CN114939324A - Suspension type power switch cabinet gas adsorption device - Google Patents

Abstract

The present invention is a gas adsorption device for a suspended power switch cabinet, comprising: an insulating gas adsorption device body, a storage cavity, a first connecting piece, gas adsorption particles and a temperature/humidity digital display; it can be suspended by a support hook or sucked by a suction cup. Effectively utilize the space in the switch cabinet and keep a sufficient safety distance from the live parts, which is highly practical; the insulating gas adsorption device body has insulating properties and will not affect the surrounding live parts, which is safe and stable; the gas adsorption particles are made of mixed molecular sieve, γ-oxidation Aluminum, activated carbon and diatomaceous earth, and the mixed molecular sieve is composed of different types of molecular sieves according to the ratio, so that the pore size of the gas adsorption particles presents a gradient. The gas adsorption particles have high specific surface area and porosity, and can effectively adsorb various characteristics. The gas is fixed in its pores. After heating or solvent elution again, the adsorbed gas can be separated and used for analysis and detection, and the detection result is more accurate.

Description

A suspended power switch cabinet gas adsorption device

technical field

The invention relates to the technical field of auxiliary appliances for electrical equipment, in particular to a gas adsorption device for a suspended electrical switch cabinet.

Background technique

Power switch cabinets are commonly used equipment in power transmission and transformation systems. Due to the long-term high-voltage live work of the equipment, the insulating materials on the surface are prone to thermal aging. At present, there are generally three insulating materials in power switch cabinets, namely epoxy resin, cross-linked polyethylene and silicone rubber, all of which have good insulating properties and are used in different parts of the switch cabinet. When certain faults occur in the power switch cabinet, such as interphase short circuit, poor contact, excessive instantaneous current, arc, etc., instantaneous high temperature or continuous high temperature will be generated, resulting in thermal aging of internal insulating materials and the release of small molecular gases. For example, epoxy resin will release ethylene oxide when it encounters high temperature, cross-linked polyethylene will release ethylene when it encounters high temperature, and silicone rubber will release siloxane when it encounters high temperature. Adsorption and capture of these typical gases can quickly determine the location of thermal aging failures and whether the insulation materials are suitable through analysis, which is of positive significance for the safe and stable operation of the switchgear.

However, it is difficult to install related large-scale equipment in the power switch cabinet, and there are many live parts. Even if the equipment is installed, it is necessary to ensure a suitable safety distance, which is difficult to take into account. The use of small device suspension can solve this problem very well. However, there is no small hanging device suitable for power switchgear.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a gas adsorption device for a suspended power switch cabinet with a simple structure, good adsorption effect and easy popularization.

In order to achieve the above purpose, the present invention adopts the following technical solutions: a gas adsorption device for a suspended power switch cabinet, comprising: an insulating gas adsorption device body; the insulating gas adsorption device body is provided with a first connector, and there are multiple A storage cavity for storing gas adsorption particles;

A plurality of ventilation holes are arranged on the cavity wall of the storage cavity to allow the gas in the power switch cabinet to penetrate into the storage cavity; the aperture of the ventilation holes is smaller than the particle size of the gas adsorption particles; the gas adsorption The particles are composed of the following components in parts by weight: 5-7 parts of mixed molecular sieve, 6-8 parts of gamma alumina, 3-5 parts of activated carbon, and 2-3 parts of diatomaceous earth; the mixed molecular sieve is composed of the following parts by weight of components Composition: 10-15 parts of 3A molecular sieve, 15-20 parts of 4A molecular sieve, 5-10 parts of 5A molecular sieve, 20-25 parts of 10X molecular sieve;

The insulating gas adsorption device body is also provided with a temperature/humidity digital display.

Further, the first connector is made of cross-linked polyethylene with good electrical insulation properties, and the first connector is used to install the insulating gas adsorption device body on the power switch cabinet; the first connector is a hook or suction cups.

Further, the number of the storage cavity is 2-4, the storage cavity is provided with a door that can be opened and closed, and the aperture of the ventilation hole is 1 mm.

Further, the gas adsorption particles are composed of the following components in parts by weight: 5.5-7 parts of mixed molecular sieve, 7-8 parts of γ-alumina, 4-5 parts of activated carbon, and 2.5-3 parts of diatomaceous earth; the mixed molecular sieve It is composed of the following components in parts by weight: 12-15 parts of 3A molecular sieve, 17-20 parts of 4A molecular sieve, 7-10 parts of 5A molecular sieve, and 22-25 parts of 10X molecular sieve.

