Housing and sealing method

Abstract

The present disclosure provides a housing and sealing method, belonging to the field of mechanical assembly technology. The housing comprises a frame, a coating, and a sealant. The outer wall of the frame has a receiving groove, and the bottom of the receiving groove has a filling groove. The coating is located within the receiving groove, with the outer edge of the coating abutting against the side wall of the receiving groove, and the joint between the outer edge of the coating and the side wall of the receiving groove corresponds to the filling groove. The sealant is located within the filling groove and adheres to the frame and coating, respectively, to seal the joint between the outer edge of the coating and the side wall of the receiving groove. The present disclosure can ensure the sealing and durability of the housing.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of mechanical assembly, and in particular relates to a housing and a sealing method. Background Art

[0002] In ship equipment, in order to achieve lightweight design of the equipment while ensuring the structural strength of the equipment, the shell of the equipment will be designed as a multi-layer structure.

[0003] In related art, a housing consists of a skeleton and a cladding layer. The skeleton is a structural component with high structural strength but relatively heavy weight, while the cladding is a structural component with light weight but relatively weak structural strength. Wrapping the cladding layer around the skeleton not only supports the cladding layer through the skeleton, thereby ensuring the structural strength of the housing, but also reduces the overall weight of the housing through the cladding layer, achieving a lightweight design for the housing and facilitating a streamlined design.

[0004] Since ship equipment is used in water, the sealing of the shell must be fully considered. However, the joint gap between the frame and the cladding cannot meet the sealing requirements. Summary of the Invention

[0005] The embodiments of the present disclosure provide a housing and a sealing method that can ensure the sealing and durability of the housing. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a housing, comprising a frame, a coating layer and a sealant;

[0007] The outer side wall of the frame has a receiving groove, and the bottom of the receiving groove has a filling groove;

[0008] The coating layer is located in the receiving groove, the outer edge of the coating layer abuts against the side wall of the receiving groove, and the joint between the outer edge of the coating layer and the side wall of the receiving groove corresponds to the filling groove;

[0009] The sealant is located in the filling groove and is respectively bonded to the frame and the covering layer to seal the joint between the outer edge of the covering layer and the side wall of the receiving groove.

[0010] In one implementation of the present disclosure, the outer edge of the cladding layer has a first slope;

[0011] The first inclined surface faces the filling groove, and an expansion groove is formed between the first inclined surface and the side wall and groove bottom of the accommodating groove. The expansion groove is communicated with the filling groove.

[0012] In another implementation of the present disclosure, the sidewall of the accommodating groove has a second inclined surface;

[0013] In a direction away from the bottom of the accommodating groove, the second inclined surface is inclined toward the coating layer;

[0014] The outer edge of the cladding layer has a third inclined surface, and the third inclined surface abuts against the second inclined surface.

[0015] In yet another implementation of the present disclosure, the second inclined surface extends from the notch of the filling groove away from the accommodating groove.

[0016] In yet another implementation of the present disclosure, the third inclined surface intersects with the first inclined surface.

[0017] In yet another implementation of the present disclosure, the wall profile of the filling groove is hemispherical.

[0018] In yet another implementation of the present disclosure, the outer side wall of the skeleton is flush with the outer side wall of the covering layer.

[0019] In another implementation of the present disclosure, the skeleton is a metal structural member, and the cladding layer is a fiberglass reinforced plastic structural member.

[0020] An embodiment of the present disclosure provides a sealing method, the sealing method comprising:

[0021] A receiving groove is machined on the outer side wall of the frame;

[0022] Processing a filling groove at the bottom of the accommodating groove;

[0023] Filling the sealant into the filling groove;

[0024] The covering layer is wrapped around the frame and located in the receiving groove, and the outer edge of the covering layer abuts against the side wall of the receiving groove so that the sealant seals the joint between the outer edge of the covering layer and the side wall of the receiving groove.

[0025] In one implementation of the present disclosure, filling the sealant into the filling groove includes:

[0026] The filling groove is filled with the sealant, and the sealant overflows the filling groove.

