WO2022047952A1 - 一种高适应性的光伏组件边框结构及其实现方法 - Google Patents

一种高适应性的光伏组件边框结构及其实现方法 Download PDF

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Publication number
WO2022047952A1
WO2022047952A1 PCT/CN2020/123916 CN2020123916W WO2022047952A1 WO 2022047952 A1 WO2022047952 A1 WO 2022047952A1 CN 2020123916 W CN2020123916 W CN 2020123916W WO 2022047952 A1 WO2022047952 A1 WO 2022047952A1
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photovoltaic module
column
frame structure
connection
block
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PCT/CN2020/123916
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English (en)
French (fr)
Inventor
楼曹鑫
何悦
汪婷婷
李淳慧
艾瑞阳
赵林
金莎莎
乔序
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横店集团东磁股份有限公司
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Application filed by 横店集团东磁股份有限公司 filed Critical 横店集团东磁股份有限公司
Priority to EP20952194.7A priority Critical patent/EP4213376A4/en
Publication of WO2022047952A1 publication Critical patent/WO2022047952A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S30/00—Structural details of PV modules other than those related to light conversion
    • H02S30/10—Frame structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/20—Peripheral frames for modules
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S25/63—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing modules or their peripheral frames to supporting elements
    • F24S25/634—Clamps; Clips
    • F24S25/636—Clamps; Clips clamping by screw-threaded elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/20—Supporting structures directly fixed to an immovable object
    • H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
    • H02S20/26—Building materials integrated with PV modules, e.g. façade elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the invention belongs to the technical field of photovoltaic module frames, and in particular relates to a highly adaptable photovoltaic module frame structure and a realization method thereof.
  • BIPV Building Integrated Photovoltaic
  • a frame needs to be used when installing a photovoltaic module.
  • the installation frame of a photovoltaic module in the prior art has some problems during use.
  • the photovoltaic module cannot be embedded in the building structure, but can only be covered on the surface of the structure.
  • the purpose of the present invention is to provide a frame structure of a photovoltaic module with high adaptability to solve the above-mentioned problems in the background art.
  • the invention provides a highly adaptable photovoltaic module frame structure, which has the following characteristics.
  • Another object of the present invention is to provide a method for realizing a frame structure of a photovoltaic module with high adaptability.
  • a highly adaptable photovoltaic module frame structure including a frame body, the frame body includes a column, the lower end of the column is provided with an insert block, and the upper side of the column is provided with a side of the insert block.
  • the card block is provided with a card slot below the card block, and a groove is arranged above the insert block.
  • the upright column is provided with a connection cavity for connection.
  • the insert block is provided with dense tooth grooves for increasing friction.
  • a support plate is provided on the other side of the lower end of the column.
  • the support plate is provided with a through hole passing through.
  • a reinforcing rib for increasing the strength is connected to the upright column.
  • the reinforcing rib is a straight line, an arc shape or a cross-shaped structure.
  • the lower side of the opening of the card slot is provided with an arc.
  • the implementation method of the highly adaptable photovoltaic module frame structure includes the following steps:
  • Insert blocks are used to be embedded in building structures such as greenhouses, carports or glass houses, or to place installation pressure blocks, and the grooves provide space for installation;
  • the tooth slot is used to increase the friction force between the nesting with the building structure or with the installation pressure block;
  • the reinforcing ribs are used to increase the mechanical strength of the frame body
  • the support plate is used to improve the support performance of the frame body
  • the card slot is used to hold the photovoltaic module.
  • the column is provided with a connection cavity for connection
  • the insert block is provided with dense tooth slots for increasing friction
  • the lower end of the column is provided with a connection cavity for connection.
  • the other side is provided with a support plate, the support plate is provided with a through hole, and the column is connected with a reinforcing rib for increasing the strength. radian.
