Oxygen lance slag scraper base connecting device

Abstract

The utility model discloses an oxygen lance slag scraper base connecting device, and belongs to the field of machinery. The device comprises a first connecting piece, a second connecting piece and a pressing plate, the first connecting piece and the second connecting piece are special-shaped pieces, the appearance of the first connecting piece is a cuboid structural plate, a stand column is arranged in the middle of the first connecting piece, a bolt hole is formed in the center of the stand column, wedge-shaped grooves are symmetrically formed in the two sides of the stand column respectively, and the wedge-shaped grooves are matched with the second connecting piece; the structure of the second connecting piece is as follows: the left end is a cuboid plate of which the middle part is hollow and the two sides are internally provided with U-shaped grooves, and the right end is two horizontal plates which are correspondingly arranged up and down; the first connecting piece and the second connecting piece are connected in a matched mode, the pressing plate is placed on the upper portion of the second connecting piece, the pressing plate and the bolt hole of the first connecting piece are tightly pressed through the pin shaft, and therefore the first connecting piece and the second connecting piece are matched more tightly. The device is simple in structure, low in manufacturing cost and convenient to replace.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for oxygen lance scraping, in particular to an oxygen lance scraper base connecting device, belonging to the mechanical field. Background Art

[0002] The main function of oxygen blowing in the converter during the smelting process is to use high-pressure oxygen to oxidize impurities in molten steel, forming insoluble oxides that are discharged from the surface of the molten steel to improve the purity of the molten steel. Due to the temperature difference, a layer of oxide will adhere to the surface of the oxygen lance; the up and down strokes of the oxygen lance are driven by a winch. After the smelting of a furnace of molten steel is completed, the oxide attached to the surface of the oxygen lance is removed by the scraper. During this period, the scraper bears the upward thrust of the oxygen lance and scrapes off the oxide attached to the surface of the oxygen lance; the scraper must bear the mechanical force of the oxygen lance during operation, and the rotation of the scraper causes wear on the pin shaft and base. Under normal circumstances, the service life of the scraper base and pin shaft is 2-3 months. Because the base and the buffer seat adopt a welded structure, there are not only problems such as large error in online replacement of the base and short service life, but also the furnace downtime of about 10 hours / time when the welding structure is replaced, which is time-consuming. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the utility model provides an oxygen lance scraper base connecting device.

[0004] The technical solution adopted by the utility model is:

[0005] An oxygen lance scraper base connecting device is arranged on an original buffer base, and comprises a first connecting member, a second connecting member, and a pressing plate; after the first connecting member and the second connecting member are assembled and welded, the pressing plate is placed on the upper part of the second connecting member, and a pin is used to press the pressing plate and the bolt hole position of the first connecting member, so that the first connecting member and the second connecting member fit more tightly.

[0006] The first connecting member and the second connecting member are both special-shaped members. The structure of the first connecting member is as follows: the appearance is a rectangular structural plate, a column is provided in the middle, a bolt hole is provided in the center of the column, and wedge-shaped grooves are symmetrically provided on both sides of the column, and the grooves cooperate with the second connecting member;

[0007] The structure of the second connecting member is as follows: the left end is a rectangular plate with a hollow middle and approximately U-shaped grooves on both sides, one surface of the U-shaped groove is an inclined surface, which matches the wedge-shaped groove of the first connecting member, and the hollow part in the middle cooperates with the column of the first connecting member, and the column is just inserted into the hollow part; the right end is two horizontal plates arranged correspondingly in the upper and lower parts, and a through hole is provided in the middle, and the diameter of the through hole is 50mm, which is used to fix the scraper.

[0008] The wedge-shaped surfaces of the first connecting member and the second connecting member are matched together, and then the two are connected and pressed by connecting bolts and a pressing plate.

[0009] Furthermore, the inclination angles of the wedge-shaped groove of the first connecting member and the inclined surface of the U-shaped groove of the second connecting member are the same, which is 5°.

[0010] The use process of the above device is:

[0011] 1. Machining the first connecting piece and the second connecting piece in advance, and welding the first connecting piece to the side of the original buffer base according to the original scraper design;

[0012] 2. The second connecting member and the first connecting member have an inclined surface with an angle of 5°, and the wedge-shaped surfaces of the two are matched. The second connecting member is suspended on the upper part of the first connecting member, and its left inclined plate is inserted into the wedge-shaped groove of the first connecting member;

[0013] 3. Install the scraper along the upper and lower through holes of the two horizontal plates on the right side of the second connecting piece, adjust it to the appropriate position, place the pressure plate above the column of the first connecting piece, align the bolt holes of the two, install the pin and nut to tighten the second connecting piece to prevent it from loosening during use.

[0014] The utility model provides an oxygen lance scraper base connection device, which brings the following beneficial effects:

[0015] (1) Simple structure, low production cost, and easy to replace;

[0016] (2) The original furnace shutdown time for replacing the base was 10 hours, but with the utility model, it can be shortened to 3 hours.

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-view drawing of the first connecting member;

[0019] Figure 2 is a three-view drawing of the second connecting member;

[0020] Figure 3 It is a structural schematic diagram of the pressing plate;

[0021] Figure 4 for Figure 3 A top view of

[0022] Figure 5 It is the assembly drawing (partial section) of the oxygen lance scraper base connection device of the utility model;

[0023] Figure 6 for Figure 5 Right view of;

[0024] Figure 7 for Figure 5 Top view of the .

[0025] In the figure, 1 is the first connecting member, 2 is the second connecting member, 3 is the pressure plate, 4 is the pin shaft, 5 is the inclined surface, 6 is the original buffer base, 7 is the bolt hole, 8 is the horizontal plate, and 9 is the through hole. DETAILED DESCRIPTION Example

[0026] like Figures 1 to 7 As shown, an oxygen lance scraper base connecting device is arranged on the original buffer base 6, and includes a first connecting member 1, a second connecting member 2, and a pressing plate 3; after the first connecting member 1 and the second connecting member 2 are assembled and welded, the pressing plate 3 is placed on the upper part of the second connecting member 2, and the pressing plate is pressed against the bolt hole position of the first connecting member using a pin 4, and fixed with a nut, so that the first connecting member 1 and the second connecting member 2 are more closely matched.

[0027] The first connecting member and the second connecting member are both special-shaped members, such as Figure 1 As shown, the structure of the first connecting member is: the appearance is a rectangular structural plate, a column is provided in the middle, a bolt hole 7 is provided in the center of the column, and wedge-shaped grooves are symmetrically provided on both sides of the column (an inclined surface 5 is dug inside the rectangular structural plate), and the grooves cooperate with the second connecting member; Figure 2 As shown, the structure of the second connecting member is: the left end is a rectangular plate with a hollow middle and approximately U-shaped grooves on both sides, one surface of the U-shaped groove is an inclined surface, which matches the wedge-shaped groove of the first connecting member, and the hollow part in the middle cooperates with the column of the first connecting member, and the column is just inserted into the hollow part; the right end is two horizontal plates arranged correspondingly in the upper and lower parts, and a through hole is provided in the middle, and the diameter of the through hole is 50mm, which is used to fix the scraper.

[0028] The wedge-shaped surfaces of the first connecting member 1 and the second connecting member 2 are matched together, and then the two are connected and pressed by connecting bolts and a pressing plate 3 .

[0029] Furthermore, the inclined surfaces 5 of the wedge-shaped groove of the first connecting member and the U-shaped groove of the second connecting member have the same inclination angle of 5°.

[0030] The design and use process of the above device are as follows:

[0031] 1. Machining the first connecting piece and the second connecting piece in advance, and welding the first connecting piece to the side of the original buffer base according to the original scraper design;

[0032] like Figure 1As shown, the first connecting member has the appearance of a rectangular structural plate with a length of 400mm, a width of 65mm and a height of 285mm. A square column (length 65mm, width 50mm) is provided in the middle thereof, and a bolt hole is provided in the center of the column; an inclined plane is provided on both sides of the column along the top and downwardly, and the inclination of the inclined plane is 5°; a 20mm wide edge is left on the outside of the inclined plane, and the edge is welded to the original buffer base 6 as a whole.

[0033] like Figure 2 As shown, the second connecting member is divided into left and right parts: the left side is a rectangular plate with a hollow groove in the middle and approximately U-shaped grooves at the bottom of both sides of the hollow groove (length 400mm, height 310mm, 25mm higher than the first connecting member), one surface of the U-shaped groove is an inclined surface (as shown in the main view), the width of the U-shaped groove is 20.74mm, the depth is 285mm, the inclination angle of the inclined surface is 5°, which matches the wedge-shaped groove of the first connecting member, the width of the middle hollow part (as shown in the top view) is 56mm, which cooperates with the column of the first connecting member, and the column (width 50mm) is just inserted into the hollow part; the right end of the second connecting member is two horizontal plates arranged in upper and lower correspondence, the length of the horizontal plate 8 is consistent with the rectangular plate on the left, the width is 160mm, and the thickness is 30mm. A through hole 9 is provided in the middle of the horizontal plate 8, and the diameter of the through hole 9 is 50mm, which is used to fix the scraper.

[0034] 2. The inclination angle between the second connecting member and the inclined surface 5 of the first connecting member is 5°, and the wedge-shaped surfaces of the two are matched. The second connecting member 2 is suspended on the upper part of the first connecting member 1, and its left inclined plate is inserted into the wedge-shaped groove of the first connecting member 1;

[0035] 3. Install the scraper along the upper and lower through holes 9 of the two horizontal plates 8 on the right side of the second connecting piece, adjust them to a suitable position, place the pressing plate 3 above the column of the first connecting piece, align the bolt holes 7 of the two, install the pin shaft and nut to tighten the second connecting piece to prevent it from loosening during use.

Claims

1. An oxygen lance scraper base connection device, characterized in that: It includes a first connecting member, a second connecting member and a pressure plate; the first connecting member and the second connecting member are both special-shaped members. The first connecting member looks like a rectangular structural plate, with a column in the middle, a bolt hole in the center of the column, and wedge-shaped grooves symmetrically arranged on both sides of the column, which cooperate with the second connecting member; the structure of the second connecting member is as follows: the left end is a rectangular plate with a hollow middle and U-shaped grooves on both sides, one surface of the U-shaped groove is an inclined surface, which matches the wedge-shaped groove of the first connecting member, and the hollow part in the middle cooperates with the column of the first connecting member, and the column can be inserted into the hollow part; the right end is two horizontal plates arranged correspondingly up and down; the first connecting member and the second connecting member are connected in cooperation, the pressure plate is placed on the upper part of the second connecting member, and a pin is used to press the pressure plate and the bolt hole position of the first connecting member, so that the first connecting member and the second connecting member cooperate more closely; the first connecting member is welded to the original buffer base.

2. The oxygen lance scraper base connection device according to claim 1, characterized in that: The inclination angles of the wedge-shaped groove of the first connecting member and the inclined surfaces of the U-shaped groove of the second connecting member are the same, which is 5°.

3. The oxygen lance scraper base connection device according to claim 2, characterized in that: The first connecting part is a rectangular structural plate with a length of 400mm, a width of 65mm and a height of 285mm. The length of the middle column is 65mm and the width is 50mm. An inclined surface is arranged downward along the top on both sides of the column to form a wedge-shaped groove, and the inclination of the inclined surface is 5°; a 20mm wide edge is left on the outside of the inclined surface, and the edge is welded to the original buffer base as a whole.

4. The oxygen lance scraper base connection device according to claim 2, characterized in that: The inclined surfaces of the first connecting member and the second connecting member are matched together, and then the two are connected and pressed by a pin shaft and a pressing plate.

5. The oxygen lance scraper base connection device according to claim 1, characterized in that: The rectangular plate structure at the left end of the second connecting member is: 400mm in length and 310mm in height, which is 25mm higher than the first connecting member. One surface of its U-shaped groove is a slope. The width of the U-shaped groove is 20.74mm, the depth is 285mm, and the inclination angle of the slope is 5°, which matches the wedge-shaped groove of the first connecting member. The two horizontal plates at the right end of the second connecting member are 160mm in width and 30mm in thickness.

6. The oxygen lance scraper base connection device according to claim 5, characterized in that: A through hole is provided in the middle of the two horizontal plates. The diameter of the through hole is 50 mm and is used for fixing and connecting the scraper.

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