Co2 gas generating arc extinguishing material, preparation method and application thereof

Abstract

The application discloses a CO2-generating arc extinguishing material and a preparation method and application thereof, wherein the preparation method of the CO2-generating arc extinguishing material comprises the following steps: S1, heating and activating porous carrier powder to obtain activated porous carrier powder; S2, placing the activated porous carrier powder in a CO2 atmosphere to perform tumbling and stirring to obtain carrier powder adsorbed with CO2; S3, dispersing the carrier powder adsorbed with CO2 in a liquid polymer, and then performing solidification treatment to obtain a blocky substance; and S4, crushing the blocky substance and then performing screen mesh treatment to obtain the CO2-generating arc extinguishing material, wherein the porous carrier powder is molecular sieve activated powder or active alumina powder. The method adsorbs and fixes CO2 in the porous carrier powder, and then adopts a polymer film-forming material to coat the surface of the porous carrier, so that the CO2 is stably stored in the interior, and the CO2-generating arc extinguishing material prepared in this way has excellent arc extinguishing effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fuses, in particular to the technical field of arc extinguishing materials, and more particularly to a CO2-generating arc extinguishing material, a preparation method and application thereof. BACKGROUND

[0002] As a short-circuit or overload protection device, a fuse is one of the widely used electronic components. When the current in the circuit exceeds the set value, the alloy melt inside the fuse will melt due to heat, thereby cutting off the circuit and protecting the circuit and equipment. However, when the alloy melt of the fuse melts, an electric arc is usually generated at the melting point, which can reach a temperature of several thousand degrees Celsius, easily causing the fuse to rupture or explode and endangering the surrounding environment. Therefore, suppressing and slowing down the electric arc has always been a challenge and a key concern in the field of fuses.

[0003] Currently, the mainstream arc extinguishing methods include a silica solid particle filling method and a gas arc extinguishing method. For the silica solid particle filling method, when an electric arc occurs, the voids of SiO2 particles can absorb metal vapor, separate the electric arc, and physically cool the electric arc, thereby achieving a certain arc extinguishing effect. However, in the fuse housing, the filling density of SiO2 has an upper limit, and the ability of SiO2 to absorb metal vapor and heat per unit volume is also limited. Therefore, this arc extinguishing method has been difficult to adapt to the demand for miniaturization and micro-miniaturization of electronic components, especially high-voltage and high-current electronic components. For the gas arc extinguishing method, sulfur hexafluoride (SF6) is the most widely used arc extinguishing gas at present, which has excellent electrical insulation performance and chemical stability. When an electric arc occurs, SF6 can quickly absorb and consume free electrons in the electric arc, thereby achieving effective arc extinguishing. However, SF6 not only has problems such as high preparation and transportation costs, but also requires a special device for gas storage when it is applied to circuit protection equipment, resulting in a large space occupation of the equipment and being not suitable for miniaturized and micro-miniaturized electronic components such as fuses.

[0004] In recent years, carbon dioxide (CO2) has attracted attention due to its low cost, environmental friendliness, and good arc extinguishing performance. Studies have shown that CO2 can be generated in situ through thermal decomposition of carbonates, basic carbonates, or bicarbonates (as described in patents CN118421053A and CN118039430A), rapidly released and consumed free electrons at high temperatures of electric arcs, and achieved efficient arc extinguishing. However, in the existing technology, the generation of CO2 relies on high-temperature decomposition reactions, which have insufficient matching with the instantaneous high temperature generated by electric arcs, resulting in delayed arc extinguishing and affecting the arc extinguishing effect.

[0005] Therefore, there is an urgent need for a CO2-generating arc extinguishing material, a preparation method and application thereof to solve the problems of the prior art. SUMMARY

[0006] In view of the above problems, the purpose of the present application is to provide a CO2 gas generating arc extinguishing material and its preparation method and application. The method is to adsorb and fix CO2 in porous carrier powder, and then use polymer film forming material to coat the surface of the porous carrier, so that CO2 is stably stored inside. The CO2 gas generating arc extinguishing material prepared in this way has excellent arc extinguishing effect.

