KR20110116423A - Apparatus for driving kelly bar of rotary drilling rig - Google Patents

Abstract

The present invention relates to a rotary drilling rig, and more particularly to a drive device for driving a kelly bar of a rotary drilling rig.
The kelly bar drive device of the rotary drilling rig according to the present invention comprises: a main gear having a circular hole for mounting and rotating the kelly bar assembly; A pinion gear engaged at the side of the main gear to transmit rotational force from the drilling motor; A rotary encoder connected to the bottom of the gear shaft of the pinion gear to sense a rotational speed of the pinion gear; And a speed reducer connected to the top of the gear shaft of the pinion gear to adjust the rotation speed of the pinion gear according to the rotation speed detected by the rotary encoder.
Kelly bar driving device of the rotary drilling rig according to the present invention can prevent the frequent maintenance and breakage of the sensing device by the excavation operation, there is an effect that can accurately and accurately measure the excavation rotation speed.

Description

Kelly bar drive unit of rotary drilling rig {APPARATUS FOR DRIVING KELLY BAR of ROTARY DRILLING RIG}

The present invention relates to a rotary drilling rig, and more particularly to a drive device for driving a kelly bar of a rotary drilling rig.

In general, rotary drilling rigs are defined as excavation devices that drill holes lower than the ground in civil engineering, and are widely used for drilling holes in the ground or for breaking or breaking rocks. To form a narrow and deep hole from the ground, a rod called a kelly bar is fitted with a cutting tool that breaks the ground or rock and the rod is rotated to form a narrow and deep hole from the ground.

On the other hand, the rotary drilling rig conventionally uses a rotational speed sensing device to measure the rotational speed when the kelly bar is rotated, that is, revolution per minute (hereinafter referred to as RPM). For example, there is a device for measuring the rotation speed by installing a proximity sensor on the teeth of the main gear inside the drive device for rotating the kelly bar to calculate the number of gear teeth.

However, due to the excavation work, foreign matter is often attached to the proximity sensor, so frequent maintenance is required, and in some cases, the proximity sensor is broken. In addition, the number of rotations measured varies depending on the installation position of the proximity sensor, and there is a problem that accurate and precise measurement is difficult even with the proximity sensor itself. In addition, there is a problem that it is difficult to accurately measure the RPM and precisely control the excavation rotation speed of the rotary drilling rig.

The present invention has been made to solve the above problems, an object of the present invention is to provide a kelly bar drive device of the rotary drilling rig that can prevent frequent maintenance and breakage of the sensing device by the excavation work, which is a heavy equipment work.

It is also an object of the present invention to provide a kelly bar drive device of a rotary drilling rig which can accurately and accurately measure the excavation rotation speed of the rotary drilling rig.

It is also an object of the present invention to provide a kelly bar drive device of a rotary drilling rig that can accurately and precisely control the excavation rotation speed of the rotary drilling rig.

The problem to be solved by the present invention is not limited to the above-mentioned problem, another problem to be solved by the present invention not mentioned here is apparent to those skilled in the art from the following description. Can be understood.

The kelly bar drive device of the rotary drilling rig according to the present invention comprises: a main gear having a circular hole for mounting and rotating the kelly bar assembly; A pinion gear engaged at the side of the main gear to transmit rotational force from the drilling motor; A rotary encoder connected to the bottom of the gear shaft of the pinion gear to sense a rotational speed of the pinion gear; And a speed reducer connected to the top of the gear shaft of the pinion gear to adjust the rotation speed of the pinion gear according to the rotation speed detected by the rotary encoder.

In addition, the kelly bar driving device of the rotary drilling rig of the present invention is characterized in that it further comprises an encoder cover to form a cap shape projecting downward so that the rotary encoder is seated, to seal and protect the rotary encoder from the outside.

In addition, the kelly bar drive device of the rotary drilling rig of the present invention is characterized in that it further comprises an increaser connected between the gear shaft of the pinion gear and the rotary encoder, increasing the sensed rotational speed at a constant rate.

