阅读说明：本技术 一种旋挖钻机主卷扬系统及其控制方法 (Main winch system of rotary drilling rig and control method thereof ) 是由 张永华 孙余 刘志刚 单昌猛 邱红臣 高霞芳 郜星 单俊云 耿倩斌 于 2020-05-12 设计创作，主要内容包括：一种旋挖钻机主卷扬系统及其控制方法,包括主动作回路、先导控制回路和反馈控制回路,所述主动作回路包括发动机、液压泵、主控制阀、平衡阀、主卷扬马达和油箱,所述先导控制回路包括先导手柄、电磁阀Ⅰ、压力继电器以及主动作回路中的主控制阀,所述反馈控制回路包括连接电磁阀Ⅱ以及主动作回路中的液压泵和主控制阀。在先导手柄执行主卷扬提升动作时,通过按钮控制,使电磁阀Ⅱ持续得电,电磁阀Ⅰ按既定规则得电、失电,可实现主卷扬按一定规则上下抖动,轻松地将钻具上附着的粘土抖掉,提高施工效率。(A main hoisting system of a rotary drilling rig and a control method thereof comprise a main operation loop, a pilot control loop and a feedback control loop, wherein the main operation loop comprises an engine, a hydraulic pump, a main control valve, a balance valve, a main hoisting motor and an oil tank, the pilot control loop comprises a pilot handle, an electromagnetic valve I, a pressure relay and a main control valve in the main operation loop, and the feedback control loop comprises a connecting electromagnetic valve II, a hydraulic pump in the main operation loop and a main control valve in the main operation loop. When the pilot handle executes the lifting action of the main winch, the solenoid valve II is continuously powered on through button control, the solenoid valve I is powered on and powered off according to a set rule, the main winch can shake up and down according to a certain rule, clay attached to a drilling tool is easily shaken off, and the construction efficiency is improved.)

1. The utility model provides a dig rig owner hoist system soon which characterized in that: including main work return circuit, guide control return circuit and feedback control return circuit, main work return circuit includes engine (1), hydraulic pump (2), main control valve (4), balanced valve (5), main hoist motor (6) and oil tank (3), guide control return circuit includes main control valve (4) in guide handle (7), solenoid valve I (8), pressure relay (10) and the main work return circuit, feedback control return circuit is including connecting hydraulic pump (2) and main control valve (4) in solenoid valve II (9) and the main work return circuit.

2. The main hoisting system of the rotary drilling rig according to claim 1, wherein: the oil supply port P1 of the hydraulic pump (2) is connected with the port P of the main control valve (4), the port A and the port B of the main control valve (4) are connected with the oil inlet of the balance valve (5), the oil outlet of the balance valve (5) is connected with the oil inlet and outlet of the main winch motor (6), and the port T of the main control valve (4) is connected with the oil tank (3).

3. The main hoisting system of the rotary drilling rig according to claim 1, wherein: the oil inlet of solenoid valve I (8) is connected with the promotion hydraulic fluid port of guide's handle (7), the oil-out of solenoid valve I (8) is connected with the promotion pilot oil port Xb1 of main control valve (4), and the oil return opening of solenoid valve I (8) is connected with oil tank (3), the hydraulic fluid port of transferring of guide's handle (7) is connected with the hydraulic fluid port Xa1 of transferring of main control valve (4), pressure relay (10) are connected on the promotion hydraulic fluid port of guide's handle (7).

4. The main hoisting system of the rotary drilling rig according to claim 1, wherein: the oil inlet of the solenoid valve II (9) is connected with a feedback oil port N1 of the main control valve (4), the oil outlet of the solenoid valve II (9) is connected with a feedback oil port Pi of the hydraulic pump (2), and the oil return port of the solenoid valve II (9) is connected with the oil tank (3).

5. The main hoisting system of the rotary drilling rig according to claim 1, wherein: and the solenoid valve I (8) and the solenoid valve II (9) are both two-position three-way solenoid valves.

6. The control method of the main hoisting system of the rotary drilling rig according to claim 1, characterized by comprising the following steps: the method comprises the following steps:

a. the pilot handle (7) is reversed to a lifting position and is controlled by a button, and the electromagnetic valve I (8) is powered on and powered off within a period time;

b. the electromagnetic valve II (9) is continuously electrified, and the hydraulic pump (2) is always maintained in the maximum displacement state.

7. The control method of the main hoisting system of the rotary drilling rig according to claim 6, wherein: in the step a, a pilot handle (7) is reversed to a lifting position, a solenoid valve I (8) is powered off, a main control valve (4) is opened, and a hydraulic pump (2) supplies oil to a main hoisting motor (6); the electromagnetic valve I (8) is electrified, the main control valve 4 is closed, and the lifting action of the main winch is stopped.

8. The control method of the main hoisting system of the rotary drilling rig according to claim 6, wherein: in the step b, the main control valve (4) is closed, the electromagnetic valve II (9) is continuously electrified, the feedback oil port Pi of the hydraulic pump (2) is communicated with the oil tank (3), the feedback pressure is reduced, and the hydraulic pump (2) is in the maximum displacement state.