Further, the gas adsorption particles also include 20-25 parts by weight of modified molecular sieve; the preparation method of the modified molecular sieve is: 1) adding 5A molecular sieve to an aqueous solution of sodium carbonate with a concentration of 0.6-0.8 mol/L , stirring and reacting at a temperature of 85-95 °C for 1.5-2.5 h to obtain a 5A molecular sieve treated once; 2) adding the once-treated 5A molecular sieve to a potassium hydroxide aqueous solution with a concentration of 0.15-0.25 mol/L, at the temperature Stirring and reacting at 50-60°C for 2.5-3.5h to obtain the secondary-treated 5A molecular sieve; 3) calcining the secondary-treated 5A molecular sieve at 250-300°C for 3-5h to obtain the modified molecular sieve.

Further, the gas adsorption particles also include 22-25 parts by weight of modified molecular sieve; the preparation method of the modified molecular sieve is: 1) adding 5A molecular sieve to an aqueous solution of sodium carbonate with a concentration of 0.7-0.8 mol/L , stirring and reacting at a temperature of 90-95 ℃ for 2-2.5 hours to obtain a 5A molecular sieve treated once; 2) adding the once-treated 5A molecular sieve to an aqueous potassium hydroxide solution with a concentration of 0.18-0.25 mol/L, at the temperature The modified molecular sieve is obtained by calcining the secondary treated 5A molecular sieve at 270°C to 300°C for 4 to 5 hours.

Further, the insulating gas adsorption device body is made of silicone rubber or cross-linked polyethylene material.

Further, the gas adsorption particles are first packed in a bag with micropores made of polyethylene as an adsorbent, and then the adsorbent is put into the storage cavity.

Further, the insulating gas adsorption device body is provided with a plurality of heat dissipation holes.

Further, the diameter of the heat dissipation holes is 135-155 mm.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the present invention is a gas adsorption device for a suspended power switch cabinet, which adopts a support hook or a suction cup of cross-linked polyethylene with good electrical insulation properties, and is used for Hanging or suction hanging in the switch cabinet, the use of support hook hanging or suction cup adsorption can effectively utilize the space in the switch cabinet, and maintain a sufficient safety distance from the live part, which is highly practical; the insulating gas adsorption device body has insulating properties, not It will affect the surrounding charged parts and is safe and stable; the gas adsorption particles are composed of mixed molecular sieve, gamma alumina, activated carbon and diatomite, and the mixed molecular sieve is composed of different types of molecular sieves according to the proportions, so that the pore size of the gas adsorption particles presents a gradient, and the gas adsorption While the adsorption particles have high specific surface area and porosity, they can also effectively adsorb carbon monoxide, nitrogen dioxide, ethylene oxide, ethylene, siloxane and other characteristic gases and fix them in their pores. When heated or solvent washed again After desorption, the adsorbed gas can be separated and used for analysis and detection, and the detection results are more accurate; it is equipped with a temperature/humidity digital display that can be purchased in the market, which is convenient for monitoring the temperature and humidity in the switch cabinet, and is practical Strong sex.

The present invention is a gas adsorption device for a suspended power switch cabinet. Special modified molecular sieves are also added to the gas adsorption particles, and 5A molecular sieves are selected, which are sequentially subjected to alkali modification of sodium carbonate aqueous solution, alkali modification of potassium hydroxide aqueous solution, and high temperature firing. , the specific surface area of micropores of the modified molecular sieve is increased by about 10%, the volume of micropores is increased by about 8%, and the total pore volume is increased by about 6%. The modified molecular sieve can effectively adsorb ozone. After heating or solvent elution, that is, The adsorbed ozone can be separated and used for analysis and detection, and the detection result of ozone content is more accurate.

Description of drawings

Hereinafter, some specific embodiments of the present application will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

Fig. 1 is the structural schematic diagram of the gas adsorption device of the suspended power switch cabinet of the present invention;

FIG. 2 is a schematic structural diagram of another form of the gas adsorption device for the suspended power switch cabinet according to the present invention.

Detailed ways

The following examples can help those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any way.