[0027] The beneficial effects of the technical solutions provided by the embodiments of the present disclosure include at least:

[0028] Since the outer wall of the frame has a receiving groove, the receiving groove can provide a suitable receiving space for the coating layer, ensuring that the coating layer can be firmly wrapped on the frame. In addition, a filling groove is provided at the bottom of the receiving groove, and the filling groove is used to fill the sealant. In this way, after the coating layer is wrapped on the frame, the outer edge of the coating layer abuts against the side wall of the receiving groove, and the sealant can be bonded to the frame and the coating layer respectively, thereby sealing the joint between the outer edge of the coating layer and the side wall of the receiving groove, thereby ensuring the sealing between the frame and the coating layer. In addition, since the sealant is bonded to the frame and the coating layer respectively, the sealant can also absorb the vibration between the frame and the coating layer to prevent the seal between the frame and the coating layer from failing under long-term vibration, thereby ensuring durability.

[0029] That is to say, by providing a sealant between the outer edge of the covering layer and the side wall of the receiving groove, the sealing performance between the skeleton and the covering layer can be improved, and the sealing durability between the skeleton and the covering layer can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 is a partial cross-sectional view of a housing provided by an embodiment of the present disclosure;

[0032] Figure 2 is a partial cross-sectional view of a skeleton provided by an embodiment of the present disclosure;

[0033] Figure 3 is a partial cross-sectional view of a coating layer provided by an embodiment of the present disclosure;

[0034] Figure 4 It is a flow chart of the sealing method provided by an embodiment of the present disclosure.

[0035] The symbols in the figure mean the following:

[0036] 10. Skeleton;

[0037] 110. accommodating tank;

[0038] 120, filling tank;

[0039] 130. Expansion slot;

[0040] 140. Second inclined plane;

[0041] 20. Coating layer;

[0042] 210, first inclined plane;

[0043] 220, third slope;

[0044] 30. Sealant. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0046] In ship equipment, in order to achieve lightweight design of the equipment while ensuring the structural strength of the equipment, the shell of the equipment will be designed as a multi-layer structure.

[0047] In related art, a housing consists of a skeleton and a cladding layer. The skeleton is a structural component with high structural strength but relatively heavy weight, while the cladding is a structural component with light weight but relatively weak structural strength. Wrapping the cladding layer around the skeleton not only supports the cladding layer through the skeleton, thereby ensuring the structural strength of the housing, but also reduces the overall weight of the housing through the cladding layer, achieving a lightweight design for the housing and facilitating a streamlined design.

[0048] Since ship equipment is used in water, the sealing of the shell must be fully considered. However, the joint gap between the frame and the cladding cannot meet the sealing requirements.

[0049] In order to solve the above technical problems, the present disclosure provides a housing. Figure 1 This is a partial cross-sectional view of the housing, see Figure 1 In this embodiment, the shell includes a frame 10, a covering layer 20 and a sealant 30.

[0050] Figure 2 It is a partial cross-sectional view of the skeleton 10. In order to show the assembly relationship of the coating layer 20 on the skeleton 10, Figure 2 The coating layer 20 is indicated by a dotted line but not numbered. Figure 2 The outer wall of the frame 10 has a receiving groove 110, and the bottom of the receiving groove 110 has a filling groove 120. The covering layer 20 is located in the receiving groove 110, and the outer edge of the covering layer 20 is against the side wall of the receiving groove 110, and the joint between the outer edge of the covering layer 20 and the side wall of the receiving groove 110 corresponds to the filling groove 120. The sealant 30 is located in the filling groove 120 and is respectively bonded to the frame 10 and the covering layer 20 to seal the joint between the outer edge of the covering layer 20 and the side wall of the receiving groove 110.

