DE2133810A1 - Clay cannon for plugging the tap holes of a furnace - Google Patents

Description

Dr. Ing. E. BERKENFELD · Dipl.-Ing. H. BERKENFELD, patent attorneys, Cologne Attachment file number

m June 29, 1971 vA // Named. Note Andcö Incorporated

Clay cannon for plugging the tap holes of a furnace.

The invention relates to clay or mud cannons that are particularly suitable for clogging the tap holes of metallurgical furnaces.

It is known to make clay or mud guns to clog the \ tap holes of metallurgical furnaces use molten to flow metal or molten slag from them to a halt. The cannon is generally provided with a cylinder * containing a piston for forcing the clay through a nozzle against the hot flowing metal into the tap hole, the metal heating the clay and thereby forming a solid plug in the furnace wall. The clay cannon is generally pivoted by a crane or other equivalent device to locate the cannon in the tap hole in use and to move the cannon when not in use out of the way to permit other operations in connection with the furnace. The tonka-Ij none is usually filled with clay which is inserted into an opening in the upper end of the cylinder, whereupon the opening can be closed by a hinged closure plate. The known clay cannons were designed to handle the relatively wet, plastic, easily squeezable materials that were previously used. They have certain disadvantages when used with today's clay materials, which have a drier, stiffer consistency that requires greater force to force the clay material out through the nozzle. The clay also tends to stick in the cannon, which requires frequent and tedious cleaning operations.

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Sometimes parts of the clay material leak past the piston into the Driving device of the piston, which causes considerable stress and wear on this driving device, so that the life of the cannon is reduced.

It is therefore an object of the invention to provide an improved clay cannon and an assembly of clay containing Bullet cases to avoid the disadvantages mentioned above

Another object of the invention is to provide a cannon with a cylinder, the design of which facilitates the filling of the bullet cases therein and also the cleaning of the cannon.
W. -

An embodiment of the clay cannon according to the invention is characterized through a cannon barrel or cylinder made up of a pair of complementary half sections of which one is pivotable to open and close the cylinder. A shell containing clay is inserted into the opened cylinder inserted and aligned with the cylinder piston coaxially, so that in operation with the cylinder closed, the piston turns off the sound the bullet casing pushes out without it touching the cylinder wall. After use, the empty bullet case is removed, the cylinder of any adherent or accumulated Sound remains free.

The invention therefore relates to a clay cannon having a cylinder composed of a pair of complementary half sections of one of which is pivotable to open and close the cylinder. A shell containing clay is inserted into the opened Cylinder inserted and coaxially aligned with the cylinder piston. The projectile casing has at one end a plug which comes into engagement with the piston to remove the material from the To push out the bullet case.

Further objects, features and advantages of the invention emerge from the following detailed description of an exemplary

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show embodiment thereof with reference to the drawings, In the figures, the same parts are denoted by the same reference numerals.

In the drawings shows:

Fig. 1 is a side view of a clay cannon according to the invention in the operating position relative to a furnace and a tapping channel, which are shown in section,

Fig. 2 is a plan view of the device according to FIG. 1, the illustrates the furnace in cross section,

3 shows a plan view on a larger scale, partly in section, which shows the cannon in the open position at the filling station,

4 shows, on a larger scale, a cross section along the line 4 4 of FIG. 3, showing the projectile case feed device illustrates

Figure 5 is a vertical cross-section of the clay cannon in the closed position in which it contains a clay Bullet casing surrounds and encloses,

Fig. 6 is a bottom plan view of the clay cannon, seen in the direction the arrows 6-6 of FIG. 5,

7 shows a horizontal longitudinal section along the line 7-7 of Fig. 6 and

Figure 8 is a perspective view of a clay containing projectile case according to the invention «

In Fig. 1 is a trained according to the invention clay cannon shown, which is generally designated 10 and by means of the pivot pin 14 on a holder 12 for the purpose of pivoting about a

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ne horizontal axis is arranged. The holder 12 is on a Carriage 16 is rotatably arranged for rotation in a generally horizontal plane about a generally vertical one Shaft 18 (Fig. 3). The carriage 16 is provided at the upper end with rollers 20 which run on guide rails 22 which are attached to. Beams 23 are suspended by means of beams 24. The cannon 10 can therefore along the rails 22 between an effective operating position, which is shown in Fig. 1 in full lines, and one Non-use position to be moved at a filling station, which is shown in Fig. 1 with broken lines.

The cannon 10 can introduce clay material into a tap hole 25 of a metallurgical male furnace 26 to control the flow of molten metal from the same in the tapping channel 28 to a standstill, which receives the emerging molten metal and the same promotes to a remote collection point. Of course, a plurality of tapping channels 28 can be provided, which lead to different collection points.