  • the present invention realizes the installation in the building structure through the provided insert blocks and grooves;
  • the present invention is provided with a tooth slot on the insert block, which can increase the frictional force of the connection, thereby ensuring the stability of the connection;
  • the present invention can be embedded in the building structure by replacing the glass with photovoltaic modules, which can improve the aesthetics of the building structure and has good practicability;
  • the column of the present invention is provided with a connection cavity for connection, and the connection cavity is used for the corner connection between the two frame bodies, thereby enhancing the connection strength between the frame bodies;
  • the other side of the lower end of the column of the present invention is provided with a supporting plate, and the supporting plate is provided with a through hole, the supporting plate is used to improve the supporting performance of the frame body, and the provided through hole can be used as a grounding hole and other later settings and processing;
  • the column of the present invention is connected with a reinforcing rib for increasing the strength, and the reinforcing rib is used to increase the mechanical strength of the frame body.
  • 9-12 are schematic structural diagrams of other forms of the present invention, respectively.
  • a highly adaptable photovoltaic module frame structure including a frame body, the frame body is an integrated structure, the frame body includes a column 1, and one side of the lower end of the column 1 is provided with
  • a clamping block 3 is arranged on the side of the insertion block 2 above the column 1
  • a clamping slot 4 is arranged below the clamping block 3
  • a groove 5 is arranged above the insertion block 2 .
  • the insert block 2 is used to be embedded in a building structure such as a greenhouse, a carport or a glass house, or used to place the installation pressure block 11, and the groove 5 provides space for installation,
  • the lower side of the opening of the card slot 4 is provided with an arc.
  • the set radian can avoid the phenomenon that the photovoltaic assembly 9 is bent when the photovoltaic assembly 9 is bent under the condition of high load.
  • Embodiment 1 The difference between this embodiment and Embodiment 1 is that: further, the column 1 is provided with a connection cavity 6 for connection.
  • connection cavity 6 is used for the corner connection between the two frame bodies, thereby enhancing the connection strength between the frame bodies.
  • the connecting cavity 6 can be arranged on one side of the groove 5 or above the groove 5 .
  • the insert block 2 is provided with dense tooth grooves 21 for increasing friction.
  • the tooth slot 21 is used to increase the friction force between the nesting with the building structure or with the installation pressure block 11 . It can be arranged on the lower surface of the insert block 2, or other corresponding positions.
  • a support plate 7 is provided on the other side of the lower end of the upright column 1 , and the support plate 7 is provided with a through hole therethrough.
  • the support plate 7 is used to improve the support performance of the frame body, and the provided through holes can be used as grounding holes for later setting and processing.
  • the upright column 1 is connected with a reinforcing rib 8 for increasing the strength, and the reinforcing rib 8 is a straight line, an arc or a cross-shaped structure.
  • the reinforcing rib 8 is used to increase the mechanical strength of the frame body. As shown in FIG. 1 , the reinforcing rib 8 may not be provided in an environment with low mechanical load requirements; as shown in FIG. 2 , the reinforcing rib 8 may be The reinforcing rib 8 is arranged above the groove 5, and the reinforcing rib 8 has an arc-shaped structure; as shown in FIG.
  • FIGS. 9-12 Please refer to FIGS. 9-12 .
  • the frame body can also be designed as shown in FIGS. 9-12 .
  • the difference between this embodiment and the first embodiment is that the length of the clamping block 3 is shorter than the length of the clamping block in the prior art.
  • the insertion depth of the card slot 4 and the photovoltaic module 9 can be reduced, so as to prevent the card slot 4 from being too deep to block the cells on the upper surface of the photovoltaic module 9 or the contact between the small metal frame and the cells, which may cause the cells to break.
  • the implementation method of the highly adaptable photovoltaic module frame structure according to the present invention includes the following steps:
  • the insert block 2 is used to be embedded in a building structure such as a greenhouse, a carport or a glass house, or used to place the installation pressure block 11, and the groove 5 provides space for installation;
  • the tooth slot 21 is used to increase the frictional force after nesting with the building structure or with the installation pressure block 11;
  • the reinforcing ribs 8 are used to increase the mechanical strength of the frame body
  • the support plate 7 is used to improve the support performance of the frame body
  • the card slot 4 is used to hold the photovoltaic module 9 .
