CN101137818A - Rock drilling device and drilling rig incorporating a device for measuring the position of a drilling machine - Google Patents

Abstract

The invention relates to a rock drilling device, comprising a supply beam (4) having a drilling end (41) from which a drill tip projects during drilling, and a rear end (42) opposite the drilling end; a rock drilling machine (5) movable along the supply beam; a pressure cylinder (6) at least partially arranged in the supply beam (4), one end (622) of which is movable relative to the supply beam (4) and one end of which is fixed relative to the supply beam (4); a supply line (51) driven by the pressure cylinder (6) and connected to the drilling machine (5) for feeding it back and forth along the supply beam (4), characterized in that the fixed end (611) of the pressure cylinder (6) is arranged at the rear end of the supply beam (4), and the supply line (51) extends over two outer pulleys (52, 53) fixedly arranged at each end (42, 41) of the supply beam, the pressure cylinder (6) being suitable for feeding the drilling machine (5) back and forth along the supply beam (4) via the supply line (51). The invention also relates to a drilling device comprising the rock drilling device.

Description

Rock drilling device and drilling equipment incorporating a device for measuring the position of the drilling machine

technical field

The invention relates to a drilling device according to the preambles of the independent claims. The invention also relates to a drilling rig comprising such a drilling device.

Background technique

One of the most important characteristics of drilling equipment is its durability and reliability. All components of the equipment need to meet the high demands required in the extreme work operations of drilling equipment. Equally important is its precision to withstand these conditions. As a result, improvements to improve the durability, accuracy and reliability of this device are ongoing.

Typically (see FIG. 1 ), a rock drilling rig comprises a movable carrier 1 , a boom 2 and a supply beam 4 connected to the boom 2 via a supply beam holder 3 . The supply beam 4 and the supply beam holder 3 move relative to each other along at least part of the length of the supply beam. A drilling machine 5 is movably arranged on the supply beam 4 . With one open side, a channel beam is usually used as a supply beam in which the drilling machine can slide and an opening is provided through which a drive is connected to the drilling machine for moving the drilling machine back and forth along the supply beam.

Since the supply beam is exposed to great mechanical stress during operation, its structural strength is very important. However, there are restrictions on the size and weight of the supply beam in order to make it manoeuvrable. It is therefore desirable to use alternative beam constructions that have higher structural strength than open channel beams, but have the same thickness as, or even be thinner than, the channel beams. These features are provided by box girders. But the use of a box beam as a closed beam means that the supply of the drilling machine needs to be configured in a selective manner, since between the inside where the drive is preferably arranged and the outside where the drilling machine is slidingly arranged along the The supply beam is not connected. Traditionally, when using a box beam, the drive is configured to drive a gear shaft connected to the drilling machine via sprockets and chains. This arrangement is schematically represented in Figure 2, where a drilling machine 5' is slidably arranged via a sliding element 50' on a box supply beam 4'. A chain 51' driven by the supply motor 6' is used to move the drilling machine 5' in the direction of arrows A, B along the supply beam. The chain runs on two sprockets 52', 53' arranged at each end 41', 42' of the supply beam 4', whereby a part of the chain 51' can extend inside the beam. This configuration enables box beams to be used instead of channel beams since no connection is required along the supply beam between the interior of the supply beam and the drilling machine.

However, it has proven advantageous to use pressure cylinders to move the drilling machine along the supply beam in order to provide a more reliable and constant supply.

US 6550544B1 discloses a rock drilling arrangement in which pressure cylinders are used to provide means for moving the drilling machine along a supply beam. In this configuration, the supply line runs over a pulley arranged at the movable end of the pressure cylinder. As mentioned above, this configuration cannot be used in box girders.

Contents of the invention

The main object of the present invention is to provide an arrangement which overcomes said drawbacks and makes it possible to use pressure cylinders to move the drilling machine along the closed supply beam. Another object of the invention is to improve the efficiency of the pressure cylinder so that the power applied by it can be utilized to the greatest extent. This is solved by the features stated in the characterizing parts of the independent claims.

Preferred embodiments of the invention are presented in the dependent claims.

According to a main aspect, the invention relates to a rock drilling apparatus comprising a supply beam having a drilling end from which a drill point protrudes when drilling and a rear end opposite said drilling end; A rock drilling machine that moves along a supply beam; a pressure cylinder at least partially disposed within the supply beam, one end of which is movable relative to the supply beam and one end of which is fixedly disposed relative to the supply beam. The supply line is driven by pressure cylinders and is attached to the drilling machine so that it feeds back and forth along the supply beam. The fixed ends of the pressure cylinders are arranged at the rear end of the supply beam, and the supply lines run over two outer pulleys fixedly arranged at each end of the supply beam.

