A drilling rig power block hoist control hydraulic system

Abstract

The utility model discloses a rig power head winch control hydraulic system, including pump group, main reversing valve union, pressurization reversing valve union, main winch motor and pressurization winch motor, pump group connects main reversing valve union with pressurization reversing valve union, main reversing valve union is connected with main winch motor through main balance valve group, pressurization reversing valve union is connected with pressurization winch motor through pressurization balance valve group, still include main floating reversing valve and pressurization overflow valve, main floating reversing valve can control the on -off state of two working ports of main winch motor, pressurization overflow valve can control the on -off state of two working ports of pressurization winch motor. During the working process, two winch motors can work respectively, when one motor normal work, another motor can follow floating braking, realizes motor state switching through the valve, realizes the automation control, and can reduce energy consumption simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic systems, and in particular to a hydraulic system for controlling the winch of a drilling rig power head. Background Technology

[0002] Drilling rigs are widely used in drilling projects. Their drilling work is mainly completed by a power head. During the operation, the power head and the winch are connected by a wire rope. The winch tightens or releases the wire rope to complete the raising and lowering of the power head.

[0003] In existing technologies, to meet the movement requirements of the power head in different workflows, a main winch and a pressurizing winch are set up. When the power head moves normally, the main winch operates; when the power head needs to move under pressure, the pressurizing winch operates. However, when one winch is operating, the other winch cannot follow in real time, making automated control impossible and resulting in increased energy consumption and energy waste.

[0004] Therefore, how to provide a hydraulic control system for the hoisting of a drilling rig power head that can automatically switch the working state of the hoist is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic control system for the power head winch of a drilling rig. Through the main floating directional valve and the pressure relief valve, the main winch motor and the pressure winch motor can float and automatically follow, thereby achieving automated control, reducing energy consumption and saving energy.

[0006] To solve the above-mentioned technical problems, this utility model provides a hydraulic control system for the hoisting of a drilling rig power head, including a pump set, a main directional valve assembly, a pressurized directional valve assembly, a main hoisting motor, and a pressurized hoisting motor. The pump set is connected to the main directional valve assembly and the pressurized directional valve assembly. The main directional valve assembly is connected to the main hoisting motor through a main balance valve assembly. The pressurized directional valve assembly is connected to the pressurized hoisting motor through a pressurized balance valve assembly. The system also includes a main floating directional valve and a pressurized relief valve. The main floating directional valve is connected to two working ports of the main hoisting motor and can control the conduction state of the two working ports. The pressurized relief valve is connected to two working ports of the pressurized hoisting motor and can control the conduction state of the two working ports. The main hoist, the pressurized hoist, and the power head are connected by cables.

[0007] Preferably, the main floating directional valve is a two-position two-way solenoid directional valve, and the two working ports of the two-position two-way solenoid directional valve are respectively connected to the two working ports of the main hoist motor.

[0008] Preferably, the pressurized relief valve is a hydraulically controlled relief valve, which further includes two inlet check valves and two outlet check valves. The two working ports of the pressurized winch motor are respectively connected to the inlet of the hydraulically controlled relief valve through the two inlet check valves. The outlet of the hydraulically controlled relief valve is respectively connected to the two working ports of the pressurized winch motor through the two outlet check valves. The hydraulically controlled port of the hydraulically controlled relief valve is connected to the pressurized unlocking oil passage.

[0009] Preferably, the system includes a main unlocking valve, a main shuttle valve, and a main brake. A pilot oil source is connected to the first port of the main shuttle valve through the main unlocking valve. The second port of the main shuttle valve is connected to the main unlocking oil passage, and the third port of the main shuttle valve is connected to the main brake.

[0010] Preferably, the device includes a pressure-pressurizing unlocking valve, a pressure-pressurizing shuttle valve, and a pressure-pressurizing brake. The pilot oil source is connected to the first port of the pressure-pressurizing shuttle valve through the pressure-pressurizing unlocking valve. The second port of the pressure-pressurizing shuttle valve is connected to the pressure-pressurizing unlocking oil passage. The third port of the pressure-pressurizing shuttle valve is connected to the pressure-pressurizing brake.

[0011] Preferably, the main unlocking valve and the pressurized unlocking valve are specifically two-position three-way solenoid directional valves, and the return port of the two-position three-way solenoid directional valve is connected to the oil tank.

[0012] Preferably, it includes a main handle and a pressurizing handle, wherein the main handle is connected to the main directional valve assembly via a main action sensor, and the pressurizing handle is connected to the pressurizing directional valve assembly via a pressurizing action sensor.

