Multi-layer composite sealing protection structure

Abstract

A multi-layer composite sealing protection structure comprises a sealing box and a sealing cover, the interior of the sealing box is a space for storing equipment, one side of the sealing box is provided with a placing opening for placing the equipment, the outer side of the placing opening is provided with a sealing groove, a sealing strip is installed in the sealing groove, and the depth of the sealing groove is smaller than the wall thickness of the sealing box. The depth of the sealing strip is larger than that of the sealing groove, the sealing cover is fixedly connected with the sealing box after being in interference fit with the sealing strip, seawater-proof sealant is filled between the sealing cover and the sealing strip and between the sealing cover and the sealing box, and the outer surfaces of the sealing box and the sealing cover are coated with multiple layers of protective paint. The multi-layer sealing protection structure is good in manufacturability, low in machining cost, simple in structure, good in gap corrosion prevention effect and suitable for static sealing protection of navigation equipment with the complex appearance.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing protection, and particularly relates to a multi-layer composite sealing protection structure. Background Art

[0002] In order to adapt to the harsh marine use environment, the navigation equipment installed on the ship deck needs to effectively prevent the corrosion of seawater, salt spray, etc. on the internal electronic devices of the equipment, and ensure that the product works normally within the service life cycle.

[0003] For the common static sealing structure, especially for navigation equipment with complex and irregular shapes, considering the processing cost, it is generally produced by machining process with ordinary machining equipment, with relatively low cost. The machining accuracy of the sealing matrix parts is relatively low, the flatness, roughness, shape and position of the mating surfaces of the sealing matrix parts are relatively poor, and there are tiny gaps between the mating surfaces. In the marine environment, corrosion media such as sea waves or salt spray enter the gaps of the sealing matrix parts, gradually forming crevice corrosion, resulting in the gradual corrosion and damage of the sealing layer, causing the internal electronic devices to rust, with a short service life cycle and a high replacement and maintenance frequency. Therefore, navigation equipment with complex shapes requires a sealing structure with low processing cost, good sealing effect, long service life, reliability and effectiveness. Summary of the Invention

[0004] The purpose of the utility model is to provide a multi-layer composite sealing protection structure in view of the corresponding deficiencies of the prior art. This multi-layer sealing protection structure has good processability, relatively low processing cost, simple structure, good effect of preventing crevice corrosion, and is applicable to the static sealing protection of navigation equipment with complex shapes.

[0005] The purpose of the utility model is realized by the following scheme: A multi-layer composite sealing protection structure includes a sealing box and a sealing cover. The inside of the sealing box is a space for storing equipment. One side of the sealing box is provided with a placement opening for putting the equipment in. A sealing groove is arranged outside the placement opening, and a sealing strip is installed in the sealing groove. The depth of the sealing groove is less than the wall thickness of the sealing box, and the depth of the sealing strip is greater than the depth of the sealing groove. After the sealing cover is in interference fit with the sealing strip, it is connected and fixed to the sealing box. A seawater-proof sealing glue is filled between the sealing cover and the sealing strip and between the sealing cover and the sealing box. Multi-layer protective paint is applied to the outer surfaces of the sealing box and the sealing cover.

[0006] Two sealing grooves are radially arranged outside the placement opening of the sealing box, and a plurality of threaded holes are evenly arranged between the two sealing grooves. The depth of the threaded holes is less than the wall thickness of the sealing box. A stepped through hole coaxial with the threaded holes is arranged at the upper end of the sealing cover, and a locking bolt is installed in the stepped through hole to connect and fix the sealing box and the sealing cover. A sealing rubber cover for sealing the locking bolt is arranged above the locking bolt.

[0007] Seawater-proof sealant is filled between the locking bolt, the sealed box and the sealed cover, and seawater-proof sealant is filled between the locking bolt and the sealed rubber cover.

[0008] The sealed rubber cover is made of EPDM.

[0009] The sealing groove is a rectangular ring groove.

[0010] The sealing strip is a trapezoidal circular sealing strip, and the sealing strip is made of EPDM.

[0011] Three layers of protective paint are applied to the outer surfaces of the sealed box and the sealed cover.

[0012] The advantages of the present utility model are as follows: 1. This sealing and protection structure is applicable to navigation equipment with complex and irregular shapes, and is also applicable to navigation equipment with simple and regular shapes.

[0013] 2. This sealing and protection structure has good processability, low processing cost and simple structure.

[0014] 3. The components of this sealing and protection structure are tightly connected. Seawater-proof sealant is filled between the gaps of the components. Multiple layers of protective paint are applied to the outer surface of the structure. It has good effect of preventing crevice corrosion, long service life, good use effect and low manufacturing cost. Description of the Drawings

[0015] Figure 1 are schematic diagrams of each structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure after assembly of the present utility model;

[0017] Figure 3 is a right view of the sealed box. Detailed Embodiment

[0018] As Figures 1 to 3As shown in the figure, a multi-layer composite sealing and protection structure includes a sealing box 4 and a sealing cover 1. The interior of the sealing box 4 is a space for storing the device 3. On one side of the sealing box 4, there is a placement opening 2 for putting the device 3 in. Two sealing grooves 6 are radially arranged outside the placement opening 2, and the sealing grooves 6 are rectangular annular grooves. Sealing strips 10 are installed in the sealing grooves 6. The depth of the sealing grooves 6 is less than the wall thickness of the sealing box. The depth of the sealing strips 10 is greater than the depth of the sealing grooves 6. The sealing cover 1 is connected and fixed to the sealing box 4 after being in interference fit with the sealing strips 10. Between the two sealing grooves 6 at the upper end of the placement opening 2 of the sealing box 4, a plurality of threaded holes 5 are provided. The depth of the threaded holes 5 is less than the wall thickness of the sealing box 4. At the upper end of the sealing cover 1, a stepped through hole 7 coaxial with the threaded holes 5 is provided. A locking bolt 8 is installed in the stepped through hole 7 to connect and fix the sealing box 4 and the sealing cover 1. Above the locking bolt 8, a sealing rubber cover 9 is provided for sealing the locking bolt 8. Anti-seawater sealant is filled between the locking bolt 8 and the sealing box 4 and the sealing cover 1. Anti-seawater sealant is filled between the locking bolt 8 and the sealing rubber cover 9. Anti-seawater sealant is filled between the sealing cover 1 and the sealing strips 10 and between the sealing cover 1 and the sealing box 4. Three layers of protective paint 11 are applied to the outer surfaces of the sealing box 4 and the sealing cover 1. The sealing rubber cover 9 is made of EPDM. The sealing strips 10 are trapezoidal circular sealing strips, and the sealing strips 10 are made of EPDM.

[0019] When sealing and protecting the device, first place the device into the sealing box through the placement opening of the sealing box and fix it. Then put the sealing strips into the sealing grooves, align the sealing cover with the sealing box, compress the sealing strips into the sealing grooves and completely fill the sealing grooves. The compression amount of the sealing strips is 25%. The sealing cover fits tightly with the sealing box. The through holes on the sealing cover are aligned with the threaded holes on the sealing box. After coating the thread profile of the locking bolt with anti-seawater sealant, assemble it into the threaded hole and lock it. The sealing box and the sealing cover are connected and fixed by the locking bolt. After the sealing box and the sealing cover are fixed, inject anti-seawater sealant into the through hole of the locking bolt and install the sealing rubber cover into the through hole. Then fill the gaps between the components with anti-seawater sealant. Finally, apply three layers of protective paint on the surfaces of the sealing box and the sealing cover.

[0020] In a marine environment, if rainwater, seawater and salt spray enter the device, the internal routes are as follows:

[0021] 1. The route of entering from the gap at the top of the device is: through the paint layer - anti-seawater sealant at the gap - (the first layer) sealing strip - (the second layer) sealing strip - inside the device;

[0022] 2. The route of entering from the side gap of the device is: through the paint layer - rubber cover - anti-seawater sealant - anti-seawater sealant at the bolt gap - sealing strip - inside the device.

[0023] In the marine environment, rainwater, seawater and salt spray must pass through at least four layers of sealing media to enter the interior of the equipment, and the sealing media on the sealing and protection equipment can effectively protect the internal equipment from being corroded by external media.

[0024] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art can make modifications to the present invention without departing from the spirit of the present invention, and such modifications fall within the protection scope of the present invention.

Claims

1. A multi-layer composite sealing and protection structure, characterized in that: It includes a sealed box (4) and a sealing cover (1). Inside the sealed box (4) is a space for storing the device (3). On one side of the sealed box (4), there is a placement opening (2) for putting the device (3) in. Outside the placement opening (2), there is a sealing groove (6), and a sealing strip (10) is installed in the sealing groove (6). The depth of the sealing groove (6) is less than the wall thickness of the sealed box. The depth of the sealing strip (10) is greater than the depth of the sealing groove (6). After the sealing cover (1) is in interference fit with the sealing strip (10), it is connected and fixed to the sealed box (4). Anti-seawater sealant is filled between the sealing cover (1) and the sealing strip (10) and between the sealing cover (1) and the sealed box (4). Multiple layers of protective paint (11) are applied to the outer surfaces of the sealed box (4) and the sealing cover (1).

2. The multi-layer composite sealing and protection structure according to claim 1, wherein: On the outside of the placement opening (2) of the sealed box (4), two sealing grooves (6) are radially arranged. A plurality of threaded holes (5) are evenly arranged between the two sealing grooves (6). The depth of the threaded holes (5) is less than the wall thickness of the sealed box (4). At the upper end of the sealing cover (1), there is a stepped through hole (7) coaxial with the threaded holes (5). A locking bolt (8) is installed in the stepped through hole (7) to connect and fix the sealed box (4) and the sealing cover (1). Above the locking bolt (8), there is a sealing rubber cover (9) for sealing the locking bolt (8).

3. The multi-layer composite sealing and protection structure according to claim 2, wherein: Anti-seawater sealant is filled between the locking bolt (8) and the sealed box (4) and the sealing cover (1). Anti-seawater sealant is filled between the locking bolt (8) and the sealing rubber cover (9).

4. The multi-layer composite sealing and protection structure according to claim 2, characterized in that: The sealing rubber cover (9) is made of EPDM.

5. The multi-layer composite sealing and protection structure according to claim 1, characterized in that: The sealing groove (6) is a rectangular ring groove.

6. The multi-layer composite sealing and protection structure according to claim 1, characterized in that: The sealing strip (10) is an oval sealing strip, and the sealing strip (10) is made of EPDM.

7. The multi-layer composite sealing and protection structure according to claim 1, characterized in that: Three layers of protective paint (11) are applied to the outer surfaces of the sealed box (4) and the sealing cover (1).

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