CN115419710A - Shell and sealing method - Google Patents

Abstract

The disclosure provides a housing and a sealing method, which belong to the technical field of mechanical assembly. The housing includes a skeleton, a cladding layer and a sealant; the outer wall of the skeleton has an accommodation groove, and the bottom of the accommodation groove has a filling groove; the cladding layer is located in the accommodating groove, and the outer edge of the cladding layer is in contact with the accommodation The side walls of the groove are against each other, and the joint between the outer edge of the cladding layer and the side wall of the accommodating groove corresponds to the filling groove; the sealant is located in the filling groove, and is respectively bonded to the skeleton and the cladding layer to seal the package The joint between the outer edge of the cladding and the side wall of the accommodating tank. The present disclosure can ensure the airtightness and durability of the case.

Description

Shell and sealing method

technical field

The disclosure belongs to the technical field of mechanical assembly, and in particular relates to a casing and a sealing method.

Background technique

In ship equipment, in order to realize the lightweight design of the equipment on the basis of ensuring the structural strength of the equipment, the shell of the equipment will be designed as a multi-layer structure.

In the related art, the housing includes a skeleton and a cladding layer, the skeleton is a structural member with high structural strength but relatively heavy weight, and the cladding layer is a structural member with light weight but relatively weak structural strength. Wrapping the cladding layer outside the skeleton can not only support the cladding layer through the skeleton, thereby ensuring the structural strength of the shell, but also reduce the overall weight of the shell through the cladding layer, which can not only reduce the weight of the shell The design is also conducive to the streamlined design of the housing.

Since the operating environment of marine equipment is in water, it is necessary to fully consider the sealing of the shell. However, the butt gap between the skeleton and the cladding layer cannot meet the sealing requirements.

Contents of the invention

Embodiments of the present disclosure provide a casing and a sealing method, which can ensure the sealing and durability of the casing. Described technical scheme is as follows:

An embodiment of the present disclosure provides a casing, including a skeleton, a cladding layer, and a sealant;

The outer side wall of the skeleton has an accommodating groove, and the bottom of the accommodating groove has a filling groove;

The cladding layer is located in the accommodating groove, the outer edge of the cladding layer is against the side wall of the accommodating groove, and the outer edge of the cladding layer is in contact with the side wall of the accommodating groove The butt joint between corresponds to the filling groove;

The sealant is located in the filling groove, and is respectively bonded to the framework and the cladding layer to seal the joint between the outer edge of the cladding layer and the side wall of the accommodating tank .

In an implementation manner of the present disclosure, the outer edge of the cladding layer has a first slope;

The first slope faces the filling groove, and an expansion groove is formed between the first slope and the side wall and bottom of the accommodating groove, and the expansion groove communicates with the filling groove.

In another implementation manner of the present disclosure, the side wall of the accommodating groove has a second slope;

In a direction away from the groove bottom of the accommodating groove, the second slope is inclined toward the cladding layer;

The outer edge of the cladding layer has a third slope, and the third slope is opposed to the second slope.

In yet another implementation manner of the present disclosure, the second slope extends away from the accommodating groove from the notch of the filling groove.

In yet another implementation manner of the present disclosure, the third slope intersects the first slope.

In yet another implementation manner of the present disclosure, the groove wall profile of the filling groove is hemispherical.

In yet another implementation manner of the present disclosure, the outer sidewall of the framework is flush with the outer sidewall of the cladding layer.

In yet another implementation manner of the present disclosure, the skeleton is a metal structural member, and the cladding layer is a fiberglass structural member.

An embodiment of the present disclosure provides a sealing method, the sealing method comprising:

Process the accommodation groove on the outer wall of the skeleton;

Machining a filling groove at the bottom of the accommodating groove;

Filling the sealant into the filling groove;

wrapping the cladding layer on the skeleton and being located in the accommodating groove, the outer edge of the cladding layer abuts against the side wall of the accommodating groove, so that the sealant seals the cladding The joint between the outer edge of the layer and the side wall of the accommodating groove.

In an implementation manner of the present disclosure, filling the sealant into the filling groove includes:

The sealant is filled in the filling groove, and the sealant overflows the filling groove.

