Drilling tool device of iron notch drilling machine

Abstract

The utility model discloses a drilling tool device of an iron notch drilling machine, which is characterized in that a striking shaft and a drilling rod of the drilling tool device are connected through a connecting sleeve, an annular groove is arranged at the front end of the striking shaft, a plurality of pin shaft holes are arranged on the connecting sleeve and correspond to the annular groove at the front end of the striking shaft, and pin shafts connected with the annular groove of the striking shaft are arranged in the pin shaft holes. According to the improved design structure, equipment damage caused by looseness between the striking shaft and the connecting sleeve when the drill rod of the taphole drill is disassembled is avoided, the service life of the striking shaft and the service life of the connecting sleeve are greatly prolonged, and meanwhile the use function of the drilling tool device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of taphole machines in front of furnaces, and particularly relates to a drill device for a taphole machine. Background Art

[0002] The taphole machine is the main equipment in front of the blast furnace. The drill device of this equipment opens the taphole through its rotation and forward impact functions before the molten iron flows out of the blast furnace, so that the molten iron flows out. The key structure of the drill device lies in the connection between its striking shaft and the drill pipe, and a drill bit is installed on the drill pipe. Since the drill device works under high-temperature friction conditions, the drill bit on its drill pipe is easily damaged. Therefore, the drill pipe needs to be replaced frequently. The drill device of the existing taphole machine connects the striking shaft and the drill pipe with a connecting sleeve through threads at both ends. Among them, the striking shaft, the connecting sleeve and the drill pipe all rotate forward, and they become tighter and tighter during work; when the drill bit of the drill pipe is damaged and needs to be replaced, generally, the operator will first reverse the striking shaft to remove the drill pipe, and then replace it with a new drill bit. However, this method will cause the connection between the striking shaft and the connecting sleeve to become loose, which is not easily observable, resulting in damage to the striking shaft and the connecting sleeve, and seriously damaging the entire drill device. This not only affects the use function and service life of the taphole machine, but also affects the timely tapping of the entire blast furnace and the subsequent casting production process. Summary of the Utility Model

[0003] The utility model aims to solve the problem that when the vulnerable part, the drill pipe, of the taphole machine is disassembled, the connection between the striking shaft and the connecting sleeve is easily loosened, thereby affecting the use function and service life of the drill pipe and the connecting sleeve. An improved drill device for a taphole machine is proposed. The utility model is a drill device for a taphole machine, in which the striking shaft and the drill pipe are connected through a connecting sleeve. Its characteristics are that the front end of the striking shaft is lengthened and an annular groove is processed at its front end; several pin holes are processed on the connecting sleeve, the pin holes correspond to the annular groove at the front end of the striking shaft, and pins connecting the annular groove of the striking shaft are installed in the pin holes, and the number of the pin holes is at least 3.

[0004] The utility model is further characterized in that a clamping groove is processed on the pin hole of the connecting sleeve, and a clamping sleeve is installed in the clamping groove to limit the axial movement of the pin. A circlip is also arranged on the clamping sleeve to fix the clamping sleeve. A screw hole for convenient loading and unloading is also processed on the pin.

[0005] Another embodiment of the utility model is characterized in that the pin hole on the connecting sleeve is a screw hole, and a bolt connecting the annular groove of the striking shaft is installed in the screw hole; a clamping groove is processed on the screw hole, and a circlip is installed in the clamping groove to limit the axial movement of the bolt. An internal hexagonal hole for convenient loading and unloading is also processed on the bolt.

[0006] The improved drill tool device of the utility model avoids the looseness generated between the striking shaft and the connecting sleeve when the drill pipe of the taphole machine is often disassembled, thus eliminating the impact on production caused by the timely tapping of the blast furnace. It greatly improves the service life of the striking shaft and the connecting sleeve, and enhances the service function and life of the entire drill tool device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic structural diagram of the connection between the drill pipe and the drill bit and the connecting sleeve on the existing taphole machine;

[0008] Figure 2 is a schematic structural diagram of the connection between the striking shaft and the drill pipe and the connecting sleeve of the improved design of the utility model;

[0009] Figure 3 is a schematic structural diagram of another embodiment of the utility model.

