CN102768128B - Aggregate sampling device, hot aggregate bin and asphalt mixing plant - Google Patents
Aggregate sampling device, hot aggregate bin and asphalt mixing plant Download PDFInfo
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Abstract
本发明公开了一种骨料取样装置、热骨料仓和沥青搅拌站，该骨料取样装置包括取样筒(1)、螺旋输送叶片(2)和旋转驱动装置，其中：取样筒(1)一端设置有取样口，所述取样口伸入到热骨料仓的内部，取样筒(1)的另一端固定在热骨料仓的侧壁上，在该固定端处设置有安装座，取样筒(1)上设置有卸料出口，卸料出口处连接有卸料分支(5)；螺旋输送叶片(2)安装于取样筒(1)的内部，用于将骨料输送至卸料分支(5)处；螺旋输送叶片(2)转轴的一端安装在所述安装座上，并与所述旋转驱动装置固定连接，所述旋转驱动装置用于驱动螺旋输送叶片(2)的旋转。采用本发明，可以增加取样深度，从而可以提高骨料取样的准确度，而且操作简便。
The invention discloses an aggregate sampling device, a hot aggregate bin and an asphalt mixing station. The aggregate sampling device includes a sampling cylinder (1), a screw conveying blade (2) and a rotary drive device, wherein: the sampling cylinder (1) One end is provided with a sampling port, and the sampling port extends into the inside of the hot aggregate bin, and the other end of the sampling cylinder (1) is fixed on the side wall of the hot aggregate bin, and a mounting seat is arranged at the fixed end for sampling The cylinder (1) is provided with a discharge outlet, and the discharge outlet is connected with a discharge branch (5); the screw conveying blade (2) is installed inside the sampling cylinder (1) for conveying the aggregate to the discharge branch (5): One end of the rotating shaft of the screw conveying blade (2) is installed on the mounting seat, and is fixedly connected with the rotating drive device, and the rotating drive device is used to drive the rotation of the screw conveying blade (2). By adopting the invention, the sampling depth can be increased, thus the accuracy of aggregate sampling can be improved, and the operation is simple and convenient.
Description
技术领域 technical field
本发明涉及机械技术领域，特别是涉及一种骨料取样装置、热骨料仓和沥青搅拌站。 The invention relates to the technical field of machinery, in particular to an aggregate sampling device, a hot aggregate bin and an asphalt mixing station.
背景技术 Background technique
沥青搅拌站主要用于生产沥青混合料，沥青混合料的生产过程对于路面的成形质量起着至关重要的作用。沥青混合料的主要原料包括骨料、矿粉和沥青，骨料即石料，是沥青混合料的主要原料之一，骨料根据粒径的不同又可以细分为四到六种，例如可以分为小于3mm、3mm～6mm、6mm～11mm、11mm～22mm、22mm～35mm。不同粒径范围的骨料经过振动筛的筛分后，分别进入到热骨料仓的不同储仓中。 The asphalt mixing plant is mainly used to produce asphalt mixture, and the production process of asphalt mixture plays a vital role in the forming quality of the pavement. The main raw materials of asphalt mixture include aggregate, mineral powder and asphalt. Aggregate is stone, which is one of the main raw materials of asphalt mixture. It is less than 3mm, 3mm~6mm, 6mm~11mm, 11mm~22mm, 22mm~35mm. The aggregates of different particle size ranges are screened by the vibrating screen and then enter into different storage bins of the hot aggregate bin.
由于沥青混合料对于骨料级配(各储仓中粒径不同的骨料进行混合的比例)精度要求非常高，所以，一般在热骨料仓上设置骨料取样装置，对热骨料仓中的骨料进行取样，以确定热骨料仓的各储仓中骨料的粒径情况。根据骨料取样的结果，可以确定将各储仓中骨料进行混合时的配比，以达到相应的工程要求。 As the asphalt mixture has very high requirements on the accuracy of aggregate grading (mixing ratio of aggregates with different particle sizes in each storage silo), an aggregate sampling device is generally installed on the hot aggregate silo. Sampling of the aggregate in the hot aggregate silo to determine the particle size of the aggregate in each silo of the hot aggregate silo. According to the results of aggregate sampling, the mixing ratio of the aggregate in each storage bin can be determined to meet the corresponding engineering requirements.
