CN106760830A - Conical Steel Coal Hopper Assembling Construction Method for Super Large Cluster Polygonal Coal Bunker Group - Google Patents
Conical Steel Coal Hopper Assembling Construction Method for Super Large Cluster Polygonal Coal Bunker Group Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 140
- 239000010959 steel Substances 0.000 title claims abstract description 140
- 239000003245 coal Substances 0.000 title claims abstract description 97
- 238000010276 construction Methods 0.000 title claims abstract description 40
- 238000003466 welding Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 11
- 241000273930 Brevoortia tyrannus Species 0.000 claims description 9
- 238000003032 molecular docking Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 abstract 2
- 238000000465 moulding Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
- E04H7/22—Containers for fluent solids, e.g. silos, bunkers; Supports therefor
- E04H7/24—Constructions, with or without perforated walls, depending on the use of specified materials
- E04H7/30—Constructions, with or without perforated walls, depending on the use of specified materials mainly of metal
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Abstract
Description
技术领域technical field
本发明涉及一种超大型集束多边形煤仓群圆锥体钢煤斗拼装施工方法。The invention relates to a construction method for assembling conical steel coal buckets of a group of ultra-large clustered polygonal coal bunkers.
背景技术Background technique
超大型集束多边形煤仓群为蜂窝型煤仓，采用钢筋混凝土框架结构，长210.35m，宽60.45m，高45m，仓体由若干个六边形煤仓组成，每个蜂窝仓在20.6m以上为仓体直墙结构，20.6m以下为钢煤斗结构。钢煤斗为圆锥形结构，高16.1m，上口直径14.8m，下口直径2.86m，属超大型煤斗。The ultra-large clustered polygonal coal bunker group is a honeycomb coal bunker, which adopts a reinforced concrete frame structure, with a length of 210.35m, a width of 60.45m, and a height of 45m. It is a straight wall structure of the warehouse body, and a steel coal hopper structure below 20.6m. The steel coal scuttle is a conical structure with a height of 16.1m, an upper diameter of 14.8m and a lower diameter of 2.86m, which is a super large coal scuttle.
目前，对于钢煤斗的安装通常是采用在内外围搭设脚手架的方式进行安装，这种施工方法施工进度慢，费用高，安全质量得不到保障，且在施工过程中难以消除各节钢煤斗间的焊接应力，施工质量难以保证，因此采用传统的搭设脚手架安装钢煤斗的方法很难达到大型钢煤斗的施工要求，并会对工期造成影响。At present, the installation of steel coal buckets is usually carried out by erecting scaffolding on the inner periphery. This construction method is slow in construction progress, high in cost, and cannot guarantee safety and quality. Due to the welding stress between buckets, it is difficult to guarantee the construction quality. Therefore, it is difficult to meet the construction requirements of large steel coal buckets by using the traditional method of erecting scaffolding to install steel coal buckets, and it will affect the construction period.
发明内容Contents of the invention
针对现有技术中存在的上述缺陷，本发明提供了一种能够在拼装过程中消除各节钢煤斗间的焊接应力，提高钢煤斗拼装质量，并且能够实现高效率低成本拼装的超大型集束多边形煤仓群圆锥体钢煤斗拼装施工方法。Aiming at the above-mentioned defects in the prior art, the present invention provides a super-large steel coal hopper that can eliminate the welding stress between the steel coal hopper sections during the assembly process, improve the assembly quality of the steel coal hopper, and realize high-efficiency and low-cost assembly. A construction method for assembling conical steel coal hoppers of a group of polygonal coal bunkers.
