Preparation method of anti-bird cover device with ultra-large umbrella diameter and anti-bird cover device

Abstract

The invention discloses a preparation method of an anti-bird cover device with an ultra-large umbrella diameter and the anti-bird cover device, and relates to the technology of electrical tools and insulators, the preparation method of the anti-bird cover device with the ultra-large umbrella diameter comprises the steps that a hard insulating material is added into a reaction kettle to be stirred to obtain a castable, and the hard insulating material takes alicyclic epoxy resin as a matrix; and the hardware fitting is installed in a mold, the castable is injected into the mold through pressure, primary curing, demolding and secondary curing are carried out, and the anti-bird cover device with the ultra-large umbrella diameter is obtained. According to the anti-bird cover device with the ultra-large umbrella diameter and the manufacturing process of the anti-bird cover device, the diameter of the manufactured umbrella skirt is designed to reach 600 mm or above, the anti-bird cover device is suitable for special environments such as bird damage, icing and rainfall, and the operation reliability of a power transmission line can be effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of electrical tools, and particularly to a preparation method and a bird protection cover device for an ultra-large umbrella diameter bird protection cover device. Background Art

[0002] Insulators are indispensable key components in the power system. Although insulators have a simple structure and significant cost-effectiveness, they play a crucial role in ensuring the safe, stable, and efficient operation of the power system. Any failure of an insulator may pose a serious threat to the stability of the entire power network. In the structure of a transmission line, the conductor bears a very high potential, which may be as high as several hundred thousand volts or even one million volts, while the tower is connected to the ground and is at zero potential. As a bridge connecting the conductor and the tower, the insulator has two missions: on the one hand, it must ensure the electrical isolation between the conductor and the tower, and on the other hand, it must provide a stable mechanical support to withstand the self-weight of the conductor and external mechanical forces such as wind load and icing. Therefore, the insulator must meet the strict requirements of both electrical insulation performance and mechanical strength.

[0003] Porcelain insulators, as insulating materials with a long history, have a quite mature manufacturing process and rich experience in practical applications. Porcelain insulators not only have excellent electrical performance and good weather resistance, but also have diverse umbrella designs and can meet the usage requirements of various complex environments. In the late 1960s, glass insulators quickly emerged and also showed good electrical performance and weather resistance. Their unique zero-value self-explosion characteristic also greatly reduced maintenance work such as zero-value detection and extended the service life. In addition, silicone rubber composite insulators, with their light weight, small size, simple production process, convenient installation and operation, and excellent anti-fouling flashover performance, have also been widely used in transmission lines, and the current usage has exceeded ten million. However, China has a vast territory and complex and changeable environments. Some transmission lines face challenges such as icing, bird damage, and heavy rain, and the demand for large-umbrella-diameter insulators is becoming more urgent. However, the umbrella skirt diameters of current porcelain and glass insulators on the market are generally below 500 mm. If the umbrella skirt diameter is further increased, the product qualification rate will drop significantly. And silicone rubber composite materials, as elastic polymers, are soft in texture and lack sufficient mechanical strength to support the manufacture of large umbrella skirts. Therefore, how to overcome these challenges and successfully manufacture large-umbrella-diameter insulators has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The embodiments of this application provide a preparation method and a bird protection cover device for an ultra-large umbrella diameter bird protection cover device, and propose an ultra-large umbrella diameter bird protection cover device and its manufacturing process, which are applicable to special environments such as bird damage, icing, and rainfall, and can effectively improve the operation reliability of transmission lines.

[0005] The present application provides a method for preparing an ultra-large-diameter bird-proof cover device, comprising:

[0006] Adding a hard insulating material into a reaction kettle and stirring to obtain a casting material, wherein the hard insulating material is based on alicyclic epoxy resin;

[0007] Install the hardware in the mold, inject the casting material into the mold, solidify and demould at one time;

[0008] Secondary curing is performed to obtain an extra-large diameter bird-proof cover device.

[0009] Optionally, the hard insulating material includes weather-resistant epoxy resin, a curing agent, an accelerator and an inorganic filler.

[0010] Optionally, the weight proportions of the alicyclic epoxy resin, the curing agent, the accelerator and the inorganic filler satisfy:

[0011] Alicyclic epoxy resin: 80-120 parts;

[0012] Curing agent: 85-115 parts;

[0013] Accelerator: 0.1 to 2 parts;

[0014] Inorganic filler: 80-400 parts.

