CN109839016B - 一种导流杆、套管及换流变系统 - Google Patents
一种导流杆、套管及换流变系统 Download PDFInfo
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- H01B17/54—Insulators or insulating bodies characterised by their form having heating or cooling devices
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- H—ELECTRICITY
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- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
- H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
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- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
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- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
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- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
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Abstract
本发明公开一种导流杆、套管及换流变系统,涉及电力设备技术领域,用于降低套管的制作难度,并改善套管的运行环境。所述导流杆包括设在导流杆杆部的水冷通道,以及分别设在导流杆端部的进水管和出水管;所述进水管和所述出水管分别与所述水冷通道连通;所述进水管和所述出水管可接入换流阀塔的水冷循环管路。本发明提供的导流杆、套管及换流变系统用于高压直流输电系统。
Description
技术领域
本发明涉及电力设备技术领域,尤其涉及一种导流杆、套管及换流变系统。
背景技术
在直流输电系统中,换流变压器位于交流电和直流电之间电能互换的核心位置,承担着换流变网侧交流系统与换流变阀侧换流阀塔之间电压电流传输的作用。换流变压器一般通过设在换流变阀侧的套管与换流阀塔中的换流阀组相连。
目前,干式胶浸纸套管作为高压套管领域的重要技术发展方向,其具有运行安全、不易爆裂等特点,上述套管多采用干式胶浸纸套管结构。干式胶浸纸套管利用胶浸纸作为散热绝缘介质,具有较为优良的机械性能和电气性能,但也因此需要执行非常复杂的制作工艺,比如注胶、压胶浸透、脱气及固化等工艺,使得干式胶浸纸套管的制作难度较大。并且,干式胶浸纸套管的制作难度容易随其体积或重量的增加而呈指数式增加,导致大体积或大重量的干式胶浸纸套管的成品率很低,比如管外径300㎜以上或胶浸重量1.5吨以上的干式胶浸纸套管。
然而,随着直流输电系统中输电电压电流等级的不断提高,为了有效保障设在换流变阀侧的套管的散热绝缘效果,该套管的管外径需达到300㎜、胶浸重量5吨及以上,导致其制作难度极大,成品率极低。
发明内容
本发明的目的在于提供一种导流杆、套管及换流变系统,用于降低套管的制作难度,并改善套管的运行环境。
为了实现上述目的,本发明提供如下技术方案:
一种导流杆,导流杆的杆部设有水冷通道,导流杆的端部设有进水管和出水管,进水管和出水管分别与水冷通道连通;进水管和出水管可接入换流阀塔的水冷循环管路。
与现有技术相比,本发明提供的导流杆具有如下有益效果:
本发明提供的导流杆,在导流杆的端部设置进水管和出水管,在导流杆的杆部设置水冷通道,进水管和出水管分别与水冷通道连通,这样当导流杆进行电压电流传输时,利用从进水管流入水冷通道内的冷却水,能够有效冷却导流杆,降低导流杆的运行温度,即减少导流杆表面因通过的大电流及谐波电流而集中的热量。
由于导流杆对电压电流的传输效果容易受其运行温度的影响,比如,导流杆可用于传输电压电流的有效截面积容易随导流杆运行温度的降低而增大;而且,将导流杆用于套管时,套管内胶浸纸芯体的体积也受导流杆表面集中热量的影响,比如,胶浸纸芯体的体积可随导流杆表面集中热量的减少而减小;因此,与现有技术相比,本发明提供的导流杆在传输相同等级的电压电流时,导流杆的径向尺寸可以适度减小,使得导流杆所在套管内胶浸纸芯体的体积也可以适度减小,从而能够减少导流杆所在套管内胶浸纸芯体的胶浸重量,以便降低套管的制作难度,提高套管的成品率。
此外,本发明提供的导流杆在进行电压电流传输时,利用进入其水冷通道内的冷却水对导流杆进行冷却,可降低导流杆的运行温度,改善导流杆及其所在套管的运行环境,降低套管的介质损耗,从而提高套管的运行可靠性。并且,在本发明提供的导流杆中,进水管和出水管可接入换流阀塔的水冷循环管路,这也就是说,导流杆的水冷通道可以与换流阀塔的水冷循环管路一体集成,从而方便统一管理冷却水的流动循环,对导流杆和换流阀塔所在换流变系统的水冷进行统一控制。
基于上述导流杆的技术方案,本发明还提供了一种套管,所述套管包括如上述技术方案所述的导流杆;导流杆上套设有绝缘壳体,导流杆与绝缘壳体之间夹设有胶浸纸芯体或油纸芯体。与现有技术相比,本发明提供的套管所能实现的有益效果,与上述技术方案提供的导流杆所能达到的有益效果相同,在此不做赘述。
基于上述套管的技术方案,本发明还提供了一种换流变系统,所述换流变系统包括换流阀塔,换流阀塔中的换流阀组通过如上述技术方案所述的套管与换流变压器相连。换流阀塔上设有水冷循环管路,套管中导流杆的水冷通道通过进水管和出水管接入水冷循环管路中。与现有技术相比,本发明提供的换流变系统所能实现的有益效果,与上述技术方案提供的套管所能达到的有益效果相同,在此不做赘述。
附图说明
此处所说明的附图用来提供对本发明的进一步理解,构成本发明的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1为本发明实施例提供的导流杆的结构示意图一;
图2为本发明实施例提供的导流杆的结构示意图二;
图3为本发明实施例提供的导流杆的结构示意图三;
图4为本发明实施例提供的导流杆的结构示意图四;
图5为图4所示导流杆的A-A剖视示意图;
图6为图5所示导流杆的B-B剖视示意图;
图7为本发明实施例提供的套管的结构示意图;
图8为本发明实施例提供的换流变系统的结构示意图。
附图标记:
1-导流杆, 1a-杆部,
1b-端部, 11-进水管,
12-出水管, 13-水冷通道,
131-外环水冷通道, 132-内环水冷通道,
14-第一层管壁, 15-第二层管壁,
16-第三层管壁, 17-端盖,
18-导流件, 19-导流板,
2-胶浸纸芯体, 3-绝缘壳体,
4-换流变阀侧套管, 41-均压环,
42-均压管, 5-换流变压器,
51-阀侧套管升高座, 52-网侧套管,
53-交流电网, 6-换流阀塔,
60-阀厅, 61-换流阀组,
62-水冷循环管路。
具体实施方式
为便于理解,下面结合说明书附图,对本发明实施例提供的导流杆、套管及换流变系统进行详细描述。本发明实施例提供的导流杆用于套管,套管用于换流变压器和换流阀塔中换流阀组的连接,但并不限于此,该套管的结构还可以应用在油断路器套管和电站套管等电力设备上。
请参阅图1-图8,本发明实施例提供的导流杆1,在导流杆的杆部1a设置水冷通道13,在导流杆的端部1b设置进水管11和出水管12,进水管11和出水管12分别与水冷通道13连通;进水管11和出水管12可接入换流阀塔6的水冷循环管路62。
