CN110504141B - Manufacturing method of EV fuse - Google Patents
Manufacturing method of EV fuse Download PDFInfo
- Publication number
- CN110504141B CN110504141B CN201910778525.0A CN201910778525A CN110504141B CN 110504141 B CN110504141 B CN 110504141B CN 201910778525 A CN201910778525 A CN 201910778525A CN 110504141 B CN110504141 B CN 110504141B
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- parts
- sand
- quartz sand
- fuse
- solidified
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/18—Casing fillings, e.g. powder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/18—Casing fillings, e.g. powder
- H01H85/185—Insulating members for supporting fusible elements inside a casing, e.g. for helically wound fusible elements
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to a manufacturing method of an EV fuse, which comprises the following steps: uniformly mixing and stirring the raw materials to obtain solidified sand, wherein the solidified sand comprises the following components in parts by mass: 95-99 parts of mixed quartz sand, 0.5-1 part of curing agent and 0.5-2 parts of water, wherein the mixed quartz sand comprises the following components in parts by mass: 35 to 45 parts of 70-mesh quartz sand, 20 to 30 parts of 60-mesh quartz sand, 20 to 30 parts of 50-mesh quartz sand and 5 to 15 parts of 40-mesh quartz sand; and curing the cured sand, placing the cured sand in a fuse shell, placing the fuse shell in curing equipment, and adding high-temperature water vapor into the fuse shell by the curing equipment under the pressure of 0.05bar to 0.15 bar.
Description
Technical Field
The invention relates to the field of manufacturing of EV fuses, in particular to a manufacturing method of an EV fuse.
Background
The fuse is widely applied to low-voltage distribution systems, control systems and electric equipment, serves as short-circuit and overcurrent protection, and is one of the most commonly applied protection devices. The fuse is mainly composed of a fuse body, a fusion tube and additional filler, and is connected in series in a protected circuit in the working process. When the current of the protected circuit exceeds the specified value for a period of time, the melt is fused by the heat generated by the melt, so that the circuit is disconnected, and the circuit is protected. When the overload current is small, the fusing time is long, and when the overload current is large, the fusing time is short. The fuse can not be fused within the overload current range until the current returns to normal, and can be continuously used. The melt is a key element for controlling the fusing characteristics.
However, as fuses continue to be developed, the stability of fuse protection circuits continues to increase, and fuses are used in a variety of environments and situations. However, the conventional fuse is often poor in anti-vibration capability, low in working performance in a vibration environment, and incapable of meeting the high-performance requirement on the fuse in a special environment.
Disclosure of Invention
Therefore, it is necessary to provide a method for manufacturing an EV fuse in order to solve the technical problem that the conventional fuse has poor shock resistance.
A manufacturing method of an EV fuse comprises the following steps:
uniformly mixing and stirring the raw materials to obtain solidified sand, wherein the solidified sand comprises the following components in parts by mass: 95-99 parts of mixed quartz sand, 0.5-1 part of curing agent and 0.5-2 parts of water, wherein the mixed quartz sand comprises the following components in parts by mass: 35 to 45 parts of 70-mesh quartz sand, 20 to 30 parts of 60-mesh quartz sand, 20 to 30 parts of 50-mesh quartz sand and 5 to 15 parts of 40-mesh quartz sand;
and curing the cured sand, placing the cured sand in a fuse shell, placing the fuse shell in curing equipment, and adding high-temperature water vapor into the fuse shell by the curing equipment under the pressure of 0.05bar to 0.15 bar.
In one embodiment, in the step of subjecting the solidified sand to a solidification process, the solidification device adds high-temperature water vapor into the fuse housing at a pressure of 0.08 to 0.12 bar.
In one embodiment, in the step of subjecting the solidified sand to a solidification process, the solidification apparatus adds high-temperature water vapor into the fuse housing at a pressure of 0.1 bar.
In one embodiment, the curing agent comprises sodium silicate and potassium silicate.
