阅读说明：本技术 海上风机设备平台及其柜体的安装方法、海上风机 (Offshore wind turbine equipment platform, installation method of cabinet body of offshore wind turbine equipment platform and offshore wind turbine ) 是由 周昳鸣 李卫东 郭小江 刘鑫 杨立华 管春雨 姜绪良 桂洪波 孙小军 袁辉 刘立 于 2021-06-28 设计创作，主要内容包括：本发明的实施例提出一种海上风机设备平台及其柜体的安装方法、海上风机。根据本发明实施例的海上风机设备平台,包括：平台；平台梁,所述平台梁设在所述平台上；多个安装台,多个所述安装台间隔开地设在所述平台梁上,每个所述安装台上设有开口向上的卡槽,所述卡槽包括相连的下沉固定段和滑动段,所述下沉固定段的底面位于所述滑动段的底面下方；和柜体,所述柜体包括本体和多个设在所述本体的底部的卡槽柱,多个所述卡槽柱一一对应地与多个所述安装台的所述卡槽配合,每个所述卡槽柱通过所述滑动段滑入所述下沉固定段内。因此,根据本发明实施例的海上风机设备平台具有便于将柜体安装到平台梁和安装稳定性高的优点。(The embodiment of the invention provides an offshore wind turbine equipment platform, an installation method of a cabinet body of the offshore wind turbine equipment platform and an offshore wind turbine. According to the embodiment of the invention, the offshore wind turbine equipment platform comprises: a platform; the platform beam is arranged on the platform; the mounting platforms are arranged on the platform beam at intervals, each mounting platform is provided with a clamping groove with an upward opening, each clamping groove comprises a sinking fixed section and a sliding section which are connected, and the bottom surface of the sinking fixed section is positioned below the bottom surface of the sliding section; and the cabinet body, the cabinet body includes the body and establishes a plurality of draw-in groove post of the bottom of body, it is a plurality of the draw-in groove post one-to-one ground is with a plurality of the mount table the draw-in groove cooperation, every the draw-in groove post passes through the slip section slides in sink in the fixed section. Therefore, the offshore wind turbine equipment platform has the advantages of convenience in mounting the cabinet body on the platform beam and high mounting stability.)

1. The utility model provides an offshore wind turbine equipment platform which characterized in that includes:

a platform;

the platform beam is arranged on the platform;

the mounting platforms are arranged on the platform beam at intervals, each mounting platform is provided with a clamping groove with an upward opening, each clamping groove comprises a sinking fixed section and a sliding section which are connected, and the bottom surface of the sinking fixed section is positioned below the bottom surface of the sliding section; and

the cabinet body, the cabinet body includes the body and establishes a plurality of draw-in groove post of the bottom of body, and is a plurality of draw-in groove post one-to-one ground and a plurality of the mount table the draw-in groove cooperation, every the draw-in groove post passes through the slip section slips into in the fixed section sinks.

2. The offshore wind turbine installation platform of claim 1,

the sliding section comprises a first sliding section and a second sliding section which are connected with each other, the first sliding section and the second sliding section are straight sections, the second sliding section is connected with the sinking fixing section, and the extending direction of the first sliding section is crossed with the extending direction of the second sliding section;

the sinking fixing section comprises a first side wall surface, a second side wall surface and a third side wall surface, the first side wall surface and the second side wall surface are arranged oppositely, and the second side wall surface and the sliding section are arranged oppositely.

3. The offshore wind turbine facility platform of claim 2, wherein a portion of the bottom surface of the sunken fixed section is a sloped surface, and an upper end of the sloped surface is connected to the bottom surface of the sliding section.

4. The offshore wind turbine installation platform of claim 3, wherein the first, second, and third sidewall surfaces are provided with first horizontal extending ribs, and the slot posts are provided with horizontal annular first grooves that mate with the first ribs.

5. The offshore wind turbine equipment platform of claim 2, wherein the bottom surface of the sinking fixation section is an inclined surface, the upper end of the inclined surface is connected with the bottom surface of the sliding section, the bottom surface of the slot column is an inclined surface, and the bottom surface of the slot column is matched with the bottom surface of the sinking fixation section.