Example 1

As shown in FIG. 1 , a gas adsorption device for a suspended power switch cabinet includes: an insulating gas adsorption device body 2; the insulating gas adsorption device body 2 is made of cross-linked polyethylene material, and the insulating gas adsorption device body has an insulating performance, will not affect the surrounding live parts, safe and stable; the insulating gas adsorption device body 2 is provided with a first connector 1, and there are 4 storage cavities 21 for accommodating the gas adsorption particles 3 inside; The gas adsorption particles 3 are packed in a bag with micropores made of polythene as an adsorbent, and then the adsorbent is put into the storage cavity 21 to facilitate the replacement of the gas adsorption particles 3; A door 211 that can be opened and closed is provided to facilitate taking the gas adsorption particles 3;

The insulating gas adsorption device body 2 is provided with a plurality of heat dissipation holes 23, and the diameter of the heat dissipation holes 23 is 135-155 mm, which is convenient for the heat dissipation of the insulating gas adsorption device body 2;

The first connector 1 is made of cross-linked polyethylene with good electrical insulating properties, and the first connector 1 is used to install the insulating gas adsorption device body on the power switch cabinet; the first connector 1 is a hook , The use of support hook suspension or suction cup adsorption can effectively utilize the space in the switch cabinet, and maintain a sufficient safety distance from the live part, which is highly practical;

The cavity wall of the storage cavity 21 is provided with a plurality of ventilation holes 22 to allow the gas in the power switch cabinet to penetrate into the storage cavity 21 ; the diameter of the ventilation holes 22 is smaller than the particle size of the gas adsorption particles 3 The gas adsorption particles 3 are composed of the following components by weight: 5-7 parts of mixed molecular sieve, 6-8 parts of γ-alumina, 3-5 parts of activated carbon, and 2-3 parts of diatomaceous earth; the mixed molecular sieve is composed of The following components in parts by weight are composed of: 10-15 parts of 3A molecular sieve, 15-20 parts of 4A molecular sieve, 5-10 parts of 5A molecular sieve, 20-25 parts of 10X molecular sieve; or the gas adsorption particles 3 are composed of the following components by weight Composition: 5-7 parts of mixed molecular sieve, 6-8 parts of gamma alumina, 3-5 parts of activated carbon, and 2-3 parts of diatomaceous earth; the mixed molecular sieve is composed of the following components by weight: 10-15 parts of 3A molecular sieve , 15-20 parts of 4A molecular sieve, 5-10 parts of 5A molecular sieve, 20-25 parts of 10X molecular sieve, 20-25 parts of modified molecular sieve; gas adsorption particles are composed of mixed molecular sieve, gamma alumina, activated carbon and diatomaceous earth, and mixed molecular sieve It is composed of different types of molecular sieves according to the proportions, so that the pore size of the gas adsorption particles presents a gradient. While the gas adsorption particles have high specific surface area and porosity, they can also effectively adsorb various characteristic gases and fix them in their small pores. After heating or solvent elution, the adsorbed gas can be separated and used for analysis and detection, and the detection result is more accurate;

The insulating gas adsorption device body 2 is also provided with a temperature/humidity digital display 4, which is convenient for monitoring the temperature and humidity in the switch cabinet, and has strong practicability.

Example 2

As shown in FIG. 2 , a gas adsorption device for a suspended power switchgear includes: an insulating gas adsorption device body 2; the insulating gas adsorption device body 2 is made of silicone rubber, and the insulating gas adsorption device body has insulating properties and is not It will affect the surrounding charged parts, and is safe and stable; the insulating gas adsorption device body 2 is provided with a first connector 1, and there are 4 storage cavities 21 for storing gas adsorption particles 3 inside;

The insulating gas adsorption device body 2 is provided with a plurality of heat dissipation holes 23, and the diameter of the heat dissipation holes 23 is 135-155 mm, which is convenient for the heat dissipation of the insulating gas adsorption device body 2;

The first connector 1 is made of cross-linked polyethylene with good electrical insulating properties, and the first connector 1 is used to install the insulating gas adsorption device body on the power switch cabinet; the first connector 1 is a suction cup , The use of support hook suspension or suction cup adsorption can effectively utilize the space in the switch cabinet, and maintain a sufficient safety distance from the live part, which is highly practical;

