阅读说明：本技术 密闭空间电绝缘气体填充与回收的方法及填充装置 (Method and device for filling and recovering electric insulating gas in closed space ) 是由 陈维青 张国伟 李士刚 于 2020-07-01 设计创作，主要内容包括：本发明涉及一种密闭空间气体填充与回收的方法及填充装置,特别涉及一种密闭空间电绝缘气体填充与回收的方法及填充装置,解决了采用现有的填充与回收方法,填充与回收耗时长、工序繁琐、气体易泄漏及成本高的问题。该方法特殊之处在于,包括以下步骤：步骤1：制作多个内腔中填充有电绝缘气体的填充块,填充块壳体由电绝缘材料制成；步骤2：电绝缘气体填充；步骤2.1：使用步骤1制作的多个填充块填充密闭空间；步骤2.2：使用电绝缘气体填充多个填充块之间的缝隙,实现密闭空间电绝缘气体的填充；步骤3：电绝缘气体回收；将填充块取出,实现密闭空间内电绝缘气体的回收。本发明还提供了一种密闭空间电绝缘气体填充装置及一种高电压设备。(The invention relates to a method and a device for filling and recovering gas in a closed space, in particular to a method and a device for filling and recovering electrically insulating gas in a closed space, which solve the problems of long filling and recovering time consumption, complex working procedures, easy gas leakage and high cost in the conventional filling and recovering method. The method is characterized by comprising the following steps: step 1: manufacturing filling blocks with a plurality of inner cavities filled with electric insulating gas, wherein the filling block shells are made of electric insulating materials; step 2: filling with an electrically insulating gas; step 2.1: filling the closed space with the plurality of filling blocks manufactured in the step 1; step 2.2: filling gaps among the plurality of filling blocks with an electric insulating gas to realize the filling of the electric insulating gas in the closed space; and step 3: recovering the electric insulating gas; and taking out the filling block to realize the recovery of the electric insulating gas in the closed space. The invention also provides an electric insulation gas filling device for the closed space and high-voltage equipment.)

1. A method for filling and recovering electric insulating gas in a closed space is characterized by comprising the following steps:

step 1: manufacturing a filling block (1) with a plurality of inner cavities filled with electric insulating gas, wherein a shell of the filling block (1) is made of an electric insulating material;

step 2: electrically insulating gas filling

Step 2.1: filling the closed space (2) with the plurality of filling blocks (1) manufactured in the step (1);

step 2.2: filling gaps among the plurality of filling blocks (1) with an electrically insulating gas to realize the filling of the electrically insulating gas in the closed space (2);

and step 3: electrical insulation gas recovery

The filling block (1) is taken out to realize the recovery of the electric insulation gas in the closed space (2).

2. The method for filling and recovering an electrically insulating gas in a closed space according to claim 1, wherein:

in the step 1, the shape of the filling blocks (1) is a cuboid and/or a spherical body and/or a special-shaped body matched with the shape of the corner position of the closed space (2).

3. The method for filling and recovering an electrically insulating gas in a closed space according to claim 2, wherein:

in step 2.1, the filling blocks (1) with the same shape have the same volume, or the filling blocks (1) with the same shape have a plurality of specifications.

4. The method for filling and recovering the electrically insulating gas in the closed space according to claim 2, wherein the step 2.1 is specifically:

the middle part of the closed space (2) is filled by a plurality of cuboid filling blocks (1), and then the corner positions are filled by spherical bodies or special-shaped bodies matched with the corner positions of the closed space (2) in shape.

5. The method for filling and recovering an electrically insulating gas in a closed space according to claim 4, wherein: the shell of the filling block (1) is made of elastic material.

6. The method for filling and recovering an electrically insulating gas in a closed space according to claim 1, wherein: the electrically insulating gas is sulfur hexafluoride gas.

7. The method for filling and recovering an electrically insulating gas in a closed space according to any one of claims 1 to 6, wherein:

in the step 3, the electric insulating gas in the gaps among the plurality of filling blocks (1) is recovered, and then the filling blocks (1) are taken out.

8. The utility model provides an airtight space electrical insulation gas filling device which characterized in that:

comprises a plurality of filling blocks (1);

the shell of the filling block (1) is made of an electric insulating material, and an inner cavity of the shell is filled with electric insulating gas.

9. The enclosed space electrical insulating gas filling apparatus according to claim 8, wherein:

the shapes of the filling blocks (1) are cuboids and/or spherical bodies and/or special-shaped bodies matched with the corner positions of the closed space (2);

the filling blocks (1) with the same shape have the same volume, or the filling blocks (1) with the same shape have various specifications.

10. A high voltage apparatus comprising an apparatus arranged in a closed space (2); the method is characterized in that:

the device also comprises a plurality of filling blocks (1) arranged in the closed space (2);

the shell of the filling block (1) is made of an electric insulating material, and an inner cavity of the shell is filled with electric insulating gas.

Technical Field

The invention relates to a method and a device for filling and recovering gas in a closed space, in particular to a method and a device for filling and recovering electrically insulating gas in a closed space.