目前，沥青搅拌站的热骨料仓使用的骨料取样装置一般采用如图1所示的取样筒结构。在取样时，操作人员可以打开取样筒的盖，并通过工具采集热骨料仓中的骨料。 At present, the aggregate sampling device used in the hot aggregate bin of the asphalt mixing plant generally adopts the sampling cylinder structure shown in Figure 1. When sampling, the operator can open the cover of the sampling cylinder and collect the aggregate in the hot aggregate bin through the tool.
然而，采用现有的骨料取样装置进行骨料取样，只能取到仓体侧壁附近的骨料。可是，一般经振动筛筛分后的骨料在进入各储仓时，在仓体中会逐渐形成锥形堆并堆积上升，在堆积的过程中，骨料会出现离析现象，即在储仓的粒径范围内不同粒径的骨料并不是均匀分布，粒径较大的骨料在侧壁的附近比较集中，这将导致取样结果不能准确反映储仓中骨料的实际情况。 However, when using the existing aggregate sampling device for aggregate sampling, only the aggregate near the side wall of the bin body can be obtained. However, when the aggregate screened by the vibrating screen generally enters each storage bin, it will gradually form a conical pile in the bin body and accumulate up. The aggregates of different particle sizes within the particle size range are not evenly distributed, and the aggregates with larger particle sizes are concentrated near the side wall, which will cause the sampling results to not accurately reflect the actual situation of the aggregates in the storage bin.
发明内容 Contents of the invention
本发明的目的在于提供一种骨料取样装置、热骨料仓和沥青搅拌站，以提高骨料取样的准确度。为此，本发明实施例采用如下技术方案： The object of the present invention is to provide an aggregate sampling device, a hot aggregate bin and an asphalt mixing station, so as to improve the accuracy of aggregate sampling. For this reason, the embodiment of the present invention adopts following technical scheme:
一种骨料取样装置，包括取样筒、螺旋输送叶片和旋转驱动装置，其中： An aggregate sampling device comprising a sampling cylinder, a screw conveying blade and a rotary drive, wherein:
取样筒一端设置有取样口，所述取样口伸入到热骨料仓的内部，取样筒的另一端固定在热骨料仓的侧壁上，在该固定端处设置有安装座，取样筒上设置有卸料出口，卸料出口处连接有卸料分支； One end of the sampling cylinder is provided with a sampling port, and the sampling port extends into the interior of the hot aggregate bin, and the other end of the sampling cylinder is fixed on the side wall of the hot aggregate bin, and a mounting seat is arranged at the fixed end, and the sampling cylinder There is a discharge outlet on the top, and a discharge branch is connected to the discharge outlet;
螺旋输送叶片安装于取样筒的内部，用于将骨料输送至卸料分支处； The screw conveying blade is installed inside the sampling cylinder for conveying the aggregate to the discharge branch;
螺旋输送叶片转轴的一端安装在所述安装座上，并与所述旋转驱动装置固定连接，所述旋转驱动装置用于驱动螺旋输送叶片的旋转。 One end of the rotating shaft of the screw conveying blade is installed on the mounting seat, and is fixedly connected with the rotation driving device, and the rotation driving device is used to drive the rotation of the screw conveying blade.
优选的，螺旋输送叶片位于卸料分支和取样筒固定端之间的叶片的螺旋方向，与其位于卸料分支和取样筒取样口之间的叶片的螺旋方向相反。 Preferably, the helical direction of the blades of the spiral conveying blades located between the discharge branch and the fixed end of the sampling cylinder is opposite to the spiral direction of the blades located between the discharge branch and the sampling port of the sampling cylinder.
优选的，取样筒的取样口具有倾斜的端面。 Preferably, the sampling port of the sampling cylinder has an inclined end face.
优选的，所述旋转驱动装置，具体为旋转摇臂或电动机。 Preferably, the rotary drive device is specifically a rotary rocker arm or a motor.
