On-site material identification method of rubber product

Abstract

The invention provides an on-site material identification method for rubber products, which comprises the following steps: establishing a standard material spectrogram library of the rubber products according to purchase requirements of the rubber products; selecting a measuring point position of the rubber product on site; processing the surface of the measuring point at the measuring point position so as to ensure that the surface of the measuring point is clean, free of other impurities and dry; installing a probe, turning on the handheld Fourier infrared spectrometer, setting scanning times, selecting a test method, enabling the probe to be in contact with the surface of a test point, adjusting the angle and the force of the probe, and then carrying out detection; the handheld Fourier infrared spectrometer is kept stable, data are collected, and a field rubber product material spectrogram is obtained; and comparing the characteristic peak of the material spectrogram of the on-site rubber product with the characteristic peak of the standard material spectrogram library to confirm the real material information of the rubber product. According to the method, the real material information of the rubber product is confirmed by establishing the standard material spectrogram library of the rubber product and comparing the standard material spectrogram library with the on-site rubber product material spectrogram detected on site.

Description

Technical Field

[0001] The present application belongs to the technical field of rubber product material identification, and specifically relates to an on-site material identification method for rubber products. Background Art

[0002] Take the rubber expansion sleeve as an example. The rubber expansion sleeve is an important component in the phase-isolated enclosed busbar, which plays the role of insulation and connection. At present, there is no national standard that clearly stipulates the material requirements for the rubber expansion sleeve of the phase-isolated enclosed busbar. The industry standard HG / T 2949 "Electrical Insulation Rubber Sheet" divides rubber sheets into 4 types according to their use, but does not specify the specific rubber material. It is difficult to determine the long-term service performance of rubber products based on short-term performance alone.

[0003] After years of experience in nuclear power plant operation, operators found that some phase-isolated enclosed busbar rubber expansion sleeves can serve normally for 10 years, but some phase-isolated enclosed busbar rubber expansion sleeves only operate for 2-3 years before cracks appear and fail, affecting the economy and safety of nuclear power. Further analysis found that some suppliers did not provide expansion sleeves of specified materials, such as EPDM rubber, in accordance with procurement requirements, which led to the premature failure of some expansion sleeves.

[0004] At present, the material identification of rubber sleeves mostly relies on large laboratory equipment, which is complicated to operate and requires sample pretreatment. It is not only inconvenient for rapid outdoor or on-site testing, but also requires sample destruction.

[0005] Therefore, there is an urgent need for a portable, easy-to-operate, non-destructive, and on-site implementable material identification method to confirm the true material information of the rubber expansion sleeve of the phase-isolated enclosed busbar in a nuclear power plant. Summary of the invention

[0006] In view of this, the present application is dedicated to providing an on-site material identification method for rubber products, which confirms the true material information of rubber products by establishing a standard material spectrum library for rubber products and comparing it with the on-site material spectrum of rubber products tested on-site.

[0007] The present application provides an on-site material identification method for a rubber product, the on-site material identification method for a rubber product comprising:

[0008] S1. Establish a standard material spectrum library for rubber products based on the purchasing requirements of rubber products;

[0009] S2. Select the measuring point of rubber products on site;

[0010] S3. Process the surface of the measuring point at the measuring point position to ensure that the surface of the measuring point is clean, free of other impurities, and dry;

[0011] S4. Install the probe, turn on the handheld Fourier infrared spectrometer, set the number of scans, select the test method, touch the probe to the surface of the measuring point, adjust the probe angle and strength, and then conduct the test;

[0012] S5. Keep the handheld Fourier infrared spectrometer stable, collect data, and obtain the material spectrum of the rubber products on site;

[0013] S6. Compare the characteristic peaks of the material spectrum of the on-site rubber products with the characteristic peaks of the standard material spectrum library to confirm the real material information of the rubber products.

