LU86869A1 - STITCH HOLE DRILL FOR TWO DIRECTIONS - Google Patents

Description

«BL-3956

STITCH HOLE DRILL FOR TWO DIRECTIONS

The invention relates to a tap hole machine for two directions, in particular for use in shaft furnaces.

According to an almost exclusively used method, the tapping process in a shaft furnace, such as a blast furnace, consists in pulling out a tapping rod left in the stuffing after the previous tapping by means of a return mechanism and the tapping hole with the help of a stopper To close the stuffing cannon with stuffing compound; A new tapping rod is then inserted into this still largely soft stuffing compound by means of a proposal and left in it until the next tapping.

For this handling of the tapping rod, a "drilling machine" is consequently required, which can strike both forwards, for inserting the rod into the still soft stuffing mass, and backwards, for pulling out the rod in order to initiate the tapping, i.e. a drilling machine, which is equipped with a proposal as well as a recoil mechanism and, according to the prior art, has a pneumatic motor for each of these two directions of impact.

Because of the necessary presence of two pneumatic motors, the drilling machine, and thus also the carriage along which such a drilling machine is guided, has a relatively large overall length. These systems according to the prior art therefore not only have a relatively large outlay on pneumatic components in comparison to the overall design outlay, they also build more space-consuming because of their greater axial length

In addition, in the case of systems according to the prior art, which are still equipped with a drilling machine with a sole proposal, a conversion to two directions of impact cannot be carried out in a simple manner.

4 2 4

With such a conversion, as can be seen from the above explanations, not only must a second pneumatic motor be installed, among other things, but also the above-mentioned carriage must be extended, which may not be possible due to space constraints.

To avoid these disadvantages of the prior art, it is therefore an object of the invention to propose a tap hole drilling machine for two directions of impact, which is more compact than before, requires less pneumatic components, and advantageously allows existing tap hole drilling machines to be used with only one direction of impact to convert two strands.

This object is achieved with the aid of a tap hole drilling machine for two directions of impact, which has the features stated in the main claim.

Further characteristics emerge from the characteristics of the subclaims.

Exemplary embodiments of the invention are shown in the drawings, in which the same parts are provided with the same reference numbers, and are described in more detail below. Show it:

Figure 1 is a schematic front view of the proposed tap hole drilling machine in a first embodiment of the proposal;

Figure 2 is a schematic plan view of the object of Figure 1;

Figure 3 is a schematic side view from the right, partly in section, of the object of Figure 1;

Figure 4, schematically, the position of the proposal for the insertion of the tapping rod into the stuffing compound;

Figure 5, schematically, the position of the proposal for pulling the tapping rod out of the stuffing;

Figure 6, schematically, the position of the proposal for maintenance work; <t 3

Figure 7 is a schematic front view of a second embodiment of the proposal;

Figure 8 is a schematic side view of the article of Figure 7.

Figures 1 to 3 show a tap hole drilling machine, consisting essentially of a carriage 10 and a proposal 12, the latter being the relevant component of a "trolley" 18 within the scope of the invention, which in turn can be moved along the carriage 10. For this purpose, two chain drives 14, 14 'with two coupled drive motors 16 are provided in FIG.

The "trolley" 18 is designed according to the invention essentially in two parts with an upper part 20, which forms the actual carriage which can be moved along the carriage, and a lower part, the aforementioned proposal 12, which is suspended from the carriage 20 in a manner to be described in more detail and around an essentially vertical axis 22 in FIGS. 1 and 3 can be pivoted, namely by a minimum of up to 180 °.

If, starting from FIG. 1, it is assumed that the tap hole of a shaft furnace, not shown, is to the right of the proposal 12, then such a simple proposal, i.e. a pneumatic hammer with only one direction of impact, only to strike towards the tap hole. As a result, such a proposal can only be used to drive the tapping rod into the tamping mass of the tap hole and not to pull it out. If the latter is also to be possible, a pneumatic hammer with two directions of impact, forwards and backwards, with the disadvantages mentioned at the outset must be used.

The simple suggestion mechanism 12 according to FIGS. 1 to 3 is provided with double-sided piston rods 24, 26, for example the piston rod 24 being a t '4 present in any case, as is the case, for example, in the simple suggestion mechanisms according to the prior art, while the piston rod 26 may be attached by appropriate modification of such a proposal. However, it must be pointed out that the presence of double-sided piston rods does not mean that the pneumatic cylinder assigned to the proposal 12 is double-acting, but rather single-acting, whereby in the situation according to FIGS. 1, 4 and 5, only the piston surface assigned to the piston rod 26 with compressed air is applied. Of course, the two piston rods, both of which are assigned to the same pneumatic piston (not shown), always perform movements in the same direction.

The piston rod 24 is used to drive in the tapping rod 28 (see FIGS. 4 and 5). To pull out the rod 28, the simple proposal is rotated through 180 ° about the axis 22, so that the piston rod 26 can pull on the rod 28. These processes are illustrated in FIGS. 4 and 5.

To fix the proposal 12 in its two working positions (Figures 4 and 5) and possibly in any intermediate position (e.g. the position according to Figure 6, corresponding to a swivel angle of 90 °, in which, for example, maintenance work can be carried out cheaply), the invention sees in illustrated embodiment before to firmly press the proposal 12 by means of a correspondingly dimensioned compression spring 30 against the carriage 20. For this purpose, this compression spring 30 is supported on the one hand with its lower extremity on the carriage 20 and on the other hand with its upper extremity on a stop 32 of a bolt 34 assigned to the proposal 12; An unwanted rotation of the proposal 12 around the axis 22 is prevented by a number of pins 36 on the proposal 12, which are engaged with corresponding recesses on the carriage 20.

If the suggestion mechanism 12 is to be pivoted about the axis 22, the bolt 34 assigned to the suggestion mechanism 12 must be pressed down against the pressure of the spring 30 f 5 at least so far that the recesses on the carriage 20 release the pins 36, whereupon the Swivel movement can be initiated. These two movements are generated with the aid of a pneumatic cylinder 38, which is rotatably mounted about its axis 42 on a housing 40 which is fixedly mounted at a predetermined position of the mount 10.

In order to press the proposal mechanism 12 down against the pressure of the spring 30, the pneumatic cylinder 38 is pressurized with compressed air through a line 44, as a result of which the piston rod 46 extends downward. As a result, a lug 48 provided on the lower extremity thereof with a correspondingly shaped recess 50 on the bolt 34 comes into non-rotatable engagement with the latter. By further extending the piston rod 46, the pins 36 are released.

To pivot the proposal 12 about its axis 22, the piston rod 42 must now be imparted a rotary movement about its (vertical) longitudinal axis 46, this is done with the aid of an actuating motor 52, which drives the cylinder 38 via a worm 54 and one on the outside of the jacket of the cylinder 38 provided worm gear teeth 56 rotated. This rotary movement is transmitted to the piston 58 and thus to the piston rod 46. For this purpose, cylinder 38 and piston 58 must of course be connected to one another in a rotationally fixed manner, which can be realized by two drive rods 60, 62.

When the suggestion mechanism 12 has reached its desired position, the piston rod 46 is retracted so that the spring 30 can push the suggestion mechanism 12 upwards and the pins 36 engage in the new position of the suggestion mechanism.

FIGS. 7 and 8 show a second constructive possibility of utilizing the working movements of a piston rod 24 ', which corresponds to the piston rod 24 in FIGS. 1, 4 and 5, both to drive in the tapping rod 28 and to pull it out.

6 t '

For this purpose, a flange 64 is attached to the piston rod 24 ', from which, for example, four tie rods 66 are guided to the left (in FIG. 7), which on their left extremity carry a flange 68 with a tie bolt 70 integral therewith. This draw bolt 70 can thus perform the same tasks as that of the piston rod 26 described in connection with FIGS. 1, 4 and 5. Advantageous in this embodiment according to FIGS. 7 and 8 is, inter alia, that the entire pneumatic cylinder cross section of the proposal mechanism 12 serves as a pressurizing surface Remains available; in the embodiment with a second piston rod 26, this pressurizing surface is of course reduced by the cross section of this piston rod 26.

Claims (8)

1. Tap hole drilling machine for two directions of impact, in particular for use in shaft furnaces, characterized by a proposal (12) with a single-acting pneumatic cylinder, but the working movements of the piston of this pneumatic cylinder can be carried out in two opposite directions in that the proposal (12) by one essential vertical axis (22) can be pivoted around at least up to 180 °. 2. Tap hole drilling machine according to claim 1, characterized in that the proposal (12) is part of a trolley (18), the upper part of which is designed as a carriage (20), which can be moved along a carriage (10), and that the proposal (12) about the vertical axis (22) around this carriage (20) can be pivoted. 3. tap hole drilling machine according to claims 1 and 2, characterized by a vertical bolt (34) in one piece with the proposal mechanism (12), the longitudinal axis of which coincides with the axis (22) and which is provided with a stop (32) on its upper extremity, a compression spring (30), which is coaxial with the bolt (34) and is supported on the carriage (20), acts on the stop (32). 4. tap hole drilling machine according to claims 1 to 3, characterized by with the proposal (12) one-piece vertical pin (36) which are in the working position of the proposal (12) with corresponding recesses on the carriage (20) in engagement and thus an unusual pivoting of Prevent proposal (12) against the carriage (20) around the axis (22). 5. tap hole drilling machine according to any one of claims 1 to 4, characterized by a device for pivoting the proposal (12), consisting of a at a predetermined location of the carriage (10) rotatably mounted pneumatic cylinder (38) "/" 8 with a vertical longitudinal axis (42), a worm gear toothing (65) on the outer jacket of the pneumatic cylinder (38), an actuating motor (52) with worm gear (54) which is in engagement with the worm gear toothing (56), drive rods (60, 62) which hold the piston (58) of the pneumatic cylinder (38) in a rotationally fixed connection with the latter, a nose (48) on the front extremity of the piston rod (42) of the piston (58), this nose (48) non-rotatably with a corresponding one when the piston rod (42) extends Recess (50) on the upper extremity of the bolt (34) is brought into engagement, the bolt (32) and thus the proposal mechanism (12) is pressed down until the pin (36) is released, after which the proposal k (12) can be pivoted by at least 180 ° by switching on the actuating motor (52). 6. tap hole drilling machine according to any one of claims 1 to 5, characterized in that the piston rod (24, 24 ') of the proposal is used to drive in the tapping rod (28) and a rod (26) provided on the opposite extremity of the proposal (12) ) or bolt (70) for pulling out the tapping rod (28) after the suggestion mechanism (12) has been pivoted through 180 °. 7. tap hole drilling machine according to claim 6, characterized in that the rod (26) is attached to the piston of the pneumatic pneumatic cylinder. 8. tap hole drilling machine according to claim 6, characterized in that the bolt (70) via a one-piece flange (68), tie rods (66) and with the piston rod (24 *) one-piece flange is connected to this piston rod (24 ').