SU1458590A1 - Power support unit - Google Patents

Abstract

This invention relates to the mining industry, namely, to mechanized fortifications for coal seam cleaning. The purpose of the invention is to increase the reliability of work. This is achieved due to the controlled distribution of the resistance of the support section across the width of the space supported by the upper space, depending on the conditions, 11 supports are used during the period of its movement. Dp of this top to 1 snab /////////////////////////// /// Fi. wives with a vertical wall (BC) 9 rigidly fixed on the dam side with top 10, 11 and bottom 12, 13 pockets on the inside of the section. The base 2 of its zavalnoy part inclined toward the sun 9. In the lower pocket 13 of the EC 9 pivotally fixed the free end of the lever (P) 4, made in the form of a semicircular head. In the upper pocket 10, the free end of the control hydraulic cylinder (PG) 6 is fixed. The GU 6 is placed in the groove P 4. The P 4, GU 6 and hydraulic racks 5 are located in the longitudinal-axial plane of the support section. The lower pocket 13 of the BC 9 is made in the form of a T-shaped groove in which the head of the end of the P 4 is semicircular. The lining section is equipped with an OR valve and a reducing valve installed in the backwater mainline. The latter is connected through a safety-unloading unit to the rod cavity GU 6 and, through a return-unloading valve and OR valve, to the control cavity of the safety-unloading hydroblock of a hydroresistance. 2 hp f-ly, 5 ill. 15 19 .г .-. А 6 70 а W sd 00 SP with / 7 g G6

Description

The invention relates to mining, in particular, to structures of mechanized supports for longwalls of coal mines.

The purpose of the invention is to increase reliability by providing a controlled distribution of the resistance of the lining section across the width of the space supported by the upper space, depending on the conditions of the lining application and during the period of its movement.

Fig. 1 shows a mechanized support section, side view; figure 2 is the same, front view; figure 3 is a base view in the plan; na Fig.4 - the base of the broadened section, view in plan; in Fig. 5, the principle guide is an identical lining scheme.

The mechanized support section includes upper to 1, base 2, hydraulic cylinder 3 peredvilski, lever 4, hydraulic column 5 and hydraulic cylinder 6 of the control (Fig.) With safety - discharging hydraulic units 7 and 8, hydraulic control system (Fig.5).

The upper side of the bottom side is provided with a vertical wall 9. The latter and the base 2, having a slope of the upper surface G downward and rearward, are respectively made with the upper 10 and 11 and lower 12 and 13 pockets interconnected by the means of the lever 4 with the inner groove D and passing through this groove hydraulic cylinder 6 controls. The lugs 15 and 16 of the lever 4 and the lugs 17 and 18 of the hydraulic cylinder 6 controlling the horizontal hinges 19 and 20 are fixed: the lugs of the hydraulic control dial are in the lower pocket 12 of the base 2 and in the upper pocket 10 of the vertical 11, the wall 9 and the lever 4 in the upper pocket 11 base 2 and in the lower pocket 13 of the vertical wall 9 (Figs 1.3 and 4).

In order to ensure the adaptability of the top 1 to the roof (side turn), the bottom pocket 13 of the vertical wall 9 has a T-shaped groove 21 in which the busbar 22 is fitted with a semi-circular head B.. The eyelet 22 is connected to the eyelet 16 of the lever 4 by the hinge 20, which together forms a ball-type connection (FIG. 3 and 4).

The axial lines A-A in FIG. 2, B and B in FIG. 3 of the lever 4, the hydraulic legs 5 and the hydraulic cylinder 6 of the control in the horizontal

five

ten

15

20

25

thirty

35

40

45

50

55

tal and vertical planes coincide.

In order to increase the stability of the section due to its widening of the two-post section, the lining section is formed by mating single-post sections. In this case, the upper c (not shown in FIG. 4) and the base 23 are made common (FIG. 4).

The support control hydraulic system (Fig. 5) includes lines: pressure 24, drain 25 and backwater 26 with an adjustable pressure reducing valve 27. The backbone line 26 is connected via a return-discharge valve 28 and safety-discharge hydraulic units 7 and 8 to the cavity C of the control hydraulic cylinder 6, the piston cavity of the hydraulic rod 5 and the valve 29. The last lines 30, 31 and 32 are connected to the rod end of the hydraulic posts 5, control panel 33 and piston cavity pre-. additional safety hydraulic unit 7. Control control line 33 of control 33 is connected to cavity C of hydraulic cylinder 3 of the shifter, which is connected by lines 35 and 36 to the piston cavities of the reverse-discharge valve 28 and safety-unloading valve 8.

