Refining equipment for special steel castings

Abstract

The invention discloses refining equipment for special steel castings. The refining equipment comprises a furnace cover arranged above a refining furnace body, and the furnace cover is installed on a supporting frame in a rotating and lifting mode; a cleaning assembly is further arranged on the inner side of the supporting frame and comprises a cleaning plate hinged to the bottom of the connecting frame and a first splicing plate detachably arranged on the side edge of the cleaning plate, and the connecting frame is movably arranged below the adjusting supporting mechanism. The adjusting supporting mechanism is connected with the supporting frame and controls the cleaning plate to move to the position below the furnace cover, and an adjusting mechanism is hinged between the cleaning plate and the connecting frame. The cleaning assembly is arranged and comprises the cleaning plate, the connecting frame and the adjusting mechanism, meanwhile, the cleaning plate is hinged to the connecting frame, in addition, the adjusting mechanism can control the cleaning plate to rotate around the shaft, and then the cleaning plate can be conveniently adjusted to be in a vertical or horizontal state according to needs; the cleaning plate extends into the inner side of the furnace cover and is supported to be in contact with the inner side wall of the furnace cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refining furnace cleaning, in particular to a refining equipment for special steel castings. BACKGROUND

[0002] In the refining process of special steel castings, the refining effect of molten steel and the stability of the equipment are crucial to the quality of steel and production efficiency. The existing refining furnace generally includes a furnace body and a furnace cover, and the inner side wall of the furnace cover is usually provided with an arc-shaped curved surface structure. The curved surface can utilize the flow guiding characteristics of the curved surface to make the splashed molten steel or slag slide along the arc surface, thereby reducing the accumulation of adhesion. Although the arc-shaped structure can reduce the accumulation of substances, in the refining process of special steel castings, the boiling phenomenon of molten steel caused by electric arc heating and vigorous stirring causes high-temperature molten steel containing alloy elements to splash into the inner side of the furnace cover in the form of droplets. At the same time, the oxides, sulfides and other impurities in the molten steel form volatile substances under the action of high temperature, and these gaseous substances quickly condense and adhere to the surface of the furnace cover when they cool down. The two interact with the floating slag and gradually accumulate on the inner surface of the furnace cover, forming a thin layer of slag steel. This phenomenon is common in various types of refining furnaces and has become a common problem that plagues the industry. When dealing with high-impurity molten steel containing more than 0.05% of phosphorus and sulfur, in order to achieve sufficient removal, the refining time needs to be extended and the stirring intensity needs to be increased, making the reaction in the furnace more intense. According to industry statistics, under this working condition, the average daily growth thickness of the slag steel layer can reach 3-5 millimeters; and in the continuous operation mode with frequent feeding, due to the fluctuation of molten steel and sudden temperature changes caused by each feeding, the thickness of the slag steel layer can even break through 2 centimeters within 48 hours. Actual measurement by a certain large special steel enterprise shows that the slag steel layer that is not cleaned in time can reduce the heat transfer efficiency of the furnace cover by 18%-22%, leading to a significant increase in energy consumption, and there is a safety hazard of slag steel layer falling off and damaging the furnace lining. In the production process of special steel castings, the existing refining equipment is subject to factors such as complex slag steel adhesion mechanism and strong physical adhesion, so even if conventional cleaning methods such as high-pressure water flushing and mechanical chiseling are used, it is still difficult to completely remove the slag steel accumulation on the furnace cover. Especially when smelting special steels containing high-melting-point alloy elements, the hardness of the slag steel after solidification increases significantly, causing irreversible wear to the refractory material of the furnace cover, resulting in an average reduction of 30%-40% in the service life of the furnace cover. In terms of equipment maintenance, the traditional disassembly process requires an operation amount of 8-12 people per hour, and the time for a single cleaning is as long as 4-6 hours, resulting in a cumulative downtime of more than 150 hours per year due to furnace cover maintenance, directly causing a loss of about 2000 tons of production capacity. SUMMARY

[0003] The purpose of the present application is to provide a refining equipment for special steel castings, aiming to improve the problem of impurities in the furnace cover of the refining furnace being difficult to clean.

[0004] The application is implemented as follows: a refining device for special steel casting, comprising a furnace cover arranged above a refining furnace body, the furnace cover being rotatably and liftably arranged on a support frame; a cleaning assembly is further arranged on the inner side of the support frame, the cleaning assembly comprising a cleaning plate hingedly arranged on the bottom of a connecting frame and a first splicing plate detachably arranged on the side of the cleaning plate, the connecting frame being movably arranged below an adjusting support mechanism, the adjusting support mechanism being connected with the support frame and controlling the cleaning plate to move below the furnace cover, an adjusting mechanism being hingedly arranged between the cleaning plate and the connecting frame, the adjusting mechanism controlling the cleaning plate to be attached to the inner arc surface of the furnace cover after being rotated.

[0005] As an embodiment of the application, the bottom of the two parallel triangular frame bodies of the connecting frame is provided with three second guide pipes, the three second guide pipes being located at the end of the triangular frame; an intermediate plate is hingedly arranged at the end of the cleaning plate, and three threaded rods installed on the intermediate plate are arranged through the three second guide pipes respectively.

[0006] As an embodiment of the application, the adjusting mechanism comprises a first telescopic cylinder, the first telescopic cylinder being obliquely and hingedly arranged on the bottom of the triangular frame body; a driving plate is vertically arranged below the cleaning plate and adjacent to the end of the triangular frame body, and the telescopic end of the first telescopic cylinder is hingedly connected with the bottom of the driving plate.

[0007] As an embodiment of the application, two second splicing plates connected by bolts are sleeved on the first telescopic cylinder, the two second splicing plates are each fixedly provided with an end pipe on the side away from each other, an inner pipe is sleeved on the end pipe by bolts, the inner pipe is connected through a bearing and arranged through a connecting plate, and the connecting plate is connected with the connecting frame.

[0008] As an embodiment of the application, a first insertion pipe and a threaded column are fixedly arranged on the bottom of the connecting frame, a second guide hole and a through hole are arranged on the end of the connecting plate, the first insertion pipe is arranged through the second guide hole, the threaded column is arranged through the through hole, and two nuts sleeved on the threaded column are distributed on the upper and lower sides of the connecting plate.

[0009] As an embodiment of the application, the connecting frame is arranged below a support frame supporting the adjusting support mechanism, a sliding block arranged on the top of the connecting frame is sleeved on a guide rail below the support frame, a threaded sleeve arranged on the top of the connecting frame is sleeved on a lead screw inside the support frame, the end of the lead screw is connected with the power output shaft of a second motor, and the second motor is arranged on the end of the support frame; the support frame is connected with the support frame.

[0010] As one embodiment of the present application, the bottom surface of the first splicing plate is flush with the bottom surface of the cleaning plate, and the top of the first splicing plate is spaced apart from the inner side wall of the furnace cover; the first splicing plate comprises a main plate, an end frame arranged at the end of the main plate, a top plate and a bottom plate arranged on the same side of the main plate, a detachable plate arranged at the end frame, a first clamping column and a second clamping column arranged at the edges of the top plate and the bottom plate respectively, and the first clamping column and the second clamping column are respectively arranged in the first clamping groove and the second clamping groove of the cleaning plate; in addition, the first splicing plate is supported on the bottom frame through bolts.

[0011] As one embodiment of the present application, the end frame and the detachable plate are arranged with a first sleeve and a second sleeve on the side wall away from the top plate, a blocking pipe is arranged through the first sleeve and the second sleeve opposite to each other, a plurality of blocking pipes are fixed on the same side of the moving pipe, and the moving pipe is connected to the end frame through bolts.

[0012] As one embodiment of the present application, a top shaft is fixedly arranged at the center of the top of the furnace cover, the top shaft is arranged through the end of the connecting frame through a bearing, and the sprocket at the top of the top shaft is connected to the sprocket of the first motor through a chain; the second insertion pipe fixedly arranged above the connecting frame is arranged through the first guide pipe of the support frame, and the third telescopic cylinder connected to the connecting frame is arranged on the support frame.

[0013] As one embodiment of the present application, heating electrodes and material pipes are arranged through a plurality of through holes of the furnace cover, the top of the heating electrodes and the material pipes is on the outside of the same top frame, and the clamping plate arranged on the top frame through bolts extrudes the heating electrodes and the material pipes; the inverted second telescopic cylinder is connected above the top frame, and the second telescopic cylinder is arranged on the support frame through a plate.

[0014] The present application has the following beneficial effects: 1. The present application provides a cleaning assembly, which comprises a cleaning plate, a connecting frame and an adjusting mechanism, and the cleaning plate is hingedly connected to the connecting frame. In addition, the adjusting mechanism can control the cleaning plate to rotate around the shaft, so that the cleaning plate can be adjusted to be in a vertical or horizontal state according to the requirements, thereby providing support for the cleaning plate to extend into the inside of the furnace cover and contact the inner side wall.

[0015] 2. The present application provides a top shaft arranged at the top of the furnace cover, and the top shaft is arranged through the connecting frame through a bearing. In addition, the top shaft is connected to the motor through a sprocket and a chain, so that the furnace cover can be controlled to rotate under the action of the motor. The rotating furnace cover cooperates with the cleaning plate to realize complete cleaning of the inner side wall of the furnace cover, thereby changing the current situation that the furnace cover is cleaned at intervals.

[0016] 3、The adjusting support mechanism is arranged, connected with the support frame, and connected with the connecting frame, so that the connecting frame drives the cleaning plate to approach or move away from the furnace cover under the action of the adjusting support mechanism, and the existence of the cleaning plate does not affect the lifting of the furnace cover. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings constituting a part of this application serve to provide further understanding of the application, so that other features, objects and characteristics of the application become more apparent. The illustrative embodiment drawings of the application and their descriptions serve to explain the application, and do not constitute undue limitation on the application.

[0018] Figure 1 is the first structural schematic diagram of the whole application; Figure 2 is the second structural schematic diagram of the whole application; Figure 3 is the third structural schematic diagram of the whole application; Figure 4 is the structural schematic diagram of the support frame of the application; Figure 5 is the structural schematic diagram of the cleaning assembly and the adjusting support mechanism of the application; Figure 6 is the structural schematic diagram of the adjusting support mechanism of the application; Figure 7 is the structural schematic diagram of the cleaning assembly of the application; Figure 8 is the structural schematic diagram of the connecting frame of the application; Figure 9 is the structural schematic diagram of the adjusting mechanism of the application; Figure 10 is the structural schematic diagram of the cleaning plate and the first splicing plate of the application; Figure 11 is the structural schematic diagram of the cleaning plate of the application; Figure 12 is the structural schematic diagram of the first splicing plate of the application; Figure 13 is the local structural schematic diagram of the first splicing plate of the application; Figure 14 is the structural schematic diagram of the furnace cover of the application; Figure 15 is the structural schematic diagram of the heating electrode of the application.

[0019] In the figure: support frame 1; refining furnace body 11; trolley 12; first guide pipe 13; first guide hole 14; cleaning assembly 2; cleaning plate 21; middle plate 211; threaded rod 212; first clamping groove 213; second clamping groove 214; bottom frame 215; driving plate 216; first splicing plate 22; main plate 221; top plate 222; bottom plate 223; first clamping column 224; second clamping column 225; end frame 226; first sleeve 2261; detachable plate 227; second sleeve 2271; blocking pipe 228; moving pipe 229; adjusting mechanism 23; connecting plate 231; second guide hole 232; inner pipe 233; second splicing plate 234; first telescopic cylinder 235; end pipe 236; connecting frame 24; triangular frame body 241; sliding block 242; threaded sleeve 243; first insertion pipe 244; threaded column 245; second guide pipe 246; heating electrode 3; top frame 31; plate 32; second telescopic cylinder 33; clamping plate 34; furnace cover 4; through hole 41; top shaft 42; connecting frame 43; first motor 44; second insertion pipe 45; third telescopic cylinder 46; adjusting support mechanism 5; support frame 51; guide rail 52; lead screw 53; connecting frame 54; fourth insertion pipe 55; clamping frame 56; fourth telescopic cylinder 57; second motor 58; material pipe 6. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0022] From the prior art, it can be known that the refining equipment for steel materials includes a furnace body system, a heating system, a stirring system, a material bin, a control system, etc.

[0023] The furnace body system comprises a furnace shell, a refractory lining and a supporting and tilting mechanism. The furnace shell is welded by 16-30mm thick Q345R steel plates, and the outer side is welded with I-shaped steel reinforcing bars. The diameter is designed to be 3-8 meters according to the furnace capacity. The furnace cover 4 is installed at the top opening of the furnace shell, and the bottom is supported by the trunnion supporting and tilting mechanism. The furnace cover 4 is lifted relative to the furnace shell. The refractory lining is located on the inner side of the furnace shell, which comprises a working layer and a permanent layer. The working layer can be set as magnesium-carbon bricks or magnesium-calcium bricks, with a thickness of 200-300mm, directly contacting with molten steel and slag, and having strong corrosion resistance. The permanent layer is set as light high-alumina bricks or refractory castable, with a thickness of 100-150mm, serving as heat preservation. The above-mentioned furnace body system can be placed on the trolley 12, and the transfer of the furnace body system is realized through the trolley 12.

[0024] The heating system can be set as an electric arc heating device, which is located in the center and top of the furnace cover. The electric arc heating device comprises a graphite electrode and a matching transformer. The graphite electrode is vertically inserted into the furnace from the center of the furnace cover, and the molten steel is heated by electric arc discharge. The graphite electrode is usually equipped with a lifting mechanism, such as a hydraulic drive telescopic cylinder, which is installed above the furnace cover to control the up and down movement of the electrode.

[0025] The stirring system can be set as an argon blowing stirring device, which is located in the center of the furnace bottom. The argon blowing stirring device comprises a gas permeable brick embedded in the working layer of the furnace bottom and an argon gas pipeline. The argon gas pipeline is led out from the furnace bottom and connected to a high-pressure argon gas cylinder. Argon gas forms bubbles through the gas permeable brick and pushes the molten steel to flow during the floating process.

[0026] The stock bin is located above the left / right side of the furnace body and stores ferrosilicon, ferromanganese, etc. The bottom is provided with a vibrating feeder and a screw conveyor. The stock bin is connected to the furnace cover charging port through a pipeline and uses gravity to discharge.

[0027] The control system comprises a PLC control cabinet, such as Siemens S7-400 or AB ControlLogix PLC, equipped with a 12-24 inch touch screen, which displays real-time temperature, power, vacuum degree and other parameters.

[0028] In the process of steel refining, although the inner side wall is set as an arc-shaped curved furnace cover 4, which can reduce the accumulation of impurities, but the floating slag gradually accumulates on the inner surface of the furnace cover, forming a slag-steel layer. However, it is difficult to completely remove the slag accumulation on the furnace cover 4 by using conventional cleaning methods such as high-pressure water flushing and mechanical chiseling.

[0029] In order to avoid the increase of the difficulty of cleaning the furnace cover 4 due to long-term accumulation, the present embodiment adds corresponding structures to the existing refining furnace to timely remove and process the slag accumulation on the furnace cover 4 after it is lifted away from the refining furnace body 11.

[0030] As Figures 1-3As shown, specifically, the cleaning assembly 2 is arranged inside the support frame 1 with the furnace cover 4 arranged thereon, the adjusting support mechanism 5 is arranged above the cleaning assembly 2, and the adjusting support mechanism 5 is adjustably connected with the support frame 1, so that the cleaning assembly 2 can be controlled to move relative to the furnace cover 4 under the action of the adjusting support mechanism 5. In this way, when the furnace cover 4 is lowered to be arranged on the refining furnace body 11, the cleaning assembly 2 can be separated from the area covered by the furnace cover 4. When a large gap is formed between the furnace cover 4 and the refining furnace body 11, the cleaning assembly 2 is controlled to move to the lower side of the furnace cover 4 to realize the cleaning of the furnace cover 4. In order to realize the overall cleaning of the furnace cover 4, the furnace cover 4 can be rotated under the action of an external force, and then the overall cleaning of the furnace cover 4 can be realized by the rotation of the furnace cover 4 when the cleaning assembly 2 is attached to the inner side wall of the furnace cover 4.

[0031] As shown in Figure 7 , in order to realize the cleaning of the furnace cover 4, the cleaning assembly 2 comprises a cleaning plate 21, a first splicing plate 22, an adjusting mechanism 23, a connecting frame 24 and the like.

[0032] As shown in Figure 8 , Figure 10 , the connecting frame 24 comprises two parallel triangular frame bodies 241, the top of the triangular frame body 241 is connected with the adjusting support mechanism 5, and three second guide pipes 246 are fixedly arranged at the bottom of the triangular frame body 241, and the three second guide pipes 246 are located at the end of the triangle. An intermediate plate 211 is hingedly arranged at the end of the cleaning plate 21, three threaded rods 212 installed on the intermediate plate 211 are arranged through the three second guide pipes 246 respectively, and two nuts sleeved on each threaded rod 212 are arranged on both sides of the second guide pipe 246, so that the intermediate plate 211 can be stably installed on the side of the triangular frame body 241 under the cooperation of the three threaded rods 212 and the second guide pipes 246.

[0033] As shown in Figure 9 , the adjusting mechanism 23 comprises a first telescopic cylinder 235, which is obliquely and hingedly arranged at the bottom of the triangular frame body 241 through a second splicing plate 234 and a connecting plate 231. A driving plate 216 is vertically arranged below the cleaning plate 21 and close to the end of the triangular frame body 241. The telescopic end of the first telescopic cylinder 235 is hingedly connected with the bottom of the driving plate 216, so that the cleaning plate 21 can be controlled to rotate around the shaft under the length adjustment of the first telescopic cylinder 235, so that the cleaning plate 21 is in a horizontal or vertical state. When the cleaning plate 21 is in a horizontal state, it is in contact with the inner side wall of the furnace cover 4 and rotates with the furnace cover 4, so that the cleaning of the furnace cover 4 can be realized.

[0034] As shown in Figure 9As shown, in order to stably install the first telescopic cylinder 235 on the triangular frame body 241, two second splicing plates 234 are connected by bolts, and the first telescopic cylinder 235 is sleeved in the space formed by the two second splicing plates 234. The side away from each other of the two second splicing plates 234 is fixedly provided with an end pipe 236, and an inner pipe 233 is sleeved on the end pipe 236 and connected by bolts. The inner pipe 233 is connected to the through connecting plate 231 through a bearing.

[0035] As shown in Figure 8 , Figure 9 , the connecting plate 231 is provided in an L-shaped structure, and a second guide hole 232 and a through hole are provided on the horizontal section of the connecting plate 231. A first insertion pipe 244 and a threaded column 245 are fixedly provided on the bottom of the connecting frame 24. The first insertion pipe 244 penetrates through the second guide hole 232, and the threaded column 245 penetrates through the through hole. This arrangement allows the connecting plate 231 to be stably installed on the connecting frame 24. In addition, at least two nuts are sleeved on the threaded column 245, and the two nuts are distributed on the upper and lower sides of the connecting plate 231. The cooperation of the nuts and the threaded column 245 can control the stable installation of the connecting plate 231 relative to the connecting frame 24.

[0036] As shown in Figure 11 , the bottom surface of the first splicing plate 22 is flush with the bottom surface of the cleaning plate 21, and the top of the first splicing plate 22 leaves a gap with the inner side wall of the furnace cover 4. Therefore, a material temporary storage space is formed between the first splicing plate 22 and the cleaning plate 21, which can receive the material separated from the inner side wall of the furnace cover 4, avoiding falling into the refining furnace body 11.

[0037] As shown in Figure 12 , specifically, the first splicing plate 22 includes a main plate 221, an end frame 226, a top plate 222, and a bottom plate 223. The length of the main plate 221 is equal to the length of the cleaning plate 21. The top plate 222 and the bottom plate 223 are arranged on the same side of the cleaning plate 21, and the length of the top plate 222 is less than the length of the bottom plate 223. The top plate 222 and the bottom plate 223 are connected to the end frame 226.

[0038] As shown in Figure 11 , Figure 12As shown in the drawings, in order to stably install the first splicing plate 22 on the side of the cleaning plate 21 and to detach the cleaning material according to the requirement, the first clamping groove 212 and the second clamping groove 214 are arranged on the side wall of the cleaning plate 21 near the first splicing plate 22, and the bottom frame 215 is arranged on the bottom of the cleaning plate 21. The first clamping column 224 and the second clamping column 225 are arranged on the edges of the top plate 222 and the bottom plate 223 respectively, and the first clamping column 224 and the second clamping column 225 are installed in the first clamping groove 212 and the second clamping groove 214 respectively. In addition, the first splicing plate 22 is connected and placed on the bottom frame 215 by bolts. This arrangement can realize the stable and detachable installation of the first splicing plate 22.

[0039] As shown in the drawings, Figure 12 In order to facilitate the cleaning of the material accumulated in the temporary storage space, the detachable plate 227 is arranged at the end frame 226. The detachable plate 227 is matched with the end frame 226, and when the material in the temporary storage space is cleaned, the end frame 226 is in a smooth state, which facilitates the output of the material under the action of gravity in the space composed of the first splicing plate 22 and the cleaning plate 21.

[0040] One edge of the detachable plate 227 is connected with the end frame 226 through a hinge or a hinge, and a telescopic cylinder is arranged between the end frame 226 and the detachable plate 227 according to the connection mode of the cleaning plate 21 and the triangular frame body 241. The rotation of the detachable plate 227 can be controlled under the action of the telescopic cylinder, and then the smoothness of the end frame 226 can be controlled.

[0041] As shown in the drawings, Figure 13 Or a plurality of first sleeve pipes 2261 and second sleeve pipes 2271 which are opposite to each other are arranged on the side wall of the end frame 226 and the detachable plate 227 away from the top plate 222, and a blocking pipe 228 is arranged at each opposite first sleeve pipe 2261 and second sleeve pipe 2271. A plurality of blocking pipes 228 are fixed on the same side of the moving pipe 229, and the moving pipe 229 is connected with the end frame 226 by bolts. When it is required to make the end frame 226 in a smooth state, the restriction of the moving pipe 229 is released, and the moving pipe 229 is pulled to control the movement of the plurality of blocking pipes 228, so that the detachable plate 227 can be removed to make the end frame 226 in a smooth state.

[0042] As shown in the drawings, Figure 6 , Figure 8As shown, in order to stably install the connecting frame 24 below the support adjusting mechanism 5 and control the connecting frame 24 to move the cleaning plate 21, the support adjusting mechanism 5 comprises a support frame 51, a lead screw 53, a second motor 58 and the like. The lead screw 53 is arranged at the inner side of the support frame 51, and the second motor 58 is installed at the end of the support frame 51, and the power output shaft of the second motor 58 is connected with the end of the lead screw 53. The connecting frame 24 is located directly below the support frame 51, and the sliding block 242 and the guide rail 52 are arranged on the side walls of the connecting frame 24 and the support frame 51 respectively, and the sliding block 242 is sleeved on the guide rail 52 to form a component similar to a linear guide rail, so that the connecting frame 24 is stably and movably installed below the support frame 51.

[0043] As shown in Figure 6 , Figure 8 , in addition, a threaded sleeve 243 is installed at the top of the connecting frame 24, and the threaded sleeve 243 is sleeved on the lead screw 53. In the case that the second motor 58 works, the rotation of the lead screw 53 can be controlled to adjust the position of the cleaning plate 21, thereby facilitating the approach or departure of the cleaning plate 21 from the furnace cover 4.

[0044] As shown in Figure 4 , Figure 6 , in order to stably install the support frame 51 on the support frame 1, a plurality of connecting frames 54 are arranged on the support frame 51 by bolts, and a fourth insertion pipe 55 is fixedly arranged above each connecting frame 54, and the fourth insertion pipe 55 penetrates the first guide hole 14 of the support frame 1. A fourth telescopic cylinder 57 is arranged above the support frame 1, and the bottom of the fourth telescopic cylinder 57 is connected with the support frame 51. Therefore, the support frame 51 is stably and movably installed through the cooperation of the fourth telescopic cylinder 57, the fourth insertion pipe 55 and the first guide hole 14, and the lifting of the support frame 51 and the cleaning plate 21 can be controlled through the operation of the fourth telescopic cylinder 57.

[0045] As shown in Figure 14 , in the case that the cleaning plate 21 is arranged, in order to control the rotation of the furnace cover 4, a top shaft 42 is fixedly arranged at the center of the top of the furnace cover 4, the top shaft 42 penetrates the end of the connecting frame 43 through bearing connection, and the sprocket at the top of the top shaft 42 is connected with the sprocket of the first motor 44 through a chain. In this way, when the first motor 44 works, the furnace cover 4 is forced to rotate, and then the cleaning of the inner side wall is completed in cooperation with the cleaning plate 21.

[0046] As shown in Figure 4 , Figure 14As shown, in order to stably install the connecting frame 43 on the support frame 1, a second insertion pipe 45 is fixedly arranged above the connecting frame 43 and penetrates the first guide pipe 13 of the support frame 1. A third telescopic cylinder 46 is arranged above the support frame 1, and the telescopic end of the third telescopic cylinder 46 is connected with the connecting frame 43. Therefore, the connecting frame 43 is stably and movably installed under the cooperation of the third telescopic cylinder 46, the second insertion pipe 45 and the first guide pipe 13, and the lifting of the furnace cover 4 can be controlled under the operation of the third telescopic cylinder 46.

[0047] As shown in the drawings, Figure 14 , Figure 15 In order to facilitate the heating electrode 3 to penetrate the furnace cover 4 and extend into the refining furnace body 11, and to facilitate the charging of refining materials into the refining furnace body, a plurality of through holes 41 are arranged on the furnace cover 4, and the heating electrode 3 and the material pipe 6 installed according to actual needs can penetrate the through holes 41 and extend into the refining furnace body 11. The heating electrode 3 is arranged as a graphite electrode, and the number thereof is determined according to needs and is connected with the matching equipment of the electric arc heating device. The material pipe 6 is connected with a material bin, so that the refining materials can be charged into the refining furnace body 11.

[0048] As shown in the drawings, Figure 15 The above describes that the graphite electrode is usually equipped with a lifting mechanism, which is briefly introduced here. In order to control the lifting of the heating electrode 3 and the material pipe 6, a top frame 31 is arranged between the heating electrode 3 and the material pipe 6, a plurality of clamping plates 34 are arranged on the outer side of the top frame 31 and connected by bolts, and the top of the heating electrode 3 and the material pipe 6 is inserted into the space formed by the top frame 31 and the clamping plates 34, so that the heating electrode 3 and the material pipe 6 can be stably installed. An inverted second telescopic cylinder 33 is connected above the top frame 31, and the second telescopic cylinder 33 is installed on the support frame 1 through a plate 32.

[0049] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person having ordinary skill in the art can realize it, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0050] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A refining apparatus for special steel castings, characterized by, The utility model provides a kind of refining furnace cover cleaning device, including the furnace cover (4) being arranged above refining furnace body (11), the furnace cover (4) is rotatory and lift installation on support frame (1);Cleaning assembly (2) is further provided on the inside of the support frame (1), the cleaning assembly (2) includes hinge arrangement cleaning plate (21) on the bottom of connecting frame (24) and detachable first splicing plate (22) arranged in the side of cleaning plate (21), the connecting frame (24) is movably arranged below adjusting support mechanism (5), the adjusting support mechanism (5) is connected with support frame (1) and control cleaning plate (21) moves to the below of furnace cover (4), adjusting mechanism (23) is hingedly arranged between the cleaning plate (21) and connecting frame (24), the adjusting mechanism (23) controls cleaning plate (21) to be pasted after rotating the inner arc surface of furnace cover (4) arrangement.

2. A refining apparatus for special steel castings according to claim 1, characterized in that, The bottom of the two parallel triangular frame (241) of the connecting frame (24) is provided with three second guide pipes (246), and the three second guide pipes (246) are located at the end of the triangle;An intermediate plate (211) is hingedly arranged at the end of the cleaning plate (21), and three threaded rods (212) mounted on the intermediate plate (211) are arranged through the three second guide pipes (246) respectively.

3. A refining apparatus for special steel castings according to claim 2, wherein The adjusting mechanism (23) includes a first telescopic cylinder (235), which is inclined and hingedly connected to the bottom of the triangular frame (241). A driving plate (216) is vertically installed below the cleaning plate (21) near the end of the triangular frame (241). The telescopic end of the first telescopic cylinder (235) is hingedly connected to the bottom of the driving plate (216).

4. A refining apparatus for special steel castings according to claim 3, wherein Two second splicing plates (234) are sleeved on the first telescopic cylinder (235) and connected by bolts. The side of the two second splicing plates (234) away from each other is fixedly provided with an end pipe (236). An inner pipe (233) is sleeved on the end pipe (236) and connected by bolts. The inner pipe (233) is connected through a bearing and penetrates a connecting plate (231). The connecting plate (231) is connected to the connecting frame (24).

5. A refining apparatus for special steel castings according to claim 4, wherein A first insertion pipe (244) and a threaded column (245) are fixedly arranged at the bottom of the connecting frame (24). A second guide hole (232) and a perforation are arranged at the end of the connecting plate (231). The first insertion pipe (244) penetrates the second guide hole (232). The threaded column (245) penetrates the perforation. Two nuts sleeved on the threaded column (245) are distributed on the upper and lower sides of the connecting plate (231).

6. A refining apparatus for special steel castings according to claim 5, wherein The connecting frame (24) is arranged below the support frame (51) of the support adjusting mechanism (23), the sliding block (242) arranged on the top of the connecting frame (24) is sleeved on the guide rail (52) below the support frame (51), and the threaded sleeve (243) arranged on the top of the connecting frame (24) is sleeved on the lead screw (53) inside the support frame (51), the end of the lead screw (53) is connected with the power output shaft of the second motor (58), and the second motor (58) is arranged on the end of the support frame (51); the support frame (51) is connected with the support frame (1).

7. A refining apparatus for special steel casting according to claim 1, wherein The bottom surface of the first splicing plate (22) is flush with the bottom surface of the cleaning plate (21), and the top of the first splicing plate (22) is spaced apart from the inner side wall of the furnace cover (4); the first splicing plate (22) comprises a main plate (221), an end frame (226) arranged at the end of the main plate (221), a top plate (222) and a bottom plate (223) arranged on the same side of the main plate (221) in an up-down manner, and a detachable plate (227) arranged at the end frame (226); first clamping columns (224) and second clamping columns (225) are arranged at the edges of the top plate (222) and the bottom plate (223) respectively, and the first clamping columns (224) and the second clamping columns (225) are arranged in the first clamping grooves (213) and the second clamping grooves (214) of the cleaning plate (21) respectively; in addition, the first splicing plate (22) is connected by bolts and is supported on the bottom frame (215), and the bottom frame (215) is located at the bottom of the cleaning plate (21).

8. A refining apparatus for special steel castings according to claim 7, wherein The end frame (226) and the detachable plate (227) are arranged on the side walls away from the top plate (222) and are provided with first sleeve pipes (2261) and second sleeve pipes (2271), the first sleeve pipes (2261) and the second sleeve pipes (2271) opposite to each other are provided with stop pipes (228) penetrating through, a plurality of stop pipes (228) are fixed on the same side of the moving pipe (229), and the moving pipe (229) is connected with the end frame (226) by bolts.

9. A refining apparatus for special steel casting according to claim 1, wherein A top shaft (42) is fixedly arranged at the center of the top of the furnace cover (4), the top shaft (42) is connected with the end of the connecting frame (43) penetrating through by a bearing, and the chain wheel at the top of the top shaft (42) is connected with the chain wheel of the first motor (44) by a chain; the second insertion pipe (45) fixedly arranged above the connecting frame (43) penetrates through the first guide pipe (13) of the support frame (1), and the telescopic end of the third telescopic cylinder (46) arranged on the support frame (1) is connected with the connecting frame (43).

10. A refining apparatus for special steel castings according to claim 9, wherein The heating electrode (3) and the material pipe (6) are arranged penetrating through the plurality of through holes (41) of the furnace cover (4), the top of the heating electrode (3) and the material pipe (6) is located outside the same top frame (31), and the clamping plate (34) arranged on the top frame (31) by bolts extrudes the heating electrode (3) and the material pipe (6); the inverted second telescopic cylinder (33) is connected above the top frame (31), and the second telescopic cylinder (33) is arranged on the support frame (1) by the plate (32).

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