CN112480875A - High-temperature warning phase-change ball containing irritant gas and preparation method thereof - Google Patents
High-temperature warning phase-change ball containing irritant gas and preparation method thereof Download PDFInfo
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Abstract
The invention provides a high-temperature warning phase-change ball containing irritant gas, which comprises a ball shell made of phase-change material and a spherical telescopic membrane, wherein the spherical telescopic membrane is tightly attached to the inside of the ball shell and provided with an opening, and the irritant gas with pressure is filled in the internal space of the phase-change ball; the invention also provides a preparation method of the high-temperature warning phase-change ball containing the irritant gas, which comprises the steps of inflating and sealing, coating the phase-change material, cooling the phase-change material, puncturing the spherical telescopic membrane to obtain a puncture hole, partially retracting the metal needle to complete sealing of the irritant gas inside, completely retracting the metal needle to gradually and naturally cool and solidify the phase-change material in the spherical shell contacted with the needle and the like. The high-temperature warning phase-change ball provided by the invention has the advantages of simple structure, good environmental tolerance, recyclable materials, stability and reliability; the corresponding preparation method is simple and convenient to operate and high in success rate.
Description
Technical Field
The invention relates to the field of safety warning, in particular to a high-temperature warning phase-change ball containing irritant gas and a preparation method thereof.
Background
In the fields of industrial and agricultural production and resident life, high temperature and fire hazard need to be prevented, in particular to the potential safety hazard brought by the operation process of various devices. Among them, many potential safety hazards are collectively manifested as an increase in the temperature of the equipment, beyond its safe temperature range. For example, during the charging and discharging process of a lithium ion battery, the temperature of the shell is usually kept within a certain range; once the lithium ion battery has a short circuit or other safety accidents, the temperature of the shell can rise rapidly and exceed the safety temperature limit, and finally potential safety hazards such as fire or even explosion can be brought. In order to find out unreasonable high temperature phenomena in the operation process of related equipment in time, the known technical means is that a temperature sensor and a related data acquisition and alarm device thereof are generally additionally arranged on the equipment, and once the temperature exceeds a safe temperature limit, sound and light alarm is triggered. However, the above-mentioned high temperature warning means based on the temperature sensor has many disadvantages: firstly, the temperature sensor and the related data acquisition and alarm device thereof have more components and higher cost; secondly, as a power supply module is involved, a power supply circuit needs to be externally connected or a storage battery needs to be used, and the installation and the maintenance are troublesome; thirdly, the electronic components are prone to failure due to environmental corrosion or self aging and other factors, and the stability and reliability of the electronic components after long-term use cannot be guaranteed.
Therefore, how to design and manufacture a high-temperature warning device with low cost, convenient maintenance, stability and reliability is a technical problem to be solved urgently aiming at the high-temperature warning requirements in various occasions.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-temperature warning phase-change ball containing irritant gas, which is simple in structure, low in cost, convenient to maintain, stable and reliable, and a preparation method thereof.
According to one aspect of the invention, a high-temperature warning phase-change ball containing irritant gas is provided, and the technical scheme is as follows: a high-temperature warning phase-change ball containing irritant gas comprises a ball shell made of phase-change materials and a spherical telescopic membrane which is tightly attached to the inside of the ball shell and provided with an opening, wherein the irritant gas with pressure is filled in an inner space surrounded by the ball shell and the spherical telescopic membrane of the phase-change ball.
The phase-change material is a paraffin or ester acid organic solid-liquid phase-change material with a phase-change temperature point near the warning temperature, which is selected according to the required warning temperature, and the irritant gas is ammonia gas or hydrogen sulfide gas.