[0015] Optionally, the inorganic filler is at least one of silicon dioxide and aluminum hydroxide surface-treated with a coupling agent, and the mesh size of the inorganic filler is 100-5000 mesh.

[0016] Optionally, the weather-resistant epoxy resin is a combination of one or more of diglycidyl hexahydrophthalate, 3,4-epoxycyclohexylcarboxylic acid-3', 4'-epoxycyclohexylmethyl ester, diadipic acid ester, diglycidyl cyclohexane-1,2-dicarboxylate, and hydrogenated bisphenol A epoxy resin.

[0017] Optionally, the curing agent is an anhydride curing agent.

[0018] Optionally, the accelerator is a tertiary amine accelerator.

[0019] Optionally, adding the hard insulating material into the reactor and stirring to obtain the casting material includes:

[0020] Add the hard insulating material into the reaction kettle and stir it. The stirring is carried out at 45-65° C. for 0.5-1.5 hours and the rotation speed is 600-1200 r / min.

[0021] Optionally, the one-step curing process is an automatic pressure gel molding process, and the one-step curing condition is curing for 50-80 minutes within a temperature range of 120-160°C;

[0022] The secondary curing conditions are curing at 70 - 160 °C for 10 - 14 h.

[0023] The embodiment of the present application also proposes an anti - bird cover device with an ultra - large umbrella diameter, including an anti - bird cover device with an ultra - large umbrella diameter prepared by the preparation method of the anti - bird cover device with an ultra - large umbrella diameter as described above. The anti - bird cover device with an ultra - large umbrella diameter is connected to the insulator, or the anti - bird cover devices with an ultra - large umbrella diameter are cascaded, or are connected at intervals with the insulator.

[0024] The embodiment of the present application proposes an anti - bird cover device with an ultra - large umbrella diameter and its manufacturing process, which is applicable to special environments such as bird damage, icing, and rainfall, and can effectively improve the operation reliability of transmission lines.

[0025] The above description is only an overview of the technical solution of the present application. In order to be able to more clearly understand the technical means of the present application, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as a limitation of the present application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0027] Figure 1 is a schematic diagram of the basic process of the preparation method of the anti - bird cover device with an ultra - large umbrella diameter according to the embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the fitting connection of the anti - bird cover device with an ultra - large umbrella diameter according to the embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0030] Insulators are essential key components in the power system, and their demand ranks among the top in the power industry. Traditionally, insulators are mainly made of porcelain, glass or silicone rubber composite insulators. These materials have their own characteristics and are widely used in transmission lines. However, with the continuous expansion of the power grid, the environments of some transmission lines are becoming increasingly complex, such as frequent occurrence of special situations like icing, bird damage and heavy rain. This poses higher requirements for the performance of insulators, especially the demand for large umbrella diameter insulators is becoming more urgent. In the existing technology, although porcelain and glass insulators have stable performance, as the diameter of the umbrella skirt increases, the product qualification rate shows a downward trend, which undoubtedly increases the production cost and the difficulty of quality control. On the other hand, although silicone rubber composite insulators have advantages such as being lightweight and having excellent anti-fouling flashover performance, due to their materials being elastic polymers, their mechanical strength is relatively weak and it is difficult to meet the manufacturing requirements of large umbrella diameter insulators. The present invention provides an anti-bird cover device with an extra-large umbrella diameter and its preparation process, which is applicable to special environments such as bird damage, icing and rainfall, and can effectively improve the operation reliability of transmission lines. The embodiments of the present application provide a preparation method for an anti-bird cover device with an extra-large umbrella diameter, as Figure 1 shown, including the following steps:

[0031] In step S101, a hard insulating material is added to a reaction kettle and stirred to obtain a casting material, where the hard insulating material is based on alicyclic epoxy resin, and after being stirred evenly, a casting material is obtained. In some embodiments, the hard insulating material includes weather-resistant epoxy resins such as alicyclic epoxy resin, a curing agent, an accelerator and inorganic fillers.

[0032] In step S102, the metal fittings are installed in a mold, and the casting material is injected into the mold, and is cured and demolded once. In some examples, for example, the casting material can be injected into the mold under pressure, and thus an anti-bird cover device with an umbrella diameter of 600 mm and above can be directly cured through the mold.

