SU1317148A1 - Power support unit - Google Patents

Abstract

The invention relates to mining and is intended for use in mining cleaning mechanized complexes. The goal is to increase the efficiency of the mechanized support by providing a guaranteed initial spread of the hydraulic post with a pressure exceeding the pressure in the pressure line. For this section 2 "has a choke 22 connected between the rod cavity of the jack (D) 4 of the shield 3 of the fence and the drain line 15. The rod of the cavity D 4 is connected to the valve valve 5 of the stand block 7, through which it communicates with the piston cavity of the hydraulic rack 6. The hydraulic distributor (ГР) 13 is made with the possibility of blocking the hydraulic post of the hydraulic post 6. At the end of the preliminary expansion of the hydraulic post 6 carried out by switching on the GR 13 to the position, the shield 3 is advanced. For this, the GR 13 is installed in the floor o The working tank from the pressure line 14 enters the control cavity of the check valve 20 of the hydraulic unit 19, opens it, and through the check valve 17 of the hydraulic unit 16 goes into the piston cavity D 4, moving it apart. The fluid displaced from D 4 enters the piston cavity of the hydraulic bridge 6, producing additional space. 1 sludge. (L DO i (00

Description

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The invention relates to mining and is intended for use in mining cleaning mechanized complexes.

The purpose of the invention is to increase the efficiency of mechanized roof support by providing a guaranteed initial spreading of the hydrorack with a pressure exceeding the pressure in the pressure line.

The drawing shows the proposed section mechanized lining.

The mechanized lining section contains an overlap 1, a visor 2, a shield, 3 fences, controlled by a jack 4, a jack 5 that holds the visor from tipping over, a hydraulic post 6 with a rack 7, consisting of a one-way hydraulic lock (check valve) 8 and a safety valve 9, a movement jack 10, a control valve 13 pivotally connected to the base 11 and the conveyor 12, a pressure head 14 and a drain 15 line, a hydraulic unit 16 consisting of a check valve 17 and a safety valve 18, a hydraulic unit 19 ,. consisting of check valve 20 with two pushers and safety valve 21 and throttle 22.

The delivery line 14 is connected via a hydraulic distributor 13 to the control cavity of the check valve 20 of the hydraulic unit 19 and to the valve valve above the valve valve 17, through which it communicates with the piston cavity of the jack 4. The iilTO cavity of the jack 4 is connected through the hydraulic block 19 to the plug 23 and with the control cavity of the check valve 17, as well as with the over-valve cavity of the hydraulic lock 8 of the column block 7, through which it communicates with the slug cavity of the hydraulic rack 6 and through the throttles of the drain trunk 15. Chtrkova olost gidrostoyki 6 is connected with cavity 8 and controlling hydraulic lock by Hydraulic distributor 13 with the drain line 15.

Section mechanized lining works as follows.

After the movement of the securing section of the jack 10, the hydraulic post 6 is pre-distributed by turning on the hydraulic distributor 13 to position b. The fluid simultaneously enters through the hydraulic unit 19 in the rod

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the cavity of the jack 4, which in accordance with the technological scheme of work is reduced, and through the post block 7 into the piston cavity of the hydraulic post 6, carried it out. In this case, the working fluid displaced from the rod cavity of the hydraulic column 6 through the valve 13 enters the drain line 15.

At the end of the pre-thrust of the hydraulic post 6, the 1-stroke 3 gate 3 of the fence into the working position is produced, for which the control valve 13 is set to position a. When this working fluid from the pressure line 14 enters the control cavity of the check valve 20 of the hydraulic unit 19, opening it, and through the check valve 17 of the hydraulic unit 16 into the piston cavity of the jack 4, pushing it. Since the over valve valve of the check valve 20 of the hydroblock 14 is connected to the valve 23 and the valve valve above the valve of the hydraulic lock 8 of the post hydroblock 7, the displaced working fluid from the rod cavity of the jack 4 through the open check valve 20 of the hydroblock 19 and the rack unit 7 enters the piston cavity of the hydraulic post 6, producing its additional distribution.

Consequently, when the jack 4 is moved apart, a pressure in excess of the pressure of the piston cavity is created in its rod cavity, this increase is proportional to the ratio of the working areas of the piston and rod cavities. This ensures guaranteed pressure of the initial thrust.

The excess fluid coming from the rod cavity of the jack 4, in the process of separation of the hydraulic 6 through the throttle 22 enters the drain line 15.

The safety valves 18 of the hydroblock 16 and the valves 21 of the hydroblock 19 respectively control the pressure in the piston and rod cavity of the jack 4 when external loads occur on the pin 3 of the fence,

In the case of using mechanized roof supports in the openings with a weak roof, which does not require a higher initial thrust, the shield of the guard is moved to the working position by switching the hydraulic distributor 13 to the position g. Working fluid

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from the pressure line 14 through the hydraulic distributor 13 enters the control cavity of the check valve 20 of the hydraulic unit 19, opens it, and through the check valve 17 of the hydraulic unit 16 into the piston cavity of the jack 4 (pushing it out. Displaced the working fluid through the open return cavity 4 of the jack 4) the valve 20 and the valve 13 enters the drain line 15.

To reduce the jack 4, the valve 13 is set to position b. The working fluid from the pressure line 14 enters the control cavity of the check valve 17 of the hydraulic unit 16, opening it, and through the check valve 20 of the hydraulic unit 19 into the rod cavity of the jack 4, reducing it. At the same time, the working fluid enters the over-valve cavity of the hydraulic lock 8 of the post block 7, but since the pressure in the piston cavity of the hydraulic post 6 of the pressure in the pressure line is due to the additional load and the rock load, the lock 8 remains closed.

The working fluid displaced from the piston cavity of the jack 4 through the open check valve 17 of the hydroblock 16 and the hydraulic distributor 13 enters the drain line 15.- The lining section is reduced by placing the hydraulic distributor 13 to position c. In this case, the working fluid from the pressure line enters the rod cavity of the hydraulic column biv

Compiled by V. Ponomarev. Editor M. Pitkina Tehred A. Kravchuk Proofreader S. Cherni

2402/29

Circulation 454Subscribe

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, 4.

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5 0 5

about

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484

the control chamber of the hydraulic lock 8 of the rack block 7, opening it. Displaced at the same time from the piston cavity of the hydraulic 6, the liquid enters the drain line 15.

Claims (1)

Invention Formula The mechanized support section, which includes a visor, a hinge connected to the ceiling and a fencing shield, a hydraulic post, installed between the ceiling and the base, the piston cavity of which is connected to the safety valve and a one-way lock, a roof retaining jack connected to the ceiling, a fence of the barrier, A hydraulic distributor with a goat, the outlets of which are connected to the pressure and discharge lines, and one of its outlets is connected to the piston cavity of the hydraulic post through One line and one-way lock, characterized in that in order to increase the efficiency of the lining by providing a guaranteed initial spread pressure, which exceeds the pressure in the pressure line, it is equipped with a throttle connected between the rod end of the fence shield jack and the drain line, and the stem cavity of the jack the guard panel is connected to the hydraulic post of the hydraulic post, and the hydraulic distributor is designed so as to overlap the hydraulic post of the hydraulic post.