CN110259737B

CN110259737B - Tensioning control hydraulic system and rotary drilling rig

Info

Publication number: CN110259737B
Application number: CN201910584197.0A
Authority: CN
Inventors: 李彬; 齐文虎; 许宏宇; 于卓伟
Original assignee: Beijing Sany Intelligent Technology Co Ltd
Current assignee: Beijing Sany Intelligent Technology Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2021-05-28
Anticipated expiration: 2039-06-28
Also published as: CN110259737A

Abstract

The invention relates to the field of engineering machinery, in particular to a tensioning control hydraulic system and a rotary drilling rig. A tensioning control hydraulic system comprises a pilot pressure sensor, a tensioning pressure sensor, a motor, a second reversing valve, an overflow valve and a first oil pump; the pilot pressure sensor is connected with a third oil pump through a third electromagnetic valve; the tensioning pressure sensor is connected with the motor through a second reversing valve; the motor is connected with the first and second oil pumps. Thus, the tensioning of the tensioning steel wire rope under various conditions can be completed.

Description

Tensioning control hydraulic system and rotary drilling rig

Technical Field

The invention relates to the field of engineering machinery, in particular to a tensioning control hydraulic system and a rotary drilling rig.

Background

The condition that the elevator inclines occasionally appears in the rotary drilling rig, and if the elevator inclines during drilling, the service life of the steel wire rope is influenced. At present, most rotary drilling rigs tension a main winch steel wire rope by adopting a main winch lifting mode, so that an elevator is kept in a vertical working state. This will cause the following problems:

1. when the main winch is used for transferring, the steel wire rope is tensioned in a lifting mode of the main winch, and the main pump is large in flow and not easy to control, so that the situation of repeatedly lifting and transferring is easy to occur.

2. In the drilling process, the steel wire rope is tensioned in a main winch lifting mode, and the main winch and the power head are supplied with oil by main pumps, so that the main winch and the power head act in a combined manner, and the drilling speed of the power head is seriously influenced.

Disclosure of Invention

The invention aims to provide a tension control hydraulic system which can complete the tension of a tension steel wire rope under various conditions.

Another object of the invention comprises that a rotary drilling rig comprising the tension control hydraulic system is provided.

The embodiment of the invention is realized by the following technical scheme:

a tensioning control hydraulic system comprises a pilot pressure sensor, a tensioning pressure sensor, a motor, a second reversing valve, an overflow valve, a first oil pump and a third oil pump;

the pilot pressure sensor is connected with the third oil pump through the third electromagnetic valve; the tensioning pressure sensor is connected with the motor through the second reversing valve;

the motor is connected with the first oil pump.

In one embodiment of the invention:

the above further includes a second reversing valve and a second oil pump,

the second oil pump is connected with the motor through the second reversing valve.

In one embodiment of the invention:

the device also comprises a first electromagnetic valve and a second electromagnetic valve,

the first electromagnetic valve and the second electromagnetic valve are respectively connected with two ends of the second reversing valve.

In one embodiment of the invention:

the tension pressure sensor is connected with the pressure sensor through the overflow valve.

In one embodiment of the invention:

the above further includes a third oil pump,

and the third oil pump is connected with the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve.

In one embodiment of the invention:

the first oil pump is a one-way variable hydraulic pump.

In one embodiment of the invention:

the above further includes a first one-way valve,

the first check valve is disposed between the tension pressure sensor and the motor.

In one embodiment of the invention:

the foregoing further includes a third directional valve disposed between the first directional valve and the motor.

In one embodiment of the invention:

the motor is a bidirectional variable motor.

A rotary drilling rig comprises the tension control hydraulic system.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

when the steel wire rope needs to be tensioned, a motor is adopted for supplying oil, so that the condition of linkage with other actions is prevented; the reversing valve is adopted to control the lifting flow of the main winch, so that the lifting action of the main winch is carried out at a controllable speed; the overflow valve is adopted to control the pressure value in the oil lifting path of the main winch, so that the constant tension of the steel wire rope of the main winch can be kept all the time in the drilling process of the rotary drilling rig, and the elevator inclination caused by the over-discharge of the steel wire rope is prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a first schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a second structural diagram according to the embodiment of the present invention;

fig. 3 is a schematic diagram of a third structure according to the embodiment of the invention.