[0014] In a specific embodiment of the present application, the above S3 includes: using anhydrous alcohol and a dust-free cloth to wipe the surface of the measuring point, and the wiping area of ​​a single measuring point is not less than 4cm 2 , and then use a hair dryer to blow the surface of the measuring point until it is dry.

[0015] In a specific embodiment of the present application, the spectral test range of the handheld Fourier transform infrared spectrometer is 4000-650cm -1 .

[0016] In a specific embodiment of the present application, the probe is a Ge-ATR probe.

[0017] In a specific embodiment of the present application, the number of scans is no less than 64 times.

[0018] In a specific embodiment of the present application, the on-site material identification method of the rubber product further includes S7.

[0019] S7. Repeat S2 to S5, and test the same rubber product at no less than 5 different measuring points.

[0020] In a specific embodiment of the present application, the rubber product is a rubber expansion sleeve in a phase-isolated enclosed busbar.

[0021] The above S1 includes: establishing a standard material spectrum library of rubber expansion sleeves according to the procurement requirements of rubber expansion sleeves in the phase-isolated enclosed busbar.

[0022] The above S2 includes: selecting the measuring point position of the phase-isolated enclosed busbar rubber expansion sleeve on site.

[0023] The above S4 includes: installing a probe for the rubber expansion sleeve disassembled on site, turning on a handheld Fourier infrared spectrometer with a matching fixture, setting the number of scans, selecting a test method, contacting the probe with the surface of the measuring point, adjusting the angle and strength of the probe, and then conducting a test.

[0024] The above-mentioned S5 includes: maintaining the handheld Fourier infrared spectrometer stable, collecting data, and obtaining the material spectrum of the rubber expansion sleeve on site.

[0025] The above S6 includes: comparing the characteristic peaks of the material spectrum of the rubber expansion sleeve obtained on site with the characteristic peaks of the standard material spectrum library to confirm the real material information of the rubber expansion sleeve on site.

[0026] In one embodiment of the present application, the wave number range of 2800-3000 cm is not used. -1 As a characteristic peak of rubber expansion sleeve.

[0027] In a specific embodiment of the present application, the measuring point is selected as the position where the inner side is pasted to the busbar metal tube.

[0028] The beneficial effect of the technical solution of the present application is that: by establishing a standard material spectrum library of rubber products according to the purchase requirements of rubber products, and using a handheld Fourier infrared spectrometer to test rubber products on site, obtaining the material spectrum of the rubber products on site, and by comparing the material spectrum of the rubber products on site with the standard material spectrum library, the real material information of the rubber products is confirmed, thereby realizing the real material information of the rubber products on site to be quickly confirmed on site without destroying the rubber products on site, shortening the detection cycle, reducing the detection cost, and ensuring the safe and stable operation of equipment using rubber products. In addition, the embodiment of the present application provides a convenient way to non-destructively identify the materials of rubber products outdoors or in use, and the real material information of the rubber products can be directly confirmed on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The figure is a schematic flow chart of an on-site material identification method for a rubber product provided in one embodiment of the present application.

[0030] Figure 2 Shown is a schematic structural diagram of a fixture used in conjunction with a handheld Fourier infrared spectrometer provided by an embodiment of the present application.

[0031] Figure 3 The figure shows a schematic diagram of the detection results of detecting five different measuring point positions of the same rubber expansion sleeve provided by an embodiment of the present application.

[0032] Figure 4 Shown is a spectrum of a phase-isolated closed busbar rubber sleeve obtained by a handheld Fourier infrared spectrometer provided by an embodiment of the present application.

[0033] Figure 5 Shown is a material spectrum diagram of the front side of a rubber product provided by one embodiment of the present application.

[0034] Figure 6 Shown is a material spectrum of the reverse side of a rubber product provided in one embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] At least one embodiment of the present application provides a method for on-site material identification of rubber products, referring to Figure 1 The on-site material identification method of the rubber product comprises the following steps.