The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure at least include:

Since the outer wall of the frame has a receiving groove, a suitable receiving space can be provided for the covering layer through the receiving groove, which ensures that the covering layer can be firmly wrapped on the frame. Moreover, a filling groove is provided at the bottom of the accommodating groove, and the filling groove is used for filling the sealant. In this way, after the cladding layer is wrapped on the skeleton, the outer edge of the cladding layer and the edge of the accommodating groove The side walls are against each other, and the sealant can be bonded to the skeleton and the cladding layer respectively, thereby sealing the joint between the outer edge of the cladding layer and the side wall of the accommodating tank, thereby ensuring that the skeleton and sealing between the cladding. In addition, since the sealant is bonded to the skeleton and the cladding layer respectively, the vibration occurring between the skeleton and the cladding layer can also be absorbed by the sealant, so as to avoid the vibration between the skeleton and the cladding layer. Durability is guaranteed by the seal failing under prolonged vibration.

That is to say, by providing a sealant between the outer edge of the cladding layer and the side wall of the accommodating tank, the sealing performance between the skeleton and the cladding layer can be improved, and the gap between the skeleton and the cladding layer can be guaranteed. between the seal durability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a partial cross-sectional view of a housing provided by an embodiment of the present disclosure;

Fig. 2 is a partial cross-sectional view of a skeleton provided by an embodiment of the present disclosure;

Fig. 3 is a partial cross-sectional view of a cladding layer provided by an embodiment of the present disclosure;

Fig. 4 is a flowchart of a sealing method provided by an embodiment of the present disclosure.

The meanings of the symbols in the figure are as follows:

10. Skeleton;

110. Accommodating tank;

120, filling tank;

130. Expansion slot;

140, the second slope;

20. Covering layer;

210, the first slope;

220, the third slope;

30. Sealant.

detailed description

In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

In ship equipment, in order to realize the lightweight design of the equipment on the basis of ensuring the structural strength of the equipment, the shell of the equipment will be designed as a multi-layer structure.

In the related art, the housing includes a skeleton and a cladding layer, the skeleton is a structural member with high structural strength but relatively heavy weight, and the cladding layer is a structural member with light weight but relatively weak structural strength. Wrapping the cladding layer outside the skeleton can not only support the cladding layer through the skeleton, thereby ensuring the structural strength of the shell, but also reduce the overall weight of the shell through the cladding layer, which can not only reduce the weight of the shell The design is also conducive to the streamlined design of the housing.

Since the operating environment of marine equipment is in water, it is necessary to fully consider the sealing of the shell. However, the butt gap between the skeleton and the cladding layer cannot meet the sealing requirements.

In order to solve the above-mentioned technical problems, an embodiment of the present disclosure provides a housing. FIG. 1 is a partial cross-sectional view of the housing. Referring to FIG. 1, in this embodiment, the housing includes a skeleton 10, a cladding layer 20 and a sealing Glue 30.

FIG. 2 is a partial cross-sectional view of the frame 10 . In order to illustrate the assembly relationship of the cladding layer 20 on the frame 10 , the cladding layer 20 is schematically shown with dotted lines in FIG. 2 but not labeled. 2, the outer side wall of the skeleton 10 has an accommodation groove 110, the groove bottom of the accommodation groove 110 has a filling groove 120, the coating layer 20 is located in the accommodation groove 110, and the outer edge of the coating layer 20 is in contact with the accommodation groove 110. The side walls of the cladding layer 20 and the side walls of the accommodating groove 110 correspond to the filling groove 120, and the sealant 30 is located in the filling groove 120, and is connected to the skeleton 10 and the cladding layer 20 respectively. bonding, so as to seal the joint between the outer edge of the cladding layer 20 and the sidewall of the accommodating groove 110 .