6. The offshore wind turbine installation platform of claim 5, wherein the second sidewall surface is provided with a horizontally extending first rib, and the slot post is provided with a horizontally annular first groove, the first groove being engaged with the first rib.

7. The offshore wind turbine installation platform according to any of claim 2, the card slot comprising a card slot entrance located at an end of the first sliding segment, the first sliding segment increasing in width in a direction adjacent the card slot entrance.

8. The offshore wind turbine installation platform according to claim 4 or 6, wherein the slot columns are provided with second ribs extending in an up-down direction, the second ribs are located below the first grooves, the side wall surfaces of the sinking fixing sections are provided with second grooves extending in an up-down direction, and the second ribs are matched with the second grooves.

9. An offshore wind turbine comprising the offshore wind turbine installation platform of any of claims 1 to 8.

10. A method of installing the offshore wind turbine installation platform cabinet of any of claims 1 to 8, comprising the steps of:

A) arranging the platform beam on the platform, and arranging a plurality of mounting platforms on the platform beam;

B) installing a plurality of the slot columns on the bottom surface of the body of the cabinet body, wherein the slot columns are matched with the slots of the installation platforms in a one-to-one correspondence manner, so that the slot columns can enter the sinking fixing section at the same time;

C) moving the cabinet body and enabling the clamping groove column below the cabinet body to enter the sliding section of the clamping groove; and

D) and sliding the cabinet body so that the slot clamping column slides into the sinking fixing section from the sliding section.

Technical Field

The invention relates to the technical field of offshore wind turbines, in particular to an offshore wind turbine equipment platform, a cabinet body installation method thereof and an offshore wind turbine.

Background

In the related art, the types of fixed infrastructure used in offshore wind farms are mainly: (1) single pile foundation; (2) a high pile cap foundation; (3) a gravity foundation; (4) and (4) a jacket foundation.

No matter which kind of basic type, general electric cabinet body all sets up on pylon and basic inner platform, and equipment cabinets such as living cabin, diesel generator, navigation mark lamp set up on the platform outside the basis. At present, most of cabinets are connected with platforms through bolt design. If the manufacturing precision is not well controlled or the platform deforms in the installation process, more time is needed for aligning, the bolt needs to be forcibly knocked into the bolt hole by bolt hole, and the fatigue life of the bolt is greatly influenced by the shearing force in the process. Air and salt mist ingress can corrode, which is detrimental to maintenance.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides an offshore wind turbine equipment platform, an installation method of a cabinet body of the offshore wind turbine equipment platform and an offshore wind turbine.

According to the embodiment of the invention, the offshore wind turbine equipment platform comprises:

a platform;

the platform beam is arranged on the platform;

the mounting platforms are arranged on the platform beam at intervals, each mounting platform is provided with a clamping groove with an upward opening, each clamping groove comprises a sinking fixed section and a sliding section which are connected, and the bottom surface of the sinking fixed section is positioned below the bottom surface of the sliding section; and

the cabinet body, the cabinet body includes the body and establishes a plurality of draw-in groove post of the bottom of body, and is a plurality of draw-in groove post one-to-one ground and a plurality of the mount table the draw-in groove cooperation, every the draw-in groove post passes through the slip section slips into in the fixed section sinks.

Therefore, the offshore wind turbine equipment platform has the advantages of convenience in mounting the cabinet body on the platform beam and high mounting stability.

In some embodiments, the sliding section comprises a first sliding section and a second sliding section which are connected with each other, the first sliding section and the second sliding section are straight sections, the second sliding section is connected with the sinking fixing section, and the extending direction of the first sliding section is crossed with the extending direction of the second sliding section;

the sinking fixing section comprises a first side wall surface, a second side wall surface and a third side wall surface, the first side wall surface and the second side wall surface are arranged oppositely, and the second side wall surface and the sliding section are arranged oppositely.

In some embodiments, a portion of the bottom surface of the sinking fixation section is an inclined surface, and an upper end of the inclined surface is connected with the bottom surface of the sliding section.

