阅读说明：本技术 一种矿用隔爆设备的灌封方法 (Encapsulation method of mining explosion-proof equipment ) 是由 慕振国 王涛 崔营营 李家岩 刘会祥 李培迎 朱沛琦 于 2021-10-19 设计创作，主要内容包括：本申请公开了一种矿用隔爆设备的灌封方法,属于矿用隔爆领域,包括以下步骤：(1)将黑色流体状的双组分酚醛环氧树脂和黑色流体状的环氧树脂固化剂两种组分分别放入温度为50℃～60℃,湿度为2～5％的温箱中加热15～20分钟,取出后按照5:(1～3)质量比放入容器中进行充分混合,充分搅拌10～15分钟,待两种组分充分混合后,在室温下静置30-50分钟,形成流体状硬胶等共14个步骤；该方法通过制备硬胶壳体,再使用硬胶、软胶及防爆颗粒灌封电子设备,使得隔爆外壳轻量化、绝缘效果好,同时隔爆效果好、强度高,能够满足煤矿等恶劣环境下的使用条件。(The application discloses a potting method of a mining explosion-proof device, which belongs to the field of mining explosion-proof and comprises the following steps: (1) respectively putting two components of black fluid-shaped bi-component novolac epoxy resin and black fluid-shaped epoxy resin curing agent into a warm box with the temperature of 50-60 ℃ and the humidity of 2-5%, heating for 15-20 minutes, taking out, putting into a container according to the mass ratio of 5 (1-3), fully mixing, fully stirring for 10-15 minutes, standing for 30-50 minutes at room temperature after the two components are fully mixed, and forming fluid hard glue; according to the method, the hard rubber shell is prepared, and then the hard rubber, the soft rubber and the explosion-proof particles are used for encapsulating the electronic equipment, so that the explosion-proof shell is light in weight, good in insulation effect, good in explosion-proof effect and high in strength, and can meet the use conditions in severe environments such as coal mines.)

1. The encapsulating method of the mining explosion-proof equipment is characterized by comprising the following steps:

(1) placing two components of black fluid-shaped bi-component novolac epoxy resin and black fluid-shaped epoxy resin curing agent into a warm box with the temperature of 50-60 ℃ and the humidity of 2-5% respectively, heating for 15-20 minutes, taking out, placing into a container according to the mass ratio of 5 (1-3), fully mixing, fully stirring for 10-15 minutes, and standing for 30-50 minutes at room temperature after the two components are fully mixed to form a fluid hard adhesive;

(2) adding a hard glue toughening agent accounting for 0.8-1.2% of the mass of the hard glue into the fluid hard glue, fully stirring for 10-15 minutes, and standing for 20-40 minutes at room temperature;

(3) encapsulating the hard glue into a mold, vibrating the mold at high frequency for 5-10 minutes, and standing for 30-36 hours at room temperature until the hard glue is completely solidified to form a hard glue shell;

(4) removing the die, putting the hard rubber shell into a temperature box with the temperature of 60-70 ℃ and the humidity of 5-7%, heating for 0.5-1 hour, and then standing for 10-15 hours at room temperature;

(5) placing the electronic equipment in a first cleaning solution, vibrating at high frequency for 10-15 minutes, taking out, standing at room temperature for 15-20 minutes, then placing the electronic equipment in a second cleaning solution, vibrating at high frequency for 10-15 minutes, taking out, and standing at room temperature for 20-40 minutes;

(6) putting two components of black fluid double-component addition type encapsulation silica gel and white fluid silica gel curing agent into a container according to the mass ratio of 1 (1-3), fully mixing, fully stirring for 10-15 minutes, standing for 30-50 minutes at room temperature after the two components are fully mixed, and forming mixed fluid soft gel;

(7) adding a soft rubber catalyst accounting for 1.2-1.8% of the mass of the soft rubber into the fluid soft rubber, fully stirring for 10-15 minutes, and standing for 20-40 minutes at room temperature;

(8) placing the explosion-proof particles at the bottom of the solidified hard rubber shell, wherein the thickness of the explosion-proof particles is 3mm, placing the electronic equipment subjected to decontamination treatment on the explosion-proof particles, adding the explosion-proof particles again to completely cover the whole electronic equipment, and filling and sealing the mixed soft rubber into the hard rubber shell to enable the soft rubber to fill the gaps between the whole electronic equipment and the explosion-proof particles until all the explosion-proof particles on the surface are completely covered; the mixed soft glue is formed by mixing hard glue and soft glue, and the proportion of the hard glue to the soft glue is 1: (2-3);

