KR20130137598A - Holding apparatus for a drill rod of a taphole drilling machine and method for removing a drill rod - Google Patents

Abstract

The present invention relates to a drill rod (5) holding device (27) of a taphole drilling machine (10) and a method for removing the drill rod mounting (17) from a taphole drilling machine, wherein the taphole drilling machine is movablely arranged drilling. And a frame 14 with an overtrigger mechanism 16, the drilling and percussion mechanism having a drill rod mounting for connecting the drill rod, the holding device 21 of the holding device is arranged in the frame, and the holding device Is adapted to hold the drill rod against the drill rod mounting, the drill rod being firmly fixed to the frame by the gripping device.

Description

Holding apparatus for a drill rod of a taphole drilling machine and method for removing a drill rod}

The present invention relates to a method for removing a drill rod from a drill rod mounted on a taphole drilling machine having the features of claim 15 as well as a drill rod holding device of the taphole drilling machine having the features of claim 1.

Taphole drilling machines are well known in the art and are practically used to open the melt canal by drilling holes in the furnace walls of the blast furnace. Known taphole drilling machines are substantially provided with a frame having a drill and trigger mechanism. The drill and triggering mechanism has a drill rod mounting for connecting with a drill rod of several meters in length. The frame is formed in a carriage manner and, for example, is rotatably or rotatably mounted to move to a position where perforation is required in front of the tap hole of the furnace. In order to drill the hole, the frame is firmly fixed to the front end of the furnace by the fixing device. Thus, a relatively large supply force is employed through the drill rod during the drilling process. During the drilling process, the drill and the triggering mechanism cause a continuous triggered impact in a hammer drill manner with the rotation of the drill rod. Since the supply of the drill rod is generated by the feeding movement of the drill and the triggering mechanism in the longitudinal direction of the frame, the drill rod can enter deeper and more continuously into the walls of the furnace. Since the drill rod can be several meters long, it is necessary to loosen the drill rod at the front end of the frame. For this purpose, a variety of devices are known in the art in which the drill rod can be easily replaced and in all situations the drill rod is formed in such a way that the drill rod is rotated and supplied with guaranteed external interference.

Since the drill and percussion mechanism add relatively large forces to the drill rod through drill rod mounting during the drilling process, plastic deformation of the rear end of the drill rod of the drill rod mounting can occur regularly during the drill process. In particular, this plastic deformation can be caused by a triggering mechanism that adds a triggering impact to the rear end of the drill rod via drill rod mounting. This can lead to replacement of drill rods which are normally required after drilling the tapped holes and can make work more difficult. Due to the plastic deformation of the rear end of the drill rod in the drill rod mounting, the drill rod jams inside the drill rod mounting and cannot be easily removed from the drill rod mounting. Thus, in this case it is possible only by additional tools and requires more time in the replacement or removal of the drill rod from the drill rod mounting by the operator.

It is an object of the present invention to provide a drill rod holding device of a taphole drilling machine and a method for removing a drill rod from a drill rod mounting of a taphole drilling machine that can easily remove the drill rod from the drill rod mounting.

This object is solved by a drill rod holding device of a taphole drilling machine with the features of claim 1 and a drill rod removal method with the features of claim 15.

The present invention relates to a drill rod holding device of a tamhole drilling machine, wherein the taphole drilling machine includes a frame having a drill and a triggering mechanism arranged to be movable, the holding device of the holding device is disposed in the frame, and the holding device is a drill. Contributing to maintaining the drill rod relative to the rod mounting, the drill rod can be rigidly fixed to the frame by the gripping device.

Thus, the wavelength device can be used to fix the drill rod in a torsion-resistant manner with respect to the frame or in a manner in which the feed movement of the drill rod is no longer possible. As a result, the drill rod can be removed from the drill rod mounting since the movement of the drill and percussion mechanism over the frame in the opposite direction of the feed movement is possible or it can be replaced in a machine driven manner. In the case where the drill rod may jam inside the drill rod mounting, no additional tool or operator is necessary since a tool for holding or clamping the drill rod is provided or formed by the gripping apparatus. Unlike the manual removal of the drill rod from the drill rod mounting, in particular, a high pulling force can be provided or generated by the movable drill and the triggering mechanism, which removes the drill rod from the drill mounting even if the drill rod is deformed a great deal. To facilitate the saving of time for replacement of the drill rod.

