Manufacturing device for double-liquid composite casting of large wear-resistant lining plate and using method of manufacturing device

Abstract

The invention discloses a manufacturing device for a double-liquid composite casting large wear-resisting lining plate. The manufacturing device comprises a ground fixing support with a guide rail arranged on the upper surface. The cylindrical sand box is arranged on the ground fixing support, a vertical parting evanescent mode model is arranged in the cylindrical sand box, and a metal partition plate is vertically arranged in the middle of the cylindrical sand box; the movable bracket is arranged on the guide rail and can be close to or far away from the cylindrical sand box under the action of the driving mechanism; the medium-frequency induction heater is arranged on the movable support and comprises a coil support, a heating coil and a connecting plate, and the support is in a cylinder shape with an upper opening and a lower opening; the heating coil is insulated from the coil bracket and is arranged in the coil bracket along the side wall of the coil bracket; the connecting plate is arranged on the side, close to the movable support, of the coil support, the projection of the connecting plate and the projection of the movable support on the horizontal plane partially coincide, a first fixing hole is correspondingly formed in the coincident position, a first lead screw penetrates through the hole, and the first motor is connected with the lead screw, so that the first motor can rotate to drive the medium-frequency induction heater to move up and down.

Description

Technical Field

[0001] The present invention relates to the technical field of casting equipment, and particularly to a manufacturing device and a using method for a large-sized wear-resistant lining plate by double-fluid composite casting. Background Art

[0002] As an important equipment for grinding materials, large-sized ball mills are widely used in various industrial fields that require large-scale continuous production, such as the mining field, the metallurgical industry, environmental protection and resource recovery, the cement and building materials industry, and other fields. In a ball mill, according to the different positions where the lining plates are used, they can be divided into: cylinder lining plates, mill head lining plates, mill door lining plates, etc., which play the roles of protecting the cylinder body, dispersing grinding media and materials, and improving the grinding efficiency. According to the lining plate materials, they can be divided into: metal-based material lining plates, rubber material lining plates, stone or cast stone material lining plates, composite material lining plates, etc.

[0003] At present, most of the ball mill lining plates are made of metal-based materials, and a small amount are made of non-metallic materials. Due to the different motion states of the grinding media in each bin, in order to meet the requirements of this working state, the lining plate materials for each bin are different. In the crushing bin, the grinding media mainly act by impact, and it is required that the lining plate should have impact resistance and wear resistance. Generally, high manganese steel (ZGMn13) is used as the lining plate material. It has a certain impact toughness, and when it is subjected to a certain impact, cold working hardening occurs on its surface, making the surface hard and wear-resistant. Generally, the hardness is HB300 - 350, and the toughness is quite high, and the impact value can reach 700 Nm / cm. 2, but in use, it is prone to premature reverse convex bending deformation, pulling and breaking the fixing bolts, causing the lining plate to fall off, reducing its service life. Generally, the average service life is 5000 - 6000h. High-chromium cast iron has high hardness and good wear resistance, ranking first among wear-resistant materials. High-chromium cast iron is a brittle material. After appropriate treatment, it can be made into the lining plate of the rough grinding bin. High-chromium cast iron is used in working conditions with less impact, such as the lining plate of coal mills and the lining plate (wear-resistant plate) of crushers, etc. Its wear resistance is 6 - 8 times higher than that of high manganese steel, and the economic benefits are very significant. It is not suitable to use high-chromium cast iron for complex structures and large thin-walled parts on the mill, such as the partition grate plate and the grinding head lining plate, etc. Now, there are various grades of high-chromium cast iron, which are generally widely used in the cement industry. In order to improve the toughness of wear-resistant materials, materials such as high-chromium cast steel have emerged. At present, low-chromium cast iron, 42SiMnCrMo steel, low-carbon SiMn wear-resistant alloy steel, low-alloy high-strength steel (ZG35SiMn and ZG30CrMnSiMoRe), etc. can also be selected as wear-resistant materials. In the fine grinding bin, the grinding body mainly grinds, so it is required that the lining plate has good wear resistance. Wear-resistant white cast iron, chilled cast iron, medium manganese rare earth ductile iron, etc. can be selected. Compared with the high manganese steel lining plate, the advantages of the rubber lining plate are: light weight, reducing the labor intensity of installing the lining plate and shortening the maintenance time; light load, reducing power consumption, generally reducing about 10%; long service life, improving the operating rate of the mill; reducing the consumption of grinding media by more than 20%; protecting the cylinder body from slurry wear and extending the service life of the cylinder body; low industrial noise, improving the operating conditions and being beneficial to the health of workers. Its disadvantages are: not resistant to high temperature; not suitable for use in dry grinding; its impact resistance is not ideal when used in the first bin of wet ball mills. There is also a kind of lining plate made of diabase cast stone material. Some cement plants have used it in the last bin of the mill and carried out industrial tests on the inlaid lining plate. The test results show that it is completely feasible to use it in the steel forging bin of tube mills. Its service life is more than twice that of the self-poured white cast iron lining plate, and the cost is more than half lower than that of white cast iron. However, the inlay technology of cast stone lining plates and the casting quality of cast stone itself still need to be further studied and improved.

