A hydraulic control system for a rock drilling jumbo articulated drum

Abstract

The utility model discloses a rock drilling jumbo hinged formula reel hydraulic control system, it includes auxiliary valve block, reel motor, reel open and close oil cylinder, and the oil port A1 of auxiliary valve block, oil port B1 are connected with the rodless cavity, the rod cavity of reel open and close oil cylinder respectively, and the oil port A2, oil port B2 are connected with the oil port A, oil port B of reel motor respectively, in the auxiliary valve block, the oil port P of auxiliary valve block is connected with the oil port P of first, second three position four way electromagnetic valve through the speed valve, and the oil port T is connected with the oil port T of first, second three position four way electromagnetic valve, and the oil port A, oil port B of first three position four way electromagnetic valve are connected with the oil port A1, oil port B1 of auxiliary valve block through hydraulic lock respectively, and the oil port A, oil port B of second three position four way electromagnetic valve are connected with the oil port A2, oil port B2 of auxiliary valve block through the superposition type double one-way throttle valve respectively, the utility model discloses can make the cable / water pipe reel of rock drilling jumbo adjust and release cable / water pipe speed, and reel open and close angle size.

Description

Technical Field

[0001] This utility model belongs to the field of rock drilling rig technology, and in particular relates to a hydraulic control system for an articulated drum of a rock drilling rig. Background Technology

[0002] A rock drilling rig is a type of rock drilling equipment used in tunnel and underground engineering projects. It can move and support multiple rock drills to perform drilling operations simultaneously. Its working mechanism mainly consists of a propeller, drill arm, slewing mechanism, and translation mechanism. The articulated drum, as an important component of the rock drilling rig, is mainly used for the deployment, winding, and guidance of cables and water pipes, ensuring the stability and accuracy of rock drilling operations. However, whether the drum can be opened and closed to reduce the overall size of the machine, and whether the speed of cable / water pipe deployment and winding is adjustable for ease of use, are important issues that must be considered. Summary of the Invention

[0003] To address the aforementioned problems, the purpose of this invention is to provide a hydraulic control system for an articulated drum on a rock drilling rig.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A hydraulic control system for an articulated drum of a rock drilling rig includes an auxiliary valve block, a drum motor, and a drum opening / closing cylinder. The auxiliary valve block has port P connected to a metering pump and port T connected back to the oil tank. Ports A1 and B1 of the auxiliary valve block are respectively connected to the rodless chamber and rod chamber of the drum opening / closing cylinder, and ports A2 and B2 are respectively connected to ports A and B of the drum motor. Port C of the drum motor is connected back to the oil tank. The auxiliary valve block contains a speed regulating valve, a hydraulic lock, a stacked double one-way throttle valve, and first and second three-position four-way solenoid valves. Port P of the auxiliary valve block is connected via... The speed control valve is connected to port P of the first and second three-position four-way solenoid valves, and port T is connected to port T of the first and second three-position four-way solenoid valves. Ports A and B of the first three-position four-way solenoid valve are connected to ports V1 and V2 of the hydraulic lock, respectively. Ports C1 and C2 of the hydraulic lock are connected to ports A1 and B1 of the auxiliary valve block. Ports A and B of the second three-position four-way solenoid valve are connected to the two inlets of the stacked double one-way throttle valve, respectively. The two outlets of the stacked double one-way throttle valve are connected to ports A2 and B2 of the auxiliary valve block, respectively.

[0005] Furthermore, the oil ports A1 and B1 of the aforementioned auxiliary valve block are connected to the rodless chamber and rod chamber of the drum opening and closing cylinder respectively via pipelines and straight connectors.

[0006] Due to the adoption of the technical solution described above, this utility model has the following advantages: This hydraulic control system for the articulated drum of the rock drilling rig enables the cable / water pipe drum of the rock drilling rig to adjust the speed of cable / water pipe winding and unwinding, as well as the opening and closing angle of the drum, according to specific conditions. It is suitable for various working environments, ensures high-efficiency operation, saves manpower, is simple to operate, has more precise control, is convenient for maintenance, reduces equipment failure rate and maintenance costs, and has good value for promotion and application. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the hydraulic control system for the articulated drum of the rock drilling rig of this utility model. In the diagram: 1 - Auxiliary valve block; 2 - Drum motor; 3 - Drum opening and closing cylinder; 4 - Straight connector; 5 - Speed ​​control valve; 6 - First three-position four-way solenoid valve; 7 - Hydraulic lock; 8 - Second three-position four-way solenoid valve; 9 - Stacked double one-way throttle valve. Detailed Implementation

