SU798292A1 - Planer set - Google Patents

Description

(54) STRING COMPLEX

one

The invention relates to the mining industry, in particular to equipment for mechanizing the excavation process.

A coal-mining complex is known, which includes a excavation device in the form of a combine, a conveyor, a support consisting of racks, mobile hydraulic jacks, a control unit, a pumping station, and pressure and drain hydraulic lines 1.

A well-known strutovy complex includes a plow installation, movement hydro-cylinders, a control unit, a pressure head and a drain hydromaterials 2.

A disadvantage of the known complexes is unreliability in operation.

The purpose of the invention is to increase the reliability of work.

This goal is achieved by the fact that the complex is equipped with an additional hydraulic main, which is connected via a safety valve to the drain main, and the piston cavities of the shifting hydraulic lines are connected through non-return valves with an additional main line.

FIG. 1 shows schematically a complex, a general view; in fig. 2 - principle hydraulic circuit of the complex.

The plow complex includes a plow installation 1, movement 2 pvdrocylindra with a common control unit 3, hydraulic landing posts 4, an individual support kit 5, a pump station 6, a high pressure hydraulic line 7, a drain line 8 and a pipeline 9 with a safety valve 10 to maintain the set ) pressure in hydraulic cylinders when shifting the conveyor.

The cylinders of the slide 2 are attached to the conveyor plates of the plow installation 1, and on the other hand, each cylinder is hinged to the hydraulic rack 4. The check valve 11 isolates the line 9 from the drain line 8, i.e.

eliminates the possibility of low pressure relief during the operation of the plow installation through the piston cavity of any hydraulic cylinder, the distributor of which is installed in the neutral position.

37982

Plow complex works as follows.

The pump station 6 is turned on, and the working fluid is supplied to the pressure line 7 through common control units 3 to the piston cavities of the sliders 2, which press the conveyor belt of the plow unit to the bottom of the chest during coal mining. At the same time, the required low working pressure is maintained by the safety valve 10. After the removal of the coal strip, which is equal in size to the movement of the shifting hydraulic cylinder, all the valves of the control units 3 are set to the neutral position.

By means of the control units 3, alternately unloading, shifting and spreading the hydraulic landing pillars 4 are performed. At the same time, the high pressure required for unloading, shifting and expanding the hydraulic landing pillars is maintained by the pressure reducing valve of the pumping station. Thereafter, the handles of the control units 3 are set to the position of shifting the conveyor belt, and the cycle is repeated. Due to the presence of the line 9 with the safety valve 10, the possibility of supplying the conveyor rod of the plow complex to the face by high pressure is excluded. This eliminates breakage and overturning of the conchUUHCHUUH HUH UUAU / UCHU / X UUA UUH X / U: U / UU / x UUH UUH U / AUUH UH /

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fan set, which can lead to accidents and injury to obsteering personnel located next to the shifter 2.

This structure significantly increases the reliability of the plow complex in operation.

Formula of the invention

A plow complex including a plow installation, movement hydraulic cylinders, a control unit, a pressure and discharge line, characterized in that, in order to increase the reliability of operation, it is provided with an additional hydraulic main connected through a safety valve to the drain line, and the piston cavities of the shifting cylinders are connected through check valves with additional line.

Sources of information taken into account in the examination

1. Machines and equipment for coal mines. Ed. V.N. Khorina, M., Nedra, 1974, p. 36

2. Yatskikh VG and others. Mining machines and complexes. M., Nedra, 1974, p. 313-314.

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Fig, 2.

Claims (1)

Claim The plow complex, which includes the plow installation, movement hydraulic cylinders, control unit, pressure and drain line, characterized in that, in order to increase the reliability of operation, it is equipped with an additional hydraulic line connected through a safety valve to the drain line, and the piston cavities of the movement hydraulic cylinders are connected through check valves with an additional line.