CN115475948B - Molten steel flow guiding mechanism for atomizing molten steel to prepare powder - Google Patents
Molten steel flow guiding mechanism for atomizing molten steel to prepare powder Download PDFInfo
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- CN115475948B CN115475948B CN202211151192.7A CN202211151192A CN115475948B CN 115475948 B CN115475948 B CN 115475948B CN 202211151192 A CN202211151192 A CN 202211151192A CN 115475948 B CN115475948 B CN 115475948B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/088—Fluid nozzles, e.g. angle, distance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0888—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid casting construction of the melt process, apparatus, intermediate reservoir, e.g. tundish, devices for temperature control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0892—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid casting nozzle; controlling metal stream in or after the casting nozzle
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a molten steel flow guiding mechanism for atomizing molten steel to prepare powder, which comprises a smelting crucible and an atomizing crucible, wherein molten steel smelted by the smelting crucible is poured into the atomizing crucible, a first connecting component and a second connecting component are oppositely arranged on the side wall surface of the smelting crucible, a flow guiding plate is arranged at the top of the smelting crucible, the flow guiding plate is tightly supported between the first connecting component and the second connecting component, and the tops of the first connecting component and the second connecting component are tightly pressed on the top of the flow guiding plate. According to the invention, the first connecting components and the first connecting plates are arranged and installed on the two sides of the smelting crucible, so that the convenient and rapid installation and fixing of the guide plates are realized, the tightness degree between the guide plates is high after the guide plates are assembled in place, the guide plates are not easy to loosen, the sealing effect can be realized by using a small amount of fire clay, and the construction period for waiting for the fire clay to dry after the guide plates are assembled is shortened.
Description
Technical Field
The invention relates to the technical field of molten steel atomizing powder making equipment. In particular to a molten steel flow guiding mechanism for atomizing molten steel to prepare powder.
Background
When carrying out molten steel atomizing powder process, at first need smelt molten steel, then pour the molten steel into atomizing powder process mechanism in, when empting the molten steel, the runner can receive the erosion that the molten steel erodees, cause crucible runner department to damage, the piece of peeling can influence the purity degree of molten steel to the smelting speed of molten steel has certain difference, this can lead to the fluctuation appears in the interior molten steel degree of depth of crucible that is used for atomizing, receive the influence of molten steel pressure, liquid outlet department liquid velocity can appear changing, make the molten steel flow back with different speed contact jetting air current, cause the powder particle size distribution after the atomizing to have great difference.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide the molten steel flow guiding mechanism for atomizing and pulverizing molten steel, which can prolong the service life of the molten steel crucible and improve the quality of atomized powder.
In order to solve the technical problems, the invention provides the following technical scheme: the molten steel flow guiding mechanism for atomizing and pulverizing molten steel comprises a smelting crucible and an atomizing crucible, molten steel smelted by the smelting crucible is poured into the atomizing crucible, a first connecting component and a second connecting component are oppositely arranged on the side wall surface of the smelting crucible, a flow guiding plate is arranged at the top of the smelting crucible, the flow guiding plate is tightly supported between the first connecting component and the second connecting component, and the tops of the first connecting component and the second connecting component are tightly pressed on the top of the flow guiding plate; the bottom of the atomizing crucible is fixedly provided with an upper supporting plate, the lower part of the atomizing crucible is provided with a supporting plate, the top of the supporting plate is hinged with more than three first hinging rods along the circumferential direction of the supporting plate, the top end of each first hinging rod is supported on the bottom wall of the upper supporting plate, the middle part of each first hinging rod is hinged with a hydraulic balance component, the other end of each hydraulic balance component is hinged with the top of the supporting plate, the edge of the top of the supporting plate is hinged with a second hinging rod through a hinging seat, one end of each second hinging rod, which is close to the center of the supporting plate, is positioned under the first hinging rod, one end of each second hinging rod, which is far away from the center of the supporting plate, is fixedly provided with a balancing weight, a fixing component is in fluid conduction on the hydraulic balance component, the fixing component is mounted on the top of the supporting plate, and one end of each second hinging rod, which is close to the center of the supporting plate, is connected with the top of the supporting plate; install apart from the regulation and control subassembly in the backup pad, the top of apart from the regulation and control subassembly with the diapire fixed connection of upper bracket, install the gas spraying ring on the regulation and control subassembly apart from, the liquid outlet is equipped with to atomizing crucible's bottom, the liquid outlet inserts in the gas spraying ring.
Above-mentioned a molten steel guiding mechanism for molten steel atomizing powder process, first connecting hole and first spread groove have been seted up on the top terminal surface of smelting crucible, second connecting hole and second spread groove have been seted up on the bottom terminal surface of smelting crucible, first connecting hole with the position in second spread groove corresponds from top to bottom, first connecting groove with the position in second connecting hole corresponds from top to bottom, the outer wall upper portion and the lower part of smelting crucible respectively seted up with first connecting groove with the opening that the second spread groove link up, first connecting groove with all be connected with the strip that compresses tightly along its length direction fixedly on the inside wall of second connecting groove, the top of strip that compresses tightly is the plane, the bottom of strip that compresses tightly is the inclined plane, the strip thickness that compresses tightly in the first connecting groove is from being close to the one end of first connecting hole to keeping away from the one end of first connecting hole increases gradually, strip thickness in the second connecting groove from being close to one end that the second connecting hole increases gradually to the one end that the second connecting hole kept away from.