[0004] Large ball mill liners still mainly use single wear-resistant materials, such as high manganese steel or various alloy steel materials. Some bimetallic composite liners have been applied in small ball mills. Due to the low strength and easy rheology of high manganese steel materials, they are less and less used in actual applications. Traditional alloy steel liners are difficult to achieve an effective balance between wear resistance and impact resistance due to insufficient material toughness. The double-fluid bimetallic composite liner improves its performance through the composite of heterogeneous materials, but is limited by the inherent defects of the casting process (such as poor stability of the bonding layer, easy cracking at the interface, etc.). At present, it is impossible to manufacture a double-fluid composite casting large wear-resistant liner for large ball mills with better stability. During the cooling process of large castings, due to their large volume and slow cooling rate, large thermal stresses are likely to be generated. The shrinkage rates of the two metals are different, which may lead to large residual stresses at the interface, thus causing cracking. While small castings have a fast cooling rate and may have smaller residual stresses and a more stable bonding layer. Therefore, there is an urgent need to design a device for manufacturing double-fluid composite casting large wear-resistant liners.

[0005] The disclosure of the above background technical content is only used to assist in understanding the concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0006] The purpose of the present invention is to propose a manufacturing device and its usage method for double-fluid composite casting large wear-resistant liners, so as to solve the technical problems such as poor stability of the bonding layer and easy cracking at the interface of the wear-resistant liners for large ball mills existing in the above prior art.

[0007] To this end, the present invention proposes a manufacturing device for double-fluid composite casting large wear-resistant liners, including a ground-fixed bracket, on the upper surface of which there are several guide rails;

[0008] A cylindrical sand box, which is arranged on the ground-fixed bracket. A lost foam pattern with a vertical parting surface is arranged inside the cylindrical sand box. A metal partition is vertically arranged in the middle of the lost foam pattern, and molten alloy steel and high chromium cast iron liquids can be respectively injected into the lost foam cavity from the left and right sides of the metal partition;

[0009] A moving bracket, which is arranged on the guide rails. Under the action of a driving mechanism, the moving bracket can approach or move away from the cylindrical sand box;

[0010] The intermediate frequency induction heater is arranged on the moving support and includes a coil support, a heating coil and a connecting plate. The coil support is in the shape of a cylindrical tube with openings at both the top and bottom. The heating coil is insulated from the coil support and is arranged inside the coil support along the side wall of the coil support in a surrounding manner. There is a first space for accommodating the cylindrical sand box in the middle of the surrounding heating coil. The connecting plate is horizontally arranged on one side of the coil support close to the moving support. The projection of the connecting plate and the moving support on the horizontal plane partially overlap, and first fixing holes are correspondingly arranged at the overlapping positions. A first lead screw is arranged through the first fixing holes, and a first motor is connected to the first lead screw so that the rotation of the first motor can drive the intermediate frequency induction heater to move up and down.

[0011] Preferably, the metal partition is made of Q234 steel plate and is arranged along the thickness direction of the lost foam model, and the distance from the lining plate installation surface is one-third of the thickness of the lost foam model.