优选的，所述安装座由密封法兰和轴承构成，其中： Preferably, the mounting seat is composed of a sealing flange and a bearing, wherein:
密封法兰与热骨料仓的侧壁密封固定连接； The sealing flange is sealed and fixedly connected with the side wall of the hot aggregate silo;
轴承固定于密封法兰的中部； The bearing is fixed in the middle of the sealing flange;
螺旋输送叶片的转轴安装于轴承中。 The rotating shaft of the screw conveying blade is installed in the bearing.
优选的，卸料分支的出口处设置有卸料门。 Preferably, a discharge door is provided at the outlet of the discharge branch.
一种热骨料仓，包括如上所述的骨料取样装置。 A thermal aggregate silo includes the above-mentioned aggregate sampling device.
一种沥青搅拌站，包括如上所述的热骨料仓。 An asphalt mixing plant includes the above-mentioned hot aggregate bin.
本发明的实施例具有以下优点，骨料取样装置包括取样筒、螺旋输送叶片和旋转驱动装置，其中，取样筒一端设置有取样口，所述取样口伸入到热骨料仓的内部，取样筒的另一端固定在热骨料仓的侧壁上，在该固定端处设置有安装座，取样筒上设置有卸料出口，卸料出口处连接有卸料分支，螺旋输送叶片 安装于取样筒的内部，用于将骨料输送至卸料分支处，螺旋输送叶片转轴的一端安装在所述安装座上，并与所述旋转驱动装置固定连接，所述旋转驱动装置用于驱动螺旋输送叶片的旋转。这样，可以增加取样深度，从而可以提高骨料取样的准确度，而且取样操作相对简便。另外，通过安装座的拆装，可以实现骨料取样装置的快速拆装，便于维护。 Embodiments of the present invention have the following advantages. The aggregate sampling device includes a sampling cylinder, a screw conveying blade and a rotary drive device, wherein a sampling port is provided at one end of the sampling cylinder, and the sampling port extends into the inside of the hot aggregate bin for sampling. The other end of the cylinder is fixed on the side wall of the hot aggregate bin, and a mounting seat is provided at the fixed end. A discharge outlet is provided on the sampling cylinder, and a discharge branch is connected to the discharge outlet. The screw conveying blade is installed on the sampling The inside of the cylinder is used to convey the aggregate to the discharge branch. One end of the screw conveyor blade shaft is installed on the mounting base and is fixedly connected with the rotary drive device, which is used to drive the screw conveyor. The rotation of the blades. In this way, the sampling depth can be increased, thereby improving the accuracy of aggregate sampling, and the sampling operation is relatively simple. In addition, through the disassembly and assembly of the mounting seat, the aggregate sampling device can be quickly disassembled and assembled, which is convenient for maintenance.
附图说明 Description of drawings
图1为现有技术中骨料取样装置的结构示意图； Fig. 1 is the structural representation of aggregate sampling device in the prior art;
图2为本发明实施例提供的骨料取样装置的结构示意图； Fig. 2 is the structural representation of the aggregate sampling device provided by the embodiment of the present invention;
图3为本发明实施例提供的骨料取样装置的结构示意图。 Fig. 3 is a schematic structural view of an aggregate sampling device provided by an embodiment of the present invention.
图例说明 illustration
1、取样筒 2、螺旋输送叶片 1. Sampling cylinder 2. Spiral conveying blade
31、旋转摇臂 32、电动机 31. Rotating rocker arm 32. Electric motor
41、密封法兰 42、轴承 41. Sealing flange 42. Bearing
5、卸料分支 6、卸料门 5. Unloading branch 6. Unloading door
7、定位套 8、销轴 7. Locating sleeve 8. Pin shaft
9、卡簧 9. Circlip
具体实施方式 Detailed ways
下面将结合本发明中的附图，对本发明中的技术方案进行清楚、完整的描述，显然，所描述的实施例是本发明的一部分实施例，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的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。 The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
本发明实施例提供了一种骨料取样装置，如图2所示，包括取样筒1、螺旋输送叶片2和旋转驱动装置，其中：取样筒1一端设置有取样口，所述取样 口伸入到热骨料仓的内部，取样筒1的另一端固定在热骨料仓的侧壁上，在该固定端处设置有安装座，取样筒1上设置有卸料出口，卸料出口处连接有卸料分支5；螺旋输送叶片2安装于取样筒1的内部，用于将骨料输送至卸料分支5处；螺旋输送叶片2转轴的一端安装在所述安装座上，并与所述旋转驱动装置固定连接，所述旋转驱动装置用于驱动螺旋输送叶片2的旋转。 The embodiment of the present invention provides a kind of aggregate sampling device, as shown in Fig. 2, comprises sampling cylinder 1, screw conveying blade 2 and rotary driving device, wherein: one end of sampling cylinder 1 is provided with sampling port, and described sampling port extends into To the inside of the hot aggregate bin, the other end of the sampling cylinder 1 is fixed on the side wall of the hot aggregate bin, and a mounting seat is provided at the fixed end, and a discharge outlet is provided on the sampling cylinder 1, and the discharge outlet is connected to There is a discharge branch 5; the screw conveying blade 2 is installed inside the sampling cylinder 1 for conveying the aggregate to the discharge branch 5; one end of the screw conveying blade 2 shaft is installed on the mounting seat, and is connected with the The rotary driving device is fixedly connected, and the rotary driving device is used to drive the rotation of the screw conveying blade 2 .