上述导流杆1作为电压电流的传输介质,通常采用铜或铝材料等导电材料制作形成。当上述导流杆1用于套管时,在导流杆1上套设绝缘壳体3,在导流杆1与绝缘壳体3之间夹设胶浸纸芯体2或油纸芯体。绝缘壳体3可为采用环氧树脂材料制作的环氧树脂壳体,或为采用陶瓷材料制作的瓷质壳体;当绝缘壳体3为环氧树脂壳体时,环氧树脂壳体上可套设硅橡胶伞裙,环氧树脂壳体可与硅橡胶伞裙一体成型;当绝缘壳体3为瓷质壳体时,瓷质壳体上可套设瓷质伞裙,瓷质壳体可与瓷质伞裙一体成型。
本发明实施例提供的导流杆1,在导流杆的端部1b设置进水管11和出水管12,在导流杆的杆部1a设置水冷通道13。该进水管11和出水管12的形状及其具体设置位置,均可按照实际需要自行设置,比如进水管11和出水管12采用圆形结构或弧形结构,进水管11和出水管12位于导流管1的同一端或两端等。该水冷通道13的形状和走向可匹配导流杆1的结构自行设置。进水管11和出水管12分别与水冷通道13连通,这样当导流杆1进行电压电流传输时,利用从进水管11流入水冷通道13内的冷却水,能够有效冷却导流杆1,降低导流杆1的运行温度,即减少导流杆1表面因通过的大电流及谐波电流而集中的热量。
由于导流杆1对电压电流的传输效果容易受其运行温度的影响,比如,导流杆1可用于传输电压电流的有效截面积容易随导流杆1运行温度的降低而增大;而且,将导流杆1用于套管时,套管内胶浸纸芯体2的体积也受导流杆1表面集中热量的影响,比如,胶浸纸芯体2的体积可随导流杆1表面集中热量的减少而减小;因此,与现有技术相比,本发明实施例提供的导流杆1在传输相同等级的电压电流时,导流杆1的径向尺寸可以适度减小,使得导流杆1所在套管内胶浸纸芯体2的体积也可以适度减小,从而能够减少导流杆1所在套管内胶浸纸芯体2的胶浸重量,以便降低套管的制作难度,提高套管的成品率。
此外,本发明实施例提供的导流杆1在进行电压电流传输时,利用进入其水冷通道13内的冷却水对导流杆1进行冷却,可降低导流杆1的运行温度,改善导流杆1及其所在套管的运行环境,降低套管的介质损耗,从而提高套管的运行可靠性。并且,在本发明实施例提供的导流杆1中,进水管11和出水管12可接入换流阀塔6的水冷循环管路62,这也就是说,导流杆1的水冷通道13可以与换流阀塔6的水冷循环管路62一体集成,从而方便统一管理冷却水的流动循环,对导流杆1和换流阀塔6所在换流变系统的水冷进行统一控制。
值得一提的是,上述水冷通道13的形状和走向,与导流杆1的结构相匹配。而导流杆1的杆部1a通常呈管状设置,水冷通道13可以设在导流杆杆部1a的管孔内,如图1和图2所示;或者设在导流杆杆部1a的管壁内,如图3和图5所示。
示例性的,请参阅图1和图2,在本实施例提供的导流杆中,水冷通道13设在导流杆杆部1a的管孔内,这也就说,导流杆杆部1a的管孔可以直接作为水冷通道13。进水管11和出水管12设在导流杆的同一端;为了确保冷却水的冷却效果,进水管11的水流出口和出水管12的水流入口应分别位于水冷通道13沿导流杆轴向的两端。具体实施时,进水管11采用长管且沿导流杆的轴向伸入水冷通道13,进水管11的水流出口靠近导流杆未设进水管11或出水管12的一端;出水管12采用短管,出水管12的水流入口位于导流杆安装出水管12的一端。
为了减小冷却水对导流杆的冲击压力,同时加强冷却水对导流杆的冷却效果,在上述水冷通道13内还可以设置紊流装置,紊流装置的结构可以根据实际需要自行设置,确保紊流装置的水流入口与进水管11的水流出口对接,紊流装置的水流出口与出水管12的水流入口对接即可。
示例性的,紊流装置采用如图1所示呈螺旋状设置的导流件18。导流件18采用绝缘材料比如环氧树脂制作形成;导流件18可以活动放置在水冷通道13内,即导流件18无需固定安装在水冷通道13内。当冷却水从进水管11进入水冷通道13后,冷却水可以在导流件18的导向作用下,沿导流件18的旋向平紊流动至出水管12的水流入口处。
当然,紊流装置的结构并不仅限于此,紊流装置还可以采用如图2所示的结构。请参阅图2,在水冷通道13的内壁上交错设置多层导流板19,由每相邻的两层导流板19依次在水冷通道13内分隔出连续且迂回曲折的冷却水导流通道。
