SU726345A1 - Apparatus for controlling hydraulic mining of minerals - Google Patents

Description

(54) DEVICE FOR MANAGING HYDRAULIC FASTENERS

I

The invention relates to the mining industry and, in particular, to the fastening of the bottom of coal mines and is intended to control the bottomhole complex during deserted excavation.

A known system of centralized hydraulic or pneumatic control me-. shaft support, containing control panel, actuator cylinders, End position sensors, spool valves with dual drive, power source and power lines, where the spool actuator for a group of sections is connected to one control line, and the distributor for sections in the group is connected through distributor spool for the group with the second line. In the distributors for a group of sections, the spools are offset from each other by a stepping angle 1.

This device allows movement of both the section group and each section in the group, however, it does not ensure the movement of the entire downhole complex.

The closest to the invention according to the technical essence and the achieved result is a device for controlling hydraulic lining, including hydraulic jacks of conveyor movement, hydraulic rails, valve block with reverse and hydraulically controlled valve &

Its disadvantage is that the support section is moved by local control on each rack.

The aim of the invention is to provide remotely multiple discrete advancement of the downhole conveyor.

five

This goal is achieved by the fact that the device for controlling the hydraulic support has an additional supply line for the conveyor, which through a check valve and 6 is connected to the working cavity of the portioner, is connected to the control valve of the hydraulic distributor through the hydraulic controlled valve.

Claims (1)

On fkg. 1 is a diagram of a remote control hydraulic support system; , 3.72 in FIG. 2 - spool valve distributor. The device consists of four main pipelines 1-4 connected to a power source via a hydraulic distributor (not shown in the drawings). The length of the lava rack 5 are divided into two groups, with the racks of one group. Placed between the racks of the other. Racks 5 are connected with hydraulic jacks 6, the rod end of which is connected to the main pipeline 3 or 4, depending on the group of struts. The hydraulic cylinder rod 6 is connected to the conveyor 7. The hydraulic cylinder piston 6 is connected to pipeline 1 via a spool valve 8, in parallel with which is installed a valve block 9 containing a check valve 10 and a hydraulically controlled valve 11 with a fixed element 12. Valve block 9 is connected to the main 2 from the side of the check valve 10, the supply lines of the conveyor with pipelines 13 and 14, and from the side of the hydraulically controlled valve 11 with the piston 15, which is connected to the pipeline 2 through pipeline 14, the posts 5 have a hydrose 16. Hydro ki; a hydraulic circuit is coupled by means of conduits 13-15 and 17-21. In addition, the device has an additional conveyor supply line with pipelines 22 and 23, which through a check valve 10 communicates with the working cavity of the portions 15. The working cavity of the portionion 15 is connected in turn with the control valve 24 of the hydraulic distributor 8 through the hydraulically controlled valve 11.. Spool valve B consists of a housing 25, in which channel 26 is made. Inside spool 25, a spool 27 is placed, in which a check valve 28 is installed. The device operates as follows. When pressure is applied to line 1, it is transmitted through conduit 22 and 17 and hydraulic lock 16, through which fluid enters through conduit 19 to the piston cavity of stand 5, which is bursting between the roof and the lava soil. At the same time, fluid from the pipeline 22 of the conveyor supply line through the conduit wire 23 enters the valve block 9, presses the check valve 10 and fills the piston 15, Moving the floating piston to the front end position, which prepares the moving step of the complex. While the spool valve 8 is locked, and the liquid in the hydraulic jack does not flow. Once the coal is removed from the bottom to the depth of the flocne, the complex is moved. First, conveyor 7 is moved, for which liquid under pressure is supplied to trunk 2, from which it passes through pipeline 14 to conveyor control line 15 and simultaneously through pipeline 13 to valve block 9. At the same time, movable element 12 goes forward. The movable element 12, pressing with its end to the check valve 11, provides the path of fluid from the puschuner 15 to the spool valve 8. Under the pressure of the fluid coming from line 2 through pipeline 14, the piston of the piston 15 goes to the rear end position, moving the fluid through valve 11 to The input of the spool valve 8 and through its channel through the check valve 28 enters the piston cavity of the hydraulic jack 6, moving the piston to the forward position, the movement of which through the rod is transmitted to the conveyor section 7. l. displacing the pillars 5, pressure is supplied, depending on the group of pillars being moved, either to trunk 3 or to trunk 4 in turn. In this case, the fluid enters through the pipelines 21 and 18 into the hydraulic lock 16, from where it reaches the rod cavity of the rack 5 through the pipeline 20 and lowers it. At the same time, the fluid from the pipeline 21 enters the rod end of the hydraulic cylinder 6, mixing the cylinder of hydraulic cylinder to the conveyor 7, moves the stand by the step of entry and displaces the liquid from the hydraulic cylinder 4 through the spool valve 8. At the same time, the liquid received at the hydraulic distributor 8 from the side jack, moves the spool 27 until the input side of the rod end of the jack is communicated with an additional conveyor supply line, and then through the cavity 24 y The control of the hydraulic distributor, the liquid is discharged into the pipeline 1. Then the subshot pressure in the pipeline 1 and 1 pc is repeated. The invention of the device for controlling the hydraulic support, including hydraulic jacks of conveyor movement, hydraulic legs, valve block with reverse and hydraulically controlled valves, j hydraulic distribution valve, a portioner, the discharge cavity of which is connected to the supply line of the conveyor, in order to achieve remote control extension of the downhole conveyor, it has an additional conveyor supply line, which through the reverse