CN111682425A - Moisture-proof structure and moisture-proof method for electrical equipment - Google Patents

Abstract

The invention relates to the field of electrical equipment, and discloses a moisture-proof structure and a moisture-proof method of the electrical equipment. Waterproof sand is filled in the cable trench, and a drain pipe for communicating the interior of the cable trench with the exterior of the cable trench is arranged on the side wall of the cable trench in a penetrating manner; one end of the cable pipeline penetrates through the bottom of the mechanism box, the other end of the cable pipeline penetrates through the cover plate and extends into the cable trench, foam caulking agent is filled in the cable pipeline, and an inorganic plugging material layer is coated on the inner wall of the bottom of the mechanism box so as to seal a gap on the bottom of the mechanism box. According to the concrete tank structure, the cable trench is drained through the drain pipe, and the waterproof sand prevents external water vapor from playing a primary waterproof role; the foam joint mixture in the cable pipeline further prevents water vapor from entering the mechanism box, and the inorganic material blocking layer on the inner wall of the bottom of the mechanism box can further prevent the water vapor from entering the mechanism box, so that the moisture resistance is improved.

Description

Moisture-proof structure and moisture-proof method for electrical equipment

technical field

The invention relates to the technical field of electrical equipment, in particular to a moisture-proof structure and a moisture-proof method for electrical equipment.

Background technique

Electrical equipment usually includes a mechanism box and electrical components arranged in the mechanism box. In order to improve the moisture-proof effect of electrical equipment, it is usually necessary to carry out moisture-proof design for the mechanism box of the electrical equipment and the foundation on which the mechanism box is placed, especially for outdoor GIS and HGIS equipment.

However, for a long time, the moisture-proof structure of electrical equipment is simple in design, and the moisture-proof effect is poor. Due to the influence of outdoor humid weather, after the GIS and HGIS equipment is put into operation, the waterproof and moisture-proof performance of some parts and components cannot meet the objective climatic conditions such as outdoor humidity and rainfall. The internal secondary terminals are corroded and bonded, the instruments and meters are damp and water, and the valve switches and pipeline flange connections are corroded and aged. If not solved, the AC and DC system may be grounded in severe cases, affecting the operation of switches and knife switches, and posing a great threat to the safe and stable operation of the substation.

Therefore, there is an urgent need to provide a moisture-proof structure and a moisture-proof method for electrical equipment to improve the moisture-proof performance.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a moisture-proof structure for electrical equipment, so as to improve the moisture-proof performance.

For this purpose, the present invention adopts the following technical solutions:

A moisture-proof structure for electrical equipment, comprising:

The cable trench is a concrete trench structure. The cable trench is used to accommodate cables, and the cable trench is filled with waterproof sand. a drain pipe communicating with the outside of the cable trench;

a cover plate, covering the opening of the cable trench;

a mechanism box, the mechanism box is located above the cable trench;

a cable duct, one end of which penetrates through the bottom of the mechanism box, and the other end penetrates through the cover plate and extends into the inside of the cable duct, so that the cables in the cable duct can be introduced into the cable duct through the cable duct in the organization box;

Wherein, the cable duct is filled with foam caulking agent, and the inner wall of the bottom of the mechanism box is coated with an inorganic blocking material layer to seal the gap on the bottom of the mechanism box.

Optionally, an exhaust hole is opened on the side wall of the mechanism box.

Optionally, the outer side wall of the mechanism box is provided with a side rain cover covering the exhaust hole.

Optionally, the inner side wall of the mechanism box is provided with a slot box with an opening covering the exhaust hole, and the slot box is filled with artificial grass.

Optionally, the mechanism box includes:

a box body, the box body is provided with a box body opening;

a box door, arranged on the box body, and used to cover the opening of the box body;

Wherein, a sealing rubber strip is arranged around the box door facing the side wall of the box body, so that the box door can be sealed and covered on the opening of the box body. The material of the sealing rubber strip is It is EPDM rubber material.

Optionally, the upper part of the inorganic material blocking layer is coated with a PRTV anti-pollution flashover paint layer.

Optionally, the PRTV anti-pollution flashover coating layer is encapsulated and covered with an aluminum foil paper layer.