[0013] Preferably, the pump set includes a switching valve, and the pump set includes a main pump and an auxiliary pump. The output port of the main pump is connected to the inlet port of the main directional valve assembly. The working port of the main directional valve assembly is simultaneously connected to the working port of the main hoist motor and the main working port of the switching valve. The output port of the auxiliary pump is connected to the inlet port of the pressurizing directional valve assembly. The working port of the pressurizing directional valve assembly is connected to the auxiliary working port of the switching valve. The pressurizing working port of the switching valve is connected to the working port of the pressurizing hoist motor. When the switching valve is in the first working position, the main working port is connected to the pressurizing working port. When the switching valve is in the second working position, the auxiliary working port is connected to the pressurizing working port.

[0014] Preferably, the switching valve is a two-position six-way hydraulic control directional valve, and the hydraulic control port of the two-position six-way hydraulic control directional valve is connected to the pilot oil source through a pilot solenoid valve.

[0015] Preferably, when the main winch is raised or lowered, the pressure relief valve opens the two working ports of the pressure winch motor, and the pressure winch motor is in a floating state and moves with the main winch motor; when the pressure winch is pressed downward, the main floating reversing valve opens the two working ports of the main winch motor, and the main winch motor is in a floating state and moves with the pressure winch motor; when the main winch and the pressure winch are forcefully raised, the switching valve is in the first working position, the main pump simultaneously supplies oil to the main winch motor and the pressure winch motor, and the main winch motor and the pressure winch motor move synchronously.

[0016] This utility model provides a hydraulic control system for a drilling rig power head winch, including a pump set, a main directional valve assembly, a pressurized directional valve assembly, a main winch motor, and a pressurized winch motor. The pump set is connected to the main directional valve assembly and the pressurized directional valve assembly. The main directional valve assembly is connected to the main winch motor through a main balance valve assembly, and the pressurized directional valve assembly is connected to the pressurized winch motor through a pressurized balance valve assembly. It also includes a main floating directional valve and a pressurized relief valve. The main floating directional valve is connected to two working ports of the main winch motor and can control the conduction state of the two working ports. The pressurized relief valve is connected to two working ports of the pressurized winch motor and can control the conduction state of the two working ports. The main winch, the pressurized winch, and the power head are connected by cables.

[0017] During operation, the two winch motors can work independently. When one motor is working normally, the other motor can float and brake to follow. The motor state can be switched through the valve to achieve automatic control, while reducing energy consumption and saving energy. Attached Figure Description

[0018] Figure 1 A hydraulic schematic diagram of a specific embodiment of the hydraulic control system for the drilling rig power head winch provided by this utility model;

[0019] Figure 2 A schematic diagram of a specific embodiment of the hydraulic control system for the power head winch of the drilling rig provided by this utility model;

[0020] Figure 3 A hydraulic schematic diagram of the main winch in one specific embodiment of the hydraulic control system for the drilling rig power head winch provided by this utility model;

[0021] Figure 4 This is a hydraulic schematic diagram of the pressurized winch in one specific embodiment of the hydraulic control system for the drilling rig power head winch provided by this utility model.

[0022] Among them, the main directional valve assembly 1, the pressurized directional valve assembly 2, the main winch motor 3, the pressurized winch motor 4, the main balance valve assembly 5, the pressurized balance valve assembly 6, the main floating directional valve 7, the pressurized relief valve 8, the main winch 9, the pressurized winch 10, the power head 11, the inlet check valve 12, the outlet check valve 13, the main unlocking valve 14, the main shuttle valve 15, the main brake 16, the main unlocking oil passage 17, the pressurized unlocking valve 18, the pressurized shuttle valve 19, the pressurized brake 20, the pressurized unlocking oil passage 21, the main handle 22, the pressurized handle 23, the main action sensor 24, the pressurized action sensor 25, the switching valve 26, the main pump 27, the auxiliary pump 28, and the pilot solenoid valve 29. Detailed Implementation

[0023] The core of this utility model is to provide a hydraulic control system for the hoisting of a drilling rig power head. Through the main floating directional valve and the pressurized overflow valve, the main hoisting motor and the pressurized hoisting motor can float and automatically follow, realizing automated control, reducing energy consumption and saving energy.

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Please refer to Figures 1 to 4 , Figure 1 A hydraulic schematic diagram of a specific embodiment of the hydraulic control system for the drilling rig power head winch provided by this utility model; Figure 2 A schematic diagram of a specific embodiment of the hydraulic control system for the power head winch of the drilling rig provided by this utility model; Figure 3 A hydraulic schematic diagram of the main winch in one specific embodiment of the hydraulic control system for the drilling rig power head winch provided by this utility model; Figure 4 This is a hydraulic schematic diagram of the pressurized winch in one specific embodiment of the hydraulic control system for the drilling rig power head winch provided by this utility model.

