JPS6330956Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an oxygen opening device for a tap outlet of a blast furnace and a melting furnace for non-ferrous metals, etc.

(Prior art) In the case of blast furnaces, when it becomes difficult to open the tap hole using a hammer or metal rod of a percussion type hole drill,
A separate oxygen lance 15 was prepared, and the fifth
) or an oxygen opening device 8 configured to be suspended from the tip of the rotating arm 5 so as to be able to rise and fall freely (
112480) (Utility Model Application No. 59-112480) According to Figure 6,
A lance 15 was applied to the tap hole 13, heat was applied to the lance with oxygen, and the combustion heat of the lance melted and removed the blockages. The oxygen lance 15 to be supplied in this work was used by connecting straight pipes of a fixed length to form a long pipe.

(Problem that the invention aims to solve) In conventional oxygen drilling work, after connecting regular length pipes to make a long pipe, the oxygen main pipe and the end of the long pipe on the side opposite to the tap hole are connected. However, it was used as a lance by setting it in an oxygen hole opening device or holding it manually to conduct oxygen, but in this case, the following problems occurred.

(1) Every time oxygen hole drilling work was performed, a long pipe of 20 to 30 meters was prepared and connected to the oxygen main pipe and either held by hand (Fig. 5) or set in the oxygen hole drilling machine (Fig. 6). As a result, as the drilling progressed, the lance protruding from the rear of the oxygen hole drilling machine had to be held by hand at regular intervals to prevent it from getting caught on surrounding equipment, which resulted in the need for more personnel than other casthouse work.

(2) When the consumption of oxygen lance increases during hole drilling work, if the predetermined expected consumption set length is not enough, in extreme cases the work may have to be temporarily stopped and a new lance installed, resulting in a significant drop in work efficiency. did.

(3) It was necessary to connect pipes of fixed length, and breakage and bending occurred at the joints.

(4) Since long pipes are used, it is necessary to secure extra installation space for transportation, storage, etc.

(5) Manually holding the lance is extremely dangerous due to sparks and flames.

(Means and effects for solving the problem) The present invention is a device in which an oxygen lance is pressed against a spout and a hole is opened by blowing oxygen. This oxygen opening device for a melting furnace outlet is characterized by comprising a pipe straightening and feeding device for straightening and feeding an oxygen lance straight from a reel.

In other words, an oxygen lance is a 150 to 200 m long pipe that is formed into a coil shape, stored in a coiled pipe storage reel, and then straightened into a straight pipe to be used as an oxygen lance. There is no need to transport long, straight pipe lances or attach them to oxygen drilling machines.

Since the lance is long and not a straight pipe, there is no need for the operator to hold the lance in the middle.

Since the lance is stored in a coiled shape, it is compact and requires little space.

Oxygen can be supplied continuously for a long time, so there is no need to change the lance during hole drilling.

Further, the oxygen lance is configured to be straightened into a straight line by a straightening feeding device and then advanced and supplied to the tap, and remote control is also possible.

(Example) The present invention will be described below based on drawings of an example in which the present invention is used in a blast furnace taphole.

1 and 2, the rotating shaft 3 attached to the tuyere deck 1 and the rotating air motor 20 rotate the oxygen drilling machine 8 via the rotating arm 5 from the retracted position to the taphole. move it. Further, the oxygen hole opening machine 8 is configured to be rotatable around a support shaft at the tip of the rotating arm 5. The straightening feed device 23 of the oxygen hole drilling machine 8 is lowered as a whole along the guide by the up-down cylinder 9 and is placed at the axial center position of the tap hole 13. Oxygen supplied from the main pipe is transferred to the coiled pipe storage reel 2 via the flexible joint 21.
2, and is further supplied with a pinch roller 24, a fixed roller 26, and a straightening roller 25.
The oxygen is continuously supplied to the oxygen lance 15, which is a straight pipe, by passing through a correction feeding device 23 consisting of a straight pipe.

In FIG. 1, the coiled pipe storage reel 22
The pinch roller 24 is connected to a synchronous pinion 27 and a pin gear 2 attached to the outer periphery of the reel 22.
8, the oxygen lance 15 is unwound from the storage reel and inserted into the tap hole 13 by the forward rotation of the pinch roller 24. Although FIG. 1 shows a mechanical synchronization method, it goes without saying that synchronization can be achieved electrically or by other methods or combinations thereof. During the hole-opening operation, the feed speed of the pinch roller 24 is adjusted depending on the degree of wear of the oxygen lance 15, and the oxygen lance 15 is continuously supplied.