This configuration makes it possible to use pressure cylinders inside the box girder, whereby the advantages of box girders and pressure cylinders can be combined in one embodiment. In addition, the power of the pressure cylinder that is fixed on the rear end of the supply beam instead of the borehole end can be used more efficiently. The pressure cylinder applies more power when pulling the bit out of the ground than when pushing the bit into the ground.

These and other aspects of the invention will become apparent from the detailed description and accompanying drawings.

Description of drawings

In the detailed description of the invention, reference is made to the accompanying drawings, in which:

Figure 1 is a schematic diagram of a rock drilling rig;

Figure 2 is a schematic illustration of a supply beam with a prior art drive mechanism;

Figure 3 is a schematic diagram of a supply beam with a drilling machine driven by a pressure cylinder of the present invention;

Figure 4 is a cross-sectional view taken along line 4-4 of Figure 3, showing a supply beam with the drilling machine of the present invention;

Figure 5 is a cross-sectional view taken along line 5-5 of Figure 3, showing a supply beam with the drilling machine of the present invention.

Detailed ways

As mentioned above, FIG. 1 shows a schematic view of a rock drilling rig comprising a movable carriage 1 , a boom 2 and a supply beam 4 connected to the boom 2 via a supply beam holder 3 . The supply beam and supply beam holder 3 are relatively movable along at least part of the length of the supply beam 4 . A drilling machine 5 is movably connected to the supply beam 4 and is movable along the supply beam in order to affect the drill string 10 . The drill string 10 includes a drill tip (drill bit) and connecting rods (not shown). Other devices connected to the supply beam 4 may be devices for rod operation.

Referring now to FIG. 3 , the supply beam 4 has a drilling end 41 from which the drill tip protrudes when drilling, and a rear end 42 opposite the drilling end 41 . A pressure cylinder 6 is arranged inside the supply beam 4 . The pressure cylinder 6 is adapted to drive the drilling machine 5 back and forth along the supply beam using the supply line 51 . The supply line may be a chain or steel wire, or other line that is strong and strong enough. In a preferred embodiment of the invention steel wire is used as the supply line. In practice, it is advantageous to use two supply lines, one on each side of the drilling machine, fixed on the opposite side of the drilling machine. But apart from the fastening arrangement for fastening one or more supply lines on the drilling machine, the number of supply lines does not affect the general concept to which the invention relates. Suitable fastening arrangements are well known in the art, and therefore this is simply covered by the present invention.

Means 52, 53, 54, 55 for the low-friction passage of the supply line 51 are arranged at both ends of the supply beam and inside it. Preferably these means include wheels or pulleys 52, 53, 54, 55 with internal bearings providing low friction with the respective shafts. The term pulley used in the present invention should be interpreted broadly, without excluding any other type of known device suitable for low-friction passage of supply lines.

The pressure cylinder 6 may be of any conventional form involving two cylinders, an outer cylinder 61 and an inner cylinder 62 sliding hydraulically within the outer cylinder. The outer cylinder 61 has an outer end 611 preferably fixedly arranged on the rear end 42 of the supply beam and an inner end 612 from which the inner cylinder 62 extends. Naturally, and within the scope of the invention defined by the appended claims, the invention is not limited to the use of only one pressure cylinder 6, but two or more pressure cylinders configured to achieve the desired movement may be used any suitable combination. The pressure cylinders may be arranged at the same end of the supply beam or at opposite ends. However, as shown in the preferred embodiment of Figure 3, where a pressure cylinder is disposed at the rear end, the additional power applied as it expands can be used to pull the drill out of the surface. When the drill is pushed into the ground, the main work is done by drilling the hole made by the drilling machine, the power supplied by retracting the pressure cylinder is therefore sufficient. Yet another option is to fix the inner cylinder to the supply beam and leave the outer cylinder free to move. But it is advantageous from a mechanical point of view to attach a heavier outer cylinder and move the inner cylinder back and forth.

The inner cylinder 62 has one end always inside the outer cylinder. The other end 622 of the inner cylinder is provided with a holder 625 receiving the two pulleys 54, 55 over which the supply line passes. One end of the supply line 51 is secured to fixing means 511 and 512 of conventional type, also comprising tensioning means (not shown) to avoid any slack in the supply line. The first fixing device 511 is disposed on the inner end 612 of the outer cylinder 61 . From this first fixture 511 the supply line passes through the pulley 55 closest to the two pulleys on the holder 625 arranged on the inner cylinder to the pulley 52 at the drilling end where it leaves the supply beam and gradually reaches the drilling machine 5 . The supply line 51 continues on the other side of the drilling machine and passes the pulley 53 at the rear end 42 of the supply beam where it enters the supply beam 4 and then passes the frontmost of the two pulleys on the holder 65 on the inner cylinder The second end of the pulley is fixedly arranged on the second fixing device 512 . Therefore, the supply line runs mostly inside the supply beam. Typically, the only part extending outside the supply beam is the part connected to the drilling machine 5, between the two pulleys 52, 53 at the respective ends 42, 41 of the supply beam.