With regard to the fixing of the drill rod to the frame, the position of the frame to which the drill rod is fixed is not of fundamental importance. It is also conceivable to fasten the drill rod, for example directly adjacent to the drill rod mounting on the frame.

It is particularly useful if the gripping device is placed at the end of the frame facing the taphole and opposite the drill and trigger mechanism. The gripping apparatus can then be implemented in a way that can contribute to the guidance of the drill rod. In this way, non-circular or unusual rotation of the drill rod can be prevented when drilling into the furnace wall.

The gripping device has, for example, a clamping element capable of securing the drill rod in a force-fitting and / or form-fitting manner. The clamping element can be formed to be able to clamp the drill rod by friction fixing. For this purpose, the surface of the clamping element intended to be adjacent to the drill rod may be provided with toothing, for example. The clamping element may also have pin-shaped or wedge-shaped protrusions that can penetrate the surface of the drill rod in a form-fitting fashion.

Furthermore, the gripping apparatus has claws capable of gripping around the drill rod, and the manner in which the drill rod is guided by the forceps is preferred. Therefore, the tongs can function as a guide for the drill rod, so that the fixing of the drill rod generated by the tongs is unnecessary. The tongs can also be formed so that the drill rod can be rotated in such a way that it can be released from the tongs and easily replaced without the need to surround the drill rods.

It is preferred that the clamping elements are arranged on each tong and securely fixed thereto. Depending on the position of the tongs with respect to the drill rod, the clamping elements can be fixedly adjacent to it and thus secure the drill rod or they can be spaced from the drill rod so that the drill rod can be guided between the tongs. The function of the clamping element can be easily adjusted via the spacing of the forceps with respect to the drill rod.

The holding device may also be provided with a drive unit capable of rotating the holding device to an open position, a closed position, or a clamping position. In the open position, for example, the tongs are spaced apart from each other by an interval at which the drill rod can simply be removed without guiding the drill rod between the tongs. In the closed position, the tongs are wrapped around the drill rod so that the drill rod is guided between the tongs. In the clamping position, the tongs are placed very close to the drill rod so that the drill rod is fixed between the tongs or between the clamping elements attached to the tongs. The drive unit is capable of easy mechanization, which allows automatic movement of the gripping apparatus to the positions described above if necessary.

The drive unit can be formed by a lever gear, a drive shaft and an actuating cylinder, the actuating cylinder is connected to the drive shaft in such a way that the drive shaft can be rotated by the actuating cylinder, and the drive shaft is connected to the drive shaft. It is connected to the lever gear in such a way that it can cause the holding device to rotate. The actuating cylinder may be a hydraulic cylinder capable of rotating or rotating the drive shaft at a particular angle of rotation. This rotation of the drive shaft is transmitted to the lever gear, which validates the operation of the gripping device. In this way, the open, closed, or clamping positions can be adjusted by other rotation angle positions of the drive shaft. In addition, the use of a drive shaft allows spatial separation of the gripping device and the working cylinder, since the working cylinder must be protected from temperature influences and as far as possible from the walls of the furnace.

For adjusting the gripping device to the diameters of the different drill rods or for switching between the closing or clamping positions of the gripping device, the retaining device is provided with an adjusting device whereby the closing or clamping position can be adjusted.

For example, a stop may be formed between the drive unit and the regulating device to limit the rotation of the drive shaft. The drive shaft can then be rotated by a certain rotational angle by the actuating cylinder at the point of closing or clamping position of the gripping device to be reached. The detent may, for example, be provided with a screw that allows for precise adjustment of the detent.

Rotation of the drive shaft can be made simply when the working cylinder is connected to the drive shaft by a crank lever. The crankshaft may for example be securely fixed to one end of the drive shaft and the actuating cylinder may be coupled to one end of the crank lever to pivot the crank lever relative to the drive shaft.

In this case, the detent can be formed particularly simply between the crank lever and the adjustment device. The detent can then simply limit the rotational movement of the crank lever and thus the rotational angle of the drive shaft.