According to another aspect of the invention, a preparation method of the high-temperature warning phase-change ball containing irritant gas is provided, and the technical scheme is divided into the following steps:
step S1: filling stimulating gas with pressure into the spherical telescopic membrane, and sealing the spherical telescopic membrane;
step S2: heating and melting the phase change material into a liquid state, and uniformly coating the liquid phase change material on the outer surface of the spherical telescopic membrane obtained in the step S1 to completely wrap the spherical telescopic membrane with the liquid phase change material;
step S3: cooling the liquid phase-change material and solidifying the liquid phase-change material to obtain a spherical structure which takes the solid phase-change material as a spherical shell, the spherical shell is internally wrapped with a spherical telescopic membrane, and the inside of the spherical telescopic membrane contains the irritant gas with pressure;
step S4: heating the metal needle to a temperature higher than the melting point temperature of the phase-change material, and immediately using the heated metal needle to rapidly penetrate the spherical structure obtained in the step S3 in a direction vertical to the spherical shell and puncture the spherical telescopic membrane to obtain puncture holes in the spherical telescopic membrane;
step S5: withdrawing the metal needle from the spherical telescopic membrane, retracting the metal needle and keeping the needle point position in the spherical shell, and maintaining for 5-30 seconds to naturally cool and solidify the phase change material in the spherical shell, which is in contact with the puncture hole in the spherical telescopic membrane, so as to complete the sealing of the internal irritant gas;
step S6: slowly retracting the metal needle, and gradually and naturally cooling and solidifying the phase-change material in the spherical shell contacted with the needle in the retraction process of the metal needle until the metal needle completely exits the spherical shell.
In the preparation method of the high-temperature warning phase-change ball containing the irritant gas, in the step S1, the irritant gas with pressure is filled into the spherical telescopic film, and the pressure of the irritant gas is 1-10 kPa higher than the standard atmospheric pressure.
In the preparation method of the high-temperature warning phase change ball containing the irritant gas, the coating thickness of the phase change material in the step S2 is 0.5-5 mm.
In the preparation method of the high-temperature warning phase-change ball containing the irritant gas, in the step S4, the heating temperature of the metal needle is 2-10 ℃ higher than the melting point temperature of the phase-change material.
In the preparation method of the high-temperature warning phase-change ball containing the irritant gas, in the step S6, the retreating direction of the metal needle is the direction far away from the center of the high-temperature warning phase-change ball, and the retreating speed is 0.1-0.5 mm/S.
The invention has the beneficial effects that:
1. the high-temperature warning phase-change ball containing the irritant gas has a simple structure, is low in cost and convenient to prepare, the required warning temperature can be obtained by selecting the type of the corresponding phase-change material, when a ball shell made of the phase-change material is melted under the action of external high temperature, the irritant gas under pressure in the space in the ball is released, and the pungent smell is emitted to play a role of high-temperature warning, so that the warning effect is good, and the used phase-change material can be recycled to realize recycling.
2. The high-temperature warning phase-change ball containing the irritant gas does not relate to electronic components, does not need power supply, realizes warning only by melting a shell at high temperature from the outside, belongs to a passive warning mode, and the shell belongs to a paraffin or ester acid organic solid-liquid phase-change material, so the high-temperature warning phase-change ball is stable and reliable, is convenient to maintain, can resist complex and severe environments such as acid-base corrosion and the like, and has good environmental adaptability.
3. The preparation method of the high-temperature warning phase-change ball containing the irritant gas comprises the steps of inflating and sealing through the spherical telescopic membrane, wrapping the phase-change material to realize shaping, finally puncturing the spherical telescopic membrane, and realizing secondary sealing of the internal gas by utilizing the melting and solidification characteristics of the phase-change material forming the spherical shell, so that the method is ingenious, simple and easy to implement.
Drawings
Fig. 1 is a schematic structural diagram of a high-temperature warning phase-change ball containing irritant gas in the embodiment of the invention.
FIG. 2 is a flow chart of a method for manufacturing a high temperature warning phase change ball containing irritant gas in an embodiment of the invention.
Fig. 3 is a schematic diagram illustrating the puncturing of the spherical telescopic membrane by a heated metal needle according to the embodiment of the present invention.
Fig. 4 is a schematic view of the embodiment of the invention when retracting the metal needle and keeping the needle tip position inside the spherical shell.
