阅读说明：本技术 一种真空浸渍方法 (Vacuum impregnation method ) 是由 冯晓宏 于 2020-11-25 设计创作，主要内容包括：本发明公开了一种真空浸渍方法,属于真空浸渍技术领域。步骤如下：一、预加热,对电容器进行加热；二、装罐,将加热后的电容器放入罐体内的浸渍槽中；三、抽真空,启动真空单元,使罐体内保持负压状态；四、充气,对罐体内充入氩气；五、加热,对罐体内进行加热；六、二次抽真空,启动真空单元,控制罐体内的真空度在8Pa以下；七、注液浸渍,向电容器注入电解液,使其浸渍10~13小时,浸渍期间恒压恒温；八、取出,停止对罐体加热,待罐体恢复到常温常压状态后取出电容器。本发明的真空浸渍方法,工艺简单,浸渍效果好,且浸渍效率高,产品性能有所提高。(The invention discloses a vacuum impregnation method, and belongs to the technical field of vacuum impregnation. The method comprises the following steps: firstly, preheating, namely heating a capacitor; secondly, canning, namely putting the heated capacitor into a dipping tank in a can body; vacuumizing, and starting a vacuum unit to keep the interior of the tank body in a negative pressure state; fourthly, inflating, namely inflating argon into the tank body; fifthly, heating, namely heating the tank body; sixthly, secondary vacuum pumping is carried out, a vacuum unit is started, and the vacuum degree in the tank body is controlled to be below 8 Pa; injecting liquid for dipping, namely injecting electrolyte into the capacitor to dip the capacitor for 10-13 hours, wherein the constant pressure and the constant temperature are kept during dipping; and eighthly, taking out, stopping heating the tank body, and taking out the capacitor after the tank body is restored to the normal temperature and normal pressure state. The vacuum impregnation method has the advantages of simple process, good impregnation effect, high impregnation efficiency and improved product performance.)

1. A vacuum impregnation method is characterized by comprising the following steps:

firstly, preheating, namely heating a capacitor;

secondly, canning, namely putting the heated capacitor into a dipping tank in a can body;

vacuumizing, and starting a vacuum unit to keep the interior of the tank body in a negative pressure state;

fourthly, inflating, namely inflating argon into the tank body;

fifthly, heating, namely heating the tank body;

sixthly, secondary vacuum pumping is carried out, a vacuum unit is started, and the vacuum degree in the tank body is controlled to be below 8 Pa;

injecting liquid for dipping, namely injecting electrolyte into the capacitor to dip the capacitor for 10-13 hours, wherein the constant pressure and the constant temperature are kept during dipping;

and eighthly, taking out, stopping heating the tank body, and taking out the capacitor after the tank body is restored to the normal temperature and normal pressure state.

2. A vacuum impregnation process according to claim 1, wherein: in the first step, the heating temperature is 130-150 ℃; the vacuum degree in the negative pressure state in the third step is less than 9 Pa; in the fifth step, the heating temperature is 130-150 ℃.

3. A vacuum impregnation method according to claim 2, characterized in that the vacuum impregnation is carried out on the basis of a vacuum impregnation tank comprising:

a tank body;

the dipping tank is arranged in the tank body and is used for accommodating the capacitor and the electrolyte;

the liquid injection unit is positioned outside the tank body, is communicated with the inside of the tank body, stores electrolyte and injects liquid into the impregnation tank;

the vacuum unit is positioned outside the tank body, is communicated with the inside of the tank body and provides a negative pressure environment for the inside of the tank body;

the inflation unit is positioned outside the tank body, is communicated with the inside of the tank body and inflates the inside of the tank body;

and a heating unit which supplies heat to the inside of the tank body.

4. A vacuum impregnation process according to claim 3, wherein: and a liquid level meter is arranged on the dipping tank and is used for detecting the height of the electrolyte in the dipping tank.

5. A vacuum impregnation process according to claim 4, wherein: a detachable interlayer is arranged in the impregnation tank; the interlayer is of a hollow structure.

Technical Field

The invention belongs to the technical field of vacuum impregnation, and particularly relates to a vacuum impregnation method.

