KR19980037557U - Hammer drill in the furnace opening of the furnace - Google Patents

Abstract

The present invention prevents damage to the hammer drill and prolongs its life by preventing leakage of high pressure nitrogen and cooling water when opening the exit port by the single opening method using the opening machine used for the opening of the furnace exit port. The hammer drill of the furnace opening of the blast furnace is made possible, and in the opening machine for opening the furnace opening of the furnace by equipping a hammer drill for injecting cooling water and nitrogen, a spring for supplying the cooling water and nitrogen The outer heat-resistant rubber hose 203 is connected to the rear end side via the socket 201, and the center portion is formed of an integral tube 23-1, 23-2, 23-3, and the tip is The screw rod 102 is characterized by supplying cooling water and nitrogen by an integral waterproof spray tube extending to the tip outlet side.

Description

Hammer drill in the furnace opening of the furnace

The present invention relates to a hole opening machine used in the opening of the furnace exit port, more specifically, the damage generated in the hammer drill used to open the exit port by spraying a mixed liquid of high-pressure nitrogen and cooling water by a blow opening method Furnace to extend the life of the hammer drill by preventing the water from the connection of the injection tube and solve the problems such as lag, opening delay, leakage increase due to manual operation and adjustment of the coolant injection, and improved productivity and reduced workload. It relates to the hammer drill of the exit opening machine.

In the furnace equipment, an opening machine for opening one of the plurality of exit ports formed in the furnace and discharging the molten iron therefrom is provided. In the conventional opening method, a high temperature exit hole is drilled by a drill bit. As a result of this problem, the depth of the drill is very high (about 3000mm) and the temperature is very high. Therefore, the drill is deteriorated and cannot be opened at one time. To complete.

However, this conventional exit opening method causes heavy heat load, and in recent years, opening the exit port by a technique called a single opening method, which improves the cooling function of the drill bit contact surface. It is a method of opening and spraying nitrogen and cooling water at high pressure (approximately 15㎏ / ㎠) and opening it all at once.However, it has achieved breakthrough effects such as reducing the number of workers. (1) Frequent breakage of the hammer drill due to water leakage from the injection tube connection in the process of being transmitted to the drill bit 13 through the inside, and precise operation by the manual operation of the cooling water supply, the number of stages and the flow rate adjustment This becomes very difficult.

2 is a view illustrating the assembly of a conventional drill hammer drill, the drill hammer drill hole is largely fixed hammer piston 103, screw rod 102, rotary chuck 107 and chuck bushing 108, the operation gears 110 (111) (113), etc., the open-air drill rotational force is transmitted from the air motor gear 113 to the transmission gear 110, 111 to the rotating chuck 107 and the rotating chuck 107 is a screw rod Rotate 102 and the screw rod 102 passes through the reverse hammer 2 to rotate the tapping socket 7, the opening pipe 12, and the drill bit 13 at the end of the opening pipe to open the outlet 11. It will open.

On the other hand, the outlet refractories have high temperature and strong cohesion as they enter the interior, which degrades the wear of the end of the drill bit (13), thereby rapidly cooling the drill bit and blowing the drill cut refractory material into the bit grooves. The injection nitrogen and cooling water are simultaneously sprayed, which is blown at the drill bit tip contact surface to cool the drill bit.

If the tap hole is opened in the middle, it is not easily opened by the rotational force of the drill bit alone. By operating the hammer hammer piston 103, the forward force is applied to the screw rod 102 and transmitted to the drill bit. A pioneer will be opened.

When the operator manually opens the nitrogen and jet coolant manual shutoff valve 33 at the same time as the drill bit 13 rotates during the opening work (the coolant flow control valve is fixed to a certain degree), the high pressure nitrogen and jet coolant is As shown in FIG. 3, the injection tube gland 26 and the injection are carried out from the rear end of the hammer drill via a flexible hose 32 → union 31 and 30 → nipple 29 → connecting cap 28. Primary discharge is carried out from the rear end of the tube 23, again through the injection tube 23, and injected from the end of the tube, and then through the internal passage of the screw rod 102, tapping socket (7) → opening pipe (12) → drill bit (13) Sprayed to the tip.

The method of spraying the coolant is to open the coolant manual shut-off side 33 at the moment when the drill bit tip touches the exit port while the operator manually operates the opening, and if the flow rate of the coolant increases by a certain amount or more, the hammer drill 1 Since it is immersed into the inner working part is fixed fixed to a certain amount in the manual flow control valve 34 and the problem of the conventional cooling water injection device is as follows.

The general opening method of the exit port has a great effect in terms of reducing the work load and convenience, but the inlet nipple (29) and the inlet nipple (29) have to be mixed and sprayed with the high-pressure nitrogen into the hammer drill (1) which is driven by pneumatic operation. The leakage occurs between the connection part between the rear end of the injection tube 23 and the connection end of the injection tube and the internal pneumatic flow path connection at the rear end of the screw rod 102, so that the hammer piston 103, the rotating chuck 107, the chuck bushing 108, and the washer bushing ( 106) and cooling water penetrates into each working flow path such as gears 110, 111, 113, etc. It must be operated manually according to the opening condition of the piers (drill bit forward speed, opening chip refractory color, etc.), which makes it difficult to operate correctly and has a risk of explosion, and it is a major cause of increased workload, stiff yellowing and stable operation.

The present invention has been made in order to solve such a conventional problem, the purpose of the injection tube gland inside the hammer drill from the outside of the rear end of the hammer drill is mounted on the opening to open the furnace exit opening by a single opening method, By inserting the injection tube of nitrogen and coolant mixed water into the integral type to the fixed hammer piston and screw rod end outlet side, it is possible to prevent the hammer drill damage by preventing the hammer drill from being accidentally inserted. It is to provide a hammer drill of the blast furnace opening hole which enables the increase and automatic remote operation to reduce the workload and reduce the cost by remotely automating the cooling water injection and flow rate control.

1 is a general configuration diagram showing the main components and the exit surface of the general opening machine from the side

Figure 2a to 2c is an assembly view showing a hammer drill which is a conventional opening machine operation portion

3 is an assembly structure showing the structural roll peripheral parts in a state of assembling the conventional coolant spray tube set (SET)

Figure 4 is an exploded perspective view showing a conventional cooling water injection tube

Figure 5 is an exploded perspective view showing an integrated waterproof spray tube used for the hammer drill of the furnace opening opening device according to the present invention

6 is an assembly view of the integrated waterproof tube used for the hammer drill of the furnace opening hole opening device according to the present invention

7 is an assembly structure of the integrated waterproof spray tube set and the hammer drill peripheral parts of the present invention are assembled and the cooling water automatic spray unit is connected.

* Description of the symbols for the main parts of the drawings *

1 ... hammer drill

11 ... exit

13 ... bits

23-1, 23-2, 23-3 ... integral waterproof spray tube

As a technical configuration for achieving the above object, the present invention is equipped with a hammer drill for injecting cooling water and nitrogen in the opening machine for opening the exit of the furnace, the spring is supplied for supplying the cooling water and nitrogen The heat-resistant rubber hose is connected to the rear end through the socket, the center part is made of an integral tube, and the end is supplied with cooling water and nitrogen by an integral waterproof spray tube extending to the screw rod end outlet side. The hammer drill of the opening of the blast furnace to make.

Hereinafter, the present invention will be described in detail.

The present invention is supplied to the hammer drill, which is a key component of the opening machine, which is a device for drawing out the molten iron (smooth water) manufactured in the blast furnace, so that the high pressure nitrogen and cooling water is used to improve the cooling efficiency of the drill bit front end and the exit contact surface. As to prevent the mixed water leak, it is to use the integral waterproof spray tube that is sprayed from the tip of the screw rod 102 to escape from the inside of the hammer drill as shown in Figs.

That is, the integral waterproof spray tube body 23-1, 23-2, 23-3 and the direct connection socket 201, heat-resistant springs, seismic rubber hose 203 and the connection nipple 202 and other It is composed of a support device and a coolant spray automatic valve (35).

The injection tube main body 23-1 is formed longer than the conventional injection tube 23 (about 200 mm), and is close to the inclined jaw of the screw rod 102 at an appropriate interval (about 4 mm) and the front end of the injection tube. The tip of (23-2) is welded and attached to the tip of the injection tube main body at a length of 420 mm so that the tip of the hammer drill completely exits the inside of the hammer drill to the tip of the screw rod, and the injection tube rear end screw 23-3 is welded to the rear end of the injection tube main body. It protrudes outside the injection tube gland 26 and the connection cap 28.

The support fixing of the integral waterproof spray tube (23-1) (23-2) (23-3) is closely supported by the injection tube gland (26) and the connection cap (28) together with the internal support rubber (21), and is connected to the gland. Sealing gaskets 25 and 27 are inserted between the caps, respectively, and the connecting sockets 201 are fastened to the rear end screw portion 23-3 protruding from the outside of the injection tube. The seismic rubber hose 203 is fastened to withstand vibration and high heat.

In addition, the cooling water injection automatic valve 35 is installed at the rear end of the manual shut-off valve 33 and the flow control valve 34 so that the circuit can be automatically operated remotely and the flow control valve can be controlled remotely. Installation is connected and automated.

The operation of the present invention is to open the opening port opening work first, by aligning the center of the drill bit 13 to the center of the exit port 11 by remote operation, and then press the drilling start button with the remote control to move forward with the rotation of the drill bit. At the same time, the cooling water vehicle short side 35 shown in FIG. 7 is opened and the cooling water supplied at a high pressure (15 kg / cm 2) is mixed with the injection nitrogen to directly connect the socket 201 from the spring sheath rubber hose 203. Screw rod 102 beyond the end of the operating part of the hammer drill 1 without connecting parts or connecting gaps (space) to the tip of the integral waterproof spray tube (23-1) (23-2) (23-3) via It is sprayed from the tip so that the mixed water can not be submerged structurally into the operating part such as hammer piston 103, rotary chuck 107, injection tube gland 26, gears, etc. Color of Refractory Chip The remote control by opening and closing the coolant flow control automatic valve (34-1) by remote control while seeing the advance speed of the rug and drill bit.

After the completion of the opening, the stage of injection cooling water is automatically cut off by pressing the start button of the reverse direction of the drill bit 13 and closing the vehicle short side (3%).

In other words, by integrating the injection tube to prevent the leakage of coolant and nitrogen therefrom to prevent damage to the hammer drill fundamentally, and to achieve the automation of the cooling water spray to reduce the work load due to the establishment of a single opening method and remote remote control operation and stable It will contribute greatly to the operation.

According to the hammer drill of the furnace exit opening machine according to the present invention as described above, the injection tube gland inside the hammer drill from the outside of the rear end of the hammer drill mounted on the hole opening in order to open the furnace exit opening by a single opening method, By inserting the injection tube of nitrogen and cooling water mixed water integrally to the fixed hammer piston and the screw rod end outlet side, it is possible to prevent the hammer drill damage accident by preventing the hammer drill from being damaged. It is possible to increase and automatic remote operation, which has the excellent practical effect to reduce the workload and reduce the cost by remotely automating the cooling water injection and flow rate control.

Claims (1)

In the opening machine for opening the outlet of the furnace by equipping a hammer drill for injecting cooling water and nitrogen, Heat-resistant rubber hose 203, which is provided with a spring for supplying cooling water and nitrogen, is connected to the rear end side via the socket 201, and the center portion is an integral tube (23-1) (23-2) (23). -3), the end of the hammer rod of the opening of the furnace opening, characterized in that for supplying the cooling water and nitrogen by the integral waterproof spray tube extending to the end of the screw rod (102).