Fig. 5 is an enlarged view of a portion of fig. 4 within the dashed box.
Detailed Description
A high-temperature warning phase-change ball containing irritant gas comprises a ball shell made of phase-change materials and a spherical telescopic membrane which is tightly attached to the inside of the ball shell and provided with an opening, wherein the irritant gas with pressure is filled in an inner space surrounded by the ball shell and the spherical telescopic membrane of the phase-change ball.
Further, the phase-change material is a paraffin or ester acid organic solid-liquid phase-change material with a phase-change temperature point near the warning temperature, which is selected according to the required warning temperature.
A preparation method of a high-temperature warning phase-change ball containing irritant gas comprises the following steps:
step S1: filling stimulating gas with pressure into the spherical telescopic membrane, and sealing the spherical telescopic membrane;
further, in the step S1, a stimulating gas with pressure is filled into the spherical telescopic membrane, wherein the pressure is 1-10 kPa higher than the standard atmospheric pressure;
step S2: heating and melting the phase change material into a liquid state, and uniformly coating the liquid phase change material on the outer surface of the spherical telescopic membrane obtained in the step S1 to completely wrap the spherical telescopic membrane with the liquid phase change material;
further, the coating thickness of the phase change material in the step S2 is 0.5-5 mm
Step S3: cooling the liquid phase-change material and solidifying the liquid phase-change material to obtain a spherical structure which takes the solid phase-change material as a spherical shell, the spherical shell is internally wrapped with a spherical telescopic membrane, and the inside of the spherical telescopic membrane contains the irritant gas with pressure;
step S4: heating the metal needle to a temperature higher than the melting point temperature of the phase-change material, and immediately using the heated metal needle to rapidly penetrate the spherical structure obtained in the step S3 in a direction vertical to the spherical shell and puncture the spherical telescopic membrane to obtain puncture holes in the spherical telescopic membrane;
further, in the step S4, the heating temperature of the metal needle head is 2-10 ℃ higher than the melting point temperature of the phase-change material;
step S5: withdrawing the metal needle from the spherical telescopic membrane, retracting the metal needle and keeping the needle point position in the spherical shell, and maintaining for 5-30 seconds to naturally cool and solidify the phase change material in the spherical shell, which is in contact with the puncture hole in the spherical telescopic membrane, so as to complete the sealing of the internal irritant gas;
step S6: slowly retracting the metal needle, and gradually and naturally cooling and solidifying the phase-change material in the spherical shell contacted with the needle in the retraction process of the metal needle until the metal needle completely exits the spherical shell.
Further, the retreating direction of the metal needle in the step S6 is a direction away from the center of the high temperature warning phase change ball, and the retreating speed is 0.1-0.5 mm/S.
Examples
The invention is further described below with reference to the figures and examples.
A certain energy storage station needs to warn the high temperature possibly occurring in the charging and discharging process of a certain square aluminum shell lithium ion battery, and the warning temperature is 58 ℃. No. 58 fully refined paraffin is selected as a spherical shell material of the high-temperature warning phase-change ball, and the phase-change melting point of the material is about 58 ℃.
As shown in figure 1, the high-temperature warning phase-change ball contains irritant gas, wherein, 1 is a ball shell made of No. 58 total refined paraffin, 2 is a spherical expansion film tightly attached to the inner part of the ball shell, and 3 is an opening of the spherical expansion film. The inner space enclosed by the spherical shell and the spherical telescopic membrane of the phase-change ball is filled with irritant gas hydrogen sulfide with pressure.
As shown in fig. 2, the preparation of the high-temperature warning phase-change ball containing irritant gas comprises the following specific steps:
step S1: hydrogen sulfide, an irritant gas having a pressure of 2kPa higher than the standard atmospheric pressure, is filled into a balloon consisting of a spherical stretchable membrane, and the balloon is sealed and sealed by a bundling method.