Above-mentioned a molten steel guiding mechanism for molten steel atomizing powder process, first coupling assembling includes first connecting plate, first up buckle and first buckle down, the length of first connecting plate with smelt the height of crucible and equal, just first connecting plate laminating is in smelt on the lateral wall of crucible, the bottom vertical fixedly connected with of first connecting plate first buckle down, fixedly connected with first connecting block on the top of first buckle down, set up flutedly on the lateral wall of first connecting block, first buckle laminating down is in smelt on the diapire of crucible, first connecting block inserts in the second spread groove, just compress tightly the strip card in the second spread groove in the recess on the first connecting block, the top vertical fixedly connected with of first connecting plate is gone up the buckle, first last buckle laminating is in smelt on the roof of crucible, first pin hole has been seted up on the buckle on the first, the position of first pin hole with first connecting hole is relative, first connecting plate has on the first lateral wall fixed connection on the first buckle of first side.
Above-mentioned a molten steel guiding mechanism for molten steel atomizing powder process, second coupling assembling includes second connecting plate, second lower buckle and second upper buckle, the length of second connecting plate equals smelt the height of crucible, just the laminating of second connecting plate is in smelt on the lateral wall of crucible, the perpendicular fixed mounting of second lower buckle is in on the bottom of second connecting plate, the laminating of second connecting plate is in smelt on the diapire of crucible, the second pinhole has been seted up on the top of second connecting plate, the second pinhole with the position of second connecting hole corresponds, fixedly connected with second connecting block on the bottom of second upper buckle, the recess has also been seted up to the both sides of second connecting block, the laminating of second upper buckle is in smelt on the roof of crucible, the second connecting block inserts in the first spread groove, the strip card that compresses tightly in the first spread groove in the recess on the lateral wall of second connecting block, the lateral wall upper portion fixed mounting of second upper briquetting, the lateral wall of second connecting plate has the roof and the equal parallel and level of second baffle.
According to the molten steel flow guiding mechanism for atomizing molten steel to prepare powder, the width of the flow guiding plate gradually decreases from one end close to the axis of the smelting crucible to one end far away from the axis of the smelting crucible, and two sides of the flow guiding plate are respectively and tightly attached to the opposite surfaces of the first upper buckle plate and the second upper buckle plate; the first upper pressing block and the second upper pressing block are respectively pressed on two sides of the top wall of the guide plate; clamping grooves are formed in two sides of the bottom of the guide plate, clamping pins are arranged in the clamping grooves, and the side wall surfaces of the two clamping pins are respectively and tightly attached to the outer wall surfaces of the first baffle plate and the outer wall surfaces of the second baffle plate; the radial distance between the end, close to the first connecting hole, of the first connecting groove and the axis of the smelting crucible is gradually reduced, and the radial distance between the end, far away from the first connecting hole, of the first connecting groove and the axis of the smelting crucible is gradually reduced, and the radial distance between the end, close to the second connecting hole, of the second connecting groove and the axis of the smelting crucible is gradually reduced, and the radial distance between the end, far away from the second connecting hole, of the second connecting groove and the axis of the smelting crucible is gradually reduced; pins penetrate into the first pin hole and the second pin hole, the pins in the first pin hole are inserted into the first connecting hole, and the pins in the second pin hole are inserted into the second connecting hole; the two clamping grooves are close to each other at one end, far away from each other, of the two clamping grooves are gradually reduced in distance from the axis of the smelting crucible at one end, and the clamping grooves and the axis of the smelting crucible are arranged to form a first upper pressing block and a second upper pressing block, so that the clamping grooves can not only play a role in pressing, but also play a role in backflow, and the molten steel smoothly flows to the guide plate.
According to the molten steel flow guiding mechanism for atomizing and pulverizing the molten steel, the bottom wall of the upper supporting plate is radially provided with the guide groove, the top end of the first hinging rod is rotatably connected with the first roller, and the first roller is in rolling fit in the guide groove; the hydraulic balance assembly comprises a first shell, a first piston and a first movable rod, the first piston is in sliding seal fit in the first shell, one end of the first movable rod is fixedly connected with the first piston, the other end of the first movable rod penetrates out of the top end of the first shell and is hinged to the first hinge rod, the bottom end of the first shell is hinged to the top of the supporting plate, a gas tank is fixedly installed on one side of the first shell, the bottom end of the gas tank is in fluid conduction with the bottom end of the first shell through a high-pressure pipeline, hydraulic oil is filled in a piston cavity between the first shell and the first piston, compressed gas is filled in the gas tank, and the fixing assembly is in fluid conduction with one side of the bottom end of the first shell through a pipeline.
Above-mentioned a molten steel guiding mechanism for molten steel atomizing powder process, fixed subassembly includes the second shell, the lateral wall one end of second shell pass through the pipeline with the bottom fluid of first shell switches on, sliding seal cooperates in the second shell has the second piston, the top fixedly connected with second movable rod of second piston, the other end of second movable rod wears out the second shell, the cover has the spring on the second movable rod, the one end of spring is supported and is in on the second piston, the other end of spring is supported and is in on the internal face of second shell, the intercommunicating pore has been seted up on one side of second shell, the connecting hole has been seted up on the second piston.
Above-mentioned a molten steel guiding mechanism for molten steel atomizing powder process, the installation cavity has been seted up on the top of backup pad, the second articulated rod is close to one end bottom fixed mounting of atomizing crucible has the fixed ear, second shell fixed mounting is in the installation cavity, the fixed ear inserts in the installation cavity, the second movable rod inserts in the fixed orifices on the fixed ear.
Above-mentioned a molten steel guiding mechanism for molten steel atomizing powder process, articulated have buffer assembly on the one end bottom that the balancing weight was equipped with to the second articulated lever, buffer assembly's the other end with the backup pad is articulated, buffer assembly includes third shell, third piston and third movable rod, third piston sliding seal cooperates in the third shell, the one end of third movable rod with third piston fixed connection, the other end of third movable rod wear out the third shell and with the backup pad is articulated, the top of third shell with the bottom of second articulated lever is articulated, install a glass section of thick bamboo through the connecting pipe on the lateral wall of third shell, the last gas pocket of seting up of a glass section of thick bamboo, the second articulated lever is close to on the one end top of atomizing crucible axis has seted up the mounting groove, the glass section of thick bamboo is installed in the mounting groove, the mounting groove is installed and is pressed the nail, the top of pressing the nail is outstanding the second articulated lever, the other end of pressing the nail is supported in the glass section of thick bamboo.