(9) vibrating the hard rubber shell at high frequency for 5-10 minutes, and then standing at room temperature for 24-30 hours until the soft rubber forms an oily paste;

(10) vibrating the hard rubber shell for 10-15 minutes by using ultrasonic waves, and removing dust on the surface of the shell;

(11) preparing the fluid hard glue again according to the steps (1) to (2), encapsulating the hard glue into the hard glue shell, and completely covering the soft glue solidification surface in the cavity, wherein the thickness is not less than 3 mm;

(12) vibrating the hard rubber shell at high frequency for 5-10 minutes, taking out, and standing at room temperature for 30-36 hours until the hard rubber is completely solidified;

(13) placing the hard rubber shell into an incubator with the temperature of 60-70 ℃ and the humidity of 5% for heating for 0.5-1 hour, and then standing for 10-15 hours at room temperature;

(14) and (3) irradiating the shell for 30-45 minutes by using ultraviolet rays, and finally preparing the mining explosion-proof equipment, wherein the outer surface of the shell is made of hard glue, and the electronic equipment in the inner cavity is encapsulated by explosion-proof particles and soft glue.

2. The method of claim 1, wherein the soft gel catalyst is methylnadic anhydride and the stiff gum toughening agent is methyltetrahydrophthalic anhydride.

3. The method according to claim 2, wherein the stirring rate in the step (1), the step (2), the step (6), the step (7) and the step (11) is 120-180 r/min.

4. The method according to claim 3, wherein the high frequency vibration frequency in step (3), step (5), step (9) and step (12) is 10 KHz.

5. The method of claim 4, wherein the first cleaning agent is one or more of trichloroethylene, hexane, heptane, diglyme, isopropanol, and butanediol; the second cleaning agent is absolute ethyl alcohol.

6. The method of claim 5, wherein the blast-resistant particles are prepared from a first component, a second component, and a binder; the first component comprises aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride; the second component comprises sodium hydroxide and aluminum hydroxide;

the mass ratio of the first component to the second component is 1 (8-12).

7. The method according to claim 6, wherein the mass ratio of the aluminum oxide, the magnesium oxide, the zinc oxide and the aluminum nitride in the first component is 2:2:2:1, and the mass ratio of the sodium hydroxide and the aluminum hydroxide in the second component is 1: 1;

the adhesive is an emulsion adhesive prepared by mixing vinyl acetate resin and acrylic resin, and the mass ratio of the vinyl acetate resin to the acrylic resin is 1: 1.5.

8. The method according to claim 7, wherein the explosion-proof granules are round granules with a diameter of 2mm and a density of 2.85 kg/l.

9. The method according to claim 8, wherein a quartz mercury lamp is used as the ultraviolet light source, the voltage is 220V, and the current intensity is 2.5A.

10. The method according to claim 9, wherein the device contained in the housing of the electronic device is a circuit board or an electronic device, and the hard glue and the soft glue completely seal the circuit board or the electronic device into the hard glue housing, so as to achieve effective encapsulation protection for the circuit board or the electronic device, and the functions of explosion prevention, water prevention, dust prevention and shock prevention.

Technical Field

The application relates to an encapsulating method of a mining explosion-proof device, and belongs to the field of mining explosion-proof.

Background

With the development of modern technology, some high-tech electronic products are used more and more in the field of coal mines, and how to safely and efficiently use the electronic products is concerned by people. Because the coal mine environment is comparatively abominable, and the operation requirement to electronic equipment is very harsh, and coal mine workspace is the comparatively airtight environment in underground, the narrow and small environment in space mostly, and dark moist, be full of the dust, and electronic equipment is in the life of this kind of environment can be serious for a long time, and some equipment directly suffers the damage, can't use. More serious, the working area is filled with combustible gas and dust, so that explosion can be caused to cause a devastating disaster once exposed fire or high temperature and the like are met.

At present, electronic equipment used in coal mines is subjected to explosion-proof protection, and general explosion-proof equipment is intrinsic safety equipment or explosion-proof equipment. Intrinsic safety type products are widely used along with the application of embedded products, and some circuits are sealed according to requirements. At present, current flame proof shell uses the steel sheet, and the size is big, heavy, very heavy, has the shielding influence to radio signal, is unfavorable for very much using extensive wireless communication equipment now, and the fixed difficulty of equipment fixing, occupation space is big, and adverse factor such as wiring is complicated has seriously hindered the use and the development of colliery electronic product.