[0012] Preferably, a vacuum negative pressure pumping device is further included, which includes a vacuum pump, a cooling water circulation device and a control device. A number of mutually connected negative pressure pipes are arranged along the inner wall and bottom of the cylindrical sand box. The negative pressure pipes are symmetrically distributed, mutually connected and concentrated into a total channel. A negative pressure pipe interface communicated with the total channel is arranged outside the cylindrical sand box, so that the negative pressure pipe interface is connected with the vacuum pump to pump negative pressure for the cylindrical sand box.

[0013] Preferably, the moving support includes a horizontal frame and a vertical frame, which are welded by a number of steel plates. The horizontal frame and the vertical frame are combined into an "L" shape. The horizontal frame includes a front beam, a rear beam and a left beam. The vertical frame includes an upper beam, a lower beam, a front vertical beam and a rear vertical beam. Two guide rails are arranged on the ground fixing support at the positions corresponding to the front beam and the rear beam of the horizontal frame.

[0014] Preferably, two second fixing holes are correspondingly arranged on the upper beam and the connecting plate. The second fixing holes are symmetrically arranged on both sides of the first fixing holes and are on the same straight line as the first fixing holes. A smooth rod is arranged in the second fixing holes. The lower end of the smooth rod is fixed on the connecting plate, and the upper end passes through the second fixing holes of the upper beam.

[0015] Preferably, a counterweight is arranged on the connecting plate away from the intermediate frequency induction heater.

[0016] Preferably, the driving mechanism includes a second motor and a second lead screw. A fixed support cross beam is arranged on one side of the ground fixing support away from the cylindrical sand box. The second motor is arranged on the fixed support cross beam. The second lead screw is horizontally arranged and is connected to the second motor through a coupling. The right end of the second lead screw is fixedly arranged at the lower end of the moving support.

[0017] Preferably, it further includes a control cabinet for controlling the heating of the intermediate frequency induction heater and the movements of the first motor and the second motor.

[0018] Preferably, the intermediate frequency induction heater further includes an insulating board vertically arranged on the inner side wall of the coil bracket, and the heating coil passes through the insulating board and is wound around inside the coil bracket.

[0019] The present invention also provides a method for using a manufacturing device for a double-fluid composite casting large wear-resistant lining plate, including the following steps:

[0020] (1) Place the lost foam pattern into the cylindrical sand box, then fill with sand, vibrate to compact, and evacuate.

[0021] (2) Simultaneously inject the melted alloy steel and high chromium cast iron liquids from the left and right sides of the metal partition into the cavity of the lost foam pattern.

[0022] (3) Start the first motor and the second motor to move the intermediate frequency induction heater to the extreme position.

[0023] (4) Start the intermediate frequency induction heater, heat and maintain the temperature for several minutes.

[0024] (5) Stop heating and move the intermediate frequency induction heater outside the cylindrical sand box.

[0025] (6) After the casting cools to below 300 °C, take out the casting from the cylindrical sand box and clean it.

[0026] The beneficial effects of the present invention compared with the prior art include: This device is used for manufacturing a double-fluid composite casting large wear-resistant lining plate, that is, using two liquids to cast a large wear-resistant lining plate. It is provided with a metal partition in the middle of the lost foam pattern, which can effectively prevent the mutual penetration of the metal liquids on both sides during the pouring process and affect the quality of the casting; adopting the vertical pouring method, simultaneously injecting the melted alloy steel and high chromium cast iron liquids from the left and right sides of the metal partition into the cavity of the lost foam pattern, which effectively avoids the problem of poor bonding of the bonding layer caused by the oxidation of the metal liquid surface; after pouring, under the action of the driving mechanism, the intermediate frequency induction heater is pushed directly above the cylindrical sand box, and under the action of the first motor, the intermediate frequency induction heater is moved downward until the height of the heating coil matches the height of the lost foam pattern (including the riser part of the lost foam pattern), and then start heating and maintain the temperature for 3 - 10 minutes (the specific heating time is determined according to the size of the lining plate), so that the double-layer metal liquid can be fully melted and combined with the metal partition, avoiding the phenomenon of poor fusion in each area caused by uneven heat, resulting in an unstable bonding layer or even cracking. Description of the Drawings

[0027] Figure 1It is the first schematic diagram of the specific implementation manner of the present invention.