[0026] This utility model provides a hydraulic control system for a drilling rig power head winch, applied to drilling equipment. The drilling rig includes a main winch 9, a pressurized winch 10, and a power head 11. These components are connected by cables. The power component of the main winch 9 is the main winch motor 3, and the power component of the pressurized winch 10 is a pressurized winch. The hydraulic system includes a pump set, a main directional valve assembly 1, a pressurized directional valve assembly 2, a main winch motor 3, and a pressurized winch motor 4. The pump set's inlet is connected to an oil tank, and its outlet is connected to the main directional valve assembly 1 and the pressurized directional valve assembly 2. Furthermore, the main directional valve assembly 1 is connected to the main winch motor 3 via a main balance valve assembly 5, and the pressurized directional valve assembly 2 is connected to the pressurized winch motor 4 via a pressurized balance valve assembly 6. The main directional valve assembly 1 and the pressurized directional valve assembly 2 enable the rotation and reversing of the corresponding motors, while the main balance valve assembly 5 and the pressurized balance valve assembly 6 ensure stable operation of the corresponding motors. It also includes a main floating directional valve 7 and a pressure relief valve 8. The main floating directional valve 7 is connected to the two working ports of the main hoist motor 3 and can control the conduction state of the two working ports of the main hoist motor 3. The pressure relief valve 8 is connected to the two working ports of the pressure hoist motor 4 and can control the conduction state of the two working ports of the pressure hoist motor 4.

[0027] When the main winch 9 is raised or lowered, the hydraulic oil output by the pump unit enters the main winch motor 3 through the main directional valve 1 and the main balance valve group 5. The main winch motor 3 works normally, and the pressure relief valve 8 works to open the two working ports of the pressure winch motor 4. The pressure winch motor 4 floats and follows the main winch motor 3.

[0028] When the pressure winch 10 pressurizes downwards, the hydraulic oil output by the pump unit enters the pressure winch motor 4 through the pressure reversing valve group 2 and the pressure balance valve group 6. The pressure winch motor 4 operates normally, and the main floating reversing valve 7 operates to connect the two working ports of the main winch motor 3. The main winch motor 3 floats and follows the action of the pressure winch motor 4.

[0029] During operation, the two winch motors can work independently. When one motor is working normally, the other motor can float and brake to follow. The motor state can be switched through the valve to achieve automatic control, while reducing energy consumption and saving energy.

[0030] Specifically, the main floating directional valve 7 is a two-position, two-way solenoid directional valve, with its two working ports connected to the two working ports of the main hoist motor 3, respectively. One working position of the two-position, two-way solenoid directional valve is the isolation position, and the other working position is the conduction position. The two-position, two-way solenoid directional valve is switched by an electrical signal to realize the conduction or isolation of the two working ports of the main hoist motor 3.

[0031] The pressure relief valve 8 is specifically a hydraulically controlled relief valve, which also includes two inlet check valves 12 and two outlet check valves 13. The two working ports of the pressure winch motor 4 are connected to the inlet of the hydraulically controlled relief valve through the two inlet check valves 12, and the outlet of the hydraulically controlled relief valve is connected to the two working ports of the pressure winch motor 4 through the two outlet check valves 13. The hydraulic control port of the hydraulically controlled relief valve is connected to the pressure unlocking oil passage 21. When the pressure winch motor 4 needs to float, the pressure relief valve 8 opens, and the hydraulic oil from one working port of the pressure winch motor 4 passes through the inlet check valve 12, the pressure relief valve 8, and the outlet check valve 13 in sequence to enter the other working port of the pressure winch motor 4. Backflow is prevented by the corresponding check valves. When the pressure winch motor 4 is working normally, the pressure relief valve 8 closes, and the pressure winch motor 4 cannot float.

