• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a device intended to be included in a rock drilling machine for percussion drilling, the device comprising a shell part () with at least one flat end plane (3). The end face (3) comprises at least a first () and a second region (), the first region (4) comprising at least a part of the outer contour (5) of the end face (3) and consisting of a corrosion-resistant material. (Fig. 1)
    公开号:SE0900899A1
    申请号:SE0900899
    申请日:2009-07-01
    公开日:2011-01-02
    发明作者:Joergen Rodert；Kurt Andersson
    申请人:Atlas Copco Rock Drills Ab；
    IPC主号:
    专利说明:

    10 15 20 25 30 35 In order to protect the partition plan in operation against the intrusion of corrosive water and drill cuttings, there is a known method of laying soft seals in grooves in the end plan. This method, in certain aggressive environments, causes the material outside the grooves to corrode, which in turn leads to the sealing grooves and seals being destroyed, causing leakage.
    Furthermore, it is previously known that in hydraulic drilling machines, which are used underground, lubricants in the form of oil-mixed compressed air are connected to the end surfaces, which are included in the joints. In addition to lubrication, the idea is that if a small gap occurs somewhere between the end surfaces, the oil-mixed air that then flows out must prevent the penetration of water and drill cuttings. If, after all, corrosion starts at the edge of the end surfaces, which can occur, for example, when the drill is not in use, a passage is formed where then the main part of the oil-mixed compressed air can pass. This means that other parts of the end plan are not protected. Without lubrication, there is a risk of overheating and burning, as micro-movements always occur between the end faces of a drilling machine during operation.
    There is thus a need for an improved device and method for protecting the end plan / division plan, which is part of the joints in a striking rock drilling machine and thereby reducing the operating costs of rock drilling. The now known solutions do not meet these needs.
    SUMMARY OF THE INVENTION It is an object of the present invention to provide a device / method for making rock drilling more cost effective for the user and then especially in gmv environments islands with acid, salt and corrosive water.
    According to a first aspect, the invention relates to a device intended to be included in a rock drilling machine for striking drilling. The device comprises a shell part with at least one end plane, which consists of a first and a second area, where the first area comprises at least a part of the outer contour of the end plane and consists of a corrosion-inert material.
    The term corrosion-resistant material refers to a material which is rust-resistant / rust-prone.
    In the first place, it is a part of an edge portion of an end face comprising a part of the outer contour, which is arranged in a corrosion-resistant material. The outer edge of the end face seals outwards and thus the precondition for corrosion attack in the outer contour of the joints is eliminated and the risk of corrosion attack is minimized. The invention thus has the advantage of improving the resistance to corrosion attack in the division plan and protects there against crevice corrosion in the first place. 10 15 20 25 30 35 Parts of the end faces which are part of a joint and which risk being exposed to corrosive water even when the drilling machine is not in operation are arranged in a corrosion-resistant material. The corrosion-resistant material should have a very high density in order to be able to shut off the water. The material should also have a hardness that corresponds to the hardness of the base material in order to achieve high demands on durability. The corrosion-resistant material can, for example, consist of stainless steel, alloy containing cobalt and chromium (eg brand Stellite) or a suitable ceramic material.
    The purpose of the invention is to prevent superficial corrosion attacks in the joint division plane. In a rock drilling machine, arranged with a number of shell parts according to the invention and pressurized with an oil-mixed pressure lift, the oil-mixed compressed air will for the most part remain within the shell of the machine and protect the dividing plane, as intended.
    The result is a considerably increased service life of the shell parts, which are very expensive for the user, whereby the operating costs per drilled meter hole are comparatively much lower.
    Furthermore, the invention results in a reduced frequency of all kinds of drilling machine problems caused by corrosive dividing planes and consequently biases in the drilling machine, which further reduces the production costs of rock drilling.
    The invention works in rock drilling machines comprising partly pressurized dividing planes and partly dividing planes provided with a seal, eg O-ring. In the case of pressurized dividing planes, the compressed air must be able to escape. The end plane is provided with radially oriented grooves which distribute the oil-mixed air over a large part of the end plane. Sometimes there are leakage grooves arranged in the end plane starting from the inside of the drilling machine partly to increase the distribution of lubricating air over a dividing plane and partly to control the air mixture further for how it should lubricate, for example a bolt dryer belt.
    An alternative is that the first area comprises the entire outer contour of the end plane. Thus, the first area comprises the entire edge area of an end face.
    An alternative is that the first area is included in a layer with a certain extent along a shell part and thus a longitudinal axis of the drilling machine, since the shell parts are arranged coaxially in the rock drilling machine.
    Alternative fastening methods for fastening the corrosion-resistant material to a shell part are, for example, welding, injection or electrolytic coating. An alternative is that the second area also consists of a corrosion-resistant material. Thus, the entire end face is made of a corrosion-resistant material.
    An embodiment of the invention consists of a joint in a striking rock drilling machine comprising at least two shell parts. The shell parts are designed according to one of the above alternatives and are arranged so that the areas of corrosion-inert material are in sealing contact. It is part of the idea that the areas consisting of corrosion-resistant material have the same shape so that they cover each other in the dividing plane.