[0007] To achieve the above purpose, the first aspect of the present application provides a preparation method of a CO2 gas generating arc extinguishing material, comprising the following steps: S1, heating and activating the porous carrier powder to obtain activated porous carrier powder; S2, placing the activated porous carrier powder in a CO2 atmosphere and stirring to obtain carrier powder adsorbed with CO2; S3, dispersing the carrier powder adsorbed with CO2 in a liquid polymer, and then performing solidification treatment to obtain a block; S4, crushing the block and then performing screen treatment to obtain the CO2 gas generating arc extinguishing material; wherein the porous carrier powder is molecular sieve activated powder or active alumina powder.

[0008] Compared with the prior art, the porous carrier powder used in the present application is molecular sieve activated powder or active alumina powder. Such carrier material has a porous structure and a large specific surface area, has strong CO2 adsorption capacity and large adsorption capacity, and can fix CO2 on the surface and inside at normal temperature and lower temperature. Therefore, the present application first uses porous carrier powder to adsorb and fix CO2, and then uses polymer film forming material to coat the surface of the porous carrier, thereby realizing the sequestration of CO2, significantly improving the stability and long-term storage of the CO2 gas generating arc extinguishing material. When an electric arc occurs, the polymer coating on the surface of the porous carrier melts or breaks down due to heat, and the CO2 adsorbed in the interior of the porous carrier is released instantaneously due to heat. The release rate of CO2 matches the release of arc energy, thereby achieving high-efficiency and rapid arc extinguishing effect. At the same time, the present application can also select the type of polymer according to the specific needs of different fuses to flexibly control the release temperature of CO2. In addition, the preparation method of the CO2 gas generating arc extinguishing material provided by the present application has simple process and low cost, is suitable for large-scale production, and has good industrialization prospect.

[0009] Further, the particle size of the porous carrier powder of the present application is 200 nm to 100 μm. Specifically, the particle size of the porous carrier powder of the present application can be, but is not limited to, 200 nm, 400 nm, 600 nm, 800 nm, 1000 nm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 80 μm, 90 μm, and 100 μm. The particle size of the porous carrier powder of the present application is preferably 1 to 20 μm, and more preferably 1 to 10 μm.

[0010] Further, the molecular sieve activated powder of the present application is selected from at least one of 4A molecular sieve activated powder, 5A molecular sieve activated powder and 13X molecular sieve activated powder.

[0011] Further, the step S1 of the present application comprises heating and activating under normal pressure or vacuum condition for 2-24h; preferably heating and activating under vacuum condition. The heating temperature under normal pressure is 300-550℃; the heating temperature under vacuum condition is 150-250℃. Specifically, the heating and activating time can be but not limited to 2h, 4h, 6h, 8h, 12h, 14h, 16h, 18h, 20h, 22h, 23h, 24h; the heating and activating time is preferably 5-18h, more preferably 6-10h. Specifically, the heating temperature under normal pressure can be but not limited to 300℃, 350℃, 370℃, 400℃, 440℃, 480℃, 500℃, 520℃, 550℃; the heating temperature under normal pressure is preferably 325-500℃, more preferably 350-400℃. Specifically, the heating temperature under vacuum condition can be but not limited to 150℃, 180℃, 210℃, 230℃, 250℃; the heating temperature under vacuum condition is preferably 150-200℃; the heating temperature under vacuum condition is more preferably 150-180℃.

[0012] Further, the pressure of CO2 atmosphere in step S2 of the present application is 1-15bar, and the time of tumble stirring is 0.5-12h. Specifically, the pressure of CO2 atmosphere can be but not limited to 1bar, 3bar, 5bar, 7bar, 9bar, 11bar, 13bar, 15bar; the pressure of CO2 atmosphere is preferably 2-12bar, more preferably 5-10bar.