Icon: 10-tensioning control hydraulic system; 11-a tension pressure sensor; 12-a pilot pressure sensor; 13-a motor; 14-relief valves; 111-a first directional valve; 112-a second reversing valve; 121-a first oil pump; 122-a second oil pump; 123-a third oil pump; 131-a first solenoid valve; 132-a second solenoid valve; 133-a third solenoid valve; 141-a first one-way valve; 142-third direction valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The condition that the elevator inclines occasionally appears in the rotary drilling rig, and if the elevator inclines during drilling, the service life of the steel wire rope is influenced. Through the analysis of the construction state of the rotary drilling rig, the inclination of the elevator is known to mainly occur in the following two working stages:

firstly, in the process of lowering the main winch, in order to improve the working efficiency, a manipulator generally lowers the main winch quickly, and the situation that the steel wire rope of the main winch is over-lowered inevitably occurs due to the reversing delay of the main valve of the rotary drilling rig and the braking delay of the speed reducer of the main winch, so that the elevator inclines;

in the drilling process, unreasonable pressurizing action and shaking of the drilling machine cause over-discharge of the steel wire rope, and the elevator inclines;

at present, most rotary drilling rigs tension a main winch steel wire rope by adopting a main winch lifting mode, so that an elevator is kept in a vertical working state. This will cause the following problems:

firstly, when the main winch is used for transferring, the steel wire rope is tensioned in a lifting mode of the main winch, and the main pump is large in flow and not easy to control, so that the situation of repeatedly lifting and transferring is easy to occur.

Secondly, in the drilling process, the steel wire rope is tensioned by adopting a main winch lifting mode, and the main winch and the power head are supplied with oil by adopting main pumps, so that the main winch and the power head act in a combined manner, and the drilling speed of the power head is seriously influenced.

Therefore, a technology for tensioning the steel wire rope of the main winch by adopting an automatic control technology in the process of lowering the main winch or drilling is urgently needed. To overcome the above problems, a tension control hydraulic system 10 is provided in the following embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a tension control hydraulic system 10 according to an embodiment of the present invention. It can be seen from fig. 1 that a tension control hydraulic system 10 comprises a tension pressure sensor 11, a pilot pressure sensor 12, a motor 13, an overflow valve 14 and a second directional valve 112, as well as a first oil pump 121 and a third oil pump 123.

The pilot pressure sensor 12 is connected to the third oil pump 123 through a third electromagnetic valve 133;

the tension pressure sensor 11 is connected with the motor 13 through a second reversing valve 112;

the motor 13 is connected to the first oil pump 121.

When the cable tensioning device is used, the motor 13 is used for supplying oil when the steel wire rope needs to be tensioned, so that the situation of linkage with other actions is prevented; the reversing valve is adopted to control the lifting flow of the main winch, so that the lifting action of the main winch is carried out at a controllable speed; the overflow valve 14 is adopted to control the pressure value in the oil lifting path of the main winch, so that the constant tension of the steel wire rope of the main winch can be always kept in the drilling process of the rotary drilling rig, and the elevator inclination caused by the over-discharge of the steel wire rope is prevented. Therefore, the steel wire rope can be kept in a tensioning state under different working conditions.

Please continue to refer to fig. 1 to fig. 3 to understand more structures.

Optionally, the above-mentioned further includes a second direction valve 112 and a second oil pump 122, and the second oil pump 122 is connected to the motor 13 through the second direction valve 112. The separate second oil pump 122 provides another independent working source for the operation of the second direction valve 112, and thus, the stable reliability of the operation of the second direction valve 112 is ensured; on the other hand, the problem of insufficient oil pressure during inclined operation and other conditions is avoided by the plurality of oil sources, and the stability of the control process is ensured.

Optionally, the above-mentioned further includes a first electromagnetic valve 131 and a second electromagnetic valve 132, and the first electromagnetic valve 131 and the second electromagnetic valve 132 are respectively connected to two ends of the second direction valve 112. The first and

second solenoid valves

131 and 132 control the ascending and descending of the main winch, respectively, and the separate control can improve the reliability and stability of the system.

Optionally, the system further comprises an overflow valve 14, and the overflow valve 14 is connected with the tension pressure sensor 11.

Further, the above-mentioned further includes a third oil pump 123, and the third oil pump 123 is connected with the first solenoid valve 131, the second solenoid valve 132 and the third solenoid valve 133. Therefore, more choices are provided for the working of the oil pump, and the stability of the system is improved.

Alternatively, the first oil pump 121 is a one-way variable hydraulic pump.

Optionally, the above-mentioned further includes a first check valve 141, and the first check valve 141 is disposed between the tension pressure sensor 11 and the motor 13. The first check valve 141 can well regulate the reverse winding operation of the main winch, and the independent oil source can also ensure the stability of the operation.