Since the outer wall of the framework 10 has the accommodation groove 110 , the accommodation groove 110 can provide a suitable accommodation space for the cladding layer 20 , ensuring that the cladding layer 20 can be firmly wrapped on the framework 10 . Moreover, a filling groove 120 is provided at the bottom of the accommodating groove 110, and the filling groove 120 is used for filling the sealant 30. In this way, after the cladding layer 20 is wrapped on the skeleton 10, the outer edge of the cladding layer 20 Against the side wall of the accommodation groove 110, the sealant 30 can be bonded to the framework 10 and the cladding layer 20 respectively, thereby sealing the joint between the outer edge of the cladding layer 20 and the side wall of the accommodation groove 110, and then The sealing between the skeleton 10 and the cladding layer 20 is ensured. In addition, since the sealant 30 is bonded to the frame 10 and the cladding layer 20 respectively, the sealant 30 can also absorb the vibration that occurs between the frame 10 and the cladding layer 20, so as to prevent the skeleton 10 and the cladding layer from The seal between 20 fails under prolonged vibration, thus ensuring durability.

That is to say, by disposing the sealant 30 between the outer edge of the cladding layer 20 and the side wall of the accommodating groove 110, the sealing performance between the skeleton 10 and the cladding layer 20 can be improved, and the sealing performance between the skeleton 10 and the cladding layer 20 can be ensured. Seal durability between cladding layers 20 .

Exemplarily, the framework 10 is a metal structural part, and the cladding layer 20 is a fiberglass structural part.

In the above implementation manner, the frame 10 is designed as a metal structural member, which can effectively ensure the structural strength of the frame 10 , thereby providing stable support for the cladding layer 20 . FRP structural parts are structural parts made of glass fiber reinforced plastics bonded by resin. The cladding layer 20 is designed as a glass fiber reinforced plastic structural member, so that the cladding layer 20 has a low-density structural property, thereby effectively reducing the overall weight of the shell, which is conducive to realizing a lightweight design of the shell. Moreover, the FRP structure has the characteristics of high tensile strength and good dimensional stability, so that the elongation of the coating layer 20 is only 3%-4% under the maximum stress condition.

Of course, in other embodiments, the framework 10 and the cladding layer 20 can also use other materials according to requirements, which is not limited in this embodiment of the present disclosure.

It should be noted that, after the sealant 30 is cured, the sealant 30 has good adhesion and hydrolysis resistance, and can be soaked in seawater for a long time without failure.

Exemplarily, the groove wall profile of the filling groove 120 is hemispherical.

The groove wall profile of the filling groove 120 is designed to be hemispherical, so that the sealant 30 in the filling groove 120 can fully contact with the groove wall of the filling groove 120, thereby ensuring the sealant 30 and the groove wall of the filling groove 120. Contact area. Moreover, designing the groove wall profile of the filling groove 120 to be hemispherical can also ensure the volume of the filling groove 120 , that is, the volume of the sealant 30 in a limited space.

In other embodiments, the groove wall profile of the filling groove 120 can also be in other shapes, such as rectangle, triangle, etc., which is not limited in the present disclosure.

In this embodiment, both the frame 10 and the cladding layer 20 are cylindrical structural members, the cladding layer 20 is coaxially sleeved outside the frame 10, and the accommodating groove 110, the filling groove 120 and the expansion groove 130 are all along the sides of the frame 10. Circumferentially extending, that is, the accommodating groove 110 , the filling groove 120 and the expanding groove 130 are all ring-shaped.

Exemplarily, the outer sidewall of the framework 10 is flush with the outer sidewall of the cladding layer 20 .

In the above-mentioned implementation, the outer wall of the framework 10 is flush with the outer wall of the cladding layer 20, which can prevent the outer wall of the framework 10 protruding from the outer wall of the cladding layer 20, or the outer wall of the cladding layer 20 protruding from the outer wall of the cladding layer 20. Interference occurs due to the outer wall of the frame 10 . In addition, the outer wall of the framework 10 is flush with the outer wall of the cladding layer 20, which is beneficial to the streamlined design of the casing.

Fig. 3 is a partial cross-sectional view of the cladding layer 20, with reference to Fig. 3, in this embodiment, the outer edge of the cladding layer 20 has a first slope 210, the first slope 210 faces the filling groove 120, and the first slope 210 is in contact with the accommodating An expansion slot 130 is formed between the side wall and the bottom of the slot 110 , and the expansion slot 130 communicates with the filling slot 120 .