Immediately after the hole drilling operation is completed, the pinch roller 2
4, the coiled pipe storage reel 22
After the straightening feed device 23 is raised by the vertical cylinder 9, the swing arm 5 is turned and the entire device is stored in the evacuation place.

Another embodiment will be explained with reference to FIGS. 3 and 4.

The rotating shaft 3 and the rotating air motor 20 attached to the tuyere deck 1 rotate the pipe straightening feed device 23 via the rotating arm 5, and move it from the retracted position to the tap hole portion. Correction feeding device 23
is lowered as a whole by the vertical cylinder 9 and placed at the axial center position of the tap hole 13. Oxygen supplied from the oxygen main pipe is supplied to the coiled pipe of the coiled pipe storage reel 22 installed on the moving trolley 30 via the flexible connection joint 21, and is installed at the tip of the rotating arm by the feeding device 29. The oxygen is supplied to the oxygen lance 15, which has become a straight pipe, by passing through the straightening feed device 23.

In FIG. 3, the coiled pipe storage reel 2
2 and the pinch roller 24 are synchronized via a synchronizing pinion 27 and a pin gear 28 attached to the outer periphery of the reel 22, and the oxygen lance 15 is paid out from the storage reel by the forward rotation of the pinch roller 24, and corrected feeding is performed. It is sent to the device 23, and is fed out by electrically synchronizing the drive system of the pinch roller 24 in the device with the drive system of the pinch roller 24 at the outlet of the storage reel, and inserted into the tap hole 13. During the hole-opening operation, the feed speed of the pinch roller 24 is adjusted depending on the degree of wear of the oxygen lance 15, and the oxygen lance 15 is continuously supplied.

Immediately after the hole drilling operation is completed, the pinch roller 2
4, the coiled pipe storage reel 22
Then, the straightening feed device 23 is raised by the vertical cylinder 9, and the swing arm 5 is turned and retracted, and the moving cart 30 carrying the pipe storage reel 22 is moved by the swing arm 5. Store it in the evacuation area according to the situation.

(Effects of the invention) The invention has the following effects in improving the function and work safety of the oxygen hole drilling machine.

(1) There is no longer any need for transporting, installing, or manually holding long pipes during each oxygen hole drilling operation, which was previously required for each oxygen hole drilling operation, and the number of personnel required during peak operations can be reduced.
significantly reduced.

(2) By using a long coiled pipe, the oxygen lance can be continuously supplied, and it can be quickly moved to the set position for hole opening and evacuated when finished. It is easy to use, and because it is a coiled pipe, the required space is small.

(3) By automating the oxygen hole drilling work, which is highly dangerous due to flames and flying sparks from ejected high-temperature materials, by remote control, it is possible to avoid risks such as burns.

[Brief explanation of drawings]

Figure 1 is a side view of the oxygen hole punching machine of the present invention, Figure 2 is
The figure is a plan view of the oxygen hole opening machine of the present invention in a position where it has been rotated to the front of the tap hole, Figure 3 is a side view of another embodiment of the present invention, and Figure 4 is the oxygen hole opening machine of the invention shown in Figure 3. Figure 5 is a plan view of the machine rotated to the front of the taphole, and Figure 6 is a working diagram showing the conventional manual oxygen hole opening method.
The figure is a front view of a conventional oxygen drilling machine in the drilling set position. 1... Tuyere deck, 2... Bearing, 3... Swivel shaft, 4... Pinion, 5... Swivel arm, 6...
Swivel cylinder, 7...Rack, 8...Oxygen hole opening machine, 9...Upper/lower cylinder, 10...Roller chain, 11...Guide roller, 12...
... steady rest support, 13 ... taphole, 14 ... gutter cover, 15 ... oxygen lance, 20 ... air motor for rotation, 21 ... flexible connection joint, 22 ... coiled pipe storage reel, 23 ... Straightening feed device, 24 ... Pinch roller, 25 ... Straightening roller, 26 ... Fixed roller, 27 ... Synchronous pinion, 28 ... Pin gear, 29 ... Feeding device,
30...Moving trolley, 33...Oxygen, 34...Oxygen valve, 35...Oxygen hose, 36...Flying pig iron, 37...Blowout gas, 38...Percussion type hole drilling machine,
39... Replenishment lance, 40... Drill, 41... Metal rod, A, B, C, D, E... Workers placed during hole drilling work.

Claims (1)

[Scope of utility model registration request] In a device that presses an oxygen lance against a spout and blows oxygen to open the hole, a coiled pipe storage reel that stores the oxygen lance in a coil shape and a pipe straightening and feeding device that straightens and sends out the oxygen lance in a straight line from the reel. An oxygen opening device for a melting furnace outlet, characterized by comprising: