Electric furnace finger capable of prolonging service life

Abstract

An electric furnace finger capable of prolonging service life belongs to the technical field of electric furnace equipment and is used for prolonging the service life of the electric furnace finger. According to the technical scheme, the two sides of a bottom plate are each provided with four inserting bosses, the lower ends of two side plates are each provided with four inserting grooves, the inserting bosses of the bottom plate are connected with the inserting grooves of the side plates in an inserted mode and connected in a welded mode, and an upper water path plate, a middle water path plate, a lower water path plate and a root water path plate which are horizontal are arranged in an inner cavity of an electric furnace finger. The two sides of the upper waterway plate and the lower waterway plate are respectively welded with the inner side plate surfaces of the two side plates, the rear part of the upper waterway plate is bent upwards to be welded with the lower part of the shaft sleeve seat, the rear part of the lower waterway plate is bent upwards to be welded with the inner side plate surface of the upper plate, the rear end of the root waterway plate is welded with the rear part of the upper plate, and the front end of the root waterway plate is welded with the rear part of the shaft sleeve seat. The electric furnace finger solves the problem of water leakage of welding seams of the electric furnace finger, prolongs the service life of the electric furnace finger, reduces consumption of the electric furnace finger, and improves safety and stability of electric furnace production.

Description

Technical Field

[0001] The utility model relates to an electric furnace finger with a long service life, belonging to the technical field of electric furnace equipment. Background Art

[0002] Before melting scrap steel, the pit-type electric furnace will use the residual heat of steelmaking in the furnace to preheat the scrap steel to be melted, and then melt it after reaching the predetermined temperature to improve the melting efficiency. During preheating, the steel material is held above the molten steel by a workpiece with a finger-like structure. When adding materials, the scrap steel will be dropped down from the basket located about 10 meters above the fingers when the electric furnace is working. The fingers need to retract when adding materials to the molten steel in the furnace. There are a total of 34 fingers of different lengths inside the electric furnace for receiving materials. The theoretical design service life of the fingers is about 5,000 furnaces, but the actual service life is about 1,500 furnaces. The highest temperature of the fingers during operation is about 1,500°C. The temperature changes greatly during operation, and the working environment is extremely harsh. The structure of the electric furnace fingers currently in use is a simple welding connection. Due to the large temperature changes in the electric furnace fingers during operation, the thermal expansion and contraction of the finger components cause cracks in the welds, resulting in water leakage in the welds of the electric furnace fingers, which reduces the service life of the electric furnace fingers, increases the consumption of the electric furnace fingers, increases maintenance costs, and affects the safety and stability of electric furnace production, which urgently needs to be improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an electric furnace finger with a longer service life. The long electric furnace finger can solve the problem of water leakage in the weld of the current electric furnace finger during use, extend the service life of the electric furnace finger, reduce the consumption of the electric furnace finger, improve the safety and stability of the electric furnace production, and enhance the efficiency of the electric furnace smelting.

[0004] The technical solution to solve the above technical problems is:

[0005] The invention discloses an electric furnace finger capable of improving service life, comprising an upper plate, a side plate, a bottom plate, a lower sealing plate, a root sealing plate, and a shaft sleeve seat. The two sides of the upper plate are respectively connected to the upper ends of the two side plates, the lower ends of the two side plates are respectively connected to the bottom plate, the lower sealing plate and the root sealing plate, the plate surfaces of the two side plates are respectively provided with opposite shaft sleeve seats, and the rear parts of the plate surfaces of the side plates are respectively provided with water inlets and water outlets. The improvement is that the two sides of the bottom plate are respectively provided with four plug-in bosses, the four plug-in bosses are sequentially arranged along the length direction of the bottom plate, the lower ends of the two side plates are respectively provided with four plug-in grooves, the four plug-in grooves at the lower ends of the two side plates are respectively opposite to the four plug-in bosses on the two sides of the bottom plate, and the four plug-in bosses on the two sides of the bottom plate are respectively opposite to the four plug-in bosses on the two sides of the bottom plate. They are respectively inserted into the four plug-in slots at the lower ends of the two side panels and welded together. A horizontal upper waterway plate, middle waterway plate, lower waterway plate and root waterway plate are arranged in the inner cavity of the electric furnace finger. The upper waterway plate, middle waterway plate and lower waterway plate are arranged in sequence from top to bottom. The two sides of the upper waterway plate, middle waterway plate, lower waterway plate and root waterway plate are respectively welded to the inner plate surfaces of the two side panels. The rear part of the upper waterway plate is bent upward, and the bent upper end is welded to the lower part of the shaft sleeve seat. The rear part of the lower waterway plate is bent upward, and the bent upper end is welded to the inner plate surface of the upper plate. The rear end of the root waterway plate is welded to the rear of the upper plate, and the front end of the root waterway plate is welded to the rear of the shaft sleeve seat.