Another object of the present invention is to provide a moisture-proof method for electrical equipment, so as to improve the moisture-proof performance.

For this purpose, the present invention adopts the following technical solutions:

A moisture-proof method for electrical equipment, comprising the following steps:

Construction of cable trenches: To build a cable trench with a concrete trench structure, a drainage pipe connecting the inside of the cable trench with the outside of the cable trench is pierced on the side wall of the cable trench, and waterproof sand is filled in the trench body of the cable trench. Cover the opening of the cable trench with a cover plate;

Seal the cable duct: fill the foam caulking agent in the cable duct connecting the inside of the cable trench and the inside of the mechanism box to seal the gap between the cables in the cable duct;

Sealing and processing mechanism box: An inorganic blocking material layer is coated on the bottom inner wall of the mechanism box to seal the gap on the bottom of the mechanism box.

Optionally, the manufacturing method of the moisture-proof structure of the electrical equipment further comprises the following steps:

Ventilation design of the mechanism box: open the exhaust hole on the side wall of the mechanism box, install the side rain cover on the outer side wall of the mechanism box, and cover the side rain cover on the exhaust hole; on the inner side wall of the mechanism box Install a slot box with an opening, the slot box is covered on the exhaust hole, and the slot box is filled with artificial grass.

Optionally, the step of sealing the processing mechanism box further includes the following steps:

Apply a PRTV anti-pollution flashover paint layer on the upper part of the inorganic blocking material layer coated on the bottom inner wall of the mechanism box;

The aluminum foil paper layer is encapsulated and covered on the PRTV anti-pollution flashover coating layer.

The beneficial effects of the present invention are:

The moisture-proof structure of the electrical equipment of the present invention has a cable trench with a concrete tank structure, the cable is drained through a drain pipe, and the water-proof sand prevents external water vapor, thereby playing a preliminary waterproof and moisture-proof function; The interior is filled with foam caulking agent, which further prevents the water vapor in the cable trench from entering the mechanism box through the cable duct, thereby playing the role of the second layer of waterproof and moisture-proof; at the same time, the bottom inner wall of the mechanism box is coated. The inorganic blocking material layer can further prevent the water vapor in the cable pipeline from entering the mechanism box. The moisture-proof structure of the electrical equipment of the present invention effectively blocks the water vapor in the cable trench from entering the mechanism box, thereby improving the moisture-proof performance.

Description of drawings

Fig. 1 is the sectional schematic diagram of the moisture-proof structure of the electrical equipment provided by the present invention;

Fig. 2 is the partial enlarged view of A place in Fig. 1;

Fig. 3 is a partial enlarged view at B in Fig. 1;

Figure 4 is a schematic structural diagram of the mechanism box.

In the picture:

1-cable trench; 2-waterproof sand; 3-drain pipe; 4-cover plate; 5-mechanism box; 51-box body; 52-box door; 53-exhaust hole; 54-side rain cover; 55- Slot box; 56-simulation grass; 6-cable pipe; 7-foam caulking agent; 8-inorganic plugging layer; 9-PRTV anti-pollution flashover coating layer; 10-aluminum foil paper layer.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "left", "right" and other azimuth or positional relationships are based on the azimuth or positional relationship shown in the accompanying drawings, which are only for the convenience of description and simplifying operations. It is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