In one embodiment, the mixed quartz sand comprises the following components in parts by mass: 37 to 42 parts of 70-mesh quartz sand, 22 to 28 parts of 60-mesh quartz sand, 22 to 28 parts of 50-mesh quartz sand and 8 to 12 parts of 40-mesh quartz sand.
In one embodiment, the mixed quartz sand comprises the following components in parts by mass: 40 parts of 70-mesh quartz sand, 25 parts of 60-mesh quartz sand, 25 parts of 50-mesh quartz sand and 10 parts of 40-mesh quartz sand.
In one embodiment, in the step of uniformly mixing and stirring the raw materials to obtain the solidified sand, the raw materials comprise the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water, and stirring at the temperature of 60 to 70 ℃ for 1.5 to 3 hours to obtain the cured sand.
In one embodiment, in the step of uniformly mixing and stirring the raw materials to obtain the solidified sand, the raw materials comprise the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water, and stirring at the temperature of 62 to 68 ℃ for 1.5 to 3 hours to obtain the cured sand.
In one embodiment, in the step of uniformly mixing and stirring the raw materials to obtain the solidified sand, the raw materials comprise the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water at the temperature of 65 ℃ and stirring for 2 hours to obtain the cured sand.
In one embodiment, in the step of subjecting the solidified sand to a solidification treatment, the solidified sand is reacted in the solidification apparatus for 4 to 5 hours.
In the manufacturing method of the EV fuse, the proportion of quartz sand with larger particles in various used quartz sands is larger than that of quartz sand with larger particles in the traditional method, and the proportion of quartz sand with smaller particles is reduced. The gaps among the quartz sand with larger particles are larger, so that the contact area of the quartz sand with the water vapor and the curing agent is increased, and the full reaction of the quartz sand with the water vapor and the curing agent is facilitated. The solidification effect of the solidified sand is greatly improved, so that the anti-vibration performance of the EV fuse is improved. The abrasion to the interior of the EV fuse caused by the fact that quartz sand with fine particles is separated from a melt in the vibration process is avoided, and therefore the service life of the EV fuse is prolonged. In addition, the EV fuse obtained by the manufacturing method of the EV fuse has better arc extinguishing effect than the EV fuse, and the breaking capacity of the EV fuse is greatly improved.
Drawings
Fig. 1 is a schematic flowchart of a method for manufacturing an EV fuse in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a method for manufacturing an EV fuse, which includes the following steps:
step 101: the raw materials are mixed and stirred uniformly to obtain the solidified sand.
Specifically, the solidified sand comprises the following components in parts by mass: 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water are mixed. The mixed quartz sand comprises the following components in parts by mass: 35 to 45 parts of 70-mesh quartz sand, 20 to 30 parts of 60-mesh quartz sand, 20 to 30 parts of 50-mesh quartz sand and 5 to 15 parts of 40-mesh quartz sand.
The quartz sand is a hard, wear-resistant and chemically stable silicate mineral, and the main mineral component of the quartz sand is SiO 2. In this example, the curing agents include sodium silicate and potassium silicate. Further, the main component of the curing agent is sodium silicate. Sodium silicate, also known as natron, is a water-soluble silicate. The water solution formed by the reaction of sodium silicate and water is called water glass, which is an ore binder. Potassium silicate is a viscous liquid of hyaluronic acid in a stable state. The water contained in the solidified sand is purified water.
The water in the solidified sand reacts with the curing agent to form a binder, and the binder binds quartz sands with different particle sizes together to form blocky solidified sand. It should be noted that the conventional solidified sand contains a large proportion of mixed silica sand with smaller particles, and the mixed silica sand contains smaller particles of silica sand. However, the gaps between the quartz sands with smaller particles are smaller, which results in a small contact area between the quartz sand and the steam and the curing agent, and is not favorable for the sufficient reaction between the quartz sand and the steam and the curing agent, thereby affecting the curing effect of the cured sand. The ratio of the quartz sand with larger particles in the solidified sand obtained in the step 101 is larger than that of the quartz sand with larger particles in the traditional method, the gaps among the quartz sand with larger particles are larger, the contact area of the quartz sand with the water vapor and the curing agent is increased, and the full reaction of the quartz sand with the water vapor and the curing agent is facilitated. The solidification effect of the solidified sand is greatly improved, so that the anti-vibration performance of the EV fuse is improved.
