CS241564B1 - Device for controlling at least two hydraulic systems for working functions! grab - Google Patents

Abstract

The connection of the hydraulic system of the grab according to the invention allows the control of all required functions of the grabs (opening, closing and turning left — right) using a single multi-core cable. The control of the required working functions of the grabs is achieved using two separate hydraulic systems, in which two reversing electric motors are installed, which drive two reversing hydrogenerators.

Description

241564

The invention addresses the connection of a hydraulic system of working functions of a grab as an opening, closing and rotating one multi-wire power cable.

So far, known designs of grab hydraulic systems, which control individual working functions (opening and closing the grab, turning grab to the left, right) are solved by means of a hydraulic pump with constant supply of pressure fluid driven by an electric motor and individual working functions are secured by electrical magnetic or electrical hydraulic distributors. In order to ensure that these grabs are functioning, it is necessary to bring the trolley power to the grab by means of a multi-wire cable and several power cables to control the electrical magnetic distributors. In the prevailing load of grab hoists, the supply of a plurality of power and control cables from the hoist structure to the grab structure requires a very complex and space-consuming additional device.

The above mentioned drawbacks are eliminated by connecting the hydraulic system of the working functions of the grab according to the invention and its essence being that it is formed by a first independent control circuit for controlling the first hydraulic system and the second separate control circuit for controlling the second hydraulic system, the control circuits being formed by the conversion an electric motor, mechanically coupled to the pump, which is connected to the 1 ' and 1 ' ' ' ' ' ' the duct is connected to the right duct by a valve block connected to the left duct between the throttle valve and the left outlet duct and to the right duct between the duct valve and the right outlet duct A waste pressure valve, a filter, and a waste line leading into the tank are connected via the line and the outlet of the flushing distributor. By this connection, it is possible to control the required functions of the grabs (opening, closing, rotating left, right) with one multi-core cable. The feeder from the hoist construction of the hoist construction requires a considerably simpler attachment.

The attached drawing shows a hydraulic system connection. The control circuit 24 is designed to operate the first hydraulic system 21 for opening and gripping the grab. The control circuit 25 is intended to control the second hydraulic system 23 for rotating the grab. The hydraulic elements 1, 19, 20 are common to both control circuits 24, 25.

The reversing electric motor 5 drives over the mechanical connection the pump 4, which supplies the pressurized fluid through the left outlet pipe 27, the pipe 8 and the throttle valve 12 to the inlet of the first hydraulic system 21, respectively. to the entry of the second hydraulic system 23. turning in one direction. When the pressure in the left-hand pipe 8 increases, the pressure of the pressure valve 7 is connected to the right-hand pipe 8 with the right-hand pipe 9.

Upon reversing the electric motor 5, the hydraulic pump 4 gives the pressure fluid 28 the right outlet pipe 28, the right pipe 9 and the throttle valve 13 into the inlet of the first hydraulic system 21, respectively. into the inlet of the second hydraulic system 23. rotation in the second direction. When the pressure in the line 9 is raised above the set pressure on the right pressure valve 6, the right-hand pipe 9 is connected to the 1'a line 8.

The unidirectional throttle valves 12, 13 are intended to control the closing and opening speed of the grab or the clamp. turning in both directions. .

The unidirectional hydraulic locks 14, 15 and 16 serve to stabilize the position of the linear hydraulic motors 17, 18 when the electric motor 5 of the control circuit 24 is switched off.

The double hydraulic lock 26 is intended to stabilize the position of the hydraulic motor 22 for rotating the grab when the electric motor 5 is switched off.

The flush distributor 10 of the valve block 29 is designed to discharge excess fluid of the control circuit 24 and the control circuit 24 respectively. 25 through the waste pressure valve 11, the filter 19 and the drain pipe 20 into the tank 1.

The invention can be used in all devices in which it is necessary to control the four working functions of the hydraulic device with one multicore cable.

Claims (1)

SUBJECT Apparatus for controlling at least two hydraulic systems for carrying out the grab working functions, characterized in that it comprises a first separate control circuit (24) for controlling the first hydraulic system (21) and a second separate control circuit (25) for controlling the second hydraulic system (23), wherein the control circuits (24) and (25) are formed by a reversible electric motor (5) mechanically coupled to a hydrogen generator (4) which is connected to a left-hand conduit (8) by a left-hand outlet conduit (27); right outlet pipe (28) to the right pipe (9), the pipe (8) And (9) are connected to the tank (1) at one end via the check valves (2) and (3) and at the other end connected to the inlets of the hydraulic system (21) and (13) via the throttle valves (12) and (13). (23) and the left-hand pipe (8) is connected to the right-hand pipe (9) by means of a valve block (29) connected to the left-hand pipe (8) between the throttle valve (12J and the left-hand outlet pipe (27)) a line (9) between the throttle valve (13) and the right outlet line (28) and a outlet pressure valve (11), a filter (19) and an outlet line (20) leading to the tank (1) are connected to the outlet of the flushing distributor (10) .