[0032] In the hydraulic control system for the drilling rig power head winch provided in this specific embodiment of the utility model, to achieve the braking effect, it includes a main unlocking valve 14, a main shuttle valve 15, and a main brake 16. A pilot oil source is connected to the first port of the main shuttle valve 15 through the main unlocking valve 14. The second port of the main shuttle valve 15 is connected to the main unlocking oil passage 17, and the third port of the main shuttle valve 15 is connected to the main brake 16. It also includes a pressure unlocking valve 18, a pressure shuttle valve 19, and a pressure brake 20. A pilot oil source is connected to the first port of the pressure shuttle valve 19 through the pressure unlocking valve 18. The second port of the pressure shuttle valve 19 is connected to the pressure unlocking oil passage 21, and the third port of the pressure shuttle valve 19 is connected to the pressure brake 20. When the brake is released, the corresponding unlocking valve opens, and pilot oil from the pilot oil source enters the brake, unlocking the brake. Specifically, the main unlocking valve 14 and the pressure unlocking valve 18 are two-position three-way solenoid directional valves, and the return port of the two-position three-way solenoid directional valve is connected to the oil tank. The type of valve can also be selected according to the situation, and all of them are within the protection scope of this utility model.

[0033] To achieve control, the system includes a main handle 22 and a pressure handle 23. The main handle 22 is connected to the main directional valve assembly 1 via the main action sensor 24, and the pressure handle 23 is connected to the pressure directional valve assembly 2 via the pressure action sensor 25.

[0034] Based on the hydraulic control system for the drilling rig power head winch provided in the above specific embodiments, a switching valve 26 is included. The pump set includes a main pump 27 and an auxiliary pump 28. The output port of the main pump 27 is connected to the inlet of the main directional valve assembly 1. The working port of the main directional valve assembly 1 is simultaneously connected to the working port of the main winch motor 3 and the main working port of the switching valve 26. The output port of the auxiliary pump 28 is connected to the inlet of the pressurized directional valve assembly 2. The working port of the pressurized directional valve assembly 2 is connected to the auxiliary working port of the switching valve 26. The pressurized working port of the switching valve 26 is connected to the working port of the pressurized winch motor 4. When the switching valve 26 is in the first working position, the main working port is connected to the pressurized working port. When the switching valve 26 is in the second working position, the auxiliary working port is connected to the pressurized working port. Specifically, the switching valve 26 is a two-position six-way hydraulically controlled directional valve. The hydraulic control port of the two-position six-way hydraulically controlled directional valve is connected to the pilot oil source through a pilot solenoid valve 29.

[0035] The specific work process is as follows:

[0036] When the main winch 9 is lifted or lowered, the main motion sensor 24 sends a command to control the pressure unlocking valve 18 to be energized. The pilot pressure oil enters the pressure brake 20 through the pressure shuttle valve 19, opening the pressure brake 20. Since the pressure relief valve 8 controls the oil circuit to return to the drain through the pressure unlocking oil passage 21, the pressure relief valve 8 is in a low pressure or open state. The openings at both ends of the pressure winch motor 4 are connected to the floating state. Under the pulling force of the main winch motor 3, the pressure winch 10 is in a floating state and follows the main winch 9 to be lifted or lowered.

[0037] When the pressurized winch 10 pressurizes downwards, the pilot control oil controls the pressurized relief valve 8 to be in a high-pressure relief state through the pressurized unlocking oil passage 21, ensuring that the pressurized winch motor 4 operates at high pressure. At the same time, the pressurized action sensor 25 sends a command to control the main unlocking valve 14 to energize and open the main brake 16, and controls the main floating reversing valve 7 to connect the two working ports of the main winch motor 3, so that the main winch motor 3 floats and follows the pressurized winch motor 4 to move downwards.

[0038] When the handle button issues a force-lifting command, the pilot solenoid valve 29 is energized, and the pilot control pressure oil pushes the switching valve 26 to the first working position. The pressure oil of the main pump 27 lifts the main winch motor 3 after passing through the main reversing valve 1, and at the same time enters the pressure winch motor 4 through the switching valve 26 to lift the pressure winch 10. Since the pressure winch 10 and the main winch 9 lift the power head 11 at the same time, the main pump 27 supplies oil to both motors at the same time. Under the premise of single pump, dual motors, and the same object being lifted, the flow rate is automatically distributed to ensure that the pressure winch 10 and the main winch 9 lift the power head 11 synchronously.

[0039] The hydraulic control system for the drilling rig power head winch provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A hydraulic control system for the winch of a drilling rig power head, characterized in that, The system includes a pump set, a main directional valve assembly (1), a pressurized directional valve assembly (2), a main winch motor (3), and a pressurized winch motor (4). The pump set is connected to the main directional valve assembly (1) and the pressurized directional valve assembly (2). The main directional valve assembly (1) is connected to the main winch motor (3) through a main balance valve assembly (5). The pressurized directional valve assembly (2) is connected to the pressurized winch motor (4) through a pressurized balance valve assembly (6). The system also includes a main floating directional valve (7) and a pressurized relief valve (8). The main floating directional valve (7) is connected to the two working ports of the main winch motor (3) and can control the conduction state of the two working ports of the main winch motor (3). The pressurized relief valve (8) is connected to the two working ports of the pressurized winch motor (4) and can control the conduction state of the two working ports of the pressurized winch motor (4). The system is connected to the main winch (9), the pressurized winch (10), and the power head (11) through cables.