[0051] Since the outer wall of the frame 10 has a receiving groove 110, the receiving groove 110 can provide a suitable receiving space for the covering layer 20, ensuring that the covering layer 20 can be firmly wrapped on the frame 10. In addition, a filling groove 120 is provided at the bottom of the receiving groove 110, and the filling groove 120 is used to fill the sealant 30. In this way, after the covering layer 20 is wrapped on the frame 10, the outer edge of the covering layer 20 abuts against the side wall of the receiving groove 110, and the sealant 30 can be bonded to the frame 10 and the covering layer 20 respectively, thereby sealing the joint between the outer edge of the covering layer 20 and the side wall of the receiving groove 110, thereby ensuring the sealing between the frame 10 and the covering layer 20. In addition, since the sealant 30 is bonded to the skeleton 10 and the covering layer 20 respectively, the sealant 30 can also absorb the vibration between the skeleton 10 and the covering layer 20 to avoid the failure of the seal between the skeleton 10 and the covering layer 20 under long-term vibration, thereby ensuring durability.

[0052] That is to say, by providing the sealant 30 between the outer edge of the covering layer 20 and the side wall of the receiving groove 110 , the sealing performance between the skeleton 10 and the covering layer 20 can be improved, and the sealing durability between the skeleton 10 and the covering layer 20 can be ensured.

[0053] Exemplarily, the frame 10 is a metal structural member, and the cladding layer 20 is a fiberglass reinforced plastic structural member.

[0054] In the above implementation, the skeleton 10 is designed as a metal structure, which effectively ensures its structural strength, thereby providing stable support for the cladding layer 20. A fiberglass reinforced plastic (FRP) structure is a structure made by bonding glass fiber reinforced plastic (GRP) with a resin. Designing the cladding layer 20 as a FRP structure gives it a low-density structure, effectively reducing the overall weight of the housing and facilitating a lightweight design. Furthermore, the FRP structure has high tensile strength and good dimensional stability, resulting in an elongation of only 3% to 4% for the cladding layer 20 under maximum stress.

[0055] Of course, in other embodiments, the skeleton 10 and the covering layer 20 can also be made of other materials according to needs, and the embodiments of the present disclosure do not limit this.

[0056] It should be noted that after the sealant 30 is cured, the sealant 30 has good adhesion and hydrolysis resistance and can be immersed in seawater for a long time without becoming ineffective.

[0057] Exemplarily, the groove wall profile of the filling groove 120 is hemispherical.

[0058] The hemispherical design of the wall profile of the filling groove 120 allows the sealant 30 in the filling groove 120 to fully contact the wall of the filling groove 120, thereby ensuring the contact area between the sealant 30 and the wall of the filling groove 120. Furthermore, the hemispherical design of the wall profile of the filling groove 120 can ensure the volume of the filling groove 120, and therefore the volume of the sealant 30, within a limited space.

[0059] In other embodiments, the groove wall profile of the filling groove 120 can also be other shapes, such as rectangle, triangle, etc., which is not limited in the present disclosure.

[0060] In this embodiment, the skeleton 10 and the covering layer 20 are both cylindrical structural parts, the covering layer 20 is coaxially sleeved outside the skeleton 10, and the accommodating groove 110, the filling groove 120 and the expansion groove 130 all extend along the circumference of the skeleton 10, that is, the accommodating groove 110, the filling groove 120 and the expansion groove 130 are all annular.

[0061] Exemplarily, the outer sidewall of the skeleton 10 is flush with the outer sidewall of the covering layer 20 .

[0062] In the above implementation, the outer wall of the frame 10 is flush with the outer wall of the covering layer 20, which can avoid interference caused by the outer wall of the frame 10 protruding from the outer wall of the covering layer 20, or vice versa. In addition, the outer wall of the frame 10 is flush with the outer wall of the covering layer 20, which is conducive to the streamlined design of the shell.

[0063] Figure 3 It is a partial cross-sectional view of the coating layer 20, combined with Figure 3 In this embodiment, the outer edge of the covering layer 20 has a first inclined surface 210, and 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 groove bottom of the accommodating groove 110, and the expansion groove 130 is connected to the filling groove 120.