具体的，可以在热骨料仓的侧壁上设置安装孔，安装孔的直径与取样筒1的直径相同，取样筒1可以与侧壁在安装孔处焊接，也可以在取样筒1端部设置法兰，取样筒1与侧壁通过螺栓连接。取样筒1的固定端可以具有封闭的结构，并在封闭面上设置与螺旋输送叶片2的转轴相配合的轴孔。卸料分支5优选设置在取样筒1的底部。 Specifically, a mounting hole can be provided on the side wall of the hot aggregate silo, the diameter of the mounting hole is the same as that of the sampling cylinder 1, and the sampling cylinder 1 can be welded to the side wall at the mounting hole, or can be placed at the end of the sampling cylinder 1 A flange is provided, and the sampling cylinder 1 is connected to the side wall by bolts. The fixed end of the sampling cylinder 1 may have a closed structure, and a shaft hole matched with the rotating shaft of the screw conveying blade 2 is provided on the closed surface. The discharge branch 5 is preferably arranged at the bottom of the sampling cylinder 1 .
在取样过程中，旋转驱动装置带动螺旋输送叶片2转动，螺旋输送叶片2将带动骨料沿取样筒1输送，当骨料被输送至卸料分支5时，将进入卸料分支5，并通过其出口卸出，从而实现骨料取样。采用螺旋输送叶片2进行骨料的输送，可以加深取样深度，进而可以提高骨料取样的准确度，而且取样操作简便。另外，通过安装座的拆装，可以实现取样装置的快速拆装，便于维护。 During the sampling process, the rotary driving device drives the screw conveying blade 2 to rotate, and the screw conveying blade 2 will drive the aggregate to be transported along the sampling cylinder 1. When the aggregate is transported to the discharge branch 5, it will enter the discharge branch 5 and pass through Its outlet is unloaded, thus enabling aggregate sampling. Adopting the screw conveying blade 2 to transport the aggregate can deepen the sampling depth, thereby improving the accuracy of aggregate sampling, and the sampling operation is simple and convenient. In addition, the quick disassembly and assembly of the sampling device can be realized through the disassembly and assembly of the mounting seat, which is convenient for maintenance.
优选的，如图2所示，螺旋输送叶片2位于卸料分支5和取样筒1固定端之间的叶片的螺旋方向，与其位于卸料分支5和取样筒1取样口之间的叶片的螺旋方向相反。 Preferably, as shown in Figure 2, the helical direction of the blade of the screw conveying blade 2 between the discharge branch 5 and the fixed end of the sampling cylinder 1 is the same as the spiral direction of the blade between the discharge branch 5 and the sampling port of the sampling cylinder 1. in the opposite direction.