In some embodiments, the first side wall surface, the second side wall surface and the third side wall surface are provided with first ribs extending in the horizontal direction, and the slot columns are provided with annular first grooves in the horizontal direction, wherein the first grooves are matched with the first ribs.

In some embodiments, the bottom surface of the sinking fixing section is an inclined surface, the upper end of the inclined surface is connected with the bottom surface of the sliding section, the bottom surface of the slot clamping column is an inclined surface, and the bottom surface of the slot clamping column is matched with the bottom surface of the sinking fixing section.

In some embodiments, the second side wall surface is provided with a first rib extending in the horizontal direction, and the slot column is provided with a first annular groove in the horizontal direction, and the first groove is matched with the first rib.

In some embodiments, the card slot includes a card slot entrance at an end of the first sliding section, the first sliding section increasing in width in a direction adjacent the card slot entrance.

In some embodiments, a second rib extending in the up-down direction is arranged on the slot column, the second rib is located below the first groove, a second groove extending in the up-down direction is arranged on the side wall surface of the sinking fixing section, and the second rib is matched with the second groove.

The application also provides an offshore wind turbine, including the offshore wind turbine equipment platform of any one of the foregoing.

The application also provides an installation method of the cabinet body of the offshore wind turbine equipment platform, which comprises the following steps:

A) arranging the platform beam on the platform, and arranging a plurality of mounting platforms on the platform beam;

B) installing a plurality of the slot columns on the bottom surface of the body of the cabinet body, wherein the slot columns are matched with the slots of the installation platforms in a one-to-one correspondence manner, so that the slot columns can enter the sinking fixing section at the same time;

C) moving the cabinet body and enabling the clamping groove column below the cabinet body to enter the sliding section of the clamping groove; and

D) and sliding the cabinet body so that the slot clamping column slides into the sinking fixing section from the sliding section.

Drawings

FIG. 1 is a schematic illustration of an offshore wind turbine installation platform according to an embodiment of the present invention.

FIG. 2 is a schematic illustration of an offshore wind turbine installation platform according to an embodiment of the present invention.

Fig. 3 is a schematic view of a mounting station according to an embodiment of the invention.

Fig. 4 is a schematic view of a mounting station according to an embodiment of the invention.

Fig. 5 is a schematic view of a mounting station according to an embodiment of the invention.

Fig. 6 is a schematic view of a slot post according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

An offshore wind turbine installation platform 1000 according to an embodiment of the invention is described below with reference to the drawings. As shown in fig. 1 to 6, an offshore wind turbine installation platform 1000 according to an embodiment of the present invention includes a platform 100, a platform beam 110, a plurality of mounting platforms 200, and a cabinet 400.

The platform beam 110 is provided on the platform 100. A plurality of mounting platforms 200 are spaced apart from each other on the platform beam 110, and each mounting platform 200 is provided with a slot 210 that opens upward. The slot 210 includes a sinking fixation section 220 and a sliding section 230 connected together, and a bottom surface 224 of the sinking fixation section 220 is located below a bottom surface 224 of the sliding section 230.

The cabinet 400 includes a body 401 and a plurality of slot posts 410 disposed at the bottom of the body 401, the slot posts 410 are matched with the slots 210 of the mounting platforms 200 in a one-to-one correspondence manner, and each slot post 410 slides into the sinking fixing section 220 through the sliding section 230. The one-to-one correspondence of the slot columns 410 to the slots 210 of the mounting tables 200 means that: the position of the plurality of slot posts 410 at the bottom of the body 401 matches the position of the plurality of mounting platforms 200 on the platform beam 110 so that the plurality of slot posts 410 can simultaneously enter the slots 210 of their corresponding mounting platforms 200.

