A hydraulic control system for lifting the arm base of a two-arm drill jumbo

Abstract

The utility model discloses a hydraulic control system of two arms rock drilling jumbo drill arm armrest lifting, it includes first electromagnetic reversing valve, second electromagnetic reversing valve, first two -way throttle valve, second two -way throttle valve, first check throttle valve, second check throttle valve, first fourth balance valve, first fourth telescopic oil cylinder, and the oil inlet of first, second electromagnetic reversing valve is connected system's oil inlet oil circuit, and the oil return of first, second electromagnetic reversing valve is connected system's oil return oil circuit, first electromagnetic reversing valve is connected with first, second telescopic oil cylinder through first two -way throttle valve, first check throttle valve, first balance valve, second balance valve, second electromagnetic reversing valve is connected with third, fourth telescopic oil cylinder through second two -way throttle valve, second check throttle valve, third balance valve, fourth balance valve, the utility model discloses can realize rock drilling jumbo drill arm lifting, increase the height of operation surface, make rock drilling jumbo operation surface more extensive.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic control technology for rock drilling rigs, and in particular relates to a hydraulic control system for lifting and lowering the drill arm support of a two-arm rock drilling rig. Background Technology

[0002] A rock drilling rig is a type of rock drilling equipment used in tunnel and underground engineering projects employing the drill-and-blast method. It can move and support multiple rock drills and drilling systems to perform drilling operations simultaneously. A rock drilling rig mainly consists of a rock drill, propeller, drill arm, chassis, traveling mechanism, and other necessary auxiliary equipment, as well as additional equipment added according to project requirements. Based on the number of rock drills and drilling systems mounted (the number of booms on the rock drilling rig), it can be divided into three types: single-boom, double-boom, and multi-boom. Existing double-boom and triple-boom rock drilling rigs suffer from problems such as insufficient working face height and interference risks when using multiple booms, significantly impacting work progress. Summary of the Invention

[0003] To address the aforementioned problems, the purpose of this invention is to provide a hydraulic control system for raising and lowering the boom of a two-arm rock drilling rig.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0005] A hydraulic control system for raising and lowering the boom of a two-arm rock drilling rig includes a first electromagnetic directional valve, a second electromagnetic directional valve, a first bidirectional throttle valve, a second bidirectional throttle valve, a first one-way throttle valve, a second one-way throttle valve, a first balance valve, a second balance valve, a third balance valve, a fourth balance valve, a first telescopic cylinder, a second telescopic cylinder, a third telescopic cylinder, and a fourth telescopic cylinder. The oil port P of the first electromagnetic directional valve and the oil port P1 of the second electromagnetic directional valve are connected to the system's inlet oil circuit. The oil ports T of the first and second electromagnetic directional valves are connected and also connected to the system's return oil circuit. The oil port A of the first electromagnetic directional valve is connected to the oil port P of the first one-way throttle valve via the first bidirectional throttle valve. Port A of a one-way throttle valve is connected to port B of the first and second balance valves. Port B of the first solenoid directional valve is connected to port C of the first and second balance valves via the first bidirectional throttle valve. Port A of the first and second balance valves is connected to the rodless chamber of the first and second telescopic cylinders, respectively. Port A of the second solenoid directional valve is connected to port P of the second one-way throttle valve via the second bidirectional throttle valve. Port A of the second one-way throttle valve is connected to port B of the third and fourth balance valves. Port B of the second solenoid directional valve is connected to port C of the third and fourth balance valves via the second bidirectional throttle valve. Port A of the third and fourth balance valves is connected to the rodless chamber of the third and fourth telescopic cylinders, respectively.

[0006] Due to the adoption of the technical solution described above, this utility model has the following advantages:

[0007] The hydraulic control system for lifting the boom of this two-arm rock drilling rig is simple to operate, precise to control, easy to maintain, quick and easy to assemble, and highly practical. It enables the drilling boom of the rock drilling rig to be lifted, thereby increasing the working face height, making the working face of the rock drilling rig wider, allowing multiple booms to work simultaneously without affecting each other, adapting to various geological conditions, ensuring high-efficiency operation, and has good value for promotion and application. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the hydraulic control system for lifting and lowering the boom of the two-arm rock drilling rig of this utility model.

[0009] In the diagram: 1 - First telescopic cylinder; 2 - Second telescopic cylinder; 3 - Third telescopic cylinder; 4 - Fourth telescopic cylinder; 5 - Third balance valve; 6 - Fourth balance valve; 7 - Second one-way throttle valve; 8 - Second two-way throttle valve; 9 - Second solenoid directional valve; 10 - First solenoid directional valve; 11 - First two-way throttle valve; 12 - First one-way throttle valve; 13 - First balance valve; 14 - Second balance valve. Detailed Implementation