[0006] The above-mentioned electric furnace fingers capable of improving service life, the inner plate surface of the upper plate is processed with an upper plate groove, the upper plate groove has multiple sections, the multiple sections of the upper plate groove are arranged sequentially along the length direction of the upper plate, each section of the upper plate groove has multiple grooves arranged in parallel, the upper surface of the plate surface of the bottom plate is processed with a bottom plate groove, the bottom plate groove is along the length direction of the bottom plate, the bottom plate groove has multiple grooves arranged in parallel, and the groove length of the bottom plate groove matches the length of the bottom plate.

[0007] The electric furnace finger capable of improving service life, the upper waterway plate is a curved long plate, the plate surface of the upper waterway plate is divided into four parts: an upper flat plate, a lower flat plate, an arc plate, and a bent plate, the upper flat plate and the inner plate surface of the upper plate are close to parallel and have a gap, the lower flat plate and the inner plate surface of the bottom plate are close to parallel and have a gap, an arc plate is between the front ends of the upper and lower flat plates, the arc of the arc plate matches the arc of the front end of the finger, the distance between the arc plate and the inner wall of the front end of the finger cavity is not less than 20 mm, the bent plate is located at the rear end of the lower flat plate, and the upper end of the bent plate is vertically upward and welded to the lower part of the sleeve seat.

[0008] The beneficial effects of the utility model are:

[0009] The lower ends of the two side plates of the utility model are plugged and connected with the two sides of the bottom plate through plug-in grooves and plug-in bosses, and then welded, which significantly increases the stress concentration bearing capacity and avoids the cracking of the weld due to thermal expansion and contraction caused by high temperature; an upper waterway plate, an intermediate waterway plate, a lower waterway plate and a root waterway plate are arranged in the inner cavity of the electric furnace finger to form a five-layer circulating waterway, thereby improving the cooling water circulation efficiency inside the electric furnace finger; the upper plate grooves and the bottom plate grooves processed on the inner side plate surfaces of the upper plate and the bottom plate can increase the circulation efficiency of the circulating water, thereby improving the circulation efficiency and the cooling effect under the premise of ensuring the rigidity of the main structure.

[0010] The utility model discloses the ... BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view of the utility model;

[0012] Figure 2 yes Figure 1 A top view of

[0013] Figure 3 yes Figure 1 AA section view;

[0014] Figure 4 yes Figure 1 BB cross-sectional view;

[0015] Figure 5 yes Figure 2 CC section view;

[0016] Figure 6 is a front view of the upper plate;

[0017] Figure 7 yes Figure 6 DD cross-sectional view;

[0018] Figure 8 yes Figure 6 Bottom view of

[0019] Fig. 9 It is the front view of the side panel;

[0020] Fig.10 yes Fig. 9 EE cross-sectional view;

[0021] Fig.11 It is the front view of the base plate;

[0022] Fig.12 yes Fig.11 FF cross-sectional view;

[0023] Fig.13 yes Fig.11 A top view of

[0024] Fig.14 , 15 are the front view and top view of the lower cover plate;

[0025] Fig.16 , 17 are the front and side views of the root sealing plate;

[0026] Fig.18 , 19 It is the front view and side view of the sleeve seat;

[0027] Fig. 20 It is the front view of the upper waterway plate;

[0028] Fig.21 It is the front view of the sewer plate.

[0029] The markings in the figure are as follows: upper plate 1, side plate 2, bottom plate 3, lower sealing plate 4, root sealing plate 5, shaft sleeve seat 6, water inlet 7, water outlet 8, plug-in boss 9, plug-in groove 10, upper plate groove 11, bottom plate groove 12, upper waterway plate 13, middle waterway plate 14, lower waterway plate 15, root waterway plate 16, upper flat plate 17, lower flat plate 18, arc plate 19, bent plate 20. DETAILED DESCRIPTION

[0030] The utility model is composed of an upper plate 1, a side plate 2, a bottom plate 3, a lower sealing plate 4, a root sealing plate 5, a shaft sleeve seat 6, an upper waterway plate 13, a middle waterway plate 14, a lower waterway plate 15 and a root waterway plate 16.