After the cladding layer 20 is assembled in place in the accommodation groove 110, the first slope 210 is opposite to the accommodation groove 110, and the first slope 210 can be in contact with the sealant 30, thereby effectively improving the gap between the cladding layer 20 and the sealant 30. the contact area. Moreover, since the first slope 210 is located at the outer edge of the cladding layer 20, after the cladding layer 20 is assembled in place in the accommodating groove 110, it can be between the outer edge of the cladding layer 20 and the side wall of the accommodating groove 110. A part of the space is set aside, that is, the expansion slot 130 is formed. Also be filled with sealant 30 in expansion groove 130, because expansion groove 130 and filling groove 120 are connected, so the sealant 30 in expansion groove 130 and the sealant 30 in filling groove 120 form a whole, thereby improved the sealant. 30 , the contact area between the framework 10 and the cladding layer 20 , thereby effectively improving the sealing effect and vibration damping effect of the sealant 30 .

Referring to FIG. 2 and FIG. 3 , in this embodiment, the sidewall of the accommodation groove 110 has a second inclined surface 140 , and the second inclined surface 140 is inclined toward the cladding layer 20 in a direction away from the groove bottom of the accommodation groove 110 . The outer edge of the cladding layer 20 has a third slope 220 , and the third slope 220 is opposed to the second slope 140 .

Since the second slope 140 is inclined toward the cladding layer 20 in a direction away from the groove bottom of the accommodating groove 110 , the skeleton 10 transitions to the cladding layer 20 through the second slope 140 . Moreover, the third slope 220 on the coating layer 20 is in contact with the second slope 140 , so the coating layer 20 can be firmly matched with the accommodating groove 110 .

When the casing provided by the embodiments of the present disclosure is applied to marine equipment, the water flow in the casing has a certain flow direction, that is, flows from the skeleton 10 to the cladding layer 20 (direction A in FIG. 1 ). In this way, the contact between the second slope 140 and the third slope 220 can effectively resist the scouring of the water flow, so that the water flow can flow from the skeleton 10 to the cladding layer 20, avoiding the direct scouring of the skeleton 10 and the cladding layer by the water flow. butt joint between layers 20.

In this embodiment, the second inclined surface 140 extends away from the accommodating groove 110 from the notch of the filling groove 120 .

In the above implementation manner, one end of the second slope 140 at the bottom of the accommodation groove 110 is located at the notch of the filling groove 120, so that the sealant 30 overflowing from the filling groove 120 can flow along the second The inclined surface 140 overflows to the expansion slot 130 , preventing the overflowed sealant 30 from overflowing to other unnecessary positions and causing pollution.

In order to prevent the sealant 30 from overflowing out of the receiving groove 110 along the second slope 140 , in this embodiment, the third slope 220 intersects the first slope 210 .

Such a design makes the outer edge of the cladding layer 20 consist of a first slope 210 and a third slope 220, wherein the first slope 210 is used to contact the sealant 30 overflowing along the second slope 140, and the third slope 220 abuts against the second slope 140 , thereby preventing the sealant 30 from continuing to follow the second slope 140 , effectively preventing the sealant 30 from overflowing out of the accommodating groove 110 along the second slope 140 .

Exemplarily, in the extending direction of the second slope 140 , the length of the portion of the second slope 140 that is against the third slope 220 is the same as the length of the portion of the second slope 140 that is in contact with the sealant 30 . That is, the length of the portion of the second slope 140 abutting against the third slope 220 and the length of the portion of the second slope 140 in contact with the sealant 30 are each half the length of the extending direction of the second slope 140 .

In the above implementation manner, not only the contact area between the second slope 140 and the third slope 220 can be ensured, but also the basic area between the second slope 140 and the sealant 30 can be ensured.

Fig. 4 is a flow chart of a sealing method provided by an embodiment of the present disclosure. The sealing method is based on the housing shown in Fig. 1-3. Referring to Fig. 4, the sealing method includes:

Step 401 : Machining a receiving groove 110 on the outer wall of the framework 10 .

In this embodiment, the skeleton 10 is a metal structural member, which can effectively ensure the structural strength of the skeleton 10 , thereby providing stable support for the cladding layer 20 .

Of course, in other embodiments, the framework 10 can also use other materials according to requirements, which is not limited in this embodiment of the present disclosure.

Step 402 : Machining a filling groove 120 at the bottom of the accommodating groove 110 .

Exemplarily, the groove wall profile of the filling groove 120 is hemispherical.