When electronic equipment is used in such a severe environment, protection of the electronic equipment must be done. Under such circumstances, there are currently four difficulties:

1. aiming at the defects of large size, heavy weight and poor insulativity of the explosion-proof shell of the existing equipment, how to miniaturize, lighten and have good insulation effect and convenient carrying by using the shell;

2. under the environmental conditions of more combustible gas and dust, how to prevent electronic equipment, batteries and the like from causing danger even if explosion occurs;

3. considering the collision impact in the working area and the huge impact force generated when the equipment and the battery inside the shell explode, the hardness of the equipment shell reaches the standard;

4. when the three signals reach the standard, the signal attenuation of the electronic equipment is reduced to the maximum extent, and the wireless transmission of data cannot be influenced.

Disclosure of Invention

In order to solve the problems, the method for encapsulating the mining explosion-proof equipment is provided, the hard rubber shell is prepared, and then the electronic equipment is encapsulated by the hard rubber, the soft rubber and the explosion-proof particles, so that the explosion-proof shell is light in weight and good in insulation effect, meanwhile, the explosion-proof effect is good, the strength is high, and the using conditions under severe environments such as coal mines can be met.

According to one aspect of the application, the encapsulating method of the mining explosion-proof equipment comprises the following steps:

(1) placing two components of black fluid-shaped bi-component novolac epoxy resin and black fluid-shaped epoxy resin curing agent into a warm box with the temperature of 50-60 ℃ and the humidity of 2-5% respectively, heating for 15-20 minutes, taking out, placing into a container according to the mass ratio of (5) - (1-3) for fully mixing, fully stirring clockwise for 10-15 minutes by using a stirrer, and standing for 30-50 minutes at room temperature after the two components are fully mixed to form a fluid hard adhesive;

(2) adding a hard glue toughening agent accounting for 0.8-1.2% of the mass of the hard glue into the fluid hard glue, fully stirring for 10-15 minutes clockwise by using a stirrer, and standing for 20-40 minutes at room temperature;

(3) encapsulating the hard glue into a mold with an embedded cavity and an opening on one side, fixing the mold to a high-frequency vibrator, vibrating at high frequency for 5-10 minutes, and standing at room temperature for 30-36 hours until the hard glue is completely solidified to form a hard glue shell;

(4) removing the die, putting the hard rubber shell into a temperature box with the temperature of 60-70 ℃ and the humidity of 5-7%, heating for 0.5-1 hour, and then standing for 10-15 hours at room temperature;

(5) fixing the electronic equipment on a high-frequency vibrator, placing the electronic equipment in a first cleaning solution, vibrating the electronic equipment at high frequency for 10-15 minutes, taking out the electronic equipment, standing the electronic equipment for 15-20 minutes at room temperature, then placing the electronic equipment in a second cleaning solution, vibrating the electronic equipment at high frequency for 10-15 minutes, taking out the electronic equipment, and standing the electronic equipment for 20-40 minutes at room temperature;

(6) putting two components of black fluid double-component addition type encapsulation silica gel and white fluid silica gel curing agent into a container according to the mass ratio of 1 (1-3) for fully mixing, fully stirring clockwise for 10-15 minutes by using a stirrer, and standing for 30-50 minutes at room temperature after the two components are fully mixed to form mixed fluid soft gel;

(7) adding a soft rubber catalyst accounting for 1.2-1.8% of the mass of the soft rubber into the fluid soft rubber, fully stirring the mixture clockwise for 10-15 minutes by using a stirrer, and standing the mixture for 20-40 minutes at room temperature;

(8) placing the explosion-proof particles at the bottom of the solidified hard rubber shell, wherein the thickness of the explosion-proof particles is 3mm, placing the electronic equipment subjected to decontamination treatment on the explosion-proof particles, adding the explosion-proof particles again to completely cover the whole electronic equipment, and filling and sealing the mixed soft rubber into the hard rubber shell to enable the soft rubber to fill the gaps between the whole electronic equipment and the explosion-proof particles until all the explosion-proof particles on the surface are completely covered; the mixed soft glue is formed by mixing hard glue and soft glue, and the proportion of the hard glue to the soft glue is 1: (2-3);

(9) placing the hard rubber shell on a high-frequency vibrator, vibrating for 5-10 minutes at high frequency, and then standing for 24-30 hours at room temperature until the soft rubber forms an oily paste;

(10) vibrating the hard rubber shell for 10-15 minutes by using ultrasonic waves, and removing dust on the surface of the shell;

(11) preparing the fluid hard glue again according to the steps (1) to (2), encapsulating the hard glue into the hard glue shell, and completely covering the soft glue solidification surface in the cavity, wherein the thickness is not less than 3 mm;

(12) placing the hard rubber shell on a high-frequency vibrator, vibrating for 5-10 minutes at high frequency, taking out, and standing for 30-36 hours at room temperature until the hard rubber is completely solidified;

(13) placing the hard rubber shell into an incubator with the temperature of 60-70 ℃ and the humidity of 5% for heating for 0.5-1 hour, and then standing for 10-15 hours at room temperature;

(14) and (3) irradiating the shell for 30-45 minutes by using ultraviolet rays, and finally preparing the mining explosion-proof equipment, wherein the outer surface of the shell is made of hard glue, and the electronic equipment in the inner cavity is encapsulated by explosion-proof particles and soft glue.

