JPS6191305A - Method and device for changing mud - Google Patents

Abstract

PURPOSE:To save manpower for a heavy closing operation of a tap hole in front of a blast furnace where the working environment is poor by putting the molded mud into a mud container and feeding forcibly the mud with a high-pressure gas into a mud gun by making use of a pipe. CONSTITUTION:The molded mud for closing the tap hole is put into the mud container 5 and the pipe 9 for pressure feeding is provided between the same and the mud gun 1 in the operation for closing the tap hole by the mud in the stage of ending the tapping operation of the blast furnace. The mud is fed out by a feeding-out device 4 into the mud container 5 and is dropped into the pipe 9. The gate 6 in the pipe 9 is rotated at the same instant and a valve 17 is opened to push the slider 23 in the pipe 9 by the pressure gas 27 such as high-pressure air to feed forcibly the mud 24 by the slider 23 into the pipe 9 thereby charging the mud from the inlet 2 of the mud gun 1 into the mud gun. Since the mud is forcibly fed by gas, manpower for the operation of charging the mud to the mud gun in adverse environment is conserved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a mud charging method and device.
Specifically, it is used as a method and a device for introducing mud into a mud gun when the mud gun is used to block the tap hole of a blast furnace with mud.

Conventional technology To introduce mud into a conventional mud gun, first, the mud raw material and the binder tar are kneaded, and then formed into a cube of about 20 centimeters (weighing about 11 kilograms).
Approximately 40 pieces are packed into plastic bags by hand (weighing approx.
40 kg). This amount is enough for one taphole blockage. Next, the approximately 40 pieces of mud were placed in a packet and transported to the vicinity of the mud gun using a crane, where they were manually lifted one by one and placed into the barrel of the Matsutoga/.

Problems to be Solved by the Invention As mentioned above, in the conventional technology, the work of throwing a large amount of mud into a mud gun was a very labor-intensive task, and the recent technology Because molten metal remains in the blast furnace's tap trough, the area around the mud gun is hot and there is a lot of dust, creating an extremely poor working environment.

In addition, the blast furnace is tapped 16 to 15 times a day, and each time it is necessary to close the tap hole with a mud gun, so the mud tapping work described above takes place 13 to 15 times a day, which is very hard labor. It has become. In addition, in recent years, attempts have been made to use articulated robots to feed mud from packets into matsutogas, but the robots are large and have space problems, and require computer control. In other words, it is necessary to move the robot arm according to the position of each mud within the packet, so there is a problem in that it becomes expensive. The present invention seeks to solve the above-mentioned problems of the prior art. In other words, the present invention mechanizes the work of introducing mud into a matsutoga without relying on human labor, thereby making it possible to save labor in the mud throwing work and making the mud feeding device more compact. The purpose of the present invention is to provide a method of introducing mud and a device therefor.

Means for Solving the Problem Molded mud is stored in a mud container, the molded mud is cut out from this container, gas is transferred through a pressure pipe, and the mud is charged into a mud gun.

That is, the structure of the mud charging method of the present invention is to store the molded mud in a mud container, and to transfer the mud to at least one section of the mat charging path between the mud container and the mud gun. It is characterized in that a pipe is provided to forcefully transport the mud using gas.

Further, the mud feeding device of the present invention has a configuration including a mud container that stores molded mud, a pressure feeding device that pumps the mud by a slider that moves in a pressure feeding pipe with pressure gas, and the mud container. The present invention is characterized by comprising a mud cutting device that receives the mud and guides the mud to the pressure feeding device.

The formed mud is stored in a mud storage container, transported by a crane, and placed in a mud cutting device. Then, the mud is cut out by a mud cutting device, transferred through a pressure pipe by a pressure gas source such as compressed air, and the mud is introduced into a mud inlet of a mud gun. By doing this, mud can be mechanically fed into the mud gun without relying on one person's effort.

Embodiment FIG. 1 shows an embodiment of the apparatus of the present invention, and FIGS. 2 to 5 show each part of FIG. 1 on an enlarged scale.

In Figure 1, 1 is a mud gun, 2 is a mud inlet,
5 is a tuyere work floor, 4 is a mud cutting device, 5 is a mud container, 6 is a gate, 7 is a pressure feeding device, 8 is a tip pipe of the device 7, 9 is also a pressure feeding pipe, and 10 is provided in the pipe 9. The valve 11 is a support supporting the pipe 9 from the tuyere working bed 3. That is, the tuyere working floor 5
A mud cutting device 4 is installed on the top.

This mud cutting device 4 is equipped with four mud containers 5 containing molded mud 24, which will be described later, and a pressure feeding device 7 is located at the lower center thereof.

The tip pipe 8 at this tip reaches above the mud inlet 2 of the mud gun 1.

As shown in an enlarged view in FIG.
The gate 48 is removably inserted into the groove 49.

The mud cutting device 4 includes a sea urchin, a frame 43, a roller 44, a stopper 45, and a cylinder 46, as shown in FIG.
, a chute 47, etc., and the pressure feeders f and 11 of the pressure feeder 7 are arranged below the chute 47.

The pressure-feeding device 7 consists of a pressure-feeding pipe 9 with a tip pipe 8 that can be oscillated, and the pressure-feeding pipe 9 has a rotating end pipe 8 on the side of the mud cutting device 4, as shown in an enlarged view in FIG. It comes with 2 possible gateroes. And the third
As seen in the figure and FIG.
It is rotated via a pinion 26 by a gear 25 fixed to the gate 6. Note that the gears 25 of the two gates 6 are each meshed with a dedicated pinion 26 so that they can be driven independently. The pressure pipe 9 also has an opening 20 corresponding to the opening 21 of the gate 6.
Around this opening 20, an airtight 7-hole material 22 is arranged. A slider 23 is provided at the end of the pressure pipe 9.
There is a stopper 14 and a spring 130 on the upstream side.
There is a lid 12 inside.

The slider 23 is a cylindrical slidable plug having an outer diameter slightly smaller than the inner diameter of the pressure pipe 9, and is made of wood or metal.

As shown in FIG. 3, the lid 12 has a valve 17.
A pipe 15 for introducing pressure gas 27 such as compressed air into the pressure feeding pipe 9 via an oil supply device 16 is connected to the pipe 9. A pipe 18 with a valve 19 is attached to the pipe 5.

Further, as shown in FIG. 2, there is a knob 10 as a gate valve on the side of the tip pipe 8 of the pressure-feeding pipe 9, and this valve 10 includes a valve body 30 having an opening 31 in the center, and a knob 10 that serves as a gate valve. A stopper 40 with a spring 41 is provided on the pressure pipe 9 on the side of the mud cutting device 4 of the valve 10, and between this stopper 40 and the valve 10, the valve 39 A pipe 57 with an oil feeder 58 opens into the pressure pipe 9. Further, on the tip pipe B side of the pressure feeding pipe 9, a motor 55 supported by a bracket 32 and a pinion 54 rotationally driven by this motor 53 are provided. 55 allows the tip pipe 8 to swing horizontally about the shaft 36. Note that the tip pipe 8 has a larger diameter than the pressure pipe 9 in order to facilitate passage of the molding mud 24.

In the mud feeding device configured as shown in the figure, a crane (not shown) transports the mud containers 5 containing molded mud, and transports the four mud containers 5 to the mud cutting device. 40 onto the roller 44. Then, as shown in FIG. 5, the mud container 5 moves on the rollers 44 due to its own weight and is automatically set in a fixed position. Then, when the gate 48 of one mud container 5 is removed, the molded mud 24 rolls on the bottom surface of the mud container 5. It is stopped by the stopper 45 and enters a waiting state for cutting out.

Next, the gate 6 corresponding to the mud container 5 waiting to be cut out is rotated, and the opening 20 of the pressure pipe 9 and the gate 6 are rotated.
Align the openings 21 of the two. In this state, the other gate 6 is kept closed. At this time, the slider 25 is
In the position shown in the figure, valves 17 and 19 in FIG. 3 and valve 59 in FIG. 2 are closed, and valve 10 in FIG. 2 is open.

Next, the stopper 45 shown in FIG.
After cutting out only one molded mud 24 into the pressure feeding pipe 9, the gate 6 is rotated and the pipe 9 is lowered.
The opening 20 is closed.

In addition, when one molded mud 24 passes through the stopper 45,
It immediately rises and stops the next molding mud 24.

In this state, when the valve 17 is opened, the slider 23 shown in FIG. The slider 23 is stopped by the stone C40 when it reaches the end of the pressure pipe 9, as shown in Fig. 2, and the molding is completed. Only Mad 24 due to inertia,
゛The pulp 10 passes through the opening 51 of the valve body 50 and jumps into the tip pipe 8, and is thrown into the Matsutoga/1 from the mud inlet 2.

After this, valves 10 and 17 are closed, and valves 19 and 59 are closed.
When opened, pressurized gas 27 flows from pipe 37 to pressure pipe 9
2 to return the slider 23 from the position shown in FIG. 2 to the initial position shown in FIG. At this time, the valve 19 acts as an exhaust valve.

Next, the gate 6 is rotated to open, and the cutting operation described above is started. That's all in one cycle.

When this is repeated 10 times, one mud container 5 becomes empty.

This operation is repeated for the four mud containers 5, and a total of 40 molded muds 24 are put into the mud gun 1.

The oil supply devices 16 and 68 atomize oil into the pressure gas 27 to lubricate the inner wall of the pressure pipe 9 and reduce the sliding resistance between the molded mud 24 and the slider 23 and the inner wall of the pressure pipe 9. It's no good. Further, the spheres 15 and 41 are used to reduce the shock when the slider 23 collides with the stopper 14 and the stopper 40. Further, the swinging of the tip pipe 8 is to facilitate cleaning inside the tip pipe 8 during maintenance.

Although it is desirable to wrap the molded mud 24 in vinyl, the vinyl wrapping may be omitted if the mud 24 is sufficiently cured, its hardness is controlled, and the mud 24 is prevented from adhering to each other.

In addition, the molded mud 24 is not directly pumped with the pressurized gas 27 but is pumped through the slider 23 because, in the absence of the slider 25, there is a gap between the outer diameter of the molded mud 24 and the inner diameter of the pressure feeding pipe 9. In order to reduce the leakage of pressurized gas 27 from the pressure gas tube 27, the inner diameter of the pressure tube 9 has to be made smaller. This is because there is a risk that the mud 24 may block the pumping tube 9. That is, by making the inner diameter of the pressure pipe 9 considerably larger than the outer diameter of the molded mud 24, and instead making the outer diameter of the non-deformable slider 25 slightly smaller than the inner diameter of the pressure pipe 9, This is because the aforementioned leakage and blockage can be prevented. The slider 23 also serves to clean the inside of the pressure feed nozzle 9 during sliding.

In the above embodiment, the tip pipe 8 was used, but when working on the tuyeres directly above the mud inlet 2, a hole is drilled in the floor 3, and the pressure feed pipe 9 is inserted so that the tip of the pressure feed pipe 9 faces vertically into the hole. The tip pipe 8 may be omitted if it is arranged above the tuyere work floor 5. .

Effects of the Invention The mud charging method of the present invention stores molded mud in a mud container, and includes a pressure feeding pipe for transporting the mud to at least a section of a mud charging path between the mud container and a mud gun. Since the mud is conveyed under pressure using gas, the worker is freed from the heavy labor of adding the mud, and the time required for adding the mud can be shortened. Because of this, the installation space is small and there is no need to make any bends, so the mud container can be moved away from the vicinity of the mud gun, which has a bad working environment with high temperatures and lots of dust, and can be moved to a place with a good working environment. In addition, since the pressure pipe is lightweight, it can be supported from the tuyere work floor like normal piping, so there is no need to erect a support near the mud gun where the work space is limited. It does not interfere with other work.

Further, the mud feeding device of Honkomei includes a mud container that stores the molded mud, a pressure feeding device that pumps the mud by a slider that moves within the pressure feeding pipe using civil gas, and the mud container. Since it is equipped with a mud cutting device that receives the mud and guides the mud to the pressure feeding device, the method of the present invention described above can be carried out reliably. Because of the pressure-feeding, the diameter of the pressure-feeding pipe can be made sufficiently larger than the outer diameter of the molded mud, which prevents clogging in the pipe due to deformation of the molded mud, and also prevents the pressurized gas from clogging at that time. leakage can be minimized, and
The inside of the pipe has also been cleaned, making it possible to use it for a long time.
Further, in cutting out the mud, the mud cutting device mechanically guides the formed mud from the mud container to the pressure feeding device, so there is no need for complicated computer control, and the cost is low.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the device of the present invention, FIG. 2 is a partially cutaway enlarged front view of the pumping device of FIG. 1,
3 is an enlarged sectional front view showing the relationship between the gate and the pressure pipe in FIG. 1, and FIG. 4 is an enlarged sectional view taken along the cutting line A-A in FIG. 3. FIG. 5 is an enlarged sectional view taken along section line BB in FIG. 1. 1...Mud gun, 2...Mud inlet. 3... Tuyere work floor, 4... Mud cutting device, 5...
... Mud container, 6... Gate, 7... Pressure feeding device, 8... Tip pipe, 9... Pressure feeding pipe, 10...
・Valve, 11... Support, 25... Slider, 2
4... Molded mud, 27... Pressure gas. Figure 2

Claims (1)

[Claims] 1. The molded mud is stored in a mud container, and a pressure pipe for transferring the mud is provided in at least a section of a mud charging path between the mud container and the mud gun. A method for introducing mud, characterized by feeding the mud under pressure with gas. 2. A mud container that stores the molded mud, a pressure-feeding device that pumps the mud by a slider that moves in a pressure-feeding pipe using pressurized gas, and a device that receives the mud container and pumps the mud. A mud feeding device characterized by comprising a mud cutting device that guides the mud into the device.