[0013] Specifically, the time of tumble stirring can be but not limited to 0.5h, 1h, 2h, 2.5h, 3.4h, 4.2h, 5.5h, 7.1h, 8h, 9.5h, 10h, 12h; the time of tumble stirring is preferably 0.5-8h, more preferably 0.5-3h.

[0014] Further, step S2 of the present application is carried out at normal temperature; normal temperature usually refers to 10-30℃.

[0015] Further, the high molecular polymer of the present application is a thermosetting resin and a curing agent, and the thermosetting resin is at least one of an epoxy resin, chitosan and polydimethylsiloxane. Specifically, the dispersing of the carrier powder adsorbed with CO2 in the liquid high molecular polymer in step S3 comprises: adding the carrier powder adsorbed with CO2 into the thermosetting resin and stirring to make the carrier powder adsorbed with CO2 uniformly dispersed in the thermosetting resin, and then adding the curing agent and continuing to stir to make the curing agent fully mixed with the thermosetting resin. Specifically, the curing treatment in step S3 of the present application comprises: standing and curing at room temperature to 100℃ for 2 to 48 hours. More specifically, the curing temperature can be, but is not limited to, 18℃, 20℃, 25℃, 40℃, 50℃, 60℃, 70℃, 80℃, 90℃, 100℃; and the curing time can be, but is not limited to, 2 hours, 5 hours, 8 hours, 12 hours, 16 hours, 20 hours, 25 hours, 30 hours, 36 hours, 40 hours, 43 hours, 46 hours, 48 hours. The curing temperature is preferably room temperature (such as 18 to 25℃); and the curing time is preferably 12 to 48 hours, and more preferably 24 to 36 hours.

[0016] Further, the high molecular polymer of the present application is a thermoplastic resin, and the thermoplastic resin is at least one of cellulose acetate, polymethyl methacrylate, polyethylene, polyvinyl chloride, polyacrylonitrile, polypropylene, polystyrene, polyvinylidene fluoride and polyamide.

[0017] Further, the thermoplastic resin of the present application is at least one of polyethylene and polypropylene, and the dispersing of the carrier powder adsorbed with CO2 in the liquid high molecular polymer in step S3 comprises: heating the thermoplastic resin to a molten state in a CO2 atmosphere, and then adding the carrier powder adsorbed with CO2 and stirring to make it uniformly dispersed. Specifically, the curing treatment in step S3 of the present application comprises: cooling to room temperature.

[0018] Further, the thermoplastic resin of the present application is at least one of cellulose acetate, polymethyl methacrylate, polyvinyl chloride, polyacrylonitrile, polystyrene, polyvinylidene fluoride and polyamide, and the dispersing of the carrier powder adsorbed with CO2 in the liquid high molecular polymer in step S3 comprises: dissolving the thermoplastic resin in an organic solvent (such as acetone, DMF, THF, etc.) to form a homogeneous solution in a CO2 atmosphere, and then adding the carrier powder adsorbed with CO2 into the homogeneous solution and stirring to make it uniformly dispersed. Specifically, the curing treatment in step S3 of the present application comprises: removing the organic solvent by atmospheric distillation or reduced pressure distillation, and the atmospheric distillation is preferred.

[0019] Further, the mass ratio of the porous carrier powder to the high molecular polymer in the present application is 1:5-10:1. Specifically, the mass ratio of the porous carrier powder to the high molecular polymer can be, but is not limited to, 1:5, 1:4, 1:2, 1:1, 1:0.8, 1:0.5, 1:0.3, 1:0.2, 1:0.1. The mass ratio of the porous carrier powder to the high molecular polymer is preferably 1:1-10:1, and more preferably 5:1-10:1.

[0020] Further, the step S4 in the present application comprises pulverization by using a grinder or a pulverizer.

[0021] Further, the particle size of the CO2-generating arc extinguishing material obtained in the step S4 in the present application is 10-1000 μm; the particle size of the CO2-generating arc extinguishing material is preferably 30-500 μm, and more preferably 50-150 μm.