In addition, the speed increaser of the present invention includes a first speed increase gear connected in line with a gear shaft of the pinion gear, a second speed increase gear that meshes with the first speed increase gear to increase the rotational speed at a first constant speed, and a second speed increase And a third speed increasing gear meshed with the gear and connected in series with the rotary encoder to increase a rotation speed at a second constant speed.

In addition, the kelly bar driving apparatus of the rotary drilling rig of the present invention, if the rotation speed detected from the rotary encoder is different from the preset rotation speed, further includes a control unit for transmitting a rotation speed control signal for adjusting to the set rotation speed to the reducer Characterized in that.

In addition, the control unit of the present invention, characterized in that for transmitting the interlock signal to the reducer when the detected rotation speed is more than the overload rotation speed.

In addition, the rotary encoder of the present invention further detects the rotational direction of the pinion gear, the kelly bar driving device of the rotary drilling rig of the present invention, characterized in that it further comprises a display for displaying the detected rotational speed and rotational direction do.

By the means for solving the above problems, the kelly bar drive device of the rotary drilling rig according to the present invention has the effect of preventing frequent maintenance and damage of the sensing device by the excavation work.

In addition, the kelly bar driving device of the rotary drilling rig according to the present invention has the effect of accurately and precisely measuring the excavation rotation speed of the rotary drilling rig.

In addition, the kelly bar driving device of the rotary drilling rig according to the present invention has the effect of accurately and precisely controlling the excavation rotation speed of the rotary drilling rig.

1 is a view for explaining a rotary drilling rig according to an embodiment of the present invention.
2 is a side view and a bottom view of a kelly bar drive device of a rotary drilling rig according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of the Kelly bar driving device of the rotary drilling rig according to the exemplary embodiment of the present invention, taken by cutting line aa 'in FIG.
4 is a view for explaining the control operation of the kelly bar drive device of the rotary drilling rig according to an embodiment of the present invention.
5 is a diagram illustrating a screen displayed on a display unit according to an exemplary embodiment of the present invention.

Specific matters including the problem to be solved, the solution to the problem, and the effects of the present invention as described above are included in the following embodiments and the drawings. Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a view for explaining a rotary drilling rig according to an embodiment of the present invention.

As shown in FIG. 1, the rotary drilling rig 1000 includes a base machine 100, a mast 200, a first winch 300, a kelly bar assembly 400, a second A winch 500 and a kelly bar drive 600.

The base machine 100 provides or recovers fluid pressure and transfers the mast 200 to the first winch 300, the kelly bar assembly 400, the second winch 500, and the kelly bar drive device 600. And a control booth in which the operator can control all functions of the rotary drilling rig 1000.

The mast 200 is coupled to the base machine 100. In one embodiment of the invention, the mast 200 has a columnar shape standing in a direction perpendicular to the ground. The mast 200 may be coupled to the cylinder rod 115 of the hydraulic cylinder 110 connected to the base machine 100 to be inclined with respect to the ground. The mast 200 having a columnar shape has a guide rail 210 for up-downing the kelly bar assembly 400 to be described later, and the mast 200 includes a first pulley 220 and a second pulley 230. Is placed.

Two first pulleys 220 are installed at the bracket 215 fixed to the upper end of the mast 200, and the second pulley 230 is disposed at the lower end of the first pulley 220. The second pulley 230 is installed directly on the mast 200. The first pulley 220 is rotated about the first rotation shaft 225, and the second pulley 230 is rotated about the second rotation shaft 235.

The first winch 300 is fixed to the lower end of the mast 200. The first wire 310 is wound around the first winch 300, and the first wire 310 spans the first pulley 220. An end of the first wire 310 is connected to the kelly bar assembly 400 which will be described later, and the kelly bar assembly 400 has a hinge connection structure so as to be able to independently rotate with respect to the first wire 310.