[0033] In step S103, secondary curing is carried out to obtain an anti-bird cover device with an extra-large umbrella diameter.

[0034] In some embodiments, the weight part components of the alicyclic epoxy resin, the curing agent and the inorganic filler satisfy: alicyclic epoxy resin: 80 parts - 120 parts; curing agent: 85 parts - 115 parts; accelerator: 0.1 part - 2 parts; inorganic filler: 80 parts - 400 parts.

[0035] In some embodiments, the inorganic filler is at least one of silica and aluminum hydroxide surface-treated with a coupling agent, and the mesh number of the inorganic filler is 100 mesh - 5000 mesh. The hard umbrella sleeve insulating material in the method of the embodiments of the present application is based on alicyclic epoxy resin, the umbrella skirt has high mechanical strength, and has excellent ultraviolet resistance and tracking resistance characteristics, and can easily prepare a hard umbrella skirt with an umbrella diameter of 600 mm and above.

[0036] In some embodiments, the weather-resistant epoxy resin is one or more combinations of diglycidyl hexahydrophthalate, 3',4'-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate, bis((3,4-epoxycyclohexyl)methyl) adipate, diglycidyl cyclohexane-1,2-dicarboxylate, hydrogenated bisphenol A epoxy resin and other weather-resistant epoxy resins, or at least one combination thereof.

[0037] In some embodiments, the curing agent is an acid anhydride curing agent and the accelerator is a tertiary amine accelerator.

[0038] In some embodiments, adding the rigid insulating material into a reaction kettle and stirring to obtain a casting material includes:

[0039] Adding the rigid insulating material into the reaction kettle and stirring, wherein the stirring is carried out at 45-65°C for 0.5-1.5 hours at a rotation speed of 600-1200 r / min.

[0040] In some embodiments, the primary curing process is an automatic pressure gel molding process, and the primary curing conditions are curing at a temperature in the range of 120-160°C for 50-80 min; the secondary curing conditions are curing at 70-160°C for 10-14 h.

[0041] The embodiment of the present application further provides a preparation method of an ultra-large umbrella diameter anti-bird cover device. In this example, the umbrella skirt is composed of a rigid insulating material, and the rigid insulating material includes an alicyclic epoxy resin, an acid anhydride curing agent, an accelerator and an inorganic filler. The alicyclic epoxy resin can be one or more combinations of diglycidyl hexahydrophthalate, 3',4'-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate, bis((3,4-epoxycyclohexyl)methyl) adipate, diglycidyl cyclohexane-1,2-dicarboxylate, hydrogenated bisphenol A epoxy resin and other weather-resistant epoxy resins.

[0042] The inorganic filler is a flame-retardant and low-expansion filler, and the surface is treated with a coupling agent, and can be at least one of silica powder and aluminum hydroxide, and the mesh number is 500-1000 meshes.

[0043] The preparation method of the ultra-large umbrella diameter rigid umbrella skirt in the embodiment of the present application includes the following steps:

[0044] Step A1: Add the alicyclic epoxy resin, curing agent, accelerator and inorganic filler into the reaction kettle, stir at 60°C for 1.5 hours at a rotation speed of 700 r / min to obtain a casting material.

[0045] Step A2: Install the fitting in the mold, inject the casting material into the mold, cure at a temperature of 150°C for 60 min for the primary curing, and then demold.

[0046] Step A3, as Figure 2 shown, perform secondary curing to obtain an anti-bird cover with an extra-large umbrella diameter. For example, after demolding from the first curing, place it in an oven at 150°C and then perform secondary curing for 10 hours to obtain a rigid umbrella skirt, that is, an anti-bird cover with an extra-large umbrella diameter.

[0047] Table 1 - Components and contents in Examples 1 - 4

[0048]

[0049] Performance detection test

[0050] 1. Breakdown characteristics: Refer to the standard of GB / T 19519 - 2014 to detect the breakdown characteristics of the insulator.

[0051] 2. Leakage resistance characteristics: Refer to the standard of GB / T 19519 - 2014 to detect the leakage resistance characteristics of the insulator.

[0052] 3. Hardness characteristics: Refer to the standard of DL / T 376 - 2019 to detect the hardness characteristics of the insulator.

[0053] 4. Young's modulus: Refer to the standard of GB / T 1040.1 - 2006 to detect the Young's modulus of the insulator.