[0022] Correspondingly, the second aspect of the present application provides a CO2-generating arc extinguishing material, which is prepared by using the above-mentioned preparation method of the CO2-generating arc extinguishing material. When an arc occurs, the high molecular polymer in the outer layer of the CO2-generating arc extinguishing material is melted or broken by decomposition under heat, and the internally stored CO2 is released, thereby achieving a high-efficiency and rapid arc extinguishing effect.

[0023] Correspondingly, the third aspect of the present application further provides the above-mentioned CO2-generating arc extinguishing material in the application of a fuse.

[0024] Compared with the prior art, the CO2-generating arc extinguishing material in the present application can be applied to a fuse. When the fuse is fused and an arc is generated due to overload or short circuit, the high temperature of the arc will cause the polymer film layer on the surface of the CO2-generating arc extinguishing material to crack, thereby releasing the internally stored CO2 gas and achieving a rapid arc extinguishing effect. The CO2-generating arc extinguishing material can be used as an arc extinguishing medium alone, or can be used in cooperation with other arc extinguishing substances, such as being mixed with SiO2 particles, so as to improve the arc resistance by combining the insulation and cooling effects of the SiO2 particles with the gas arc extinguishing mechanism of CO2; or being added as a functional filler into arc extinguishing glue, so as to release CO2 when the glue is decomposed under heat, thereby enhancing the arc extinguishing performance of the traditional arc extinguishing glue. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a structural schematic diagram of the CO2-generating arc extinguishing material in the present application.

[0026] Figure 2 FIG. 2 is the carrier powder adsorbed with CO2 prepared in Example 1 in the present application.

[0027] Figure 3 FIG. 3 is the CO2-generating arc extinguishing material prepared in Example 1 in the present application. DETAILED DESCRIPTION

[0028] To solve the problems of high preparation and transportation cost, environmental unfriendliness and difficulty in application to small and micro electronic devices of the commonly used SF6 arc extinguishing gas, please refer to Figure 1 The application provides a CO2-generating arc extinguishing material 100, which comprises a porous carrier powder 11 and a coating layer 12, CO2 gas is adsorbed and stored in the pores inside the porous carrier powder 11, the coating layer 12 is composed of a high polymer, and the coating layer 12 is uniformly coated on the surface of the porous carrier powder 11. Specifically, the preparation of the CO2-generating arc extinguishing material 100 comprises the following steps: first, adsorbing a certain amount of CO2 by the porous carrier powder 11, and then performing surface coating by a high polymer film-forming material to form the coating layer 12. Since the CO2-generating arc extinguishing material 100 can stably store CO2 in the porous carrier powder 11, when an arc is generated in a fuse, the high temperature causes the coating layer 12 to break, and the CO2 in the porous carrier powder 11 adsorbed with CO2 is quickly released, thereby realizing efficient arc extinguishing, and the advantages of environmental protection, low cost and application to micro devices are achieved.

[0029] To better illustrate the purpose, technical scheme and beneficial effects of the application, the application will be further described below in combination with specific examples. It should be noted that the following implementation of the method is a further explanation and description of the application, and should not be regarded as a limitation of the application.

[0030] The porous carrier powder used in Examples 1 to 33 and Comparative Example 1 is 13X molecular sieve activated powder, which is purchased from Dalian Haixin Chemical Co., Ltd., has a particle size of 2 to 3 μm, and has a CO2 adsorption capacity of 170 to 180 mg / g;

[0031] Example 1

[0032] The embodiment provides a preparation method of a CO2-generating arc extinguishing material, and the steps comprise:

[0033] S1, placing the porous carrier powder in a vacuum drying box, heating at 150 DEG C under vacuum conditions for 8 h, and preparing an activated porous carrier powder;

[0034] S2, placing the activated porous carrier powder in a CO2 atmosphere (CO2 gas pressure is 5 bar) at 25 DEG C and rolling and stirring for 2 h to obtain a carrier powder adsorbed with CO2 as shown in Figure 2 ;

[0035] S3, adding the carrier powder adsorbed with CO2 into an epoxy resin (bisphenol A type epoxy resin E-51), uniformly stirring, then adding a curing agent (triethylenetetramine), uniformly stirring again, and then curing at 40 DEG C for 24 h to obtain a block, wherein the ratio of the mass of the porous carrier powder to the sum of the masses of the epoxy resin and the curing agent is 1:1, and the mass ratio of the epoxy resin to the curing agent is 10:1.

