FI121941B - A method for stiffening the structure of a rock drilling device and a protective structure of a rock drilling device - Google Patents

Description

A method for stiffening the structure of a rock drilling device and a protective structure of a rock drilling device

Background of the Invention

The invention relates to a method for stiffening the structure of a rock drilling device guard 5, which at least partially surrounds the drill bar, drilling machine or feeder of the rock drilling device.

A further object of the invention is a protective structure for a rock drilling device, the protective structure of which is intended to at least partially surround the drill bar, drill or feeder of the rock drilling device.

10 When drilling rock or rock, drilling equipment is typically used which has one or more booms mounted on a base and a drill machine movably mounted on the feed beam. Frequently, the feed beam is mounted movably at the end of the boom by a separate cradle so that it can be positioned in the desired position and direction for drilling. For these various movements of the boom and the feed beam, the rock drilling device has various transfer cylinders or hydraulic motors known per se, which can be driven by the pressure fluid.

Noise is generated during rock drilling. This noise is generated, at least mainly, by the action of the rock drill impactor and the subsequent impact of the tool 20 against the rock, and further by the effect of the rotational movement and any other action.

The resulting noise typically causes a variety of problems. This noise, which spreads quite widely into the environment, is causing more and more problems, especially near populated areas. In order to prevent noise from restricting working times or places, efforts have been made to solve this problem, in particular in surface drilling, by using various protective structures, such as noise reduction enclosures.

9 On the other hand, moving parts of the rock drilling machine also cause

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> - safety issues and risks may also be present 30 outsiders, for example, at work sites near the settlement. One way to improve the safety of the machine operator, other workers, and other people in the σί area is to protect moving parts with a protective structure that prevents access to moving parts too close to the machine during operation.

When drilling, the feed beam is subjected to high loading forces, 35 which cause the feed beam to bend and twist. In order to withstand these forces, the rigidity of the rock drilling unit and its components, including, for example, the feed beam, drill and various protective structures, must be adapted to the maximum load. When using so-called extension rod drilling, the waiting rods are typically stored in a separate so-called drill rod magazine. This drill bar magazine increases the mass of the rock drilling unit 5 and the forces exerted on the drilling unit are maximum when the drill bars are in the magazine. Typically, the rock drilling unit and its components are sized to this maximum load.

BRIEF DESCRIPTION OF THE INVENTION It is an object of the present invention to provide a novel and improved method of stiffening the protective structure of a rock drilling device and a protective structure of a rock drilling device.

The method according to the invention is characterized in that at least part of the drill bars waiting to be used are attached to the protective structure to stiffen the protective structure during operation of the rock drilling device.

The protective structure according to the invention is characterized in that the protective structure comprises means for securing at least a portion of the drill bars waiting to be used to stiffen the protective structure during operation of the rock drilling device.

The idea of the invention is to utilize the storage drill-rods to stiffen the protective structure, since the load on the rock drilling unit and its parts is at its maximum while the drill bars are still unused. In this way, the structure of the rock drilling unit is practically variable-rigid rather than dimensioning the structure and its parts according to maximum load.

In this context, rock drilling equipment is understood to mean not only equipment for rock drilling and quarrying, but also other equipment for performing rock targeting operations, such as bolting machines and drilling machines.

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An advantage of the invention is that the rigidity of the rock drilling unit is highest when the drill bars are stored in the protective structure, i.e. when the mass and load of the drilling unit are at their highest. Thus, the stiffness, mass, and dimensions of the drilling unit and its σ> parts can be reduced, while avoiding the use of a separate drill bar magazine and its mass, thereby avoiding the use of several separate frame or support structures. Further, in some embodiments, the sound-absorbing capacity of the cover or housing structure may be improved and the positive vibration reduced as the mass of the bars 3 increases the mass of the protective structure and increases the rigidity of the protective structure. The solution can also combine mechanisms for changing the drill bar and opening and locking the cover.