[0010] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0011] like Figure 1As shown, the hydraulic control system for the lifting and lowering of the drilling arm support of this two-arm drilling rig includes a first solenoid directional valve 10, a second solenoid directional valve 9, a first bidirectional throttle valve 11, a second bidirectional throttle valve 8, a first one-way throttle valve 12, a second one-way throttle valve 7, a first balance valve 13, a second balance valve 14, a third balance valve 5, a fourth balance valve 6, a first telescopic cylinder 1 and a second telescopic cylinder 2 for controlling the lifting and lowering movement of the left drilling arm support, and a third telescopic cylinder 3 and a fourth telescopic cylinder 4 for controlling the lifting and lowering movement of the right drilling arm support. Port P of the first solenoid directional valve 10 and port P1 of the second solenoid directional valve 9 are connected to the system's inlet oil circuit. Ports T of the first solenoid directional valve 10 and the second solenoid directional valve 9 are connected and connected to the system's return oil circuit. Port A of the first solenoid directional valve 10 is connected to port P of the first one-way throttle valve 12 via the first bidirectional throttle valve 11. Port P of the first one-way throttle valve 12... A is connected to port B of the first balance valve 13 and port B of the second balance valve 14. Port B of the first solenoid directional valve 10 is connected to port C of the first balance valve 13 and port C of the second balance valve 14 via the first bidirectional throttle valve 11. Port A of the first balance valve 13 and port A of the second balance valve 14 are respectively connected to the rodless chamber of the first telescopic cylinder 1 and the rodless chamber of the second telescopic cylinder 2. Port A of the second solenoid directional valve 9 is connected to port P of the second one-way throttle valve 7 via the second bidirectional throttle valve 8. Port A of the second one-way throttle valve 7 is connected to port B of the third balance valve 5 and port B of the fourth balance valve 6. Port B of the second solenoid directional valve 9 is connected to port C of the third balance valve 5 and port C of the fourth balance valve 6 via the second bidirectional throttle valve 8. Port A of the third balance valve 5 and port A of the fourth balance valve 6 are respectively connected to the rodless chamber of the third telescopic cylinder 3 and the rodless chamber of the fourth telescopic cylinder 4.

[0012] The hydraulic control system for the lifting and lowering of the boom of this utility model two-arm rock drilling rig operates as follows: Oil simultaneously enters through port P of the first solenoid directional valve 10 and port P1 of the second solenoid directional valve 9. The two solenoid directional valves switch from the middle working position to the right working position, and the pressurized oil flows to the first bidirectional throttle valve 11 and the second bidirectional throttle valve 8. The pressurized oil flow rate is adjusted by the two bidirectional throttle valves to achieve stepless speed regulation of the telescopic cylinder. Then, the pressurized oil passes through the first one-way throttle valve 12 to the first balance valve 13 and the second... The balance valve 14, via the second one-way throttle valve 7, reaches the third balance valve 5 and the fourth balance valve 6. The balance valves can prevent the telescopic cylinders from falling during lifting. Finally, the pressurized oil reaches the first telescopic cylinder 1, the second telescopic cylinder 2, the third telescopic cylinder 3, and the fourth telescopic cylinder 4, causing the piston rods of the four telescopic cylinders to rise simultaneously until they reach the required working position. The first solenoid directional valve 10 and the second solenoid directional valve 9 are switched to the middle position, locking the four telescopic cylinders in the required position, i.e., the left and right drill arms reach the required working position.

[0013] After the left and right drill arms complete their work, oil enters simultaneously through port P of the first solenoid directional valve 10 and port P1 of the second solenoid directional valve 9. The two solenoid directional valves switch from the middle working position to the left working position. The pressurized oil passes through the first two-way throttle valve 11 and the second two-way throttle valve 8 to the first balance valve 13, the second balance valve 14, the third balance valve 5, and the fourth balance valve 6. At this time, the overflow valve in the balance valve opens, and the pressurized oil in the rodless chamber of the first telescopic cylinder 1, the second telescopic cylinder 2, the third telescopic cylinder 3, and the fourth telescopic cylinder 4 passes through the overflow valve in the balance valve to the first one-way throttle valve 12 and the second one-way throttle valve 7, which can adjust the falling speed of the telescopic cylinder. Finally, it flows into the return oil circuit of the system through port T of the first solenoid directional valve 10 and the second solenoid directional valve 9.

[0014] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic control system for raising and lowering the boom support of a two-arm rock drilling rig, characterized in that: It includes a first solenoid directional valve, a second solenoid directional valve, a first bidirectional throttle valve, a second bidirectional throttle valve, a first one-way throttle valve, a second one-way throttle valve, a first balance valve, a second balance valve, a third balance valve, a fourth balance valve, a first telescopic cylinder, a second telescopic cylinder, a third telescopic cylinder, and a fourth telescopic cylinder. The oil port P of the first solenoid directional valve and the oil port P1 of the second solenoid directional valve are connected to the system's inlet oil circuit. The oil ports T of the first and second solenoid directional valves are connected and also connected to the system's return oil circuit. The oil port A of the first solenoid directional valve is connected to the oil port P of the first one-way throttle valve via the first bidirectional throttle valve. The oil port A of the first one-way throttle valve is connected to... The first and second balance valves are connected by port B. The first solenoid directional valve's port B is connected to the first and second balance valves' ports C via the first bidirectional throttle valve. The first and second balance valves' ports A are connected to the rodless chambers of the first and second telescopic cylinders, respectively. The second solenoid directional valve's port A is connected to the second one-way throttle valve's port P via the second bidirectional throttle valve. The second one-way throttle valve's port A is connected to the third and fourth balance valves' ports B. The second solenoid directional valve's port B is connected to the third and fourth balance valves' ports C via the second bidirectional throttle valve. The third and fourth balance valves' ports A are connected to the rodless chambers of the third and fourth telescopic cylinders, respectively.

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