[0037] S1. According to the purchasing requirements of rubber products, a standard material spectrum library of rubber products is established.

[0038] S2. Select the measuring point location of the rubber product on site.

[0039] S3. Process the measuring point surface at the measuring point location to ensure that the measuring point surface is clean, free of other impurities, and dry.

[0040] It should be noted that other impurities may be dust and the like.

[0041] S3.1. Use anhydrous alcohol and dust-free cloth to wipe the surface of the measuring point. The wiping area of ​​a single measuring point should not be less than 4cm. 2 , and then use a hair dryer to blow the surface of the measuring point until it is dry.

[0042] S4. Install the probe, turn on the handheld Fourier infrared spectrometer, set the number of scans, select the test method, touch the probe to the surface of the measuring point, adjust the probe angle and strength, and then conduct the test.

[0043] It should be noted that in S4, the probe angle and strength are adjusted to ensure good contact and high signal strength.

[0044] S5. Keep the handheld Fourier infrared spectrometer stable, collect data, and obtain the material spectrum of the rubber products on site.

[0045] In at least one embodiment of the present application, the spectral test range of the handheld Fourier transform infrared spectrometer is 4000-650cm -1 .

[0046] In at least one embodiment of the present application, the probe is a Ge-ATR probe.

[0047] In at least one embodiment of the present application, the number of scans is no less than 64 times.

[0048] S6. Compare the characteristic peaks of the material spectrum of the on-site rubber products with the characteristic peaks of the standard material spectrum library to confirm the real material information of the rubber products.

[0049] It should be noted that the characteristic peaks of the material spectrum of the rubber product on site can be compared with the characteristic peaks of the standard material spectrum library to confirm the real material information of the rubber product, or the standard material spectrum library can be stored in a handheld Fourier transform infrared spectrometer and automatically compared using the handheld Fourier transform infrared spectrometer to confirm the real material information of the rubber product.

[0050] According to the technical solution provided in the embodiment of the present application, a standard material spectrum library of rubber products is established according to the purchase requirements of rubber products, and a handheld Fourier infrared spectrometer is used to detect rubber products on site, and the material spectrum of the rubber products on site is obtained. By comparing the material spectrum of the rubber products on site with the standard material spectrum library, the real material information of the rubber products is confirmed, thereby realizing the real material information of the rubber products on site to be quickly confirmed on site without destroying the rubber products on site, shortening the detection cycle, reducing the detection cost, and ensuring the safe and stable operation of equipment using rubber products. In addition, the embodiment of the present application provides a convenient way to non-destructively identify the materials of rubber products outdoors or in use, and the real material information of the rubber products can be directly confirmed on site.

[0051] In at least one embodiment of the present application, the on-site material identification method of the rubber product further includes S7.

[0052] S7. Repeat S2 to S5, and test the same rubber product at no less than 5 different measuring points. This is helpful to ensure the repeatability and accuracy of the spectrum.

[0053] The on-site material identification method of a rubber product provided in the embodiment of the present application can be used for on-site rapid material identification of all rubber products in a nuclear power plant. Hereinafter, an on-site material identification method of a rubber product provided in the embodiment of the present application is applied to on-site rapid material identification of a rubber expansion sleeve in a phase-isolated enclosed busbar as an example.

[0054] In at least one embodiment of the present application, the rubber product is a rubber expansion sleeve in a phase-isolated enclosed busbar. The difference from the above embodiment is that S1.1 is a specific implementation of S1, S2.1 is a specific implementation of S2, S5.1 is a specific implementation of S5, and S6.1 is a specific implementation of S6.

[0055] S1.1. According to the procurement requirements of rubber expansion sleeves in phase-isolated enclosed busbars, a standard material spectrum library of rubber expansion sleeves is established.

[0056] S2.1. Select the measuring point location of the rubber expansion sleeve of the phase-isolated enclosed busbar on site.