Background

In the production process of the capacitor, vacuum impregnation is an important necessary process, the capacitor is placed in a vacuum environment through the vacuum impregnation process, air and volatile matters inside the coil are removed, certain pressure is applied to the impregnation paint liquid after the vacuum is removed by depending on the gravity of the paint liquid in the vacuum environment and the capillary action of the coil, and dry compressed air or inert gas, so that the paint liquid quickly permeates and fills the inside of the insulating structure, and the process is greatly helpful for improving the electrical performance of the capacitor.

At present, the common capacitor vacuum impregnation treatment is to place the capacitor in a vacuum tank, and adopts treatment methods such as double-pumping single-injection and group-pumping single-injection, and the like, so that the process is complex, and the adopted equipment is huge and has high cost.

Disclosure of Invention

In order to solve at least one of the above technical problems, according to an aspect of the present invention, there is provided a vacuum impregnation method, the apparatus including: the method comprises the following steps:

firstly, preheating, namely heating a capacitor;

secondly, canning, namely putting the heated capacitor into a dipping tank in a can body;

vacuumizing, and starting a vacuum unit to keep the interior of the tank body in a negative pressure state;

fourthly, inflating, namely inflating argon into the tank body;

fifthly, heating, namely heating the tank body;

sixthly, secondary vacuum pumping is carried out, a vacuum unit is started, and the vacuum degree in the tank body is controlled to be below 8 Pa;

injecting liquid for dipping, namely injecting electrolyte into the capacitor to dip the capacitor for 10-13 hours, wherein the constant pressure and the constant temperature are kept during dipping;

and eighthly, taking out, stopping heating the tank body, and taking out the capacitor after the tank body is restored to the normal temperature and normal pressure state.

According to the vacuum impregnation method provided by the embodiment of the invention, optionally, the heating temperature in the first step is 130-150 ℃; the vacuum degree in the negative pressure state in the third step is less than 9 Pa; in the fifth step, the heating temperature is 130-150 ℃.

According to an embodiment of the present invention. Vacuum impregnation method, optionally based on vacuum impregnation tanks, comprising:

a tank body;

the dipping tank is arranged in the tank body and is used for accommodating the capacitor and the electrolyte;

the liquid injection unit is positioned outside the tank body, is communicated with the inside of the tank body, stores electrolyte and injects liquid into the impregnation tank;

the vacuum unit is positioned outside the tank body, is communicated with the inside of the tank body and provides a negative pressure environment for the inside of the tank body;

the inflation unit is positioned outside the tank body, is communicated with the inside of the tank body and inflates the inside of the tank body;

and a heating unit which supplies heat to the inside of the tank body.

According to an embodiment of the present invention. In the vacuum impregnation method, optionally, a liquid level meter is arranged on the impregnation tank, and the height of the electrolyte in the impregnation tank is detected.

According to an embodiment of the present invention. Vacuum impregnation method, optionally, a detachable interlayer is arranged in the impregnation tank; the interlayer is of a hollow structure.

Advantageous effects

Compared with the prior art, the invention has at least the following beneficial effects:

(1) the vacuum impregnation method has the advantages of simple process, good impregnation effect, high impregnation efficiency and improved product performance;

(2) the vacuum impregnation tank used in the vacuum impregnation method has simple structure and low equipment cost, and can conveniently realize the impregnation treatment operation of the capacitor;

(3) according to the vacuum impregnation method, the liquid level meter is arranged in the impregnation tank, so that the height of the electrolyte in the impregnation tank can be monitored in real time, and the situation that the electrolyte overflows or is insufficient is avoided;

(4) according to the vacuum impregnation method, the interlayer is arranged, so that the impregnation tank can perform impregnation operation on more capacitors, the treatment efficiency is further improved, and the interlayer with the hollow structure facilitates the circulation of electrolyte in the impregnation tank.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.