The groove wall profile of the filling groove 120 is designed to be hemispherical, so that the sealant 30 in the filling groove 120 can fully contact with the groove wall of the filling groove 120, thereby ensuring the sealant 30 and the groove wall of the filling groove 120. Contact area. Moreover, designing the groove wall profile of the filling groove 120 to be hemispherical can also ensure the volume of the filling groove 120 , that is, the volume of the sealant 30 in a limited space.

In other embodiments, the groove wall profile of the filling groove 120 can also be in other shapes, such as rectangle, triangle, etc., which is not limited in the present disclosure.

Step 403 : Fill the sealant 30 into the filling groove 120 .

It should be noted that, after the sealant 30 is cured, the sealant 30 has good adhesion and hydrolysis resistance, and can be soaked in seawater for a long time without failure.

Exemplarily, when filling the sealant 30 into the filling groove 120 , it is necessary to fill the filling groove 120 with the sealant 30 and make the sealant 30 overflow the filling groove 120 . Such a design not only ensures that the filling groove 120 is filled with the sealant 30, but also enables the part of the sealant 30 overflowing the filling groove 120 to penetrate between the skeleton 10 and the cladding layer 20, thereby further improving the sealing effect of the sealant 30 on the skeleton 10. and the sealing effect of the cladding layer 20 and the vibration damping effect.

Step 404: Wrap the cladding layer 20 on the framework 10 and place it in the accommodating groove 110, and the outer edge of the cladding layer 20 is against the side wall of the accommodating groove 110, so that the sealant 30 seals the cladding layer 20 The butt joint between the outer edge and the sidewall of the accommodating groove 110 .

In this embodiment, the cladding layer 20 is a fiberglass structural member, which is a structural member made of glass fiber reinforced plastic bonded by resin. The cladding layer 20 is designed as a glass fiber reinforced plastic structural member, so that the cladding layer 20 has a low-density structural property, thereby effectively reducing the overall weight of the shell, which is conducive to realizing a lightweight design of the shell. Moreover, the FRP structure has the characteristics of high tensile strength and good dimensional stability, so that the elongation of the coating layer 20 is only 3%-4% under the maximum stress condition.

Of course, in other embodiments, the cladding layer 20 can also use other materials according to requirements, which is not limited in this embodiment of the present disclosure.

Exemplarily, the outer sidewall of the framework 10 is flush with the outer sidewall of the cladding layer 20 .

In the above-mentioned implementation, the outer wall of the framework 10 is flush with the outer wall of the cladding layer 20, which can prevent the outer wall of the framework 10 protruding from the outer wall of the cladding layer 20, or the outer wall of the cladding layer 20 protruding from the outer wall of the cladding layer 20. Interference occurs due to the outer wall of the frame 10 . In addition, the outer wall of the framework 10 is flush with the outer wall of the cladding layer 20, which is beneficial to the streamlined design of the casing.

In the sealing method provided by the embodiment of the present disclosure, since the outer wall of the framework 10 is processed with the accommodation groove 110, the accommodation groove 110 can provide a suitable accommodation space for the cladding layer 20, ensuring that the cladding layer 20 can be firmly wrapped on the frame 10. And, since the filling groove 120 is processed at the groove bottom of the accommodating groove 110, and the filling groove 120 is filled with the sealant 30, so after the cladding layer 20 is wrapped on the skeleton 10, the outer edge of the cladding layer 20 and the The side walls of the accommodating groove 110 are against each other, and the sealant 30 can be bonded to the frame 10 and the cladding layer 20 respectively, thereby sealing the joint between the outer edge of the cladding layer 20 and the side walls of the accommodating groove 110, thereby ensuring The tightness between the skeleton 10 and the cladding layer 20 is ensured. In addition, since the sealant 30 is bonded to the frame 10 and the cladding layer 20 respectively, the sealant 30 can also absorb the vibration that occurs between the frame 10 and the cladding layer 20, so as to prevent the skeleton 10 and the cladding layer from The seal between 20 fails under prolonged vibration, thus ensuring durability.

That is to say, by disposing the sealant 30 between the outer edge of the cladding layer 20 and the side wall of the accommodating groove 110, the sealing performance between the skeleton 10 and the cladding layer 20 can be improved, and the sealing performance between the skeleton 10 and the cladding layer 20 can be ensured. Seal durability between cladding layers 20 .