Optionally, the soft gel catalyst is methyl nadic anhydride, and the hard gel toughening agent is methyl tetrahydrophthalic anhydride.

Optionally, the speed of the stirrer in the step (1), the step (2), the step (6), the step (7) and the step (11) is 120-180 r/min.

Optionally, the frequency of the high-frequency vibrator in the step (3), the step (5), the step (9) and the step (12) is 10 KHz.

Optionally, the first cleaning agent is one or more of trichloroethylene, hexane, heptane, diethylene glycol dimethyl ether, isopropyl alcohol and butanediol; the second cleaning agent is absolute ethyl alcohol.

Optionally, the explosion-proof particles are prepared from a first component, a second component and a binder; the first component comprises aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride; the second component comprises sodium hydroxide and aluminum hydroxide;

the mass ratio of the first component to the second component is 1 (8-12).

Optionally, the mass ratio of aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride in the first component is 2:2:2:1, and the mass ratio of sodium hydroxide and aluminum hydroxide in the second component is 1: 1;

the adhesive is an emulsion adhesive prepared by mixing vinyl acetate resin and acrylic resin, and the mass ratio of the vinyl acetate resin to the acrylic resin is 1: 1.5.

Optionally, the explosion-proof particles are round particles with a diameter of 2mm and a density of 2.85 kg/l.

Alternatively, a quartz mercury lamp was used as the ultraviolet light source, the voltage was 220V, and the current intensity was 2.5A.

Optionally, the device mounted in the casing of the electronic device is a circuit board or an electronic device, and the hard glue and the soft glue completely seal the circuit board or the electronic device into the hard glue casing, so as to perform effective encapsulation protection on the circuit board or the electronic device, and the functions of explosion prevention, water prevention, dust prevention and shock prevention.

In the present application, "room temperature" means 25 ℃.

Benefits of the present application include, but are not limited to:

1. according to the encapsulation method of the mining explosion-proof equipment, the shell encapsulated by the method is high in hardness, small in size, light in weight, small in signal attenuation, good in insulation effect, high in flame-retardant and anti-static performance, convenient to carry, small in influence of pulling force or pushing force generated by encapsulation on the equipment, and capable of effectively prolonging the service life of the equipment; the strength of the shell can be further improved through twice heating and curing in the steps (4) and (13), bubbles in the glue are removed through high-frequency vibration in the step (3), the strength of the glue is improved, and air holes in the glue are avoided.

2. According to the encapsulation method of the mining explosion-proof equipment, the mining explosion-proof equipment prepared by the method can rapidly and effectively absorb generated sparks, gas and released heat when equipment or batteries in the shell explode, meets the national explosion-proof standard (GB3836) of the mining equipment, and guarantees the personal safety of workers.

3. According to the encapsulating method of the mining explosion-proof equipment, the shell hardness can reach Shore hardness not less than 98D by using the double encapsulating process of hard glue and soft glue, the resistance to external impact, vibration and explosion impact of internal equipment is further improved, the inner cavity is wrapped and encapsulated by high-temperature-resistant oily soft glue and explosion-proof particles, the influence of the glue on electronic devices is reduced to the greatest extent, and the service life is prolonged.

4. According to the encapsulation method of the mining explosion-proof equipment, the prepared explosion-proof particles are high in impact strength, high-temperature resistant and good in buffering performance by limiting the raw material components and the proportion of the explosion-proof particles.

5. According to the encapsulation method of the mining explosion-proof equipment, the ratio of the hard glue to the soft glue in the mixed soft glue and the adding ratio of the hard glue toughening agent and the soft glue catalyst are limited, so that the wireless signal attenuation of the electronic equipment is minimum, the radiation power is maximum, and the transmission distance is farthest.

6. The encapsulation method of the mining explosion-proof equipment can meet the requirements of electronic products on explosion resistance, water resistance, dust prevention, shock absorption, sealing, insulation, light weight, miniaturization, high strength, small signal attenuation, flame retardance, static resistance, environmental adaptability and the like, has very reliable service performance and perfect safety performance, and can be applied to battery encapsulation, antenna encapsulation, circuit board encapsulation and the like.