BRIEF DESCRIPTION OF THE DRAWINGS 5 Embodiments of the invention will be explained in more detail in the accompanying drawings, in which Figure 1 schematically illustrates a rock drilling device having a protective structure such as a silencer housing, Figure 2 schematically illustrates a protective structure in FIG. Fig. 4 is a schematic cross-sectional view of the third protective structure of Fig. 1, Fig. 5 is a schematic cross-sectional view of a fourth protective structure and Fig. 6 is a schematic cross-sectional view of a fifth protective structure.

In the figures, some embodiments of the invention are shown in simplified form for clarity. Like parts are denoted by like reference numerals in the figures.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 schematically shows a rock drilling device 1 having a base 2. The base is usually provided with wheels or rollers, in this case exemplarily with rollers 3. The base 2 is known per se.

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a boom 4 fixed in a manner known per se in one or more boom sections, illustrated in one example by a single section. Boom 4 may be any boom structure known per se and therefore need not be explained in further detail. Boom 4 is itself

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30, not articulated in a manner known per se, to the substrate 2 so that it can be gj by means known per se, such as pressure medium cylinders or other

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g, turn the substrate to the desired angle.

A cradle 5 is pivotally connected to the other end of the boom 4, which in turn has a longitudinally movable feed 35 beam 6. The feed beam 6 can be moved relative to the crate 5 in a manner known per se by the pressure medium cylinder 6a. The feed beam 6 is fitted with a rock drill, known per se, for drilling holes by means of a drill rod (not shown) and a well-known drill bit connected thereto. The feed beam and said rock drill and at least a portion of the drill rod, typically a major portion outside the drill hole of the drill 5 bar, are surrounded by a protective structure 7 which in the embodiment shown in Figure 1 consists of two different parts but may also consist of one or more.

The rock drilling device 1 and the sound attenuation housing 7 shown in Figure 1 are only one example of a rock drilling device and a protective structure 10 fitted thereto, in this case a sound attenuation case to which the solution can be applied. The rock drilling device to which the protective structure according to the solution is fitted may be very different from the device shown in Figure 1.

Typically, the drill bar fitted to the bore center may consist of either a single drill bar or the length of the bar may be increased by joining several drill bars together, whereby these interconnected drill bars form a single continuous so-called extension bar. This is especially necessary when drilling deep holes. Waiting drill bars are typically stored in a so-called drill bar magazine, whereupon they are attached to an extension bar fitted to the drilling center. Thus, the term 20 drill rods may refer to one single drill rod or an extension rod consisting of several drill rods connected in series. Further, the term drill bar may mean a portion of a drill bar that can be joined in series to form a single drill bar or extension bar. Depending on the embodiment, the drill bar may be a solid bar, a channel may be formed inside it for conveying the rinse medium, or, typically in an extension bar bore, it may also be a hollow tube inside. In Figures 2 and 3, the drill bars waiting to be used are designated 9 and

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drill rods or extension rods adapted for drilling into a hub under reference 9 '.

Fig. 2 shows a part of a rock drilling unit in the direction A-A of section 30 of Fig. 1. The figure shows an embodiment in which | the machine 8 and at least a portion of the drill rods or bars ^ 9 'in the drilling center are surrounded by a protective structure 7, for example a silencer housing or a safety structure related to the safety of the machine en g. This protective structure 7 has an inner surface 15 and an outer surface 16. A portion of the protective structure forms a lid 7a which can be moved by one or more lid actuators 10. In various embodiments, the lid 7a may be the entire length 7 or 5 of the protective structure 7; narrower or wider as long as it is at least long enough and wide to move the drill rods 9 through the lid into and out of the protective structure 7. Furthermore, the cover 7a, on the other hand, must cover the corresponding opening of the protective structure 7 in a manner suitable for the purpose of the protective structure 7, such as sound insulation or machine safety. The cover 7a should also be light enough in structure and easy to open so that the protective structure 7 will not interfere with, for example, maintenance operations.