2. The hydraulic control system for the drilling rig power head winch according to claim 1, characterized in that, The main floating directional valve (7) is specifically a two-position two-way electromagnetic directional valve, and the two working ports of the two-position two-way electromagnetic directional valve are respectively connected to the two working ports of the main hoist motor (3).

3. The hydraulic control system for the drilling rig power head winch according to claim 2, characterized in that, The pressurized overflow valve (8) is specifically a hydraulically controlled overflow valve, which also includes two inlet check valves (12) and two outlet check valves (13). The two working ports of the pressurized hoist motor (4) are respectively connected to the inlet of the hydraulically controlled overflow valve through the two inlet check valves (12). The outlet of the hydraulically controlled overflow valve is respectively connected to the two working ports of the pressurized hoist motor (4) through the two outlet check valves (13). The hydraulically controlled port of the hydraulically controlled overflow valve is connected to the pressurized unlocking oil passage (21).

4. The hydraulic control system for the drilling rig power head winch according to claim 3, characterized in that, It includes a main unlocking valve (14), a main shuttle valve (15) and a main brake (16). The pilot oil source is connected to the first port of the main shuttle valve (15) through the main unlocking valve (14), the second port of the main shuttle valve (15) is connected to the main unlocking oil passage (17), and the third port of the main shuttle valve (15) is connected to the main brake (16).

5. The hydraulic control system for the drilling rig power head winch according to claim 4, characterized in that, It includes a pressure unlocking valve (18), a pressure shuttle valve (19), and a pressure brake (20). The pilot oil source is connected to the first port of the pressure shuttle valve (19) through the pressure unlocking valve (18). The second port of the pressure shuttle valve (19) is connected to the pressure unlocking oil passage (21). The third port of the pressure shuttle valve (19) is connected to the pressure brake (20).

6. The hydraulic control system for the drilling rig power head winch according to claim 5, characterized in that, The main unlocking valve (14) and the pressurized unlocking valve (18) are specifically two-position three-way solenoid directional valves, and the return port of the two-position three-way solenoid directional valve is connected to the oil tank.

7. The hydraulic control system for the drilling rig power head winch according to claim 1, characterized in that, It includes a main handle (22) and a pressure handle (23). The main handle (22) is connected to the main reversing valve assembly (1) via a main action sensor (24), and the pressure handle (23) is connected to the pressure reversing valve assembly (2) via a pressure action sensor (25).

8. The hydraulic control system for the drilling rig power head winch according to any one of claims 1 to 7, characterized in that, The pump set includes a switching valve (26), a main pump (27) and an auxiliary pump (28). The output port of the main pump (27) is connected to the inlet of the main directional valve assembly (1). The working port of the main directional valve assembly (1) is connected to both the working port of the main hoist motor (3) and the main working port of the switching valve (26). The output port of the auxiliary pump (28) is connected to the inlet of the pressurized directional valve assembly (2). The working port of the pressurized directional valve assembly (2) is connected to the auxiliary working port of the switching valve (26). The pressurized working port of the switching valve (26) is connected to the working port of the pressurized hoist motor (4). When the switching valve (26) is in the first working position, the main working port is connected to the pressurized working port. When the switching valve (26) is in the second working position, the auxiliary working port is connected to the pressurized working port.

9. The hydraulic control system for the drilling rig power head winch according to claim 8, characterized in that, The switching valve (26) is specifically a two-position six-way hydraulic control directional valve, and the hydraulic control port of the two-position six-way hydraulic control directional valve is connected to the pilot oil source through the pilot solenoid valve (29).

10. The hydraulic control system for the drilling rig power head winch according to claim 9, characterized in that, When the main winch (9) is raised or lowered, the pressure relief valve (8) opens the two working ports of the pressure winch motor (4), and the pressure winch motor (4) is in a floating state and moves with the main winch motor (3); when the pressure winch (10) applies pressure downward, the main floating reversing valve (7) opens the two working ports of the main winch motor (3), and the main winch motor (3) is in a floating state and moves with the pressure winch motor (4); when the main winch (9) and the pressure winch (10) are forcefully raised, the switching valve (26) is in the first working position, and the main pump (27) simultaneously supplies oil to the main winch motor (3) and the pressure winch motor (4), and the main winch motor (3) and the pressure winch motor (4) move synchronously.

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