CZ277889B6 - Hydraulic circuit arrangement of mechanical support stabilization - Google Patents

Abstract

This hydraulic circuit arrangement for stabilising the mechanical mine support consisting of a control block (1), the control module (11) of which, along with the controllers (12), is connected to the pressure branch (2) and to the output branch (20), double cock (9) and the hydraulic cylinders (6, 7, 8) has a control block (1) in the controlled section of the support. The branch (4) connecting the control module (1) to the piston-rod space (32) of the movable cylinder (3) is connected to the double check valve (5) with a logical OR function which, at the same time, is also connected to the controller (12). Between the double check valve (5) and the right stabilisation cylinder (6), left stabilisation cylinder (7) and the thrust cylinder (8) there is a double cock (9). The piston-rod spaces (61, 71, 81) of the cylinders (6,7,8) are mutually hydraulically coupled and connected directly to the controller (12).<IMAGE>

Description

Connection of hydraulic stabilization of mining mechanized reinforcement

Technical field

The invention relates to the connection of a hydraulic stabilization circuit in a section of mine mechanized reinforcement, in particular with an automated control.

BACKGROUND OF THE INVENTION.

It is known to connect a hydraulic circuit for controlling the mechanized reinforcement consisting of an actuator, a control block and individual hydraulic cylinders. The control actuator is located in an adjacent section of mechanized reinforcement and a multi-channel hose is connected to it by means of a control block located in the actual section of mechanized reinforcement. Individual hydraulic cylinders are connected to the control block. The control of individual hydraulic cylinders is always controlled from only one adjacent section, either upper or lower. In the case of reinforcement with electrohydraulic control, stabilization is usually controlled from its own section, because there is no hydraulic connection between adjacent sections to control the appliances. This deteriorates operator safety and makes it impossible to operate at a larger incline. When the stabilization control is performed from an adjacent section, additional electrohydraulic actuators are connected, which greatly complicates the control system and increases the power requirement of the control device.

SUMMARY OF THE INVENTION

The above-mentioned disadvantages are eliminated by the connection of the hydraulic circuit of the stabilization of the mine mechanized reinforcement, consisting of the control block, whose control module and the actuator are connected to the pressure and waste branch, the double cock and the hydraulic cylinders. It is an object of the invention that the control block is located in the controlled reinforcement section. A twin check valve with logic function or is connected to the branch connecting the control module to the piston rod space of the transfer cylinder and is also connected to the actuator. A double tap is inserted between the double check valve with logic function OR and between the stabilization cylinders and the push cylinder. The piston rod spaces of the at least one stabilizing roller and the push roller are hydraulically connected to each other and connected directly to the actuator.

The main advantage of the wiring according to the invention is the possibility to control the stabilization during the automated section moving cycle. The shifting cycle is accelerated because the stabilization is performed automatically without the need for operator intervention. Another advantage is the possibility of automated control in a larger incline.

Overview of the drawings

The drawings show hydraulic diagrams of two examples of wiring according to the invention. Fig. 1 shows the basic connection which allows the connection of two stabilization rollers and one push-off roll. Fig. 2 shows a variation of the wiring which allows one stabilizing roller and the push roller to be connected at the same time.

DETAILED DESCRIPTION OF THE INVENTION

The connection of the hydraulic stabilization of the mining mechanized reinforcement according to the invention consists of a control block 1, which is located directly on the controlled section of reinforcement, to which two components, the control module 11 and the control 12, are connected pressure line 2 and waste branch 20 . A piston chamber 31 and a piston chamber 32 of the transfer cylinder 2 ' 4 are connected to the control module 11, connecting the control module 11 to the piston chamber 32 of the transfer cylinder 3, a double check valve 5 with logic function or connected to the actuator. 12. A double tap 9, consisting of two ball valves 91, is interposed between the double check valve 5 with logic function or and between the stabilizing rollers 6, 7 and the pushing roller 8. The piston chamber 61, 71, 81 of the right stabilizing roll 6, the left stabilizing roll 7 and the push roll 8 are interconnected and connected directly to the actuator 12.

The hydraulic circuit according to the invention operates as follows:

When moving the section, the fluid from the control module 11 is led into the piston rod space 32 of the transfer cylinder 3 and at the same time to the stabilization circuit. It passes through the orifice 51 to a double check valve 5 with a logic function or further to a double tap 9 where it is divided into two branches. In the first exemplary embodiment of Fig. 1, it divides into the left stabilizing cylinder branch 2 ^{and the} depressurizing roller 8 and the right stabilizing cylinder branch 6. In the second exemplary embodiment, in Fig. 2, the liquid is divided into the left stabilizing cylinder branch 7 and the branch of the push roll 8. Furthermore, in both embodiments, the stabilization circuit is also connected to the actuator 12, which allows the stabilization to be controlled from the section itself if necessary. The stabilization mode is set by means of the double cock 9. In the first embodiment according to FIG. 1, the stabilization is disconnected - both ball valves 91 are closed, one stabilization branch is connected - left stabilization cylinder 7 and depressurizer 8, second stabilization branch is connected - right the stabilizing cylinder 6 or the connection of both stabilization branches. In the second exemplary embodiment of Fig. 2, it is possible to disengage the stabilization, engage one, e.g. left stabilization roller 7, engage the push roll 8 or engage one, e.g. left stabilizer roll 7 and push roll 2 simultaneously.

When pulling out the piston of the stabilizing rollers 6, 7 j · ¹ ! the side plates of the reinforcement section are extended. In the second exemplary embodiment, according to FIG. 2, the right side stabilizing roller 6 cannot be ejected.

Claims (1)

Connection of the hydraulic stabilization of the mine mechanized reinforcement, consisting of both the control block, whose control module and the control are connected to the pressure and waste branch, and the double cock and hydraulic cylinders, characterized in that the control block (1) is located in the controlled a reinforcing section, wherein a twin check valve (5) with a logic function OR is connected to the branch (4) connecting the control module (11) to the piston rod space (32) of the transfer cylinder (3), a double check valve with logic function OR and a double tap (9) is inserted between the right stabilizing cylinder (6), the left stabilizing cylinder (7) and the depressurizing cylinder (8), with the piston chamber (61, 71, 81) of the right stabilizing cylinder (6), left anti-roll bar (7) and push roller (8) are hydraulically connected to each other and connected directly to the actuator ( 12).