需要说明的是,水冷通道13设在导流杆杆部1a的管壁内时,导流杆杆部1a的管壁中空设置,水冷通道13的形状及导向可以根据导流杆杆部1a的管壁结构进行限制。为了方便制作,本实施例提供了两种较为简单的实施方式,如下所述。
第一种,请参阅图3,导流杆杆部1a的管壁为双层中空管壁。该双层中空管壁包括沿导流杆径向依次套设的第一层管壁14和第二层管壁15,第一层管壁14和第二层管壁15之间设有上述水冷通道13;水冷通道13为截面呈环形的柱状通道。第一层管壁14和第二层管壁15的两端分别通过端盖17密封连接;进水管11和出水管12分别位于导流杆1的两端,具体表现为进水管11和出水管12分别安装在不同的端盖17上。
第二种,请参阅图4-图6,导流杆杆部1a的管壁为三层中空管壁,该三层中空管壁包括沿导流杆1径向依次套设的第一层管壁14、第二层管壁15及第三层管壁16。第一层管壁14、第二层管壁15及第三层管壁16的两端分别通过对应的端盖17密封连接。进水管11和出水管12位于导流杆1的同一端,具体表现为进水管11和出水管12安装在同一个端盖17上。第二层管壁15远离进水管11或出水管12的一端设有格栅或导流孔。水冷通道13包括设在第三层管壁16与第二层管壁15之间、且与进水管11连通的外环水冷通道131,以及设在第二层管壁15与第一层管壁14之间、且与出水管12连通的内环水冷通道132,外环水冷通道131和内环水冷通道132均为截面呈环形的柱状通道;外环水冷通道131通过格栅或导流孔与内环水冷通道132连通,冷却水从进水管1进入外环水冷通道131后,可以通过设在第二层管壁15上的格栅或导流孔流入内环水冷通道132中,再从出水管13流出。
当然,导流杆杆部1a的管壁的中空结构并不仅限于上述这两种,其他采用类似方式或不同方式形成的中空结构均可以采用。本发明实施例提供的导流杆,采用沿导流杆1径向逐一套设的多层管壁,构成导流杆杆部1a的中空管壁,并利用每相邻两层管壁之间的空置间隔依次连通形成上述水冷通道13,能够对导流杆1进行均匀冷却,避免出现导流杆1局部过热的状况,从而进一步改善换流变阀侧套管的运行环境。
此外,在使用本实施例提供的导流杆传输电压电流时,因大电流或谐波电流产生的热量容易集中在导流杆1的外表面,因此,在采用上述第二种中空管壁结构的导流杆中,进水管11与外环水冷通道131连通,出水管12与内环水冷通道132连通,能够更好的冷却导流杆1。
值得一提的是,上述实施例中提到的冷却水通常为高纯度水。为了确保冷却水对导流杆的冷却效率,在上述实施例的基础上,可选的,在进水管11上设置液体泵,利用液体泵增加进入水冷通道13内冷却水的压力,能够加快冷却水在水冷通道13内的输送流动,从而确保冷却水对导流杆的冷却效率。此外,可选的,本实施例在进水管11上设置流量控制器,在出水管12上设置温度检测仪,还可以利用流量控制器对冷却水的流量和流速进行即时控制,以满足导流杆1在不同温度时的冷却需求。需要补充的是,流量控制器可采用流量控制阀或节流阀等。
为了实现自动化控制,在上述实施例的基础上,可选的,在导流杆的外部设置自动控制单元,将自动控制单元的输入端与上述温度检测仪信号连接,以通过温度检测仪获取出水管12处冷却水的温度;将自动控制单元的输出端分别与上述液体泵和上述流量控制器信号连接,以根据其所获取的出水管12处冷却水的温度,对液体泵和流量控制器的工作状态进行自动控制,进而对冷却水的流量和流速进行自动控制。
本发明实施例还提供了一种套管,请参阅图7,所述套管包括上述实施例提供的导流杆1;导流杆1上套设有绝缘壳体3,导流杆1与绝缘壳体3之间夹设有胶浸纸芯体2或油纸芯体。本发明实施例提供的套管中的导流杆1与上述实施例中的导流杆1具有相同的优势,其所能实现的有益效果与上述实施例中导流杆所能达到的有益效果相同,在此不做赘述。