9. The control method of the main hoisting system of the rotary drilling rig according to claim 6, wherein: in the step a, in each period, the electromagnetic valve I (8) is powered on and powered off once, and the power-on time and the power-off time are different numerical values.

Technical Field

The invention belongs to the field of engineering machinery, and particularly relates to a main hoisting system of a rotary drilling rig and a control method thereof.

Background

The rotary drilling rig is piling machinery used for hole forming operation, soil in a drilling tool needs to be dumped after each working cycle is finished, but clay attached to the inner wall of the drilling tool cannot fall off by itself, and the drilling tool needs to be shaken back and forth to shake the drilling tool.

Typically, the manipulator will choose two methods to shake off the clay: firstly, rapidly forward and backward rotating the power head back and forth, shaking the soil by the back and forth collision of the power head and the drill rod by utilizing the rotation inertia of the drill rod, and secondly, rapidly shaking the main winch back and forth, and shaking the soil by the back and forth collision of the drill rod and the drill bit by utilizing the vibration of a spring of the drill rod.

For the second soil shaking method, the frequency and amplitude of soil shaking are difficult to control. If the operation is too fast, the expansion amount of the drill rod spring is very small, the shaking amplitude is very small, and the soil shaking effect cannot be achieved; if the operation is too slow, the collision frequency of the drill rod and the drill bit is very low, and the soil shaking effect can not be achieved. Therefore, the operation frequency of the pilot handle needs to be mastered and is completely dependent on an operator, and the soil shaking frequency and amplitude are difficult to be ensured to be the same each time by manual operation, so that the good soil shaking effect cannot be achieved.

Meanwhile, another disadvantage of the second soil shaking method is that: in the manual soil shaking process, the main control valve can be opened and closed to change back and forth, the displacement of the hydraulic pump can be changed back and forth along with the main control valve, so that the response speed of the main winch is influenced, the main winch is slow in response when the handle is operated, certain hysteresis exists, and the soil shaking effect is not ideal.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a rotary drilling rig main hoisting system with sensitive response and good effect and a control method thereof.

The invention is realized by the following technical scheme: the utility model provides a dig rig main hoisting system soon, includes main action return circuit, guide's control circuit and feedback control return circuit, main action return circuit includes engine, hydraulic pump, main control valve, balanced valve, main hoist motor and oil tank, guide's control circuit includes guide's handle, solenoid valve I, pressure relay and the main control valve in the main action return circuit, feedback control return circuit is including connecting solenoid valve II and the hydraulic pump and the main control valve in the main action return circuit.

It further comprises the following steps: an oil supply port P1 of the hydraulic pump is connected with a port P of the main control valve, a port A and a port B of the main control valve are connected with an oil inlet of the balance valve, an oil outlet of the balance valve is connected with an oil inlet and an oil outlet of the main winch motor, and a port T of the main control valve is connected with an oil tank.

The oil inlet of solenoid valve I is connected with the promotion hydraulic fluid port of guide's handle, the oil-out of solenoid valve I is connected with the promotion guide hydraulic fluid port Xb1 of main control valve, and the oil return opening and the oil tank of solenoid valve I are connected, the hydraulic fluid port of transferring of guide's handle is connected with the hydraulic fluid port Xa1 of transferring of main control valve, pressure relay connects on the promotion hydraulic fluid port of guide's handle.

An oil inlet of the electromagnetic valve II is connected with a feedback oil port N1 of the main control valve, an oil outlet of the electromagnetic valve II is connected with a feedback oil port Pi of the hydraulic pump, and an oil return port of the electromagnetic valve II is connected with an oil tank.

And the solenoid valve I and the solenoid valve II are both two-position three-way solenoid valves.

The method comprises the following steps:

a. the pilot handle is reversed to a lifting position and is controlled by a button, and the electromagnetic valve I is powered on and powered off within a period time;

b. and the electromagnetic valve II is continuously electrified, and the hydraulic pump is always maintained in the maximum displacement state.

In the step a, a pilot handle is reversed to a lifting position, the electromagnetic valve I is powered off, the main control valve is opened, and the hydraulic pump supplies oil to the main hoisting motor; the electromagnetic valve I is electrified, the main control valve 4 is closed, and the lifting action of the main winch is stopped;

and in the step b, the main control valve is closed, the electromagnetic valve II is continuously electrified, the feedback oil port Pi of the hydraulic pump is communicated with the oil tank, the feedback pressure is reduced, and the hydraulic pump is in the maximum displacement state.

In the step a, in each period, the solenoid valve I is powered on and powered off once, and the power-on time and the power-off time are different numerical values.