Detailed Description

The present application will be described in detail with reference to examples, but the present application is not limited to these examples.

Unless otherwise specified, the raw materials and catalysts in the examples of the present application, such as potting silicone, silicone curing agent, two-component novolac epoxy resin, epoxy resin curing agent, etc., were commercially available as conventional commercial products.

Unless otherwise indicated, the detection methods and apparatuses in the embodiments of the present application are all apparatuses and methods commonly used in the art, such as testing of parameters such as signal output power, radiation power, communication distance, viscosity, resistance, hardness, and strength.

Embodiment 1 preparation of mining explosion-proof equipment 1#

The encapsulating method comprises the following steps:

(1) respectively putting two components of black fluid-shaped bi-component novolac epoxy resin and black fluid-shaped epoxy resin curing agent into a temperature box with the temperature of 50 ℃ and the humidity of 2%, heating for 15 minutes, taking out, putting into a container according to the mass ratio of 5:1, fully mixing, fully stirring clockwise for 10 minutes by using a stirrer, and standing for 30 minutes at room temperature after the two components are fully mixed to form fluid hard glue;

(2) adding a hard adhesive toughening agent accounting for 1% of the mass of the hard adhesive into the fluid hard adhesive, fully stirring the mixture clockwise for 10 minutes by using a stirrer, and standing the mixture for 20 minutes at room temperature;

(3) encapsulating the hard glue into a mold with an embedded cavity and an opening on one side, fixing the mold on a high-frequency vibrator, vibrating at high frequency for 5 minutes, and standing at room temperature for 30 hours until the hard glue is completely solidified to form a hard glue shell;

(4) removing the die, putting the hard rubber shell into an incubator with the temperature of 60 ℃ and the humidity of 5%, heating for 0.5 hour, and then standing for 10 hours at room temperature;

(5) fixing the electronic equipment on a high-frequency vibrator, placing the electronic equipment in the first cleaning solution, vibrating the electronic equipment at high frequency for 10 minutes, taking the electronic equipment out, standing the electronic equipment at room temperature for 15 minutes, then placing the electronic equipment in the second cleaning solution, vibrating the electronic equipment at high frequency for 10 minutes, taking the electronic equipment out, and standing the electronic equipment at room temperature for 20 minutes;

(6) putting two components of black fluid double-component addition type encapsulation silica gel and white fluid silica gel curing agent into a container according to the mass ratio of 1:1 for fully mixing, fully stirring clockwise for 10 minutes by using a stirrer, and standing for 30 minutes at room temperature after the two components are fully mixed to form mixed fluid soft gel;

(7) adding a soft gum catalyst accounting for 1.5 percent of the mass of the soft gum into the fluid soft gum, fully stirring the mixture clockwise for 10 minutes by using a stirrer, and standing the mixture for 20 minutes at room temperature;

(8) placing the explosion-proof particles at the bottom of the solidified hard rubber shell, wherein the thickness of the explosion-proof particles is 3mm, placing the electronic equipment subjected to decontamination treatment on the explosion-proof particles, adding the explosion-proof particles again to completely cover the whole electronic equipment, and filling and sealing the mixed soft rubber into the hard rubber shell to enable the soft rubber to fill the gaps between the whole electronic equipment and the explosion-proof particles until all the explosion-proof particles on the surface are completely covered; the mixed soft glue is formed by mixing hard glue and soft glue, and the proportion of the hard glue to the soft glue is 1: 2.5;

(9) placing the hard rubber shell on a high-frequency vibrator, vibrating for 5 minutes at high frequency, and then standing for 24 hours at room temperature until the soft rubber forms an oily paste state;

(10) vibrating the hard rubber shell for 10 minutes by using ultrasonic waves to remove dust on the surface of the shell;

(11) preparing the fluid hard glue again according to the steps (1) to (2), encapsulating the hard glue into the hard glue shell, and completely covering the soft glue solidification surface in the cavity with the thickness of 3 mm;

(12) placing the hard rubber shell on a high-frequency vibrator, vibrating for 5 minutes at high frequency, taking out, and standing for 30 hours at room temperature until the hard rubber is completely solidified;

(13) placing the hard rubber shell into an incubator with the temperature of 60 ℃ and the humidity of 5% to be heated for 0.5 hour, and then standing for 10 hours at room temperature;