需要说明的是,上述胶浸纸芯体2通常包括有多层胶浸纸,多层胶浸纸在卷制后通过真空压力浸胶(Vacuumize Pressure Immerse,简称VPI)工艺处理成型。具体实施时,上述多层胶浸纸的卷制,一般是指将多层干燥的电缆纸在特定条件下卷绕成电缆纸套管芯体,然后将卷绕成型的电缆纸套管芯体装入浸胶模具中进行预热抽真空,以便为后续的真空压力浸胶做好准备。当采用VPI工艺对电缆纸套管芯体进行处理时,通常是将经过真空预处理的树脂混胶通过一定压力传递到浸胶模具中,并在加热和抽真空的条件下浸透电缆纸套管芯体;然后在一定的压力作用使得浸透树脂混胶的电缆纸套管芯体固化成型,形成上述胶浸纸芯体2。
需要补充的是,在上述制作胶浸纸芯体2的过程中,当树脂混胶注入浸胶模具后,在电缆纸套管芯体浸胶的同时,需要注意树脂混胶脱气的处理,以便将树脂混胶中的低分子物及酸酐中游离酸等通过均匀的真空脱气排除挥发,确保电缆纸套管芯体浸透,从而确保电缆纸套管芯体在固化时并无裂纹和气泡出现,有利于保障胶浸纸芯体2成品的机械性能和电气性能。油纸芯体的制作工艺与胶浸纸芯体相类似,不再详述。
与现有技术相比,本发明实施例提供的套管,利用进入导流杆1中水冷通道13内的冷却水对导流杆1进行有效冷却,能够在传输相同等级的电压电流时,通过减小导流杆1的外径,适度减小套管的总体积,包括减小胶浸纸芯体2的体积,这样当胶浸纸芯体2的体积较小时,胶浸纸芯体2的胶浸量也较少,可确保胶浸纸芯体2的制作难度相应降低。
本发明实施例还提供了一种换流变系统,所述换流变系统包括换流阀塔,换流阀塔中的换流阀组通过上述实施例提供的套管与换流变压器相连;换流阀塔上设有水冷循环管路,套管中导流杆的水冷通道通过进水管和出水管接入水冷循环管路中。本发明实施例提供的换流变系统中的套管与上述实施例中的套管具有相同的优势,其所能实现的有益效果与上述实施例中套管所能达到的有益效果相同,在此不做赘述。
示例性的,请参阅图5,上述实施例提供的用于连接换流变压器5与换流阀塔6的套管为换流变阀侧套管4。换流阀塔6安装在阀厅60内,一般采用悬吊式安装。换流阀塔6通常由多层换流阀组61串接构成;换流阀塔6的顶部和/或底部一般安装有防护屏蔽罩和避雷子串等安全防护类装置。换流变压器5的网侧一般通过网侧套管52与交流电网53相连,换流变压器5的阀侧一般设置有阀侧套管升高座51,换流变阀侧套管4安装在阀侧套管升高座51上。换流变阀侧套管4可通过均压管42与换流阀塔6中的换流阀组61连接,且换流变阀侧套管4与均压管42相连的一端通常套设有均压环41。换流阀塔6上通常设置有水冷循环管路62,换流变阀侧套管4内的水冷通道可通过进水管11和出水管12接入该水冷循环管路62中。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
Claims (6)
1.一种套管,其特征在于,包括导流杆,所述导流杆的杆部设有水冷通道,所述导流杆的端部设有进水管和出水管,所述进水管和所述出水管分别与所述水冷通道连通;所述进水管和所述出水管可接入换流阀塔的水冷循环管路;所述导流杆的杆部呈管状,所述杆部的管壁中空;所述水冷通道设在所述杆部的中空管壁内;所述水冷通道内设有紊流装置,所述紊流装置的水流入口与所述进水管的水流出口对接,所述紊流装置的水流出口与所述出水管的水流入口对接;所述进水管上设有液体泵及流量控制器;
其中,所述管壁为三层中空管壁,所述三层中空管壁包括沿导流杆径向依次套设的第一层管壁、第二层管壁及第三层管壁;所述进水管和所述出水管位于所述导流杆的同一端;所述第二层管壁远离所述进水管或所述出水管的一端设有格栅或导流孔;所述水冷通道包括设在所述第三层管壁与所述第二层管壁之间,且与所述进水管连通的外环水冷通道,以及设在所述第二层管壁与所述第一层管壁之间,且与所述出水管连通的内环水冷通道,所述外环水冷通道通过所述格栅或所述导流孔与所述内环水冷通道连通。
2.根据权利要求1所述的套管,其特征在于,所述紊流装置包括呈螺旋状设置的导流件;
所述进水管和所述出水管位于所述导流杆的同一端;所述进水管的水流出口和所述出水管的水流入口,分别位于所述水冷通道沿导流杆轴向的两端。