[0064] After the covering layer 20 is fully assembled within the receiving groove 110, the first inclined surface 210 faces the receiving groove 110 and can contact the sealant 30, thereby effectively increasing the contact area between the covering layer 20 and the sealant 30. Furthermore, because the first inclined surface 210 is located at the outer edge of the covering layer 20, after the covering layer 20 is fully assembled within the receiving groove 110, a portion of space is left between the outer edge of the covering layer 20 and the sidewall of the receiving groove 110, thereby forming an expansion groove 130. The expansion groove 130 is also filled with sealant 30. Since the expansion groove 130 and the filling groove 120 are connected, the sealant 30 in the expansion groove 130 and the sealant 30 in the filling groove 120 form a single unit, thereby increasing the contact area between the sealant 30 and the frame 10 and the covering layer 20, thereby effectively improving the sealing and vibration reduction effects of the sealant 30.

[0065] Combine Figure 2 and Figure 3 In this embodiment, the sidewall of the receiving groove 110 has a second inclined surface 140, which is inclined toward the cladding layer 20 in a direction away from the bottom of the receiving groove 110. The outer edge of the cladding layer 20 has a third inclined surface 220, which abuts against the second inclined surface 140.

[0066] Since the second inclined surface 140 is inclined away from the bottom of the receiving groove 110 and toward the coating layer 20, the frame 10 transitions to the coating layer 20 through the second inclined surface 140. In addition, the third inclined surface 220 on the coating layer 20 abuts against the second inclined surface 140, so the coating layer 20 can be firmly matched with the receiving groove 110.

[0067] When the shell provided by the embodiment of the present disclosure is applied to ship equipment, the water flow in the shell has a certain flow direction, that is, it flows from the skeleton 10 to the coating layer 20 ( Figure 1 In this way, the second inclined surface 140 and the third inclined surface 220 offset each other, which can effectively resist the scouring of water flow, allowing the water flow to flow from the skeleton 10 to the covering layer 20, thereby preventing the water flow from directly scouring the joint between the skeleton 10 and the covering layer 20.

[0068] In this embodiment, the second inclined surface 140 extends from the opening of the filling groove 120 away from the receiving groove 110 .

[0069] In the above implementation, one end of the second inclined surface 140 located at the bottom of the accommodating groove 110 is located at the groove opening of the filling groove 120. In this way, the sealant 30 overflowing from the filling groove 120 can overflow along the second inclined surface 140 to the expansion groove 130, thereby preventing the overflowed sealant 30 from overflowing to other unnecessary locations and causing pollution.

[0070] In order to prevent the sealant 30 from overflowing out of the receiving groove 110 along the second inclined surface 140 , in this embodiment, the third inclined surface 220 intersects with the first inclined surface 210 .

[0071] Such a design makes the outer edge of the covering layer 20 consist of a first bevel 210 and a third bevel 220, wherein the first bevel 210 is used to contact the sealant 30 overflowing along the second bevel 140, and the third bevel 220 is used to abut against the second bevel 140, thereby preventing the sealant 30 from continuing along the second bevel 140, effectively preventing the sealant 30 from overflowing out of the accommodating groove 110 along the second bevel 140.

[0072] For example, in the extension direction of the second inclined surface 140, the length of the portion of the second inclined surface 140 that abuts the third inclined surface 220 is the same as the length of the portion of the second inclined surface 140 that contacts the sealant 30. In other words, the length of the portion of the second inclined surface 140 that abuts the third inclined surface 220 and the length of the portion of the second inclined surface 140 that contacts the sealant 30 are each half the length of the second inclined surface 140 in the extension direction.

[0073] In the above implementation, both the contact area between the second inclined surface 140 and the third inclined surface 220 and the basic area between the second inclined surface 140 and the sealant 30 can be ensured.

[0074] Figure 4 A flowchart of a sealing method provided in an embodiment of the present disclosure, the sealing method is based on Figure 1-3 The housing shown, see Figure 4 , the sealing method comprises:

[0075] Step 401 : Processing a receiving groove 110 on the outer wall of the frame 10 .

[0076] In this embodiment, the frame 10 is a metal structural member, which can effectively ensure the structural strength of the frame 10 and thus provide stable support for the covering layer 20 .

[0077] Of course, in other embodiments, the skeleton 10 can also be made of other materials according to needs, and the embodiments of the present disclosure do not limit this.

[0078] Step 402 : Processing a filling groove 120 at the bottom of the receiving groove 110 .

[0079] Exemplarily, the groove wall profile of the filling groove 120 is hemispherical.