The cavity wall of the storage cavity 21 is provided with a plurality of ventilation holes 22 to allow the gas in the power switch cabinet to penetrate into the storage cavity 21 ; the diameter of the ventilation holes 22 is smaller than the particle size of the gas adsorption particles 3 The gas adsorption particles 3 are composed of the following components by weight: 5-7 parts of mixed molecular sieve, 6-8 parts of γ-alumina, 3-5 parts of activated carbon, and 2-3 parts of diatomaceous earth; the mixed molecular sieve is composed of The following components in parts by weight are composed of: 10-15 parts of 3A molecular sieve, 15-20 parts of 4A molecular sieve, 5-10 parts of 5A molecular sieve, 20-25 parts of 10X molecular sieve; or the gas adsorption particles 3 are composed of the following components by weight Composition: 5-7 parts of mixed molecular sieve, 6-8 parts of gamma alumina, 3-5 parts of activated carbon, and 2-3 parts of diatomaceous earth; the mixed molecular sieve is composed of the following components by weight: 10-15 parts of 3A molecular sieve , 15-20 parts of 4A molecular sieve, 5-10 parts of 5A molecular sieve, 20-25 parts of 10X molecular sieve, 20-25 parts of modified molecular sieve; gas adsorption particles are composed of mixed molecular sieve, gamma alumina, activated carbon and diatomaceous earth, and mixed molecular sieve It is composed of different types of molecular sieves according to the proportions, so that the pore size of the gas adsorption particles presents a gradient. While the gas adsorption particles have high specific surface area and porosity, they can also effectively adsorb various characteristic gases and fix them in their small pores. After heating or solvent elution, the adsorbed gas can be separated and used for analysis and detection, and the detection result is more accurate;

The insulating gas adsorption device body 2 is also provided with a temperature/humidity digital display 4, which is convenient for monitoring the temperature and humidity in the switch cabinet, and has strong practicability.

Adopt the suspension type power switchgear gas adsorption device in the embodiment 2 to carry out the verification test, and the verification test is as follows:

Verification test 1:

The gas adsorption device is: the suspended power switch cabinet gas adsorption device in Example 2;

The gas adsorption particles in the gas adsorption device of the suspended power switchgear are composed of the following components in parts by weight: 5 parts of mixed molecular sieve, 6 parts of gamma alumina, 3 parts of activated carbon, 2 parts of diatomaceous earth, and 20 parts of modified molecular sieve; The mixed molecular sieve is composed of the following components in parts by weight: 10 parts of 3A molecular sieve, 15 parts of 4A molecular sieve, 5 parts of 5A molecular sieve, and 20 parts of 10X molecular sieve; the preparation method of the modified molecular sieve is: 1) Add 5A molecular sieve to a concentration of 0.6 mol/L sodium carbonate aqueous solution, stirring and reacting for 1.5 h at a temperature of 85 °C to obtain a 5A molecular sieve treated once; 2) adding the once treated 5A molecular sieve to an aqueous potassium hydroxide solution with a concentration of 0.15 mol/L 3) The modified molecular sieve is obtained by firing the secondary treated 5A molecular sieve at 250°C for 3 hours.

Gas adsorption test:

Put the suspended power switchgear gas adsorption device in Example 2 into container one with a volume of 13L and a carbon monoxide concentration of 0.015mol/L; container two with a volume of 13L and a nitrogen dioxide concentration of 0.015mol/L; volume Container 3 with a volume of 13L and a concentration of ethylene oxide of 0.015mol/L; Container 4 with a volume of 13L and a degree of ethylene of 0.015mol/L; Container 5 with a volume of 13L and a concentration of siloxane of 0.015mol/L; Container six with 13L and ozone concentration of 0.015mol/L; measure the gas adsorption rate, and the test results are shown in Table 1 below:

Table 1

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Adsorption rate(%) 99.98 99.97 99.96 99.96 99.95 99.98

Content test result accuracy test:

Put the suspended power switchgear gas adsorption device in Example 2 into a carbon monoxide concentration of 0.015㎎/L, a nitrogen dioxide concentration of 0.015㎎/L, an ethylene oxide concentration of 0.015㎎/L, and an ethylene concentration of 0.015㎎ /L, siloxane concentration of 0.015㎎/L, ozone concentration of 0.015㎎/L in the switchgear for 3 hours, then take it out, use solvent to elute the gas, and then check the content of each component, the accuracy of the test results. As shown in Table 2 below:

Table 2

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Accuracy 0.995 0.997 0.996 0.995 0.997 0.995

Verification test 2:

The gas adsorption device is: the suspended power switch cabinet gas adsorption device in Example 2;