本发明是通过如下技术方案来实现的：一种超大型集束多边形煤仓群圆锥体钢煤斗拼装施工方法，其特征是：利用自由升降平台和电动葫芦进行拼装施工，所述自由升降平台包括圆形的桁架结构、铺设在所述桁架结构上的钢板以及连接在所述桁架结构边缘的吊耳，所述桁架结构包括穿过桁架结构中心设置的多个钢管结构，所述钢管结构在桁架结构的中心固连在一起，每相邻两个所述钢管结构之间设有连接两个所述钢管结构端点的工字钢A以及与所述工字钢A平行并与该相邻的两个所述钢管结构连接的工字钢B，每个所述钢管结构包括平行设置的上弦杆和下弦杆及连接在所述上弦杆和所述下弦杆之间的腹杆；具体拼装施工步骤如下：The present invention is realized through the following technical scheme: a construction method for assembling conical steel coal buckets of super-large clustered polygonal coal bunkers, which is characterized in that: the free lifting platform and electric hoist are used for assembling construction, and the free lifting platform includes A circular truss structure, steel plates laid on the truss structure and lifting lugs connected to the edge of the truss structure, the truss structure includes a plurality of steel pipe structures set through the center of the truss structure, and the steel pipe structure The centers of the structures are fixed together, and an I-beam A connecting the end points of the two steel pipe structures is provided between each adjacent two steel pipe structures, and an I-beam A parallel to the I-beam A and adjacent to the two steel pipe structures is arranged. The I-beam B connected by the steel pipe structure, each of the steel pipe structures includes an upper chord and a lower chord arranged in parallel and a web connected between the upper chord and the lower chord; the specific assembly construction steps are as follows :
(1)将钢煤斗沿其轴向分为若干节，根据每节钢煤斗的设计尺寸利用数控下料机将钢板切割成组成每节钢煤斗的相应的扇环，并利用卷板机将扇环卷制成型；(1) The steel coal scuttle is divided into several sections along its axial direction, and the steel plate is cut into corresponding fan rings forming each section of the steel coal scuttle by using a CNC blanking machine according to the design size of each steel coal scuttle, and coiled plates are used to The machine rolls the fan ring into shape;
(2)将首节钢煤斗在施工场地焊接成型，并在焊接成型后的该首节钢煤斗的外侧均匀布置六个吊环，采用500t汽车吊将该首节钢煤斗吊装就位，并在吊装就位后在每个吊环处安装电动葫芦；(2) Weld and form the first section of steel coal scuttle on the construction site, and evenly arrange six lifting rings on the outside of the welded and formed first section of steel coal scuttle, and use a 500t truck crane to hoist the first section of steel coal scuttle in place. And install the electric hoist at each lifting ring after hoisting in place;
(3)在地面上测量定位出每个钢煤斗的圆心，在现场拼装所述自由升降平台，并使自由升降平台的圆心与钢煤斗的圆心重合；(3) measure and locate the center of circle of each steel coal bucket on the ground, assemble the described free lifting platform on the spot, and make the circle center of the free lifting platform coincide with the circle center of the steel coal bucket;
(4)在自由升降平台上根据下一节待安装的钢煤斗的下口尺寸设置定位挡板，将组成该节钢煤斗的预制成型的扇环放置在自由升降平台上，并通过自由升降平台上的定位挡板使所有扇环组成该节钢煤斗的形状，然后组对焊接纵缝成型，随后进行内衬施工，最后将本节钢煤斗与上一节钢煤斗对接处所需零部件放置在自由升降平台上，将所述电动葫芦与自由升降平台的吊耳连接，通过电动葫芦将自由升降平台提升至对接位置，然后组对焊接环缝；(4) Set a positioning baffle on the free lifting platform according to the size of the lower opening of the steel coal scuttle to be installed in the next section, place the prefabricated fan ring forming the steel coal scuttle on the free lifting platform, and pass through the free The positioning baffle on the lifting platform makes all the fan rings form the shape of the steel coal hopper of this section, and then the welding longitudinal seam is formed, and then the lining construction is carried out, and finally the steel coal hopper of this section is connected with the steel coal hopper of the previous section The required parts are placed on the free lifting platform, the electric hoist is connected to the lifting lug of the free lifting platform, the free lifting platform is lifted to the docking position through the electric hoist, and then the welding ring seam is assembled;
(5)重复步骤(4)，采用倒装法顺次完成其余各节钢煤斗的拼装。(5) Step (4) is repeated, and the assembly of the remaining sections of steel coal buckets is completed sequentially by using the inversion method.