[0057] In at least one embodiment of the present application, the measuring point is selected as the position where the inner side has been pasted to the busbar metal tube, so that the device and the measuring point can be well contacted.

[0058] S4.1. For the rubber expansion sleeve disassembled on site, install the probe, turn on the handheld Fourier infrared spectrometer with the matching fixture, set the number of scans, select the test method, contact the probe with the surface of the measuring point, adjust the probe angle and strength, and then conduct the test.

[0059] For example, the schematic diagram of the fixture used with a handheld FTIR spectrometer is shown in Figure 2 shown.

[0060] S5.1. Keep the handheld Fourier infrared spectrometer stable, collect data, and obtain the material spectrum of the rubber expansion sleeve on site.

[0061] S6.1. Compare the characteristic peaks of the material spectrum of the rubber expansion sleeve obtained on site with the characteristic peaks of the standard material spectrum library to confirm the real material information of the rubber expansion sleeve on site.

[0062] For example, repeat S2.1, S3, S4.1 and S5.1, and test 5 different measuring points with the same rubber expansion sleeve. The test results are as follows: Figure 3 shown.

[0063] In at least one embodiment of the present application, the wave number range of 2800-3000 cm is not used in S6.1. -1 As the characteristic peak of the rubber expansion sleeve, the parts that do not belong to the characteristic peak of the rubber expansion sleeve can be excluded, thereby improving the efficiency and accuracy of identification.

[0064] In the embodiment of the present application, a standard material spectrum library of the rubber expansion sleeve is established and obtained on-site using a handheld Fourier infrared spectrometer, and the material spectrum of the rubber expansion sleeve is obtained on-site, and the characteristic peaks of the rubber expansion sleeve material spectrum obtained on-site are compared with the characteristic peaks of the standard material spectrum library, thereby achieving the premise of not destroying the expansion sleeve, quickly confirming the true material information of the phase-isolated closed busbar rubber expansion sleeve on-site, shortening the detection cycle, reducing the detection cost, and ensuring the safe and stable operation of the nuclear power plant.

[0065] In the following, in combination with a specific embodiment, an example is given of applying a method for on-site material identification of a rubber product provided in an embodiment of the present application to on-site rapid material identification of a rubber expansion sleeve in a phase-isolated enclosed busbar.

[0066] Embodiment 1:

[0067] (1) Select the rubber expansion sleeve of the phase-isolated enclosed busbar on site, and use the rubber part that has been pasted to the busbar metal tube as the measuring point.

[0068] (2) Wipe the measuring points with anhydrous alcohol and dust-free cloth. The wiping area of ​​each measuring point should be no less than 4 cm. 2 , and then use a hair dryer to blow the surface of the measuring point; ensure that the surface of the measuring point is clean, free of dust and other impurities, and the surface of the measuring point is dry.

[0069] (3) Install the Ge-ATR probe, turn on the handheld Fourier transform infrared spectrometer, set the number of scans to 64, touch the instrument probe to the surface of the measuring point, adjust the probe angle and strength to ensure good contact and high signal strength.

[0070] (4) Keep the equipment stable, collect data, and obtain the material spectrum of the rubber expansion sleeve on site.

[0071] (5) Repeat steps (1) to (4) and repeat the test 5 times at similar measuring points.

[0072] (6) Compare the characteristic peaks of the material spectrum of the rubber expansion sleeve obtained on site with the characteristic peaks of the standard material spectrum to confirm the true material information of the rubber expansion sleeve on site.

[0073] (7) According to the standard peak comparison results, it can be concluded that the rubber sleeve is made of EPDM rubber.

[0074] For example, when the material is EPDM rubber, the spectrum of a phase-isolated closed busbar rubber sleeve obtained by a handheld Fourier infrared spectrometer is referenced Figure 4 shown.

[0075] Embodiment 2:

[0076] (1) A sheet rubber product with a fabric interlayer was obtained from a power plant. The rubber material was EPDM rubber.