(14) irradiating the shell for 30 minutes by using ultraviolet rays, and finally preparing a mining explosion-proof device 1# in which the outer surface of the shell is made of hard glue and the electronic device in the inner cavity is encapsulated by explosion-proof particles and soft glue;

wherein the soft rubber catalyst is methyl nadic anhydride, and the hard rubber toughening agent is methyl tetrahydrophthalic anhydride;

the speed of the stirrer in the step (1), the step (2), the step (6), the step (7) and the step (11) is 120 r/min; the frequency of the high-frequency vibrator in the steps (3), (5), (9) and (12) is 10 KHz; the first cleaning agent is trichloroethylene; the second cleaning agent is absolute ethyl alcohol;

the explosion-proof particles are prepared from a first component, a second component and an adhesive; the first component comprises aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride; the second component comprises sodium hydroxide and aluminum hydroxide; the mass ratio of the first component to the second component is 1: 10; the mass ratio of aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride in the first component is 2:2:2:1, and the mass ratio of sodium hydroxide to aluminum hydroxide in the second component is 1: 1;

the adhesive is an emulsion adhesive prepared by mixing vinyl acetate resin and acrylic resin, and the mass ratio of the vinyl acetate resin to the acrylic resin is 1: 1.5;

the explosion-proof particles are round particles with the diameter of 2mm and the density of 2.85 kg/l; a quartz mercury lamp was used as an ultraviolet light source, the voltage was 220V, and the current intensity was 2.5A.

Embodiment 2 preparation of mining explosion-proof equipment 2#

The encapsulating method comprises the following steps:

(1) respectively placing two components of black fluid-shaped double-component novolac epoxy resin and black fluid-shaped epoxy resin curing agent into a temperature box with the temperature of 55 ℃ and the humidity of 3% to heat for 18 minutes, taking out the two components, placing the two components into a container according to the mass ratio of 5:2 to fully mix, fully stirring the two components clockwise by using a stirrer for 13 minutes, and standing the two components at room temperature for 40 minutes after the two components are fully mixed to form fluid hard glue;

(2) adding a hard glue toughening agent accounting for 0.8 percent of the mass of the hard glue into the fluid hard glue, fully stirring the mixture clockwise for 12 minutes by using a stirrer, and standing the mixture for 30 minutes at room temperature;

(3) encapsulating the hard glue into a mold with an embedded cavity and an opening on one side, fixing the mold to a high-frequency vibrator, vibrating at high frequency for 8 minutes, and standing at room temperature for 32 hours until the hard glue is completely solidified to form a hard glue shell;

(4) removing the die, putting the hard rubber shell into an incubator with the temperature of 65 ℃ and the humidity of 6 percent, heating for 0.6 hour, and then standing for 12 hours at room temperature;

(5) fixing the electronic equipment on a high-frequency vibrator, placing the electronic equipment in the first cleaning solution, vibrating the electronic equipment at high frequency for 10 minutes, taking the electronic equipment out, standing the electronic equipment at room temperature for 15 minutes, then placing the electronic equipment in the second cleaning solution, vibrating the electronic equipment at high frequency for 10 minutes, taking the electronic equipment out, and standing the electronic equipment at room temperature for 30 minutes;

(6) putting two components of black fluid double-component addition type encapsulation silica gel and white fluid silica gel curing agent into a container according to the mass ratio of 1:2 for fully mixing, fully stirring clockwise for 10 minutes by using a stirrer, and standing for 40 minutes at room temperature after the two components are fully mixed to form mixed fluid soft gel;

(7) adding a soft gum catalyst accounting for 1.2 percent of the mass of the soft gum into the fluid soft gum, fully stirring the mixture clockwise for 10 minutes by using a stirrer, and standing the mixture for 30 minutes at room temperature;

(8) placing the explosion-proof particles at the bottom of the solidified hard rubber shell, wherein the thickness of the explosion-proof particles is 3mm, placing the electronic equipment subjected to decontamination treatment on the explosion-proof particles, adding the explosion-proof particles again to completely cover the whole electronic equipment, and filling and sealing the mixed soft rubber into the hard rubber shell to enable the soft rubber to fill the gaps between the whole electronic equipment and the explosion-proof particles until all the explosion-proof particles on the surface are completely covered; the mixed soft glue is formed by mixing hard glue and soft glue, and the proportion of the hard glue to the soft glue is 1: 2;

(9) placing the hard rubber shell on a high-frequency vibrator, vibrating for 8 minutes at high frequency, and then standing for 26 hours at room temperature until the soft rubber forms an oily paste state;

(10) vibrating the hard rubber shell for 12 minutes by using ultrasonic waves to remove dust on the surface of the shell;