[0031] Figure 1-5 It is shown that the two sides of the upper plate 1 are respectively connected to the upper ends of the two side plates 2, the lower ends of the two side plates 2 are respectively connected to the bottom plate 3, the lower sealing plate 4 and the root sealing plate 5, shaft sleeve seats 6 are respectively installed on the plate surfaces of the two side plates 2, and the rear part of the plate surfaces of the side plates 2 are respectively provided with water inlets 7 and water outlets 8, and these structures are the same as those of the existing electric furnace fingers.

[0032] Figure 1-5It is shown that the inner cavity of the electric furnace finger is provided with a horizontal upper waterway plate 13, an intermediate waterway plate 14, a lower waterway plate 15 and a root waterway plate 16. The upper waterway plate 13, the intermediate waterway plate 14, and the lower waterway plate 15 are arranged in order from top to bottom, and the two sides of the upper waterway plate 13, the intermediate waterway plate 14, the lower waterway plate 15, and the root waterway plate 16 are respectively welded to the inner side plate surface of the two side plates 2. The rear part of the upper waterway plate 13 is bent upward, and the upper end of the bend is welded to the lower part of the shaft sleeve seat 6. The rear part of the lower waterway plate 15 is bent upward, and the upper end of the bend is welded to the inner side plate surface of the upper plate 1. The rear end of the root waterway plate 16 is welded to the rear part of the upper plate 1, and the front end of the root waterway plate 16 is welded to the rear part of the shaft sleeve seat 6. The upper waterway plate 13, the middle waterway plate 14, the lower waterway plate 15 and the root waterway plate 16 arranged in the inner cavity of the electric furnace finger form a five-layer circulating waterway, which improves the cooling water circulation efficiency inside the electric furnace finger.

[0033] Figure 1 , 4 , 9, 10, 11, and 13 show that there are four plug-in bosses 9 on each side of the bottom plate 3, and the four plug-in bosses 9 are arranged in sequence along the length direction of the bottom plate 3. The lower ends of the two side plates 2 each have four plug-in slots 10, and the four plug-in slots 10 at the lower ends of the two side plates 2 are respectively opposite to the four plug-in bosses 9 on both sides of the bottom plate 3. The four plug-in bosses 9 on both sides of the bottom plate 3 are respectively inserted into the four plug-in slots 10 at the lower ends of the two side plates 2 and welded. The two side plates 2 are connected to the bottom plate 3 by plugging and then welded, which significantly increases the stress concentration bearing capacity, avoids the cracking of the weld caused by thermal expansion and contraction caused by high temperature, and solves the problem of water leakage in the electric furnace fingers.

[0034] Figure 6 , 7 As shown in FIG. 8 , an upper plate groove 11 is processed on the inner plate surface of the upper plate 1. The upper plate groove 11 has multiple sections. The multiple sections of the upper plate groove 11 are arranged sequentially along the length direction of the upper plate 1, and each section of the upper plate groove 11 has multiple grooves arranged in parallel.

[0035] Fig.11 , 12 13 shows that the upper surface of the bottom plate 3 is processed with a bottom plate groove 12, which is along the length direction of the bottom plate 3. There are multiple grooves arranged in parallel in the bottom plate groove 12, and the groove length of the bottom plate groove 12 matches the length of the bottom plate 3. The upper plate groove 11 and the bottom plate groove 12 processed on the inner surface of the upper plate 1 and the bottom plate 3 can increase the circulation efficiency of the circulating water, improve the circulation efficiency and improve the cooling effect under the premise of ensuring the rigidity of the main structure.

[0036] Figure 5 , 14As shown in Figure 15, the lower sealing plate 4 is a rectangular plate, and the two sides of the lower sealing plate 4 are respectively welded to the lower ends of the two side plates 2, and the two ends of the lower sealing plate 4 are respectively welded to the bottom plate 3 and the rear end and the front end of the root sealing plate 5.