Example 1

The mechanism box of the existing electrical equipment is directly connected with the cable trench through a cable conduit with a simple structure, and no effective waterproof and moisture-proof design has been carried out. There is a lot of water vapor inside the box. As shown in Figures 1-3, this embodiment proposes a moisture-proof structure for electrical equipment, which can effectively prevent the water vapor in the cable trench 1 from entering the mechanism box 5, improve the moisture resistance of the mechanism box 5, and avoid the water vapor Influence on the electrical components in the mechanism box 5 . The moisture-proof structure of electrical equipment includes cable trench 1, waterproof sand 2, drainage pipe 3, cover plate 4, mechanism box 5 and cable duct 6. The cable trench 1 is a concrete trench structure. The cable trench 1 is used to accommodate the cables that need to be introduced into the mechanism box 5. The cable trench 1 is filled with waterproof sand 2. The side wall of the cable trench 1 is provided with a cable trench 1. The inside of the drain pipe 3 communicates with the outside of the cable trench 1; the cover plate 4 is covered on the opening of the cable trench 1; the mechanism box 5 is located above the cable trench 1; one end of the cable conduit 6 runs through the bottom of the mechanism box 5, and the cable conduit The other end of 6 penetrates the cover plate 4 and extends into the inside of the cable trench 1, so that the cable in the cable trench 1 can be introduced into the mechanism box 5 through the cable duct 6; wherein, the cable duct 6 is filled with foam caulking agent 7. An inorganic blocking material layer 8 is coated on the bottom inner wall of the mechanism box 5 to seal the gap on the bottom of the mechanism box 5 . The material of the inorganic blocking material layer 8 is inorganic blocking material, which is a gray powdery material, which can be used for plugging holes of wires and cables or as a fire barrier for wire tunnels after being mixed with water. Compared with the existing fireproof mud material layer which is easy to age and crack, the inorganic blocking material layer 8 has the characteristics of not easy to age, good blocking effect, good adhesion, long life, convenient expansion, etc. The gap between the cables at the bottom has a good moisture-proof effect.

The moisture-proof structure of the electrical equipment in this embodiment has a cable trench 1 with a concrete tank structure. The cable trench 1 is drained through a drain pipe 3, and the waterproof sand in the cable trench 1 prevents external water vapor from entering the cable trench 1, thereby greatly reducing the number of cables. The water vapor in the trench 1 plays a preliminary waterproof and moisture-proof role; the interior of the cable duct 6 connecting the cable trench 1 and the mechanism box 5 is filled with a foam caulking agent 7, which can further prevent the cable trench 1. The water vapor with it enters the mechanism box 5 through the cable duct 6, thereby further waterproofing and moisture-proof; at the same time, the inorganic blocking material layer 8 coated on the bottom inner wall of the mechanism box 5 can further block the water vapor in the cable duct 6. Enter mechanism box 5. The moisture-proof structure of the electrical equipment in this embodiment effectively blocks the water vapor in the cable trench 2 from entering the mechanism box 5 through the cable duct 6 , thereby improving the moisture-proof performance, and can well solve the two problems inside the mechanism box 5 . Corrosion and adhesion of secondary terminals, moisture and water inflow of instruments and meters, and corrosion and aging of valve switches and pipeline flange connections.

In addition, the mechanism box 5 needs to have good exhaust performance to avoid that the water vapor in the mechanism box 5 cannot be discharged. Further, as shown in FIG. 3 , an exhaust hole 53 is opened on the side wall of the mechanism box 5 . The exhaust hole 53 can be a long grid hole or a round hole. By opening the exhaust hole 53, the air permeability of the mechanism box 5 can be ensured, and then when there is a lot of water vapor in the mechanism box 5, it can make the mechanism box 5. The exhaust hole 53 is discharged.

Further, in order to prevent external rainwater from flowing into the mechanism box 5 through the exhaust hole 53 . As shown in FIG. 3 , the outer side wall of the mechanism box 5 is provided with a side rain cover 54 covering the exhaust hole 53, and a plurality of ventilation grill holes (not marked in the figure) are opened on the side rain cover 54. Furthermore, when the ventilation of the mechanism box 5 is ensured, it is possible to prevent rainwater from entering the mechanism box 5 .

In addition, in order to prevent small animals such as mosquitoes from entering the mechanism box 5 through the exhaust hole 53 . Further, as shown in FIG. 3 , the inner side wall of the mechanism box 5 is provided with a slot box 55 with an opening covering the exhaust hole 53, the slot box 55 is filled with artificial grass 56, and the artificial grass 56 is fluffy. The block structure, on the one hand, has good air permeability, on the other hand, it also plays the role of blocking the exhaust hole 53, which not only ensures the ventilation performance of the mechanism box 5, but also prevents small animals such as mosquitoes from entering the mechanism box 5. Inside.