Background

In high voltage equipment, sulfur hexafluoride (SF) is often used₆) And filling the gas serving as an insulating filling medium into the closed space so as to improve the breakdown voltage or the surface flashover voltage of the equipment. Some of these gases, which are used as insulating filling media, are very expensive and need to be recycled; some cause air pollution and do not allow direct discharge. Taking the most commonly used sulfur hexafluoride gas as an example, each kilogram of gas has a value of about 100 yuan, and sulfide is easily generated in the discharge process, so that the sulfur hexafluoride gas has strong pollution. The conventional practice in the industry at present is to recycle sulfur hexafluoride gas by using a recovery device, but the filling and recovery by using the existing filling and recovery method have many defects:

firstly, the method comprises the following steps: the time required for filling and recovering is longer;

II, secondly: the filling and recovery processes are complicated, gas is easy to leak, gas loss and environmental pollution are easy to cause, and the cost is increased;

thirdly, the method comprises the following steps: the recovery method is negative pressure recovery, the requirement on the strength of the sealed cavity container is high, and the cost of the recovery device is increased.

Disclosure of Invention

The invention aims to provide a method and a device for filling and recovering electric insulating gas in a closed space and high-voltage equipment, and aims to solve the technical problems that the existing filling and recovering method is long in filling and recovering time consumption, complex in process, easy in gas leakage and high in cost.

The technical scheme adopted by the invention is that the method for filling and recovering the electric insulating gas in the closed space is characterized by comprising the following steps of:

step 1: manufacturing a filling block with a plurality of inner cavities filled with electric insulating gas, wherein a shell of the filling block is made of an electric insulating material;

step 2: electrically insulating gas filling

Step 2.1: filling the closed space with the plurality of filling blocks manufactured in the step 1;

step 2.2: filling gaps among the plurality of filling blocks with an electric insulating gas to realize the filling of the electric insulating gas in the closed space;

and step 3: electrical insulation gas recovery

And taking out the filling block to realize the recovery of the electric insulating gas in the closed space.

Further, in step 1, the shape of the plurality of filling blocks is a cuboid and/or a spherical body and/or a special-shaped body matched with the shape of the corner position of the sealed space. Therefore, the filling blocks with different shapes can be combined for filling, the filling rate of the filling blocks is improved, and the residual gaps among the filling blocks are smaller.

Further, in step 2.1, the same shape of the filling blocks has the same volume size, or the same shape of the filling blocks has multiple specifications. Therefore, the large space can be filled by the filling blocks with large volumes, and gaps among the large filling blocks are filled by the filling blocks with small volumes, so that the filling rate of the filling blocks is improved.

Further, in order to make the volume of the gap between the filling blocks as small as possible after filling with the filling blocks, that is, the filling rate of filling with the filling blocks is higher, step 2.1 specifically includes:

the middle part of the closed space is filled by a plurality of cuboid filling blocks, and then the corner positions are filled by spherical bodies or special-shaped bodies matched with the corner positions of the closed space in shape. In this way, the gas filled in the gap during recovery does not need to be recovered.

Further, the housing of the filling block is made of an elastic material. Therefore, when the electric insulating gas in the gaps between the filling blocks is recovered, the filling blocks can expand under the action of negative pressure, and the recovery time is short.

Further, the electrically insulating gas is sulfur hexafluoride gas.

Furthermore, in step 3, the electrically insulating gas in the gaps between the plurality of filling blocks is recovered, and then the filling blocks are taken out. Therefore, the gas recovery utilization rate is higher, and the environmental pollution is almost zero.

Secondly, the invention also provides an electric insulation gas filling device for the closed space, which is characterized in that:

comprises a plurality of filling blocks;

the shell of the filling block is made of an electric insulating material, and an inner cavity of the filling block is filled with electric insulating gas.

Furthermore, the shapes of the filling blocks are cuboids and/or spherical bodies and/or special-shaped bodies matched with the shapes of corners of the sealed space;

the filling blocks with the same shape have the same volume size, or the volume size of the filling blocks with the same shape comprises a plurality of specifications. Therefore, the filling blocks in different shapes can be combined for filling, the filling block with large volume is used for filling a large space, the filling block with small volume is used for filling gaps among the large filling blocks, and the filling rate of the filling blocks is improved.

Furthermore, the invention also provides high-voltage equipment, which comprises equipment arranged in the closed space; it is characterized in that:

the device also comprises a plurality of filling blocks arranged in the closed space;

the shell of the filling block is made of an electric insulating material, and an inner cavity of the filling block is filled with electric insulating gas.