[0080] The hemispherical design of the wall profile of the filling groove 120 allows the sealant 30 in the filling groove 120 to fully contact the wall of the filling groove 120, thereby ensuring the contact area between the sealant 30 and the wall of the filling groove 120. Furthermore, the hemispherical design of the wall profile of the filling groove 120 can ensure the volume of the filling groove 120, and therefore the volume of the sealant 30, within a limited space.

[0081] In other embodiments, the groove wall profile of the filling groove 120 can also be other shapes, such as rectangle, triangle, etc., which is not limited in the present disclosure.

[0082] Step 403 : Fill the sealing adhesive 30 into the filling groove 120 .

[0083] It should be noted that after the sealant 30 is cured, the sealant 30 has good adhesion and hydrolysis resistance and can be immersed in seawater for a long time without becoming ineffective.

[0084] For example, when filling the filling groove 120 with the sealant 30, the sealant 30 needs to be completely filled in the filling groove 120 and allowed to overflow the filling groove 120. This design not only ensures that the filling groove 120 is fully filled with the sealant 30, but also allows a portion of the sealant 30 that overflows the filling groove 120 to penetrate between the frame 10 and the covering layer 20, thereby further improving the sealing effect and vibration reduction effect of the sealant 30 on the frame 10 and the covering layer 20.

[0085] Step 404: Wrap the covering layer 20 on the frame 10 and position it in the receiving groove 110, with the outer edge of the covering layer 20 abutting against the side wall of the receiving groove 110 so that the sealant 30 seals the joint between the outer edge of the covering layer 20 and the side wall of the receiving groove 110.

[0086] In this embodiment, the cladding layer 20 is a fiberglass reinforced plastic (FRP) structural member. This is a structural member formed by bonding glass fiber reinforced plastic (GRP) with a resin. Designing the cladding layer 20 as a FRP structural member provides it with a low density, effectively reducing the overall weight of the housing and facilitating a lightweight design. Furthermore, FRP structural members possess high tensile strength and excellent dimensional stability, resulting in an elongation of only 3% to 4% under maximum stress conditions.

[0087] Of course, in other embodiments, the covering layer 20 can also be made of other materials according to needs, and the embodiments of the present disclosure do not limit this.

[0088] Exemplarily, the outer sidewall of the skeleton 10 is flush with the outer sidewall of the covering layer 20 .

[0089] In the above implementation, the outer wall of the frame 10 is flush with the outer wall of the covering layer 20, which can avoid interference caused by the outer wall of the frame 10 protruding from the outer wall of the covering layer 20, or vice versa. In addition, the outer wall of the frame 10 is flush with the outer wall of the covering layer 20, which is conducive to the streamlined design of the shell.

[0090] In the sealing method provided in the embodiment of the present disclosure, since the outer wall of the frame 10 is processed with a receiving groove 110, the receiving groove 110 can provide a suitable receiving space for the covering layer 20, thereby ensuring that the covering layer 20 can be firmly wrapped on the frame 10. In addition, since the bottom of the receiving groove 110 is processed with a filling groove 120 and the filling groove 120 is filled with a sealant 30, after the covering layer 20 is wrapped on the frame 10, the outer edge of the covering layer 20 abuts against the side wall of the receiving groove 110, and the sealant 30 can be bonded to the frame 10 and the covering layer 20 respectively, thereby sealing the joint between the outer edge of the covering layer 20 and the side wall of the receiving groove 110, thereby ensuring the sealing between the frame 10 and the covering layer 20. In addition, since the sealant 30 is bonded to the skeleton 10 and the covering layer 20 respectively, the sealant 30 can also absorb the vibration between the skeleton 10 and the covering layer 20 to avoid the failure of the seal between the skeleton 10 and the covering layer 20 under long-term vibration, thereby ensuring durability.

[0091] That is to say, by providing the sealant 30 between the outer edge of the covering layer 20 and the side wall of the receiving groove 110 , the sealing performance between the skeleton 10 and the covering layer 20 can be improved, and the sealing durability between the skeleton 10 and the covering layer 20 can be ensured.

