CN111070412A - 用于在连续过程中对含砾石骨料的混凝土混合物进行水合和搅拌的便携式混凝土搅拌机 - Google Patents
用于在连续过程中对含砾石骨料的混凝土混合物进行水合和搅拌的便携式混凝土搅拌机 Download PDFInfo
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Abstract
本发明涉及一种便携式混凝土搅拌机,其包括框架、连接到框架的料斗、连接到料斗的斜槽、向斜槽供水的供水系统、原动机和连接到原动机并由原动机驱动旋转的螺旋推运器,其中,料斗用于在其中接收含有砾石骨料的干的市售预包装混凝土混合物。螺旋推运器包括无轴的螺旋形的螺旋推运器主体,该螺旋推运器主体从料斗经由料斗中的孔口延伸到斜槽中。该螺旋推运器主体具有内部容积和从螺旋推运器主体延伸到内部容积中的多个指形部。螺旋推运器主体具有不均匀的节距,使得螺旋推运器主体的在斜槽中的第二部分具有比螺旋推运器主体的在料斗中的第一部分更大的节距。
Description
技术领域
本发明总体上涉及一种混凝土搅拌机,具体地说,涉及一种用于在连续的过程中对含砾石骨料的预包装混凝土混合物进行水合和搅拌的便携式混凝土搅拌机。
背景技术
混凝土是一种通常用于各种建筑应用的建筑材料。在许多情况下,特定应用所需的混凝土的量和/或可用于处理未固化混凝土的人员数量不保证混凝土通过搅拌机或预拌卡车输送。事实上,对于小型作业,混凝土通常是分批制备的,方法是将一袋或多袋预包装混凝土混合物倒入独轮车中,加入不同量的水,然后用工具如锄头或铁锹手工搅拌所得到的浆料,直到达到所需的稠度。对于稍大型作业,混凝土可以在旋转滚筒式搅拌机中由袋装混凝土混合物或原材料(例如骨料、水泥和水)搅拌,该旋转滚筒式搅拌机可以由例如电力或汽油或柴油发动机提供动力。
发明内容
本公开认识到用于搅拌混凝土的常规技术具有显著的缺点。例如,混凝土浆料经常太湿或太干,这可能导致需要反复向浆料中添加更多的水和/或干混合物,以获得期望的稠度。取决于进行搅拌的个人的技能和/或经验,不同批次混凝土的稠度通常有很大差异。此外,清洁用于制备混凝土的工具和滚筒搅拌机的工作是费力的。事实上,搅拌几百袋混凝土混合物后,通常会丢弃滚筒式搅拌机,这是因为从滚筒内的内部叶片中和周围的裂缝和小空间中移除干燥和硬化的混凝土是困难且费力的。
本公开还认识到,连续过程浆料搅拌机目前可用于搅拌多袋预包装砂浆混合物,以用于砌砖和砌石、接缝定位和其它应用。尽管这些预包装砂浆混合物的内容物根据预期应用和所需砂浆性能而变化,但是预包装砂浆混合物不包括粒度大于“砂”的骨料成分,所述“砂”在本文中根据温特沃斯分级表(Wentworth scale)定义为粒度在0.062mm和2.0mm之间的粒状材料。总体上,预包装砂浆混合物通常包括粒径约为0.5mm的相对均匀的硅砂。因为连续过程砂浆搅拌机专门设计成专门搅拌商业预包装砂浆混合物,所以这些连续过程机动搅拌机不能接受或搅拌商业上可获得的预包装混凝土混合物,因为它们不能容纳混凝土混合物中存在的砾石骨料,其中“砾石”根据温特沃斯分级表定义为粒径范围为2.0mm至64.0mm的粒状材料。
根据一个或更多个实施例,提供了改进的便携式混凝土搅拌机,其在连续过程中对多袋含砾石骨料的预包装混凝土混合物进行水合和搅拌。
在一个或更多个实施例中,便携式混凝土搅拌机包括框架、联接到框架并用于在其中接收含砾石骨料的干混凝土混合物的料斗、联接到料斗的斜槽、向便携式混凝土搅拌机供水的供水系统、原动机以及联接到原动机并由原动机驱动旋转的螺旋推运器。螺旋推运器包括无轴的螺旋形的螺旋推运器主体,该螺旋推运器主体从料斗经由料斗中的孔口延伸到斜槽中。螺旋推运器主体具有内部容积和从螺旋推运器主体延伸到内部容积中的多个指形部。螺旋推运器主体的在斜槽中的第二部分具有比螺旋推运器主体的在料斗中的第一部分更大的节距。
在各种实施例中,螺旋推运器主体的第二部分的节距可以连续增加或以步进方式增加。