In the embodiment of Fig. 2, at least some of the drill rods 9, which are not in use, are arranged in connection with the outer surface 16 of the protective housing 7, more particularly the outer surface of the lid 7a of the protective housing 7. Part of the protective housing 7, more particularly the cover 7a of the protective structure 7 and the mechanism 11, serves as a drill bar magazine 14 for locking or securing the waiting drill bars 9 during storage during operation of the rock drilling device 1. By locking or securing the drill rods 9 to the protective structure 7, the mass and stiffness of the retaining drill rods 9 in use 15 can be utilized to stiffen the protective structure 7. Since the mass of the rock drilling unit and its parts, and hence the need for rigidity, is highest when the drill bars are in the drill bar magazine 14, it is particularly advantageous to use the drill bars 9 to stiffen the structure. Correspondingly, the stiffness requirement 20 is at its minimum when the drill bars 9 are connected to an extension bar 9 'fitted to the drilling center for use in drilling. By using drill rods 9 to stiffen the structure, a variable stiffness structure is obtained and it is thus possible to optimally dimension the rock drilling unit and its parts taking into account different operating situations instead of designing according to the maximum load. Further, the lid 7a can be implemented with this solution in a lightweight and easy-to-open manner, which facilitates for example maintenance operations.

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Fig. 2 shows how the lid is provided with a mechanism 11 fitted with at least one mechanism actuator 12 for moving the mechanism 30. The function of the mechanism 11 is to move the next drill bar 9 free in the drill bar magazine 14 into a position from which, for example, a manipulator 18 such as schematically shown in FIG.

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g and move it to the drilling center as an extension of the extension rod 9 '. In this specification, this position from which the manipulator 18 can pick up the drill rod 9, ^ 35 is called a replacement position. Depending on the embodiment, the replacement station may be a specific station into which the drill bar 9 is moved by the mechanism 11 for picking up the manipulator 6 18 as described above. In various embodiments, the replacement position may also be the normal storage and locking or locking position of the drill bar 9 waiting to be used, provided that such position is such that the drill bar 9 can be picked up by the manipulator 18 in this position. The actuator 10 of the lid 7a and the actuator 12 of the mechanism 11 may be, for example, pressure medium cylinders, such as hydraulic or pneumatic cylinders or linear motors.

In the embodiment of Fig. 2, the cover 7a and the mechanism 11 are hinged from the same joint 13 to the protective structure 7. The actuators 10 of the cover 7a and the actuators 12 of the mechanism 11 may be located on the opposite side of the protective structure 7 as shown. Alternatively, the cover 7a and the mechanism 11 may be pivoted separately to the protective structure 7. Further, the cover 7a and the mechanism 11 may be attached to the protective structure 7 without pivoting by the actuators 10 of the lid 7a and the actuators 12 of the lid 7a. on both sides. The cover 7a and the mechanism 11 can then be connected to the protective structure 7 by said actuators.

When drill bars 9 are inserted from drill bar magazine 14 into extension of bar 9 'to drill center, mechanism 11, actuators 10 of lid 7a and actuators 12 of mechanism 11 are used to open lid 7a and move drill bars 9 in drill bar 14 substantially parallel to surface 7. The mechanism 11 then comprises means, such as a chain mechanism, a magazine type mechanism, a spring-return turret mechanism or other linear or rotary mechanism 25, for moving the drill bars 9. The handling and transfer of the drill rods 9 from the drill rod magazine 14 into the extension of the extension rod 9 'to the drilling center 5 can be carried out, for example, as schematically shown in FIG.

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manipulator 18. In Figure 3, the manipulator 18 is disposed in its entirety inside the protective structure 7, but could also be positioned 30 either completely or partially outside the protective structure, for example | a portion of the downwardly facing surface of the protective structure 7, as seen in Figure 3, may be openable to introduce the manipulator 18 into the protective structure, g The manipulator 18 may be implemented in a variety of ways obvious to one skilled in the art.

In various embodiments, the drill bars 9 may be disposed on the outside and / or inner surface of the cover 7a and additionally, or instead of, on the sides of the guard 7 or at least partially around the guard 7. In this case, one or more mechanisms 11 One or more mechanisms 11 may then be disposed inside and / or inside the protective structure 7. In addition, part of the drill rods 9 may, if necessary, also be located outside the protective structure 7.

