A jumbo boom self-parallel hydraulic control system

Abstract

The utility model discloses a kind of hydraulic control systems of self-parallel rock drilling jumbo boom, its boom includes base, swing seat, drill arm, propulsion beam assembly, swing seat one end is vertically hinged on the base, other end is horizontally hinged with drill arm one end;Drill arm includes big arm, the big arm one end is rotatably connected with the swing seat, big arm other end connects small arm one end, small arm other end is connected with the propulsion beam assembly through rotary connecting piece;Big arm is connected with base between swing oil cylinder, first swing parallel oil cylinder, first pitch oil cylinder;Small arm is connected with rotary connecting piece between second pitch oil cylinder, second swing parallel oil cylinder;Hydraulic control circuit includes first hydraulic lock, second hydraulic lock, hydraulic oil tank, for controlling the extension action of each oil cylinder.The utility model can control boom each direction's pitch and swing, realize the demand of different angle working position in rectangular operation range.

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 self-parallel hydraulic control system for the boom 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. A typical rock drilling rig includes a body, a traveling mechanism, a boom, and drill rods. During operation, the boom mechanism extends the drill rod to the appropriate position. Controlled by impact and drill bit rotation mechanisms, the drill rod rotates and impacts the drill bit, while a dust removal mechanism expels the drilled debris, thus creating blast holes in the rock face. Rock drilling rigs require different drilling pressures depending on the rock conditions, and the boom's posture often needs fine-tuning during drilling operations to ensure tunnel accuracy. Existing booms generally use a triangular structure, which results in a semi-hexagonal working range during pitching or swinging, making it impossible to conform to the tunnel cross-section during tunnel construction. Summary of the Invention

[0003] To address the aforementioned problems, the purpose of this invention is to provide a self-parallel hydraulic control system for the boom of a rock drilling rig.

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

[0005] A self-parallel hydraulic control system for a rock drilling rig boom includes a base, a swing seat, a drill arm, and a push beam assembly. One end of the swing seat is vertically hinged to the base, and the other end is horizontally hinged to one end of the drill arm. The drill arm includes a boom, one end of which is rotatably connected to the swing seat, and the other end of which is connected to one end of a forearm. The other end of the forearm is connected to the push beam assembly via a rotating connector. A swing cylinder, a first swing parallel cylinder, and a first pitch cylinder are connected between the boom and the base. One end of the swing cylinder is hinged to the base, and the other end is hinged to one side of the boom. One end of the first swing parallel cylinder is hinged to the base, and the other end is hinged to the swing seat. One end of the first pitch cylinder is hinged to the swing seat, and the other end is hinged to the bottom end face of the boom. A second pitch cylinder and a second swing parallel cylinder are connected between the forearm and the rotating connector. One end of the second pitch cylinder is hinged to... On the top surface of the forearm, one end is hinged to a rotating connector. One end of the second swing parallel cylinder is hinged to the side of the forearm, and the other end is hinged to the rotating connector. The hydraulic control circuit includes a first hydraulic lock, a second hydraulic lock, and a hydraulic oil tank. The rodless chamber of the second swing parallel cylinder is connected to the oil port C2 of the first hydraulic lock and the rodless chamber of the first swing parallel cylinder. The rod chamber is connected to the oil port C1 of the first hydraulic lock and the rodless chamber of the first swing parallel cylinder. The rodless chamber of the second pitch cylinder is connected to the oil port C2 of the second hydraulic lock and the rod chamber of the first pitch cylinder. The rod chamber is connected to the oil port C1 of the second hydraulic lock and the hydraulic oil tank. The rod chamber of the swing cylinder is connected to the rod chamber of the first swing parallel cylinder. The oil ports V1 and V2 of the first hydraulic lock, the oil ports V1 and V2 of the second hydraulic lock, the rod chamber and the rodless chamber of the swing cylinder, and the rodless chamber of the first pitch cylinder are all connected to the hydraulic oil tank.

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

[0007] The self-parallel hydraulic control system of this rock drilling rig boom is simple in structure, reasonable in design, easy to operate, precise in control, convenient in maintenance, and highly practical. It uses the extension and retraction of each cylinder to control the boom's pitch and swing in all directions, realizing the needs of different working positions within a rectangular working range, and has good value for promotion and application. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural schematic diagram of the self-parallel hydraulic control system for the rock drilling rig boom of this utility model;

[0009] Figure 2 This is a schematic diagram of the main structure of the self-parallel hydraulic control system for the rock drilling rig boom of this utility model;

[0010] Figure 3 This is a rear view schematic diagram of the self-parallel hydraulic control system of the rock drilling rig boom of this utility model.