In step 401 , a slope is processed on the sidewall of the accommodation groove 110 , so that the slope is inclined toward the cladding layer 20 in a direction away from the groove bottom of the accommodation groove 110 .

Through the slope, it can effectively resist the erosion of the water flow, so that the water flow can flow from the skeleton 10 to the cladding layer 20, avoiding the direct erosion of the water flow at the joint between the skeleton 10 and the cladding layer 20, and effectively improving the shell. body reliability.

Since the sidewall of the accommodation groove 110 has been processed with an inclined plane, the outer edge of the corresponding cladding layer 20 should also have an inclined plane, and the two inclined planes are offset, thus ensuring that the outer edge of the cladding layer 20 is aligned with the accommodation groove 110. The contact area between the side walls of the cladding layer 20 and the side walls of the accommodating groove 110 are firmly fitted together.

Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those having ordinary skill in the art to which the present disclosure belongs. "First", "second", "third" and similar words used in the specification and claims of this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components . Likewise, words like "a" or "one" do not denote a limitation in quantity, but indicate that there is at least one. Words such as "comprises" or "comprising" and similar terms mean that the elements or items listed before "comprising" or "comprising" include the elements or items listed after "comprising" or "comprising" and their equivalents, and do not exclude other component or object. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

The above descriptions are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection of the present disclosure. within range.

Claims (10)

1. A shell is characterized by comprising a framework (10), a coating layer (20) and a sealant (30);

the outer side wall of the framework (10) is provided with a containing groove (110), and the bottom of the containing groove (110) is provided with a filling groove (120);

the coating layer (20) is positioned in the accommodating groove (110), the outer edge of the coating layer (20) is abutted against the side wall of the accommodating groove (110), and the butt joint between the outer edge of the coating layer (20) and the side wall of the accommodating groove (110) corresponds to the filling groove (120);

the sealant (30) is positioned in the filling groove (120) and is respectively bonded with the framework (10) and the coating layer (20) so as to seal the butt joint between the outer edge of the coating layer (20) and the side wall of the accommodating groove (110).

2. The housing according to claim 1, characterized in that the outer edge of the cladding (20) has a first bevel (210);

the first inclined surface (210) faces the filling groove (120), an expansion groove (130) is formed between the first inclined surface (210) and the side wall and the bottom of the accommodating groove (110), and the expansion groove (130) is communicated with the filling groove (120).

3. The housing according to claim 2, wherein the side wall of the receiving groove (110) has a second slope (140);

the second inclined surface (140) is inclined towards the coating layer (20) in a groove bottom direction away from the accommodating groove (110);

the outer edge of the cladding layer (20) is provided with a third inclined surface (220), and the third inclined surface (220) is abutted against the second inclined surface (140).

4. The housing according to claim 3, characterized in that the second ramp (140) extends away from the receiving groove (110) at the mouth of the filling groove (120).

5. The housing of claim 3, wherein the third ramp (220) intersects the first ramp (210).

6. The housing according to any of claims 1 to 5, characterized in that the groove wall profile of the filling groove (120) is hemispherical.

7. The housing according to any of claims 1 to 5, characterized in that the outer side wall of the skeleton (10) is flush with the outer side wall of the cladding (20).

8. The housing according to any of claims 1 to 5, wherein the skeleton (10) is a metal structure and the cladding (20) is a glass fiber reinforced plastic structure.

9. A method of sealing, comprising:

processing a containing groove (110) on the outer side wall of the framework (10);

machining a filling groove (120) at the bottom of the accommodating groove (110);

filling the sealant (30) into the filling groove (120);

wrapping the coating layer (20) on the framework (10) and in the containing groove (110), wherein the outer edge of the coating layer (20) is abutted against the side wall of the containing groove (110), so that the sealant (30) seals the butt joint between the outer edge of the coating layer (20) and the side wall of the containing groove (110).

10. The sealing method according to claim 9, wherein filling the sealant (30) into the filling groove (120) comprises:

and filling the filling groove (120) with the sealant (30) and enabling the sealant (30) to overflow the filling groove (120).

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