在至少一些实施例中,便携式混凝土搅拌机被配置成便于清理,从而减少或消除滚筒式搅拌机常见的清理问题。
附图说明
图1示出了根据一个实施例的便携式混凝土搅拌机的立体图;
图2示出了根据一个实施例的便携式混凝土搅拌机的俯视图;
图3示出了根据一个实施例的便携式混凝土搅拌机的仰视图;
图4示出了根据一个实施例的便携式混凝土搅拌机的右侧视图;
图5示出了根据一个实施例的便携式混凝土搅拌机的左侧视图;
图6示出了根据一个实施例的便携式混凝土搅拌机的主视图;
图7示出了根据一个实施例的便携式混凝土搅拌机的后视图;和
图8是根据一个实施例的螺旋推运器的更详细的视图。
具体实施方式
现在参考附图,示出了根据一个实施例的便携式混凝土搅拌机100。特别地,图1提供了便携式混凝土搅拌机100的立体图;图2-3分别提供了便携式混凝土搅拌机100的俯视图和仰视图;图4-5分别提供了便携式混凝土搅拌机100的右侧和左侧视图;图6-7分别提供了便携式混凝土搅拌机100的主视图和后视图。如本文进一步描述的,便携式混凝土搅拌机100可用于在连续过程中对多袋含砾石骨料的预包装混凝土混合物进行水合和搅拌。例如,便携式混凝土搅拌机100可用于搅拌标准的40磅、50磅、60磅或80磅袋装的预包装混凝土混合物。在典型的连续操作中,便携式混凝土搅拌机100每小时可以生产约1立方码的混凝土。在不同的实施例中,通过简单地用更大或更小直径的螺旋推运器替换任何给定便携式搅拌机单元中的本文所述的螺旋推运器,可以获得更大或更小的输出。
在所示出的实施例中,便携式混凝土搅拌机100具有框架102,其可以由耐用材料形成,所述耐用材料例如为玻璃纤维、塑料、木材和/或管状钢。框架102具有手柄部分104,通过手柄部分104可以手动推动或拉动便携式混凝土搅拌机100,以将便携式混凝土搅拌机100定位在工作现场的期望位置。在图1-3和7所示的优选实施例中,手柄部分104在图4所示的右侧和图5所示的左侧之间是连续的,以允许使用者用单手移动便携式混凝土搅拌机100。框架102还包括一个或更多个(在图示的示例中为两个)支架106,在这个示例中,支架106与手柄部分104是一体的。支架106将框架102的后部部分支承在下方基底(underlyingsubstrate)101上(见图4-5)。框架102还包括前部部分108,一个或更多个(优选为两个)轮子110通过至少一个轴112联接到前部部分108。利用这种布置,使用者可以提起手柄部分104以将支架106提升到下方基底上方,在轮子110上将便携式混凝土搅拌机100滚动到工作现场的期望位置,然后在期望位置将便携式混凝土搅拌机100停放在稳定状态中。在各种实施例中,每个轮子110可以包括中心轮缘,充气或泡沫填充轮胎安装在该中心轮缘上,或者可选地,每个轮子110可以由实心盘(例如塑料或玻璃纤维)形成。
便携式混凝土搅拌机100还包括用于在其中接收干的预包装混凝土混合物(例如SakreteTM或QuikreteTM)的料斗120,所述干的预包装混凝土混合物典型地包括预定比例的水泥、骨料(例如砾石和可能的沙子)、促进剂、阻燃剂、粘合剂和其它专有化学品,以提高最终产品性能。预包装混凝土混合物通常包括当地来源的天然岩石或碎石或再生混凝土骨料,其粒径大于0.19英寸(约3mm),更常见地在0.375至1.5英寸之间。这种砾石骨料通常占预包装混凝土混合物总体积的60%至75%。料斗120优选由耐用材料形成,所述耐用材料例如为玻璃纤维、塑料或金属板(例如钢)。如图所示,料斗120具有边缘122、一个或更多个向内倾斜的侧壁124和底部126,考虑到所使用的预包装混凝土混合物的休止角,侧壁124具有适于确保平稳输送/排出的坡度,放置在料斗120中的混凝土混合物在重力作用下均匀地漏到/分配到底部126上。在底部126附近,侧壁124具有在其中形成的孔口128,螺旋推运器170延伸穿过该孔口128,并且预包装混凝土混合物通过螺旋推运器170的旋转输送通过该孔口128,如下文进一步讨论的。