[0054] Table 2 - Performance detection results of the examples

[0055]

[0056]

[0057] Combined with the performance detection results of the examples in Table 2, it can be seen that the hard material of this application uses alicyclic epoxy resin as the matrix, has good electrical insulation performance and excellent mechanical strength, can simply prepare an anti-bird cover device with an umbrella diameter of 600 mm and above, and there is no special restriction on the umbrella shape, and there is no need to change the existing structure height. It is applicable to special environments such as bird damage, icing, and rainfall, and can effectively improve the operation reliability of the transmission line.

[0058] The embodiment of this application also proposes an anti-bird cover device with an extra-large umbrella diameter, including an anti-bird cover device with an extra-large umbrella diameter prepared by using the preparation method of the anti-bird cover device as described above. The anti-bird cover device with an extra-large umbrella diameter is connected to the insulator, or the anti-bird cover devices with an extra-large umbrella diameter are cascaded, or are connected at intervals with the insulator.

[0059] It should be noted that in each embodiment of the present application, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including such element.

[0060] The serial numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0061] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the spirit of the present application and the scope protected by the claims. All of these are within the protection scope of the present application.

Claims

1. A preparation method of an anti-bird cover device with an ultra-large umbrella diameter, characterized in that, include: Adding a hard insulating material into a reaction kettle and stirring to obtain a casting material, wherein the hard insulating material is based on alicyclic epoxy resin; Install the hardware in the mold, inject the castable into the mold, solidify and demould at one time; Secondary curing is performed to obtain an extra-large diameter bird-proof cover device.

2. The preparation method of the super-large umbrella diameter bird-proof cover device according to claim 1, characterized in that, The hard insulating material comprises weather-resistant epoxy resin, a curing agent, an accelerator and an inorganic filler.

3. The preparation method of the super-large umbrella diameter bird-proof cover device according to claim 2, characterized in that The weight proportions of the alicyclic epoxy resin, the curing agent, the accelerator and the inorganic filler satisfy the following requirements: Alicyclic epoxy resin: 80-120 parts; Curing agent: 85-115 parts; Accelerator: 0.1 to 2 parts; Inorganic filler: 80-400 parts.

4. The preparation method of the super-large umbrella diameter bird-proof cover device according to claim 2, characterized in that, The inorganic filler is at least one of silicon dioxide and aluminum hydroxide surface-treated with a coupling agent, and the mesh size of the inorganic filler is 100-5000 mesh.

5. The preparation method of the super-large umbrella diameter bird-proof cover device according to claim 2, characterized in that, The weather-resistant epoxy resin is a combination of one or more of hexahydrophthalic acid diglycidyl ester, 3,4-epoxycyclohexylcarboxylic acid-3', 4'-epoxycyclohexylmethyl ester, diadipic acid ester, cyclohexane-1,2-dicarboxylic acid diglycidyl ester, and hydrogenated bisphenol A epoxy resin.

6. The preparation method of the super-large umbrella diameter bird-proof cover device according to claim 2, characterized in that, The curing agent is an acid anhydride curing agent.

7. The preparation method of the super-large umbrella diameter bird-proof cover device according to claim 2, characterized in that, The accelerator is a tertiary amine accelerator.

8. The preparation method of the super-large umbrella diameter bird-proof cover device according to claim 1, characterized in that, The hard insulating material is added into the reactor and stirred to obtain the casting material including: Add the hard insulating material into the reaction kettle and stir it. The stirring is carried out at 45-65° C. for 0.5-1.5 hours and the rotation speed is 600-1200 r / min.

9. The method for preparing the super-large umbrella diameter bird-proof cover device according to claim 8, characterized in that: The one-step curing process is an automatic pressure gel molding process, and the one-step curing condition is curing for 50-80 minutes within a temperature range of 120-160°C; The secondary curing conditions are 70-160℃ for 10-14h.

10. An anti-bird cover device with an extremely large umbrella diameter, characterized in that, The invention comprises an extra-large umbrella diameter bird-proof cover device using the preparation method of the extra-large umbrella diameter bird-proof cover device as described in any one of claims 1 to 9, wherein the extra-large umbrella diameter bird-proof cover device is connected to an insulator, or the extra-large umbrella diameter bird-proof cover devices are cascaded or connected to the insulator at intervals.

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