In order to be able to change or adjust the detent as easily as possible, the adjusting device may have a detent element for forming the detent, the detent element having a closing detent and clamping position for implementing the closed position. A clamp detent may be provided for implementation, the detent element being movable between the closed or clamping position in such a way that the closing detent or optionally the clamp detent forms a detent. Thus, the detent elements can form two detents, whereby the detent fitting of the detent element is used in accordance with the required position of the gripping device. The detent element may, for example, form a closing detent and a clamp detent, and may be formed as a rod that can slide along its longitudinal axis in such a way that the closing detent or clamp detent is used as a detent. The pawls thus formed can limit or adjust the angle of rotation of the drive shaft and allow the choice between closing or clamping positions of the gripping device by simple sliding of the pawl elements. In addition, the closure or clamp detent may be formed by the physical configuration of either of these detents in the adjustment device. Each detent can then be formed by the maximum stroke of the working cylinder.

In another embodiment, the adjustment device has a spring through which the detent element can move to the closed position. Thus, unless a particular position is selected by the adjusting device, the closing detent and the gripping device forming the detent always form the closing position. The spring may be embodied as a tension or compression spring causing sliding or respective movement of the adjustment device.

For example, the adjustment device may have a locking device in which the detent element can be fixed in the closed or clamping position. By means of the locking device, the detent element can be made to be kept secure in its intended position. For example, the locking device can be formed from the lever element locked or pivoted to the respective required position of the detent element so that the locking device can secure the detent element in a form-fitting manner to prevent its unnecessary sliding. .

In the method of the present invention for removing a drill rod from a drill rod mounting of a taphole drilling machine, the taphole drilling machine has a frame provided with a drill and a triggering mechanism, and the drill and triggering mechanism is a drill rod mounting for connecting the drill rod. Wherein the gripping device is disposed in the frame, the gripping device holds the drill rod against the drill rod mounting, the drill rod is securely fixed to the frame by the gripping device, and the drill rod drill rod is removed from the drill rod mounting. In this way the mounting is movable relative to the gripping device.

With regard to the advantages of the method according to the invention, the detailed description relating to the device according to the invention is used. Other advantageous embodiments refer to the device of claim 1 and to the features of their dependent claims.

According to the present invention, there is an effect that additional tools are unnecessary and work time is shortened when replacing or removing the drill rod from the drill rod mounting.

The invention will be explained in more detail with reference to the accompanying drawings.
1 is a side view of a drill rod holding device of a taphole drilling device.
2a to 2c respectively show different positions of the gripping apparatus according to the invention.
3A to 3C are enlarged views of respective holding devices of FIGS. 2A to 2C.
4 is a cross-sectional view of the taphole drilling machine of FIG. 1 with an adjusting device.
5 is a partial cross-sectional view of the taphole drilling machine of FIG. 1 with an adjusting device.
6 is a longitudinal cross-sectional view of the adjusting device of FIG. 5.
FIG. 7 is another longitudinal sectional view of the adjustment device of FIG. 5.
FIG. 8 is an enlarged view of the adjusting device of FIG. 5.
9 is a side view of an adjusting device according to another embodiment of the present invention.

Referring to FIG. 1, the taphole drilling machine 10 is located in a partially illustrated blast furnace wall 11. The taphole drilling machine 10 moves a frame 14 on which a foot 12, a drill rod 15, and a drill and a percussion mechanism 16 are disposed and moves its position. A positioning device 13 for determining. The drill rod 15 is inserted into the drill rod mounting 17 of the drill and percussion mechanism 16, along the frame 14 in the direction of the furnace wall 11 and in the longitudinal direction of the drill and percussion mechanism 16. By sliding forward and backward. In addition, a fastening device 19 is arranged at the front end 18 of the frame 14 to firmly fix the frame 14 to a holder 20 in the furnace wall 11. do. Thus, precise taphole drilling can be performed. In addition, a gripping device 21 with a lever gear 22 is arranged at the front end 18, and the lever gear 22 is covered by the protective cover 24 through the drive shaft 23 and is invisible operation. It is connected to a cylinder (not shown). The adjusting device 25 is also arranged at the rear end 26 of the drive shaft 23. Together with the gripping device 21, the lever gear 22, the drive shaft 23, the working cylinder, and the adjusting device 25 form a holding device 27 for the drill rod 15. If the drill rod 15 cannot be easily removed from the drill mounting 17, in particular, if it jams in the drill mounting 17 due to plastic deformation, the drill rod 15 may be drill rod 15. The clamping device 21 is clamped by the gripping device 21 at the front end 28 of the head). The drill and triggering mechanism 16 are then driven or sliding backward in the direction of the rear end 29 of the frame 14 so that the drill rod 15 is pulled out of the drill rod mounting 17 by this relative movement. Thus, the movement of the drill and the triggering mechanism 16 by the machine in the direction of the rear end 29 of the frame 14 necessary for pulling the drill rod 15 out of the drill hole (not shown) of the furnace wall 11 is carried out. It can be used to separate the drill rod 15 from the rod mounting 17. For this, additional tools are unnecessary and there is no interference with regular work processes.