The invention has the beneficial effects that:

(1) according to the method for filling and recovering the electric insulating gas in the closed space, during filling, the closed space is filled by using the plurality of filling blocks, and then gaps among the plurality of filling blocks are filled by using the electric insulating gas; when in recovery, the filling block is taken out; the filling and recovery time is short; and because the filling blocks fill most of cavities of the closed space, and the electric insulating gas filled in the gaps among the filling blocks is less, on one hand, the electric insulating gas wasted due to gas leakage is less, the recovery rate is high, the cost is reduced, and the environmental pollution is reduced; on the other hand, compared with the electric insulating gas leaked in the existing filling and recovery method, the electric insulating gas filled in the gaps among the filling blocks can be ignored, and the electric insulating gas filled in the gaps among the filling blocks can not be recovered during recovery, so that higher requirements on the strength of the sealed cavity container can not be provided due to the action of negative pressure, and the cost of the recovery device is reduced; therefore, the invention solves the technical problems of long filling and recovery time consumption, complex working procedures, easy gas leakage and high cost of the existing filling and recovery method. The method for filling and recovering the electric insulating gas in the closed space can realize quick filling and quick recovery of the large-size closed space, reduces leakage, is convenient to transport and store, and has the characteristics of flexibility, quickness in filling and recovering and low cost.

(2) When the invention is preferably recovered, the electric insulation gas in the gaps among the plurality of filling blocks is recovered, and then the filling blocks are taken out, so that the gas recovery utilization rate is higher, and the environmental pollution is almost zero.

(3) According to the invention, the shapes of the filling blocks are preferably cuboids and/or spherical bodies and/or special-shaped bodies matched with the shapes of corners of the sealed space; the filling blocks with the same shape have the same volume, or the filling blocks with the same shape have multiple specifications; thus, after the filling blocks are used for filling, the filling rate of the filling blocks can reach more than 95 percent, even 99 percent, the volume of gaps among the filling blocks is very small, even if the electrically insulating gas filled in the gaps among the filling blocks is not recycled, the waste of the electrically insulating gas is very little, the pollution to the environment is very small, the recycling time can be shortened, and the recycling cost is reduced.

(4) When the method for filling and recovering the electric insulating gas in the closed space is used for filling and recovering the electric insulating gas in the closed space, the beneficial effects of the steps (1) to (3) are achieved, and meanwhile, the insulating performance of the filling block is equivalent to that of the filling block which is directly filled with the electric insulating gas.

Drawings

FIG. 1 is a schematic structural diagram of a method of filling a closed space with a filling block according to the present invention;

the reference numerals in the drawings are explained as follows:

1-filling block, 2-closed space.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the method for filling and recovering the electric insulating gas in the closed space comprises the following steps:

step 1: manufacturing a filling block 1 with a plurality of inner cavities filled with electric insulating gas, wherein a shell of the filling block 1 is made of an electric insulating material;

the electrically insulating gas filled in the inner cavity of the filling block 1 in this embodiment is sulfur hexafluoride gas, and may be other electrically insulating gases besides sulfur hexafluoride gas. The filling block 1 of the present embodiment is a spherical body, and may be a rectangular parallelepiped or a special-shaped body adapted to the shape of the corner of the sealed space 2, besides the spherical body of the present embodiment. The same shape of the filling block 1 may have the same volume or size, or may include a plurality of specifications. During filling, the filling blocks in one or more shapes can be adopted for combined filling, and the filling blocks in the same shape and different volume sizes can also be adopted for filling, so that the filling rate of the filling blocks is improved.

Step 2: electrically insulating gas filling

Step 2.1: filling the closed space 2 with the plurality of filling blocks 1 manufactured in the step 1;

in order to improve the filling rate of the filling blocks, the middle part of the closed space 2 is filled by a plurality of cuboid filling blocks 1, and then the corner positions are filled by spherical bodies or special-shaped bodies matched with the corner positions of the closed space 2 in shape; in short, after filling, the gaps between the plurality of filling blocks 1 are made as small as possible.

Step 2.2: filling gaps among the plurality of filling blocks 1 with an electrically insulating gas to realize the filling of the electrically insulating gas in the closed space 2;

and step 3: electrical insulation gas recovery

The filling block 1 is taken out to realize the recovery of the electrically insulating gas in the closed space 2.

In order to make the gas recycling rate higher and cause almost zero environmental pollution, step 3 preferably first recycles the electrically insulating gas in the gaps between the plurality of filling blocks 1, and then takes out the filling blocks 1. The housing of the filling block 1 may preferably be made of an elastic material. When the electric insulating gas in the gaps between the filling blocks is recovered, the filling blocks can expand under the action of negative pressure, and the recovery time is short.

Secondly, the invention also provides an electric insulating gas filling device for the closed space, which comprises a plurality of filling blocks 1, wherein the shells are made of electric insulating materials, and the inner cavities of the filling blocks are filled with electric insulating gas. The shapes of the filling blocks 1 are preferably cuboids and/or spherical bodies and/or special-shaped bodies matched with the shapes of the corners of the closed space 2; the filling blocks 1 having the same shape have the same volume, or the filling blocks 1 having the same shape have a plurality of specifications.

Further, the present invention provides a high voltage apparatus including an apparatus (not shown in the drawings) disposed in the enclosed space 2 and a filling block 1 in which a plurality of casings are made of an electrically insulating material and an inner cavity thereof is filled with an electrically insulating gas, disposed in the enclosed space 2.

The method and the device for filling and recovering the electric insulating gas in the closed space are suitable for designing the gas insulating cavity of the high-voltage device.