[0037] Figure 5 , 16 As shown in Figure 17, the root sealing plate 5 is a rectangular plate bent at ninety degrees, and the two sides of the root sealing plate 5 are respectively welded to the lower ends of the two side plates 2, and the two ends of the root sealing plate 5 are respectively welded to the rear end of the lower sealing plate 4 and the rear end of the upper plate 1.

[0038] Figure 5 , 18 As shown in FIG. 19 , the rear portions of the two side plates 2 are provided with opposite axial holes, and the two ends of the shaft sleeve seat 6 are respectively embedded in the axial holes of the side plates 2 , and the two ends of the shaft sleeve seat 6 are connected to the axial holes of the side plates 2 by welding.

[0039] Figure 5 , 20 It is shown that the upper waterway plate 13 is a curved integral long plate, and the plate surface of the upper waterway plate 13 is divided into four parts: an upper flat plate 17, a lower flat plate 18, an arc plate 19, and a bent plate 20. The upper flat plate 17 is closely parallel to the inner plate surface of the upper plate 1 and there is a gap, the lower flat plate 15 is closely parallel to the inner plate surface of the bottom plate 3 and there is a gap, and the arc plate 19 is between the front ends of the upper flat plate 17 and the lower flat plate 18. The arc of the arc plate 19 matches the arc of the front end of the finger, and the distance between the arc plate 19 and the inner wall of the front end of the finger cavity is not less than 20 mm. The bent plate 20 is located at the rear end of the lower flat plate 18, and the upper end of the bent plate 20 is vertically upward and welded to the lower part of the sleeve seat 6.

[0040] Figure 5 , 21 It is shown that the lower waterway plate 15 is a rectangular plate, the rear portion of the lower waterway plate 15 is bent upward, and the bent upper end is welded to the inner plate surface of the upper plate 1.

[0041] The manufacturing and welding process of the utility model is as follows:

[0042] First, weld the side plate 2, the bottom plate 3, the lower sealing plate 4, and the shaft sleeve seat 6. The four plug-in bosses 9 on both sides of the bottom plate 3 are respectively inserted into the four plug-in slots 10 at the lower ends of the two side plates 2 and welded together. The internal fillet welds of the bottom plate 3 are completely welded to ensure the sealing of the overall structural parts.

[0043] Then weld the upper waterway plate 13. This time, only the inner cavity of the upper waterway plate 13 is welded. The distance between the arc plate 19 at the front end of the upper waterway plate 13 and the inner wall at the front end of the finger inner cavity is not less than 20 mm. Ensure the flow of circulating water at the fingertips of the electric furnace fingers to ensure the cooling effect. After welding, clean the weld and the dirt in the cavity before proceeding with the next assembly. Clean the weld each time you assemble to ensure that there is no residual residue.

[0044] Then weld the lower waterway plate 15;

[0045] Then weld the middle waterway plate 14 and the root waterway plate 16;

[0046] Finally, the upper plate 1 and the root sealing plate 5 are welded.

[0047] After all welding is completed, a sealing test is carried out with a test pressure of 1.3Mpa and the pressure is maintained for 40 minutes.

[0048] An embodiment of the present utility model is as follows:

[0049] The length of the upper plate 1 is 3040 mm, the width is 200 mm, and the thickness is 50 mm;

[0050] The length of the side panel 2 is 3175 mm, the width is 520 mm, and the thickness is 20 mm;

[0051] The length of the bottom plate 3 is 2144 mm, the width is 200 mm, and the thickness is 30 mm;

[0052] The length of the lower sealing plate 4 is 285 mm, the width is 200 mm, and the thickness is 50 mm;

[0053] The root sealing plate 5 has a length of 820 mm, a width of 200 mm and a thickness of 30 mm;

[0054] The outer diameter of the sleeve seat 6 is 260 mm and the length is 240 mm;

[0055] The diameter of the water inlet 7 is 75 mm;

[0056] The diameter of the water outlet 8 is 75 mm;

[0057] The length of the plug-in boss 9 is 467.5 mm and the width is 20 mm;

[0058] The length of the plug slot 10 is 470 mm and the width is 22 mm;

[0059] The width of the upper plate groove 11 is 32 mm and the depth is 16 mm;

[0060] The width of the bottom plate groove 12 is 32 mm and the depth is 16 mm;

[0061] The upper plate 17 of the upper waterway plate 13 has a length of 2470 mm, a width of 160 mm, and a thickness of 10 mm; the lower plate 18 has a length of 1967 mm, a width of 160 mm, and a thickness of 10 mm; the curved plate 19 has a length of 164 mm, a width of 160 mm, and a thickness of 10 mm; the bent plate 20 has a length of 960 mm, a width of 160 mm, and a thickness of 10 mm;

[0062] The length of the middle waterway plate 14 is 2523 mm, the width is 160 mm, and the thickness is 10 mm;

[0063] The length of the lower waterway plate 15 is 2900 mm, the width is 160 mm, and the thickness is 10 mm;

[0064] The root waterway plate 16 has a length of 170 mm, a width of 160 mm, and a thickness of 10 mm.