如图所示,料斗120可以方便地包括开袋器125,在所示实施例中,开袋器125包括弓形锯齿状刀片。在一个优选实施例中,料斗120的侧壁124之间的间距设置为,使得落入料斗120的未打开的预包装混凝土混合物袋子的前表面将通过袋与料斗120的侧壁124的接触而凸出变形并处于张力下。开袋器125优选地位于料斗120内基本上前后居中的位置,并且相对于侧壁124的向内倾斜的斜面处于这样的高度处,即,使得开袋器125将刺穿袋子的张紧的前凸表面,从而允许其中容纳的混凝土混合物在重力的推动下倾泻到料斗120中。一旦被刺穿,袋子优选留在料斗120中,直到袋子的大部分内容物倾泻出,以减少空气携带的硅土粉尘的量。在袋子大部分清空之后,袋子可以通过其端部被提起,以将其内容物完全清空到料斗120中,然后可以从料斗120的顶部移除。
在不同的实施例中,料斗120可以具有多种尺寸。例如,在一些实施例中,料斗120在边缘122处的每个尺寸在大约12和24英寸之间,更特别地,在大约15和20英寸之间,再更特别地,在每个尺寸为大约17英寸。此外,在一些实施例中,料斗120的深度在约7和16英寸之间,更特别地,在约8和12英寸之间。在这些实施例中,料斗120的尺寸设置为适于容纳大约100磅的干混凝土混合物。
在至少一些优选实施例中,希望便携式混凝土搅拌机100便于一个或两个工作人员提升、运输、配置和使用。例如,在一些实施例中,希望便携式混凝土搅拌机100小于约80磅,更优选小于约60磅,甚至更优选为约50磅。此外,框架102、轮子110和料斗120的尺寸和构造使得料斗120的顶部在下方基底101上方的高度小于约4英尺,更优选地,在下方基底101上方的高度小于约3英尺,再更优选地,在下方基底101上方的高度在约24英寸至30英寸的范围内。这种高度限制使得提升多袋混凝土混合物并将它们的内容物装载到料斗120的顶部的任务比装载传统桶式搅拌机更加容易和安全。
料斗120的孔口128与斜槽130连通,斜槽130在所示实施例中具有底部134和两个向内倾斜的侧壁132,并在料斗120和开口端136之间延伸。在一个示例性实施例中,斜槽130的长度在大约16和30英寸之间,更特别地,在大约16和24英寸之间,再更特别地,在大约16和20英寸之间。这些长度范围允许便携式混凝土搅拌机100保持紧凑,同时为混凝土混合物在穿过斜槽130时与水充分混合提供足够的机会。当便携式混凝土搅拌机100搁置在水平基底101上时,斜槽130优选地具有从料斗120的孔口128到开口端136的如图4中的角度A所示的倾斜度。在各种实施例中,角度A优选地在大约-5度(其中斜槽130轻微倾斜)至30度倾角的范围内,更特别地为大约0至30度,并且再更特别地,在1至10度的范围内,并且更特别地,为大约5度。在斜槽130具有小的向下倾斜的优选实施例中,在重力的推动下,在斜槽130中形成的混凝土浆料缓慢地流向开口端136。在图示的实施例中,开口端136以与法线成一角度倾斜,这允许便携式混凝土搅拌机100在不使用时通过将便携式混凝土搅拌机100放置在其中开口端136和轮子110接触下方基底101的竖直位置而方便地存放在较小的地板空间中。
斜槽130的顶部可选但优选地在螺旋推运器170旋转期间通过防护件140覆盖,防护件140包括一个或更多个元件142,它们一起基本上桥接侧壁132的顶部之间的开口区域。防护件140有助于防止由于使用者的身体或衣服与旋转的螺旋推运器170非有意接触而造成伤害。在至少一些优选实施例中,防护件140通过铰链144枢转地连接到料斗120,使得使用者可以向上并远离斜槽130的顶部旋转防护件140,以便于清洁。在图示的示例中,防护件140包括加强杆146,加强杆146可以联接(例如,焊接或螺栓连接)到元件142。如图4所示,加强杆146优选为防护件140提供足够的结构支承,以允许一袋或更多袋预包装混凝土混合物袋148靠在加强杆146上被运输或装载。在其它实施例中,防护件140可以覆盖斜槽130和料斗120中的螺旋推运器170。例如,在一个示例中,防护件140可以包括一系列直杆,这些直杆搁置在斜槽130的顶面上,穿过包括孔口128的前侧壁124中的孔,并延伸到料斗120的后侧壁124,从而提供保护,防止沿其整个长度与螺旋推运器170接触。在至少一些实施例中,斜槽130可以可选地进一步包括跨越侧壁132的压紧带(未示出),该压紧带限制螺旋推运器170的轴向位移(例如,当螺旋推运器170通过与混凝土混合物中的砾石骨料接触而从轴向对准移位时)。