进一步的，为了保证焊接质量，在各节钢煤斗对接焊接时通过电动葫芦控制自由升降平台来消除焊接应力。Further, in order to ensure the welding quality, the electric hoist is used to control the free lifting platform to eliminate the welding stress during the butt welding of each steel coal hopper.
为便于对自由升降平台的控制，每个电动葫芦有单独的控制电源及开关。通过单独控制的电动葫芦可以实现对自由升降平台的自由控制。例如：通过各单独控制的电动葫芦对升降平台进行自动调心。In order to facilitate the control of the free lifting platform, each electric hoist has a separate control power supply and switch. The free control of the free lifting platform can be realized through the individually controlled electric hoist. For example: automatic centering of the lifting platform through each individually controlled electric hoist.
为保证施工质量，自由升降平台的提升及下落速度不大于1m/min。In order to ensure the construction quality, the lifting and falling speed of the free lifting platform shall not exceed 1m/min.
为了便于快速组装，自由升降平台的每个所述钢管结构分为中心部分和两端部分，所述中心部分与所述两端部分通过法兰连接，各个所述钢管结构的所述中心部分连接为整体。In order to facilitate quick assembly, each steel pipe structure of the free lifting platform is divided into a central part and two end parts, the central part is connected to the two end parts through flanges, and the central part of each steel pipe structure is connected for the whole.
本发明的有益效果是：本发明通过采用自由升降平台来实现各节钢煤斗的拼装，拼装过程中不需进行内外支架搭设和拆除，降低了施工危险系数及施工工作量，加快了施工进度，并降低了施工成本，且施工过程中通过控制自由升降平台可以消除各节钢煤斗间的焊接应力，施工过程中不需要增加内部支撑以防止变形过大，能够大大提高施工质量。本发明中采用的自由升降平台采用桁架结构，整体结构强度高，使用可靠，完全可以满足大型钢煤斗的拼装需求。本发明的施工方法适应性强，应用范围广，尤其适应于大型圆锥体料仓拼装施工，节省了人力、物力等成本，保证了人员的安全，有效提高了高空作业的安全系数，对于我国大型钢结构料仓和类似的结构工程施工有着非常强的实用性和优越性。The beneficial effects of the present invention are: the present invention realizes the assembly of each section of steel coal scuttle by adopting a free lifting platform, and does not need to erect and dismantle internal and external supports during the assembly process, reduces the construction risk factor and construction workload, and speeds up the construction progress , and reduce the construction cost, and the welding stress between the steel coal hoppers of each section can be eliminated by controlling the free lifting platform during the construction process. During the construction process, there is no need to increase internal supports to prevent excessive deformation, which can greatly improve the construction quality. The free lifting platform adopted in the present invention adopts a truss structure, the overall structural strength is high, and the use is reliable, which can fully meet the assembly requirements of large steel coal buckets. The construction method of the present invention has strong adaptability and wide application range, and is especially suitable for the assembly and construction of large-scale conical silos, which saves manpower, material resources and other costs, ensures the safety of personnel, and effectively improves the safety factor of high-altitude operations. Steel structure silos and similar structural engineering constructions have very strong practicability and advantages.