    An embodiment of the invention consists of a striking rock drilling machine comprising at least one joint arranged as above. The joint is radially positioned so that the first areas of corrosion-inert material are arranged on the rock drilling machine where the risk of corrosion is greatest.
    The location of these areas takes into account, among other things, the type of rock drilling machine and the type of joint, as well as the type and location of the bolts within a bolt joint. The risk of corrosion is also taken into account in situations when the rock drill is not in operation.
    Thus, no corrosion occurs inside the protective edge areas of corrosion-resistant material.
    The shell parts have a service life, which is comparatively increased considerably, probably multiplied in places with very acidic, salty and corrosive water.
    It is part of the inventive idea that the device is included in rock drilling machines for drilling underground in mines with acid and / or salt water.
    During operation of the rock drill, the rock drill is pressurized so that oil-mixed air is supplied to the interior of the drill under pressure, as described above. The purpose is to lubricate and protect the corrosion surfaces / partition plan between the shell parts and the details included in the shell parts during operation.
    When the end face has surface defects / is not really flat, there is a risk that the pressurized oil-mixed air can pass out of the drilling machine uncontrollably instead of circulating around the inside of the machine and lubricating the components, in accordance with the above description. In addition, there is a risk that acidic, salty and / or corrosive water will penetrate between the end faces and cause corrosion. Corrosion on the end face in turn leads to additional passages, through which the oil-mixed air can flow out uncontrollably. According to a second aspect, the invention relates to a method intended to protect against corrosion a rock drilling machine for striking drilling comprising a number of joints with a number of shell parts each comprising at least one end plane, which consists of at least a first and a second area . The first area comprises at least a part of the outer contour of the end plane and consists of a corrosion-resistant material. The method comprises mounting a rock drilling machine by connecting a number of shell parts to pairs of uniform first areas so that the first areas in a number of joints sealingly cover each other.
    The method further comprises during operation pressurizing the joints in the rock drilling machine with oil-mixed air, the first areas in each joint sealing and preventing the oil-mixed air from passing out and at the same time sealing and preventing aggressive water in the surroundings from penetrating the constituent air planes, the oil-mixed air lubricate the other areas included in each subdivision plan.
    The method according to the invention has the advantage that the oil-mixed air lubricates the contact surfaces between the internal parts of the drilling machine at the same time as the tight end planes prevent the oil-mixed air from passing out via the dividing plane in an uncontrolled manner.
    If the outer part of the dividing plane never corrodes, the oil-mixed compressed air will for the most part stay within the shell of a drilling machine and protect the plan as intended.
    In an alternative method according to the invention, the oil-mixed air is caused to pass out via the other areas in a controlled and controlled manner.
    BRIEF DESCRIPTION OF THE DRAWING The invention will be explained in more detail by describing various embodiments thereof starting from the accompanying drawing, in which Figure 1 is a striking rock drilling machine comprising at least one device according to the invention, Figure 2 is a cross section of the rock drilling machine in Figure 2. Figure 3 is a device according to the invention, Figure 4 is an alternative device according to the present invention, Figure 5 is a cross-section through a detail of the device according to the present invention.
    DESCRIPTION OF ALTERNATIVE EMBODIMENTS A striking rock drilling machine 1 (Figure 1) consists of a number of larger details, so-called shell parts 1a-g, which are held together by joints 11, eg bolted joints. Typical shell parts are front part, gearbox, intermediate part, cylinder and back piece. Each of the shell parts contains a larger number of details which are necessary for the operation of the machine, eg percussion piston, piston controls, valve slide, damping piston, the function of which is not affected by the present invention. Figure 2 is a cross-section through a rock drilling machine according to Figure 1 and shows that each pair of shell parts meet in contact in a dividing plane 7 during assembly. Figure 2 shows that a first lf and a second shell part lg are connected in a joint 11 with a number of bolts 9.
    Two adjacent end planes 3 (Figure 3) form a dividing plane 7 in the drilling machine. Each dividing plane 7 is thus created by two opposite end planes 3 when the affected shell parts are connected to a joint 11. The end plane 3 of a shell part can be said to constitute a mounting surface towards the next shell part in a drilling machine.
    Figure 3 is a shell part 1c comprising an end plane 3 with a first area 4 consisting of a corrosion-inert material. The first area 4 comprises a part 5a of the outer contour 5 of the end plane and thus comprises a part of the outer edge of the end plane 3. When the shell part 1c is mounted and included in a rock drilling machine 1, the first area 4 will be located in an area of the drilling machine where the risk of corrosion is great, in accordance with the description above. The end plane 3 also comprises a second area 8, which consists of the basic material of the shell part 1c, for example hardened steel.
    In an alternative embodiment, the first area 4 comprises the entire outer contour 5 of the end face 3 and thus comprises the entire edge area 12 of the end face 3 (Figure 4).
    Figure 5 is a cross-section through the outer edge 12 of the end plane 3 in Figure 4. Figure 5 shows that the first area 4 is included in a layer 10 with a certain extent h along the longitudinal axis A.