卸料分支5与取样筒1的连接位置优选设置在取样筒1固定端附近的底部，设置反向螺旋的叶片，可以阻止骨料继续向取样筒1的固定端输送，从而使骨料进入到卸料分支5中，而且，也可以防止骨料被输送到取样筒1的固定端，细料进入到缝隙中，避免出现卡滞与轴承损坏的问题。 The connection position between the unloading branch 5 and the sampling cylinder 1 is preferably set at the bottom near the fixed end of the sampling cylinder 1, and a reverse spiral blade is provided to prevent the aggregate from continuing to be transported to the fixed end of the sampling cylinder 1, so that the aggregate enters the In the unloading branch 5, moreover, it can also prevent the aggregate from being transported to the fixed end of the sampling cylinder 1, and the fine material from entering the gap, so as to avoid the problems of stagnation and bearing damage.
优选的，取样筒1的取样口具有倾斜的端面。具体的，可以如图2所示，取样筒1的顶部的长度较长，而底部的长度较短。取样筒1顶部的端部可以与螺旋输送叶片2的端部对齐，这样取样筒1可以起到遮挡的作用，防止上方掉落的骨料砸伤螺旋输送叶片2。而取样筒1的底部长度较短，可以增大螺旋输 送叶片2与骨料的接触面积，从而可以增大取料量，提升取样速度，也可以提升取样的准确度。 Preferably, the sampling port of the sampling cylinder 1 has an inclined end surface. Specifically, as shown in FIG. 2 , the length of the top of the sampling cylinder 1 is longer, while the length of the bottom is shorter. The end of the top of the sampling cylinder 1 can be aligned with the end of the screw conveying blade 2, so that the sampling cylinder 1 can play a role of shielding, preventing the aggregate falling from above from damaging the spiral conveying blade 2. The bottom length of the sampling cylinder 1 is shorter, which can increase the contact area between the screw conveying blade 2 and the aggregate, thereby increasing the amount of material taken, improving the sampling speed, and also improving the accuracy of sampling.
具体的，旋转驱动装置可以为旋转摇臂31或电动机32。如图2所示，旋转摇臂31作为旋转驱动装置，旋转摇臂31可以通过定位套7与螺旋输送叶片2的转轴连接，并通过销轴8固定，从而，摇动旋转摇臂31可以驱动螺旋输送叶片2旋转。同时，可以在旋转摇臂31外侧的螺旋输送叶片2转轴上设置卡簧9，以防止螺旋输送叶片2前后窜动。如图3所示，电动机32作为旋转驱动装置，电动机32与螺旋输送叶片2的转轴可以通过键连接，从而，电动机32可以驱动螺旋输送叶片2旋转。在转轴上可以设置有定位套7以防止螺旋输送叶片2前后窜动。 Specifically, the rotary driving device may be a rotary rocker arm 31 or a motor 32 . As shown in Figure 2, the rotating rocker arm 31 is used as a rotating drive device. The rotating rocker arm 31 can be connected with the rotating shaft of the screw conveying blade 2 through the positioning sleeve 7, and fixed by the pin shaft 8, so that the rotating rocker arm 31 can drive the screw. The conveying blade 2 rotates. At the same time, a jumper 9 can be arranged on the rotating shaft of the screw conveying blade 2 outside the rotating rocker arm 31 to prevent the screw conveying blade 2 from moving back and forth. As shown in FIG. 3 , the motor 32 is used as a rotation driving device, and the motor 32 and the rotating shaft of the screw conveying blade 2 can be connected by a key, so that the motor 32 can drive the screw conveying blade 2 to rotate. A positioning sleeve 7 may be arranged on the rotating shaft to prevent the screw conveying blade 2 from moving back and forth.
具体的，所述安装座由密封法兰41和轴承42构成，其中：密封法兰41与热骨料仓的侧壁密封固定连接；轴承42固定于密封法兰41的中部；螺旋输送叶片2的转轴安装于轴承42中。 Specifically, the mounting seat is composed of a sealing flange 41 and a bearing 42, wherein: the sealing flange 41 is sealed and fixedly connected with the side wall of the thermal aggregate bin; the bearing 42 is fixed in the middle of the sealing flange 41; the screw conveying blade 2 The rotating shaft is installed in the bearing 42.