[0036] S4, the block is crushed by a crusher to obtain fine powder, and then 100 mesh and 300 mesh screen meshes are used to screen out powder particles with a particle size of 50-150 μm, to obtain a CO2 gas production arc extinguishing material as shown in Figure 3 .

[0037] Example 2

[0038] This example 2 and example 1 are basically the same, the difference between the two is only: the ratio of the mass of the porous carrier powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 2 is 2:1.

[0039] Example 3

[0040] This example 3 and example 1 are basically the same, the difference between the two is only: the ratio of the mass of the porous carrier powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 3 is 3:1.

[0041] Example 4

[0042] This example 4 and example 1 are basically the same, the difference between the two is only: the ratio of the mass of the porous carrier powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 4 is 4:1.

[0043] Example 5

[0044] This example 5 and example 1 are basically the same, the difference between the two is only: the ratio of the mass of the porous carrier powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 5 is 5:1.

[0045] Example 6

[0046] This example 6 and example 1 are basically the same, the difference between the two is only: the ratio of the mass of the porous carrier powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 6 is 6:1.

[0047] Example 7

[0048] This example 7 and example 1 are basically the same, the difference between the two is only: the ratio of the mass of the porous carrier powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 7 is 7:1.

[0049] Example 8

[0050] This example 8 and example 1 are basically the same, the difference between the two is only: the ratio of the mass of the porous carrier powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 8 is 8:1.

[0051] Example 9

[0052] This example 9 is substantially the same as example 1, with the exception that the ratio of the mass of the porous support powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 9 is 9:1.

[0053] Example 10

[0054] This example 10 is substantially the same as example 1, with the exception that the ratio of the mass of the porous support powder to the sum of the mass of the epoxy resin and the curing agent in step S3 of example 10 is 9:1.

[0055] Example 11

[0056] This example 11 is substantially the same as example 1, with the exception that the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), and the curing agent is adjusted to be the curing agent for Dow Corning DC184.

[0057] Example 12

[0058] This example 12 is substantially the same as example 2, with the exception that the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), and the curing agent is adjusted to be the curing agent for Dow Corning DC184.

[0059] Example 13

[0060] This example 13 is substantially the same as example 3, with the exception that the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), and the curing agent is adjusted to be the curing agent for Dow Corning DC184.

[0061] Example 14

[0062] This example 14 is substantially the same as example 4, with the exception that the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), and the curing agent is adjusted to be the curing agent for Dow Corning DC184.

[0063] Example 15

[0064] This example 15 is substantially the same as example 5, with the exception that the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), and the curing agent is adjusted to be the curing agent for Dow Corning DC184.

[0065] Example 16

[0066] This example 16 and example 6 are basically the same, the difference between the two is only: the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), the curing agent is adjusted to the curing agent matched with Dow Corning DC184.

[0067] Example 17

[0068] This example 17 and example 7 are basically the same, the difference between the two is only: the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), the curing agent is adjusted to the curing agent matched with Dow Corning DC184.

[0069] Example 18

[0070] This example 18 and example 8 are basically the same, the difference between the two is only: the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), the curing agent is adjusted to the curing agent matched with Dow Corning DC184.

[0071] Example 19

[0072] This example 19 and example 9 are basically the same, the difference between the two is only: the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), the curing agent is adjusted to the curing agent matched with Dow Corning DC184.

[0073] Example 20

[0074] This example 20 and example 10 are basically the same, the difference between the two is only: the epoxy resin (bisphenol A type epoxy resin E-51) is replaced by polydimethylsiloxane (Dow Corning DC184), the curing agent is adjusted to the curing agent matched with Dow Corning DC184.