[0010] Wherein: 1, striking shaft; 2, connecting sleeve; 3, drill pipe; 4, pin shaft; 5, retaining sleeve; 6, circlip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] The following Figures 1 to 3 and exemplary embodiments are used to describe the present utility model in detail. The figures shown are preferred embodiments. Some components may not be shown when they are clearly described, and some figures may be enlarged, but these preferred embodiments do not limit other embodiments of the present utility model.

[0012] As Figure 1 shown, for the existing drill tool device of the taphole machine, the striking shaft 1 and the drill pipe 3 are connected together through the connecting sleeve 2 and threaded connections at both ends, and a drill bit is installed at the front end of the drill pipe. Among them, the striking shaft 1, the connecting sleeve 2, and the drill pipe 3 all rotate in the forward direction when connected. Since the striking shaft and the drill pipe of the taphole machine rotate at high speed and impact the gunite in the blast furnace taphole under high-temperature friction conditions to open the tapping hole and allow the molten iron to flow out smoothly. Therefore, its drill pipe and drill bit are easily damaged and need to be frequently replaced. When replacing, the operator usually first reversely rotates the striking shaft to remove the drill pipe, and then replaces it with a new drill pipe. This method often causes the loosening between the striking shaft 1 and the connecting sleeve 2 that is not easily observed, resulting in damage to the striking shaft and the connecting sleeve, and even damage to the entire drill tool device. This not only affects the service function and service life of the taphole machine, but also affects the entire production process of the blast furnace.

[0013] Therefore, as Figure 2As shown in the figure, to solve the above problems, the present utility model first lengthens the front end of the striking shaft 1 and processes an annular groove at the lengthened position; at least three pin holes are processed on the connecting sleeve 2 and are corresponding to the size of the annular groove processed at the front end of the striking shaft 1, and a pin 4 connecting the annular groove of the striking shaft is installed in the pin holes. The present utility model also processes a clamping groove on the pin holes on the connecting sleeve 2, installs a clamping sleeve 5 in the clamping groove, and also installs a snap spring 6 on the clamping sleeve 5 to fix the clamping sleeve to limit the loosening or falling off of the pin 4. The present utility model also processes a screw hole for convenient loading and unloading on the central axis of the pin 4.

[0014] The present utility model also designs another implementation manner, designs the pin holes on the connecting sleeve 2 as screw holes, installs bolts connecting the annular groove of the striking shaft in the screw holes; a clamping groove is processed on the screw holes, and a snap spring is installed in the clamping groove to limit the axial movement of the bolts. The bolts are also processed with internal hexagonal holes for convenient loading and unloading.

[0015] When the improved structure of the present utility model is actually used, since the connection between the striking shaft 1 and the connecting sleeve 2 is tight and firm, the loosening between the components of the striking shaft 1 and the connecting sleeve 2 is avoided when disassembling the drill pipe 3, greatly improving the rotary striking ability of the taphole opener drilling tool device, and at the same time improving the service life of the striking shaft 1 and the connecting sleeve 2.

[0016] The present utility model can also be used for the connection between the striking shaft and the drill pipe on various rock drills, and the structural strength and dimensions are improved according to the actual use situation.

[0017] Embodiment 1

[0018] Referring to Figure 2 , in this embodiment, first, the front end of the striking shaft 1 is lengthened by 9.2 cm on the original basis, and an annular groove with a width of 2 cm is processed at the lengthened position; then, three pin holes with a diameter of 2 cm are evenly distributed and processed on the connecting sleeve 2 to make them corresponding to the size of the annular groove processed at the front end of the striking shaft 1; a clamping groove for assembling the clamping sleeve 5 is processed on the pin holes on the connecting sleeve 2, and then a pin 4 connecting the annular groove of the striking shaft 1 is inserted into each pin hole, and the clamping sleeve 5 is installed in the clamping groove on the connecting sleeve 2 to prevent the loosening of the pin; a snap spring 6 is also arranged on the clamping sleeve 5 to fix the clamping sleeve 5, so that the striking shaft 1 and the connecting sleeve 2 are firmly connected together. In this embodiment, a screw hole for convenient loading and unloading is processed at the central position of the pin 4 for the disassembly of the connecting sleeve 2 and the striking shaft 1.

