CN107828934A - A kind of Dreg Scraping Device of Oxygen Lance - Google Patents

Abstract

The invention provides an oxygen lance slag scraper, which comprises a fixed frame, on which a driving shaft and a driven shaft are arranged symmetrically, and the two ends of the driving shaft are respectively provided with a connecting rod 1 and a connecting rod rotating around the axis of the driving shaft 2. One end of the driven shaft is provided with a connecting rod 3 that rotates around the axis of the driven shaft. The driving shaft is connected to the driving mechanism through the connecting rod 1. The connecting rod 2 is connected to the connecting rod 3 through the connecting rod assembly. The driving shaft and the driven shaft A set of scraper assemblies are respectively arranged on the shaft, and the two sets of scraper assemblies are symmetrically distributed. The oxygen lance slag scraper adopts a planar four-bar mechanism to realize the synchronous opening and closing of the scraper assembly. The connecting rod runs smoothly, and the rigidity of the slag scraper is enhanced. Multiple scrapers are arranged so that the steel slag on the outer wall of the oxygen lance has multiple stress points, which is more helpful for breaking the steel slag and improving the effect of scraping the slag.

Description

An oxygen gun slag scraper

technical field

The invention belongs to the technical field of steelmaking production equipment in the metallurgical industry, and in particular relates to an oxygen lance slag scraper.

Background technique

Oxygen lance is one of the key equipments in converter steelmaking. It is responsible for blowing oxygen into the molten pool in the converter during blowing and blowing nitrogen into the converter after blowing to protect the furnace lining by splashing slag. Oxygen lance will inevitably adhere to steel slag on the outer steel pipe of the oxygen lance during blowing and slag splashing to protect the furnace. The steel slag is getting thicker and thicker. In serious cases, the oxygen lance cannot be raised and lowered normally. If the operation is forced, the oxygen lance lifting motor will be burned or the steel wire rope will be broken. The cut oxygen lance needs to be replaced with a new oxygen lance, which greatly reduces the service life of the oxygen lance, which not only increases the loss cost of the oxygen lance, but also frequently cuts and changes the lance, which destroys the continuity of steelmaking production and increases labor costs. labor intensity.

At present, there are two types of oxygen lance steel slag cleaning methods: manual cleaning and automatic slag scraping: 1) When manual cleaning is used to clean the steel slag adhered to the oxygen lance, not only the working environment is bad, the labor intensity is high, and it can only be cleaned when the production is stopped. 2) The existing automatic slag scraping equipment basically has the same principle of scraping slag, which is when the oxygen lance is lifted out of the oxygen lance when the converter blowing or slag splash protection is completed, The pneumatic control device of the oxygen lance slag scraper drives the left and right mechanical arms, so that the U-shaped or semicircular slag scraper cutter head of the mechanical arm closes to surround the oxygen lance adhered to the steel slag. When the oxygen lance is lifted, the slag scraper cutter head Start scraping off the steel slag adhering to the oxygen lance. However, the complexity of the oxygen lance operation will inevitably lead to the mixture of steel slag on the oxygen lance, sometimes even a layer of steel and a layer of slag. In this case, the existing oxygen lance slag scraper is difficult to scrape off the steel slag adhered to the oxygen lance. If the steel slag cannot be effectively removed, it is very easy to cause a safety accident, so there is a potential safety hazard.

Contents of the invention

The purpose of the invention is to overcome the problems of poor scraping effect, short service life and potential safety hazards of existing oxygen lance slag scraping equipment.

For this reason, an embodiment of the present invention provides an oxygen lance slag scraper, including a fixed frame, on which a driving shaft and a driven shaft are symmetrically arranged, and two ends of the driving shaft are respectively provided with shafts around the driving shaft. Connecting rod 1 and connecting rod 2 that rotate centrally, one end of the driven shaft is provided with a connecting rod 3 that rotates around the axis of the driven shaft, the driving shaft is connected with a driving mechanism through connecting rod 1, and the connecting rod 2 The connecting rod assembly is connected with the connecting rod three, and a set of scraper assemblies are respectively arranged on the driving shaft and the driven shaft, and the two sets of scraper assemblies are symmetrically distributed.

Further, four bearing seats are arranged on the fixed frame, and both ends of the driving shaft and the driven shaft are connected to the bearing seats through bearings.

Further, the drive shaft has a double cantilever structure, and the connecting rod 1 and the connecting rod 2 are respectively connected to the cantilever parts at both ends of the drive shaft through keys.

Further, the driven shaft is a single cantilever structure, and the connecting rod 3 is connected to the cantilever part of the driven shaft through a key.

Further, the drive mechanism includes a cylinder base, a cylinder and a fork, the cylinder is fixed on the cylinder base through its tail lug, the movable end of the cylinder is connected to one end of the fork, and the other end of the fork is connected to the connecting rod. hinged.

Further, the connecting rod assembly includes two connecting rod yokes, a tie rod and a nut, one end of the two connecting rod yokes is threadedly connected to the two ends of the pull rod respectively, and is locked by a nut, and the two connecting rod yokes The other end of the rod fork is respectively hinged with the second connecting rod and the third connecting rod.

Further, the axes of the second connecting rod, the third connecting rod and the third connecting rod assembly are located in the same plane.

Further, the scraper assembly includes a scraper, a blade holder and a scraper, there are multiple blade holders, and the plurality of blade holders are fixedly arranged on the upper surface of the scraper, the scraper is installed on the blade holder, and the drive shaft and The tip of the scraper on the driven shaft is located on a concentric circle with the same diameter as the oxygen lance.

Further, the opposite sides of the two scrapers on the driving shaft and the driven shaft are arc-shaped structures adapted to the outer wall of the oxygen lance, and the scrapers on the driving shaft and the driven shaft are distributed symmetrically.

Further, the driving shaft and the driven shaft are welded with a fixing frame, and the scraper assembly is detachably connected to the fixing frame through a bolt connection.

Compared with prior art, the beneficial effect of the present invention:

(1) The oxygen lance slag scraper provided by the present invention adopts a planar four-bar mechanism to realize the synchronous opening and closing of the scraper assembly. The service life of the slag trap.

(2) The oxygen lance slag scraper provided by the present invention is equipped with multiple scrapers, so that the steel slag on the outer wall of the oxygen lance has multiple stress points, which is more conducive to breaking the steel slag, the scraping effect is improved, and the scraping effect is effectively reduced. The pressure of the slag further protects the wire rope for lifting the oxygen lance and prolongs the service life of the oxygen lance and other related equipment.

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the front view of oxygen lance slag scraper of the present invention;

Fig. 2 is the top view of oxygen lance slag scraper of the present invention;

Fig. 3 is the left view of the oxygen lance slag scraper of the present invention;

Fig. 4 is a rear view of the oxygen lance slag scraper of the present invention.

Explanation of reference signs: 1, fixed frame; 2, connecting rod two; 3, driving shaft; 4, scraper assembly; 5, pull rod; 6, nut; 7, connecting rod fork; 8, connecting rod three; Moving shaft; 10, driving mechanism; 11, bolt connector; 12, fixed frame; 13, scraper; 14, connecting rod one; 15, key; 16, fork; 17, cylinder; 18, cylinder base; 19, Bearing seat; 20, bearing; 21, knife holder; 22, scraper.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present invention; The meaning is two or more.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, this embodiment provides an oxygen lance slag scraper, including a fixed frame 1, and the fixed frame 1 is provided with a driving shaft 3 and a driven shaft in mirror-image symmetry 9. The two ends of the driving shaft 3 are respectively provided with a connecting rod one 14 and a connecting rod two 2 which rotate around the axis of the driving shaft 3, and one end of the driven shaft 9 is provided with a connecting rod which rotates around the axis of the driven shaft 9. Connecting rod three 8, the driving shaft 3 is connected with the driving mechanism 10 through the connecting rod one 14, the connecting rod two 2 is connected with the connecting rod three 8 through the connecting rod assembly, and the driving shaft 3 and the driven shaft 9 respectively A set of scraper assemblies 4 is provided, and two sets of scraper assemblies 4 are symmetrically distributed. When the oxygen lance slag scraper of this embodiment is used to scrape slag from the oxygen lance, the driving mechanism 10 pushes the driving shaft 3 to rotate through the connecting rod 14, and the connecting rod 2 on the other end of the driving shaft 3 drives the driving shaft 3 through the connecting rod assembly. The connecting rod 3 8 on the driving shaft 9 moves, thereby driving the driven shaft 9 to rotate, so that the two groups of scraper assemblies 4 on the driving shaft 3 and the driven shaft 9 move toward each other, hug the oxygen lance, and lift the oxygen lance upwards , the steel slag is scraped off under the action of the scraper assembly 4, and the oxygen lance slag scraping is completed; when the oxygen lance slag scraper completes the slag scraping, the driving mechanism 10 retracts, and the driving shaft 3 is driven to rotate in the opposite direction through the connecting rod 14, and at the same time, the The connecting rod 2 on the other end of the shaft 3 drives the connecting rod 3 8 on the driven shaft 9 to move in the opposite direction through the connecting rod assembly, thereby driving the driven shaft 9 to rotate in the opposite direction, so that the driving shaft 3 and the driven shaft 9 Two groups of scraper assemblies 4 move in opposite directions. In this embodiment, connecting rod two 2, connecting rod three 8, and the connecting rod assembly are hinged to form a double rocker mechanism in the planar four-bar mechanism, which realizes the synchronous opening and closing of the scraper assembly 4, the double rocker mechanism operates smoothly, and the rigidity of the scraper Enhanced to increase the service life of the slag scraper.

In a refined embodiment, four bearing housings 19 are arranged on the fixed frame 1, and both ends of the driving shaft 3 and the driven shaft 9 are connected to the bearing housings 19 through bearings 20 to realize rotation around the center of the shaft. . The drive shaft 3 is a double cantilever structure, the first connecting rod 14 and the second connecting rod 2 are respectively connected to the cantilever parts at both ends of the driving shaft 3 through the key 15, and the first connecting rod 14 and the second connecting rod 2 are in the same initial installation position and the driven shaft 9 is a single cantilever structure, the connecting rod three 8 is connected to the cantilever part of the driven shaft 9 through the key 15, preferably, the connecting rod two 2, the connecting rod three 8 and the connecting rod assembly The axes of the three are located in the same plane to form a planar four-bar mechanism, which saves effort to drive its movement, runs smoothly and reduces energy consumption.

One embodiment, the drive mechanism 10 includes a cylinder base 18, a cylinder 17 and a fork 16, the cylinder 17 is fixed on the cylinder base 18 through its tail lug seat, and the movable end of the cylinder 17 is connected to one end of the fork 16, The other end of the fork 16 is hinged with the connecting rod-14; when the oxygen lance is scraped, the cylinder 17 controls the piston rod of the cylinder to extend, and the fork 16 at the movable end of the piston rod drives the connecting rod-14 to move, thereby pushing the driving shaft 3 rotations; and after finishing the slag scraping, the cylinder 17 controls the piston rod to retreat, and the fork 16 at the movable end of the piston rod drives the connecting rod 14 to move in reverse, thereby promoting the drive shaft 3 to rotate in reverse. The connecting rod assembly comprises two connecting rod yokes 7, a pull rod 5 and a nut 6, one end of the two connecting rod yokes 7 is threadedly connected with the two ends of the pull rod 5 respectively, and is locked by the nut 6, and the two The other end of the connecting rod yoke 7 is respectively hinged with the connecting rod two 2 and the connecting rod three 8, and the length of the connecting assembly can be adjusted through a thread pair.

The scraper assembly 4 includes a scraper 13, a blade holder 21 and a scraper 22, the blade holder 21 has a plurality, and the plurality of blade holders 21 are fixedly arranged on the upper surface of the scraper 13, as shown in Figure 2, in this implementation Three knife rests 21 are installed on each scraper 13, and a scraper 22 is installed on each knife rest 21, and the knife tip of the scraper 22 on the driving shaft 3 and the driven shaft 9 is located on a concentric circle with the same diameter as the oxygen lance, Make sure that the scraper 22 adheres to the outer wall of the oxygen lance. The opposite sides of the two scrapers 13 on the driving shaft 3 and the driven shaft 9 are arc-shaped structures adapted to the outer wall of the oxygen lance, and the scrapers 22 on the driving shaft 3 and the driven shaft 9 are symmetrically distributed, The scraper 13 corresponds to the surface of the outer wall of the oxygen lance, so that the two sets of scraper assemblies 4 can close up and surround the oxygen lance, improving the effect of scraping slag. Preferably, the driving shaft 3 and the driven shaft 9 are welded with a fixing frame 12, and the scraper assembly 4 is detachably connected to the fixing frame 12 through a bolt connection 11, so that the scraper assembly 4 can be quickly replaced. Further, the scraper 22 and the knife holder 21 can be detachably connected. Specifically, the scraper 22 and the knife holder 21 are connected by connecting bolts. , do not need to disassemble the scraper assembly 4, just loosen the connecting bolts to adjust, or disassemble the connecting bolts of the entire scraper 22, turn the worn scraper 22 at one end and continue to use the unworn part of the other end of the scraper 22, and improve the scraper assembly 4 Long service life, cost saving, or the entire scraper can be disassembled and replaced, without affecting the steelmaking production process, and easy to maintain.

In summary, the oxygen lance slag scraper provided by the present invention adopts a planar four-bar mechanism to realize the synchronous opening and closing of the scraper assembly, the connecting rod runs smoothly, the slag scraper rigidity is enhanced, the structure of the slag scraper is optimized, and the The service life of the slag scraper is improved, and at the same time, by setting multiple scrapers, the steel slag on the outer wall of the oxygen lance has multiple stress points, which is more conducive to breaking the steel slag and improving the slag scraping effect.

The above examples are only illustrations of the present invention, and do not constitute a limitation to the protection scope of the present invention. All designs that are the same as or similar to the present invention fall within the protection scope of the present invention.

Claims (10)

1. A kind of 1. Dreg Scraping Device of Oxygen Lance, it is characterised in that：Including fixed frame (1), master is symmetrically arranged with the fixed frame (1) Moving axis (3) and driven shaft (9), the both ends of the driving shaft (3) are respectively arranged with the connecting rod one around driving shaft (3) axis rotation (14) and connecting rod two (2), one end of the driven shaft (9) are provided with the connecting rod three (8) around driven shaft (9) axis rotation, The driving shaft (3) is connected with drive mechanism (10) by connecting rod one (14), the connecting rod two (2) by link assembly with Connecting rod three (8) is connected, and one group of doctor assemblies (4), two groups of scrapers are respectively arranged with the driving shaft (3) and driven shaft (9) Component (4) is symmetrical.
2. 2. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：Four bearings are provided with the fixed frame (1) The both ends of seat (19), the driving shaft (3) and driven shaft (9) are connected on bearing block (19) by bearing (20).
3. 3. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The driving shaft (3) is double-cantilever structure, the company Extension bar one (14) and connecting rod two (2) are connected with driving shaft (3) both ends cantilever part respectively by key (15).
4. 4. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The driven shaft (9) is single-cantilever structure, the company Extension bar three (8) is connected to the cantilever part of driven shaft (9) by key (15).
5. 5. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The drive mechanism (10) includes air cylinder base (18), cylinder (17) and jaw (16), the cylinder (17) are fixed on air cylinder base (18) by its afterbody ear mount, cylinder (17) movable end is connected with jaw (16) one end, and jaw (16) other end is be hinged with the connecting rod one (14).
6. 6. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The link assembly include two fork of connecting rods (7), Pull bar (5) and nut (6), both ends of two described fork of connecting rod (7) one end respectively with pull bar (5) are connected through a screw thread, and logical Nut (6) locking is crossed, the other end of two fork of connecting rods (7) is be hinged with the connecting rod two (2) and connecting rod three (8) respectively.
7. 7. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The connecting rod two (2), connecting rod three (8) and company In the axis of bar assembly three is generally aligned in the same plane.
8. 8. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：The doctor assemblies (4) include scraper plate (13), knife rest (21) and scraper (22), the knife rest (21) has multiple, and multiple knife rests (21) are fixedly installed on the upper surface of scraper plate (13), described Scraper (22) is arranged on knife rest (21), and the point of a knife of driving shaft (3) and driven shaft (9) upper blade (22) is positioned at straight with oxygen rifle etc. On the concentric circles in footpath.
9. 9. Dreg Scraping Device of Oxygen Lance as claimed in claim 8, it is characterised in that：The driving shaft (3) and upper two of driven shaft (9) are scraped The opposite side of plate (13) is the arc-shaped structure that is adapted with oxygen rifle outer wall, the scraper on the driving shaft (3) and driven shaft (9) (22) it is symmetrical.
10. 10. Dreg Scraping Device of Oxygen Lance as claimed in claim 1, it is characterised in that：Welded on the driving shaft (3) and driven shaft (9) Fixed mount (12) is connect, the doctor assemblies (4) are bolted part (11) and are detachably connected on fixed mount (12).