[0028] Figure 2 It is the second schematic diagram of the specific implementation manner of the present invention.

[0029] Figure 3 It is the left view of the specific implementation manner of the present invention.

[0030] Figure 4 It is the first top view of the specific implementation manner of the present invention.

[0031] Figure 5 It is the third schematic diagram of the specific implementation manner of the present invention.

[0032] Figure 6 It is the second top view of the specific implementation manner of the present invention.

[0033] Figure 7 It is the enlarged schematic diagram at position A of the first schematic diagram of the specific implementation manner of the present invention.

[0034] Figure 8 It is the schematic diagram of the cylindrical sand box of the specific implementation manner of the present invention.

[0035] Figure 9 It is the schematic diagram of the lost foam pattern (provided with a metal partition) of the specific implementation manner of the present invention.

[0036] Figure 10 It is the schematic diagram of the intermediate frequency induction heater (provided with a counterweight) of the specific implementation manner of the present invention.

[0037] Figure 11 It is the top view of the intermediate frequency induction heater (provided with a counterweight) of the specific implementation manner of the present invention.

[0038] Figure 12 It is the connection schematic diagram of the guide rail and the ball bearing in the specific implementation manner of the present invention.

[0039] Figure 13 It is the schematic diagram of the ground fixing bracket in the specific implementation manner of the present invention.

[0040] Description of the reference numerals: 01 - Ground fixing bracket; 011 - Boss; 02 - Guide rail; 021 - Ball bearing; 03 - Cylindrical sand box; 31 - Negative pressure pipe; 32 - Negative pressure pipe interface; 33 - Lifting lug; 04 - Evaporative pattern model; 41 - Gating system; 42 - Riser; 43 - Liner mounting surface; 05 - Metal partition; 06 - Moving bracket; 61 - Horizontal frame; 611 - Front beam; 612 - Rear beam; 613 - Left beam; 62 - Vertical frame; 621 - Upper beam; 622 - Lower beam; 623 - Front vertical beam; 624 - Rear vertical beam; 63 - Reinforcing plate; 07 - Medium frequency induction heater; 71 - Coil bracket; 72 - Heating coil; 73 - Connecting plate; 731 - First fixing hole; 732 - Second fixing hole; 74 - Insulating plate; 75 - First space; 08 - First lead screw; 09 - First motor; 10 - Coupling; 11 - Optical rod; 12 - Linear bearing; 13 - Counterweight; 14 - Second motor; 15 - Second lead screw; 16 - Cross beam of the fixing bracket; 17 - Control cabinet; 18 - Controller; 19 - First limiting device; 20 - Second limiting device; 21 - Vacuum pump. Detailed implementation manners

[0041] The present invention will be further described in detail below in conjunction with the detailed implementation manners and with reference to the drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its applications.

[0042] Referring to the following drawings, non - restrictive and non - exclusive embodiments will be described, where the same reference numerals represent the same components, unless otherwise specifically stated.