The gas adsorption particles in the gas adsorption device of the suspended power switch cabinet are composed of the following components in parts by weight: 7 parts of mixed molecular sieve, 8 parts of gamma alumina, 5 parts of activated carbon, 3 parts of diatomaceous earth, and 25 parts of modified molecular sieve; The mixed molecular sieve is composed of the following components in parts by weight: 15 parts of 3A molecular sieve, 20 parts of 4A molecular sieve, 10 parts of 5A molecular sieve, and 25 parts of 10X molecular sieve; the preparation method of the modified molecular sieve is: 1) adding 5A molecular sieve to the concentration of 0.8mol/L sodium carbonate aqueous solution, stirring and reacting for 2.5h at a temperature of 95 ℃ to obtain a 5A molecular sieve treated once; 2) adding the once treated 5A molecular sieve to a potassium hydroxide aqueous solution with a concentration of 0.25mol/L 3) The modified molecular sieve is obtained by firing the secondary treated 5A molecular sieve at 300°C for 5 hours.

Gas adsorption test:

Put the suspended power switchgear gas adsorption device in Example 2 into container one with a volume of 13L and a carbon monoxide concentration of 0.015mol/L; container two with a volume of 13L and a nitrogen dioxide concentration of 0.015mol/L; volume Container 3 with a volume of 13L and a concentration of ethylene oxide of 0.015mol/L; Container 4 with a volume of 13L and a degree of ethylene of 0.015mol/L; Container 5 with a volume of 13L and a concentration of siloxane of 0.015mol/L; Container six with 13L and ozone concentration of 0.015mol/L; measure the gas adsorption rate, and the test results are shown in Table 3 below:

table 3

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Adsorption rate(%) 99.97 99.97 99.98 99.95 99.96 99.97

Content test result accuracy test:

Put the suspended power switchgear gas adsorption device in Example 2 into a carbon monoxide concentration of 0.015㎎/L, a nitrogen dioxide concentration of 0.015㎎/L, an ethylene oxide concentration of 0.015㎎/L, and an ethylene concentration of 0.015㎎ /L, siloxane concentration of 0.015㎎/L, ozone concentration of 0.015㎎/L in the switchgear for 3 hours, then take it out, use solvent to elute the gas, and then check the content of each component, the accuracy of the test results. As shown in Table 4 below:

Table 4

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Accuracy 0.995 0.995 0.996 0.996 0.995 0.995

Verification test 3:

The gas adsorption device is: the suspended power switch cabinet gas adsorption device in Example 2;

The gas adsorption particles in the gas adsorption device of the suspended power switch cabinet are composed of the following components in parts by weight: 5.5 parts of mixed molecular sieve, 7 parts of gamma alumina, 4 parts of activated carbon, 2.5 parts of diatomaceous earth, and 22 parts of modified molecular sieve; The mixed molecular sieve is composed of the following components in parts by weight: 12 parts of 3A molecular sieve, 17 parts of 4A molecular sieve, 7 parts of 5A molecular sieve, and 22 parts of 10X molecular sieve; the preparation method of the modified molecular sieve is: 1) Add 5A molecular sieve to the concentration of 0.7 mol/L sodium carbonate aqueous solution, stirring and reacting at 90 °C for 2 h to obtain the 5A molecular sieve treated once; 2) adding the once treated 5A molecular sieve to the potassium hydroxide aqueous solution with a concentration of 0.18 mol/L , stirring and reacting at a temperature of 55 °C for 3 hours to obtain the secondary treated 5A molecular sieve; 3) calcining the secondary treated 5A molecular sieve at 270 °C for 4 hours to obtain the modified molecular sieve.

Gas adsorption test:

Put the suspended power switchgear gas adsorption device in Example 2 into container one with a volume of 13L and a carbon monoxide concentration of 0.015mol/L; container two with a volume of 13L and a nitrogen dioxide concentration of 0.015mol/L; volume Container 3 with a volume of 13L and a concentration of ethylene oxide of 0.015mol/L; Container 4 with a volume of 13L and a degree of ethylene of 0.015mol/L; Container 5 with a volume of 13L and a concentration of siloxane of 0.015mol/L; Container six with 13L and ozone concentration of 0.015mol/L; measure the gas adsorption rate, and the test results are shown in Table 5 below:

table 5

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Adsorption rate(%) 99.99 99.98 99.99 99.97 99.99 99.98