Referring to FIGS. 4 and 5 , which are cross-sectional views taken along lines 4 - 4 and 5 - 5 of FIG. 3 , respectively, the drilling machine is arranged on the slide 43 by means of bolts 56 . The slide plate holds the slide element 50 via bolts 58 . Each sliding element comprises two contact elements 45 of low frictional resistance, which slide directly on the supply beam 4 . The supply lines are connected to the slide 43 by fastening arrangements 57 placed under the slide 43 . When using two supply lines each on each side of the drilling machine, the ends of these supply lines are preferably fastened to two separate fastening arrangements 57 at each side of the slide 43. If only one supply line is used, only one fastening configuration is required. But in order to maintain accurate supply it is important that the fastening arrangement is tight enough that the pulley as well as the drilling mechanism in both directions respond directly to any motion imposed on them by the pressure cylinder via the supply line.

The pressure cylinder has an outer housing 63 that fits snugly within the supply beam. The interior of the supply beam 4 is provided with recesses 46 for mounting housing protrusions 66 . An outer cylinder 61 is attached inside the housing 63, while a smaller inner cylinder 62 is arranged to slide within the outer cylinder 61 under the influence of hydraulic fluid.

Figure 4 shows how the holder 625 is slidably arranged within the supply beam. The holder holds two pulleys 54, 55 over which the supply line extends. The pulley is arranged on the shaft 627 via a bearing 541 . The holder 625 is provided on both sides with protrusions 626 arranged to slide within the notches 46 of the supply beam. The protrusion 626 guides the movable end 622 of the inner cylinder 62 within the supply beam 4 . In order not to wear the cylinders they are preferably provided with a low friction coating and preferably they are interchangeable and softer than the beam material so that the lugs wear instead of the beams.

This arrangement with two outer pulleys 52, 53 at the respective ends of the supply beam makes it possible to use a box beam as the supply beam, and the pulleys 52, 53 in addition constitute a means for measuring the exact position of the drilling machine along the supply beam. Ideal location for measuring devices. Measuring devices can be placed on either or both outer pulleys. However, in a preferred embodiment, the measuring device is placed on the extension of the shaft 9 of the rear pulley 52 as shown in Tu. The placement of the measuring device is indicated by arrow 7. In order for this arrangement to work, the pulley 52 must be fixedly arranged on the shaft 9 such that the shaft and the pulley 52 rotate together. The movement of the supply line 51 as well as the drilling machine 5 can then be monitored by measuring the rotation of the shaft.

The described configuration, in which the pressure cylinders are arranged at the rear end of the supply beam, naturally also applies to the box-type supply beam as channel supply beam.

Claims (8)

1. rock-boring device, this device comprises feed beam (4), feed beam has apex point therefrom stretches out when boring drill end (41) and the rear end (42) relative with described drill end; The rock-boring machine (5) that can move along feed beam; Pressure cylinder (6) is configured in the feed beam (4) to small part, and one end (622) can be with respect to feed beam (4) motion, and an end is with respect to feed beam (4) fixed configurations; Supply line (51), drive by pressure cylinder (6), and be connected on the boring machine (5), so that it is supplied back and forth along feed beam (4), be characterised in that, the fixed end (611) of pressure cylinder (6) is configured in the rear end of feed beam (4), and extends on the pulley (52,53) outside the supply line (51) locate at every end (42,41) of feed beam in fixed configurations two, and pressure cylinder (6) is applicable to via described supply line (51) supply the machine (5) of holing back and forth along feed beam (4).

2. rock-boring device as claimed in claim 1, it is characterized in that, two interior pulleys (54,55) are arranged in feed beam (4) on the movable end (622) of pressure cylinder (6), and supply line (51) is arranged to make it to pass through two end points (512,511) of its fixed and arranged from outer pulley (52,53) on interior pulley (54,55).

3. rock-boring device as claimed in claim 1 or 2, it is characterized in that, pressure cylinder (6) comprises two cylinders (61,62), i.e. the inner casing (62) that in outer shell (61), extends of an outer shell (61) and, and wherein the outer shell fixed and arranged is located in the rear end (42) of feed beam (4).

4. as each described rock-boring device of above-mentioned claim, it is characterized in that feed beam is a box beam.

5. as each described rock-boring device of above-mentioned claim, it is characterized in that, measure boring machine (5) and be arranged in one or two outer pulley (52,53) with respect to the measurement mechanism of the position of feed beam and locate.

6. rock-boring device as claimed in claim 5 is characterized in that, measurement mechanism is arranged on the axle (9) of outer pulley (52,53), and pulley (52,53) and axle (9) formation integral body, makes one play rotation.

7. rock-boring device as claimed in claim 6 is characterized in that measurement mechanism is arranged on the extension.

8. one kind comprises the drilling equipment as each described rock-boring device of above-mentioned claim.