing tape according to any one of claims 1 to 6, characterized in that: include: Step S1: dissolving the indicator in an alkaline solution and impregnating the carrier (2) to obtain an impregnated carrier (2); Step S2: embedding the impregnated carrier (2) into the groove (11) of the tape body (1) to produce a color-changing tape; Step S3: attaching the color-changing tape to the part to be leak-tested; Step S4: Perform regular inspections to observe the color change of the color-changing tape. The yellow area is the leakage point.

8. The method for preparing the GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 7, wherein the carrier (2) is a porous hydrogel material or a porous fiber material.

9. The method for preparing the GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 8, wherein the area to be leak detected comprises: The parts of GIS equipment that are prone to leakage include: GIS equipment joints and flanges.

10. The method for preparing the GIS sulfur hexafluoride gas leak detection color-changing tape according to claim 8, wherein in step S1, the indicator is dissolved in an alkaline solution and then stored in an impregnation tank, a manipulator is used to place the carrier (2) into the impregnation tank for impregnation and remove the carrier after impregnation, and the impregnation tank is provided with a liquid temperature regulating device; During the step S1, the carrier (2) impregnation time is periodically determined based on the intelligent control device, and the current determination of the carrier (2) impregnation time includes: Step S11: obtaining a theoretical permeability range under the conditions of the current carrier (2), the current indicator, and the current alkaline solution, and dividing the theoretical permeability range into several sub-ranges, and determining a time-immersion thickness variation curve under each sub-range; Step S12: collecting the penetration influencing parameters of the current impregnation liquid through the collecting devices in different collecting areas in the impregnation box; Step S13: determining the distribution difference of each permeability influencing parameter of the current impregnation liquid based on step S11, and when the distribution difference of any permeability influencing parameter is greater than the corresponding preset difference, an alarm is generated by the first early warning module; Step S14: When the first early warning module does not issue an early warning, the average value of each permeability influencing parameter obtained in step S12 is compared with the corresponding allowable range. When the average value of any permeability influencing parameter is not within the corresponding allowable range, the second early warning module is controlled to issue an early warning. When the second early warning module does not issue an early warning, the permeability influencing coefficient is determined based on the distribution difference of all the permeability influencing parameters. Step S15: When the second warning module does not issue a warning, the equivalent permeability is determined based on the distribution differences of all permeability influencing parameters and the average value of each permeability influencing parameter, and the target immersion time is determined based on the equivalent permeability and the time-immersion thickness variation curve in the sub-range corresponding to the equivalent permeability; Step S16: After the target impregnation time is determined for the current time, the current material is controlled to be impregnated based on the target impregnation time until the next impregnation.

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