  • the present invention is embedded in the building structure through the provided insert blocks 2 and grooves 5; Stability; the present invention can be embedded in the building structure through the photovoltaic module 9 instead of glass, which can improve the aesthetics of the building structure and has good practicability;
  • the column 1 of the present invention is provided with a connection cavity 6 for connection, and the connection cavity 6 It is used for the corner connection between the two frame bodies, thereby enhancing the connection strength between the frame bodies;
  • the other side of the lower end of the upright column 1 of the present invention is provided with a support plate 7, and the support plate 7 is provided with a through hole, supporting The plate 7 is used to improve the support performance of the frame body, and the provided through holes can be used as grounding holes for later setting and processing;
  • the column 1 of the present invention is connected with a reinforcing rib 8 for increasing the strength, and the reinforcing rib 8 is used to increase the mechanical strength of the frame body. strength.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Photovoltaic Devices (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

一种高适应性的光伏组件边框结构，包括边框本体，边框本体包括立柱(1)，立柱(1)的下端设有插块(2)，立柱(1)上方位于插块(2)的一侧设有卡块(3)，卡块(3)的下方设有卡槽(4)，插块(2)的上方设有凹槽(5)。通过设置的插块(2)和凹槽(5)，实现嵌入在建筑结构内安装；在插块(2)上设置了齿槽(21)，可以增加连接的摩擦力，从而确保连接的稳定性；通过光伏组件替代玻璃嵌入在建筑结构中，可以提高建筑结构的美观度，并且具有良好的实用性；立柱(1)上设有用于连接的连接腔(6)，用于两个边框本体之间的角码连接，从而增强边框本体之间的连接强度。还涉及一种高适应性的光伏组件边框结构的实现方法。

Description

一种高适应性的光伏组件边框结构及其实现方法 技术领域
本发明属于光伏组件边框技术领域，具体涉及一种高适应性的光伏组件边框结构及其实现方法。
背景技术
随着中国光伏行业不断蓬勃发展，晶体硅光伏组件发电效率由21世纪初的10％，提升到目前最高效率>25％，效率提升的同时，制造成本也在不断下降，目前晶硅光伏产品较十余年前下降超过90％。随着工艺技术提升与成本下降，终端应用市场也在蓬勃发展，光伏产品正在逐渐从工业设备转变为平民百姓认知的商品。而光伏建筑一体化(BIPV)是一种将太阳能发电(光伏)产品应用到建筑上的技术，充分利用建筑、车棚、温室大棚的空间结构，在常规遮阳、控温、避雨的基础上，增加发电功能。BIPV因此成为未来建筑及光伏技术市场的热点。