According to the offshore wind turbine equipment platform 1000 of the embodiment of the invention, the plurality of mounting platforms 200 and the plurality of slot columns 410 which are matched with the slots 210 of the plurality of mounting platforms 200 in a one-to-one correspondence manner are arranged, so that the slot columns 410 can conveniently enter the slots 210 of the mounting platforms 200. Specifically, the card slot 210 includes a sinking fixation section 220 and a sliding section 230 connected, and a bottom surface 224 of the sinking fixation section 220 is located below the bottom surface 224 of the sliding section 230. Therefore, it is difficult for the slot posts 410 in the sunken fixing section 220 to be withdrawn into the sliding section 230 so as to fix the slot posts 410 in the sunken fixing section 220. The width of the sliding section 230 may be much larger than the diameter of the slot post 410, so that there is a larger fit clearance between the sliding section 230 and the slot post 410, thereby allowing a higher tolerance for the slot post 410 to slide into the sliding section 230. That is, the slot legs 410 are more easily inserted into the sliding section 230, so that the slot legs 410 are inserted into the sinking fixation section 220 from the sliding section 230. It is difficult for the snap groove column 410 entered into the sunken securing section 220 to retreat into the sliding section 230 so that the snap groove column 410 can maintain a fixed state in the sunken securing section 220. A plurality of mounting platforms 200 are spaced apart on the platform beam 110, and a plurality of slot columns 410 are provided at the bottom of the body 401 of the cabinet 400. Thus, the plurality of mounting platforms 200 in cooperation with the plurality of slot legs 410 facilitates the mounting of the cabinet 400 on the platform beam 110. Because the cabinet body 400 has certain quality, and the sinking fixed section 220 has certain degree of depth for the cabinet body 400 can press the draw-in groove post 410 to the sinking fixed section 220, thereby makes the draw-in groove post 410 in the sinking fixed section 220 difficult to remove, and the cabinet body 400 is difficult to remove promptly, guarantees the stability of the cabinet body 400.

Therefore, the offshore wind turbine installation platform 1000 according to the embodiment of the present invention has advantages of convenience in mounting the cabinet 400 to the platform beam 110 and high mounting stability.

As shown in fig. 1 to 6, an offshore wind turbine installation platform 1000 according to an embodiment of the present invention includes a platform 100, a platform beam 110, a plurality of mounting platforms 200, and a cabinet 400.

The platform beam 110 is provided on the platform 100. For example, a plurality of platform beams 110 are alternately arranged on the platform, so that the cabinet 400 can be installed on the platform beams 110, and the pressure of the platform 100 on the cabinet 400 is dispersed to the platform beams 110, i.e. the stress of the platform 100 is more uniform. Platform 100 includes outer and inner tower platforms and outer and inner foundation platforms. The cabinet 400 includes a cabinet including electric, survival, diesel generating cabinets, beacon lights, etc. to be placed on the platform 100.

A plurality of mounting platforms 200 are spaced apart from each other on the platform beam 110, and each mounting platform 200 is provided with a slot 210 that opens upward. For example, one mounting platform 200 may be provided on the same platform beam 110 at one to two meter intervals.

The slot 210 includes a sinking fixation section 220 and a sliding section 230 connected together, and a bottom surface 224 of the sinking fixation section 220 is located below a bottom surface 224 of the sliding section 230. For example, the depth of the sunken securing section 220 of the card slot 210 is greater than the depth of the sliding section 230 of the card slot 210. The groove depth of the sliding section 230 is 20mm, the groove depth of the sinking fixing section 220 is 30mm, and the groove width of the sinking fixing section 220 is 50 mm.

The cabinet 400 includes a body 401 and a plurality of card slot posts 410 disposed at the bottom of the body 401. For example, the diameter of the slot column 410 is 49.5mm, the width of at least a portion of the sliding section 230 is much greater than 50mm, and the width of at least a portion of the sliding section 230 may be 80 mm. So that there is a certain fit clearance between the slot legs 410 and the sliding section 230, and the slot legs 410 slide into the sinking fixation section 220 with a higher tolerance. The plurality of slot posts 410 are fitted with the slots 210 of the plurality of mounting tables 200 in a one-to-one correspondence, and each slot post 410 is slid into the sinking fixation section 220 through the sliding section 230. For example, four mounting platforms 200 are disposed on the platform beam 110, and four slot columns 410 corresponding to the four mounting platforms 200 one to one are disposed at the bottom of the body 401 of the cabinet 400, so that the four slot columns 410 slide into the four sunken fixing sections 220 through the sliding sections 230, so that the cabinet 400 is mounted on the platform beam 110.