[0075] Example 21

[0076] The present embodiment provides a preparation method of CO2 gas production arc extinguishing material, the steps comprising:

[0077] S1, the porous carrier powder is placed in a vacuum drying box, heated at 150℃ under vacuum condition for 8h, and the activated porous carrier powder is prepared;

[0078] S2, the activated porous carrier powder is placed in CO2 atmosphere (CO2 gas pressure is 5bar) at 25℃ and rolled and stirred for 2h to obtain the carrier powder adsorbed with CO2;

[0079] S3. Under a CO2 atmosphere at 25°C, cellulose acetate is dissolved in acetone (the mass-to-volume ratio of cellulose acetate to acetone is 1g:30mL), and stirred until homogeneous to obtain an acetone solution of cellulose acetate; then, under a CO2 atmosphere at 25°C, carrier powder adsorbed with CO2 is added to the acetone solution of cellulose acetate and stirred until homogeneous; then, CO2 gas is introduced into the mixture and it is heated at 60°C with stirring until all the acetone evaporates to obtain a block, wherein the mass ratio of the porous carrier powder to the mass of cellulose acetate is 1:1;

[0080] S4. The block material is crushed into fine powder using a pulverizer, and then the powder particles with a particle size of 50~150μm are sieved through 100 mesh and 300 mesh screens in sequence to obtain CO2 gas generation arc extinguishing material.

[0081] Example 22

[0082] This embodiment 22 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 22 is 2:1.

[0083] Example 23

[0084] This embodiment 23 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 23 is 3:1.

[0085] Example 24

[0086] This embodiment 24 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 24 is 4:1.

[0087] Example 25

[0088] This embodiment 25 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 25 is 5:1.

[0089] Example 26

[0090] This embodiment 26 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 26 is 6:1.

[0091] Example 27

[0092] This embodiment 27 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 27 is 7:1.

[0093] Example 28

[0094] This embodiment 28 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 28 is 8:1.

[0095] Example 29

[0096] This embodiment 29 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 29 is 9:1.

[0097] Example 30

[0098] This embodiment 30 is basically the same as embodiment 21, except that the ratio of the mass of the porous carrier powder to the mass of cellulose acetate in step S3 of embodiment 30 is 10:1.

[0099] Example 31

[0100] This embodiment 31 provides an arc-extinguishing material, which is prepared by uniformly mixing the CO2 gas-generating arc-extinguishing material obtained in embodiment 10 with SiO2 solid particles with a particle size of 50~150μm at a mass ratio of 1:1.

[0101] Example 32

[0102] This embodiment 32 provides an arc-extinguishing material, which is prepared by uniformly mixing the CO2 gas-generating arc-extinguishing material obtained in embodiment 20 with SiO2 solid particles with a particle size of 50~150μm at a mass ratio of 1:1.

[0103] Example 33

[0104] This embodiment 33 provides an arc-extinguishing material, which is prepared by uniformly mixing the CO2 gas-generating arc-extinguishing material obtained in embodiment 30 with SiO2 solid particles with a particle size of 50~150μm at a mass ratio of 1:1.

[0105] Comparative Example 1

[0106] This comparative example is basically the same as Example 1, except that: Comparative Example 1 omits step S2 and step S3 includes adding the activated porous carrier powder obtained in step S1 into the epoxy resin.

[0107] Comparative Example 2

[0108] This comparative example provides an arc-quenching material, which is SiO2 solid particles with a particle size of 50~150μm.

[0109] Comparative Example 3

[0110] This comparative example is basically the same as Example 1, except that the porous carrier powder used in Comparative Example 3 is porous carbon black powder with a particle size of 1~10μm and a CO2 adsorption capacity of 10~30mg / g.

[0111] The arc-extinguishing materials of Examples 1 to 33 and Comparative Examples 1 to 3 were poured into the fuse and the arc-extinguishing materials were coated on the alloy melt of the fuse; the rated voltage of the fuse was 150VDC and the rated current was 200A.