[0019] In actual replacement of the drill pipe 3 in this embodiment, since the connection between the impact shaft 1 and the connecting sleeve 2 is tight and firm, no looseness will occur between the impact shaft 1 and the connecting sleeve 2 assembly. The rotation and impact capabilities during the operation of the drilling tool device are greatly improved, and the service lives of the impact shaft 1 and the connecting sleeve 2 are prolonged. For the existing drill tool device of the taphole opener, it can only be used for 1-2 months after being disassembled 3-5 times, while the utility model can be used for half a year or more. Compared with the existing drill tool device, its service life is increased by two to three times.

[0020] Embodiment 2

[0021] Referring to Figure 3 , this embodiment is another alternative implementation. The same as Embodiment 1, in this embodiment, the front end of the drill pipe 1 is first lengthened to machine an annular groove with a width of 2 cm. Four threaded holes are machined on the connecting sleeve 2 as another form of the pin shaft hole, which corresponds to the annular groove machined at the front end of the impact shaft 1. A clamping sleeve 5 is machined with a clamping groove above the threaded hole. Then, a cylindrical bolt connecting the annular groove of the impact shaft 1 is inserted into each threaded hole. To prevent the bolt from loosening, the clamping sleeve 5 is also inserted into the clamping groove above the threaded hole to clamp the cylindrical bolt, so that the impact shaft 1 and the connecting sleeve 2 are firmly connected together. In this embodiment, a disassembly hexagon socket hole is machined at the center position of the bolt for the maintenance and disassembly of the connecting sleeve 2 and the impact shaft 1. When the drill pipe 3 is damaged and disassembled, there is also no looseness between the impact shaft 1 and the connecting sleeve 2 assembly, which improves the service life of the drilling tool device.

[0022] The above embodiments of the utility model are merely exemplary. Without departing from the design principle of the utility model, various changes can be made to these embodiments, and these changes will also be within the scope of the claims of the utility model.

Claims

1. A drill tool device for an iron notch opener, wherein the impact shaft and the drill pipe are connected by a connecting sleeve, and it is characterized in that, The front end of the striking shaft is lengthened and an annular groove is machined at its front end; a number of pin shaft holes are machined on the connecting sleeve, the pin shaft holes correspond to the annular groove at the front end of the striking shaft, and a pin shaft connecting the annular groove of the striking shaft is installed in the pin shaft holes.

2. The drill tool device according to claim 1, characterized in that, A clamping groove is machined on the pin shaft hole of the connecting sleeve, and a clamping sleeve is installed in the clamping groove to limit the axial movement of the pin shaft.

3. The drill tool device according to claim 2, characterized in that, A circlip is further arranged on the clamping sleeve to fix the clamping sleeve.

4. The drill tool device according to claim 1, characterized in that, There are at least 3 pin shaft holes.

5. The drill tool device according to claim 1, characterized in that, A screw hole for convenient loading and unloading is further machined on the pin shaft.

6. The drill tool device according to claim 2, characterized in that, The pin shaft hole on the connecting sleeve is a screw hole, and a bolt connecting the annular groove of the striking shaft is installed in the screw hole.

7. The drill tool device according to claim 6, characterized in that, A clamping groove is machined on the screw hole, and a circlip is installed in the clamping groove to limit the axial movement of the bolt.

8. The drill tool device according to claim 7, characterized in that, A screw hole or an internal hexagonal hole for convenient loading and unloading is further machined on the bolt.

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