2A-2C and 3A-3C specifically show examples of the holding device of the holding device according to the preferred exemplary embodiment of the present invention.

2A-2C and 3A-3C, the gripping apparatus 21 is substantially formed as claws 30 and clamping elements 31. The tongs 30 are rotatably arranged around the axis 33 with respect to the axis of symmetry 32 of the gripping device 21. The lever gear 23 not shown in the drawings of this embodiment is connected to the tongs 30 by a joint 34. In the positions of the gripping apparatus 21 respectively shown here, the drill rod 15 does not fall out because it is received between the tongs 30. For complete replacement of the drill rod 15, the tongs 30 can each be pivoted about the shaft 33 in such a way that the drill rod 15 is released. 2A and 3A show the clamping position of the gripping apparatus 21, FIGS. 2B and 3B show the intermediate position of the gripping apparatus 21, and FIGS. 2C and 3C show the closing device of the gripping apparatus 21. Shows. Thus, the forceps spacing a is increased or decreased. As shown in FIG. 3A, the wedge-shaped clamp jaws 35 of the clamping element 31 penetrate the surface 36 of the drill rod 15, thereby drilling the drill rod by the gripping device 21. A force-fit and shape-fit fixation of (15) is obtained. According to the description of FIG. 3C, the tongs 30 may move slightly apart so that a gap 37 is formed between the clamp jaw 35 and the drill rod 15 by increasing the clamp spacing a. The drill rod 15 can then be rotated in the gripping apparatus 21 and slip in the axial direction for the drilling process. The gripping apparatus 21 has a guiding function at this position. If all of the clamping elements 31 wear out, the clamping elements can be easily displaced from the tongs 30 by a screw 38 and replaced.

The complementary views of FIGS. 4 to 8 illustrate the adjusting device 25 in more detail. The actuating cylinder 39 located under the protective cover 24 is connected to the crank lever 41 which is in turn fixedly connected to the drive shaft 23 via the joint 40. Thus, as shown in FIG. 4, the movement of the actuating cylinder 39 allows the rotation of the drive shaft 23 to be at approximately the rotational angle α. In addition, the adjusting screw 42 disposed on the crank lever 41 forms a detent, respectively a closing detent 47 together with the detent element 43 of the adjusting device 25. The detent element 43 is formed as a rod 45 having a quadrilateral cross section and is mounted to be movable in the longitudinal direction in a correspondingly formed guide profile 46.

On the rod 45 opposite the adjusting screw 42, a closing detent 47 is formed for the abutment of the adjusting screw 42, or a clamp detent is not seen in this figure. 6 and 7, the spring 49 is attached to the front end 50 of the rod 45 such that the rod 45 is pulled to the closed position of the detent element 43. Also, at the rear end 51 of the rod 45, the lever 52 is disposed on or rotatably connected to the axis of the rod 45. Thus, the shaft 53 is inserted into the central bore hole 54 of the rod 45 and fixed with an eyebolt 55. Here, the eye bolt 55 is responsible for the function of fixing the spring (49). As shown by the dashed lines in FIGS. 6 and 7, through the movement of the lever into the clamp position of the detent element 43, the rod 45 is in the direction of the rear end 51 in such a way that the clamp detent is formed. It slides inside the guiding profile 46 against the spring force of the spring of the spring 49. The adjusting device 45 further includes a control panel 56, and using the control panel 56, the operator can take the respective position of the lever 52 and the closing or clamping position of the gripping device. Further, the lever 52 can be rotated about the longitudinal axis 57 of the rod 45 in such a way that the lever 52 can fix the rod 45 at each position.

9 shows another embodiment of the adjusting device 58 compared to the adjusting device described above. This adjusting device has a lever 59 with a control panel 60. Two grooves are formed in the control panel 60, and the lever 59 can be inserted into the grooves by rotation about the longitudinal axis 57, so that each position of the rod 45 is controlled by the lever ( 59) and by control panel 60.