Further, as shown in FIG. 4 , the mechanism box 5 includes a box body 51 and a box door 52 . The box body 51 is provided with a box body opening; the box body 52 is arranged on the box body 51, and the box door 52 is used to cover the box body opening. Wherein, a sealing rubber strip 57 is provided around the box door 52 facing the side wall of the box body 51, so that the box door 52 can be sealed on the opening of the box body, and the material of the sealing rubber strip 57 is EPDM Rubber material, EPDM rubber material has good elasticity and resistance to compression deformation, oxidation resistance and erosion resistance, and can work in the environment of -40℃-120℃.

Further, in order to improve the insulation between different cables at the bottom of the mechanism box 5 . As shown in FIG. 1 , in this embodiment, the upper part of the inorganic material blocking layer 8 is coated with a PRTV anti-pollution flashover paint layer 9 . The material of the PRTV anti-pollution flashover paint layer 9 is PRTV anti-pollution flashover paint. PRTV anti-pollution flashover coatings are mainly used for external insulation of power system substations and transmission line insulators, power plants and power user substation equipment and other electrical equipment for durable anti-pollution flashover. After using this product on insulators, PRTV composite ceramic or glass insulators are formed, which is a reliable solution to improve the external insulation configuration of power transmission and transformation equipment. DC systems, substations and overhead transmission line equipment operating under dirty conditions are externally insulated to prevent pollution, prevent flashover, and improve the external insulation level of equipment.

In addition, as shown in FIG. 1 , in this embodiment, the PRTV anti-pollution flashover paint layer 9 is encapsulated and covered with an aluminum foil paper layer 10 , and the aluminum foil paper layer 10 mainly plays the role of ensuring the moisture-proof effect.

To sum up, the moisture-proof structure of the electrical equipment in this embodiment effectively solves the problem that a large amount of water vapor in the cable trench 1 enters the mechanism box 5 through the cable conduit 6, greatly improves the moisture-proof performance of the mechanism box 5, and avoids water vapor. Influence on the electrical components in the mechanism box 5 .

Embodiment 2

This embodiment proposes a moisture-proof method for electrical equipment. The moisture-proof structure for electrical equipment as shown in Figures 1-4 proposed in the first embodiment can be manufactured through the moisture-proof method for electrical equipment in this embodiment. The moisture-proof method for electrical equipment It mainly includes the following steps:

Construction of cable trench 1: A cable trench 1 with a concrete trench structure is constructed, and a drainage pipe 3 that connects the inside of the cable trench 1 with the outside of the cable trench 1 is drilled on the side wall of the cable trench 1. The tank body is filled with waterproof sand 2, and the opening of the cable trench 1 is covered by the cover plate 4.

Sealing the cable duct 6: Fill the foam caulking agent 7 in the cable duct 6 connecting the inside of the cable trench 1 and the inside of the mechanism box 5 to block the gaps between the cables in the cable duct 6;

Sealing and processing mechanism box 5 : an inorganic blocking material layer 8 is coated on the bottom inner wall of mechanism box 5 to seal the gap on the bottom of mechanism box 5 .

The moisture-proof structure of electrical equipment produced by the above steps has the following advantages: after the cable trench 1 of the concrete tank structure is covered with a cover plate 4, the cable trench 1 is in a relatively sealed state, especially in the case of rainy summer, it can be Effectively prevent water from entering the cable trench 1. At the same time, the cable trench 1 is drained through the drain pipe 3, and the waterproof sand in the cable trench 1 prevents the external water vapor from entering the inside of the cable trench 1, thereby greatly reducing the water vapor in the cable trench 1, which plays a preliminary waterproof and moisture-proof effect; The inside of the cable duct 6 connecting the trench 1 and the mechanism box 5 is filled with foam caulking agent 7. The foam caulking agent 7 can further prevent the water vapor in the cable trench 1 from entering the mechanism box 5 through the cable duct 6, thereby playing a Further waterproof and moisture-proof effect; at the same time, the inorganic blocking layer 8 coated on the bottom inner wall of the mechanism box 5 can further prevent the water vapor in the cable duct 6 from entering the mechanism box 5. The moisture-proof structure of the electrical equipment in this embodiment effectively blocks the moisture contained in the cable trench 2 from entering the mechanism box 5 through the cable duct 6, thereby improving the moisture-proof performance.