[0077] (2) According to the method of the above-mentioned embodiment 1, the front side of the rubber product is subjected to on-site rapid material identification, and the obtained material spectrum is as follows: Figure 5 As shown;

[0078] (3) According to the method of the above-mentioned embodiment 1, the reverse side of the rubber product is subjected to on-site rapid material identification, and the obtained material spectrum is as follows: Figure 6 As shown;

[0079] (4) Compare the material spectrum obtained by positive detection, the material spectrum obtained by negative detection and the standard spectrum library;

[0080] (5) It was found that the front rubber material was nitrile rubber and the back rubber material was EPDM rubber;

[0081] (6) According to the test results, the front rubber material does not match the design material, while the back rubber material meets the design requirements.

[0082] It should be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0083] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0084] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0085] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for on-site material identification of rubber products, characterized in that: include: S1. Establish a standard material spectrum library for rubber products based on the purchasing requirements of rubber products; S2. Select the measuring point of rubber products on site; S3. Process the surface of the measuring point at the measuring point position to ensure that the surface of the measuring point is clean, free of other impurities, and dry; S4. Install the probe, turn on the handheld Fourier infrared spectrometer, set the number of scans, select the test method, touch the probe to the surface of the measuring point, adjust the probe angle and strength, and then conduct the test; S5. Keep the handheld Fourier infrared spectrometer stable, collect data, and obtain the material spectrum of the rubber products on site; S6. Compare the characteristic peaks of the material spectrum of the on-site rubber products with the characteristic peaks of the standard material spectrum library to confirm the real material information of the rubber products.

2. The on-site material identification method for rubber products according to claim 1, characterized in that S3 include: Use anhydrous alcohol and dust-free cloth to wipe the surface of the measuring point. The wiping area of ​​a single measuring point should be no less than 4cm. 2 , and then use a hair dryer to blow the surface of the measuring point until it is dry.

3. The on-site material identification method of a rubber product according to claim 1, characterized in that: The spectrum test range of the handheld Fourier transform infrared spectrometer is 4000~650cm -1 .

4. The on-site material identification method of a rubber product according to claim 1, characterized in that: The probe is a Ge-ATR probe.

5. The on-site material identification method of a rubber product according to claim 1, characterized in that: The number of scans shall not be less than 64 times.

6. The on-site material identification method of a rubber product according to claim 1, characterized in that: Also includes: S7. Repeat S2 to S5, and test the same rubber product at no less than 5 different measuring points.

7. A method for on-site material identification of rubber products according to any one of claims 1 to 6, characterized in that: The rubber product is the rubber expansion sleeve in the phase-isolated enclosed busbar. Among them, S1 includes: according to the procurement requirements of rubber expansion sleeves in phase-isolated enclosed busbars, a standard material spectrum library of rubber expansion sleeves is established; S2 includes: selecting the measuring point position of the phase-isolated enclosed busbar rubber expansion sleeve on site; S4 includes: installing the probe on the rubber expansion sleeve removed on site, opening the handheld Fourier infrared spectrometer with the matching fixture, setting the number of scans, selecting the test method, contacting the probe with the surface of the measuring point, adjusting the probe angle and strength, and then conducting the test; S5 includes: keeping the handheld Fourier infrared spectrometer stable, collecting data, and obtaining the material spectrum of the rubber expansion sleeve on site; S6 includes: comparing characteristic peaks of the material spectrum of the rubber expansion sleeve obtained on site with characteristic peaks of a standard material spectrum library to confirm the real material information of the rubber expansion sleeve on site.

8. The on-site material identification method of a rubber product according to claim 7, characterized in that: Not using the wave number range 2800~3000cm -1 As a characteristic peak of rubber expansion sleeve.

9. The on-site material identification method of a rubber product according to claim 7, characterized in that: The measuring point is the position where the inner side is pasted to the busbar metal tube.

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