The second winch 500 is fixed to the lower end of the mast 200, the second winch 500 winds up the second wire 510. The second wire 510 spans the second pulley 230 having a second axis of rotation 235.

The kelly bar driving device 600 is slidably disposed on the guide rail 210 of the mast 200. The kelly bar drive unit 600 is up-down along the guide rail 210. A second wire 230 spanning the second pulley 230 is coupled to the kelly bar driving device 600 so that the kelly bar driving device 600 can be up-down along the guide rail 210. In addition, the kelly bar drive device 600 includes a main gear having a circular hole, and the kelly bar assembly 400 is coupled thereto. The kelly bar assembly 400 includes a plurality of kelly bars, and a cutting unit 470 that performs excavation is disposed at a lower end of the kelly bar assembly 400.

2 and 3 are views for explaining a Kelly bar driving apparatus of a rotary drilling rig according to an embodiment of the present invention. Specifically, Figure 2 is a view showing the side and bottom of the kelly bar drive device of the rotary drilling rig according to an embodiment of the present invention, (a) is a side view of the kelly bar drive device (b) is a kelly bar drive Bottom view of the device. 3 is a cross-sectional view of the Kelly bar driving apparatus of the rotary drilling rig according to an embodiment of the present invention, cut out by the line a-a 'in FIG.

As shown in FIGS. 2 and 3, the kelly bar driving apparatus 600 according to an embodiment of the present invention may include a main gear 610, a pinion gear 620, a rotary encoder 630, and a speed reducer 640. Include.

The main gear 610 has a circular hole for mounting and rotating the Kelly bar assembly (400 of FIG. 1). That is, the main gear 610 is formed in a ring shape along the outer circumferential surface of the kelly bar assembly to rotate the kelly bar constituting the kelly bar assembly so that the kelly bar assembly is excavated. As such, if the rotational speed sensing device is directly installed on the Kelly bar assembly and the main gear 610 adjacent to the excavation operation, the accurate rotational speed can be detected. It is not easy to install, and as mentioned above, soil or rock debris due to excavation work is splashed or attached to the rotational speed sensing device, there is a risk of frequent maintenance and damage. Accordingly, in one embodiment of the present invention, the rotary encoder 630 is installed on the gear shaft of the pinion gear 620 in consideration of the above matters. A more detailed description thereof will be described later.

Pinion gear 620 meshes with the side of main gear 610 to transmit rotational force from drilling motor 650. Kelly bar drive device 600 according to an embodiment of the present invention can not arrange the drilling motor 650 on the same rotation axis as the main gear 610 due to its structural characteristics. Accordingly, the drilling motor 650 is disposed on the rotation axis that is in coordination with the main gear 610, and transmits the rotational force to the main gear 610 by the pinion gear 620. In this case, as shown in FIG. 2, the drilling motor 650, the pinion gear 620, and the reducer 640 are installed in a pair having the same or similar structure to provide sufficient rotational force to the main gear 610. On the other hand, it is sufficient to install the rotary encoder 630 in one pinion gear 620 of a pair.

The rotary encoder 630 is connected to the lower end of the gear shaft of the pinion gear 620 to sense the rotational speed of the pinion gear 620. The rotary encoder 630 is a type of rotation speed sensing device, and is a representative sensor used when measuring the rotation angle or the rotation speed of an electric motor or an engine. Incremental rotary encoders also generate pulses each time the axis rotates a certain amount of angle. That is, the angle of the axis can be detected by counting the number of pulses. An absolute rotary encoder can detect the absolute position of the axis by several signal lines. As such, the pinion gear 620 interlocked with the main gear 610 and the rotary encoder 630 connected directly on the gear shaft of the pinion gear 620 to generate pulses in conjunction with the rotation of the pinion gear 620. By using, accurate and reliable rotational speed can be detected. In addition, it is possible to prevent the risk of maintenance and damage by being mounted in a position that is not affected by the adhesion of foreign matters.