Further, in order to improve the ventilation of the mechanism box 5, the water vapor in the mechanism box 5 is discharged as soon as possible. In this embodiment, the manufacturing method of the moisture-proof structure of the electrical equipment further comprises the following steps:

The ventilation design of the mechanism box 5: open the exhaust hole 53 on the side wall of the mechanism box 5, install the side rain cover 54 on the outer side wall of the mechanism box 5, and the side rain cover 54 covers the exhaust hole 53; A slot box 55 with an opening is installed on the inner side wall of the mechanism box 5 , the slot box 55 covers the exhaust hole 53 , and the slot box 55 is filled with artificial grass 56 . Specifically, the tank box 55 and the side rain cover 54 may be welded on the side walls of the mechanism box 5 respectively.

Among them, the side rain cover 54 can prevent rainwater from entering the mechanism box 5 under the condition of ensuring the ventilation of the mechanism box 5; at the same time, by arranging the slot box 55 filled with artificial grass 56, the ventilation of the mechanism box 5 is guaranteed. On the premise of performance, small animals such as mosquitoes are also prevented from entering the mechanism box 5 .

Further, in order to be able to improve the insulation between different cables at the bottom of the mechanism box 5 and further improve the sealing performance of the bottom of the mechanism box 5 . In this embodiment, the step of sealing the processing mechanism box 5 also includes the following steps:

A PRTV anti-pollution flashover paint layer 9 is applied on the upper part of the inorganic blocking material layer 8 coated on the bottom inner wall of the mechanism box 5;

An aluminum foil paper layer 10 is encapsulated and covered on the PRTV anti-pollution flashover paint layer 9 .

Among them, the method of coating the PRTV anti-pollution flashover paint layer 9 is used to deal with the insulation between different cables at the bottom of the mechanism box 5 , and the operation is flexible and different positions inside the mechanism box 5 can be flexibly coated. The processing method of encapsulating and covering the aluminum foil paper layer 10 also has the characteristics of simple operation, which can effectively ensure the moisture-proof effect.

The outer sheath of the aviation plug connected to the mechanism box 5 in the prior art lacks waterproof and moisture-proof protection. Further, in order to improve the waterproof and moisture-proof performance of the outer sheath of the aviation plug connected with the mechanism box 5 . In this embodiment, the step of sealing the processing mechanism box 5 also includes the following steps:

First of all, spray anti-rust agent on the surface of the outer sheath of the aviation plug and the sleeve, the specific anti-rust agent is WD-40 anti-rust agent, and then play the role of anti-rust.

Then, apply structural adhesive on the outer sheath of the aviation plug that has been sprayed with rust inhibitor, and the specific structural adhesive is 3M brand structural adhesive, so as to provide a second layer of protection for the outer sheath of the aviation plug.

Then, apply PRTV anti-pollution flashover paint on the outer sheath of the aviation plug that has been coated with structural adhesive, thereby providing a third layer of protection for the outer sheath of the aviation plug.

Finally, wrap the heat shrinkable tape on the outer sheath of the aviation plug that has been painted with PRTV anti-pollution flashover paint, and use a hot air blower to heat shrink the heat shrinkable tape, so as to play the role of sealing and moisture-proof, which is the outer sheath of the aviation plug. The sheath provides a fourth layer of protection.

Further, a knife switch/ground knife device is installed in the mechanism box 5, and the rotating part of the transmission rod of the knife switch/ground knife is easily oxidized and rusted when exposed to humid air for a long time. The moisture-proof method for electrical equipment of the present embodiment further comprises the following steps:

Apply molybdenum disulfide to the rotating part of the transmission rod of the knife switch/ground knife.

Among them, the application of molybdenum disulfide can not only play a lubricating role, but also form an anti-oxidation layer on the surface of the rotating part of the transmission rod of the knife switch/ground knife, which can also prevent the transmission of the knife switch/ground knife caused by oxidation and rust. The problem of sticking in the rotating part of the rod.

The above contents are only preferred embodiments of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. limits.

Claims (10)

1. A moisture-proof structure of an electric device, comprising:

the cable trench (1) is of a concrete trench structure, the cable trench (1) is used for accommodating cables, waterproof sand (2) is filled in the cable trench (1), and a drain pipe (3) for communicating the interior of the cable trench (1) with the exterior of the cable trench (1) is arranged on the side wall of the cable trench (1) in a penetrating manner;

the cover plate (4) covers the opening of the cable trench (1);

the mechanism box (5) is positioned above the cable trench (1);

a cable duct (6), one end of which penetrates through the bottom of the mechanism box (5), and the other end of which penetrates through the cover plate (4) and extends into the cable trench (1), so that a cable in the cable trench (1) can be led into the mechanism box (5) through the cable duct (6);

and a foam joint mixture (7) is filled in the cable pipeline (6), and an inorganic plugging layer (8) is coated on the inner wall of the bottom of the mechanism box (5) so as to seal a gap on the bottom of the mechanism box (5).

2. Moisture-proof structure for electric equipment as claimed in claim 1, characterized in that the side wall of the mechanism case (5) is provided with a vent hole (53).

3. Moisture-proof construction for electrical equipment according to claim 2, characterized in that a side rain cover (54) covering the air vent (53) is provided on the outer side wall of the mechanism box (5).

4. The moisture-proof structure of an electric appliance according to claim 2, wherein a groove box (55) opened to cover the air discharge hole (53) is provided on an inner side wall of the mechanism case (5), and the groove box (55) is filled with artificial grass (56).

5. Moisture-proof construction for an electrical apparatus as claimed in claim 1, characterized in that the mechanism box (5) comprises:

the box body (51), wherein a box body opening is formed in the box body (51);

the box door (52) is arranged on the box body (51) and is used for covering the opening of the box body;

sealing rubber strips (57) are annularly arranged on the periphery of the side wall, opposite to the box body (51), of the box door (52) so that the box door (52) can be arranged on the opening of the box body in a sealing mode, and the sealing rubber strips (57) are made of ethylene propylene diene monomer rubber materials.

6. Moisture barrier construction for electrical equipment according to claim 1, characterised in that the upper part of the inorganic block-up layer (8) is coated with a PRTV anti-pollution flashover coating layer (9).

7. Moisture-proof construction for an electrical apparatus according to claim 6, characterized in that the PRTV anti-contamination flashover paint layer (9) is encapsulated with a layer of aluminium foil paper (10).

8. A method of moisture protection for electrical equipment, comprising the steps of:

building a cable trench (1): the concrete trough structure comprises a cable trough (1) for building a concrete trough structure, a drain pipe (3) for communicating the inside of the cable trough (1) with the outside of the cable trough (1) is arranged on the side wall of the cable trough (1) in a penetrating mode, a trough body of the cable trough (1) is filled with waterproof sand (2), and an opening of the cable trough (1) is sealed and covered through a cover plate (4);

sealing treatment of cable duct (6): filling foam caulking agent (7) in a cable pipeline (6) communicating the inside of the cable trench (1) and the inside of the mechanism box (5) to seal gaps among cables in the cable pipeline (6);

sealing treatment mechanism case (5): an inorganic plugging layer (8) is coated on the inner wall of the bottom of the mechanism box (5) to seal a gap on the bottom of the mechanism box (5).

9. A method of moisture protection of an electrical device as claimed in claim 8, characterized in that the method of manufacturing a moisture protection structure of an electrical device further comprises the steps of:

the ventilation design of the mechanism box (5): an exhaust hole (53) is formed in the side wall of the mechanism box (5), a side rain cover (54) is installed on the outer side wall of the mechanism box (5), and the side rain cover (54) covers the exhaust hole (53); an open groove box (55) is arranged on the inner side wall of the mechanism box (5), the groove box (55) covers the exhaust hole (53), and the groove box (55) is filled with simulated grass (56).

10. Moisture protection method for electrical equipment according to claim 8, characterized in that said step of sealing the processing means box (5) further comprises the steps of:

a PRTV anti-pollution flashover coating layer (9) is coated on the upper part of an inorganic plugging layer (8) coated on the inner wall of the bottom of the mechanism box (5);

an aluminum foil paper layer (10) is packaged and covered on the PRTV anti-pollution flashover coating layer (9).

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