The invention has the following advantages: the main winch system of the rotary drilling rig can realize automatic up-and-down shaking of the main winch through the button, the action response of the main winch is sensitive, the clay attached to a drilling tool can be easily shaken off, manual operation is not needed, the dependence on an operator is reduced, and the construction efficiency is improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

in the figure: 1. the hydraulic control system comprises an engine, 2, a hydraulic pump, 3, an oil tank, 4, a main control valve, 5, a balance valve, 6, a main hoisting motor, 7, a pilot handle, 8, electromagnetic valves I and 9, electromagnetic valves II and 10 and a pressure relay.

Detailed Description

The main hoisting system of the rotary drilling rig shown in fig. 1 comprises a main operation loop, a pilot control loop and a feedback control loop, wherein the main operation loop comprises an engine 1, a hydraulic pump 2, a main control valve 4, a balance valve 5, a main hoisting motor 6 and an oil tank 3, the pilot control loop comprises a pilot handle 7, an electromagnetic valve I8, a pressure relay 10 and the main control valve 4 in the main operation loop, and the feedback control loop comprises a connecting electromagnetic valve II 9, the hydraulic pump 2 in the main operation loop and the main control valve 4. And the solenoid valve I8 and the solenoid valve II 9 are both two-position three-way solenoid valves. According to the invention, the solenoid valve I8 is controlled by the button, so that the main winch can automatically shake up and down, the action response of the main winch is sensitive, the clay attached to the drilling tool can be easily shaken off, manual operation is not needed, the dependence on an operator is reduced, and the construction efficiency is improved.

An oil supply port P1 of the hydraulic pump 2 is connected with a port P of the main control valve 4, a port A and a port B of the main control valve 4 are connected with an oil inlet of the balance valve 5, an oil outlet of the balance valve 5 is connected with an oil inlet and an oil outlet of the main winch motor 6, and a port T of the main control valve 4 is connected with the oil tank 3 to form a main operation loop.

The oil inlet of solenoid valve I8 is connected with the promotion hydraulic fluid port of guide's handle 7, the oil-out of solenoid valve I8 is connected with the promotion pilot oil port Xb1 of main control valve 4, and the oil return opening of solenoid valve I8 is connected with oil tank 3, the hydraulic fluid port of transferring of guide's handle 7 is connected with the hydraulic fluid port Xa1 of transferring of main control valve 4, pressure relay 10 is connected on the promotion hydraulic fluid port of guide's handle 7 for detect the promotion action, constitute the pilot control return circuit.

An oil inlet of the electromagnetic valve II 9 is connected with a feedback oil port N1 of the main control valve 4, an oil outlet of the electromagnetic valve II 9 is connected with a feedback oil port Pi of the hydraulic pump 2, and an oil return port of the electromagnetic valve II 9 is connected with the oil tank 3 to form a feedback control loop.

The control method of the main hoisting system of the rotary drilling rig comprises the following operation methods:

a. the pilot handle 7 is reversed to a lifting position and is controlled by a button, and the electromagnetic valve I8 is powered on and powered off within a period time; in each period, the electromagnetic valve I8 is powered on and powered off once, and the power-on time and the power-off time are different numerical values;

b. the electromagnetic valve II 9 is continuously electrified, and the hydraulic pump 2 is always maintained in the maximum displacement state.

In the step a, when the pilot handle 7 is reversed to a lifting position, if the electromagnetic valve I8 is in a power-off state, a lifting oil port of the pilot handle 7 is communicated with a lifting pilot oil port Xb1 of the main control valve 4, the main control valve 4 is opened, and the hydraulic pump 2 supplies oil for the main hoisting motor 6; if the electromagnetic valve I8 is in an electrified state, a lifting pilot oil port Xb1 of the main control valve 4 is communicated with the oil tank 3, the main control valve 4 is closed, and the lifting action of the main winch is stopped;

in the step b, when the main control valve 4 is closed, if the electromagnetic valve II 9 is in a power-off state, the feedback oil port N1 of the main control valve 4 is communicated with the feedback oil port Pi of the hydraulic pump, feedback pressure acts on the feedback oil port Pi of the hydraulic pump 2, and the hydraulic pump 2 is in a minimum displacement state; if the electromagnetic valve II 9 is in an electrified state, the feedback oil port Pi of the hydraulic pump 2 is communicated with the oil tank 3, the feedback pressure is reduced, and the hydraulic pump 2 is in a maximum displacement state.

When the pilot handle performs the lifting action of the main winch, the two-position three-way electromagnetic valve 8 is powered on and powered off according to a set rule through button control, and a pilot oil path in the lifting direction is continuously switched on and off, so that the main winch is switched between a lifting state and a pause state back and forth, a drilling tool hung by the main winch can shake up and down according to a certain rule, clay attached to the drilling tool is easily shaken off, and the soil shaking effect is achieved; in the soil shaking process, the electromagnetic valve 9 is continuously electrified, and the hydraulic pump 2 is always maintained in the maximum displacement state. Because in the soil shaking process, the main control valve 4 can be opened and closed to change back and forth, the feedback pressure changes along with the change of the main control valve, the displacement of the hydraulic pump 2 can be changed back and forth, the response speed of the main hoisting action is influenced, and the soil shaking effect is not ideal.