Fig. 3 illustrates another embodiment of the retaining drill rods 9 in use for stiffening the protective structure 7. Contrary to the arrangement shown in Figure 2, at least part of the drill rods 9 in this embodiment is disposed adjacent the inner surface 15 of the protective structure 7. Thus, the protective structure 7 also acts directly as a drill bar magazine 14. This structure is simpler than the one described above, since the protective structure 7 does not require a lid with opening actuators for transferring the drill bars 9 from storage to the extension bar 9 '. Further, if the transfer of the drill bars 9 from storage to use can be accomplished directly from the storage station 15 by a manipulator 18 known per se, a separate mechanism may not be required to move the drilling bars 9 awaiting use to the manipulator 18. Thus, the storage station also acts as an exchange station. The drill rods 9 can then be locked or secured to the inner surface 15 of the protective structure 7, for example by simple mechanical locking 17 or 20 by a fastening 17, as shown in Fig. 3. The mechanical locking mechanism 17 can be implemented, for example, by forming the locking parts from a resilient material or by using another bracket, e.g. If desired, the locking can also be provided, for example, by a mechanism similar to that shown in Figure 2. The transfer of the drill rod 9 to the exchange-25 position can also be effected, if necessary, by a mechanism 11.

In addition to the embodiments shown in Figures 2 and 3, the protection structure 7 5 may also be stiffened by locking or securing only part of the application

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from the waiting drill bars 9 to the protective structure 7. Further, the shield structure 7 can also be stiffened by placing a portion of the drill rods 9 along the outer surface 16 of the shield structure 7 and a portion of the inner surface 15. In this case, it is generally necessary to provide the guard structure 7 with an opening from which the drill rods tj · 9 can be moved from the outside of the guard structure 7 to the center of the drilling C 1 g and a cover structure such as lid 7a.

Fig. 4 shows yet another third embodiment utilizing retaining drill bars 9 for use in stiffening the protective structure 7. In the embodiment shown in Fig. 4, the drill rods 9 are disposed inside the protective structure 7 but separated by a cover 7a from the space in which the drill machine 6 is located, in the operating situation with the lid 7a closed. The lid 7a can be opened and closed by the actuator 10 of the lid 7a.

5 In some embodiments of the solution, the feed beam 6 may form part or all of a protective structure 7, such as a silencer housing or a safety structure, or depending on the viewpoint, the protective structure 7 will then act as or as a feed beam 6. In this case, guides can be fitted inside the protective structure 7 along which the drill is moved. Further, the drill bar magazine functionality can be fitted to this structure, for example, as shown in Figure 2 or 3. This solution achieves a very simple structure, in which case the feed beam 6, protective structure 7 and drill bar magazine 14 are integrated. One such solution is shown in Fig. 5, schematically and in sectional view, showing a trough or U-shaped portion feed beam 6 which partially surrounds the drill machine 8, i.e. the feed beam 6 forms part of the protective structure 7. The drill machine 8 is a supported feed beam in 6 through slides 20 or slides 20. The feed beam 6 further shows a support surface 21, from which the feed beam 6 can be secured to a rock drilling device. In the embodiment of Fig. 5, a cover 7a supported by a joint 13 on the feed beam 6 is further shown so that the cover 7a can be opened and closed, for example during maintenance operations. The cover 7a forms part of the protective structure 7 and the feed beam 6 and the lid 7a together form the protective structure 25 surrounding the drill machine 8. The inner surface of the cover 7a is further fastened with waiting drill bars 9 so as to stiffen the cover 7a structure 1 during operation. Another one

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such a structure is shown in Fig. 6, in which the protective structure 7 is arranged to surround the drill 8. The drill 8 is supported in the protective structure 7 by means of slides 20 or slide rails 20, i.e. protective | the structure 7 together with the sliding blocks 20 forms a feed beam for the drill 8. Thus, in the embodiment shown in Figure 6, the protective structure 7

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g forms part of the input bar. Further, drilling bars 9 are awaited on the inner surface of the protective structure 7 so as to stiffen the structure of the protective structure 7 during operation of the rock drilling device 1.

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In some cases, the features set forth in this application may be used as such, despite other features. On the other hand, the features disclosed in this application may be combined, if necessary, to form different combinations.