The cannon 10 has a barrel or cylinder 30 made of complementary consists of upper and lower half sections 32 and 34, which have a substantially semicircular trough shape in cross section (Fig. 4) and which in the closed state if they rest against one another, enclose and form a cylindrical bore receiving material, as shown in FIG. 5. This out The split section construction of the cylinder 30 is an important feature of the invention which is quick and easy effective filling of the clay-containing projectile cases into the barrel 30 allows, as well as the easy removal of the empty bullet cases from the same as will be described below.

Section 32 "is on one longitudinal edge with a pair of in the longitudinally spaced lugs 36 provided, the between ... ^ ^^^

protruding from the other ^ section-34? ^; ; Everyone who. Lugs are provided with aligned openings for receiving in front of pegs 42. Section 32 is therefore designed to move into the open and open ends

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Closing position pivotably arranged. The other long edge of the Section 32 is provided with longitudinally spaced-apart lugs 44 that lie between pairs of lugs 46 and 48 which protrude from section 34 are arranged. Each of the approaches is provided with openings for receiving bolts 50 (FIGS. 5 and 6) which are screwed into threaded bores in the lugs 46 to releasably connect the sections 32 and 34 together connect to. The sections 32 and 34 have complementary beveled edges, as at 51, 51 'in FIGS. 4 and 5 is shown to ensure a tight connection therebetween. An eyebolt 52 is on the outside of the section 32 arranged to facilitate opening and closing of the same. G

A conical nozzle 54 is on the front by some means End of the cylinder 30 attached. The bore of the nozzle 54 is provided with a shoulder 56, the purpose of which is described below will. The rear end of the cylinder 30 terminates in an annular one Flange 58 at the front end of a housing 60 through corresponding fastening means 62 is attached.

The cylinder 30 includes a piston 64 connected to a threaded piston rod 66 which extends rearwardly into the housing 60 and is operable to drive means _{m (not shown) located in the housing 60}

■ m is connected. The means for moving the piston rod 66 to and fro may be of conventional type and in and of itself does not form part of the invention. Reference can be made to American patents 1,852,560, 1,852,562 and 1,881,479 which describe various drive mechanisms which can be used in accordance with the invention to impart reciprocating axial movement to piston 64 while rotating the same relative to the cylinder 30 is prevented. A motor 68 (FIG. 1), which is connected to a power source (not shown), is arranged on the housing 60 in order to drive the drive device in a corresponding manner to give the piston 64 a reciprocating movement

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granted.

An essential feature of the invention is the use of clay materials that are enclosed in projectile cases, which are generally designated 70 and which are introduced individually into the cylinder 30 at a filling station 72. The bullet sleeve 70 consists of a hollow cylindrical container 74, the outer diameter of which is slightly smaller than the inner diameter of the cylinder 30 to feed the projectile case to facilitate gravity in the gun barrel. The container 74 is closed at the front end by an end wall 76, which has an outwardly bent, curved peripheral flange sealingly around an annular Bead 78 is rolled, which is a continuation of the container. forms and is arranged at the front end of the same. The other The end of the container 74 is closed by a cup-shaped plug 80 which has a circular end wall 82 and a cylindrical Has side wall 84. The outer diameter of the side wall 84 is dimensioned to be accurate fits in the container 74 in sealing engagement therewith, while the inner diameter of the side wall 84 is slightly larger than the outer diameter of the piston 64 in order to be able to accommodate the same.

^ The container 74 with the end wall 76 is preferably made of one - made cheap, impermeable paper or cardboard material, such as · aluminized cardboard that comes with a Good quality plastic is wrapped, such as cellophane, to retain moisture within the clay material. The plug 80 is preferably formed of a lightweight, inexpensive metal, such as tin, for a proportionate size to form a rigid piston seal.

At the filling station 72 a device is provided to the insert successive bullet cases 70 individually into the cylinder 30. As FIG. 4 shows, this device consists of aμs a magazine that contains a pair of laterally spaced,

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has inclined guide rails 86, which the stacked bullet cases Support 70. A pair of spaced apart retaining devices, indicated generally at 88, are disposed on the rail 86 around the two lowermost projectile cases 70 and release them independently, as described below. The others are stacked Projectile casings 70 merely rest against the adjacent lower projectile casings and are longitudinally under the action of gravity the rails 86 supplied. Each rail 86 is provided at the lower end with a shoulder 87 with the beveled edge 51 of the section 34 comes into engagement and covers the same when the cannon 10 is at the filling station 72.