Above-mentioned a molten steel guiding mechanism for molten steel atomizing powder process, distance regulation and control subassembly includes guide bar, support frame, first gear and second gear, the top of guide bar with mount board fixed connection, the other end of guide bar runs through the backup pad and fixed mounting have first rack, the bottom fixedly connected with support frame of backup pad, rotate on the tip of support frame and install the pivot, coaxial fixed mounting has first gear and second gear in the pivot, the diameter of first gear is greater than the diameter of second gear, first rack with second gear engagement, fixed mounting has the guide rail on the bottom of backup pad, slidable mounting has the second rack on the guide rail, the second rack with first gear engagement, the lateral wall of gas spraying ring with the lateral wall fixed connection of second rack.
The technical scheme of the invention has the following beneficial technical effects:
1. according to the invention, the first connecting components and the first connecting plates are arranged and installed on the two sides of the smelting crucible, so that the convenient and quick installation and fixation of the guide plates are realized, the integral modularization degree is high, the assembly can be carried out without using special tools, the tightness degree is high after the assembly is in place, the assembly is not easy to loosen, the sealing effect can be realized by using a small amount of fire clay, the construction period for waiting for drying the fire clay after the assembly is shortened, the integral structural strength is realized by the assembly structure, the high-quality fire clay is not required to be adopted to ensure the connection strength, the integral structure is ensured to be stable and reliable, the fire clay usage amount is further reduced, the cost is reduced, and the construction time is shortened; by arranging the first connecting block and the second connecting block which are staggered up and down, the structural strength of the two ends of the first connecting plate and the second connecting plate is complemented due to higher integral structural strength, so that even if the pin is broken, the risk of falling off is avoided, and the safety coefficient is improved; through setting up the second spread groove of wedge-shaped first spread groove, slope and slope, can be after first coupling assembling and second coupling assembling, when conical guide plate installs, inwards paste the smelting crucible and compress tightly the guide plate downwards when gradually strutting first coupling assembling and second coupling assembling to both sides, installation and fastening are in place one step, through setting up pin and bayonet lock, can play the effect that improves fixed effect, owing to there is the function of automatic compressing tightly, the at utmost improves sealed and connection effect and reduces fireclay use amount.
2. According to the invention, the hydraulic balance assembly is arranged, so that the distance between the atomizing crucible and the supporting plate can be controlled by utilizing the weight of molten steel in the atomizing crucible, and the distance between the spraying ring and the molten steel outlet can be adjusted, thereby realizing dynamic automatic adjustment, reducing the particle size distribution of atomized powder, and by arranging the fixing assembly, the second hinging rod balanced by gravity can be automatically started when the hydraulic balance assembly fails, and the running stability of the device is improved; through setting up buffer unit, guarantee that the second articulated level is steady when contacting with first articulated level.
Drawings
FIG. 1 is a schematic perspective view of a melting crucible of the present invention;
FIG. 2 is a perspective schematic perspective view of a melting crucible of the present invention;
FIG. 3 is a perspective schematic perspective view of a first connector assembly of the present invention;
FIG. 4 is a perspective schematic perspective view of a second connector assembly of the present invention;
FIG. 5 is a perspective schematic perspective view of a baffle of the present invention;
FIG. 6 is a schematic view of the installation structure of the atomizing crucible of the present invention;
FIG. 7 is a schematic cross-sectional view of a hydraulic balancing assembly of the present invention;
FIG. 8 is a schematic cross-sectional view of a cushioning assembly of the present invention;
FIG. 9 is a schematic diagram of the engagement of a second gear with a first rack in accordance with the present invention;
Fig. 10 is a schematic view of the engagement structure of the first gear and the second rack gear of the present invention.
The reference numerals in the drawings are as follows: 1-smelting a crucible; 101-a first connection hole; 102-a first connecting slot; 103-pressing the strip; 104-a second connection hole; 105-a second connecting slot; 2-a first connection assembly; 201-a first connection plate; 202-a first upper pinch plate; 203-a first pin hole; 204-a first connection block; 205-a first baffle; 206-a first upper press block; 207-first lower pinch plate; 3-a second connection assembly; 301-a second connection plate; 302-a second lower gusset; 303-a second pin hole; 304-a second upper pinch plate; 305-a second upper press block; 306-a second baffle; 307-second connection block; 4-a deflector; 401-a clamping groove; 402-bayonet; 5-atomizing the crucible; 6-a hydraulic balancing assembly; 601-a first housing; 602-a first piston; 603-a first movable bar; 604-gas tank; 605-a second housing; 606-a second piston; 607-connecting holes; 608-a communication hole; 609-a second movable bar; 610-a spring; 7-a buffer assembly; 701-a third housing; 702-a third piston; 703-a third movable bar; 704-connecting pipes; 705-glass cylinder; 706-stapling; 8-distance control components; 801-a support frame; 802-a first gear; 803-a second gear; 804-a first rack; 805 a guide rail; 806-a second rack; 9-an upper supporting plate; 10-a first hinge lever; 11-a first roller; 12-a second hinge lever; 13-balancing weight; 14-a second roller; 15-a guide rod; 16-spraying ring; 17-a supporting plate.
Detailed Description
Referring to fig. 1 and 6, a molten steel guiding mechanism for atomizing molten steel to prepare powder in this embodiment includes a smelting crucible 1 and an atomizing crucible 5, molten steel after smelting in the smelting crucible 1 is poured into the atomizing crucible 5, a first connecting component 2 and a second connecting component 3 are relatively installed on a side wall surface of the smelting crucible 1, a guiding plate 4 is installed at the top of the smelting crucible 1, the guiding plate 4 is tightly supported between the first connecting component 2 and the second connecting component 3, the top of the first connecting component 2 and the top of the second connecting component 3 are tightly pressed on the top of the guiding plate 4, and the first connecting component 2 and the first connecting plate 201 are installed and installed on two sides of the smelting crucible 1.