As shown in fig. 3, in some embodiments, the sliding section 230 includes a first sliding section 231 and a second sliding section 232 that are connected to each other. The first sliding section 231 and the second sliding section 232 are straight sections, the second sliding section 232 is connected with the sinking fixing section 220, and the extending direction of the first sliding section 231 is intersected with the extending direction of the second sliding section 232, so that the slot clamping column 410 below the cabinet body 400 is not easy to directly slide out of the mounting table 200 from the sliding section 230. For example, the first sliding section 231 extends substantially in the left-right direction, the second sliding section 232 extends in the front-rear direction, the left end of the first sliding section 231 is connected to the rear end of the second sliding section 232, and the front end of the second sliding section 232 is connected to the sinking fixation section 220. The front-back direction is shown by arrow B in fig. 4, and the left-right direction is shown by arrow C in fig. 4.

The sinking-fixing section 220 includes a first sidewall 221, a second sidewall 222, and a third sidewall 223, the first sidewall 221 is disposed opposite to the second sidewall 222, and the second sidewall 222 is disposed opposite to the sliding section 230. Specifically, the second sidewall surface 222 is disposed opposite to the second sliding section 232. The bottom surface 224 of the sinking fixation section 220 is a plane, and a certain height difference exists between the bottom surface 224 of the sinking fixation section 220 and the bottom surface of the sliding section 230, so that the slot clamping column 410 in the sinking fixation section 220 is difficult to enter the sliding section 230.

Optionally, the second sidewall 222 is a flat surface or an inwardly concave arc surface.

In some embodiments, the sliding section 230 of the card slot 200 is an arcuate slot or a straight slot.

As shown in fig. 4, in some embodiments, a portion of the bottom surface 224 of the sunken fixation section 220 is beveled. The upper end of the ramp surface is connected to the bottom surface 224 of the sliding section 230 so that the snap groove column 410 facilitates sliding from the sliding section 230 into the sunken securing section 220.

As shown in fig. 4 and 6, in some embodiments, the first, second, and third side wall surfaces 221, 222, and 223 are provided with first ribs 240 extending in a horizontal direction. The first groove 411 is horizontally formed in the groove column 410, and the first groove 411 is engaged with the first protrusion 240. After the slot column 410 enters the sinking fixing section 220, the first protruding ribs 240 on the first side wall surface 221, the second side wall surface 222 and the third side wall surface 223 can be engaged with the first groove 411, so that the first groove 411 can limit the slot column 410 in the up-down direction, and the stability of the slot column 410 is improved. The up-down direction is shown by arrow a in fig. 4.

As shown in fig. 5 and 6, the bottom surface 224 of the sunken securing section 220 is sloped. The upper end of the inclined plane is connected with the bottom surface 224 of the sliding section 230, the bottom surface 224 of the slot pillar 410 is an inclined plane, and the bottom surface 224 of the slot pillar 410 is matched with the bottom surface 224 of the sinking fixing section 220. Thereby allowing the slot legs 410 to slide from the sliding section 230 into the sunken securing section 220 and also allowing the cabinet 400 to remain stable and not to be tilted on the platform beam 110.

As shown in fig. 5 and 6, the second side wall 222 is provided with a first rib 240 extending in the horizontal direction, and the slot pillar 410 is provided with a first groove 411 having a ring shape in the horizontal direction, and the first groove 411 is matched with the first rib 240. After the slot column 410 enters the sinking fixing section 220, the first protruding rib 240 on the second side wall 222 can be engaged with the first groove 411, so that the first groove 411 can limit the slot column 410 in the vertical direction, and the stability of the slot column 410 is improved.

In some embodiments, the card slot 210 includes a card slot entrance 235, the card slot entrance 235 being located at an end of the first sliding section 231, the width of the first sliding section 231 increasing in a direction adjacent to the card slot entrance 235. Thereby making it easier for the slotted post 410 to enter the first slider section 231, thereby facilitating the mounting of the cabinet 400 to the platform beam 110.