Step S2: and heating and melting the No. 58 fully refined paraffin into a liquid state, and uniformly coating the liquid No. 58 fully refined paraffin on the outer surface of the balloon obtained in the step S1 to enable the No. 58 fully refined paraffin to completely wrap the balloon.
Step S3: and cooling the liquid phase-change material and solidifying the liquid phase-change material to obtain a spherical structure which takes the solid phase-change material as a spherical shell, the spherical shell is internally wrapped with a spherical telescopic membrane, and the inside of the spherical telescopic membrane contains the pressure irritant gas.
Step S4: and (4) heating the metal needle to 65 ℃, and immediately using the heated metal needle to rapidly penetrate the spherical structure obtained in the step (S3) in the direction vertical to the spherical shell and puncture the spherical telescopic membrane to obtain the puncture hole in the spherical telescopic membrane.
Referring to fig. 3, in fig. 3, 1 is a spherical shell made of 58 # fully refined paraffin, 2 is a spherical telescopic membrane tightly attached to the inside of the spherical shell, 3 is an opening of the spherical telescopic membrane, and 4 is a metal needle. In fig. 3, the heated metal needle penetrates the spherical structure in a direction perpendicular to the spherical shell and pierces the spherical telescopic membrane to obtain a puncture hole in the spherical telescopic membrane.
Step S5: and withdrawing the metal needle from the spherical telescopic membrane, retracting the metal needle and keeping the needle point position in the spherical shell, and maintaining for 10 seconds to naturally cool and solidify No. 58 fully refined paraffin wax which is in contact with the puncture hole in the spherical telescopic membrane in the spherical shell so as to finish sealing of the hydrogen sulfide gas in the spherical shell.
Referring to fig. 4, in fig. 4, 1 is a spherical shell made of 58 # fully refined paraffin, 2 is a spherical telescopic membrane tightly attached to the inside of the spherical shell, 3 is an opening of the spherical telescopic membrane, and 4 is a metal needle. The metal needle, which is detached from the balloon in fig. 4, keeps the needle tip in position inside the spherical shell.
For the convenience of observation, the range shown by the dotted line frame in fig. 4 is enlarged and drawn in fig. 5, 1 is a spherical shell made of 58 # fully refined paraffin, 2 is a spherical telescopic membrane tightly attached to the inner part of the spherical shell, 3 is an opening of the spherical telescopic membrane, and 4 is a metal needle.
Step S6: slowly retracting the metal needle, and gradually and naturally cooling and solidifying the phase-change material in the spherical shell contacted with the needle in the retraction process of the metal needle until the metal needle completely exits the spherical shell.
In the embodiment, the prepared high-temperature warning phase change ball containing hydrogen sulfide gas is fixed on the surface of the shell of the square aluminum shell lithium ion battery, and if faults such as short circuit and the like occur in the charging and discharging processes of the battery, the temperature of the battery is rapidly increased; when the temperature rises to above 58 ℃, the spherical shell of the high-temperature warning phase-change ball is melted, the shaping and sealing effects are lost, the hydrogen sulfide gas with pressure in the ball is rapidly released to the external environment through the open pore of the spherical telescopic membrane, and the pungent smell is emitted to play a role in high-temperature warning.
The embodiment provides a high-temperature warning phase-change ball containing irritant gas and a preparation method thereof, wherein a No. 58 fully refined paraffin is selected to realize a warning function of a high temperature of 58 ℃, the chemical activity of a paraffin material is low, the paraffin material is neutral, the chemical property is stable, the paraffin material does not react with an acid-base solution under a common condition, the environmental tolerance is good, and the maintenance is simple and convenient; when the paraffin is melted by the action of high temperature above 58 ℃, the pressurized hydrogen sulfide gas in the space in the ball is released, and the irritant odor is emitted to play a role in high-temperature warning, so that the warning effect is good; the phase change ball does not relate to electronic components, does not need power supply, only realizes warning by melting the shell at high temperature, belongs to a passive warning mode, and is stable and reliable; in the preparation process of the high-temperature warning phase-change ball, the spherical telescopic membrane is inflated and sealed, then the phase-change material is wrapped to realize shaping, and finally the spherical telescopic membrane is punctured and the internal gas is sealed again by utilizing the melting and solidification characteristics of the paraffin material forming the ball shell, so the operation is simple and easy. Therefore, the high-temperature warning phase-change ball containing the irritant gas has the advantages of simple structure, stability, reliability and low cost, is easy to customize by selecting the phase-change material with the corresponding melting point according to the specific warning temperature, and is convenient to recycle and reuse the used phase-change material; the corresponding preparation method is simple and convenient to operate, high in success rate and good in economical efficiency.