Step 102: and carrying out curing treatment on the cured sand.
Specifically, the solidified sand is placed in a fuse housing, the fuse housing is placed in a solidifying device, the solidifying device adds high-temperature water vapor into the fuse housing under the pressure of 0.05bar to 0.15bar, and the EV fuse is obtained in the fuse housing.
Where fuse housing refers to the housing of an EV fuse containing a melt, it is understood that the fuse housing is an EV fuse lacking solidified sand. The solidified sand is placed in the fuse shell, so that the solidified sand obtained through reaction is solidified and formed in the fuse shell, and the solidified sand obtained through reaction can meet the requirements of the EV fuse on the shape and the size. The curing device is a container in which the fuse housing is placed. The curing equipment provides a place for the completion of curing of the cured sand.
The curing device adds high-temperature water vapor into the fuse housing under a pressure of 0.05bar to 0.15bar, and the high-temperature water vapor is introduced into the fuse housing. On one hand, the temperature in the curing equipment is improved, and a temperature condition is created for the curing reaction of the cured sand and the water vapor. On the other hand, the high-temperature water vapor facilitates the reaction with the solidified sand in the fuse housing to produce solidified sand for the EV fuse in a solid state. The solidified sand in the fuse shell is condensed into a whole under the action of high-temperature and high-pressure water vapor, and the solidified sand for the EV fuse in a solid state is formed by solidification and is connected with the fuse shell to form the EV fuse. It should be noted that the minimum temperature of the water vapor is 100 degrees celsius, that is, the temperature in the curing apparatus is not lower than 100 degrees celsius.
In the manufacturing method of the EV fuse, the proportion of quartz sand with larger particles in various used quartz sands is larger than that of quartz sand with larger particles in the traditional method, and the proportion of quartz sand with smaller particles is reduced. The gaps among the quartz sand with larger particles are larger, so that the contact area of the quartz sand with the water vapor and the curing agent is increased, and the full reaction of the quartz sand with the water vapor and the curing agent is facilitated. The solidification effect of the solidified sand is greatly improved, so that the anti-vibration performance of the EV fuse is improved. The abrasion to the interior of the EV fuse caused by the fact that quartz sand with fine particles is separated from a melt in the vibration process is avoided, and therefore the service life of the EV fuse is prolonged. In addition, the EV fuse obtained by the manufacturing method of the EV fuse has an arc extinguishing effect superior to that of a traditional fuse, and the breaking capacity of the EV fuse is greatly improved.
In order to improve the solidification effect of the solidified sand in the fuse housing in the solidification device, in one embodiment, in the step 101 of performing solidification treatment on the solidified sand, the solidification device adds high-temperature water vapor into the fuse housing under a pressure of 0.08bar to 0.12 bar. In another embodiment, in the step 101 of subjecting the solidified sand to a solidifying process, the solidifying device adds high-temperature water vapor into the fuse housing at a pressure of 0.1 bar. It should be noted that, by adding high-temperature water vapor into the fuse housing under a pressure of 0.1bar, on one hand, it can be ensured that the water vapor can enter the fuse housing as much as possible to contact with the solidified sand, and specifically, it can be ensured that the water vapor can contact with the quartz sand in the solidified sand as much as possible. The curing effect of the cured sand in the fuse shell is improved. On the other hand, the water vapor with moderate pressure does not extrude and deform the solidified sand in the fuse shell, so that the structural stability of the EV fuse is prevented from being influenced. Further, in the step 101 of subjecting the solidified sand to a solidification process, the solidified sand is reacted in a solidification apparatus for 4 to 5 hours. Specifically, the solidified sand was reacted in the solidifying apparatus for 4 hours and 40 minutes. The solidified sand is reacted in the solidifying equipment for 4 to 5 hours, so that the solidified sand in the fuse shell is fully contacted with high-temperature and high-pressure steam, and the solidified sand in the fuse shell has a better solidifying effect. Thus, the curing device can better enable the curing sand in the fuse shell to be cured, so that the curing effect of the curing sand in the fuse shell is improved.