Content test result accuracy test:

Put the suspended power switchgear gas adsorption device in Example 2 into a carbon monoxide concentration of 0.015㎎/L, a nitrogen dioxide concentration of 0.015㎎/L, an ethylene oxide concentration of 0.015㎎/L, and an ethylene concentration of 0.015㎎ /L, siloxane concentration of 0.015㎎/L, ozone concentration of 0.015㎎/L in the switchgear for 3 hours, then take it out, use solvent to elute the gas, and then check the content of each component, the accuracy of the test results. As shown in Table 6 below:

Table 6

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Accuracy 0.997 0.998 0.998 0.999 0.998 0.997

Verification test 4:

The gas adsorption device is: the suspended power switch cabinet gas adsorption device in Example 2;

The gas adsorption particles in the gas adsorption device of the suspended power switch cabinet are composed of the following components by weight: 5.5 parts of mixed molecular sieve, 7 parts of γ-alumina, 4 parts of activated carbon, and 2.5 parts of diatomaceous earth; the mixed molecular sieve is composed of the following weights 12 parts of 3A molecular sieves, 17 parts of 4A molecular sieves, 7 parts of 5A molecular sieves, and 22 parts of 10X molecular sieves.

Gas adsorption test:

Put the suspended power switchgear gas adsorption device in Example 2 into container one with a volume of 13L and a carbon monoxide concentration of 0.015mol/L; container two with a volume of 13L and a nitrogen dioxide concentration of 0.015mol/L; volume Container 3 with a volume of 13L and a concentration of ethylene oxide of 0.015mol/L; Container 4 with a volume of 13L and a degree of ethylene of 0.015mol/L; Container 5 with a volume of 13L and a concentration of siloxane of 0.015mol/L; Container six with 13L and ozone concentration of 0.015mol/L; measure the gas adsorption rate, and the test results are shown in Table 7 below:

Table 7

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Adsorption rate(%) 99.95 99.95 99.96 99.95 99.96 91.03

Content test result accuracy test:

Put the suspended power switchgear gas adsorption device in Example 2 into a carbon monoxide concentration of 0.015㎎/L, a nitrogen dioxide concentration of 0.015㎎/L, an ethylene oxide concentration of 0.015㎎/L, and an ethylene concentration of 0.015㎎ /L, siloxane concentration of 0.015㎎/L, ozone concentration of 0.015㎎/L in the switchgear for 3 hours, then take it out, use solvent to elute the gas, and then check the content of each component, the accuracy of the test results. As shown in Table 8 below:

Table 8

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Accuracy 0.995 0.995 0.996 0.995 0.995 0.835

Verification test 5

The gas adsorption device is: the suspended power switch cabinet gas adsorption device in Example 2;

The gas adsorption particles in the gas adsorption device of the suspended power switch cabinet are composed of the following components in parts by weight: 5.5 parts of 5A molecular sieve, 7 parts of gamma alumina, 4 parts of activated carbon, 2.5 parts of diatomaceous earth, and 22 parts of modified molecular sieve; The preparation method of the modified molecular sieve is as follows: 1) adding 5A molecular sieve into an aqueous solution of sodium carbonate with a concentration of 0.7 mol/L, and stirring and reacting at a temperature of 90 ° C for 2 h to obtain the 5A molecular sieve treated once; The 5A molecular sieve was added to the potassium hydroxide aqueous solution with a concentration of 0.18mol/L, and the reaction was stirred at a temperature of 55 °C for 3 h to obtain the secondary treated 5A molecular sieve; 3) The secondary treated 5A molecular sieve was fired at 270 °C 4h, the modified molecular sieve was obtained.

Gas adsorption test:

Put the suspended power switchgear gas adsorption device in Example 2 into container one with a volume of 13L and a carbon monoxide concentration of 0.015mol/L; container two with a volume of 13L and a nitrogen dioxide concentration of 0.015mol/L; volume Container 3 with a volume of 13L and a concentration of ethylene oxide of 0.015mol/L; Container 4 with a volume of 13L and a degree of ethylene of 0.015mol/L; Container 5 with a volume of 13L and a concentration of siloxane of 0.015mol/L; Container six with 13L and ozone concentration of 0.015mol/L; measure the gas adsorption rate, and the test results are shown in Table 9 below:

Table 9

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Adsorption rate(%) 92.12 90.15 89.23 88.26 86.37 88.18

Content test result accuracy test:

Put the suspended power switchgear gas adsorption device in Example 2 into a carbon monoxide concentration of 0.015㎎/L, a nitrogen dioxide concentration of 0.015㎎/L, an ethylene oxide concentration of 0.015㎎/L, and an ethylene concentration of 0.015㎎ /L, siloxane concentration of 0.015㎎/L, ozone concentration of 0.015㎎/L in the switchgear for 3 hours, then take it out, use solvent to elute the gas, and then check the content of each component, the accuracy of the test results. As shown in Table 10 below:

Table 10

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Accuracy 0.912 0.921 0.909 0.903 0.897 0.889

Validation test 6

The gas adsorption device is: the suspended power switch cabinet gas adsorption device in Example 2;

The gas adsorption particles in the gas adsorption device of the suspended power switch cabinet are composed of the following components in parts by weight: 5A molecular sieve.

Gas adsorption test:

Put the suspended power switchgear gas adsorption device in Example 2 into container one with a volume of 13L and a carbon monoxide concentration of 0.015mol/L; container two with a volume of 13L and a nitrogen dioxide concentration of 0.015mol/L; volume Container 3 with a volume of 13L and a concentration of ethylene oxide of 0.015mol/L; Container 4 with a volume of 13L and a degree of ethylene of 0.015mol/L; Container 5 with a volume of 13L and a concentration of siloxane of 0.015mol/L; Container six with 13L and ozone concentration of 0.015mol/L; measure the gas adsorption rate, and the test results are shown in Table 11 below:

Table 11

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Adsorption rate(%) 56.08 45.1 -- 68.18 -- --

Content test result accuracy test:

Put the suspended power switchgear gas adsorption device in Example 2 into a carbon monoxide concentration of 0.015㎎/L, a nitrogen dioxide concentration of 0.015㎎/L, an ethylene oxide concentration of 0.015㎎/L, and an ethylene concentration of 0.015㎎ /L, siloxane concentration of 0.015㎎/L, ozone concentration of 0.015㎎/L in a switch cabinet for 3 hours, then take it out, use solvent to elute the gas, and then check the content of each component, the accuracy of the test results As shown in Table 12 below:

Table 12

gas carbon monoxide nitrogen dioxide ethylene oxide vinyl Siloxane ozone Accuracy 0.671 0.432 -- 0.541 -- --

From this, it can be seen that the gas adsorption device of the hanging power switch cabinet of the present invention adopts the support hook or suction cup of cross-linked polyethylene with good electrical insulation properties, which is used for hanging or suction in the switch cabinet. The method can effectively use the space in the switch cabinet, and maintain a sufficient safety distance from the live parts, which is highly practical; the insulating gas adsorption device body has insulating properties, and will not affect the surrounding live parts, which is safe and stable; the gas adsorption particles are made of mixed molecular sieves. , γ-alumina, activated carbon and diatomaceous earth, and the mixed molecular sieve is composed of different types of molecular sieves according to the proportions, so that the pore size of the gas adsorption particles presents a gradient, and the gas adsorption particles have high specific surface area and porosity. Adsorb characteristic gases such as carbon monoxide, nitrogen dioxide, ethylene oxide, ethylene, siloxane and fix them in the pores. After heating or solvent elution again, the adsorbed gases can be separated and used for analysis and detection , the detection results are more accurate; there is a temperature/humidity digital display that can be purchased on the market, which is convenient for monitoring the temperature and humidity in the switch cabinet, and has strong practicability; a special modified molecular sieve is also added to the gas adsorption particles , select 5A molecular sieve, carry out alkali modification of sodium carbonate aqueous solution, alkali modification of potassium hydroxide aqueous solution, and high temperature firing in sequence, so that the micropore specific surface area of the modified molecular sieve is increased by about 10%, and the micropore volume is increased by about 8%. The volume is increased by about 6%, and the modified molecular sieve can effectively adsorb ozone. After heating or solvent elution, the adsorbed ozone can be separated and used for analysis and detection, and the detection result of ozone content is more accurate.

Although the present invention has been described in detail above with general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall within the scope of the claimed protection of the present invention.