Each holding device 88 comprises a pawl 90 which has an arcuate f shaped recess 92, which the circumferential shape of the projectile case 70 is adapted, and which is arranged pivotably on the rail 86 by means of a pin 94. An operating lever 96, having a cam surface 98 which engages the underside of the pawl 90, is rigid on a rotatable shaft 100 attached for pivotal movement into and out of engagement with the pawl. On the shaft 100 is a gear segment 102 arranged, which is in engagement with a drive gear 104 which is mounted on a shaft 106, which in a bracket 108 directed downward from the rail 86 is rotatably mounted. The shafts 106 are driven by appropriate drive devices driven, such as electric motors (not shown), connected by cables 112 to a control panel 110 are connected. Each holding device has three Control buttons 114, 116 and 118 are provided to selectively select the associated Release pawl in order to keep the same in the release position or the associated pawl in the closed position to move. "." ·. "..

As shown schematically in FIG. 2, the control panel 110 is connected to the cannon 10 by 'a cable i'iB _t / 117 "and the' connection point 119. The control panel also contains control buttons; 120, 122, 124 and 126 to operate the motors 68, 128, 130

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and 132 to the movement of the piston 64, the angular adjustment of the cannon 10 about the pivot 14, the pivoting movement of the holder 12 relative to slide 16 or to control the movement of slide 16 on rails 22. Motors 128, 130 and 132 are shown schematically in FIG. Because the special Motor and gear assemblies for performing the above movements may be of the usual kind and not in themselves be part of the Forming the invention, a more detailed description of the same does not appear necessary.

When the device according to the invention is in operation, a projectile case is used. 70 is inserted into the open cylinder 30 of the cannon 10 at the filling station 72 by depressing the button 114 to rotate the lower right actuating lever 96 (FIG. 4) clockwise to release the pawl 90 by the weight of the lowermost shell 70 will. After this has been done, the lever 96 is actuated by depressing the button 118 to move the pawl 90 to the original holding position. Then the left-hand holding device 88 is actuated to release its bullet case 70 onto the lower holding device in readiness for a later filling process and to pick up another bullet case 70 from the stack. A worker at the filling station checks to ensure that the shell 70 is properly positioned within the section 34 with the bead 78 against the shoulder 56. The worker then closes section 32 around the sabot and secures sections 32 and 34 together with bolts 50. In order to facilitate the pushing out of the clay material through the end wall 76, the worker can cut q transverse slots in the end wall 76, as shown at 77 in FIG. 8, before the lowermost pawl 90 ¥ is released. Alternatively, the slots 77 can be cut in the end wall 76 before the bullet sleeves 70 are attached to the rails 86. The carriage 16 is then moved along the rails 22 from the filling station 72 towards the tapping hole 25 in the furnace 26. The cannon 10 is then pivoted about the shaft 18 and the pivot pin 14 to the nozzle 54

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in the $ Absticnlöeh 25 to introduce.

Then the control button 120 is depressed to operate the motor 68 and the drive means in the housing 60, which gives the piston 64 a movement. As shown in FIG. 7, the piston 64 engages the plug 80 and moves the same against the nozzle 54 in order to force the clay material out of the projectile case 70. The pressure exerted by the clay material tears the end wall 76 (FIG. 7) on which parts against the. . · .. '· inner wall of the nozzle 54 are pressed. The container 74 of the projectile case 70 fits tightly into the cannon barrel and is prevented from being torn open by the thick wall of the barrel 30 and thereby kept in fact. That from the nozzle 54 into the tap hole | The escaping clay material engages and is heated by the hot flowing metal to form a solid plug in the furnace wall which stops the flow of molten metal that a plurality of tap holes in the furnace 26 one after the other ^; other can be plugged by the cannon 10 as required.

After the clogging process, the cannon 10 is moved along the rails 22 into the unloading position, which is shown in FIG. 1 with broken lines and on the left-hand side of FIG. The bolts 50 are removed and the section 32 is pivoted into the open position in order to remove the empty projectile case 70 and to clean the cannon 10. By using previously filled bullet cases, the; The barrel or barrel 30 of the cannon 10 is kept clean and it is only necessary to remove the nozzle and any remaining heated material adhering to its inside. The inner 'bore, the; nozzle 54 can also be through the; from the hinged off _; ■ _-,: ^ cut. 32 opening formed in the cylinder 30 are made accessible, whereby the cleaning process is facilitated. ; After the cannon 10 has been cleaned, the same is done around the vertical. The shaft 18 is pivoted into the filling position, which is shown in FIG.

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len lines

can be. It should be noted that the bullet cases 70 are bulky .and manual "" difficult; are to be handled. A "typical bullet case For example, it encloses a space vdri approximately 0.25 m and the preferred clay material weighs approximately 3,204 kg / m, so that the filled bullet case weighs approximately 815.4 k ^.