便携式混凝土搅拌机100还包括用于驱动螺旋推运器170旋转的原动机150。在所示出示例中,原动机150是电动机,其可移除地联接(例如通过螺栓)到料斗120的下后表面,并且由电动机罩151部分地屏蔽。所示的安装布置保护电动机150免受物理冲击和与水的接触,并在电动机150周围提供空气空间以确保充分冷却。在这种布置中,料斗120中的小通孔(未具体示出)允许电动机150的电动机轴联接到螺旋推运器170并使螺旋推运器170轴向旋转。例如,在一个实施例中,电动机150的电动机轴通过左手Acme螺纹联接到螺旋推运器170。在类似于图4所示的一些实施例中,电动机150可以由标准110-230V交流电源供电,如果电动机150是直流电动机,则标准110-230V交流电源可以由电力转换器152转换成合适电压的直流电力。在其它实施例中,电动机150可替代地或附加地由电池供电,所述电池为例如标准12V直流汽车电池。在使用1/6马力的直流电动机测试便携式混凝土搅拌机100时,标准12V直流汽车电池被证明能够为50袋80磅的混凝土混合物的混合提供动力。在至少一些实施例中,便携式混凝土搅拌机100的动力系统包括手动多位置开关154,该开关允许螺旋推运器170停止或在正向和反向方向上操作。尽管图示的实施例采用了电动机(例如,定速或变速直流或交流电动机),但是应当理解,电动机150也可以替代性地用汽油或柴油发动机来实现。
便携式混凝土搅拌机100还包括供水系统160,如图5中最佳地示出的。供水系统160包括连接器162,例如标准3/4英寸阴软管连接器或“快速连接”连接器,其支持标准花园软管或水箱的附接以提供连续供水。输入的水通过输入管164流到计量装置166,所述计量装置166为例如电磁阀和/或手动致动阀。计量装置166允许使用者例如通过旋转控制旋钮或杆来增加或减少水通过输出管168进入料斗120和/或斜槽130的流速。因此,例如,在湿润、潮湿或湿的条件下,或者在需要更干燥的混合物的应用中,使用者可以降低水被引入料斗120和/或斜槽130的速率,并且在干燥条件下或者在需要更湿的混合物的应用中,使用者可以提高水被引入斜槽130的速率,以获得期望的浆料稠度。由供水系统160供应的水量优选由操作者控制,并且相对于装载到料斗120中的混凝土混合物的量而言是无体积的。
在一些实施例中,输出管168例如靠近孔口128将水引入斜槽130内的干混凝土混合物中。在目前优选的其它实施例中,输出管168在料斗120的底部126的中心非常靠近螺旋推运器170的位置将水引入干混凝土混合物中。这种构造为毛细作用的开始提供了更多的时间,允许使用更短的斜槽130,并改善了斜槽130端部的最终浆料的均匀性。
参照图8,示出了根据一个实施例的螺旋推运器170的更详细视图。如上所述,螺旋推运器170通过电动机150驱动旋转,以将干混凝土混合物从料斗120通过孔口128输送到斜槽130中,将混凝土混合物与斜槽130中的水混合,并将所得的即将浇注的混凝土浆料输送到斜槽130的开口端136。