[0043] A manufacturing device for a large - scale wear - resistant liner by dual - liquid composite casting, as Figures 1 to 13 shown, includes a ground fixing bracket 01, on the upper surface of which there are provided a number of guide rails 02. In this embodiment, the ground fixing bracket 01 is fixed on a cement floor; a cylindrical sand box 03, which is arranged on the ground fixing bracket 01. Specifically, as Figure 1 and 13 shown, the cylindrical sand box 03 is placed at a designated position on the ground fixing bracket 01, that is, on the boss 011 near the right - hand end of the guide rail 02, and can be freely lifted off the ground fixing bracket 01 according to production requirements. Inside the cylindrical sand box 03, there is arranged an evaporative pattern model 04 with a vertical parting surface. In the middle of the evaporative pattern model 04, there is a vertically arranged metal partition 05, through which the melted alloy steel and high - chromium cast iron liquids can be respectively injected into the evaporative pattern cavity from the left and right sides of the metal partition 05. The evaporative pattern model 04 mentioned here is the model of the large - scale wear - resistant liner, and this model and the gating system are made of special foam materials for evaporative patterns (copolymer foam board or copolymer foamed white mold) according to the process requirements; a moving bracket 06, which is arranged on the guide rail 02. Under the action of a driving mechanism, the moving bracket 06 can approach or move away from the cylindrical sand box 03, asFigure 2 and 12 As shown in Figure 2 and 12 , the movable support 06 is slidably arranged on the guide rail 02 through ball bearings 021; the intermediate frequency induction heater 07 is arranged on the movable support 06 and includes a coil support 71, a heating coil 72 and a connecting plate 73. The coil support 71 is in the shape of a cylindrical tube with openings at both the top and bottom; the heating coil 72 is insulated from the coil support 71 and is arranged inside the coil support 71 along the side wall of the coil support 71. There is a first space 75 for accommodating the cylindrical sand box 03 in the middle of the surrounding heating coil 72. The heating coil 72 is connected to the control cabinet 17 through a water-cooled cable; the connecting plate 73 is horizontally arranged on one side of the coil support 71 close to the movable support 06. A part of the projection of the connecting plate 73 and the movable support 06 on the horizontal plane overlaps, and a first fixing hole 731 is correspondingly arranged at the overlapping position. A first lead screw 08 is arranged through the first fixing hole 731, and a first motor 09 is connected to the first lead screw 08, so that the rotation of the first motor 09 can drive the intermediate frequency induction heater 07 to move up and down.

[0044] The above device is used for manufacturing a double-fluid composite casting large-scale wear-resistant lining plate, that is, two kinds of liquids are used to cast a large-scale wear-resistant lining plate. A metal partition 05 is arranged in the middle of the lost foam model 04, which can effectively prevent the mutual penetration of the molten metal on both sides during the pouring process and affect the quality of the casting; the vertical pouring method is adopted, and the melted alloy steel and high chromium cast iron liquids are simultaneously injected into the lost foam cavity from the left and right sides of the metal partition 05, which effectively avoids the problem of poor bonding of the bonding layer caused by the oxidation of the molten metal surface; after pouring, under the action of the driving mechanism, the intermediate frequency induction heater 07 is pushed directly above the cylindrical sand box 03. Under the action of the first motor 09, the intermediate frequency induction heater 07 is moved downward until the height of the heating coil 72 matches the height of the lost foam model 04 (including the gating system 41 and riser 42 parts of the lost foam model 04), and then heating starts and the temperature is maintained for 3 to 10 minutes (the specific heating time is determined according to the size of the lining plate), so that the double-layer molten metal is fully melted and combined with the metal partition 05, avoiding the phenomenon of poor fusion in each area caused by uneven heat, resulting in an unstable bonding layer or even cracking.

[0045] Specifically, as shown in Figure 09, the metal partition 05 is made of Q234 steel plate, which is arranged along the thickness direction of the lost foam model 04 and is at a distance of one-third of the thickness of the lost foam model 04 from the lining plate installation surface 43 (that is, the non-working surface of the lining plate). The thickness of the metal partition 05 is selected according to the total weight and thickness of the lining plate, generally 3 to 8 mm thick. After cutting the metal partition 05 according to the shape of the lining plate, surface polishing is also required, and rust is removed using hydrochloric acid-based preparations. Specifically, as Figure 2 and 8As shown, it further includes a vacuum negative pressure pumping device, which includes a vacuum pump 21, a cooling water circulation device and a control device. A number of negative pressure pipes 31 are arranged along the inner wall and bottom of the cylindrical sand box 03. The negative pressure pipes 31 are symmetrically distributed, interconnected, and concentrated into a main channel. A negative pressure pipe interface 32 communicating with the main channel is arranged outside the cylindrical sand box 03, so that the negative pressure pipe interface 32 is connected to the vacuum pump to pump negative pressure for the cylindrical sand box 03. In specific production, the negative pressure pumping is carried out through the control device. In order to facilitate the lifting of the cylindrical sand box 03, a number of lifting lugs 33 can also be arranged on the upper part and side of the cylindrical sand box 03. As Figure 1 、 8 and shown in Fig. 9, the outer diameter of the cylindrical sand box 03 is preferably d + (200 - 300) mm of the maximum outer dimension of the lost foam pattern 04, and the height is preferably h + (400 - 600) mm of the highest outer dimension of the lost foam pattern 04 (including the height of the gating system 41 and the riser 42).

