A water-cooled protective screen for the heating furnace pipe

Abstract

The present invention discloses a water-cooled protective screen for ore-heating furnace slag pipes, comprising ore-heating furnace slag pipes and thick-walled stainless steel pipes, wherein the surface of the ore-heating furnace slag pipes is connected to a bottom ring via a supporting mechanism, and the surface of the bottom ring is connected to the thick-walled stainless steel pipe via a rotating assembly, and the inner cavity of the thick-walled stainless steel pipe is provided with a welding mechanism, and the supporting mechanism comprises a rotating disk. The present invention relates to the technical field of ferroalloy ore-heating furnaces. The water-cooled protective screen for ore-heating furnace slag pipes is driven by a starting cylinder to drive a rack to move, the rack drives a rotating gear to rotate, the rotating gear drives a rotating disk to rotate, the rotating disk drives a telescopic rod to slide toward the middle, and the telescopic rod drives a support plate to move toward the middle along the bottom of the ore-heating furnace slag pipes until the support plate is no longer in contact with the bottom ring and the thick-walled stainless steel pipe, so that the water-cooled protective screen can be removed downward as a whole. When the water-cooled protective screen is shut down for replacement and disassembly, it is not necessary to disassemble each small protective screen individually, thereby improving disassembly and transportation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of ferroalloy ore furnaces, in particular to a water-cooled protective screen for ore furnace row pipes. Background Art

[0002] The water-cooled protective screen is a special equipment used in ferroalloy ore furnaces. The size and number of protective screens are different for different furnace types. Several independent small protective screens form an overall circle, which can isolate the electrode copper tiles, pressure rings and other furnace equipment from dust and high-temperature heat radiation. Due to the long-term high-temperature magnetic field environment, the temperature in the furnace can reach 1000-1400℃ or above during smelting. When the furnace condition is abnormal and a spark occurs, especially when the water temperature of the protective screen in the furnace core suddenly rises, the gasification weld of the protective screen will burst. The protective screen is made of stainless steel plate with arc pressure welding; however, the existing water-cooled protective screen for ore furnace row pipes is still The following problems exist: 1. Due to the on-site space design reasons, the water-cooled protective screen of the electric arc furnace cannot be replaced and disassembled by mechanical handling and lifting, and can only be disassembled and transported by manpower. This method requires each small protective screen to be disassembled separately, resulting in low disassembly and transportation efficiency; 2. Most of them are formed by argon arc welding or double arc welding, with many welds and thin weld legs. Without heat treatment, the stress of the welded parts is not released. During use, the welds will crack and leak. If the welding is repaired, the furnace must be shut down for processing, which causes losses to production. For this reason, the present invention provides a water-cooled protective screen for the row pipes of the electric arc furnace. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a water-cooled protective screen for the smelting furnace bar pipes, which solves the problem that the water-cooled protective screen needs to be disassembled separately during shutdown, replacement and assembly, and the welds may crack and leak during use.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a water-cooled protective screen for an electric heating furnace pipe, comprising an electric heating furnace pipe and a thick-walled stainless steel pipe, the surface of the electric heating furnace pipe being connected to a bottom ring through a supporting mechanism, the surface of the bottom ring being connected to the thick-walled stainless steel pipe through a rotating assembly, the inner cavity of the thick-walled stainless steel pipe being provided with a welding mechanism, the supporting mechanism comprising a rotating disk, the bottom of the electric heating furnace pipe being fixedly connected to a cylinder, one end of the cylinder piston rod being fixedly connected to a push plate, a push groove being provided at the bottom of the electric heating furnace pipe, the surface of the push plate driving the rotating shaft to rotate through an engaging assembly, the bottom end of the rotating shaft being fixedly connected to the surface of the rotating disk, the surface of the rotating disk driving the telescopic rod to move through a sliding assembly, and one end of the telescopic rod being fixedly connected to the support plate.

[0005] Preferably, the engagement assembly includes a rotating gear, a rack is fixedly connected to the surface of the push plate, and one end of the rotating shaft is fixedly connected to the surface of the rotating gear.

[0006] Preferably, the sliding assembly includes a sliding bolt, the surface of which is fixedly connected to one end of the telescopic rod, a sliding groove is provided on the surface of the rotating disk, and the surface of the sliding bolt is slidably connected to the inner surface of the sliding groove.

[0007] Preferably, the rotating assembly includes a rotating ring, and the surfaces of the bottom ring and the rotating ring are both provided with rotating grooves, and the inner surface of the rotating groove is slidably connected with a rotating ball.

[0008] Preferably, the welding mechanism includes an S-shaped elbow, the surface of the S-shaped elbow is fixedly connected to the two ends of the thick-walled stainless steel pipe, the surface of the thick-walled stainless steel pipe is fixedly connected to a connector, the surface of the thick-walled stainless steel pipe is provided with an inlet and outlet pipe, and the surface of the S-shaped elbow is provided with a sealing assembly.

[0009] Preferably, the sealing assembly includes an upper sealing plate, a surface of the upper sealing plate is fixedly connected to the inner surface of the splayed elbow, and the inner surface of the splayed elbow is fixedly connected to the lower sealing plate.

[0010] Beneficial effects

[0011] The present invention provides a water-cooled protective screen for ore-fired furnace pipes. Compared with the prior art, it has the following advantages:

[0012] (1) The water-cooled protective screen of the ore-heating furnace row pipe is driven by the starting cylinder to move the rack, the rack drives the rotating gear to rotate, the rotating gear drives the rotating disk to rotate, the rotating disk drives the telescopic rod to slide toward the middle, and the telescopic rod drives the support plate to move toward the middle along the bottom of the ore-heating furnace row pipe until the support plate is no longer in contact with the bottom ring and the thick-walled stainless steel pipe, so that the water-cooled protective screen can be removed downward as a whole. When the water-cooled protective screen is stopped for replacement and disassembly, it is not necessary to disassemble each small protective screen separately, thereby improving the disassembly and transportation efficiency.

[0013] (2) The water-cooled protective screen for the smelting furnace tube is formed by welding the splayed elbows to the upper and lower ports of the thick-walled stainless steel pipe in the order of water inlet and return circulation, thereby forming a water flow channel. The connector is welded with stainless steel plates, and all welds are fully welded to form a water flow channel inside. After processing and manufacturing, it is welded together with the thick-walled stainless steel pipe, the splayed elbows, and the connector. The upper sealing plate and the lower sealing plate are pressed into an arc shape and welded to the inner side of the elbow. In this way, compared with the steel plate arc-pressed butt welding, the welds are reduced, the deformation is small, the structure and welding process are simple, the welding difficulty is reduced, and the welding efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front view structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the rotating disk of the present invention when viewed from above;

[0016] Figure 3 This is a schematic diagram of the push plate structure of the present invention when viewed from above;

[0017] Figure 4 This is a schematic cross-sectional view of the rotating ring of the present invention;

[0018] Figure 5 This is a schematic diagram of the front view structure of the thick-walled stainless steel tube of the present invention;

[0019] Figure 6 This is a schematic side view of the thick-walled stainless steel tube of the present invention;

[0020] Figure 7 It is a schematic diagram of the top view of the eight-shaped elbow of the present invention.

[0021] In the figure: 1-submerged arc furnace pipe, 2-thick-walled stainless steel pipe, 3-bottom ring, 4-support mechanism, 41-rotating disk, 42-cylinder, 43-pushing plate, 44-pushing groove, 45-rotating shaft, 46-telescopic rod, 47-support plate, 48-meshing assembly, 481-rotating gear, 482-rack, 49-sliding assembly, 491-sliding bolt, 492-sliding groove, 5-rotating assembly, 51-rotating ring, 52-rotating groove, 53-rotating bead, 6-welding mechanism, 61-eight-shaped elbow, 62-connector, 63-water inlet and outlet pipes, 64-sealing assembly, 641-upper sealing plate, 642-lower sealing plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-7 , the present invention provides two technical solutions:

[0024] Example 1

[0025] A water-cooled protective shield for a submerged arc furnace pipe comprises a submerged arc furnace pipe 1 and a thick-walled stainless steel pipe 2. The thick-walled stainless steel pipe 2 is a 1.5-inch thick-walled stainless steel pipe with a t=6mm thickness. The inner sides of the submerged arc furnace pipe 1 are intermittently welded using two-way welding. The welding length is 100mm, the welding current is 180-220A, and the voltage is 24-30V. The surface of the submerged arc furnace pipe 1 is connected to a bottom ring 3 through a support mechanism 4. The bottom ring 3 is sleeved on the surface of the submerged arc furnace pipe 1. The surface of the bottom ring 3 is connected to the thick-walled stainless steel pipe 2 through a rotating assembly 5. The inner cavity of the thick-walled stainless steel pipe 2 is provided with a welding mechanism 6. The rotating assembly 5 includes a rotating ring 51. The surface of the rotating ring 51 is fixedly connected to the bottom of the thick-walled stainless steel pipe 2. The surfaces of the bottom ring 3 and the rotating ring 51 are both provided with a rotating groove 52, and the inner surface of the rotating groove 52 is slidably connected to a rotating bead 53. The supporting mechanism 4 includes a rotating disk 41, and the bottom of the ore-heating furnace row pipe 1 is fixedly connected to a cylinder 42, and the cylinder 42 is electrically connected to an external power supply. One end of the piston rod of the cylinder 42 is fixedly connected to a push plate 43, and the surface of the push plate 43 is slidably connected to the inner surface of the push groove 44. The bottom of the ore-heating furnace row pipe 1 is provided with a push groove 44, and the surface of the push plate 43 drives the rotating shaft 45 to rotate through the meshing component 48. The top of the rotating shaft 45 is rotatably connected to the bottom of the ore-heating furnace row pipe 1, and the meshing component 48 includes a rotating gear 481. The surface of the push plate 43 is fixed The bottom end of the rotating shaft 45 is fixedly connected to the surface of the rotating disk 41, and the surface of the rotating disk 41 drives the telescopic rod 46 to move through the sliding component 49. The surface of the telescopic rod 46 is slidably connected to the outer surface of the ore heating furnace pipe 1. The sliding component 49 includes a sliding bolt 491. The surface of the sliding bolt 491 is fixedly connected to one end of the telescopic rod 46. The surface of the rotating disk 41 is provided with a sliding groove 492. The sliding groove 492 is arc-shaped. The surface of the sliding bolt 491 is slidably connected to the inner surface of the sliding groove 492. One end of the telescopic rod 46 The end is fixedly connected to a support plate 47, and the surface of the support plate 47 is slidably connected to the bottom of the ore-heating furnace row pipe 1. The bottom ring 3 is placed on the surface of the support plate 47. By starting the cylinder 42, the rack 482 is driven to move, and the rack 482 drives the rotating gear 481 to rotate, and the rotating gear 481 drives the rotating disk 41 to rotate. The rotating disk 41 drives the telescopic rod 46 to slide toward the middle, and the telescopic rod 46 drives the support plate 47 to move toward the middle along the bottom of the ore-heating furnace row pipe 1 until the support plate 47 is no longer in contact with the bottom ring 3 and the thick-walled stainless steel pipe 2, so that the water-cooled protective screen can be removed downward as a whole. When the water-cooled protective screen is shut down, replaced, and disassembled, there is no need to disassemble each small protective screen separately, which improves the disassembly and transportation efficiency.

[0026] Example 2

[0027] A water-cooled protective screen for a submerged arc furnace pipe comprises a submerged arc furnace pipe 1 and a thick-walled stainless steel pipe 2. The thick-walled stainless steel pipe 2 is a 1.5-inch thick-walled stainless steel pipe with a t=6mm thickness. The inner sides of the submerged arc furnace pipe 1 are intermittently welded using two-way welding. The welding length is 100mm, the welding current is 180-220A, and the voltage is 24-30V. The surface of the submerged arc furnace pipe 1 is connected to a bottom ring 3 through a supporting mechanism 4. The bottom ring 3 is sleeved on the surface of the submerged arc furnace pipe 1. The surface of the bottom ring 3 is connected to the thick-walled stainless steel pipe 2 through a rotating assembly 5. The inner cavity of the thick-walled stainless steel pipe 2 is provided with a welding mechanism 6. The rotating assembly 5 includes a rotating ring 51. The surface of the rotating ring 51 is fixedly connected to the bottom of the thick-walled stainless steel pipe 2. The surfaces of the bottom ring 3 and the rotating ring 51 are both provided with a rotating groove 52. , the inner surface of the rotating groove 52 is slidably connected with a rotating bead 53, the welding mechanism 6 includes an eight-shaped elbow 61, the eight-shaped elbow 61 is made of stainless steel and is welded to the upper and lower ports of the thick-walled stainless steel pipe in the order of water inlet and return circulation to form a water flow channel, the surface of the eight-shaped elbow 61 is fixedly connected to the two ends of the thick-walled stainless steel pipe 2, and the surface of the thick-walled stainless steel pipe 2 is fixedly connected with a connector 62, which is welded by stainless steel plates. All welds are fully welded, and a water flow channel is formed inside. The surface of the thick-walled stainless steel pipe 2 is provided with an inlet and outlet pipe 63. The surface of the eight-shaped elbow 61 is provided with a sealing assembly 64, which includes an upper sealing plate 641. The upper sealing plate 641 and the lower sealing plate 642 are pressed into an arc shape and welded on the inside of the elbow, which can both seal The seal can also play a role in strengthening the fixing of the drainage pipe. The surface of the upper sealing plate 641 is fixedly connected to the inner surface of the eight-shaped elbow 61. The inner surface of the eight-shaped elbow 61 is fixedly connected with the lower sealing plate 642. The eight-shaped elbow 61 is welded to the upper and lower ports of the thick-walled stainless steel pipe 2 in the order of water inlet and return circulation to form a water flow channel. The connector 62 is welded with stainless steel plates. All welds are fully welded to form a water flow channel inside. After processing and manufacturing, it is welded to the thick-walled stainless steel pipe 2, the eight-shaped elbow 61, and the connector 62 as a whole. The upper sealing plate 641 and the lower sealing plate 642 are pressed into an arc shape and welded to the inside of the elbow. This can reduce the weld seam and deformation compared to the steel plate arc butt welding form, and the structure and welding process are simple, which reduces the welding difficulty. The welding efficiency is improved. The supporting mechanism 4 includes a rotating disk 41. The bottom of the ore-heating furnace pipe 1 is fixedly connected to a cylinder 42. The cylinder 42 is electrically connected to an external power supply. One end of the piston rod of the cylinder 42 is fixedly connected to a push plate 43. The surface of the push plate 43 is slidably connected to the inner surface of the push groove 44. A push groove 44 is provided at the bottom of the ore-heating furnace pipe 1. The surface of the push plate 43 drives the rotating shaft 45 to rotate through the meshing component 48. The top of the rotating shaft 45 is rotatably connected to the bottom of the ore-heating furnace pipe 1. The meshing component 48 includes a rotating gear 481. The surface of the push plate 43 is fixedly connected to a rack 482. One end of the rotating shaft 45 is fixedly connected to the surface of the rotating gear 481. The surface of the rack 482 meshes with the surface of the rotating gear 481.The bottom end of the rotating shaft 45 is fixedly connected to the surface of the rotating disk 41, and the surface of the rotating disk 41 drives the telescopic rod 46 to move through the sliding assembly 49. The surface of the telescopic rod 46 is slidably connected to the outer surface of the ore heating furnace row pipe 1. The sliding assembly 49 includes a sliding bolt 491. The surface of the sliding bolt 491 is fixedly connected to one end of the telescopic rod 46. A sliding groove 492 is provided on the surface of the rotating disk 41. The sliding groove 492 is arc-shaped. The surface of the sliding bolt 491 is slidably connected to the inner surface of the sliding groove 492. One end of the telescopic rod 46 is fixedly connected to a support plate 47. The surface of the support plate 47 is connected to the outer surface of the ore heating furnace row pipe 1. The bottom of the ore body is connected to the bottom of the ore body, and the bottom ring 3 is placed on the surface of the support plate 47. By starting the cylinder 42, the rack 482 is driven to move, and the rack 482 drives the rotating gear 481 to rotate. The rotating gear 481 drives the rotating disk 41 to rotate. The rotating disk 41 drives the telescopic rod 46 to slide toward the middle. The telescopic rod 46 drives the support plate 47 to move toward the middle along the bottom of the ore body furnace pipe 1 until the support plate 47 is no longer in contact with the bottom ring 3 and the thick-walled stainless steel pipe 2. This allows the water-cooling protective screen to be removed as a whole. When the water-cooling protective screen is shut down for replacement and disassembly, there is no need to disassemble each small protective screen separately, which improves the efficiency of disassembly and transportation.

[0028] During the welding process of the protective screen body, the thick-walled pipes, elbows and connectors must be butt-jointed and spot-welded first. Welding can only be carried out after all positions are positioned. In order to prevent deformation during welding, the pipes are staggered and intermittently welded. During the welding process, the welding current and voltage are adjusted in time to avoid defects such as incomplete welding, slag inclusions, and sand holes. After all welding is completed, the welds are polished and polished for 30 minutes at 10kg / cm 2 During the pressure test, there shall be no leakage, seepage or water cross-contamination.

[0029] When in use, the thick-walled stainless steel pipes 2 are arranged in sequence according to the required diameters and angles, and the inner side is intermittently welded by two-way welding. The welding length is 100mm, the welding current is 180-220A, and the voltage is 24-30V. The eight-shaped elbow 61 is welded to the upper and lower ports of the thick-walled stainless steel pipe 2 in the order of inlet and return water circulation to form a water flow channel. The connector 62 is welded with stainless steel plates. All welds are fully welded to form a water flow channel inside. After processing and manufacturing, it is welded to the thick-walled stainless steel pipe 2, the eight-shaped elbow 61, and the connector 62 as a whole. The overall waterway is required to be unobstructed. In order to obtain a better sealing effect, the upper sealing plate 641 and the lower sealing plate 642 are pressed into an arc shape and welded to the inner side of the elbow, which can not only seal but also strengthen the fixed drainage pipe. The inlet and outlet pipes 63 are welded to the upper part of the protective screen according to the inlet and outlet positions. When welding the thick-walled stainless steel pipe 2, the rotation Ring 51, the rotating ring 51 drives the rotating ball 53 to slide along the inner surface of the rotating groove 52, and the rotating ring 51 drives the thick-walled stainless steel pipe 2 to rotate, and the position to be welded is rotated in front of the operator. When the furnace needs to be stopped to replace and disassemble the water-cooled protection screen, the cylinder 42 is started, and the cylinder 42 pushes the pushing plate 43 to move along the inner surface of the pushing groove 44, and the pushing plate 43 drives the rack 482 to move, and the rack 482 drives the rotating gear 481 to rotate, and the rotating gear 481 drives the rotating shaft 45 to rotate, and the rotating shaft 45 drives the rotating disk 41 to rotate, and the rotating disk 41 drives the sliding bolt 491 to move toward the middle through the sliding groove 492, and the sliding bolt 491 drives the telescopic rod 46 to slide toward the middle, and the telescopic rod 46 drives the support plate 47 to move toward the middle along the bottom of the ore-heating grate pipe 1 until the support plate 47 is no longer in contact with the bottom ring 3 and the thick-walled stainless steel pipe 2, and the water-cooled protection screen can be removed downward as a whole.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A water-cooled protective screen for a blast furnace pipe, comprising a blast furnace pipe (1) and a thick-walled stainless steel pipe (2), characterized in that: The surface of the ore-bearing furnace tube (1) is connected to a bottom ring (3) via a supporting mechanism (4); the surface of the bottom ring (3) is connected to a thick-walled stainless steel pipe (2) via a rotating assembly (5); and the inner cavity of the thick-walled stainless steel pipe (2) is provided with a welding mechanism (6); The support mechanism (4) includes a rotating disk (41), a cylinder (42) is fixedly connected to the bottom of the ore-heating furnace pipe (1), one end of the piston rod of the cylinder (42) is fixedly connected to a push plate (43), a push groove (44) is provided at the bottom of the ore-heating furnace pipe (1), the surface of the push plate (43) drives the rotating shaft (45) to rotate through an engagement assembly (48), the bottom end of the rotating shaft (45) is fixedly connected to the surface of the rotating disk (41), the surface of the rotating disk (41) drives the telescopic rod (46) to move through a sliding assembly (49), and one end of the telescopic rod (46) is fixedly connected to a support plate (47); The sliding assembly (49) includes a sliding bolt (491), the surface of the sliding bolt (491) is fixedly connected to one end of the telescopic rod (46), the surface of the rotating disk (41) is provided with a sliding groove (492), and the surface of the sliding bolt (491) is slidably connected to the inner surface of the sliding groove (492); The rotating assembly (5) comprises a rotating ring (51), the surfaces of the bottom ring (3) and the rotating ring (51) are both provided with a rotating groove (52), and the inner surface of the rotating groove (52) is slidably connected with a rotating ball (53); The welding mechanism (6) comprises an eight-shaped elbow (61), the surface of the eight-shaped elbow (61) is fixedly connected to both ends of the thick-walled stainless steel pipe (2), the surface of the thick-walled stainless steel pipe (2) is fixedly connected to a connector (62), the surface of the thick-walled stainless steel pipe (2) is provided with an inlet and outlet water pipe (63), and the surface of the eight-shaped elbow (61) is provided with a sealing component (64); The sealing assembly (64) comprises an upper sealing plate (641), the surface of the upper sealing plate (641) being fixedly connected to the inner surface of the splayed elbow (61), and the inner surface of the splayed elbow (61) being fixedly connected to a lower sealing plate (642).

2. The water-cooled protective screen for the ore-fired furnace pipe according to claim 1, characterized in that: The engagement assembly (48) includes a rotating gear (481), a rack (482) is fixedly connected to the surface of the push plate (43), and one end of the rotating shaft (45) is fixedly connected to the surface of the rotating gear (481).

3. The water-cooled protective screen for the ore-fired furnace pipe according to claim 1, characterized in that: The thick-walled stainless steel pipe (2) is a 1.5-inch thick-walled stainless steel pipe with a thickness of 6 mm, and the inner sides thereof are intermittently welded by double-protected welding.

4. The water-cooled protective screen for the ore-fired furnace pipe according to claim 1, characterized in that: The eight-shaped elbow (61) is made of stainless steel and is welded to the upper and lower ports of the thick-walled stainless steel pipe (2) in the order of water inlet and return circulation to form a water flow channel. The connector (62) is welded from stainless steel plates, and all welds are fully welded to form a water flow channel inside.

5. The water-cooled protective screen for the ore-fired furnace pipe according to claim 4, characterized in that: The thick-walled stainless steel pipe (2), the eight-shaped elbow (61) and the connector (62) are welded together to form a channel.

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