附图说明Description of drawings
图1是本发明具体实施方式中的圆锥体钢煤斗的里面示意图；Fig. 1 is the inner schematic view of the conical steel coal scuttle in the specific embodiment of the present invention;
图2是本发明具体实施方式中自由升降平台的俯视结构示意图；Fig. 2 is a top view structural schematic diagram of the free lifting platform in a specific embodiment of the present invention;
图3是本发明具体实施方式中自由升降平台的吊耳的示意图；Fig. 3 is a schematic diagram of the lifting lug of the free lifting platform in a specific embodiment of the present invention;
图4是本发明具体实施方式中自由升降平台的钢管结构A的示意图；Fig. 4 is the schematic diagram of the steel pipe structure A of the free lifting platform in the specific embodiment of the present invention;
图5是图4的A-A向视图；Fig. 5 is the A-A direction view of Fig. 4;
图6是本发明具体实施方式中自由升降平台的第一种连接板的示意图；Fig. 6 is a schematic diagram of the first connecting plate of the free lifting platform in the specific embodiment of the present invention;
图7是本发明具体实施方式中自由升降平台的第二种连接板的示意图；Fig. 7 is a schematic diagram of the second connecting plate of the free lifting platform in the specific embodiment of the present invention;
图8是本发明具体实施方式中自由升降平台的加劲板的示意图；Fig. 8 is a schematic diagram of a stiffening plate of a free lifting platform in a specific embodiment of the present invention;
图9是本发明具体实施方式中在自由升降平台上拼装钢煤斗的示意图；Fig. 9 is a schematic diagram of assembling a steel coal bucket on a free lifting platform in a specific embodiment of the present invention;
图10是图9中的B-B示意图；Fig. 10 is a schematic diagram of B-B in Fig. 9;
图中，1、桁架结构，2、吊耳，3、钢管结构，31、钢管结构A，32、钢管结构B，33、钢管结构C，34、上弦杆，35、下弦杆，36、腹杆，37、中心部分，38、两端部分，4、工字钢A，41、工字钢A1，42、工字钢A2，43、工字钢A3，5、工字钢B，51、工字钢B1，52、工字钢B2，53、工字钢B3，6、连接板，7、加劲板，8、钢条，9、法兰，10、中心管，11、自由升降平台，12、定位挡板，13、钢煤斗。In the figure, 1. Truss structure, 2. Lifting lug, 3. Steel pipe structure, 31. Steel pipe structure A, 32. Steel pipe structure B, 33. Steel pipe structure C, 34. Upper chord, 35. Lower chord, 36. Web , 37, central part, 38, both ends, 4, I-beam A, 41, I-beam A 1 , 42, I-beam A 2 , 43, I-beam A 3 , 5, I-beam B, 51. I-beam B 1 , 52. I-beam B 2 , 53. I-beam B 3 , 6. Connecting plate, 7. Stiffener, 8. Steel bar, 9. Flange, 10. Center pipe, 11 , Free lifting platform, 12, positioning baffle, 13, steel coal bucket.
具体实施方式detailed description
下面通过非限定性的实施例并结合附图对本发明作进一步的说明：The present invention will be further described below in conjunction with accompanying drawing by non-limiting embodiment:
如附图所示，一种超大型集束多边形煤仓群圆锥体钢煤斗拼装施工方法，其利用自由升降平台11和电动葫芦进行拼装施工。其中，所述自由升降平台11包括圆形的桁架结构1、铺设在所述桁架结构1上的钢板(图中未示出)以及连接在所述桁架结构边缘的多个吊耳2，桁架结构1包括穿过桁架结构中心设置的多个钢管结构3，本发明实施例中设置了三个钢管结构3，三个钢管结构3均匀布置，分别为钢管结构A31、钢管结构B32和钢管结构C33，三个钢管结构3在桁架结构的中心固连在一起，每相邻两个所述钢管结构3之间设有连接两个所述钢管结构3端点的工字钢A4以及与所述工字钢A4平行并与该相邻的两个所述钢管结构3连接的工字钢B5，其中，位于钢管结构B32和钢管结构C33之间的为工字钢A141和工字钢B151，位于钢管结构A31和钢管结构B32之间的为工字钢A242和工字钢B252，位于钢管结构A31和钢管结构C33之间的为工字钢A343和工字钢B353，每个钢管结构3包括平行设置的上弦杆34和下弦杆35以及连接在位于上弦杆34及下弦杆35之间的若干个腹杆36。吊耳2设置在钢管结构3的端部。为方便平台的拼装，每个钢管结构3分为中心部分37和两端部分38，中心部分37与两端部分38通过法兰9连接，各个钢管结构3的中心部分37通过中间的中心管10焊接连接为整体，每个钢管结构3上设有多个连接板6，连接板6的形式包括如图5和图6所示的两种形式，工字钢B5通过连接板6与钢管结构固定连接，为增加桁架结构1的强度，中心部分37的中心位置的中心管10内设有加劲板7；为更好地支撑钢板，桁架结构与其上部的钢板之间均匀设置有若干与桁架结构连接在一起的钢条8，钢条8通过所述连接板6与钢管结构3固定连接。