In addition, the kelly bar driving apparatus 600 according to the embodiment of the present invention forms a cap shape protruding downward so that the rotary encoder 630 is seated, and the encoder cover which seals and protects the rotary encoder 630 from the outside. It is possible to further include 631. Since the rotary drilling rig according to the exemplary embodiment of the present invention is used in an environment that is always exposed to external hazards such as a construction site, the encoder cover 631 may be provided to more reliably prevent the risk of damage to the rotary encoder 630. have. On the other hand, the rotary encoder 630 of the pinion gear 620 by the encoder adapter 632 for connecting the rotary encoder 630 and the encoder base 633 which forms the basis for mounting the rotary encoder 630. It is easily installed at the bottom.

In addition, the kelly bar driving device 600 of the rotary drilling rig according to an embodiment of the present invention is connected between the gear shaft of the pinion gear 620 and the rotary encoder 630, the detected rotational speed at a certain ratio It is possible to further include an increasing gearbox 660. The rotary encoder 630 is a sensing device capable of detecting a maximum of 10,000 pulses (revolutions) for 1 minute, and when the rotation speed of the pinion gear 620 is increased by a constant multiple, the rotation speed can be detected more precisely. In other words, changes in rotational speed in a short time can be detected by subdividing them.

The speed increaser 660 is engaged with the first speed increasing gear 661 and the first speed increasing gear 661 which is connected to the gear shaft of the pinion gear 620 to increase the rotational speed at the first constant speed. And a third speed increasing gear 662 to be engaged with the second speed increasing gear 662 and connected to the rotary encoder 630 in a straight line to increase the rotational speed at a second constant speed. It can be comprised easily. At this time, when the first constant speed is 3 times speed and the second constant speed is 3 times speed, the total normal speed is 9 times speed. Accordingly, the rotary encoder 630 can improve the rotation speed detection function by 9 times.

The reducer 640 is connected to the top of the gear shaft of the pinion gear 620 to adjust the rotation speed of the pinion gear 620 according to the rotation speed detected by the rotary encoder 630. The reducer 640 is connected to the lower end of the drilling motor 650 to adjust the transmission rotation speed from the drilling motor 650 to the pinion gear 620. At this time, in one embodiment of the present invention, it is possible to control the reducer 640 using the rotation speed detected by the rotary encoder 630. Accordingly, in one embodiment of the present invention it is possible to accurately and precisely control the excavation rotation speed, that is, the RPM of the rotary drilling rig. A more detailed description thereof will be described later with reference to FIGS. 4 and 5.

4 is a view for explaining the control operation of the kelly bar drive device of the rotary drilling rig according to an embodiment of the present invention.

As shown in FIG. 4, the Kelly bar driving device 600 of the rotary drilling rig according to the exemplary embodiment of the present invention includes a control unit 670 and a display unit 680 in addition to the rotary encoder 630 and the reducer 640. Include. In FIG. 4, the control unit 670 and the display unit 680 block and display the functions thereof. However, the control unit 670 and the display unit 680 may be implemented by a computer and a monitor installed in the control booth. That is, the kelly bar driving device according to the present invention is not limited to the kelly bar driving device 600 shown in FIGS. 1 to 4, and is defined as referring to all components that are organically configured to drive the kelly bar. .

The rotary encoder 630 generates a rotation speed detection signal.

The controller 670 generates and outputs a control signal of the reducer 640 based on the rotation speed detection signal. As an example, the controller 670 may transmit a rotation speed control signal to the reducer 640 to adjust the rotation speed if the rotation speed detected by the rotary encoder 630 is different from the preset rotation speed. Thereby, the constant speed digging operation | work which does not deviate from a preset rotational speed can be performed. In addition, the user can set the desired rotation speed to control the actual rotation speed with this rotation speed.