Claims (10)

1. A suspension type power switch cabinet gas adsorption device is characterized by comprising: an insulating gas adsorption device body;

the insulating gas adsorption device body is provided with a first connecting piece, and a plurality of containing cavities for containing gas adsorption particles are arranged inside the insulating gas adsorption device body;

a plurality of air holes are formed in the cavity wall of the accommodating cavity and used for enabling air in the power switch cabinet to permeate into the accommodating cavity; the aperture of the air holes is smaller than the particle size of the gas adsorption particles; the gas adsorption particles comprise the following components in parts by weight: 5-7 parts of a mixed molecular sieve, 6-8 parts of gamma alumina, 3-5 parts of activated carbon and 2-3 parts of diatomite; the mixed molecular sieve comprises the following components in parts by weight: 10-15 parts of a 3A molecular sieve, 15-20 parts of a 4A molecular sieve, 5-10 parts of a 5A molecular sieve and 20-25 parts of a 10X molecular sieve;

the insulating gas adsorption device body is also provided with a temperature/humidity digital display.

2. The suspension type power switch cabinet gas adsorption device according to claim 1, wherein the first connector is made of cross-linked polyethylene with good electrical insulation property, and is used for mounting the insulation gas adsorption device body on the power switch cabinet; the first connecting piece is a hook or a sucker.

3. The gas adsorption device of the suspension type power switch cabinet according to claim 1, wherein the number of the receiving cavities is 2-4, the receiving cavities are provided with openable and closable doors, and the diameter of the air holes is 1 mm.

4. The suspension type power switch cabinet gas adsorption device according to claim 1, wherein the gas adsorption particles are composed of the following components in parts by weight: 5.5-7 parts of a mixed molecular sieve, 7-8 parts of gamma alumina, 4-5 parts of activated carbon and 2.5-3 parts of diatomite; the mixed molecular sieve comprises the following components in parts by weight: 12-15 parts of 3A molecular sieve, 17-20 parts of 4A molecular sieve, 7-10 parts of 5A molecular sieve and 22-25 parts of 10X molecular sieve.

5. The suspension type power switch cabinet gas adsorption device according to claim 1, wherein the gas adsorption particles further comprise 20-25 parts by weight of modified molecular sieve; the preparation method of the modified molecular sieve comprises the following steps: 1) adding the 5A molecular sieve into a sodium carbonate aqueous solution with the concentration of 0.6-0.8 mol/L, and stirring and reacting for 1.5-2.5 h at the temperature of 85-95 ℃ to obtain a primary treated 5A molecular sieve; 2) adding the primarily treated 5A molecular sieve into a potassium hydroxide aqueous solution with the concentration of 0.15-0.25 mol/L, and stirring and reacting for 2.5-3.5 h at the temperature of 50-60 ℃ to obtain a secondarily treated 5A molecular sieve; 3) and firing the secondarily treated 5A molecular sieve at 250-300 ℃ for 3-5 h to obtain the modified molecular sieve.

6. The suspension type power switch cabinet gas adsorption device according to claim 5, wherein the gas adsorption particles further comprise 22-25 parts by weight of modified molecular sieve; the preparation method of the modified molecular sieve comprises the following steps: 1) adding the 5A molecular sieve into a sodium carbonate aqueous solution with the concentration of 0.7-0.8 mol/L, and stirring and reacting at the temperature of 90-95 ℃ for 2-2.5 h to obtain a primary treated 5A molecular sieve; 2) adding the primarily treated 5A molecular sieve into a potassium hydroxide aqueous solution with the concentration of 0.18-0.25 mol/L, and stirring and reacting for 3-3.5 h at the temperature of 55-60 ℃ to obtain a secondarily treated 5A molecular sieve; 3) and (3) firing the secondarily treated 5A molecular sieve at 270-300 ℃ for 4-5 h to obtain the modified molecular sieve.

7. The suspension type power switch cabinet gas adsorption device according to claim 1, wherein the insulation gas adsorption device body is made of silicon rubber or cross-linked polyethylene material.

8. The suspension type gas adsorption device for the power switch cabinet according to claim 1, wherein the gas adsorption particles are filled in a microporous bag made of polyethylene for being used as an adsorbent, and then the adsorbent is placed in the containing cavity.

9. The suspension type power switch cabinet gas adsorption device according to claim 1, wherein the insulation gas adsorption device body is provided with a plurality of heat dissipation holes.

10. The use method of the suspension type power switch cabinet gas adsorption device according to claim 9, wherein the aperture of the heat dissipation hole is 135-155 mm.

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