    In connection with the machining of a shell part, eg shell part lc in Figure 3, a groove is milled around at least a part of the outer contour 3 of the end plane 5. The groove is made a couple of mm deep and about 10 mm wide.
    The groove is then filled by welding with corrosion-resistant material. The shell part was then hardened and finished. The end result is a shell part with an end plane comprising an edge area, which at least to some extent consists of corrosion-resistant material.
    A rock drilling machine comprising shell parts according to the invention has a number of dividing planes 7, each formed by two end planes 3. Rock drilling machines thus have an outer casing which is held together by a number of joints 11, usually bolt joints, which are comparatively very tight. When the rock drilling machine is put into operation, it is pressurized with oil-mixed air, whereby the dressings according to the invention prevent water from the environment from penetrating via the division plane 7 and also prevent the oil-mixed air from passing out via the division plane 7. The invention has the advantage that the joints 11 can withstand salt. acidic and corrosive water significantly better without being attacked by corrosion.
    It should be pointed out that the spirit plane of a recoverable drilling machine can be provided with intentional grooves so that the oil-mixed air can flow out into the division plane 7 in a controlled manner and lubricate them. The oil-mixed air can also be caused to continue to flow and lubricate, for example the bolts included in a joint.
    权利要求:
    Claims (8)
    [1]
    Device intended to be part of a rock drilling machine (1) for striking drilling, wherein the device comprises a shell part (1 ag) with at least one end plane (3), characterized in that the end plane (3) consists of at least a first (4) and a second region (8), wherein the first region (4) comprises at least a part (Sa) of the outer contour (5) of the end plane (3) and consists of a corrosion-resistant material.
    [2]
    A device according to claim 1, wherein the first area (4) comprises the entire outer contour (5) of the end plane (3) -
    [3]
    A device according to claim 1, wherein the first region (4) is included in a layer (10) with a spread (h) along the axis of symmetry (A) of the shell part.
    [4]
    A device according to any one of the preceding claims, wherein the second area (8) consists of a corrosion-resistant material.
    [5]
    A joint (11) in a striking rock drilling machine comprising two shell parts (1c, 1d) according to any one of claims 1-3, wherein the shell parts (1c, 1d) where the respective first areas (4c, 4d) consisting of corrosion-inert material are uniform and are arranged in sealing contact in a dividing plane (7).
    [6]
    A rock drilling machine (1) arranged for striking drilling comprising at least one joint (11) according to claim 5, wherein the joint (11) is radially positioned so that the respective first areas (4c, 4d) of corrosion-inert material cover each other and are arranged in an area on the drill where the risk of corrosion is greatest.
    [7]
    A method of corrosion protection of a rock drilling machine (1) for striking drilling comprising a number of joints (1 1) with a number of shell parts (1 ag) each comprising at least one end plane (3), the end plane (3) consisting of at least one first (4) and a second region (8), wherein the first region (4) comprises at least a part (Sa) of the outer contour (5) of the end plane (3) and consists of a corrosion-resistant material, the method comprising mounting a rock drilling machine by to connect a number of shell parts (1a-1 g) to paired first regions (4) so that the first regions (4) sealingly cover each other in a number of joints (1 1), during operation pressurizing the joints (11) in the rock drilling machine (1 ) with oil-mixed air, the first areas (4) in each joint sealing and preventing the oil-mixed air from passing out and at the same time sealing and preventing aggressive water in the surroundings from penetrating into the constituent dividing planes (7), the oil-mixed air lubricating them in each division plan (7 covering other areas (8).
    [8]
    A method according to claim 7, wherein the oil-mixed air is caused to pass out via the other areas (8) in a controlled manner.
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    同族专利:
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    AU2010266747A1|2012-02-09|
    CN102470526A|2012-05-23|
    US20120152620A1|2012-06-21|
    SE534450C2|2011-08-30|
    EP2448721A1|2012-05-09|
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    WO2011002399A1|2011-01-06|
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    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE0900899A|SE534450C2|2009-07-01|2009-07-01|Device and method for protecting a rock drill against corrosion attack|SE0900899A| SE534450C2|2009-07-01|2009-07-01|Device and method for protecting a rock drill against corrosion attack|
    EP10794454.8A| EP2448721A4|2009-07-01|2010-06-18|Device and method for protecting the rock drilling machine from corrosion|
    PCT/SE2010/050699| WO2011002399A1|2009-07-01|2010-06-18|Device and method for protecting the rock drilling machine from corrosion|
    CN201080029112.XA| CN102470526B|2009-07-01|2010-06-18|The protection uncorroded equipment of rock drill and method|
    JP2012519503A| JP5683582B2|2009-07-01|2010-06-18|Apparatus and method for protecting a rock drill from corrosion|
    AU2010266747A| AU2010266747B2|2009-07-01|2010-06-18|Device and method for protecting the rock drilling machine from corrosion|
    US13/382,099| US9352461B2|2009-07-01|2010-06-18|Device and method for protecting the rock drilling machine from corrosion|
    CA2767085A| CA2767085C|2009-07-01|2010-06-18|Device and method for protecting the rock drilling machine from corrosion|
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