The drawings and the description related thereto are only intended to illustrate the idea of the invention. The details of the invention may vary within the scope of the claims. Figures 1-4 illustrate the use of a protective structure according to the solution in a rock drilling device in which a rock drilling machine is positioned movable on a feed beam. However, the solution can also be used 10 in a so-called submerged drill (DTH, Down The Hole) where the drill is located at the bottom of the drill hole.

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Claims (22)

A method of stiffening a protective structure for a rock drilling rig, which protective structure (7) at least partially surrounds the rock drilling rig (9), drilling machine (8) or feeder device, characterized in that at least part of the drilling rods ( 9) waiting to be used are attached to the guard structure (7) to stiffen the guard structure (7) during rock drilling rig (1) operation. 2. A method according to claim 1, characterized in that at least some of the drill rods (9) waiting to be used are attached to the outer surface (16) of the protective structure (7). 3. A method according to claim 1 or 2, characterized in that the protective structure (7) is provided with a cover (7a) and at least part of the drill rods (9) waiting to be used are attached to the surface of the cover (7a). The method of claim 3, characterized in that the cover (7a) is provided with at least one actuator (10) of the cover (7a), which actuator is used for opening and closing the cover (7a). 5. Method according to any of the preceding claims, characterized in that the protective structure (7) is provided with a mechanism (11), by means of which the drill rods (9) can be fixed to the surface of the protective structure. 6. A method according to claim 5, characterized in that the drill rods (9) are moved with the mechanism (11) and with the actuating means (12) of the mechanism (11) substantially parallel to the surface of the protective structure (7) in a switching position. Method according to any of the preceding claims, characterized in that the drill rod (9) is moved from the switching position to the drilling machine (8) drill center by means of a manipulator (18). 8. A method according to any of the preceding claims, characterized in that at least a part of the drill rods (9) waiting to be used are attached to the inner surface (15) of the protective structure (7). 9. A method according to any of the preceding claims, characterized in that the protective structure (7) is a sound attenuation cover. 10. A method according to any of the preceding claims, characterized in that the protective structure (7) is a safety structure associated with machine safety. 11. Protective structure for a rock drilling rig, which protective structure (7) is designed to at least partially surround the drill rods (9), drilling machine (8) or feeder device, at least partially surrounding the protective structure (7) having means with which at least one (9) waiting to be used can be attached to the protective structure (7) to stiffen the protective structure (7) during the operation of the rock drilling rig (I). Protective structure according to claim 11, characterized in that at least part of the means for attaching the drill rods (9) to the protective structure (7) is arranged to the outer surface (16) of the protective structure (7). Protective structure according to claim 11 or 12, characterized in that the protective structure (7) is provided with a cover (7a) and at least part of the drill rods (9) waiting to be used can be attached to the cover (7a). surface. Protective structure according to claim 13, characterized in that the lid (7a) is provided with at least one actuator (10) of the lid (7a) for opening and closing the lid (7a). Protective structure according to any of claims 11-14, characterized in that the protective structure (7) is provided with a mechanism (II), by means of which the drill bars (9) can be read at the surface of the protective structure. Protective structure according to claim 15, characterized in that the drill rods (9) can be moved with a mechanism (11) and with the actuating means (12) of the mechanism (11) substantially parallel to the surface of the protective structure (7) to a changing position. Protective structure according to any of claims 11-16, characterized in that the drill rods (9) can be moved from the switching position to the drilling machine (8) drill center by means of a manipulator (18). Protective structure according to any of claims 11-17, characterized in that at least part of the drill rods (9) waiting to be used can be attached to the inner surface (15) of the protective structure (7). 19. Protective structure according to any one of claims 11-18, characterized in that the signed structure of the protective structure (7) is a sound attenuation cover. (M A protective structure according to any of claims 11-19, characterized in that the protective structure (7) is a safety structure associated with machine safety. 21. Protective structure according to any of claims 11-20, characterized in that the protective structure (7) is arranged to form part of a feeding beam (6). Protective structure according to any of claims 11-20, characterized in that the feeder beam (6) is arranged to form at least part of the protective structure (7). 10 δ C \ 1 0 CO X cc CL (M 01 LO Oi o o {M