SU889846A1

SU889846A1 - Arrangement for fensing the near-face area for header operation

Info

Publication number: SU889846A1
Application number: SU802893663A
Authority: SU
Inventors: Сергей Егорович Афанасьев; Анатолий Дмитриевич Бондаренко; Георгий Александрович Гиршович; Михаил Яковлевич Меределин
Priority date: 1980-03-13
Filing date: 1980-03-13
Publication date: 1981-12-15

Description

(54) УСТРОЙСТВО ОГРАЖДЕНИЯ ПРИЗАБОЙНОГО ПРОСТРАНСТВА ДЛЯ ПРОХОДЧЕСКОГО КОМБАЙНА(54) DEVICE FOR ENCLOSURE OF THE WRENCH SPACE FOR THE PASSAGE COMBINE

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изобретение относитс к горной промышленности и может быть использовано дл снижени запыленности воздуха при добыче полезных ископаемых и проведении подготовительных выработок.The invention relates to the mining industry and can be used to reduce the dustiness of the air during the mining of minerals and the conduct of development workings.

известно устройство ограждени призабойного пространства дл проходческого комбайна, включающее экранирующие щиты и средства, предотвращающие распространение пыли по выработке 1.A device is known for securing the near-wellbore space for a roadheader, including shielding panels and means preventing the spread of dust along the excavation 1.

Недостатком устройства ограждени призабойного пространства вл етс его мала надежность и эффективность.A disadvantage of the device for enclosing the bottom hole is its low reliability and efficiency.

Наиболее близким решением по технической сущно.сти и достигаемому результату к изобретению вл етс устройство ограждени призабойного пространства дл проходческого комбайна, включающее щит, выполненный из призабойного диска с эластичным уплотнением и дополнительного диска. При работе проходческого комбайна запыленный воздух отсасываетс вентил тором из призабойного пространства за щитом, предотвраща выход пыли в выработку 2.The closest solution to the technical essence and the achieved result to the invention is the device for enclosing the bottomhole space for a heading machine, including a shield made of a bottom face disc with an elastic seal and an additional disc. During operation of the tunneling machine, the dusty air is sucked off by the fan from the bottom-hole space behind the shield, preventing dust from entering the generation 2.

Недостатком указанного устройства вл етс то, что по мере движени проходческого комбайна дополнительным эластичным уплотнением мелкие фракции горной массы и пыль счищаютс со стенок выработки, образу по всему контуру валик из тонкодисперсных фракций, который из-за больщогоThe disadvantage of this device is that as the tunneling machine moves, additional elastic compaction of the rock mass and dust is scraped off the walls of the excavation, forming a roller of fine fractions along the entire contour, which is due to

J разрежени между эластичными уплотнени ми взвихр етс воздухом, отсасываемым через неплотности между стенкой выработки и дополнительным эластичным уплотнением , и уноситс в тканевый фильтр. Одновременно этот валик пыли увеличиваетJ The vacuum between the elastic seals is swirled with air, sucked through the leaks between the wall of the excavation and the additional elastic seal, and is carried to a fabric filter. At the same time, this dust roller increases

10 сопротивление движению воздуха (особенно при больших количествах пыли) через зазор между дополнительным уплотнением и стенкой выработки, вследствие чего резко увеличиваетс количество воздуха, отсасываемого из-за щита, что приводит к10 resistance to air movement (especially with large amounts of dust) through the gap between the additional seal and the wall of the excavation, resulting in a sharp increase in the amount of air sucked from the shield, which leads to

5 увеличению поступлени пыли из зоны разрушени в тканевый фильтр. В результате этого из-за щита отсасываетс намного больщее количество пыли, превышающее содержание ее в воздухе при неработающем пылеотсосе.5 to increase the entry of dust from the destruction zone into the fabric filter. As a result, a much larger amount of dust is exhausted from the shield, exceeding its content in the air when the suction unit is not operating.

Claims

The aim of the invention is to increase the efficiency of dust collection while reducing the dust content of the aspirated air. This goal is achieved by the fact that the additional disk has an external pipe and the bottom-hole disk has an internal pipe with a control valve installed in the external pipe of an additional disk, which has a peripheral part along its perimeter that forms a trough-shaped profile on the side of the bottom-hole disk, while its external the surface along the axis is made of a variable cross section that increases towards the bottom hole disc, which forms a narrowing annular channel for the flow of oncoming air with the production wall. FIG. I shows the device for enclosing the space for the tunneling machine; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the node I in FIG. 2, a face-bottom disc with an elastic seal and an additional disc with a peripheral part. The device for enclosing the bottomhole space of the heading machine comprises a shield 1 and an elastic seal 2 fixed on it along the contour of the working out. The shield 1 consists of a bottom hole disc 3 and an additional disc 4, made with internal 5 and external 6 nozzles. The inner nozzle 5 is installed on the face-hole disc 3, the outer nozzle 6 is on the optional disk 4. In order to regulate the amount of air sucked from the bottom hole, the inner nozzle 5 has a control valve 7 with trunnions 8 and 9, a pivot arm 10 and a lock The position of P. The outer radial dimensions in the additional disc 4 are smaller than the radial outer dimensions B of the face-boring disc 3 with an elastic seal 2. The additional disc 4 has a peripheral portion 12 located obliquely and alternately m axial distance L from the face-to-face disk 3, forming a trough-shaped profile, while with distance from the longitudinal axis of the combine and generation, the distance L decreases. The outer surface 13 of the peripheral part 12 is made along the axis of the variable-width variable-to-hole disc 3 section, which forms a narrowing annular channel 14 with the wall of the outlet for the flow of oncoming air. Before turning on the fan, the control valve 7 is set to a position with the help of the pivoting lever 10 and the retainer 11 in order to suck out the required amount of dusty air from the bottom hole. Fresh air enters the bottomhole space through leakages in the shield and along the conveyor channel to unload the broken rock mass. Since the vacuum in the bottomhole space is small, a part of the dusty air is displaced from the bottomhole space by the gap between the working wall and the elastic seal 2 under the action of rotating units (gearbox and cutting disks) of the actuator. The displaced dusty air is pressed by the opposing air flow through the annular channel 14, and is directed into the space between the bottom-hole 3 and the additional 4 discs of the shield 1, then through the outer nozzle 6 together with the air sucked from downhole space through the inner pipe 5, to the fan and the dust collector. Since it is external: the core 13 forms an annular channel 14 of an oncoming airflow of variable cross section. The fine fractions of the rock mass during the movement of the combine are not delayed by the additional disk 4 and thus do not increase the dust content of the air entering the dust collector. The fabric filters used in the tunneling machine to capture dust are less polluted, which increases their service life. Thus, the proposed device improves dust collection efficiency. Claims The device for protecting the bottomhole space for a roadheader, comprising a shield made of a facehole disc with an elastic seal and an additional disc, characterized in that, in order to increase the dust removal efficiency while reducing the dust content of the aspirated air, the additional disc has an external nozzle, and a bottom hole disc and Has an internal branch pipe with a regulating valve installed in the external branch pipe of an additional disk, which has a peripheral ch st forming a trough-shaped profile with it from the face opening disc, and its outer surface is formed along the axis AC uvelichivayuschegos to prizaboyno.mu drive section forming with the wall making tapered annular passage for flow of oncoming air. Sources of information taken into account in the examination 1.Patent of Germany No. 2156281, cl. 5e 35/22, published. 1972.

2. Authors certificate of the USSR Ho 318694, cl. E 21 C 35/22, 1969.

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