10 ... taphole drilling machine 11 ... furnace wall
11 ... foot 13 ... positioning device
14 ... frame 15 ... drill rod
16 ... drill and trigger mechanism 17 ... drill mounting
19 ... fastening device 21 ... gripping device
22 ... Lever gear 23 ... Drive shaft
24 ... cover 25 ... adjusting device
27 ... holding device 30 ... claws
31 ... clamping element 33 ... axis
35.Clamp jaws 37.Slit
38.Screw 29 ... Working cylinder
40 ... joint 41 ... crank lever
42 ... adjusting screw 43 ... detent element
45 ... Load 46 ... Guide profile
47 ... closing detent 49 ... spring
56.Control panel

Claims (15)

In the holding device 27 of the drill rod 15 of the taphole drilling machine 10,
The taphole drilling machine has a frame (11) on which a drilling and triggering mechanism (16) is movable;
The drilling and triggering mechanism has a drill rod mounting (17) for connecting the drill rod;
The holding device (27) further comprises a holding device (21) arranged in the frame and provided to hold the drill rod with respect to the drill rod mounting;
The drill rod holding device of the taphole drilling machine, characterized in that the drill rod can be firmly fixed to the frame by the gripping device.
The method according to claim 1,
The gripping device 21 is arranged at the end 18 of the frame positioned to face the tap hole, the end being located opposite the drilling and triggering mechanism 16. Load retaining device.
The method according to claim 1 or 2,
The gripping device 21 is provided with a drill rod holding device of a taphole drilling machine, characterized in that it has clamping elements 31 which can fix the drill rod 15 in a force-fitting and / or shape-fitting manner. .
The method according to claim 3,
The gripping device 21 has claws 30 which can grip around the drill rod 15, the drill rod being guided by the tongs. Drill rod holding device.
The method of claim 4,
The clamping elements (31) of the drill rod retaining device of the taphole drilling machine, characterized in that each of the tongs (30) are arranged and firmly connected.
The method according to any one of claims 1 to 5,
The holding device (27) is a drill rod holding device for a taphole drilling machine, characterized in that it comprises a drive unit that can cause the holding device (21) to rotate to an open position, a closed position, or a clamping position.
The method of claim 6,
The drive unit is formed by a lever gear 22, a drive shaft 23 and an actuating cylinder 39;
The working cylinder is connected to the drive shaft in such a way that the drive shaft can be rotated by the working cylinder;
And the drive shaft is connected to the lever gear in such a way that the lever gear can cause rotation of the gripping device (21) through the drive shaft.
The method according to claim 6 or 7,
The retaining device (27) further comprises an adjusting device (25) (58) that can adjust the closing or clamping position of the gripping device (21).
The method according to claim 8,
And a detent (47) formed between the drive unit and the adjustment device (25) (58) to limit rotation of the drive shaft (23).
The method according to claim 8 or 9,
Drill rod retaining device of a taphole drilling machine, characterized in that the working cylinder (39) is connected to the drive shaft (23) by a crank lever (41).
The method of claim 10,
The detent (47) is a drill rod holding device of the taphole drilling machine, characterized in that formed between the crank lever (41) and the adjusting device (25) (58).
The method according to any one of claims 9 to 11,
The adjusting device (25) (58) has a detent element (43) for forming a detent;
The detent element has a closing detent 47 for forming a closed position and a clamp detent for forming a clamping position;
And said detent element is movable between said closed position and said clamping position in such a way that said detent detent or, optionally, said clamp detent forms said detent.
The method of claim 12,
The adjustment device (25) (58) is characterized in that it has a spring (49) for moving the detent element (43) to the closed position.
The method according to claim 12 or 13,
The adjustment device 25, 58 further comprises a locking device for locking the detent element 43 in the closed position or the clamping position. .
The drilling and triggering mechanism 16 having a frame 14, a drill rod mounting for connecting the drill rod, and a taphole drilling machine 10 having a gripping device for holding the drill rod against the drill rod mounting. In a method for removing a drill rod 15 from a drill rod mounting 17,
Firmly fixing the drill rod to the frame using the gripping apparatus; And
Moving the drill rod mounting relative to the gripping apparatus such that the drill rod can be removed from the drill rod mounting.

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