SU1652601A1 - Hydraulics of powered support - Google Patents

Abstract

The invention relates to the management of the roof and fastening of the mining faces, which work according to a one-sided scheme of coal extraction and shifting of mechanized lining. The goal is to increase the reliability of supporting the roof by increasing the initial thrust of the hydraulic rails without additional power consumption by the O5 pump station the cylinder with the piston, forming the rod I and piston 2 cavities (P), the hydraulic lock 3 and the safety valve (K) 4 The safety output K 4 is connected to the piston channel 5, and the hydro output head 3 - with an input of an additional controllable K 6 and a high-pressure hose 7 connected via a return K 8 to a piston P 2 HS of the adjacent previous section An additional control K 6 is controlled through the throttle device 9 from the rod end 10, and its output is connected with piston channel 5 At the end of the operating cycle of the hydraulic fluid, the working fluid is fed through the rod channel 10 into its rod stem P 1. At the same time, the hydraulic valve locks 3 and the working fluid of increased pressure from the piston piston P 2 through it and the reverse K 8 postchp on i-high pressure head AVU piston 7 II 2 adjacent construction previously moved and raspertoy pressure pumping stations The result is a layer of Vyshen initial thrust of the heavy yl 1C 1 5 0 5 (C (/

Description

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The invention relates to the management of the roof and fastening of the working faces, which work according to a one-sided scheme of coal extraction and shifting of mechanized supports.

The aim of the invention is to increase the reliability of maintaining the roof by increasing the initial spread of the girders without additional energy consumption by the pumping station.

The drawing shows a schematic diagram of a mechanized hydraulic support system.

The hydraulic system of powered roof supports consists of the same type of hydroelements. The hydraulic post includes a rod 1, a piston 2 cavity, a hydraulic lock 3 and a safety valve 4, the inputs of which are connected to the piston 2 cavity, the output of the safety valve is connected to the piston channel 5, and the output of the hydraulic lock 3 to the input of the additional control valve 6 and the high-pressure sleeve 7, connected through a non-return valve 8 to the piston 2 cavity of the hydraulic post adjacent the previous one (with respect to the direction of the order of shifting sections) sections.

The additional control valve 6 is controlled through the throttle device 9 from the rod 10 channel, and its output is connected to the piston 5 channel.

Hydraulic mechanized lining works as follows.

After the expansion of the hydraulic rack under the influence of rock pressure in its piston 2 cavity, the pressure of the working fluid increases. At the end of the working cycle of the hydraulic column, the working fluid is fed through the rod 10 channel into its rod 1 cavity. In this case, the hydraulic lock 3 and the pressurized working fluid from the piston 2 cavity are actuated through it and the check valve 8 flows through a flexible high-pressure hose 7 into the piston 2 hydrorack of the adjacent previous section (relative to the direction of the section shifting) section previously moved and unstressed pumping station. As a result, there is an increase in the initial thrust level of this hydraulic post.

After a part of the fluid from the piston 2 cavity of the hydraulic post is consumed

At the next hydraulic column, the valve 6, which is controlled through the throttle device 9, is actuated, and the working fluid from the piston 2 cavity through the piston channel 5 enters the drain. There is a landing rack. After shifting the support, the hydraulic post is pressurized by the pressure of the pumping station, then it is released when the next, unloading next (with respect to the order of section advancement) section of the support is unloaded and the cycle repeats.

In the drawing, the order of moving the sections is shown from right to left; in this case, each section is divided from the adjacent section located on its right.

The proposed hydraulic system can also be implemented in mechanized supports, having several rows of hydraulic legs across the width of the bottomhole space for each row individually.

Introduction of the proposed hydraulic system

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will allow to increase the reliability of maintenance of the roof in the clearing holes by increasing the initial thrust without additional energy consumption of the pump station, which will reduce the accident rate and increase coal production.

Claims (1)

Invention Formula The hydraulics of mechanized roof supports includes hydraulic racks consisting of a cylinder with a piston, a hydraulic lock and a safety valve, the inlet channels of which are connected to the piston cavity, and the outlets are connected to the piston channel, in order to increase the reliability of maintaining the roof by increasing the initial expansion without gidroeek additional power consumption of the pump station, each hydraulic post is supplied with an additional valve controlled from the rod channel by means of a throttle device and a check valve, while the hydraulic lock outlet is connected to the inlet of the additional control valve and the check valve inlet of the adjacent previous hydraulic post, the outputs of the additional control and check valve are connected to the piston channel and the piston cavity of the hydraulic post, respectively, and the check valve inlet is connected to the hydraulic lock outlet of the next subsequent hydraulic rack.