[0092] In step 401 , a slope is machined on the sidewall of the receiving groove 110 , such that the slope is inclined toward the cladding layer 20 in a direction away from the bottom of the receiving groove 110 .

[0093] The inclined surface can effectively resist the scouring of water flow, so that the water flow can flow along the skeleton 10 to the covering layer 20, avoiding the water flow from directly scouring the joint between the skeleton 10 and the covering layer 20, and effectively improving the reliability of the shell.

[0094] Since the side wall of the accommodating groove 110 is processed into a bevel, the outer edge of the corresponding cladding layer 20 should also have a bevel. The two bevels offset each other, thereby ensuring the contact area between the outer edge of the cladding layer 20 and the side wall of the accommodating groove 110, so that the outer edge of the cladding layer 20 and the side wall of the accommodating groove 110 are firmly assembled together.

[0095] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present disclosure belongs. The words “first”, “second”, “third” and similar terms used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as “a” or “an” do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as “include” or “comprise” mean that the elements or objects appearing before “include” or “comprises” include the elements or objects listed after “include” or “comprises” and their equivalents, and do not exclude other elements or objects. Words such as “connect” or “connected” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0096] The above description is merely an optional embodiment of the present disclosure and is 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 scope of protection of the present disclosure.

Claims

1. A housing, characterized in that: It includes a skeleton (10), a coating layer (20) and a sealant (30); The outer side wall of the frame (10) has a receiving groove (110), and the bottom of the receiving groove (110) has a filling groove (120); The coating layer (20) is located in the receiving groove (110), the outer edge of the coating layer (20) is against the side wall of the receiving groove (110), and the joint between the outer edge of the coating layer (20) and the side wall of the receiving groove (110) corresponds to the filling groove (120), the outer edge of the coating layer (20) has a first inclined surface (210), the first inclined surface (210) faces the filling groove (120), and the first inclined surface (210) and the receiving groove (120) are aligned. An expansion groove (130) is formed between the side wall and the bottom of the groove (10), the expansion groove (130) is connected to the filling groove (120), the side wall of the accommodating groove (110) has a second inclined surface (140), in the direction away from the bottom of the accommodating groove (110), the second inclined surface (140) is inclined toward the cladding layer (20), the outer edge of the cladding layer (20) has a third inclined surface (220), and the third inclined surface (220) is against the second inclined surface (140); The sealant (30) is located in the filling groove (120) and is bonded to the frame (10) and the covering layer (20) respectively to seal the joint between the outer edge of the covering layer (20) and the side wall of the accommodating groove (110). The sealant (30) in the expansion groove (130) and the sealant (30) in the filling groove (120) form a whole.

2. The housing according to claim 1, wherein: The second inclined surface (140) extends from the notch of the filling groove (120) away from the accommodating groove (110).

3. The housing according to claim 1, wherein: The third inclined surface (220) intersects with the first inclined surface (210).

4. The housing according to any one of claims 1 to 3, characterized in that: The groove wall profile of the filling groove (120) is hemispherical.

5. The housing according to any one of claims 1 to 3, characterized in that: The outer side wall of the skeleton (10) is flush with the outer side wall of the coating layer (20).

6. The housing according to any one of claims 1 to 3, characterized in that: The skeleton (10) is a metal structural component, and the cladding layer (20) is a glass fiber reinforced plastic structural component.

7. A sealing method, characterized in that: The sealing method is based on the housing according to claim 1, and the sealing method includes: A receiving groove (110) is machined on the outer side wall of the frame (10); A filling groove (120) is machined at the bottom of the accommodating groove (110); Filling the sealant (30) into the filling groove (120); The coating layer (20) is wrapped around the frame (10) and is located in the receiving groove (110), and the outer edge of the coating layer (20) is abutted against the side wall of the receiving groove (110), so that the sealant (30) seals the joint between the outer edge of the coating layer (20) and the side wall of the receiving groove (110).

8. The sealing method according to claim 7, characterized in that: Filling the sealant (30) into the filling groove (120) includes: The filling groove (120) is filled with the sealant (30), and the sealant (30) overflows the filling groove (120).

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