This specific weight and volume are, only for example ^: given and bullet sleeves, riVvön-different sizes, the hiedene pichjten- ^ f ^

different pichjten- ^ f ^
used depending. after egg special Αήντβηαμηέ. Of course, the size of the cylinder 30 and the piston 64 is changed accordingly. The bullet cases 70 are fed to the guide rails 86 by any suitable loading device. . ■ '■ - .. V'": - ■ -

From the above it can be seen that the objects of the invention can be fully achieved. As a result, the invention is one improved clay cannon provided the clay-containing projectile cases used to improve the tap holes in furnace walls and more effective way to clog. By use of the bullet cases, the filling and cleaning of the clay cannon can be carried out quickly and effectively. In addition, the sound material on a distant steep slope to be prepared for a to achieve more even and better resistance and the bullet case with a precisely measured. To nine nge to fill. By the arrangement "of a piston-like plug seal in the projectile case is the. Licking of clay material; into the cylinder and past the cylinder piston! excluded, so one. damage the drive device for the piston is avoided.

The ¹ invention ⁷ is ^r n'ibhi ^ äüf ^ die ^: 4ä% este! IiWi \ ind described, for example, execution form ^ b ^ execution

äMerungen ^ rf ihr-kaim ^ o ^ e ver

.-; ..; -. .'-_ ■; ' "-", - "'". P a. f ent a η s ρ r ü- che:,

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Claims (10)

Dr. Ing. E. BERKENFELD - Dipl.-Ing. H. BERKENFELD, patent attorneys, Cologne Attachment file number for the entry from 29 JUIli 1971 VA // Name d. Note AndCO PATENIA NS P R Ü C H E 1. Clay cannon with a cylinder and an outlet nozzle, which is connected to one end of the cylinder, characterized by a pair of split sections that have a bore therethrough of the cylinder when they are in engagement with each other, by means which arrange one of the sections relative to the other section for the purpose of pivoting movement in the open and Closed position, by means which releasably connect the sections to one another in the closed position, and by a piston arranged in the cylinder, which performs a reciprocating movement in the bore relative to the cylinder. 2. clay cannon according to claim 1, characterized by a projectile case for the material to be distributed, which is arranged in the cylinder and consists of a cylindrical container, coaxially aligned with the piston, the container having a frangible end wall at one end. 3 «clay cannon according to claim 2, characterized in that the bullet casing contains a movable, bowl-shaped plug, which is located in the other end of the container and which comes into engagement with the piston to remove the material from the projectile casing through the end wall and the nozzle *. 4. clay cannon according to claim 3, characterized in that the plug has a side wall which is connected to the inner wall the bullet case is in sealing engagement. "· ' 5. clay cannon according to claim 2, characterized in that ^A ^ ^0/4 209818/0532 the container is formed from impermeable paper material. 6. clay cannon according to claim 2, characterized in that the end wall is provided with incisions so that the same through the on the other hand, the pressure exerted and transmitted through the material in the bullet casing is easily torn. 7.0 clay cannon according to claim 2, characterized by a device, which fed the shell casings containing the material to the cylinder S. clay cannon according to claim 7 »characterized in that the feed device consists of a magazine for stacking the projectile cases is under the action of gravity that devices detachably hold the projectile cases in the magazine and that one Device releases the lowest projectile case into the cylinder when the same is opened. 9. Method of filling a clay cannon with a predetermined one Quantity and quality of the sound material, characterized in that a clay cannon has a generally cylindrical barrel extending through between the open and closed positions relatively movable sections is limited, as well as one Exhaust nozzle adjacent one end of the barrel and a drive piston adjacent the opposite end thereof, that the predetermined amount of clay material of the predetermined Quality is packaged in a case of such a size that it fills the barrel of the cannon that the case is closed at one end by a tearable end wall and at the opposite end by a plug which is passed through the sabot is movable in sealing engagement therewith that the sabot is inserted into the barrel when it is in the open position with the plug adjoining the piston and the frangible end wall adjoining the nozzle, and that the barrel is closed. - 10. Bullet case for a clay cannon, thereby p / I t im;: calibrates, U if V ι 8/0 h A / BAD ORISiNAL that the bullet casing consists of a cylindrical container, which is filled with clay material and which has such a size that the same fills the barrel of a clay cannon that a generally planar frangible end wall at one end of the container and a movable plug at the opposite end of the container and that the plug has a side wall having,. which is in sealing engagement with the container when the plug is moved therethrough. s d / 0532 Lee. rs e it e