Claims

1. An electric furnace finger capable of improving service life, comprising an upper plate (1), a side plate (2), a bottom plate (3), a lower sealing plate (4), a root sealing plate (5), and a shaft sleeve seat (6), wherein both sides of the upper plate (1) are respectively connected to the upper ends of the two side plates (2), the lower ends of the two side plates (2) are respectively connected to the bottom plate (3), the lower sealing plate (4) and the root sealing plate (5), the plate surfaces of the two side plates (2) are respectively provided with opposite shaft sleeve seats (6), and the rear portions of the plate surfaces of the side plates (2) are respectively provided with a water inlet (7) and a water outlet (8), wherein: The bottom plate (3) has four plug-in bosses (9) on both sides, and the four plug-in bosses (9) are arranged in sequence along the length direction of the bottom plate (3). The lower ends of the two side plates (2) have four plug-in grooves (10), and the four plug-in grooves (10) at the lower ends of the two side plates (2) are respectively opposite to the four plug-in bosses (9) on both sides of the bottom plate (3). The four plug-in bosses (9) on both sides of the bottom plate (3) are respectively inserted into the four plug-in grooves (10) at the lower ends of the two side plates (2) and welded together. The inner cavity of the electric furnace finger is provided with a horizontal upper waterway plate (13), an intermediate waterway plate (14), a lower waterway plate (15) and a root waterway plate (16). The upper waterway plate The upper waterway plate (13), the middle waterway plate (14), and the lower waterway plate (15) are arranged in order from top to bottom. The upper waterway plate (13), the middle waterway plate (14), the lower waterway plate (15), and the root waterway plate (16) are respectively welded to the inner plate surfaces of the two side plates (2). The rear portion of the upper waterway plate (13) is bent upward, and the bent upper end is welded to the lower portion of the shaft sleeve seat (6). The rear portion of the lower waterway plate (15) is bent upward, and the bent upper end is welded to the inner plate surface of the upper plate (1). The rear end of the root waterway plate (16) is welded to the rear portion of the upper plate (1), and the front end of the root waterway plate (16) is welded to the rear portion of the shaft sleeve seat (6).

2. The electric furnace finger capable of increasing the service life according to claim 1, characterized in that: An upper plate groove (11) is machined on the inner plate surface of the upper plate (1), the upper plate groove (11) has multiple sections, the multiple sections of the upper plate groove (11) are sequentially arranged along the length direction of the upper plate (1), and each section of the upper plate groove (11) has multiple grooves arranged in parallel. A bottom plate groove (12) is machined on the upper plate surface of the bottom plate (3), the bottom plate groove (12) is along the length direction of the bottom plate (3), and the bottom plate groove (12) has multiple grooves arranged in parallel, and the groove length of the bottom plate groove (12) matches the length of the bottom plate (3).

3. The electric furnace finger capable of increasing the service life according to claim 1, characterized in that: The upper waterway plate (13) is a curved long plate. The plate surface of the upper waterway plate (13) is divided into four parts: an upper flat plate (17), a lower flat plate (18), an arc plate (19), and a bent plate (20). The upper flat plate (17) is parallel to the inner plate surface of the upper plate (1) and has a gap therebetween. The lower flat plate (18) is parallel to the inner plate surface of the bottom plate (3) and has a gap therebetween. The arc plate (19) is located between the front ends of the upper flat plate (17) and the lower flat plate (18). The arc of the arc plate (19) matches the arc of the front end of the finger. The distance between the arc plate (19) and the inner wall of the front end of the finger cavity is not less than 20 mm. The bent plate (20) is located at the rear end of the lower flat plate (18). The upper end of the bent plate (20) is vertically upward and welded to the lower part of the shaft sleeve seat (6).

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