3.根据权利要求1所述的套管,其特征在于,所述出水管上设有温度检测仪。
4.根据权利要求3所述的套管,其特征在于,所述导流杆的外部设置有自动控制单元,所述自动控制单元的输出端分别与所述液体泵和所述流量控制器信号连接,以根据其所获取的出水管处冷却水的温度,对所述液体泵和所述流量控制器的工作状态进行自动控制。
5.根据权利要求1所述的套管,其特征在于,所述导流杆上套设有绝缘壳体,所述导流杆与所述绝缘壳体之间夹设有胶浸纸芯体或油纸芯体。
6.一种换流变系统,其特征在于,包括换流阀塔,所述换流阀塔中的换流阀组通过如权利要求1-5中任一项所述的套管与换流变压器相连;
所述换流阀塔上设有水冷循环管路,所述套管中导流杆的水冷通道通过所述进水管和所述出水管接入所述水冷循环管路中。
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US11573053B2 (en) * | 2019-08-13 | 2023-02-07 | General Electric Company | Cyclone cooler device |
CN111029891A (zh) * | 2020-01-10 | 2020-04-17 | 华东师范大学重庆研究院 | 一种激光增益光纤散热装置 |
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CN115022378B (zh) * | 2022-08-03 | 2022-11-15 | 中国南方电网有限责任公司超高压输电公司广州局 | 输电阀控设备通讯方法、系统、阀塔监视设备和存储介质 |
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- 2018-11-21 US US16/463,122 patent/US11615908B2/en active Active
- 2018-11-21 WO PCT/CN2018/116776 patent/WO2019196412A1/zh unknown
- 2018-11-21 EP EP18880078.3A patent/EP3575725B1/en active Active
- 2018-11-21 CA CA3045868A patent/CA3045868C/en active Active
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Also Published As
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EP3575725A1 (en) | 2019-12-04 |
EP3575725A4 (en) | 2020-08-12 |
EP3575725B1 (en) | 2023-05-10 |
ES2951777T3 (es) | 2023-10-24 |
US11615908B2 (en) | 2023-03-28 |
CN109839016A (zh) | 2019-06-04 |
WO2019196412A1 (zh) | 2019-10-17 |
CA3045868A1 (en) | 2019-10-09 |
BR112019013876A2 (pt) | 2020-04-28 |
ZA201903603B (en) | 2023-04-26 |
US20200395159A1 (en) | 2020-12-17 |
CA3045868C (en) | 2022-05-17 |
MX2019008052A (es) | 2020-08-20 |
BR112019013876B1 (pt) | 2023-03-28 |
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