密封法兰41可以为圆形，外径大于取样筒1的外径，可以通过螺栓与热骨料仓的侧壁密封固定连接。在密封法兰41的中部可以设置有轴孔，螺旋输送叶片2的转轴可以从轴孔中穿过。为了方便拆装，密封法兰41可以分为两个半圆板。轴承42可以通过轴承座以螺栓连接固定在密封法兰41中部。密封法兰41的设置在起到将轴承42固定在热骨料仓侧壁上的作用的同时，还具有密封的作用，可以防止粉尘和细料泄露。 The sealing flange 41 can be circular, with an outer diameter larger than that of the sampling cylinder 1, and can be sealed and fixedly connected with the side wall of the hot aggregate bin by bolts. A shaft hole may be provided in the middle of the sealing flange 41, and the rotating shaft of the screw conveying blade 2 may pass through the shaft hole. In order to facilitate assembly and disassembly, the sealing flange 41 can be divided into two semicircular plates. The bearing 42 can be fixed on the middle part of the sealing flange 41 through the bearing seat with bolt connection. The setting of the sealing flange 41 not only plays the role of fixing the bearing 42 on the side wall of the hot aggregate silo, but also has the function of sealing, which can prevent dust and fine materials from leaking.
优选的，在卸料分支5的出口处可以设置卸料门6。在不进行骨料取样时，可以将卸料门6关闭，防止粉尘和细料泄露。在进行骨料取样时，可以将卸料门6打开。 Preferably, a discharge door 6 may be provided at the outlet of the discharge branch 5 . When aggregate sampling is not performed, the discharge door 6 can be closed to prevent dust and fine material from leaking. When performing aggregate sampling, the discharge door 6 can be opened.
本发明实施例还提供了一种热骨料仓，包括如上所述的骨料取样装置。 The embodiment of the present invention also provides a thermal aggregate silo, including the above-mentioned aggregate sampling device.
本发明实施例还提供了一种沥青搅拌站，包括上述热骨料仓。 The embodiment of the present invention also provides an asphalt mixing plant, including the above-mentioned thermal aggregate bin.
本发明的实施例中的骨料取样装置，包括取样筒、螺旋输送叶片和旋转驱动装置，其中，取样筒一端设置有取样口，所述取样口伸入到热骨料仓的内部， 取样筒的一端固定在热骨料仓的侧壁上，在该固定端处设置有安装座，取样筒上设置有卸料出口，卸料出口处连接有卸料分支，螺旋输送叶片安装于取样筒的内部，用于将骨料输送至卸料分支处，螺旋输送叶片转轴的一端安装在所述安装座上，并与所述旋转驱动装置固定连接，所述旋转驱动装置用于驱动螺旋输送叶片的旋转。这样，可以增加取样深度，从而可以提高骨料取样的准确度，而且取样操作相对简便。另外，通过安装座的拆装，可以实现骨料取样装置的快速拆装，便于维护。 The aggregate sampling device in the embodiment of the present invention includes a sampling cylinder, a screw conveying blade and a rotary drive device, wherein, one end of the sampling cylinder is provided with a sampling port, and the sampling port extends into the inside of the hot aggregate bin, and the sampling cylinder One end is fixed on the side wall of the thermal aggregate silo, a mounting seat is provided at the fixed end, a discharge outlet is provided on the sampling cylinder, and a discharge branch is connected to the discharge outlet, and the screw conveying blade is installed on the sampling cylinder. Inside, it is used to convey the aggregate to the discharge branch, and one end of the rotating shaft of the screw conveying blade is installed on the mounting base, and is fixedly connected with the rotating drive device, and the rotating driving device is used to drive the screw conveying blade rotate. In this way, the sampling depth can be increased, thereby improving the accuracy of aggregate sampling, and the sampling operation is relatively simple. In addition, through the disassembly and assembly of the mounting seat, the aggregate sampling device can be quickly disassembled and assembled, which is convenient for maintenance.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。 The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.
Claims (6)
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| CN108116903A (en) * | 2017-12-28 | 2018-06-05 | 警通建设（集团）有限公司 | A kind of pitch hot aggregate storage bin, mixing station and producing process |
| CN108844769B (en) * | 2018-09-21 | 2020-08-25 | 云南通衢工程检测有限公司 | Quantitative indoor solid asphalt rapid heating and extracting system |
| CN118579545B (en) * | 2024-08-06 | 2024-11-08 | 连云港市宏琦电力辅机有限公司 | A coal powder sampler used in conjunction with a conveying device |
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