An upper supporting plate 9 is fixedly arranged at the bottom of the atomizing crucible 5, a supporting plate 17 is arranged below the atomizing crucible 5, more than three first hinging rods 10 are hinged to the top of the supporting plate 17 along the circumferential direction of the supporting plate, the top ends of the first hinging rods 10 are supported on the bottom wall of the upper supporting plate 9, a hydraulic balance component 6 is hinged to the middle part of the first hinging rods 10, the other end of the hydraulic balance component 6 is hinged to the top of the supporting plate 17, a second hinging rod 12 is hinged to the top edge of the supporting plate 17 through a hinging seat, one end of the second hinging rod 12, which is close to the center of a circle of the supporting plate 17, is positioned right below the first hinging rod 10, a balancing weight 13 is fixedly arranged at one end, which is far away from the center of the supporting plate 17, of the second hinging rod 12, a fixing component is in fluid conduction with the hydraulic balance component 6, the fixing component is arranged on the top of the supporting plate 17, and one end, which is close to the center of the second hinging rod 12, is connected with the top of the supporting plate 17 through a hinging seat; the distance regulating and controlling assembly 8 is arranged on the supporting plate 17, the top end of the distance regulating and controlling assembly 8 is fixedly connected with the bottom wall of the upper supporting plate 9, the air spraying ring 16 is arranged on the distance regulating and controlling assembly 8, the liquid outlet nozzle is arranged at the bottom of the atomizing crucible 5, and the liquid outlet nozzle is inserted into the air spraying ring 16.
As shown in fig. 2, a first connecting hole 101 and a first connecting groove 102 are formed on the top end surface of the melting crucible 1, a second connecting hole 104 and a second connecting groove 105 are formed on the bottom end surface of the melting crucible 1, the positions of the first connecting hole 101 and the second connecting groove 105 are vertically corresponding, the positions of the first connecting groove 102 and the second connecting hole 104 are vertically corresponding, openings which are communicated with the first connecting groove 102 and the second connecting groove 105 are respectively formed on the upper part and the lower part of the outer wall of the melting crucible 1, a pressing strip 103 is fixedly connected on the inner side wall surfaces of the first connecting groove 102 and the second connecting groove 105 along the length direction of the pressing strip 103, the tops of the pressing strips 103 are planes, the bottom of the pressing strip 103 is an inclined plane, the thickness of the pressing strip 103 in the first connecting groove 102 gradually increases from one end close to the first connecting hole 101 to one end far away from the first connecting hole 101, the thickness of the pressing strip 103 in the second connecting groove 105 gradually increases from one end close to the second connecting hole 104 to one end far away from the second connecting hole 104, and the first connecting block 204 and the second connecting block 307 staggered up and down are arranged, so that the structural strength complementation of the two ends of the first connecting plate 201 and the second connecting plate 301 can be realized due to higher integral structural strength, the risk of falling off is avoided even if the pin is broken, and the safety coefficient is improved; through setting up wedge-shaped hold-down strip 103, the first spread groove 102 of slope and the second spread groove 105 of slope, can be after first coupling assembling 2 and second coupling assembling 3, when conical guide plate 4 installs, gradually strut first coupling assembling 2 and second coupling assembling 3 to both sides and inwards paste and smelt crucible 1 and compress tightly guide plate 4 downwards, installation and fastening are one step in place, through setting up pin and bayonet lock 402, can play the effect that improves fixed effect, owing to there is the function of automatic compressing tightly, the at utmost improves sealed and connection effect and reduces the fireclay use amount.
As shown in fig. 2, the first connecting assembly 2 includes a first connecting plate 201, a first upper buckle plate 202 and a first lower buckle plate 207, the length of the first connecting plate 201 is equal to the height of the melting crucible 1, the first connecting plate 201 is attached to the side wall surface of the melting crucible 1, the bottom of the first connecting plate 201 is vertically and fixedly connected with the first lower buckle plate 207, the top of the first lower buckle plate 207 is fixedly connected with a first connecting block 204, the side wall of the first connecting block 204 is provided with a groove, the first lower buckle plate 207 is attached to the bottom wall of the melting crucible 1, the first connecting block 204 is inserted into the second connecting groove 105, the pressing strip 103 in the second connecting groove 105 is clamped into the groove in the first connecting block 204, the top of the first connecting plate 201 is vertically and fixedly connected with the first upper buckle plate 202, the first upper buckle plate 202 is attached to the top wall of the melting crucible 1, the first upper buckle plate 202 is provided with a first pin hole 203, the first pin hole 203 is positioned on the first upper buckle plate 204 is fixedly connected with the first side wall 206, and the first upper buckle plate is fixedly connected with the first side wall 205.
As shown in fig. 3, the second connecting assembly 3 includes a second connecting plate 301, a second lower buckle plate 302 and a second upper buckle plate 304, the length of the second connecting plate 301 is equal to the height of the melting crucible 1, the second connecting plate 301 is attached to the top wall of the melting crucible 1, the second lower buckle plate 302 is vertically and fixedly installed on the bottom of the second connecting plate 301, the second connecting plate 301 is attached to the bottom wall of the melting crucible 1, a second pin hole 303 is formed in the top of the second connecting plate 301, the second pin hole 303 corresponds to the position of the second connecting hole 104, a second connecting block 307 is fixedly connected to the bottom of the second upper buckle plate 304, grooves are formed in two sides of the second connecting block 307, the second upper buckle plate 304 is attached to the top wall of the melting crucible 1, the second connecting block 307 is inserted into the first connecting groove 102, a pressing strip 103 in the first connecting groove 102 is clamped into the groove 304 on the side wall of the second connecting block 307, a second pressing block 306 is fixedly installed on the top wall 205 of the second connecting block 307, and the second top wall 306 is fixedly installed on the second connecting block 205.