As shown in the accompanying drawings, a construction method for assembling a conical steel coal scuttle of super-large clustered polygonal coal bunkers, which utilizes a free lifting platform 11 and an electric hoist for assembling construction. Wherein, the free lifting platform 11 includes a circular truss structure 1, a steel plate (not shown) laid on the truss structure 1 and a plurality of lifting lugs 2 connected to the edge of the truss structure, the truss structure 1 includes a plurality of steel pipe structures 3 arranged through the center of the truss structure. In the embodiment of the present invention, three steel pipe structures 3 are arranged, and the three steel pipe structures 3 are evenly arranged, which are respectively steel pipe structure A31, steel pipe structure B32 and steel pipe structure C33, The three steel pipe structures 3 are fixedly connected together at the center of the truss structure, and the I-beam A4 connecting the ends of the two steel pipe structures 3 and the I-beam A4 are arranged between each adjacent two steel pipe structures 3 . A4 is parallel to the I-beam B5 connected to the two adjacent steel pipe structures 3, wherein the I-beam A 1 41 and the I-beam B 1 51 are located between the steel pipe structure B32 and the steel pipe structure C33, I-beam A 2 42 and I-beam B 2 52 are located between steel pipe structure A31 and steel pipe structure B32, and I-beam A 3 43 and I-beam B 3 are located between steel pipe structure A31 and steel pipe structure C33 53. Each steel pipe structure 3 includes an upper chord 34 and a lower chord 35 arranged in parallel, and several webs 36 connected between the upper chord 34 and the lower chord 35. The lifting lug 2 is arranged at the end of the steel pipe structure 3 . In order to facilitate the assembly of the platform, each steel pipe structure 3 is divided into a central part 37 and two end parts 38, the central part 37 and the two end parts 38 are connected by flanges 9, and the central part 37 of each steel pipe structure 3 passes through the middle center pipe 10 The welding connection is integral, and each steel pipe structure 3 is provided with a plurality of connecting plates 6. The forms of the connecting plates 6 include two forms as shown in Figure 5 and Figure 6, and the I-beam B5 is fixed to the steel pipe structure through the connecting plates 6 Connection, in order to increase the strength of the truss structure 1, a stiffening plate 7 is provided in the center tube 10 at the center of the central part 37; in order to better support the steel plate, several truss structure connections are evenly arranged between the truss structure and the upper steel plate. The steel bars 8 together are fixedly connected to the steel pipe structure 3 through the connecting plate 6 .
具体拼装施工步骤如下：The specific assembly construction steps are as follows:
(1)将钢煤斗沿其轴向分为若干节，根据每节钢煤斗的设计尺寸利用数控下料机将钢板切割成组成每节钢煤斗的相应的扇环，并利用卷板机将扇环卷制成型。下料时要进行尺寸控制：①控制切割枪头的角度；②增加切割缝宽余量0.5mm；③增加焊接收缩量1.0mm。卷板过程中，平均分段弧长，先计算出扇环的外弧长，然后沿外弧长划等分点，相邻等分点间的外弧长不大于1.1米，根据每个等分点，使用半径控制杆在板料上划径向线段，等分扇环。(1) The steel coal scuttle is divided into several sections along its axial direction, and the steel plate is cut into corresponding fan rings forming each section of the steel coal scuttle by using a CNC blanking machine according to the design size of each steel coal scuttle, and coiled plates are used to The machine rolls the fan ring into shape. Dimensional control is required when blanking: ①Control the angle of the cutting gun head; ②Increase the cutting seam width allowance by 0.5mm; ③Increase the welding shrinkage by 1.0mm. During the coiling process, the average segmented arc length is calculated first by the outer arc length of the fan ring, and then divided points are drawn along the outer arc length. The outer arc length between adjacent equal points is not greater than 1.1 meters. According to each equal Divide the point, use the radius control bar to draw a radial line segment on the sheet, and divide the fan ring equally.