[0046] In some examples of this embodiment, as Figure 1 and shown in Fig. 07, the moving support 06 includes a horizontal frame 61 and a vertical frame 62, which are welded by a number of steel plates. The horizontal frame 61 and the vertical frame 62 are combined into an "L" shape. The horizontal frame 61 includes a front beam 611, a rear beam 612 and a left beam 613. The vertical frame 62 includes an upper beam 621, a lower beam 622, a front vertical beam 623 and a rear vertical beam 624. Two guide rails 02 are arranged on the ground fixing support 01 corresponding to the positions of the front beam 611 and the rear beam 612 of the horizontal frame 61. In order to improve the overall stability of the moving support 06, a number of reinforcing plates 63 can be arranged between the horizontal frame 61 and the vertical frame 62. In this example, two reinforcing plates 63 are arranged. Specifically, in order to improve the stability and balance of the whole device, the first fixing hole 731 is arranged in the middle of the upper beam 621, the first motor 09 is arranged on the upper beam 621, and the lower end of the first lead screw 08 is fixed on the connecting plate 73. The first motor 09 drives the whole intermediate frequency induction heater 07 to move up and down through a turbine lead screw structure. When the first motor 09 rotates, the rotational motion of the first motor 09 is transmitted to the first lead screw 08 through the coupling 10. By controlling the forward and reverse rotation of the first motor 09, the up and down movement of the first lead screw 08 is realized, so as to drive the connecting plate 73 to move up and down, and finally drive the intermediate frequency induction heater 07 to move up and down.

[0047] In some examples of this embodiment, as Figure 1 、 10As shown in FIGS. 10 and 11, two second fixing holes 732 are correspondingly provided on the upper beam 621 and the connecting plate 73. The second fixing holes 732 are symmetrically arranged on both sides of the first fixing hole 731 and are in a straight line with the first fixing hole 731. A smooth rod 11 is arranged in the second fixing hole 732. The lower end of the smooth rod 11 is fixed on the connecting plate 73, and the upper end passes through the second fixing hole 732 of the upper beam 621. This structure plays a guiding role, making the up and down movement of the intermediate frequency induction heater 07 smoother. Specifically, as Figure 1 and 7 shown, a linear bearing 12 can be arranged in the second fixing hole 732 at the upper beam 621, and the smooth rod 11 is arranged in the linear bearing 12, which can reduce the friction between the smooth rod 11 and the connecting plate 73, improve the smoothness of movement, make the up and down movement of the smooth rod 11 more stable, with high precision and long service life.

[0048] In some examples of this embodiment, as Figure 1 shown, in order to increase the overall stability of the device, a counterweight 13 can be arranged on the connecting plate 73, away from the intermediate frequency induction heater 07. The counterweight 13 is arranged on the left side of the upper beam 621. The weight of the counterweight 13 can be set according to the weight of the intermediate frequency induction heater 07, mainly to make the up and down movement of the intermediate frequency induction heater 07 more stable. The specific weight of the counterweight is not limited.

[0049] In some examples of this embodiment, as Figure 1 shown, the driving mechanism includes a second motor 14 and a second lead screw 15. A fixed support cross beam 16 is arranged on one side of the ground fixed support 01 away from the cylindrical sand box 03. The second motor 14 is arranged on the fixed support cross beam 16. The second lead screw 15 is horizontally arranged and is connected to the second motor 14 through a coupling. The right end of the second lead screw 15 is fixedly arranged at the lower end of the moving support 06. During specific operation, the second motor 14 transmits its rotational movement to the second lead screw 15 through the coupling. By controlling the forward and reverse rotation of the second motor 14, the left and right movement of the moving support 06 is realized, driving the moving support 06 to approach or move away from the cylindrical sand box 03, so as to cover or remove the intermediate frequency induction heater 07 from the cylindrical sand box 03. It can be understood that, as Figure 5 and 6 shown, when the intermediate frequency induction heater 07 covers the cylindrical sand box 03, the intermediate frequency induction heater 07 is in a heating state. Through induction heating, the alloy steel and high chromium cast iron liquid are fully melted and combined with the metal partition, avoiding the phenomenon of poor fusion in each area caused by uneven heat. As Figure 1 、 2As shown in FIGS. 3 and 4, after the heating is completed, the intermediate frequency induction heater 07 is moved out of the cylindrical sand box 03. Of course, the temperature of the just-heated casting is very high. In order to cool the cylindrical sand box 03 and the casting inside and improve the cooling efficiency, a water cooling system can be arranged in the intermediate frequency induction heater 07. After the heating is completed, the water cooling system is started to help the casting cool to a certain temperature (such as 300 °C), and then the intermediate frequency induction heater 07 is moved out. Of course, in order to make the movement of the moving bracket 06 more smooth, polished rods can also be arranged on both sides of the second lead screw 15. The specific connection relationship is similar to that of the polished rods on both sides of the first lead screw, which will not be elaborated here.

[0050] In some examples of this embodiment, such as Figure 10 and 11 As shown, the intermediate frequency induction heater 07 further includes an insulating plate 74, which is vertically arranged on the inner side wall of the coil bracket 71. The heating coil 72 passes through the insulating plate 74 and is wound around the inside of the coil bracket 71. This insulating plate 4 serves to fix the heating coil 72, so that the heating coil 72 is at a certain distance from the heating bracket 71.

[0051] Specifically, as Figure 1 shown, it further includes a control cabinet 17, which is used to control the heating of the intermediate frequency induction heater 07 and the movements of the first motor 09 and the second motor 14. Specifically, the relevant control actions can be integrated into a controller 18 for the user to operate. Specifically, infrared limit devices can also be arranged on the moving trajectories of the moving bracket 06 and the intermediate frequency induction heater 07. As Figure 1 shown, a first limit device 19 is arranged on the left side of the cylindrical sand box 03, close to the cylindrical sand box 03, to control the extreme position of the moving bracket 06 moving to the right; a second limit device 20 is arranged on the lower part of the front vertical beam 623 or the rear vertical beam 624 of the moving bracket 06 to control the extreme position of the connecting plate 73 moving downwards. The first limit device 19 and the second limit device 20 can be set according to specific requirements to adapt to different production requirements.

[0052] The following presents the usage method of the above device, which specifically includes the following steps: (1) Place the lost foam pattern 04 into the cylindrical sand box 03, and then fill with sand, vibrate to compact, and evacuate; (2) Simultaneously inject the melted alloy steel and high chromium cast iron liquids from both the left and right sides of the metal partition 05 into the lost foam cavity; (3) Start the first motor 09 and the second motor 14 to move the intermediate frequency induction heater 07 to the extreme position; (4) Start the intermediate frequency induction heater 07, heat and maintain the temperature for several minutes; (5) Stop heating and move the intermediate frequency induction heater 07 out of the cylindrical sand box 03; (6) After the casting cools to below 300 °C, take out the casting from the cylindrical sand box 03 and clean it.

[0053] Those skilled in the art will recognize that numerous variations to the above description are possible, so the embodiments and the figures are only used to describe one or more specific embodiments.

[0054] Although the exemplary embodiments that are regarded as the present invention have been described and recited, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Additionally, many modifications can be made to adapt a particular situation to the teachings of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but the present invention may also include all embodiments and their equivalents that fall within the scope of the present invention.