在所示出的实施例中,螺旋推运器170包括凸耳172和螺旋推运器主体174,螺旋推运器170通过凸耳172联接到电动机150,凸耳172和螺旋推运器主体174都优选由钢制成。螺旋推运器主体174的设计促进了混凝土混合物和供水系统提供的水的有效彻底混合。例如,在优选实施例中,螺旋推运器主体174采取无轴螺旋的形式(在所示实施例中为右手螺旋),因此,重要的是,缺少中心轴。螺旋推运器主体174中没有中心轴促进了水与混凝土混合物的更彻底混合,并消除了许多接头和裂缝,在这些接头和裂缝处,浆料可以更容易地逸出清洁过程,从而加速并最终降低浆料沿斜槽的前进速度和螺旋推运器170的最终搅拌效果。对于正交于螺旋推运器主体174的长轴正交测量时具有2.5英寸的基本上均匀的外径的螺旋推运器170而言,螺旋推运器主体174中没有中心轴也允许便携式混凝土器搅拌机100适于使用具有0.75至1.0英寸粒径的大砾石骨料的预包装混凝土混合物。
螺旋推运器主体174也优选具有不均匀的节距。特别地,螺旋推运器主体174的设置在料斗120内的第一部分176具有较小的第一节距,而螺旋推运器主体174的设置在斜槽130内(并且可能延伸到料斗120内)的第二部分178优选具有较大的第二节距。在各种实施方式中,第二部分178的较大间距可以是固定的,或者可以随着第二部分178从第一部分176向开口端出口136延伸而在第二部分178的部分或全部长度上均匀地或逐步地增加。作为一个示例,螺旋推运器主体174的设置在料斗120内的第一部分176可以具有介于约0.2和0.9之间的节径比,更具体地,介于约0.4和0.6之间的节径比,再更具体地为约0.5的节径比(例如,螺旋推运器直径为2.5英寸时,节距为1.25英寸)。在该示例中,螺旋推运器主体174的设置在斜槽130中(并且可能延伸到料斗120中)的第二部分178在斜槽130的开口端136处的节径比可以在约0.3至1.8的范围内,更特别地,在约0.6至1.5的范围内(例如,螺旋推运器直径为2.5英寸时,节距为1.5至3.75英寸)。在一些实施例中,第一部分176可延伸螺旋推运器主体174的总长度的约25%至35%,第二部分178可延伸螺旋推运器主体174的剩余长度。第一部分176和第二部分178的相对长度以及它们各自的节径比优选结合斜槽130的斜度来选择,以确保混凝土浆料在离开斜槽130的开口端136时充分搅拌。
如图8中进一步示出的,螺旋推运器主体174的第二部分178具有至少一个、优选多个延伸到螺旋的内部体积中的指形部180。指形部180用于中断和延迟湿的混凝土混合物的流动,并增加内部剪切,从而改善混合的均匀性并确保更均匀的最终混合物。尽管所示出的实施例采用由矩形截面的扁平金属棒形成的指形部180,但是应当理解,指形部180可替代地采取其它横截面形状或多种形状的组合,例如圆柱形或其它横截面形状的棒与扁平金属棒的组合。应当理解,必须至少有一个指形部180,利用多个指形部180可以获得最佳性能。在螺旋推运器170长约19英寸且外径约2.5英寸的一个优选实施例中,螺旋推运器主体174包括四个指形部180,第一指形部位于料斗120的前侧壁124中的孔口128处,第二指形部位于沿斜槽130向下约4英寸处,第三指形部位于距孔口128约8英寸处,第四指形部位于距孔口128约16英寸处。螺旋推运器主体174的第二部分178的增大的节距优选地被选择成抵消指形部180提供的流动阻力(以及因此的速度阻力)。沿着螺旋推运器主体174的长度的节距增加以足够的相对速度沿着斜槽130移动混凝土混合物,从而减少或消除斜槽130中不希望的材料堆积。
尽管这里描述的便携式混凝土搅拌机100能够连续运行,但是应当理解,来自斜槽130的混凝土浆料流仅在操作者希望的时间内是连续的。如果需要,操作者可以在斜槽130中部分搅拌混凝土混合物的情况下,停止螺旋推运器170的旋转大约15或20分钟,然后恢复操作,而在所得混凝土浆料的工作性能上没有任何问题。
如上所述,在至少一些实施例中,便携式混凝土搅拌机包括框架、联接到框架且用于在其中接收含砾石骨料的干混凝土混合物的料斗、连接到料斗的斜槽、向便携式混凝土搅拌机供水的供水系统、原动机以及联接到原动机并由原动机驱动旋转的螺旋推运器。螺旋推运器包括无轴的螺旋形的螺旋推运器主体,该螺旋推运器主体从料斗经由料斗中的孔口延伸到斜槽中。螺旋推运器主体具有内部容积和从螺旋推运器主体延伸到内部容积中的多个指形部。螺旋推运器主体具有不均匀的节距,使得螺旋推运器主体的在斜槽中的第二部分具有比螺旋推运器主体的在料斗中的第一部分更大的节距。
