SU1333775A1 - Hydraulic system of power drift support - Google Patents

Abstract

The invention provides a reliable fastening of the drift during the plane-parallel movement of the upper base of the lining with preservation of stability during expansion when the ground and roof uneven, In the communication line of the distributor of the error block 14 of one of the hydraulic posts (HS) with rodless 13 20 33 5123 39 S (/

Description

Additional hydraulically operated two-position four-line distributors (P) 25, 26 are installed through a series of successively connected pressure valves 27, 28 and an additional flow divider 30, HS-free cavities communicated with

one

The invention is intended for use in the mining industry and relates to devices for automatically controlling sections of engineered supports with an upper base to ensure their stability during expansion in conditions of soil and roof unevenness.

The purpose of the invention is to secure the fastening of the drift when the upper base of the support lays parallel to the plane while maintaining stability during strut,

FIG. a schematic of the hydraulic system is presented; Fig. 2 is a structural diagram of the hydraulic control system; Fig. 3 shows the lining section; Fig. 4 shows a lining section with uneven ground; Fig. 5 shows the position of the section with the simultaneous extension of the girders; 6 shows the position of the section without an automatic control device.

The hydraulic device includes hydraulic racks J and 2 with support points 3 and 4, connected with overlapping of the lining section by means of the crossbeam 6, rack-mount hydraulic units 7 and 8 with safety and discharge valves 9, 10 and J-1, 12 , the control unit 13 for hydraulic legs 1 and 2, the control error synchronization unit 14 for hydraulic legs 1 and 2, interrogation units 15 and 16, comparison unit 17, synchronization units 18 and 19, drain units 20 and 21.

Synchronization mismatch unit 14 consists of two controllable valves 22 and 23, a valve 24 with an OR function. Blocks 15 and

The 16 interrogations are controlled distribution valves 25 and 26, the Block

The comparison consists of two control valves 27, 28, R 25, 26 and, through the OR 24 element, with control lines R 22, 23 of the block 14. The hydraulic system can be used. installed on several pairs of HS lining the interface of the lava with the drift and controlled by a single control unit 13. 6 Il.

control valves 27 and 28, the Sync blocks 18 and 19 are flow dividers 29 and 30, Drain blocks 20 and

21 consists of blocks 31 and 32 of valve and check valves 33 and 34,

The synchronization error block 14, blocks 15 and 16, block 17 are installed between blocks 48 and 19 and are included in hydrolines 35, 36 and 37, 38 between hydraulic blocks 7 and 8 of hydraulic posts J and 2 and flow dividers 29 and 30. The device is equipped with a safety valve 39,

There are hydrolines 40-52, Hydrolines 40 and 41 connect controlled distributors 22 and 23 of timing synchronization unit 14 with controlled distributors 25 and 26 of blocks 15 and 16, the second outputs of distributors 22 and 23 are connected with hydraulic lines 40 and 41 to the first inputs distributors 25 and 26,

The device is connected to the pressure and drain line m 53 and 54.

Several hydraulic systems (pressure and drain) lines 55 and 56 can be connected to block 13.

The hydraulics of the mechanized roof support works as follows.

In the course of expansion of hydraulic racks 1 and 2, the liquid enters through line 53 through the flow divider 29 along hydraulic lines 36 and 38, controlled distributors

22 and 23 of the block 14 mismatch on the hydrolines 35 and 37, the discharge valves 11 and .12 into the rodless cavities of the hydraulic posts 1 and 2 and pushes the hydraulic legs 1 and 2, during this time the synchronous movement of the hydraulic posts 1 and 2 with the support points 3 and 4 takes place from the sections of the lining to the soil production,

In this case, the top base of the section, until the soil touches the supporting points 3 and 4, is located on the transverse beam 6 of the open section.

In uneven soil, as soon as one of the support pts 3 or 4, suppose n 3 of hydroresistant 1, reaches the soil, the pressure in the headless cavity of this hydrostatic increases .1, The increased pressure in hydrolines 35, 42 and 43 through valve 24 switches both controllable valves 22 and 23 to the second operating position, opening access to fluid flows from pressure line 53 to hydraulic line 46 via hydraulic lines 40 and 41 through controllable valves 25 and 26 of polling unit I5 and 16, hydraulic lines 47 and 48 to hydraulic legs and 2. Controlled distributor 25 of polling unit 15 It is in the second operating position, since in the rodless cavity of the hydraulic post 1 and in the hydroline 35, the pressure increases from touching the supporting heel 3 of the soil. At the same time, the valve 27 of the comparison unit 17 opens. The controlled distributor 26 is in the first working position and the fifth 4 of the hydraulic post 2 continues to move toward the ground until the contact of the fifth soil occurs. After getting contact with the soil of the supporting point 4, the controlled distributor 26 of the polling unit 16 switches to the second operating position, and the flow to the fluid through the hydroline 48 to the hydraulic post 2 will stop. At the same time, the valve 28 of the comparison unit 17 opens. Fluid flow through hydrolines 46 and 50 through comparison unit M is directed to the second division of flow 30 of synchronization unit 49. From splitter 30, flow of liquid flows through hydrolines 51 and 52 are directed to hydraulic racks 1 and 2, the latter continue to move apart synchronously, lifting the upper base, i.e. at this moment, the plane-parallel movement of the upper base of the support section begins. The overlapping section, the lining, having received contact with the roof of the excavation, securely secures the excavation.

The overpressure is discharged by the safety valve 39 into the drain line 54. The hydrostation 2 and the fifth four enter into operation in the same way. When unloading one of the sections, the working fluid is fed along line 54

ten

15

20

25

thirty

35

40

45

50

55

Steps into the rod end of the hydraulic racks 1 and 2, the fluid from the rodless cavities, the thrusting circuit, through the unloading valves 11 and 42, the drainage blocks 20 and 2J on the line 53 go to the drain.

I

The proposed device may

to be installed on several pairs of hydraulic posts of the lava interface with the drift and to be controlled by one control unit I3 (hydraulic distributor) by means of lines 55 and 56.

Claims (1)

Invention Formula The hydraulics of the mechanized liner supports, and the hydraulic rails with support points, the upper base in the form of overlap, the discharge and discharge lines connected through the valve with rodless and rod cavities of each hydraulic rack, the flow divider through which the valve is connected with rodless cavities hydroracks, misalignment unit, made in the form of an OR logic unit and hydraulically controlled two-position four-line distributor installed in the communication line of the rodless cavity flow divider with the possibility of communicating the rodless cavity of another hydrorail with the outlet of the hydraulic distributor connected to the inlet of the flow divider, and two pressure valves, characterized in that, in order to secure the drift when the plane-parallel support moves along the thrust side while maintaining stability during thrust The device is equipped with an additional flow divider and two additional hydraulically controlled two-position four-line distributors, each of which is installed in the communication line The unit of the mismatch of one of the hydroelectric racks with the rodless cavity of the hydroracks through the pressure valves connected in series and an additional flow divider, and the rodless cavity of each of the hydroracks connected with the control lines of one of the pressure valves, the additional distributor and through the logic element OR with the control lines of the valve distributors . 777 fi & .З FIG. fpu &. five Fi.b Editor A.Dolinich Compiled by A. Volkov Tehred L, Serdyukov Proofreader B, Girn K Order 3933/27 Circulation 454 Subscription VNIIPI USSR State Committee for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab ,, d, yu4 / 5 Production and printing company, Uzhgorod, st. Project, 4