Optionally, the above-mentioned further includes a third direction-changing valve 142, and the third direction-changing valve 142 is disposed between the first direction-changing valve 111 and the motor 13. Thus, the problem of oil backflow under special conditions is guaranteed.

Alternatively, the motor 13 is a bidirectional variable motor.

When the tool is used, 1, the drilling depth is less than 1m, the tool is in a disassembly and assembly mode, the tool is in a non-bottoming protection state, and the reversing valves are in a power-off state;

2. the main winch descending electromagnetic valve is electrified, and the main winch descends.

3. And after the drilling bucket of the rotary drilling rig touches the bottom, the main winch stops descending.

4. Push float button (program decision) or push head rotation action. The reversing valve and the overflow valve 14 are electrified.

5. The motor 13 provides pressure oil, and the oil source realizes the function of automatically lifting the main winch along a schematic diagram. And lifting the main winch to the target tension value of the main winch.

6. And continuing to perform the drilling work until the main winch is lifted, powering off the reversing valve, and finishing the tensioning control technical process of the main winch. The embodiment of the invention also provides a rotary drilling rig, which comprises any one of the tension control hydraulic systems 10.

Therefore, when the steel wire rope needs to be tensioned, the reversing valve is adopted to control the lifting flow of the main winch, so that the tensioning of the steel wire rope of the main winch is controlled in a micro-motion mode.

When the steel wire rope needs to be tensioned, the overflow valve 14 is adopted to control the pressure value in the oil lifting way of the main winch, so that the steel wire rope can always keep constant tensioning force no matter what depth the rotary drilling rig drills.

when the steel wire rope needs to be tensioned, an independent oil source is adopted to supply oil for the lifting action of the main winch, so that the condition of linkage with other actions is prevented;

when the steel wire rope needs to be tensioned, the reversing valve is adopted to control the lifting flow of the main winch, so that the lifting action of the main winch is carried out at a controllable speed;

when the steel wire rope needs to be tensioned, the overflow valve 14 is adopted to control the pressure value in the oil lifting way of the main winch, so that the constant tensioning force of the steel wire rope of the main winch can be always kept in the drilling process of the rotary drilling rig, and the elevator inclination caused by the over-discharge of the steel wire rope is prevented

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tension control hydraulic system characterized by:

the hydraulic control system comprises a pilot pressure sensor (12), a tension pressure sensor (11), a motor (13), a first reversing valve (111), a second reversing valve (112), a third electromagnetic valve (133), a first oil pump (121) and a third oil pump (123);

the pilot pressure sensor (12) is connected to the third oil pump (123) via the third solenoid valve (133);

the tensioning pressure sensor (11) is connected with the motor (13) through the second reversing valve (112);

the motor (13) is connected with the first oil pump (121);

also comprises a second reversing valve (112) and a second oil pump (122),

the second oil pump (122) is connected with the motor (13) through the second reversing valve (112); when the steel wire rope needs to be tensioned, the motor is adopted for supplying oil, so that the condition of linkage with other actions is prevented; the overflow valve is adopted to control the pressure value in the oil lifting path of the main winch, so that the constant tension of the steel wire rope of the main winch can be kept all the time in the drilling process of the rotary drilling rig, and the elevator inclination caused by the over-discharge of the steel wire rope is prevented.

2. The tension control hydraulic system of claim 1, wherein:

also comprises a first electromagnetic valve (131) and a second electromagnetic valve (132),

the first electromagnetic valve (131) and the second electromagnetic valve (132) are respectively connected with two ends of the first reversing valve (111).

3. The tension control hydraulic system of claim 1, wherein:

also comprises a relief valve (14),

the overflow valve (14) is connected with the tensioning pressure sensor (11).

4. The tension control hydraulic system of claim 2, wherein:

the third oil pump (123) is connected to the first solenoid valve (131), the second solenoid valve (132), and the third solenoid valve (133).

5. The tension control hydraulic system according to any one of claims 1 to 4, characterized in that: the first oil pump (121) is a one-way variable hydraulic pump.

6. The tension control hydraulic system according to any one of claims 1 to 4, characterized in that: further comprising a first one-way valve (141),

the first check valve (141) is disposed between the tension pressure sensor (11) and the motor (13).

7. The tension control hydraulic system according to any one of claims 1 to 4, characterized in that: and the motor also comprises a third reversing valve (142), wherein the third reversing valve (142) is arranged between the first reversing valve (111) and the motor (13).

8. The tension control hydraulic system of claim 1, wherein:

the motor (13) is a bidirectional variable motor (13).

9. A rotary drilling rig is characterized in that:

the rotary drilling rig comprises the tension control hydraulic system of any one of claims 1-8.