(11) preparing the fluid hard glue again according to the steps (1) to (2), encapsulating the hard glue into the hard glue shell, and completely covering the soft glue solidification surface in the cavity with the thickness of 3 mm;

(12) placing the hard rubber shell on a high-frequency vibrator, vibrating for 8 minutes at high frequency, taking out, and standing for 32 hours at room temperature until the hard rubber is completely solidified;

(13) placing the hard rubber shell into an incubator with the temperature of 65 ℃ and the humidity of 5 percent to be heated for 0.5 hour, and then standing for 12 hours at room temperature;

(14) irradiating for 35 minutes by using ultraviolet rays, and finally preparing a mining explosion-proof device 2# in which the outer surface of the shell is made of hard glue and the electronic device in the inner cavity is encapsulated by explosion-proof particles and soft glue;

wherein the soft rubber catalyst is methyl nadic anhydride, and the hard rubber toughening agent is methyl tetrahydrophthalic anhydride;

the speed of the stirrer in the step (1), the step (2), the step (6), the step (7) and the step (11) is 140 r/min; the frequency of the high-frequency vibrator in the steps (3), (5), (9) and (12) is 10 KHz; the first cleaning agent is hexane; the second cleaning agent is absolute ethyl alcohol;

the explosion-proof particles are prepared from a first component, a second component and an adhesive; the first component comprises aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride; the second component comprises sodium hydroxide and aluminum hydroxide; the mass ratio of the first component to the second component is 1: 8; the mass ratio of aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride in the first component is 2:2:2:1, and the mass ratio of sodium hydroxide to aluminum hydroxide in the second component is 1: 1;

the adhesive is an emulsion adhesive prepared by mixing vinyl acetate resin and acrylic resin, and the mass ratio of the vinyl acetate resin to the acrylic resin is 1: 1.5;

the explosion-proof particles are round particles with the diameter of 2mm and the density of 2.85 kg/l; a quartz mercury lamp was used as an ultraviolet light source, the voltage was 220V, and the current intensity was 2.5A.

Embodiment 3 preparation of mining explosion-proof equipment 3#

The encapsulating method comprises the following steps:

(1) respectively putting two components of black fluid-shaped bi-component novolac epoxy resin and black fluid-shaped epoxy resin curing agent into a temperature box with the temperature of 60 ℃ and the humidity of 5% for heating for 20 minutes, taking out the two components, putting the two components into a container according to the mass ratio of 5:3 for fully mixing, fully stirring the two components clockwise by using a stirrer for 15 minutes, and standing the two components for 50 minutes at room temperature after the two components are fully mixed to form fluid hard glue;

(2) adding a hard adhesive toughening agent accounting for 1.2 percent of the mass of the hard adhesive into the fluid hard adhesive, fully stirring the mixture clockwise for 15 minutes by using a stirrer, and standing the mixture for 40 minutes at room temperature;

(3) encapsulating the hard glue into a mold with an embedded cavity and an opening on one side, fixing the mold to a high-frequency vibrator, vibrating at high frequency for 10 minutes, and standing at room temperature for 36 hours until the hard glue is completely solidified to form a hard glue shell;

(4) removing the die, putting the hard rubber shell into an incubator with the temperature of 70 ℃ and the humidity of 7%, heating for 1 hour, and then standing for 15 hours at room temperature;

(5) fixing the electronic equipment on a high-frequency vibrator, placing the electronic equipment in the first cleaning solution, vibrating the electronic equipment for 15 minutes at high frequency, taking the electronic equipment out, standing the electronic equipment for 20 minutes at room temperature, then placing the electronic equipment in the second cleaning solution, vibrating the electronic equipment for 15 minutes at high frequency, taking the electronic equipment out, and standing the electronic equipment for 40 minutes at room temperature;

(6) putting two components of black fluid double-component addition type encapsulation silica gel and white fluid silica gel curing agent into a container according to the mass ratio of 1:3 for fully mixing, fully stirring clockwise for 15 minutes by using a stirrer, and standing for 50 minutes at room temperature after the two components are fully mixed to form mixed fluid soft gel;

(7) adding a soft gum catalyst accounting for 1.8 percent of the mass of the soft gum into the fluid soft gum, fully stirring the mixture clockwise for 15 minutes by using a stirrer, and standing the mixture for 40 minutes at room temperature;

(8) placing the explosion-proof particles at the bottom of the solidified hard rubber shell, wherein the thickness of the explosion-proof particles is 3mm, placing the electronic equipment subjected to decontamination treatment on the explosion-proof particles, adding the explosion-proof particles again to completely cover the whole electronic equipment, and filling and sealing the mixed soft rubber into the hard rubber shell to enable the soft rubber to fill the gaps between the whole electronic equipment and the explosion-proof particles until all the explosion-proof particles on the surface are completely covered; the mixed soft glue is formed by mixing hard glue and soft glue, and the proportion of the hard glue to the soft glue is 1: 3;