In order to improve the reaction effect of the mixed quartz sand, the curing agent and the water, in one embodiment, the mixed quartz sand comprises the following components in parts by mass: 37 to 42 parts of 70-mesh quartz sand, 22 to 28 parts of 60-mesh quartz sand, 22 to 28 parts of 50-mesh quartz sand and 8 to 12 parts of 40-mesh quartz sand. In another embodiment, the mixed quartz sand comprises the following components in parts by mass: 40 parts of 70-mesh quartz sand, 25 parts of 60-mesh quartz sand, 25 parts of 50-mesh quartz sand and 10 parts of 40-mesh quartz sand. It should be noted that the ratio of the quartz sand with larger particles is increased in the mixed quartz sand. However, the gaps among the quartz sand with larger particles are larger, so that the contact area of the quartz sand with the water vapor and the curing agent is increased, and the full reaction of the quartz sand with the water vapor and the curing agent is facilitated. The solidification effect of the quartz sand is greatly improved, so that the anti-vibration performance of the EV fuse is improved. The abrasion to the interior of the EV fuse caused by the fact that quartz sand with fine particles is separated from a melt in the vibration process is avoided, and therefore the service life of the EV fuse is prolonged. In addition, the arc extinguishing effect of the melt obtained by the reaction of the mixed quartz sand with the large-particle quartz sand proportion is better than that of the traditional melt, and the breaking capacity of the EV fuse is greatly improved. Therefore, the reaction effect of the mixed quartz sand, the curing agent and water is improved by adding the mixed quartz sand with the large-particle quartz sand proportion.
In order to improve the mixing and stirring effect of the raw materials and thus improve the quality of the solidified sand, in one embodiment, in the step 101 of uniformly mixing and stirring the raw materials to obtain the solidified sand, the following components in parts by mass are added: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water, and stirring at the temperature of 60 to 70 ℃ for 1.5 to 3 hours to obtain the cured sand. In one embodiment, in step 101 of uniformly mixing and stirring raw materials to obtain solidified sand, mixing the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water, and stirring at the temperature of 62 to 68 ℃ for 1.5 to 3 hours to obtain the cured sand. In one embodiment, in step 101 of uniformly mixing and stirring raw materials to obtain solidified sand, mixing the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water at the temperature of 65 ℃ and stirring for 2 hours to obtain the cured sand. The effect of mixing and stirring the mixed quartz sand, the curing agent and the water at the temperature of 60-70 ℃ is good, and on one hand, the mixed quartz sand is beneficial to fully contacting the curing agent and the water. On the other hand, the adhesive formed by the reaction of the curing agent and water is prevented from being too viscous in a low-temperature environment, so that the mixing effect of the adhesive and the mixed quartz sand is influenced. Further, in the step 101 of mixing and stirring the raw materials uniformly to obtain the solidified sand, the raw materials comprise the following components in parts by mass: 97 to 99 parts of mixed quartz sand, 0.7 to 0.9 part of curing agent and 0.8 to 1.5 parts of water are mixed and stirred for 2 hours at the temperature of 65 ℃ to obtain the cured sand. Specifically, in step 101 of uniformly mixing and stirring raw materials to obtain solidified sand, mixing the following components in parts by mass: 98.2 parts of mixed quartz sand, 08 parts of curing agent and 1 part of water are mixed and stirred for 2 hours at the temperature of 65 ℃ to obtain the cured sand. The hardness of the solidified sand obtained by mixing and reacting the mixed quartz sand, the curing agent and the water according to the proportion is moderate, so that the solidification, shaping and processing treatment of the solidified sand at the later stage is facilitated.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of making an EV fuse, the method comprising the steps of:
uniformly mixing and stirring the raw materials to obtain solidified sand, wherein the solidified sand comprises the following components in parts by mass: 95-99 parts of mixed quartz sand, 0.5-1 part of curing agent and 0.5-2 parts of water, wherein the mixed quartz sand comprises the following components in parts by mass: 35 to 45 parts of 70-mesh quartz sand, 20 to 30 parts of 60-mesh quartz sand, 20 to 30 parts of 50-mesh quartz sand and 5 to 15 parts of 40-mesh quartz sand;
and curing the cured sand, placing the cured sand in a fuse shell, placing the fuse shell in curing equipment, and adding high-temperature water vapor into the fuse shell by the curing equipment under the pressure of 0.05bar to 0.15 bar.