In addition, when the detected rotation speed is greater than the overload rotation speed, it is possible to transmit an interlock signal to the reducer 640. Accordingly, the reducer 640 can prevent the damage to the rotary drilling rig due to overload by performing a low speed operation or a stop operation.

In this way, the control unit 670 may perform an accurate and precise control operation by the detection signal, and may perform various rotation speed control operations.

The display unit 680 displays the detected rotation speed and rotation direction. Here, the rotary encoder 630 may detect the rotation direction of the pinion gear 620, and also transmits a rotation direction detection signal in addition to the rotation speed detection signal. Therefore, the user can utilize the correct information about the rotation speed and the rotation direction displayed on the display unit 680 well. For example, even in rainy weather or when the fog is severe, it is difficult for the user to secure a field of view through the display unit 680 to accurately check the information about the rotational speed and the direction of rotation.

5 is a diagram illustrating a screen displayed on a display unit according to an exemplary embodiment of the present invention. Specifically, Figure 5 (a) shows the rotational speed information displayed in RPM on the display unit. In FIG. 5A, only information on the rotational speed is displayed, but information about the rotational direction may also be displayed. In addition, Figure 5 (b) is a screen for adjusting the rotation speed of the main gear by setting the rotation speed value, RPM change value, deceleration ratio of the rotary encoder, which can be set by the control operation of the controller.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from an equivalent concept should be construed as being included in the scope of the present invention.

100: base machine
110: hydraulic cylinder
115: cylinder rod
200: mast
210: guide rail
215: bracket
220: first pulley
225: first rotating shaft
230: second pulley
235: second axis of rotation
300: first winch
310: first wire
400: Kelly Bar Assembly
470: cutting unit
500: second winch
510: second wire
600: Kelly Bar Drive Unit
610: main gear
620: Pinion Gear
630: Rotary Encoder
631: Encoder Cover
632: Encoder Adapter
633: Encoder Base
640: reducer
650: Drilling Motor
660 gearbox
661: first speed gear
662: second speed gear
663: third speed gear
670: control unit
680: display unit
1000: Rotary Drilling Rig

Claims (7)

A main gear having a circular hole for mounting and rotating the kelly bar assembly;
A pinion gear engaged with the side of the main gear to transmit rotational force from the drilling motor;
A rotary encoder connected to a lower end of the gear shaft of the pinion gear to sense a rotational speed of the pinion gear; And
A speed reducer connected to an upper end of a gear shaft of the pinion gear to adjust a rotation speed of the pinion gear according to a rotation speed detected by the rotary encoder;
Kelly bar drive of the rotary drilling rig comprising a. The method of claim 1,
Kelly bar driving device of the rotary drilling rig to form a cap shape protruding downward so that the rotary encoder is seated, and to seal and protect the rotary encoder from the outside. The method according to claim 1 or 2,
And a speed increaser connected between the gear shaft of the pinion gear and the rotary encoder to increase the sensed rotational speed by a predetermined ratio. The method of claim 3,
The decelerator,
A first speed increasing gear connected in series with the gear shaft of the pinion gear, a second speed increasing gear meshed with the first speed increasing gear to increase a rotation speed at a first constant speed, and engaged with the second speed increasing gear; And a third speed increase gear connected in series with the encoder to increase the rotational speed at a second constant speed. The method of claim 1,
If the rotational speed detected from the rotary encoder is different from the preset rotational speed, the Kelly bar drive of the rotary drilling rig further comprises a control unit for transmitting a rotational speed control signal for adjusting to the set rotational speed to the reducer Device. The method of claim 5,
And the controller transmits an interlock signal to the speed reducer when the detected rotation speed is equal to or greater than an overload rotation speed. The method of claim 1,
The rotary encoder further detects the rotation direction of the pinion gear,
Kelly bar driving device of the rotary drilling rig characterized in that it further comprises a display for displaying the detected rotation speed and direction of rotation.

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