[0112] The above-mentioned fuses were tested for arc suppression performance according to standards GB / T31465 2015 and GB / T31465 2017. The testing instruments included a short-circuit test platform (DL10KV 100), a megohmmeter (AR3127), a DC programmable power supply (IT6932A), and a 6.5-digit multimeter (34401A); the ambient temperature was 20.6℃ and the humidity was 46%RH. In Comparative Example 3, combustion occurred when an arc was generated, leading to fuse damage; the arcing times of the fuses in Examples 1 to 33 and Comparative Examples 1 to 2 are shown in Table 1.

[0113] Table 4 Arc Time Test of Fuses

[0114]

[0115] As shown in Table 1, compared with Comparative Examples 1 to 2, the arc-extinguishing materials of Examples 1 to 30 have excellent arc-extinguishing performance. This is because the present invention uses porous carrier powder to adsorb and solidify CO2, and then uses a polymer film-forming material to coat the surface of the porous carrier, thereby achieving CO2 sequestration and significantly improving the stability and long-term storage of the CO2-generating arc-extinguishing material. When an electric arc occurs, the polymer coating on the surface of the porous carrier melts or decomposes and breaks down due to heat, and the CO2 adsorbed inside the porous carrier is released instantaneously due to heat. The CO2 release rate matches the arc energy release, thereby achieving a highly efficient and rapid arc-extinguishing effect.

[0116] Comparing Comparative Example 2 with Examples 31-33, it can be seen that the arc extinguishing performance of the arc extinguishing materials in Examples 31-33 is significantly improved. This indicates that using the CO2 gas-generating arc extinguishing material of the present invention in combination with the traditional SiO2 arc extinguishing material can significantly improve the arc extinguishing performance of the SiO2 arc extinguishing material.

[0117] As can be seen from the comparison between Comparative Example 3 and Example 1, using porous carbon black powder as a porous carrier powder cannot achieve a good arc extinguishing effect. This also shows that not all porous carrier powders that can adsorb carbon dioxide can achieve a high-efficiency and rapid arc extinguishing effect.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, it is not limited to those listed in the embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for preparing a CO2-generating arc-extinguishing material, characterized in that the steps include... include: S1. The porous carrier powder is heated and activated to obtain activated porous carrier powder; S2. The activated porous carrier powder is placed in a CO2 atmosphere and tumbled and stirred to obtain carrier powder adsorbed with CO2. S3. The carrier powder adsorbed with CO2 is dispersed in a liquid polymer and then solidified to obtain a block. S4. The block material is crushed and then screened to obtain CO2 gas-generating arc-extinguishing material; The porous carrier powder is 13X molecular sieve activated powder; The polymer is a thermosetting resin and a curing agent, wherein the thermosetting resin is at least one of epoxy resin and polydimethylsiloxane; or the polymer is a thermoplastic resin, wherein the thermoplastic resin is selected from at least one of cellulose acetate, polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyvinylidene fluoride and polyamide. The mass ratio of the porous carrier powder to the polymer is 1:1 to 10:1; The pressure of the CO2 atmosphere in step S2 is 5~15 bar, and the tumbling and stirring time is 0.5~12 h.

2. The preparation method of the CO2-generating arc-extinguishing material as described in claim 1, characterized in that, The porous carrier powder has a particle size of 200 nm to 100 μm.

3. The preparation method of the CO2-generating arc-extinguishing material as described in claim 1, characterized in that, Step S1 includes heating and activating under normal pressure or vacuum conditions for 2-24 hours; the heating temperature under normal pressure conditions is 300-550℃; the heating temperature under vacuum conditions is 150-250℃.

4. A CO2-generating arc-quenching material, characterized in that, It is prepared by the method for preparing CO2 gas-generating arc-extinguishing material as described in any one of claims 1 to 3.

5. The application of the CO2-generating arc-extinguishing material prepared by the method of any one of claims 1 to 3, or the CO2-generating arc-extinguishing material as described in claim 4, in a fuse.

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