SU821705A1 - Power roof support control hydraulic system - Google Patents

Description

(54) HYDROSYSTEM OF MANAGEMENT OF THE MECHANIZED

STRONG

I

The invention relates to the mining industry, in particular to the fixing of bottom holes of mines 1x with unstable orodaz and can be used for mounting (a bottomhole assembly with no excavation).

Known pschroa councils Stem esh1Ya mechanized bolting comprising gadroschlindr rack gadrodomkrat peredvizhesh conveyor cylinder dispenser, the operating band kog0rogo.o cavity communicates with piston hydraulic line pschrodomkrata with pshrozamkom installed therein and a check valve and with the pressure line - gidrolishey with nonreturn valve, piston the cavity of the drip hole is connected to the pressure line by hydraulic line with a hydraulic lock and a check valve in series with the hydraulic valve and the check valve, with the drain line t. .

The disadvantage of this system is that to remotely control the pushing of the uprights to the conveyor, it is necessary to unload an even or odd row of uprights along the entire length of the lava (depending on which row is pulled up to the conveyor). It happens not

always safe and applicable only in fences with a stable roof and soil.

The purpose of the invention is pacurapeirae functionality and an increase in the reliability of the hydraulic system.

The goal is achieved by the fact that the hydraulic system is equipped with a three-pronged four-line hydraulic valve with control from a separate supply line and an additional non-return valve, with the pressure line and the hydraulic cylinder rod being connected to the outlets of the hydraulic distributor to drain the last / second through the additional non-return valve with a drain line.

The drawing shows a diagram of a hydraulically controlled roof support system.

Claims (1)

The hydraulic system contains a hydraulic cylinder 1 stand, hydraulic jack 2 movements of the conveyor 3, metering cylinder 4, the working cavity 5 of which is combined with the piston cavity 6 of the hydraulic jack 2 by hydraulic line 7 with the hydraulic lock 8 installed in it and non-return valve 9 and with the pressure line 10 - by hydraulic line 11 with reverse valve 12. The piston cavity 6 3 of the hydraulic cylinder 2 is in communication with the pressure line 10 by hydrolysis 13 with successively installed hydraulic lock 14 and the non-return valve 15, the rod cavity 16 is with the drain line 17 three-position four-line a second control valve 18, controlled from a separate control line 19, an additional non-return valve 20. The delivery pipe 10 and the rod cavity 16 of the hydraulic jack 2 are connected respectively to the outlets 21 and 22 of the hydraulic distributor 18, the drain 23 of the latter is connected via an additional non-return valve 20 to the drain line 17 , and the control valve 19 of the control valve 18 - with a control lock cavity 24 of the hydraulic lock 8. The trolley 25 connects the pressure raglah 10 through the hydraulic lock 26 with the piston cavity 27 of the hydraulic cylinder 1 of the stand and the hydraulic valve 28 connects the rod olost 29 of the cylinder 1 in a yield of 22 Hydrodistributor 18 Hydraulic zshravleni mechanized bolting operates as follows. Initially, the valve 18 is in the first position. When the pressure is supplied to the pressure line 10, it is transmitted through the hydraulic distributor 18 through the hydroline 25 through the hydraulic lock 26, the liquid enters the piston cavity 27 of the hydraulic cylinder 1 of the stand, and it expands between the roof and the soil of the lava. At the same time, the liquid from the pressure line 10 through the check valve 12 through the shdro line 11 enters the working cavity 5 of the inner section of the dispenser 4, moving its piston to the extreme position, thus preparing the step of moving the complex. Extruded from the metering cylinder 4, the liquid goes into the drain line 17. When this lock 8 is locked and the liquid in the hydraulic jack 2 does not flow. After the coal is removed from the bottom depth, the complex is moved. First, conveyor 3 is moved, the fluid being fed under pressure to the 17-second line; the seam, from which it enters the cylinder dispenser 4. At the same time, the fluid enters the control lock 24 of the hydraulic lock 8 and opens it. Displaced from the working cavity 5, the liquid through the open hydraulic lock 8, the valve 9, through the hydrolyzer 7 enters the piston cavity 6 of the hydraulic cylinder 2, moving the latter, the movement of which is transmitted to the conveyor section 3. Displaced from the internal cavity 16 of the hydraulic cylinder 2, the liquid leaves on plums. During the extraction of the conveyor 3 from the inlet, the liquid from the piston cavity 6 of the shroud 2 cannot be forced out, since the closed hydraulic lock 14 and the return valve 9 prevent this, i.e. regardless of the force applied to the conveyor 3, it does not change its position relative to the bottom. To move the pillars to the conveyor 3, pressure ke is fed to line 19 of the control. At the same time, the hydraulic distributor Itel 18, switching to the second position, connects the drain line 17 to the pressure line 10, and the last - to the output 22. At the same time, the fluid is supplied under pressure to the pressure line 10. The fluid through the hydroline 28 enters the rod cavity 29 the hydraulic cylinders 1 are strut and simultaneously opens the hydraulic lock 26, The stand is lowered and, displaced from the piston cavity 27 of the hydraulic cylinder 1 of the hydraulic strut 25 and the open hydraulic lock 26 escapes through the hydraulic distributor 18 and the check valve 20 to the drain. At the same time, the fluid enters the stock cavity 16 of the hydraulic cylinder 2 and to the hydraulic lock 14, opening it. In this case, the hydraulic jack 2 moves to the conveyor 3, the hydraulic cylinder 1 of the stand is pinched, and the displaced fluid from the piston cavity 6 of the hydraulic jack 2 through the hydraulic lock 14 and the check valve 15 leaves through the hydraulic distributor 18 and the check valve 20 to drain. Then, pressure is reduced, or vice versa, in control line 19. In this case, the valve 18 switches to the first position or to the corresponding third position and the cycle repeats. The control valves are adjusted so that the pressure of their inclusion in the second position does not match. At the same time, by supplying a certain control pressure, one or several racks connected to the hydraulic distributor can be separately seated and pushed to the conveyor in the control line of the hydraulic distributor without relieving the rest, which increases reliability of the mechanical support. Claims of the Invention Hydraulic control system of a mechanized lining, comprising a hydraulic cylinder of a stand with a hydraulic coupling of the conveyor, a cylinder cylinder, the working cavity of which is connected to the piston cavity of the hydraulic cylinder with a hydraulic line with a hydraulic lock installed in it and a non-return valve and a pressure valve that is connected to the piston cavity of the hydraulic cylinder with a hydraulic lock and a non-return valve and a pressure valve that is connected to the piston cavity of the hydraulic cylinder with a hydraulic lock and a non-return valve, and a pressure valve with a hydraulic valve with a hydraulic lock mounted on it and a non-return valve, a hydraulic valve with a hydraulic cylinder with a hydraulic lock and a non-return valve. with a hydraulic line with a hydraulic line with a successively installed hydraulic lock and reverse valve in it, a rod with a discharge line, I distinguish and in that, in order to expand the functional capabilities and increase the reliability of hydraulic system provided with a three-position four-way gadroraspredelitelem with control from a separate control line and an additional check valve, wherein the pressure line and stem cavity hydraulic jack associated with outlets distributor, the discharge of the latter is connected via an additional check valve with a drain line. Sources of information taken into account in the examination 1. USSR author's certificate in application no. 2678006/06, cl. E 21 D 23/16, 10/19/78.