[0011] Figure 4 This is a schematic diagram of the hydraulic control circuit of the self-parallel hydraulic control system of the rock drilling rig boom of this utility model;

[0012] In the diagram: 1 - Propulsion beam assembly; 2 - Second pitch cylinder; 3 - Boom; 4 - Swing cylinder; 5 - Swing seat; 6 - Base; 7 - First swing parallel cylinder; 8 - First pitch cylinder; 9 - Arm; 10 - Second swing parallel cylinder; 11 - Rotary connector; 12 - First hydraulic lock; 13 - Second hydraulic lock; 14 - Hydraulic oil tank. Detailed Implementation

[0013] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1 , 2As shown in Figures 3 and 4, the rock drilling rig's boom is controlled by a parallel hydraulic system. The boom includes a base 6, a swing seat 5, a drill arm, and a propulsion beam assembly 1. One end of the swing seat 5 is vertically hinged to the base 6, and the other end is horizontally hinged to one end of the drill arm. The drill arm includes a boom 3, one end of which is rotatably connected to the swing seat 5, and the other end of which is connected to one end of the forearm 9. The other end of the forearm is connected to the propulsion beam assembly 1 via a rotating connector 11. A swing cylinder 4, a first parallel swing cylinder 7, and a first pitch cylinder 8 are connected between the boom 3 and the base 6. The swing cylinder 4... One end is hinged to the base 6, and the other end is hinged to one side of the upper arm 3. One end of the first swing parallel cylinder 7 is hinged to the base 6, and the other end is hinged to the swing seat 5. One end of the first pitch cylinder 8 is hinged to the swing seat 5, and the other end is hinged to the bottom end face of the upper arm 3. A second pitch cylinder 2 and a second swing parallel cylinder 10 are connected between the lower arm 9 and the rotary connector 11. One end of the second pitch cylinder 2 is hinged to the top surface of the lower arm 9, and the other end is hinged to the rotary connector 11. One end of the second swing parallel cylinder 10 is hinged to the side of the lower arm 9, and the other end is hinged to the rotary connector 11. The pressure control circuit includes a first hydraulic lock 12, a second hydraulic lock 13, and a hydraulic oil tank 14. The hydraulic oil tank 14 is equipped with oil ports A1-A4 and B1-B4. The rodless chamber of the second swing parallel cylinder 10 is connected to the oil port C2 of the first hydraulic lock 12 and the rodless chamber of the first swing parallel cylinder 7. The rod chamber is connected to the oil port C1 of the first hydraulic lock 12 and the rodless chamber of the first swing parallel cylinder 7, realizing the boom swing self-parallel function. The rodless chamber of the second pitch cylinder 2 is connected to the oil port C2 of the second hydraulic lock 13 and the rod chamber of the first pitch cylinder 8. The rod chamber is connected to the second hydraulic lock... The oil port C1 of 13 is connected to the oil port A1 on the hydraulic oil tank 14, realizing the boom pitch and parallel function; the rod chamber of the swing cylinder 4 is connected to the rod chamber of the first swing parallel cylinder 7; the oil ports V1 and V2 of the first hydraulic lock 12 are connected to the hydraulic oil tank 14 through the oil ports B4 and A4 respectively, the oil ports V1 and V2 of the second hydraulic lock 13 are connected to the hydraulic oil tank 14 through the oil ports B3 and A3 respectively, the rod chamber and rodless chamber of the swing cylinder 4 are connected to the hydraulic oil tank 14 through the oil ports B2 and A2 respectively, and the rodless chamber of the first pitch cylinder 8 is connected to the hydraulic oil tank 14 through the oil port B1.

[0015] In the aforementioned first hydraulic lock 12 and second hydraulic lock 13, oil port V1 and oil port C1 are connected to form working oil circuit a, and oil port V2 and oil port C2 are connected to form working oil circuit b.

[0016] The hydraulic control check valve and balance valve circuits installed on the rod-side and rodless sides of the swing cylinder 4, the first swing parallel cylinder 7, the first pitch cylinder 8, the second pitch cylinder 2, and the second swing parallel cylinder 10 are all existing technologies and will not be described in detail here.