在光伏组件进行安装时需要使用到边框，现有技术中的光伏组件安装边框在使用过程中存在一些问题，例如，不能将光伏组件嵌入建筑体结构中，只能覆盖在结构表面。
发明内容
本发明的目的在于提供一种高适应性的光伏组件边框结构，以解决上述背景技术中提出的问题。本发明提供的一种高适应性的光伏组件边框结构，具有的特点。
本发明另一目的在于提供一种高适应性的光伏组件边框结构的实现方法。
为实现上述目的，本发明提供如下技术方案：一种高适应性的光伏组件边框结构，包括边框本体，边框本体包括立柱，立柱的下端设有插块，立柱上方位于插块的一侧设有卡块，卡块的下方设有卡槽，插块的上方设有凹槽。
在本发明中进一步地，立柱上设有用于连接的连接腔。
在本发明中进一步地，插块上设有密集的用于增加摩擦力的齿槽。
在本发明中进一步地，立柱下端的另一侧设有支撑板。
在本发明中进一步地，支撑板上设有贯穿的通孔。
在本发明中进一步地，立柱上连接有用于增加强度的加强筋。
在本发明中进一步地，加强筋为直线、弧形或交叉型结构。
在本发明中进一步地，卡槽开口的下侧设有弧度。
在本发明中进一步地，所述的高适应性的光伏组件边框结构的实现方法，包括以下步骤：
(一)、插块用于嵌入在温室、车棚或玻璃屋等建筑结构内，或者用于放置安装压块，凹槽为安装提供空间；
(二)、齿槽用于增加与建筑结构嵌套后或与安装压块之间的摩擦力；
(三)、加强筋用于增加边框本体的机械强度；
(四)、支撑板用于提高边框本体的支撑性能；
(五)、卡槽用于卡住光伏组件。
在本发明中进一步地，所述的高适应性的光伏组件边框结构的实现方法，立柱上设有用于连接的连接腔，插块上设有密集的用于增加摩擦力的齿槽，立柱下端的另一侧设有支撑板，支撑板上设有贯穿的通孔，立柱上连接有用于增加强度的加强筋，加强筋为直线、弧形或交叉型结构，卡槽开口的下侧设有弧度。
与现有技术相比，本发明的有益效果是：
1、本发明在适用行业普遍的组件安装结构的基础上，通过设置的插块和凹槽，实现嵌入在建筑结构内安装；
2、本发明在插块上设置了齿槽，可以增加连接的摩擦力，从而确保连接的稳定性；
3、本发明可以通过光伏组件替代玻璃嵌入在建筑结构中，可以提高建筑结构的美观度，以及具有良好的实用性；
4、本发明立柱上设有用于连接的连接腔，连接腔用于两个边框本体之间的角码连接，从而增强边框本体之间的连接强度；
5、本发明立柱下端的另一侧设有支撑板，支撑板上设有贯穿的通孔，支撑板用于提高边框本体的支撑性能，设置的通孔可以当做接地孔等后期设置与处理；
6、本发明立柱上连接有用于增加强度的加强筋，加强筋用于增加边框本体的机械强度。
附图说明
图1-3均为本发明的结构示意图；
图4-8均为本发明的安装结构示意图；
图9-12分别为本发明其他形态的结构示意图。
图中：1、立柱；2、插块；21、齿槽；3、卡块；4、卡槽；5、凹槽；6、连接腔；7、支撑板；8、加强筋；9、光伏组件；10、安装导轨；11、安装压块。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1
请参阅图1-7，本发明提供以下技术方案：一种高适应性的光伏组件边框结构，包括边框本体，边框本体为一体式结构，边框本体包括立柱1，立柱1下端的一侧设有插块2，立柱1上方位于插块2的一侧设有卡块3，卡块3的 下方设有卡槽4，插块2的上方设有凹槽5。
通过采用上述技术方案，插块2用于嵌入在温室、车棚或玻璃屋等建筑结构内，或者用于放置安装压块11，凹槽5为安装提供空间，
进一步地，卡槽4开口的下侧设有弧度。
通过采用上述技术方案，设置的弧度可以在光伏组件9在高载荷的条件下弯曲时，避免导致光伏组件9弯折的现象。
实施例2
本实施例与实施例1不同之处在于：进一步地，立柱1上设有用于连接的连接腔6。
通过采用上述技术方案，连接腔6用于两个边框本体之间的角码连接，从而增强边框本体之间的连接强度。
如图2或3所示，连接腔6可以设置于凹槽5的一侧，也可以设置于凹槽5的上方。
实施例3
本实施例与实施例1不同之处在于：进一步地，插块2上设有密集的用于增加摩擦力的齿槽21。
通过采用上述技术方案，齿槽21用于增加与建筑结构嵌套后或与安装压块11之间的摩擦力，本实施例中齿槽21设置在插块2的上表面，齿槽21也可以设置在插块2的下表面，或者其他对应的位置。
实施例4
本实施例与实施例1不同之处在于：进一步地，立柱1下端的另一侧设有支撑板7，支撑板7上设有贯穿的通孔。
通过采用上述技术方案，支撑板7用于提高边框本体的支撑性能，设置的通孔可以当做接地孔等后期设置与处理。
实施例5