(9) placing the hard rubber shell on a high-frequency vibrator, vibrating for 10 minutes at high frequency, and then standing for 30 hours at room temperature until the soft rubber forms an oily paste state;

(10) vibrating the hard rubber shell for 15 minutes by using ultrasonic waves to remove dust on the surface of the shell;

(11) preparing the fluid hard glue again according to the steps (1) to (2), encapsulating the hard glue into the hard glue shell, and completely covering the soft glue solidification surface in the cavity with the thickness of 3 mm;

(12) placing the hard rubber shell on a high-frequency vibrator, vibrating for 10 minutes at high frequency, taking out, and standing for 36 hours at room temperature until the hard rubber is completely solidified;

(13) placing the hard rubber shell into an incubator with the temperature of 70 ℃ and the humidity of 5% for heating for 1 hour, and then standing for 15 hours at room temperature;

(14) irradiating for 45 minutes by using ultraviolet rays, and finally preparing a mining explosion-proof device 3# in which the outer surface of the shell is made of hard glue and the electronic device in the inner cavity is encapsulated by explosion-proof particles and soft glue;

wherein the soft rubber catalyst is methyl nadic anhydride, and the hard rubber toughening agent is methyl tetrahydrophthalic anhydride;

the speed of the stirrer in the step (1), the step (2), the step (6), the step (7) and the step (11) is 180 r/min; the frequency of the high-frequency vibrator in the steps (3), (5), (9) and (12) is 10 KHz; the first cleaning agent is isopropanol; the second cleaning agent is absolute ethyl alcohol;

the explosion-proof particles are prepared from a first component, a second component and an adhesive; the first component comprises aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride; the second component comprises sodium hydroxide and aluminum hydroxide; the mass ratio of the first component to the second component is 1: 12; the mass ratio of aluminum oxide, magnesium oxide, zinc oxide and aluminum nitride in the first component is 2:2:2:1, and the mass ratio of sodium hydroxide to aluminum hydroxide in the second component is 1: 1;

the adhesive is an emulsion adhesive prepared by mixing vinyl acetate resin and acrylic resin, and the mass ratio of the vinyl acetate resin to the acrylic resin is 1: 1.5;

the explosion-proof particles are round particles with the diameter of 2mm and the density of 2.85 kg/l; a quartz mercury lamp was used as an ultraviolet light source, the voltage was 220V, and the current intensity was 2.5A.

Embodiment 4 preparation and performance characterization of mining explosion-proof equipment 4# -11#

The encapsulation method of the mining explosion-proof equipment 4# -11# is different from the encapsulation method of the mining explosion-proof equipment 1# -3# in tables 1-4, and data representation of each equipment is also shown in tables 1-4.

Table 1 comparison table of encapsulation ratio test effect of hard glue and soft glue in mixed soft glue

Table 2 encapsulation ratio test effect comparison table of soft gum catalyst

TABLE 3 comparison table of encapsulation ratio test effect of ebonite flexibilizer

TABLE 4 comparison table of the test effect of the chemical component ratio in the explosion-proof particles under the same explosion condition of the electronic device in the housing

Through strict tests, when the encapsulation ratio of the hard glue to the soft glue is 1:2.5, the encapsulation ratio of the hard glue to the soft glue is higher than that of the soft glue; when the use ratio of the toughening agent is 1 percent and the use ratio of the catalyst is 1.5 percent, the wireless signal attenuation is minimum, the radiation power is maximum, and the transmission distance is farthest. Meanwhile, the shell has high strength, the hardness reaches the requirement of being more than or equal to 98D, the surface of the shell has no distortion deformation under the explosion condition of internal electronic equipment, the inner cavity explosion-proof particles prepared from the first component and the second component in a mass ratio of 1:10 can effectively absorb waste gas and heat generated by explosion, the oily soft rubber resists high temperature, sparks can be rapidly extinguished, and the explosion-proof effect can be effectively achieved. Simultaneously this application adopts double-deck embedment technology, and the leakproofness is better, and waterproof dustproof effect reaches IP69 grade, proves simultaneously that this technology is corrosion-resistant, and insulating effectual, the safety of having solved electronic equipment under the coal mine environment and using, convenient and product property ability scheduling problem.

The above description is only an example of the present application, and the protection scope of the present application is not limited by these specific examples, but is defined by the claims of the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.