In some embodiments, the slot pillar 410 is provided with a second rib 241 extending in an up-and-down direction, the second rib 241 is located below the first groove 411, the side wall surface of the sinking fixing section 220 is provided with a second groove extending in the up-and-down direction, and the second rib 241 is matched with the second groove. For example, the first sidewall 221 or the third sidewall 223 of the sinking fixation section 220 is provided with a second groove, and the second protrusion 241 is matched with the second groove on the first sidewall 221 or the third sidewall 223, so that the slot column 410 is not easy to move from the sinking fixation section 220 to the sliding section 230.

The invention further provides an offshore wind turbine, and the offshore wind turbine according to the embodiment of the invention comprises the offshore wind turbine equipment platform 1000 according to the embodiment of the invention. For example, an offshore wind turbine comprises an offshore wind turbine support structure comprising an offshore wind turbine arrangement platform 1000 according to an embodiment of the invention, and a wind turbine.

The invention also provides an installation method of the offshore wind turbine equipment platform 1000, which comprises the following steps:

A) a platform beam 110 is provided on the platform 100, and a plurality of mounting stages 200 are provided on the platform beam 110.

B) A plurality of slot posts 410 are installed on the bottom surface 224 of the body 401 of the cabinet 400, and the slot posts 410 are matched with the slots 210 of the installation tables 200 in a one-to-one correspondence manner, so that the slot posts 410 can enter the sinking fixation section 220 at the same time.

C) The cabinet 400 is moved such that the slot legs 410 under the cabinet 400 enter the slide section 230 of the slot 210 from the slot entrance 235.

D) The cabinet 400 is slid so that the slot posts 410 slide from the sliding section 230 into the sunken securing section 220.

According to the installation method of the offshore wind turbine equipment platform 1000, the installation platforms 200 and the slot columns 410 which are matched with the slots 210 of the installation platforms 200 in a one-to-one correspondence mode are arranged, so that the slot columns 410 can conveniently enter the slots 210 of the installation platforms 200. Specifically, the card slot 210 includes a sinking fixation section 220 and a sliding section 230 connected, and a bottom surface 224 of the sinking fixation section 220 is located below the bottom surface 224 of the sliding section 230. Therefore, it is difficult for the slot columns 410 in the sunken fixing section 220 to be withdrawn into the sliding section 230. The width of the sliding section 230 may be much larger than the diameter of the slot post 410, so that there is a larger fit clearance between the sliding section 230 and the slot post 410, thereby allowing a higher tolerance for the slot post 410 to slide into the sliding section 230. It is convenient for the slot column 410 to enter into the sliding section 230, so that the slot column 410 enters into the sinking fixation section 220 from the sliding section 230. It is difficult for the snap groove column 410 entered into the sunken securing section 220 to retreat into the sliding section 230 so that the snap groove column 410 can maintain a fixed state in the sunken securing section 220. A plurality of mounting platforms 200 are spaced apart on the platform beam 110, and a plurality of slot columns 410 are provided at the bottom of the body 401 of the cabinet 400. Thus, the plurality of mounting platforms 200 in cooperation with the plurality of slot legs 410 facilitates the mounting of the cabinet 400 on the platform beam 110. Because the cabinet body 400 has certain quality, and the sinking fixed section 220 has certain degree of depth for the cabinet body 400 can press the draw-in groove post 410 to the sinking fixed section 220, thereby makes the draw-in groove post 410 in the sinking fixed section 220 difficult to remove, and the cabinet body 400 is difficult to remove promptly, guarantees the stability of the cabinet body 400.

Therefore, the installation method of the offshore wind turbine installation platform 1000 according to the embodiment of the present invention has an advantage of facilitating the handling of the cabinet 400 to the platform beam 110.

In some embodiments, the portion of the slot post 410 adjacent to the sliding section 230 is welded to the wall of the slot 210 to weld the cabinet 400 to the mounting table 200. A larger welding space is formed between the portion of the slot post 410 adjacent to the sliding section 230 and the slot 210, thereby facilitating welding of the slot post 410 to the slot 210, and further stabilizing the cabinet 400 on the mounting table 200.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.