It is possible that the safety-discharge valve control, not shown in the diagram, may be installed in the cavity of the hydraulic cylinder 6 of the control and safety valve. The need to install it can be caused by a highly developed pressure from the roof to the back of the top. All other hydraulic equipment connections are carried out by known methods.

The support works as follows.

In all positions of the section, the lever 4 and the control hydraulic cylinder 6 ensure its longitudinal stability, and the ball connection of the lever with the vertical wall 9 of the top 1 ensures its adaptability to uneven roofing. At the same time, the control hydrocylinder 6 transfers the necessary forces of the required direction to the back of the top 1 and provides increased resistance to its cantilever. By knowing the nature of the distribution of the external load from the roof over the width of the developed lava space (the characteristic of the lava), adjusting the reducing valve 27 (Fig. 5). roof maintenance.

When the pressure in the rod cavity of the control hydraulic cylinder 6 (Fig. 5), which exceeds the pressure in the backwater mainline, a safety valve of the safety and discharge hydraulic unit 8 is activated.

Moving sections is carried out

an inclined surface, in the downhole and downhole parts on which the upper and lower pockets are hydro-, stand, upper, lever made with a longitudinal internal groove, one end of which is connected to the upper base pocket, control hydraulic cylinder connected at one end to lower pocket of the base, shifting hydraulic cylinder, hydraulic control system of the section with pressure, drain and supporting lines, control unit, safety-unloading

the rod cavity of the hydraulic cylinder 3 with 15 hydraulic blocks, back-loading, when the corresponding position on the remote control 33 is turned on. In this case, the safety-discharge hydraulic units 7 and 8 will open, the pressure from the back-up line 26 will fall into the piston cavity of the hydroresistant 5, i.e. lining section will go to re-; press support.

Backwater forces according to lava conditions

variable hydraulic units and back-unloading valves, characterized in that That, in order to increase the reliability of work by providing a controlled distribution of the resistance of the lining section across the width of the space supported by the upper space, depending on the conditions of use of the lining and during its movement.

are regulated. When the pressure in the mag- 25 is supplied to a rigidly fixed

If the backwater is close to the pressure in the pressure line 24 after shifting, the section can be left to perform the functions described above. With a significant pressure difference, the strut spacer should be made from the console 33.

Since the force of the hydraulic rack 5 exceeds the force of the hydraulic cylinder 6 of the control, the operation of the latter when moving the support and its thrust is subject to the nature of the hydraulic resistance of the rack, which provides favorable conditions for adaptability to the top of the roof.

The provided forced opening of the check valves of the safety-discharge hydraulic units 7 and 8 of the control hydraulic cylinder 6 and the hydraulic column 5 when the section is moved is caused by the possibility of pressure in the piston and rod cavity that exceeds the pressure in the backwater line 26.

Claims (2)

1. Section of mechanized support, including hydrorack, base with hydraulics, backwash variable hydraulic units and back-unloading valves, characterized in that That, in order to increase the reliability of work by providing a controlled distribution of the resistance of the lining section across the width of the space supported by the upper space, depending on the conditions of use of the lining and during its movement. on the bottom side of the vertical wall with the upper and lower pockets on the inner side of the section, the slope of the surface of the base portion of the base is directed toward the vertical wall, in the bottom pocket of which the free end of the lever is pivotally fixed, and in the top side - the free end of the control hydraulic cylinder, ,, g located in the groove of the lever, while the axis of the lever, hydraulic control cylinder and hydraulic racks are located in the longitudinal axial plane of the support section. 40 2. Section pop.1, characterized in that the end of the lever connected to the lower pocket of the vertical wall is made in the form of a semicircular head connected to the lever 45 flat hinge, located in the longitudinal section of the lining section, and the lower pocket of the vertical wall is made in the form of a T-shaped groove with a ball bearing located in the vertical plane, with the semicircular head placed in the T-shaped groove. 3, Section according to claims 1 and 2, that is, it is supplied so that it supplies55 an I-fflH valve and a reduction valve. the nominal installed in the main line of the backwater, which is connected through a safety-discharge hydraulic unit with the rod cavity of the hydraulic cylinder up514585906 through the return discharge engines, the valve and the OR control unit are connected to the cavity and to the control cavities to reverse the safety and unloading valve and safety hydraulic block of the hydraulic post, and to the hydraulic discharge block of the hydraulic control cylinder of the hydraulic control cylinder. lindra control. 1 21 20 23 74 VA 26 / 2 Editor M.Petrova Compiled by V.Ponomareva Tehred M. Khodanich. Proofreader V. But ha Order 342/39 Circulation 449 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 21 3 / / -, o 29 -C fie. S 28 -G eight Subscription