As shown in fig. 5, the width of the baffle 4 gradually decreases from one end close to the axis of the melting crucible 1 to one end far from the axis of the melting crucible 1, and two sides of the baffle 4 are respectively and closely attached to opposite surfaces of the first upper pinch plate 202 and the second upper pinch plate 304; the first upper pressing block 206 and the second upper pressing block 305 are respectively pressed on two sides of the top wall of the guide plate 4; clamping grooves 401 are formed in two sides of the bottom of the guide plate 4, clamping pins 402 are installed in the clamping grooves 401, and side wall surfaces of the two clamping pins 402 are respectively and tightly attached to the outer wall surface of the first baffle 205 and the outer wall surface of the second baffle 306; the radial distance between the end, close to the first connecting hole 101, of the first connecting groove 102 and the axis of the smelting crucible 1 is gradually reduced, and the radial distance between the end, far away from the first connecting hole 101, of the first connecting groove 102 and the axis of the smelting crucible 1 is gradually reduced, and the radial distance between the end, close to the second connecting hole 104, of the second connecting groove 105 and the axis of the smelting crucible 1 is gradually reduced, and the radial distance between the end, far away from the second connecting hole 104, of the second connecting groove 105 and the axis of the smelting crucible 1 is gradually reduced; pins are inserted into the first pin hole 203 and the second pin hole 303, the pin in the first pin hole 203 is inserted into the first connecting hole 101, and the pin in the second pin hole 303 is inserted into the second connecting hole 104; the distance between the end, close to each other, of the two clamping grooves 401 and the axis of the melting crucible 1 is gradually reduced to the distance between the end, far away from each other, of the two clamping grooves 401 and the axis of the melting crucible 1.
As shown in fig. 6, a guiding groove is formed in the bottom wall of the upper supporting plate 9 along the radial direction thereof, a first roller 11 is rotatably connected to the top end of the first hinge rod 10, and the first roller 11 is in rolling fit in the guiding groove; the hydraulic balance assembly 6 comprises a first shell 601, a first piston 602 and a first movable rod 603, the first piston 602 is in sliding sealing fit in the first shell 601, one end of the first movable rod 603 is fixedly connected with the first piston 602, the other end of the first movable rod 603 penetrates out of the top end of the first shell 601 and is hinged with the first hinging rod 10, the bottom end of the first shell 601 is hinged with the top of the supporting plate 17, a gas tank 604 is fixedly installed on one side of the first shell 601, the bottom end of the gas tank 604 is in fluid conduction with the bottom end of the first shell 601 through a high-pressure pipeline, hydraulic oil is filled in a piston cavity between the first shell 601 and the first piston 602, compressed gas is filled in the gas tank 604, the fixed assembly is in fluid conduction with one side of the bottom end of the first shell 601 through a pipeline, and by arranging the hydraulic balance assembly 6, the distance between the atomized liquid steel 5 and the supporting plate 17 can be controlled by the weight of the atomized liquid steel and the supporting plate 17, the distance between the atomized liquid steel 16 and an outlet of the atomized liquid steel can be adjusted, and the particle size distribution of the atomized powder can be automatically reduced after the atomized powder is dynamically adjusted.
As shown in fig. 7, the fixing component includes a second housing 605, one end of a side wall of the second housing 605 is in fluid communication with the bottom end of the first housing 601 through a pipeline, a second piston 606 is slidably and sealingly engaged with the second housing 605, a second movable rod 609 is fixedly connected to the top of the second piston 606, the other end of the second movable rod 609 penetrates out of the second housing 605, a spring 610 is sleeved on the second movable rod 609, one end of the spring 610 abuts against the second piston 606, the other end of the spring 610 abuts against an inner wall surface of the second housing 605, a communication hole 608 is formed on one side of the second housing 605, and a connecting hole 607 is formed in the second piston 606, so that when the hydraulic balance component 6 fails, the second hinge rod 12 balanced by gravity can be automatically started, and the running stability of the device is improved.
As shown in fig. 6, the top of the supporting plate 17 is provided with a mounting cavity, a fixed ear is fixedly mounted at the bottom of one end of the second hinge rod 12, which is close to the atomizing crucible 5, the second housing 605 is fixedly mounted in the mounting cavity, the fixed ear is inserted into the mounting cavity, and the second movable rod 609 is inserted into a fixing hole on the fixed ear.
As shown in fig. 6 and 8, the bottom of one end of the second hinge rod 12 provided with the balancing weight 13 is hinged with a buffer assembly 7, the other end of the buffer assembly 7 is hinged with the supporting plate 17, the buffer assembly 7 comprises a third housing 701, a third piston 702 and a third movable rod 703, the third piston 702 is in sliding sealing fit in the third housing 701, one end of the third movable rod 703 is fixedly connected with the third piston 702, the other end of the third movable rod 703 penetrates out of the third housing 701 and is hinged with the supporting plate 17, the top end of the third housing 701 is hinged with the bottom of the second hinge rod 12, a glass cylinder 705 is mounted on the side wall of the third housing 701 through a connecting pipe 704, an air hole is formed in the top of one end of the second hinge rod 12 close to the axis of the atomizing crucible 5, the glass cylinder 705 is mounted in the mounting groove, a press nail 706 is mounted in the mounting groove in a sliding manner, the top end of the press nail 706 protrudes out of the second housing 701, and the other end of the second hinge rod 706 is in contact with the second hinge rod 12 in a stable manner, and the second hinge rod 12 is in contact with the second hinge rod 10.
As shown in fig. 9 and 10, the distance adjusting and controlling assembly 8 includes a guide rod 15, a support frame 801, a first gear 802 and a second gear 803, wherein the top end of the guide rod 15 is fixedly connected with the upper supporting plate 9, the other end of the guide rod 15 penetrates through the support plate 17 and is fixedly provided with a first rack 804, the bottom of the support plate 17 is fixedly connected with the support frame 801, a rotating shaft is rotatably mounted on the end of the support frame 801, the rotating shaft is coaxially and fixedly provided with the first gear 802 and the second gear 803, the diameter of the first gear 802 is larger than that of the second gear 803, the first rack 804 is meshed with the second gear 803, a guide rail 805 is fixedly mounted on the bottom of the support plate 17, a second rack 806 is slidably mounted on the guide rail 805 and is meshed with the first gear 802, and the side wall of the air injection ring 16 is fixedly connected with the side wall of the second gear 806.
The working flow is as follows: when the melting crucible 1 is assembled, the first connecting block 204 is aligned with the opening of the second connecting groove 105 and pushed inwards, then pushed horizontally to the second connecting groove 105, the pressing bar 103 is inserted into the groove, then the second connecting assembly 3 is installed in the same way, the second connecting block 307 is aligned with the opening of the first connecting groove 102 and pushed inwards, then the deflector 4 is installed, the deflector 4 is placed on the top of the melting crucible 1 and inserted between the first connecting assembly 2 and the second connecting assembly 3 from the inner side, pushed outwards, the first connecting assembly 2 and the second connecting assembly 3 can be pushed to both sides due to the gradual widening of the width of the deflector 4, the first connecting assembly 2 and the second connecting assembly 3 move along the first connecting groove 102 and the second connecting groove 105 which are obliquely arranged when moving to both sides, gradually cling to the wall surface of the melting crucible 1 inwards, the bonding degree is improved, the resistance of the guide plate 4 pushing outwards is increased, the two sides of the guide plate 4 are tightly bonded, the first connecting assembly 2 and the second connecting assembly 3 move to the two sides, simultaneously, under the action of the pressing strips 103 in the first connecting groove 102 and the second connecting groove 105, the first connecting assembly 2 and the second connecting assembly 3 move downwards relative to the smelting crucible 1, namely, the purpose of fastening is realized, the guide plate 4 is pressed to be tightly bonded with the top wall of the smelting crucible 1, the connection positions of all the parts are smeared with fireclay according to the requirement, the sealing effect is improved, after the guide plate 4 is in place, the first connecting hole 101 and the second connecting hole 104 are smeared with fireclay, then pins are respectively inserted, the purpose of fixing the top of the first connecting assembly 2 and the bottom of the second connecting assembly 3 is achieved, then the fireclay is smeared in the clamping groove 401, then the clamping pin 402 is inserted, the bayonet 402 is attached to the first baffle 205 and the second baffle 306, so that loosening of the guide plate 4 is avoided, the purposes of connecting the first connecting component 2 with the second connecting component 3 and improving the structural strength between the first connecting component 2 and the second connecting component 3 are achieved, and the guide plate 4 is used for protecting the smelting crucible 1;
Molten steel is smelted in the assembled smelting crucible 1, molten steel is poured into the atomizing crucible 5 after smelting, a certain pressure exists in the hydraulic balance assembly 6 under normal conditions, the pressure acts on the second piston 606, the second movable rod 609 is always in an extension state against the elastic force of the spring 610, and therefore the second hinge rod 12 is locked; when the liquid level in the atomizing crucible 5 is higher and the weight is larger, the top end of the first hinging rod 10 is pressed, so that the hydraulic oil in the first shell 601 flows into the air tank 604, the first movable rod 603 is contracted, the atomizing crucible 5 descends compared with the supporting plate 17 and drives the guide rod 15 to move downwards, the first rack 804 is driven to synchronously move, the second gear 803 is driven to rotate, the first gear 802 is driven to synchronously rotate, the second rack 806 is driven to move downwards after the first gear 802 rotates, the spraying ring 16 is driven to move downwards, because the diameter of the first gear 802 is larger than that of the first gear 802, under the same rotation angle, the linear speed of the first gear 802 is higher, the spraying ring 16 is driven to move, the distance between the liquid nozzle and the bottom of the atomizing crucible 5 is adjusted, when the molten steel in the atomizing crucible 5 is reduced, the compressed air in the air tank 604 pushes hydraulic oil to flow into the first shell 601, the first movable rod 603 is jacked up to enable the atomizing crucible 5 to move upwards, the distance between the air injection ring 16 and the liquid outlet of the atomizing crucible 5 is reduced, the larger the weight of the atomizing crucible 5 is, the higher the liquid level is, the higher the pressure at the liquid outlet is, the liquid outlet speed is high, otherwise, the smaller the pressure at the liquid outlet is, the liquid outlet speed is low, when the liquid outlet speed is low, the distance between the air injection ring 16 and the liquid outlet of the atomizing crucible 5 is increased, the gravity acceleration time of liquid flow is increased, after the distance between the air injection ring 16 and the liquid outlet is increased, the negative pressure of an intermediate area is increased, the liquid flow rate is increased, the liquid flow and air injection are contacted at a relatively stable speed, and the atomized powder granularity is uniform;
After the hydraulic balance assembly 6 leaks, the internal pressure of the hydraulic balance assembly is lower than the normal value, as shown in fig. 7, the spring 610 pushes the second piston 606 and the second movable rod 609 to move downwards, so that the communication hole 608 and the connection hole 607 are communicated, which is equivalent to communicating the first casing 601 with the atmosphere, the end part of the second movable rod 12 is not fixed due to shrinkage of the second movable rod 609, the buffer assembly 7 is extruded under the action of the balancing weight 13, the other end of the buffer assembly 7 is pressed to rise, the other end of the second movable rod 12 is moved upwards at a gentle speed under the limit of the exhaust speed of the glass cylinder 705 of the buffer assembly 7, the impact force when contacting the first hinge rod 10 is reduced, and the pressing nail 706 protrudes the second hinge rod 12, after the pressing nail 706 contacts the second hinge rod 12, the pressure is acted on the glass cylinder 705 and the restriction of the glass cylinder 705 on the air flow is relieved, the buffer assembly 7 is enabled to run without resistance, and the second roller 14 contacts the first hinge rod 10, so that the balance effect is achieved.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While the obvious variations or modifications which are extended therefrom remain within the scope of the claims of this patent application.
Claims (5)
1. The molten steel flow guiding mechanism for atomizing and pulverizing molten steel comprises a smelting crucible (1) and an atomizing crucible (5), and is characterized in that molten steel smelted by the smelting crucible (1) is poured into the atomizing crucible (5), a first connecting component (2) and a second connecting component (3) are oppositely arranged on the side wall surface of the smelting crucible (1), a flow guiding plate (4) is arranged at the top of the smelting crucible (1), the flow guiding plate (4) is tightly supported between the first connecting component (2) and the second connecting component (3), and the tops of the first connecting component (2) and the second connecting component (3) are tightly pressed on the top of the flow guiding plate (4); an upper supporting plate (9) is fixedly arranged at the bottom of the atomizing crucible (5), a supporting plate (17) is arranged below the atomizing crucible (5), more than three first hinging rods (10) are hinged to the top of the supporting plate (17) along the circumferential direction of the supporting plate, the top end of each first hinging rod (10) is supported on the bottom wall of the upper supporting plate (9), a hydraulic balance component (6) is hinged to the middle part of each first hinging rod (10), the other end of each hydraulic balance component (6) is hinged to the top of the supporting plate (17), a second hinging rod (12) is hinged to the top edge of the supporting plate (17) through a hinging seat, one end, close to the center of the corresponding supporting plate (17), of each second hinging rod (12) is positioned under each first hinging rod (10), a balancing weight (13) is fixedly arranged at one end, far away from the center of the corresponding supporting plate (17), a fixing component is arranged on the middle part of each first hinging rod (6), a fixing component is arranged on the top of the supporting plate (17), a second hinging rod (12) is hinged to the top of the supporting plate (17), and one end, close to the center of the supporting plate (17), of the second hinging rod (17) is connected with the top of the fixing component; the device is characterized in that a distance regulating and controlling component (8) is arranged on the supporting plate (17), the top end of the distance regulating and controlling component (8) is fixedly connected with the bottom wall of the upper supporting plate (9), a gas spraying ring (16) is arranged on the distance regulating and controlling component (8), a liquid outlet nozzle is arranged at the bottom of the atomizing crucible (5), and the liquid outlet nozzle is inserted into the gas spraying ring (16); a first connecting hole (101) and a first connecting groove (102) are formed in the top end face of the smelting crucible (1), a second connecting hole (104) and a second connecting groove (105) are formed in the bottom end face of the smelting crucible (1), the positions of the first connecting hole (101) and the second connecting groove (105) are vertically corresponding, the positions of the first connecting groove (102) and the second connecting hole (104) are vertically corresponding, openings which are communicated with the first connecting groove (102) and the second connecting groove (105) are respectively formed in the upper part and the lower part of the outer wall of the smelting crucible (1), a pressing strip (103) is fixedly connected to the inner side wall face of the first connecting groove (102) and the inner side wall face of the second connecting groove (105) along the length direction of the pressing strip, the tops of the pressing strip (103) are all planes, the bottoms of the pressing strip (103) are inclined planes, the thickness of the pressing strip (103) in the first connecting groove (102) is gradually increased from the first connecting groove (102) to the inner end (103) which is far away from the first connecting hole (101) to the second connecting groove (105); the first connecting component (2) comprises a first connecting plate (201), a first upper buckle plate (202) and a first lower buckle plate (207), the length of the first connecting plate (201) is equal to the height of the smelting crucible (1), the first connecting plate (201) is attached to the side wall surface of the smelting crucible (1), the first lower buckle plate (207) is vertically and fixedly connected with the bottom of the first connecting plate (201), the first connecting block (204) is fixedly connected with the top of the first lower buckle plate (207), a groove is formed in the side wall of the first connecting block (204), the first lower buckle plate (207) is attached to the bottom wall of the smelting crucible (1), the first connecting block (204) is inserted into the second connecting groove (105), the pressing strip (103) in the second connecting groove (105) is clamped into the groove in the first connecting block (204), the first upper buckle plate (202) is vertically and fixedly connected with the top of the first connecting plate (202), the first upper buckle plate (202) is attached to the first upper buckle plate (203) and the first upper buckle plate (203) is fixedly connected with the first upper buckle plate (203), a first baffle (205) is fixedly connected to the top of the side wall of the first connecting plate (201); the second connecting component (3) comprises a second connecting plate (301), a second lower buckle plate (302) and a second upper buckle plate (304), the length of the second connecting plate (301) is equal to the height of the smelting crucible (1), the second connecting plate (301) is attached to the side wall of the smelting crucible (1), the second lower buckle plate (302) is vertically and fixedly installed on the bottom of the second connecting plate (301), the second connecting plate (301) is attached to the bottom wall of the smelting crucible (1), a second pin hole (303) is formed in the top of the second connecting plate (301), the second pin hole (303) corresponds to the position of the second connecting hole (104), a second connecting block (307) is fixedly connected to the bottom of the second upper buckle plate (304), grooves are formed in two sides of the second connecting block (307), the second upper buckle plate (304) is attached to the top wall of the smelting crucible (1), the second connecting block (103) is inserted into the first connecting groove (103), the second connecting block (102) is fixedly installed on the side wall of the second connecting block (305), the top walls of the first baffle plate (205) and the second baffle plate (306) are flush with the top wall of the smelting crucible (1); the width of the guide plate (4) gradually decreases from one end close to the axis of the smelting crucible (1) to one end far away from the axis of the smelting crucible (1), and two sides of the guide plate (4) are respectively and tightly attached to the opposite surfaces of the first upper buckle plate (202) and the second upper buckle plate (304); the first upper pressing block (206) and the second upper pressing block (305) are respectively pressed on two sides of the top wall of the guide plate (4); clamping grooves (401) are formed in two sides of the bottom of the guide plate (4), clamping pins (402) are arranged in the clamping grooves (401), and the side wall surfaces of the two clamping pins (402) are respectively and tightly attached to the outer wall surface of the first baffle plate (205) and the outer wall surface of the second baffle plate (306); the radial distance between one end of the first connecting groove (102) close to the first connecting hole (101) and the axis of the smelting crucible (1) is gradually reduced, the radial distance between one end of the first connecting groove (102) far away from the first connecting hole (101) and the axis of the smelting crucible (1) is gradually reduced, and the radial distance between one end of the second connecting groove (105) close to the second connecting hole (104) and the axis of the smelting crucible (1) is gradually reduced, and the radial distance between one end of the second connecting groove (105) far away from the second connecting hole (104) and the axis of the smelting crucible (1) is gradually reduced; pins penetrate into the first pin hole (203) and the second pin hole (303), the pin in the first pin hole (203) is inserted into the first connecting hole (101), and the pin in the second pin hole (303) is inserted into the second connecting hole (104); the distance between the axis of the melting crucible (1) and one end, close to each other, of the two clamping grooves (401) is gradually reduced to the distance between the axis of the melting crucible (1) and one end, far away from each other, of the two clamping grooves (401); the distance regulating and controlling assembly (8) comprises a guide rod (15), a supporting frame (801), a first gear (802) and a second gear (803), the top end of the guide rod (15) is fixedly connected with the upper supporting plate (9), the other end of the guide rod (15) penetrates through the supporting plate (17) and is fixedly provided with a first rack (804), the bottom of the supporting plate (17) is fixedly connected with the supporting frame (801), a rotating shaft is rotatably arranged at the end of the supporting frame (801), the rotating shaft is coaxially and fixedly provided with the first gear (802) and the second gear (803), the diameter of the first gear (802) is larger than that of the second gear (803), the first rack (804) is meshed with the second gear (803), a guide rail (805) is fixedly arranged at the bottom of the supporting plate (17), a second rack (806) is slidably arranged on the guide rail (805), and the side wall of the air injection ring (16) is meshed with the second rack (802).
2. The molten steel flow guiding mechanism for atomizing and pulverizing molten steel according to claim 1, wherein a guide groove is formed in the bottom wall of the upper supporting plate (9) along the radial direction of the bottom wall, a first roller (11) is rotatably connected to the top end of the first hinging rod (10), and the first roller (11) is in rolling fit in the guide groove; the hydraulic balance assembly (6) comprises a first shell (601), a first piston (602) and a first movable rod (603), the first piston (602) is in sliding sealing fit in the first shell (601), one end of the first movable rod (603) is fixedly connected with the first piston (602), the other end of the first movable rod (603) penetrates out of the top end of the first shell (601) and is hinged with the first hinging rod (10), the bottom end of the first shell (601) is hinged with the top of the supporting plate (17), a gas tank (604) is fixedly installed on one side of the first shell (601), the bottom end of the gas tank (604) is in fluid conduction with the bottom end of the first shell (601) through a high-pressure pipeline, hydraulic oil is filled in a piston cavity between the first shell (601) and the first piston (602), compressed gas is filled in the gas tank (604), and the fixing assembly is in fluid conduction with one side of the first shell (601) through a pipeline.
3. The molten steel flow guiding mechanism for atomizing and pulverizing molten steel according to claim 2, wherein the fixing component comprises a second housing (605), one end of the side wall of the second housing (605) is in fluid communication with the bottom end of the first housing (601) through a pipeline, a second piston (606) is in sliding sealing fit with the second housing (605), a second movable rod (609) is fixedly connected to the top of the second piston (606), the other end of the second movable rod (609) penetrates out of the second housing (605), a spring (610) is sleeved on the second movable rod (609), one end of the spring (610) abuts against the second piston (606), the other end of the spring (610) abuts against the inner wall surface of the second housing (605), a communication hole (608) is formed in one side of the second housing (605), and a connecting hole (607) is formed in the second piston (606).
4. A molten steel flow guiding mechanism for atomizing and pulverizing molten steel according to claim 3, wherein a mounting cavity is formed in the top of the supporting plate (17), a fixing lug is fixedly mounted at the bottom of one end of the second hinging rod (12) close to the atomizing crucible (5), the second housing (605) is fixedly mounted in the mounting cavity, the fixing lug is inserted into the mounting cavity, and the second movable rod (609) is inserted into a fixing hole in the fixing lug.
5. The molten steel flow guiding mechanism for atomizing and pulverizing molten steel according to claim 1, wherein a buffer component (7) is hinged on the bottom of one end of the second hinging rod (12) provided with a balancing weight (13), the other end of the buffer component (7) is hinged with the supporting plate (17), the buffer component (7) comprises a third shell (701), a third piston (702) and a third movable rod (703), the third piston (702) is in sliding sealing fit in the third shell (701), one end of the third movable rod (703) is fixedly connected with the third piston (702), the other end of the third movable rod (703) penetrates out of the third shell (701) and is hinged with the supporting plate (17), the top end of the third shell (701) is hinged with the bottom of the second hinging rod (12), a glass cylinder (705) is mounted on the side wall of the third shell (701) through a connecting pipe (704), an air hole is formed in the glass cylinder (705), one end of the third movable rod (703) is fixedly connected with the third piston (702), the second hinging rod (12) is provided with a protruding groove (706) near the top of the second hinging rod (706), the top of the third hinging rod (706) is mounted in the crucible (12), the other end of the pressing nail (706) is propped against the glass cylinder (705).
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