2. The method according to claim 1, wherein in the step of subjecting the solidified sand to the solidification process, the solidification apparatus adds high-temperature water vapor into the fuse housing at a pressure of 0.08 to 0.12 bar.
3. The method according to claim 1, wherein in the step of subjecting the solidified sand to a solidification process, the solidification apparatus adds high-temperature water vapor into the fuse housing at a pressure of 0.1 bar.
4. The method of claim 1, wherein the curing agent comprises sodium silicate and potassium silicate.
5. The method according to claim 1, wherein the mixed quartz sand comprises the following components in parts by mass: 37 to 42 parts of 70-mesh quartz sand, 22 to 28 parts of 60-mesh quartz sand, 22 to 28 parts of 50-mesh quartz sand and 8 to 12 parts of 40-mesh quartz sand.
6. The method according to claim 1, wherein the mixed quartz sand comprises the following components in parts by mass: 40 parts of 70-mesh quartz sand, 25 parts of 60-mesh quartz sand, 25 parts of 50-mesh quartz sand and 10 parts of 40-mesh quartz sand.
7. The method according to claim 1, wherein in the step of uniformly mixing and stirring the raw materials to obtain the solidified sand, the raw materials comprise the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water, and stirring at the temperature of 60 to 70 ℃ for 1.5 to 3 hours to obtain the cured sand.
8. The method according to claim 1, wherein in the step of uniformly mixing and stirring the raw materials to obtain the solidified sand, the raw materials comprise the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water, and stirring at the temperature of 62 to 68 ℃ for 1.5 to 3 hours to obtain the cured sand.
9. The method according to claim 1, wherein in the step of uniformly mixing and stirring the raw materials to obtain the solidified sand, the raw materials comprise the following components in parts by mass: mixing 95 to 99 parts of quartz sand, 0.5 to 1 part of curing agent and 0.5 to 2 parts of water at the temperature of 65 ℃ and stirring for 2 hours to obtain the cured sand.
10. The method according to claim 1, wherein in the step of subjecting the solidified sand to the solidification treatment, the solidified sand is reacted in the solidification apparatus for 4 to 5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910778525.0A CN110504141B (en) | 2019-08-22 | 2019-08-22 | Manufacturing method of EV fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910778525.0A CN110504141B (en) | 2019-08-22 | 2019-08-22 | Manufacturing method of EV fuse |
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| CN110504141A CN110504141A (en) | 2019-11-26 |
| CN110504141B true CN110504141B (en) | 2021-06-18 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013258013A (en) * | 2012-06-12 | 2013-12-26 | Murata Mfg Co Ltd | Fuse |
| CN104319193B (en) * | 2014-10-17 | 2016-03-30 | 东莞市博钺电子有限公司 | Fast acting fuse production technology |
| CN105884292A (en) * | 2015-01-06 | 2016-08-24 | 奥恒科技（西安）有限公司 | New method for curing fuse quartz sand |
| CN105679622B (en) * | 2016-02-26 | 2017-10-31 | 广东中贝能源科技有限公司 | A kind of quartz sand fuse and its manufacture method |
| CN109734409A (en) * | 2019-03-08 | 2019-05-10 | 上海电器陶瓷厂有限公司 | The curing method of quartz sand in a kind of low-voltage fuse body |
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