[0008] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0009] like Figure 1 As shown, this hydraulic control system for an articulated drum of a rock drilling rig includes an auxiliary valve block 1, a straight connector 4, a drum motor 2, and a drum opening / closing cylinder 3. The auxiliary valve block has port P connected to a metering pump and port T connected back to the oil tank. Port A1 of the auxiliary valve block 1 is connected to the rodless chamber of the drum opening / closing cylinder 3 via a pipeline and straight connector 4. Port B1 is connected to the rod chamber of the drum opening / closing cylinder 3 via a pipeline and straight connector 4. Port A2 is connected to port A of the drum motor 2, port B2 is connected to port B of the drum motor, and port C of the drum motor is connected back to the oil tank. The auxiliary valve block 1 is equipped with a speed regulating valve 5, a hydraulic lock 7, a stacked double one-way throttle valve 9, a first three-position four-way solenoid valve 6, and a second three-position four-way solenoid valve 8. The neutral position function of the first solenoid valve 6 and the second three-position four-way solenoid valve 8 is Y-type. The oil port P of the auxiliary valve block 1 is connected to the oil port P of the first three-position four-way solenoid valve 6 and the second three-position four-way solenoid valve 8 via the speed regulating valve 5. The oil port T is connected to the oil port T of the first three-position four-way solenoid valve and the second three-position four-way solenoid valve. The oil ports A and B of the first three-position four-way solenoid valve 6 are connected to the oil ports V1 and V2 of the hydraulic lock 7, respectively. The oil ports C1 and C2 of the hydraulic lock are connected to the oil ports A1 and B1 of the auxiliary valve block 1. The oil ports A and B of the second three-position four-way solenoid valve 8 are connected to the two inlets of the stacked double one-way throttle valve 9, respectively. The two outlets of the stacked double one-way throttle valve are connected to the oil ports A2 and B2 of the auxiliary valve block 1, respectively.

[0010] Oil enters through port P of auxiliary valve block 1. The oil circuit is connected to port P of the first three-position four-way solenoid valve 6 via speed control valve 5. When electromagnet DT3 is energized, hydraulic oil flows through hydraulic lock 7 to port A1 of auxiliary valve block. From port A1 of auxiliary valve block, it passes through straight connector 4 (with throttle hole) to the rodless chamber of drum opening and closing cylinder 3, driving the piston rod to extend. At this time, the drum opens and moves away from the frame, facilitating the maintenance of the drum motor and internal components of the frame. When electromagnet DT4 is energized, hydraulic oil flows through hydraulic lock 7 to port B1 of auxiliary valve block. From port B1 of auxiliary valve block, it passes through straight connector 4 (with throttle hole) to the rod chamber of drum opening and closing cylinder, driving the piston rod to retract. At this time, the drum retracts and does not extend beyond the frame.

[0011] The speed control valve 5 mentioned above is a pressure-compensated throttle valve, which consists of a differential pressure reducing valve and a throttle valve connected in series. The throttle valve is used to regulate the flow rate, and the differential pressure reducing valve is used to automatically compensate for the influence of load changes, so that the pressure difference before and after the throttle valve is a constant value, thus eliminating the influence of load changes on the flow rate. The speed control valve should be used within the flow rate regulation range. If the flow rate exceeds the maximum allowable flow rate, a large pressure loss will occur when the valve is used, resulting in heat generation and malfunction. If the valve is used when the minimum allowable flow rate is exceeded, the regulated flow rate will be unstable or even interrupted.

[0012] The aforementioned hydraulic lock 7 is used to prevent the drum opening and closing cylinder from retracting on its own under the action of a heavy object, thus playing a locking role; the straight connector 4 (with a throttling orifice) is installed on the drum opening and closing cylinder 3, which enables the piston rod of the drum opening and closing cylinder 3 to extend and retract at a relatively stable speed, avoiding vibration.

[0013] Oil enters through port P of auxiliary valve block 1. The oil circuit is connected to port P of the second three-position four-way solenoid valve 8 via speed control valve 5. If electromagnet DT1 is energized, hydraulic oil flows from port A2 of auxiliary valve block to port A of drum motor 2 via stacked double one-way throttle valve 9. At this time, drum motor rotates forward to reel in cable / water pipe. If electromagnet DT2 is energized, hydraulic oil flows from port B2 of auxiliary valve block to port B of drum motor 2 via stacked double one-way throttle valve 9. At this time, drum motor rotates in reverse to unload cable / water pipe.

[0014] The function of the aforementioned superimposed double one-way throttle valve 9 is to control the flow rate of oil entering the drum motor 2 through port A and port B respectively, thereby controlling the motor rotation speed and adjusting it according to specific needs.

[0015] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with the preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A hydraulic control system for an articulated drum on a rock drilling rig, characterized in that: It includes an auxiliary valve block, a drum motor, and a drum opening / closing cylinder. The auxiliary valve block has port P connected to a metering pump and port T connected back to the oil tank. Ports A1 and B1 of the auxiliary valve block are connected to the rodless and rod-side chambers of the drum opening / closing cylinder, respectively. Ports A2 and B2 are connected to ports A and B of the drum motor, respectively. Port C of the drum motor is connected back to the oil tank. The auxiliary valve block contains a speed control valve, a hydraulic lock, a stacked double one-way throttle valve, and first and second three-position four-way solenoid valves. Port P of the auxiliary valve block is connected to the first and second three-position four-way solenoid valves via the speed control valve. The oil port P of the three-position four-way solenoid valve is connected, and the oil port T is connected to the oil port T of the first and second three-position four-way solenoid valves. The oil ports A and B of the first three-position four-way solenoid valve are connected to the oil ports V1 and V2 of the hydraulic lock, respectively. The oil ports C1 and C2 of the hydraulic lock are connected to the oil ports A1 and B1 of the auxiliary valve block. The oil ports A and B of the second three-position four-way solenoid valve are connected to the two inlet ports of the stacked double one-way throttle valve, respectively. The two outlet ports of the stacked double one-way throttle valve are connected to the oil ports A2 and B2 of the auxiliary valve block, respectively.

2. The hydraulic control system for the articulated drum of the rock drilling rig according to claim 1, characterized in that: The oil ports A1 and B1 of the auxiliary valve block are respectively connected to the rodless chamber and rod chamber of the drum opening and closing cylinder through pipelines and straight connectors.

Images