[0017] This utility model relates to a self-parallel hydraulic control system for the boom of a rock drilling rig, which has the following 8 working states:

[0018] (1) Oil comes out of port A1, oil enters the rod chamber of the second pitch cylinder 2, causing the piston rod to retract. The return oil from the rodless chamber enters the rod chamber of the first pitch cylinder 8, causing the piston rod to retract, driving the boom 3 to pitch down, thereby realizing the upward movement of the propulsion beam assembly 1.

[0019] (2) Oil comes out of port B1, oil enters the rodless chamber of the first pitch cylinder 8, causing the piston rod to extend. The return oil from the rod chamber enters the rodless chamber of the first pitch cylinder 8, causing the piston rod to extend and drive the boom 3 to pitch upward, thereby realizing the downward movement of the propulsion beam assembly 1.

[0020] (3) Oil comes out of the A2 oil port, oil enters the rodless chamber of the swing cylinder 4, causing the piston rod to extend. The piston rod of the first swing parallel cylinder 7 extends accordingly, causing the return oil from the rod chamber to enter the rod chamber of the second swing parallel cylinder 10, causing the piston rod to retract, driving the boom 3 to swing to the right, thereby realizing the left swing of the propulsion beam assembly 1.

[0021] (4) Oil comes out of the B2 oil port, oil enters the rod chamber of the swing cylinder 4, causing the piston rod to retract. The piston rod of the first swing parallel cylinder 7 retracts accordingly, causing the return oil from the rodless chamber to enter the rodless chamber of the second swing parallel cylinder 10, causing the piston rod to retract, driving the boom 3 to swing to the left, thereby realizing the propulsion beam assembly 1 to swing to the right.

[0022] (5) Oil comes out of port A3 and oil enters the rodless chamber of the second pitching cylinder 2, causing the piston rod to extend and drive the propulsion beam assembly 1 to pitch upward.

[0023] (6) Oil comes out of port B3 and oil enters the rod chamber of the second pitching cylinder 2, causing the piston rod to retract and drive the propulsion beam assembly 1 to pitch down.

[0024] (7) Oil comes out of port A4 and oil enters the rodless chamber of the second swing parallel cylinder 10, causing the piston rod to extend and drive the propulsion beam assembly 1 to swing to the right.

[0025] (8) Oil comes out of port B4 and oil enters the rod chamber of the second swing parallel cylinder 10, causing the piston rod to retract and drive the propulsion beam assembly 1 to swing to the left.

[0026] 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 self-parallel hydraulic control system for a rock drilling rig boom, the boom comprising a base, a swing seat, a drill arm, and a feed beam assembly, wherein one end of the swing seat is vertically hinged to the base, and the other end is horizontally hinged to one end of the drill arm; the drill arm comprises a boom, one end of which is rotatably connected to the swing seat, the other end of which is connected to one end of a forearm, and the other end of which is connected to the feed beam assembly via a rotating connector; characterized in that: A swing cylinder, a first swing parallel cylinder, and a first pitch cylinder are connected between the boom and the base. One end of the swing cylinder is hinged to the base, and the other end is hinged to one side of the boom. One end of the first swing parallel cylinder is hinged to the base, and the other end is hinged to the swing seat. One end of the first pitch cylinder is hinged to the swing seat, and the other end is hinged to the bottom end face of the boom. A second pitch cylinder and a second swing parallel cylinder are connected between the forearm and the rotary connector. One end of the second pitch cylinder is hinged to the top surface of the forearm, and the other end is hinged to the rotary connector. One end of the second swing parallel cylinder is hinged to the side of the forearm, and the other end is hinged to the rotary connector. The hydraulic control circuit includes a first hydraulic lock, a second... Two hydraulic locks and a hydraulic oil tank are connected. The rodless chamber of the second swing parallel cylinder is connected to the oil port C2 of the first hydraulic lock and the rodless chamber of the first swing parallel cylinder. The rod chamber is connected to the oil port C1 of the first hydraulic lock and the rodless chamber of the first swing parallel cylinder. The rodless chamber of the second pitch cylinder is connected to the oil port C2 of the second hydraulic lock and the rod chamber of the first pitch cylinder. The rod chamber is connected to the oil port C1 of the second hydraulic lock and the hydraulic oil tank. The rod chamber of the swing cylinder is connected to the rod chamber of the first swing parallel cylinder. The oil ports V1 and V2 of the first hydraulic lock, the oil ports V1 and V2 of the second hydraulic lock, the rod chamber and the rodless chamber of the swing cylinder, and the rodless chamber of the first pitch cylinder are all connected to the hydraulic oil tank.

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