虽然已经具体示出和描述了各种实施例,但是本领域技术人员将理解,在不脱离所附权利要求的精神和范围的情况下,可以在形式和细节上进行各种改变,并且这些替代实施例都落入所附权利要求的范围内。这里对一个或多个实施例的引用不一定指相同的一个或多个实施例。当用于修改数量或范围时,术语“大约”或“近似”被限定为表示所述值的加或减10%。术语“联接”被限定为表示多个部件可能通过一个或更多个中间部件的附接。
Claims (19)
1.一种便携式混凝土搅拌机,包括:
框架;
联接到框架的料斗,该料斗用于在其中接收含砾石骨料的干混凝土混合物,料斗中具有孔口;
联接到料斗的斜槽;
向便携式混凝土搅拌机供水的供水系统;
原动机;和
联接到原动机并由原动机驱动旋转的螺旋推运器,其中,螺旋推运器包括从料斗经由所述孔口延伸到斜槽中的无轴的螺旋形的螺旋推运器主体,该螺旋推运器主体具有内部容积和从螺旋推运器主体延伸到内部容积中的多个指形部,并且螺旋推运器主体具有不均匀的节距,使得螺旋推运器主体的在斜槽中的第二部分具有比螺旋推运器主体的在料斗中的第一部分更大的节距。
2.根据权利要求1所述的便携式混凝土搅拌机,其中,所述原动机是直流电动机。
3.根据权利要求2所述的便携式混凝土搅拌机,其中,所述便携式混凝土搅拌机还包括交流至直流转换器。
4.根据权利要求1所述的便携式混凝土搅拌机,其中,所述原动机连接到料斗。
5.根据权利要求1所述的便携式混凝土搅拌机,其中,所述便携式混凝土搅拌机还包括至少一个联接到所述框架的轮子。
6.根据权利要求5所述的便携式混凝土搅拌机,其中,所述框架还包括多个支架,用于将所述便携式混凝土搅拌机支承在基底上。
7.根据权利要求1所述的便携式混凝土搅拌机,其中:
所述便携式混凝土搅拌机具有第一侧和相对的第二侧;和
所述框架包括从第一侧延伸到第二侧的手柄。
8.根据权利要求1所述的便携式混凝土搅拌机,其中,所述螺旋推运器的至少一部分由防护件覆盖。
9.根据权利要求8所述的便携式混凝土搅拌机,其中,所述防护件枢转地联接到所述料斗。
10.根据权利要求1所述的便携式混凝土搅拌机,其中,所述便携式混凝土搅拌机还包括设置在料斗内的开袋刀片。
11.根据权利要求1所述的便携式混凝土搅拌机,其中,所述便携式混凝土搅拌机具有大约50磅的重量。
12.根据权利要求1所述的便携式混凝土搅拌机,其中,所述料斗具有最大提升高度小于约3英尺的边缘。
13.根据权利要求1所述的便携式混凝土搅拌机,其中,所述螺旋推运器主体的第二部分具有介于约0.3和1.8之间的节径比。
14.根据权利要求13所述的便携式混凝土搅拌机,其中,所述螺旋推运器主体的所述第一部分具有介于约0.2和0.9之间的节径比。
15.根据权利要求1所述的便携式混凝土搅拌机,其中,所述供水系统包括将水提供到所述斜槽中的出水口。
16.根据权利要求1所述的便携式混凝土搅拌机,其中:
所述料斗具有底部;和
所述供水系统包括出水口,所述出水口在所述底部将水提供到料斗中。
17.根据权利要求1所述的便携式混凝土搅拌机,其中,所述多个指形部中的一个指形部大致设置在所述孔口处。
18.根据权利要求1所述的便携式混凝土搅拌机,其中,所述斜槽具有约16至30英寸的长度。
19.根据权利要求1所述的便携式混凝土搅拌机,其中,所述斜槽相对于水平面具有大约在-5度和30度之间的倾斜角度。
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US10543620B1 (en) | 2020-01-28 |
US10259140B1 (en) | 2019-04-16 |
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