Claims (7)
1. The high-temperature warning phase-change ball containing irritant gas is characterized by comprising a ball shell made of phase-change material and a spherical telescopic membrane which is tightly attached to the inside of the ball shell and provided with an opening, wherein the inner space enclosed by the ball shell and the spherical telescopic membrane of the phase-change ball is filled with irritant gas with pressure.
2. A preparation method of a high-temperature warning phase-change ball containing irritant gas is characterized by comprising the following steps:
step S1: filling stimulating gas with pressure into the spherical telescopic membrane, and sealing the spherical telescopic membrane;
step S2: heating and melting the phase change material into a liquid state, and uniformly coating the liquid phase change material on the outer surface of the spherical telescopic membrane obtained in the step S1 to completely wrap the spherical telescopic membrane with the liquid phase change material;
step S3: cooling the liquid phase-change material and solidifying the liquid phase-change material to obtain a spherical structure which takes the solid phase-change material as a spherical shell, the spherical shell is internally wrapped with a spherical telescopic membrane, and the inside of the spherical telescopic membrane contains the irritant gas with pressure;
step S4: heating the metal needle to a temperature higher than the melting point temperature of the phase-change material, and immediately using the heated metal needle to rapidly penetrate the spherical structure obtained in the step S3 in a direction vertical to the spherical shell and puncture the spherical telescopic membrane to obtain puncture holes in the spherical telescopic membrane;
step S5: withdrawing the metal needle from the spherical telescopic membrane, retracting the metal needle and keeping the needle point position in the spherical shell, and maintaining for 5-30 seconds to naturally cool and solidify the phase change material in the spherical shell, which is in contact with the puncture hole in the spherical telescopic membrane, so as to complete the sealing of the internal irritant gas;
step S6: slowly retracting the metal needle, and gradually and naturally cooling and solidifying the phase-change material in the spherical shell contacted with the needle in the retraction process of the metal needle until the metal needle completely exits the spherical shell.
3. The high-temperature warning phase-change ball containing irritant gas as claimed in claim 1, wherein the phase-change material is paraffin or ester acid organic solid-liquid phase-change material with phase-change temperature point near warning temperature selected according to the required warning temperature, and the irritant gas is ammonia gas or hydrogen sulfide gas.
4. The method for preparing a high-temperature warning phase-change ball containing irritant gas as claimed in claim 2, wherein the irritant gas with pressure is filled into the spherical telescopic film in step S1, and the pressure is 1-10 kPa higher than the standard atmospheric pressure.
5. The method for preparing a high-temperature warning phase change ball containing irritant gas as claimed in claim 2, wherein the phase change material is coated to a thickness of 0.5-5 mm in step S2.
6. The method for preparing a high-temperature warning phase-change ball containing irritant gas as claimed in claim 2, wherein the heating temperature of the metal needle in step S4 is 2-10 ℃ higher than the melting point temperature of the phase-change material.
7. The method for preparing a phase change ball containing a pungent gas in claim 2, wherein the retraction direction of the metal needle in step S6 is a direction away from the center of the phase change ball, and the retraction speed is 0.1-0.5 mm/S.
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Cited By (1)
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| CN113317760A (en) * | 2021-05-27 | 2021-08-31 | 江南大学 | Olfactory disorder detection kit and preparation method thereof |
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