(2)将首节钢煤斗在施工场地焊接成型，并在焊接成型后的该首节钢煤斗的外侧均匀焊接六个吊环，采用500t汽车吊将该首节钢煤斗吊装就位，并在吊装就位后在每个吊环处安装电动葫芦；其中，每个电动葫芦应有单独的控制电源及开关。(2) Weld and form the first section of steel coal scuttle on the construction site, and evenly weld six lifting rings on the outside of the welded first section of steel coal scuttle, use a 500t truck crane to hoist the first section of steel coal scuttle in place, And install the electric hoist at each lifting ring after hoisting in place; among them, each electric hoist should have a separate control power supply and switch.
(3)在地面上测量定位出每个钢煤斗的圆心，并设置用于定位圆心的控制点，在现场拼装出自由升降平台，并使自由升降平台的圆心与钢煤斗的圆心重合；(3) Measure and locate the center of circle of each steel coal bucket on the ground, and set control points for positioning the circle center, assemble a free lifting platform on the spot, and make the circle center of the free lifting platform coincide with the circle center of the steel coal bucket;
(4)在自由升降平台上根据下一节待安装的钢煤斗的下口尺寸在其外缘设置定位挡板12，定位挡板12用于保证保证钢煤斗线型尺寸，定位挡板12为厚度2cm*高度5cm*长度10cm的碳钢钢板，间距50cm，定位挡板误差≤3mm，将组成该节钢煤斗的预制成型的扇环放置在自由升降平台上，并通过自由升降平台上的定位挡板12使所有扇环组成该节钢煤斗的形状，然后组对焊接纵缝，成型该节钢煤斗，随后进行内衬施工，最后将本节钢煤斗与上一节钢煤斗对接处所需零部件放置在自由升降平台上，将电动葫芦与自由升降平台的吊耳连接，通过电动葫芦将自由升降平台提升至对接位置，然后组对焊接环缝；电动葫芦提升及下落速度不大于1m/min。在各节钢煤斗对接焊接时通过电动葫芦来控制自由升降平台来消除焊接应力。(4) On the free lifting platform, according to the size of the lower opening of the steel coal scuttle to be installed in the next section, a positioning baffle 12 is set on its outer edge. The positioning baffle 12 is used to ensure the line size of the steel coal scuttle, and the positioning baffle 12 is a carbon steel plate with a thickness of 2cm*height 5cm*length 10cm, with a spacing of 50cm and an error of positioning baffles ≤ 3mm. The positioning baffle plate 12 on the top makes all the fan rings form the shape of this section of steel coal scuttle, then group butt welding longitudinal seams to form this section of steel coal scuttle, and then carry out lining construction, and finally connect this section of steel coal scuttle with the previous section The parts required for the joint of the steel coal hopper are placed on the free lifting platform, and the electric hoist is connected to the lifting lug of the free lifting platform, and the free lifting platform is lifted to the docking position through the electric hoist, and then the welding ring seam is assembled; the electric hoist lifts And the falling speed is not more than 1m/min. During the butt welding of each steel coal bucket, the electric hoist is used to control the free lifting platform to eliminate the welding stress.
(5)重复步骤(4)，采用倒装法由上至下顺次完成其余各节钢煤斗的拼装。(5) Repeat step (4), and use the flip method to complete the assembly of the remaining sections of the steel coal bucket from top to bottom.
本发明通过控制自由升降平台消除焊接应力，能够快速准确安装各节钢煤斗，使得钢煤斗拼装错边量均控制在1mm以内，钢煤斗上下口内径偏差均小于5mm,满足规范要求(错边量≤t/10,煤斗上下口内径偏差≤D/500)，施工质量得到保证、节约成本。The invention eliminates the welding stress by controlling the free lifting platform, and can quickly and accurately install each section of the steel coal scuttle, so that the amount of misalignment of the assembled steel coal scuttle is controlled within 1 mm, and the deviation of the inner diameter of the upper and lower openings of the steel coal scuttle is less than 5 mm, which meets the specification requirements ( Misalignment ≤ t/10, inner diameter deviation ≤ D/500 of the upper and lower openings of the coal hopper), the construction quality is guaranteed and the cost is saved.
本实施例中的其他部分采用已知技术，在此不再赘述。Other parts in this embodiment adopt known technologies, which will not be repeated here.
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