FIG. 1 shows a schematic view of an apparatus used in the vacuum impregnation method of the present invention;

FIG. 2 shows a schematic internal view of the tank of the apparatus used in the vacuum impregnation method of the present invention;

FIG. 3 shows a flow diagram of a vacuum impregnation method of the present invention;

reference numerals:

1. a tank body;

2. an impregnation tank; 20. a liquid level meter; 21. an interlayer;

3. a liquid injection unit;

4. a vacuum unit;

5. an inflation unit;

6. a heating unit.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Example 1

The flow of the vacuum impregnation method of this embodiment is shown in fig. 3, and the steps are as follows:

preheating, namely heating the capacitor at the heating temperature of 130-150 ℃, performing primary drying treatment on the capacitor and removing limit on electrolytic paper;

secondly, canning, namely putting the heated capacitor into an impregnation tank 2 in the tank body 1;

vacuumizing, and starting the vacuum unit 4 to keep the vacuum degree in the tank body 1 below 9 Pa;

fourthly, inflating, namely inflating argon into the tank body 1;

fifthly, heating, namely heating the interior of the tank body 1 at the temperature of 130-150 ℃;

sixthly, secondary vacuum pumping is carried out, the vacuum unit 4 is started, and the vacuum degree in the tank body 1 is controlled to be below 8 Pa;

injecting liquid for dipping, namely injecting electrolyte into the capacitor to dip the capacitor for 10-13 hours, wherein the constant pressure and the constant temperature are kept during dipping;

eighthly, taking out, stopping heating the tank body 1, and taking out the capacitor after the tank body 1 is restored to the normal temperature and normal pressure state.

Example 2

The vacuum impregnation method of this embodiment is further improved on the basis of embodiment 1, and vacuum impregnation is performed based on the following vacuum impregnation tank, including:

a tank body 1;

an immersion tank 2 provided inside the tank 1 and configured to accommodate a capacitor and an electrolyte;

the liquid injection unit 3 is positioned outside the tank body 1, is communicated with the interior of the tank body 1, stores electrolyte and injects the electrolyte into the impregnation tank 2;

the vacuum unit 4 is positioned outside the tank body 1, is communicated with the inside of the tank body 1, and provides a negative pressure environment for the inside of the tank body 1;

the inflation unit 5 is positioned outside the tank body 1, is communicated with the interior of the tank body 1, and inflates air into the tank body 1;

and a heating unit 6 which supplies heat to the inside of the can body 1.

As shown in fig. 1 and 2, a dipping tank 2 is arranged in a tank body 1, the dipping tank 2 is arranged at the bottom of the tank body 1, and the dipping process of the capacitor is completed in the dipping tank 2, so that compared with the existing vacuum dipping tank which is used for directly dipping in the tank body 1, the vacuum dipping tank is easier to maintain in the later use process; further, the liquid injection unit 3 comprises an electrolyte storage tank and a liquid injection pipe for communicating the liquid storage tank with the interior of the tank body 1, and the electrolyte is injected into the impregnation tank 2 and the capacitor shell through the liquid injection unit 3; the vacuum unit 4 comprises a vacuum pump and a connecting pipeline, the connecting pipeline connects the vacuum pump with the interior of the tank body 1, and a vacuum negative pressure environment in the tank body 1 is created; the inflation unit 5 comprises a gas storage tank and a gas pipe, and the gas pipe connects the gas storage tank with the tank body 1; the heating unit 6 of this embodiment is the zone of heating of parcel at jar body 1 surface, only has the heating wire in the zone of heating, provides the heat to jar body 1 inside through the heating wire heating.

The vacuum impregnation tank has the advantages of simple structure, low equipment cost and convenience in impregnation treatment operation of the capacitor.

Example 3

The vacuum impregnation method of the embodiment is further improved on the basis of the embodiment 2, wherein a liquid level meter 20 is arranged on the impregnation tank 2, and the height of the electrolyte in the impregnation tank 2 is detected.

As shown in fig. 2, in the present embodiment, the liquid level meter 20 is disposed in the dipping tank 2, and the liquid level meter 20 is in signal connection with the liquid injection unit 3, so that the height of the electrolyte in the dipping tank 2 can be monitored in real time, and the electrolyte overflow or the electrolyte shortage can be avoided.

Example 4

The vacuum impregnation method of the embodiment is further improved on the basis of the embodiment 3, and a detachable interlayer 21 is arranged in the impregnation tank 2; the interlayer 21 is of a hollow structure.

As shown in fig. 2, a detachable barrier 21 is provided, the capacitor can be prevented from being placed on the barrier 21, and then the capacitor can be placed in the tank body 1, and the barrier 21 is provided, so that the impregnation tank 2 can perform impregnation operation on more capacitors, and the treatment efficiency is further increased; the interlayer 21 with the hollow structure facilitates the circulation of electrolyte in the impregnation tank 2.

The examples described herein are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention.