JP2012188712A - Device for moving blast furnace main trough cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for moving a blast furnace main trough cover, which can secure the safety of an inspection/maintenance worker of a main trough at either of tap holes, in the blast furnace main trough cover moving device which is commonly used in front of the two adjacent tap holes.SOLUTION: The device for moving a blast furnace main trough cover comprises: a turning post 9 which is horizontally and rotatably held by a turning drive unit 10b; and an arm 11 which is vertically movably held by an ascending/descending drive unit 10a, has a pivot for supporting vertical movement generated by an ascending/descending drive receiving part of the ascending/descending drive unit and ascending/descending drive at a turning post side, has a hanging part 12 for hanging up the main trough at the end at a side opposite to the turning post, and has a stopper device (constituted of a stopper 15, a hydraulic cylinder 14 and a receiver 16) for limiting the moving range of the main trough cover moving device. It is preferable that the stopper device may be accommodated in the main trough cover moving device.

Description

  The present invention relates to a blast furnace main casing cover moving device for attaching or removing a main casing cover to a main casing before a blast furnace outlet. More specifically, in the case where the device is shared by two main doors adjacent to each other, when the opening / closing operation is performed at one of the outlets, A blast furnace main cover moving device that can easily and reliably ensure the safety of the main inspection and repair worker at the other outlet when moving the main cover attached to the previous main cover to the standby position .

  The blast furnace operation process is a process for producing pig iron as a product in a molten state. In this process, molten pig iron (hereinafter referred to as “hot metal”) and molten slag (hereinafter referred to as “hot metal”) are discharged from the outlet at the bottom of the furnace (hereinafter referred to as “hot iron”). ) Hot metal and hot metal are also referred to as “hot metal”.

  When the blast furnace is discharged, hot iron (about 1500 ° C) flows from the main outlet through the main iron. Therefore, as a heat-preventing measure against radiant heat and the prevention of scattering of high-temperature hot metal to surrounding equipment and workers, It is essential to cover the main cover. The range where the main cover is required is in the vicinity of the exit (generally, about 8 m from the exit to the downstream of the main entrance). Hereinafter, the position in the vicinity of the outlet where the main cover is installed is referred to as “main position before the outlet” or simply “position before the outlet”.

  The main cover is installed at the position before the spout opening that is within the operating range of the cast floor equipment such as the punching machine that performs the spout opening and the mud gun that closes the spout. In order to avoid interference with the cast floor equipment when the fence is closed, the main cover is retracted so as not to interfere with the movement to the predetermined standby position or the position before the exit of the cast floor equipment (hereinafter also referred to as the retract position). Including the “standby position”).

  In other words, the main cover is in the standby position when there is no output, but the hole opening machine moves to the position before the output port on the main window for the output opening, and opens the output port. After retreating, the main cover is installed at the main position before the outlet in preparation for output. During output, the main cover is continuously installed at the position before the output on the main cover. When the output is closed, the main cover is moved from the position before the output port to the standby position, and then the mud gun is moved to the position before the output port on the main output to close the output port. .

  In the blast furnace main cover moving device, a function of moving the main shaft cover of 10t to 30t class between the position in front of the outlet and the standby position is required by a swing type or horizontal movement type. The

  Such movement of the blast furnace main cover has been carried out manually by using a jib crane or hoist crane arranged near the dock. However, in recent years, in order to improve work efficiency and work environment, the main cover is moved by remote operation and is automated.

  On the other hand, two to five blast furnace outlets are usually installed for one blast furnace, and depending on the layout of the casting floor, the outlets may be arranged close to each other. In such a case, an attempt has been made to share the main cover moving device between two adjacent outlets because of space constraints and cost advantages.

  For example, Patent Document 1 discloses a swivel strut that is disposed between two adjacent tap holes and that is rotatably supported in a horizontal direction, and a swivel boom that can be vertically moved along the swivel strut. , A blast furnace tread cover moving device for a blast furnace outlet having a moving device mounted on the swivel boom and movable in the length direction of the swivel boom and a dredging cover suspension supported by the moving device is disclosed. ing. According to this saddle cover moving device, the entire device can be made compact and simple, the work space near the spout can be widened, workability is improved, and safer work is possible. It is said.

  In addition, Patent Document 2 discloses a large eaves cover attaching / detaching device in which a revolving frame is attached to a support provided on a cast floor work floor, and a horizontally rotatable base is attached to a tip end of the frame. Is described. According to this apparatus, the large bag cover can be automatically moved from the mounting position to the retracted position, and labor saving and a significant improvement of the working environment can be achieved.

  Patent Document 3 includes a main frame that suspends a hot metal cover for hot metal and pivots above an installation position and a retreat position of the hot metal upper part, and a lifting / lowering means for the large hot metal cover that is suspended from one end of the main frame. A cover crane having a mechanism capable of detecting stably the pressure of the pressurized gas that drives the lifting means to detect that the large bag cover is in the winding or unwinding stop position is described.

  Patent Document 4 describes a main cover cover attachment / detachment device using a one-point suspension crane that turns and travels with a support column installed in the vicinity of a blast furnace tapping. According to this apparatus, the attaching / detaching work can be performed more efficiently with safety, economy and labor saving.

  According to the techniques described in these Patent Documents 1 to 4, the main cover is moved remotely or automatically before the tap opening to improve work efficiency, work environment improvement, or safety of the cover cover attachment / detachment work. It is said that it can be secured. In particular, the saddle cover moving device described in Patent Document 1 is a device that is shared by the main fence before the two outlets, and according to this device, the entire device can be made compact, simplified, It is stated that it is possible to improve safety and to carry out safer work.

  However, in these patent documents, a specific explanation about ensuring work safety is not made. At the blast furnace exit and main entrance, people enter the main entrance before the exit, and refractory inspection and repair work are regularly performed. In that case, the safety of the inspection / repair operator may not always be sufficiently secured due to an erroneous operation or malfunction of the heel cover moving device. As will be described in detail later, in particular, in the cover moving device shared by the main ship before the two outlets, it is necessary to ensure the safety of inspection and repair workers. There are no examples of technical measures taken from.

Japanese Patent Laid-Open No. 10-317026 JP 7-278630 A JP-A-2005-187200 Japanese Patent Laid-Open No. 10-60513

  Refractory inspection work is required periodically (once / day) at the blast furnace outlet and main pole, and once a week at the outlet and once or twice a month at the main pole. Is done. When performing such inspections and repair work, it is necessary for a person to enter the work before the exit.

  In the case of a stand-alone type cover moving device that installs one main cover moving machine for one outlet, the power source of the cover moving device (power source for motor drive, hydraulic pump or hydraulic pressure for hydraulic pressure) Stopping or closing the piping valve) causes the main cover moving device to move to the position before the outlet (pre-exit position where inspection or repair work is being performed) due to an erroneous operation or malfunction. Can be prevented.

  However, in the case of a shared installation type cover moving device that shares a single cover moving device for two outlets, one of the outlets repeats the opening and closing of the output, the output and the closing of the output. At the other outlet, there is a case where refractory inspection and repair work is performed in the main door before the aforementioned outlet.

  In this case, it is necessary to move the main cover from the position before the output port to the standby position every time the output port is opened or closed at one output port. Can not be cut off. For this reason, in a conventional shared installation type cover mobile device, when a person operates, the main cover of one outlet is visually checked by a person with the other outlet (that is, a refractory within the main door). The door is not moved to the outlet where the inspection and repair work is being carried out. In remote automatic operation, the main cover is moved by the electric control based on the position information from the limit switch and the sensor (encoder, etc.) that grasps the turning position. The main cover is prevented from moving in the direction of the other outlet that is being inspected and repaired.

  However, in the case of operation by a person, there is a possibility of erroneous operation. In the case of remote automatic operation, the main cover may move in the direction of the outlet that is being inspected and repaired due to a sensor failure, and the safety of the operator is not necessarily ensured. Therefore, when moving the main cover to open or close the opening at one outlet, the worker who is carrying out the inspection and repair work at the position before the other outlet stops and evacuates temporarily. Inevitably, the inspection and repair work cannot be performed efficiently.

  In recent years, in particular, safety of machine equipment is required worldwide, and a method for performing machine risk assessment and verifying the safety of equipment is defined in ISO12001. The basic idea is to take equipment measures to reduce the risk with respect to the high level of risk and attach importance to failsafe.

In the shared installation type cover moving device arranged between the above two blast furnace mains, the risk to inspection and repair personnel is in a high risk (ie, dangerous) state from the points 1) and 2) below. Therefore, equipment measures to reduce this high risk are required.
1) The work should be performed in the vicinity of a heavy object (claw cover) moving device.
2) Safety measures depend only on the reliability of stopping by electric control system such as interlock by sensor (stopping movement of main cover in the direction of the outlet during inspection and repair).

  In the conventional shared installation type cover moving device, priority is given to remote operation, automation, work efficiency, etc., and only the mechanical structure related to the movement of the cover is prioritized, and equipment measures to ensure the safety of inspection and repair workers There was no idea of taking.

  In the shared installation type cover moving device, the main cover attached to the main bar in front of the tap hole is moved to the standby position when the tap hole opening operation or the closing operation is performed at one of the tap holes. It is an object of the present invention to provide a blast furnace main cover moving device that can ensure the safety of a main inspection / repair operator at the other outlet by a simple facility measure.

  In order to solve the above-mentioned problems, the present inventors have studied based on the idea of attaching a safety device (stopper) that mechanically limits the operation range to the moving device of the main cover. As a result, a stopper that moves forward or backward is attached to the base hardware of the shared main cover cover moving device, and a "reception (a part that receives the action of the stopper)" is provided on the swivel post that is rotatably held on the base hardware. Thus, it was confirmed that the swivel range of the swivel post (in other words, the operating range of the main cover moving device) can be limited.

  That is, by moving a stopper (for example, a rod-like body that stops the movement of the swivel post) on the swivel track of the swivel post, when the stopper hits the receiver provided on the swivel post, The operation range of the main cover moving device can be adjusted by appropriately setting the installation position of the receiver and the installation position of the stopper. Thereby, when it is judged that it is dangerous from the safety | security aspect of the inspection / repair work of the refractory in the main shaft, the operation range of the main cover moving device can be limited as necessary.

  The present invention has been made based on such examination results, and the gist thereof is the following blast furnace main cover moving apparatus.

  That is, a blast furnace main cover that is a device for attaching or removing a main cover to or from a main pole before the blast furnace outlet, and is shared by two adjacent main outlets before the outlet. In the main cover moving apparatus, which has a drive mechanism capable of moving up and down the main cover and having a drive mechanism that can move horizontally in front of the two outlets adjacent to each other. A blast furnace main cover moving device comprising a stopper device that limits the operating range of the horizontal movement.

In the blast furnace main cover moving apparatus according to the present invention, the foundation disposed on the casting bed between the two tap holes adjacent to each other as a raising / lowering drive mechanism capable of moving the main cover up and down and a drive mechanism capable of moving horizontally. It is supported on a hardware by a swivel post held by a swivel drive device so as to be rotatable in a horizontal direction via a sliding part, and supported by a lift drive device attached to the lower part of the swivel post so as to be movable up and down. An elevating drive receiving portion of the elevating drive device on the post side and a fulcrum that supports vertical movement by the elevating drive, and an arm having a suspension portion for lifting the main cover at the end opposite to the turning post And, as the stopper device, between a main rod position before one of the two outlets and a main cover cover standby position between the two adjacent outlets. The behavior of Embodiments and further comprising a stopper device for restricting the operating range of the main runner cover mobile device to become possible is desirable.
Here, the “stopper device” has a stopper (for example, a rod-like body) and a receiver, and normally the stopper post is used to further stop the operation of the swing post (and hence the operation of the main cover moving device). A drive device is provided for moving forward or backward on the turning trajectory.

  In the blast furnace main cover moving apparatus according to the present invention, it is desirable that the stopper device is provided with an electric, hydraulic or pneumatic stopper driving device and can be operated by remote operation.

  It is desirable that the stopper device provided with the electric, hydraulic or pneumatic driving device is built in the main cover moving device.

  In the blast furnace main cover moving apparatus according to the present invention, the stopper device preferably includes a shock absorbing mechanism.

  The blast furnace main casing cover moving apparatus of the present invention is an apparatus shared by two main terminals in front of two outlets adjacent to each other. According to the main cover moving device, the main cover attached to the main bar before the outlet is moved to the standby position in accordance with the opening or closing of the outlet at one outlet. Sometimes, it is possible to simply and reliably ensure the safety of the main inspection and repair worker at the other outlet.

  In addition, since the safety of the inspection / repair operator is ensured, when the main cover is moved to the standby position, the worker who is performing the inspection / repair work at the position before the other outlet stops and evacuates. This eliminates the need for efficient inspection and repair work.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the external appearance of the blast furnace main casing cover moving apparatus of this invention, and the state of the vicinity of the blast furnace outlet where this apparatus is arrange | positioned, (a) is the state by which the main casing cover is put in the main casing cover standby position (B) is the state in which the main cover is installed at the main position before the spout. It is a side view (a part is displayed with a longitudinal section) which shows an example of schematic structure of a blast furnace main cover moving device of the present invention. FIG. 3 is a partial external view of a stopper device provided in the blast furnace main cover moving device of the present invention, and is a view illustrating a stopper device having an impact absorbing function. It is a figure explaining the action | operation of the stopper apparatus which the blast furnace main shaft cover moving apparatus of this invention comprises, and the operation | movement range (operation range to one main hook direction) of the main main cover moving apparatus. It is a figure explaining the action | operation of the stopper apparatus which the blast furnace main shaft cover moving apparatus of this invention comprises, and the operation range (operation range to the other main rod direction) of the main rod cover moving apparatus. It is a figure which shows typically the arrangement of the stopper in the blast furnace main cover cover moving device of the present invention.

As described above, the blast furnace main cover moving apparatus of the present invention is an apparatus for attaching or removing the main cover to the main pole before the blast furnace outlet, and before the two adjacent outlets. It is assumed that it will be shared by the presiding officers. This apparatus has a vertical drive mechanism capable of moving the main cover up and down, and a main cover moving apparatus having a drive mechanism capable of horizontal movement in front of two main entrances adjacent to each other. A stopper device is provided to limit the movement range of movement.
That is, the greatest feature of the blast furnace main cover moving device of the present invention is that the operating range is mechanically limited to the main cover moving device from the viewpoint of ensuring the safety of workers by simple equipment measures. The safety device (stopper) is attached.

  As a raising / lowering drive mechanism capable of moving the main rod cover up and down and a drive mechanism capable of horizontal movement, on a base hardware arranged on a casting floor between two tap holes adjacent to each other, via a sliding portion, A swivel post that is rotatably supported by a swivel drive device and a lift drive device that is attached to the lower part of the swivel post so that it can move up and down. And a fulcrum that supports the vertical movement by the lift drive, and an arm having a suspension part for lifting the main cover at the end opposite to the turning post, and further as the stopper device , So that only the operation between the main anchor position before one of the two outlets and the main cover cover standby position between the two adjacent outlets is possible. The main cover If the device is provided with a stopper device that limits the operating range of the moving device, when the main cover attached to the main shaft before one of the outlets is moved to the standby position, the main at the other outlet It is desirable to ensure the safety of the workers who check and repair firewood by simply attaching a stopper device.

  FIG. 1 is an explanatory view showing the appearance of the blast furnace main cover moving device of the present invention and the state in the vicinity of the blast furnace outlet where the device is arranged. FIG. 1 (a) shows the main cover in the main cover cover standby position. (B) is a state in which the main cover is installed at the main position before the outlet. FIG. 2 is a side view (partially shown in a vertical section) showing a schematic configuration example of the blast furnace main casing cover moving device of the present invention having the above-mentioned desirable configuration.

  As shown in FIGS. 1A and 1B, the main cover moving device 1 according to the present invention has a main cover 5 attached to the main bars 4a and 4b in front of the tap port 3 of the blast furnace body 2. A device for attaching or removing. This device is disposed on the casting floor 6 between two tap holes 3 adjacent to each other (however, the tap port 3 corresponding to the main rod 4b is not shown). It is shared by the main fences 4a and 4b. In the example shown in the figure, the main fence 4a is used for the output, and the main cover 4b is used for the inspection and repair work.

  As shown in FIG. 2, the blast furnace main cover moving device is mounted on a base metal 7 arranged on a cast floor, and is attached to a lower part of the swivel post 9 held via a sliding part 8. And an arm 11 supported so as to be movable up and down by the lift drive device 10a. The “swivel post 9” referred to here is connected to a swivel post body 9a that can be rotated in the horizontal direction by a swivel drive device 10b, and is a fixed portion (in FIG. 2) that performs the same motion as the swivel motion of the swivel post body 9a. In the example, it is assumed that the mantle portion 9b) is also included.

  As the elevating drive device 10a and the turning drive device 10b, a hydraulic drive device is generally used.

  The sliding portion 8 is a device having a turning portion in which the sliding portion such as a turning post operates smoothly by a bearing type bearing or the like, and may be configured by a conventionally used one.

  The arm 11 is provided with a lift drive receiving portion of the lift drive device 10a and a fulcrum supporting vertical movement by the lift drive on the revolving post 9 side, and a blast furnace main cover 5 (see FIG. 1) is lifted at the other end. The suspension part 12 is provided.

  The main rod cover moving device of the present invention further includes a main rod cover 5 in front of one of the two adjacent tap holes (that is, as shown in FIG. 1B). The main fence cover 5 is placed as shown in Fig. 1 (a). A stopper device is provided to limit the operating range of the main cover moving device so that only the operation between the positions indicated by the broken line) is possible.

  The stopper device for the blast furnace main cover moving apparatus illustrated in FIG. 2 includes a stopper 15 that moves forward or backward in a cylinder 17 fixed to the base metal piece 7, a receiver 16 that is fixed to the turning post 9, and a stopper 15. The hydraulic cylinder 14 is fixed to the base metal 7 as a drive source for moving forward or backward. In FIG. 2, the stopper device on the side marked with an arrow a is a state in which the stopper 15 is advanced in the direction of the arrow a so as to protrude from the outer periphery of the cylinder 17 so that the stopper 15 comes into contact with the receiver 16. Then, the turning of the turning post 9 is stopped. On the other hand, the stopper device on the side marked with the arrow b is in a state in which the stopper 15 is retracted in the direction of the arrow b so that the stopper 15 does not hit the receiver 16.

  The stopper device illustrated in FIG. 2 is an example in which the stopper device is built in the main cover moving device, but the stopper device may be installed outside the main cover moving device.

  The stopper device can also be manually set (setting whether the stopper is advanced or retracted). However, the main cover is about 10t to 30t, and it is necessary to make the stopper have sufficient strength that does not break even if this heavy object abuts against the stopper. For this reason, the stopper is also several tens of kg or more, and in some cases, the weight is over 100 kg. In addition, there are cases where the frequency of changing the outlet is high. For these reasons, it is desirable that the stopper device be provided with a drive device that is electrically or hydraulically or pneumatically, not manually operated.

  In addition, it is desirable that the stopper can be set by remote control in consideration of the safety of the operator who sets the stopper, the heat conditions in the vicinity of the main shaft before the exit.

  The vicinity of the spout is in a harsh atmosphere with a high temperature and a lot of dust. Furthermore, since the stopper device itself is also affected by the scattering of hot metal and radiant heat, the stopper device is mainly used as shown in FIG. It is desirable to incorporate it in the cover moving device. As a result, it is possible to prevent the direct influence of high temperature and dust atmosphere, and to reduce problems such as seizure, wear and corrosion of the drive unit, and to ensure stable operation.

  Further, as described above, since the stopper device needs to be stopped by the contact between the stopper and the receiver, the stopper device having a buffer capable of absorbing the shock should be used. Is more desirable.

  FIG. 3 is an external view of a part of the stopper device included in the blast furnace main cover moving device of the present invention, and is a view illustrating the stopper device having an impact absorbing function. This figure is an external view of the stopper device indicated by the arrow a shown in FIG. 2 as viewed obliquely from the upper right side of the drawing.

  That is, as described above, the stopper device includes the stopper 15 that moves forward or backward by a hydraulic cylinder (not shown) in the cylinder 17 fixed to the base metal 7 and the receiver 16 that is fixed to the turning post 9. Although configured, a hydraulic absorber 18 for absorbing shock is attached to the receiver 16. The hydraulic absorber 18 acts as a buffer that absorbs the impact when the receiver 16 moves in the direction of the white arrow as the turning post 9 turns and hits the stopper 15.

  The buffer is not limited to the hydraulic absorber illustrated in FIG. Any elastic material that can absorb any impact is acceptable, and a coil spring or the like can also be applied.

  When the blast furnace main casing cover moving device of the present invention is used, the operating range of the main casing cover moving device can be limited as necessary when the main shaft is adjacent to two main entrances adjacent to each other. Rather than relying solely on the restriction of the operating range of the main cover moving device by the electric control system using the sensor (stopping the main cover movement in the direction of the outlet during inspection and repair) Therefore, it is possible to restrict the operation range and to take double safety measures, and to ensure the safety of the worker who is inspecting and repairing at the position before the exit. It is also a great advantage that a simple stopper device consisting of a stopper, a receiver and a stopper driving device need only be attached.

  The present invention will be specifically described below based on examples.

  The above-mentioned blast furnace main cover moving device of the present invention with the stopper device shared by the main boats in front of the two outlets adjacent to each other, the operating range of the main cover moving device, and the main inspection and repair work Confirmation of the safety of the workers.

  A hydraulic cylinder was used as the drive source for the stopper device, and it was built in the main cover moving device. Further, the hydraulic absorber illustrated in FIG. 3 was attached as a buffer to a receiver fixed to the swivel post. The operation of the stopper device and the operation range of the main cover moving device will be described below with reference to the drawings schematically showing the state of the blast furnace main cover moving device and the vicinity of the blast furnace outlet where the device is arranged. .

  FIG. 4 is a view for explaining the operation of the stopper device and the operation range of the main cover moving device (operation range in one main shaft direction). In the figure, for convenience of explanation, the hydraulic cylinder of the drive source is shown outside the main cover moving device.

  FIG. 4A shows a state where the main cover 5 is placed at the main cover cover standby position 13. The main rod cover moving apparatus 1 of the present invention is disposed between main rods 4a and 4b in front of the tap holes provided in the blast furnace body 2 and adjacent to each other. At two places (the main rod 4a side and the main rod 4b side) of the swivel post 9 of the main rod cover moving device 1, receivers provided with buffers 19a and 19b for absorbing shocks are attached.

  FIG. 4 (b) shows that the main rod 4a is out and the main rod 4b is being repaired, and the main cover 5 is moved from the standby position 13 by the main cover moving device 1 to the position before the main door 4a. It has moved to and represents the installed state. In this case, the stopper 15a is attached so that the stopper 15a abuts against the buffer 19a in a state where the main rod cover 5 is installed at the position before the outlet of the main rod 4a, and the stopper 15a is advanced by the hydraulic cylinder 14a. It is set to the state. Therefore, the operating range of the main rod cover moving apparatus 1 (the operating range in the direction indicated by the white arrow in the drawing) is limited to the position before the main door 4a.

  FIG. 4C shows a state in which the main rod cover 5 has been unloaded and the main rod cover 5 has been moved from the main rod position before the unloading port to the standby position 13 by the main rod cover moving device 1. . The mainstay 4b is still under repair. In this case, when the main cover 5 is moved to the standby position 13, the stopper 15b is attached so that the stopper 15b attached separately contacts the buffer 19b, and the stopper 15b is advanced by the hydraulic cylinder 14b. Is set. Therefore, the operating range of the main fence cover moving device 1 in the direction indicated by the white arrow is limited to the standby position 13 of the main fence cover 5.

  That is, the stopper device is attached to the position shown in FIG. 4 (b) and the position shown in FIG. 4 (c). By setting the stoppers 15a and 15b to advance so that the receivers come into contact with each other, the operating range of the main rod cover moving device 1 is extended from the standby position 13 of the main rod cover 5 to the position before the outlet of the main rod 4a. Can be limited within the range. As a result, the main cover 5 does not move in the direction of the main rod 4b being repaired, and the safety of the worker who is repairing the main rod 4b is ensured.

  In FIG. 4, the case where the main cover 5 is moved between the standby position 13 and the front position of the main cover 4a has been described. However, the main cover 5 is moved before the standby position 13 and the main position 4b. When moving between the positions, the operating range of the main cover moving device 1 can be limited by separately determining the attachment position of the stopper 15.

  FIG. 5 is a diagram for explaining the operation of the stopper device and the operation range of the main cover moving device (operation range in the other main guide direction).

  In FIG. 5 (a), in contrast to the case shown in FIG. 4 (b), the main rod 4b is out, the main rod 4a is in repair, and the main cover 5 is moved to the main cover moving device 1. This represents a state where the vehicle has been moved from the standby position 13 to the position before the exit of the main rod 4b. In this case, the stopper 15c is attached so that the buffer 19b abuts against the stopper 15c in a state where the main rod cover 5 is installed at the position before the outlet of the main rod 4b. Therefore, the operation range of the main rod cover moving apparatus 1 is limited to the position before the main door 4b.

  FIG. 5B shows a state where the main cover 4b has been unloaded and the main cover 5 has been moved from the front position of the main cover 4b to the standby position 13 by the main cover moving device 1. Yes. In this case, the stopper 15d is attached so that the buffer 19a contacts the stopper 15d in a state where the main cover 5 is moved to the standby position 13. Therefore, the operation range of the main fence cover moving device 1 is limited to the standby position 13 of the main fence cover 5.

  That is, in the blast furnace main cover moving device of the present invention, four stoppers and two receivers on the swivel post side are installed, and the setting of the stopper device (that is, the stopper device is set according to the main rod using the moving device (that is, The operation range of the main cover moving device can be adjusted by setting whether the stopper is moved forward or backward.

  FIG. 6 is a diagram schematically showing an example of the arrangement of the stopper device in the blast furnace main cover moving device of the present invention, which is shown in FIGS. 4 (b), 4 (c) and 5 (a), (b), respectively. It is the figure which showed together the stopper and hydraulic cylinder. In the blast furnace main cover moving apparatus of the present invention, these four stoppers 15a, 15b, 15c and 15d, and hydraulic cylinders 14a, 14b, 14c and 14d are attached.

  When the main rod cover moving device is used with the main rod 4a, the stoppers 15a and 15b are set in a state of being advanced by the hydraulic cylinders 14a and 14b, and the stoppers 15c and 15d are moved backward so as not to hit the receiving on the turning post side. By doing so, as shown in FIGS. 4B and 4C, the operating range of the main cover moving device is limited from the standby position of the main cover to the position before the exit of the main cover 4a. be able to.

  Further, when the moving device is used in the main shaft 4b, the stoppers 15c and 15d are set in the advanced state, and the stoppers 15a and 15b are moved backward, so that the state shown in FIGS. As shown, the operating range of the main rod cover moving device can be limited from the standby position of the main rod cover to the position before the exit of the main rod 4b.

  As a result of using the blast furnace main cover moving device of the present invention to which the above four stoppers are attached, setting the stopper appropriately, and causing the moving device to perform the operation described in FIG. 4 and FIG. It was confirmed that the stopper device functions as a safety device by operating within a predetermined range.

  The concept of the blast furnace main casing cover moving device of the present invention that the stopper device is attached is based on the conventional swivel type shared installation type cover moving device using the crane or the horizontal moving main cover cover moving device. It is also applicable to. Also, this concept can be applied to any type of soot cover moving device in order to prevent mutual interference with cast floor equipment such as a hole punch or a mud gun.

  The blast furnace main casing cover moving apparatus of the present invention is an apparatus shared by two main terminals in front of two outlets adjacent to each other. This apparatus can be effectively used in a process for producing pig iron in a molten state as a main cover moving apparatus that can ensure the safety of the main inspection and repair workers at the main entrance.

1: Main cover moving device, 2: Blast furnace body, 3: Outlet,
4a, 4b: main rod (during tapping), 5: blast furnace main rod cover, 6: cast floor 7: foundation hardware, 8: sliding part, 9: swivel post, 9a: swivel post body,
9b: mantle, 10a: lifting drive, 10b: turning drive, 11: arm,
12: suspension part, 13: main cover cover standby position, 14: hydraulic cylinder,
15: Stopper, 16: Receiving, 17: Cylindrical, 18: Hydraulic absorber,
19a, 19b: buffer

Claims (5)

A blast furnace main cover moving device that is used to attach or remove a main cover to a main pole before the blast furnace outlet and is shared by two main outlets adjacent to the outlet. Because
In a main cover moving apparatus having a drive mechanism capable of moving up and down the main cover and having a drive mechanism that can move horizontally in front of two main doors adjacent to each other, the operating range of the horizontal movement A blast furnace main cover moving device comprising a stopper device for restricting the blast furnace. As an elevating drive mechanism capable of moving the main cover up and down and a drive mechanism capable of moving horizontally,
A swivel post that is rotatably held in a horizontal direction by a swivel drive device on a base metal disposed on a casting floor between two tap holes adjacent to each other, through a sliding portion,
It is supported by a lifting drive attached to the lower part of the swivel post so that it can be moved up and down. An arm provided with a suspension part for lifting the main cover at the opposite end,
Further, as the stopper device, only the operation between the main cover position before one of the two outlets and the main cover cover standby position between the two adjacent outlets. The blast furnace main casing cover moving device according to claim 1, further comprising a stopper device that limits an operating range of the main casing cover moving device so as to be possible.   The blast furnace main casing cover moving device according to claim 2, wherein the stopper device includes an electric, hydraulic or pneumatic driving device and can be operated by remote operation.   The blast furnace main shell cover moving device according to claim 3, wherein a stopper device including the electric, hydraulic or pneumatic driving device is built in the main cover moving device.   The blast furnace main casing cover moving device according to any one of claims 2 to 4, wherein the stopper device includes a shock absorbing mechanism against impact.

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