Claims

1. A manufacturing device for double-liquid composite casting of large wear-resistant lining, characterized in that: It includes a ground fixing bracket, the upper surface of which is provided with a plurality of guide rails; A cylindrical sand box is arranged on the ground fixed bracket, wherein a vertically parted lost foam model is arranged in the cylindrical sand box, and a metal partition is vertically arranged in the middle of the lost foam model, and the smelted alloy steel and high chromium cast iron liquid can be respectively injected into the lost foam model cavity from the left and right sides of the metal partition; A movable bracket is arranged on the guide rail, and under the action of a driving mechanism, the movable bracket can approach or move away from the cylindrical sand box; A medium frequency induction heater is arranged on the movable bracket, comprising a coil bracket, a heating coil and a connecting plate, wherein the coil bracket is in the shape of a cylinder with openings at the top and the bottom; the heating coil is insulated from the coil bracket, and is arranged in the coil bracket along the side wall of the coil bracket, and a first space for accommodating the cylindrical sand box is provided in the middle of the surrounding heating coil; the connecting plate is horizontally arranged on a side of the coil bracket close to the movable bracket, and the projections of the connecting plate and the movable bracket on the horizontal plane partially overlap, and a first fixing hole is correspondingly arranged at the overlapping position, a first screw rod is arranged through the first fixing hole, and a first motor is adopted to connect the first screw rod, so that the rotation of the first motor can drive the medium frequency induction heater to move up and down.

2. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 1 is characterized in that: The metal partition is made of Q234 steel plate, is arranged along the thickness direction of the lost foam model, and the distance from the liner installation surface is one third of the thickness of the lost foam model.

3. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 1 is characterized in that: It also includes a vacuum negative pressure extraction device, which includes a vacuum pump, a cooling water circulation device and a control device. A plurality of negative pressure pipes are arranged along the inner arm and the bottom of the cylindrical sand box. The negative pressure pipes are symmetrically distributed, interconnected, and concentrated into a main channel. A negative pressure pipe interface connected to the main channel is arranged outside the cylindrical sand box, so that the negative pressure pipe interface is connected to the vacuum pump to extract negative pressure for the cylindrical sand box.

4. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 1 is characterized in that: The movable bracket includes a horizontal frame and a vertical frame, which are welded by a plurality of steel plates. The horizontal frame and the vertical frame are combined into an "L" shape. The horizontal frame includes a front beam, a rear beam and a left beam. The vertical frame includes an upper beam, a lower beam, a front vertical beam and a rear vertical beam. Two guide rails are arranged on the ground fixed bracket corresponding to the positions of the front beam and the rear beam of the horizontal frame.

5. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 4 is characterized in that: Two second fixing holes are correspondingly arranged on the upper beam and the connecting plate, the second fixing holes are symmetrically arranged on both sides of the first fixing hole and are in a straight line with the first fixing hole; a light rod is arranged in the second fixing hole, the lower end of the light rod is fixed on the connecting plate, and the upper end passes through the second fixing hole of the upper beam.

6. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 1 is characterized in that: A counterweight is arranged on the connection plate away from the medium frequency induction heater.

7. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 1 is characterized in that: The driving mechanism includes a second motor and a second screw rod. A fixed support beam is arranged on the side of the ground fixed support away from the cylindrical sand box. The second motor is arranged on the fixed support beam. The second screw rod is arranged horizontally and connected to the second motor through a coupling. The right end of the second screw rod is fixedly arranged at the lower end of the movable support.

8. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 7 is characterized in that: It also includes a control cabinet, which is used to control the heating of the medium frequency induction heater, the movement of the first motor and the second motor.

9. The manufacturing device of large wear-resistant lining plate by double liquid composite casting according to claim 1 is characterized in that: The medium frequency induction heater also includes an insulating plate, which is vertically arranged on the inner side wall of the coil support, and the heating coil passes through the insulating plate and is surrounded by the coil support.

10. A method for using the manufacturing device for double-liquid composite casting large wear-resistant lining according to claim 7, characterized in that: The following steps are involved: (1) Place the lost foam model into a cylindrical sand box, then fill it with sand, compact it, and evacuate it; (2) injecting the molten alloy steel and high chromium cast iron liquid into the evaporative mold cavity from the left and right sides of the metal partition at the same time; (3) starting the first motor and the second motor to move the medium frequency induction heater to the extreme position; (4) Start the medium frequency induction heater, heat and maintain the temperature for several minutes; (5) Stop heating and move the medium frequency induction heater outside the cylindrical sand box; (6) After the casting has cooled to below 300°C, take the casting out of the cylindrical sand box and clean it.

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