本实施例与实施例1不同之处在于：进一步地，立柱1上连接有用于增加强度的加强筋8，加强筋8为直线、弧形或交叉型结构。
通过采用上述技术方案，加强筋8用于增加边框本体的机械强度，如图1所示，对于机械载荷要求不高的环境中可以不设置加强筋8；如图2所示，加强筋8可以设置于凹槽5的上方，且加强筋8为弧形结构；如图3所示，加强筋8可以设置于立柱1远离凹槽5的一侧，且加强筋8为直线型结构。
实施例6
请参阅图9-12，本实施例与实施例1不同之处在于：边框本体也可以设计成如图9-12所示的结构。
实施例7
本实施例与实施例1不同之处在于：卡块3的长度相比于现有技术卡块的长度要短。
通过采用上述技术方案，可以减少卡槽4与光伏组件9的插入深度，避免卡槽4太深遮挡光伏组件9上表面的电池片或者小面金属边框与电池片接触引起电池片碎裂。
实施例8
请参阅图12，本实施例与实施例1不同之处在于：立柱1下端的两侧均设有插块2。
通过采用上述技术方案，增加边框本体的适用范围。
进一步地，本发明所述的高适应性的光伏组件边框结构的实现方法，包括以下步骤：
(一)、插块2用于嵌入在温室、车棚或玻璃屋等建筑结构内，或者用于放置安装压块11，凹槽5为安装提供空间；
(二)、齿槽21用于增加与建筑结构嵌套后或与安装压块11之间的摩擦力；
(三)、加强筋8用于增加边框本体的机械强度；
(四)、支撑板7用于提高边框本体的支撑性能；
(五)、卡槽4用于卡住光伏组件9。
综上所述，本发明通过设置的插块2和凹槽5，实现嵌入在建筑结构内安装；本发明在插块2上设置了齿槽21，可以增加连接的摩擦力，从而确保连接的稳定性；本发明可以通过光伏组件9替代玻璃嵌入在建筑结构中，可以提高建筑结构的美观度，以及具有良好的实用性；本发明立柱1上设有用于连接的连接腔6，连接腔6用于两个边框本体之间的角码连接，从而增强边框本体之间的连接强度；本发明立柱1下端的另一侧设有支撑板7，支撑板7上设有贯穿的通孔，支撑板7用于提高边框本体的支撑性能，设置的通孔可以当做接地孔等后期设置与处理；本发明立柱1上连接有用于增加强度的加强筋8，加强筋8用于增加边框本体的机械强度。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (10)

  1. 一种高适应性的光伏组件边框结构，包括边框本体，其特征在于：边框本体包括立柱(1)，立柱(1)的下端设有插块(2)，立柱(1)上方位于插块(2)的一侧设有卡块(3)，卡块(3)的下方设有卡槽(4)，插块(2)的上方设有凹槽(5)。
  2. 根据权利要求1所述的一种高适应性的光伏组件边框结构，其特征在于：立柱(1)上设有用于连接的连接腔(6)。
  3. 根据权利要求1所述的一种高适应性的光伏组件边框结构，其特征在于：插块(2)上设有密集的用于增加摩擦力的齿槽(21)。
  4. 根据权利要求1所述的一种高适应性的光伏组件边框结构，其特征在于：立柱(1)下端的另一侧设有支撑板(7)。
  5. 根据权利要求4所述的一种高适应性的光伏组件边框结构，其特征在于：支撑板(7)上设有贯穿的通孔。
  6. 根据权利要求1所述的一种高适应性的光伏组件边框结构，其特征在于：立柱(1)上连接有用于增加强度的加强筋(8)。
  7. 根据权利要求6所述的一种高适应性的光伏组件边框结构，其特征在于：加强筋(8)为直线、弧形或交叉型结构。
  8. 根据权利要求1所述的一种高适应性的光伏组件边框结构，其特征在于：卡槽(4)开口的下侧设有弧度。
  9. 根据权利要求1-8任一项所述的高适应性的光伏组件边框结构的实现方法，其特征在于，包括以下步骤：
    (一)、插块(2)用于嵌入在温室、车棚或玻璃屋等建筑结构内，或者用于放置安装压块，凹槽(5)为安装提供空间；
    (二)、齿槽(21)用于增加与建筑结构嵌套后或与安装压块之间的摩擦力；
    (三)、加强筋(8)用于增加边框本体的机械强度；
    (四)、支撑板(7)用于提高边框本体的支撑性能；
    (五)、卡槽(4)用于卡住光伏组件。
  10. 根据权利要求9所述的高适应性的光伏组件边框结构的实现方法，其特征在于：立柱(1)上设有用于连接的连接腔(6)，插块(2)上设有密集的用于增加摩擦力的齿槽(21)，立柱(1)下端的另一侧设有支撑板(7)，支撑板(7)上设有贯穿的通孔，立柱(1)上连接有用于增加强度的加强筋(8)，加强筋(8)为直线、弧形或交叉型结构，卡槽(4)开口的下侧设有弧度。
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